java jaxp_java解析xml数据（使用jaxp的方式）
packageng.www.jaxp;importjava.io.IOException;importjavax.xml.parsers.DocumentBuilder;importjavax.xml.parsers.DocumentBuilderFactory;importjavax.xml.parsers.ParserConfigurationException;importjavax.xml.transform.Transformer;importjavax.xml.transform.TransformerConfigurationException;importjavax.xml.transform.TransformerException;importjavax.xml.transform.TransformerFactory;importjavax.xml.transform.dom.DOMSource;importjavax.xml.transform.stream.StreamResult;importorg.w3c.dom.Document;importorg.w3c.dom.Element;importorg.w3c.dom.Node;importorg.w3c.dom.NodeList;importorg.w3c.dom.Text;importorg.xml.sax.SAXException;/*** 实现jaxp操作xml
*@authorWangWeiWei
**/
public classTestJaxp {/***@paramargs
*@throwsParserConfigurationException
*@throwsIOException
*@throwsSAXException
*@throwsTransformerException*/
public static void main(String[] args) throwsParserConfigurationException, SAXException, IOException, TransformerException {//addNode();//editNode();//deleteNode();//selectSin();
transervalNode();//selectAll();
}private static void transervalNode() throwsParserConfigurationException, SAXException, IOException {/** 此处是遍历xml的节点*/DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=builderFactory.newDocumentBuilder();
Document document=builder.parse("src/person.xml");//编写一个方法实现遍历操作
list1(document);
}private static voidlist1(Node node) {if(node.getNodeType()==Node.ELEMENT_NODE){
System.out.println(node.getNodeName());
}//得到一层子节点
NodeList nodelist=node.getChildNodes();for(int i=0;i
Node node1=nodelist.item(i);
list1(node1);
}
}private static void deleteNode() throwsParserConfigurationException, SAXException, IOException, TransformerException {/** 此处是删除xml的节点*/DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=builderFactory.newDocumentBuilder();
Document document=builder.parse("src/person.xml");//获取sex元素
Node node=document.getElementsByTagName("sex").item(0);
Node parentNode=node.getParentNode();
parentNode.removeChild(node);//回写到本地xml文件中
TransformerFactory factory=TransformerFactory.newInstance();
Transformer former=factory.newTransformer();
former.transform(new DOMSource(document), new StreamResult("src/person.xml"));
}private static void editNode() throwsParserConfigurationException, SAXException, IOException, TransformerException {/** 编辑xml数据(修改sex下的文本数据为nan)
* 使用sexTextContent方法*/DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=builderFactory.newDocumentBuilder();
Document document=builder.parse("src/person.xml");//获取sex的节点
Node sexNode = document.getElementsByTagName("sex").item(0);
sexNode.setTextContent("nan");//内存中已经修改完毕，现在需要将内存中的数据回写到本地xml文件中才会生效
TransformerFactory factory=TransformerFactory.newInstance();
Transformer former=factory.newTransformer();
former.transform(new DOMSource(document), new StreamResult("src/person.xml"));
}private static void addNode() throwsParserConfigurationException, SAXException, IOException, TransformerException{/** 这里操作需要会写xml，要不然只是在内存中修改了xml数据，本地文件不会有改变*/DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=builderFactory.newDocumentBuilder();
Document document=builder.parse("src/person.xml");
Node node=document.getElementsByTagName("p1").item(0);
Element element=document.createElement("sex");
Text text= document.createTextNode("nv");
element.appendChild(text);
node.appendChild(element);//会写xml数据到本地中
TransformerFactory formerFactory=TransformerFactory.newInstance();
Transformer former=formerFactory.newTransformer();
former.transform(new DOMSource(document), new StreamResult("src/person.xml"));
}private static void selectSin() throwsParserConfigurationException, SAXException, IOException{/** 1.创建解析器工厂
* 2.根据解析器工厂创建解析器
* 3.解析xml，返回document
* 4.得到所有的name元素
* 5.利用返回的集合里面的item(0)来获得第一个name元素
* 6.使用getTextContext方法来获得具体的值*/
//创建解析器工厂
DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();//根据解析器工厂创建一个解析器
DocumentBuilder builder=builderFactory.newDocumentBuilder();//根据解析器来返回xml的document对象
Document document=builder.parse("src/person.xml");//根据document对象来获取所有的name元素，然后利用item(0)获取第一个元素
Node node=document.getElementsByTagName("name").item(1);
String s=node.getTextContent();
System.out.println(s);
}private static void selectAll() throwsParserConfigurationException,
SAXException, IOException {//查询xml中所有标签为name的值
/** 1.创建解析器工厂
* 2.根据解析器工厂创建解析器
* 3.解析xml返回document
* 4.得到所有的name元素
* 5.遍历集合，得到每一个name元素*/
//创建解析器工厂
DocumentBuilderFactory builderFactory=DocumentBuilderFactory.newInstance();//创建解析器
DocumentBuilder builder=builderFactory.newDocumentBuilder();//解析xml返回document
Document document= builder.parse("src/person.xml");
NodeList list= document.getElementsByTagName("sex");//遍历开始
for(int i=0;i
Node name1=list.item(i);//得到那么里面元素的值
String nametext=name1.getTextContent();
System.out.println(nametext);
}
}
}