aop 初探
1、首先是配置文件:
上图是让aop配置正确,不报红;
完整代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | <?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" xmlns:mvc= "http://www.springframework.org/schema/mvc" xmlns:cache= "http://www.springframework.org/schema/cache" xsi:schemaLocation="http: //www.springframework.org/schema/beans http: //www.springframework.org/schema/beans/spring-beans-4.0.xsd http: //www.springframework.org/schema/context http: //www.springframework.org/schema/context/spring-context-4.0.xsd http: //www.springframework.org/schema/mvc http: //www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http: //www.springframework.org/schema/aop http: //www.springframework.org/schema/aop/spring-aop-4.0.xsd http: //www.springframework.org/schema/cache http: //www.springframework.org/schema/cache/spring-cache.xsd"> <description>Spring MVC Configuration</description> <!-- 启用spring mvc 注解 --> <context:annotation-config/> <!-- 设置使用注解的类所在的jar包 --> <context:component-scan base -package= "com.credi****mony.adapter" ></context:component-scan> <!-- 完成请求和注解POJO的映射 --> <bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <!-- 加载配置属性文件 --> <context:property-placeholder ignore-unresolvable= "true" location= "classpath*:/application.properties" /> <context:property-placeholder location= "classpath:log4j.properties" /> <!-- UTF8解决乱码问题 --> <bean class = "org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" > <property name= "messageConverters" > <list> <bean class = "org.springframework.http.converter.StringHttpMessageConverter" > <property name= "supportedMediaTypes" > <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> </list> </property> </bean> <mvc:annotation-driven/> <bean class = "org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" > <property name= "messageConverters" > <list> <bean class = "org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /> </list> </property> </bean> <!-- 定义视图文件解析 --> <bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name= "prefix" value= "${web.view.prefix}" /> <property name= "suffix" value= "${web.view.suffix}" /> </bean> <!-- 对静态资源文件的访问, 将无法mapping到Controller的path交给 default servlet handler处理 --> <mvc: default -servlet-handler/> <!-- 静态资源映射 --> <mvc:resources mapping= "/static/**" location= "/static/" cache-period= "31536000" /> <!-- 定义无Controller的path<->view直接映射 --> <mvc:view-controller path= "/" view-name= "redirect:${web.view.index}" /> <bean class = "org.springframework.web.servlet.handler.SimpleMappingExceptionResolver" > <property name= "exceptionMappings" > <props> <prop key= "org.apache.shiro.authz.UnauthorizedException" >error/403</prop> <prop key= "java.lang.Throwable" >error/500</prop> </props> </property> </bean> <!-- 开启自动切面代理 --> <aop:aspectj-autoproxy/> </beans> |
2、对应的class文件,exection里的表达式要正确:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | package com.creditharmony.adapter.service.baffle; import com.creditharmony.common.util.DateUtils; import org.apache.ibatis.binding.MapperMethod; import org.apache.log4j.Logger; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.*; import org.aspectj.lang.reflect.MethodSignature; import org.springframework.stereotype.Component; import java.util.Date; @Aspect @Component public class InterceptorBaffle { private static final Logger logger = Logger.getLogger(InterceptorBaffle. class ); // 一分钟,即60000ms private static final long ONE_MINUTE = 60000; // service层的统计耗时切面,类型必须为final String类型的,注解里要使用的变量只能是静态常量类型的 public static final String POINT = "execution (* com.cred####ony.adapter.service..*.*(..))" ; /** * 进入方法后打印日志 * @param joinPoint */ @Before(POINT) public void before(JoinPoint joinPoint) { logger.debug( this .getMethodName(joinPoint)+ " start " + DateUtils.formatDateTime( new Date())); } /** * 方法结束打印日志 * @param joinPoint */ @After(POINT) public void after(JoinPoint joinPoint) { logger.debug( this .getMethodName(joinPoint)+ " after" + DateUtils.formatDateTime( new Date())); } /** * 统计方法执行耗时Around环绕通知 * @param joinPoint * @return */ @Around(POINT) public Object timeAround(ProceedingJoinPoint joinPoint) { // 定义返回对象、得到方法需要的参数 Object obj = null ; Object[] args = joinPoint.getArgs(); long startTime = System.currentTimeMillis(); try { obj = joinPoint.proceed(args); } catch (Throwable e) { logger.error( "统计某方法执行耗时环绕通知出错" , e); } // 获取执行的方法名 long endTime = System.currentTimeMillis(); MethodSignature signature = (MethodSignature) joinPoint.getSignature(); String methodName = signature.getDeclaringTypeName() + "." + signature.getName(); // 打印耗时的信息 this .printExecTime(methodName, startTime, endTime); return obj; } /** * 打印方法执行耗时的信息,如果超过了一定的时间,才打印 * @param methodName * @param startTime * @param endTime */ private void printExecTime(String methodName, long startTime, long endTime) { long diffTime = endTime - startTime; if (diffTime > ONE_MINUTE) { logger.warn( "-----" + methodName + " 方法执行耗时:" + diffTime + " ms" ); } } /** * 获取方法名(类的详细包路径) * @param joinPoint * @return */ private String getMethodName(JoinPoint joinPoint){ return joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName(); } } |
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