Question

我已经阅读了Stack-overflow中大多数类似的问题。但我无法找到类似的。我构建了一个客户端和一个服务器。对于我的客户端网络，我构建了一个包含套接字和许多相关方法的类：

    public class Connector {
    private Socket socket;
    private DataOutputStream output;
    private DataInputStream input;

    public Connector(int x) throws UnknownHostException, IOException{
        socket=new Socket("localhost",x);
    }

    public boolean isConnected(){
        return socket.isConnected();
    }

    public void sendInfo(String str) throws IOException{
        output = new DataOutputStream(socket.getOutputStream());
        output.writeUTF(str);
        output.flush();
    }

    public String receiveInfo() throws IOException{
        input = new DataInputStream(socket.getInputStream());
        return input.readUTF();
    }

    public boolean loginSuccess() throws IOException{
        input = new DataInputStream(socket.getInputStream());
        return input.readBoolean();
    }
}

当我的客户端运行时（服务器在我的IDE中运行），

    String userAccount = "VerifyAccount" + "@" + userNametf.getText() + "@" + passwordtf.getText() + "@" + i;
            connector.sendInfo(userAccount);
            if(connector.isConnected())
                System.out.println("the connector is still connected!");
            else
                System.out.println("the connector is no connected!");
            if(connector.loginSuccess()){
                System.out.println("Log in success");
            }
            else;

这是我的服务器：

    ServerSocket serverSocket = new ServerSocket(8000);
    while(true){
        Socket socket = serverSocket.accept();
        Thread thread = new Thread(()->{
        try{
            DataInputStream input = new DataInputStream(socket.getInputStream());
            DataOutputStream output = new DataOutputStream(socket.getOutputStream());
            String tempStr = input.readUTF();
            System.out.println("Server receive data : "+tempStr);
            String[] tempStrArray = tempStr.split("@");
            if(tempStrArray[0].equals("VerifyAccount")){
                if(UserVerification.isValid(tempStr.substring(14))==1){
                    output.writeBoolean(true);
                    output.flush();
                }
                else{}
            }
            else if(tempStrArray[0].equals("RegisterAccount")){}
            else{}
                }
        catch(IOException ex){
            ex.printStackTrace();
        }
        });
        thread.start();
    }

所以整个过程是客户端套接字连接到服务器套接字，然后客户端向服务器发送一个字符串，服务器处理字符串，并将一个布尔值写回客户端，但是当我调用connector.LoginSuccess（）时，编译器将抛出这样的异常：enter image description here < / p>

Answer 1

您永远不会关闭已接受的套接字。您还尝试读取可能永远不会发送的布尔值。而且，正如我在评论中所说，isConnected()没有按照你的想法做到：当对等方断开连接时，它不会神奇地开始返回false。

java.net.SocketException：connection reset

1 个答案: