java xml dom4j 创建 修改 解析


注:需要dom4j的jar包

package dom.parse;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

public class Dom4jTest {

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

    String fileName ="src/dom/parse/dom4j.xml";

    //createXml(fileName);

    //modifyXml(fileName);

    parseXml(fileName);

 

 }

 private static void parseXml(String fileName) throws DocumentException {

       SAXReader reader = new SAXReader();

       Document document = reader.read(fileName);

      

       List<Book> bookList = new ArrayList<Book>();

    

      

       Book book = new Book();

       Element root = document.getRootElement();

  for (Iterator books = root.elementIterator(); books.hasNext();) {

   

   Element bookElement = (Element)  books.next();

  

   String bookId=bookElement.attributeValue("bookId");

   Element shumingE=bookElement.element("shuming");

   String shuming=shumingE.getText();

  

   String shumingId=null;

   if(shumingE.attributes() != null)

   {

     shumingId=shumingE.attributeValue("shumingId");

     book.setShumingId(shumingId);

   }

  

  

   String zuozhe=bookElement.element("zuozhe").getText();

   String shoujia=bookElement.element("shoujia").getText();

  

   book.setBookId(bookId);

   book.setShuming(shuming);

   book.setZuozhe(zuozhe);

   book.setShoujia(shoujia);

  

   bookList.add(book);

 }

 

  System.out.println(bookList); 

 }

 private static void modifyXml(String fileName) throws DocumentException, IOException {

  SAXReader reader =new SAXReader();

  Document document = reader.read(fileName);

  

  Element root = document.getRootElement();

  

  Element book =(Element) root.elements("shu").get(1);

  String bookValue =book.attributeValue("bookId");

  System.out.println(bookValue);

  

  

  String value =  book.element("shuming").getText();

  System.out.println(value);

  

  String attrValue =book.element("shuming").attribute("shumingId").getValue();

  System.out.println(attrValue);

  

  

  Element book1 =(Element) root.elements("shu").get(0);

  book1.addElement("shoujia").setText("duiwaimai209");

  

  OutputFormat format = OutputFormat.createPrettyPrint();

  XMLWriter writer = new XMLWriter(new FileWriter(fileName),format);

  writer.write(document);

  writer.close();

  

  

  

 }

 public static void createXml(String fileName) throws IOException  {

  Document document = DocumentHelper.createDocument();

  Element root = document.addElement("shujia");

  

  Element book1=root.addElement("shu");

  book1.addElement("shuming").setText("zhangxiaoxiangjava");

  book1.addElement("zuozhe").setText("zhangxiaoxiang");

  book1.addElement("shoujia").setText("109");

  book1.addAttribute("bookId","1").addAttribute("baozhuang","jingzhuang");

  

  Element book2=root.addElement("shu");

  book2.addElement("shuming").setText("weigejava");

  book2.addElement("zuozhe").setText("weige");

  book2.addElement("shoujia").setText("79");

  book2.addAttribute("bookId","2");

  

  OutputFormat format = OutputFormat.createPrettyPrint();

  XMLWriter writer = new XMLWriter(new FileWriter(fileName),format);

  writer.write(document);

  writer.close();

 }

}