java編寫數字金額大寫轉換代碼及原理

package com.msg;

import java.util.Scanner;

public class Renminbi {

     public static String hangeToBig(double value)
     {
         char[] hunit = { '拾', '佰', '仟' };                                                              // 段內位置表示
         char[] vunit = { '萬', '億' };                                                                       // 段名錶示
         char[] digit = { '零', '壹', '貳', '叄', '肆', '伍', '陸', '柒', '捌', '玖' };      // 數字表示
         long midVal = (long) (value * 100);                                                      // 轉化成整形
         String valStr = String.valueOf(midVal);                                             // 轉化成字符串

         String head = valStr.substring(0, valStr.length() - 2);                    // 取整數部分
         String rail = valStr.substring(valStr.length() - 2);                            // 取小數部分

         String prefix = "";                                                                                    // 整數部分轉化的結果
         String suffix = "";                                                                                    // 小數部分轉化的結果
         // 處理小數點後面的數
         if (rail.equals("00"))
         // 如果小數部分爲0

        {
             suffix = "整";
         }
         else

         // 否則把角分轉化出來
         {
             suffix = digit[rail.charAt(0) - '0'] + "角" + digit[rail.charAt(1) - '0'] + "分";          }
         // 處理小數點前面的數
         char[] chDig = head.toCharArray();                                                     // 把整數部分轉化成字符數組
         char zero = '0';                                                                                          // 標誌'0'表示出現過0
         byte zeroSerNum = 0;                                                                            // 連續出現0的次數
         for (int i = 0; i < chDig.length; i++)
         { // 循環處理每個數字
             int idx = (chDig.length - i - 1) % 4;                                                    // 取段內位置
             int vidx = (chDig.length - i - 1) / 4;                                                     // 取段位置
             if (chDig[i] == '0')
             { // 如果當前字符是0
                 zeroSerNum++;                                                                                // 連續0次數遞增
                 if (zero == '0')
                 { // 標誌
                     zero = digit[0];
                 }
                 else if (idx == 0 && vidx > 0 && zeroSerNum < 4)
                 {
                     prefix += vunit[vidx - 1];
                     zero = '0';
                 }
                 continue;
             }
             zeroSerNum = 0;                                                                                   // 連續0次數清零
             if (zero != '0')
             { // 如果標誌不爲0,則加上,例如萬,億什麼的
                 prefix += zero;
                 zero = '0';
             }
             prefix += digit[chDig[i] - '0'];                                                              // 轉化該數字表示
             if (idx > 0)
                 prefix += hunit[idx - 1];
             if (idx == 0 && vidx > 0)
             {
                 prefix += vunit[vidx - 1];                                                                  // 段結束位置應該加上段名         

             }
         }

         if (prefix.length() > 0)
             prefix += '元';                                                                                         // 如果整數部分存在,則有元的字樣
         return prefix + suffix;                                                                              // 返回正確表示
     }

     public static void main(String[] args) {
      
      Scanner scanner  = new Scanner(System.in);
      System.out.println("輸入您要轉換的金額:");
      double value = scanner.nextDouble();
      System.out.println(hangeToBig(value));
  }

}

 

運行結果:


輸入您要轉換的金額:
2022125.52
貳佰零貳萬貳仟壹佰貳拾伍元伍角貳分

發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章