1、引入spring core和spring aop和spring aspect包
代码语言:javascript复制 5.1.5.RELEASE
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-aspects
${spring.version}
2、配置web.xml
代码语言:javascript复制 springweb
web/index.jsp
default
*.js
default
*.css
default
*.html
contextConfigLocation
classpath:spring-core.xml
org.springframework.web.context.ContextLoaderListener
encodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
UTF-8
encodingFilter
/*
dispatcherServlet
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:spring-mvc.xml
1
dispatcherServlet
/
3、配置spring xml文件 spring-core.xml和spring-aop.xml
spring-core.xml(扫描注解包和启动注解式的声明对AspectJ的支持)
代码语言:javascript复制
spring-aop.xml(非注解的xml配置)
代码语言:javascript复制
4、编写测试类 UserDao.java UserDao Imp.java
代码语言:javascript复制package com.gxwz.dao;
public interface UserDao {
public void addUser();
public void deleteUser();
public void inquireUser();
public void updteUser();
public void queryAll();
}
代码语言:javascript复制package com.gxwz.dao.impl;
import org.springframework.stereotype.Repository;
import com.gxwz.dao.UserDao;
@Repository("userDao")
public class UserDaoImpl implements UserDao{
@Override
public void addUser() {
System.out.println("addUser()....");
}
@Override
public void deleteUser() {
System.out.println("deleteUser()....");
}
@Override
public void inquireUser() {
System.out.println("inquireUser()....");
}
@Override
public void updteUser() {
System.out.println("updteUser()....");
}
@Override
public void queryAll() {
}
}
5、核心类:spring的切面类 MyAspect.java
代码语言:javascript复制package com.gxwz.aop;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
/**
* Spring切面类:可以存在多个通知
* @author com
*/
@Aspect
@Component
class MyAspect{
//配置切入点
@Pointcut("execution(* com.gxwz.*.*.*(..))")
//使用一个返回值为void、方法体为空的方法命名切入点
private void myPointCut() {}
/**
* 前置通知
* @param joinPoint
*/
@Before("myPointCut()")
public void myBefore(JoinPoint joinPoint) {
// System.out.println("前置通知:模拟执行权限检查.....");
System.out.println("springaop:aspectj 目标类:" joinPoint.getTarget() " 方法:" joinPoint.getSignature().getName() "()");
// System.out.println("springaop:aspectj 被植入增强处理的目标方法为:" joinPoint.getSignature().getName());
}
/**
* 后置通知
* @param joinPoint
*/
@AfterReturning("myPointCut()")
public void myAfterReturning(JoinPoint joinPoint) {
// System.out.println("springaop:aspectj 后置通知:模拟记录日志....");
// System.out.println("springaop:aspectj 被植入处理目标方法为:" joinPoint.getSignature().getName());
}
/**
* 环绕通知
*/
@Around("myPointCut()")
public Object myAround(ProceedingJoinPoint proceedingJoinPoint) {
System.out.println("springaop:aspectj 环绕开始:执行目标方法之前,模拟开启事务....");
Object object = null;
try {
//执行当前目标方法
object = proceedingJoinPoint.proceed();
} catch (Throwable e) {
e.printStackTrace();
}
System.out.println("springaop:aspectj 环绕结束:执行目标方法之后,模拟关闭事务...");
return object;
}
/**
* 异常通知
* @param jointPoint
* @param e
*/
@AfterThrowing(value = "myPointCut()" , throwing = "e")
public void myAfterThrowing(JoinPoint jointPoint, Throwable e) {
System.out.println("springaop:aspectj 异常通知: " e.getMessage());
}
/**
* 最终通知
*/
@After("myPointCut()")
public void myAfter() {
System.out.println("springaop:aspectj 最终通知:模拟方法结束后释放资源的操作....");
}
}
6、测试类 SpringTest.java
代码语言:javascript复制package com.gxwz.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.gxwz.dao.UserDao;
public class SpringTest {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("spring-core.xml");
// ApplicationContext context = new AnnotationConfigApplicationContext(SpringConfig.class);
UserDao userDao = (UserDao)context.getBean(UserDao.class);
userDao.addUser();
// userDao.deleteUser();
// userDao.inquireUser();
// userDao.queryAll();
}
}