在我看来，这是一个非常模棱两可和难以理解的问题。 我在Spring Boot + Kotlin上有一个应用程序。以前，该应用程序具有Rest控制器的例外；最近需要在响应中提供html，因此添加了常规控制器。但是，将此控制器映射到1个以上级别时-所有请求（超过1个级别）都会导致错误：
<html>
<body>
<h1> Whitelabel Error Page </h1>
<p> This application has no explicit mapping for / error,so you are seeing this as a fallback. </p>
<div> There was an unexpected error (type = Not Found,status = 404). </div>
<div> No message available </div>
</body>
</html>
此外，第一个级别的请求可以正常工作。
这与之完全无关。大量尝试解决此问题（无济于事），但可能遗漏了一些东西。
我应用与可能的问题相关联的设置（如果突然有人尝试提供帮助并且需要其他帮助，请告诉我，我会添加此信息）
控制器
@Controller
@RequestMapping("/welcome")
class WelcomeEndpoint {
@GetMapping
fun welcome(): String {
return "index.html"
}
@GetMapping("/welcome")
fun signIn(): String {
return "index.html"
}
}
WebMvcConfig
@Configuration
@EnableWebMvc
class WebMvcConfig : WebMvcConfigurer {
private final val classpathResourceLocations = arrayOf(
"classpath:/Meta-INF/resources/","classpath:/resources/","classpath:/static/","classpath:/public/"
)
override fun addResourceHandlers(registry: ResourceHandlerRegistry) {
if (!registry.hasMappingForPattern("/**")) {
registry.addResourceHandler("/**")
.addResourceLocations(*classpathResourceLocations)
}
}
override fun addViewControllers(registry: ViewControllerRegistry) {
registry.addViewController("/").setViewName("index.html")
}
@Bean
fun internalResourceViewResolver(): ViewResolver {
val viewResolver = InternalResourceViewResolver()
viewResolver.setViewClass(InternalResourceView::class.java)
return viewResolver
}
}
WebSecurityConfig
@Configuration
@EnableWebSecurity
class CommonSecurityConfig : WebSecurityConfigurerAdapter() {
private val permitPatterns = arrayOf(
"/","/welcome/**","/resources/**","/actuator/health**","/swagger-resources/**","/swagger-ui.html","/v2/api-docs","/webjars/**"
)
override fun configure(http: HttpSecurity) {
super.configure(http)
http.sessionmanagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
.and()
.cors().configurationSource(corsConfigurationSource())
.and()
.authorizeRequests()
.antMatchers(HttpMethod.OPTIONS,"/**").permitAll()
.antMatchers(*permitPatterns).permitAll()
.antMatchers("/api/internal/**").hasAuthority("ADMIN")
.anyRequest().authenticated()
.and()
.addFilterAfter(filter(),usernamePasswordauthenticationFilter::class.java)
}
// ... some logic after ...
}
因此，如果我沿着路径http://localhost:8080/welcome执行请求，我将获得index.html页面
如果我沿着路径http://localhost:8080/welcome/welcome执行请求-我收到上面的错误
index.html文件位于路径src/main/resources/static/index.html