功能看似简单，但真正实现起来也不是易事

现在贴出代码，欢迎各位幕友提出建议！！

package test01;

import java.util.Scanner;

public class Test {

public static void main(String[] args) {

System.out.println("欢迎使用数字转换器(Designed by chph)！！");

String in;

boolean isRunning = true;

Scanner scanner = new Scanner(System.in);

while (isRunning) {

System.out.println("请输入一串纯整数：");

in = scanner.next();

String input = in.trim();

if (!isNum(input)) {

System.out.println("输入类型错误！！！你应该输入12位以内纯正整数！！！");

continue;

} else {

System.out.println("转换成中文数字为：" + num2Ch(input));

}

System.out.println("是否继续查询？ 1.是 2.不，谢谢");

int isContinue = scanner.nextInt();

if (isContinue == 1) {

continue;

} else if (isContinue == 2) {

System.out.println("程序结束！欢迎下次使用！！！");

isRunning = !isRunning;

} else {

System.out.println("指令输入错误，直接退出！！");

System.out.println("程序结束！欢迎下次使用！！！");

isRunning = !isRunning;

}

}

System.out.println("请输入任意数字退出控制台...");

in = scanner.next();

scanner.close();

}

private static String num2Ch(String input) {

input = Long.parseLong(input) + "";

if (input.equals("0")) {

return "零";

}

// int length = input.length();

// char[] arr1 = { 'O', '一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '百',

// '千', '万', '亿' };

// char[] arr2 = { '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖', '拾', '佰',

// '仟', '万', '亿' };

StringBuffer s = new StringBuffer();

switch (4 - (input.length() % 4)) {

case 1:

s = new StringBuffer("0").append(input);

break;

case 2:

s = new StringBuffer("00").append(input);

break;

case 3:

s = new StringBuffer("000").append(input);

break;

default:

s = new StringBuffer("").append(input);

}

String[] arr = new String[s.length() / 4];

for (int i = 0; i < s.length(); i = i + 4) {

if (i + 4 == s.length())

arr[i / 4] = s.toString().substring(i);

else

arr[i / 4] = s.toString().substring(i, i + 4);

}

StringBuffer output = new StringBuffer("");

switch (s.length() / 4) {

case 3:

output = output.append(trans(arr[s.length() / 4 - 3])).append("亿");

case 2:

if (Integer.parseInt(arr[s.length() / 4 - 2]) == 0 && Integer.parseInt(arr[s.length() / 4 - 3]) != 0)

output = output.append("零");

else

output = output.append(trans(arr[s.length() / 4 - 2])).append("万");

case 1:

output = output.append(trans(arr[s.length() / 4 - 1]));

break;

}

return output.toString();

}

// 四位数转换函数

private static String trans(String string) {

String s = Integer.parseInt(string) + "";

StringBuffer output = new StringBuffer("");

String[] arr = { "", "一", "二", "三", "四", "五", "六", "七", "八", "九" };

// for (int i = 0; i < s.length(); i++) {

// if (s.charAt(i) != 0) {

// s = s.substring(i);

// break;

// }

// }

if ((Integer.parseInt(s) + "").equals("")) {

return "";

} else {

switch (s.length()) {

case 4:

if (Integer.parseInt(string.charAt(0) + "") == 0) {

output = output.append("零");

}else {

output = output.append(arr[Integer.parseInt(s.charAt(0) + "")]).append("千");

}

case 3:

if (Integer.parseInt(string.charAt(3) + "") != 0 && Integer.parseInt(string.charAt(1) + "") == 0 && Integer.parseInt(string.charAt(0) + "") != 0) {

output = output.append("零");

}else {

output = output.append(arr[Integer.parseInt(string.charAt(1) + "")]);

}

if (Integer.parseInt(string.charAt(1) + "") != 0) {

output = output.append("百");

}

case 2:

if (Integer.parseInt(string.charAt(3) + "") != 0 && Integer.parseInt(string.charAt(2) + "") == 0 && Integer.parseInt(string.charAt(1) + "") != 0

&& Integer.parseInt(string.charAt(0) + "") != 0) {

output = output.append("零");

}else{

output = output.append(arr[Integer.parseInt(string.charAt(2) + "")]);

}

if (Integer.parseInt(string.charAt(2) + "") != 0) {

output = output.append("十");

}

case 1:

if (Integer.parseInt(string.charAt(3) + "") != 0) {

output = output.append(arr[Integer.parseInt(string.charAt(3) + "")]);

}

break;

}

return output.toString();

}

}

// 判断是否是纯数字输入

private static boolean isNum(String s) {

String num = "0123456789";

int length = 0;

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

for (int j = 0; j < num.length(); j++) {

if (s.charAt(i) == num.charAt(j)) {

length++;

break;

}

}

}

return (s.trim().length() != 0 && length == s.length() && length <= 12 && length >= 0) ? true : false;

}

}