比较两个时间

输出两个时间以及两个时间相差的月份

	public  void getYMArray(){
		Calendar c1 = Calendar.getInstance();
		Calendar c2 = Calendar.getInstance();
		c1.setTime(changStringToDate("2016-12-01"));
		c2.setTime(changStringToDate("2018-01-01"));
		Integer beginYear = c1.get(Calendar.YEAR);
		Integer beginMonth = c1.get(Calendar.MONTH)+1;
		Integer endYear = c2.get(Calendar.YEAR);
		Integer endMonth = c2.get(Calendar.MONTH)+1;
		Integer difMonth = (endYear - beginYear) * 12 + endMonth - beginMonth;
		if(difMonth>1){
			String[] dateYM=new String[1+difMonth];
			Integer startmonth=1;
			for(int i=0;i<=difMonth;i++){
				 startmonth=startmonth+beginMonth;
				if(startmonth<=12){
					if(startmonth<10){
						dateYM[i]=beginYear.toString()+"0"+startmonth.toString();
					}else{
						dateYM[i]=beginYear.toString()+startmonth.toString();
					}
				}else{
					beginYear=beginYear+1;
					if(beginMonth<10){
						dateYM[i]=beginYear.toString()+"0"+beginMonth.toString();
					}else{
						dateYM[i]=beginYear.toString()+beginMonth.toString();
					}
					beginMonth=1;
					startmonth=0;
				}
			}
			System.out.println(dateYM);
			
		}else if(difMonth==1){
			String[] dateYM=new String[2];
			dateYM[0]=beginYear.toString()+beginMonth.toString();
			dateYM[1]=endMonth.toString()+endMonth.toString();
			System.out.println(dateYM);
			
		}
		
	} 

 判断两个时间是否在同一个月

public  void compareToTwoDate(){
		String start="2016-01";
		String end="2016-02";
		if(start.split("-")[0].equals(end.split("-")[0])){
			if(start.split("-")[1].equals(end.split("-")[1])){
				System.out.println("true");
			}else{
				System.out.println("false");
			}
		}else{
			System.out.println("false");
		}
	}