java解析xml常用的幾種方式總結

2019-11-26 15:53:16

字體：大中小

來源：轉載

供稿：網友

各種方法都用過。現在總結一下。經常記不住，要找資料。現在總結一下。

xml 文件如下：

<?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>

復制代碼代碼如下:

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());

}
}

復制代碼代碼如下:

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");
     }

  }) ;


}

}

復制代碼代碼如下:

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...
   }

}

復制代碼代碼如下:

package sort;

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

/**
* 使用DOM4j XPATH解析XML (需要加入依賴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"));

  /* 選擇所有的cc節點 */
  System.out.println(root.selectNodes("http://cc").size());;

  /*選擇所有的book節點，并且有子節點author的*/
  System.out.println((root.selectNodes("http://book[author]").size()));;

  /* 選擇所有book節點，并且有屬性category的   */
  System.out.println((root.selectNodes("http://book[@category]").size()));;

  /* 選擇所有book節點，并且有子節點author值為James McGovern ，并且還有category屬性節點值為WEB   下面的price節點*/
  System.out.println(root.selectNodes("http://book[author='James McGovern'][@category='WEB']/price").size());;

}