一个时间的问题（高手接分）

Question

Calendar d1=Calendar.getInstance().setTime(rs1.getDate(1));
int y1=d1.get(Calendar.YEAR);
int day1=d1.get(Calendar.DAY_OF_YEAR);
Calendar d2=Calendar.getInstance().setTime(rs1.getDate(1));
int y2=d2.get(Calendar.YEAR);
int day2=d2.get(Calendar.DAY_OF_YEAR);if(y1==y2&&day2-day1==3)
   doSomething();

Answer 1

Date updateTime = rs1.getDate(1);
Date completeTime = rs.getDate(1);
java.util.Calendar ca1 = java.util.Calendar.getInstance();
java.util.Calendar ca2 = java.util.Calendar.getInstance();
ca1.setTime(updateTime);
ca2.setTime(completeTime);
ca1.add(ca1.DAY_OF_YEAR,-3);
if(ca1.before(ca2))
    System.out.println("大于3天");
else
    System.out.println("小于3天");

Answer 2

int dateCha = new Long(updateTime.getTime()/3600*24*1000 - completeTime.getTime()/3600*24*1000).intValue();

Answer 3

忘了加括号
int dateCha = new Long(updateTime.getTime()/(3600*24*1000) - completeTime.getTime()/(3600*24*1000)).intValue();