Gson的fromJson()方法把json字符创转为实体

直接上代码：

1.先看Person实体类

import lombok.Data;

@Data
public class Person {

    private String name;

    private int age;
}

2.User类

import lombok.Data;

import java.util.List;

@Data
public class User {

    private List<Person> personList;
}

3.运行例子

public static void main(String[] args) {

      
        String json = "{'name':'wyz','age':25}";

        Person person = new Gson().fromJson(json, Person.class);

        System.out.println(person);

        String json1 = "{'personList':[{'name':'wyz','age':25},{'name':'wyz1','age':26}]}";

        User user = new Gson().fromJson(json1, User.class);

        System.out.println(user);

        String json2 = "[{'name':'wyz','age':25},{'name':'wyz1','age':26}]";

        List<Person> personList = new Gson().fromJson(json2, new TypeToken<List<Person>>() {
        }.getType());

        System.out.println(personList);
    }

4.演示结果