【S2SH】怪有关问题！大神指点一上。

【S2SH】怪问题！！大神指点一下。。
S2SH配置没有问题，出现Action里面无法获取页面的值（不能自动装配），具体如下
实体类Empoyee代码：

package cn.jbit.jboa.entity;

/**
 * 员工 实体类。 
 * @author 
 * @version
 */
public class Employee implements java.io.Serializable {

	// Fields

	private static final long serialVersionUID = 5106663630382037556L;
	private String sn;
	private Position position;
	private Department department;
	private String password;
	private String name;
	private String status;

	// Constructors

	/** default constructor */
	public Employee() {
	}
	public Employee(String sn, Position position, Department department,
			String password, String name, String status) {
		super();
		this.sn = sn;
		this.position = position;
		this.department = department;
		this.password = password;
		this.name = name;
		this.status = status;
	}
	public String getSn() {
		return sn;
	}
	public void setSn(String sn) {
		this.sn = sn;
	}
	public Position getPosition() {
		return position;
	}
	public void setPosition(Position position) {
		this.position = position;
	}
	public Department getDepartment() {
		return department;
	}
	public void setDepartment(Department department) {
		this.department = department;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getStatus() {
		return status;
	}
	public void setStatus(String status) {
		this.status = status;
	}
}

login.jsp代码：

<s:form action="login">
			<s:textfield name="employee.name" label="用户名" />			
			<s:textfield name="employee.sn" label="编码"  value="12345"/>			
			<s:password name="employee.password" label="密码" />
			<input type="hidden" name="employee.status" value="...stat..."/>
			<s:submit value="登录"></s:submit>
		</s:form>

UserAction类

package cn.jbit.jboa.action;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.ServletActionContext;

import cn.jbit.jboa.constants.Constants;
import cn.jbit.jboa.entity.ClaimVoucher;
import cn.jbit.jboa.entity.Department;
import cn.jbit.jboa.entity.Employee;
import cn.jbit.jboa.entity.Position;
import cn.jbit.jboa.service.EmployeeService;
import cn.jbit.jboa.utils.MD5;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;