FTPClient.java

package me.Kelson;
//This class may be used later

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URL;
import java.net.URLConnection;
public class FTPClient {

    private URLConnection client;
    private String host;
    private String username;
    private String password;
    private String remoteFile;
    private String error;
    private String success;

    public FTPClient(String host, String username, String password){
        this.host = host;
        this.username = username;
        this.password = password;
    }
    public FTPClient(){

    }

    public void setHost(String host){
        this.host = host;
    }

    public void setUser(String username){
        this.username = username;
    }

    public void setPassword(String password){
        this.password = password;
    }

    public void setRemoteFile(String file){
        remoteFile = file;
    }

    public synchronized String getSucMsg(){
        if(success != null)
            return success;
        return null;
    }

    public synchronized String getErrMsg(){
        if(error != null)
            return error;
        return null;
     }

    public synchronized boolean uploadFile(String fileLoc){
        try {
            InputStream is = new FileInputStream(fileLoc);
            @SuppressWarnings("resource")
            BufferedInputStream bis = new BufferedInputStream(is);
            OutputStream os = client.getOutputStream();
            BufferedOutputStream bos = new BufferedOutputStream(os);

            byte[] buffer = new byte[1024];

            int count;
            while((count = bis.read(buffer)) > 0)
                bos.write(buffer, 0, count);
            bos.close();
            success="Uploaded!";
            return true;
        } catch(Exception e){
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw, true);
            e.printStackTrace(pw);
            error = sw.getBuffer().toString();
            return false;
        }
    }

    public synchronized boolean downloadFile(String fileLoc){
        try {
        InputStream is = client.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);
        OutputStream os = new FileOutputStream(fileLoc);
        BufferedOutputStream bos = new BufferedOutputStream(os);

        byte[] buffer = new byte[1024];

        int count;
        while ((count = bis.read(buffer)) > 0)
            bos.write(buffer, 0, count);
        bos.close();
        is.close();
        success="Downloaded!";

        return true;
        } catch(Exception e){
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw, true);
            e.printStackTrace(pw);
            error = sw.getBuffer().toString();
            return false;
        }
    }
    public synchronized boolean connect(){
        try {
            URL url = new URL("ftp://" + username + ":" + password + "@"+ host
                    + "/" + remoteFile + ";type=i");
            client = url.openConnection();
            return true;
        } catch(Exception e){
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw, true);
            e.printStackTrace(pw);
            error = sw.getBuffer().toString();
            return false;
        }
    }
}