fastjson的使用

这里介绍 fastjson 用于生成和解析 JSON 数据的简单示例
public class User {
    private Long id;
    private String name;

    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
}

public class Group {
    private Long id;
    private String name;
    private List<User> users = new ArrayList<User>();

    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }

    public List<User> getUsers() { return users; }
    public void setUsers(List<User> users) { this.users = users; }
}

import com.alibaba.fastjson.JSON;

Group group = new Group();
group.setId(0L);
group.setName("admin");

User guestUser = new User();
guestUser.setId(2L);
guestUser.setName("guest");

User rootUser = new User();
rootUser.setId(3L);
rootUser.setName("root");

group.getUsers().add(guestUser);
group.getUsers().add(rootUser);

String jsonString = JSON.toJSONString(group);

System.out.println(jsonString);

{
      "name":"admin",
      "id":0,"users":[
                             {"name":"guest","id":2},
                             {"name":"root","id":3}
                         ]
}

Group group2 = JSON.parseObject(jsonString, Group.class);