如何将数字金额转为汉字大写（可直接食用）

直接给出代码，复制即用

public static String arabiaToChinese(String number){
  if(isBlank(number)){
   return "零";
  }
  if(!isNumeric(number)){
   //是否是数字类型
   return "";
  }
  number = number.replaceAll(",","");
  number = number.replaceAll(" ","");
  if(Double.parseDouble(number) == 0){
   return "零";
  }
  BigDecimal decimal = new BigDecimal(number);
  number = decimal.toString();
  //分成两部分来处理
  String[] num = number.split("\\.");
  String head = num[0];
  if(head.length() > 10){
      System.out.println("数字超过十亿，无法计算");
      return "";
        }
  StringBuffer headNew = new StringBuffer();
  for(int i = head.length() - 1; i >= 0; i--){
      String si = String.valueOf(head.charAt(i));
   StringBuffer headNewString = new StringBuffer();
   //String ss = String.valueOf( num[0].charAt(i));
   switch (String.valueOf(head.charAt(i))){
    case "0":headNewString.append("零" + headNewString);break;
    case "1":headNewString.append("壹" + headNewString);break;
    case "2":headNewString.append("贰" + headNewString);break;
    case "3":headNewString.append("叁" + headNewString);break;
    case "4":headNewString.append("肆" + headNewString);break;
    case "5":headNewString.append("伍" + headNewString);break;
    case "6":headNewString.append("陆" + headNewString);break;
    case "7":headNewString.append("柒" + headNewString);break;
    case "8":headNewString.append("捌" + headNewString);break;
    case "9":headNewString.append("玖" + headNewString);break;
   }
   switch (num[0].length() - i - 1){
    case 0:headNewString.append("元");break;
    case 1:if(!"0".equals(si)) headNewString.append("拾");break;
    case 2:if(!"0".equals(si)) headNewString.append("佰");break;
    case 3:if(!"0".equals(si)) headNewString.append("仟");break;
    case 4:headNewString.append("万");break;
    case 5:if(!"0".equals(si)) headNewString.append("拾");break;
    case 6:if(!"0".equals(si)) headNewString.append("佰");break;
    case 7:if(!"0".equals(si)) headNewString.append("仟");break;
    case 8:headNewString.append("亿");break;
    case 9:headNewString.append("拾");break;
   }
   headNew = headNewString.append(headNew);
  }
  if(num.length > 1){
   if(num[1].length() > 2){
    System.out.println("小数点之后只能保留两位,系统将自动截断");
    num[1] = num[1].substring(0,2);
   }
   char[] tail = num[1].toCharArray();
   for (int i = 0; i < tail.length; i++) {
    StringBuffer tailNewString = new StringBuffer();
    switch (String.valueOf(tail[i])){
     case "0":tailNewString.append("零" + tailNewString);break;
     case "1":tailNewString.append("壹" + tailNewString);break;
     case "2":tailNewString.append("贰" + tailNewString);break;
     case "3":tailNewString.append("叁" + tailNewString);break;
     case "4":tailNewString.append("肆" + tailNewString);break;
     case "5":tailNewString.append("伍" + tailNewString);break;
     case "6":tailNewString.append("陆" + tailNewString);break;
     case "7":tailNewString.append("柒" + tailNewString);break;
     case "8":tailNewString.append("捌" + tailNewString);break;
     case "9":tailNewString.append("玖" + tailNewString);break;
    }
    if(i == 0) tailNewString.append("角");
    if(i == 1) tailNewString.append("分");
    headNew.append(tailNewString);
   }
  }
        String subject = headNew.toString();
  while (subject.contains("零零")) {
            subject = subject.replaceAll("零零", "零");
        }
  subject = subject.replaceAll("零亿","亿");
  subject = subject.replaceAll("亿万","亿");
  subject = subject.replaceAll("零万","万");
  subject = subject.replaceAll("零元","元");
  subject = subject.replaceAll("零角","");
  subject = subject.replaceAll("零分","");
        String c = String.valueOf(subject.charAt(subject.length() - 1));
        if("元".equals(c) || "角".equals(c)){
      subject = subject + "整";
        }
        return subject;
 }