package com.tag;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.TagSupport;public class EvalBodyTag extends TagSupport {    private boolean show;    public void setShow(boolean show){        this.show = show;        }    public int doStartTag() throws JspException {        // TODO Auto-generated method stub        if(show==true)            return super.EVAL_BODY_INCLUDE;        else            return super.SKIP_BODY;    }}

package com.tag;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.TagSupport;public class ShowPageTag extends TagSupport {    private boolean show;    public void setShow(boolean show){        this.show = show;    }    @Override        public int doEndTag() throws JspException {        System.out.println(show);        if(show==true)            return super.EVAL_PAGE;        else            return super.SKIP_PAGE;    }    @Override    public int doStartTag() throws JspException {        return super.EVAL_BODY_INCLUDE;    }}

package com.tag;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.IterationTag;import javax.servlet.jsp.tagext.Tag;import javax.servlet.jsp.tagext.TagSupport;public class RepeatTag extends TagSupport{        private int count;    public void setCount(int count){        this.count = count;    }    public int doAfterBody() throws JspException {        count--;        if(count>0)            return RepeatTag.EVAL_BODY_AGAIN;        else            return RepeatTag.SKIP_BODY;    }    public int doStartTag() throws JspException {        return Tag.EVAL_BODY_INCLUDE;    }    }

package com.tag;import java.io.IOException;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.BodyContent;import javax.servlet.jsp.tagext.BodyTagSupport;public class BodyContentTag extends BodyTagSupport {    @Override    public int doEndTag() throws JspException {        BodyContent body = this.getBodyContent();        String bc = body.getString();        bc = bc.toUpperCase();        try {            this.pageContext.getOut().write(bc);        } catch (IOException e) {            e.printStackTrace();            throw new RuntimeException(e);        }        return super.doStartTag();        }    @Override    public int doStartTag() throws JspException {        return super.EVAL_BODY_BUFFERED;    }}

<?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 http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"    version="2.0">    <description>A tag library exercising SimpleTag handlers.</description>    <tlib-version>1.0</tlib-version>    <short-name>SimpleTagLibrary</short-name>    <uri>http://self-tag-with-hello</uri>        <tag>        <name>helloWorld</name>        <tag-class>com.tag.HelloWorldTag</tag-class>        <body-content>empty</body-content>          <attribute>                 <name>name</name>                 <required>true</required>                 <rtexprvalue>true</rtexprvalue>           </attribute>     </tag>        <tag>        <name>evalbody</name>        <tag-class>com.tag.EvalBodyTag</tag-class>        <body-content>JSP</body-content>        <attribute>            <name>show</name>            <required>true</required>        </attribute>             </tag>        <tag>        <name>showpage</name>        <tag-class>com.tag.ShowPageTag</tag-class>        <body-content>JSP</body-content>        <attribute>            <name>show</name>            <required>true</required>        </attribute>             </tag>          <tag>        <name>repeatbody</name>        <tag-class>com.tag.RepeatTag</tag-class>        <body-content>JSP</body-content>        <attribute>            <name>count</name>            <required>true</required>        </attribute>             </tag>      <tag>        <name>changeContent</name>        <tag-class>com.tag.BodyContentTag</tag-class>        <body-content>JSP</body-content>        </tag>    </taglib>