Jsp ÑéÖ¤Âë(¼ìÑéÂë)µÄʵÏÖ

ÀûÓÃApacheµÄÒ»¸ö ¿ªÔ´ÏîÄ¿Image Tag Library(http://jakarta.apache.org/taglibs/sandbox/doc/image-doc/intro.html)
ÀûÓÃApacheµÄÒ»¸ö ¿ªÔ´ÏîÄ¿Image Tag Library(http://jakarta.apache.org/taglibs/sandbox/doc/image-doc/intro.html)
ÏÂÔرØÒªÎļþ
1)ÏÂÔØJakarta-Taglibs:
http://people.apache.org/builds/jakarta-taglibs-sandbox/nightly/
   ½âѹºóÈ¡³ötaglibs-image.jar·ÅÓÚ/WEB-INF/libÏÂ
½«taglibs-image.tld¿½µ½/WEB-INF/ÏÂ
2)ÏÂÔØPoor Man's Imaging Wrapper£ºImage Tag Óõ½ÁËÕâ¸ö°ü
http://www.mullassery.com/downloads/ ÌîдһЩ±ØÒªÐÅÏ¢ºó¾Í¿ÉÒÔÃâ·ÑÏÂÔØÁË
½âѹºó½«pmiw.jar¿½µ½/WEB-INF/libÏÂ
ÔÚweb.xmlÖÐÅäÖÃImageServlet
<context-param>
    <param-name>ImageServletMapping</param-name>
    <param-value>/gen-image</param-value>
</context-param>
<servlet>
    <servlet-name>ImageServlet</servlet-name>
    <servlet-class>org.apache.taglibs.image.ImageServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>ImageServlet</servlet-name>
    <url-pattern>/gen-image/*</url-pattern>
</servlet-mapping>
ÔÚjspÒ³ÃæÖмÓÈëʵÏÖ´úÂë(²¿·ÖÄÚÈݲο¼ÁËhttp://technology.a.lunqun.com/read.php?tid=149894&page=e&fpage=1)
1)ÔÚÒ³Ê×¼ÓÈë<%@ taglib uri="/WEB-INF/taglibs-image.tld" prefix="img" %>
2)ÔÚÒ³Ã涥¶Ë¼ÓÈë
<%
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
%>
3)ÔÚÏë¼ÓÉÏÑéÖ¤ÂëµÄµØ·½¼ÓÉÏÈçÏ´úÂ룺
<%
int num = (int) java.lang.Math.round(java.lang.Math.random() * 8999);
String sRand = "" + (1000 +num);
session.setAttribute("userInfo.authcode",sRand);
%>
<img:image src="/graphics/auth.jpg" refresh="true">
<img:text text="<%=sRand.substring(0,1)%>" x="7" y="-1" font="Times New Roman" bold="false" size="22" color="0x993399" italic="true" />
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