spring框架AOP配置

左手的ㄟ右手 2022-05-14 16:09 181阅读 0赞

第一步：导入包  
aopalliance-1.0.jar  
aspectjweaver-1.8.13.jar  
spring-aop-3.2.13.RELEASE.jar

spring开头的包自带的有  
aopalliance,aspectjweaver去https://repo.spring.io/下载  
还加上ioc的5个包：

commons-logging-1.2.jar  
spring-beans-3.2.13.RELEASE.jar  
spring-context-3.2.13.RELEASE.jar  
spring-core-3.2.13.RELEASE.jar  
spring-expression-3.2.13.RELEASE.jar

第二步：配置ApplicationContext.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"
    	   xmlns:context="http://www.springframework.org/schema/context"
    	   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-3.2.xsd
    			http://www.springframework.org/schema/aop
    			http://www.springframework.org/schema/aop/spring-aop.xsd">
    			
    	
    	<bean id="usLogger" class="com.big3.aop.UserServiceLogger"/>
    	
    	<aop:config>
    		
    		<aop:pointcut id="pointcut" expression="execution(public void eat(com.big3.pojo.User))"/>
    		
    		<aop:aspect ref="usLogger">
    			 
    			<aop:before method="before" pointcut-ref="pointcut"/>
    			 
    			<aop:after-returning method="afterReturning" pointcut-ref="pointcut" returning="result"/>
    		</aop:aspect>
    	</aop:config>
    
    	<bean id="errorLogger" class="com.big3.aop.ErrorLogger"/>
    	
    	<aop:config>
    		
    		<aop:pointcut id="point" expression="execution(public void save(com.big3.pojo.User))"/>
    		
    		<aop:aspect ref="errorLogger">
    			
    			<aop:after-throwing method="afterThrowing" pointcut-ref="point" throwing="e"/>
    		</aop:aspect>
    	</aop:config>
    
    	<bean id="afterLogger" class="com.big3.aop.AfterLogger"  />
    	
    	<aop:config>
    		
    		<aop:pointcut id="points" expression="execution(public void eat(int ,String))"/>
    		
    		<aop:aspect ref="afterLogger">
    			
    			<aop:after method="after" pointcut-ref="points"/>
    		</aop:aspect>
    	</aop:config>
    
    	<bean id="aroundLogger" class="com.big3.aop.AroundLogger"/>
    	
    	<aop:config>
    		
    		<aop:pointcut id="pointse" expression="execution(public int saves(com.big3.pojo.User))"/>
    		<aop:aspect ref="aroundLogger">
    			<aop:around method="aroundLogger" pointcut-ref="pointse"/>
    		</aop:aspect>
    	</aop:config>
    </beans>

如果用注解配置文件如下：

**注意：如果用了spring mvc框架，IOC,AOP需要配置在springmvc配置文件里**

<context:component-scan base-package="cn.kgc.service,cn.kgc.pojo,cn.kgc.service.impl,cn.kgc.controller,cn.kgc.aop"/>
    
     <aop:aspectj-autoproxy/>

第三步：JAVA应用，如果不用注解，就不用注解标示

日志增强

@Aspect
    @Component("usLogger")
    public class UserServiceLogger {
    	private static Logger log=Logger.getLogger(UserServiceLogger.class);
    	//定义切入点方法
    	@Pointcut("execution(public void eat(com.big3.pojo.User))")
    	public void pointcut(){}
    
    	//前置增强
    	@Before("pointcut()")
    	public void before(JoinPoint jp){
    		log.info("调用"+jp.getTarget()+"的"+jp.getSignature()+"方法，方法参数：\"+Arrays.toString(jp.getArgs()));\n" +
    				"\t}"+Arrays.toString(jp.getArgs()));
    	}
    
    	//后置增强
    	@AfterReturning(pointcut="pointcut()",returning="result")
    	public void afterReturning(JoinPoint jp,Object result){
    		log.info("调用"+jp.getTarget()+"的"+jp.getSignature()+"方法，方法返回值："+result);
    	}

异常增强

@Aspect //增强处理
    @Component("errorLogger")
    public class ErrorLogger {
        private static Logger log=Logger.getLogger(UserServiceLogger.class);
    
        //定义切入点方法
        @Pointcut("execution(public void save(com.big3.pojo.User))")
        public void pointcut(){}
        
        //定义异常增强方法
        @AfterThrowing(pointcut="pointcut()",throwing="e")
        public void afterThrowing(JoinPoint jp,RuntimeException e){
            log.error(jp.getSignature().getName()+"方法发生异常,"+e);
        }
    }

最终增强

//最终增强，不管是否发生异常都执行，用于释放资源
    @Aspect //增强处理
    @Component("afterLogger")
    public class AfterLogger {
        private static Logger log=Logger.getLogger(UserServiceLogger.class);
    
        //定义切入点方法
        @Pointcut("execution(public void eat(int ,String))")
        public void pointcut(){}
    
        //定义最终增强方法
        @After("pointcut()")
        public void after(JoinPoint jp){
            log.info(jp.getSignature().getName()+"方法结束了");
        }
    }

环绕增

//环绕增强
    @Aspect //增强处理
    @Component("aroundLogger")
    public class AroundLogger {
        private static final Logger log=Logger.getLogger(AroundLogger.class);
    
        //定义环绕增强方法
        @Around("execution(public int saves(com.big3.pojo.User))")
        public Object aroundLogger(ProceedingJoinPoint jp)throws Throwable{
            User user=(User)jp.getArgs()[0];
            log.info("调用"+jp.getTarget()+"的"+jp.getSignature().getName()+"方法。方法入参"+user.getName());
            try {
                int result=(int)jp.proceed();//执行目标方法并获得返回值
                log.info("调用"+jp.getTarget()+"的"+jp.getSignature().getName()+"方法。方法返回值"+(result+200));
                return result;
            } catch (Throwable throwable) {
                log.error(jp.getSignature().getName()+"方法发生异常"+throwable);
                throw throwable;
            }finally {
                log.info(jp.getSignature().getName()+"方法结束执行.");
            }
    
        }
    }