web登录功能
- 登录
- 用户输入部分
- 向后台传入数据以及验证
- 实现登录验证码
登录
注意：这里需要将layui.css，layui.js，jquery.js，自行加入即可，希望这篇博客能给大家带来帮助。
用户输入部分
用户输入部分就是输入用户名，密码之类，不做过多说明，直接看代码
<div class="login-main">
<form class="layui-form" action="index.html" method="post">
<input name="submited" type="hidden" value="">
<div class="layui-form-item">
<!--<label class="login-icon"><i class="layui-icon"></i></label>-->
<input type="text" name="userName" lay-verify="userName" autocomplete="off" placeholder="这里输入登录名" class="layui-input">
</div>
<div class="layui-form-item">
<input type="password" name="password" lay-verify="password" autocomplete="off" placeholder="这里输入密码" class="layui-input">
</div>
<div>
<input type="text" name="captcha" id="captcha" placeholder=" 请输入验证码" autocomplete="off" class="layui-input admin-input admin-input-verify" value="">
<canvas id="canvas" width="100" height="43" class="admin-captcha"></canvas>
</div>
<div class="layui-form-item">
<div class="pull-left">
<button class="layui-btn layui-btn-primary" lay-submit lay-filter="login">登录</button>
<button type="reset" class="layui-btn layui-btn-primary">重置</button>
</div>
<div class="pull-right login-remember">
<label> 记住我 </label>
<input type="checkbox" name="rememberMe" value="true" lay-skin="switch" title="记住帐号"><div class="layui-unselect layui-form-switch"><i></i></div>
</div>
<div class="clear"></div>
</div>
</form>
</div>
向后台传入数据以及验证
向后台传入数据，这里使用的是layui+jquery,使用了layui 的输入验证，以及ajax向后台传入数据
<script>
$.ajaxSetup({
contentType: "application/x-www-form-urlencoded; charset=utf-8"
});
layui.use('form',function () {
var form = layui.form;
//layui表单验证
form.verify({
userName: function (value) {
if (value === '')
return '请输入用户名';
},
password: function (value) {
if (value === '')
return '请输入您的密码';
}
});
//传入后台数据
form.on('submit(login)',function (data) {
// 获取数据
console.log(data.field);
layer.alert(JSON.stringify(data.field));
// Ajax传到后台判断即可 具体略...
return false;
});
});
});
</script>
实现登录验证码
登录验证码，亲测可用
<script>
$(function(){
var show_num = [];
draw(show_num);
$("#canvas").on('click',function(){
draw(show_num);
})
$(".btn").on('click',function(){
var val = $(".input-val").val().toLowerCase();
var num = show_num.join("");
if(val==''){
alert('请输入验证码！');
}else if(val == num){
alert('提交成功！');
$(".input-val").val('');
draw(show_num);
}else{
alert('验证码错误！请重新输入！');
$(".input-val").val('');
draw(show_num);
}
})
})
function draw(show_num) {
var canvas_width=$('#canvas').width();
var canvas_height=$('#canvas').height();
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";
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之间的随机弧度
var txt = aCode[j];//得到随机的一个内容
show_num[i] = txt.toLowerCase();
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>
希望这篇博客能给大家带来帮助。
