使用dom4j读取spring配置文件

 

public class ItcastClassPathXmlApplicationContext {

     private List beanDefines = new ArrayList();

     public ItcastApplicationContext(String filename){

  init(filename);

      }

      private void init(String filename){

       SAXReader saxReader = new SAXReader();  

        Document document=null;  

        try{

         URL xmlpath = this.getClass().getClassLoader().getResource(filename);

         document = saxReader.read(xmlpath);

         Map nsMap = new HashMap();

         nsMap.put("ns","http://www.springframework.org/schema/beans");//加入命名空间,下面要用ns，才能找到指定元素！

         XPath xsub = document.createXPath("//ns:beans/ns:bean");//创建beans/bean查询路径

         xsub.setNamespaceURIs(nsMap);//设置命名空间

         List beans = xsub.selectNodes(document);//获取文档下所有bean节点

         for(Element element: beans){

            String id = element.attributeValue("id");//获取id属性值

            String clazz = element.attributeValue("class"); //获取class属性值       

            BeanDefinition beanDefine = new BeanDefinition(id, clazz);

            beanDefines.add(beanDefine);

         }  

        }catch(Exception e){  

            e.printStackTrace();

        }

    }

}