过滤非中英文的特殊字符

/**
 * 过滤特殊字符
 * @param str str
 * @return String
 */
public static String filterStr(String str) {
    if (StringUtils.isBlank(str)) {
        return str;
    }
    String regEx = "[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+·|{}【】‘；：”“’。，、？]";
    Pattern p = Pattern.compile(regEx);
    Matcher m = p.matcher(str);
    return m.replaceAll("").trim();
}

过滤表情字符

		<dependency>
			<groupId>com.vdurmont</groupId>
			<artifactId>emoji-java</artifactId>
			<version>3.1.3</version>
		</dependency>

    /**
     * 获取非表情字符串
     *
     * @param input String
     * @return String
     */
    public static String getNonEmojiString(String input) {
        int prev = 0;
        StringBuilder sb = new StringBuilder();
        List<EmojiParser.UnicodeCandidate> replacements = getUnicodeCandidates(input);
        for (EmojiParser.UnicodeCandidate candidate : replacements) {
            sb.append(input.substring(prev, candidate.getEmojiStartIndex()));
            prev = candidate.getFitzpatrickEndIndex();
        }
        return sb.append(input.substring(prev)).toString();
    }

hutool工具的EmojiUtil也是基于emoji-java的Emoji表情工具类实现的

使用

    public static void main(String[] args) {
        System.out.println(filterStr("(*+﹏+*)~@"));
        System.out.println("\uD83D\uDE01");
        System.out.println(cn.hutool.extra.emoji.EmojiUtil.removeAllEmojis("31dfd电饭\uD83D\uDE011231dfd电饭锅"));
        System.out.println(getNonEmojiString("31dfd电饭\uD83D\uDE011231dfd电饭锅"));
    }