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´¦ÀíÀà¼Ì³ÐTagSupportÀà²¢ÖØÔØdoStartTag()·½·¨,
       Ôڸ÷½·¨ÖÐʹÓÃout.print();Êä³öÐèÒªµÄÊý¾Ýµ½Ê¹Óñ¾±êÇ©µÄjspÒ³Ãæ
package cn.xxx;
public class DateTag extends TagSupport {
private static final long serialVersionUID = 1L;
public int doStartTag() throws javax.servlet.jsp.JspException {
JspWriter out;
try {
out = pageContext.getOut();
out.print("helloÄãºÃ" + new Date());
} catch (IOException ioe) {
throw new JspException("I/O Error : " + ioe.getMessage());
}
return Tag.SKIP_BODY;//return 0;
}

2 ´´½¨Ê¹ÓñêÇ©ÀàµÄ´´TLDÎļþ
(¿ÉÒÔ´ÓstrutsÖеıêÇ©¿âÖеÄtld¸´ÖÆ)
<?xml version="1.0" encoding="UTF-8" ?>
<taglib
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
web-jsptaglibrary_2_0.xsd" verson="2.0">

<tlib-version>1.0</tlib-version>
<jspversion>1.1</jspversion>

<info>A simple tag library</info>
<tag>
<name>displayDate</name>
<tagclass>cn.eecn.DateTag</tagclass>
<bodycontent>empty</bodycontent>
<info>Display Date</info>
</tag>
</taglib> 
3 µ¼Èë±êÇ©¿â
    * ·½·¨1
          ÔÚweb.xmlÎļþÖÐÏȾ²Ì¬µ¼ÈëtldÎļþ,ÔÙjspÖÐÓñðÃûµ¼Èë±êÇ©
web.xml:
<taglib>
<taglib-uri>myTags</taglib-uri>
<taglib-location>/WEB-INF/lib/DateTagLib.tld</taglib-location>
</taglib> 
jsp:
<%@ taglib uri="myTags" prefix="abc" %> 
* ·½·¨2:
        ÔÚjspÒ³ÃæÖÐÖ±½ÓʹÓö¯Ì¬µ¼ÈëtldÎļþ
<%@ taglib uri="/WEB-INF/lib/DateTagLib.tld" prefix="abc" %> 
4 ÔÚÒ³ÃæÖÐʹÓñêÇ©
    jsp
<abc:displayDate /> 
ÒýÓòο¼:http://blog.myspace.cn/e/406226695.htm


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