检测字符串中是否包含汉字；检测字符串中只能包含：中文、数字、下划线(_)、横线(-)

public static boolean checkChinese(String sequence) {
        final String format = "[\u4E00-\u9FA5\uF900-\uFA2D]";
        boolean result = false;
        Pattern pattern = Pattern.compile(format);
        Matcher matcher = pattern.matcher(sequence);
        result = matcher.find();
        return result;
    }

 public static boolean checkNickname(String sequence) {
        final String format = "[^\u4E00-\u9FA5\uF900-\uFA2D\w-_]";
        Pattern pattern = Pattern.compile(format);
        Matcher matcher = pattern.matcher(sequence);
        return !matcher.find();
    }