jsp页上如何取出servlet里生成的验证码图片？

jsp页上怎么取出servlet里生成的验证码图片？？
util中生成验证码代码
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("image/jpeg");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "No-cache");
response.setDateHeader("Expires", 0);
HttpSession session = request.getSession();
int width = 60;
int height = 20;
BufferedImage image = new BufferedImage(width, height, 1);
Graphics g = image.getGraphics();
Random random = new Random();
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
g.setFont(new Font("Arial", 0, 19));
g.setColor(getRandColor(160, 200));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width + 100);
int y = random.nextInt(height + 100);
int xl = random.nextInt(10);
int yl = random.nextInt(12);
g.drawOval(x, y, x + xl, y + yl);
}

String sRand = "";
for (int i = 0; i < 4; i++) {
String rand = getRandChar(random.nextInt(36));
sRand = 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();
javax.servlet.ServletOutputStream imageOut = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(imageOut);
encoder.encode(image);
}

public void destroy() {
}

private 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);
}

private String getRandChar(int randNumber) {
return CHARARRAY[randNumber];
}

private static final String CHARARRAY[] = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "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" };
web.xml配置：
<servlet>
<servlet-name>safecode</servlet-name>
<servlet-class>com.bm.util.SafeCode</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>safecode</servlet-name>
<url-pattern>/safeCode</url-pattern>
</servlet-mapping>
jsp代码：
<td>
<s:text name="code" />
</td>
<td>
<s:textfield name="safecode" />
</td>
<td>
<img src="safecode" id="safecode" />
</td>
但结果显示验证码无法显示，请大家帮我看看

为啥显示不出来啊？？请问 img标签的 src属性要怎么填？？ 还是别的地方出错了??

非常感谢！！！！！


------解决方案--------------------------------------------------------
<url-pattern>/safeCode</url-pattern>

注意大小写吧。。。

<img src="safeCode" id="safecode" />

另外也注意下路径，是不是需要： /xxoo/safeCode
------解决方案--------------------------------------------------------

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<url-pattern>/safeCode</url-pattern>