diff --git a/commons/common-util/src/main/java/com/schbrain/common/util/StreamUtils.java b/commons/common-util/src/main/java/com/schbrain/common/util/StreamUtils.java
index b80ce58fb43aa0bb8d166d642b089f5c4ba98489..533f0389ad71bd5b5162ddedda0a0da947f062cb 100644
--- a/commons/common-util/src/main/java/com/schbrain/common/util/StreamUtils.java
+++ b/commons/common-util/src/main/java/com/schbrain/common/util/StreamUtils.java
@@ -158,15 +158,11 @@ public class StreamUtils {
     }
 
     public static <T> String join(Iterable<T> data, String delimiter) {
-        return join(data, delimiter, Objects::toString, any -> true);
+        return join(data, delimiter, Objects::toString);
     }
 
-    public static <T> String join(Iterable<T> data, String delimiter, Predicate<String> predicate) {
-        return join(data, delimiter, Objects::toString, predicate);
-    }
-
-    public static <T> String join(Iterable<T> data, String delimiter, Function<T, String> toStringFunction, Predicate<String> predicate) {
-        return from(data).map(toStringFunction).filter(predicate).collect(joining(delimiter));
+    public static <T> String join(Iterable<T> data, String delimiter, Function<T, String> toStringFunction) {
+        return from(data).map(toStringFunction).collect(joining(delimiter));
     }
 
     public static List<String> split(String data) {
diff --git a/commons/web-common/src/main/java/com/schbrain/common/web/support/signature/AbstractSignatureValidationInterceptor.java b/commons/web-common/src/main/java/com/schbrain/common/web/support/signature/AbstractSignatureValidationInterceptor.java
index 3adc65160d7c16e54fb8184654108e8b7ea0a4c7..6ba0e2869d60eafa92514ef94ca57b052058a6aa 100644
--- a/commons/web-common/src/main/java/com/schbrain/common/web/support/signature/AbstractSignatureValidationInterceptor.java
+++ b/commons/web-common/src/main/java/com/schbrain/common/web/support/signature/AbstractSignatureValidationInterceptor.java
@@ -10,6 +10,7 @@ import org.springframework.web.util.ContentCachingRequestWrapper;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Objects;
 
 import static cn.hutool.core.text.StrPool.UNDERLINE;
@@ -68,7 +69,8 @@ public abstract class AbstractSignatureValidationInterceptor<T extends Signature
     }
 
     protected String signParams(String requestUri, String queryString, String bodyString, String timestamp, String appKey, String appSecret) {
-        String toSign = StreamUtils.join(Arrays.asList(requestUri, queryString, bodyString, timestamp, appKey, appSecret), UNDERLINE, StringUtils::isNotBlank);
+        List<String> params = StreamUtils.filterToList(Arrays.asList(requestUri, queryString, bodyString, timestamp, appKey, appSecret), StringUtils::isNotBlank);
+        String toSign = StreamUtils.join(params, UNDERLINE);
         return DigestUtil.sha256Hex(toSign);
     }