二个日期相隔天数的问题，错在哪里？
public int Get_Date_Count(String startDate,String endDate,int flag)
{
SimpleDateFormat sf=new SimpleDateFormat( "yyyyMMdd ");
Date sDate = new Date();
Date eDate = new Date();

sDate = sf.parse(startDate);//Unhandled exception type ParseException
eDate=sf.parse(endDate);//Unhandled exception type ParseException

//Date sDate = sf.parse(startDate);

Calendar c = Calendar.getInstance();
c.setTime(sDate);
long ls = c.getTimeInMillis();
c.setTime(eDate);
long le = c.getTimeInMillis();

getCnt=(int) ((le-ls)/(24*3600*1000));

return getCnt;
}

[解决办法]
sDate = sf.parse(startDate);//Unhandled exception type ParseException
eDate=sf.parse(endDate);//Unhandled exception type ParseException

上面两句应该这样写
sDate = new Date(sf.parse(startDate).getTime());
eDate = new Date(sf.parse(endDate).getTime());

[解决办法]
给你稍微改了一下：
public static int Get_Date_Count(String startDate, String endDate, int flag){
SimpleDateFormat sf = new SimpleDateFormat( "yyyyMMdd ");

try{
long ls = sf.parse(startDate).getTime();
long le = sf.parse(endDate).getTime();

return (int) ((le - ls) / (24 * 3600 * 1000));
}catch(Exception e){
e.printStackTrace();
}
return -1;
}

测试结果：
System.out.println (Get_Date_Count( "20070401 ", "20070403 ",1));
输出2！不知道是不是你要的结果？