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

1 import lombok.Data;
2 
3 @Data
4 public class Person {
5 
6     private String name;
7 
8     private int age;
9 }

2.User类

1 import lombok.Data;
2 
3 import java.util.List;
4 
5 @Data
6 public class User {
7 
8     private List<Person> personList;
9 }

3.运行例子

 1 public static void main(String[] args) {
 2 
 3       
 5         String json = "{'name':'wyz','age':25}";
 6 
 7         Person person = new Gson().fromJson(json, Person.class);
 8 
 9         System.out.println(person);
10 
11         String json1 = "{'personList':[{'name':'wyz','age':25},{'name':'wyz1','age':26}]}";
12 
13         User user = new Gson().fromJson(json1, User.class);
14 
15         System.out.println(user);
16 
17         String json2 = "[{'name':'wyz','age':25},{'name':'wyz1','age':26}]";
18 
19         List<Person> personList = new Gson().fromJson(json2, new TypeToken<List<Person>>() {
20         }.getType());
21 
22         System.out.println(personList);
23     }

4.演示结果