joda-time-白红宇

joda-time

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发布时间：2019-06-25

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# 最近写了一些有意思的需求，用了一些有意思的工具

* 依赖joda-time

* 需求1：任意给定时间t, 求t所在的时间点的所在小时，所在天，所在周，所在月的开始时间到结束时间的timestamp（有点绕，估计看代码更容易理解）

import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import org.joda.time.DateTime;public class QQ {    public static void main(String[] args) throws ParseException {        Long ts = 1556606641000L;        Map
     
       result1 = constructCycleTimeMap(ts, "hour");        for (Map.Entry
      
        entry : result1.entrySet()) {            System.out.println(entry.getKey() + ": " + entry.getValue());        }        Map
       
         result2 = constructCycleTimeMap(ts, "day");        for (Map.Entry
        
          entry : result2.entrySet()) {            System.out.println(entry.getKey() + ": " + entry.getValue());        }        Map
         
           result3 = constructCycleTimeMap(ts, "week");        for (Map.Entry
          
            entry : result3.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); } Map
           
             result4 = constructCycleTimeMap(ts, "month"); for (Map.Entry
            
              entry : result4.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); } } private static Map
             
               constructCycleTimeMap(Long time, String sampling) throws ParseException { Map
              
                map = new HashMap
               
                (); if (SamplingEnum.HOUR.getName().equals(sampling)) { DateTime date = new DateTime(time); Long ts = date.minuteOfHour().withMinimumValue().secondOfMinute().withMinimumValue().getMillis(); map.put("start", ts); map.put("start2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); ts = date.minuteOfHour().withMaximumValue().secondOfMinute().withMaximumValue().getMillis(); map.put("end", ts); map.put("end2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); } else if (SamplingEnum.DAY.getName().equals(sampling)) { DateTime date = new DateTime(time); Long ts = date.hourOfDay().withMinimumValue().minuteOfHour().withMinimumValue().secondOfMinute() .withMinimumValue().getMillis(); map.put("start", ts); map.put("start2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); ts = date.hourOfDay().withMaximumValue().minuteOfHour().withMaximumValue().secondOfMinute() .withMaximumValue().getMillis(); map.put("end", ts); map.put("end2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); } else if (SamplingEnum.WEEK.getName().equals(sampling)) { // 使用jode time 获取当前所在星期的星期一 DateTime date = new DateTime(time); Long ts = date.dayOfWeek().withMinimumValue().hourOfDay().withMinimumValue().minuteOfHour() .withMinimumValue().secondOfMinute().withMinimumValue().getMillis(); map.put("start", ts); map.put("start2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); // 使用jode time 获取当前所在星期的星期日 ts = date.dayOfWeek().withMaximumValue().hourOfDay().withMaximumValue().minuteOfHour().withMaximumValue() .secondOfMinute().withMaximumValue().getMillis(); map.put("end", ts); map.put("end2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); } else if (SamplingEnum.MONTH.getName().equals(sampling)) { DateTime date = new DateTime(time); Long ts = date.dayOfMonth().withMinimumValue().hourOfDay().withMinimumValue().minuteOfHour() .withMinimumValue().secondOfMinute().withMinimumValue().getMillis(); map.put("start", ts); map.put("start2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); ts = date.dayOfMonth().withMaximumValue().hourOfDay().withMaximumValue().minuteOfHour().withMaximumValue() .secondOfMinute().withMaximumValue().getMillis(); map.put("end", ts); map.put("end2", timestampToStr(ts, "yyyy-MM-dd HH:mm:ss")); } return map; } private static String timestampToStr(Long timestamp, String formatStr) { SimpleDateFormat format = new SimpleDateFormat(formatStr); Date date = new Date(timestamp); return format.format(date); } public enum SamplingEnum { HOUR("hour"), DAY("day"), WEEK("week"), MONTH("month"); private String name; private SamplingEnum(String name) { this.name = name; } public String getName() { return name; } public static Boolean contains(String sampling) { Boolean isContained = false; for (SamplingEnum item : values()) { if (item.getName().equals(sampling)) { isContained = true; } } return isContained; } public static String toStr() { StringBuilder str = new StringBuilder(); for (SamplingEnum item : values()) { str.append(item.getName() + ", "); } return str.toString(); } }}