Java程序实现文件上传与移植

private void uploadFile() {
new Thread(new Runnable() {
public void run() {
try {
if(file!=null && file.exists()){
Socket socket = new Socket("192.168.1.100", 7878);
            OutputStream outStream = socket.getOutputStream();
            String head = "Content-Length="+ file.length() + ";filename="+ file.getName() + ";sourceid=\r\n";
            outStream.write(head.getBytes());
            
            PushbackInputStream inStream = new PushbackInputStream(socket.getInputStream());
String response = StreamTool.readLine(inStream);
            String[] items = response.split(";");
String position = items[1].substring(items[1].indexOf("=")+1);

RandomAccessFile fileOutStream = new RandomAccessFile(file, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer = new byte[1024];
int len = -1;
while( (len = fileOutStream.read(buffer)) != -1){
outStream.write(buffer, 0, len);
}
fileOutStream.close();
outStream.close();
            inStream.close();
            socket.close();
            file.delete();
            file = null;
            }
        } catch (Exception e) {