我用SERVLET得到JSP页面中输入的日期值，我想判断后一个完成时间是否大于前一个开始时间，怎么办？

转换成Class Calendar

Class Calendar有before after方法，很方便的。

可察看javadoc

java中string都可以直接判断大小的。

用javascript控制
JSP中当表单提交的时候用 
onSubmit="return FrontPage_Form1_Validator(this)"调用javascript!
SY=开始年  SM=开始月  SD=开始日
EY=结束年  EM=结束月  ED=结束日


  function checkDateMin(Sy,Sm,Sd,Ey,Em,Ed)
    {
       if(parseInt(Sy)==parseInt(Ey))
           {
               if(parseInt(Sm)>parseInt(Em))
                    {
                         return 0;
                    }
               else if(parseInt(Sm)==parseInt(Em))
                    {
                         if(parseInt(Sd)>=parseInt(Ed))
                               {
                                    return 0;
                               }
                                    else
                               {
                                    return 1;
                               }
                    }
                       else
                    {
                        return 1;
                    }
                    }
                    else if(parseInt(Sy)>parseInt(Ey))
                    {
                            return 0;
                    }
                    else
                    {
                            return 1;
                    }
  }

  function FrontPage_Form1_Validator(theForm)
     {
                     }
              if (theForm.warnday.value != "" ){

                Sy=theForm.startyear.value;
                Sm=theForm.startmonth.value;
                Sd=theForm.startday.value;
                Ny=theForm.warnyear.value;
                Nm=theForm.warnmonth.value;
                Nd=theForm.warnday.value;
                checkDate=checkDateMin(Sy,Sm,Sd,Ny,Nm,Nd);
                if(checkDate==0){
                  alert('项目开始时间必须在完成时间之前！');
                  return false
                }
              }
              
        return(true);
   }

Element start = config.getChild("start-time");
      Element end = config.getChild("end-time");

      String[] starttime = start.getText().split(":");
      String[] endtime = end.getText().split(":");
      
      Calendar now = Calendar.getInstance();
      now.setTime(new Date());
      Calendar startdate = Calendar.getInstance();
      startdate.setTime(new Date());
      startdate.set(Calendar.HOUR,Integer.valueOf(starttime[0]).intValue());
      startdate.set(Calendar.MINUTE,Integer.valueOf(starttime[1]).intValue());
      Calendar enddate = Calendar.getInstance();
      enddate.setTime(new Date());
      enddate.set(Calendar.HOUR,Integer.valueOf(endtime[0]).intValue());
      enddate.set(Calendar.MINUTE,Integer.valueOf(endtime[1]).intValue());


我昨天晚上看着javadoc写的
我的start-time格式是11:45
做得比较蠢，希望高人指点，谢谢！