API帮助文档:
处理DEMO整理:
DEMO一:使用API生成XML文档
package xml.utils;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Document;
public class Foo {
public Document createDocument() {
Document document = DocumentHelper.createDocument();
Element root = document.addElement("root");
Element author1 = root.addElement("author")
.addAttribute("name","job")
.addAttribute("location", "US")
.addText("HKEBAO");
return document;
}
public static void main(String[] args) {
Document document = new Foo().createDocument();
System.out.println(document.asXML());
}
}
输出的结果:
HKEBAO直接通过内置的API输出一段XML出来!
DEMO2 :通过使用API进行读取XML里面的数据。
原理:将XML解析到内存然后生成一棵DOCUMENT树!
解析的方法有多种
/**
* @param File
* @return Document
* @throws DocumentException
* */
public Document parse(File aFile) throws DocumentException {
SAXReader xmlReader = new SAXReader();
return xmlReader.read(aFile);
}
注意:JAVA里面的File路径问题需要做一个专题讲一下!!!
public static void main(String[] args) throws MalformedURLException, DocumentException {
File file = new File("dom4j.xml");
Document document = new Foo().parse(file);
new Foo().bar(document);
System.out.println(document.asXML());
}
我们可以通过这样的方法来读出来一个XML文档。读出来了之后就可以方便进行解析了!
DEMO3
public void modifyDocumet(File inputxml) {
try {
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(inputxml);
List list = document.selectNodes("//article/@level");//使用了XPath语法
Iterator iter = list.iterator();
while (iter.hasNext()) {
Attribute attribute = (Attribute) iter.next();
if (attribute.getValue().equals("Intermediate")) {
attribute.setValue("Introductory");
}
}
list = document.selectNodes("//article/@date" );
iter = list.iterator();
while (iter.hasNext()) {
Attribute attribute = (Attribute) iter.next();
if(attribute.getValue().equals("December-2001"))
attribute.setValue("2002");
}
list = document.selectNodes("//article" );
iter=list.iterator();
while(iter.hasNext()){
Element element=(Element)iter.next();
Iterator iterator=element.elementIterator("title");
while(iterator.hasNext()){
Element titleElement=(Element)iterator.next();
if(titleElement.getText().equals("Java configuration with XMLSchema"))
titleElement.setText("Create flexible and extensible XML schema");
}
}
} catch (Exception e) {
// TODO: handle exception
}
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