Types of Comments in JSP

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There are two types of comments are allowed in the JSP. These are hidden and output comments. A hidden comments does not appear in the generated output in the html, while output comments appear in the generated output.

Example of hidden comment:

<%– This is hidden comment –%>

Example of output comment:<!– This is output comment –>

In JavaServer Pages (JSP), comments are used to add explanatory notes and documentation within the JSP code. There are two types of comments in JSP:

  1. HTML Comments:
    • Syntax: <!-- This is an HTML comment -->
    • These comments are similar to HTML comments and are used for adding comments within the HTML content of the JSP.
  2. JSP Comments:
    • Syntax: <%-- This is a JSP comment --%>
    • These comments are specific to JSP and can be used to add comments within the JSP code. JSP comments are not visible in the generated HTML output; they are only for the developer’s reference.

Here’s an example of using both types of comments in a JSP file:

jsp
<!DOCTYPE html>
<html>
<head>
<title>JSP Comments Example</title>
</head>
<body>

<!-- This is an HTML comment -->
<h1>Welcome to my JSP Page</h1>

<%-- This is a JSP comment --%>
<%
// This is a Java comment
String message = "Hello, World!";
out.println(message);
%>

</body>
</html>

In this example, HTML comments are used to comment on HTML elements, and JSP comments are used to add comments within the JSP code. Java comments (//) are also used within the embedded Java code.