[英]ByteBuffer over SocketChannel
我试图通过开始发送文件名来使文件通过IP(SocketChannel)移动。 我认为问题出在ByteBuffer的读取上,但是我不确定如何更正它。
FileSender部分:
public void sendFile(SocketChannel socketChannel) {
try {
File file = new File("B:\\Software\\OLD.zip");
String filename = file.getName();
byte[] nameBytes = filename.getBytes();
ByteBuffer nameBuffer = ByteBuffer.wrap(nameBytes);
socketChannel.write(nameBuffer);
//FileChannel inChannel = aFile.getChannel();
FileChannel inChannel = FileChannel.open(file.toPath());
ByteBuffer buffer = ByteBuffer.allocate(32 * 1024); // 32.76800 kilobytes
System.out.println(" Sendding nameBuffer: "+nameBuffer);
int bytesread = inChannel.read(buffer);
while (bytesread != -1) {
buffer.flip();
socketChannel.write(buffer);
buffer.compact();
bytesread = inChannel.read(buffer);
}
Thread.sleep(1000);
System.out.println(" System Info! @LargeFileSender - End of file reached!");
socketChannel.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
这是我认为导致问题的FileReceiver的一部分。
public void readFileFromSocket(SocketChannel socketChannel) {
long startTime = System.currentTimeMillis();
try {
ByteBuffer namebuff = ByteBuffer.allocate(512);
socketChannel.read(namebuff);
System.out.println(" Receiving namebuff: " + namebuff);
byte[] namebyte = new byte[512];
String filename = "";
int position = namebuff.position();
System.out.println(" Receiving position: " + position);
while (namebuff.hasRemaining()) {
namebyte[position] = namebuff.get();
position = namebuff.position();
}
filename = new String(namebyte, 0, position);
System.out.println(" File namebyte: " + namebyte[7]);
System.out.println(" File Name: " + filename);
File file = new File(filename);
ByteBuffer buffer = ByteBuffer.allocate(32 * 1024); // 32.76800
FileOutputStream aFile = new FileOutputStream(file);
FileChannel fileChannel = aFile.getChannel();
BigDecimal bigDecimal = new BigDecimal(0.0);
BigDecimal kilobyteDecimal = new BigDecimal(32.76);
while (socketChannel.read(buffer) > 0) {
buffer.flip();
fileChannel.write(buffer);
buffer.compact();
bigDecimal = bigDecimal.add(kilobyteDecimal);
}
Thread.sleep(1000);
fileChannel.close();
buffer.clear();
ProgressDial.main("false");
Thread.sleep(2000);
System.out.println(" System Info! @FileReceiver - Transfer completed!");
socketChannel.close();
aFile.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
我个人认为问题出在这里,因为文件名是“ null”
while (namebuff.hasRemaining()) {
namebyte[position] = namebuff.get();
position = namebuff.position();
}
filename = new String(namebyte, 0, position);
任何帮助将不胜感激。
非常感谢
经过测试和尝试后,我终于使用StringBuilder解决了我的问题,其结果正是我想要的:FileName:
try {
ByteBuffer namebuff = ByteBuffer.allocate(256);
socketChannel.read(namebuff);
int position = namebuff.position();
namebuff.rewind();
String filename = "";
int startPosition = 0;
System.out.println(" Receiving position: "+position);
StringBuilder sb = new StringBuilder();
while (startPosition < position) {
sb.append((char)namebuff.get());
startPosition++;
}
filename = sb.toString();
System.out.println(" FileName: "+filename);
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