步驟：
1.導(dǎo)入坐標(biāo)

<dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.0.5.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.0.5.RELEASE</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.4</version></dependency>

2.創(chuàng)建目標(biāo)類和接口（內(nèi)部有切點）

public interface TargetInterface {public void save(); } @Component public class Target implements TargetInterface{public void save() {System.out.println("save running....");} }

3.創(chuàng)建切面類（內(nèi)部有增強(qiáng)方法）

@Component @Aspect //標(biāo)注當(dāng)前aspect是切面類 public class MyAspect {//配置織入關(guān)系 value=切點表達(dá)式@Before(value = "execution(public void com.hao.anno.Target.save())")public void before(){System.out.println("前置增強(qiáng)...");}public void afterReturning(){System.out.println("后置增強(qiáng)...");}public Object around(ProceedingJoinPoint point) throws Throwable { //切入點System.out.println("環(huán)繞前增強(qiáng)...");//切點方法Object proceed = point.proceed();System.out.println("環(huán)繞后增強(qiáng)...");return proceed;} }

4.將目標(biāo)類和切面類的對象創(chuàng)建權(quán)交給spring
5.在切面類中使用注解配置織入關(guān)系
第三步和第二步已經(jīng)實現(xiàn)
6.在配置文件中開啟組件掃描和aop自動代理

<?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"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"><!-- 組件掃描--><context:component-scan base-package="com.hao.anno"></context:component-scan><!-- aop自動代理--><aop:aspectj-autoproxy/> </beans>

7.測試

@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContextanno.xml") public class AnnoTest {@Autowiredprivate TargetInterface target;@Testpublic void test2(){target.save();}}

結(jié)果：
前置增強(qiáng)…
save running…

總結(jié)

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