Spring Boot Web Thymeleaf:Spring IO Guide中用于“保护Web应用程序”的圆形视图路径

Question

我正在试用https://spring.io/guides/gs/securing-web/.提供的“保护Web应用程序”的Spring IO指南

该指南指示首先构建一个简单的不安全Web应用程序，然后使用Spring Security保护它。但是，在使用Spring Boot 2.0.1. RELEASE版本构建不安全的Web应用程序后，我在尝试访问Web应用程序的URL（http://localhost:9191/hello）时收到以下错误：

2018-05-04 09:58:07.742 ERROR 25968 --- [nio-9191-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Circular view path [hello]: would dispatch back to the current handler URL [/hello] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)] with root cause    

javax.servlet.ServletException: Circular view path [hello]: would dispatch back to the current handler URL [/hello] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)    

我复制了上述URL中可用的代码（即。https://spring.io/guides/gs/securing-web/)我的嵌入式tomcat服务器运行在端口9191上（其他应用程序使用端口8080）。感谢您的帮助。提前感谢！

编辑：

以下是指南中的配置/控制器代码：

@Configuration
public class MvcConfig implements WebMvcConfigurer {

    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/home").setViewName("home");
        registry.addViewController("/").setViewName("home");
        registry.addViewController("/hello").setViewName("hello");
        registry.addViewController("/login").setViewName("login");
    }

}

Answer 1

检查构建路径中的spring boot starter thymeleaf依存关系

Answer 2

请在您的pom中添加对thymeleaf的依赖项。因为的ViewResolver不存在以解决th：href="@{/hello}在您的hello.html中因此抛出错误：

在pom中添加以下依赖项。

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>