loginaction.java

一个简单的AJAX图书展示平台

package com.ascent.struts.action;

import java.util.List;
import java.util.Iterator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionMessages;

import com.ascent.struts.form.LoginForm;
import com.ascent.bean.Loginvip;
import com.ascent.util.checkUser;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
/** 
 * MyEclipse Struts
 * Creation date: 03-06-2007
 * 
 * XDoclet definition:
 * @struts.action path="/login" name="loginForm" input="login.jsp" scope="request" validate="true"
 * @struts.action-forward name="loginOk" path="loginOk.jsp"
 * @struts.action-forward name="loginError" path="loginError"
 */
public class LoginAction extends BaseAction 
{
	//事例日志器,用与记录日志
	private static final Logger LOGGER=LogManager.getLogger(LoginAction.class);
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) 
	{
		//事例化一个表单BEAN,用于传递表单数据
		LoginForm loginform = (LoginForm)form;// TODO Auto-generated method stub
		//事例化一个Action错误.记录错误信息
		ActionErrors errors=new ActionErrors();
		//判断表单BEAN是否为空
		if(loginform.equals(null))
		{	
		  return mapping.findForward("login");
		}
		else
		{
            //从表单BEAN中获取用户名和密码
			String name=loginform.getName();
			String password=loginform.getPassword();
			
			//使用定义的日志器,加入新的日志
			LOGGER.debug("取得表单数据成功");
            //通过基层ACTION取得SPRING注册BEAN得到服务层,根据用户名查找
			//返回一个持久类的列表.
			List use=this.getLoginService().findLoginByName(name);	
			//判断列表是否为空,
			if(!use.isEmpty())
			{
				//将列表迭代器化,用于循环输出
				Iterator It=use.iterator();
				
                //	判断迭代器中是否有下一项
				while(It.hasNext())
				{
					//事例化一个持久BEAN,用于存储迭代器NEXT()后的持久类
					Loginvip loginvip=new Loginvip();
					loginvip=(Loginvip)It.next();
					//从查询出来的持久类中取得数据与表单BEAN中的对比
					if(loginvip.getName().equals(name) && loginvip.getPassword().equals(password))
					{
						checkUser checkuser=new checkUser();
						checkuser.setisLogin(true);
						request.getSession().setAttribute("check",checkuser);
						return mapping.findForward("books");
					}
				}
		    }
			else
			{
				
				return mapping.findForward("login");
			}
		}	
		return mapping.findForward("login");													
	}
}