【笔记】验证码的使用
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【页面】
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>艾特|后台登录</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <link rel="stylesheet" type="text/css" href="Admin/Css/login.css"> <script type="text/javascript" src="Admin/Js/login.js"></script> <script type="text/javascript"> function changeCode(obj){ obj.src="code?id="+Math.random(); } function changex(obj){ obj.style.cursor="pointer"; } </script></head><body> <% Cookie[] cookies = request.getCookies(); if(cookies!=null){ for(Cookie cookie : cookies){ if(cookie.getName().equals("myNR")){ String[] str=cookie.getValue().split(":"); session.setAttribute("athl_name", str[0]); session.setAttribute("athl_role", Integer.valueOf(str[1])); response.sendRedirect("index.jsp"); return; } } } String msg=(String)request.getAttribute("msg"); %> <div id="login_frame"> <div class="headPhoto"><img src="${pageContext.request.contextPath }/Admin/Images/head.jpg"></div> <span id="hint"> <c:if test="${not empty msg }"> <c:out value="${msg }"></c:out> </c:if> </span> <form id="login" class="login_form" action="login" method="post"> <div class="login_input_panel"> <div class="login_input"> <i class="icon-user"></i> <input type="text" placeholder="账号" id="username" name="username"/> </div> <div class="login_input"> <i class="icon-lock" style="left: 8%"></i> <input type="password" placeholder="密码" id="pwd" name="password" /> </div> <div class="login_input"> <i class="icon-barcode"></i> <input type="text" placeholder="验证码" name="code"/> </div> <div class="mycookie"> <label> <input name="mycookie" class="cooinput" type="checkbox" value="1">自动登录 </label> <label> <img src="code" id="code" onmouseover="changex(this)" onclick="changeCode(this)" alt="点击更换" title="点击更换" /> </label> </div> </div> <div class="login_btn"> <input type="submit" id="login" class="submit" value="登录"/> </div> </form> </div> </body></html>【servlet】
package com.athl.servlet;import java.io.IOException;import java.util.List;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import com.athl.dao.AdminDao;import com.athl.dao.RolesDao;public class AdminServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String url = request.getRequestURI().toString(); if (url.endsWith("login")) { this.login(request, response); } else if (url.endsWith("logout")) { this.logout(request, response); } else if (url.endsWith("getAdminAll")) { this.getAdminAll(request, response); } else if (url.endsWith("delete")) { this.delete(request, response); } else if (url.endsWith("unblock")) { this.unblock(request, response); } else if (url.endsWith("block")) { this.block(request, response); } else if (url.endsWith("addAdmin")) { this.addAdmin(request, response); } else if (url.endsWith("updateAdmin")) { this.updateAdmin(request, response); } else if (url.endsWith("initAddAdmin")) { this.initAddAdmin(request, response); } else if (url.endsWith("initUpdateAdmin")) { this.initUpdateAdmin(request, response); } } /** * 初始化管理员修改页面 * @param request * @param response * @throws ServletException * @throws IOException */ private void initUpdateAdmin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int adId=Integer.valueOf(request.getParameter("id")); List<Map<String,Object>> lmr =new RolesDao().getRolesAll(); request.setAttribute("adId", adId); request.setAttribute("lmr", lmr); //请求转发 request.getRequestDispatcher("Admin/updateAdmin.jsp").forward(request, response); } /** * 初始化管理员添加页面 * @param request * @param response * @throws ServletException * @throws IOException */ private void initAddAdmin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { List<Map<String,Object>> lmr =new RolesDao().getRolesAll(); request.setAttribute("lmr", lmr); request.getRequestDispatcher("Admin/addAdmin.jsp").forward(request, response); } /** * 修改 * @param request * @param response * @throws ServletException * @throws IOException */ private void updateAdmin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); int adId=Integer.valueOf(request.getParameter("adId")); String name=request.getParameter("adName"); String pwd=request.getParameter("adPwd"); String pwd1=request.getParameter("adPwd1"); int roleId=Integer.valueOf(request.getParameter("roleId")); System.out.println(name+" "+pwd+" "+pwd1+" "+roleId); if(name==null||pwd==null||pwd1==null||roleId==0||"".equals(name)||"".equals(pwd)||"".equals(pwd1)){ request.setAttribute("msg","请确保信息的完整性！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else if(pwd.equals(pwd1)){ boolean isOk=new AdminDao().updateAdmin(adId, roleId, name, pwd); if(isOk){ request.setAttribute("msg","添加操作成功！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else{ request.setAttribute("msg","添加操作失败了！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } }else{ request.setAttribute("msg","两次密码不一致！