用于Java 8 LocalDateTime的周末过滤器 [英] Weekend filter for Java 8 LocalDateTime

问题描述

我想写一个布尔值函数，如果给定的 LocalDateTime 落在两个特定的时间点之间，返回true，否则返回false。

具体而言，如果给定日期是格林威治标准时间周五晚上22点至格林尼治标准时间周日晚上23点之间，我想要一个 LocalDateTime 过滤器。

一个框架可能如下所示：

  public boolean isWeekend（LocalDateTime dateTime）{ 
 //检查dateTime是否在星期五22:00 GMT和星期天23:00 GMT 
 // return ...之间？ 
 
 
 
 $ b $ p 
 $ b 
这基本上是一个周末过滤器，我想知道是否有一个简单的解决方案与新的Java 8时间库（或任何其他现有的过滤器方法）。
 
 
我知道如何检查星期几，小时等，但避免重新发明轮子。
 
解决方案
 我已经写了一个小程序来实现这个功能 
 
 
公共类TestWeekend {
 private static final int FRIDAY = 5; $ {
 
 $ b pre $ 
 private static final int SATURDAY = 6; 
 private static final int SUNDAY = 7; 
 private static final Integer WEEKEND_START_FRIDAY_CUT_OFF_HOUR = 22; 
 private static final Integer WEEKEND_END_SUNDAY_CUT_OFF_HOUR = 23; 
 private static List< Integer> weekendDaysList = Arrays.asList（FRIDAY，SATURDAY，SUNDAY）; 
 
 public static void main（String [] args）抛出FileNotFoundException {
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,22,18 ，39）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,22,21,59）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,22,22,0）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,23,5,0）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,24,8,0）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,24,22,59）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,24,23,0）））; 
 System.out.println（is weekend  - + isWeekend（LocalDateTime.of（2016,4,25,11,5）））; 
 
 
 public static boolean isWeekend（LocalDateTime dateTime）{
 System.out.print（Date  - + dateTime +，）; 
 if（SATDDAY == dateTime.getDayOfWeek（）。getValue（））{
 return true; 
 if（weekendDaysList.contains（dateTime.getDayOfWeek（）。getValue（））） （FRIDAY == dateTime.getDayOfWeek（）。getValue（）&& dateTime.getHour（）> = WEEKEND_START_FRIDAY_CUT_OFF_HOUR）{
 return true; 
 
 if 
} else if（SUNDAY == dateTime.getDayOfWeek（）。getValue（）&& dateTime.getHour（）< WEEKEND_END_SUNDAY_CUT_OFF_HOUR）{
 return true; 
 
 
 //检查dateTime是否在星期五22:00和星期日23:00 GMT之间。
 return false; 
} 
 
} 
  

I want to write a boolean valued function which returns true if the given LocalDateTime falls between two specific points in time, false otherwise.

Specifically I want to have a LocalDateTime filter if a given date is between 22:00 GMT Friday and 23:00 GMT Sunday.

A skeleton could look like this:

public boolean isWeekend(LocalDateTime dateTime) {
    //Checks if dateTime falls in between Friday's 22:00 GMT and Sunday's 23:00 GMT
    //return ...???
}

This is basically a weekend filter and I'm wondering if there is a simple solution with the new Java 8 Time library(or any other existing filter methods).

I know how check for day of week, hour etc. but avoid to reinvent the wheel.

解决方案

I have written a small program to achieve this

PROGRAM

public class TestWeekend {
    private static final int FRIDAY = 5;
    private static final int SATURDAY = 6;
    private static final int SUNDAY = 7;
    private static final Integer WEEKEND_START_FRIDAY_CUT_OFF_HOUR = 22;
    private static final Integer WEEKEND_END_SUNDAY_CUT_OFF_HOUR = 23;
    private static List<Integer> weekendDaysList = Arrays.asList(FRIDAY, SATURDAY, SUNDAY);

    public static void main(String []args) throws FileNotFoundException {
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,22,18,39)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,22,21,59)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,22,22,0)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,23,5,0)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,24,8,0)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,24,22,59)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,24,23,0)));
        System.out.println(" is weekend - "+isWeekend(LocalDateTime.of(2016,4,25,11,5)));
    }

    public static  boolean isWeekend(LocalDateTime dateTime) {
        System.out.print("Date - "+dateTime+" , ");
        if(weekendDaysList.contains(dateTime.getDayOfWeek().getValue()) ){
            if(SATURDAY ==  dateTime.getDayOfWeek().getValue()){
                return true;
            }
            if(FRIDAY == dateTime.getDayOfWeek().getValue() && dateTime.getHour() >=WEEKEND_START_FRIDAY_CUT_OFF_HOUR){
               return true;
            }else if(SUNDAY == dateTime.getDayOfWeek().getValue() && dateTime.getHour()  < WEEKEND_END_SUNDAY_CUT_OFF_HOUR ){
                return   true;
            }
        }
        //Checks if dateTime falls in between Friday's 22:00 GMT and Sunday's 23:00 GMT
         return false;
    }

 }

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