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目標(biāo)對(duì)象沒(méi)有實(shí)現(xiàn)任何接口，Spring使用CGLIB庫(kù)生成目標(biāo)對(duì)象的子類(lèi)

項(xiàng)目組內(nèi)一位同事，在重構(gòu)代碼過(guò)程中將幾個(gè)模塊的Service層接口去掉后. 修改成了沒(méi)有實(shí)現(xiàn)任何接口的類(lèi)，并且繼承了一個(gè)抽象基類(lèi)。
然后我更新代碼后執(zhí)行系統(tǒng)中的該模塊，發(fā)現(xiàn)部分表數(shù)據(jù)沒(méi)有完整持久到數(shù)據(jù)庫(kù)中。看了下代碼和spring配置文件，原來(lái)調(diào)整后的Biz的業(yè)務(wù)類(lèi)沒(méi)有配置事務(wù)導(dǎo)致的。

修改了下spring配置文件（beanNames綁定了*Biz）:

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
    <bean id= "propertyConfigurer"
        class = "com.ccms.base.util.DecryptPropertyPlaceholderConfigurer" >
     <property name="locations" value= "classpath:sysConfig.properties" />
   </bean>
    
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" >
        <property name="driverClass" value="com.mysql.jdbc.Driver" />
        <property name="jdbcUrl" value="${dataSource.jdbcUrl}&useUnicode=true&characterEncoding=UTF-8" />
        <property name="user" value="${dataSource.userName}" />
        <property name="password" value="${dataSource.password}" />
          <property name="minPoolSize" value="5" />
        <property name="maxPoolSize" value="50" />
        <property name="maxStatements" value="0" />
        <property name="idleConnectionTestPeriod" value="60" />
        <property name="acquireRetryAttempts" value="3" />
    </bean>

    
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref local="dataSource" />
        </property>
    
        <property name="mappingDirectoryLocations">
            <list>
                <value>classpath:/com/ccms/base/mapping</value>
            </list>
        </property>

        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.generate_statistics">true</prop>
                <prop key="hibernate.connection.release_mode">auto</prop>
                <prop key="hibernate.autoReconnect">true</prop>
                <prop key="hibernate.connection.autocommit">false</prop>
                
            </props>
        </property>
    </bean>

    <bean id="myTransactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref bean="sessionFactory" />
        </property>
    </bean>

    <bean id="transactionInterceptor"
        class="org.springframework.transaction.interceptor.TransactionInterceptor">
        <property name="transactionManager" ref="myTransactionManager" />
        <property name="transactionAttributes">
            <props>
                <prop key="*">PROPAGATION_REQUIRED,-Exception</prop>
            </props>
        </property>
    </bean>
    <bean  class="org.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor">
        <property name="transactionInterceptor"
            ref="transactionInterceptor" />
    </bean>
    <bean
        class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
        <property name="beanNames">
            <list>
                <value>*Service</value>
                <value>*Biz</value>
            </list>
        </property>
        <property name="interceptorNames">
            <list>
                <value>transactionInterceptor</value>
            </list>
        </property>
    </bean>
</beans>

啟動(dòng)tomcat后報(bào)出如下錯(cuò)誤信息：

[2013-03-05 10:36:56] [ERROR] Context initialization failed - at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:215)

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginBiz' defined in ServletContext resource [/WEB-INF/spring-service-resource.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.ccms.login.LoginBiz]: 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

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:445)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:383)

at java.security.AccessController.doPrivileged(Native Method)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:353)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:169)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:400)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:736)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:369)

at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:261)

at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)

at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)

at org.apache.catalina.core.StandardService.start(StandardService.java:519)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)

at org.apache.catalina.startup.Catalina.start(Catalina.java:581)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.ccms.login.LoginBiz]: 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

at org.springframework.aop.framework.Cglib2AopProxy.getProxy(Cglib2AopProxy.java:213)

at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)

at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:433)

at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:299)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:331)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1266)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:438)

... 28 more

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:201)

... 34 more

2013-3-5 10:36:56 org.apache.catalina.core.StandardContext listenerStart

嚴(yán)重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener