UploadServlet.java

/*
 * Copyright (C) 2014 Francesco Azzola
 *  Surviving with Android (http://www.survivingwithandroid.com)
 *
 *  Licensed 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
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.survivingwithandroid.jee.http;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

/**
 * Servlet implementation class UploadServlet
 */
@WebServlet("/UploadServlet")
@MultipartConfig
public class UploadServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
   

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		upload(request,response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		upload(request,response);
	}
	
	private void upload(HttpServletRequest request, HttpServletResponse response) throws ServletException {
		try {
		  String param1 = request.getParameter("param1");
		  System.out.println("Param1 ["+param1+"]");

		  String param2 = request.getParameter("param2");
		  System.out.println("Param2 ["+param2+"]");

		  Part p = request.getPart("file");
		  String fileName = extractFileName(p);
		  File f = new File("C:\\" + fileName);
		  
		  FileOutputStream fos = new FileOutputStream(f);
		  InputStream is = p.getInputStream();
		  byte[] buffer = new byte[1024];
		  
		  while ( is.read(buffer) != -1)
			  fos.write(buffer);
		  
		  System.out.println("File name ["+fileName+"] - Size ["+f.length()+"]");
		  is.close();
		  fos.close();
		}
		catch(Throwable t) {
			t.printStackTrace();
		}
	}
	
	private String extractFileName(Part part) {
	    String contentDisp = part.getHeader("content-disposition");
	    String[] items = contentDisp.split(";");
	    for (String s : items) {
	        if (s.trim().startsWith("filename")) {
	            return s.substring(s.indexOf("=") + 2, s.length()-1);
	        }
	    }
	    return "";
	}

}