package com.loan.modules.storeconf.lbtsysorgruleregion.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;
/**
* 生成登录验证码
* @author xj
*
*/
@Controller
@RequestMapping("api/backgd/system/code")
public class CodeController {
private int width = 90;// 定义图片的width
private int height = 30;// 定义图片的height
private int codeCount = 4;// 定义图片上显示验证码的个数
private int xx = 15;
private int fontHeight = 18;
private int codeY = 20;
char[] codeSequence = { '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', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
@RequestMapping("/code")
public void getCode(HttpServletRequest req, HttpServletResponse resp){
// 定义图像buffer
BufferedImage buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics gd = buffImg.getGraphics();
// 创建一个随机数生成器类
Random random = new Random();
// 将图像填充为白色
gd.setColor(Color.WHITE);
gd.fillRect(0, 0, width, height);
// 创建字体，字体的大小应该根据图片的高度来定。
Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
// 设置字体。
gd.setFont(font);
// 画边框。
gd.setColor(Color.BLACK);
gd.drawRect(0, 0, width - 1, height - 1);
// 随机产生40条干扰线，使图象中的认证码不易被其它程序探测到。d
gd.setColor(Color.BLACK);
for (int i = 0; i < 10; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
gd.drawLine(x, y, x + xl, y + yl);
}
// randomCode用于保存随机产生的验证码，以便用户登录后进行验证。
StringBuffer randomCode = new StringBuffer();
int red = 0, green = 0, blue = 0;
// 随机产生codeCount数字的验证码。
for (int i = 0; i < codeCount; i++) {
// 得到随机产生的验证码数字。
String code = String.valueOf(codeSequence[random.nextInt(codeSequence.length-1)]);
// 产生随机的颜色分量来构造颜色值，这样输出的每位数字的颜色值都将不同。
red = random.nextInt(255);
green = random.nextInt(255);
blue = random.nextInt(255);
// 用随机产生的颜色将验证码绘制到图像中。
gd.setColor(new Color(red, green, blue));
gd.drawString(code, (i + 1) * xx, codeY);
// 将产生的四个随机数组合在一起。
randomCode.append(code);
}
// 将四位数字的验证码保存到Session中。
HttpSession session = req.getSession();
session.setAttribute("code", randomCode.toString());
// 禁止图像缓存。
resp.setHeader("Pragma", "no-cache");
resp.setHeader("Cache-Control", "no-cache");
resp.setDateHeader("Expires", 0);
resp.setContentType("image/jpeg");
try{
// 将图像输出到Servlet输出流中。
ServletOutputStream sos = resp.getOutputStream();
ImageIO.write(buffImg, "jpeg", sos);
sos.close();
}catch(Exception ex){
ex.printStackTrace();
}
}
}
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ include file="/commons/global.jsp" %>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description"
content="Sentir, Responsive admin and dashboard UI kits template">
<meta name="keywords"
content="admin,bootstrap,template,responsive admin,dashboard template,web apps template">
<meta name="author"
content="Ari Rusmanto, Isoh Design Studio, Warung Themes">
<title>${fns:getSite().title}登录</title>
<jsp:include page="/commons/style.jsp"></jsp:include>
<script type="text/javascript">
function changeImg() {
var imgSrc = $("#codeImg");
var src = imgSrc.attr("src");
imgSrc.attr("src", chgUrl(src));
}
//加入时间戳，去缓存机制
function chgUrl(url) {
var timestamp = (new Date()).valueOf();if ((url.indexOf("&") >= 0)) {
url = url + "×tamp=" + timestamp;
} else {
url = url + "?timestamp=" + timestamp;
}
return url;
}
document.onkeydown=function(event){
var e = event || window.event || arguments.callee.caller.arguments[0];
if(e && e.keyCode==13){ // enter 键
loginFun();
}
};
function loginFun(){
if($("#userName").val()==""){
layer.tips('请输入账号!', '#userName');
}else if($("#userPass").val()==""){
layer.tips('请输入密码!', '#userPass');
}else if($("#userCode").val()==""){
layer.tips('请输验证码!', '#userCode');
}else{
sendAjax("${pageContext.request.contextPath}/backgd/system/login/login", $("#myform")
.serializeArray(), function(data) {
if (data.result) {
layer.load();
setTimeout(function(){
window.location.href="${pageContext.request.contextPath}/backgd/system/systemHome/home";
}, 10);
} else {
layer.msg(data.msg, {icon: 5});
}
});
}
};
</script>
</head>
<body class="login tooltips">
<div class="login-header text-center" align="center">
<img
src="${pageContext.request.contextPath}/style/admin/assets/img/logo-login.png"
class="logo" alt="Logo">
</div>
<div class="login-wrapper">
<!-- <div class="alert alert-warning alert-bold-border fade in alert-dismissable">
<button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
<strong>提示!</strong> Better check yourself, you're <a href="#fakelink" class="alert-link">not looking too good</a>.
</div> -->
<div style="height: 20px"></div>
<form role="form" action="index.html" id="myform" style="margin: 20px">
<div class="form-group has-feedback lg left-feedback no-label">
<input id="userName" name="userName" type="text" value=""
class="form-control no-border input-lg rounded"
placeholder="输入您的账号" autofocus> <span
class="fa fa-user form-control-feedback"></span>
</div>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
<div class="form-group has-feedback lg left-feedback no-label">
<input id="userPass" name="userPass" type="password"
class="form-control no-border input-lg rounded"
placeholder="输入您的密码" value=""> <span
class="fa fa-unlock-alt form-control-feedback"></span>
</div>
<div>
<div class="form-group" style="float: left;width: 60%">
<input id="userCode" name="userCode" type="text"
class="form-control no-border input-lg rounded"
placeholder="输入验证码">
</div>
<img style="margin-left: 10px;margin-top:8px;cursor: pointer;" id="codeImg" title="看不清换一张" alt="验证码" src="${pageContext.request.contextPath}/backgd/system/code/code" onclick="changeImg()"/>
</div>
<div class="form-group">
<button onclick="loginFun()" type="button"
class="btn btn-warning btn-lg btn-perspective btn-block">登录</button>
</div>
</form>
</div>
<div class="loginbm">
${fns:getSite().copyright}
</div>
</body>
</html>
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