loginservlet.java

J2ee开发的 人事管理系统 使用oracle数据库 myeclips平台开发

package com.galaxy.controller;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

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

import com.galaxy.dao.LoginDao;
import com.galaxy.dao.UserInfoDAO;
import com.galaxy.vo.UserInfoVO;

public class LoginServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
		
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		response.setCharacterEncoding("gb2312");
		
		//从前台获取用户名和密码信息
		String username = request.getParameter("username");
		String userpsw = request.getParameter("userpswd");
		
		//查询数据库中的用户信息
		UserInfoDAO uiDao = new UserInfoDAO();
		UserInfoVO uivo = new UserInfoVO();
		
		List userList = new ArrayList();
		String condition = " and ui_loadname = '" + username + 
		"' and ui_password = '" + userpsw + "'";
		userList = uiDao.queryByCondition(condition);
		if(userList != null)
		{
			for(int i=0; i < userList.size(); i++)
			{
				uivo = (UserInfoVO)userList.get(i);			
				break;
			}
		}
		/**验证从数据库提取出来的用户数据，是否有效
		 */		
				
		//判断用户是否存在，然后决定跳转与否
		if( (uivo.getUiRealname()!= null) && !("".equals(uivo.getUiRealname()))
			&& uivo.getUiPassword() != null	&& !("".equals(uivo.getUiPassword())))
		{
			//把用户角色信息信息保存在session里，随其转发	
			HashMap upHashMap = getUserPriorityHashMap(uivo.getUiId());
			request.getSession().setAttribute("upHashMap", upHashMap);
			
			String [] menuInfo = getMenuInfos(upHashMap); 
			request.getSession().setAttribute("item_word", menuInfo[0]);
			request.getSession().setAttribute("item_link", menuInfo[1]);
			request.getSession().setAttribute("supermenu_num", menuInfo[2]);

			request.setAttribute("errorMsg", "");
			request.getRequestDispatcher("frameset.jsp").forward(request, response);			
		}
		else
		{
			request.setAttribute("errorMsg", "登陆信息错误，请重新输入！");
			request.getRequestDispatcher("login.jsp").forward(request, response);
		}
	}
	
	/**
	 *@ 根据用户信息，把用户的ID，姓名，登陆名，角色ID，是否是管理员，能访问的系统模块，
	 *存入一个HashMap的结构体里
	 *结构体的key值分别是：U_ID, U_Name, U_LoadName, U_RoleID, U_IsAdmin， &
	 * 和数据库中存入的各模块名
	 *模块名(KEY)对应的值为'0,1'，'0'表示不能访问,'1'表示能访问
	 */
	 public static HashMap getUserPriorityHashMap(Long userID)
	 {
		 HashMap upHashMap = new HashMap();
		 
		 LoginDao ld = new LoginDao();
		 upHashMap = ld.getUserPriorityInfo(userID);
		 		 
		 return upHashMap;
	 }
	
	 /**
	  * 计算前台菜单信息，返回数组的第一个串是前台菜单名字
	  * 第二个串是前台菜单的链接路径
	  * 第三个串是前台顶级菜单的个数
	  */
	 public static String[] getMenuInfos(HashMap upHashMap)
	 {	
		 //计算顶级菜单的个数
		 int supermenu_num = 0;
		 String [] menuInfo = new String[3];
		 menuInfo[0]="";
		 menuInfo[1]="";
		 menuInfo[2]="";
		 
		 Long roleID = (Long)upHashMap.get("U_RoleID");


		 
		 //人员档案模块
		 if("1".equals(upHashMap.get("人员档案")))
		 { 	 
			 supermenu_num += 1;
			 
			 menuInfo[0] +="||||";
			 menuInfo[1] +="||||"; 
			 
			 if("1".equals(upHashMap.get("基本信息")))
			 {
				 menuInfo[0] +="&基本信息";
				 menuInfo[1] +="%PA_UserInfoServlet?opflag=query";
			 }
			 if("1".equals(upHashMap.get("员工档案")))
			 {		
				 menuInfo[0] +="&员工档案";
				 menuInfo[1] +="%PA_EmployeeFileServlet?opflag=query";
			 }
			 if("1".equals(upHashMap.get("员工履历")))
			 {	
				 menuInfo[0] +="&员工履历";
				 menuInfo[1] +="%PA_EmployeeRecordServlet?opflag=query&currentpage=1&cond=&ui_name=";
			 }
			 if("1".equals(upHashMap.get("员工合同")))
			 {			 
				 menuInfo[0] +="&员工合同";
				 menuInfo[1] +="%PA_EmployeeContractServlet?opflag=query&currentpage=1&selectdep=&ui_name=";
			 }
			 if("1".equals(upHashMap.get("奖惩管理")))
			 {			 
				 menuInfo[0] +="&奖惩管理";
				 menuInfo[1] +="%PA_RewardPunishmentServlet?opflag=query&currentpage=1";
			 }			 
		 }
		 //人事调配模块
		 ////////////////////////////////////////////////////
		 if("1".equals(upHashMap.get("人事调配")))
		 {
			 supermenu_num += 1;
			 
