Spring Boot 移除 Whitelabel 错误页面

Question

我正在尝试删除白标错误页面，所以我所做的是为“/error”创建了一个 Controller 映射，

@RestController
public class IndexController {

    @RequestMapping(value = "/error")
    public String error() {
        return "Error handling";
    }

}

但现在我遇到了这个错误。

Exception in thread "AWT-EventQueue-0" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource   [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Invocation  of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'basicErrorController' bean method 
public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>>  org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletR equest)
to {[/error],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'indexController' bean method

不知道我是否做错了什么。请指教。

编辑:

已添加 error.whitelabel.enabled=false 到 application.properties 文件，仍然得到同样的错误

Answer 1

您需要将代码更改为以下内容:

@RestController
public class IndexController implements ErrorController{

    private static final String PATH = "/error";

    @RequestMapping(value = PATH)
    public String error() {
        return "Error handling";
    }

    @Override
    public String getErrorPath() {
        return PATH;
    }
}

您的代码不起作用，因为当您没有指定 ErrorController 的实现时，Spring Boot 会自动将 BasicErrorController 注册为 Spring Bean。

要查看这个事实，只需导航到 ErrorMvcAutoConfiguration.basicErrorController here .