js代码如下:
- 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'
- }]
- });
- },
- login:function() {
- this.fp.form.submit({
- waitMsg : '正在登录......',
- url : 'login.ejf?cmd=login',
- success : function(form, action) {
- window.location.href = 'manage.ejf';
- },
- failure : function(form, action) {
- form.reset();
- if (action.failureType == Ext.form.Action.SERVER_INVALID)
- Ext.MessageBox.alert('警告', action.result.errors.msg);
- }
- });
- },
- initComponent : function(){
-
- 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);
-
- }
- });
-
- Ext.onReady(function()
- {
- var win=new LoginWindow();
-
- win.show();
- var bd = Ext.getDom('randCode');
- var bd2 = Ext.get(bd.parentNode);
- bd2.createChild({tag: 'img', src: 'image.jsp',align:'absbottom'});
- }
- );
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'
}]
});
},
login:function() {
this.fp.form.submit({
waitMsg : '正在登录......',
url : 'login.ejf?cmd=login',
success : function(form, action) {
window.location.href = 'manage.ejf';
},
failure : function(form, action) {
form.reset();
if (action.failureType == Ext.form.Action.SERVER_INVALID)
Ext.MessageBox.alert('警告', action.result.errors.msg);
}
});
},
initComponent : function(){
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);
}
});
Ext.onReady(function()
{
var win=new LoginWindow();
win.show();
var bd = Ext.getDom('randCode');
var bd2 = Ext.get(bd.parentNode);
bd2.createChild({tag: 'img', src: 'image.jsp',align:'absbottom'});
}
);
css如下
- .user{ background:url(images/user.gif) no-repeat 1px 2px; }
- .key{ background:url(images/key.gif) no-repeat 1px 2px; }
- .rand{ background:url(images/rand.gif) no-repeat 1px 2px; }
- .key,.user,.rand{
- background-color:#FFFFFF;
- padding-left:20px;
- font-weight:bold;
- color:#000033;
- }
.user{ background:url(images/user.gif) no-repeat 1px 2px; }
.key{ background:url(images/key.gif) no-repeat 1px 2px; }
.rand{ background:url(images/rand.gif) no-repeat 1px 2px; }
.key,.user,.rand{
background-color:#FFFFFF;
padding-left:20px;
font-weight:bold;
color:#000033;
}
image.jsp
- <%@ 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){
- 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);
- }
- %>
- <%
-
- response.setHeader("Pragma","No-cache");
- response.setHeader("Cache-Control","no-cache");
- response.setDateHeader("Expires", 0);
-
-
- int width=60, height=20;
- BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
-
-
- Graphics g = image.getGraphics();
-
-
- Random random = new Random();
-
-
- g.setColor(getRandColor(200,250));
- g.fillRect(0, 0, width, height);
-
-
- g.setFont(new Font("Times New Roman",Font.PLAIN,18));
-
-
-
-
-
-
- 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);
- }
-
-
- String sRand="";
- for (int i=0;i<4;i++){
- String rand=String.valueOf(random.nextInt(10));
- sRand+=rand;
-
- g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
- g.drawString(rand,13*i+6,16);
- }
-
-
- session.setAttribute("rand",sRand);
-
-
- g.dispose();
- OutputStream output=response.getOutputStream();
-
-
- ImageIO.write(image, "JPEG", response.getOutputStream());
- output.flush();
- out.clear();
- out = pageContext.pushBody();
-
- %>
<%@ 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();
%>
调用很简单代码如下
- Ext.onReady(function(){
- var w = new LoginWin();
- 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'}]);
- });
效果如下