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:
<?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:
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(); } }