AspectJ 使用的一些注解

Myth丶恋晨 2022-05-30 10:24 238阅读 0赞

使用AspectJ时需要导入aspectjrt-1.8.13.jar和aspectjweaver-1.8.13.jar这两个jar包。

**Annotation方式使用AOP**

XML文件配置

<?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:context="http://www.springframework.org/schema/context"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd">
    
        <context:annotation-config/>
        <context:component-scan base-package="com"/>
        <aop:aspectj-autoproxy/>
    	
    
    </beans>

切入类定义

@Aspect  //定义这个类为切入类
    @Component
    public class LoginInterceptorAnnotation {
    	@Before("doPoint()")
    	public void doQian(JoinPoint joinPoint) {
    		System.out.println("方法开始前我执行了!");
    	}
    	
    	@After("execution(* com.samrtian.service.*.*(..))")
    	public void doHou() {
    		System.out.println("方法开始后我执行了!");
    	}
    	
    	@Around("doPoint()")  
    	public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
    		System.out.println("前");
    		Object retVal = pjp.proceed();
    		System.out.println("后");
            return retVal;
    	}
    	
    	//定义切入哪些方法
    	@Pointcut("execution(* com.samrtian.service.*.*(..))")
    	public void doPoint() {}
    }

@Aspect 定义类为切入类

@Pointcut 声明一个切入策略供 @Before @After @ 选择

@Before 被切入方法执行前执行

@After 被切入方法执行后执行

@Around 被切入方法前后都可以加入一些逻辑

@AfterReturning 被切入方法返回时执行

JoinPoint 加入这个参数可以获取被切入方法的名称和参数

**XML方式使用AOP**

XML文件配置

<?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:context="http://www.springframework.org/schema/context"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd">
    
        <context:annotation-config/>
    	<context:component-scan base-package="com"/>
    
    
    	<bean id="loginInterceptorAnnotation" class="com.samrtian.aop.LoginInterceptorAnnotation"/>
    	<aop:config>
    		<aop:aspect id="logInterceptor" ref="loginInterceptorAnnotation">
    			<aop:around method="doAround" pointcut="execution(* com.samrtian.service.*.*(..))"/>
    		</aop:aspect>
    	</aop:config>
    
    </beans>

代码

public class LoginInterceptorAnnotation {
    //	@Before("doPoint()")
    	public void doQian(JoinPoint joinPoint) {
    		System.out.println("方法开始前我执行了!");
    	}
    	
    //	@After("execution(* com.samrtian.service.*.*(..))")
    	public void doHou() {
    		System.out.println("方法开始后我执行了!");
    	}
    	
    //	@Around("doPoint()")  
    	public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
    		System.out.println("前");
    		Object retVal = pjp.proceed();
    		System.out.println("后");
            return retVal;
    	}
    	
    	//定义切入哪些方法
    	@Pointcut("execution(* com.samrtian.service.*.*(..))")
    	public void doPoint() {}
    }

基本上就这些了