【fix sonar】UserTokenContext文件

jero-boot/jero-boot-base/jero-boot-base-tools/src/main/java/com/jero/common/config/mqtoken/UserTokenContext.java

@@ -7,11 +7,12 @@ package com.jero.common.config.mqtoken;
  */
 public class UserTokenContext {
 
-    private static ThreadLocal<String> userToken = new ThreadLocal<String>();
+    private UserTokenContext(){
 
-    public UserTokenContext() {
     }
 
+    private static ThreadLocal<String> userToken = new ThreadLocal<>();
+
     public static String getToken(){
         return userToken.get();
     }
@@ -19,4 +20,8 @@ public class UserTokenContext {
     public static void setToken(String token){
         userToken.set(token);
     }
+
+    public static void delToken(){
+        userToken.remove();
+    }
 }