add log

src/main/java/cn/quantgroup/xyqb/util/EmojiUtil.java

 package cn.quantgroup.xyqb.util;
 
-import java.util.regex.Matcher;
+
 import java.util.regex.Pattern;
 
 /**
@@ -8,15 +8,10 @@ import java.util.regex.Pattern;
  * 过滤emoji表情
  */
 public class EmojiUtil {
+
+    private static final Pattern EMOJI = Pattern.compile("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]");
+
     public static String filter(String str) {
-        if(str.trim().isEmpty()){
-            return str;
-        }
-        String pattern="[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]";
-        String reStr="";
-        Pattern emoji=Pattern.compile(pattern);
-        Matcher emojiMatcher=emoji.matcher(str);
-        str=emojiMatcher.replaceAll(reStr);
-        return str;
+        return str == null || str.trim().isEmpty() ? str : EMOJI.matcher(str).replaceAll("");
     }
 }