/**
* 当前日期加上指定天数后
* @param num 为增加的天数
* @return
*/
public static String plusDay(int num){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Calendar ca = Calendar.getInstance();
ca.add(Calendar.DATE, num);
return format.format(ca.getTime());
}
/**
* 给定日期加上指定天数后
* @param date
* @param day
* @return
*/
public static String addDate(Date date,long day) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long time = date.getTime();
day = day*24*60*60*1000;
time+=day;
return format.format(new Date(time));
}
@Test
public void start(){
Boolean flag = true;
Date d = new Date();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
d = format.parse("2020-02-20 10:100syut:1");
} catch (ParseException e) {
flag = false;
System.out.println("转换错误！");
}
if(flag)System.out.println(Num_test.addDate(d,5));
}