为什么客户端应用程序不从服务器目录获取文件列表？

Question

在我的客户端-服务器应用程序中，我正试图从服务器的当前目录中打印出文件列表。此时，我的程序能够检索文件名并显示，但问题是，结果（带有文件列表）会显示在服务器窗口中，这是我所没有想到的。

我希望一旦我发送相应的命令（从客户端），它就应该在同一窗口（在客户端）中返回列出的文件。

我正在处理的代码是：

服务器类别：

package server;
import java.io.*;
import java.net.*;
public class AreaServer {
    private static final int PORT = 8000;
    private ServerSocket serverSocket;
    public static void main(String[] args) {
        int port = PORT;
        if (args.length == 1) {
            port = Integer.parseInt(args[0]);
        }
        new AreaServer(port);
    }
    public AreaServer(int port) {
        try {
            serverSocket = new ServerSocket(port);
        } catch (IOException e) {
            System.err.println("Error in creation of the server socket");
            System.exit(0);
        }
        while (true) {
            try {
                Socket socket = serverSocket.accept();

                DataInputStream inputFromClient = new DataInputStream(socket.getInputStream());
                DataOutputStream outputToClient = new DataOutputStream(socket.getOutputStream());

                while (true) {
                    String commandPWD = inputFromClient.readUTF();
                    String workingDir = System.getProperty("user.dir");
                    outputToClient.writeUTF(workingDir);
                    String commandGetList = inputFromClient.readUTF();
file)
                    File fileList = new File(".");
                    getFiles(fileList);//method calling
                    outputToClient.writeUTF(fileList.toString());
                }
            } catch (IOException e) {
                System.err.println(e);
            }
        }
    }
    private static void getFiles(File fileList) {
        File[] listOfFile = fileList.listFiles();
        for (File f : listOfFile) {
            if (f.isDirectory()) {
                System.out.println(f.getName());
            }
            if (f.isFile()) {
                System.out.println(f.getName());
            }
        }
}
}

客户端类别：

   package clint;
    import java.io.*;
    import java.net.*;
    import java.util.Scanner;
    public class AreaClient {
        private static final int PORT = 8000;
        private static final String SERVER = "194.47.46.146";
        public static void main(String[] args) {
            String server = "localhost";
            int port = PORT;
            if (args.length >= 1) {
                server = args[0];
            }
            if (args.length >= 2) {
                port = Integer.parseInt(args[1]);
            }
            new AreaClient(server, port);
        }
        public AreaClient(String server, int port) {
            DataInputStream inputFromServer;
            DataOutputStream outputToServer;
            try {
                Socket socket = new Socket(server, port);
                inputFromServer = new DataInputStream(socket.getInputStream());
                outputToServer = new DataOutputStream(socket.getOutputStream());
                Scanner sc = new Scanner(System.in);
                System.out.println("Enter pwd command: ");
                while (sc.hasNext()) {
                    String commandPWD = sc.nextLine();
                    outputToServer.writeUTF(commandPWD);
                    outputToServer.flush();
                    String workingDir = inputFromServer.readUTF();
                    System.out.println("Working directory is: " + workingDir);
                    System.out.println("Enter getList command: ");
                    String commandGetList = sc.nextLine();
                    outputToServer.writeUTF(commandGetList);
                    outputToServer.flush();

                    String listedFileFromSErver = inputFromServer.readUTF();
                    System.out.println("You have the following files in the server directory: " + listedFileFromSErver);
                }
                inputFromServer.close();
                outputToServer.close();
                socket.close();
            } catch (IOException e) {
                System.err.println(e);
            }
        }
    }

Answer 1

它打印出文件列表，因为你的getFiles方法对说

if (f.isDirectory()) {
            System.out.println(f.getName());
        }
        if (f.isFile()) {
            System.out.println(f.getName());
        }