Java中xml文件的解析

        dependency>
            groupId>dom4jgroupId>
            artifactId>dom4jartifactId>
            version>1.6.1version>
        dependency>
        dependency>
            groupId>jaxengroupId>
            artifactId>jaxenartifactId>
            version>1.1.6version>
        dependency>

   /**
     * 将输入流解析成Document
     * @param inputStream
     * @return
     * @throws DocumentException
     */
    public static Document parse(InputStream inputStream) {
        Document document = null;
        try {
            SAXReader saxReader = new SAXReader();
            document = saxReader.read(inputStream);
        } catch (DocumentException e) {
            throw new BusinessException("parse file exception:",e);
        }
        return document;
    }

    /**
     * 根据xpath表达式获取Document中所有的节点元素
     * @param document
     * @param xpathExp
     * @return
     */
    public static List getNodes(Document document, String xpathExp) {
        return document.selectNodes(xpathExp);
    }

    /**
     * 根据xpath表达式获取Document中所有对应节点的值
     *
     * @param document
     * @param xpathExp
     * @return
     * @throws DocumentException
     */
    public static List getNodeValues(Document document, String xpathExp) {
        List elements = document.selectNodes(xpathExp);
        List nodeValues = new ArrayList(elements.size());
        for (Element element : elements) {
            nodeValues.add(element.getText());
        }
        return nodeValues;
    }

    /**
     * 根据xpath表达式获取Document中对应节点的值
     *
     * @param document
     * @param xpathExp
     * @return
     * @throws DocumentException
     */
    public static String getNodeValue(Document document, String xpathExp) {
        List elements = document.selectNodes(xpathExp);
        if(CollectionUtils.isEmpty(elements)){
            return null;
        }
        return elements.get(0).getText();
    }