Spring AOP之ProxyFactoryBean与BeanNameAutoProxyCreator

准备业务接口和实现类

package org.lanqiao.springDemo.aop;

public interface SomeBiz {
  public void addBiz();
  public void other();
}

package org.lanqiao.springDemo.aop;

public class SomeBizImpl implements SomeBiz{
  public void addBiz(){
    System.out.println("新增数据的业务逻辑");
  }
  public void other(){
    System.out.println("其他方法");
  }
}

编写方法拦截器（通知）

package org.lanqiao.springDemo.aop;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

public class Advice1 implements MethodInterceptor {
  public Object invoke(MethodInvocation methodInvocation) throws Throwable {
    System.out.printf("代理逻辑发生在调用方法%s之前\n", methodInvocation.getMethod().toGenericString());
    return methodInvocation.proceed();
  }
}

ProxyFactoryBean基本配置

<!--通知-->
  <bean id="advice1" class="org.lanqiao.springDemo.aop.Advice1" />

  <!--切面组合-->
  <bean class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor" id="advisor1">
    <property name="advice" ref="advice1"/>
  <!--这里不是正则表达式而是简单的通配-->
    <property name="mappedName" value="*Biz"/>
  </bean>

  <bean id="someBiz" class="org.lanqiao.springDemo.aop.SomeBizImpl"/>

  <!--声明代理-->
  <bean class="org.springframework.aop.framework.ProxyFactoryBean" id="someBizProxy">
    <!--指定接口-->
    <property name="proxyInterfaces" value="org.lanqiao.springDemo.aop.SomeBiz"/>
    <!--指定实现类-->
    <property name="target" ref="someBiz"/>
    <!--拦截器名字-->
    <property name="interceptorNames">
      <list>
        <value>advisor1</value>
      </list>
    </property>
  </bean>

测试

package org.lanqiao.springDemo.aop;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;

@ContextConfiguration("classpath:aop.xml")
public class SomeBizImplTest extends AbstractJUnit4SpringContextTests {
  @Autowired
  private SomeBiz someBizProxy;

  @org.junit.Test
  public void addBizUsingInterfaceProxy() throws Exception {
    someBizProxy.addBiz();
  }
}

结果：

代理逻辑发生在调用方法public abstract void org.lanqiao.springDemo.aop.SomeBiz.addBiz()之前
新增数据的业务逻辑

使用更强大的正则切入点

使用JdkRegexpMethodPointcut

<!--通知-->
  <bean id="advice1" class="org.lanqiao.springDemo.aop.Advice1" />


<bean id="regexpAdvisor" class="org.springframework.aop.support.DefaultPointcutAdvisor">
  <property name="advice" ref="advice1"/>
  <property name="pointcut">
    <bean class="org.springframework.aop.support.JdkRegexpMethodPointcut">
      <!--这里可以使用正则表达式-->
      <property name="pattern" value=".*Biz.*" />
    </bean>
  </property>
</bean>

  <bean id="someBiz" class="org.lanqiao.springDemo.aop.SomeBizImpl"/>

  <!--声明代理-->
  <bean class="org.springframework.aop.framework.ProxyFactoryBean" id="someBizProxy">
    <!--指定接口-->
    <property name="proxyInterfaces" value="org.lanqiao.springDemo.aop.SomeBiz"/>
    <!--指定实现类-->
    <property name="target" ref="someBiz"/>
    <!--拦截器名字-->
    <property name="interceptorNames">
      <list>
        <value>regexpAdvisor</value>
      </list>
    </property>
  </bean>

测试效果同上

使用更强大的可以通配beanName的BeanNameAutoProxyCreator

上例的缺点在于，对于每个业务类我们都要配一个ProxyFactoryBean，接下来我们使用更为强大的BeanNameAutoProxyCreator来自动为满足通配条件的bean生产代理，而且在依赖业务类的地方直接使用原始beanName即可：

<bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
    <!--拦截器名字-->
    <property name="interceptorNames">
      <list>
        <value>regexpAdvisor</value>
      </list>
    </property>
    <!--bean的名字可以用通配符-->
    <property name="beanNames" value="*Biz"/>
  </bean>

这样配置后，我们不需要ProxyFactoryBean，依赖业务bean时，也直接依赖原始bean的名字：

@Autowired
  private SomeBiz someBiz;

  @org.junit.Test
  public void addBizUsingBean() throws Exception {
    someBiz.addBiz();
  }

还有更强大的AspectJExpressionPointcutAdvisor

其他配置都不要，配置如下

<!--通知-->
  <bean id="advice1" class="org.lanqiao.springDemo.aop.Advice1" />
  <!--业务bean-->
  <bean id="someBiz" class="org.lanqiao.springDemo.aop.SomeBizImpl"/>

  <bean id="aspectAdvisor" class="org.springframework.aop.aspectj.AspectJExpressionPointcutAdvisor">
    <property name="advice" ref="advice1"/>
    <!--切入点表达式-->
    <property name="expression" value="execution( * org.lanqiao.springDemo..*Biz*.*Biz(..))" />
  </bean>
  <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>

因为我们的表达式可以直接指定包名、类名、方法名甚至参数类型、返回值类型等，所以不再需要基于bean名称的代理，必须开启自动代理：DefaultAdvisorAutoProxyCreator

希望有帮助，转载无需授权！