Xpath 处理带有命名空间的xml

SAXReader saxReader = new SAXReader();
	Document document;
	try {
		document = saxReader.read(new File(path + processKey));
		Map nameSpaceMap = new HashMap();
		nameSpaceMap.put("jbpm", "http://jbpm.org/4.4/jpdl");
		//设置命名空间
		saxReader.getDocumentFactory().setXPathNamespaceURIs(nameSpaceMap);
		//使用xpath找节点的时候前面加  jbpm:  就可以找到。
		Element eleTask = (Element) document.selectSingleNode("/process/jbpm:decision[@name='" + nodeName + "']");
		OutputFormat format = new OutputFormat("", false, "utf-8"); // 设置输出格式为空两格，换行，编码为utf-8
		XMLWriter writer = new XMLWriter(new FileOutputStream(path +processKey), format); // 创建输出对象
		writer.write(document);
		writer.close();
	} catch (DocumentException e1) {
		e1.printStackTrace();
	} catch (IOException e) {
		e.printStackTrace();
	}