Question

spring什么声明式事务管理处错

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'deptBiz' defined in class path resource [applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.

ApplicationContext.xml配置如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation"
value="classpath:hibernate.cfg.xml">
</property>
</bean>

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

<tx:advice id="txAdvice" transaction-manager="txmanager">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="find*" read-only="true"/>
<tx:method name="search*" read-only="true"/>
<tx:method name="query*" read-only="true"/>
<tx:method name="del*" propagation="REQUIRED"/>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="do*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="*" propagation="REQUIRED" read-only="true"/>
</tx:attributes>
</tx:advice>

<aop:config>
<aop:pointcut expression="execution(* com.biz.*.*(..))" id="serviceMethod"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
</aop:config>

<!-- DAO -->
<bean id="EmpDAO" class="com.DAO.impl.EmpDAOimpl">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="DeptDAO" class="com.DAO.impl.DeptDAOimpl">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>

<!-- Biz -->
<bean id="deptBiz" class="com.biz.DeptBiz">
<property name="deptdao" >
<ref bean="DeptDAO"/>
</property>
</bean>

</beans>

Answer 1

报错显示是你的一个类错误，spring创建 deptBiz这个bean错误了。原因是Cannot proxy target class because CGLIB2 is not available

Exception：
Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.

解决方法一：导入cglib-nodep-2.1_3.jar包，或者导入asm-2.2.3.jar和cglib-2.2.jar
解决方法二：为需要代理的目标类抽出接口。

Answer 2

错误创建bean的名称为deptBiz的“定义在类路径资源的ApplicationContext-thistong.xml]：错误设置属性值;嵌套异常是org.springframework.beans.notwritablepropertyexception：无效的属性”deptBiz的bean类[com.thistong。 service.impl.userserviceimpl]：bean属性的EmpDAO
的'不写，或有一个无效的setter方法。
1、setter方法的参数类型不匹配的getter的返回类型导致。
2、为需要代理的目标类抽出接口。