java解析xml常用的几种方式总结

<?xml version="1.0" encoding="iso-8859-1"?>
<bookstore>
<book category="cooking">
  <title lang="en">everyday italian</title>
  <author>giada de laurentiis</author>
  <year>2005</year>
  <price>30.00</price>
  <aa>
   <bb>
    <cc>ccccc</cc>
   </bb>
  </aa>
</book>

<book category="children">
  <title lang="en">harry potter</title>
  <author>j k. rowling</author>
  <year>2005</year>
  <price>29.99</price>
</book>

<book category="web">
  <title lang="en">xquery kick start</title>
  <author>james mcgovern</author>
  <author>per bothner</author>
  <author>kurt cagle</author>
  <author>james linn</author>
  <author>vaidyanathan nagarajan</author>
  <year>2003</year>
  <price>49.99</price>
</book>

<book category="web">
  <title lang="en">learning xml</title>
  <author>erik t. ray</author>
  <year>2003</year>
  <price>39.95</price>
</book>

</bookstore>

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());

 }
}

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");
     }

  }) ;

  
 }

}

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...
   }

  }

 }

}

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());;

 }

}