求java写xml文件代码

Question

incorrect .jar in your classpath.

Answer 1

you don't need include any .jar if you are using jdk1.4

Answer 2

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
public class OperationXMLFile extends Object{    public static void main(String[] args) throws Exception{
        OperationXMLFile.createXMLDoc();
    }
    
    public static void createXMLDoc() throws Exception{
       
      String ordersFile = "orders.xml";
        
     //Create the XML document
     Document ordersDoc = null;
      try {
       //Instantiate the parser and parse the file
       DocumentBuilderFactory docbuilderfactory = DocumentBuilderFactory.newInstance();
       DocumentBuilder docbuilder = docbuilderfactory.newDocumentBuilder();
       ordersDoc = docbuilder.parse(ordersFile); 
       
       Element ordersRoot = ordersDoc.getDocumentElement();
       NodeList orders = ordersRoot.getElementsByTagName("order");
       for (int i = 0; i < orders.getLength(); i++) {
          //For each order, get the order element
            Element thisOrder = (Element)orders.item(i);

            String thisOrderid = thisOrder.getAttribute("orderid");
            System.out.println("Order: " + thisOrderid);

            //Get customer information
            String thisCustomerid = thisOrder.getElementsByTagName("customerid")
                                               .item(0)
                                               .getFirstChild().getNodeValue();
            System.out.println("Customer: " + thisCustomerid); //Loop through each product for the order
          NodeList products = thisOrder.getElementsByTagName("product");
          for (int j=0; j < products.getLength(); j++) {
              
              Element thisProduct = (Element)products.item(j);                //Get product information from attributes and child
               //elements
               String thisProductid = thisProduct.getAttribute("productid");
               System.out.println("  Product: " + thisProductid);

               String priceStr = thisProduct.getElementsByTagName("price")
                                               .item(0)
                                               .getFirstChild().getNodeValue();
               System.out.println("  Price: " + priceStr);                String qtyStr = thisProduct.getElementsByTagName("qty")
                                               .item(0)
                                               .getFirstChild().getNodeValue();
               System.out.println("  Quantity: " + qtyStr);
               System.out.println();

          }
          
        }
        } catch (Exception e) {
           System.out.println("Cannot read the orders file: "+e.getMessage());
        }
    }
}