How to Download PDF File in Servlet

on January 18, 2017

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Download PDF File in Servlet

In this example, we will show you how to download PDF file in servlet. The example application was tested with Apache Tomcat Web Server and output has been shared in the same post.

Project Structure

Download PDF File in Servlet

Servlet Class (Downloader.java)

package com.dineshkrish.servlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 
* @author Dinesh Krishnan
* 
*/
public class Downloader extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
final String filepath = "C:\\File.pdf";
ServletOutputStream outputStream = response.getOutputStream();
// setting http header information
response.setContentType("application/pdf");
response.setHeader("Content-Disposition", "inline; filename=java_book.pdf");// download file name
// defining File object
File file = new File(filepath);
// defining InputStream object
FileInputStream inputStream = new FileInputStream(file);
int data = inputStream.read();
while(data != -1) {
outputStream.write(data);
data = inputStream.read();
}
outputStream.close();
inputStream.close();
}
}

Configuration File (web.xml)

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>Downloader</servlet-name>
<servlet-class>com.dineshkrish.servlet.Downloader</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Downloader</servlet-name>
<url-pattern>/download</url-pattern>
</servlet-mapping>
</web-app>