java程序中sql server和oracle、mysql的连接字符串有什么不同？

链接数据库用到JDBC,一般链接数据库都要用到数据库驱动、链接字符串、登录名、登录密码。这4个属性可以提取到一个父类中，每一种数据库写一个类继承父类。要是这些都没问题了，就可以用楼上哥们儿说的，简单工厂模式，简单工厂是用到了java中的多态特性。 import java.sql.Connection; public abstract class BaseConnect { public BaseConnect(String driverClass, String url, String loginName, String password) { super(); this.driverClass = driverClass; this.url = url; this.loginName = loginName; this.password = password; } protected String driverClass; protected String url; protected String loginName; protected String password; public abstract void initDriver(); public abstract Connection getConnect(); public abstract void closeConnect(Connection conn); } import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class OraclConnect extends BaseConnect { public OraclConnect(String driverClass, String url, String loginName, String password) { super(driverClass, url, loginName, password); // TODO Auto-generated constructor stub } @Override public void initDriver() { try { Class.forName(driverClass); } catch (ClassNotFoundException e) { e.printStackTrace(); } } @Override public Connection getConnect() { try { return DriverManager.getConnection(url, loginName, password); } catch (SQLException e) { e.printStackTrace(); } return null; } @Override public void closeConnect(Connection conn) { try { if (conn != null && !conn.isClosed()) { conn.close(); } } catch (SQLException e) { e.printStackTrace(); } } } 以此类推，上面代码是我随便一写，你自己再改进下。蓝屏