Spring的meta标签
Spring的解析源码
public void parseMetaElements(Element ele, BeanMetadataAttributeAccessor attributeAccessor) { //获取当前节点的所有子元素
NodeList nl = ele.getChildNodes(); for (int i = 0; i < nl.getLength(); i++) { Node node = nl.item(i); //提取meta
if (isCandidateElement(node) && nodeNameEquals(node, META_ELEMENT)) { Element metaElement = (Element) node; String key = metaElement.getAttribute(KEY_ATTRIBUTE); String value = metaElement.getAttribute(VALUE_ATTRIBUTE); //使用key、value构造BeanMetadataAttribute
BeanMetadataAttribute attribute = new BeanMetadataAttribute(key, value); attribute.setSource(extractSource(metaElement)); //记录信息
attributeAccessor.addMetadataAttribute(attribute); } } }
meta属性的使用
<meta key="special-data" value="sprecial stragey" />
BeanDefinition bd;
String beanCategoriesExpression = (String)bd.getAttribute(CATEGORY_META_KEY);