JSON和对象或集合间的转换

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

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); ?????// 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); ?}