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The Java Developers Almanac 1.4Order this book from Amazon. |
e1037. Returning an Image in a ServletThis example returns to the requestor, an image read from a file:// See also e1035 The Quintessential Servlet // This method is called by the servlet container to process a GET request. public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { // Get the absolute path of the image ServletContext sc = getServletContext(); String filename = sc.getRealPath("image.gif"); // Get the MIME type of the image String mimeType = sc.getMimeType(filename); if (mimeType == null) { sc.log("Could not get MIME type of "+filename); resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return; } // Set content type resp.setContentType(mimeType); // Set content size File file = new File(filename); resp.setContentLength((int)file.length()); // Open the file and output streams FileInputStream in = new FileInputStream(file); OutputStream out = resp.getOutputStream(); // Copy the contents of the file to the output stream byte[] buf = new byte[1024]; int count = 0; while ((count = in.read(buf)) >= 0) { out.write(buf, 0, count); } in.close(); out.close(); }
e1036. Getting and Setting Initialization Parameters for a Servlet e1038. Saving Data in a Servlet e1039. Logging a Message in a Servlet © 2002 Addison-Wesley. |