feat：增加默认值的写入

flyfish-common/src/main/java/com/flyfish/framework/utils/StringHelper.java

@@ -1,6 +1,7 @@
 package com.flyfish.framework.utils;
 
 import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.lang3.StringUtils;
 
 import java.util.Collection;
 import java.util.function.Function;
@@ -15,6 +16,7 @@ public class StringHelper {
 
     /**
      * 获取对象的值
+     *
      * @param obj 对象
      * @return 结果
      */
@@ -24,14 +26,15 @@ public class StringHelper {
 
     /**
      * 快速的join一个集合
+     *
      * @param collection 集合
-     * @param mapper 映射
-     * @param <T> 泛型
+     * @param mapper     映射
+     * @param <T>        泛型
      * @return 结果
      */
     public static <T> String join(Collection<T> collection, Function<T, String> mapper) {
         if (CollectionUtils.isNotEmpty(collection)) {
-            return collection.stream().map(mapper).collect(Collectors.joining(","));
+            return collection.stream().map(mapper).filter(StringUtils::isNoneBlank).collect(Collectors.joining(","));
         }
         return "";
     }