验证码有关问题_为什么在火狐浏览器下能运行而IE和360等浏览器却不能成功运行

2012-09-24

验证码问题___为什么在火狐浏览器上能运行而IE和360等浏览器却不能成功运行我在调试一个验证码生成和验证

验证码问题___为什么在火狐浏览器上能运行而IE和360等浏览器却不能成功运行
我在调试一个验证码生成和验证的jsp页面时发现代码在firefox上能够成功运行，而在ie和360等上面却不能成功运行

代码：
//-----------------------------------------------------image.jsp----------------------------------------------------
<%@ page contentType="image/jpeg" import="java.awt.*,
java.awt.image.*,java.util.*,javax.imageio.*" %>
<%!
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.removeAttribute("rand");
session.setAttribute("rand",sRand);
// 图象生效
g.dispose();

// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
%>

//--------------------------------------------Register.jsp------------------------------------------------------
<%@ page language="java" contentType="text/html; charset=gb2312"
import="java.util.*"%>
<%@ page import="javax.swing.*" %>
<%@ page import="java.sql.*" %>
<html>
<head>
<title>用户注册</title>
</head>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<script language="javascript">

function query(){
var userid = document.getElementById("userid");
var queryhref = document.getElementById("useridquery");
queryhref.href = "UserQuery.jsp?userid="+userid.value;
}
function validateCodeWroung(){
alert("验证码输入有误！");
}
function validateCodeRight(){
alert("验证码输入正确！");
}
</script>
<%
String validateCode = (String)session.getAttribute("rand");
String inputCode = request.getParameter("inputCode");
out.print(validateCode);

out.print(inputCode);
if(validateCode!=null && inputCode!=null)
{
if(validateCode.equals(inputCode))
{%>
<script language="javascript">validateCodeRight();</script>
<%}
else
{%>
<script language="javascript">validateCodeWroung();</script>
<%}
}
%>
<body>
<form onSubmit="return check()" name="registerform" action="Registr.jsp" method="post">
<table width="667" border="0" cellspacing="0">
<tr>
<th width="140" scope="col"></th>
<th width="193" scope="col"></th>
<th width="171" scope="col"></th>
<th width="155" scope="col"><br><br></th>
</tr>
<tr>
<th scope="row"> </th>
<td>
用户名(3-30)：</td>
<td>
<label>
<input type="text" name="userid" id="userid" />
</label></td>
<td>
*       
    
<a id="useridquery" target="_blank"onClick="query();" href="####">检测</a></td>
</tr>
<tr>
<th scope="row"> </th>
<td>
密码(6-20)：</td>
<td>
<label>
<input type="password" name="password1" id="password1" />
</label></td>
<td>
*</td>
</tr>
<tr>
<th scope="row"> </th>
<td>
密码确认：</td>
<td>
<label>
<input type="password" name="password2" id="password2" />
</label></td>
<td>
*</td>
</tr>
<tr>
<th scope="row"> </th>
<td>
性别：</td>
<td>
<label>
<input type="radio" name="radio" id="sex" value="male" />
男
<input type="radio" name="radio" id="female" value="female" />
女</label></td>
<td>
*</td>
</tr>
<tr>
<th scope="row"> </th>
<td>
省份选择：</td>
<td>
<select name="province_select" size="1">
<option>
---请选择---</option>
</select></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
城市：</td>
<td>
<select name="city_select" size="1">
<option>
---请选择---</option>
</select></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
县/区:</td>
<td>
<select name="county_select" size="1">

<option>
---请选择---</option>
</select></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
出生年/月/日:</td>
<td>
<label>
<input type="text" name="birthday" id="birthday" />
</label></td>
<td>
*</td>
</tr>
<tr>
<th scope="row"> </th>
<td>
E_Mail:</td>
<td>
<label>
<input type="text" name="e_mail" id="e_mail" />
</label></td>
<td>
*</td>
</tr>
<tr>
<th scope="row"> </th>
<td>
手机号码：</td>
<td>
<label>
<input type="text" name="telephone_number" id="telephone_number" />
</label></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
固定电话：</td>
<td>
<label>
<input type="text" name="phone_number" id="phone_number" />
</label></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
验证码：</td>
<td>
<img src="image.jsp?_sed=<%=new java.util.Date().getTime()%>"></td>
<td></td>
</tr>

<tr>
<th scope="row"> </th>
<td>请输入验证码：</td>
<td><input type="text" name="inputCode" id="inputCode" /></td>
<td> </td>
</tr>
<tr>
<th scope="row"> </th>
<td>
               
<input type="submit" name="submit" value="提交" ></td>
<td>
             
<input type="reset" name="reset" value="重置"></td>
<td> </td>
</tr>
</table>
</form>
</body>
</html>

在火狐上运行能够获取session值，而在IE和360上却不能获取session值。这是为什么？？

希望各位大侠帮我调试，找出原因！！！

先谢谢了。

[解决办法]

Java code

out.clear();  out = pageContext.pushBody();
[解决办法]
判断输入的验证码是否正确可以写个serlet，用ajax去判断啊，写得让人难以理解！

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验证码有关问题_为什么在火狐浏览器下能运行而IE和360等浏览器却不能成功运行