import java.text.SimpleDateFormat;
import java.util.Date;public class lizi{
public static void main(String args[])
{
Date date = new Date();
int year=Integer.parseInt(new SimpleDateFormat("yyyy").format(date));
int month=Integer.parseInt(new SimpleDateFormat("MM").format(date));
int day=Integer.parseInt(new SimpleDateFormat("dd").format(date))-6;
if(day<1){
month-=1;
if(month==0){
year-=1;month=12;
}
if(month==4||month==6||month==9||month==11){
day=30+day;
}else if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
{
day=31+day;
}else if(month==2){
if(year%400==0||(year %4==0&&year%100!=0))day=29+day;
else day=28+day;
}
}
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+"";
System.out.println(y+m+d);
}
}这个是求一周前时间的代码,我想知道一周前每一天的代码怎么求?
直接调用里面的方法就行了
先写个简单例子进行测试 熟悉一下它的用法!
这里有关于星期计算的算法 楼主可以参考一下 可以用数学公式!!!
import java.text.SimpleDateFormat;
public class date {
public static void main(String[] args){
for(int i=0;i<7;i++){
String[] str={"1","2","3","4","5","6","7"};
SimpleDateFormat tempDate = new SimpleDateFormat("yyyy/MM/dd");
String weekdate=weekly.getNextDay("2011/05/29", str[i]);
System.out.println(weekdate);
}
}
}
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;public class weekly { public static Date ToDate(String sDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd");
ParsePosition pp = new ParsePosition(0);
Date date = formatter.parse(sDate, pp);
return date;
}
public static String getNextDay(String nowdate, String delay) {
try{
SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
String dates = null;
Date d = ToDate(nowdate);
long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;
d.setTime(myTime * 1000);
dates = format.format(d);
return dates;
}catch(Exception e){
return null;
}
}
public static void main(String[] args){
for(int i=0;i<7;i++){
String[] str={"1","2","3","4","5","6","7"};
String dates=weekly.getNextDay("2011/02/02", str[i]);
System.out.println(dates);
}
}
}
这个满靠谱的,只可惜没能用Calendar类