Java中 compareTo时间比较
1 Date dat1=new Date(); 2 Date dat2=new Date();
int num = dat1.compareTo(dat2);
如果 dat1>dat2 num = 1;
dat1=dat2 num = 0;
dat1<dat2 num = -1;
1 Date dat1=new Date(); 2 Date dat2=new Date();
int num = dat1.compareTo(dat2);
如果 dat1>dat2 num = 1;
dat1=dat2 num = 0;
dat1<dat2 num = -1;