JDOM、DOM4j读取XML文件（SAXReader）
<students>
<student age="25"><!--如果没有age属性，默认的为20-->
<name>崔卫兵</name>
<college>PC学院</college>
<telephone>62354666</telephone>
<notes>男,1982年生,硕士，现就读于北京邮电大学</notes>
</student>
<student age="26">
<name>cwb</name>
<college leader="学院领导">PC学院</college><!--如果没有leader属性，默认的为leader-->
<telephone>62358888</telephone>
<notes>男,1987年生,硕士，现就读于中国农业大学</notes>
</student>
</students>
JDOM读取：
SAXBuilder builder = new SAXBuilder();
org.jdom.Document doc = builder.build(new File("F:/xmltest.xml"));
Element foo = doc.getRootElement();
List allChildren = foo.getChildren();
for (int i = 0; i < allChildren.size(); i++) {
System.out.println( ((Element) allChildren.get(i)).getChild("name").getText());
System.out.println("((Element) allChildren.get(i)).getChild("space").getText());
}
DOM4J读取XML：
public void testRead() throws DocumentException, FileNotFoundException{
SAXReader reader=new SAXReader();
Document doc=reader.read("D:/myeclipseWorkspace/Struts/src/test.xml");
Element root =doc.getRootElement();
for(Iterator it=root.elementIterator();it.hasNext();){
Element element=(Element)it.next();
System.out.println(element.attribute("age").getName()+" == "+element.attribute("age").getValue());
System.out.println(element.attributeValue("age"));
System.out.println(element.getName());
for(Iterator itt=element.elementIterator();itt.hasNext();){
//System.out.println(element.attributeValue("age"));
Element el=(Element)itt.next();
System.out.println(el.getName()+"=="+el.getText());
//getText()获取的是两个标签间的数据如"<name>崔卫兵</name>"中的崔卫兵
//getName()获取的是标签名，即“<student age="25"><name>崔卫兵</name>”中的age和name
//attributeValue("age")可获取age的值即25
}
System.out.println("==================");
}
}
结果：
age == 25 25 student name==崔卫兵 college==PC学院 telephone==62354666 notes==男,1982年生,硕士，现就读于北京邮电大学 ================== age == 26 26 student name==cwb college==PC学院 telephone==62358888 notes==男,1987年生,硕士，现就读于中国农业大学 ================== age == 45 45 student name==xxxxx college==xxx学院 telephone==66666666 notes==注视中，注释中 ================== age == 12 12 student name==lxx college==yyyy学院 telephone==88888888 notes==注视中111，注释中222 ==================
DOM读取XML：
XML文件：
<?xml version="1.0" encoding="gb2312"?>
<books>
<book attr="T001" id="idd1">
<name>第一本书</name>
<price>$14.09</price>
</book>
<book attr="T002" id="idd2">
<name>第二本书</name>
<price>$19.89</price>
</book>
<book attr="T003" id="idd3">
<name>第三本书</name>
<price>$26.00</price>
</book>
</books>
读取：
public void parserXml2(String fileName) {
DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder dombuilder = domfac.newDocumentBuilder();
// 方法1
Document doc = dombuilder.parse(fileName);
/*
* 方法2 InputStream is = new FileInputStream("F:\\ABC.xml"); Document
* doc = dombuilder.parse(is);
*/
/*
* 方法三如果要解析字符串result=
* "<?xml version=\"1.0\" encoding=\"gb2312\"?><books><book attribute=\"T001\"><name>第一本书</name><price>$14.09& lt;/price></book><book attribute=\"T002\"><name>第二本书</name><price>$19.89& lt;/price></book><book attribute=\"T003\"><name>第三本书</name><price>$26.00& lt;/price></book></books>"
* ;就用此方法 StringReader rd = new StringReader(result); InputSource is
* = new InputSource(rd); Document doc=dombuilder.parse(is);
*/
Element root = doc.getDocumentElement();
NodeList books = root.getChildNodes();
if (books != null) {
for (int i = 0; i < books.getLength(); i++) {
Node book = books.item(i);
if (book.getNodeType() == Node.ELEMENT_NODE) {
