关于JAVA对XML文件的读写

XML读写有很多的方法~~

JAVA中有丰富的类对XML文件进行操作~~比如XMLReader....JDOM...DOM等等~~

以下是我从网上资料找到，并进行试验成功的例子~~

采用的是DOM~~~并不需要下载其他的包~~

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class JavaXML {

public static void main(String[] args) throws ParserConfigurationException, TransformerException {

DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();//文件工厂初始化

DocumentBuilder db=dbf.newDocumentBuilder();

Document doc=db.newDocument();//创建一个Document实例

Element customers=doc.createElement("customers");

Element customer=doc.createElement("customer");

Element customerID=doc.createElement("customerID");

Element customerName=doc.createElement("customerName");

customerID.appendChild(doc.createTextNode("123"));

customerName.appendChild(doc.createTextNode("zjj"));

customer.appendChild(customerID);

customer.appendChild(customerName);

customers.appendChild(customer);

doc.appendChild(customers);//将子节点添加到根节点，实际上doc是这个XML的根节点

TransformerFactory tff=TransformerFactory.newInstance();//解析器初始化

Transformer tformer=tff.newTransformer();

tformer.transform(new DOMSource(doc), new StreamResult("d://test.xml"));

}

}

这是写XML的过程~~~下面是读取XML的过程

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

public class ReadXML{

public static void main(String[] args) throws ParserConfigurationException, IOException, SAXException{

String customerID=null;

String customerName=null;

DocumentBuilderFactory domfac=DocumentBuilderFactory.newInstance();

DocumentBuilder dombuilder=domfac.newDocumentBuilder();//需要SAXException异常

InputStream is=new FileInputStream("d://test.xml");

Document doc=dombuilder.parse(is);

Element root=doc.getDocumentElement();//获取根节点

NodeList customer=root.getChildNodes();//获取子节点，是个集合

for(int i=0;i<customer.getLength();i++){

Node info=customer.item(i);

for(Node node=info.getFirstChild();node!=null;node=node.getNextSibling()){

if(node.getNodeType()==Node.ELEMENT_NODE){

if(node.getNodeName().equals("customerID")){

customerID=node.getFirstChild().getNodeValue();

}

if(node.getNodeName().equals("customerName")){

customerName=node.getFirstChild().getNodeValue();

}

}

}

}

System.out.println(customerID);

System.out.println(customerName);

}

}

这是我个人的经验~~~

很好用~~对XML的读写很方便~~~

大家可以去尝试下~~