update code for java sdk support china serverless milvus connect. (#711)

Signed-off-by: “yelusion” <xun.huang@zilliz.com>

src/main/java/io/milvus/common/constant/MilvusClientConstant.java

@@ -7,7 +7,7 @@ public class MilvusClientConstant {
 
         public final static String HOST_HTTP_PREFIX = "http://";
 
-        public final static String CLOUD_SERVERLESS_URI_REGEX = "^https://in03-.{20,}zilliz.*.com$";
+        public final static String CLOUD_SERVERLESS_URI_REGEX = "^https://in03-.{20,}zilliz.*.(com|cn)$";
     }
     public static class StringValue {
         public final static String COLON = ":";