基本配置文件看起来不直观。

如果我创建简单的 hello world 示例，然后重命名 home.jsp至 home.html并编辑 servlet-context.xml文件来自

<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean> 

<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".html" />
</beans:bean>

WARN : org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/myapp/WEB-INF/views/home.html] in DispatcherServlet with name 'appServlet'

@Controller
public class HomeController {

    private static final Logger logger = LoggerFactory.getLogger(HomeController.class);

    /**
     * Simply selects the home view to render by returning its name.
     */
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String home(Locale locale, Model model) {
        logger.info("Welcome home! The client locale is {}.", locale);

        Date date = new Date();
        DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);

        String formattedDate = dateFormat.format(date);

        model.addAttribute("serverTime", formattedDate );

        return "home";
    }

}

最佳答案

问题背景

首先要理解的是:呈现jsp文件的不是spring。它是 JspServlet (org.apache.jasper.servlet.JspServlet) 做的。这个 servlet 带有 Tomcat(jasper 编译器)而不是 spring。这个 JspServlet 知道如何编译 jsp 页面以及如何将它作为 html 文本返回给客户端。 tomcat 中的 JspServlet 默认只处理匹配两种模式的请求:*.jsp 和 *.jspx。

现在，当 spring 使用 InternalResourceView 呈现 View 时(或 JstlView )，确实发生了三件事:

public class MyWebApplicationContext extends AnnotationConfigWebApplicationContext {
  private static final String CONFIG_FILES_LOCATION = "my.application.root.config";

  public MyWebApplicationContext() {
    super();
    setConfigLocation(CONFIG_FILES_LOCATION);
  }

}

public class AppInitializer implements WebApplicationInitializer {

  @Override
  public void onStartup(ServletContext servletContext) throws ServletException {
    WebApplicationContext context = new MyWebApplicationContext();
    servletContext.addListener(new ContextLoaderListener(context));

    addSpringDispatcherServlet(servletContext, context);

  }

  private void addSpringDispatcherServlet(ServletContext servletContext, WebApplicationContext context) {
    ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet",
      new DispatcherServlet(context));
    dispatcher.setLoadOnStartup(2);
    dispatcher.addMapping("/");
    dispatcher.setInitParameter("throwExceptionIfNoHandlerFound", "true");
  }
}

package my.application.root.config
// (...)

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
  @Autowired
  @Qualifier("jstlViewResolver")
  private ViewResolver jstlViewResolver;

  @Bean
  @DependsOn({ "jstlViewResolver" })
  public ViewResolver viewResolver() {
    return jstlViewResolver;
  }

  @Bean(name = "jstlViewResolver")
  public ViewResolver jstlViewResolver() {
    UrlBasedViewResolver resolver = new UrlBasedViewResolver();
    resolver.setPrefix("/WEB-INF/internal/");
    resolver.setViewClass(JstlView.class);
    resolver.setSuffix(".jsp");
    return resolver;
  }

}

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
  @Autowired
  @Qualifier("jstlViewResolver")
  private ViewResolver jstlViewResolver;

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

  }

  @Bean
  @DependsOn({ "jstlViewResolver" })
  public ViewResolver viewResolver() {
    return jstlViewResolver;
  }

  @Bean(name = "jstlViewResolver")
  public ViewResolver jstlViewResolver() {
    UrlBasedViewResolver resolver = new UrlBasedViewResolver();
    resolver.setPrefix(""); // NOTE: no prefix here
    resolver.setViewClass(JstlView.class);
    resolver.setSuffix(""); // NOTE: no suffix here
    return resolver;
  }

// NOTE: you can use InternalResourceViewResolver it does not matter 
//  @Bean(name = "internalResolver")
//  public ViewResolver internalViewResolver() {
//    InternalResourceViewResolver resolver = new InternalResourceViewResolver();
//    resolver.setPrefix("");
//    resolver.setSuffix("");
//    return resolver;
//  }
}

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/someurl/resources/home.html"); // NOTE here there is /someurl/resources
    }

}

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/resources/home_dynamic.jsp"); // NOTE here there is /resources (there is no /someurl/ because "someurl" is only for static resources 

}

<mvc:resources mapping="/someurl/resources/**" location="/resources/" />

<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- Please NOTE that it does not matter if you use InternalResourceViewResolver or UrlBasedViewResolver as in annotations example -->
    <beans:property name="prefix" value="" />
    <beans:property name="suffix" value="" />
</beans:bean>

