<%@ 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{
width: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！\n你输入的是: '+val+"\n正确的是: "+num+'\n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>
