Java递归遍历XML所有元素。

Java递归遍历XML所有元素

    做一个递归遍历XML的例子，为更为复杂的解析工作做基础。

    目标：遍历所有的元素节点，并且取出来其中的值，结果打印到控制台。

    源代码如下：         本程序依赖DOM4j包

 

import org.dom4j.Document;

import org.dom4j.DocumentHelper;

import org.dom4j.DocumentException;

import org.dom4j.Element;



import java.util.*;







/**



* Created by IntelliJ IDEA.




* User: leizhimin




* Date: 2008-4-14 14:02:12




* Note: Java递归遍历XML所有元素



*/



public class XmlTest {







//    private static Map xmlmap = new HashMap();



    //存储xml元素信息的容器



    private static List elemList = new ArrayList();







    //要测试的xml对象



    private static String srcXml = "/n" +



            "/n" +



            "    /n" +



            "        某人/n" +



            "                    /n" +



            "            /n" +



            "                10002/n" +



            "                西安市太白路/n" +



            "            /n" +



            "            /n" +



            "                10002/n" +



            "                空ID节点啊/n" +



            "            /n" +



            "            /n" +



            "                10002/n" +



            "                空ID节点啊/n" +



            "            /n" +



            "/t/t/t/n" +



            "/t/t/t/t/n" +



            "                西安市太白路2/n" +



            "            /n" +



            "/t/t/n" +



            "    /n" +



            "    /n" +



            "        ASDF/n" +



            "    /n" +



            "";







    public static void main(String args[]) throws DocumentException {



        XmlTest test = new XmlTest();



        Element root = test.getRootElement();



        test.getElementList(root);



        String x = test.getListString(elemList);







        system.out.println("-----------原xml内容------------");



        system.out.println(srcXml);



        system.out.println("-----------解析结果------------");



        system.out.println(x);







    }







    /**



     * 获取根元素



     *



     * @return



     * @throws DocumentException



     */



    public Element getRootElement() throws DocumentException {



        Document srcdoc = DocumentHelper.parseText(srcXml);



        Element elem = srcdoc.getRootElement();



        return elem;



    }







    /**



     * 递归遍历方法



     *



     * @param element



     */



    public void getElementList(Element element) {



        List elements = element.elements();



        if (elements.size() == 0) {



            //没有子元素



            String xpath = element.getPath();



            String value = element.getTextTrim();



            elemList.add(new Leaf(xpath, value));



        } else {



            //有子元素



            for (Iterator it = elements.iterator(); it.hasNext();) {



                Element elem = (Element) it.next();



                //递归遍历



                getElementList(elem);



            }



        }



    }







    public String getListString(List elemList) {



        StringBuffer sb = new StringBuffer();



        for (Iterator it = elemList.iterator(); it.hasNext();) {



            Leaf leaf = it.next();



            sb.append(leaf.getXpath()).append(" = ").append(leaf.getValue()).append("/n");



        }



        return sb.toString();



    }



}







    /**



    * xml节点数据结构



    */



class Leaf {



    private String xpath;         //



    private String value;







    public Leaf(String xpath, String value) {



        this.xpath = xpath;



        this.value = value;



    }







    public String getXpath() {



        return xpath;



    }







    public void setXpath(String xpath) {



        this.xpath = xpath;



    }







    public String getValue() {



        return value;



    }







    public void setValue(String value) {



        this.value = value;



    }



}



    运行结果： -----------原xml内容------------











    



        某人



        



            



                10002



                西安市太白路



            



            



                10002



                空ID节点啊



            



            



                10002



                空ID节点啊



            



      



    



                西安市太白路2



            



  



    



    



        ASDF



    







-----------解析结果------------



/doc/person/name = 某人



/doc/person/adds/add/BS = 10002



/doc/person/adds/add/note = 西安市太白路



/doc/person/adds/add/BS = 10002



/doc/person/adds/add/note = 空ID节点啊



/doc/person/adds/add/BS = 10002



/doc/person/adds/add/note = 空ID节点啊



/doc/person/adds/add/*[name()='BS'] =



/doc/person/adds/add/note = 西安市太白路2



/doc/other/name = ASDF







Process finished with exit code 0