把json数据转化成对象

 1 package com.lxj.register;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 import java.net.MalformedURLException;
 7 import java.net.URL;
 8 
 9 import net.sf.json.JSONObject;
10 
11 public class Demo {
12     public static void main(String[] args) {
13         try {
14             // 创建URL连接到服务器
15             URL url = new URL("http://192.168.18.249:8080/order/register");
16             try {
17                 // 创建输入流
18                 BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
19                 StringBuffer sb = new StringBuffer();
20                 String st ;
21                 // 开始接受数据，先接受到st中
22                 while((st = br.readLine()) != null){
23                     // 再拼接到sd中
24                     sb.append(st);
25                 }
26                 // 打印出所有的数据
27                 System.out.println(sb.toString());
28                 // JSONObject.toBean()把JSONObject转化成Register对象
29                 // JSONObject.fromObject(sb.toString()把sb.toString字符串转化为JsonObject
30                 // Register.class意思是转化成Register
31                 Register register = (Register) JSONObject.toBean(JSONObject.fromObject(sb.toString()),Register.class);
32                 // 服务器的数据存入了Register对象中，只要register调用就可以了
33                 System.out.println("msg:"+register.getMsg());
34                 System.out.println("retCode:"+register.getRetCode());
35                 System.out.println("姓名:"+register.getInfo().getName());
36                 System.out.println("性别:"+register.getInfo().getSex());
37             } catch (IOException e) {
38                 // TODO Auto-generated catch block
39                 e.printStackTrace();
40             }
41         } catch (MalformedURLException e) {
42             // TODO Auto-generated catch block
43             e.printStackTrace();
44         }
45     }
46 }

 1 package com.lxj.register;
 2 
 3 public class Register {
 4     private String msg;
 5     private String retCode;
 6     private Info info;
 7     
 8     // 生成set get 方法
 9     public String getMsg() {
10         return msg;
11     }
12 
13 
14     public void setMsg(String msg) {
15         this.msg = msg;
16     }
17 
18 
19     public String getRetCode() {
20         return retCode;
21     }
22 
23 
24     public void setRetCode(String retCode) {
25         this.retCode = retCode;
26     }
27 
28 
29     public Info getInfo() {
30         return info;
31     }
32 
33 
34     public void setInfo(Info info) {
35         this.info = info;
36     }
37 
38     // 把Info创建成内部类，外部类可以直接调用
39     public static class Info {
40         private String name;
41         private String sex;
42         public String getName() {
43             return name;
44         }
45         public void setName(String name) {
46             this.name = name;
47         }
48         public String getSex() {
49             return sex;
50         }
51         public void setSex(String sex) {
52             this.sex = sex;
53         }
54         
55     }
56 }