How to pass a command string and file content in a socket?

Question

socket = new Socket(host.getHostIp(), host.getFilePort());
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("c:/test.xls")));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
bw.write("this is my control command.\n");// *\n use to mark a line*
String cur = null;
while((cur =br.readLine())!=null){
     bw.write(cur);
     bw.newLine();
br.close();
bw.flush();
bw.close();then,read from the socket:
BufferedReader myIn = new BufferedReader(new InputStreamReader(_myProcessSocket.getInputStream()));
String command = myIn.readLine();
// read file
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("d:/test.xls")));
String cur = null;
while ((cur = myIn .readLine()) != null) {
     bw.write(cur);
     bw.newLine();
bw.flush();
bw.close();
myIn .close();I find d:/test.xls cannot read,the file is bad.The code below is the same:
     BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("c:/Ñз¢ÈÎÎñ¸ú×ÙÇåµ¥_V5.1.xls")));
               BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("c:/Ñз¢ÈÎÎñ¸ú×ÙÇåµ¥_V5.2.xls")));
               String cur = null;
               while ((cur = br.readLine()) != null) {
                    bw.write(cur);
                    bw.newLine();
               bw.flush();
               bw.close();
               br.close();

Answer 1

You should only get the OutputStream and InputStream once and wrap this in the data streams
To send data -
DataOutputStream dos = new DataOutputStram(socket.getOutputStream());
dos.writeUTF("´ïµ½ddddd");
dos.writeInt(lengthOfFile);
// Now loop reading the  file bytes a buffer and a time and writing them
// using
dos.write(buffer, 0, bytesRead);To receive data-
DataInputStream dis = new DataInputStream(socket.getInputStream());
String valueSent = dis.readUTF(); // Will return "´ïµ½ddddd"
int lengthofFile = dis.readInt();
// Now loop reading the file bytes to a buffer until you have read all the bytes of the file.