java攻城狮之路(Android篇)--与服务器交互

时间：2023-12-15 21:23:02

一、图片查看器和网页源码查看器

在输入地址的是不能输入127.0.0.1 或者是 localhost.
ScrollView :可以看成一个滚轴 可以去包裹很多的控件在里面

练习1(图片查看器)：

java攻城狮之路(Android篇)--与服务器交互

package com.shellway.imagelooker;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import org.apache.http.conn.ConnectTimeoutException;

import android.support.v7.app.ActionBarActivity;

import android.annotation.SuppressLint;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.Bundle;

import android.os.StrictMode;

import android.view.View;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    private EditText path;

    private ImageView iv;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        path = (EditText) findViewById(R.id.et_path);

        iv = (ImageView) findViewById(R.id.iv_image);

        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();

        StrictMode.setThreadPolicy(policy);

    }

    public void onLook(View view){

        String spath = path.getText().toString();

        System.out.println(spath);

        if(spath.equals("")){

            Toast.makeText(this, "输入的地址为空", Toast.LENGTH_SHORT).show();

        }else {

            try {

                URL url = new URL(spath);

                HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                conn.setRequestMethod("GET");

                conn.setConnectTimeout(5000);

                if(conn.getResponseCode() == 200){

                    InputStream is = conn.getInputStream();

                    Bitmap bm = BitmapFactory.decodeStream(is);

                    if(bm == null){

                        Toast.makeText(this, "获取的图片流为空", Toast.LENGTH_SHORT).show();

                    }else{

                        iv.setImageBitmap(bm);

                    }

                }else{

                    Toast.makeText(this, "输入的路径不存在", Toast.LENGTH_SHORT).show();

            }

            } catch (Exception e) {

                e.printStackTrace();

                if(e instanceof MalformedURLException){

                    Toast.makeText(this, "输入的路径格式错误", Toast.LENGTH_SHORT).show();

                }else if(e instanceof ConnectTimeoutException){

                    Toast.makeText(this, "连接超时错误", Toast.LENGTH_SHORT).show();

                }else if(e instanceof IOException){

                    Toast.makeText(this, "获取数据错误", Toast.LENGTH_SHORT).show();

                }else{

                    Toast.makeText(this, "未知错误", Toast.LENGTH_SHORT).show();

                }

            }

        }

    }

}

MainActivity.java

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.shellway.imagelooker"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

    <uses-permission android:name="android.permission.INTERNET"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

练习2(网页源码查看器)：

java攻城狮之路(Android篇)--与服务器交互

package com.shellway.htmllooker;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import org.apache.http.client.utils.URIUtils;

import android.support.v7.app.ActionBarActivity;

import android.text.TextUtils;

import android.annotation.SuppressLint;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.os.StrictMode;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.webkit.URLUtil;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    protected static final int CHANGE_UI = 1;

    private EditText et_path;

    private TextView iv;

    private String path;

//    private Handler handler;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        et_path = (EditText) findViewById(R.id.et_path);

        iv = (TextView) findViewById(R.id.iv_image);

/*        handler = new Handler(){

            public void handleMessage(Message msg) {

                if(msg.what == CHANGE_UI){

                String s = (String) msg.obj;

                iv.setText(s);

                }

            };

        };*/

        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();

        StrictMode.setThreadPolicy(policy);

    }

    public void onLook(View view){

        path = et_path.getText().toString().trim();

        if(TextUtils.isEmpty(path)){

            Toast.makeText(MainActivity.this, "您输入的地址为空", Toast.LENGTH_SHORT).show();

        }else{

        // new Thread(){

        //     public void run() {

                    try {

                        URL url = new URL(path);

                        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                        conn.setRequestMethod("GET");

                        conn.setConnectTimeout(5000);

                        if(conn.getResponseCode()==200){

                            InputStream is = conn.getInputStream();

                            ByteArrayOutputStream bos = new ByteArrayOutputStream();

                            byte[] buffer = new byte[1024];

                            int len=0 ;

                            while((len = is.read(buffer))!=-1){

                                bos.write(buffer, 0, len);

                            }

                            String text =bos.toString();

                            bos.close();

                            is.close();

                        //    Message msg = new Message();

                        //    msg.what = CHANGE_UI;

                        //    msg.obj = text;

                        //    handler.sendMessage(msg);

                            iv.setText(text);

                        }

                    } catch (Exception e) {

                        e.printStackTrace();

                    }

        //     };

    //     }.start();

        }

    }

}

MainActivity.java

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.shellway.htmllooker"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

    <uses-permission android:name="android.permission.INTERNET"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

二、网易新闻客户端

java攻城狮之路(Android篇)--与服务器交互

1.对抓取的数据进行一个描述，我们用的是xml文件来进行描述，如：
<HeaderNews>
<HeaderNew>
<image>httP://192.168.1.101:8080/web/a.jpg<image>
<title>女子花3万相亲</title>
<content>婚介所向其介绍男友后消失<content>
<count>44跟帖</count>
</HeaderNew>
</HeaderNews>

