p1000101servlet.java

物流管理系统的登录模块及其他功能模块

package com.zzrd.j60.p100.servlet;

import java.io.IOException;
import java.io.Serializable;

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

import com.zzrd.j60.p100.dataaccessbean.P1000101DataAccessBean;
import com.zzrd.j60.p100.databean.MJ10P000DataBean;

/**
系统名：物流系统 <br>
功能概要: 用户信息检查 <br>
完成者: <br>
完成日: <br>
*/
public class P1000101Servlet extends HttpServlet implements Serializable {

	/**
	 * Constructor of the object.
	 */
	public P1000101Servlet() {
		super();
	}

	/**
	 * 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){

		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){
		try{
			/*变量定义和初始化*/
			String usrCd = nullToString(request.getParameter("txtUsrCd"));
			String passWord = nullToString(request.getParameter("txtPassWord"));
			String errFlg = "";
			P1000101DataAccessBean selectUsrMsg = new P1000101DataAccessBean();
			MJ10P000DataBean usrMsg = new MJ10P000DataBean();
			//检索用户信息
			usrMsg = selectUsrMsg.selUsrMsg(usrCd);
			/*判断用户信息*/
			if(usrMsg.getUSR_CD() != null){
				if(usrMsg.getPASSWORD().equals(passWord)){
					request.getRequestDispatcher("/exploded/j60p1000201.htm").forward(request, response);
				}else{
					errFlg = "password";
					request.setAttribute("errFlg", errFlg);
					request.setAttribute("usrCd", usrCd);
					request.getRequestDispatcher("/index.jsp").forward(request, response);
				}
			}else{	
				errFlg = "user";
				request.setAttribute("errFlg", errFlg);
				request.getRequestDispatcher("/index.jsp").forward(request, response);
			}
		/*错误处理*/
		}catch(Exception e){
			request.setAttribute("errPath", request.getServletPath());
			request.setAttribute("errContent", e.getMessage());
			try{
				request.getRequestDispatcher("/exploded/error.jsp").forward(request, response);
			}catch (Throwable f) {
    			String sPageForwardMsg = "画面迁移失败，请检验IE。";
    			System.err.println(sPageForwardMsg + ": " + f.getMessage());
    		}			
		}
	}
	
	/**
	 * 当String类型的变量值为NULL时，将其设为"" <br>
	 * @param str <br>
	 * @return String值 <br>
	 * 把空指针转化成课空字符
	 */
	public String nullToString(String str){
		if(str.trim().equalsIgnoreCase("") || str.equals(null)){
			str = "";
		}
		return str;
	}
}