Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="/POM/4.0.0"
xmlns:xsi="http:///2001/XMLSchema-instance"
xsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.">
<modelVersion>4.0.0</modelVersion>
<groupId></groupId>
<artifactId>thymeleaf-test</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId></groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.6</version>
<relativePath/>
</parent>
<dependencyManagement>
<dependencies>
<!-- /artifact//spring-boot-starter-thymeleaf -->
<!-- 版本不能太高，此3.及以上版本无法和spring-boot的版本对上，需要降低版本（或者用parent管控默认的版本) -->
<!-- <dependency>-->
<!-- <groupId></groupId>-->
<!-- <artifactId>spring-boot-starter-thymeleaf</artifactId>-->
<!-- <version>3.1.5</version>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId></groupId>-->
<!-- <artifactId>spring-boot-starter-thymeleaf</artifactId>-->
<!-- <version>2.6.7</version>-->
<!-- </dependency>-->
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId></groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId></groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>