spring AOP基于注解的应用

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这里写一个spring AOP基于注解的应用例子，它将使用基于注解的配置实现通知。

下面是Logging.java文件的内容。这实际上是一个Aspect模块的样本，它定义了在各个点被调用的方法。

package com.yiibai;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;@Aspectpublic class Logging {   /** Following is the definition for a pointcut to select    *  all the methods available. So advice will be called    *  for all the methods.    */   @Pointcut("execution(* com.yiibai.*.*(..))")   private void selectAll(){}   /**     * This is the method which I would like to execute    * before a selected method execution.    */   @Before("selectAll()")   public void beforeAdvice(){      System.out.println("[beforeAdvice] Going to setup student profile.");   }  }

以下是Student.java文件的内容：

package com.yiibai;public class Student {   private Integer age;   private String name;   public void setAge(Integer age) {      this.age = age;   }   public Integer getAge() {      System.out.println("Age : " + age );      return age;   }   public void setName(String name) {      this.name = name;   }   public String getName() {      System.out.println("Name : " + name );      return name;   }   public void printThrowException(){      System.out.println("Exception raised");      throw new IllegalArgumentException();   }}

以下是MainApp.java文件的内容：

package com.yiibai;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class MainApp {   public static void main(String[] args) {      ApplicationContext context =              new ClassPathXmlApplicationContext("Beans.xml");      Student student = (Student) context.getBean("student");      student.getName();      student.getAge();      }}

以下是配置文件Beans.xml文件的内容：

<?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:aop="http://www.springframework.org/schema/aop"    xsi:schemaLocation="http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd     http://www.springframework.org/schema/aop     http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">    <aop:aspectj-autoproxy/>   <!-- Definition for student bean -->   <bean id="student" class="com.yiibai.Student">      <property name="name"  value="minsu" />      <property name="age"  value="25"/>         </bean>   <!-- Definition for logging aspect -->   <bean id="logging" class="com.yiibai.Logging"/> </beans>

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