Gson生成JSON數據方法：

創建相應的類，然后創建對象，toJson()進去就可以了

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要求：生成如下JSON數據

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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第一題代碼：

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;}@Overridepublic String toString() {return "Person [age=" + age + ", name=" + name + "]";}}

獲得JSON數據

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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第二題代碼：

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;}@Overridepublic String toString() {return "Person [age=" + age + ", name=" + name + "]";}}

獲得JSON數據

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;}@Overridepublic String toString() {return "Employ [no=" + no + ", name=" + name + ", employees=" + employees + "]";}}

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