标签:str tran == one 工厂 类型 document 文本 遍历
jaxp是javase的一部分,就是jdk中的一部分
javax.xml.parsers包
DocumentBuilder
DocumentBuilderFactory
SAXParser
SAXParserFactory
1、添加节点 //1、创建解析器工厂 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); //2、创建解析器 DocumentBuilder builder = builderFactory.newDocumentBuilder(); //3、解析xml,返回document Document doc = builder.parse("./src/main/resources/persons.xml"); //4、得到第一个person标签 Node person = doc.getElementsByTagName("person").item(0); //5、创建sex标签 createElement Element sex = doc.createElement("sex"); //6、创建文本 createTextNode Text text = doc.createTextNode("男"); //7、把文本添加到sex标签下面 appendChild sex.appendChild(text); //8、把sex标签添加到第一个person下面 person.appendChild(sex); //9、回写 TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); transformer.transform(new DOMSource(doc),new StreamResult("./src/main/resources/persons.xml")); 2、修改节点 //1、创建解析器工厂 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); //2、创建解析器 DocumentBuilder builder = builderFactory.newDocumentBuilder(); //3、解析xml,返回document Document doc = builder.parse("./src/main/resources/persons.xml"); //4、得到第一个person标签 Node sex = doc.getElementsByTagName("sex").item(0); //5、修改sex标签 setTextContext() sex.setTextContent("女"); //6、回写 TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); transformer.transform(new DOMSource(doc),new StreamResult("./src/main/resources/persons.xml")); 3、删除节点 //1、创建解析器工厂 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); //2、创建解析器 DocumentBuilder builder = builderFactory.newDocumentBuilder(); //3、解析xml,返回document Document doc = builder.parse("./src/main/resources/persons.xml"); //4、得到第一个sex标签 Node sex = doc.getElementsByTagName("sex").item(0); //5、获取sex的父节点 Node person = sex.getParentNode(); //6、使用父节点删除 removeChild() person.removeChild(sex); //7、回写 TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); transformer.transform(new DOMSource(doc),new StreamResult("./src/main/resources/persons.xml")); 4、遍历节点 public static void queryList() throws ParserConfigurationException, IOException, SAXException { //1、创建解析器工厂 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); //2、创建解析器 DocumentBuilder builder = builderFactory.newDocumentBuilder(); //3、解析xml返回document Document doc = builder.parse("./src/main/resources/persons.xml"); //4、递归遍历 RecursiveNodeList(doc); } private static void RecursiveNodeList(Node node) { //判断是元素类型才打印 if (node.getNodeType()==Node.ELEMENT_NODE){ System.out.println(node.getNodeName()); } //得到当前节点的子节点集合 NodeList nodeList = node.getChildNodes(); //遍历 for (int i= 0;i<nodeList.getLength();i++){ RecursiveNodeList(nodeList.item(i)); } }
标签:str tran == one 工厂 类型 document 文本 遍历
原文地址:https://www.cnblogs.com/linghuchenchen/p/13194222.html