package com.stylefeng.guns.core.util;

import java.util.Random;

/***
 * 
 * 得到中文首字母
 * 
 * @author lxm_09
 * 
 */

public class PingYinUtil {

	public static void main(String[] args) {
		String str = "这是一个测试";
		System.out.println("中文首字母：" + getPYIndexStr(str, true));
	}

	/**
	 * 返回首字母
	 */
	public static String getPYIndexStr(String strChinese, boolean bUpCase) {
		try {
			StringBuffer buffer = new StringBuffer();
			byte b[] = strChinese.getBytes("GBK");// 把中文转化成byte数组
			for (int i = 0; i < b.length; i++) {
				if ((b[i] & 255) > 128) {
					int char1 = b[i++] & 255;
					char1 <<= 8;// 左移运算符用“<<”表示，是将运算符左边的对象，向左移动运算符右边指定的位数，并且在低位补零。其实，向左移n位，就相当于乘上2的n次方
					int chart = char1 + (b[i] & 255);
					buffer.append(getPYIndexChar((char) chart, bUpCase));
					continue;
				}
				char c = (char) b[i];
				if (!Character.isJavaIdentifierPart(c))// 确定指定字符是否可以是 Java
														// 标识符中首字符以外的部分。
					c = 'A';
				buffer.append(c);
			}
			return buffer.toString();
		} catch (Exception e) {
			System.out.println((new StringBuilder()).append("\u53D6\u4E2D\u6587\u62FC\u97F3\u6709\u9519")
					.append(e.getMessage()).toString());
		}
		return null;
	}

	/**
	 * 得到首字母
	 */
	private static char getPYIndexChar(char strChinese, boolean bUpCase) {

		int charGBK = strChinese;

		char result;

		if (charGBK >= 45217 && charGBK <= 45252)

			result = 'A';

		else

		if (charGBK >= 45253 && charGBK <= 45760)

			result = 'B';

		else

		if (charGBK >= 45761 && charGBK <= 46317)

			result = 'C';

		else

		if (charGBK >= 46318 && charGBK <= 46825)

			result = 'D';

		else

		if (charGBK >= 46826 && charGBK <= 47009)

			result = 'E';

		else

		if (charGBK >= 47010 && charGBK <= 47296)

			result = 'F';

		else

		if (charGBK >= 47297 && charGBK <= 47613)

			result = 'G';

		else

		if (charGBK >= 47614 && charGBK <= 48118)

			result = 'H';

		else

		if (charGBK >= 48119 && charGBK <= 49061)

			result = 'J';

		else

		if (charGBK >= 49062 && charGBK <= 49323)

			result = 'K';

		else

		if (charGBK >= 49324 && charGBK <= 49895)

			result = 'L';

		else

		if (charGBK >= 49896 && charGBK <= 50370)

			result = 'M';

		else

		if (charGBK >= 50371 && charGBK <= 50613)

			result = 'N';

		else

		if (charGBK >= 50614 && charGBK <= 50621)

			result = 'O';

		else

		if (charGBK >= 50622 && charGBK <= 50905)

			result = 'P';

		else

		if (charGBK >= 50906 && charGBK <= 51386)

			result = 'Q';

		else

		if (charGBK >= 51387 && charGBK <= 51445)

			result = 'R';

		else

		if (charGBK >= 51446 && charGBK <= 52217)

			result = 'S';

		else

		if (charGBK >= 52218 && charGBK <= 52697)

			result = 'T';

		else

		if (charGBK >= 52698 && charGBK <= 52979)

			result = 'W';

		else

		if (charGBK >= 52980 && charGBK <= 53688)

			result = 'X';

		else

		if (charGBK >= 53689 && charGBK <= 54480)

			result = 'Y';

		else

		if (charGBK >= 54481 && charGBK <= 55289)

			result = 'Z';

		else

			result = (char) (65 + (new Random()).nextInt(25));

		if (!bUpCase)

			result = Character.toLowerCase(result);

		return result;

	}

}