Question

我编写了以下客户端，该客户端仅连接到本地主机，即连接机器的IP，而不是连接到不同计算机上不同IP的服务器。我连接到外面时遇到的错误是Connection拒绝如何让它连接到本地主机外？

我的代码如下

public ChatClient(JTextField address, JTextField port, JTextField user,
        JTextField text, JTextArea tapane3, JTextArea tapane4) {
    // TODO Auto-generated constructor stub
    this.address=address;
    this.user=user;
    this.text=text;
    this.port=port;
    add=address.getText();
    textarea=tapane3;
    showusers=tapane4;
}

public void sendToPort(String str) throws IOException {
    Socket socket = null;

    //String str = "Hello World";
    try {
        out.write(str, 0, str.length());
        out.flush();
    } catch (IOException e) {
        System.err.print(e);
    } finally {

    }

}

@SuppressWarnings("deprecation")
@Override
public void actionPerformed(ActionEvent e) {
    // TODO Auto-generated method stub

    if(e.getActionCommand().equals("Send")) 
    {

        try {
            textarea.append(SendMessage()+"\n");
            System.out.println(SendMessage());
            sendToPort("x");
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

    }

    else if(e.getActionCommand().equals("Connect")) 
    {

        try {
            String prt=port.getText();

            cs = new Socket(add, Integer.parseInt(prt));
            out =new OutputStreamWriter(cs.getOutputStream(), "UTF-8");

            showusers.setText(user.getText());

            //sendToPort(Integer.parseInt(prt), Address); 




        } catch (NumberFormatException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (UnknownHostException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }


    }
    else if(e.getActionCommand().equals("Disconnect")) 
    {


        try {
            cs.close();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }


    }
}

public void Connect() throws NumberFormatException, UnknownHostException, IOException {
    // TODO Auto-generated method stub



}

public String SendMessage() {
    // TODO Auto-generated method stub
     {


         DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
         Date date = new Date();
         String getdate=(dateFormat.format(date));

            String content = text.getText();                
            String from = String.format(user.getText());
            String all = "START:" + getdate + ":" + from + ":"+"MESSAGE:" + content + ":END";
            //textarea.setText(all);
             try {
            out.write(all);
             out.flush();

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


            return all;

}

Answer 1

首先，你需要使用机器的计算机公共IP，而不是你的本地主机。 https://www.whatismyip.com/

此外，您需要移植您的端口。你可以在这里阅读和学习如何做： http://portforward.com/

我的聊天客户端只连接到本地主机

1 个答案: