java获取当前日期一个月后的日期

    public String nextMonth(){
		Date date = new Date();
		int year=(new SimpleDateFormat("yyyy").format(date));//取到年份值
		int month=(new SimpleDateFormat("MM").format(date))+1;//取到鱼粉值
		int day=(new SimpleDateFormat("dd").format(date));//取到天值
		if(month==0){
			year-=1;month=12;
		}
		else if(day>28){
			if(month==2){
				if(year%400==0||(year %4==0&&year%100!=0)){
					day=29;
				}else day=28;
			}else if((month==4||month==6||month==9||month==11)&&day==31)
			{
				day=30;
			}
		}
		String y = year+"";String m ="";String d ="";
		if(month<10) m = "0"+month;
		else m=month+"";
		if(day<10) d = "0"+day;
		else d = day+"";
		(y+"-"+m+"-"+d);
		return y+"-"+m+"-"+d;
	}