JAVA 简单操作XML 写值读值

package com.cms.action;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.Writer;import java.text.SimpleDateFormat;import java.util.Date;import javax.servlet.http.HttpSession;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.apache.struts2.ServletActionContext;import org.w3c.dom.Document;import org.w3c.dom.Element;public class TestAction {public static int count=0;public String JanuaryNum="0"; //1public String FebruaryNum="0"; //2public String MarchNum="0"; //3//public String AprilNum="0"; //4//public String MayNum="0"; //5//public String JuneNum="0"; //6//public String JulyNum="0"; //7//public String AugustNum="0"; //8//public String SeptemberNum="0";//9//public String OctoberNum="0"; //10//public String NovemberNum="0";//11//public String DecemberNum="0";//12 public String execute() throws Exception {System.out.println("ok..!!!!"+getNowMonth());System.out.println("====>"+done());intodata();return null;} //得到当前月； public static String getNowMonth() { SimpleDateFormat formatter = new SimpleDateFormat("MM"); return formatter.format(new Date()); } //得到当前日期； public static String getDate() { SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss"); return formatter.format(new Date()); } public String path = ServletActionContext.getServletContext().getRealPath("/test/Count.xml"); //用XML存值标记； public String done (){ if (path != null && path.length() > 0) {File xmlfile = new File((new File("") + path));DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = null;try {builder = factory.newDocumentBuilder();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}Document Doc = null;try {Doc = builder.parse(xmlfile);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}//String Driver = Doc.getElementsByTagName("total").item(0).getFirstChild().getNodeValue();System.out.println("come in...");//3月数据；if(getNowMonth().equals("03")){String Driver = Doc.getElementsByTagName("ABO").item(0).getFirstChild().getNodeValue();System.out.println("month03:->" + Driver); if(Driver!=null){ count=Integer.parseInt(Driver)+1; MarchNum=String.valueOf(count); //String message=Driver;//Integer.parseInt(Driver);// 得到XML中的值； //HttpSession session = ServletActionContext.getRequest().getSession(); //session.setAttribute("message", message); return MarchNum; }}} else {System.out.println("path error!! or path is null !!");} return "error"; } //写值到XML public void intodata() throws IOException, TransformerException{DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();DocumentBuilder bf;try { bf = dbf.newDocumentBuilder(); Document doc = bf.newDocument(); Element cat = doc.createElement("total"); //创建子目录；1~12 month; Element January = doc.createElement("January");//一月； Element Two=doc.createElement("two");//two Element ABO =doc.createElement("ABO5"); Element ACS =doc.createElement("ACS4"); Element ABO1 =doc.createElement("ABO1"); Element ACS1 =doc.createElement("ACS2"); // String n=String.valueOf((Integer.parseInt(name))); //创建子目录； doc.appendChild(cat);//total cat.appendChild(January);//1 cat.appendChild(Two); //一月子目录； January.appendChild(ABO1); January.appendChild(ACS1); Two.appendChild(ABO); Two.appendChild(ACS); //写入值到子目录下； ABO1.appendChild(doc.createTextNode(JanuaryNum));//1 ACS1.appendChild(doc.createTextNode(JanuaryNum)); ABO.appendChild(doc.createTextNode(JanuaryNum));//1 ACS.appendChild(doc.createTextNode(JanuaryNum));TransformerFactory tff = TransformerFactory.newInstance();Transformer tf = tff.newTransformer();Writer out = new FileWriter(path);tf.transform(new DOMSource(doc), new StreamResult(out));out.close();} catch (ParserConfigurationException e) {// TODO Auto-generated catch blocke.printStackTrace();} } }