首先数据是动态的。我们可以用servlet(查询数据库里面的数据) - 然后传递数据通过request(转发)--> jsp 显示

findViewById() 直接使用是在我们的activity的布局里面去查找

注意：流被使用过之后，就不能再次使用。

练习：

首先,模拟一个服务器(创建web工程)：

java攻城狮之路(Android篇)--与服务器交互

<?xml version="1.0" encoding="utf-8"?>

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<HeaderNews>

<c:forEach items="${headerNews}"  var="headernew">

<HeaderNew>

      <image>${headernew.image}</image>

      <title>${headernew.title}</title>

      <content>${headernew.content}</content>

      <count>${headernew.count}</count>

</HeaderNew>

</c:forEach>

</HeaderNews>

headernewsxml.jsp

package com.shellway.news.domain;

public class HeaderNew {

    private String image;

    private String title;

    private String content;

    private String count;

    public HeaderNew() {

        super();

    }

    public HeaderNew(String image, String title, String content, String count) {

        super();

        this.image = image;

        this.title = title;

        this.content = content;

        this.count = count;

    }

    public String getImage() {

        return image;

    }

    public void setImage(String image) {

        this.image = image;

    }

    public String getTitle() {

        return title;

    }

    public void setTitle(String title) {

        this.title = title;

    }

    public String getContent() {

        return content;

    }

    public void setContent(String content) {

        this.content = content;

    }

    public String getCount() {

        return count;

    }

    public void setCount(String count) {

        this.count = count;

    }

    @Override

    public String toString() {

        return "HeaderNew [image=" + image + ", title=" + title + ", content="

                + content + ", count=" + count + "]";

    }

}

HeaderNew.java

package com.shellway.news.service;

import java.util.ArrayList;

import java.util.List;

import com.shellway.news.domain.HeaderNew;

public class HeaderNewsService {

   private List<HeaderNew> HeaderNews = new ArrayList<HeaderNew>();

    public List<HeaderNew> getHeaderNews(){

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/a.jpg","女子花3万相亲","婚介所向其介绍男友1后消失","44跟帖"));

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/b.jpg","女子花4万相亲","婚介所向其介绍男友2后消失","12跟帖"));

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/c.jpg","女子花5万相亲","婚介所向其介绍男友3后消失","22跟帖"));

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/d.jpg","女子花6万相亲","婚介所向其介绍男友4后消失","32跟帖"));

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/e.jpg","女子花7万相亲","婚介所向其介绍男友5后消失","24跟帖"));

        HeaderNews.add(new HeaderNew("http://192.168.1.101:80/web/a.jpg","女子花8万相亲","婚介所向其介绍男友6后消失","15跟帖"));

        return HeaderNews;

    }

}

HeaderNewsService.java

package com.shellway.news.servlet;

import java.io.IOException;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.catalina.connector.Request;

import com.shellway.news.domain.HeaderNew;

import com.shellway.news.service.HeaderNewsService;

public class HeaderNewsServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public HeaderNewsServlet() {

        super();

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

          HeaderNewsService service = new HeaderNewsService();

          List<HeaderNew> HeaderNews = service.getHeaderNews();

          request.setAttribute("headerNews", HeaderNews);

          request.getRequestDispatcher("/WEB-INF/page/headernewsxml.jsp").forward(request, response);

    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

}

HeaderNewsServlet.java

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

  <display-name>web</display-name>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

  <servlet>

    <description></description>

    <display-name>HeaderNewsServlet</display-name>

    <servlet-name>HeaderNewsServlet</servlet-name>

    <servlet-class>com.shellway.news.servlet.HeaderNewsServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>HeaderNewsServlet</servlet-name>

    <url-pattern>/HeaderNewsServlet</url-pattern>

  </servlet-mapping>

</web-app>

web.xml

然后,创建一个Android客户端工程(News)

java攻城狮之路(Android篇)--与服务器交互

package com.shellway.news.domain;

public class HeaderNew {

    private String image;

    private String title;

    private String content;

    private String count;

    public HeaderNew() {

        super();

    }

    public HeaderNew(String image, String title, String content, String count) {

        super();

        this.image = image;

        this.title = title;

        this.content = content;

        this.count = count;

    }

    public String getImage() {

        return image;

    }

    public void setImage(String image) {

        this.image = image;

    }

    public String getTitle() {

        return title;

    }

    public void setTitle(String title) {

        this.title = title;

    }

    public String getContent() {

        return content;

    }

    public void setContent(String content) {

        this.content = content;

    }

    public String getCount() {

        return count;

    }

    public void setCount(String count) {

        this.count = count;

    }

    @Override

    public String toString() {

        return "HeaderNew [image=" + image + ", title=" + title + ", content="

                + content + ", count=" + count + "]";

