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Spring教程-AOP

news 2026/6/6 11:31:47

需要新增的包 jdk21兼容spring版本

<?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>com.nhooo</groupId> <artifactId>spring-demo</artifactId> <version>1.0</version> <properties> <maven.compiler.source>21</maven.compiler.source> <maven.compiler.target>21</maven.compiler.target> </properties> <dependencies> <!-- Spring 5.x（支持 JDK 21） --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.3.39</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>5.3.39</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.3.39</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>5.3.39</version> </dependency> <!-- AspectJ 高版本 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.9.19</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.19</version> </dependency> <!-- 日志 --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency> </dependencies> </project>

1.注解

<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"></bean> 开启

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <bean id="aAOP" class="com.smr.demoAop.A"> </bean> <bean id="Alog" class="com.smr.demoAop.Alog"></bean> <bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"></bean> </beans>

package com.smr.demoAop; public class A { public void msg(){ System.out.println("msg method..."); } public int m(){ System.out.println("m method..."); return 2; } public int k(){ System.out.println("k method..."); return 3; } public void num(int age) throws Exception{ if(age<18){ throw new ArithmeticException("Not valid age"); }else{ System.out.println("正常1"); } } }

package com.smr.demoAop; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.*; @Aspect public class Alog { // @Pointcut("execution(* A.*(..))")//不管返回类型如何，它将应用于所有A类的所有方法 @Pointcut("execution(* A.m*(..))")//不管返回类型如何，它将应用于所有A类的m开头方法 public void advice(){ //System.out.println("Pointcut...."); } // @Before("advice()") //执行方法之前的操作 /** 结果 * k-satrt * myadvice-k-log.... * k method... */ // @After("advice()") /** * k-satrt * m method... * myadvice-k-log.... */ public void myadvice(JoinPoint jp) { System.out.println("myadvice-k-log...."); } //@AfterReturning(pointcut = "execution(* A.*(..))",returning = "result") /** * k-satrt * m method... * myadvice-k-log....start * int com.smr.demoAop.A.m() * 2 * myadvice-k-log....end */ public void myadvice(JoinPoint jp,Object result){ System.out.println("myadvice-k-log....start"); System.out.println(jp.getSignature()); System.out.println(result); //return 的结果 System.out.println("myadvice-k-log....end"); } //@Around("advice()") //必须要有返回值 方法前后执行 /** * k-satrt * myadvice-k-log....start * m method... * 2 * myadvice-k-log....end */ public Object myadvice(ProceedingJoinPoint jp) throws Throwable { System.out.println("myadvice-k-log....start"); Object ob= jp.proceed(); System.out.println(ob); System.out.println("myadvice-k-log....end"); return ob; } /** * 19 * k-satrt * 正常1 */ /** * 11 * k-satrt * myadvice-k-log....start * java.lang.ArithmeticException: Not valid age * myadvice-k-log....end */ @AfterThrowing(pointcut = "execution(* A.*(..))",throwing = "throwable") public void num(JoinPoint jp,Throwable throwable){ System.out.println("myadvice-k-log....start"); System.out.println(throwable); System.out.println("myadvice-k-log....end"); } }

package com.smr.demoAop; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class TestAOP { public static void main(String[] args) throws Exception { ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml"); A a=applicationContext.getBean("aAOP",A.class); System.out.println("k-satrt"); /** * k-satrt * myadvice-k-log....start * java.lang.ArithmeticException: Not valid age * myadvice-k-log....end */ // a.num(11); /** * k-satrt * 正常1 */ a.num(19); } }

2.xml文件

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <!--xml配置--> <bean id="b" class="com.smr.demoAop.B"></bean> <bean id="blog" class="com.smr.demoAop.Blog"></bean> <!--start myadvice-log.... m method... --> <!--Blog注入切面--> <aop:config> <aop:aspect id="basp" ref="blog"> <aop:pointcut id="aspbefore" expression="execution(* com.smr.demoAop.B.*(..))"/> <aop:before method="myadvice" pointcut-ref="aspbefore"></aop:before> </aop:aspect> </aop:config> <!-- start m method... myadvice-log.... --> <!-- <aop:config> <aop:aspect id="basp" ref="blog"> <aop:pointcut id="aspbefore" expression="execution(* com.smr.demoAop.B.*(..))"/> <aop:after method="myadvice" pointcut-ref="aspbefore"></aop:after> </aop:aspect> </aop:config>--> </beans>

package com.smr.demoAop; public class B { public void msg(){ System.out.println("msg method..."); } public int m(){ System.out.println("m method..."); return 2; } public int k(){ System.out.println("k method..."); return 3; } }

package com.smr.demoAop; import org.aspectj.lang.JoinPoint; public class Blog { public void myadvice(JoinPoint jp){ System.out.println("myadvice-log...."); } }

package com.smr.demoAop; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class TestB { public static void main(String[] args) { ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml"); B b=applicationContext.getBean("b",B.class); System.out.println("start"); b.m(); } }

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