String attr = book.getAttributes().getNamedItem("attr").getNodeValue();
String id = book.getAttributes().getNamedItem("id").getNodeValue();
System.out.print(attr+" "+ id);
for (Node node = book.getFirstChild(); node != null; node = node
.getNextSibling()) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
if (node.getNodeName().equals("name")) {
String name = node.getNodeValue();
String name1 = node.getFirstChild().getNodeValue();
System.out.print(" " + name);
System.out.print(" " + name1);
}
if (node.getNodeName().equals("price")) {
String price = node.getFirstChild().getNodeValue();
System.out.println(" " + price);
}
}
}
}
}
}
} catch (ParserConfigurationException e) {
} catch (FileNotFoundException e) {
} catch (SAXException e) {
} catch (IOException e) {
}
}
该实例参考：http://www.360doc.com/content/07/1213/14/13829_891246.shtml
二、创建XML
DOM4J创建XML：
/**
* 创建XML
* @throws Exception
*/
public void testWrite() throws Exception{
Document document = DocumentHelper.createDocument();
Element root = document.addElement("root"); //根节点
for(int i=0;i<10;i++){
Element element1 = root.addElement("user")
.addAttribute("name","Alex"+i)
.addAttribute("id", "id"+i)
.addText("我是信息");
}
XMLWriter writer = new XMLWriter(new FileOutputStream("D:/myeclipseWorkspace/Struts/src/output.xml"));
writer.write(document);
writer.close();
}
输出方法2：
XMLOutputter XMLOut = new XMLOutputter();
File filePath = new File("D:/temp");
if (!filePath.exists()) {
filePath.mkdirs();
}
System.out.println("filePath==========="+filePath);
XMLOut.output(doc, new FileOutputStream(filePath + "/areaPie.xml"));
结果：
<?xml version="1.0" encoding="UTF-8"?> <root> <user name="Alex0" id="id0">我是信息</user> <user name="Alex1" id="id1">我是信息</user> <user name="Alex2" id="id2">我是信息</user> <user name="Alex3" id="id3">我是信息</user> <user name="Alex4" id="id4">我是信息</user> <user name="Alex5" id="id5">我是信息</user> <user name="Alex6" id="id6">我是信息</user> <user name="Alex7" id="id7">我是信息</user> <user name="Alex8" id="id8">我是信息</user> <user name="Alex9" id="id9">我是信息</user> </root>
JDOM创建XML：
import java.io.FileOutputStream;
import java.io.IOException;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.output.XMLOutputter;
public class Java2XML {
public void BuildXMLDoc() throws IOException, JDOMException {
// 创建根节点 list;
Element root = new Element("list");
// 根节点添加到文档中；
Document Doc = new Document(root);
// 此处 for 循环可替换成 遍历 数据库表的结果集操作;
for (int i = 0; i < 5; i++) {
// 创建节点 user;
Element elements = new Element("user");
// 给 user 节点添加属性 id;
elements.setAttribute("id", "" + i);
// 给 user 节点添加子节点并赋值；
// new Element("name")中的 "name" 替换成表中相应字段，setText("xuehui")中 "xuehui 替换成表中记录值；
elements.addContent(new Element("name").setText("xuehui"));
elements.addContent(new Element("age").setText("28"));
elements.addContent(new Element("sex").setText("Male"));
// 给父节点list添加user子节点;
root.addContent(elements);
}
XMLOutputter XMLOut = new XMLOutputter();
// 输出 user.xml 文件；
XMLOut.output(Doc, new FileOutputStream("user.xml"));
}
public static void main(String[] args) {
try {
Java2XML j2x = new Java2XML();
System.out.println("生成 mxl 文件...");
j2x.BuildXMLDoc();
} catch (Exception e) {
e.printStackTrace();
}
}
}
生成的 user.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<list>
<user id="0">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="1">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="2">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="3">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="4">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
