package practice;
import java.util.Arrays;
/**
* 数字与中文数字互转(最大处理数字不超过万兆即:9999999999999999.9999)
* @author Archimedes
* @Date 6 7 19
*/
public class ChineseNumberAndNumber {
private static final char NUMBER_CONSTRAINT[] = {'9', '8', '7', '6', '5', '4', '3', '2', '1', '0', '.'};
private static final String[] DECIMAL_UNIT = {"角", "分", "厘", "毫"};
private static final String[] CHINESE_NUMBER = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
private static final String[] INTEGER_UNIT = {"", "万", "亿", "兆"};
private static final String[] INTEGER_UNIT1 = {"", "拾", "佰", "仟"};
/**
* 数字转中文数字
* @param number
* @return
*/
public static String numberToChineseNumber(String number) {
//数字有效性判断
//先判断number中的数字是否在NUMBER_CONSTRAINT[]中
int quantity = NUMBER_CONSTRAINT.length - 1;
for (int i = 0; i < number.length(); i++) {
char unit = number.charAt(i);
for (int j = 0; j < NUMBER_CONSTRAINT.length; j++) {
if (unit == NUMBER_CONSTRAINT[j]) break;
if (j == quantity) return "请输入有效数字";
}
}
//再判断number中小数点是否不超过1个且小数点不在第一位和最后一位
int quantity1 = 0;
for (int i = 0; i < number.length(); i++) {
if ('.' == number.charAt(i) && (i == 0 || i == number.length() - 1)) return "1请输入有效数字";
if ('.' == number.charAt(i)) {
++quantity1;
if (quantity1 == 2) return "2请输入有效数字";
}
}
//最后做数字范围的有效判断,并且把诸如0.000000000000000的数字转换为0
if (quantity1 == 0) {
number = headNumberIsZero(number);
if (number.length() > 16) return "3请输入有效数字";
} else {
String[] split = number.split("[.]");
//处理整数部分
split[0] = headNumberIsZero(split[0]);
if (split[0].length() > 16) return "4请输入有效数字";
//处理小数部分
if (split[1].length() > 4) {
for (int i = 4; i < split[1].length(); i++) {
if ('0' != split[1].charAt(i)) return "5请输入有效数字";
}
split[1] = split[1].substring(0, 4);
}
for (int i = split[1].length() - 1; i >= 0; i--) {
if ('0' == split[1].charAt(i)) split[1] = split[1].substring(0, i);
else break;
}
//合并整数与小数
if (split[1].isEmpty()) number = split[0];
else number = split[0] + "." + split[1];
}
//数字有效性判断完毕
//数字转中文数字
String[] result = {"", ""};
String[] split = number.split("[.]");
//处理小数部分
if (split.length == 2) {
int c = 0; //定义标识用于判断前一位是否为0
for (int i = 0; i < split[1].length(); i++) {
if (c == 0 && ('0' == split[1].charAt(i))) {
result[1] += CHINESE_NUMBER[0];
c = 1;
} else if ('0' != split[1].charAt(i)) {
result[1] += (CHINESE_NUMBER[Integer.parseInt(String.valueOf(split[1].charAt(i)))] + DECIMAL_UNIT[i]);
c = 0;
}
}
}
//处理整数部分
//把整数部分从左到右每4个一组放入数组
String[] integerPart = new String[(split[0].length() - 1) / 4 + 1];
for (int i = split[0].length() - 1; i >= 0; i -= 4) {
if (i - 3 >= 0) integerPart[i / 4] = split[0].substring(i - 3, i + 1);
else integerPart[i / 4] = split[0].substring(0, i + 1);
}
System.out.println(Arrays.toString(integerPart));
//转换
int length = integerPart.length;
int c = 0; //用于判断前一位是否为0
if (length > 1) {
int l = 1; ////用于判断上一次计数单位是否全为0(0表示全为0)
for (int i = 0; i < integerPart.length; i++) {
int x = 0; //用于判断计数单位是否全为0
int length1 = integerPart[i].length();
for (int j = 0; j < length1; j++) {
if (c == 0 && '0' != integerPart[i].charAt(j)) {
String temp = CHINESE_NUMBER[Integer.parseInt(String.valueOf(integerPart[i].charAt(j)))]
+ INTEGER_UNIT1[length1 - 1 -j];
result[0] += temp;
x = 1;
} else if ('0' == integerPart[i].charAt(j)) {
c = 1;
} else if (c == 1 && j == 0 && '0' != integerPart[i].charAt(j)) {
if (l == 0) result[0] += "零";
String temp = CHINESE_NUMBER[Integer.parseInt(String.valueOf(integerPart[i].charAt(j)))]
+ INTEGER_UNIT1[length1 - 1 -j];
result[0] += temp;
c = 0; x = 1;
} else if (c == 1 && j != 0 && '0' != integerPart[i].charAt(j)) {
String temp = "零" + CHINESE_NUMBER[Integer.parseInt(String.valueOf(integerPart[i].charAt(j)))]
+ INTEGER_UNIT1[length1 - 1 -j];
result[0] += temp;
c = 0; x = 1;
}
}
l = x; //把此次循环的计数单位是否全为0的结果赋值给变量,用于下次循环判断
if (x == 1) result[0] += INTEGER_UNIT[length - 1 - i];
}
result[0] += "元";
} else {
int length1 = integerPart[0].length();
for (int i = 0; i < length1; i++) {
if (c == 0 && ('0' != integerPart[0].charAt(i))) {
String temp = CHINESE_NUMBER[Integer.parseInt(String.valueOf(integerPart[0].charAt(i)))]
+ INTEGER_UNIT1[length1 - 1 - i];
result[0] += temp;
} else if ('0' == integerPart[0].charAt(i)) {
if (length1 == 1) {
result[0] += "零";
}
c = 1;
} else if (c == 1 && ('0' != integerPart[0].charAt(i))) {
String temp = "零" + CHINESE_NUMBER[Integer.parseInt(String.valueOf(integerPart[0].charAt(i)))]
+ INTEGER_UNIT1[length1 - 1 - i];
result[0] += temp;
c = 0;
}
}
result[0] += "元";
}
if (split.length == 1) {
result[0] += "整";
return result[0];
} else {
if ("零元".equals(result[0])) return result[1];
else return result[0] + result[1];
}
//数字转中文数字完毕
}
/**
* 把数字的前几个连续的0去掉,但数字如全为0则保留1个
* @param number
* @return
*/
private static String headNumberIsZero(String number) {
try {
if ('0' == number.charAt(0)) return headNumberIsZero(number.substring(1));
else return number;
} catch (IndexOutOfBoundsException e) {
return "0";
}
}
private static String headNumberIsZero1(String number) {
if (number.isEmpty()) return "0";
if ('0' == number.charAt(0)) return headNumberIsZero(number.substring(1));
else return number;
}
private static String headNumberIsZero2(String number) {
if ('0' != number.charAt(0)) return number;
else {
for (int i = 1; i < number.length(); i++) {
if ('0' != number.charAt(i)) {
number = number.substring(i);
break;
} else if (i == number.length() -1) number = "0";
}
}
return number;
}
public static void main(String[] args) {
String number = numberToChineseNumber("64646405000.033");
System.out.println(number);
}
}
