从Spring 5.0开始，你不需要创建额外的异常:

throw new ResponseStatusException(NOT_FOUND, "Unable to find resource");

此外，你可以用一个内置异常覆盖多个场景，你有更多的控制。

看到更多:

ResponseStatusException (javadoc) https://www.baeldung.com/spring-response-status-exception

简单地说，您可以使用web.xml添加错误代码和404错误页面。但是要确保404错误页面不能位于WEB-INF下面。

<error-page>
    <error-code>404</error-code>
    <location>/404.html</location>
</error-page>

这是最简单的方法，但也有局限性。假设您希望为该页添加与其他页相同的样式。这样你就不能那样做了。你必须使用@ResponseStatus(value = HttpStatus.NOT_FOUND)

从Spring 3.0.2开始，你可以返回ResponseEntity<T>作为控制器方法的结果:

@RequestMapping.....
public ResponseEntity<Object> handleCall() {
    if (isFound()) {
        // do what you want
        return new ResponseEntity<>(HttpStatus.OK);
    }
    else {
        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
    }
}

(ResponseEntity<T>是一个比@ResponseBody注释更灵活的注释-参见另一个问题)

因为做同一件事至少有十种方法总是好的:

import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class Something {
    @RequestMapping("/path")
    public ModelAndView somethingPath() {
        return new ModelAndView("/", HttpStatus.NOT_FOUND);
    }
}

我建议抛出HttpClientErrorException，就像这样

@RequestMapping(value = "/sample/")
public void sample() {
    if (somethingIsWrong()) {
        throw new HttpClientErrorException(HttpStatus.NOT_FOUND);
    }
}

您必须记住，这只能在将任何内容写入servlet输出流之前进行。

使用setting配置web.xml

<error-page>
    <error-code>500</error-code>
    <location>/error/500</location>
</error-page>

<error-page>
    <error-code>404</error-code>
    <location>/error/404</location>
</error-page>

创建新控制器

   /**
     * Error Controller. handles the calls for 404, 500 and 401 HTTP Status codes.
     */
    @Controller
    @RequestMapping(value = ErrorController.ERROR_URL, produces = MediaType.APPLICATION_XHTML_XML_VALUE)
    public class ErrorController {


        /**
         * The constant ERROR_URL.
         */
        public static final String ERROR_URL = "/error";


        /**
         * The constant TILE_ERROR.
         */
        public static final String TILE_ERROR = "error.page";


        /**
         * Page Not Found.
         *
         * @return Home Page
         */
        @RequestMapping(value = "/404", produces = MediaType.APPLICATION_XHTML_XML_VALUE)
        public ModelAndView notFound() {

            ModelAndView model = new ModelAndView(TILE_ERROR);
            model.addObject("message", "The page you requested could not be found. This location may not be current.");

            return model;
        }

        /**
         * Error page.
         *
         * @return the model and view
         */
        @RequestMapping(value = "/500", produces = MediaType.APPLICATION_XHTML_XML_VALUE)
        public ModelAndView errorPage() {
            ModelAndView model = new ModelAndView(TILE_ERROR);
            model.addObject("message", "The page you requested could not be found. This location may not be current, due to the recent site redesign.");

            return model;
        }
}