在单个系统上运行客户端/服务器编 [英] running a client/server prog on a single system
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问题描述
我想知道是否有两个程序,一个叫做 server
,另一个叫做 client
,这两个在说明分别是服务器和客户端,是否可以在一台计算机上对其进行测试?考虑到我对客户端套接字的定义如下:
im wondering if there are two programs, one called server
and the other called client
and these two are illustrating a server and client respectively, is it possible to test them in one machine? considering i defined the client socket as follow:
socket = new Socket("127.0.0.1",3000);
编辑:
服务器部分:
Server part:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
class TCPServer
{
private static ServerSocket serverSocket;
private static Socket socket;
private static PrintWriter toClient;
private static BufferedReader fromClient;
public static void run() throws IOException
{
System.out.println("Server is waiting for connections...");
while (true)
{
openStreams();
processClient();
closeStreams();
}
}
public static void openStreams() throws IOException
{
serverSocket = new ServerSocket(3000);
socket = serverSocket.accept();
toClient = new PrintWriter(socket.getOutputStream(),true);
fromClient = new BufferedReader(new InputStreamReader(socket.getInputStream()));
}
public static void closeStreams() throws IOException
{
fromClient.close();
toClient.close();
socket.close();
serverSocket.close();
}
public static void processClient()throws IOException
{
String msg = null;
do {
msg = fromClient.readLine();
toClient.println("Client said " + msg);
} while (!"exit".equals(msg));
}
}
客户端部分:
package clientserver.pkg1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;
class TCPClient
{
private PrintWriter toServer;
private BufferedReader fromServer;
private Socket socket;
public void Client( )throws IOException
{
socket = new Socket("127.0.0.1",3000);
}
public void openStreams() throws IOException
{
toServer = new PrintWriter(socket.getOutputStream(),true);
fromServer = new BufferedReader(new InputStreamReader(socket.getInputStream()));
}
public void closeStreams() throws IOException
{
fromServer.close();
toServer.close();
socket.close();
}
public void run()throws IOException
{
openStreams();
String msg = "";
Scanner scanner = new Scanner(System.in);
while (!"exit".equals(msg))
{
System.out.print(">");
msg = scanner.nextLine();
toServer.println(msg);
String tmp = fromServer.readLine();
System.out.println("Server said: " + tmp);
}
closeStreams();
}
}
主班
public static void main(String[] args) {
try
{
TCPServer server = new TCPServer() {};
TCPClient client = new TCPClient();
client.run();
server.run();
}
catch(IOException e)
{
System.err.println("Error in Client " + e.getMessage());
}
java.lang.NullPointerException
1
1
toServer = new PrintWriter(socket.getOutputStream(),true);
2
2
public void run()throws IOException
{
openStreams();
.....
}
3
3
public static void main(String[] args) {
try
{
TCPClient client = new TCPClient();
client.run();
}
在 client.run();
推荐答案
您当然可以,只需将客户端和服务器连接到相同的端口号即可。
You certainly can, just have the client and server connected to the same port number.
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