Servlet Jar Download Project

Click here to download eclipse supported ZIP file




 

    
package com.cv.servlet.jar.download;



import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;



/**

 * Servlet implementation class HelloServlet

 * 

 *

 * @author Chandra Vardhan

 *

 */

 



public class JarDownloadServlet extends HttpServlet {

  



  private static final Logger LOGGER = Logger.getLogger(JarDownloadServlet.class);



  private static final long serialVersionUID = 1L;



  /**

   * @see HttpServlet#HttpServlet()

   */

  public JarDownloadServlet() {

    super();

  }



  /**

   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse

   *      response)

   */

  public void doGet(HttpServletRequest request, HttpServletResponse response)

      throws ServletException, IOException {

    

    LOGGER.info("Entered into doGet(--) of JarDownloadServlet class... ");



    // setting the MIME type.

    response.setContentType("application/jar");



    

    LOGGER.info("Reading the hello jar file from application...");



    InputStream inputStream = getServletContext().getResourceAsStream(

        "/hello.jar");



    int read = 0;



    byte[] bytes = new byte[1024];



    OutputStream outputStream = response.getOutputStream();



    while ((read = inputStream.read(bytes)) != -1) {

      outputStream.write(bytes, 0, read);

    }

    outputStream.flush();

    LOGGER.info("Jar file has been downloaded successfully...");

    outputStream.close();

  }



  /**

   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse

   *      response)

   */

  public void doPost(HttpServletRequest request, HttpServletResponse response)

      throws ServletException, IOException {

    LOGGER.info("Entered into doPost(--) of JarDownloadServlet class... ");

    doGet(request, response);

  }



}



<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Jar Download Servlet</title>

</head>

<body>

<br/>

<br/>

	<form action="JarDownloadServlet" method="post">

		<center><input type="submit" value="Click here to continue..."></center>

	</form>


</body>

</html>

















#By default enabling Console appender

# Root logger option

log4j.rootLogger=INFO, stdout



# Redirect log messages to console

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.Target=System.out

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%-5p [%c]:%L -->> %m%n



# Redirect log messages to a log file

#log4j.appender.file=org.apache.log4j.RollingFileAppender

#log4j.appender.file.File=C:\\servlet-application.log

#log4j.appender.file.MaxFileSize=5MB

#log4j.appender.file.MaxBackupIndex=10

#log4j.appender.file.layout=org.apache.log4j.PatternLayout

#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
















<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <artifactId>ServletJarDownload</artifactId>
  <version>1.0</version>
  <packaging>war</packaging>
   <properties>
		<log4j.version>1.2.16</log4j.version>
		<java.version>1.8</java.version>
	</properties>

	<build>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.3</version>
				<configuration>
					<source>${java.version}</source>
					<target>${java.version}</target>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<version>2.6</version>
				<configuration>
					<warSourceDirectory>WebContent</warSourceDirectory>
					<failOnMissingWebXml>false</failOnMissingWebXml>
				</configuration>
			</plugin>
		</plugins>
	</build>
	<dependencies>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>3.0-alpha-1</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>${log4j.version}</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.0</version>
		</dependency>
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>taglibs</groupId>
			<artifactId>standard</artifactId>
			<version>1.1.2</version>
		</dependency>
	</dependencies>
	<groupId>com.cv.servlet.session.listener</groupId>
</project>
















 
<?xml version="1.0" encoding="UTF-8"?> 
<web-app 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"   version="3.1">

	<servlet>
		<servlet-name>JarDownloadServlet</servlet-name>
		<servlet-class>com.cv.servlet.jar.download.JarDownloadServlet</servlet-class>
	</servlet>

	<servlet-mapping>
		<servlet-name>JarDownloadServlet</servlet-name>
		<url-pattern>/JarDownloadServlet</url-pattern>
	</servlet-mapping>


	<welcome-file-list>
		<welcome-file>download.html</welcome-file>
	</welcome-file-list>

</web-app>













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