springboot @Aspect用法_springboot aspect使用-优快云博客

本文链接：https://blog.youkuaiyun.com/caideb/article/details/87781277

本文详细介绍了如何在SpringBoot项目中使用AOP（面向切面编程）。通过具体示例，展示了如何配置pom文件引入依赖，创建Service层，定义AOP切面进行方法拦截，并在单元测试中验证AOP的效果。此教程适合初学者快速上手。

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1.pom文件

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.2.RELEASE</version>
	</parent>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- aop -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-aop</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
		</dependency>
	</dependencies>

2.Service

package com.knife.testaop;

import org.springframework.stereotype.Component;

@Component
public class TestService {
	
	public String test(String message){
		return "TestService->test : "+message;
	}
	
}

3.aop拦截

package com.knife.testaop;

import org.apache.log4j.Logger;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;


@Component
@Aspect
public class TestAop {
	
	private Logger log = Logger.getLogger(getClass());

	
	@Around("execution(* com.knife.testaop.TestService.*(..))")
	public Object doAroundAdvice(ProceedingJoinPoint proceedingJoinPoint) {
		
		log.info("#################aop:" + proceedingJoinPoint.getSignature().getName());
		
        //获取传入参数的值
		String param="";
		Object[] args = proceedingJoinPoint.getArgs();
		if(args.length>0){
			param=(String)args[0];
			log.info("###############origin param:"+param);
		}
		
        //修改返回参数的值
		try {
			return ((String)proceedingJoinPoint.proceed()).replace(param, "changed");
		} catch (Throwable e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
	}
	
}

4.测试

package com.knife.testaop;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = App.class)//这里的App是springboot的启动类名
@WebAppConfiguration
public class UnitTest {
	
	private Logger log = Logger.getLogger(getClass());

	@Autowired
	TestService testService;
	
	@Test
	public void test(){
		log.info(testService.test("testaop"));
	}
}

5.结果

2019-02-20 10:56:31.018  INFO 11796 --- [           main] com.knife.testaop.TestAop                : #################aop:test
2019-02-20 10:56:31.018  INFO 11796 --- [           main] com.knife.testaop.TestAop                : ###############origin param:testaop
2019-02-20 10:56:31.028  INFO 11796 --- [           main] com.knife.testaop.UnitTest               : TestService->test : changed