Java判断字符串是否含有乱码

灰太狼 2022-04-17 02:46 264阅读 0赞

from [http://blog.icoolxue.com/java-to-determine-whether-a-string-is-garbled-pro-testing-available/][http_blog.icoolxue.com_java-to-determine-whether-a-string-is-garbled-pro-testing-available]

/**
         * 判断字符是否是中文
         *
         * @param c 字符
         * @return 是否是中文
         */
        public static boolean isChinese(char c) {
            Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
            if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
                    || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
                    || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
                    || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
                    || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
                    || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
                return true;
            }
            return false;
        }
    
        /**
         * 判断字符串是否是乱码
         *
         * @param strName 字符串
         * @return 是否是乱码
         */
        public static boolean isMessyCode(String strName) {
            Pattern p = Pattern.compile("\s*|t*|r*|n*");
            Matcher m = p.matcher(strName);
            String after = m.replaceAll("");
            String temp = after.replaceAll("\p{P}", "");
            char[] ch = temp.trim().toCharArray();
            float chLength = ch.length;
            float count = 0;
            for (int i = 0; i < ch.length; i++) {
                char c = ch[i];
                if (!Character.isLetterOrDigit(c)) {
                    if (!isChinese(c)) {
                        count = count + 1;
                    }
                }
            }
            float result = count / chLength;
            if (result > 0.4) {
                return true;
            } else {
                return false;
            }
    
        }
    
        public static void main(String[] args) {
            System.out.println(isMessyCode("Ã©Å¸Â©Ã©Â¡ÂºÃ¥Â¹Â³"));
            System.out.println(isMessyCode("你好"));
        }

[http_blog.icoolxue.com_java-to-determine-whether-a-string-is-garbled-pro-testing-available]: http://blog.icoolxue.com/java-to-determine-whether-a-string-is-garbled-pro-testing-available/