用什么方法得到今天是星期几？

Question

Date curDate =new Date();
int i=curDate.getDay();
0是星期日，1-6分别是星期一-六

Answer 1

java.util 
Class GregorianCalendar
java.lang.Object
  |
  +--java.util.Calendar
        |
        +--java.util.GregorianCalendar
All Implemented Interfaces: 
Cloneable, Serializable 
Example:  // get the supported ids for GMT-08:00 (Pacific Standard Time)
 String[] ids = TimeZone.getAvailableIDs(-8 * 60 * 60 * 1000);
 // if no ids were returned, something is wrong. get out.
 if (ids.length == 0)
     System.exit(0);  // begin output
 System.out.println("Current Time"); // create a Pacific Standard Time time zone
 SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids[0]); // set up rules for daylight savings time
 pdt.setStartRule(Calendar.APRIL, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000);
 pdt.setEndRule(Calendar.OCTOBER, -1, Calendar.SUNDAY, 2 * 60 * 60 * 1000); // create a GregorianCalendar with the Pacific Daylight time zone
 // and the current date and time
 Calendar calendar = new GregorianCalendar(pdt);
 Date trialTime = new Date();
 calendar.setTime(trialTime); // print out a bunch of interesting things
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
                    + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
 System.out.println("DST_OFFSET: "
                    + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); System.out.println("Current Time, with hour reset to 3");
 calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
 calendar.set(Calendar.HOUR, 3);
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
        + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
 System.out.println("DST_OFFSET: "
        + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours
 

Answer 2

Date curDate =new Date();
int i=curDate.getDay();
0是星期日，1-6分别是星期一-六
????上面这个我用怎么不好使啊？？？难道还需要下面这个引用么？？？
java.util.Date.getDay();
我已经引用了<%@ page import="java.util.*"%>不知道这样和上面的是不是没什么区别啊？？
下边这个脚本，我打包为class文件的时候出现了48个错误，不知道什么原因啊？？
java.util 
Class GregorianCalendar
java.lang.Object
  |
  +--java.util.Calendar
        |
        +--java.util.GregorianCalendar
All Implemented Interfaces: 
Cloneable, Serializable 
Example:  // get the supported ids for GMT-08:00 (Pacific Standard Time)
 String[] ids = TimeZone.getAvailableIDs(-8 * 60 * 60 * 1000);
 // if no ids were returned, something is wrong. get out.
 if (ids.length == 0)
     System.exit(0);  // begin output
 System.out.println("Current Time"); // create a Pacific Standard Time time zone
 SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids[0]); // set up rules for daylight savings time
 pdt.setStartRule(Calendar.APRIL, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000);
 pdt.setEndRule(Calendar.OCTOBER, -1, Calendar.SUNDAY, 2 * 60 * 60 * 1000); // create a GregorianCalendar with the Pacific Daylight time zone
 // and the current date and time
 Calendar calendar = new GregorianCalendar(pdt);
 Date trialTime = new Date();
 calendar.setTime(trialTime); // print out a bunch of interesting things
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
                    + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
 System.out.println("DST_OFFSET: "
                    + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); System.out.println("Current Time, with hour reset to 3");
 calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
 calendar.set(Calendar.HOUR, 3);
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
        + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
 System.out.println("DST_OFFSET: "
        + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours

Answer 3

请各位高手帮忙说清楚一点，一步一步的，俺才接触jsp,好晕啊~~呵呵

Answer 4

date.jsp
<td align="right">
<font color="Red"><jsp:getProperty name="clock" property="year"/></font>年
    <font color="Red"><jsp:getProperty name="clock" property="month"/></font>月
<font color="Red"><jsp:getProperty name="clock" property="dayOfMonth"/></font>日
星期<font color="Blue"><b><jsp:getProperty name="clock" property="day"/></b></font>&nbsp;&nbsp;
</td>
<td>当前时间为   <jsp:getProperty name="clock" property="time"/>
</td>
<td>今天是今年的第<jsp:getProperty name="clock" property="dayOfYear"/>天
</td>
<td>本周是今年的第<jsp:getProperty name="clock" property="weekOfYear"/>周
</td>
<td>本周是本月的第<jsp:getProperty name="clock" property="weekOfMonth"/>周
</td>
 
java程序package dates;import java.text.DateFormat;
import java.util.*;public class JspCalendar {
    Calendar  calendar = null;    public JspCalendar() {
calendar = Calendar.getInstance();
Date trialTime = new Date();
calendar.setTime(trialTime);
    }    public int getYear() {
return calendar.get(Calendar.YEAR);
    }
    
    public String getMonth() {
int m = getMonthInt();
String[] months = new String [] { "1", "2", "3",
"4", "5", "6",
"7", "8", "9",
"10", "11", "12" };
if (m > 12)
    return "Unknown to Man";

return months[m - 1];    }    public String getDay() {
int x = getDayOfWeek();
String[] days = new String[] {"1", "2", "3", 
      "4", "5", "6","7"}; if (x > 7)
    return "Unknown to Man"; return days[x - 1];    }
    
    public int getMonthInt() {
return 1 + calendar.get(Calendar.MONTH);
    }    public String getDate() {
return getMonthInt() + "/" + getDayOfMonth() + "/" +  getYear();    }    public String getTime() {
return getHour() + ":" + getMinute() + ":" + getSecond();
    }    public int getDayOfMonth() {
return calendar.get(Calendar.DAY_OF_MONTH);
    }    public int getDayOfYear() {
return calendar.get(Calendar.DAY_OF_YEAR);
    }    public int getWeekOfYear() {
return calendar.get(Calendar.WEEK_OF_YEAR);
    }    public int getWeekOfMonth() {
return calendar.get(Calendar.WEEK_OF_MONTH);
    }    public int getDayOfWeek() {
return calendar.get(Calendar.DAY_OF_WEEK)-1;
    }
     
    public int getHour() {
return calendar.get(Calendar.HOUR_OF_DAY);
    }
    
    public int getMinute() {
return calendar.get(Calendar.MINUTE);
    }
    public int getSecond() {
return calendar.get(Calendar.SECOND);
    }    public static void main(String args[]) {
JspCalendar db = new JspCalendar();
p("date: " + db.getDayOfMonth());
p("year: " + db.getYear());
p("month: " + db.getMonth());
p("time: " + db.getTime());
p("date: " + db.getDate());
p("Day: " + db.getDay());
p("DayOfYear: " + db.getDayOfYear());
p("WeekOfYear: " + db.getWeekOfYear());
p("era: " + db.getEra());
p("ampm: " + db.getAMPM());
p("DST: " + db.getDSTOffset());
p("ZONE Offset: " + db.getZoneOffset());
p("TIMEZONE: " + db.getUSTimeZone());
    }    private static void p(String x) {
System.out.println(x);
    }
    public int getEra() {
return calendar.get(Calendar.ERA);
    }    public String getUSTimeZone() {
String[] zones = new String[] {"Hawaii", "Alaskan", "Pacific",
       "Mountain", "Central", "Eastern"};

return zones[10 + getZoneOffset()];
    }    public int getZoneOffset() {
return calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000);
    }
    public int getDSTOffset() {
return calendar.get(Calendar.DST_OFFSET)/(60*60*1000);
    }    
    public int getAMPM() {
return calendar.get(Calendar.AM_PM);
    }
}其它的jsp程序就可以调用了
用语句
<%@ include file="date.jsp"%>

Answer 5

//当前时间
   Calendar cal  = Calendar.getInstance();
   SimpleDateFormat formatter = new SimpleDateFormat("E");
   String mDateTime=formatter.format(cal.getTime());
   out.println(mDateTime);
   out.println("<br>");

Answer 6

<%@ page contentType="text/html;charset=gb2312" import="java.util.*,java.text.*,java.sql.*"%>
<%
GregorianCalendar today = new GregorianCalendar();
today.set(Calendar.YEAR, d1);
today.set(Calendar.MONTH, d2);
today.set(Calendar.DATE, d3);
int weeknum= today.get(Calendar.DAY_OF_WEEK)-1;//该天星期几
out.println(weeknum);
%>

Answer 7

<%@ page import="java.util.*"%>
<%@ page contentType="text/html;charset=gbk"%>
<%
Date aaa=new Date();
int s=aaa.getDay();
//out.println(s);
switch(s){
case 1:out.println("星期一");break;
case 2:out.println("星期二");break;
case 3:out.println("星期三");break;
case 4:out.println("星期四");break;
case 5:out.println("星期五");break;
case 6:out.println("星期六");break;
case 0:out.println("星期日");break;}
%>

Answer 8

不用这么麻烦吧，java.text.SimpleDateFormat类就可以处理各种格式的日期时间形式：
Letter  Date or Time Component  Presentation  Examples  
--------------------------------------------------------
G  Era designator  Text  AD  
y  Year  Year  1996; 96  
M  Month in year  Month  July; Jul; 07  
w  Week in year  Number  27  
W  Week in month  Number  2  
D  Day in year  Number  189  
d  Day in month  Number  10  
F  Day of week in month  Number  2  
E  Day in week  Text  Tuesday; Tue  
a  Am/pm er  Text  PM  
H  Hour in day (0-23)  Number  0  
k  Hour in day (1-24)  Number  24  
K  Hour in am/pm (0-11)  Number  0  
h  Hour in am/pm (1-12)  Number  12  
m  Minute in hour  Number  30  
s  Second in minute  Number  55  
S  Millisecond  Number  978  
z  Time zone  General time zone  Pacific Standard Time; PST; GMT-08:00  
Z  Time zone  RFC 822 time zone  -0800  从上面的表里面可以看出，如果想要星期，可以使用“E”，正如上面heshui老兄的做法：
<%@ page contentType="text/html;charset=GBK"%>
<%
SimpleDateFormat formater = new SimpleDateFormat("EEE");
Date day = new Date();
String today = formater.format(day);
out.println(today);
%>
这么得出的是中文的星期几！

Answer 9

谢谢~~我还没弄明白，问一下，我是想实现这个功能
Date curDate =new Date();
int i=curDate.getDay();
0是星期日，1-6分别是星期一-六
不知道怎么在jsp里实现~~

Answer 10

<%
Date curDate =new Date();
int i=curDate.getDay();
if (i=0){
%>
<b>星期天</b>
<%else{
%>
<b>星期
<%=i %></b>
<%}
%>

Answer 11

到目前为止~我只用duanshuy回的帖子里面好使，其它的都用不了啊~~不知道什么原因~~还有就是duanshuy的回复里面我只能用你后面的的java脚本~~其它的还是出错啊~~我把你哪个问件的package dates;去掉了，然后直接在web-inf生成JspCalendar.class文件，可是到jsp里面引用<jsp:useBean id="zz" class="JspCalendar" scope="page"/>确出现错误~~不知道什么原因~~本来想写成这个样子：
<jsp:useBean id="zz" class="JspCalendar" scope="page"/>
 <%
//Date i = zz.getDay();%>
错误不断~~请各位代表帮忙~~~~：）不明白~~

Answer 12

getDay 方法
返回 Date 对象中用本地时间表示的一周中的日期值。 dateObj.getDay()必选项 dateObj 参数为 Date 对象。说明
要获取用全球标准时间 (UTC)表示的一周中日期值，请使用 getUTCDay 方法。getDay 方法所返回的值是一个处于 0 到 6 之间的整数，它代表了一周中的某一天，返回值与一周中日期的对应关系如下： 值 星期 
0 星期天 
1 星期一 
2 星期二 
3 星期三 
4 星期四 
5 星期五 
6 星期六 
下面这个例子说明了 getDay 方法的用法。 function DateDemo(){
   var d, day, x, s = "今天是: ";
   var x = new Array("星期日", "星期一", "星期二");
   var x = x.concat("星期三","星期四", "星期五");
   var x = x.concat("星期六");
   d = new Date();
   day = d.getDay();
   return(s += x[day]);
}