Java获取2个日期里面的所有月份-白红宇

Java获取2个日期里面的所有月份

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发布时间：2019-06-09

本文共 2578 字，大约阅读时间需要 8 分钟。

　　public static void main(String[] args) {                String t1="2018-08-01";        t1 = t1.replaceAll("(\\d{4})\\-(\\d{2})\\-\\d{2}", "$1-$2-01");        //String t2="2024-11-30";            //String t2="2018-01-30";        //String t2="2019-09-30";        String t2 = "2019-09-31";        t2 = t2.replaceAll("(\\d{4})\\-(\\d{2})\\-\\d{2}", "$1-$2-01");        List
     
       monthArea = getMonthArea(t1,t2);                for(String t : monthArea) {            System.out.println(t);        }            }    private static List
      
        getMonthArea(String t1,String t2) {                LocalDate startDate = LocalDate.parse(t1);        LocalDate endDate = LocalDate.parse(t2);                List
       
         monthArea = new ArrayList<>();                if (startDate.compareTo(endDate)>0) {            return monthArea;                }                int startYear = startDate.getYear();        int startMonth = startDate.getMonthValue();                int endYear = endDate.getYear();        int endMonth = endDate.getMonthValue();                        if (startYear==endYear) {            for(int i=startMonth;i<=endMonth;i++) {                                monthArea.add(startYear+"-"+getMyMonth(i));            }                        }else {                    for(int i=startYear;i<=endYear;i++) {                if (i == startYear ) {                    calcStartYear(monthArea,startYear,startMonth);                                }else if (i == endYear){                    calcEndYear(monthArea,endYear,endMonth);                }else {                    calcOneYear(monthArea,i);                }            }                    }                return monthArea;            }    private static void calcStartYear(List
        
          monthArea,int startYear,int startMonth) {        for(int i=startMonth;i<=12;i++) {                            monthArea.add(startYear+"-"+getMyMonth(i));                    }    }    private static void calcOneYear(List
         
           monthArea,int year) {        for(int i=1;i<=12;i++) {            monthArea.add(year+"-"+getMyMonth(i));         }            }    private static void calcEndYear(List
          
            monthArea,int endYear,int endMonth) { for(int i=1;i<=endMonth;i++) { monthArea.add(endYear+"-"+getMyMonth(i)); } } private static String getMyMonth(int month){ String result = ""; if (month<10) { result = "0" + Integer.toString(month); }else { result = Integer.toString(month); } return result; }