将字符串传递给 ApplicationAdvice 中的静态图像引用

Question

我有一个 ApplicationAdvice 类，它传递对每个页面上的个人资料图片的引用：

@ControllerAdvice
public class ApplicationAdvice {
...

@ModelAttribute("currentProfilePicture")
    public String currentProfilePicture(Principal principal, Model model) {

        if (principal != null) {
            String currentProfilePicture = "@{/images/default-profile-picture.png}";
            log.info(currentProfilePicture);
            model.addAttribute("currentProfilePicture", currentProfilePicture);
            return currentProfilePicture;
        } else {
            String currentProfilePicture = "@{/images/default-profile-picture.png}";
            log.info(currentProfilePicture);
            model.addAttribute("currentProfilePicture", currentProfilePicture);
            return currentProfilePicture;
        }
    }
}

HTML：

<img class="profilePicture hvr-pulse-grow" th:src="${currentProfilePicture}" />

我没有正确地转义静态引用吗？ @{/images/default-profile-picture.png} url 字符串打印出来很好......我基本上只是想将一个字符串传递给一个静态文件到 img 标签。

Answer 1

应该是这样的：

String currentProfilePicture = "/images/default-profile-picture.png";

<img class="profilePicture hvr-pulse-grow" th:src="@{${currentProfilePicture}}" />

如果不对预处理进行一些技巧，您无法传递整个 thymeleaf 字符串以进行评估，但上述内容应该可以满足您的需求。