BufferedInputStream 和阻塞
我正在使用 BufferedInputStream 从套接字读取。 BufferedInputStream 的内容如下：
socketInput.read(replyBuffer, 0, 7);
它由 mySocket 实例化
socketInput = new BufferedInputStream(mySocket.getInputStream());
，定义为 private Socket mySocket;
mySocket 由以下实例化mySocket = new Socket(ipAddress, port);
我已验证 mySocket 已连接到我的设备。我可以将数据发送到我的设备；但是，由于未知原因，我没有从我的设备接收信息，但这不是问题所在。
我希望我的 BufferedInputStream 如果未读取任何数据，则在 100 毫秒后返回。可以设置 BufferedInputStream 来执行此操作吗？现在，它无限期地阻塞。
I am using a BufferedInputStream to read from a socket. The BufferedInputStream reads as follows:
socketInput.read(replyBuffer, 0, 7);
It is instantiated by
socketInput = new BufferedInputStream(mySocket.getInputStream());
mySocket is defined as private Socket mySocket;
mySocket is instantiated by mySocket = new Socket(ipAddress, port);
I have verified that mySocket is connected to my device. I can send data to my device; however, I am not receiving from my device for unknown reasons but that is not the problem.
I want my BufferedInputStream to return after say 100ms if it does not read any data. Can the BufferedInputStream be setup to do this? Right now, it blocks indefinitely.
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使用缓冲流从套接字读取通常是一个坏主意，正是因为这个原因：如果它没有看到足够的数据来填充其内部缓冲区（它将大于 7 个字符！），它将永远等待没有办法让它超时。只需直接使用
SocketInputStream，问题就消失了。It's generally a bad idea to use a buffered stream for reading from a socket, for exactly this reason: it will wait forever if it doesn't see enough data to fill its internal buffer (which is going to be larger than 7 characters!) There's no way to make it time out. Just use the
SocketInputStreamdirectly, and the problem goes away.为您的套接字指定 100 毫秒超时。 setSoTimeout
Specify 100ms timeout for your socket. setSoTimeout