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4.JDOM生成和解析XML  

为减少DOM、SAX的编码量，出现了JDOM；优点：20-80原则，极大减少了代码量。使用场合：要实现的功能简单，如解析、创建等，但在底层，JDOM还是使用SAX（最常用）、DOM、Xanan文档。

import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.util.List;  

import org.jdom.Document;  
import org.jdom.Element;  
import org.jdom.JDOMException;  
import org.jdom.input.SAXBuilder;  
import org.jdom.output.XMLOutputter;  
/** 
*  
* @author hongliang.dinghl 
* JDOM 生成与解析XML文档 
*  
*/ 
public class JDomDemo implements XmlDocument {  

public void createXml(String fileName) {  
Document document;  
Element  root;  
root=new Element("employees");  
document=new Document(root);  
Element employee=new Element("employee");  
root.addContent(employee);  
Element name=new Element("name");  
name.setText("ddvip");  
employee.addContent(name);  
Element sex=new Element("sex");  
sex.setText("m");  
employee.addContent(sex);  
Element age=new Element("age");  
age.setText("23");  
employee.addContent(age);  
XMLOutputter XMLOut = new XMLOutputter();  
try {  
XMLOut.output(document, new FileOutputStream(fileName));  
} catch (FileNotFoundException e) {  
e.printStackTrace();  
} catch (IOException e) {  
e.printStackTrace();  
}  

}  

public void parserXml(String fileName) {  
SAXBuilder builder=new SAXBuilder(false);   
try {  
Document document=builder.build(fileName);  
Element employees=document.getRootElement();   
List employeeList=employees.getChildren("employee");  
for(int i=0;iElement employee=(Element)employeeList.get(i);  
List employeeInfo=employee.getChildren();  
for(int j=0;jSystem.out.println(((Element)employeeInfo.get(j)).getName()+":"+((Element)employeeInfo.get(j)).getValue());  

}  
}  
} catch (JDOMException e) {  

e.printStackTrace();  
} catch (IOException e) {  

e.printStackTrace();  
}   

}  
}