    }

}

HeaderNew.java

package com.shellway.news;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.ArrayList;

import java.util.List;

import java.util.Properties;

import org.xmlpull.v1.XmlPullParser;

import android.content.Context;

import android.os.Environment;

import android.util.Xml;

import com.shellway.news.domain.HeaderNew;

public class HeaderNewsService {

    //得到所有的头条新闻

    public List<HeaderNew> getHeaderNews(Context context) throws Exception{

        String path = context.getResources().getString(R.string.serverurl);

        URL url = new URL(path);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        conn.setRequestMethod("GET");

        conn.setConnectTimeout(5000);

        if(conn.getResponseCode()==200){

            InputStream is = conn.getInputStream();

            return parserHeaderNews(is);

        }

        return null;

    }

    //解析流为新闻集合

    private List<HeaderNew> parserHeaderNews(InputStream is) throws Exception {

        List<HeaderNew> headerNews = null;

        HeaderNew headerNew = null;

        //1 得到解析器

        XmlPullParser parser = Xml.newPullParser();

        //设值解析流编码

        parser.setInput(is, "utf-8");

        //得到解析事件

        int eventType = parser.getEventType();

        while(eventType!=XmlPullParser.END_DOCUMENT){

            switch (eventType) {

            case XmlPullParser.START_TAG:

                if("HeaderNews".equals(parser.getName())){

                    headerNews = new ArrayList<HeaderNew>();

                }else if("HeaderNew".equals(parser.getName())){

                    headerNew = new HeaderNew();

                }else if("image".equals(parser.getName())){

                    headerNew.setImage(parser.nextText());

                }else if("title".equals(parser.getName())){

                    headerNew.setTitle(parser.nextText());

                }else if("content".equals(parser.getName())){

                    headerNew.setContent(parser.nextText());

                }else if("count".equals(parser.getName())){

                    headerNew.setCount(parser.nextText());

                }

                break;

            case XmlPullParser.END_TAG:

                if ("HeaderNew".equals(parser.getName())) {

                    headerNews.add(headerNew);

                    headerNew = null;

                }

               break;

            default:

                break;

            }

            eventType = parser.next();

        }

        return headerNews;

    }

    //得到文件

    public File getImage(String path) throws Exception{

        URL url = new URL(path);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        conn.setRequestMethod("GET");

        conn.setConnectTimeout(5000);

        Properties pro = new Properties();

        if(conn.getResponseCode()==200){

            InputStream is = conn.getInputStream();

            //缓存图片

            String name = path.substring(path.lastIndexOf("/")+1);

            File file = new File(Environment.getExternalStorageDirectory(),name);

            FileOutputStream fos = new FileOutputStream(file);

            byte[] buffer = new byte[1024];

            int len = 0;

            while ((len = is.read(buffer))!=-1) {

                fos.write(buffer, 0, len);

            }

            fos.close();

            return file;

        }

        return null;

    }

}

HeaderNewsService.java

package com.shellway.news;

import java.io.File;

import java.util.List;

import com.shellway.news.domain.HeaderNew;

import android.support.v7.app.ActionBarActivity;

import android.annotation.SuppressLint;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.os.StrictMode;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    private ListView lv_news;

    private HeaderNewsService service;

    private List<HeaderNew> headernews;

    private LayoutInflater mInflater;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        service = new HeaderNewsService();

        mInflater = LayoutInflater.from(this);

        lv_news = (ListView) findViewById(R.id.lv_news);

        //下面两行是允许在主线程中执行联网这一耗时操作

        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();

        StrictMode.setThreadPolicy(policy);

        try {

            headernews = service.getHeaderNews(this);

            //设值数据

            lv_news.setAdapter(new MyBaseAdapter());

        } catch (Exception e) {

            e.printStackTrace();

            Toast.makeText(this, "获取新闻失败", Toast.LENGTH_SHORT).show();

        }

    }

    private class MyBaseAdapter extends BaseAdapter{

        @Override

        public int getCount() {

            return headernews.size();

        }

        @Override

        public Object getItem(int position) {

            return null;

        }

        @Override

        public long getItemId(int position) {

            return 0;

        }

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

            //View item = View.inflate(getApplicationContext(), R.layout.item, null);

            //加载布局

             View item = mInflater.inflate(R.layout.item, null);

            //得到控件

             ImageView iv = (ImageView) item.findViewById(R.id.iv_image);

             TextView title = (TextView) item.findViewById(R.id.tv_title);

             TextView content = (TextView) item.findViewById(R.id.tv_content);

             TextView count = (TextView) item.findViewById(R.id.tv_count);

            //得到数据

             HeaderNew hw = headernews.get(position);

            //绑定数据

             File imagefile;

            try {

                //图片是否有缓存   现在图片应该保存sdcard

                String path = hw.getImage();

                String name = path.substring(path.lastIndexOf("/")+1);

                File file = new File(Environment.getExternalStorageDirectory(),name);

                if (!file.exists()) {

                     imagefile = service.getImage(hw.getImage());

                    if(imagefile!=null){

                        iv.setImageURI(Uri.fromFile(imagefile));

