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  Tutorial: Connecting to the Database Using JDBC and Pure Java driver

Connecting to the Database Using JDBC and Pure Java driver Connecting to the Database JDBC Driver In our search engine we are using MySQL database server and MM.MySQL Driver for connecting our application to the database. MM.MySQL Driver is

Tutorial Details:

available at http://www.worldserver.com/mm/mysql . As stated earlier MM.MySQL Driver is 100% pure Java Driver for MySQL and is distributed under the GNUGLP. Developers can use this driver to make connections to MySQL server from both Java Applications and Applets. MM.MySQL Driver provide all the JDBC features. It automatically re-connect if connection is failed. It also provide Unicode support and support for varied character encoding.
Connecting to the Database
All the classes and interfaces of JDBC API are defined in java.sql package, so it is necessary to import java.sql.* package in our application.
In this search engine our application communicate with database using JDBC and for making connection we are using MM.MySQL JDBC Driver.
First of all we obtain a Connection object that represents the network connection to the database. Driver Manager plays very important role of establishing connection. Class.forName("org.git.mm.mysql.Driver").newInstance() tells the Driver Manager to use MM.MySQL JDBC Driver. To obtain a connection to the Database getConnection() method of DriverManager class is used, which provides database connectivity to our search engine.
import java.io.*;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.net.*;
import java.util.*;
public class search extends HttpServlet{
//Connection object
Connection theConnection;
private String dbURL = "jdbc:mysql://10.0.0.1/javadevelopers?user=username&password=password";
//private String servletURL="/servlet";
private String servletURL="http://www.webappcabaret.com/javadevelopers";
//private String image="/images/open.gif";
private String image="http://www.roseindia.net/images/open.gif";
public void init() throws ServletException{
makeConnection();
}
public void makeConnection(){
//System.out.println("Opening db connection");
try{
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
theConnection = DriverManager.getConnection(dbURL);
}
catch (Exception e)
{
// System.out.println(e.getMessage());
}
// System.out.println("Connected to the database");
}
public void destory(){
try{
theConnection.close();
}catch(Exception e){}
}
The close() method of Connection object closes the database connection.


 

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