如何从java程序的服务器说话ftp协议接收和读取目录列表？ （没有FTPClient类）

Question

我应该从我的程序中获取此输出：

Sending message to server:
Returned message: 220 (vsFTPd 2.3.5) 
Sending message to server: USER anonymous
Returned message: 331 Please specify the password.
Sending message to server: PASS
Returned message: 230 Login successful.
Sending message to server: PASV
Returned message: 227 Entering Passive Mode (90,130,70,73,114,138)
Sending message to server: LIST
Returned message: 150 Here comes the directory listing.
-rw-r--r--    1 0        0        1073741824000 Feb 19  2016 1000GB.zip
-rw-r--r--    1 0        0        107374182400 Feb 19  2016 100GB.zip
....

我是java的新手，我不确定问题是在目录列表的接收上还是我试图读取它的方式。问题是我得到了其他答案，但不是目录列表。这是我的输出：

Sending message to server: Hello server!
Returned message: 220 (vsFTPd 2.3.5)
Sending message to server: USER anonymous
Returned message: 530 Please login with USER and PASS.
Sending message to server: PASS
Returned message: 331 Please specify the password.
Sending message to server: PASV
Returned message: 230 Login successful.
Returned message: 227 Entering Passive Mode (90,130,70,73,86,199).
Port is: 22215
Sending message to server: LIST

和我的代码：

System.out.println("Port is: " + getPort(returnedMessage5));
Socket client2 = new Socket("speedtest.tele2.net",   getPort(returnedMessage5));
PrintWriter output2 = new PrintWriter(client2.getOutputStream(), true);
BufferedReader input2 = new BufferedReader(new InputStreamReader(client2.getInputStream()));

System.out.println("Sending message to server: LIST");
output2.println("LIST");
String returnedMessage7 = input2.readLine();
System.out.println("Returned message: " + returnedMessage7);
System.out.println(returnedMessage7);

提前致谢并抱歉我的英文！

Answer 1

我已经解决了问题，问题是我通过被动端口发送LIST命令，我应该通过ftp端口21发送它，就像其他命令一样，并使用被动端口只接收数据。 谢谢！