To create your own JSP tag described in your own custom Tag Library Descriptor (TLD), do the following steps,
1) Create a Java class that will do the work of the tag when the tag is encountered in the JSP - MyTagHandler.java - in the src folder of the web application
2) Create a TLD file - mytld.tld - in the WebContent/WEB-INF folder of the web application with the following configuration for the tag
3) Create a JSP - myTagTest.jsp - and add it to the WebContent folder of the web application with the following code
4) Test the code with the following URL in the browser,
1) Create a Java class that will do the work of the tag when the tag is encountered in the JSP - MyTagHandler.java - in the src folder of the web application
package info.icontraining.jsp;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;
public class MyTagHandler extends SimpleTagSupport {
private String value;
public void setValue(String value) {
this.value = value;
}
public String getValue() {
return this.value;
}
public void doTag() throws JspException, IOException {
getJspContext().getOut().write("Output from tag: ");
getJspContext().getOut().write("Value is " + getValue());
}
}
2) Create a TLD file - mytld.tld - in the WebContent/WEB-INF folder of the web application with the following configuration for the tag
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">
<description>Test description</description>
<display-name>My TLD</display-name>
<tlib-version>1.1</tlib-version>
<short-name>mine</short-name>
<uri>myUriForMyTLD</uri>
<tag>
<description>My Tag Description</description>
<name>testTag</name>
<tag-class>info.icontraining.jsp.MyTagHandler</tag-class>
<body-content>empty</body-content>
<attribute>
<description>My attribute description</description>
<name>value</name>
<required>true</required>
<rtexprvalue>false</rtexprvalue>
</attribute>
</tag>
</taglib>
3) Create a JSP - myTagTest.jsp - and add it to the WebContent folder of the web application with the following code
<%@ taglib prefix="mine" uri="myUriForMyTLD" %>
<html>
<body>
<mine:testTag value="something" />
</body>
</html>
4) Test the code with the following URL in the browser,
http://localhost:8080/WebAppName/myTagTest.jsp
