BeanFactoryUtils這個類中的方法public static Map beansOfTypeIncludingAncestors(ListableBeanFactory lbf,Class type, boolean includeNonSingletons, boolean allowEagerInit) throwsBeansException
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大話西游666
TA貢獻1817條經(jīng)驗 獲得超14個贊
spring 容器會在啟動的時候為DispatcherServlet初始化handlerMapping.
// Find all HandlerMappings in the ApplicationContext,
// including ancestor contexts.
Map matchingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
context, HandlerMapping.class, true, false);
即找到在context里聲明的，所有HandlerMapping和其子類的bean. 可以有多個，這些handlerMapping里有順序聲明，可以根據(jù)它來排序。
public static Map beansOfTypeIncludingAncestors(ListableBeanFactory lbf, Class type)
throws BeansException {
Assert.notNull(lbf, "ListableBeanFactory must not be null");
Map result = new LinkedHashMap(4);
result.putAll(lbf.getBeansOfType(type));
if (lbf instanceof HierarchicalBeanFactory) {
HierarchicalBeanFactory hbf = (HierarchicalBeanFactory) lbf;
if (hbf.getParentBeanFactory() instanceof ListableBeanFactory) {
Map parentResult = beansOfTypeIncludingAncestors(
(ListableBeanFactory) hbf.getParentBeanFactory(), type);
for (Iterator it = parentResult.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
String beanName = (String) entry.getKey();
if (!result.containsKey(beanName) && !hbf.containsLocalBean(beanName)) {
result.put(beanName, entry.getValue());
}
}
}
}
return result;
}
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