使用aop实现自定义注解

先发效果图

拿到对应的字段

 pom依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>order-service</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><java.version>1.8</java.version><skipTests>true</skipTests></properties><!-- 继承 Spring Boot 父 POM，管理 Spring Boot 依赖版本 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.18</version><relativePath/> <!-- 从仓库查找父 POM --></parent><dependencies><!-- Spring Boot 核心依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><!--tomcat容器--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--lombok依赖--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.26</version></dependency><!--springboot整合aop--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-aop</artifactId></dependency><!--添加fastjson依赖--><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.83</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><version>3.1.0</version><configuration><encoding>UTF-8</encoding></configuration></plugin><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><!--热部署配置--><configuration><!--fork:如果没有该项配置,整个devtools不会起作用--><fork>true</fork></configuration></plugin></plugins><finalName>video</finalName></build></project>

　　配置文件

server.port=20013

　　代码部分

import java.lang.annotation.*;@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface GetPostParams {String value() default "";
}package com.order.video.config;import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestBody;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;/*** @Description:* @Author: tutu-qiuxie* @Create: 2026/2/26 15:35*/
@Aspect
@Component
@Slf4j
public class PostParamAspect {@Around("@annotation(getPostParams)")public Object around(ProceedingJoinPoint joinPoint, GetPostParams getPostParams) throws Throwable {Object[] args = joinPoint.getArgs();if (args.length > 0 && args[0] != null) {BeanWrapper wrapper = new BeanWrapperImpl(args[0]);if (wrapper.isReadableProperty("id")) {Object id = wrapper.getPropertyValue("id");log.info("id = {}", id);}}return joinPoint.proceed();}
}

　　实体类

import lombok.Data;/*** @Description:* @Author: tutu-qiuxie* @Create: 2026/2/26 15:50*/
@Data
public class UserDTO {private Long id;private Integer age;private String name;
}

　　接口

import com.order.UserDTO;
import com.order.video.config.GetPostParams;
import org.springframework.web.bind.annotation.*;/*** @Description:* @Author: tutu-qiuxie* @Create: 2026/2/26 15:34*/
@RestController
@RequestMapping("/test")
public class TestController {@PostMapping("/save")@GetPostParamspublic String save(@RequestBody UserDTO userDTO) {return "ok";}
}

　　启动类

package com.order;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** @Description:* @Author: tutu-qiuxie* @Create: 2025/12/29 21:45*/
@SpringBootApplication
public class OrderApplication {public static void main(String[] args) {SpringApplication.run(OrderApplication.class,args);}}

　　请求参数

127.0.0.1:20013/test/save{"id": 1,"age": 20
}

　　以上的实现主要借助了aop的原理