Programming for beginners: sendError (int sc)

public void sendError(int sc) throws IOException

Sends an error response to the client using the specified status code and clears the buffer. If the response was committed before this method call, then IllegalStateException thrown. The server will preserve cookies and may clear or update any headers needed to serve the error page as a valid response.

Main.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   
     <title>send Error</title>
    </head>
    <body>
        <form method="get" action="/servlet/SendError">
            <input type="submit" value ="Get Data">
        </form>
    </body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    <servlet>
        <servlet-name>SendError</servlet-name>
        <servlet-class>SendError</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>SendError</servlet-name>
        <url-pattern>/SendError</url-pattern>
    </servlet-mapping>
</web-app>

SendError.java

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

public class SendError extends HttpServlet {
    @Override
    public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{    
        res.sendError(404);
    }   
}

Output

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Programming for beginners

Friday, 22 August 2014

sendError (int sc)

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