获取前一天的日期的方法

public static String getSpecifiedDayBefore(String specifiedDay){

//SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

Calendar c = Calendar.getInstance();

Date date=null;

try {

date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay);

} catch (ParseException e) {

e.printStackTrace();

}

c.setTime(date);

int day=c.get(Calendar.DATE);

c.set(Calendar.DATE,day-1);

String dayBefore=new SimpleDateFormat("yyyyMMdd").format(c.getTime());

return dayBefore;

}