import java.sql.*;

public class OracleDB {

    public static Connection getConnection() {
        Connection conn = null;
        try {
            String driver = "oracle.jdbc.OracleDriver";
            String dbName = "DB_Name";
            String dbURL = "jdbc:oracle:thin:@127.0.0.1:1521:";
            String username = "username";
            String password = "password";

            Class.forName(driver).newInstance();
            conn = DriverManager.getConnection(dbURL + dbName, username,
                    password);

        } catch (SQLException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }

    public static void closeConnection(Connection conn) {
        try {
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

------解决方案--------------------

Java code

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


public class TestJDBC {

    /**
     * @param args
     */
    /**jdbc:sqlserver://localhost:1433;databaseName=bbsDB;user=Lenovo;password=123456"
     * @param args
     */
    public static void main(String[] args)  {
        Connection con=null;
        Statement stmt=null;
        ResultSet rs=null;
        try{
            //jdbc:sqlserver://localhost:1433;databaseName=bbsDB;user=Lenovo;password=123456
            //jdbc:sqlserver://localhost;user=MyUserName;password=*****;
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            con=DriverManager.getConnection("jdbc:sqlserver://localhost;user=Lenovo;password=123456");
            stmt=con.createStatement();
            rs=stmt.executeQuery("Select * from bbsUsers ");
            while(rs.next()){
                //得到内容
                
            }
        }catch(ClassNotFoundException e){
            e.printStackTrace();
        }catch(SQLException e){
            e.printStackTrace();
        }
        finally{
            try{
                if(con!=null){
                    con.close();
                    con=null;
                }
                if(stmt!=null){
                    stmt.close();
                    stmt=null;
                }
                if(rs!=null){
                    rs.close();
                    rs=null;
                }
            }catch(SQLException e){
                e.printStackTrace();
            }
        }
    }
}
把连接字符串改成oracle的连接字符串就可以了，我这个是SQL Server连接字符串