如何使用纯基于Java的配置配置Spring MVC？

Question

我有一个非常简单的Spring MVC设置。我的应用程序上下文。xml是这样的：

<mvc:annotation-driven />
<mvc:resources mapping="/css/**" location="/css/" />
<context:property-placeholder location="classpath:controller-test.properties" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
    p:prefix="/WEB-INF/views/" p:suffix=".jsp" />

我的网络。xml目前是这样的：

  <servlet>
   <servlet-name>springDispatcherServlet</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:applicationContext.xml</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
  </servlet>

  <!-- Map all requests to the DispatcherServlet for handling -->
  <servlet-mapping>
    <servlet-name>springDispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

我试图将此设置转换为纯基于Java的配置。我搜索过网络，到目前为止，我找到了一些东西，解释了（一些什么）如何进行Java配置，但没有解释如何在环境中注册Java配置，即web上下文

到目前为止，我对@Configuration的了解是：

 @Configuration
 @EnableWebMvc
 @PropertySource("classpath:controller.properties")
 @ComponentScan("com.project.web")
 public class WebSpringConfig extends WebMvcConfigurerAdapter {

 @Override
 public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/css/**").addResourceLocations("/css/");
 }

 @Bean
 public ViewResolver configureViewResolver() {
     InternalResourceViewResolver viewResolve = new InternalResourceViewResolver();
     viewResolve.setPrefix("/WEB-INF/views/");
     viewResolve.setSuffix(".jsp");

     return viewResolve;
 }

 @Override
 public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer){
   configurer.enable();
 }
}

如何在web容器中注册？我正在使用最新的spring（4.02）

谢谢

Answer 1

基于Java的配置，无需向^{添加任何元素WebApplicationInitializer非常适合与Spring基于代码的@Configuration类一起使用

WebApplicationInitializer«接口将在Servlet 3.0+ environments中实现，以便以编程方式配置ServletContext，而不是（或可能与）传统web。基于xml的方法<强>Implementations of this SPI will be detected automatically by SpringServletContainerInitializer, which itself is bootstrapped automatically by any Servlet 3.0 container^{Using Servlet Spec 3.0 of Tomcat 7}

Spring 3.2中列出了一些实现WebApplicationInitializer的抽象类，这些抽象类将由SrevletContainer自动检测

AbstractAnnotationConfigDispatcherServletInitializer extends
AbstractDispatcherServletInitializer extends
AbstractContextLoaderInitializer implements WebApplicationInitializer

将Spring 4.1.6.RELEASE版本与模块core, web, webmvc, beans一起使用

public class WebXML_DispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

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

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return null;
    }

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

}

基于Java的配置，为Spring提供静态资源^{Spring Boot}

@Configuration
@EnableWebMvc // <mvc:annotation-driven />
@ComponentScan(value = {"com.github.yash777.controllers"})
// <context:component-scan base-package="com.github.yash777" />
public class MvcServletXMLConfigurer extends WebMvcConfigurerAdapter implements WebMvcConfigurer {

    /**
     * <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
     * p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
     * 
     * @return InternalResourceViewResolver as a bean configuration.
     */
    @Bean
    public InternalResourceViewResolver getInternalResourceViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        System.out.println("WebMvcConfigurer - addResourceHandlers() function get loaded...");

        // <mvc:resources mapping="/styles/**" location="/css/" />
        registry
            .addResourceHandler("/styles/**") 
            .addResourceLocations("/css/") // webapp/css/
            .setCachePeriod(3600)
            .resourceChain(true) // Spring 4.1
            .addResolver(new GzipResourceResolver()) // Spring 4.1
            .addResolver(new PathResourceResolver()); // Spring 4.1

        // <mvc:resources mapping="/static/**" location="/static/" />
        registry.addResourceHandler("/static/**")
                .addResourceLocations("/static/", "classpath:/static/") // src/main/resources/static/
                .setCachePeriod(3600)
                .resourceChain(true)
                .addResolver(new PathResourceResolver());
    }
}

列出了一个示例控制器：

@Controller
@RequestMapping(value = { "/controller", "/c" })
public class Test extends HttpServlet {
    private static final long serialVersionUID = 1L;

    @RequestMapping(value = {"/message", "/m"}, method = RequestMethod.GET )
    public void message(HttpServletRequest request, HttpServletResponse response ) throws IOException {
        System.out.println("@Controller Get method called.");
    }

    @RequestMapping(value = "/getView", method = RequestMethod.GET )
    public ModelAndView setViewName( Model model ) {
        System.out.println("GET... /getView");
        ModelAndView mav = new ModelAndView();
        mav.setViewName("test");
        return mav;
    }
}

WEB-INF/web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
</web-app>