Why Spring Boot 4 "custom error page" fails 404? - spring

Question

I tried to implement an own error page handling.But my page doesnt show up.
Controller:
#Controller
public class MyCustomErrorController implements ErrorController {
#RequestMapping(value = "/error", method = RequestMethod.GET)
public String handleError() {
return "error";
}
#Override
public String getErrorPath() {
return "/error";
}}
I did my own error.html file in src/main/resources/static/html.
The html folder is created by myself. Where is the problem?
<dependencies>
<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>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<!-- <scope>provided</scope> -->
</dependency>
</dependencies>

Answer 1

You can open your html file from static content like
localhost:8080/yourpagename
By default, Spring boot serves index.html as the root resource when accessing the root URL of a web application.
(yourhtml).html should exist under any of these paths:
src/main/resources/META-INF/resources/home.html
src/main/resources/resources/home.html
src/main/resources/static/home.html
src/main/resources/public/home.html
In order to view your error.html static page you need to return “error.html” in controller
In order to define your own static resource locations
you could use this property in application.properties or application.yml file :
spring.resources.static-locations=your own locations