package com.sinata.zuul.util;
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import org.apache.commons.lang.StringUtils;
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public class StringUtil {
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/**
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* 判断字符串中是否包含表情
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* @param source
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* @return
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*/
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public static boolean containsEmoji(String source) {
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int len = 0;
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if(null != source){
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len = source.length();
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}
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boolean isEmoji = false;
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for (int i = 0; i < len; i++) {
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char hs = source.charAt(i);
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if (0xd800 <= hs && hs <= 0xdbff) {
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if (source.length() > 1) {
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char ls = source.charAt(i + 1);
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int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
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if (0x1d000 <= uc && uc <= 0x1f77f) {
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return true;
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}
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}
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} else {
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// non surrogate
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if (0x2100 <= hs && hs <= 0x27ff && hs != 0x263b) {
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return true;
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} else if (0x2B05 <= hs && hs <= 0x2b07) {
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return true;
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} else if (0x2934 <= hs && hs <= 0x2935) {
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return true;
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} else if (0x3297 <= hs && hs <= 0x3299) {
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return true;
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} else if (hs == 0xa9 || hs == 0xae || hs == 0x303d
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|| hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c
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|| hs == 0x2b1b || hs == 0x2b50 || hs == 0x231a) {
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return true;
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}
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if (!isEmoji && source.length() > 1 && i < source.length() - 1) {
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char ls = source.charAt(i + 1);
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if (ls == 0x20e3) {
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return true;
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}
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}
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}
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}
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return isEmoji;
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}
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/**
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* 判断某个字符是不是表情
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* @param codePoint
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* @return
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*/
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private static boolean isEmojiCharacter(char codePoint) {
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return (codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA)
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|| (codePoint == 0xD)
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|| ((codePoint >= 0x20) && (codePoint <= 0xD7FF))
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|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))
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|| ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));
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}
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/**
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* 过滤掉字符串中的表情
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* @param source
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* @return
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*/
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public static String filterEmoji(String source) {
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if (StringUtils.isBlank(source)) {
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return source;
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}
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StringBuilder buf = null;
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int len = source.length();
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for (int i = 0; i < len; i++) {
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char codePoint = source.charAt(i);
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if (isEmojiCharacter(codePoint)) {
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if (buf == null) {
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buf = new StringBuilder(source.length());
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}
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buf.append(codePoint);
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}
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}
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if (buf == null) {
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return source;
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} else {
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if (buf.length() == len) {
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buf = null;
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return source;
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} else {
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return buf.toString();
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}
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}
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}
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/**
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* 判断字符串为空
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* @param value
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* @return
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*/
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public static boolean isEmpty(String value){
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if(null == value || value.trim().equals("")){
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return true;
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}
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return false;
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}
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/**
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* 判断字符串非空
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* @param value
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* @return
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*/
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public static boolean isNotEmpty(String value){
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return !isEmpty(value);
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}
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}
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