JSON和对象或集合间的转换

1. pom.xml

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

2. JSON和对象/集合间的转换

public void test1(){    User user = new User();    user.setNickname("aaaa");    user.setPswd("bbb");    List<User> userList = new ArrayList<User>();    userList.add(user);    /*    对象 --> JSONObject / JSONArray     */    JSONObject jsonObject = JSONObject.fromObject(user);    System.out.println(jsonObject.toString());    JSONArray jsonArray = JSONArray.fromObject(userList);    System.out.println(jsonArray.toString());    /*    JSONObject --> 对象 / 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);}