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I've got a Spring Boot app. From what I understand a boot app will only need the dependency in the pom and all is great. Unfortunately, that's not the case and even when I overcomplicate my configuration it still doesn't work - I can't use the sec namespace in my pages.
In my page the first issue is the namespace URI:
I've tried every option available in the Intellij fix menu and can't get it.
I suppose the result of that issue is the fact that I can't use the sec namespace anywhere. The pictured example may indeed be an invalid use but I've used <div> as well which is straight from the Thymeleaf examples:
Many of the answers here and other sources are relying on xml configuration as well, which is of no use. Still, I've made Java-based beans based on those xml examples with no luck.
What steps are required to use spring security and thymeleaf integration in a spring boot app using only Java based configuration (if that)?
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity4</artifactId>
<version>2.1.2.RELEASE</version>
</dependency>
...
</dependencies>
452
I have encountered the same issue and for me it helped to define schema locations like this:
<html lang="en"
xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.thymeleaf.org http://www.thymeleaf.org
http://www.ultraq.net.nz/thymeleaf/layout http://www.ultraq.net.nz/thymeleaf/layout
http://www.thymeleaf.org/thymeleaf-extras-springsecurity4 http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
...
This includes also additional dialects for layout and spring security 4 which you can remove if you are not using them.
154
answered Jun 05 '26 08:06
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