package com.blogspot.na5cent; import java.io.*; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet(name = "DownloadFile", urlPatterns = {"/DownloadFile"}) public class DownloadFile extends HttpServlet { private static final int BYTES_DOWNLOAD = 1024; @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //set header response.setContentType("image/jpg"); response.setHeader("Content-Disposition", "attachment;filename=Download_Koala.jpg"); File download = new File("c:\\temp\\", "Koala.jpg"); InputStream inputStream = null; OutputStream outputStream = null; int read = 0; byte[] bytes = new byte[BYTES_DOWNLOAD]; try { inputStream = new FileInputStream(download); outputStream = response.getOutputStream(); while ((read = inputStream.read(bytes)) != -1) { outputStream.write(bytes, 0, read); } } catch (FileNotFoundException e) { System.out.println(e); } catch (IOException e) { System.out.println(e); } finally { inputStream.close(); outputStream.flush(); outputStream.close(); } /* if you use google common io import com.google.common.io.ByteStreams; import com.google.common.io.Closeables; try { inputStream = new FileInputStream(download); ByteStreams.copy(inputStream, response.getOutputStream()); } finally { inputStream.close(); Closeables.close(inputStream, false); } */ } }
วันอาทิตย์ที่ 10 มิถุนายน พ.ศ. 2555
Servlet download file (java)
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