Utility Class For Getting SQL Connection and Closing It

The following is a sample class which you can use as an utility in getting the mysql connections
and closing it (rather than writing the same code again and again to get and close the connection)

/* @author Kushal Paudyal*/
package com.ghumti.kschool.core.database;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import com.ghumti.fw.domain.KSEntity;

public class KSDBConnection extends KSEntity {
	private String dbUserName = "root";
	private String dbPassword = "";
	private String dbURL = "jdbc:mysql://localhost:3306/";
	private String database = "kschool";
	private String driver = "com.mysql.jdbc.Driver";

	public Connection getConnection() {
		Connection conn = null;
		try {
			conn = DriverManager.getConnection(getDbURL() + getDatabase(),
					getDbUserName(), getDbPassword());

		} catch (Exception e) {
		} finally {
			return conn;


	public void closeConnection(Connection dbConnection, String className) {
		try {
		} catch (SQLException e1) {
					+ ": Could not close database connection");


	 * Usage Example
	public static void main(String args[]) throws Exception {
		KSDBConnection ksdb = new KSDBConnection();
		Connection conn = ksdb.getConnection();

		String sqlQuery = "Select * from myTable";
		Statement st = conn.createStatement();

		 * Finally Close the connection The second parameter is just used for
		 * error printing
		ksdb.closeConnection(conn, KSDBConnection.class.getName());



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3 Responses to Calculating Folder Size In Java

  1. Pingback: Sanjaal.com » Latest Updates

  2. Jamie says:

    This approach uses less memory:

    public static class SizeCounter implements FileFilter
    private long total = 0;
    public SizeCounter(){};
    public boolean accept(File pathname) {
    if ( pathname.isFile()) {
    } else {
    return false;
    public long getTotal()
    return total;

    private static long getFileOrDirectorySize(File file) {
    SizeCounter counter = new SizeCounter();
    return counter.getTotal();

  3. kushalzone says:

    Thank you Jamie for your optimized solution.

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