FastJson使用

1.导入：

compile 'com.alibaba:fastjson:1.2.41'

2.使用：

public class User {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

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

    @Override
    public String toString() {
        return "User [name=" + name + ", age=" + age + "]";
    }
}

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

    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;
    }

    @Override
    public String toString() {
        return "UserGroup [name=" + name + ", users=" + users + "]";
    }

}

代码实例：

 User guestUser = new User();
        guestUser.setName(null);
        guestUser.setAge(28);
        // 构建用户root
        User rootUser = new User();
        rootUser.setName("root");
        guestUser.setAge(35);
        // 构建用户组对象
        UserGroup group = new UserGroup();
        group.setName(null);
        group.getUsers().add(guestUser);
        group.getUsers().add(rootUser);
        // 用户组对象转JSON串
        String jsonString = JSON.toJSONString(group);
        Log.e("Demo12Activity","jsonString:" + jsonString);
        // JSON串转用户组对象
        UserGroup group2 = JSON.parseObject(jsonString, UserGroup.class);
        Log.e("Demo12Activity","group:"+group2);

        // 构建用户对象数组
        User[] users = new User[2];
        users[0] = guestUser;
        users[1] = rootUser;
        // 用户对象数组转JSON串
        String jsonString2 = JSON.toJSONString(users);
        System.out.println("jsonString2:" + jsonString2);
        // JSON串转用户对象列表
        List<User> users2 = JSON.parseArray(jsonString2, User.class);
        Log.e("Demo12Activity","users2:" + users2);

        User user1 = users2.get(0);
        Log.e("Demo12Activity","user1:" + user1.getName());

 运行结果：

jsonString:{"users":[{"age":35},{"age":0,"name":"root"}]}

group:UserGroup [name=null, users=[User [name=null, age=35], User [name=root, age=0]]]

users2:[User [name=null, age=35], User [name=root, age=0]]

user1:null