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説明:これは、TCPソケットに基づくFTPプログラムのFTPClient.javaクラスです。私の教授は、私のプログラムはFTPClient.javaクラスのrun()メソッドのほかに良いと言っていました。彼は私のrun()メソッドは特定のコマンドを読むだけですべてを読んでいると言った。run()メソッドの問題
質問:私は、このメソッド内でString []型の出力= something.split( "")を使用する必要がありますか?私はこのメソッドの正しいコードを理解するのを助けてくれますか?
ありがとうございました!
package ftp.server;
import java.net.*;
import java.io.*;
public class FTPClient
{
private Socket socket = null;
private DataInputStream input = null;
private DataOutputStream output = null;
private BufferedReader keyboard = null;
final private String EXIT_CMD = "exit";
final private String PUT_CMD = "put";
final private String GET_CMD = "get";
public FTPClient(Socket socket) throws IOException
{
this.socket = socket;
input = new DataInputStream(socket.getInputStream());
output = new DataOutputStream(socket.getOutputStream());
keyboard = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
}
public void sendFile(String fileName) throws IOException
{
File file = new File(fileName);
if(!file.exists())
{
output.writeUTF("File " + fileName + " does not exist");
}
else
{
output.writeUTF(fileName);
FileInputStream inFile =
new FileInputStream(file);
int ch;
do
{
ch = inFile.read();
output.writeUTF(String.valueOf(ch));
}while(ch != -1);
inFile.close();
}
}
public void receiveFile(String fileName) throws IOException
{
output.writeUTF(fileName);
String msg = input.readUTF();
if(msg.equals("NOT_FOUND"))
{
output.writeUTF("No file in server");
}
else if(msg.equals("READY"))
{
File file = new File(fileName);
FileOutputStream outFile =
new FileOutputStream(file);
int ch;
String line;
do
{
line = input.readUTF();
ch = Integer.parseInt(line);
if(ch != -1)
{
outFile.write(ch);
}
}while(ch != -1);
outFile.close();
}
}
public void run() throws IOException
{
while(true)
{
System.out.println("ftp>");
String cmd = keyboard.readLine();
if(cmd.equals(PUT_CMD))
{
output.writeUTF(PUT_CMD);
sendFile("novel.dat");
}
if(cmd.equals(GET_CMD))
{
output.writeUTF(GET_CMD);
receiveFile("novel.dat");
}
if(cmd.equals(EXIT_CMD))
{
output.writeUTF(EXIT_CMD);
}
}
}
public static void main(String[] args) throws Exception
{
//check parameters
if(args.length != 2)
{
System.out.println("Usage: java FTPClient <host> <port>");
return;
}
//create socket
String host = args[0];
int port = Integer.parseInt(args[1]);
Socket socket = new Socket(host, port);
//run ftp client
FTPClient client = new FTPClient(socket);
client.run();
}
}