Java配置SimpleUrlHandlerMapping（Spring Boot）

Question

我有一个现有的Spring web应用程序，使用了两个控制器，它们都继承自AbstractController。我想将Spring Boot集成到应用程序中，以便我们可以将其作为独立应用程序运行。

我遇到了一个问题，因为Spring没有将调用转发到我的控制器。如何将控制器映射到像“/app / *”这样的URL模式？

SampleController.java

@Controller("myController")
public class SampleController extends AbstractController {
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
        response.getWriter().print("Hello world!");
        return null;
    }
}

Application.java

@EnableAutoConfiguration
@Configuration
@ComponentScan
public class Application {
    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public SimpleUrlHandlerMapping sampleServletMapping() {
        SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();

        Properties urlProperties = new Properties();
        urlProperties.put("/index", "myController");

        mapping.setMappings(urlProperties);

        return mapping;
    }
}

当我启动应用程序时，我会收到以下消息：

INFO  [org.springframework.web.servlet.handler.SimpleUrlHandlerMapping] Mapped URL path [/index] onto handler 'myController'

但是当我向/index发送请求时，我收到以下信息：

DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] Looking up handler method for path /index
DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] Did not find handler method for [/index]
DEBUG [org.springframework.web.servlet.handler.SimpleUrlHandlerMapping] Matching patterns for request [/index] are [/**]
DEBUG [org.springframework.web.servlet.handler.SimpleUrlHandlerMapping] URI Template variables for request [/index] are {}
DEBUG [org.springframework.web.servlet.handler.SimpleUrlHandlerMapping] Mapping [/index] to HandlerExecutionChain with handler [org.springframework.web.servlet.resource.ResourceHttpRequestHandler@11195d3e] and 1 interceptor

- lmazgon

Answer 1

SimpleUrlHandlerMappings是有序的，正如在javadoc中所描述的那样，默认值为Integer.MAX_VALUE，这意味着它们具有最低可能的优先级。这导致ResourceHttpRequestHandler（它被映射到/**，并且默认情况下具有Integer.MAX_VALUE - 1的顺序）比您的控制器映射具有更高的优先级。

更新您的sampleServletMapping()方法以将您的映射顺序设置为小于Integer.MAX_VALUE - 1的值。例如:

@Bean
public SimpleUrlHandlerMapping sampleServletMapping() {
    SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
    mapping.setOrder(Integer.MAX_VALUE - 2);

    Properties urlProperties = new Properties();
    urlProperties.put("/index", "myController");

    mapping.setMappings(urlProperties);


    return mapping;
}

- Andy Wilkinson