Spring 启动+ thymeleaf : get logged in user

Question

我想知道如何从 Thymeleaf 获取 User 对象。目前我正在调用我的 userService，它将从数据库获取用户。我不喜欢这种方法，因为每次调用都会进行数据库查询。

是否可以从内存中获取用户？

<link href="/css/style2.css"
    th:if="${@commanderService.getCurrentCommander()} and
        ${@commanderService.getCurrentCommander().settings == 'template=1'}" 
    rel="stylesheet" type="text/css" />

指挥官服务:

public Commander getCurrentCommander() {
    Object principal = 
        SecurityContextHolder.getContext().getAuthentication().getPrincipal();
    Commander commander = findByName((String)principal);

    return commander;
}

Answer 1

如果您使用 Spring Security 和 thymeleaf，您可以检查: https://github.com/thymeleaf/thymeleaf-extras-springsecurity3
例如:

<div sec:authentication="name">
    The value of the "name" property of the authentication object should appear here.
</div> 

<div sec:authorize="hasRole('ROLE_ADMIN')">
    This content is only shown to administrators.
</div>