1.后缀为jsp和html的文件都存在，当后缀设为jsp时，访问相应url可以访问到，当为html时，访问url找不到资源，这是为什么？有猜想过是因为url-pattern设为“/”导致的，但是为什么html不可以，而jsp可以。

2.相关代码如下
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
    <servlet>
        <servlet-name>app</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:myMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>app</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

myMVC.xml 当suffix设为html时访问url没有效果，但是jsp就可以

<beans xmlns = "http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context = "http://www.springframework.org/schema/context"
       xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation = "http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    
    <context:component-scan base-package = "hello" />

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

</beans>

HelloController.java

@Controller
@RequestMapping("")
public class HelloController {

    @GetMapping("/hello")
    public String handle(Model model) {
        model.addAttribute("message", "Hello World!");
        return "index";
    }

}

3.会有错误信息 org.springframework.web.servlet.DispatcherServlet.noHandlerFound No mapping found for HTTP request with URI [/WEB-INF/pages/index.html] in DispatcherServlet with name 'app'
是什么原因造成这种现象的？