JSON之FastJson

 1 package test;
 2 import java.io.Serializable;
 3 /**
 4  * <一句话功能简述>
 5  * @author  aliger Email:liqimo#gmail.com
 6  * @version  [V1.00, 2014-8-16]
 7  * @see  [相关类/方法]
 8  * @since V1.00
 9  */
10 public class UserInfo implements Serializable{  
11     private String name;  
12     private int age;  
13     public void setName(String name){  
14      this.name=name;  
15     }  
16     public String getName(){  
17      return name;  
18     }  
19     public void setAge(int age){  
20      this.age=age;  
21     }  
22     public int getAge(){  
23      return age;  
24     }  
25 } 

 1 package test;
 2 import java.util.ArrayList;
 3 import java.util.Date;
 4 import java.util.HashMap;
 5 import java.util.List;
 6 import java.util.Map;
 7 import com.alibaba.fastjson.JSON;
 8 import com.alibaba.fastjson.TypeReference;
 9 import com.alibaba.fastjson.serializer.SerializerFeature;
10 /**
11  * <一句话功能简述>
12  *  
13  * @author  aliger Email:liqimo#gmail.com
14  * @version  [V1.00, 2014-8-16]
15  * @see  [相关类/方法]
16  * @since V1.00
17  */
18 public class TestOne
19 { 
20     public static FastJsonUtils ff;
21 
22      //public static void main(String[] args){
23     public static void test1(){
24           UserInfo info=new UserInfo(); 
25           info.setName("zhangsan"); 
26           info.setAge(24); 
27           //将对象转换为JSON字符串 
28           //String str_json=JSON.toJSONString(info); 
29           String str_json=ff.getJsonString(info);
30           System.out.println("JSON="+str_json); 
31      }
32      public static void test2() {  
33          
34          HashMap<String, Object> map = new HashMap<String, Object>();  
35          map.put("username", "zhangsan");  
36          map.put("age", 24);  
37          map.put("sex", "男");  
38          //map集合  
39          HashMap<String, Object> temp = new HashMap<String, Object>();  
40          temp.put("name", "xiaohong");  
41          temp.put("age", "23");  
42          map.put("girlInfo", temp);  
43          //list集合  
44          List<String> list = new ArrayList<String>();  
45          list.add("爬山");  
46          list.add("骑车");  
47          list.add("旅游");  
48          map.put("hobby", list);  
49          /*JSON 序列化，默认序列化出的JSON字符串中键值对是使用双引号，如果需要单引号的JSON字符串， [eg:String jsonString = JSON.toJSONString(map,   SerializerFeature.UseSingleQuotes);] 
50           *fastjson序列化时可以选择的SerializerFeature有十几个属性，你可以按照自己的需要去选择使用。  
51           */  
52          String jsonString = JSON.toJSONString(map);  
53          System.out.println("JSON===" + jsonString);  
54        }  
55      public static void test3(){  
56          String json="{\"name\":\"chenggang\",\"age\":24}";  
57          //反序列化  
58          UserInfo userInfo=JSON.parseObject(json,UserInfo.class);  
59          System.out.println("name:"+userInfo.getName()+", age:"+userInfo.getAge());  
60          }  
61         /**泛型的反序列化*/  
62         public static void test4(){  
63           String json="{\"user\":{\"name\":\"zhangsan\",\"age\":25}}";  
64           Map<String, UserInfo> map = JSON.parseObject(json, new TypeReference<Map<String, UserInfo>>(){});  
65           System.out.println(map.get("user"));
66          }  
67      public static void test5(){  
68          Date date=new Date();    
69          //输出毫秒值  
70          System.out.println(JSON.toJSONString(date));  
71          //默认格式为yyyy-MM-dd HH:mm:ss    
72          System.out.println(JSON.toJSONString(date, SerializerFeature.WriteDateUseDateFormat));  
73          //根据自定义格式输出日期   
74          System.out.println(JSON.toJSONStringWithDateFormat(date, "yyyy-MM-dd", SerializerFeature.WriteDateUseDateFormat));  
75        }  
76      public static void main(String[] args) {
77         test1();
78         test2();
79         test3();
80         test4();
81         test5();
82     }
83 }

1 JSON={"age":24,"name":"zhangsan"}
2 JSON==={"age":24,"girlInfo":{"age":"23","name":"xiaohong"},"hobby":["爬山","骑车","旅游"],"sex":"男","username":"zhangsan"}
3 name:chenggang, age:24
4 test.UserInfo@30c221
5 1408190003876
6 "2014-08-16 19:53:23"
7 "2014-08-16"