數據庫保存的是陽歷日期，有時候會遇到把陽歷換成陰歷的需求，例如下圖把陽歷轉換成陰歷。
這個問題是我在開發報表過程中遇到的一個小需求，利用的工具是FineReport8.0版本，解決思路是首先定義一個可以將陽歷轉為陰歷的類，然后自定義FineReport函數，在run方法中獲取年月日參數并調用之前的類將陽歷轉為陰歷，最終返回給報表。
實現步驟：
1、 陽歷轉陰歷的類
FineReport里面會提供一個現成的農歷日歷工具類SolarToLunar，該類中通過today(intyear, int month, int day)方法可將輸入的年、月、日對應的陽歷轉為陰歷日期，完整代碼入下：
package com.fr.function;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
public class SolarToLunar {
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 };
public 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",
"龍", "蛇", "馬", "羊", "猴", "雞", "狗", "豬" };
private final static String[] solarTerm = new String[] { "小寒", "大寒", "立春",
"雨水", "驚蟄", "春分", "清明", "谷雨", "立夏", "小滿", "芒種", "夏至", "小暑", "大暑",
"立秋", "處暑", "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 情人節",
"0308 婦女節", "0312 植樹節", "0315 消費者權益日", "0401 愚人節", "0501 勞動節",
"0504 青年節", "0512 護士節", "0601 兒童節", "0701 建黨節", "0801 建軍節",
"0808 父親節", "0909 毛澤東逝世紀念", "0910 教師節", "0928 孔子誕辰", "1001*國慶節",
"1006 老人節", "1024 聯合國日", "1112 孫中山誕辰", "1220 澳門回歸", "1225 圣誕節",
"1226 毛澤東誕辰" };
private final static String[] lFtv = new String[] { "0101*農歷春節",
"0115 元宵節", "0505 端午節", "0707 七夕情人節", "0815 中秋節", "0909 重陽節",
"1208 臘八節", "1224 小年", "0100*除夕" };
/**
* 傳回農歷 y年的總天數
*
* @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));
}
/**
* 傳回農歷 y年閏月的天數
*
* @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;
}
/**
* 傳回農歷 y年閏哪個月 1-12 , 沒閏傳回 0
*
* @param y
* @return
*/
final private static int leapMonth(int y) {
return (int) (lunarInfo[y - 1900] & 0xf);
}
/**
* 傳回農歷 y年m月的總天數
*
* @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;
}
/**
* 傳回農歷 y年的生肖
*
* @param y
* @return
*/
final public static String AnimalsYear(int y) {
return Animals[(y - 4) % 12];
}
/**
* 傳入 月日的offset 傳回干支,0=甲子
*
* @param num
* @return
*/
final private static String cyclicalm(int num) {
return (Gan[num % 10] + Zhi[num % 12]);
}
/**
* 傳入 offset 傳回干支, 0=甲子
*
* @param y
* @return
*/
final public static String cyclical(int y) {
int num = y - 1900 + 36;
return (cyclicalm(num));
}
/**
* 傳出農歷.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 GregorianCalendar(1900 + 1900, 1, 31).getTime();
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); // 閏哪個月
nongDate[6] = 0;
for (i = 1; i < 13 && offset > 0; i++) {
// 閏月
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);
}
// 解除閏月
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;
}
/**
* 傳出y年m月d日對應的農歷.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 GregorianCalendar(0 + 1900, 0, 31).getTime();
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); // 閏哪個月
nongDate[6] = 0;
for (i = 1; i < 13 && offset > 0; i++) {
// 閏月
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);
}
// 解除閏月
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(int y, int m, int d) {
int year = y;
int month = m;
int date = d;
long[] l = calElement(year, month, date);
StringBuffer sToday = new StringBuffer();
try {
sToday.append(" 農歷");
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");
/**
* 農歷日歷工具使用演示
*
* @param args
*/
public static void main(String[] args) {
System.out.println(today(1988, 10, 27));
}
}
2、自定義FineReport函數
自定義函數Lunar擴展于AbstractFunction，并重寫run方法，獲得年月日參數值，調用農歷日歷工具類SolarToLunar的today方法，求得農歷日期并返回，代碼如下：
package com.fr.function;
import com.fr.script.AbstractFunction;
public class Lunar extends AbstractFunction {
public Object run(Object[] args) {
String result = "";
int y = Integer.parseInt(args[0].toString());
int m = Integer.parseInt(args[1].toString());
int d = Integer.parseInt(args[2].toString());
result = SolarToLunar.today(y, m, d);
return result;
}
}
3、編譯并運行
編譯自定義函數
編譯Lunar.java和SolarToLunar.java類生成Lunar.class和SolarToLunar.class文件拷貝至報表應用所在目錄/WEB-INF/classes/com/fr/function下。
注冊自定義函數
啟動設計器，點擊服務器|函數管理器，新增函數取名為Lunar，選擇Lunar.class類，如下圖：
自定義函數定義好了就可以在設計器中直接使用。
比如在單元格中寫入公式=Lunar(2011,7,11)，預覽模板，可以看到日期2011年7月11日陽歷就可以轉換成陰歷。
若數據庫日期類型字段如圖：
拖到模板設計界面，設置高級屬性，在自定義顯示值里面輸入公式Lunar(year($),month($),day($$$))，如下圖設置，則可把保存在數據庫里面的陽歷日期轉換成陰歷了。
