一，连接驱动

数据库的链接需要下载对应数据库的驱动jar,在连接oracle上面可以使用ojdbc6.jar 或者 ojdbc7.jar，下载地址可以访问http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html来下载对应的驱动包。

二，连接示例代码

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package com.devnp.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class OracleJDBCUtil {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Connection connection = getConnection();
		
		if(connection == null)
			System.out.println("Get Oracle JDBC Connection failed.");
		else
			System.out.println("Get Oracle JDBC Connection Success.");
	}
	
	public static Connection getConnection(){
		System.out.println("-------- Oracle JDBC Connection Testing ------");
		
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
		} catch (ClassNotFoundException e) {
			System.out.println("Load Oracle JDBC Driver has Error.");
			
			e.printStackTrace();
		}
		
		Connection connection = null;
		
		try {

            connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "system", "password");

        } catch (SQLException e) {

            System.out.println("Connection Failed!");
            
            e.printStackTrace();

        }
		
		return connection ;
	}
	
}
测试用例：
 D:\Person-Test>javac OracleJDBCUtil.java

D:\Person-Test>java -cp D:\Person-Test\ojdbc7.jar;D:\Person-Test OracleJDBCUtil
 -------- Oracle JDBC Connection Testing ------------
 Get Oracle JDBC Connection Success.