WebSphere Application Server - IBM Redbooks

}
*/
public HelloBean() {
super();
}
/**
* Returns a string saying hello to the name argument.
*
* @return A hello message
* @param name java.lang.String The name to say hello to
*/
public String hello(String name) {
return "Hello " + name;
}
Now we have the syntax for our tag defined, and the bean that provides the
implementation. The rest of the steps are best described as cookbook code. That
is, the code is largely the same whatever tag you are implementing. The classes
and methods you need to define are always the same. The first few times you go
through these steps will perhaps seem tedious, but creating them soon becomes
relatively trivial.
Tag handler class
The tag handler class extends the javax.servlet.jsp.tagext.TagSupport class, and
provides an endTag() method that will be executed when our tag has been
parsed by the Web container. We also need to create an instance variable called
name that will hold the value of our tag’s attribute. Our tag handler class is shown
in Example 9-2. Important sections of code are in bold, and comments are
provided to explain what is happening.
Example 9-2 Simple custom tag example: HelloTag.java
//Simple custom tag example: HelloTag.java
package com.ibm.itso.j2eebook.tagexamples;
import java.io.IOException;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import com.ibm.itso.j2eebook.tagexamples.beans.*;
/**
* Handles the hello tag.
*
* @author: Adrian Spender
*/
public class HelloTag extends javax.servlet.jsp.tagext.TagSupport {
Chapter 9. Using tag libraries 281