SpringAOP01前置增强MethodBeforeAdvice
package com.test.springadvicetype;import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 服务员类
*/
@Component
public class Waiter {
/**
* 服务
* @param name
*/
public String serve(String name) {
System.out.println(name + ",您好,很高兴为您服务。");
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
return name + ",您好,现在是北京时间" + format.format(new Date());
}
/**
* 开车
* @param name
*/
public void driving(String name) {
throw new RuntimeException(name + ",您好,禁止酒后驾车!");
}
}
2、方法调用前增强,实现 MethodBeforeAdvice 接口
package com.test.springadvicetype.afterretuningadvice;import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
/**
* 前置增强实现类
*/
@Component
public class SpringBeforeAdvice implements MethodBeforeAdvice {
@Override
public void before(Method method, Object[] args, Object target) throws Throwable {
String methodName = method.getName();
System.out.printf("MethodBeforeAdvice增强的方法是%s%n", methodName);
System.out.printf("MethodBeforeAdvice增强的方法的参数是%s%n", args[0]);
System.out.printf("MethodBeforeAdvice增强的对象是%s%n", target);
}
}
3、xml配置,spring-chapter3-springaoptype.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:aop="http://www.springframework.org/schema/aop"
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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 开启注解扫描 -->
<context:component-scan base-package="com.test.springadvicetype"/>
</beans>
4、运行程序
package com.test.springadvicetype.beforeadvice;import com.test.springadvicetype.Waiter;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* Spring前置增强测试
*/
public class SpringBeforeAdviceDemo {
public static void main(String[] args) {
System.out.println("Spring前置增强测试");
System.out.println("==========我是分割线==========");
ApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring-chapter3-springaoptype.xml");
Waiter waiter = (Waiter) context.getBean("waiter");
SpringBeforeAdvice advice = (SpringBeforeAdvice) context.getBean("springBeforeAdvice");
//Spring提供的代理工厂
ProxyFactory pf = new ProxyFactory();
//设置代理目标
pf.setTarget(waiter);
pf.addAdvice(advice);
//生成代理实例
Waiter proxy = (Waiter)pf.getProxy();
proxy.serve("Michael");
System.out.println("==========我是分割线==========");
proxy.serve("Tommy");
}
}
5、运行结果
Spring前置增强测试==========我是分割线==========
MethodBeforeAdvice增强的方法是serve
MethodBeforeAdvice增强的方法的参数是Michael
MethodBeforeAdvice增强的对象是com.test.springadvicetype.Waiter@5276e6b0
Michael,您好,很高兴为您服务。
==========我是分割线==========
MethodBeforeAdvice增强的方法是serve
MethodBeforeAdvice增强的方法的参数是Tommy
MethodBeforeAdvice增强的对象是com.test.springadvicetype.Waiter@5276e6b0
Tommy,您好,很高兴为您服务。
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