java实现 阿拉伯数字转换为汉字数字 算法

package test;

public class NumberFormatTest {

static String[] units = { "", "十", "百", "千", "万", "十万", "百万", "千万", "亿",

"十亿", "百亿", "千亿", "万亿" };

static char[] numArray = { '零', '一', '二', '三', '四', '五', '六', '七', '八', '九' };

/**

* @param args

*/

public static void main(String[] args) {

int num = 245000006;

String numStr = foematInteger(num);

print("num= " + num + ", convert result: " + numStr);

double decimal = 245006.234206;

print("============================================================");

String decStr = formatDecimal(decimal);

print("decimal= " + decimal + ", decStr: " + decStr);

}

private static String foematInteger(int num) {

char[] val = String.valueOf(num).toCharArray();

int len = val.length;

StringBuilder sb = new StringBuilder();

for (int i = 0; i < len; i++) {

String m = val[i] + "";

int n = Integer.valueOf(m);

boolean isZero = n == 0;

String unit = units[(len - 1) - i];

if (isZero) {

if ('0' == val[i - 1]) {

// not need process if the last digital bits is 0

continue;

} else {

// no unit for 0

sb.append(numArray
);

}

} else {

sb.append(numArray
);

sb.append(unit);

}

}

return sb.toString();

}

private static String formatDecimal(double decimal) {

String decimals = String.valueOf(decimal);

int decIndex = decimals.indexOf(".");

int integ = Integer.valueOf(decimals.substring(0, decIndex));

int dec = Integer.valueOf(decimals.substring(decIndex + 1));

String result = foematInteger(integ) + "." + formatFractionalPart(dec);

return result;

}

private static String formatFractionalPart(int decimal) {

char[] val = String.valueOf(decimal).toCharArray();

int len = val.length;

StringBuilder sb = new StringBuilder();

for (int i = 0; i < len; i++) {

int n = Integer.valueOf(val[i] + "");

sb.append(numArray
);

}

return sb.toString();

}

private static void print(Object arg0) {

System.out.println(arg0);

}

}