简单使用dom4j

package com.dom4j;

import java.io.FileWriter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamSource;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.DocumentResult;
import org.dom4j.io.DocumentSource;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class Test1 {
public static void main(String[] args){
//C:/Users/Administrator.PMIMP83HWNIKWOV/Workspaces/MyEclipse 9/TestWeb/WebRoot/
/**
* 我使用绝对路径就会报错unknown protocol: c,不知道什么原因，现在使用的是相对路径，如果不好使用相对路径，直接使用File文件吧
*/
//String uri="WebRoot/xml/languages.xml";
//Document doc=praseXmlToDocument(uri);
//System.out.println(doc.getRootElement().getName());
//Iteratorasdom(doc);
//navigation(doc);
//treeWalk(doc);
//Document doc=createDocument();
//DocmentToFile(doc,"");
StringToDoc();

}

public static Document praseXmlToDocument(String url){
/**
* 解析xml文件成document对象
*/
Document document=null;
try {
SAXReader reader=new SAXReader();

document = reader.read(url);
} catch (DocumentException e) {
e.printStackTrace();
}
return document;
}

public static void Iteratorasdom(Document document){
/**
* document获取根元素： .getRootElement()
* Node类型获取所有字节点的迭代器 .elementIterator()
* 获取指定名称的所有子节点的迭代器  .elementIterator(String name)
* 获取所有属性的迭代器 .attributeIterator()
*/
Element root=document.getRootElement();
/*for(Iterator i=root.elementIterator();i.hasNext();){
Element element=(Element) i.next();
System.out.println(element.getName());
for(Iterator it=element.attributeIterator();it.hasNext();){
Attribute att=(Attribute) it.next();
System.out.println(att.getName()+"="+att.getStringValue());
}
}*/
for(Iterator i=root.elementIterator("lan");i.hasNext();){
Element element=(Element) i.next();
for(Iterator it=element.attributeIterator();it.hasNext();){
Attribute att=(Attribute) it.next();
System.out.println(att.getName()+"="+att.getStringValue());
}
}
}

public static void navigation(Document document){
/* 使用selectNodes需要使用jaxen.jar
* .selectNodes("//languages/lan/name");获取所有指定名称节点的集合
* .selectSingleNode("//languages/lan/name"); 获取第一个指定名称的节点
* node和document对象都有这个方法
* */
/*List list=document.selectNodes("//languages/lan/name");
for(int i=0;i<list.size();i++){
Node node=(Node) list.get(i);
System.out.println(node.getText());
}*/
Node node=document.selectSingleNode("//languages/lan/name");
System.out.println(node.getText());
}

/*遍历document或者element元素的方法*/

public static void treeWalk(Document document) {
treeWalk( document.getRootElement() );
}

public static void treeWalk(Element element) {
for ( int i = 0, size = element.nodeCount(); i < size; i++ ) {
Node node = element.node(i);
if ( node instanceof Element ) {
treeWalk( (Element) node );
}
else
{
System.out.println(node.getText());
}
}
}

public static Document createDocument(){
/**
* 添加子元素.addElement(String name)
* 添加属性 .addAttribute(key,value)
* 添加值 .addText(String value)
*/
Document document=DocumentHelper.createDocument();
Element root=document.addElement("root");

Element author1=root.addElement("author")
.addAttribute("name", "James")
.addAttribute("location", "UK")
.addText("James Strachan");

Element author2=root.addElement("author")
.addAttribute("name", "Bob")
.addAttribute("location", "US")
.addText("Bob Mchirter");

return document;
}

public static void DocmentToFile(Document doc,String uri){
/* 第一种方法，使用XMLWriter对象的writer方法*/
XMLWriter writer = null;
/*try {
writer=new XMLWriter(new FileWriter(uri));
writer.write(doc);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/

/*
* 输出到控制台
* */
OutputFormat format=OutputFormat.createPrettyPrint();
try {
writer=new XMLWriter(System.out,format);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
writer.write(doc);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

public static void StringToDoc(){
/* 将docment对象转换称为xml */
/*Document doc=createDocument();
String text=doc.asXML();
System.out.println(text);*/
/* 将text对象转换称为document*/
String text="<a><b>1</b><b>2</b><b>3</b></a>";
try {
Document document=DocumentHelper.parseText(text);
treeWalk(document);
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public static Document a(Document doc,String stylesheet) throws IOException{
TransformerFactory factory=TransformerFactory.newInstance();
Transformer transformer = null;
try {
transformer=factory.newTransformer(new StreamSource(stylesheet));
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

DocumentSource source=new DocumentSource(doc);
DocumentResult result=new DocumentResult();
try {
transformer.transform( source, result );
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Document transformedDoc = result.getDocument();
XMLWriter writer = null;

writer=new XMLWriter(new FileWriter("doc.doc"));
writer.write(transformedDoc);

return transformedDoc;
}

}