详解Java解析XML的四种方法

package com.alisoft.facepay.framework.bean; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.PrintWriter; 
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.parsers.ParserConfigurationException; 
import javax.xml.transform.OutputKeys; 
import javax.xml.transform.Transformer; 
import javax.xml.transform.TransformerConfigurationException; 
import javax.xml.transform.TransformerException; 
import javax.xml.transform.TransformerFactory; 
import javax.xml.transform.dom.DOMSource; 
import javax.xml.transform.stream.StreamResult; 
import org.w3c.dom.Document; 
import org.w3c.dom.Element; 
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
import org.xml.sax.SAXException; 
/** 
* 
* @author hongliang.dinghl 
* DOM生成与解析XML文档 
*/ 
public class DomDemo implements XmlDocument { 

private Document document; 

private String fileName; 

public void init() { 
try { 
DocumentBuilderFactory factory = DocumentBuilderFactory 
.newInstance(); 
DocumentBuilder builder = factory.newDocumentBuilder(); 
this.document = builder.newDocument(); 
} catch (ParserConfigurationException e) { 
System.out.println(e.getMessage()); 
} 
} 

public void createXml(String fileName) { 

Element root = this.document.createElement("employees"); 
this.document.appendChild(root); 
Element employee = this.document.createElement("employee"); 
Element name = this.document.createElement("name"); 
name.appendChild(this.document.createTextNode("丁宏亮")); 
employee.appendChild(name); 
Element sex = this.document.createElement("sex"); 
sex.appendChild(this.document.createTextNode("m")); 
employee.appendChild(sex); 
Element age = this.document.createElement("age"); 
age.appendChild(this.document.createTextNode("30")); 
employee.appendChild(age); 
root.appendChild(employee); 

TransformerFactory tf = TransformerFactory.newInstance(); 
try { 
Transformer transformer = tf.newTransformer(); 
DOMSource source = new DOMSource(document); 
transformer.setOutputProperty(OutputKeys.ENCODING, "gb2312"); 
transformer.setOutputProperty(OutputKeys.INDENT, "yes"); 
PrintWriter pw = new PrintWriter(new FileOutputStream(fileName)); 
StreamResult result = new StreamResult(pw); 
transformer.transform(source, result); 
System.out.println("生成XML文件成功!"); 
} catch (TransformerConfigurationException e) { 

System.out.println(e.getMessage()); 
} catch (IllegalArgumentException e) { 

System.out.println(e.getMessage()); 
} catch (FileNotFoundException e) { 

System.out.println(e.getMessage()); 
} catch (TransformerException e) { 

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

} 

public void parserXml(String fileName) { 
try { 
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
DocumentBuilder db = dbf.newDocumentBuilder(); 
Document document = db.parse(fileName); 
NodeList employees = document.getChildNodes(); 
for (int i = 0; i < employees.getLength(); i++) { 
Node employee = employees.item(i); 
NodeList employeeInfo = employee.getChildNodes(); 
for (int j = 0; j < employeeInfo.getLength(); j++) { 
Node node = employeeInfo.item(j); 
NodeList employeeMeta = node.getChildNodes(); 
for (int k = 0; k < employeeMeta.getLength(); k++) { 
System.out.println(employeeMeta.item(k).getNodeName() 
+ ":" + employeeMeta.item(k).getTextContent()); 
} 
} 
} 
System.out.println("解析完毕"); 
} catch (FileNotFoundException e) { 
System.out.println(e.getMessage()); 
} catch (ParserConfigurationException e) { 
System.out.println(e.getMessage()); 
} catch (SAXException e) { 
System.out.println(e.getMessage()); 
} catch (IOException e) { 
System.out.println(e.getMessage()); 
} 

} 


} 


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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");   
    }   
}   
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复制
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;i                Element employee=(Element)employeeList.get(i);   
                List employeeInfo=employee.getChildren();   
                for(int j=0;j                    System.out.println(((Element)employeeInfo.get(j)).getName()+":"+((Element)employeeInfo.get(j)).getValue());   
                       
                }   
            }   
        } catch (JDOMException e) {   
           
            e.printStackTrace();   
        } catch (IOException e) {   
           
            e.printStackTrace();   
        }    
  
    }   
}   
    
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