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";  //1
	public  String FebruaryNum="0"; //2
	public  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 block
				e.printStackTrace();
			}

			Document Doc = null;
			try {
				Doc = builder.parse(xmlfile);
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.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 block
				e.printStackTrace();
			}
			
	  }
	  
	  
	  
	  
}