http://java.sun.com/developer/technicalArticles/xml/WebAppDev3/index.html 1 tld文件的写法 <? xml version="1.0" encoding="ISO-8859-1" ?> <! DOCTYPE taglib PUBLIC "-//Sun Microsystems,Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd" > <!-- a tag library descriptor --> < taglib > < tlibversion > 1.0 </ tlibversion > < jspversion > 1.1 </ jspversion > < shortname > first </ shortname > < uri ></ uri > < info > A simple tab library for the examples </ info > < tag > < name > helloparam </ name > < tagclass > mytags.HelloTagParam </ tagclass > < bodycontent > empty </ bodycontent > < info > Tag with Parameter </ info > < attribute > < name > name </ name > < required > false </ required > < rtexprvalue > false </ rtexprvalue > </ attribute > < attribute > < name > pwd </ name > < required > false </ required > < rtexprvalue > false </ rtexprvalue > </ attribute > </ tag > </ taglib > 2 标签处理类的写法 package mytags; import java.io. * ; import javax.servlet.jsp. * ; import javax.servlet.jsp.tagext. * ; public class HelloTagParam extends TagSupport ... { private String name; private String pwd; public void setName(String name) ...{ this.name = name; } public void setPwd(String pwd) ...{ this.pwd = pwd; } public int doStartTag() throws JspException ...{ try ...{ pageContext.getOut().print("Welcome, " +name+" "+pwd); } catch (IOException ioe) ...{ throw new JspException("Error: IOException while writing to client"); } return SKIP_BODY; } public int doEndTag() throws JspException ...{ return SKIP_PAGE; }} 3 在JSP页面上的应用 <% ... @ taglib uri="/WEB-INF/taglib.tld" prefix="first" %> < first:helloparam name ="中国人" pwd ="1984" />