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我做了一個簡單的聊天，它按照設計工作，如果在一個IP上運行服務器，而在另一個IP上運行客戶端。此聊天適用於網絡。問題是 - 當我嘗試在我的計算機上運行服務器時，我的計算機上的客戶端無法運行。但是如果有其他IP的人嘗試連接到服務器 - 一切正常。可能是什麼問題？如何在與套接字服務器相同的計算機（IP）上運行套接字客戶端？
服務器：
/**
* Created by rnd on 7/4/2017.
*/
import java.io.*;
import java.net.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.*;
public class VerySimpleChatServer {
ArrayList clientOutputStreams;
ArrayList<String> m_history;
public static void main (String[] args) {
new VerySimpleChatServer().go();
}
public void go() {
clientOutputStreams = new ArrayList();
m_history = new ArrayList<String>();
try {
ServerSocket serverSock = new ServerSocket(10001);
while(true) {
Socket clientSocket = serverSock.accept();
Charset charset = StandardCharsets.UTF_8;
OutputStreamWriter osw = new OutputStreamWriter(clientSocket.getOutputStream(), charset);
PrintWriter writer = new PrintWriter(new BufferedWriter(osw));
// PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
writer.println("Welcome to the chat 7 kids.... Семеро Козлят");
writer.flush();
clientOutputStreams.add(writer);
Thread t = new Thread(new ClientHandler(clientSocket));
t.start() ;
System.out.println("got a connection");
}
} catch(Exception ex) {
ex.printStackTrace();
}
} // Закрываем go
public class ClientHandler implements Runnable {
BufferedReader reader;
Socket sock;
public ClientHandler(Socket clientSocket) {
try {
sock = clientSocket;
InputStreamReader isReader = new InputStreamReader(sock.getInputStream(), StandardCharsets.UTF_8);
reader = new BufferedReader(isReader);
} catch(Exception ex) {ex.printStackTrace();}
} // Закрываем конструктор
public void run() {
String message;
tellHistory(m_history);
try {
while ((message = reader.readLine()) != null) {
System.out.println("read " + message);
m_history.add(message);
tellEveryone(message);
} // Закрываем while
} catch(Exception ex) {ex.printStackTrace();}
} // Закрываем run
} // Закрываем вложенный класс
public void tellEveryone(String message) {
Iterator it = clientOutputStreams.iterator();
while(it.hasNext()) {
try {
PrintWriter writer = (PrintWriter) it.next();
writer.println(message);
writer.flush();
} catch(Exception ex) {
ex.printStackTrace();
}
} // Конец цикла while
} // Закрываем tellEveryone
public void tellHistory(ArrayList<String> history){
try {
PrintWriter writer1 = (PrintWriter) clientOutputStreams.get(clientOutputStreams.size() - 1);
for (int i = 0; i < history.size(); i++) {
writer1.println(history.get(i));
}
//Идея в том, что бы вызывать историю только для последнего PrintWriter
//может быть getsize поставить вместо i - writer1.println(history.get(history.size()));
writer1.flush();
} catch(Exception ex) {
ex.printStackTrace();
}
}
} // Закрываем класс
客戶：
/**
* Created by rnd on 7/4/2017.
*/
import java.io.*;
import java.net.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class SimpleChatClient {
JTextArea incoming;
JTextField outgoing;
JTextField name;
BufferedReader reader;
PrintWriter writer;
Socket sock;
String Myname;
public static void main(String[] args) {
SimpleChatClient client = new SimpleChatClient();
client.go();}
public void go(){
JFrame frame = new JFrame("Ludicrously Simple Chat Client");
JPanel mainPanel = new JPanel();
incoming = new JTextArea(15,50);
incoming.setLineWrap(true);
incoming. setWrapStyleWord (true) ;
incoming.setEditable(false);
JScrollPane qScroller = new JScrollPane(incoming);
qScroller. setVerticalScrollBarPolicy (ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS) ;
qScroller. setHorizontalScrollBarPolicy (ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS) ;
outgoing = new JTextField(20);
name = new JTextField(5);
JButton sendButton = new JButton("Send") ;
JLabel label1 = new JLabel("name");
sendButton.addActionListener(new SendButtonListener());
mainPanel.add(qScroller);
mainPanel.add(label1);
mainPanel.add(name);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
setUpNetworking();
Thread readerThread = new Thread(new IncomingReader());
readerThread.start();
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
frame.setSize(800,500);
frame.setVisible(true);
}
private void setUpNetworking() {
try {
sock = new Socket("178.165.87.221", 10001);
// sock = new Socket("127.0.0.1", 10001);
InputStreamReader streamReader = new InputStreamReader(sock.getInputStream(), StandardCharsets.UTF_8);
reader = new BufferedReader(streamReader);
Charset charset = StandardCharsets.UTF_8;
OutputStreamWriter osw = new OutputStreamWriter(sock.getOutputStream(), charset);
writer = new PrintWriter(new BufferedWriter(osw));
// writer = new PrintWriter(sock.getOutputStream());
System.out.println("networking established");
} catch (IOException ex) {
ex.printStackTrace();}
}
public class SendButtonListener implements ActionListener {
public void actionPerformed (ActionEvent ev) {
try {
Myname = name.getText();
writer.println(Myname + ": " + outgoing.getText());
writer.flush();
} catch(Exception ex) {
ex.printStackTrace();
}
outgoing. setText ("") ;
outgoing.requestFocus() ;}
}
public class IncomingReader implements Runnable{
@Override
public void run() {
String message;
try{
while((message=reader.readLine())!=null){
System.out.println("read " + message);
incoming.append(message + "\n");
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
你監聽所有網絡接口的本地IP？ –
是這個'178.165.87.221'服務器機器的本地IP地址？本地，如果你在終端中運行'ipconfig'或'ifconfig'，你會看到這個ip – Yazan
我已經取消註釋'sock = new Socket（「127.0.0.1」，10001）;'行和客戶端運行時沒有任何異常。確切地說，是 – eparvan