数字大小写转换

数字大小写转换

package com.ggy.test.demo1;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @function 阿拉伯数字转大写汉字，大写汉字转阿拉伯数字,最大只支持16位数,不支持小数
* @author gonggy
*
*/
public class DigitConvert {

private static final char[] UPPER = {'零','壹','贰','叁','肆','伍','陆','柒','捌','玖'};
private static final char[] NUIT = {'拾','佰','仟','万','亿'};
private static final char[] DIGIT = {'0','1','2','3','4','5','6','7','8','9'};
private static final Map<Character, Character> mapU = new HashMap<Character, Character>();
private static final Map<Character, Character> mapD = new HashMap<Character, Character>();
private static final List<Character> listN = new ArrayList<Character>();
private StringBuilder num;

static {
for(int i=0; i<DIGIT.length; i++){
mapU.put(DIGIT[i], UPPER[i]);
mapD.put(UPPER[i], DIGIT[i]);
}
for(int i=0; i<NUIT.length; i++){
listN.add(NUIT[i]);
}
}

/**
* 阿拉伯数字转大写汉字
* @param digit 待转换数字
* @return
*/
public String convertToUpper(String digit){
num = new StringBuilder();
String[] temp = digit.split("^0{0,}"); //形如0010转为10
String removeZero = temp.length == 2 ? temp[1] : temp[0];
//逆序循环，最终字符串需转换
for(int i=removeZero.length()-1 , j=0; i>=0; i--, j++){
switch (j) {
case 0: num.append(mapU.get(removeZero.charAt(i)));break;
case 4: num.append(NUIT[3]).append(mapU.get(removeZero.charAt(i)));break;//万
case 8: num.append(NUIT[4]).append(mapU.get(removeZero.charAt(i)));break;//亿
default:round(i, j%4, removeZero);//每4位一循环
}
}
//转换后的字符串首位会出现多余的零，去除首位零
if(num.charAt(0) == UPPER[0]){
num.deleteCharAt(0);
}
//转换后的字符串中间会出现形如“壹佰零万”的情况，去除字符串中多余的零
for(int i=0; i<num.length(); i++){
if(num.charAt(i) == UPPER[0] &&
listN.contains(num.charAt(i-1)) &&
listN.contains(num.charAt(i+1))){
num.deleteCharAt(i);
}
}
//逆序转换
return num.reverse().toString();
}

private void round(int i, int j, String removeZero){
//出现连续两个0时，不作处理，直接返回
if(num.charAt(num.length()-1) == UPPER[0] && removeZero.charAt(i) == DIGIT[0]){
return;
}

if(removeZero.charAt(i)!=DIGIT[0]){
switch (j) {
case 0: num.append(NUIT[3]).append(mapU.get(removeZero.charAt(i)));break;//i=12 （万亿级）
case 1: num.append(NUIT[0]).append(mapU.get(removeZero.charAt(i)));break;//拾
case 2: num.append(NUIT[1]).append(mapU.get(removeZero.charAt(i)));break;//佰
case 3: num.append(NUIT[2]).append(mapU.get(removeZero.charAt(i)));break;//仟
default:num.append(mapU.get(removeZero.charAt(i)));break;
}
} else{
num.append(mapU.get(removeZero.charAt(i)));
}
}

/**
* 大写汉字转阿拉伯数字
* @param upper 待转换大写数字汉字
* @return
*/
public String convertToDigit(String upper){
long digit = 1L;  //倍数
long result = 0L; //最终结果
long pre = 0L;    //前一次转换后的数
long w_radix = 1L;//基数（万）
long y_radix = 1L;//基数（亿)
int w = 0; //记录万出现的次数
int y = 0; //记录亿出现的次数
int z = 0; //记录连续出现单位的次数（数组NUIT中的单位）
for(int i=upper.length()-1; i>=0; i--){
if(mapD.containsKey(upper.charAt(i)) && upper.charAt(i) != UPPER[0]){
result = digit * Long.parseLong(String.valueOf(mapD.get(upper.charAt(i)))) + pre;
pre = result;
digit = 1L; //重置倍数
z = 0;  //重置z
} else if(listN.contains(upper.charAt(i))){
if((++z) == 2) { //形如“壹佰亿”，连续出现单位字符时，需重置倍数
digit = 1L;
}

if(upper.charAt(i) == NUIT[0]){
/* 当数字大于亿小于万亿时，需特殊处理  */
digit = (w ==1 && y == 1) ? digit*10L*y_radix : digit*10L*w_radix*y_radix;
}
else if(upper.charAt(i) == NUIT[1]){
digit = (w ==1 && y == 1) ? digit*100L*y_radix : digit*100L*w_radix*y_radix;
}
else if(upper.charAt(i) == NUIT[2]){
digit = (w ==1 && y == 1) ? digit*1000L*y_radix : digit*1000L*w_radix*y_radix;
}
else if(upper.charAt(i) == NUIT[3]){
digit = (w ==1 && y == 1) ? digit*10000L*y_radix : digit*10000L;
w_radix = 10000L;
++w;
}
else if(upper.charAt(i) == NUIT[4]){
digit *= 100000000L;
y_radix = 100000000L;
++y;
}
}
}
return String.valueOf(result);
}
}

Junit4

package com.ggy.test.demo1;

import org.junit.Assert;
import org.junit.Test;

public class DigitConvertTest {

@Test
public void testConvertToDigit() {
DigitConvert convert = new DigitConvert();
Assert.assertEquals("1", convert.convertToDigit("壹"));
Assert.assertEquals("100", convert.convertToDigit("壹佰"));
Assert.assertEquals("1000", convert.convertToDigit("壹仟"));
Assert.assertEquals("10000000", convert.convertToDigit("壹仟万"));
Assert.assertEquals("1120052111001", convert.convertToDigit("壹万壹仟贰佰亿伍仟贰佰壹拾壹万壹仟零壹"));
Assert.assertEquals("1006321051021011", convert.convertToDigit("壹仟零陆万叁仟贰佰壹拾亿伍仟壹佰零贰万壹仟零壹拾壹"));
}

@Test
public void testConvertToUpper(){
DigitConvert convert = new DigitConvert();
Assert.assertEquals("壹拾", convert.convertToUpper("10"));
Assert.assertEquals("壹佰", convert.convertToUpper("100"));
Assert.assertEquals("壹仟", convert.convertToUpper("1000"));
Assert.assertEquals("壹万", convert.convertToUpper("10000"));
Assert.assertEquals("壹仟万", convert.convertToUpper("10000000"));
Assert.assertEquals("壹万壹仟贰佰亿伍仟贰佰壹拾壹万壹仟零壹", convert.convertToUpper("1120052111001"));
Assert.assertEquals("壹仟零陆万叁仟贰佰壹拾亿伍仟壹佰零贰万壹仟零壹拾壹", convert.convertToUpper("1006321051021011"));
}

}