实在是没有办法了，就是找不到哪里出错了！！！求大神！！！！
本人菜鸟，看张龙老师的视频学习hibernate。 
按照视频写的代码，结果只对了一半。
我是用sql server 2005+tomcat 7.0+hibernate 4.10+struts 2.3 搭建的。

代码比较杂，还请各位耐心点。

注册页面代码，register.jsp

<form action="savePerson.action">

username:<input type="text" name="username" size="20"><br>
password:<input type="password" name="password" size="20"><br>
age:<input type="text" name="age" size="20"><br>

<input type="submit" value="submit">

</form>


struts.xml 代码

<package name="hibernate" extends="struts-default">

<action name="savePerson" class="com.shengsiyuan.action.PsersonAction" method="savePerson">

<result name="success">/result.jsp</result>

</action>


PsersonAction.java 代码

package com.shengsiyuan.action;

import com.opensymphony.xwork2.ActionSupport;
import com.shengsiyuan.modle.Person;
import com.shengsiyuan.service.PersonService;
import com.shengsiyuan.service.PersonServiceImpl;

public class PsersonAction extends ActionSupport {

/**
* 
*/
private static final long serialVersionUID = 1L;

private String username;

private String password;

private int age;

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

public String savePerson() throws Exception{

Person person=new Person();

person.setUsername(username);
person.setPassword(password);
person.setAge(age);

java.sql.Date registerDate=new java.sql.Date(new java.util.Date().getTime());

person.setRegisterDate(registerDate);

PersonService personService=new PersonServiceImpl();

personService.savePerson(person);

return SUCCESS;
}

}

Person.java 代码

package com.shengsiyuan.modle;

import java.util.Date;

public class Person {

private Integer id;

private String username;

private String password;

private Integer age;

private Date registerDate;

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public Integer getAge() {
return age;
}

public void setAge(Integer age) {
this.age = age;
}

public Date getRegisterDate() {
return registerDate;
}

public void setRegisterDate(Date registerDate) {
this.registerDate = registerDate;
}

PersonServiceImpl.java 代码

package com.shengsiyuan.service;

import com.shengsiyuan.dao.PersonDAO;
import com.shengsiyuan.modle.Person;
import com.shengsiyuan.dao.PersonDAOImpl;

public class PersonServiceImpl implements PersonService
{
@Override
public void savePerson(Person person) 
{