java解析xml常用的几种方式总结

各种方法都用过。现在总结一下。 经常记不住，要找资料。现在总结一下。

xml 文件如下：

复制代码 代码如下:

 
  Giada De Laurentiis
  2005
  30.00
 
   
    ccccc
   
 

 
  J K. Rowling
  2005
  29.99

 
  James McGovern
  Per Bothner
  Kurt Cagle
  James Linn
  Vaidyanathan Nagarajan
  2003
  49.99

 
  Erik T. Ray
  2003
  39.95

复制代码 代码如下:

package sort;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
public class D2 {
 /**
  * 直接使用DOM解析
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception{

  DocumentBuilder sb =  DocumentBuilderFactory.newInstance().newDocumentBuilder();

  Document root = sb.parse(D2.class.getClassLoader().getResourceAsStream("NewFile.xml"));

  System.out.println(root.getChildNodes().item(0).getNodeName());

 }
}

复制代码 代码如下:

package sort;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl;

public class D {

 /**
  * 使用SAX解析
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {

  SAXParserFactory factory = SAXParserFactoryImpl.newInstance();
  SAXParser parser = factory.newSAXParser() ;
  parser.parse(D.class.getClassLoader().getResourceAsStream("NewFile.xml"),
    new DefaultHandler(){

     @Override
     public void characters(char[] ch, int start, int length)
       throws SAXException {
      System.out.println("characters");
     }

     @Override
     public void endDocument() throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("endDocument");
     }

     @Override
     public void endElement(String uri, String localName,
       String qName) throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("endElement");
     }

     @Override
     public void startDocument() throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("startDocument");
     }

     @Override
     public void startElement(String uri, String localName,
       String qName, Attributes attributes)
       throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("startElement");
     }

  }) ;

  
 }

}

复制代码 代码如下:

package sort;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;

public class D3 {

 /**
  * 使用XMLStream解析
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {

  XMLInputFactory xmlFactor = XMLInputFactory.newFactory();

  XMLStreamReader reader =
   xmlFactor.createXMLStreamReader(D3.class.getClassLoader().getResourceAsStream("NewFile.xml"));
  while(reader.hasNext()){
   int point = reader.next() ;
   switch(point){
   case XMLStreamReader.START_ELEMENT :
    System.out.println("start_element");
   case XMLStreamReader.END_ELEMENT :
    // do something...
   }

  }

 }

}

复制代码 代码如下:

package sort;

import org.dom4j.Document;
import org.dom4j.io.SAXReader;

/**
 * 使用DOM4j XPATH解析XML (需要加入依赖jar文件)
 * @author zhoufeng
 *
 */
public class D4 {

 public static void main(String[] args) throws Exception{

  SAXReader reader = new SAXReader() ;

  Document root = reader.read(D4.class.getClassLoader().getResourceAsStream("NewFile.xml"));

  /* 选择所有的cc节点 */
  System.out.println(root.selectNodes("//cc").size());;

  /*选择所有的book节点，并且有子节点author的*/
  System.out.println((root.selectNodes("//book[author]").size()));;

  /* 选择所有book节点，并且有属性category的   */
  System.out.println((root.selectNodes("//book[@category]").size()));;

  /* 选择所有book节点，并且有子节点author值为James McGovern ，并且还有category属性节点值为WEB   下面的price节点*/
  System.out.println(root.selectNodes("//book[author='James McGovern'][@category='WEB']/price").size());;

 }

}