Ttykuu

Java noob trying my hand at basic FTP. Trying to turn an Apache Commons Net FTP tutorial into a functioning program where users enter server, user, pass and can modify/add/view/delete files.

However, whenever I get to the "list files" command I receive an unusual error. The error is:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 

The import org.apache.oro cannot be resolved

The import org.apache.oro cannot be resolved

The import org.apache.oro cannot be resolved

The import org.apache.oro cannot be resolved

The import org.apache.oro cannot be resolved

The import org.apache.oro cannot be resolved

Pattern cannot be resolved to a type

MatchResult cannot be resolved to a type

PatternMatcher cannot be resolved to a type

_matcher_ cannot be resolved

Perl5Matcher cannot be resolved to a type

pattern cannot be resolved

Perl5Compiler cannot be resolved to a type

MalformedPatternException cannot be resolved to a type

result cannot be resolved or is not a field

_matcher_ cannot be resolved

pattern cannot be resolved or is not a field

result cannot be resolved or is not a field

_matcher_ cannot be resolved

result cannot be resolved or is not a field

result cannot be resolved or is not a field

result cannot be resolved or is not a field

result cannot be resolved or is not a field

result cannot be resolved or is not a field

result cannot be resolved or is not a field

result cannot be resolved or is not a field



at org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl.<init>(RegexFTPFileEntryParserImpl.java:19)

at org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl.<init>(ConfigurableFTPFileEntryParserImpl.java:57)

at org.apache.commons.net.ftp.parser.UnixFTPEntryParser.<init>(UnixFTPEntryParser.java:136)

at org.apache.commons.net.ftp.parser.UnixFTPEntryParser.<init>(UnixFTPEntryParser.java:119)

at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createUnixFTPEntryParser(DefaultFTPFileEntryParserFactory.java:169)

at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createFileEntryParser(DefaultFTPFileEntryParserFactory.java:94)

at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2359)

at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2142)

at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2188)

at ftpconnecter.FTPConnecter.run(FTPConnecter.java:74)

at ftpconnecter.Main.main(Main.java:11)

The class itself is below. Entering a blank line for path in makeDir is what triggers the error. However, the error message is saying that it occurs at line 74, which is the else if for the createDir method. There's no Exception listed either, which I haven't seen before in a Java error message.

As an ancillary question, is the way I'm setting up this method, with one big try-catch block, an effective way of structuring this program?

package ftpconnecter;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Scanner;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;

public class FTPConnecter 

 public void run() 

 Scanner reader = new Scanner(System.in);

 while(true) 

 System.out.println("Connect to FTP? (Anything other than Yes quits app)");
 String input = reader.nextLine();

 if (!input.equals("Yes")) 
 break;
 

 System.out.println("Server address?");
 String server = reader.nextLine().trim();
 System.out.println("Username");
 String user = reader.nextLine();
 System.out.println("Password:");
 String pass = reader.nextLine();
 int port = 21;

 FTPClient ftpClient = new FTPClient();


 try 

 ftpClient.connect(server, port);
 showServerReply(ftpClient);

 int replyCode = ftpClient.getReplyCode();
 if (!FTPReply.isPositiveCompletion(replyCode)) 
 System.out.println("Connect failed");
 continue;
 

 boolean success = ftpClient.login(user, pass);
 showServerReply(ftpClient);

 if (!success) 
 System.out.println("Could not login to the server");
 continue;
 


 while(true) 

 System.out.println("Commands: " + "n" +
 "1. List Files & Directories (L)" + "n" +
 "2. Create New Directory (D)" + "n" +
 "3. Create Nested Directory (N)");
 String command = reader.nextLine();

 if (command.equals("L")) 
 System.out.println("What is the file path? (Press enter for all)");
 String filePath = reader.nextLine();
 FTPFile[] files = ftpClient.listFiles(filePath);
 printFileDetails(files); 
 else if (command.equals("D")) 
 createDir(ftpClient);
 else if (command.equals("N")) 
 System.out.println("What is your directory path?");
 String path = reader.nextLine();
 makeDir(ftpClient, path);
 else 
 break;
 

 

 ftpClient.logout();
 ftpClient.disconnect();

 catch (IOException ex) 
 System.out.println("Oops! Something went wrong");
 ex.printStackTrace();
 

 

 

 private static void showServerReply(FTPClient ftpClient) 
 String[] replies = ftpClient.getReplyStrings();

 if (replies != null && replies.length > 0) 
 for (String aReply : replies) 
 System.out.println("SERVER: " + aReply);
 
 
 

 private void createDir(FTPClient ftpClient) throws IOException 
 Scanner reader = new Scanner(System.in);

 System.out.println("What is the directory to be created?");
 String dirToCreate = reader.nextLine();

 boolean success = ftpClient.makeDirectory(dirToCreate);
 showServerReply(ftpClient);

 if (success) 
 System.out.println("Successfully created directory: " + dirToCreate);
 else 
 System.out.println("Failed to create directory. See server's reply.");
 

 

 private void makeDir(FTPClient ftpClient, String dirPath) throws IOException 
 String[] pathElements = dirPath.split("/");

 if (pathElements != null && pathElements.length > 0) 
 for (String singleDir : pathElements) 
 boolean exists = ftpClient.changeWorkingDirectory(singleDir);

 if (!exists) 
 boolean created = ftpClient.makeDirectory(singleDir);

 if (created) 
 System.out.println("Created directory " + singleDir);
 else 
 System.out.println("Could not create directory " + singleDir);
 
 
 

 
 

 private void printFileDetails(FTPFile[] files) 
 DateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

 for (FTPFile file : files) 
 String details = file.getName();

 if (file.isDirectory()) 
 details = "[" + details + "]";
 

 details += "tt" + file.getSize();
 details += "tt" + dateFormater.format(file.getTimestamp().getTime());

 System.out.println(details);