初学SSH项目，请热心老师相助_Java Web开发

初学SSH项目，请热心老师帮助
初学SSH，向ORACLE表添加数据出错，请各位老师帮助解决，代码如下：


org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: com.sun.proxy.$Proxy5; nested exception is org.hibernate.MappingException: Unknown entity: com.sun.proxy.$Proxy5
	org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:690)
	org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
	org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
	org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
	org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:683)
	sun.mjava.data.TUserDAO.save(TUserDAO.java:34)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
	org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
	org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	com.sun.proxy.$Proxy6.save(Unknown Source)
	sun.mjava.data.InputUserNameService.execute(InputUserNameService.java:49)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

index.jsp：


<%@taglib uri="/struts-tags" prefix="s"%><%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    This is my JSP page. <br><s:form action="SaveUserName">
		<s:textfield name="username"></s:textfield>
		<s:submit></s:submit>
	</s:form>
</body>
</html>

struts.xml：


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

	<package name="mystruts" extends="struts-default">
		<action name="SaveUserName" class="SaveUserNameClass">
			<result name="success" type="dispatcher">
				/welcome.jsp
			</result>
		</action></package></struts>

hibernate.cfg.xml：


<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

	<session-factory>
		<property name="dialect">
			org.hibernate.dialect.OracleDialect
		</property>
		<property name="connection.url">
			jdbc:oracle:thin:@localhost:1521:orcl
		</property>
		<property name="connection.username">sundata</property>
		<property name="connection.password">123</property>