                    }

                }else {

                    iv.setImageURI(Uri.fromFile(file));

                }

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

             title.setText(hw.getTitle());

             content.setText(hw.getContent());

             count.setText(hw.getCount());

            return item;

        }

    }

}

MainActivity.java

package com.shellway.news.test;

import java.util.List;

import com.shellway.news.HeaderNewsService;

import com.shellway.news.domain.HeaderNew;

import android.test.AndroidTestCase;

import android.util.Log;

public class HeaderNewsTest extends AndroidTestCase {

    public void testGetHeaderNews() throws Exception{

        HeaderNewsService service = new HeaderNewsService();

        List<HeaderNew>  headerNews = service.getHeaderNews(getContext());

        for(HeaderNew headerNew:headerNews){

            Log.i("i", headerNew.toString());

        }

    }

}

HeaderNewsTest.java

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.shellway.news"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

        <instrumentation

        android:targetPackage="com.shellway.news"

        android:name="android.test.InstrumentationTestRunner" />

    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

     <uses-library android:name="android.test.runner" />

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <ListView android:id="@+id/lv_news"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

         />

</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#EEEDEC"

    android:layout_margin="5dp"

     >

    <ImageView

        android:id="@+id/iv_image"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:src="@drawable/default1"

        android:layout_margin="5dp"

        />

    <TextView

        android:id="@+id/tv_title"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_toRightOf="@id/iv_image"

        android:textSize="22sp"

        android:textColor="@android:color/black"

        android:text="小三小四"

        />

    <TextView

        android:id="@+id/tv_content"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@id/tv_title"

        android:layout_toRightOf="@id/iv_image"

        android:textSize="18sp"

        android:text="小五小六"

        />

    <TextView

        android:id="@+id/tv_count"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@id/tv_content"

        android:layout_alignParentRight="true"

        android:textSize="18sp"

        android:text="44跟帖"

        />

</RelativeLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="serverurl">http://192.168.1.101:80/web/HeaderNewsServlet</string>

</resources>

values下的常量配置文件config.xml

效果图：

java攻城狮之路(Android篇)--与服务器交互

方式二：利用json实现数据的获取,json是一个轻量级的数组：
格式：[{image:"httP://192.168.1.101:8080/web/a.jpg",title:"...",content:"...",count:"..."}

java攻城狮之路(Android篇)--与服务器交互

服务器端增加一个servlet(HeaderNewsJsonServlet)：

package com.shellway.news.servlet;

import java.io.IOException;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.shellway.news.domain.HeaderNew;

import com.shellway.news.service.HeaderNewsService;

public class HeaderNewsJsonServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public HeaderNewsJsonServlet() {

        super();

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

           HeaderNewsService headerNewsService = new HeaderNewsService();

           List<HeaderNew> headerNews = headerNewsService.getHeaderNews();

           StringBuilder sb = new StringBuilder("[");

           for (HeaderNew headerNew : headerNews) {

            sb.append("{");

            sb.append("image:").append("\"").append(headerNew.getImage()).append("\"").append(",");

            sb.append("title:").append("\"").append(headerNew.getTitle()).append("\"").append(",");

            sb.append("content:").append("\"").append(headerNew.getContent()).append("\"").append(",");

            sb.append("count:").append("\"").append(headerNew.getCount()).append("\"");

            sb.append("}");

            sb.append(",");

        }

           sb.deleteCharAt(sb.length()-1);

           sb.append("]");

           request.setAttribute("json", sb);

           request.getRequestDispatcher("/WEB-INF/page/headernewsjson.jsp").forward(request, response);

    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        doGet(request, response);

    }

}

HeaderNewsJsonServlet.java

在Android客户断中增加(HeaderNewsJsonService)：

package com.shellway.news;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.ArrayList;

import java.util.List;

import org.json.JSONArray;

import org.json.JSONObject;

import android.content.Context;

import com.shellway.news.domain.HeaderNew;

public class HeaderNewsJsonService {

    List<HeaderNew> headerNews = new ArrayList<HeaderNew>();

    public List<HeaderNew> getHeaderNewsFromJson(Context context) throws Exception{

        String path = context.getResources().getString(R.string.serverjsonurl);

            URL url = new URL(path);

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestMethod("GET");

            conn.setConnectTimeout(5000);

            if(conn.getResponseCode()==200){

                InputStream is = conn.getInputStream();

                ByteArrayOutputStream bos = new ByteArrayOutputStream();

                byte[] buffer = new byte[1024];

                int len = 0;

                while((len = is.read(buffer)) != -1){

                    bos.write(buffer, 0, len);

                }

                String s = bos.toString();

                bos.close();

                is.close();

                JSONArray jsonArray = new JSONArray(s);

                for (int i = 0; i < jsonArray.length(); i++) {

                    JSONObject jsonObject = jsonArray.getJSONObject(i);

