https://tomcat.apache.org/: JSP package 
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* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
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package javax.servlet.jsp;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


The HttpJspPage interface describes the interaction that a JSP Page
Implementation Class must satisfy when using the HTTP protocol.


The behaviour is identical to that of the JspPage, except for the signature
of the _jspService method, which is now expressible in the Java type
system and included explicitly in the interface.

See Also:
  • JspPage
/**
 * The HttpJspPage interface describes the interaction that a JSP Page
 * Implementation Class must satisfy when using the HTTP protocol.
 *
 * <p>
 * The behaviour is identical to that of the JspPage, except for the signature
 * of the _jspService method, which is now expressible in the Java type
 * system and included explicitly in the interface.
 *
 * @see JspPage
 */

public interface HttpJspPage extends JspPage {

    
The _jspService()method corresponds to the body of the JSP page. This
method is defined automatically by the JSP container and should never
be defined by the JSP page author.


If a superclass is specified using the extends attribute, that
superclass may choose to perform some actions in its service() method
before or after calling the _jspService() method.  See using the extends
attribute in the JSP_Engine chapter of the JSP specification.

Params:
  • request – Provides client request information to the JSP.
  • response – Assists the JSP in sending a response to the client.
Throws:
  • ServletException – Thrown if an error occurred during the
    processing of the JSP and that the container should take
    appropriate action to clean up the request.
  • IOException – Thrown if an error occurred while writing the
    response for this page.
/** The _jspService()method corresponds to the body of the JSP page. This
     * method is defined automatically by the JSP container and should never
     * be defined by the JSP page author.
     * <p>
     * If a superclass is specified using the extends attribute, that
     * superclass may choose to perform some actions in its service() method
     * before or after calling the _jspService() method.  See using the extends
     * attribute in the JSP_Engine chapter of the JSP specification.
     *
     * @param request Provides client request information to the JSP.
     * @param response Assists the JSP in sending a response to the client.
     * @throws ServletException Thrown if an error occurred during the
     *     processing of the JSP and that the container should take
     *     appropriate action to clean up the request.
     * @throws IOException Thrown if an error occurred while writing the
     *     response for this page.
     */
    public void _jspService(HttpServletRequest request,
                            HttpServletResponse response)
       throws ServletException, IOException;
}