创建Bean
//首先创建业务接口
package com.codestd.springstudy.aop.xml.service;
public interface UserService {
public void login();
public void logout() throws Exception;
}
//创建实现类
package com.codestd.springstudy.aop.xml.service;
public class UserServiceImpl implements UserService {
@Override
public void login() {
System.out.println("User login");
}
@Override
public void logout() throws Exception {
System.out.println("User logout");
throw new Exception("Exception test");
}
}
//创建切面类
package com.codestd.springstudy.aop.xml;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
public class AspectBean {
public void doAfter(JoinPoint jp){
System.out.println("do after");
}
public void dobefore(JoinPoint jp){
System.out.println("do after");
}
public Object doAround(ProceedingJoinPoint jp) throws Throwable{
System.out.println("do Around");
Object obj = jp.proceed();
return obj;
}
public void doThrowing(JoinPoint jp,Exception e){
System.out.println(e.getClass().getName()+"|->|"+e.getMessage());
}
}
配置AOP
下面使用XML配置AOP
<bean id="userService" class="com.codestd.springstudy.aop.xml.service.UserServiceImpl" />
<bean id="aspectBean" class="com.codestd.springstudy.aop.xml.AspectBean" />
<aop:config>
<aop:aspect id="aspect" ref="aspectBean">
<aop:pointcut expression="execution(* com.codestd.springstudy.aop.xml.service.*.*(..))" id="servicepointcut"/>
<aop:after method="doAfter" pointcut-ref="servicepointcut" />
<aop:before method="dobefore" pointcut-ref="servicepointcut"/>
<aop:around method="doAround" pointcut-ref="servicepointcut"/>
<aop:after-throwing method="doThrowing" pointcut-ref="servicepointcut" throwing="e"/>
</aop:aspect>
</aop:config>
doAround
方法要有返回值,并且类型是Object,接收的参数类型为ProceedingJoinPoint
。
aop:after-throwing
中需要使用throwing
指定异常的参数名,doThrowing(JoinPoint jp,Exception e)
中的e
。
测试
测试方法如下
package com.codestd.springstudy.aop.xml.service;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:aop/applicationContext.xml"})
public class UserServiceImpltest {
@Autowired
private UserService userService;
@Test
public void test() throws Exception {
this.userService.login();
this.userService.logout();
}
}
测试结果如下
do after do Around User login do after do after do Around User logout do after java.lang.Exception|->|Exception test
使用XML方式配置引入
<aop:config>
<aop:aspect>
<aop:declare-parents types-matching="com.codestd.springstudy.aop.xml.service.UserService+" implement-interface="com.codestd.springstudy.aop.introductions.Flyable" default-impl="com.codestd.springstudy.aop.introductions.DefaultFlyable"/>
</aop:aspect>
</aop:config>
测试类如下
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:aop/applicationContext.xml"})
public class UserServiceImpltest {
@Autowired
private Flyable flyable;
@Test
public void test() throws Exception {
this.flyable.fly();
}
}
原文地址:https://www.jb51.cc/xml/295194.html
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