一、前言
关于spring-web的包中通过org.springframework.http.HttpMethod枚举类，定义了关于http的8种methodType方法类型(GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS, TRACE)，该示例中使用enums的默认values()获取所有枚举实例的值，再通过httpMethod.name()获取对应属性名称注入关系字典中mappings，详情源码示例。
二、源码示例package org.springframework.http;@b@@b@import java.util.HashMap;@b@import java.util.Map;@b@@b@public enum HttpMethod@b@{@b@ GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS, TRACE;@b@@b@ private static final Map mappings;@b@@b@ public static HttpMethod resolve(String method)@b@ {@b@ return ((method != null) ? (HttpMethod)mappings.get(method) : null);@b@ }@b@@b@ public boolean matches(String method)@b@ {@b@ return (this == resolve(method));@b@ }@b@@b@ static{@b@ mappings = new HashMap(8);@b@@b@ HttpMethod[] arrayOfHttpMethod = values();@b@ int i = arrayOfHttpMethod.length; @b@ for (int j = 0; j