参考文章:https://www.yiibai.com/spring/spring-aop-examples-advice.html
执行customerService之前执行一段HijackBeforeMethod中方法
customerService:
package com.crud.spring.service; public class CustomerService { private String name; private String url; public void setName(String name) { this.name = name; } public void setUrl(String url) { this.url = url; } public void printName() { System.out.println("Customer name : " + this.name); } public void printURL() { System.out.println("Customer website : " + this.url); } public void printThrowException() { throw new IllegalArgumentException(); } }
HijackBeforeMethod
(实现接口MethodBeforeAdvice,
如果是执行customerService之后执行,实现接口AfterReturningAdvice):
package com.crud.spring.aop; import java.lang.reflect.Method; import org.springframework.aop.MethodBeforeAdvice; public class HijackBeforeMethod implements MethodBeforeAdvice { @Override public void before(Method method, Object[] args, Object target) throws Throwable { System.out.println("HijackBeforeMethod : Before method hijacked!"); } }
xml:
<?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:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="customerService" class="com.crud.spring.service.CustomerService"> <property name="name" value=" YiiBaii Mook Kim"></property> <property name="url" value=" http://www.yiibai.com"></property> </bean> <bean id="hijackBeforeMethodBean" class="com.crud.spring.aop.HijackBeforeMethod" /> <bean id="customerServiceProxy" class="org.springframework.aop.framework.ProxyFactoryBean"> <property name="target" ref="customerService" /> <property name="interceptorNames"> <list> <value>hijackBeforeMethodBean</value> </list> </property> </bean> </beans>
测试:
package com.crud.spring.test; import com.crud.spring.service.CustomerService; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test { public static void main(String[] args) { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml"); CustomerService cust = (CustomerService) applicationContext.getBean("customerServiceProxy"); System.out.println("*************************"); cust.printName(); System.out.println("*************************"); cust.printURL(); System.out.println("*************************"); try { cust.printThrowException(); } catch (Exception e) { } } }