谁帮我看下 servlet的配置是怎么回事啊？

我在company项目的com包下建了个 PictureCheckCode （用来生成验证码的）类
然后在根目录建立了个login.jsp页面在下面的配置中login.jsp能过正常显示验证码图片
现在我把login.jsp移动到根目录的admin目录下了，验证码无法显示了应该怎么修改下面的配置啊？<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

  <display-name>FCKeditor.Java Sample Web Application</display-name>
<description>FCKeditor.Java Sample Web Application</description> <servlet>
<description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>PictureCheckCode</servlet-name>
    <servlet-class>com.PictureCheckCode</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>PictureCheckCode</url-pattern>

</servlet-mapping>




</web-app>

解决方案 »

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没把关键部分发出来啊LZ
login.jsp能过正常显示验证码图片
login.jsp引用的文件
login.jsp引用验证图片的连接没发出来啊
显示验证码的文件如下<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>英文、数字和中文混合的彩色验证码</title>
<link href="Css/style.css" rel="stylesheet">
<script language="javascript">
function checkform(myform){
for(i=0;i<myform.length;i++){
if(myform.elements[i].value==""){
alert(myform.elements[i].title+"不能为空！");
myform.elements[i].focus();
return false;
}
}
} function myReload(){
//document.getElementById("createCheckCode").src="PictureCheckCode";
document.getElementById("createCheckCode").src=document.getElementById("createCheckCode").src+"?nocache="+new Date().getTime();
}
</script>
</head><body>
<table width="613" height="434" border="0" align="center" cellpadding="0" cellspacing="0" background="images/loginBg.jpg">
  <tr>
    <td width="83" height="124" valign="top"> </td>
    <td width="418" valign="top"> </td>
    <td width="112" valign="top"> </td>
  </tr>
  <form name="form1" method="post" action="deal.jsp" onSubmit="return checkform(form1)">
  <tr>
    <td height="161" valign="top"> </td>
    <td align="center" valign="top"><table width="90%" height="141" border="0" cellpadding="0" cellspacing="0">
  <tr>
    <td width="23%" align="center">用户名：</td>
    <td colspan="2">
      <input name="username" type="text" id="username" size="30" title="用户名"></td>
  </tr>
  <tr>
    <td align="center">密  码：</td>
    <td colspan="2"><input name="pwd" type="password" id="pwd" size="30" title="密码"></td>
  </tr>
  <tr>
    <td align="center">验证码：</td>
    <td width="18%"><input name="checkCode" type="text" id="checkCode" title="验证码区分大小写" size="8" maxlength="4"></td>
    <td width="59%" style="padding-top:4px"><img src="PictureCheckCode" id="createCheckCode"><a href="#" onClick="myReload()"> 看不清?换一个</a></td>
  </tr>
  <tr>
    <td> </td>
    <td colspan="2"><input name="Submit" type="submit" class="btn_bg" value="登录">
       
      <input name="Submit2" type="reset" class="btn_bg" value="重置"></td>
  </tr>
</table>

