fastjson

fastJson

下载地址：

​​https:///alibaba/fastjson/​​

fastjson主要的API哪些？

fastjson入口类是com.alibaba.fastjson.JSON，主要的API是JSON.toJSONString，和parseObject。

  package com.alibaba.fastjson;
  public abstract class JSON {
        public static final String toJSONString(Object object);
        public static final <T> T parseObject(String text, Class<T> clazz, Feature... features);
  }

序列化：

  String jsonString = JSON.toJSONString(obj);

反序列化：

  VO vo = JSON.parseObject("...", VO.class);

泛型反序列化：

  import com.alibaba.fastjson.TypeReference;

  List<VO> list = JSON.parseObject("...", new TypeReference<List<VO>>() {});

Samples DataBind

klioen edited this page on 19 Dec 2015 · ​​4 revisions​​

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Fastjson full support databind, it's simple to use.

Encode

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.addUser(guestUser);
group.addUser(rootUser);

String jsonString = JSON.toJSONString(group);

System.out.println(jsonString);

Output

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

Decode

String jsonString = ...;
Group group = JSON.parseObject(jsonString, Group.class);

Group.java

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) {
         = name;
    }

    public List<User> getUsers() {
        return users;
    }

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

        public void addUser(User user) {
            users.add(user);
        }
}

User.java

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) {
         = name;
    }
}