package org.kodejava.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet(name = "ResponseStatusServlet", urlPatterns = "/response-status")
public class ResponseStatus extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // All response status is defined in the HttpServletResponse class. We
        // can then use these constants value to return process status to the
        // browser.
        response.setContentType("text/html");

        // Let say this servlet only handle request for page name inputForm. So
        // when user request for other page name error page not found 404 will
        // be returned, otherwise it will be 200 which mean OK.
        String page = request.getParameter("page");
        if (page != null && page.equals("inputForm")) {
            response.setStatus(HttpServletResponse.SC_OK);
        } else {
            final String message = "The requested page [" + page + "] not found.";
            response.sendError(HttpServletResponse.SC_NOT_FOUND, message);
        }
    }
}

Here is a list of all available status code that are defined in the HttpServletResponse class.

Maven dependencies

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>4.0.1</version>
</dependency>

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Wayan

Founder at Kode Java

A programmer, runner and recreational diver, lives on the island of Bali, Indonesia. Programming in Java, Spring Framework, Hibernate / JPA, MySQL. To support me working on this project, buy me a cup of coffee, every little bit helps. Thank you.

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