Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

xmlѡȡµ¥¸ö½ÚµãÄÚÈݽâ¾ö°ì·¨

XPath Óï·¨
2007-06-05 17:24
XPath Óï·¨
×÷Õß:w3pop.com ·­Òë/ÕûÀí:w3pop.com ·¢²¼:2007-04-29 ä¯ÀÀ:674 :: ::
XPath Nodes(½Úµã) XPath Axes
XPath uses path expressions to select nodes or node-sets in an XML document. The node is selected by following a path or steps.
XPath ͨ¹ý·¾¶±í´ïʽ´ÓXMLÎĵµÖÐѡȡ½Úµã»ò½ÚµãÉèÖ᣿ÉÒÔͨ¹ýÒ»ÌõÓï¾ä»òÏàÓ¦µÄ²½Öèѡȡһ¸ö½Úµã¡£
The XML Example Document
XMLÎĵµÊµÀý
We will use the following XML document in the examples below.
ÎÒÃǽ«ÔÚ½ÓÏÂÀ´µÄÎÄÕÂÖÐÒýÓÃÕâ¸öXMLÎĵµ¡£
<?xml version="1.0" encoding="ISO-8859-1"?>
<bookstore>
<book>
   <title lang="eng">Harry Potter</title>
   <price>29.99</price>
</book>
<book>
   <title lang="eng">Learning XML</title>
   <price>39.95</price>
</book>
</bookstore>
Selecting Nodes
ѡȡ½Úµã
XPath uses path expressions to select nodes in an XML document. The node is selected by following a path or steps. The most useful path expressions are listed below:
XPathͨ¹ý·¾¶±í´ïʽÔÚXMLÎĵµÖÐѡȡ½Úµã¡£¿ÉÒÔͨ¹ýÒ»ÌõÓï¾ä»òÏàÓ¦µÄ²½Öèѡȡһ¸ö½Úµã¡£ÏÂÃæÁгöÁË×ʹÓõÄ·¾¶±í´ïʽ£º
Expression
±í´ïʽ
Description
×¢ÊÍ
nodename
Selects all child nodes of the node
ѡȡ½ÚµãϵÄËùÓÐ×Ó½Úµã
/
Selects from the root node
ѡȡ¸ù½Úµã
//
Selects nodes in the document from the current node that match the selection no matter where they are
ѡȡÎĵµÖÐËùÓзûºÏÌõ¼þµÄ½Úµã£¬²»¹Ü¸Ã½ÚµãλÓںδ¦
.
Selects the current node
ѡȡµ±Ç°½Úµã
..
Selects the parent of the current node
ѡȡµ¥Ç°½ÚµãµÄ¸¸½Úµã
@
Selects attributes
ѡȡÊôÐÔ
Examples
ʵÀý
In the table below we have listed some path expressions and the result of the expressions:
ÔÚÏÂÃæµÄ±í¸ñÖУ¬ÎÒÃÇÁгöÁËһЩ·¾¶±í´ïʽ¼°ÆäÔËÐеĽá¹û£º
Path Expression
±í´ïʽ
Result
½á¹û
bookstore
Selects all the child nodes of the bookstore element
ѡȡbookstoreÔªËØµÄËùÓÐ×Ó½Úµã
/bookstore
Selects the root element bookstore
Ñ


Ïà¹ØÎĵµ£º

springÖжÁÈ¡xmlÅäÖÃÎļþ¡¢»ñÈ¡beanµÄ¼¸ÖÖ·½Ê½

»ñÈ¡Spring¿ò¼Ü¹ÜÀíµÄÀàʵÀýµÄ·½·¨ÓжàÖÖ,ÈçÏ£º
·½·¨Ò»£ºÔÚ³õʼ»¯Ê±±£´æApplicationContext¶ÔÏó
´úÂ룺
ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml");
ac.getBean("beanId");
˵Ã÷£º
ÕâÖÖ·½Ê½ÊÊÓÃÓÚ²ÉÓÃSpring¿ò¼ÜµÄ¶ÀÁ¢Ó¦ÓóÌÐò£¬ÐèÒª³ÌÐòͨ¹ýÅäÖÃÎļþÊÖ¹¤³õʼ»¯ ......

½«Êý×éת»¯ÎªXMLÊý¾Ý

/* Author: ÑîÓî  yangyu@sina.cn */
/*
Ó÷¨Ê¾Àý£º
$cls_xml = new cls_xml();
if ($array){
 $cls_xml->array2xml($array);
 echo $cls_xml->getXml(); 
}else{
 echo '';
}
*/
class cls_xml{
        var $xml;
  &nbs ......

JavaÓëXMLÁªºÏ±à³ÌÖ®SAXƪ


SAX¸ÅÄî

SAXÊÇSimple API for XML
µÄËõд£¬Ëü²¢²»ÊÇÓÉW3C¹Ù·½ËùÌá³öµÄ±ê×¼£¬¿ÉÒÔ˵ÊÇ“Ãñ¼ä”µÄÊÂʵ±ê×¼¡£Êµ¼ÊÉÏ£¬ËüÊÇÒ»ÖÖÉçÇøÐÔÖʵÄÌÖÂÛ²úÎï¡£ËäÈ»Èç´Ë£¬ÔÚXMLÖжÔSAXµÄÓ¦ÓÃË¿ºÁ²»±ÈDOMÉÙ£¬¼¸ºõËùÓеÄXML½âÎöÆ÷¶¼»áÖ§³ÖËü¡£

Óë
DOM±È½Ï¶øÑÔ£¬SAXÊÇÒ»ÖÖÇáÁ¿Ð͵ķ½·¨¡£ÎÒÃÇÖªµÀ£¬ÔÚ´¦ÀíDOMµÄʱºò£¬Î ......

MsXml´´½¨ºÍ½âÎöXMLʾÀý

Ò»£®MsXml´´½¨XMLÎĵµÊ¾Àý
 // XmlCreationDemo.cpp
#include <stdlib.h>
#include <stdio.h>
// ÒýÈëMSXML½âÎöÆ÷
#import <msxml4.dll>
using namespace MSXML2;
class InitializeCom
{
public:
InitializeCom() { CoInitialize(NULL); // Initializes the COM library }
~Initializ ......

[¼¼Êõѧϰ]C++ XML¿â£¨×ªÔØ£©

ÔÚC++ÖУ¬¿âµÄµØÎ»ÊǷdz£¸ßµÄ¡£C++Ö®¸¸ Bjarne StroustrupÏÈÉú¶à´Î±íʾÁËÉè¼Æ¿âÀ´À©³ä¹¦ÄÜÒªºÃ¹ýÉè¼Æ¸ü¶àµÄÓï·¨µÄÑÔÂÛ¡£ÏÖʵÖУ¬C++µÄ¿âÃÅÀà·±¶à£¬½â¾öµÄÎÊÌâÒ²ÊǼ«Æä¹ã·º£¬¿â´ÓÇáÁ¿¼¶µ½ÖØÁ¿¼¶µÄ¶¼ÓС£²»ÉÙ¶¼ÊÇÈÃÈËÑÛ½ç´ó¿ª£¬Òà»òÊÇÍû¶øÉú̾µÄ˼ά½Ü×÷¡£ÓÉÓÚ¿âµÄÊýÁ¿·Ç³£ÅӴ󣬶øÇÒÏÞÓÚ±ÊÕßˮƽ£¬ÆäÖкܶಢ²»Á˽⡣ËùÒÔÎÄÖ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