Java org.w3c.dom 解析xml

1.加载xml文件获取document对象。

public static Document load(String filename) {
	        Document document = null;
	        try {
	            DocumentBuilderFactory factory = DocumentBuilderFactory
	                    .newInstance();
	            DocumentBuilder builder = factory.newDocumentBuilder();
	            document = builder.parse(new File(filename));
	            document.normalize();
	        } catch (Exception ex) {
	            ex.printStackTrace();
	        }
	        return document;
	    }

 

2.解析xml

 public static void xmlUpdateStrings(HashMap<String, Object> map,String path) {
	        Document document = load(path);
	        Node root = document.getDocumentElement();
	        if (root.hasChildNodes()) {
	        	//获取跟节点下所有元素
	            NodeList ftpnodes = root.getChildNodes();
	            for (int i = 0; i < ftpnodes.getLength(); i++) {
	            	 Node nd = ftpnodes.item(i);
	            	 //判断加点元素名称和类型
	            	 if(nd!=null&&nd.getNodeType()!=nd.COMMENT_NODE&&nd.getNodeName()=="string"){
	            		 //获取节点下所有属性
	            		 NamedNodeMap aMap=nd.getAttributes();
	            		 //获取节点中名称为name属性对象
		            	 Node attr=aMap.getNamedItem("name");
		            	 //获取属性值
		            	 String app_name=attr.getNodeValue();
		                 if(attr!=null&&"app_name".equals(app_name)){
		                	 //修改对应节点值
		                	 nd.getFirstChild().setNodeValue(map.get("app_name").toString()); //修改节点值
		                 }
		                 
	            	 }
	            }
	        }
	        doc2XmlFile(document, path);
	    }

 3.将document对象写入对应地址文件

 public static boolean doc2XmlFile(Document document, String filename) {
	        boolean flag = true;
	        try {
	           
	            TransformerFactory tFactory = TransformerFactory.newInstance();
	            Transformer transformer = tFactory.newTransformer();
	           
	            // transformer.setOutputProperty(OutputKeys.ENCODING, "GB2312");
	            DOMSource source = new DOMSource(document);
	            StreamResult result = new StreamResult(new File(filename));
	            transformer.transform(source, result);
	        } catch (Exception ex) {
	            flag = false;
	            ex.printStackTrace();
	        }
	        return flag;
	    }

 4.xml文件格式

<?xml version="1.0" encoding="utf-8" standalone="no"?><resources>
    <string name="hello">Hello World, DHotelActivity!</string>
    <string name="app_name">00000000000</string> (被修改的节点值)
    <string name="more">更多</string>
    <string name="nodata">暂无数据</string>
    <string name="about">关于道有道</string>
    <string name="toast_noresult">抱歉，未找到结果</string>
    <string name="beijing">北京</string>

</resources>