/**
* 根据系统时间得到n天以后的日期
* @param int n 天数
* @return String 得到的时间 YYYYMMDD
*/
private synchronized static String getNDayLater(int n)throws Exception{
String time = null;
String dayStr = null;
String monthStr = null;
String yearStr = null;
java.util.Calendar cal = java.util.Calendar.getInstance();
cal.add(java.util.Calendar.DAY_OF_MONTH,n);
int day = cal.get(java.util.Calendar.DATE);
int month = cal.get(java.util.Calendar.MONTH)+1;
int year = cal.get(java.util.Calendar.YEAR);
if (day<10)
dayStr = "0"+Integer.toString(day);
else
dayStr = Integer.toString(day);
if (month<10)
monthStr = "0"+Integer.toString(month);
else
monthStr = Integer.toString(month);
yearStr = Integer.toString(year);
time = yearStr+monthStr+dayStr;
dayStr = null;
monthStr = null;
yearStr = null;
return time;
}略加修改,我想应该可以满足你的要求
* 根据系统时间得到n天以后的日期
* @param int n 天数
* @return String 得到的时间 YYYYMMDD
*/
private synchronized static String getNDayLater(int n)throws Exception{
String time = null;
String dayStr = null;
String monthStr = null;
String yearStr = null;
java.util.Calendar cal = java.util.Calendar.getInstance();
cal.add(java.util.Calendar.DAY_OF_MONTH,n);
int day = cal.get(java.util.Calendar.DATE);
int month = cal.get(java.util.Calendar.MONTH)+1;
int year = cal.get(java.util.Calendar.YEAR);
if (day<10)
dayStr = "0"+Integer.toString(day);
else
dayStr = Integer.toString(day);
if (month<10)
monthStr = "0"+Integer.toString(month);
else
monthStr = Integer.toString(month);
yearStr = Integer.toString(year);
time = yearStr+monthStr+dayStr;
dayStr = null;
monthStr = null;
yearStr = null;
return time;
}略加修改,我想应该可以满足你的要求
java.text.SimpleDateFormat df=new java.text.SimpleDateFormat("yyyy-MM-dd");
System.out.println("今天的日期:"+df.format(d));
System.out.println("两天前的日期:"+df.format(new java.util.Date(d.getTime()-2*24*3600*1000)));
System.out.println("三天后的日期:"+df.format(new java.util.Date(d.getTime()+3*24*3600*1000)));这个方法又如何?
java.util.Date myDate=new java.util.Date();
myDate.setTime(myDate.getTime()-60*24*60*1000);
String mDate=formatter.format(myDate);
out.println(mDate);
out.println("<br>");