错误提示：
org.springframework.web.servlet.DispatcherServlet noHandlerFound
警告: No mapping found for HTTP request with URI [/spring/test] in DispatcherServlet with name 'spring'
错误代码：@RequestMapping(name="/test")
正确代码：@RequestMapping(value="/test")
源码的注释：
/**
* Assign a name to this mapping.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used on both levels, a combined name is derived by concatenation
* with "#" as separator.
* @see org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder
* @see org.springframework.web.servlet.handler.HandlerMethodMappingNamingStrategy
*/
String name() default "";
/**
* The primary mapping expressed by this annotation.
* <p>In a Servlet environment this is an alias for {@link #path}.
* For example {@code @RequestMapping("/foo")} is equivalent to
* {@code @RequestMapping(path="/foo")}.
* <p>In a Portlet environment this is the mapped portlet modes
* (i.e. "EDIT", "VIEW", "HELP" or any custom modes).
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this primary mapping, narrowing it for a specific handler method.
*/
@AliasFor("path")
String[] value() default {};
这个错误搞了好久，因为凭着记忆写的，却偏偏将value误写成name，后台没有明显的提示错误信息，只是警告，所以就一直以为是配置信息有问题，一遍一遍的检测配置信息，一遍一遍的创建新的项目，一遍一遍的启动项目，真的是一手失成千古恨。