JDBC for Oracle - Herong's Tutorial Examples - v3.13, by Herong Yang
Loading JDBC Driver Class - ojdbc16.jar
This section describes how to load the Oracle JDBC driver class - ojdbc14.jar.
If you are using newer versions of JDK, it will automatically load the Oracle JDBC driver, as long as the JAR file is included in the classpath. There is no need to call Class.forName("oracle.jdbc.OracleDriver") to load the driver class explicitly.
Here is a tutorial program to show you how JDK loads the Oracle JDBC driver:
/* OracleLoadDriver.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; import java.util.*; public class OracleLoadDriver { public static void main(String [] args) { Connection con = null; try { System.out.println("Before loading OracleDriver:"); listDrivers(); // Load the Oracle JDBC driver with forName() Class.forName("oracle.jdbc.OracleDriver") ; System.out.println("After loading OracleDriver:"); listDrivers(); } catch (Exception e) { e.printStackTrace(); } } private static void listDrivers() { Enumeration driverList = DriverManager.getDrivers(); while (driverList.hasMoreElements()) { Driver driverClass = (Driver) driverList.nextElement(); System.out.println(" "+driverClass.getClass().getName()); } } }
The compilation and execution of the above program were recorded below. Notice the exception error I got without ojdbc11.jar in the classpath:
herong> javac OracleLoadDriver.java herong> java OracleLoadDriver Before loading OracleDriver: java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver ... herong> java -cp .;ojdbc11.jar OracleLoadDriver Before loading OracleDriver: oracle.jdbc.OracleDriver After loading OracleDriver: oracle.jdbc.OracleDriver
Depending what versions of JDK and Oracle server you are using, you may need use different versions of Oracle JDBC driver JAR file in the class path option, "-cp ...".
Table of Contents
JDBC (Java Database Connectivity) Introduction
Oracle Express Edition Installation on Windows
JDBC Thin Client-Side Driver Installation
►Loading JDBC Driver Class - ojdbc16.jar
Creating Connections with DataSource Class
DataSource Error - makeURL() Failed
Getting Driver and Server Information
"CREATE TABLE" - Creating New Tables
"INSERT INTO" - Inserting New Data Rows
Oracle - Reference Implementation of JdbcRowSet
Oracle - JBDC CallableStatement
Oracle CLOB (Character Large Object) - TEXT
Oracle BLOB (Binary Large Object) - BLOB