diff --git a/urls.md b/urls.md
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+++ b/urls.md
@@ -38,4 +38,6 @@
 
 18.[JAVA发送GET、POST请求，携带请求头，接收解析返回值(通过URL)](https://blog.csdn.net/HezhezhiyuLe/article/details/92395041)
 
-19. [SpringBoot设置动态定时任务](blog.csdn.net/wl_Honest/article/details/123654621)
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+19. [SpringBoot设置动态定时任务](blog.csdn.net/wl_Honest/article/details/123654621)
+
+20. [java取n个工作日后的日期](https://www.cnblogs.com/yadongliang/p/9549349.html)
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