clogin.java

Jsp做的网络邮件管理系统

package webMail.controller;



//import java.io.*;
import webMail.module.MLogin;
import java.util.*;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import webMail.CommonConst;

/**
 * Servlet implementation class for Servlet: CLogin
 *
 */
 public class CLogin extends webMail.DBCommon implements javax.servlet.Servlet {
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public CLogin() {
		super();
	}   	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doPost(request,response);
	}  	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
	{
		// TODO Auto-generated method stub
        // 设置提交表单的中文编码
        request.setCharacterEncoding("GBK");
        
        HttpSession  mySession = request.getSession(true);
        
        //清空错误消息
        mySession.setAttribute("errMsg","");
        
        //设置session中的页面值域
        mySession.setAttribute(CommonConst.VIEWID_LOGIN, new Hashtable() );
        
        //是否进入默认页面
        if ( !request.getParameterNames().hasMoreElements() )
        {
            response.sendRedirect("../VWebMail.jsp");
            return;
        }
        
        //得到用户输入信息
        String sUsername = request.getParameter("username");
        String sPassword = request.getParameter("password");

        //如果用户是提交表单
        if ( sUsername != null && sUsername.length() > 0 )
        {
            //校验用户输入信息
            MLogin mLogin = new MLogin();
            
            boolean bCheckResult = mLogin.GetUserInfo( mySession, sUsername, sPassword );
            if ( bCheckResult )
            {
                mySession.setAttribute("curPage","inbox");
                response.sendRedirect("CInbox");
            }
            else
            {
                response.sendRedirect("../VWebMail.jsp");
            }
        }
        //如果用户非法进入这个页面
        else
        {
            response.sendRedirect("../VWebMail.jsp");
        }
	}   	  	    
}