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：

代码如下:

<?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>

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());

}
}

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");
     }

}) ;

}

}

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...
   }

}

}

}

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());;

}

}