尝试从socket读取时发生java非法阻止模式异常
我对Java非常陌生,正在尝试编写一个发送方-通道-接收方设置代码,其中通道表示传输介质,并向数据包引入错误。因此,通道使用服务器socket通道连接到发送方和接收方。
大多数情况都很好,但是当我尝试读取通道内的对象Packet
时,它抛出IllegalBlockingModeException
。发送方抛出似乎是相应的IO异常,“远程主机强制关闭了现有连接”。Channel
程序中的代码如下(为了简单起见,排除了某些部分):
Set<SelectionKey> selectedKeys = selector.selectedKeys();
Iterator<SelectionKey> keyIterator = selectedKeys.iterator();
while (keyIterator.hasNext()) {
SelectionKey key = keyIterator.next();
keyIterator.remove();
if (key.isAcceptable()) {
SocketChannel sc = ((ServerSocketChannel) key.channel()).accept();
sc.configureBlocking(false);
sc.register(selector, SelectionKey.OP_READ);
}
if (key.isReadable()) {
SocketChannel sc = (SocketChannel) key.channel();
sc.configureBlocking(false);
Packet packet = readPacket(sc);
sc.close();
// do things with the packet...
其中readPacket
定义如下:
private static Packet readPacket(SocketChannel sc) throws IOException,
ClassNotFoundException {
ObjectInputStream in = new
ObjectInputStream(sc.socket().getInputStream());
Packet packet = (Packet) in.readObject();
return packet;
}
是否有人能够解释抛出异常的原因以及如何纠正异常
# 1 楼答案
溪流阻塞。不能在非阻塞模式下使用它们。参见Javadoc