使用JAXP对xml文档进行Dom解析(二)
w DOMSource(document), new StreamResult(new FileOutputStream("src/book.xml")));
}
//向xml文档中指定位置插入节点：<售价>59.00元
@Test
public void add2() throws Exception{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse("src/book.xml");
//创建节点
Element price = document.createElement("售价");
price.setTextContent("59.00元");
//得到参考节点
Element refNode = (Element) document.getElementsByTagName("售价").item(0);
//得到挂崽的节点
Element book = (Element) document.getElementsByTagName("书").item(0);
//往book节点的指定位置挂崽
book.insertBefore(price, refNode);
//把更新后的内存写回到xml文档
TransformerFactory tffactory = TransformerFactory.newInstance();
Transformer tf = tffactory.newTransformer();
tf.transform(new DOMSource(document), new StreamResult(new FileOutputStream("src/book.xml")));
}
//向xml文档节点上添加属性：<书名>
Java就业培训教程上添加name="xxxx"属性
@Test
public void addAttr() throws Exception{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse("src/book.xml");
Element bookname = (Element) document.getElementsByTagName("书名").item(0);
bookname.setAttribute("name", "xxxx");
//把更新后的内存写回到xml文档
TransformerFactory tffactory = TransformerFactory.newInstance();
Transformer tf = tffactory.newTransformer();
tf.transform(new DOMSource(document), new StreamResult(new FileOutputStream("src/book.xml")));
}
@Test
public void delete1() throws Exception{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse("src/book.xml");
//得到要删除的节点
Element e = (Element) document.getElementsByTagName("售价").item(0);
//得到要删除节点的爸爸
Element book = (Element) document.getElementsByTagName("书").item(0);
//爸爸再删崽
book.removeChild(e);
//把更新后的内存写回到xml文档
TransformerFactory tffactory = TransformerFactory.newInstance();
Transformer tf = tffactory.newTransformer();
tf.transform(new DOMSource(document), new StreamResult(new FileOutputStream("src/book.xml")));
}
//删除整个xml文档
@Test
public void delete2() throws Exception{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse("src/book.xml");
//得到要删除的节点
Element e = (Element) document.getElementsByTagName("售价").item(0);
e.getParentNode().getParentNode().getParentNode().removeChild(e.getParentNode().getParentNode());
//把更新后的内存写回到xml文档