简单的ext 登录界面 (含验证码)
以下是一个简单的 ext 登录界面:
1. login.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta http-equiv='Expires' content='-10'>
<meta http-equiv='Pragma' content='No-cache'>
<title>系统登录</title>
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/ext-all.css" />
<link type="text/css" rel="stylesheet" href="<%=request.getContextPath()%>/css/mycss.css" />
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-base.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-all.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-lang-zh_CN-min.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/login.js"></script>
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/grid-examples.css" />
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/examples.css" />
<style type="text/css">
.user{ background:url(../images/user.gif) no-repeat 1px 2px; }
.key{ background:url(../images/key.gif) no-repeat 1px 2px; }
.user,.key,.key{background-color:#FFFFFF;padding-left:20px;font-weight:bold;color:#000033;}
</style>
</head>
<body>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta http-equiv='Expires' content='-10'>
<meta http-equiv='Pragma' content='No-cache'>
<title>系统登录</title>
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/ext-all.css" />
<link type="text/css" rel="stylesheet" href="<%=request.getContextPath()%>/css/mycss.css" />
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-base.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-all.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/ext-lang-zh_CN-min.js"></script>
<script type="text/javascript" charset="gb2312" src="<%=request.getContextPath() %>/js/login.js"></script>
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/grid-examples.css" />
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/css/examples.css" />
<style type="text/css">
.user{ background:url(../images/user.gif) no-repeat 1px 2px; }
.key{ background:url(../images/key.gif) no-repeat 1px 2px; }
.user,.key,.key{background-color:#FFFFFF;padding-left:20px;font-weight:bold;color:#000033;}
</style>
</head>
<body>
</body>
</html>
2. login.js (EXT 部分, 核心代码)
Ext.QuickTips.init();
LoginWindow=Ext.extend(Ext.Window,{
title : '登陆系统',
width : 265,
height : 170,
collapsible : true,
defaults : {
border : false
},
buttonAlign : 'center',
createFormPanel :function() {
return new Ext.form.FormPanel( {
bodyStyle : 'padding-top:6px',
defaultType : 'textfield',
labelAlign : 'right',
labelWidth : 55,
labelPad : 0,
frame : true,
defaults : {
allowBlank : false,
width : 158
},
items : [{
cls : 'user',
name : 'username',
fieldLabel : '帐号',
blankText : '帐号不能为空'
}, {
cls : 'key',
name : 'password',
fieldLabel : '密码',
blankText : '密码不能为空',
inputType : 'password'
}, {
cls : 'key',
name:'randCode',
id:'randCode',
fieldLabel:'验证码',
width:80,
blankText : '验证码不能为空'
}]
});
},
///登录
login:function() {
this.fp.form.submit({
waitMsg : '正在登录......',
url : 'login.do',
method : 'POST',
success : function(form, action) {
//Ext.Msg.alert('操作', action.result.data);
window.location.href = '/Lich/jsp/a.jsp';
},
failure : function(form, action) {
form.reset();
if (action.failureType == Ext.form.Action.SERVER_INVALID)
Ext.MessageBox.alert('警告', action.result.errors.msg);
}
});
},
///注册
regedit:function(){
window.location.href = "/Lich/jsp/regedit.jsp";
},
initComponent : function(){
this.keys = {
key : Ext.EventObject.ENTER,
fn : this.login,
scope : this
};
LoginWindow.superclass.initComponent.call(this);
this.fp=this.createFormPanel();
this.add(this.fp);
this.addButton('登陆',this.login,this);
this.addButton('重置', function(){this.fp.form.reset();},this);
this.addButton('注册',this.regedit,this);
}
});
Ext.onReady(function(){
var w = new LoginWindow();
w.show();
var bd = Ext.getDom('randCode');
var bd2 = Ext.get(bd.parentNode);
bd2.createChild([{tag:'span',html:' '},{tag: 'img', src: 'image.jsp',align:'absbottom'}]);
});
3. image.jsp ( 这部分用于生成验证码)
<%@ page contentType="image/jpeg" import="java.util.*,java.awt.*,java.io.*,java.awt.image.*,javax.imageio.*" pageEncoding="utf-8"%>
<%!
Color getRandColor(int fc,int bc){//给定范围获得随机颜色
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
%>
<%
//设置页面不缓存
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
// 在内存中创建图象
int width=60, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200,250));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
//画边框
//g.setColor(new Color());
//g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
// 取随机产生的认证码(4位数字)
String sRand="";
for (int i=0;i<4;i++){
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
// 将认证码显示到图象中
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));// 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
g.drawString(rand,13*i+6,16);
}
// 将认证码存入SESSION
session.setAttribute("rand",sRand);
// 图象生效
g.dispose();
OutputStream output=response.getOutputStream();
// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
output.flush();
out.clear();
out = pageContext.pushBody();
%>