</list>
该例子来源：http://zc4530.iteye.com/blog/70062
具体XML操作参见：
http://blog.csdn.net/wlh269/archive/2008/08/31/2855461.aspx
DOM4J 学习笔记：
http://heavyz.sourceforge.net/homepage/homepage_zh/comp/notes/dom4j.html
DOM创建XML方式：
package com.techson.himsnanhwa.admin.web;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class DomDemo{
private Document doc;
DomDemo() {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
doc = builder.newDocument();
} catch (ParserConfigurationException e) {
System.out.println(e.getMessage());
}
}
/**
* 都是用 doc.createElement("");创建
* 层次结构使用appendChild(name); 实现
*/
public void createXml(String fileName) {
Element root = doc.createElement("employees");
doc.appendChild(root);
Element employee = doc.createElement("employee");
Element name = doc.createElement("name");
name.appendChild(doc.createTextNode("小明"));
name.setAttribute("id", "2006414"); //设置id
employee.appendChild(name);
Element sex = doc.createElement("sex");
sex.appendChild(doc.createTextNode("m"));
employee.appendChild(sex);
Element age = doc.createElement("age");
age.appendChild(doc.createTextNode("30"));
employee.appendChild(age);
root.appendChild(employee);
TransformerFactory tf = TransformerFactory.newInstance();
try {
Transformer transformer = tf.newTransformer();
DOMSource source = new DOMSource(doc);
transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));
StreamResult result = new StreamResult(pw);
transformer.transform(source, result);
System.out.println("生成XML文件成功!");
} catch (TransformerConfigurationException e) {
} catch (IllegalArgumentException e) {
} catch (FileNotFoundException e) {
} catch (TransformerException e) {
}
}
public static void main(String[] args){
String fileName = "D:\\dom2.xml";
DomDemo domDemo = new DomDemo();
domDemo.createXml(fileName);
}
}
结果：
<?xml version="1.0" encoding="utf-8"?> <employees> <employee> <name id="2006414">小明</name> <sex>m</sex> <age>30</age> </employee> </employees>
总结：
Document document=new SAXReader.reader(“xml文路径/文件名xxx.xml”);//得到Document对象
Element root = document.getRootElement()//获得根节点
Iterator it=root.elementIterator(); //从根节点遍历子节点
Iterator iterator=element.elementIterator(); //再从子节点在遍历其子节点
对节点访问其属性用：Attribute leaderAttr =Element. attribute(“xxx”);
对节点访问其某个属性leaderAttr的名称：leaderAttr.getName()；
对节点访问其某个属性leaderAttr的值：leaderAttr.getValue()
对节点访问其名称：Element.getName();
对节点访问其文本：Element. getText();
Element root = document.getRootElement()//获得根节点
Iterator it=root.elementIterator(); //从根节点遍历子节点
Iterator iterator=element.elementIterator(); //再从子节点在遍历其子节点
对节点访问其属性用：Attribute leaderAttr =Element. attribute(“xxx”);
对节点访问其某个属性leaderAttr的名称：leaderAttr.getName()；
对节点访问其某个属性leaderAttr的值：leaderAttr.getValue()
对节点访问其名称：Element.getName();
对节点访问其文本：Element. getText();
创建XML:
Document document = DocumentHelper.createDocument();
Element root = document.addElement("root"); //根节点
Document document = DocumentHelper.createDocument();
Element root = document.addElement("root"); //根节点
或
Element root = new Element("pie");
Document doc = new Document(root);
Document doc = new Document(root);
详解Java解析XML的四种方法：
http://developer.51cto.com/art/200903/117512.htm
java中四种操作（DOM、SAX、JDOM、DOM4J）xml方式详解与比较：
http://hi.baidu.com/drager_000/blog/item/9ba51937a85c533f0b55a961.html
各种属性：
http://yifeng.iteye.com/blog/207239