[SCB-2616] Remove redundant character escape in CseUriTemplateHandler (#3149)

diff --git a/providers/provider-springmvc/src/main/java/org/apache/servicecomb/provider/springmvc/reference/CseUriTemplateHandler.java b/providers/provider-springmvc/src/main/java/org/apache/servicecomb/provider/springmvc/reference/CseUriTemplateHandler.java
index ecc5ff7..f41d649 100644
--- a/providers/provider-springmvc/src/main/java/org/apache/servicecomb/provider/springmvc/reference/CseUriTemplateHandler.java
+++ b/providers/provider-springmvc/src/main/java/org/apache/servicecomb/provider/springmvc/reference/CseUriTemplateHandler.java
@@ -43,11 +43,11 @@
 
   private static final String HOST_IPV4_PATTERN = "[^\\[/?#:]*";
 
-  private static final String HOST_IPV6_PATTERN = "\\[[\\p{XDigit}\\:\\.]*[%\\p{Alnum}]*\\]";
+  private static final String HOST_IPV6_PATTERN = "\\[[\\p{XDigit}:.]*[%\\p{Alnum}]*]";
 
   private static final String HOST_PATTERN = "(" + HOST_IPV6_PATTERN + "|" + HOST_IPV4_PATTERN + ")";
 
-  private static final String PORT_PATTERN = "(\\d*(?:\\{[^/]+?\\})?)";
+  private static final String PORT_PATTERN = "(\\d*(?:\\{[^/]+?})?)";
 
   private static final String PATH_PATTERN = "([^?#]*)";