JAVA的JSON数据包装-博客园老牛大讲

 1 package Entity;
 2 
 3 public class User 
 4 {
 5     private int id;
 6     private String username;
 7     private String  password;
 8     public User(){
 9         
10     }
11     public User(int id,String username,String pasword){
12         
13     }
14     public int getId() {
15         return id;
16     }
17     public void setId(int id) {
18         this.id = id;
19     }
20     public String getUsername() {
21         return username;
22     }
23     public void setUsername(String username) {
24         this.username = username;
25     }
26     public String getPassword() {
27         return password;
28     }
29     public void setPassword(String password) {
30         this.password = password;
31     }
32 }

 1 package JsonTools;
 2 
 3 
 4 import java.util.List;
 5 
 6 import net.sf.json.JSONObject;
 7 
 8 public class JsonToos 
 9 {
10     //返回一个结果的json数据
11     public String returnResult(String value)
12     {     
13          JSONObject jsonObject=new JSONObject();  
14          jsonObject.put("code", value);  
15          return jsonObject.toString();  
16     } 
17     
18     //把list数据包装成json数据
19     public String returnListJSON(String key,Object value)
20     {
21         JSONObject jsonObject=new JSONObject();  
22         jsonObject.put(key,value);  
23         return jsonObject.toString();
24     }
25 }

 1 package Server;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 import java.util.ArrayList;
 6 import java.util.List;
 7 
 8 import javax.servlet.ServletException;
 9 import javax.servlet.http.HttpServlet;
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12 
13 import com.sun.net.httpserver.HttpContext;
14 
15 import Entity.User;
16 import JsonTools.JsonToos;
17 
18 public class B extends HttpServlet {
19     private JsonToos jsonToos=new JsonToos();
20     public void doGet(HttpServletRequest request, HttpServletResponse response)
21     throws ServletException, IOException {
22         doPost(request,response);
23     }
24 
25     public void doPost(HttpServletRequest request, HttpServletResponse response)
26     throws ServletException, IOException {
27 
28         String  callback = request.getParameter("callback");  
29         
30         String jsonstring=jsonToos.returnResult("110");
31         
32         String jsoncallback = callback + "("+jsonstring+")";  
33         PrintWriter out =  response.getWriter();  
34         out.print(jsoncallback);  
35         out.flush();  
36         out.close(); 
37     
38     }
39 }