【转载】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 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);      
}
}
这是读XML的过程~~~下面是写XML的过程

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"));      
}
}   

很好用~~对XML的读写很方便~~~

大家可以去尝试下~~