生成JSON数据--Gson（谷歌）方法

Gson生成JSON数据方法：

创建相应的类，然后创建对象，toJson()进去就可以了

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要求：生成如下JSON数据

1.{“age”:4,”name”:”zhagnsan”}

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

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第一题代码：

Person类

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 + "]"; } }

获得JSON数据

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); } }

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第二题代码：

Person类

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 + "]"; } }

获得JSON数据

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 + "]"; } }