把金额转换为汉字和把一个 0~9999 之间的整数转换为汉字的字符串

package cyachina.util;

/**
* To change this template use File | Settings | File Templates.
*/
public class MoneyUtil {

public static String[] chineseDigits = new String[] { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};

/**
* 把金额转换为汉字表示的数量，小数点后四舍五入保留两位
* @param amount
* @return
*/
public static String amountToChinese(double amount) {

if(amount > 99999999999999.99 || amount < -99999999999999.99)
throw new IllegalArgumentException("参数值超出允许范围 (-99999999999999.99 ～ 99999999999999.99)！");

boolean negative = false;
if(amount < 0) {
negative = true;
amount = amount * (-1);
}

long temp = Math.round(amount * 100);
int numFen = (int)(temp % 10); // 分
temp = temp / 10;
int numJiao = (int)(temp % 10); //角
temp = temp / 10;
//temp 目前是金额的整数部分

int[] parts = new int[20]; // 其中的元素是把原来金额整数部分分割为值在 0~9999 之间的数的各个部分
int numParts = 0; // 记录把原来金额整数部分分割为了几个部分（每部分都在 0~9999 之间）
for(int i=0; ; i++) {
if(temp ==0)
break;
int part = (int)(temp % 10000);
parts[i] = part;
numParts ++;
temp = temp / 10000;
}

boolean beforeWanIsZero = true; // 标志“万”下面一级是不是 0

String chineseStr = "";
for(int i=0; i<numParts; i++) {

String partChinese = partTranslate(parts[i]);
if(i % 2 == 0) {
if("".equals(partChinese))
beforeWanIsZero = true;
else
beforeWanIsZero = false;
}

if(i != 0) {
if(i % 2 == 0)
chineseStr = "亿" + chineseStr;
else {
if("".equals(partChinese) && !beforeWanIsZero) // 如果“万”对应的 part 为 0，而“万”下面一级不为 0，则不加“万”，而加“零”
chineseStr = "零" + chineseStr;
else {
if(parts[i-1] < 1000 && parts[i-1] > 0) // 如果"万"的部分不为 0, 而"万"前面的部分小于 1000 大于 0， 则万后面应该跟“零”
chineseStr = "零" + chineseStr;
chineseStr = "万" + chineseStr;
}
}
}
chineseStr = partChinese + chineseStr;
}

if("".equals(chineseStr)) // 整数部分为 0, 则表达为"零元"
chineseStr = chineseDigits[0];
else if(negative) // 整数部分不为 0, 并且原金额为负数
chineseStr = "负" + chineseStr;

chineseStr = chineseStr + "元";

if(numFen == 0 && numJiao == 0) {
chineseStr = chineseStr + "整";
}
else if(numFen == 0) { // 0 分，角数不为 0
chineseStr = chineseStr + chineseDigits[numJiao] + "角";
}
else { // “分”数不为 0
if(numJiao == 0)
chineseStr = chineseStr + "零" + chineseDigits[numFen] + "分";
else
chineseStr = chineseStr + chineseDigits[numJiao] + "角" + chineseDigits[numFen] + "分";
}

return chineseStr;

}

/**
* 把一个 0~9999 之间的整数转换为汉字的字符串，如果是 0 则返回 ""
* @param amountPart
* @return
*/
private static String partTranslate(int amountPart) {

if(amountPart < 0 || amountPart > 10000) {
throw new IllegalArgumentException("参数必须是大于等于 0，小于 10000 的整数！");
}

String[] units = new String[] {"", "拾", "佰", "仟"};

int temp = amountPart;

String amountStr = new Integer(amountPart).toString();
int amountStrLength = amountStr.length();
boolean lastIsZero = true; //在从低位往高位循环时，记录上一位数字是不是 0
String chineseStr = "";

for(int i=0; i<amountStrLength; i++) {
if(temp == 0) // 高位已无数据
break;
int digit = temp % 10;
if(digit == 0) { // 取到的数字为 0
if(!lastIsZero) //前一个数字不是 0，则在当前汉字串前加“零”字;
chineseStr = "零" + chineseStr;
lastIsZero = true;
}
else { // 取到的数字不是 0
chineseStr = chineseDigits[digit] + units[i] + chineseStr;
lastIsZero = false;
}
temp = temp / 10;
}
return chineseStr;
}

public static void main(String[] args) {

if(args.length == 0) {
System.out.println("转换演示：");
System.out.println("-------------------------");
System.out.println("25000000000005.999: " + amountToChinese(25000000000005.999));
System.out.println("45689263.626: " + amountToChinese(45689263.626));
System.out.println("0.69457: " + amountToChinese(0.69457));
System.out.println("253.0: " + amountToChinese(253.0));
System.out.println("0: " + amountToChinese(0));
System.out.println("-------------------------");
System.out.println("本程序用法：");
System.out.println(" 演示： java MoneyUtil");
System.out.println(" 转换指定数字：java MoneyUtil [要转换的数字]");
//System.out.println(Long.MAX_VALUE);
//System.out.println(Long.MIN_VALUE);
}
else {
System.out.println("转换结果：");
System.out.println(args[0] + ": " + amountToChinese(Double.parseDouble(args[0])));
}

}

}