Java学习笔记27 将数字转换为中文…

//将命令行输入得纯数字转换为中文大写

public class CapitalToChinese 

{

public static StringBuffer buffer = newStringBuffer();//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)

{

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);

}

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);

}

}

//ArrayList<String> list = newArrayList<String>();

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

{

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

{

continue;

}

k = i;

break;

}

if(k == -1)

{

System.out.println("零");

System.exit(0);

}

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);

}

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;

}

}