批量插入getGeneratedKeys()方法使用

本节内容涉及到的知识:JAXP的DOM方式解析XML文档 (后续还有SAX方式解析XML文档)1,获取document对象的模板代码2,将document写入到文件中去的模板代码3,xml编程:增(增加一个节点到xml文档中去);删(删除一个xml的节点);改(修改xml中某一个节点的内容);查(查询xml文档中某个节点中的内容)4,修改xml中某个节点的属性
//(1)获取一个节点里的内容@Testpublic void test01() throws ParserConfigurationException, SAXException, IOException{ //(1)获取Document解析器工厂类 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();//(2)使用Document解析器工场,创建一个Document解析器 DocumentBuilder builder = factory.newDocumentBuilder();//(3)使用Document解析器,解析xml文档,得到一个代表XML文档的document对象 Document document = builder.parse(new File("src/a.xml"));

NodeList ioList = document.getElementsByTagName("testappend"); Node node = ioList.item(0);
System.out.println(node.getTextContent());}
//(2)增加一个节点@Testpublic void test02() throws ParserConfigurationException, SAXException, IOException, TransformerException{ DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new File("src/a.xml"));

NodeList javaee = document.getElementsByTagName("javaee"); Node appNode = document.createElement("testappend");
appNode.setTextContent("这是一个添加节点的测试"); javaee.item(0).appendChild(appNode); //下面代码的目的:将内存中代表xml文档的document对象写到文件中去 //(1)获取一个转换器工厂

TransformerFactory factory2 = TransformerFactory.newInstance(); //(2)获取一个转换器 Transformer transformer = factory2.newTransformer(); //(3)使用转换器将内容写到文件中去 transformer.transform(new DOMSource(document), new StreamResult(new File("src/a.xml")));}//(3)删除一个节点@Testpublic void test03() throws ParserConfigurationException, SAXException, IOException, TransformerException{ DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document document = builder.parse(new File("src/a.xml"));

Node testappend = document.getElementsByTagName("testappend").item(0); testappend.getParentNode().removeChild(testappend);

TransformerFactory factory2 = TransformerFactory.newInstance(); Transformer transformer = factory2.newTransformer(); transformer.transform(new DOMSource(document), new StreamResult(new File("src/a.xml")));}
//(4)操作节点的属性@Testpublic void test04() throws ParserConfigurationException, SAXException, IOException, TransformerException{ DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document document = builder.parse(new File("src/a.xml"));

Node ioNode = document.getElementsByTagName("io").item(0); Element io = null; if(ioNode.getNodeType()==Node.ELEMENT_NODE){ io = (Element) ioNode; }
io.setAttribute("name", "ioName");

TransformerFactory factory2 = TransformerFactory.newInstance(); Transformer transformer = factory2.newTransformer(); transformer.transform(new DOMSource(document), new StreamResult(new File("src/a.xml")));
}

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