maven依赖

          <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
          </dependency>

• 读取String类型XML

 private static Map<String, String> anaylisXml(String xmlStr) throws Exception {

        
        Document document = DocumentHelper.parseText(xmlStr);

        Map<String, String> resultMap = new HashMap<String, String>();

        org.dom4j.Element root = document.getRootElement();

        // 获取root节点下的子节点，参数为节点的name
        root.element("");
        // 获取root节点下的所有子节点集合，返回Iterator，方便遍历
        root.elementIterator();
        // 获取root节点下的特定节点集合，返回List，方便遍历
        root.elements("");

        for (Iterator<?> i = root.elementIterator(); i.hasNext();) {

            Element element = (Element) i.next();

            String name = element.getName();

            String value = element.getStringValue();

            resultMap.put(name, element.getTextTrim());

        }
        return resultMap;

    }

• 读取URL类型XML 

private static Map<String, String> anaylisXml(String xmlUrl) throws Exception {

        Map<String, String> resultMap = new HashMap<String, String>();

        SAXReader reader = new SAXReader();

        Document document = reader.read(new File(xmlUrl));

        org.dom4j.Element root = document.getRootElement();

        // 获取root节点下的子节点，参数为节点的name
        root.element("");
        // 获取root节点下的所有子节点集合，返回Iterator，方便遍历
        root.elementIterator();
        // 获取root节点下的特定节点集合，返回List，方便遍历
        root.elements("");

        for (Iterator<?> i = root.elementIterator(); i.hasNext();) {

            Element element = (Element) i.next();

            String name = element.getName();

            String value = element.getStringValue();

            resultMap.put(name, element.getTextTrim());

        }
        return resultMap;

    }

写

public static void toXmlByDOM4J(String xmlPath){

        Document document = DocumentHelper.createDocument();
        Element rootElement = document.addElement("empnames");
        Element empName = rootElement.addElement("empname");
        empName.setText("xie");
        Element empAge = rootElement.addElement("age");
        empAge.setText("25");
        Element empTitle = rootElement.addElement("title");
        empTitle.setText("软件开发");

        //写入文档
        writerDocumentToNewFile(document,xmlPath);

        String documentStr = document.asXML();

        System.out.println(documentStr);

    }

    private static void writerDocumentToNewFile(Document document,String xmlPath) {
        try {
            OutputFormat xmlFormat = new OutputFormat();
            xmlFormat.setEncoding("UTF-8");
            xmlFormat.setNewlines(true);
            xmlFormat.setIndent("      ");
            FileWriter fileWriter = new FileWriter(new File(xmlPath));
            XMLWriter xmlWriter = new XMLWriter(fileWriter,xmlFormat);
            xmlWriter.write(document);
            xmlWriter.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }