请教一个很菜的问题

我是初学jsp,对面向对象还有些弄不清楚,我这么些就出现这样的错误
The method LunarCalendar() is undefined for the type LunarCalendar
这是为什么啊?

类名是否已引用？方法是否是public的？返回类型注意一下？

程序是这样的
/*
* 文件名：LunarCalendar.java
* 创建时间：2005-3-3
* 创建者：Winter Lau
*/
package com.xs.unit;import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;/**
* 农历日历
* @author Winter Lau
*/
public class LunarCalendar { final private static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570,
0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0,
0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50,
0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,
0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0,
0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4,
0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550,
0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,
0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,
0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,
0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40,
0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3,
0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,
0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0,
0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,
0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0,
0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65,
0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0,
0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2,
0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 };
final private static int[] year20 = new int[] { 1, 4, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1 };
final private static int[] year19 = new int[] { 0, 3, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 };
final private static int[] year2000 = new int[] { 0, 3, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1 };
private final static String[] nStr1 = new String[]{"","正","二","三","四","五","六","七","八","九","十","十一","十二"}; private final static String[] Gan=new String[]{"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};
private final static String[] Zhi=new String[]{"子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"};
private final static String[] Animals=new String[]{"鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"};
private final static String[] solarTerm = new String[]{"小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"};

private final static String[] sFtv = new String[]{
"0101*元旦",
"0214 情人节",
"0308 妇女节",
"0312 植树节",
"0315 消费者权益日",
"0401 愚人节",
"0501 劳动节",
"0504 青年节",
"0512 护士节",
"0601 儿童节",
"0701 建党节",
"0801 建军节",
"0808 父亲节",
"0909 毛泽东逝世纪念",
"0910 教师节",
"0928 孔子诞辰",
"1001*国庆节",
"1006 老人节",
"1024 联合国日",
"1112 孙中山诞辰",
"1220 澳门回归",
"1225 圣诞节",
"1226 毛泽东诞辰"};
private final static String[] lFtv = new String[]{
"0101*农历春节",
"0115 元宵节",
"0505 端午节",
"0707 七夕情人节",
"0815 中秋节",
"0909 重阳节",
"1208 腊八节",
"1224 小年",
"0100*除夕"}; /**
* 传回农历 y年的总天数
* @param y
* @return
*/
final private static int lYearDays(int y){
int i, sum = 348;
for (i = 0x8000; i > 0x8; i >>= 1) {
if ((lunarInfo[y - 1900] & i) != 0)
sum += 1;
}
return (sum + leapDays(y));
} /**
* 传回农历 y年闰月的天数
* @param y
* @return
*/
final private static int leapDays(int y){
if (leapMonth(y) != 0) {
if ((lunarInfo[y - 1900] & 0x10000) != 0)
return 30;
else
return 29;
} else
return 0;
}

/**
* 传回农历 y年闰哪个月 1-12 , 没闰传回 0
* @param y
* @return
*/
final private static int leapMonth(int y){
return (int) (lunarInfo[y - 1900] & 0xf);
} /**
* 传回农历 y年m月的总天数
* @param y
* @param m
* @return
*/
final private static int monthDays(int y, int m){
if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
return 29;
else
return 30;
} /**
* 传回农历 y年的生肖
* @param y
* @return
*/
final public static String AnimalsYear(int y){
return Animals[(y - 4) % 12];
} /**
* 传入月日的offset 传回干支,0=甲子
* @param num
* @return
*/
final private static String cyclicalm(int num)
{
return (Gan[num % 10] + Zhi[num % 12]);
} /**
* 传入 offset 传回干支, 0=甲子
* @param y
* @return
*/
final public static String cyclical(int y){
int num = y - 1900 + 36;
return (cyclicalm(num));
} /**
* 传出农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5 .isLeap6
* @param y
* @param m
* @return
*/
final private long[] Lunar(int y, int m) {
long[] nongDate = new long[7];
int i = 0, temp = 0, leap = 0;
//Date baseDate = new Date(1900, 1, 31);
Date baseDate = new GregorianCalendar(1900+1900,1,31).getTime();
//Date objDate = new Date(y, m, 1);
Date objDate = new GregorianCalendar(y+1900,m,1).getTime();
long offset = (objDate.getTime() - baseDate.getTime()) / 86400000L;
if (y < 2000)
offset += year19[m - 1];
if (y > 2000)
offset += year20[m - 1];
if (y == 2000)
offset += year2000[m - 1];
nongDate[5] = offset + 40;
nongDate[4] = 14; for (i = 1900; i < 2050 && offset > 0; i++) {
temp = lYearDays(i);
offset -= temp;
nongDate[4] += 12;
}
if (offset < 0) {
offset += temp;
i--;
nongDate[4] -= 12;
}
nongDate[0] = i;
nongDate[3] = i - 1864;
leap = leapMonth(i); // 闰哪个月
nongDate[6] = 0; for (i = 1; i < 13 && offset > 0; i++) {
// 闰月
if (leap > 0 && i == (leap + 1) && nongDate[6] == 0) {
--i;
nongDate[6] = 1;
temp = leapDays((int) nongDate[0]);
} else {
temp = monthDays((int) nongDate[0], i);
} // 解除闰月
if (nongDate[6] == 1 && i == (leap + 1))
nongDate[6] = 0;
offset -= temp;
if (nongDate[6] == 0)
nongDate[4]++;
} if (offset == 0 && leap > 0 && i == leap + 1) {
if (nongDate[6] == 1) {
nongDate[6] = 0;
} else {
nongDate[6] = 1;
--i;
--nongDate[4];
}
}
if (offset < 0) {
offset += temp;
--i;
--nongDate[4];
}
nongDate[1] = i;
nongDate[2] = offset + 1;
return nongDate;
} /**
* 传出y年m月d日对应的农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5 .isLeap6
* @param y
* @param m
* @param d
* @return
*/
final public static long[] calElement(int y, int m, int d)
{
long[] nongDate = new long[7];
int i = 0, temp = 0, leap = 0;
//Date baseDate = new Date(0, 0, 31);
Date baseDate = new GregorianCalendar(0+1900,0,31).getTime();
//Date objDate = new Date(y - 1900, m - 1, d);
Date objDate = new GregorianCalendar(y,m-1,d).getTime();
long offset = (objDate.getTime() - baseDate.getTime()) / 86400000L;
nongDate[5] = offset + 40;
nongDate[4] = 14; for (i = 1900; i < 2050 && offset > 0; i++) {
temp = lYearDays(i);
offset -= temp;
nongDate[4] += 12;
}
if (offset < 0) {
offset += temp;
i--;
nongDate[4] -= 12;
}
nongDate[0] = i;
nongDate[3] = i - 1864;
leap = leapMonth(i); // 闰哪个月
nongDate[6] = 0; for (i = 1; i < 13 && offset > 0; i++) {
// 闰月
if (leap > 0 && i == (leap + 1) && nongDate[6] == 0) {
--i;
nongDate[6] = 1;
temp = leapDays((int) nongDate[0]);
} else {
temp = monthDays((int) nongDate[0], i);
} // 解除闰月
if (nongDate[6] == 1 && i == (leap + 1))
nongDate[6] = 0;
offset -= temp;
if (nongDate[6] == 0)
nongDate[4]++;
} if (offset == 0 && leap > 0 && i == leap + 1) {
if (nongDate[6] == 1) {
nongDate[6] = 0;
} else {
nongDate[6] = 1;
--i;
--nongDate[4];
}
}
if (offset < 0) {
offset += temp;
--i;
--nongDate[4];
}
nongDate[1] = i;
nongDate[2] = offset + 1;
return nongDate;
} public final static String getChinaDate(int day) {
String a = "";
if (day == 10)
return "初十";
if(day==20)
return "二十";
if(day==30)
return "三十";
int two = (int) ((day) / 10);
if (two == 0)
a = "初";
if (two == 1)
a = "十";
if (two == 2)
a = "廿";
if (two == 3)
a = "三";
int one = (int) (day % 10);
switch (one) {
case 1:
a += "一";
break;
case 2:
a += "二";
break;
case 3:
a += "三";
break;
case 4:
a += "四";
break;
case 5:
a += "五";
break;
case 6:
a += "六";
break;
case 7:
a += "七";
break;
case 8:
a += "八";
break;
case 9:
a += "九";
break;
}
return a;
}

public static String today(){
Calendar today = Calendar.getInstance(Locale.SIMPLIFIED_CHINESE);
int year = today.get(Calendar.YEAR);
int month = today.get(Calendar.MONTH)+1;
int date = today.get(Calendar.DATE);
long[] l = calElement(year, month, date);
StringBuffer sToday = new StringBuffer();
try{
sToday.append(sdf.format(today.getTime()));
sToday.append(" 农历");
sToday.append(cyclical(year));
sToday.append('(');
sToday.append(AnimalsYear(year));
sToday.append(")年");
sToday.append(nStr1[(int)l[1]]);
sToday.append("月");
sToday.append(getChinaDate((int) (l[2])));
return sToday.toString();
}finally{
sToday = null;
}
}

private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy年M月d日 EEEEE");

/**
* 农历日历工具使用演示
* @param args
*/
public static void main(String[] args) {
System.out.println(today());
}
}然后在另一个jsp页面
    <%
     LunarCalendar asdf=new LunarCalendar();
     asdf.LunarCalendar();
    %>
    <%=asdf%>应该怎么改啊~~~~

你这个类里根本就没有.LunarFullDate()这个方法，怎么能调用呢。

<%
     LunarCalendar asdf=new LunarCalendar();
     String _today = asdf.today()    %>
    <%=_today%>

那应该怎么用呢?这个好像不用传什么参数,就是调用main,然后显示就行了,这个应该怎么用呢?

少了个冒号
<%
     LunarCalendar asdf=new LunarCalendar();
     String _today = asdf.today();    %>
    <%=_today%>

不行啊,显示
Generated servlet error:
The method today() is undefined for the type LunarCalendar
这是什么错误?

你的方法是静态的，不用实例化，直接调用试试
LunarCalendar.today();

一、删除main()方法，在这种情况下main()方法只是做程序测试用的，对程序运行来说没用二、在jsp中引用<jsp:useBean id="aa"  class="com.xs.unit.LunarCalendar"/>
       <% out.println(aa.today()); %>三、也可以这么写<%@ page import="com.xs.unit.LunarCalendar"%>
       <%
             LunarCalendar lc = new LunarCalendar();
             out.println(lc.today());
        %>
    跟二的结果是一样的

我注释掉了main()方法,然后用方法3,显示
Generated servlet error:
The method today() is undefined for the type LunarCalendar郁闷死了

要么 public static String today() ==》 public String today()
LunarCalendar lc = new LunarCalendar();
out.println(lc.today());
要么 out.println(LunarCalendar.today());

调试易

请教一个很菜的问题

解决方案 »