Java基础：Dom4j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 = "< ?xml version=\"1.0\" encoding=\"GBK\"?>\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;
}
}

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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 = "< ?xml version=\"1.0\" encoding=\"GBK\"?>\n" +

"\n" +

" \n" +

" 某人\n" +

" \n" +

" 10002\n" +

" 西安市太白路\n" +

" \n" +

" 10002\n" +

" 空ID节点啊\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" +

" 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————

< ?xml version=”1.0″ encoding=”GBK”?>

某人

10002
西安市太白路

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 可以发现，有很多xpath相同的值域。
Java基础：Dom4j递归遍历XML所有元素
发布时间：2009.06.16 05:05 来源：51cto blog 作者： dorothyfeng

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 = "< ?xml version=\"1.0\" encoding=\"GBK\"?>\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;
}
}

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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 = "< ?xml version=\"1.0\" encoding=\"GBK\"?>\n" +

"\n" +

" \n" +

" 某人\n" +

" \n" +

" 10002\n" +

" 西安市太白路\n" +

" \n" +

" 10002\n" +

" 空ID节点啊\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" +

" 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————

< ?xml version=”1.0″ encoding=”GBK”?>

某人

10002
西安市太白路

10002
空ID节点啊

西安市太白路2

ASDF

Process finished with exit code 0 可以发现，有很多xpath相同的值域。