DOM4J处理XML方法记录，附XPATH写法

Java代码  

package com.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.dom4j.Attribute;
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;
import com.baje.sz.util.Doc;

public class Dom4jSoap {

    /**
     * 取根元素
     * @param path
     * @return
     * @throws DocumentException
     */
    public static Element getRoot(String path) throws DocumentException{
        Document document;
        SAXReader reader=new SAXReader();
        document=reader.read(new File(path));
        Element root=document.getRootElement();
        return root;
    }
    public static void readSoap(Element element){
        if(element.elements().size()==0){
            System.out.println(element.getName()+"*="+element.getText());
            return;
        }

        for (Iterator<Element> iter=element.elementIterator();iter.hasNext();) {
            Element ele=iter.next();
            if(ele.getParent().getName().equalsIgnoreCase("Envelope")){
                System.out.println("-------------------------Envelope的直接子元素:"+ele.getName()+",,"+ele.attributeValue("xmlns"));

            }
            System.out.println(ele.getName()+"%="+ele.getText().trim());
            if(ele.elements().size()!=0){
                System.out.println(("element "+ele.getName()+" has "+ele.elements().size())+(ele.elements().size()==1?" subTag it is ":" subTags there are"));
                readSoap(ele);
            }
            if(ele.getName().equals("UserName")){
                System.out.println("path="+ele.getPath());
            }
        }
    }
    /**
     * 获取节点的元素的值
     * @param filename
     * @param xmlpath="//*[name()='Date'][@id='aa']/*[name()='aaa']"
     * @return
     */
    public static String getElementText(String filename, String xmlpath,String encode) {
        try {
            Document document;
            SAXReader reader=new SAXReader();
            InputStream in = new FileInputStream(new File(filename));
            document=reader.read(in,encode);
            List list = document.selectNodes(xmlpath);
            for(Iterator iter = list.iterator();iter.hasNext();){
                Element e = (Element)iter.next();
                return e.getText();
            }
            return "";
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }
    /**
     * 取指定节点元素的属性的值
     * @param filename
     * @param xmlpath="//*[name()='Date'][@id='bb']/@ac"
     * @param encode
     * @return
     */
    public static String getAttributesText(String filename, String xmlpath,String encode){
        try {
            Document document;
            SAXReader reader=new SAXReader();
            InputStream in = new FileInputStream(new File(filename));
            document=reader.read(in,encode);
            List list = document.selectNodes(xmlpath);
            for(Iterator iter=list.iterator();iter.hasNext();){
                Attribute a = (Attribute)iter.next();
                return a.getText();
            }
            return "";
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }