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) {
}
}
}