spring异常：Couldn't generate CGLIB subclass of class

[shangpusp]

这是我的一部分配置文件，
1、异常是说UserDAOProxy有错误，可是在没找出来。
2、后面Cause by 里说class "spring.dao.UserDAO$$EnhancerByCGLIB$$e180205a"'s signer information does not match signer information of other classes in the same package。
异常在这里的提示用不用参考啊。这是cglib-aop说这个包有冲突吗？可是没找到导入的其他包里也有这个类啊。

请大家帮助下了，谢谢！


<!-- 配置UserDAO -->
<bean id="userDAO" class="spring.dao.UserDAO">
<property name="dataSource">
<ref local="dataSource"/>
</property>
</bean>
<bean id="UserDAOProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="userDAO" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED</prop>
<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
</bean>




ERROR - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'UserDAOProxy' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Couldn't generate CGLIB subclass of class [class spring.dao.UserDAO]: Common causes of this problem include using a final class or a non-visible class; nested exception is net.sf.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
org.springframework.aop.framework.AopConfigException: Couldn't generate CGLIB subclass of class [class spring.dao.UserDAO]: Common causes of this problem include using a final class or a non-visible class; nested exception is net.sf.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
net.sf.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:237)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285)
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:189)
at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:143)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:70)
at org.springframework.transaction.interceptor.TransactionProxyFactoryBean.getProxy(TransactionProxyFactoryBean.java:341)
at org.springframework.transaction.interceptor.TransactionProxyFactoryBean.afterPropertiesSet(TransactionProxyFactoryBean.java:313)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1099)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:400)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:144)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:277)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:321)
at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:139)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:252)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:190)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4334)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:384)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:219)
... 41 more
Caused by: java.lang.SecurityException: class "spring.dao.UserDAO$$EnhancerByCGLIB$$e180205a"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(Unknown Source)
at java.lang.ClassLoader.preDefineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
... 47 more

[denghan]

貌似是反射时找不到spring.dao.UserDAO类

[yjaqktpp]

<bean id="userDAO" class="spring.dao.UserDAO">
<property name="dataSource">
<ref local="dataSource"/>
</property>
</bean>
<bean id="UserDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="userDAO" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED </prop>
<prop key="*">PROPAGATION_REQUIRED,readOnly </prop>
</props>
</property>
</bean>
看看你的配置
<property name="target">
<ref local="userDAO" />
</property>
这时错了,参考一下我的:

<bean id="baseDao" class="com.zy.dao.daoImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>

<bean id="baseManager" parent="txProxyTemplate">
<property name="target">
<bean class="com.zy.service.serviceImpl">
<property name="dao">
<ref bean="baseDao" />
</property>
</bean>
</property>
</bean>

[shangpusp]

还是没解决，可能是对原理理解的不透彻吧

[Rooock]

在使用AOP的时候,有两种方式,一种是用Java的动态代理技术.
另一种是使用cglib在运行时生成代理类的子类.
在这里,它说,我要创建你的UserDao的子类,但是失败了.
原因可能是UserDao类是final的,或者它无法访问.

不过,我认为你拼写错误的可能性更大一些.
查看引用和定义UserDao的地方.

[然月枕流君]

先告诉我,userDAO是接口,还是\类

[shangpusp]

谢谢你了，我的userDAO是类,如下

public class UserDAO {
private DataSource dataSource;

public DataSource getDataSource() {
return dataSource;
}

public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}

//validate the login name isValid
public boolean isValid(String username,String password){
}
//validate the existence of username
public boolean isExist(String username){
}
//add a new user
public void insertUser(User user){
}

[shangpusp]

我查了些东西，说要代理一个类的话要设置
<property name="proxyTargetClass">
<value>true</value>
</property>

我把它添到<bean id="UserDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
里了，可还是那个异常。

[然月枕流君]

设置CGlib为true,然后target格式这样来写,

<property name="optimize" ref="true" ></property>
		//设置为CGlib为true
		<property name="target" ref="dao" ></property>
		//目标类

[shangpusp]

流火你好，感谢你的回答

但按你的写法还是不行，ref=true它报reference Bean true not found
找不到true 后应该是一个类吧，我在哪添加上它啊。

<property name="target" ref="dao" ></property>
这句和我那个
<property name="target">
<ref local="userDAO" />
</property>

应该是等效的，但Bean的名字是userDAO

我仔细查过，好像没有弄错大小写。

[然月枕流君]

proxyTargetClass和optimize设为true,都是使用CGLIB;
这样,你确定你引入了CGLIB的jar包了吗

[shangpusp]

流火，你好，
我已经导入了CGLIB包cglib-nodep-2.1_3.jar
因为在它的源代码里才有抛出的那个Couldn't generate CGLIB subclass of class [class spring.dao.UserDAO]: Common causes of this problem include using a final class or a non-visible class;

你是说设置这个吧
<property name="optimize" value="true" ></property>
或者用
<property name="optimize">
<value>true</value>
</property>

但还是那个异常。

[shangpusp]

终于解决了，谢谢流火，谢谢大家，呵呵

根本问题在于我使用的是CGLIB代理有问题，（外国一些网站上说是这个包本身的问题，但还是不太明白）
还是直接使用JDK的动态代理比较好。
这样，要代理的目标类必须实现一个接口。然后通过该接口来实现代理。

详细的解决办法，我记录在了我的日志里。
http://blog.csdn.net/shangpusp/archive/2009/03/27/4028311.aspx