从 Thymeleaf Spring 视图尝试调用方法时出错 [英] Error trying call method from view Thymeleaf Spring

问题描述

当我尝试从视图调用方法时遇到问题.

I have a problem when im try to call a method from view.

我的 Java 类和方法

My Java class with methods

public class FuncionesMuestroteca {
    @Bean
    public static boolean estoyMuestroteca() {
        boolean resultado = false;

        return resultado;
    }
}

现在我从 header.html 调用函数

Now i call function from header.html

<th:block th:text="${FuncionesMuestroteca.estoyMuestroteca()}"/>

在 POM.xml 中，我导入了 thymeleaf-extras 版本 2.1.0.RELEASE 和 thymeleaf 2.1.5

In POM.xml i have imported thymeleaf-extras version 2.1.0.RELEASE and thymeleaf 2.1.5

<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-java8time</artifactId>
<version>2.1.0.RELEASE</version>

这里是 StackTrace

And here the StackTrace

org.springframework.expression.spel.SpelEvaluationException: EL1011E: Method call: Attempted to call method estoyMuestroteca() on null context object

如果您需要其他任何东西，请随时告诉我，我会提供的.提前致谢.

If you need anything else, do not hesitate to tell me and I'll put it. Thank you in advance.

新的堆栈跟踪:

 org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'estoyMuestroteca' available

HTML 编辑

<div th:text="${@estoyMuestroteca.estoyMuestroteca()}"></div>

方法实际

@Configuration
public class FuncionesMuestroteca {
    @Bean(name = "estoyMuestroteca")
    public boolean estoyMuestroteca() {
        boolean resultado = false;

        return resultado;
    }
}

我添加项目文件夹结构的图片

推荐答案

这里有几件事.一、静态方法:

A couple things here. First, the static method:

public class FuncionesMuestrotecaUtilidad { //note name change

    public static boolean estoyMuestroteca() {
         return false; //don't need to create extra variables if this is what you need
    }
}

在您的 HTML 中，您可以使用正确的语法来调用静态方法:

In your HTML, you can use the proper syntax for calling a static method:

<th:block th:text="${T(com.package.FuncionesMuestrotecaUtilidad).estoyMuestroteca()}">
<!-- do whatever -->
</th:block>

将 com.package 替换为您的包名称.此外，这不需要 @Bean 或 @Configuration 注释 - 您只是直接调用静态方法.

Replace com.package with your package name. Also, this does not need the @Bean or @Configuration annotation - you are just calling a static method directly.

对这一切的主要警告是，可能有更好的方法来设计代码而不使用静态方法.但这超出了本问题的范围.

The major caveat to all this is that there might be a better way to design the code without using static methods. But that is outside the scope of this question.

最后，迁移到更新版本的 Thymeleaf 很有意义.它速度更快，限制更少，功能更多.

Lastly, it makes a lot of sense to move to a newer version of Thymeleaf. It's far faster, less restrictive, and has more features.

这篇关于从 Thymeleaf Spring 视图尝试调用方法时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！