JSP Example to create custom tag that will append a String to its own body and will display the result

Details.java

package beginnersbook.com;

import javax.servlet.jsp.tagext.*;

import javax.servlet.jsp.*;

import java.io.*;

public class Details extends SimpleTagSupport {

   //StringWriter object

   StringWriter sw = new StringWriter();

   public void doTag() throws JspException, IOException

       getJspBody().invoke(sw);

       JspWriter out = getJspContext().getOut();

       out.println(sw.toString()+"Appended Custom Tag Message");

TLD file: message.tld
Remember to have this file in WEB-INF folder.

<taglib>

<tlib-version>1.0</tlib-version>

<jsp-version>2.0</jsp-version>

<short-name>My Custom Tag: MyMsg</short-name>

<tag>

<name>MyMsg</name>

<tag-class>beginnersbook.com.Details</tag-class>

<body-content>scriptless</body-content>

</tag>

</taglib>

JSP Page: index.jsp

<%@ taglib prefix="myprefix" uri="WEB-INF/message.tld"%>

<html>

<head>

  <title>Accessing Custom Tag Body Example</title>

</head>

<body>

  <myprefix:MyMsg>

    Test String

  </myprefix:MyMsg>

</body>

</html>

Just Think and Twist