                    HeaderNew headerNew = new HeaderNew();

                    headerNew.setImage(jsonObject.getString("image"));

                    headerNew.setTitle(jsonObject.getString("title"));

                    headerNew.setContent(jsonObject.getString("content"));

                    headerNew.setCount(jsonObject.getString("count"));

                    headerNews.add(headerNew);

                }

            }

        return headerNews;

    }

}

HeaderNewsJsonService.java

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="serverurl">http://192.168.1.101:80/web/HeaderNewsServlet</string>

    <string name="serverjsonurl">http://192.168.1.101:80/web/HeaderNewsJsonServlet</string>

</resources>

config.xml

三、以get请求和以post请求往服务器提交数据，通过httpClient提交数据、服务器端文件上传

1、get请求：(把要提交的数据直接添加到路径的后面)
缺点：由于服务器对请求路径的长度是有限制的。最大不能超过4k,截取数据导致数据不完整。

练习：(以get请求数据提交到服务器，并且实现统一的编码)

服务器端：

java攻城狮之路(Android篇)--与服务器交互

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>login</title>

</head>

<body>

  <form action="http://192.168.1.101:80/LoginForWeb/LoginServlet" method="get">

                          用户名  ：<input type="text" name="username"><br/>

                          密&nbsp;&nbsp;&nbsp;&nbsp;码：    <input type="password" name="password"><br/>

       <input type="submit" value="登录">

  </form>

</body>

</html>

index.jsp

package com.shellway.login.servlet;

import java.io.IOException;

import java.net.URLEncoder;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public LoginServlet() {

        super();

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         String name = request.getParameter("username");

       //  String name1 = new String(name.getBytes("iso-8859-1"),"utf-8"); 这一行使用过滤器实现

         String password = request.getParameter("password");

         System.out.println("name:"+name+", password:"+password);

    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doGet(request, response);

    }

}

LoginServlet.java

package com.shellway.login.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

public class EncodingSerlvetRequestFilter implements Filter {

    public EncodingSerlvetRequestFilter() {

    }

    public void destroy() {

    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        HttpServletRequest req = (HttpServletRequest) request;

        String method = req.getMethod();

        if (method.equals("GET")) {

            EncodingHttpServletRequestWrapper warpper = new EncodingHttpServletRequestWrapper(req);

            chain.doFilter(warpper, response);

        }else{

            chain.doFilter(request, response);

        }

    }

    public void init(FilterConfig fConfig) throws ServletException {

    }

}

EncodingSerlvetRequestFilter.java

package com.shellway.login.filter;

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletRequestWrapper;

public class EncodingHttpServletRequestWrapper extends HttpServletRequestWrapper {

    private HttpServletRequest request;

    public EncodingHttpServletRequestWrapper(HttpServletRequest request) {

        super(request);

        this.request = request;

    }

    @Override

    public String getParameter(String name) {

        String value = request.getParameter(name);

        if (value != null) {

            String nname;

            try {

                nname = new String(value.getBytes("iso-8859-1"),"utf-8");

            } catch (UnsupportedEncodingException e) {

                e.printStackTrace();

                throw new RuntimeException("请输入正确的字符编码集名称");

            }

            return nname;

        }

        return super.getParameter(name);

    }

}

EncodingHttpServletRequestWrapper.java

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

  <display-name>LoginForWeb</display-name>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

  <servlet>

    <description></description>

    <display-name>LoginServlet</display-name>

    <servlet-name>LoginServlet</servlet-name>

    <servlet-class>com.shellway.login.servlet.LoginServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>LoginServlet</servlet-name>

    <url-pattern>/LoginServlet</url-pattern>

  </servlet-mapping>

  <filter>

    <display-name>SerlvetRequestFilter</display-name>

    <filter-name>SerlvetRequestFilter</filter-name>

    <filter-class>com.shellway.login.filter.EncodingSerlvetRequestFilter</filter-class>

  </filter>

  <filter-mapping>

    <filter-name>SerlvetRequestFilter</filter-name>

    <url-pattern>/*</url-pattern>

  </filter-mapping>

</web-app>

web.xml

Android客户端：

java攻城狮之路(Android篇)--与服务器交互

package com.example.login;

import java.io.UnsupportedEncodingException;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLEncoder;

import android.support.v7.app.ActionBarActivity;

import android.text.TextUtils;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    private EditText et_username;

    private EditText et_password;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        et_username = (EditText) findViewById(R.id.et_username);

        et_password = (EditText) findViewById(R.id.et_password);

    }

    public void login(View view) throws Exception{

        String username = et_username.getText().toString();

        String password = et_password.getText().toString();

        if (TextUtils.isEmpty(username)||TextUtils.isEmpty(password)) {

            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT);

        }else{

            String path = getApplicationContext().getResources().getString(R.string.requesturl);

            StringBuilder sb = new StringBuilder();

            try {

                sb.append(path).append("?").append("username=").append(URLEncoder.encode(username, "utf-8"));

            } catch (UnsupportedEncodingException e) {

                e.printStackTrace();

                throw new RuntimeException("请输入正确的编码集");

