往数据库存date数据

Dataformat  form1 = new SimpleDateFormat("yyyy-MM-dd");
String birday = req.getParameter("birthday");
Date date = form1.parse(birday);

　　把String类型的改成date类型

 Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        System.out.println(sdf.format(date));
        sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println(sdf.format(date));
        sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
        System.out.println(sdf.format(date));

　　把date转成String