Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÔÚ Java »·¾³ÖÐʹÓà XQuery

XML Êý¾Ý¸ñʽºÜÄÑËÑË÷£¬µ«ÊÇ×î½üËæ×Å XQuery API µÄ³öÏÖ£¬XML ËÑË÷±äµÃ·Ç³£Áé»îºÍ¼òµ¥¡£¶ÔÓÚʹÓà SAX¡¢DOM¡¢JDOM¡¢JAXP µÈ´¦Àí XML ÎĵµµÄ Java™ ³ÌÐòÔ±À´Ëµ£¬¹¤¾ßÏäÖÐÔö¼Ó XQuery API for Java ÊÇÒ»¼þÖµµÃ¸ßÐ˵ÄÊ¡£ÏÖÔÚ Java ³ÌÐòÔ±²»ÓÃÔÙÇóÖúÓÚϵͳµ÷ÓûòÕß±¿×¾µÄ API ¾ÍÄÜÀûÓà XQuery µÄÇ¿´ó¹¦ÄÜÁË£¬Sun ÌṩÁËÒ»Ì×ÍêÕûµÄ¡¢±ê×¼»¯µÄ°ü¡£
SQL Êý¾Ý¿â¡¢XML Êý¾ÝºÍ²éѯ
ËäÈ»±à³ÌÁìÓò — ÌرðÊÇ Java ±à³Ì — ²»¶Ï·¢Õ¹£¬¿É¹©Ñ¡ÔñµÄ±ê×¼µÄÊýÁ¿Ò²ÔÚÔö³¤¡£»»¾ä»°Ëµ£¬Ô½À´Ô½¶àµÄ API µÃµ½ Sun µÄÈÏ¿É»òÕßÅú×¼¡£±ê×¼»¯µÄ½á¹ûÊÇÔ½À´Ô½¶àµÄ¿ª·¢Õß±³ÆúÁË×Ô¼º×î¾ß¾ºÕùÁ¦µÄ¼¼Êõ£¬¶øȥѧϰм¼Êõ¡£
ÒªÕÆÎÕµÄ×îÓÐÎüÒýÁ¦ºÍ¼ÛÖµµÄÊÇÄÇЩºÍÊý¾Ý´¦ÀíÓйصŤ¾ßºÍ API¡£ÎÞÂÛÓ¦ÓóÌÐò¶àô¿á»òÕßÖÇÄÜ£¬Ëµµ½µ×Ö»ÓÐÄܹ»´¦ÀíÊý¾Ý²ÅÓÐÓá£Í¬Ê±£¬ËäÈ» API ÊýÁ¿µÄ²»¶ÏÔö³¤£¬µ«Á÷ÐкÍͨÓõÄÊý¾Ý¸ñʽÊýÁ¿È´²»¶Ï¼õÉÙ¡£ËäÈ»ÓÐЩÊý¾Ý¹ÜÀíÔ±ÈÔȻʹÓÃÃæÏò¶ÔÏóµÄÊý¾Ý¿â¹ÜÀíϵͳ»òÕß XML Çý¶¯µÄÊý¾Ý¿â£¬µ«¹ØϵÊý¾Ý¿â£¨RDBMS£©ÒѳÉΪÖ÷Á÷£¬¶øÇÒÈÔÈ»ÊǴ󲿷ÖÊý¾Ý¹ÜÀíÔ±µÄÑ¡Ôñ¡£Òò´Ë Java ¿ª·¢ÈËÔ±±ØÐëͨ¹ý JDBC£¨Êý¾Ý¿âÁ¬½Ó£©»òÕß JDO (Java Data Objects) Óë SQL Êý¾Ý¿â½»»¥¡£
SQL Êý¾Ý¿âÓëÆäËûÊý¾Ý¿â
ËäÈ»±¾ÎÄÌáµ½Á˲éѯºÍÊý¾Ý¿â£¬µ«ËùÖ¸µÄÊÇ SQL Êý¾Ý¿â — Ò²³ÆΪ¹ØϵÊý¾Ý¿â¡£²»¹ý XML Êý¾Ý¿âÉõÖÁ¶ÔÏóÊý¾Ý¿â¶¼ÓÐһЩºÜºÃµÄÓ¦ÓóÌÐò¡£
Èç¹û¶Ô XML Êý¾Ý¿â¸ÐÐËȤ£¬¿ÉÒԲ鿴 DB2® Express-C£¬¿ÉÃâ·ÑÏÂÔØ£¨Á´½Ó²Î¼û ²Î¿¼×ÊÁÏ£©¡£×îÃ÷ÏÔµÄÒ»µãÊÇ£¬XML Êý¾Ý¿âÔÚ XML ÎĵµºÍ¹ØϵÊý¾ÝÖ®¼ä½øÐв»±ØÒªµÄת»»¡£±¾ÎÄ»¹ÈÏΪ£¬XQuery ʵ¼ÊÉÏÒѱäΪÊý¾Ý¿â²éѯÓïÑÔ£¬ÒòΪ XML Êý¾Ý¿âÒÔ XML ¸ñʽ´æ´¢Êý¾Ý¡£
Êý¾Ý¿âÖ®ÍâµÄÊý¾Ý»ù±¾ÉÏÒ²¶¼ÒÔ XML ×÷Ϊ±ê×¼Êý¾Ý¸ñʽ¡£XML ËäÈ»Èß³¤µ«Êǽ¡×³£¬Java ÓïÑÔÖд¦Àí XML µÄ API ¿ÉÄܱÈÆäËûÓïÑÔ¶¼¶à¡£ÎÞÂÛÊǽâÎö¡¢Êý¾Ý°ó¶¨»¹ÊÇת»»£¬Èç¹ûÓ¦ÓóÌÐò²»ÄÜ´¦Àí XML£¬¾Í»á±»ÈÏΪÓоÖÏÞÐÔÉõÖÁÓеãÂäºó¡£
Á½Õß¿´ËÆÎ޹أ¬— Êý¾ÝÍùÍù±£´æÔÚ SQL Êý¾Ý¿âÖУ¬Êý¾Ý¿âÖ®ÍâµÄÊý¾ÝÔ½À´Ô½¶àµØ²ÉÓà XML ¸ñʽ —£¬µ«ÊÇÈ´Ôì³ÉÁËһЩ¶ÀÌصÄÎÊÌâ¡£SQL Êý¾Ý¿âÈÝÒײéѯ£¬¶ø XML ÎĵµÔò²»ÊÇÕâÑù¡£Ïû·ÑÕßÏ£ÍûÄܹ»·½±ãµØËÑË÷Êý¾Ý£¬Êý¾Ý¿âÖеÄÊý¾Ý²éѯ·½±ã£¬µ«ÊÇ XML ÎĵµÖеÄÊý¾Ý¾Í²»ÄÇôÈÝÒ×ÁË¡£ÏÔÈ»£¬½« XML ¸ñʽµÄÊý¾ÝÈûµ½Êý¾Ý¿âÖÐÒÔ·½±ãËÑË÷µÄ×ö·¨ÊÇÐв»Í¨µÄ¡£ÓÚÊǾͳöÏÖÁË XQuery — ÏàÓ¦µÄÒ²¾ÍÓÐÁË XQuery API for Java (XQJ)¡£
 
