应用场景：SQL调用时间，接口调用时间
LocalDateTime one = LocalDateTime.now();
LocalDateTime two = LocalDateTime.now();
LocalDateTime three = LocalDateTime.now();
LocalDateTime fore = LocalDateTime.now();
Long oneTwo = Duration.between(one,two).toMillis();
Long twoThree = Duration.between(two,three).toMillis();
Long threeFore = Duration.between(three,fore).toMillis();