<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <style> #header{ 98%; background-color:#e0e0e0; padding:50px 1% 50px 1%; } </style> <body> <div id=header> <div style="float:left;">系统管理</div> <div style="float:right;"><a href="">首页</a> <a href="">退出登录</a></div> </div> <button >系统管理</button> <button >前台用户</button> <button >后台管理</button> </body> </html> <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body> <% Object message = request.getAttribute("message"); if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <div align="center"> <h6 style="color: black;">管理员登陆</h6> <form name = "form1" action=AddServlet method="post" onsubmit="return check_submit()"> <table> <tr> <td>登陆账号</td> <td colspan="2"> <input type="text" id="id" name="id" maxlength="12" onblur="blur_id()" onfocus="focus_id()"/></td> <td width="300"><div id="result"></td> </tr> <tr> <td>登陆密码</td> <td colspan="2"> <input type="password" id="password" name="password" onblur="blur_pass()" onfocus="focus_pass()" /></td> <td width="300"><div id="result1"></td> </tr> <tr><td>验证码</td> <td> <input type="text" value="" placeholder="请输入验证码（区分大小写）" style="height:30px;position: relative; font-size:16px;"id ="text"> <canvas id="canvas" width="100" height="30" onclick="dj()" style="border: 1px solid #ccc; border-radius: 5px;"></canvas> <button type=submit class="btn" onclick="sublim()">提交</button> </td> </tr> </table> </form> </div> <script type="text/javascript"> /* 表单验证 */ var flag = false; // flag 如果为true（即用户名合法）就允许表单提交， 如果为false（即用户名不合法）阻止提交 function focus_pass() { var nameObj = document.getElementById("result1"); nameObj.innerHTML = "由六位字符和数字组成"; nameObj.style.color="#999"; } function blur_pass() { var nameObj = document.getElementById("result1"); // 判断用户名是否合法 var str2 = check_user_pass(document.form1.password.value); nameObj.style.color="red"; if ("密码合法" == str2) { flag = true; nameObj.innerHTML = str2; } else { nameObj.innerHTML = str2; } } function check_user_pass(str) { var str2 = "密码合法"; if ("" == str) { str2 = "密码为空"; return str2; } else if (str.length!=6) { str2 = "用户名应是六位组成"; return str2; } else if (!check_word(str)) { str2 = "未含有英文字符"; return str2; } return str2; } function focus_id() { var nameObj = document.getElementById("result"); nameObj.innerHTML = "由六到十二英文字符和数字组成"; nameObj.style.color="#999"; } function blur_id() { var nameObj = document.getElementById("result"); // 判断用户名是否合法 var str2 = check_user_id(document.form1.id.value); nameObj.style.color="red"; if ("用户名合法" == str2) { flag = true; nameObj.innerHTML = str2; } else { nameObj.innerHTML = str2; } } function check_user_id(str) { var str2 = "用户名合法"; if ("" == str) { str2 = "用户名号为空"; return str2; } else if ((str.length<=4)||(str.length>=12)) { str2 = "用户名应是六到十二位组成"; return str2; } else if (!check_word(str)) { str2 = "未含有英文字符"; return str2; } else if(!check_firstword(str)) { str2 = "必须以英文字母开头"; return str2; } return str2; } function check_firstword(str) { var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"]; for (var i = 0; i < arr.length; i++) { if (arr[i] == str.charAt(0)) { return true; } } return false; } function check_word(str) { var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"]; for (var i = 0; i < arr.length; i++) { for (var j = 0; j < str.length; j++) { if (arr[i] == str.charAt(j)) { return true; } } } return false; } // 验证用户名是否含有特殊字符 function check_other_char(str) { var arr = ["&", "\", "/", "*", ">", "<", "@", "!"]; for (var i = 0; i < arr.length; i++) { for (var j = 0; j < str.length; j++) { if (arr[i] == str.charAt(j)) { return true; } } } return false; } // 根据验证结果确认是否提交 function check_submit() { if (flag == false) { return false; } return true; } </script> </head> </body> <script> var show_num = []; draw(show_num); function dj(){ draw(show_num); } function sublim(){ var val=document.getElementById("text").value; var num = show_num.join(""); if(val==''){ alert('请输入验证码！'); }else if(val == num){ alert('提交成功！'); document.getElementById(".input-val").val(''); draw(show_num); }else{ alert('验证码错误！ 你输入的是: '+val+" 正确的是: "+num+' 请重新输入！'); document.getElementById("text").value=''; draw(show_num); } } function draw(show_num) { var canvas_width=document.getElementById('canvas').clientWidth; var canvas_height=document.getElementById('canvas').clientHeight; var canvas = document.getElementById("canvas");//获取到canvas的对象，演员 var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台 canvas.width = canvas_width; canvas.height = canvas_height; var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0,q,w,e,r,t,y,u,i,o,p,a,s,d,f,g,h,j,k,l,z,x,c,v,b,n,m"; var aCode = sCode.split(","); var aLength = aCode.length;//获取到数组的长度 for (var i = 0; i <= 3; i++) { var j = Math.floor(Math.random() * aLength);//获取到随机的索引值 var deg = Math.random() * 30 * Math.PI / 180;//产生0~30 var txt = aCode[j];//得到随机的一个内容 show_num[i] = txt; var x = 10 + i * 20;//文字在canvas上的x坐标 var y = 20 + Math.random() * 8;//文字在canvas上的y坐标 context.font = "bold 23px 微软雅黑"; context.translate(x, y); context.rotate(deg); context.fillStyle = randomColor(); context.fillText(txt, 0, 0); context.rotate(-deg); context.translate(-x, -y); } for (var i = 0; i <= 5; i++) { //验证码上显示线条 context.strokeStyle = randomColor(); context.beginPath(); context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height); context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height); context.stroke(); } for (var i = 0; i <= 30; i++) { //验证码上显示小点 context.strokeStyle = randomColor(); context.beginPath(); var x = Math.random() * canvas_width; var y = Math.random() * canvas_height; context.moveTo(x, y); context.lineTo(x + 1, y + 1); context.stroke(); } } function randomColor() {//得到随机的颜色值 var r = Math.floor(Math.random() * 256); var g = Math.floor(Math.random() * 256); var b = Math.floor(Math.random() * 256); return "rgb(" + r + "," + g + "," + b + ")"; } </script> </html>