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
  @Autowired
  @Qualifier("jstlViewResolver")
  private ViewResolver jstlViewResolver;

  @Bean
  @DependsOn({ "jstlViewResolver" })
  public ViewResolver viewResolver() {
    return jstlViewResolver;
  }

  @Bean(name = "jstlViewResolver")
  public ViewResolver jstlViewResolver() {
    InternalResourceViewResolver resolver = new InternalResourceViewResolver(); // NOTE: this time I'm using InternalResourceViewResolver and again it does not matter :)
    resolver.setPrefix("");
    resolver.setSuffix("");
    return resolver;
  }

}

public class AppInitializer implements WebApplicationInitializer {

  @Override
  public void onStartup(ServletContext servletContext) throws ServletException {
    WebApplicationContext context = new MyWebApplicationContext();
    servletContext.addListener(new ContextLoaderListener(context));

    addStaticHtmlFilesHandlingServlet(servletContext);
    addSpringDispatcherServlet(servletContext, context);

  }

 // (...)

  private void addStaticHtmlFilesHandlingServlet(ServletContext servletContext) {
    ServletRegistration.Dynamic servlet = servletContext.addServlet("HtmlsServlet", new JspServlet()); // org.apache.jasper.servlet.JspServlet
    servlet.setLoadOnStartup(1);
    servlet.addMapping("*.html");
  }

}

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-jasper</artifactId>
    <version>${tomcat.libs.version}</version>
    <scope>provided</scope> <!--- NOTE: scope provided! -->
</dependency>
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-jsp-api</artifactId>
    <version>${tomcat.libs.version}</version>
    <scope>provided</scope>
</dependency>

<servlet>
    <servlet-name>htmlServlet</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <load-on-startup>3</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>htmlServlet</servlet-name>
    <url-pattern>*.html</url-pattern>
</servlet-mapping>

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/resources/home.html"); 

}

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/resources/home_dynamic.jsp");

}

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
  @Autowired
  @Qualifier("jstlViewResolver")
  private ViewResolver jstlViewResolver;

  @Bean
  @DependsOn({ "jstlViewResolver" })
  public ViewResolver viewResolver() {
    return jstlViewResolver;
  }

  @Bean(name = "jstlViewResolver")
  public ViewResolver jstlViewResolver() {
    InternalResourceViewResolver resolver = new InternalResourceViewResolver(); // NOTE: this time I'm using InternalResourceViewResolver and again it does not matter :)
    resolver.setPrefix("");
    resolver.setSuffix("");
    return resolver;
  }

}

public class StaticFilesServlet extends HttpServlet {
  @Override
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setCharacterEncoding("UTF-8");

    String resourcePath = request.getRequestURI();
    if (resourcePath != null) {
      FileReader reader = null;
      try {
        URL fileResourceUrl = request.getServletContext().getResource(resourcePath);
        String filePath = fileResourceUrl.getPath();

        if (!new File(filePath).exists()) {
          throw new IllegalArgumentException("Resource can not be found: " + filePath);
        }
        reader = new FileReader(filePath);

        int c = 0;
        while (c != -1) {
          c = reader.read();
          if (c != -1) {
            response.getWriter().write(c);
          }
        }

      } finally {
        if (reader != null) {
          reader.close();
        }
      }
    }
  }
}

public class AppInitializer implements WebApplicationInitializer {

  @Override
  public void onStartup(ServletContext servletContext) throws ServletException {
    WebApplicationContext context = new MyWebApplicationContext();
    servletContext.addListener(new ContextLoaderListener(context));

    addStaticHtmlFilesHandlingServlet(servletContext);
    addSpringDispatcherServlet(servletContext, context);

  }

 // (...)

  private void addStaticHtmlFilesHandlingServlet(ServletContext servletContext) {
    ServletRegistration.Dynamic servlet = servletContext.addServlet("HtmlsServlet", new StaticFilesServlet());
    servlet.setLoadOnStartup(1);
    servlet.addMapping("*.html");

  }

}

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/resources/home.html");

}

@Controller
public class HomeController {

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView home(Locale locale, Model model) {
        // (...)

        return new ModelAndView("/resources/home_dynamic.jsp");

}

关于java - 如何在 Spring MVC 中将请求映射到 HTML 文件？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16598594/