SSM开启事务报错的解决方法

SSM开启事务失败的解决方法：

 

希望在xxService的一个方法里启动事务，添加了事务注解：

@Transactional(propagation = Propagation.REQUIRED, rollbackFor = Throwable.class)
public User updateData(User user){
    ......
 }

applicationContext.xml配置如下

transaction-manager="transactionManager"显示为灰色，鼠标停在上面提示Redundant default attribute value assignment

运行工程报以下错误：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'xxController': Unsatisfied dependency expressed through field 'xxService'; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'xxService' is expected to be of type 'com.xx.service.xxService' but was actually of type 'com.sun.proxy.$Proxy39'

解决方法：

把

删掉，替换成

即可。