Java解析XML的四种方法(3、4)

 

3.DOM4J生成和解析XML文档

DOM4J 是一个非常非常优秀的Java XML API，具有性能优异、功能强大和极端易用使用的特点，同时它也是一个开放源代码的软件。如今你可以看到越来越多的 Java 软件都在使用 DOM4J 来读写 XML，特别值得一提的是连 Sun 的 JAXM 也在用 DOM4J。

 

package com.alisoft.facepay.framework.bean;   
import java.io.File;  
import java.io.FileWriter;  
import java.io.IOException;  
import java.io.Writer;  
import java.util.Iterator;  

import org.dom4j.Document;  
import org.dom4j.DocumentException;  
import org.dom4j.DocumentHelper;  
import org.dom4j.Element;  
import org.dom4j.io.SAXReader;  
import org.dom4j.io.XMLWriter;  
/** 
*  
* @author hongliang.dinghl 
* Dom4j 生成XML文档与解析XML文档 
*/ 
public class Dom4jDemo implements XmlDocument {  

public void createXml(String fileName) {  
Document document = DocumentHelper.createDocument();  
Element employees=document.addElement("employees");  
Element employee=employees.addElement("employee");  
Element name= employee.addElement("name");  
name.setText("ddvip");  
Element sex=employee.addElement("sex");  
sex.setText("m");  
Element age=employee.addElement("age");  
age.setText("29");  
try {  
Writer fileWriter=new FileWriter(fileName);  
XMLWriter xmlWriter=new XMLWriter(fileWriter);  
xmlWriter.write(document);  
xmlWriter.close();  
} catch (IOException e) {  

System.out.println(e.getMessage());  
}  


}  


public void parserXml(String fileName) {  
File inputXml=new File(fileName);  
SAXReader saxReader = new SAXReader();  
try {  
Document document = saxReader.read(inputXml);  
Element employees=document.getRootElement();  
for(Iterator i = employees.elementIterator(); i.hasNext();){  
Element employee = (Element) i.next();  
for(Iterator j = employee.elementIterator(); j.hasNext();){  
Element node=(Element) j.next();  
System.out.println(node.getName()+":"+node.getText());  
}  

}  
} catch (DocumentException e) {  
System.out.println(e.getMessage());  
}  
System.out.println("dom4j parserXml");  
}   
}  

 

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。

package com.alisoft.facepay.framework.bean;   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();   }    }   }