moneyutil.java

本程序是J2EE的实验

package com.tag;

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("0: " + amountToChinese(0)); 
			System.out.println("-------------------------"); 

		} 
		else { 
			System.out.println("转换结果："); 
			System.out.println(args[0] + ": " + amountToChinese(Double.parseDouble(args[0]))); 
		} 

	} */

}