android 76 使用get post方式提交数据

时间：2022-02-08 21:27:16

get方式：

package com.itheima.getmethod;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLDecoder;

import java.net.URLEncoder;

import com.itheima.htmlviewer.utils.Utils;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    Handler handler = new Handler(){

        public void handleMessage(android.os.Message msg) {

            Toast.makeText(MainActivity.this, (String)msg.obj, 0).show();

        }

    };

    public void click(View v){

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

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

        final String name = et_name.getText().toString();

        final String pass = et_pass.getText().toString();

        Thread t = new Thread(){

            @Override

            public void run() {

                //提交的数据需要经过url编码(utf-8编码)，英文和数字编码后不变,如果是浏览器会自动编码，客户端要手动编码

                @SuppressWarnings("deprecation")

                String path = "http://192.168.13.13/Web2/servlet/LoginServlet?name=" + URLEncoder.encode(name) + "&pass=" + pass;

                try {

                    URL url = new URL(path);

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

                    conn.setRequestMethod("GET");

                    conn.setConnectTimeout(5000);

                    conn.setReadTimeout(5000);

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

                        InputStream is =conn.getInputStream();

                        String text = Utils.getTextFromStream(is);

                        Message msg = handler.obtainMessage();

                        msg.obj = text;

                        handler.sendMessage(msg);

                    }

                } catch (Exception e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

            }

        };

        t.start();

    }

}
package com.itheima.htmlviewer.utils;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

public class Utils {

    public static String getTextFromStream(InputStream is){

        byte[] b = new byte[1024];

        int len = 0;

        //创建字节数组输出流，读取输入流的文本数据时，同步把数据写入数组输出流

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        try {

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

                bos.write(b, 0, len);

            }

            //把字节数组输出流里的数据转换成字节数组

            String text = new String(bos.toByteArray());

            return text;

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return null;

    }

}

windowsmore编码是gbk,安卓默认编码是utf-8.

post方式：

package com.itheima.getmethod;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLDecoder;

import java.net.URLEncoder;

import com.itheima.htmlviewer.utils.Utils;

import com.itheima.postmethod.R;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    Handler handler = new Handler(){

        public void handleMessage(android.os.Message msg) {

            Toast.makeText(MainActivity.this, (String)msg.obj, 0).show();

        }

    };

    public void click(View v){

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

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

        final String name = et_name.getText().toString();

        final String pass = et_pass.getText().toString();

        Thread t = new Thread(){

            @Override

            public void run() {

                //提交的数据需要经过url编码，英文和数字编码后不变

                @SuppressWarnings("deprecation")

                String path = "http://192.168.13.13/Web2/servlet/LoginServlet";

                try {

                    URL url = new URL(path);

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

                    conn.setRequestMethod("POST");

                    conn.setConnectTimeout(5000);

                    conn.setReadTimeout(5000);

                    //拼接出要提交的数据的字符串

                    String data = "name=" + URLEncoder.encode(name) + "&pass=" + pass;

                    //添加post请求的两行属性

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

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

                    //设置打开输出流

                    conn.setDoOutput(true);

                    //拿到客户端像服务端的输出流

                    OutputStream os = conn.getOutputStream();

                    //使用输出流往服务器提交数据，

                    os.write(data.getBytes());//这个时候还没有产生网络交互数据

                    if(conn.getResponseCode() == 200){//建立连接，产生网络交互数据

                        InputStream is = conn.getInputStream();//得到服务器返回的输入流

                        String text = Utils.getTextFromStream(is);

                        Message msg = handler.obtainMessage();

                        msg.obj = text;

                        handler.sendMessage(msg);

                    }

                } catch (Exception e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

            }

        };

        t.start();

    }

}

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