            }

            sb.append("&").append("password=").append(password);

            String reqpath = sb.toString();

            URL url = new URL(reqpath);

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestMethod("GET");

            conn.setConnectTimeout(5000);

            if (conn.getResponseCode() == 200 ) {

                Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_SHORT).show();

            }else{

                Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_SHORT).show();

            }

        }

    }

}

MainActivity

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

     >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="用户名" />

    <EditText

        android:id="@+id/et_username"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:hint="请输入用户名"

        />

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="密   码" />

    <EditText

        android:id="@+id/et_password"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:inputType="textPassword"

        android:hint="请输入密码"

        />

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:onClick="login"

        android:text="登录"

        />

</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

     <string name="requesturl">http://192.168.1.101:80/LoginForWeb/LoginServlet</string>

</resources>

config.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.login"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

   <uses-permission android:name="android.permission.INTERNET"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

效果图：

java攻城狮之路(Android篇)--与服务器交互java攻城狮之路(Android篇)--与服务器交互

2、post请求：
android系统引入了一个第三方的框架 HttpClient，他就是对http协议的一个封装
文件上传：我们使用三方开源框架upload
在android端我们也使用HttpClient来实现文件的上传：HttpClient的版本必须在3.0之上。

练习(1、普通的post请求 2、利用HttpClient实现get、post请求 3、文件上传)：

java攻城狮之路(Android篇)--与服务器交互

package com.shellway.login.activity;

import com.shellway.login.activity.R;

import com.shellway.login.service.LoginService;

import android.support.v7.app.ActionBarActivity;

import android.text.TextUtils;

import android.annotation.SuppressLint;

import android.os.Bundle;

import android.os.StrictMode;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    LoginService service ;

    private EditText et_username;

    private EditText et_password;

    private EditText et_filename;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        service = new LoginService();

        et_username = (EditText) findViewById(R.id.et_username);

        et_password = (EditText) findViewById(R.id.et_password);

        et_filename = (EditText) findViewById(R.id.et_file);

        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();

        StrictMode.setThreadPolicy(policy);

    }

    public void login(View view){

        String username = et_username.getText().toString();

        String password = et_password.getText().toString();

        String filename = et_filename.getText().toString();

        if (TextUtils.isEmpty(username)||TextUtils.isEmpty(password)) {

            Toast.makeText(this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();

        }else{

            String path = this.getResources().getString(R.string.requesturl);

            try {

            //    boolean result = service.loginByGet(path, username, password);

            //    boolean result = service.loginByPost(path, username, password);

            //    boolean result = service.loginHttpClientByGet(path, username, password);

            //  boolean result = service.loginHttpClientByPost(path, username, password);

                boolean result = service.fileUpload(path, username, password, filename);

                if (result) {

                    Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();

                }else{

                    Toast.makeText(this, "登录失败", Toast.LENGTH_SHORT).show();

                }

            } catch (Exception e) {

                e.printStackTrace();

                Toast.makeText(this, "登录失败", Toast.LENGTH_SHORT).show();

            }

        }

    }

}

MainActivity.java

package com.shellway.login.service;

import java.io.File;

import java.io.IOException;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLEncoder;

import java.util.ArrayList;

import java.util.List;

import org.apache.commons.httpclient.HttpException;

import org.apache.commons.httpclient.methods.PostMethod;

import org.apache.commons.httpclient.methods.multipart.FilePart;

import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;

import org.apache.commons.httpclient.methods.multipart.Part;

import org.apache.commons.httpclient.methods.multipart.StringPart;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

public class LoginService {

   /**

    * 普通的以GET方式与服务器进行交互

    * @param path 服务器连接路径

    * @param username 用户名

    * @param password 用户密码

    * @return

    * @throws Exception

    * @throws IOException

    */

   public boolean loginByGet(String path,String username,String password) {

        StringBuilder sb = new StringBuilder(path);

        try {

            sb.append("?").append("username=").append(URLEncoder.encode(username, "utf-8"));

            sb.append("&").append("password=").append(password);

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

            throw new RuntimeException("请输入正确的编码集");

        }

        String reqpath = sb.toString();

        System.out.println(reqpath);

        URL url;

        HttpURLConnection conn;

        try {

            url = new URL(reqpath);

            conn = (HttpURLConnection) url.openConnection();

            conn.setRequestMethod("GET");

            conn.setConnectTimeout(5000);

            if (conn.getResponseCode() == 200 ) {

                return true;

            }

        } catch (Exception e) {

            e.printStackTrace();

            throw new RuntimeException("连接网络失败");

        }

        return false;

   }

   /**

    * 普通的以POST方式与服务器进行交互

    * @param path 服务器连接路径

    * @param username 用户名

    * @param password 用户密码

    * @return

    * @throws Exception

    * @throws IOException

    */

   public boolean loginByPost(String path,String username,String password) throws Exception {

