spring mvc no xml 配置404錯誤

Question

我正在嘗試開發一個沒有 XML 應用程序的簡單 Spring MVC。它基本上顯示一個簡單的主頁。 I am using tomcat on JetBrains IDE for development and problem is that when I run it on tomcat I see 404 error this is url http://localhost:8080/MySpringSecurityApp_war/

這是 controller

@Component
public class DemoController {
    @GetMapping("/")
    public String showHome(){
        return "home";
    }
}

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.luv2code.springsecurity.demo")
public class DemoAppConfig  {
    //define a bean for view resolver
    @Bean
   public ViewResolver viewResolver(){
      InternalResourceViewResolver viewResolver=new InternalResourceViewResolver();
      viewResolver.setPrefix("/WEB-INF/view/");
      viewResolver.setSuffix(".jsp");
      return  viewResolver;
    }
}

public class MySpringMvcDispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[0];
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] {DemoAppConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

這是錯誤日志

9-Jun-2020 13:32:07.511 WARNING [http-nio-8080-exec-1] org.springframework.web.servlet.PageNotFound.noHandlerFound No mapping found for HTTP request with URI [/MySpringSecurityApp_war/] in DispatcherServlet with name 'dispatcher'
09-Jun-2020 13:32:07.604 WARNING [http-nio-8080-exec-4] org.springframework.web.servlet.PageNotFound.noHandlerFound No mapping found for HTTP request with URI [/MySpringSecurityApp_war/] in DispatcherServlet with name 'dispatcher'

這也是我的項目結構

Answer 1

如果您在 URL 中添加一些東西（在您的情況下基本上是主機部分MySpringSecurityApp_war之后），您需要定義一個資源路徑，您正在調用localhost:8080/MySpringSecurityApp_war/但您沒有在任何地方定義資源路徑所以我猜你需要什么要做的是在 class 級別添加@RequestMapping("/MySpringSecurityApp_war/")或者只調用localhost:8080/而不使用任何資源路徑您也可以使用@RestController代替@Component 。

我希望它會奏效。