ȯ


Ïà¹ØÎĵµ£º

javaÎļþÉÏ´«·½·¨

ÎļþÉÏ´«·½·¨£¨Ò»´ÎÉÏ´«Ò»¸öÎļþ£¬¶à¸öÎļþµÄ»°£¬Çëдѭ»·µ÷Óã©
Upload.uploadFile(theFile, filePath)
˵Ã÷£º
theFile£ºÀàÐÍÊÇFormFile
filePath£ºactionÖз¾¶»ñÈ¡·½·¨    this.getServlet().getServletContext().getRealPath("/")
µ÷Óô˷½·¨·µ»ØÎļþÉÏ´«ºóµÄ·¾¶Ãû
ÉÏ´«¶à¸öÎļþʱ£¬ÇëÉèÖÃÿ¸öÎ ......

java »ñµÃ ip µØÖ·

Ò»°ãÇé¿ö»ñµÃ±¾µØËùÓеÄipµØÖ·£º
try   {
InetAddress   address   =   InetAddress.getLocalHost();
System.out.println(address.getHostAddress());
String   name   =   address.getHostName();
System.out.println(name);
InetAddress[]   addresses   = &nbs ......

ÓÃJAVAÔõô´ò¿ªÒ»¸ö·Ç¿ÉÖ´ÐеÄÎļþ£¿

µÚÒ»ÖÖ·½·¨Ê¹Óà DesktopÀ࣬¸ÃÀà¼Ì³Ð×ÔObject
import java.awt.*;
import java.io.*;
class DesktopTest
{
public static void main(String args[])
{
if (!Desktop.isDesktopSupported())
{
System.err.println("Desktop not supported!");
System.exit(-1);
}
else
{
try{
Desktop desktop ......

Java±à³Ì˼ÏëµÚÈý°æժ¼

Chap1 ¶ÔÏó¼ò½é
       1.³éÏóµÄ¹ý³Ì
       Alan Kay×ܽáÁËSmalltalkµÄÎåÏî»ù±¾ÌØÕ÷¡£ÕâЩÌØÕ÷´ú±íÁË´¿µÄÃæÏò¶ÔÏóµÄ±à³Ì·½·¨£º
       (1).ÍòÎï½Ô¶ÔÏó¡£½«¶ÔÏóÏë³ÉÒ»ÖÖÌØÊâµÄ±äÁ¿£»Ëü´æ´¢Êý¾Ý£¬¶øÇÒ»¹¿ÉÒÔÈÃÄã“ÌáÒªÇ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