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@RequestMapping,DispatcherServlet获得处理方法执行
HandlerInterceptor#preHandler方法后寻找对应的HandlerAdapter。注解标记返回HandlerMethod对应RequestMappingHandlerAdapter
在其中封装HandlerMethodArgumentResolver参数解析列表
参数解析器
ServletRequestMethodArgumentResolver和ServletResponseMethodArgumentResolver
PathVariableMethodArgumentResolver
MatrixVariableMethodArgumentResolver和MatrixVariableMapMethodArgumentResolver
RequestParamMethodArgumentResolver— @RequestParam默认作为隐式注解
RequestHeaderMethodArgumentResolver