            StringBuilder sb = new StringBuilder();

            sb.append("username=").append(URLEncoder.encode(username,"utf-8")).append("&");

            sb.append("password=").append(password);

            byte[] entity = sb.toString().getBytes();

            URL url = new URL(path);

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestMethod("POST");

            conn.setConnectTimeout(5000);

            //设置实体参数

            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

            conn.setRequestProperty("Content-Length", entity.length+"");

            conn.setDoOutput(true);

            OutputStream os = conn.getOutputStream();

            os.write(entity);

            if (conn.getResponseCode() == 200 ) {

                return true;

            }

        return false;

    }

   /**

    * 通过第三方HttpClient来实现以GET方式与服务器进行连接

    * @param path 服务器连接路径

    * @param username 用户名

    * @param password 用户密码

    * @return

    * @throws Exception

    * @throws IOException

    */

   public boolean loginHttpClientByGet(String path,String username, String password) throws Exception, IOException{

       //拼请求路径

       StringBuilder sb = new StringBuilder(path);

       sb.append("?");

       sb.append("username=").append(URLEncoder.encode(username,"utf-8")).append("&");

       sb.append("password=").append(password);

       //1、得到浏览器

       HttpClient httpClient = new DefaultHttpClient();

       //2、指定请求方式

       HttpGet httpGet = new HttpGet(sb.toString());

       //3、执行请求

       HttpResponse response = httpClient.execute(httpGet);

       //4、得到响应码

       int code = response.getStatusLine().getStatusCode();

       if (code==200) {

        return true;

         }

       return false;

    }

   /**

    * 通过第三方HttpClient来实现以POST方式与服务器进行连接

    * @param path 服务器连接路径

    * @param username 用户名

    * @param password 用户密码

    * @return

    * @throws Exception

    * @throws IOException

    */

   public boolean loginHttpClientByPost(String path,String username, String password) throws Exception, IOException{

       //1、得到浏览器

       HttpClient httpClient = new DefaultHttpClient();

       //2、指定请求方式

       HttpPost httpPost = new HttpPost(path);

       //3、设置实体参数

       List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();

       nameValuePair.add(new BasicNameValuePair("username",username));

       nameValuePair.add(new BasicNameValuePair("password",password));

       //4、构建一个实体，并初始化参数

       UrlEncodedFormEntity entity = new UrlEncodedFormEntity(nameValuePair);

       //5、把实体数据设置到请求对象

       httpPost.setEntity(entity);

       //6、执行请求

       HttpResponse response = httpClient.execute(httpPost);

       //7、得到状态码

       int code = response.getStatusLine().getStatusCode();

       if (code==200) {

           return true;

       }

       return false;

   }

   /**

    * 通过第三方HttpClient来实现以POST方式的文件上传

    * @param path 服务器连接路径

    * @param username 用户名

    * @param password 用户密码

    * @param filename 客户端的上传文件(包含路径)

    * @return

    * @throws Exception

    * @throws IOException

    */

   public boolean fileUpload(String path,String username,String password,String filename) throws Exception, IOException{

       //1、获得浏览器

       org.apache.commons.httpclient.HttpClient httpClient = new org.apache.commons.httpclient.HttpClient();

       //2、确定请求方式

       PostMethod postMethod = new PostMethod(path);

       //3、确定请求的参数

       Part[] parts = new Part[]{new StringPart("username", username),

                                 new StringPart("password", password),

                                 new FilePart("file", new File(filename))};

       //4、构建实体

       MultipartRequestEntity entity = new MultipartRequestEntity(parts, postMethod.getParams());

       //5、设置请求实体

       postMethod.setRequestEntity(entity);

       //6、执行请求

       int responseCode = httpClient.executeMethod(postMethod);

       //7、得到响应码

       if(responseCode == 200){

           return true;

       }

       return false;

   }

}

LoginService.java

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

     >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="用户名" />

    <EditText

        android:id="@+id/et_username"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:hint="请输入用户名"

        />

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="密   码" />

    <EditText

        android:id="@+id/et_password"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:inputType="textPassword"

        android:hint="请输入密码"

        />

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="上传文件" />

    <EditText

        android:id="@+id/et_file"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:hint="请输入文件路径"

        />

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:onClick="login"

        android:text="登录"

        />

</LinearLayout>

activity.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.shellway.login.activity"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

   <uses-permission android:name="android.permission.INTERNET"/>

   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

   <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.shellway.login.activity.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

结果图：

java攻城狮之路(Android篇)--与服务器交互

3、电话号码归属地查询：
我们使用android server(webservice)
webservice就相当于网络上的api
手机号码归属地查询官网：http://www.webxml.com.cn/zh_cn/index.aspx

java攻城狮之路(Android篇)--与服务器交互

package com.shellway.addressqurey;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import com.shellway.service.QueryService;

import android.support.v7.app.ActionBarActivity;

import android.text.TextUtils;

import android.annotation.SuppressLint;

import android.os.Bundle;

import android.os.StrictMode;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    private EditText et_number;

    private TextView tv_info;

    private QueryService service;

