java编写的转换数字为中文大写的源码

package com;

//将命令行输入得纯数字转换为中文大写

public class CapitalToChinese

{

public static StringBuffer buffer = new StringBuffer();//存储数字转换为中文大写的变长字符串

public static int k = -1;//非零数字开始的位置

public static void main(String[] args)

{

/**

* 有空格即结束程序

*/

if(args.length > 1)

{

System.out.println("用户输入的字符不都为数字，无法转换");

System.exit(0);

}

/**

* 将字符串转换为字符数组；当不全为数字时，结束程序

*/

char[] array = new char[args[0].length()];

args[0].getChars(0,args[0].length(), array, 0);

for(char arr : array)

{

if(arr < '0' || arr > '9')

{

System.out.println("用户输入的字符不都为数字，无法转换");

System.exit(0);

}

}

/**

* 将array数组中遇到的第一个非零数字，赋值给k

*/

//ArrayList list = new ArrayList();

for(int i = 0; i < array.length; i++)

{

if('0' == array[i])

{

continue;

}

k = i;

break;

}

/**

* 输入全是0时，直接输出零，结束程序

*/

if(k == -1)

{

System.out.println("零");

System.exit(0);

}

/**

* 将非零开始的数字专为中文大写

*/

CapitalToChinese chin = new CapitalToChinese();

int n = array.length - k;//数字所在的数位

chin.change(array[k],'0', n,true);

for(; k < array.length - 1; k++)

{

n = array.length - k - 1;

chin.change(array[k + 1],array[k], n,false);

}

System.out.println(buffer);

}

/**

*

* @param ch每一位的数字

* @param last，ch的前一位数字

* @param n数字所在的数位

* @param m是否是数字的非零第一位

*/

private void change(char ch,char last, int n,boolean m) {

if(true == m)

{

switch(n)

{

case 1:buffer.append(finger(ch));return;

case 2:buffer.append(finger(ch) + "十");return;

case 3:buffer.append(finger(ch) + "百");return;

case 4:buffer.append(finger(ch) + "千");return;

case 5:buffer.append(finger(ch) + "万");return;

case 6:buffer.append(finger(ch) + "十");return;

case 7:buffer.append(finger(ch) + "百");return;

case 8:buffer.append(finger(ch) + "千");return;

}

return;

}

if('0' == last)

{

if('0' == ch)

{

return;

}

switch(n)

{

case 1:buffer.append("零" + finger(ch));return;

case 2:buffer.append("零" + finger(ch) + "十");return;

case 3:buffer.append("零" + finger(ch) + "百");return;

case 4:buffer.append("零" + finger(ch) + "千");return;

case 5:buffer.append("零" + finger(ch) + "万");return;

case 6:buffer.append("零" + finger(ch) + "十");return;

case 7:buffer.append("零" + finger(ch) + "百");return;

case 8:buffer.append("零" + finger(ch) + "千");return;

}

}

if('0' != last)

{

if('0' == ch)

{

return;

}

switch(n)

{

case 1:buffer.append(finger(ch));return;

case 2:buffer.append(finger(ch) + "十");return;

case 3:buffer.append(finger(ch) + "百");return;

case 4:buffer.append(finger(ch) + "千");return;

case 5:buffer.append(finger(ch) + "万");return;

case 6:buffer.append(finger(ch) + "十");return;

case 7:buffer.append(finger(ch) + "百");return;

case 8:buffer.append(finger(ch) + "千");return;

}

}

return;

}

private static String finger(char ch) {

switch(ch)

{

case '0': return "零";

case '1': return "一";

case '2': return "二";

case '3': return "三";

case '4': return "四";

case '5': return "五";

case '6': return "六";

case '7': return "七";

case '8': return "八";

case '9': return "九";

}

return null;

}

}