把user对象里面的数据解析成json格式

package com.json.parse;

import java.util.*;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.bean.User;

public class UserGeneJson {
  public static void main(String[] args) {
    List<User> userlist = generateList();
    System.out.println(listToJson(userlist));
  }

  private static String listToJson(List<User> userlist) {
    JSONArray jsonArray = new JSONArray();

    for (User user : userlist) {
      JSONObject jsonObject = new JSONObject();
      // 向jsonObject添加属性对
      jsonObject.accumulate("age", user.getAge());
      jsonObject.accumulate("username", user.getUsername());
      jsonObject.accumulate("password", user.getPassword());
      
      // 使用JSONArray存放favoriteList
      List<String> favoriteList = user.getFavoriteList();
      
      JSONArray favoriteArray = new JSONArray();
      for (String favotite : favoriteList) {
        favoriteArray.add(favotite);
      }
      
      jsonObject.accumulate("favoriteList", favoriteArray);

      // 将jsonObject放入jsonArray
      jsonArray.add(jsonObject);
      
    }

    return jsonArray.toString();
  }

  private static List<User> generateList() {
    List<User> userList = new ArrayList<User>();

    List<String> favoriteList = new ArrayList<String>();
    favoriteList.add("美食");
    favoriteList.add("美酒");
    favoriteList.add("美景");
    favoriteList.add("美女");

    userList.add(new User(18, "周义", "admin", favoriteList));
    userList.add(new User(28, "老王", "admin", favoriteList));
    userList.add(new User(38, "老周", "admin", favoriteList));

    return userList;
  }
}

package com.bean;

import java.util.List;
import java.util.Map;

public class User {
  private int age;
  private String username;
  private String password;
  private List<String> favoriteList;
  private Map<Integer, String> feeling;

  public User(int age, String username, String password,
      List<String> favoriteList) {
    super();
    this.age = age;
    this.username = username;
    this.password = password;
    this.favoriteList = favoriteList;
  }
  
  public User(int age, String username, String password,
      List<String> favoriteList, Map<Integer, String> feeling) {
    super();
    this.age = age;
    this.username = username;
    this.password = password;
    this.favoriteList = favoriteList;
    this.feeling = feeling;
  }
  
  public Map<Integer, String> getFeeling() {
    return feeling;
  }

  public void setFeeling(Map<Integer, String> feeling) {
    this.feeling = feeling;
  }

  public User() {
    super();
  }

  public int getAge() {
    return age;
  }

  public void setAge(int age) {
    this.age = age;
  }

  public String getUsername() {
    return username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }

  public List<String> getFavoriteList() {
    return favoriteList;
  }

  public void setFavoriteList(List<String> favoriteList) {
    this.favoriteList = favoriteList;
  }

  @Override
  public String toString() {
    return "User [age=" + age + ", username=" + username + ", password="
        + password + ", favoriteList=" + favoriteList + ", feeling="
        + feeling + "]";
  }

}