java练习：金额转换，阿拉伯数字转换成中文传统形式

需求：金额转换，阿拉伯数字转换成中文传统形式，例如 101000001010 转为壹仟零壹拾亿零壹仟零壹拾圆整

最终版：

import java.util.Scanner;
public class Test {public static void main(String[] args) {long num = 101000001010l;String[] digit =  {"零","壹","貳","叁","肆","伍","陆","柒","扒","玖"};String[] unit =  {"整","圆","拾","百","仟","万","拾","百","仟","亿","拾","百","仟","万"};while(true){num = new Scanner(System.in).nextLong();char[] chArr = Long.toString(num).toCharArray();StringBuilder sb = new StringBuilder("");for(int i = 0;i < chArr.length;i++){String s = digit[Integer.parseInt(String.valueOf(chArr[i]))];String s2 = unit[chArr.length-i];sb.append(s).append(s2);  }sb.append(unit[0]);String str = sb.toString();str = change(str);System.out.println(str);}}private static String change(String str) {String s = str.replaceAll("零[仟百拾]", "零");s = s.replaceAll("零+", "零").replaceAll("零亿", "亿").replaceAll("零万", "万");s = s.replaceAll("零圆", "圆").replace("亿万", "亿");return s;}
}

有bug版

import java.util.Scanner;public class Test2 {public static void main(String[] args) {// TODO Auto-generated method stublong num = 101000001010l;//一千零一十亿零一千零一十圆整num = 1010l;//一千零一十亿零一千零一十圆整while(true){System.out.println("输入数学数字：");num = new Scanner(System.in).nextLong();String[] unit = {"圆整","万","亿"};int count = -1;StringBuilder sb = new StringBuilder("");while(num>0){count++;String s = "";long n = num%10000;//取后四位if(n < 10)s = "000"+n;else if(n < 100 )s = "00"+n;else if(n < 1000)s = "0"+n;    elses = s+n;num /= 10000;if(!s.equals("0000"))s = toNum(s)+unit[count];//返回的数字加单位  elses = toNum(s);sb.insert(0, s);
//          System.out.println(sb);}String chineseNum = sb.toString();System.out.println(chineseNum);}}public static String toNum(String num){String[] digit =    {"零","壹","貳","叁","肆","伍","陆","柒","扒","玖"};char[] ch = num.toCharArray();//字符串形式的四位数int count = 0;//记录字符串含0的个数int index = -1;while((index = num.indexOf("0",index+1))!= -1)count++;
//      System.out.println("字符串含0个数count = "+count);String numStr = "";//返回的中文数字switch(count){case 4:numStr = "零";break;case 3:int temp = Integer.parseInt(num);if(temp<10)numStr = digit[ch[3]-'0'];else if(temp > 9 && temp < 101)numStr = digit[ch[2]-'0']+"拾";else if(temp > 99 && temp < 1000)numStr = digit[ch[1]-'0'] + "百";elsenumStr = digit[ch[0]-'0'] + "仟";break;case 2:if(num.matches("[0][0][1-9][1-9]")){numStr = numStr + digit[ch[2]-'0']+"拾"+digit[ch[3]-'0'];;}else if(num.matches("[1-9][0][0][1-9]")){numStr = numStr + digit[ch[0]-'0'] + "仟" +"零"+ digit[ch[3]-'0'];}else if(num.matches("[1-9][1-9][0][0]")){numStr = numStr + digit[ch[0]-'0'] + "仟" +digit[ch[1]-'0'] + "百";}else if(num.matches("[0][1-9][1-9][0]")){numStr = numStr + digit[ch[1]-'0'] + "百"+ digit[ch[2]-'0']+"拾";}else if(num.matches("[0][1-9][0][1-9]")){numStr = numStr + digit[ch[1]-'0'] + "百"+"零"+ digit[ch[3]-'0'];}else if(num.matches("[1-9][0][1-9][0]")){numStr = numStr + digit[ch[0]-'0'] + "仟"+"零"+ digit[ch[2]-'0']+"拾";}break;case 1:if(num.matches("[0][1-9][1-9][1-9]")){numStr = numStr + digit[ch[1]-'0'] + "百" + digit[ch[2]-'0']+"拾"+digit[ch[3]-'0'];}else if(num.matches("[1-9][0][1-9][1-9]")){numStr = numStr + digit[ch[0]-'0'] + "仟" +"零"+  digit[ch[2]-'0']+"拾"+digit[ch[3]-'0'];}else if(num.matches("[1-9][1-9][0][1-9]")){numStr = numStr + digit[ch[0]-'0'] + "仟" +digit[ch[1]-'0'] + "百" + "零"+digit[ch[3]-'0'];}else if(num.matches("[1-9][1-9][1-9][0]")){numStr = numStr + digit[ch[0]-'0'] + "仟" +digit[ch[1]-'0'] + "百" + digit[ch[2]-'0']+"拾";}break;default:numStr = numStr + digit[ch[0]-'0'] + "仟" +digit[ch[1]-'0'] + "百" + digit[ch[2]-'0']+"拾"+digit[ch[3]-'0'];}//     System.out.println(numStr);return numStr;}
}

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