我遇到服务器首先发送文件大小和文件数据的情况。在客户端读取时,如何区分整数值和文件数据?
服务器的Sameple代码(os是bufferedoutputstream):
// Construct a 1K buffer to hold bytes on their way to the socket.
byte[] mybytearray = new byte[(int) myFile.length()];
//File Size
os.write((int) myFile.length());
FileInputStream fis = null;
System.out.println("test+sendbytes");
// Copy requested file into the socket's output stream.
try {
fis = new FileInputStream(myFile);
} catch (FileNotFoundException ex) {
// Do exception handling
}
BufferedInputStream bis = new BufferedInputStream(fis);
try {
bis.read(mybytearray, 0, mybytearray.length);
os.write(mybytearray, 0, mybytearray.length);
os.flush();
os.close();
os.close();
// File sent, exit the main method
return;
} catch (IOException ex) {
// Do exception handling
}
答案 0 :(得分:1)
除非假设所有文件的长度不超过255个字节,否则您需要将长度写为int
。尝试DataOutputStream.writeInt()
对于阅读,您必须承担订单。即你假设首先发送长度,然后发送内容。使用DataInputStream.readInt()读取长度。