1：計算String字符串中漢字的個數

private int countChinese(String text) {
        int amount = 0;// 創建統計漢字的計數器
        for (int i = 0; i < text.length(); i++) {// 遍歷字符串每一個字符
            // 使用正則表達式，判斷字符是否為漢字編碼
            boolean matches = Pattern.matches("^[\u4E00-\u9FA5]{0,}$", "" + text.charAt(i));

            if (matches) {//
 
 如果是漢字
                amount++;// 則累加
            }
        }
        return amount;
    }

2：十六進制轉為漢字

public static String hexToStringGBK(String s) {
        byte[] baKeyword = new byte[s.length() / 2];
        for (int i = 0; i < baKeyword.length; i++) {
            try {
                baKeyword[i] 
 
= (byte) (0xff & Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16));
            } catch (Exception e) {
                e.printStackTrace();
                return "";
            }
        }
        try {
            s = new String(baKeyword, "GBK");// UTF-16le:Not
        } catch (Exception e1) {
            e1.printStackTrace();
            
 
return "";
        }
        return s;
    }

1：各種字符轉換