SpringBoot之自定义简单的注解和AOP

1.引入依赖

<!-- AOP依赖-->
<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.9.8</version>
</dependency>

2.自定义一个注解

package com.example.springbootdemo3.annotation;import java.lang.annotation.*;@Target({ElementType.METHOD}) // 指定该注解可以加在方法上
@Retention(RetentionPolicy.RUNTIME) // 指定该注解在运行时保留，可以通过反射获取
@Documented // 表明该注解被包含在javadoc中
public @interface MyLog {/*** 名称*/String name() default "";
}

3.自定义AOP

package com.example.springbootdemo3.aop;import com.example.springbootdemo3.annotation.MyLog;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;/*** description* 自定义ControllerAOP** @author PC 2025/02/24 20:37*/
@Component
@Aspect
public class MyControllerAop {// 定义使用MyLog注解的方法为切入点@Pointcut("@annotation(com.example.springbootdemo3.annotation.MyLog)")private void pointCut() {}@Around("pointCut()") // 注解表示该方法是一个环绕通知（around advice），它会在指定的切入点（pointcut）执行前后进行增强处理。public Object around(ProceedingJoinPoint joinPoint) throws Throwable {// 获取倍增强调的类和方法信息MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();// 获取被增强的方法对象Method method = methodSignature.getMethod();// 获取被增强的方法上的注解if (method != null) {MyLog myLog = method.getAnnotation(MyLog.class);System.out.println("MyLog name:" + myLog.name());}// 方法名String name = method.getName();System.out.println("方法名：" + name);// 获取Request对象ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();HttpServletRequest request = servletRequestAttributes.getRequest();// 访问urlString url = request.getRequestURL().toString();System.out.println("访问url：" + url);// 请求方式String method1 = request.getMethod();System.out.println("请求方式：" + method1);// 请求参数String queryString = request.getQueryString();System.out.println("请求参数：" + queryString);// 请求IPSystem.out.println("请求IP：" + getClientIpAddress(request));Object proceed = joinPoint.proceed();System.out.println("返回值：" + proceed);return proceed;}/*** 方法：获取真实IP地址* 从常见的IP所在的请头中来获取** @param request* @return*/private String getClientIpAddress(HttpServletRequest request) {String ip = request.getHeader("X-Forwarded-For");if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("Proxy-Client-IP");}if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("WL-Proxy-Client-IP");}if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_CLIENT_IP");}if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_X_FORWARDED_FOR");}if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();}return ip;}
}

3.写个测试Controller试一下

package com.example.springbootdemo3.config;import com.example.springbootdemo3.annotation.MyLog;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.Map;/*** description** @author PC 2025/02/24 21:29*/
@RestController
@RequestMapping("/aop-test")
public class AopTestController {@PostMapping("/test")@MyLog(name = "aop测试")public String aopTest(@RequestBody Map map) {System.out.println(map);return "success";}
}

4.结束