Javassist two jar packages cause:. Department_$$_javassist_1 cannot is cast to Javassist.util.proxy.Proxy

When working with the following code:

12	Javassist Enhancement failed: com.entities.Departmentjava.lang.ClassCastException: com.entities.Department_$$_javassist_1 cannot be cast to javassist.util.proxy.Proxy

123	<many-to-one name="department"class="com.entities.Department">           <column name="DEPARTMENT_ID"/>       </many-to-one>

The following error occurred when outputting data to the page:

12	Javassist Enhancement failed: com.entities.Departmentjava.lang.ClassCastException: com.entities.Department_$$_javassist_1 cannot be cast to javassist.util.proxy.Proxy

The reason is that there are two javassis jar packages, one is hibernate, one is struts2 ..., the lower version is deleted!

From for notes (Wiz)

Javassist two jar packages cause:. Department_$$_javassist_1 cannot is cast to Javassist.util.proxy.Proxy