android_json解析的服务端

1.User

2.JsonTools

package com.json.tools;

import net.sf.json.JSONObject;

public class JsonTools {

public JsonTools() {
// TODO Auto-generated constructor stub
}
/**
* @param key 表示json字符串的头信息
* @param object 是对解析的集合的类开题
* @return
*/
public static String createJsonString(String key,Object value){
JSONObject jsonObject=new JSONObject();
jsonObject.put(key, value);
return jsonObject.toString();

}

}

3.JsonService

package com.json.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.json.domain.User;

public class JsonService {

public JsonService() {
// TODO Auto-generated constructor stub
}
public User getUser(){
User user=new User(1001, "jack", 32);
return user;
}
public List<User> getListUser(){
List<User> list=new ArrayList<User>();
User user1=new User(1001, "jack", 32);
User user2=new User(1002, "rose", 31);
list.add(user1);
list.add(user2);
return list;
}
public List<String> getListString(){
List<String> list=new ArrayList<String>();
list.add("上海");
list.add("北京");
list.add("广州");
return list;

}
public List<Map<String,Object>> getListMaps(){
List<Map<String,Object>> list=new ArrayList<Map<String,Object>>();
Map<String,Object> map1=new HashMap<String, Object>();

map1.put("id", 1001);
map1.put("name", "jack");
map1.put("age", 32);

Map<String,Object> map2=new HashMap<String, Object>();

map2.put("id", 1002);
map2.put("name", "rose");
map2.put("age", 31);
list.add(map1);
list.add(map2);
return list;

}

}

4.JsonAction

package com.json.action;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.json.service.JsonService;
import com.json.tools.JsonTools;

public class JsonAction extends HttpServlet {
private JsonService service;

/**
* Constructor of the object.
*/
public JsonAction() {
super();
}

/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

this.doPost(request, response);
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
/*String jsonString=JsonTools.createJsonString("user", service.getUser());*/
String jsonString="";
String action_flag=request.getParameter("action_flag");
if(action_flag.equals("user")){
jsonString=JsonTools.createJsonString("user", service.getUser());
}else if(action_flag.equals("users")){
jsonString=JsonTools.createJsonString("users", service.getListUser());
}else if(action_flag.equals("listString")){
jsonString=JsonTools.createJsonString("listString", service.getListString());
}else if(action_flag.equals("listmap")){
jsonString=JsonTools.createJsonString("listmap", service.getListMaps());
}
out.println(jsonString);
out.flush();
out.close();
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
service=new JsonService();
}

}

5.JsonTest

package com.json.test;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.json.domain.User;
import com.json.service.JsonService;
import com.json.tools.JsonTools;

public class JsonTest {

public JsonTest() {
// TODO Auto-generated constructor stub
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String msg="";
String msg1="";
String msg2="";
String msg3="";
JsonService jsonService=new JsonService();
User user=jsonService.getUser();
msg=JsonTools.createJsonString("user", user);

List<User> list=jsonService.getListUser();
msg1=JsonTools.createJsonString("user",list);

List<String> list1=jsonService.getListString();
msg2=JsonTools.createJsonString("user", list1);

List<Map<String, Object>> list2=jsonService.getListMaps();
msg3=JsonTools.createJsonString("user", list2);
System.out.println(msg);
System.out.println(msg1);
System.out.println(msg2);
System.out.println(msg3);

}

}

6.其输出结果：

{"user":{"age":32,"id":1001,"name":"jack"}}

{"user":[{"age":32,"id":1001,"name":"jack"},{"age":31,"id":1002,"name":"rose"}]}

{"user":["上海","北京","广州"]}

{"user":[{"id":1001,"age":32,"name":"jack"},{"id":1002,"age":31,"name":"rose"}]}

源码