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问题描述：
在日常生活中，我们经常会将阿拉伯数字转化为中文大写的情况："零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖", "拾", "佰", "仟", "万", "亿"，因此自己就编写一个类，实现该功能的转化。
实现过程：
对于这个问题的实现，我们首先把数字按四位一个拆开（符合我们读数字的习惯），然后对这四位数，做出他的读法，具体代码如下：
private static String getNumberStr1000 (int num) {if (num > 9999 || num < 0) {return "";}int q = num / 1000;int b = (num / 100) % 10;int s = (num / 10) % 10;int g = num % 10;StringBuffer sb = new StringBuffer();//千if (q > 0) {sb.append(NUMBER1[q]);sb.append(NUMBER2[3]);}//百if (b > 0) {sb.append(NUMBER1[b]);sb.append(NUMBER2[2]);} else {if (q != 0) {sb.append(NUMBER2[0]);}}//十if (s > 0) {sb.append(NUMBER1[s]);sb.append(NUMBER2[1]);} else {if (b != 0) {sb.append(NUMBER2[0]);}}//个if (g > 0) {sb.append(NUMBER1[g]);} return sb.toString();}
下面我们只需要在编写一个方法，实现每个四位数的读法以及对应的单位即可，具体代码如下：
public static String getNumberStr(int num) {if (num < 0) {return "";}if (num == 0) {return NUMBER1[0];}int split = 10000;int y = num / (split * split);int w = (num / split) % split;int g = num % split;StringBuffer sb = new StringBuffer();//亿if (y > 0) {sb.append(getNumberStr1000(y));sb.append(NUMBER2[5]);}//万if (w > 999) {sb.append(getNumberStr1000(w));sb.append(NUMBER2[4]);} else {if (w > 0) {if (y != 0) {sb.append(NUMBER2[0]);}sb.append(getNumberStr1000(w));sb.append(NUMBER2[4]);}}//万以下if (g > 0) {if (w != 0) {if (g > 999) {sb.append(getNumberStr1000(g));} else {sb.append(NUMBER2[0]);sb.append(getNumberStr1000(g));}} else {if (y != 0) {sb.append(NUMBER2[0]);}sb.append(getNumberStr1000(g));}}return sb.toString();}
完整源代码：
/** *@Description:*/ package com.lulei.util; public class NumberUtil {private static String[] NUMBER1 = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};private static String[] NUMBER2 = {"零", "拾", "佰", "仟", "万", "亿"};/*** @param num* @return* @Author:lulei * @Description:将数字转化为大写*/public static String getNumberStr(int num) {if (num < 0) {return "";}if (num == 0) {return NUMBER1[0];}int split = 10000;int y = num / (split * split);int w = (num / split) % split;int g = num % split;StringBuffer sb = new StringBuffer();//亿if (y > 0) {sb.append(getNumberStr1000(y));sb.append(NUMBER2[5]);}//万if (w > 999) {sb.append(getNumberStr1000(w));sb.append(NUMBER2[4]);} else {if (w > 0) {if (y != 0) {sb.append(NUMBER2[0]);}sb.append(getNumberStr1000(w));sb.append(NUMBER2[4]);}}//万以下if (g > 0) {if (w != 0) {if (g > 999) {sb.append(getNumberStr1000(g));} else {sb.append(NUMBER2[0]);sb.append(getNumberStr1000(g));}} else {if (y != 0) {sb.append(NUMBER2[0]);}sb.append(getNumberStr1000(g));}}return sb.toString();}/*** @param num* @return* @Author:lulei * @Description:对万以下的数字进行大小写转化*/private static String getNumberStr1000 (int num) {if (num > 9999 || num < 0) {return "";}int q = num / 1000;int b = (num / 100) % 10;int s = (num / 10) % 10;int g = num % 10;StringBuffer sb = new StringBuffer();//千if (q > 0) {sb.append(NUMBER1[q]);sb.append(NUMBER2[3]);}//百if (b > 0) {sb.append(NUMBER1[b]);sb.append(NUMBER2[2]);} else {if (q != 0) {sb.append(NUMBER2[0]);}}//十if (s > 0) {sb.append(NUMBER1[s]);sb.append(NUMBER2[1]);} else {if (b != 0) {sb.append(NUMBER2[0]);}}//个if (g > 0) {sb.append(NUMBER1[g]);} return sb.toString();}public static void main(String[] args) {// TODO Auto-generated method stub int i = 1;System.out.println(i + "--" + NumberUtil.getNumberStr(i));i = 1001;System.out.println(i + "--" + NumberUtil.getNumberStr(i));i = 100101;System.out.println(i + "--" + NumberUtil.getNumberStr(i));i = 10100101;System.out.println(i + "--" + NumberUtil.getNumberStr(i));i = 1234567890;System.out.println(i + "--" + NumberUtil.getNumberStr(i));}}
测试运行结果：
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小福利
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