JAVA 求中文首字母（大小写）-蒲公英云

JAVA 求中文首字母（大小写）

た入场券 2022-08-23 00:53 238阅读 0赞

从别地方淘来的代码，经测试可用

public class ChinaInitial {
    /**
     * 测试代码
     * 
     * @param args
     */
    public static void main(String[] args) {
        String str = "精英班1401";
        System.out.println("中文首字母：" + getPYIndexStr(str, false));
        //第二个参数为是否大写
    }
    /**
     * 
     * 返回首字母
     * 
     * @param strChinese
     * 
     * @param bUpCase
     * 
     * @return
     */
    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
     * 
     * @param strChinese
     * 
     * @param bUpCase
     * 
     * @return
     */
    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;
    }
}