</td>
    <td valign="top"> </td>
  </tr>
</form>
  <tr>
    <td valign="top"> </td>
    <td valign="top"> </td>
    <td valign="top"> </td>
  </tr>
</table>
</body>
</html>PictureCheckCode 的代码如下：package com;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;public class PictureCheckCode extends HttpServlet {
public PictureCheckCode() {
super();
} public void destroy() {
super.destroy();
} public void init() throws ServletException {
super.init();
} // 获取随机颜色
public Color getRandColor(int s, int e) {
Random random = new Random();
if (s > 255) s = 255;
if (e > 255) e = 255;
int r = s + random.nextInt(e - s); //随机生成RGB颜色中的r值
int g = s + random.nextInt(e - s); //随机生成RGB颜色中的g值
int b = s + random.nextInt(e - s); //随机生成RGB颜色中的b值
return new Color(r, g, b);
} public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "No-cache");
response.setDateHeader("Expires", 0);
// 指定生成的响应是图片
response.setContentType("image/jpeg");
int width = 86;
int height = 22;
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
Graphics2D g2d = (Graphics2D) g;
Random random = new Random();
Font mFont = new Font("黑体", Font.BOLD, 17);
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
g.setFont(mFont);
g.setColor(getRandColor(180, 200));
// 画随机的线条
for (int i = 0; i < 100; i++) {
int x = random.nextInt(width - 1);
int y = random.nextInt(height - 1);
int x1 = random.nextInt(6) + 1;
int y1 = random.nextInt(12) + 1;
BasicStroke bs = new BasicStroke(2f, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_BEVEL);
Line2D line = new Line2D.Double(x, y, x + x1, y + y1);
g2d.setStroke(bs);
g2d.draw(line);
}
String sRand = "";
// 输出随机的验证文字
String ctmp = "";
int itmp = 0;
for (int i = 0; i < 4; i++) {
//random = new Random(new java.util.Date().getTime() + i);
switch (random.nextInt(4)) {
case 1:
itmp = random.nextInt(26) + 65; // 生成A~Z的字母
ctmp = String.valueOf((char) itmp);
break;
case 2: // 生成汉字
String[] rBase = { "0", "1", "2", "3", "4", "5", "6", "7", "8",
"9", "a", "b", "c", "d", "e", "f" };
// 生成第1位的区码
int r1 = random.nextInt(3) + 11; //生成11到14之间的随机数
String str_r1 = rBase[r1];
// 生成第2位的区码
int r2;
if (r1 == 13) {
r2 = random.nextInt(7); //生成0到7之间的随机数
} else {
r2 = random.nextInt(16); //生成0到16之间的随机数
}
String str_r2 = rBase[r2];
// 生成第1位的位码
int r3 = random.nextInt(6) + 10; //生成10到16之间的随机数
String str_r3 = rBase[r3];
// 生成第2位的位码
int r4;
if (r3 == 10) {
r4 = random.nextInt(15) + 1; //生成1到16之间的随机数
} else if (r3 == 15) {
r4 = random.nextInt(15); //生成0到15之间的随机数
} else {
r4 = random.nextInt(16); //生成0到16之间的随机数
}
String str_r4 = rBase[r4];
System.out.println(str_r1 + str_r2 + str_r3 + str_r4);
// 将生成机内码转换为汉字
byte[] bytes = new byte[2];
//将生成的区码保存到字节数组的第1个元素中
String str_r12 = str_r1 + str_r2;
int tempLow = Integer.parseInt(str_r12, 16);
bytes[0] = (byte) tempLow;
//将生成的位码保存到字节数组的第2个元素中
String str_r34 = str_r3 + str_r4;
int tempHigh = Integer.parseInt(str_r34, 16);
bytes[1] = (byte) tempHigh;

ctmp = new String(bytes); //根据字节数组生成汉字
// System.out.println("生成汉字:" + ctmp);
break;
default:
itmp = random.nextInt(10) + 48; // 生成0~9的数字
ctmp = String.valueOf((char) itmp);
break;
}
sRand += ctmp;
Color color = new Color(20 + random.nextInt(110), 20 + random
.nextInt(110), 20 + random.nextInt(110));
g.setColor(color);
/** **随机缩放文字并将文字旋转指定角度* */
// 将文字旋转指定角度
Graphics2D g2d_word = (Graphics2D) g;
AffineTransform trans = new AffineTransform();
trans.rotate(random.nextInt(45) * 3.14 / 180, 15 * i + 8, 7);
// 缩放文字
float scaleSize = random.nextFloat() +0.8f;
if (scaleSize > 1f) scaleSize = 1f;
trans.scale(scaleSize, scaleSize);
g2d_word.setTransform(trans);
/** ********************* */
g.drawString(ctmp, 15 * i + 18, 14); }
// 将生成的验证码保存到Session中
HttpSession session = request.getSession(true);
session.setAttribute("randCheckCode", sRand);
g.dispose();
ImageIO.write(image, "JPEG", response.getOutputStream());
}}
<servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>PictureCheckCode</url-pattern>
</servlet-mapping>//貌似有问题应该是这样的
<servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>/PictureCheckCode</url-pattern>
</servlet-mapping>好像差个/
试下看看
src="<%=request.getContextPath() %>/PictureCheckCode"
我是只的这里
").src="<%=request.getContextPath() %>/PictureCheckCode"+"?nocache="+new Date().getTime();
<servlet>
        <description></description>
    <display-name></display-name>
    <servlet-name>PictureCheckCode</servlet-name>
    <servlet-class>com.PictureCheckCode</servlet-class>
    </servlet>    <servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>/valiCOde.jsp</url-pattern>//这里标签内写上显示验证码的jsp,这样就会自动显示验证码了
        //注意路径哦，这里是valiCOde.jsp是在webroot下的，如果有个valiCOde.jsp放在webroot下的admin文件
         //夹内，则为  /admin/valiCOde.jsp  。（ps : valiCOde.jsp 只要有page指令就可以了）
    </servlet-mapping>
楼主可以这样试试:
首先:
<servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>PictureCheckCode</url-pattern>
</servlet-mapping>
中的url-pattern改成:
/PictureCheckCode
然后:
将<img src="PictureCheckCode" id="createCheckCode"><a href="#" onClick="myReload()">
中的src改成:
src="../PictureCheckCode"
这样就应该没问题了~~
<servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>PictureCheckCode</url-pattern>
</servlet-mapping>
应该改为：
<servlet-mapping>
    <servlet-name>PictureCheckCode</servlet-name>
    <url-pattern>/PictureCheckCode</url-pattern>
</servlet-mapping>