outputstream

I am writing an OutputStream, just noticed this in the OutputStream interface, public abstract void write(int b) throws IOException; This call write one byte to the stream but why it takes integer as an argument? Actually I've been working with bytes a bit lately and they can be annoying. They up-convert to ints at the slightest provocation and there is no designation to turn a number into a byte--for instance, 8l will give you a long value 8, but for byte you have to say (byte)8 On top of that, they will (pretty much) always be stored internally as ints unless you are using an array (and

I want to invoke an external program in java code, then the Google tell me that the Runtime or ProcessBuilder can help me to do this work. I have tried it, and there come out a problem the java program can't exit, that means both the sub process and the father process wait for forever. they are hanging or deadlock. Someone tell me the reason is that the sub process's cache is too small. when it try to give back data to the father process, but the father process don't read it in time, then both of them hang. So they advice me fork an thread to be in charge of read sub process's cache data. I do

I have an InputStream that I want written to a HttpServletResponse. There's this approach, which takes too long due to the use of byte[] InputStream is = getInputStream(); int contentLength = getContentLength(); byte[] data = new byte[contentLength]; is.read(data); //response here is the HttpServletResponse object response.setContentLength(contentLength); response.write(data); I was wondering what could possibly be the best way to do it, in terms of speed and efficiency. Just write in blocks instead of copying it entirely into Java's memory first. The below basic example writes it in blocks of

I need to read a pdf file with filepath "C:\file.pdf" and write it to outputStream. What is the easiest way to do that? @Controller public class ExportTlocrt { @Autowired private PhoneBookService phoneBookSer; private void setResponseHeaderTlocrtPDF(HttpServletResponse response) { response.setContentType("application/pdf"); response.setHeader("content-disposition", "attachment; filename=Tlocrt.pdf" ); } @RequestMapping(value = "/exportTlocrt.html", method = RequestMethod.POST) public void exportTlocrt(Model model, HttpServletResponse response, HttpServletRequest request){

I've been trying to get the "new" ZipArchive included in .NET 4.5 ( System.IO.Compression.ZipArchive ) to work in a ASP.NET site. But it seems like it doesn't like writing to the stream of HttpContext.Response.OutputStream . My following code example will throw System.NotSupportedException: Specified method is not supported as soon as a write is attempted on the stream. The CanWrite property on the stream returns true. If I exchange the OutputStream with a filestream, pointing to a local directory, it works. What gives? ZipArchive archive = new ZipArchive(HttpContext.Response.OutputStream,