Gson和FastJson使用

Gson和FastJson使用

首先创建公共使用的类

import java.util.Objects;

public class Person {
    private String name;
    private int age;
    public Person() {

    }
    public Person(String name,int age) {
        this.name = name;
        this.age = 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 boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Person person = (Person) o;
        return age == person.age &&
                Objects.equals(name, person.name);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, age);
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

1、Gson的使用

//1、把对象转化为json字符串
import com.google.gson.Gson;
public class GsonTest {
    public static void main(String[] args) {
        Gson gson = new Gson();
        Person person = new Person("张三",12);
        String string = gson.toJson(person);
        System.out.println(string);
    }

}

//2、把json字符串转化为对象
import com.google.gson.Gson;
public class GsonTest2 {
    public static void main(String[] args) {
        String string  = "{\"name\":\"张三\",\"age\":12}";
        Gson gson = new Gson();
        Person p = gson.fromJson(string,Person.class);
        System.out.println(p);
    }
}

2、FastJson的使用

//1、把对象转化为json
import com.alibaba.fastjson.JSON;
public class FastJsonTest {
    public static void main(String[] args) {
        Person p = new Person("李四",25);
        String s = JSON.toJSONString(p);
        System.out.println(s);
    }
}

//2、把json字符串转化为对象
import com.alibaba.fastjson.JSON;
public class FastJsonTest2 {
    public static void main(String[] args) {
        String s = "{\"age\":25,\"name\":\"李四\"}";
        Person p = JSON.parseObject(s,Person.class);
        System.out.println(p);
    }
}