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 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"));
      }
}   

 

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~~