套接字关闭异常

时间:2013-10-24 04:48:20

标签: java sockets exception bufferedreader

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)

2 个答案:

答案 0 :(得分:10)

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。

答案 1 :(得分: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..