SpringAop

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SpringAop面向切面的思想

就是在某个方法之前和之后插入

package biz;import java.lang.reflect.Method;import java.util.Arrays;import org.springframework.aop.AfterReturningAdvice;public class MyAfter implements AfterReturningAdvice{public void afterReturning(Object arg0, Method arg1, Object[] arg2,Object arg3) throws Throwable {System.out.println("------------后置增强----------------");System.out.println("在"+arg3+"对象上的"+arg1.getName()+"方法");System.out.println("传入参数"+Arrays.toString(arg2));System.out.println("返回的结果"+arg0);}}

package biz;import java.lang.reflect.Method;import java.util.Arrays;import org.springframework.aop.MethodBeforeAdvice;public class MyBefore  implements MethodBeforeAdvice{public void before(Method arg0, Object[] arg1, Object arg2)throws Throwable {System.out.println("------------前置增强-------------");System.out.println("在"+arg2+"对象上的"+arg0.getName()+"方法");System.out.println("传入参数"+Arrays.toString(arg1));System.out.println("---------------------------");}}
<bean id="before" class="biz.MyBefore"/><bean id="after" class="biz.MyAfter"/><aop:config><aop:pointcut id="cutpiont" expression="execution(public void print(String))"/><aop:advisor pointcut-ref="cutpiont" advice-ref="before"/><aop:advisor pointcut-ref="cutpiont" advice-ref="after"/></aop:config>


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