			 menuInfo[0] +="||||";
			 menuInfo[1] +="||||";
			 
			 if("1".equals(upHashMap.get("人事调动管理")))
			 {			 
				 menuInfo[0] +="&人事调动管理";
				 menuInfo[1] +="%psl_dispatch//PD_MainDispatchServlet?opflag=";
			 }
			 if("1".equals(upHashMap.get("离退人员管理")))
			 {			 
				 menuInfo[0] +="&离退人员管理";
				 menuInfo[1] +="%psl_dispatch//PD_DispatchQueryServlet?opflag=retireload";
			 }
			 if("1".equals(upHashMap.get("人事调配查询")))
			 {			 
				 menuInfo[0] +="&人事调配查询";
				 menuInfo[1] +="%psl_dispatch//PD_DispatchQueryServlet?opflag=login";
			 }
			 
		 }
		 //教育培训模块
		 /////////////////////////////////////////////////////
		 if("1".equals(upHashMap.get("教育培训")))
		 {
			 supermenu_num += 1;
			 
			 menuInfo[0] +="||||";
			 menuInfo[1] +="||||";
			 
			 if("1".equals(upHashMap.get("员工培训报名")))
			 {			 
				 menuInfo[0] +="&员工培训报名";
				 menuInfo[1] +="%training//TrainRegister.jsp";
			 }
			 if("1".equals(upHashMap.get("报名信息")))
			 {		
				 menuInfo[0] +="&报名信息";
				 menuInfo[1] +="%training//TR_TrainRegisterServlet?opraParam=trainregister";
			 }
			 if("1".equals(upHashMap.get("培训类别维护")))
			 {			 
				 menuInfo[0] +="&培训类别维护";
				 menuInfo[1] +="%training//TR_TrainClassServlet?opraParam=trainclass";
			 }
			 if("1".equals(upHashMap.get("培训记录")))
			 {		
				 menuInfo[0] +="&培训记录";
				 menuInfo[1] +="%training//TR_TrainRecordServlet?opraParam=trainrecord";
			 }
			 if("1".equals(upHashMap.get("培训人员及成绩")))
			 {			 
				 menuInfo[0] +="&培训人员及成绩";
				 menuInfo[1] +="%training//TR_TrainScoreServlet?opraParam=trainscore";
			 }
			 if("1".equals(upHashMap.get("员工证书记录")))
			 {			 
				 menuInfo[0] +="&员工证书记录";
				 menuInfo[1] +="%training//TR_CertRecordServlet?opFlag=init";
			 }			 
		 }
		 //系统管理模块
		 /////////////////////////////////////////////////////
		 if("1".equals(upHashMap.get("系统管理")))
		 {			 
			 supermenu_num += 1;
			 
			 menuInfo[0] +="||||";
			 menuInfo[1] +="||||";
			 
			 if("1".equals(upHashMap.get("机构级别维护")))
			 {			 
				 menuInfo[0] +="&机构级别维护";
				 menuInfo[1] +="%SM_LevelInfoServlet?opflag=init";
			 }
			 if("1".equals(upHashMap.get("机构信息维护")))
			 {	
				 menuInfo[0] +="&机构信息维护";
				 menuInfo[1] +="%SM_DeptInfoServlet?opflag=init";
			 }
			 if("1".equals(upHashMap.get("用户管理")))
			 {			 
				 menuInfo[0] +="&用户管理";
				 menuInfo[1] +="%SM_UserInfoServlet?opflag=init";
			 }
			 if("1".equals(upHashMap.get("角色管理")))
			 {			 
				 menuInfo[0] +="&角色管理";
				 menuInfo[1] +="%SM_RoleInfoServlet?opflag=init";
			 }
			 if("1".equals(upHashMap.get("系统模块管理")))
			 {			 
				 menuInfo[0] +="&系统模块管理";
				 menuInfo[1] +="%sys_manage//sys_modelmanage_show.jsp";
			 }	
		 }
		 ///////////////////////////////
		 //去掉字符串前端的字符"||||"
		 menuInfo[0] = menuInfo[0].substring(4);
		 menuInfo[1] = menuInfo[1].substring(4);	 
		 menuInfo[2] = String.valueOf(supermenu_num);
		 //////////////////////////////////
		 
		 return menuInfo;
	 }

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}