LocalDate，把字符串转为日期，计算两个LocalDate之间差几天

@Test public void test(){ //格式化 LocalDate startTime = LocalDate.parse("2020-06-30"); LocalDate endTime = LocalDate.parse("2020-07-31"); Long days = startTime.until(endTime, ChronoUnit.DAYS); System.out.println(startTime+" 与 " +endTime+" 之间相差 "+days +"天"); //2020-06-30 与 2020-07-31 之间相差 31天 }