oracle:jdbc:oracle:thin:@128.0.46.22:1521:orcl.这个我是用hibernate配置的
sqlservel:jdbc:sqlserver://localhost:1433;database=db_qqzone
mysql:jdbc:mysql://localhost:3306/stums

public class DBManager {
      private final static String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
      private final static String URL="jdbc:sqlserver://localhost:1433;database=db_qqzone";
      private final static String USERNAME="sa";
      private final static String PWD="admin123";
      static{
            try {
                  Class.forName(DRIVER);
            } catch (ClassNotFoundException e) {
                  e.printStackTrace();
            }
      }
      public static Connection getconn(){
            Connection conn = null;
            try {
                  conn = DriverManager.getConnection(URL,USERNAME,PWD);
            } catch (SQLException e) {
                  e.printStackTrace();
            }
            return conn;
      }
      public static void close(ResultSet rs,Statement st,Connection conn){
            try {
                  if(rs!=null){
                        rs.close();
                  }
                  if(st!=null){
                        st.close();
                  }
                  if(conn!=null){
                        conn.close();
                  }
            } catch (SQLException e) {
                  e.printStackTrace();
            }
      }
}