SpringMVC中JSP页面显示为源码

@RequestMapping(value = "login")
public ModelAndView login(ModelAndView mav) throws Exception {
    mav.setViewName("login.jsp");
    return mav;
}

<url-pattern>/</url-pattern>不会匹配到*.jsp，不会进入spring的DispatcherServlet类。
<url-pattern>/*</url-pattern>会匹配*.jsp，导致进入spring的DispatcherServlet 类，然后去寻找controller，接着找不到对应的controller所以报错。配置文件中加入<mvc:default-servlet-handler />，login.jsp文件会被当做静态文件显示为文本。

<servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>