Java JDBC call

Java CSV Reader

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.HashMap;

public class CSVReader {
public HashMap getServerThesh() {
HashMap<String, String> serverThesh = new HashMap<String, String>();
try {
File file = new File("GD.csv");
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;
fis = new FileInputStream(file);

bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
while (dis.available() != 0) {
String line = dis.readLine();
String[] info = line.split(",");
serverThesh.put(info[0], info[1]);
}
return serverThesh;
} catch (Exception e) {
e.printStackTrace();
}
return serverThesh;
}

public static void main(String[] args) {
System.out.println(new CSVReader().getServerThesh().keySet().size());

}
}

Java File Transfer

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;

public class FileTransfer {
public static void main(String[] args) {

File f;
f = new File("myfile.txt");
File scpFile = new File("/tmp/myfile.txt");

if (!f.exists()) {
try {
f.createNewFile();
renameTo(f,scpFile);

// copyFile(f, scpFile);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

public static void copyFile(File in, File out) throws Exception {
FileInputStream fis = new FileInputStream(in);
FileOutputStream fos = new FileOutputStream(out);
try {
byte[] buf = new byte[1024];
int i = 0;
while ((i = fis.read(buf)) != -1) {
fos.write(buf, 0, i);
}
} catch (Exception e) {
throw e;
} finally {
if (fis != null)
fis.close();
if (fos != null)
fos.close();
}
}
public static void renameTo(File in, File out) {
FileChannel inChannel = null;
FileChannel outChannel = null;
try {
inChannel = new FileInputStream(in).getChannel();
outChannel = new FileOutputStream(out).getChannel();
inChannel.transferTo(0, inChannel.size(), outChannel);
in.delete();
} catch (Exception e) {
//LogManager.error(e.getMessage(), e);
} finally {
try {
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
} catch (Exception e) {
// LogManager.error(e.getMessage(), e);
}
}

}

}