Dom4j 读写 xml文件

简单写一下使用Dom4j如何xml文件
1.使用Dom4j 读取 xml文件
对应的java代码：

import java.io.File;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class ParseXMLByDOM4j {

/**
* @param args
*/
public static void main(String[] args) {
SAXReader sax=new SAXReader();
Document doc=null;
try {
doc=sax.read(new File("demo.xml"));
Element root=doc.getRootElement();
Iterator itor =root.elementIterator();
while(itor.hasNext())
{
System.out.println("=====Book Info======");
Element book=(Element)itor.next();
Attribute attr=book.attribute("id");
System.out.println("Book Id:"+attr.getValue());
List lst=book.elements();
for (int i = 0; i < lst.size(); i++) {
Element elem=(Element)lst.get(i);
System.out.println("Book "+elem.getName()+
":"+elem.getText());
}
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}

}

对应的xml文件：
<?xml version="1.0" encoding="gb2312" ?>
<books>
<book id="b001">
<author>至尊宝</author>
<title>倘若时光倒流</title >
</book>
<book  id="b002">
<author>白晶晶</author>
<title>月光宝盒实用大全</title>
</book>
</books>


2.使用Dom4j 读取 xml文件
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.XMLWriter;

import com.itany.entity.Person;

public class GenerateXMLByDOM4j {
public static void main(String[] args) {
Person p1=new Person("t01","Tom","Male",22);
Person p2=new Person("t02","Jerry","Female",23);
Person p3=new Person("t03","张三","Male",22);
List<Person> lst=new ArrayList<Person>();
lst.add(p1);
lst.add(p2);
lst.add(p3);

generateXml(lst,"person3.xml");
}

public static void generateXml(List<Person> lst,String fileName)
{
Document doc=DocumentHelper.createDocument();
Element root=doc.addElement("Persons");
//doc.add(root);
for (Person person : lst) {
Element per=root.addElement("Person");
per.addAttribute("id",person.getId() );
//root.add(per);
Element name=per.addElement("Name");
name.setText(person.getName());
//per.add(name);
Element gender=per.addElement("Gender");
gender.setText(person.getGender());
//per.add(gender);
Element age=per.addElement("Age");
age.setText(""+person.getAge());
//per.add(age);
}

XMLWriter writer=null;
try {
writer=new XMLWriter(new FileWriter(fileName));
writer.write(doc);
System.out.println("OK");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
try {
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

至此可以完成一些比较简单的功能! !