Dom4j递归遍历XML所有元素-朝军的博客

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<String, String> xmlmap = new HashMap<String, String>();
 //存储xml元素信息的容器
 private static List<Leaf> elemList = new ArrayList<Leaf>();

 //要测试的xml对象
 private static String srcXml = "<?xml version="1.0" encoding="GBK"?> " +
 "<doc> " +
 " <person> " +
 " <name>某人</name> " +
 " <adds> " +
 " <add ID="10002"> " +
 " <BS>10002</BS> " +
 " <note>西安市太白路</note> " +
 " </add> " +
 " <add ID=""> " +
 " <BS>10002</BS> " +
 " <note>空ID节点啊</note> " +
 " </add> " +
 " <add> " +
 " <BS>10002</BS> " +
 " <note>空ID节点啊</note> " +
 " </add> " +
 " <add ID="10001"> " +
 " <BS xmlns="10001"/> " +
 " <note>西安市太白路2</note> " +
 " </add> " +
 " </adds> " +
 " </person> " +
 " <other> " +
 " <name ID="HEHE">ASDF</name> " +
 " </other> " +
 "</doc>";

 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<Leaf> elemList) {
 StringBuffer sb = new StringBuffer();
 for (Iterator<Leaf> it = elemList.iterator(); it.hasNext();) {
 Leaf leaf = it.next();
 sb.append(leaf.getXpath()).append(" = ").append(leaf.getValue()).append(" ");
 }
 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------------
<?xml version="1.0" encoding="GBK"?>
<doc>
 <person>
 <name>某人</name>
 <adds>
 <add ID="10002">
 <BS>10002</BS>
 <note>西安市太白路</note>
 </add>
 <add ID="">
 <BS>10002</BS>
 <note>空ID节点啊</note>
 </add>
 <add>
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