reqpwd.java

一个小型的BBS系统

package com.servlet;

import java.io.IOException;
import java.util.Vector;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import bean.dbwrite.DBWrite;
import bean.readdb.DBRead;

/**
 * Servlet implementation class for Servlet: ReqPwd
 *
 */
 public class ReqPwd extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
   static final long serialVersionUID = 1L;
   
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public ReqPwd() {
		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
	}  	
	
	/* (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
		String action = request.getParameter("action");
		
		String url;
		ServletContext sc = getServletContext();
		if(action.equals("getpwd")){
			String name = new String(request.getParameter("getname").getBytes("iso-8859-1"),"GB2312");
			Vector ques_ans = new Vector(); 
			DBRead dbr = new DBRead();
			ques_ans = dbr.DBReader_UserInfo(name);
			if(ques_ans.size()!=0){
			
				request.setAttribute("question", ques_ans);
				url="/answerquestion.jsp?userid="+name;
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
			else{
				url="/getpassword.jsp";
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
		}
		else if(action.equals("answer")){
			String answer = new String(request.getParameter("answer").getBytes("iso-8859-1"),"GB2312");
			String id = (String)request.getParameter("userid");
			Vector ques_ans = new Vector(); 
			DBRead dbr = new DBRead();
			ques_ans = dbr.DBReader_UserInfo(id);
			
			if(answer.equals((String)ques_ans.elementAt(3))){
				url="/modifypwd.jsp?userid="+id;
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
			else{
				request.setAttribute("question", ques_ans);
				url="/answerquestion.jsp?userid="+id;
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
		}
		else if(action.equals("resetpwd")){
			String id = (String)request.getParameter("userid");
			String pwd = (String)request.getParameter("pwd");
			String subpwd = (String)request.getParameter("subpwd");
			if(pwd.equals(subpwd)){
				DBWrite dbw = new DBWrite();
				dbw.UpdateUserPwd(id, pwd);
				url="/pwdmodifysucess.jsp";
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
			else{
				url="/resetpwderror.jsp?userid="+id;
				RequestDispatcher rd = sc.getRequestDispatcher(url);
				rd.forward(request, response);
			}
			
		}
	}   	  	    
}