主题：Java实现的数字中文大写（正写）转换

import java.math.BigDecimal;?
import java.text.DecimalFormat;?
import java.text.NumberFormat;?

/**?
* 中文数字格式化，将数字转换成中文大写形式，以及将中文大写形式转换成数字?
* @title CNNumberFormat.java?
* @author chouhua?
* @date 2013-4-16?
*/?
public class CNNumberFormat {?

/**?
* 中文数字正写?
*/?
private static final char[] cnNumbers = { '零', '壹', '贰', '叁', '肆', '伍',?
'陆', '柒', '捌', '玖' };?

private static final char[] stdNumbers = { '0', '1', '2', '3', '4', '5',?
'6', '7', '8', '9' };?

/**?
* 货币单位?
*/?
// 顺序不能变，否则下面的实现代码页需要同步修改?
private static final char[] units = { '厘', '分', '角', '元', '拾', '佰',?
'仟', '万', '拾', '佰', '仟', '亿', '拾', '佰', '仟' };?

/**?
* 是否输出货币单位元角分的完整格式，简单格式通常用于套打纸张上已印有货币单位的情形。?
*/?
private boolean fullFormat = true;?

public CNNumberFormat() {?

}?

public CNNumberFormat(boolean fullFormat) {?
this.fullFormat = fullFormat;?
}?

/**?
* 取得大写形式的字符串?
* @return 中文正写的数字字符串?
*/?
public String format(double d) {?
NumberFormat nf = new DecimalFormat("#.###");?
String original = String.valueOf(nf.format(d));?
return this.transform(original);?
}?

public String format(long ln) {?
return this.transform(String.valueOf(ln));?
}?

private String transform(String original) {?
String integerPart = "";?
String floatPart = "";?

if (original.indexOf(".") > -1) {?
int dotIndex = original.indexOf(".");?
integerPart = original.substring(0, dotIndex);?
floatPart = original.substring(dotIndex + 1);?
}?
else {?
integerPart = original;?
}?
StringBuffer sb = new StringBuffer();?

// 整数部分处理?
for (int i = 0; i < integerPart.length(); i++) {?
int number = Integer?
.parseInt(String.valueOf(integerPart.charAt(i)));?
sb.append(cnNumbers[number]);?
if (fullFormat) {?
sb.append(units[integerPart.length() + 2 - i]);?
}?
}?

// 小数部分处理?
if (floatPart.length() >= 1) {?
for (int i = 0; i < floatPart.length(); i++) {?
int number = Integer.parseInt(String.valueOf(floatPart?
.charAt(i)));?
sb.append(cnNumbers[number]);?
if (fullFormat && i < 3) {?
sb.append(units[2 - i]);?
}?
}?
}?
else if (fullFormat) {?
sb.append('整');?
}?

return sb.toString();?

}?

/**?
* 将中文大写数字字符串转换成对应的数字类型?
* @param cnNumStr?
* @return Java Number类型对象?
*/?
public Number parse(String cnNumStr) {?
if (null == cnNumStr || "".equals(cnNumStr.trim())) {?
return null;?
}?
cnNumStr = cnNumStr.replaceAll("整", "");?
if (!cnNumStr.endsWith("元")) {?
cnNumStr = cnNumStr.replaceAll("元", ".");?
}?
for (int i = 0; i < cnNumbers.length; i++) {?
cnNumStr = cnNumStr.replace(cnNumbers[i], stdNumbers[i]);?
}?
for (int j = 0; j < units.length; j++) {?
cnNumStr = cnNumStr.replaceAll(units[j] + "", "");?
}?
BigDecimal b = new BigDecimal(cnNumStr);?
return b;?
}?

/**?
* @param args?
*/?
public static void main(String[] args) {?
CNNumberFormat cnFmt = new CNNumberFormat(true);?
System.out.println(cnFmt.format(123456789.12345));?
System.out.println(cnFmt.format(123456789));?
System.out.println(cnFmt.format(.123456789));?
System.out.println(cnFmt.format(0.1234));?
System.out.println(cnFmt.format(1));?
System.out.println(cnFmt.format(12));?
System.out.println(cnFmt.format(123));?
System.out.println(cnFmt.format(1234));?
System.out.println(cnFmt.format(12345));?
System.out.println(cnFmt.format(123456));?
System.out.println(cnFmt.format(1234567));?
System.out.println(cnFmt.format(12345678));?
System.out.println(cnFmt.format(123456789));?
System.out.println(cnFmt.parse("壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元壹角贰分叁厘"));?
}?

运行结果：?
壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元壹角贰分叁厘?
壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元整?
零元壹角贰分叁厘?
零元壹角贰分叁厘?
壹元整?
壹拾贰元整?
壹佰贰拾叁元整?
壹仟贰佰叁拾肆元整?
壹万贰仟叁佰肆拾伍元整?
壹拾贰万叁仟肆佰伍拾陆元整?
壹佰贰拾叁万肆仟伍佰陆拾柒元整?
壹仟贰佰叁拾肆万伍仟陆佰柒拾捌元整?
壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元整?
123456789.123?