Web. xml file:<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><servlet><servlet-name>dwr</servlet-name><servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class><init-param><param-name>debug</param-name><param-value>true</param-value></init-param></servlet><servlet-mapping><servlet-name>dwr</servlet-name><url-pattern>/dwr/*</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>
DWR. xml file<?xml version="1.0" encoding="UTF-8"?><dwr><allow> <create creator="new" javascript="bankService"> <param name="class" value="com.xihangzh.xml.XmlService"/> </create> <convert converter="bean" match="com.xihangzh.xml.Bank"/></allow></dwr>
Bank.html File<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
Xmlservice classpackage com.xihangzh.xml;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.OutputStreamWriter;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;public class XmlService {private static Document document;static{System.out.println("this is static!!!");SAXReader reader = new SAXReader();File file = new File("d:/test.xml");try {document = reader.read(file);} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public Bank getBankById(int id) {Element root = document.getRootElement();Bank bank = null;for(Iterator<Element> iter = root.elementIterator(); iter.hasNext(); ) {Element child = iter.next();if(String.valueOf(id).equals(child.element("id").getText())) {bank = new Bank(); bank.setId(Integer.parseInt(child.element("id").getText())); bank.setIde(child.element("ide").getText()); bank.setName(child.element("name").getText()); bank.setAddress(child.element("address").getText()); bank.setScale(child.element("scale").getText());}}return bank;}public String delBank(int id) {Element root = document.getRootElement();String flag = "didn't deleted";for(Iterator<Element> iter = root.elementIterator(); iter.hasNext(); ) { Element child = iter.next(); if(String.valueOf(id).equals(child.element("id").getText())) { root.remove(child); this.persistentBank(document); flag = "deleted"; } }return flag;}public List getList(){ Element root = document.getRootElement(); List<Bank> bankList = new ArrayList<Bank>(); for(Iterator<Element> iter = root.elementIterator(); iter.hasNext(); ) { Element child = iter.next(); Bank bank = new Bank(); bank.setId(Integer.parseInt(child.element("id").getText())); bank.setIde(child.element("ide").getText()); bank.setName(child.element("name").getText()); bank.setAddress(child.element("address").getText()); bank.setScale(child.element("scale").getText()); bankList.add(bank); } return bankList;}public String add(Bank bank) {Element root = document.getRootElement();Element newBank = root.addElement("bank");newBank.addElement("id").setText(String.valueOf(bank.getId()));newBank.addElement("ide").setText(bank.getIde());newBank.addElement("name").setText(bank.getName());newBank.addElement("address").setText(bank.getAddress());newBank.addElement("scale").setText(bank.getScale());persistentBank(document);return "add success";}public String modify(Bank bank) {Element root = document.getRootElement();String flag = "modify failed";for(Iterator<Element> iter = root.elementIterator(); iter.hasNext(); ) {Element child = iter.next();if(String.valueOf(bank.getId()).equals(child.element("id").getText())) {child.element("ide").setText(bank.getIde());child.element("name").setText(bank.getName());child.element("address").setText(bank.getAddress());child.element("scale").setText(bank.getScale());persistentBank(document);flag = "modify successed";}}return flag;}private void persistentBank(Document document){try {XMLWriter write = new XMLWriter(new OutputStreamWriter(new FileOutputStream("d:/test.xml"), "UTF-8"));write.write(document);write.flush();write.close();} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (FileNotFoundException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}}XML file to save<? XML version = "1.0" encoding = "UTF-8"?> <Banks banksatt = "A"> <bank bankatt = "hello"> <ID Haha = "Haha"> 1 </ID> <ide> A </ide> <name = "Hua"> Agricultural Bank </Name> <address> Haidian District </address> <scale> large </scale> </Bank> <bank> <ID> 4 </ id> <ide> B </ide> <Name> China Merchants Bank </Name> <address> Changping District </address> <scale scaleatt = "5"> middle </scale> </Bank> <bank> <ID> 5 </ID> <ide> C </ide> <Name> Industrial and Commercial Bank </Name> <address> Chaoyang District </address> <Scale> little </scale> </Bank> </banks>The entire project structure is as follows:
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