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } } /** * 添加 * @param request * @param response * @throws ServletException * @throws IOException */ private void addAdmin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String name=request.getParameter("adName"); String pwd=request.getParameter("adPwd"); String pwd1=request.getParameter("adPwd1"); int roleId=Integer.valueOf(request.getParameter("roleId")); System.out.println(name+" "+pwd+" "+pwd1+" "+roleId); if(name==null||pwd==null||pwd1==null||roleId==0||"".equals(name)||"".equals(pwd)||"".equals(pwd1)){ request.setAttribute("msg","请确保信息的完整性！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else if(pwd.equals(pwd1)){ boolean isOk=new AdminDao().addAdmin(roleId, name, pwd); if(isOk){ request.setAttribute("msg","添加操作成功！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else{ request.setAttribute("msg","添加操作失败了！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } }else{ request.setAttribute("msg","两次密码不一致！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } } /** * 锁定 * @param request * @param response * @throws ServletException * @throws IOException */ private void block(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id=Integer.valueOf(request.getParameter("id")); boolean isOk=new AdminDao().block(id); if(isOk){ request.setAttribute("msg","锁定操作成功！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else{ request.setAttribute("msg","锁定操作失败了！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } } /** * 解锁 * @param request * @param response * @throws ServletException * @throws IOException */ private void unblock(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id=Integer.valueOf(request.getParameter("id")); boolean isOk=new AdminDao().unblock(id); if(isOk){ request.setAttribute("msg","解锁操作成功！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else{ request.setAttribute("msg","解锁操作失败了！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } } /** * 删除 * @param request * @param response * @throws ServletException * @throws IOException */ private void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); int id=Integer.valueOf(request.getParameter("id")); boolean isOk=new AdminDao().delete(id); if(isOk){ request.setAttribute("msg","删除操作成功！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); }else{ request.setAttribute("msg","删除操作失败了！"); request.setAttribute("url","3;URL=getAdminAll"); request.getRequestDispatcher("Admin/msg.jsp").forward(request, response); } } /** * 获得管理员列表 * @param request * @param response * @throws ServletException * @throws IOException */ private void getAdminAll(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { List<Map<String, Object>> lma =new AdminDao().getAdminAll(); request.setAttribute("lma", lma); request.getRequestDispatcher("Admin/rolesList.jsp").forward(request, response); } /** * 注销 * @param request * @param response * @throws ServletException * @throws IOException */ private void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); session.removeAttribute("athl_name"); session.removeAttribute("athl_role"); Cookie[] cookies =request.getCookies(); if(cookies!=null){ Cookie cook = new Cookie("myNR",""); cook.setMaxAge(0); response.addCookie(cook); } response.sendRedirect("Admin/login.jsp"); } /** * 登录 * @param request * @param response * @throws ServletException * @throws IOException */ private void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /*request.setCharacterEncoding("utf-8");*/ String name = request.getParameter("username"); String pwd = request.getParameter("password"); String code = request.getParameter("code"); String mycookie = request.getParameter("mycookie"); String ip = request.getRemoteAddr(); if ("".equals(name) || "".equals(pwd) || "".equals(code)) { request.setAttribute("msg", "账户、密码、验证码不能为空！"); request.getRequestDispatcher("./Admin/login.jsp").forward(request, response); } else { int b = new AdminDao().login(name, pwd, ip); HttpSession session = request.getSession(); String sessionCode = (String) session.getAttribute("safecode"); if (b == 1 && sessionCode.equals(code)) { int role = new AdminDao().checkRole(name); session.setAttribute("athl_name", name); session.setAttribute("athl_role", role); if ("1".equals(mycookie)) { Cookie cook = new Cookie("myNR", name + ":" + role); cook.setMaxAge(60*60*24); response.addCookie(cook); } response.sendRedirect("Admin/index.jsp"); } else if (b == 0 && sessionCode.equals(code)) { request.setAttribute("msg", "该账户已被管理员锁定，请联系管理员！"); request.getRequestDispatcher("./Admin/login.jsp").forward( request, response); } else { request.setAttribute("msg", "账户、密码、验证码错误！ 或 该账户不存在！"); request.getRequestDispatcher("./Admin/login.jsp").forward( request, response); } } }}谢谢支持！
资源下载：http://download.csdn.net/detail/jul_11th/9791947
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