如何使用 Model.addAttribute() 添加的变量作为参数传递给 thymeleaf 的 hasRole 方法？

Question

How can I use the variables that added by Model.addAttribute() to pass as a parameter in hasRole method of thymeleaf?

I try to do like this but it's not working:

In the controller:

String role_Admin = userTags.role.ADMIN.name();
model.addAttribute("role_Admin", role_Admin);

and in the html file where I check authorize to show a message:

<span sec:authorize="${hasRole(${role_Admin})}">admin</span>

and it throws exception:

org.thymeleaf.exceptions.TemplateProcessingException: An error happened trying to parse Spring Security access expression "hasRole(${role_Admin})"

I used:

• spring boot version 2.5.2
• spring-boot-starter-security
• spring-boot-starter-thymeleaf
• thymeleaf-extras-springsecurity5

how can I solve it?

Answer 1

用双下划线包裹 ${role_Admin}。

__${role_Admin}__