程式碼：

import java.sql.*;
public class JDBCUtil {
    private static final String DBDRIVERSQLSWRVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";// sqlserver驅動類類名
private static final String DBDRIVERORACLE = "oracle.jdbc.driver.OracleDriver";// oracle驅動類類名
private static final String DBNAME = "xxxx";// 資料庫名
 
private static final String DBUSER = "xxxx";// 資料庫使用者名稱private static final String DBPASSWORD = "xxxxx";// 資料庫密碼
private static final String DBURL = "jdbc:sqlserver://IP:prot;DatabaseName="+DBNAME;// 連線URL
private static final String DBUSERORCL = "xxxx";// oracle資料庫使用者名稱
private static final String DBPASSWORDORCL 
 
= "xxxx";// oracle資料庫密碼
private static final String DBURLORCL = "jdbc:oracle:thin:@IP:prot:資料庫名";// oracle連線URL
private static Connection conn = null;

    private static PreparedStatement ps = null;

    private static ResultSet rs = null;
    /*
        * 獲取資料庫連線
        */
public static Connection getConnection() {

        try 
 
{

            Class.forName(DBDRIVERSQLSWRVER);// 註冊驅動
System.out.println("成功載入SQL Server驅動程式");
            conn = DriverManager.getConnection(DBURL,DBUSER,
                    DBPASSWORD);// 獲得連線物件
System.out.println("資料庫連線成功");
        } catch (ClassNotFoundException e) {// 捕獲驅動類無法找到異常
System.out.println("找不到SQL Server驅動程式");
            System.out.println(e.toString());
            e.printStackTrace();

        } catch (SQLException e) {// 捕獲SQL異常
e.printStackTrace();
        }

        return conn;
    }

    public static Connection getConnectionOracle() {

        try {

            Class.forName(DBDRIVERORACLE);// 註冊驅動
System.out.println("成功載入SQL Server驅動程式");
            conn = DriverManager.getConnection(DBURLORCL,DBUSERORCL,
                    DBPASSWORDORCL);// 獲得連線物件
System.out.println("資料庫連線成功");
        } catch (ClassNotFoundException e) {// 捕獲驅動類無法找到異常
System.out.println("找不到oracle驅動程式");
            System.out.println(e.toString());
            e.printStackTrace();

        } catch (SQLException e) {// 捕獲SQL異常
e.printStackTrace();
        }

        return conn;
    }

    public static void closeAll(Connection conn, Statement stmt,PreparedStatement pstmt, ResultSet rs) {
       try {
           if (rs != null) {
               rs.close();
           }
           if (pstmt != null) {
               pstmt.close();
           }
           if (stmt != null) {
               stmt.close();
           }
           if (conn != null) {
               conn.close();
           }
           System.out.print("關閉成功");
       }catch (SQLException e){
           System.out.print("關閉失敗");
       }
    }

    public static final void main(String[] args) throws SQLException {
        Connection conn = getConnection();
        conn.close();
    }
}