Your own simple JSP tag : Tag « JSP « Java

Your own simple JSP tag


// add to web.xml
// create new java2s.tld file in WEB-INF directory
<!DOCTYPE taglib
  PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"

    <!-- a tab library descriptor -->
<taglib xmlns="">
  <short-name>Java2s Simple Tags</short-name>


// create under WEB-INF\classes\com\java2s\
// include jsp-api.jar into your CLASSPATH
// and compile it
package com.java2s;

import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.*;

public class HelloWorldTag extends TagSupport
    public int doStartTag() throws JspException
            JspWriter out = pageContext.getOut();
            HttpServletResponse response = (HttpServletResponse)pageContext.getResponse();
            out.write("Hello world from!");
        catch(Exception e)
            throw new JspException(e.getMessage());
        return EVAL_PAGE;

// create JSP file: HelloWorldTag.jsp
<%@ taglib uri='WEB-INF/java2s.tld' prefix='hw' %>
<!-- the HellowWorld must be consistent with the tag name in *.tld-->
    <hw:HelloWorldTag />

// start tomcat and load the JSP file in the browser


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