1. pom.xml

<dependency>  
    <groupId>net.sf.json-lib</groupId>  
    <artifactId>json-lib</artifactId>  
    <version>2.4</version>  
    <classifier>jdk15</classifier>  
</dependency>  

2. JSON和對象/集合間的轉換

public static void main(String[] args) {
    User user 
 
= new User();  
    user.setNickname("aaaa");  
    user.setPswd("bbb");  
    List<User> userList = new ArrayList<User>();  
    userList.add(user);  
    // 對象 --> JSONObject / JSONArray  
    JSONObject jsonObject = JSONObject.fromObject(user);  
    System.out.println(jsonObject.toString());  
    JSONArray jsonArray 
 
= JSONArray.fromObject(userList);  
    System.out.println(jsonArray.toString());  
    // JSONObject --> 對象 / JSONArray --> 集合  
    User user2 = (User) JSONObject.toBean(jsonObject,User.class);  
    System.out.println(user2.getNickname());  
    User[] userArray = (User[]) JSONArray.toArray(jsonArray,User.class
 
);  
    System.out.println(userArray.length);  
}

JSON和對象或集合間的轉換