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xml

2013年02月05日 ⁄ 综合 ⁄ 共 3263字 ⁄ 字号 评论关闭

package com.test;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory;  
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPathConstants; 
import javax.xml.xpath.XPathExpression;  
 
import org.w3c.dom.Document; 
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class Xml {
 public static void main(String[] args) {
  
  try{
   
  
       DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
                      factory.setNamespaceAware(true); // never forget this! 
                       DocumentBuilder builder = factory.newDocumentBuilder(); 
                       Document doc = builder.parse("src/com/test/a.xml"); 
        
                       XPathFactory pathFactory = XPathFactory.newInstance(); 
        
                       XPath xpath = pathFactory.newXPath(); 
        
                       XPathExpression pathExpression = xpath 
                                       .compile("//@href"); 
        
                      
                       Node nodeUpdate = null;
                       Object result = pathExpression.evaluate(doc, XPathConstants.NODESET); 

        
                       String strId ="";
                       NodeList nodes = (NodeList) result; 
                       for (int i = 0; i < nodes.getLength(); i++) { 
                               String str= nodes.item(i).getNodeValue();
                               strId = str.substring(str.indexOf("#")+1); 
                               System.out.println(strId);
                               nodeUpdate = nodes.item(i);
                               nodeUpdate.setNodeValue("bbbb");
                       }
                      
                      
//                       String newStr = "src/com/test/a.xml"; 
//                   
//                         
//                           XmlWriter writer = new XMLWriter(new FileWriter(new File(newStr))); 

//                        
//                          writer.write(doc); 
//                        
//                           writer.close(); 
//                      
                        
               
                      
                      
                      
//                      
//                       Document document = builder.parse("src/com/test/b.xml"); 

//                       String str= "//*[@id='"+strId+"']";
//                       XPathExpression pathExpression_b = xpath 
//                                  .compile(str);
//                      
//                      
//                       Object result_b = pathExpression_b.evaluate(document, XPathConstants.NODESET); 

//                       NodeList nodes_b = (NodeList) result_b; 
//                       for (int i = 0; i < nodes_b.getLength(); i++) { 
//                         Node objNode = nodes_b.item(i);
//                       
//                               String str1= nodes_b.item(i).getNodeName();
//                               String str2 = nodes_b.item(i).getTextContent();
//
//                        
//                       }
//                      
                      
         

  }catch(Exception e){
   e.printStackTrace();
   
  }
  
 }

}

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