java实现数字转换人民币中文大写工具

public class Data2Zh {
 final static private String NUMBER[] = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
 final static private String NUMBER2[] = { "?", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
 final static private String CBit[] = { "", "拾", "佰", "仟" };

 /**
 * 将数值大写
 */
 public static String capitalization(String szNum) {
 StringBuilder resstr = new StringBuilder();
 String tmpstr = szNum.trim();
 int sl = tmpstr.length();
 int sp = 0;
 int dotpos = tmpstr.indexOf('.');
 if (dotpos != -1) {
 while (sl > 1 && tmpstr.charAt(sl - 1) == '0')
 sl--;
 if (tmpstr.charAt(sl - 1) == '.')
 sl--;
 if (sl != tmpstr.length()) {
 tmpstr = tmpstr.substring(0, sl);
 }
 } else
 dotpos = sl;
 if (sl < 1)
 return NUMBER[0];
 if (tmpstr.charAt(0) == '-') {
 resstr.append("负");
 sp = 1;
 }
 String integerNum = tmpstr.substring(sp, dotpos - sp);
 String decimalNum = "";
 if (dotpos + 1 < sl)
 decimalNum = tmpstr.substring(dotpos + 1);
 sl = integerNum.length();
 sp = 0;
 while (sp < sl && integerNum.charAt(sp) == '0')
 sp++;
 if (sp > 0)
 integerNum = integerNum.substring(sp);
 int inl = integerNum.length();
 if (inl > 0) {
 int h = (inl - 1) % 4;
 int j = (inl - 1) / 4 + 1;
 sp = 0;
 boolean allzero = false;
 boolean preallzero = false;
 for (; j > 0; j--) {
 int k = h;
 h = 3;
 boolean preiszero = allzero;
 allzero = true;
 for (; k >= 0; k--, sp++) {
 if (integerNum.charAt(sp) == '0')
 preiszero = true;
 else {
 allzero = false;
 if (preiszero)
 resstr.append("零");
 preiszero = false;
 resstr.append(NUMBER[(byte) (integerNum.charAt(sp)) - 48]).append(CBit[k]);
 }
 } 
 // end for k
 if (/* j!=0 && */ j % 2 == 0) {
 if (!allzero)
 resstr.append("万");
 } else {
 if (!allzero || !preallzero) {
 int repyi = j / 2;
 for (int i = 0; i < repyi; i++)
 resstr.append("亿");
 }
 }
 preallzero = allzero;
 } 
 // end for j
 } else
 resstr.append("零");

 int dnl = decimalNum.length();
 if (dnl > 0) {
 resstr.append("点");
 for (int i = 0; i < dnl; i++) {
 resstr.append(NUMBER[(byte) (decimalNum.charAt(i)) - 48]);
 }
 }
 return resstr.toString();
 }

 /**
 * 获得某一位上的数值，如果 nBit<0 则获得小数点后面的位数
 */
 static public char getNumByte(String szNum, int nBit) {
 int sl = szNum.length();
 int nPos = 0;
 while (nPos < sl && szNum.charAt(nPos) != '.')
 nPos++;
 if (nBit < 0)
 nPos = nPos - nBit;
 else
 nPos = nPos - nBit - 1;
 if (nPos < 0 || nPos >= sl)
 return '0';
 return szNum.charAt(nPos);
 }

 public static String rmbChange(String rmb) {
 return capitalization((rmb.indexOf('.') >= 0 ? rmb.substring(0, rmb.indexOf('.')) : rmb)) + "元"
 + capitalization(String.valueOf(getNumByte(rmb, -1))) + "角"
 + capitalization(String.valueOf(getNumByte(rmb, -2))) + "分";
 }

 /**
 * 仅仅是把 0~9 转换为 "?","一","二","三","四","五","六","七","八","九"
 */
 public static String changeCN(String szNum) {
 StringBuilder sb = new StringBuilder();
 String str = szNum.trim();
 int sl = str.length();
 int sp = 0;

 if (sl < 1)
 return NUMBER2[0];
 for (; sp < sl; sp++)
 if (str.charAt(sp) >= '0' && str.charAt(sp) <= '9')
 sb.append(NUMBER2[str.charAt(sp) - '0']);
 else
 sb.append(str.charAt(sp));
 return sb.toString();
 }

 public static void main(String[] args) {
 System.out.println(rmbChange("825.45"));
 System.out.println(changeCN("2018"));
 }
}