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I am very new to Spring. I am trying to build a MVC application using Spring Boot which shows a list of products. But i am getting the below error:
javax.servlet.ServletException: Circular view path [products]: would dispatch back to the current handler URL [/products] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
Here is controller:
package com.springframeworkguru.controllers; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.springframeworkguru.services.ProductService; @Controller public class ProductController { private ProductService productService; @Autowired public void setProductService(ProductService productService) { this.productService = productService; } @RequestMapping("/products") public String listProducts(Model model){ model.addAttribute("products", productService.listAllProducts()); return "products"; } } This is the main class:
package com.springframeworkguru; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.context.web.SpringBootServletInitializer; import com.springframeworkguru.controllers.ProductController; @SpringBootApplication public class SpringmvcApplication extends SpringBootServletInitializer{ public static void main(String[] args) { SpringApplication.run(SpringmvcApplication.class, args); } } and products.html:
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <title>Spring Core Online Tutorial - List Products</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <link href="http://cdn.jsdelivr.net/webjars/bootstrap/3.3.4/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/3.3.5/css/bootstrap.min.css}" rel="stylesheet" media="screen"/> <script src="http://cdn.jsdelivr.net/webjars/jquery/2.1.4/jquery.min.js" th:src="@{/webjars/jquery/2.1.4/jquery.min.js}"></script> <link href="../css/spring-core.css" th:href="@{css/spring-core.css}" rel="stylesheet" media="screen"/> </head> <body> <div class="container"> <div th:if="${not #lists.isEmpty(products)}"> <h2>Product List</h2> <table class="table table-striped"> <tr> <th>Id</th> <th>Description</th> <th>Price</th> <th>Image URL</th> <th>List</th> </tr> <tr th:each="product : ${products}"> <td th:text="${product.id}"></td> <td th:text="${product.description}"></td> <td th:text="${product.price}"></td> <td th:text="${product.imageUrl}"></td> <td><a th:href="${'/product/' + product.id}">View</a> </td> </tr> </table> </div> </div> </body> </html> The products.html is in /static folder. Also, I am using Eclipse Kepler.
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The Circular view path error in spring boot occurs when the request mapping url and the model view url are the same in a rest controller method and no ViewResolver is configured. The check your viewresolver setup!
@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it's the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.
The ViewResolver provides a mapping between view names and actual views. The View interface addresses the preparation of the request and hands the request over to one of the view technologies.
Adding spring-boot-starter-thymeleaf dependency solved the problem.
So add this to your pom.xml file:
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> Update: If you are working with Eclipse and you are using Gradle, this might not work. The reason is if you haven't imported the project as 'gradle project' Eclipse wont detect thymeleaf. So here's the solution:
Step1 : Run "gradle eclipse" on command line.
Step2 : Run "gradle wrapper"
Step3 : In eclipse import as gradle project (before this remove the already imported project)
Step4 : Now run using eclipse
Step5 : Enjoy!
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You can also be here because:
You forgot to put the @RestController of your rest controller over the class
You set @Controller instead of @RestController
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