java中关于时间

<%@ page import="java.util.Date" %><%@ page import="java.text.SimpleDateFormat" %>    <%    Date date = supplierinf.sicontractdate;    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");    String str = format.format(date);    %>import java.util.Date;import java.text.SimpleDateFormat;    Date date = from.getAfmdate();    if (null != date) {      SimpleDateFormat yearFormat = new SimpleDateFormat("yyyy");      SimpleDateFormat monthFormat = new SimpleDateFormat("MM");      SimpleDateFormat dayFormat = new SimpleDateFormat("dd");      to.setAfmYear(yearFormat.format(date));      to.setAfmMonth(monthFormat.format(date));      to.setAfmDay(dayFormat.format(date));    }

    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");    appPo.setAfmdate(format.parse(appForm.getAfmYear() + "-" +                                  appForm.getAfmMonth() + "-" +                                  appForm.getAfmDay()));