package ivyy.taobao.com.domain.gson;
import ivyy.taobao.com.utils.IoUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
import com.google.gson.Gson;
import com.google.gson.stream.JsonReader;
/**
*@DEMO:json
*@Author:jilongliang
*@Date:2013-7-20
*/
public class JsonRead {
private static Gson gson=new Gson();
/**
* @param args
*/
public static void main(String[] args) throws Exception{
getJsonData();//读取数据
String pathname=JsonRead.class.getClassLoader().getResource("doc/json.json").getPath();;
InputStream input = new FileInputStream(new File(pathname));
//String flag="m";//方法一
String flag="input";//方法二
String content=IoUtils.reader(pathname);
if(flag.equals("m")){
readJsonData(input,content);
}else if(flag.equals("input")){
readJsonData(input,flag);
}
}
/**
* 组装Json数据
* @throws Exception
*/
private static void getJsonData() throws Exception {
/**
* 组装address对象的数据
*/
Map<String, String> address = new HashMap <String, String>();
address.put("province", "广东省");
address.put("city", "云浮市");
address.put("district", "云城区");
address.put("street", "云城区闻莺路东升布艺");
/**
* 组装users对象的数据
*/
Map<String, String> users = new HashMap <String, String>();
users.put("username", "liangjilong");
users.put("age", "25");
users.put("tel", "1361111111");
users.put("email", "jilongliang@sina.com");
Map<Object, Object> listsObj = new HashMap <Object, Object>();
listsObj.put("address",address);//address节点
listsObj.put("users",users);//users节点
Object obj=listsObj;//转换成对象
Map<Object, Object> info = new HashMap <Object, Object>();
info.put("info", obj);//json的根节点
String json=gson.toJson(info);//转换成json数据
System.out.println(json);//打印json数据
readJsonData(null,json);
}
/**
* 从文件读取json数据
* @param in 输入流
* @throws Exception
*/
public static void readJsonData(InputStream in,String jsonFrom) throws Exception {
JsonReader reader=null;
if(jsonFrom.equals("input")){
reader = new JsonReader(new InputStreamReader(in, "gbk"));
}else{
reader = new JsonReader(new StringReader(jsonFrom));
}
try {
reader.beginObject();
String tagName = reader.nextName();
if (tagName.equals("info")) {
readInfo(reader);
}
reader.endObject();
} finally {
reader.close();
}
}
/**
* 读取json的父(根,第一个)节点
* @param reader
* @throws Exception
*/
public static void readInfo(JsonReader reader) throws Exception {
reader.beginObject();
while (reader.hasNext()) {
String tagName = reader.nextName();
if (tagName.equals("address")) {
readAddress(reader);
} else if (tagName.equals("users")) {
readUsers(reader);
}
}
reader.endObject();
}
/**
* 读取用户信息值
* @param reader
* @throws IOException
*/
public static void readUsers(JsonReader reader) throws IOException {
reader.beginObject();
while (reader.hasNext()) {
String tag = reader.nextName();
if (tag.equals("username")) {
String username = reader.nextString();
System.out.println("用户名:" + username);
} else if (tag.equals("email")) {
String email = reader.nextString();
System.out.println("Email:" + email);
} else if (tag.equals("tel")) {
String tel = reader.nextString();
System.out.println("电话:" + tel);
}else if (tag.equals("age")) {
String age = reader.nextString();
System.out.println("年龄:" + age);
} else {
reader.skipValue();//忽略值/跳过break
}
}
reader.endObject();
}
/**
* 读取地区值
* @param reader
* @throws IOException
*/
public static void readAddress(JsonReader reader) throws IOException {
reader.beginObject();
while (reader.hasNext()) {
String tag = reader.nextName();
if (tag.equals("province")) {
String province = reader.nextString();
System.out.println("省份:" + province);
} else if (tag.equals("city")) {
String city = reader.nextString();
System.out.println("街道:" + city);
} else if (tag.equals("street")) {
String street = reader.nextString();
System.out.println("街道:" + street);
}else if (tag.equals("district")) {
String district = reader.nextString();
System.out.println("区:" + district);
} else {
reader.skipValue();//忽略值/跳过break
}
}
reader.endObject();
}
}
package ivyy.taobao.com.utils;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileOutputStream;import java.io.FileReader;import java.io.OutputStreamWriter;import java.io.Writer;/** *@Author:liangjilong *@Date:2015-1-5 *@Version:1.0 *@Description: */public class IoUtils {/** * 读文件流 * * @param formPath从哪里读取的文件路径 * @return */public static String reader(String formPath) {String content="";FileReader read = null;BufferedReader reader = null;try {read = new FileReader(new File(formPath));reader = new BufferedReader(read);StringBuffer buffer = new StringBuffer("");content = reader.readLine();while (content != null) {buffer.append(content).append("\n");content = reader.readLine();}return content = buffer.toString();// 返回} catch (Exception e) {e.printStackTrace();} finally {try {if (reader != null)reader.close();if (read != null)read.close();} catch (Exception e) {e.printStackTrace();}}return "";// 没值就返回空}/** * 处理文件写 * @param content * @param htmlPath * @return */public static boolean write(String content, String htmlPath) { boolean flag = true; try { Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlPath), "utf-8")); out.write("\n" + content); out.close(); } catch (Exception ex) { ex.printStackTrace(); return false; } return flag; } }
{
"info": {
"users": {
"username": "东升布艺",
"email": "jilongliang@sina.com",
"tel": "111111111",
"age": "25"
},
"address": {
"street": "云城区闻莺路东升布艺",
"province": "广东省",
"district": "云城区",
"city": "云浮市"
}
}
}
