spring AOP 中的ProxyFactoryBean 问题

下面是编写一个Spring AOP权限管理的例子 ，代码如下：

首先定义一个用户:

public class User {

private String username;

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

}

用户有三种人:未注册用户,注册用户,与管理员

注册用户可以可以发表,回复帖子

管理员除了可以发表,回复帖子,还可以删除帖子!

下面定义TestCommunity接口:

public interface TestCommunity {

public void answerTopic();

public void deleteTopic();

}

实现上面接口的TestCommunityImpl类:

public class TestCommunityImpl implements TestCommunity {

//注册用户与管理员拥有的功能

public void answerTopic() {

System.out.println("可以发表,回复帖子");

}

//管理员拥有的功能

public void deleteTopic() {

System.out.println("可以删除帖子!");

}

}

下一步,建立一下依赖注入的实现类TestResultImpl:

public class TestResultImpl {

private TestCommunity test;

public void setTest(TestCommunity test) {

this.test = test;

}

public void answerTopic() {

test.answerTopic();

}

public void deleteTopic() {

test.deleteTopic();

}

}

接下来,就是最重要的一个类,拦截器,Around处理类型的,类TestAuthorityInterceptor:

import org.aopalliance.intercept.MethodInterceptor;

import org.aopalliance.intercept.MethodInvocation;

//创建Around处理应该实现MethodInterceptor接口

public class TestAuthorityInterceptor implements MethodInterceptor {

private User user;

public User getUser() {

return user;

}

public void setUser(User user) {

this.user = user;

}

// invoke方法返回调用的结果

public Object invoke(MethodInvocation invocation) throws Throwable {

String methodName = invocation.getMethod().getName();

if (user.getUsername().equals("unRegistedUser")) {

System.out.println("你的身份是未注册用户,没有权限回复,删除帖子!");

return null;

}

if ((user.getUsername().equals("user")) && (methodName.equals("deleteTopic"))) {

System.out.println("你的身份是注册用户,没有权限删除帖子");

return null;

}

// proceed()方法对连接点的整个拦截器链起作用,拦截器链中的每个拦截器都执行该方法,并返回它的返回值 return invocation.proceed(); }}

配置文件:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<bean id="authTarget" class="org.test.lighter.TestCommunityImpl" />



<!-- 其中的username可以写为admin,user,和unRegistedUser -->

<bean id="user" class="org.test.lighter.User">

<property name="username" value="user" />

</bean>



<!-- 配置拦截器 -->

<bean id="TestAuthorityInterceptor" class="org.test.lighter.TestAuthorityInterceptor">

<property name="user" ref="user" />

</bean>



<!-- 配置代理工厂bean -->

<bean id="service" class="org.springframework.aop.framework.ProxyFactoryBean">

<property name="proxyInterfaces">

<value>org.test.lighter.TestCommunity</value>

</property>

<property name="target" ref="authTarget"/>

<property name="interceptorNames">

<list>

<value>TestAuthorityInterceptor</value>

</list>

</property>

</bean>

<bean id="testResult" class="org.test.lighter.TestResultImpl">

<property name="test" ref="service" />

</bean>

</beans>

再写一个执行文件BeanTest:

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.FileSystemXmlApplicationContext;

public class BeanTest {

public static void main(String[] args) throws Exception {

ApplicationContext ctx = new FileSystemXmlApplicationContext("src/bean.xml");

TestResultImpl test = (TestResultImpl)ctx.getBean("testResult");

test.answerTopic();

test.deleteTopic();

}

}

执行结果:

1、如果是管理员,打印出:可以发表,回复帖子可以删除帖子!

2、如果是注册用户:可以发表,回复帖子你的身份是注册用户,没有权限删除帖子

3、未注册用户:你的身份是未注册用户,没有权限回复,删除帖子!



我按照上面写的代码测试之后报错，提示：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'service' defined in class path resource [bean.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'java.lang.Class[]' for property 'proxyInterfaces'; nested exception is java.lang.IllegalArgumentException: Cannot find class [org.test.lighter.TestCommunity]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at org.aopalliance.intercept.BeanTest.main(BeanTest.java:12)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'java.lang.Class[]' for property 'proxyInterfaces'; nested exception is java.lang.IllegalArgumentException: Cannot find class [org.test.lighter.TestCommunity]
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:490)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:516)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1406)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1365)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 11 more
Caused by: java.lang.IllegalArgumentException: Cannot find class [org.test.lighter.TestCommunity]
at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:294)
at org.springframework.beans.propertyeditors.ClassArrayEditor.setAsText(ClassArrayEditor.java:68)
at org.springframework.beans.TypeConverterDelegate.doConvertTextValue(TypeConverterDelegate.java:434)
at org.springframework.beans.TypeConverterDelegate.doConvertValue(TypeConverterDelegate.java:406)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:163)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:470)
... 17 more
Caused by: java.lang.ClassNotFoundException: org.test.lighter.TestCommunity
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:258)
at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:291)
... 22 more


我看报错的大概意思是说我“配置文件中”的“ <!-- 配置代理工厂bean -->”中的“ProxyFactoryBean”找不到，是不是这个类没有写还是没导包？这个类的作用是什么？请大虾指教