采用GenericManager做业务处理的时候CGLIB报错.

参照了appf.项目中我把Service这层的类改了一下.定义了两个Service的父类.一个是:

public interface GenericManager<T, PK extends Serializable> {

public List<T> getAll();

public T get(PK id);

.......基本的CRUD方法

}

另一个是:

public class GenericManagerImpl<T, PK extends Serializable> implements GenericManager<T, PK> {

protected BaseGenericHibernateDAO<T, PK> baseGenericHibernateDAO;


public GenericManagerImpl(BaseGenericHibernateDAO<T, PK> baseGenericHibernateDAO) {
this.baseGenericHibernateDAO = baseGenericHibernateDAO;
}

对应实现上面的接口CRUD方法

}

程序中引用.其中如UserInfoManager Interface继承GenericManager<UserInfo, Integer>

UserInfoManagerImpl实现

[java]

public class UserManagerImpl extends GenericManagerImpl<UserInformation,Integer> implements UserManager {

UserDao userDao

public UserManagerImpl(UserDAO userDao) {
super(userDao);
this.userDao=userDao;
}

[/java]

}

但是现在项目启动的时候抛出一个如下的错误 ,被困扰了一天了.特来论坛发个贴求助.指点一下.非常感谢:

Caused by: org.springframework.aop.framework.AopConfigException: Couldn't generate CGLIB subclass of class [class com.xxxx.user.service.impl.UserManagerImpl]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given
Caused by: java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given
at net.sf.cglib.proxy.Enhancer.emitConstructors(Enhancer.java:718)
at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:499)
at net.sf.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
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:196)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:429)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:299)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:315)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1181)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:428)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:251)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:156)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:248)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:160)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:287)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:352)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:244)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:187)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3830)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4337)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)

给GenericManagerImpl声明一个无参数constructor

你这个似乎是通过构造方法注入的吗？

问题解决了.是Spring AOP的问题.主要是出现在事务这块,由于我用的是Spring2.0 AOP 来声明事务.在声明事务的时候我把taget-prent-class="true" 了,但事实上不能为true.去掉这个就OK了因为要针对接口代理.

请问你 UserDAO  有继承 基于 泛型的  “基类（接口）”么？


另外能否把 你那个 service的 spring 配置 文件贴一下  谢谢