Question

我写了一个简单的服务器和客户端示例，如下所示。

客户：

打开连接
获取输出流，写入流并关闭输出流

获取输入流并从流中读取。此时获得例外

public class DateServer {
public static void main(String[] args) throws InterruptedException {
ServerSocket serverSocket = null;
Socket client = null;
try {
    serverSocket = new ServerSocket(6013);
    while (true) {
        client = serverSocket.accept();
        OutputStream outputStream = client.getOutputStream();
        InputStream inputStream = client.getInputStream();

        System.out.println("" + outputStream + "-" + inputStream);

        BufferedReader bufferedReader = new BufferedReader(
                new InputStreamReader(inputStream));

        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
            System.out
                    .println("Message recieved from client ::" + line);
        }

        PrintWriter printWriter = new PrintWriter(outputStream, true);

        printWriter.println(new java.util.Date().toString());

        client.close();
    }
} catch (IOException exception) {
    exception.printStackTrace();
    System.err.println(exception);
}
    }

    }

客户：

    public class DateClient {

public static void main(String[] args) throws UnknownHostException,
        IOException, InterruptedException {
    Socket sock = new Socket("127.0.0.1", 6013);
    OutputStream outputStream = sock.getOutputStream();
    InputStream inputStream = sock.getInputStream();

    System.out.println("" + outputStream + "-" + inputStream);

    PrintWriter printWriter = new PrintWriter(outputStream, true);
    printWriter.println("Hi Server");

    outputStream.close();

    System.out.println(sock.isConnected());

    BufferedReader bufferedReader = new BufferedReader(
            new InputStreamReader(inputStream));
    String line;
    while ((line = bufferedReader.readLine()) != null) { // Exception 
        System.out.println(line);
    }

}

}

在客户端中获取以下套接字已关闭的异常。能不能让我知道原因是什么。

  Exception in thread "main" java.net.SocketException: Socket closed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:146)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:176)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:153)
at java.io.BufferedReader.readLine(BufferedReader.java:316)
at java.io.BufferedReader.readLine(BufferedReader.java:379)
at edu.iub.cs.httpserver.DateClient.main(DateClient.java:32)

Answer 1

java.net.SocketException套接字已关闭此异常意味着您关闭了套接字，然后继续尝试使用它。

os.close();

你在这里关闭它。关闭Socket的输入或输出流将关闭另一个流和Socket。

Answer 2

java.net.SocketException只有在您从服务器读取之前关闭OutputStream（或）套接字时才会出现。

从您的代码中删除：

OutputStream.close();

然后尝试..

套接字关闭异常

2 个答案: