Java NIO写入异常问题报错
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在使用NIO进行写入数据时，我把缓冲区增大1000k，为什么这时会出现没有写完的情况？？
public class Server {public static void main(String[] args) throws Exception { ServerSocketChannel serverSocketChannel = ServerSocketChannel.open(); serverSocketChannel.configureBlocking(false); serverSocketChannel.bind(new InetSocketAddress("localhost", 7077));
Selector selector = Selector.open();
serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT);
selector.select();
Set<SelectionKey> selectedKeysSet = selector.selectedKeys();
Iterator<SelectionKey> iterator = selectedKeysSet.iterator();
while (iterator.hasNext()) {
SelectionKey key = iterator.next();
SocketChannel socketChannel = ((ServerSocketChannel) key.channel()).accept();
socketChannel.configureBlocking(false);
ByteBuffer byteBuffer = ByteBuffer.allocate(1000 * 1024);
System.out.println("byteBuffer.limit()=" + byteBuffer.limit());
socketChannel.write(byteBuffer);
System.out.println("byteBuffer.position()=" + byteBuffer.position());
socketChannel.close();
}
serverSocketChannel.close();
} }
public class Client {public static void main(String[] args) throws Exception { SocketChannel channel1 = SocketChannel.open(); channel1.connect(new InetSocketAddress("localhost", 7077)); TimeUnit.MINUTES.sleep(1); channel1.close(); } }
byteBuffer.limit()=1024000byteBuffer.position()=261676
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写回答
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阿里，我所有的向往"
猜测是你设置的不准确，按照你的代码，我做了测试：
<code class=""java"">while (iterator.hasNext()) { SelectionKey key = iterator.next(); SocketChannel socketChannel = ((ServerSocketChannel) key.channel()).accept(); //设置缓冲区大小 socketChannel.setOption(StandardSocketOptions.SO_SNDBUF,1000 * 1024);System.out.println(socketChannel.getOption(StandardSocketOptions.SO_SNDBUF)); socketChannel.configureBlocking(false); ByteBuffer byteBuffer = ByteBuffer.allocate(1000 * 1024); System.out.println("byteBuffer.limit()=" + byteBuffer.limit()); System.out.println(socketChannel.write(byteBuffer)); System.out.println("byteBuffer.position()=" + byteBuffer.position()); socketChannel.close();}
//输出 1024000 byteBuffer.limit()=1024000 1024000 byteBuffer.position()=1024000
######没有规定必须一次就把全部数据写完吧，
"2020-05-27 17:52:25赞同 展开评论 打赏
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