好的，我正在嘗試學習Java客戶端/服務器方面的知識，并且正在按照以下教程代碼進行操作。當我將“

localhost”更改為我的IP時，它將停止工作。請幫忙。

編輯：“ 127.0.0.1”似乎也可以，但不是我的真實IP。

/*

* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

*

* - Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

*

* - Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

*

* - Neither the name of Sun Microsystems nor the names of its

* contributors may be used to endorse or promote products derived

* from this software without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

import java.net.*;

import java.io.*;

public class KnockKnockServer {

public static void main(String[] args) throws IOException {

ServerSocket serverSocket = null;

try {

serverSocket = new ServerSocket(4444);

} catch (IOException e) {

System.err.println("Could not listen on port: 4444.");

System.exit(1);

}

Socket clientSocket = null;

try {

clientSocket = serverSocket.accept();

} catch (IOException e) {

System.err.println("Accept failed.");

System.exit(1);

}

PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);

BufferedReader in = new BufferedReader(

new InputStreamReader(

clientSocket.getInputStream()));

String inputLine, outputLine;

KnockKnockProtocol kkp = new KnockKnockProtocol();

outputLine = kkp.processInput(null);

out.println(outputLine);

while ((inputLine = in.readLine()) != null) {

outputLine = kkp.processInput(inputLine);

out.println(outputLine);

if (outputLine.equals("Bye."))

break;

}

out.close();

in.close();

clientSocket.close();

serverSocket.close();

}

}

/*

* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

*

* - Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

*

* - Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

*

* - Neither the name of Sun Microsystems nor the names of its

* contributors may be used to endorse or promote products derived

* from this software without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

import java.io.*;

import java.net.*;

public class KnockKnockClient {

public static void main(String[] args) throws IOException {

Socket kkSocket = null;

PrintWriter out = null;

BufferedReader in = null;

try {

kkSocket = new Socket("localhost", 4444);

out = new PrintWriter(kkSocket.getOutputStream(), true);

in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));

} catch (UnknownHostException e) {

System.err.println("Don't know about host: taranis.");

System.exit(1);

} catch (IOException e) {

System.err.println("Couldn't get I/O for the connection to: taranis.");

System.exit(1);

}

BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));

String fromServer;

String fromUser;

while ((fromServer = in.readLine()) != null) {

System.out.println("Server: " + fromServer);

if (fromServer.equals("Bye."))

break;

fromUser = stdIn.readLine();

if (fromUser != null) {

System.out.println("Client: " + fromUser);

out.println(fromUser);

}

}

out.close();

in.close();

stdIn.close();

kkSocket.close();

}

}

這是我得到的錯誤。

java.net.ConnectException: Connection refused: connect

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.PlainSocketImpl.doConnect(Unknown Source)

at java.net.PlainSocketImpl.connectToAddress(Unknown Source)

at java.net.PlainSocketImpl.connect(Unknown Source)

at java.net.SocksSocketImpl.connect(Unknown Source)

at java.net.Socket.connect(Unknown Source)

at java.net.Socket.connect(Unknown Source)

at java.net.Socket.(Unknown Source)

at java.net.Socket.(Unknown Source)

at KnockKnockClient.main(KnockKnockClient.java:43)

總結

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