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package com.luoo.user.util;
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import java.io.UnsupportedEncodingException;
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import java.net.URLDecoder;
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import java.net.URLEncoder;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class EmojiConverterUtil {
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private static final String encodePatternString = "([\\x{10000}-\\x{10ffff}\ud800-\udfff])";
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private static final Pattern encodePattern = Pattern.compile(encodePatternString);
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private static final String decodePatternString = "\\[\\[(.*?)\\]\\]";
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private static final Pattern decodePattern = Pattern.compile(decodePatternString);
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/**
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* @Description 将字符串中的emoji表情转换成可以在utf-8字符集数据库中保存的格式(表情占4个字节,需要utf8mb4字符集)
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* @param str 待转换字符串
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* @return 转换后字符串
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* @throws UnsupportedEncodingException exception
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*/
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public static String encode(String str) {
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if (null == str) {
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return null;
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}
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Matcher matcher = encodePattern.matcher(str);
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StringBuffer sb = new StringBuffer();
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while (matcher.find()) {
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try {
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matcher.appendReplacement(sb, "[[" + URLEncoder.encode(matcher.group(1), "UTF-8") + "]]");
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} catch (UnsupportedEncodingException e) {
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}
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}
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matcher.appendTail(sb);
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return sb.toString();
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}
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/**
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* @Description 还原utf8数据库中保存的含转换后emoji表情的字符串
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* @param str 转换后的字符串
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* @return 转换前的字符串 exception
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*/
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public static String decode(String str) {
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if (null == str) {
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return null;
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}
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Matcher matcher = decodePattern.matcher(str);
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StringBuffer sb = new StringBuffer();
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while (matcher.find()) {
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try {
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matcher.appendReplacement(sb, URLDecoder.decode(matcher.group(1), "UTF-8"));
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} catch (UnsupportedEncodingException e) {
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}
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}
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matcher.appendTail(sb);
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return sb.toString();
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}
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}
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