Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Sep 08 11:23:31 CST 2023
There was an unexpected error (type=Not Found, status=404).
浏览器直接请求，没有匹配的API时
会跳转到一个错误页面，显示不好看
如何自定义?
翻源码，有一个顶层接口：
/**
* Interface that can be implemented by beans that resolve error views.
*
* @author Phillip Webb
* @since 1.4.0
*/
@FunctionalInterface
public interface ErrorViewResolver {
/**
* Resolve an error view for the specified details.
* @param request the source request
* @param status the http status of the error
* @param model the suggested model to be used with the view
* @return a resolved {@link ModelAndView} or {@code null}
*/
ModelAndView resolveErrorView(HttpServletRequest request, HttpStatus status, Map<String, Object> model);
}
查看实现类
DefaultErrorViewResolver
当没有其他配置时，会走这个方法
private ModelAndView resolveResource(String viewName, Map<String, Object> model) {
for (String location : this.resources.getStaticLocations()) {
try {
Resource resource = this.applicationContext.getResource(location);
resource = resource.createRelative(viewName + ".html");
if (resource.exists()) {
return new ModelAndView(new HtmlResourceView(resource), model);
}
}
catch (Exception ex) {
}
}
return null;
}
实际会找/resources/META-INF/resources/error/ 这个目录下找有没有404.html 500/html
* 最终会编译到boot.jar: /META-INF/resources/error/
所以只要在这个目录下 加404.html 500.html即可