10.自动创建代理

Spring提供自动生成代理，让容器自动生成代理，把用户繁琐的配置工作中解放出来

在Spring使用BeanPostProcessor完成这项工作

BeanNameAutoProxyCreator

1 public class Waiter {
2     public void greetTo(String name) {
3         System.out.println("waiter greet to " + name + "...");
4     }
5 
6     public void serveTo(String name) {
7         System.out.println("waiter serving " + name + "...");
8     }
9 }

1 public class Sheer {
2     public void greetTo(String name) {
3         System.out.println("seller greet to " + name + "...");
4     }
5 }

1 public class GreetingBeforeAdvice1 implements MethodBeforeAdvice{
2     public void before(Method method, Object[] args, Object obj)
3             throws Throwable {
4         String clientName = (String) args[0];
5         System.out.println(obj.getClass().getName() + "." + method.getName());
6         System.out.println("How are you！Mr." + clientName + ".");
7     }
8 }

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans 
 7        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
 8        http://www.springframework.org/schema/context 
 9        http://www.springframework.org/schema/context/spring-context-3.1.xsd
10        http://www.springframework.org/schema/tx 
11        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
12        http://www.springframework.org/schema/aop
13        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
14 
15     <bean id="waiter" class="com.asm.Waiter" />
16     <bean id="seller" class="com.asm.Sheer" />
17     <bean id="greetingAdvice" class="com.asm.GreetingBeforeAdvice1" />
18 
19 
20 
21     <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"
22         p:beanNames="*er"  //由于只有一个bean名称，所以直接使用属性进行配置。
23         p:interceptorNames="greetingAdvice" 
24         p:optimize="true"/> //强制使用CGLIB代理
25 
26 </beans>

 1 package com.asm;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 public class SpringTest1 {
 7 public static void main(String[] args) {
 8         
 9         ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
10         Waiter waiter = (Waiter)ctx.getBean("waiter");
11         Sheer sheer = (Sheer)ctx.getBean("seller");
12         waiter.greetTo("join");
13         waiter.serveTo("join");
14         sheer.greetTo("join");
15     }
16 }

DefaultAdvisorAutoProxyCreator

切面是切点和增强的复合体

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans 
 7        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
 8        http://www.springframework.org/schema/context 
 9        http://www.springframework.org/schema/context/spring-context-3.1.xsd
10        http://www.springframework.org/schema/tx 
11        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
12        http://www.springframework.org/schema/aop
13        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
14 
15     <bean id="waiter" class="com.asm.Waiter" />
16     <bean id="seller" class="com.asm.Sheer" />
17     <bean id="greetingAdvice" class="com.asm.GreetingBeforeAdvice1" />
18 
19     <bean id="regexAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor" 
20     p:patterns=".*greet.*"
21     p:advice-ref="greetingAdvice"
22     />
23         
24     <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>
25 
26 </beans>

posted on 2016-06-20 16:56 Sharpest 阅读(211) 评论(0) 编辑收藏举报