生成JSON資料--Gson（谷歌）方法

Gson生成JSON資料方法：

建立相應的類，然後建立物件，toJson()進去就可以了

---

要求：生成如下JSON資料

1.{“age”:4,”name”:”zhagnsan”}

2.{“no”:4,”name”:”zhangsan”,”employees”:[{“age”:3,”name”:”zhangsan”},{“age”:5,”name”:”lis”},{“age”:6,”name”:”wagw”}]}

---

第一題程式碼：

Person類

package com.qf.demo2;

public class Person {

    private int age;
    private String name;
    public Person(int age, String name) {
        super();
        this.age = age;
        this.name = name;
    }
    public Person() {
        super();
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Person [age=" + age + ", name=" + name + "]";
    }


}

獲得JSON資料

package com.qf.demo6;

import com.google.gson.Gson;
import com.qf.demo2.Person;

public class Test {

    public static void main(String[] args) {

        Gson gson = new Gson();

        Person person = new Person(4, "zhagnsan");

        String  json= gson.toJson(person);
        System.out.println(json);


    }
}

---

第二題程式碼：

Person類

package com.qf.demo2;

public class Person {

    private int age;
    private String name;
    public Person(int age, String name) {
        super();
        this.age = age;
        this.name = name;
    }
    public Person() {
        super();
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Person [age=" + age + ", name=" + name + "]";
    }


}

獲得JSON資料

package com.qf.demo6;

import java.util.ArrayList;

import com.google.gson.Gson;
import com.qf.demo2.Person;

public class Test3 {

    public static void main(String[] args) {

        ArrayList<Person> list = new ArrayList<>();
        list.add(new Person(3, "zhangsan"));
        list.add(new Person(5, "lis"));
        list.add(new Person(6, "wagw"));

        Employ employ = new Employ(4, "zhangsan", list);


        Gson gson = new Gson();
        String json = gson.toJson(employ);
        System.out.println(json);




    }
}

class Employ{
    private int no;
    private String name;
    private ArrayList<Person> employees;
    public Employ(int no, String name, ArrayList<Person> employees) {
        super();
        this.no = no;
        this.name = name;
        this.employees = employees;
    }
    public Employ() {
        super();
    }
    public int getNo() {
        return no;
    }
    public void setNo(int no) {
        this.no = no;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public ArrayList<Person> getEmployees() {
        return employees;
    }
    public void setEmployees(ArrayList<Person> employees) {
        this.employees = employees;
    }
    @Override
    public String toString() {
        return "Employ [no=" + no + ", name=" + name + ", employees=" + employees + "]";
    }

}