import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
java.lang.Math;
int result = 0; SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar c1 = Calendar.getInstance(); Calendar c2 = Calendar.getInstance(); //起始时间 c1.setTime(sdf.parse("2012-11-12")); //结束时间 c2.setTime(sdf.parse( "2012-12-12")); result = c2.get(Calendar.YEAR)*12 - c1.get(Calendar.YEAR) *12; result = c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH) + result; int day = c2.get(Calendar.DAY_OF_MONTH) - c1.get(Calendar.DAY_OF_MONTH); result = result + (day >= 0 ? 0 : -1); return result;