How to Pass Information From JSP to Included JSP

by

Using <%jsp:param> tag.

In JavaServer Pages (JSP), you can pass information from one JSP page to another, especially when using include directives. One way to achieve this is by using request attributes. Here’s an example of how you can pass information from one JSP to another using request attributes:

  1. Set Attribute in the Parent JSP: In your parent JSP (the one that includes the other JSP), set a request attribute before including the child JSP.
    jsp
    <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
    <head>
    <title>Parent JSP</title>
    </head>
    <body>    <%
    // Set a variable in the request attribute
    request.setAttribute(“message”, “Hello from Parent JSP”);
    %>

    <!– Include the child JSP –>
    <%@ include file=“child.jsp” %>

    </body>
    </html>

  2. Retrieve Attribute in the Included JSP (child.jsp): In your child JSP, retrieve the request attribute set in the parent JSP.
    jsp
    <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
    <head>
    <title>Child JSP</title>
    </head>
    <body>    <%
    // Retrieve the attribute from the request
    String message = (String) request.getAttribute(“message”);
    %>

    <p><%= message %></p>

    </body>
    </html>

In this example, the message attribute is set in the parent JSP and then retrieved in the included (child) JSP. Note that the request.getAttribute method is used to retrieve the attribute value in the child JSP.

Remember to handle potential null values or use default values based on your specific requirements and error-handling practices.