What is JSP Document

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A JSP page written in XML syntax and subject to the constraints of XML documents.

In advanced Java, when referring to “JSP document,” it likely means a JavaServer Pages (JSP) document. JSP is a technology used in Java web development to create dynamic, server-side web pages. It allows embedding Java code within HTML or XML pages, enabling the development of dynamic content that can interact with JavaBeans, databases, and other Java components.

A JSP document typically has a “.jsp” extension and contains a mix of HTML or XML markup and Java code. The Java code in JSP is enclosed within special tags, such as <% %> for scriptlet tags, <%= %> for expression tags, and <%@ %> for directive tags.

Here’s a brief overview of these tags:

  1. Scriptlet Tags <% %>:
    • Used for embedding Java code directly within the HTML or XML content.
    • Example:
      jsp
      <%
      String message = "Hello, World!";
      out.println(message);
      %>
  2. Expression Tags <%= %>:
    • Used for evaluating and outputting the result directly into the HTML or XML content.
    • Example:
      jsp
      <p><%= 2 + 2 %></p>
  3. Directive Tags <%@ %>:
    • Used for providing global information about the entire JSP page.
    • Example:
      jsp
      <%@ page language="java" contentType="text/html; charset=UTF-8" %>

In summary, a JSP document is a text-based document that combines HTML or XML markup with embedded Java code to create dynamic web pages. It allows developers to build web applications with server-side processing capabilities.