package com.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.SQLException;
 
public class ConnectionUtils {
 
    public static Connection getMyConnection() throws SQLException,
            ClassNotFoundException {
   
        // Using Oracle
        // You may be replaced by other Database.
        return OracleConnUtils.getOracleConnection();
    }
 
    //
    // Test Connection ...
    //
    public static void main(String[] args) throws SQLException,
            ClassNotFoundException {
 
        System.out.println("Get connection ... ");
 
        // Get a Connection object
        Connection conn = ConnectionUtils.getMyConnection();
 
        System.out.println("Get connection " + conn);
 
        System.out.println("Done!");
    }
 
                }

package org.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class OracleConnUtils {
 
    // Connect to Oracle.
    public static Connection getOracleConnection() throws SQLException,
            ClassNotFoundException {
        String hostName = "localhost";
        String sid = "db11g";
        String userName = "simplehr";
        String password = "1234";
 
        return getOracleConnection(hostName, sid, userName, password);
    }
 
    public static Connection getOracleConnection(String hostName, String sid,
            String userName, String password) throws ClassNotFoundException,
            SQLException {
        
        // Declare the class Driver for ORACLE DB
        // This is necessary with Java 5 (or older)
        // Java6 (or newer) automatically find the appropriate driver.
        // If you use Java> 5, then this line is not needed.        
        Class.forName("oracle.jdbc.driver.OracleDriver");
 
        String connectionURL = "jdbc:oracle:thin:@" + hostName + ":1521:" + sid;
 
        Connection conn = DriverManager.getConnection(connectionURL, userName,
                password);
        return conn;
    }
}

package com.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class MySQLConnUtils {
 
 
   // Connect to MySQL
   public static Connection getMySQLConnection() throws SQLException,
           ClassNotFoundException {
       String hostName = "localhost";
 
       String dbName = "simplehr";
       String userName = "root";
       String password = "1234";
 
       return getMySQLConnection(hostName, dbName, userName, password);
   }
 
   public static Connection getMySQLConnection(String hostName, String dbName,
           String userName, String password) throws SQLException,
           ClassNotFoundException {
       // Declare the class Driver for MySQL DB
       // This is necessary with Java 5 (or older)
       // Java6 (or newer) automatically find the appropriate driver.
       // If you use Java> 5, then this line is not needed.
       Class.forName("com.mysql.jdbc.Driver");
 
       String connectionURL = "jdbc:mysql://" + hostName + ":3306/" + dbName;
 
       Connection conn = DriverManager.getConnection(connectionURL, userName,
               password);
       return conn;
   }
}

package com.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class SQLServerConnUtils_JTDS {
 
 
   // Connect to SQLServer
   // (Using JDBC Driver of JTDS library)
   public static Connection getSQLServerConnection()
           throws SQLException, ClassNotFoundException {
       String hostName = "localhost";
       String sqlInstanceName = "SQLEXPRESS";
       String database = "simplehr";
       String userName = "sa";
       String password = "1234";
 
       return getSQLServerConnection(hostName, sqlInstanceName, database,
               userName, password);
   }
 
   // Connect to SQLServer & using JTDS library
   public static Connection getSQLServerConnection(String hostName,
           String sqlInstanceName, String database, String userName,
           String password) throws ClassNotFoundException, SQLException {
 
       // Declare the class Driver for SQLServer DB
       // This is necessary with Java 5 (or older)
       // Java6 (or newer) automatically find the appropriate driver.
       // If you use Java> 5, then this line is not needed.        
       Class.forName("net.sourceforge.jtds.jdbc.Driver");
 
       // Example:
       // jdbc:jtds:sqlserver://localhost:1433/simplehr;instance=SQLEXPRESS
       String connectionURL = "jdbc:jtds:sqlserver://" + hostName + ":1433/"
               + database + ";instance=" + sqlInstanceName;
 
       Connection conn = DriverManager.getConnection(connectionURL, userName,
               password);
       return conn;
   }
 
}

package com.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class SQLServerConnUtils_SQLJDBC {
 
   // Connect to SQLServer
   // (Using JDBC Driver: SQLJDBC)
   public static Connection getSQLServerConnection()
           throws SQLException, ClassNotFoundException {
       String hostName = "localhost";
       String sqlInstanceName = "SQLEXPRESS";
       String database = "simplehr";
       String userName = "sa";
       String password = "1234";
 
       return getSQLServerConnection(hostName, sqlInstanceName,
               database, userName, password);
   }
 
   //
   // Connect to SQLServer & using SQLJDBC Library.
   public static Connection getSQLServerConnection(String hostName,
           String sqlInstanceName, String database, String userName,
           String password) throws ClassNotFoundException, SQLException {
        
       // Declare the class Driver for SQLServer DB
       // This is necessary with Java 5 (or older)
       // Java6 (or newer) automatically find the appropriate driver.
       // If you use Java> 5, then this line is not needed.        
       Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
 
 
       // jdbc:sqlserver://ServerIp:1433/SQLEXPRESS;databaseName=simplehr
       String connectionURL = "jdbc:sqlserver://" + hostName + ":1433"
               + ";instance=" + sqlInstanceName + ";databaseName=" + database;
 
       Connection conn = DriverManager.getConnection(connectionURL, userName,
               password);
       return conn;
   }
 
}

package com.wikitechy.tutorial.jdbc;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class ODBCConnUtils {
 
    // Connect to ODBC Data Source named "simplehr-ds".
    public static Connection getJdbcOdbcConnection() throws SQLException,
            ClassNotFoundException {
        String odbcDataSourceName = "simplehr-ds";
        String userName = "simplehr";
        String password = "simplehr";
        return getJdbcOdbcConnection(odbcDataSourceName, userName, password);
    }
 
    public static Connection getJdbcOdbcConnection(String odbcDataSourceName,
            String userName, String password) throws SQLException,
            ClassNotFoundException {
  
        // Declare the class Driver for JDBC-ODBC Bridge
        // This is necessary with Java 5 (or older)
        // Java6 (or newer) automatically find the appropriate driver.
        // If you use Java> 5, then this line is not needed.        
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
 
        String connectionURL = "jdbc:odbc:" + odbcDataSourceName;
 
        Connection conn = DriverManager.getConnection(connectionURL, userName,
                password);
        return conn;
    }
}