生成JSON数据--Gson（谷歌）方法

红太狼 2022-06-16 04:24 228阅读 0赞

**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**

**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 + "]";
        }
    
    }