zhuanzhuanzhuan

epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/StrUtil.java

@@ -1,10 +1,9 @@
 package com.epmet.commons.tools.utils;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import org.apache.commons.lang3.StringUtils;
 
 /**
- * desc:
+ * desc:utf8mb4转为utf8
  *
  * @author: LiuJanJun
  * @date: 2022/7/22 9:45 下午
@@ -12,18 +11,27 @@ import java.util.regex.Pattern;
  */
 public class StrUtil {
 
-    private static final Pattern emoji = Pattern.compile("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]", Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);
+    private static final int LAST_BMP = 0xFFFF;
 
     public static String filterEmoji(String source) {
-
-        if (source != null) {
-            Matcher emojiMatcher = emoji.matcher(source);
-            if (emojiMatcher.find()) {
-                source = emojiMatcher.replaceAll("");
-                return source;
-            }
+        if (StringUtils.isBlank(source)) {
             return source;
         }
-        return source;
+        StringBuilder sb = new StringBuilder(source.length());
+        for (int i = 0; i < source.length(); i++) {
+            int codePoint = source.codePointAt(i);
+            if (codePoint < LAST_BMP) {
+                sb.appendCodePoint(codePoint);
+            } else {
+                i++;
+            }
+        }
+        return sb.toString();
+    }
+
+
+    public static void main(String[] args) {
+        String x = StrUtil.filterEmoji("😀😁😆😅🥹🥹😇😗😀😂666");
+        System.out.println(x);
     }
 }