java数据库驱动 oracle mysql sqlserver oracle pointbase

try { Class.forName("oracle.jdbc.driver.OracleDriver"); Connection conn=null; ResultSet rs=null; conn=DriverManager.getConnection("jdbc:oracle:thin:@172.16.16.10:1521:tarena","openlab","open123"); Statement stmt=conn.createStatement(); rs = stmt.executeQuery("select * from s_emp"); while(rs.next()){ System.out.println(rs.getString("first_name")); System.out.println(rs.getString("last_name")); System.out.println(rs.getString("salary")); } } catch (Exception e) { e.printStackTrace(); }