    @SuppressLint("NewApi")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        service = new QueryService();

        et_number = (EditText) findViewById(R.id.et_number);

        tv_info = (TextView) findViewById(R.id.tv_info);

        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();

        StrictMode.setThreadPolicy(policy);

    }

    public void query(View view) {

        String number = et_number.getText().toString();

        if (TextUtils.isEmpty(number)) {

            Toast.makeText(this, "电话号码不能为空", Toast.LENGTH_SHORT).show();

        }else{

            String path = "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx";

            try {

                String contentXML = service.reqXML();

                String content = contentXML.replace("string", number);

                byte[] length = content.getBytes();

                URL url = new URL(path);

                HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                conn.setConnectTimeout(5000);

                conn.setRequestMethod("POST");

                conn.setRequestProperty("Content-Type","application/soap+xml; charset=utf-8");

                conn.setRequestProperty("Content-Length", length.length +"");

                conn.getDoOutput();

                OutputStream os = conn.getOutputStream();

                os.write(length);

                if (conn.getResponseCode()==200) {

                    InputStream is = conn.getInputStream();

                    String result = service.getNumber(is);

                    if (result!=null) {

                        tv_info.setText(result);

                    }

                    Toast.makeText(this, "查询成功", Toast.LENGTH_SHORT).show();

                }

            }catch (Exception e) {

                e.printStackTrace();

                Toast.makeText(this, "查询失败", Toast.LENGTH_SHORT).show();

            }

        }

    }

}

MainActivity.java

package com.shellway.service;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import org.xmlpull.v1.XmlPullParser;

import android.util.Xml;

//手机号码归属地查询官网：http://www.webxml.com.cn/zh_cn/index.aspx

public class QueryService {

    /**得到需要向服务器发送的信息

    POST /WebServices/MobileCodeWS.asmx HTTP/1.1

    Host: webservice.webxml.com.cn

    Content-Type: application/soap+xml; charset=utf-8

    Content-Length: length

    <?xml version="1.0" encoding="utf-8"?>

    <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">

      <soap12:Body>

        <getMobileCodeInfo xmlns="http://WebXml.com.cn/">

          <mobileCode>string</mobileCode>

          <userID>string</userID>

        </getMobileCodeInfo>

      </soap12:Body>

    </soap12:Envelope>

     */

    public String reqXML() throws Exception{

        //加载需要发送的内容信息

        InputStream is = this.getClass().getClassLoader().getResourceAsStream("request.xml");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        byte[] buffer = new byte[1024];

        int len = 0;

        while((len = is.read(buffer)) != -1){

            bos.write(buffer, 0, len);

        }

        bos.close();

        is.close();

        String reqContent = bos.toString();

        return reqContent;

    }

    /**从服务器发回的输入流中解析出里面我们需要的内容信息

    HTTP/1.1 200 OK

    Content-Type: application/soap+xml; charset=utf-8

    Content-Length: length

    <?xml version="1.0" encoding="utf-8"?>

    <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">

      <soap12:Body>

        <getMobileCodeInfoResponse xmlns="http://WebXml.com.cn/">

          <getMobileCodeInfoResult>string</getMobileCodeInfoResult>

        </getMobileCodeInfoResponse>

      </soap12:Body>

    </soap12:Envelope>

     */

    public String getNumber(InputStream is) throws Exception{

        //得到解析器

        XmlPullParser parser = Xml.newPullParser();

        //设置解析器

        parser.setInput(is, "utf-8");

        //得到事件类型

        int eventType = parser.getEventType();

        //开始解析

        while(eventType != XmlPullParser.END_DOCUMENT ){

            switch (eventType) {

            case XmlPullParser.START_TAG:

                if ("getMobileCodeInfoResult".equals(parser.getName())){

                    return parser.nextText();

                }

                break;

            default:

                break;

            }

            eventType = parser.next();

        }

        return null;

    }

}

QueryService.java

<?xml version="1.0" encoding="utf-8"?>

<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">

  <soap12:Body>

    <getMobileCodeInfo xmlns="http://WebXml.com.cn/">

      <mobileCode>string</mobileCode>

      <userID></userID>

    </getMobileCodeInfo>

  </soap12:Body>

</soap12:Envelope>

request.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

     >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="电话号码"

        />

    <EditText

        android:id="@+id/et_number"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:hint="请输入要查询的电话号码"

        />

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:onClick="query"

        android:text="查询"

        />

    <TextView

        android:id="@+id/tv_info"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="查询信息"

        />

</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.shellway.addressqurey"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

    <uses-permission android:name="android.permission.INTERNET"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

AndroidManifest.xml

结果截图：

java攻城狮之路(Android篇)--与服务器交互

总结：

Bitmap BitmapFactory
ScrollView

Http : URL HttpURLConnection conn 联网权限

xml
json

http get /post

HttpClient

文件上传

注意啦：本Android系列复习笔记后面会继续更新。。。。。。

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