diff --git a/src/main/java/com/power/doc/filter/BoxReturnFilter.java b/src/main/java/com/power/doc/filter/BoxReturnFilter.java
index c5f5e26..d877a0e 100644
--- a/src/main/java/com/power/doc/filter/BoxReturnFilter.java
+++ b/src/main/java/com/power/doc/filter/BoxReturnFilter.java
@@ -26,8 +26,8 @@ public class BoxReturnFilter implements ReturnTypeFilter {
 
     @Override
     public ApiReturn doFilter(String fullyName) {
-        ApiReturn apiReturn = new ApiReturn();
         if (TYPE_SET.stream().anyMatch(fullyName::startsWith)) {
+            ApiReturn apiReturn = new ApiReturn();
             if (fullyName.contains("<")) {
                 String[] strings = DocClassUtil.getSimpleGicName(fullyName);
                 String newFullName = strings[0];
@@ -42,9 +42,9 @@ public class BoxReturnFilter implements ReturnTypeFilter {
                 //directly return Java Object
                 apiReturn.setGenericCanonicalName(DocGlobalConstants.JAVA_OBJECT_FULLY);
                 apiReturn.setSimpleName(DocGlobalConstants.JAVA_OBJECT_FULLY);
-                return apiReturn;
             }
+            return apiReturn;
         }
-        return apiReturn;
+        return null;
     }
 }
diff --git a/src/main/java/com/power/doc/filter/DefaultReturnFilter.java b/src/main/java/com/power/doc/filter/DefaultReturnFilter.java
index c93a838..82fd676 100644
--- a/src/main/java/com/power/doc/filter/DefaultReturnFilter.java
+++ b/src/main/java/com/power/doc/filter/DefaultReturnFilter.java
@@ -3,6 +3,7 @@ package com.power.doc.filter;
 import com.power.doc.model.ApiReturn;
 
 /**
+ * must be put last
  * @author yu 2020/4/17.
  */
 public class DefaultReturnFilter implements ReturnTypeFilter {
diff --git a/src/main/java/com/power/doc/filter/ReturnTypeProcessor.java b/src/main/java/com/power/doc/filter/ReturnTypeProcessor.java
index 858e525..99b886d 100644
--- a/src/main/java/com/power/doc/filter/ReturnTypeProcessor.java
+++ b/src/main/java/com/power/doc/filter/ReturnTypeProcessor.java
@@ -4,6 +4,7 @@ import com.power.doc.model.ApiReturn;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * @author yu 2020/4/17.
@@ -29,6 +30,9 @@ public class ReturnTypeProcessor {
         ApiReturn apiReturn = null;
         for (ReturnTypeFilter filter : filters) {
             apiReturn = filter.doFilter(typeName);
+            if (Objects.nonNull(apiReturn)) {
+                return apiReturn;
+            }
         }
         return apiReturn;
     }
diff --git a/src/main/java/com/power/doc/filter/WebFluxReturnFilter.java b/src/main/java/com/power/doc/filter/WebFluxReturnFilter.java
index 94d4336..bdbe816 100644
--- a/src/main/java/com/power/doc/filter/WebFluxReturnFilter.java
+++ b/src/main/java/com/power/doc/filter/WebFluxReturnFilter.java
@@ -10,16 +10,16 @@ public class WebFluxReturnFilter implements ReturnTypeFilter {
 
     @Override
     public ApiReturn doFilter(String fullyName) {
-        ApiReturn apiReturn = new ApiReturn();
         //support web flux
         if (fullyName.startsWith("reactor.core.publisher.Flux")) {
+            ApiReturn apiReturn = new ApiReturn();
             // rewrite type name
             fullyName = fullyName.replace("reactor.core.publisher.Flux", DocGlobalConstants.JAVA_LIST_FULLY);
             apiReturn.setGenericCanonicalName(fullyName);
             apiReturn.setSimpleName(DocGlobalConstants.JAVA_LIST_FULLY);
             return apiReturn;
         }
-        return apiReturn;
+        return null;
     }
 
 }
diff --git a/src/main/java/com/power/doc/utils/DocUtil.java b/src/main/java/com/power/doc/utils/DocUtil.java
index e147aeb..49e57a8 100644
--- a/src/main/java/com/power/doc/utils/DocUtil.java
+++ b/src/main/java/com/power/doc/utils/DocUtil.java
@@ -356,7 +356,8 @@ public class DocUtil {
      */
     public static Map<String, String> getFieldTagsValue(final JavaField field) {
         List<DocletTag> paramTags = field.getTags();
-        return paramTags.stream().collect(Collectors.toMap(DocletTag::getName, DocletTag::getValue));
+        return paramTags.stream().collect(Collectors.toMap(DocletTag::getName, DocletTag::getValue,
+                (key1, key2) -> key1 + "," + key2));
     }
 
     /**