Spring MVC的handlermapping之SimpleUrlHandlerMapping初始化

前面信息同BeanNameUrlHandlerMapping,这里不再过多分析，详情请看 :Spring MVC的handlermapping之BeanNameUrlHandlerMapping初始化

同样先上类图：

可以看到SimpleUrlHandlerMapping是直接继承AbstractUrlHandlerMapping的

 public class SimpleUrlHandlerMapping extends AbstractUrlHandlerMapping {
     private final Map<String, Object> urlMap = new HashMap(); //用来保存url和handler的映射关系。

     public SimpleUrlHandlerMapping() {
     }

     public void setMappings(Properties mappings) { //通过spring自动注入，mapping属性值
         CollectionUtils.mergePropertiesIntoMap(mappings, this.urlMap);
     }

     public void setUrlMap(Map<String, ?> urlMap) { //通过spring自动注入，urlMap的值
         this.urlMap.putAll(urlMap);
     }

     public Map<String, ?> getUrlMap() {
         return this.urlMap;
     }

     public void initApplicationContext() throws BeansException { //重写方法，自己搞定注册处理器逻辑
         super.initApplicationContext();
         this.registerHandlers(this.urlMap);
     }

     protected void registerHandlers(Map<String, Object> urlMap) throws BeansException {
         String url;
         Object handler;
         if (urlMap.isEmpty()) {
             this.logger.warn("Neither 'urlMap' nor 'mappings' set on SimpleUrlHandlerMapping");
         } else { //遍历map,对url和handler进行合法性修补，最后调用父类进行注册处理器
             for(Iterator i$ = urlMap.entrySet().iterator(); i$.hasNext(); this.registerHandler(url, handler)) {
                 Entry<String, Object> entry = (Entry)i$.next();
                 url = (String)entry.getKey();
                 handler = entry.getValue();
                 if (!url.startsWith("/")) {
                     url = "/" + url;
                 }

                 if (handler instanceof String) {
                     handler = ((String)handler).trim();
                 }
             }
         }

     }
 }