aop 之 helloworld

    技术2022-05-12  1

     先看看xml文件:<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans>      

    <bean id="MyInterceptor" class="MethodTimeCostInterceptor"/>             

    <bean id="myAOPProxy"  class="org.springframework.aop.framework.ProxyFactoryBean">               <property name="proxyInterfaces">  <value>ITest</value>               </property>                             <property name="target">                       <ref local="test"/>               </property>               <property name="interceptorNames">                       <value>MyInterceptor</value>               </property>        </bean>      

    <bean id="test" class="Test">       </bean>

    </beans>

    2:然后我们添加一个接口:ITest。内容如下:public interface ITest {  public  void select() throws Exception;  public  void update();  public  void delete();}

    3:添加实现类:Test。实现如下:public class Test    implements ITest {  long a = 10;  public void select() throws Exception {    for (int i = 0; i < 25; i++) {      a =a + a;    }    System.out.println("the value si ............. " +a);  }

      public void update() {    System.out.println("update......................");  }

      public void delete() {    System.out.println("delete......................");  }

    }

    4:最后是Interceptor:public class MethodTimeCostInterceptor    implements MethodInterceptor, Serializable {    public Object invoke(MethodInvocation invocation) throws Throwable {    System.out.println("the invocation's name is ..... " + invocation.getMethod().getName());    long time = System.currentTimeMillis();    System.out.println("begin");    Object rval = invocation.proceed();            System.out.println("the invocation's params is ....... "+invocation.getMethod().getParameterTypes());    time = System.currentTimeMillis() - time;    System.out.println("end");    System.out.println("the time is ..... "+time);    return rval;  }}5:测试main方法:public static void main(String ar[]){        ClassPathResource resource = new ClassPathResource("beans.xml");    XmlBeanFactory beanFactory = new XmlBeanFactory(resource);    ITest itest =(ITest) beanFactory.getBean("myAOPProxy");    try {      itest.select();    }    catch (Exception ex) {    }  }

    我们看到了所有的源码。配置spring 这里就不多说了,运行main方法就可以看到执行之后的结果。此文只是起到抛砖引玉的目的,有什么错误的地方请指出,谢谢。


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