英文:
"Circular view path would dispatch back to the current handler URL." when using Spring Boot and Thymeleaf
问题
当在使用 Spring Boot 和 Thymeleaf 时，尝试访问 /home URL 时，我遇到了以下问题：
ServletException：循环视图路径 [home]：将再次分派回当前处理程序 URL [/home]。请检查您的 ViewResolver 设置！（提示：这可能是未指定的视图的结果，因为默认视图名称生成的原因。）
pom.xml：
<!-- 省略 pom.xml 部分 -->
main/java/com.demo.WatchlistApplication.java：
// 省略 WatchlistApplication.java 部分
main/java/com.demo.controller.HomeController.java：
// 省略 HomeController.java 部分
main/resources/templates/home.html：
<!-- 省略 home.html 部分 -->
英文:
When using Spring Boot and Thymeleaf, when trying to accessing the /home URL I am getting the following:
ServletException: Circular view path [home]: would dispatch back to the current handler URL [/home] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>watchlist</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>watchlist</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
main/java/com.demo.WatchlistApplication.java:
package com.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class WatchlistApplication {
public static void main(String[] args) {
SpringApplication.run(WatchlistApplication.class, args);
}
}
main/java/com.demo.controller.HomeController.java:
package com.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HomeController {
@GetMapping("/home")
public ModelAndView home() {
return new ModelAndView("home");
}
}
main/resources/templates/home.html:
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta name="viewport" content="width = device-width, initial-scale = 1, shrink-to-fit = no">
<title>Web app</title>
</head>
<body>
<p th:text="'Hello world'"></p>
</body>
</html>
答案1
得分: 10
请为您的控制器类"HomeController"添加注解"@RestController"，而不是"@Controller"。
看起来与https://stackoverflow.com/questions/36697663/circular-view-path-error-spring-boot重复。
英文:
Annotate you controller class "HomeController" with annotation @RestController instead @Controller.
<br>
Seems duplicate of https://stackoverflow.com/questions/36697663/circular-view-path-error-spring-boot
答案2
得分: 1
@Controller
public class HomeController {
@GetMapping("/home")
public String home() {
return "home"; // be same as the template file name (without suffix)
}
}
你应该有 resources/templates/home.html。
确保 spring-boot-starter-thymeleaf 已成功下载。
<details>
<summary>英文:</summary>
For springboot 2.6.0, Try **controller**:
```java
@Controller
public class HomeController {
@GetMapping("/home")
public String home() {
return "home"; // be same as the template file name (without suffix)
}
}
You should have resources/templates/home.html.
Make sure the spring-boot-starter-thymeleaf has been downloaded successfully.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论