fastjson2使用

<!-- 阿里JSON解析器 -->
<dependency>
    <groupId>com.alibaba.fastjson2</groupId>
    <artifactId>fastjson2</artifactId>
    <version>${fastjson.version}</version>
</dependency>

import com.alibaba.fastjson2.JSON;
import lombok.Data;

public class test {
    public static void main(String[] args) {
        User user = new User();
        user.setUserId(1L);
        user.setUserName("小红");

        System.out.println(JSON.toJSONString(user));
    }
}

@Data
class User {
    private Long userId;
    private String userName;
}

import com.alibaba.fastjson2.JSON;
import lombok.Data;

public class test {
    public static void main(String[] args) {
        String str = "{\"userId\":1,\"userName\":\"小红\"}";

        System.out.println(JSON.parseObject(str));
    }
}

@Data
class User {
    private Long userId;
    private String userName;
}

import com.alibaba.fastjson2.JSON;
import lombok.Data;

public class test {
    public static void main(String[] args) {
        String str = "[{\"userId\":1,\"userName\":\"小红\"},{\"userId\":2,\"userName\":\"小明\"}]";

        System.out.println(JSON.parseArray(str).getJSONObject(1).getString("userName"));
    }
}

@Data
class User {
    private Long userId;
    private String userName;
}