package com.lonton.par;

import java.io.File;
import java.io.FileOutputStream;
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 XMLManage {

	private Document document= null;   //文檔對象
	private File file = null;          //xml文件
	private Element rootElement = null;//根節(jié)點
	
	public XMLManage(){
		
	}
	//通過xml文件，在創(chuàng)建對象是初始化屬性文檔對象，根節(jié)點和文件
    public XMLManage(File file){
    	init(file);
	}
    //初始化屬性文檔對象，根節(jié)點和文件
    private void init(File file){
    	try{
    		this.file = file;//初始化文件
    		SAXReader reader = new SAXReader();
            document  = reader.read(file);//初始化文檔		    
		   this.rootElement = this.document.getRootElement();//初始化根節(jié)點
    	}catch(DocumentException e){
    		e.printStackTrace();
    	}catch(NullPointerException e){
    		e.printStackTrace();
    	}
    }
    //重載構(gòu)造函數(shù)，以String類型對象作為參數(shù)
    public XMLManage(String fileName){   	
    	File file1 = new File(fileName);
    	init(file1);
	}
    	
	public  Element getElement(String name,String name2){
		Element element = null;
		try{
		   Element e = rootElement.element(name);
		   element = e.element(name2);
		}catch(Exception e){
			e.printStackTrace();
		}
		return element;
	}
	public  Element getElement(String name){
		Element element = null;
		
		try{
			element = document.getRootElement();
		}catch(Exception e){
			e.printStackTrace();
		}
		return element;
	}
	//得到子節(jié)點的值
	public String getChildElementValue(Element id,String name){
		String value = null;
		Element element = id.element(name);
		
		try{
			value = element.getText();
		}catch(Exception e){
			e.printStackTrace();
		}
		return value;
	}
	public void updateXML(){
		updateXML(this.document,this.file);
	}
	public void updateXML(Document document,File file){
		try{
			FileOutputStream os = new FileOutputStream(file);
			XMLWriter outp = new XMLWriter(os);
			outp.write(document);
	        outp.flush();
	        outp.close();
			}catch(Exception e){
				e.printStackTrace();
			}
	}
	
	//通過名稱和子節(jié)點的值得到節(jié)點
	public Element getElement(String name,String chileName,String childValue){
		Element element= null;
		try{
			
			List list = this.document.selectNodes(name);//得到所給名稱的所有節(jié)點
			Iterator iterator = list.iterator();
			String value = null;
			while(iterator.hasNext()){//迭代找要求的節(jié)點
				element = (Element)iterator.next();
				value = element.element(chileName).getText();
				if(value.equals(childValue)){//找到就跳出循環(huán)。
					break;
				}
			}
		}catch(Exception e){
			e.printStackTrace();
		}
		return element;
	}
	public Document getDocument() {
		return document;
	}
	public void setDocument(Document document) {
		this.document = document;
	}
	public String getFileName() {
		return file.getAbsolutePath();
	}
	public void setFileName(File file) {
		this.file = file;
	}
	
}