dataoutputstream

问题 I have built a basic HTTP server and I am attempting to send a reply to a GET request. I have installed Gson as the JSON parser, but I'm not sure how to encode the response in JSON and send back to the client. Here is my code, any help is much appreciated. (last method for actual response) public class HttpServer extends Thread{ //Private variables private Socket connectedClient = null; private BufferedReader clientRequest = null; private DataOutputStream responseToClient = null; /** * Public

问题 this is my Client code Random rand = new Random(); int n = rand.nextInt(50) + 1; DataInputStream dis = new DataInputStream(_socket.getInputStream()); DataOutputStream dos = new DataOutputStream(_socket.getOutputStream()); dos.writeInt(n); and this is the Server code try { DataInputStream dis = new DataInputStream(socket.getInputStream()); BufferedReader input = new BufferedReader(new InputStreamReader(dis)); int fromClient = input.read(); System.out.println(fromClient); } catch (IOException e

问题 In this Java project I'm working on for university, I have a situation where I am currently sending strings through the network successfully using streamOut = ObjectOutputStream streamIn = ObjectInputStream streamOut.writeUTF(msgs.peek()); where msgs is a linked blocking queue, receiving it with String in = streamIn.readUTF(); however, I would like to use an ObjectInputStream and an ObjectOutputStream. I have initialized them both in the constructor and I flush the ObjectOutputStream after

问题 How can I write/read a string from a binary file? I've tried using writeUTF / readUTF (DataOutputStream/DataInputStream) but it was too much of a hassle. Thanks. 回答1: Forget about FileWriter, DataOutputStream for a moment. For binary data one uses OutputStream and InputStream classes. They handle byte[] . For text data one uses Reader and Writer classes. They handle String which can store all kind of text, as it internally uses Unicode. The crossover from text to binary data can be done by

问题 I´m trying write strings in diffrent languages to a rtf file. I hav tried a few different things. I use japanese here as an example but it´s the same for other languages i have tried. public void writeToFile(){ String strJapanese = "日本語"; DataOutputStream outStream; File file = new File("C:\\file.rtf"); try{ outStream = new DataOutputStream(new FileOutputStream(file)); outStream.writeBytes(strJapanese); outStream.close(); }catch (Exception e){ System.out.println(e.toString()); } } I alse have

问题 I'm having quite a problem here, and I think it is because I don't understand very much how I should use the API provided by Java. I need to write an int and a byte[] into a byte[] I thought of using a DataOutputStream to solve the data writing with writeInt(int i) and write(byte[] b) , and to be able to put that into a byte array, I should use ByteArrayOutputStream method toByteArray(). I understand that this classes use the Wrapper pattern, so I had two options: DataOutputStream w = new

问题 I'm having quite a problem here, and I think it is because I don't understand very much how I should use the API provided by Java. I need to write an int and a byte[] into a byte[] I thought of using a DataOutputStream to solve the data writing with writeInt(int i) and write(byte[] b) , and to be able to put that into a byte array, I should use ByteArrayOutputStream method toByteArray(). I understand that this classes use the Wrapper pattern, so I had two options: DataOutputStream w = new

问题 For some reasons, I need to send multiple byte arrays separately via server socket, and client socket will receive these byte arrays. After sending byte arrays, I found byte arrays received in client socket are not equal to those in server socket. If I use ObjectOutputStream and ObjectInputStream, then everything works fine, but for my need, I can't use ObjectOutputStream & ObjectInputStream, because my server need to connect more than 2 sockets. Here is Server and Client code: Server(Sender)

问题 I'm developing an application that can send different files to web server.Also I want to send large files, in able to do this I need to chunk the files. But when I'm sending the files to server nothing is uploaded. I don't know if there's error on how I'm sending the files and it gives an error 500 (internal server error) on my response.I don't think the server is the problem because when I'm uploading a file using multiPartEntity it works but when Im using BufferedInputStream and

问题 I've been doing some socket programming to transmit information across the wire. I've run into a problem with DataOutputStream.writeUTF(). It seems to allow strings of up to 64k but I have a few situations where I can run over this. Are there any good alternatives that support larger strings or do I need to roll my own? 回答1: It actually uses a two bytes to write the length of the string before using an algorithm that compacts it into one, two or three bytes per character. (See the