Java获取2个日期里面的所有月份

　　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<String> monthArea = getMonthArea(t1,t2);
        
        for(String t : monthArea) {
            System.out.println(t);
        }
        
    }
    private static List<String> getMonthArea(String t1,String t2) {
        
        LocalDate startDate = LocalDate.parse(t1);
        LocalDate endDate = LocalDate.parse(t2);
        
        List<String> 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<String> monthArea,int startYear,int startMonth) {
        for(int i=startMonth;i<=12;i++) {                
            monthArea.add(startYear+"-"+getMyMonth(i));            
        }
    }
    private static void calcOneYear(List<String> monthArea,int year) {
        for(int i=1;i<=12;i++) {
            monthArea.add(year+"-"+getMyMonth(i)); 
        }        
    }
    private static void calcEndYear(List<String> 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;
    }