java(Web)ÖÐÏà¶Ô·¾¶£¬¾ø¶Ô·¾¶ÎÊÌâ×ܽá
javaÖÐÏà¶Ô·¾¶£¬¾ø¶Ô·¾¶ÎÊÌâ×ܽá
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡————bohemia(³Ç)
ǰÑÔ£º
ǰһ¶Îʱ¼ä£¬ÓÉÓÚÔÚ´¦ÀíWebÓ¦ÓÃϵÄÎļþ´´½¨ÓëÒÆ¶¯µÈ£¬Òò´ËÉæ¼°µ½ºÜ¶à¹ØÓÚjava
ÖÐÏà¶Ô·¾¶£¬¾ø¶Ô·¾¶µÈÎÊÌ⡣ͬʱ£¬¶ÔÓÚWebÓ¦ÓÃÖеÄÏà¶Ô·¾¶£¬¾ø¶Ô·¾¶£¬ÒÔ¼°Java.io.File
ÀàѧϰÁËһϡ£Ò²ÕÒÁËһЩ×ÊÁÏ¡£Ï£Íû´ó¼ÒÓöµ½ÀàËÆµÄÎÊÌ⣬¿ÉÒÔ¸üÓÐЧµÄ½â¾ö¡£
=================================================================================
1.»ù±¾¸ÅÄîµÄÀí½â
¡¡¡¡¾ø¶Ô·¾¶£º¾ø¶Ô·¾¶¾ÍÊÇÄãµÄÖ÷Ò³ÉϵÄÎļþ»òĿ¼ÔÚÓ²ÅÌÉÏÕæÕýµÄ·¾¶£¬(URLºÍÎïÀí·¾¶)ÀýÈ磺
C:\xyz\test.txt ´ú±íÁËtest.txtÎļþµÄ¾ø¶Ô·¾¶¡£http://www.sun.com/index.htmÒ²´ú±íÁËÒ»¸ö
URL¾ø¶Ô·¾¶¡£
¡¡¡¡Ïà¶Ô·¾¶£ºÏà¶ÔÓëij¸ö»ù׼Ŀ¼µÄ·¾¶¡£°üº¬WebµÄÏà¶Ô·¾¶£¨HTMLÖеÄÏà¶ÔĿ¼£©£¬ÀýÈ磺ÔÚ
ServletÖУ¬"/"´ú±íWebÓ¦ÓõĸúĿ¼¡£ºÍÎïÀí·¾¶µÄÏà¶Ô±íʾ¡£ÀýÈ磺"./" ´ú±íµ±Ç°Ä¿Â¼,
"../"´ú±íÉϼ¶Ä¿Â¼¡£ÕâÖÖÀàËÆµÄ±íʾ£¬Ò²ÊÇÊôÓÚÏà¶Ô·¾¶¡£
ÁíÍâ¹ØÓÚURI£¬URL,URNµÈÄÚÈÝ£¬Çë²Î¿¼RFCÏà¹ØÎĵµ±ê×¼¡£
RFC 2396: Uniform Resource Identifiers (URI): Generic Syntax,
(http://www.ietf.org/rfc/rfc2396.txt)
2.¹ØÓÚJSP/ServletÖеÄÏà¶Ô·¾¶ºÍ¾ø¶Ô·¾¶¡£
2.1·þÎñÆ÷¶ËµÄµØÖ·
¡¡¡¡ ·þÎñÆ÷¶ËµÄÏà¶ÔµØÖ·Ö¸µÄÊÇÏà¶ÔÓÚÄãµÄwebÓ¦ÓõĵØÖ·£¬Õâ¸öµØÖ·ÊÇÔÚ·þÎñÆ÷¶Ë½âÎöµÄ
£¨²»Í¬ÓÚhtmlºÍjavascriptÖеÄÏà¶ÔµØÖ·£¬ËûÃÇÊÇÓɿͻ§¶Ëä¯ÀÀÆ÷½âÎöµÄ£©Ò²¾ÍÊÇ˵Õâʱºò
ÔÚjspºÍservletÖеÄÏà¶ÔµØÖ·Ó¦¸ÃÊÇÏà¶ÔÓÚÄãµÄwebÓ¦Ó㬼´Ïà¶ÔÓÚhttp://192.168.0.1/webapp/µÄ¡£
¡¡¡¡ÆäÓõ½µÄµØ·½ÓУº
forward£ºservletÖеÄrequest.getRequestDispatcher(address);Õâ¸öaddressÊÇ
ÔÚ·þÎñÆ÷¶Ë½âÎöµÄ£¬ËùÒÔ£¬ÄãÒªforwardµ½a.jspÓ¦¸ÃÕâôд£º
request.getRequestDispatcher(“/user/a.jsp”)Õâ¸ö/Ïà¶ÔÓÚµ±Ç°µÄwebÓ¦ÓÃwebapp£¬
Æä¾ø¶ÔµØÖ·¾ÍÊÇ£ºhttp://192.168.0.1/webapp/user/a.jsp¡£
sendRedirect£ºÔÚjspÖÐ<%response.sendRedirect("/rtccp/user/a.jsp");%>
2.22¡¢¿Í»§¶ËµÄµØÖ·
ËùÓеÄhtmlÒ³ÃæÖеÄÏà¶ÔµØÖ·¶¼ÊÇÏà¶ÔÓÚ·þÎñÆ÷¸ùĿ¼(http://192.168.0.1/)µÄ£¬
¶ø²»ÊÇ(¸úĿ¼ÏµĸÃWebÓ¦ÓõÄĿ¼)http://192.168.0.1/webapp/µÄ¡£
HtmlÖеÄform±íµ¥µÄactionÊôÐԵĵØÖ·Ó¦¸ÃÊÇÏà¶ÔÓÚ·þ
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
±¾Ê¾Àý´ÓÍøÉÏÏÂÔØÒ»±¾Ð¡Ëµ£¬²¢±£´æÎª UTF-8 ¸ñʽ¡£
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.MalformedURLException;
......
Èý¸öѧÉúµ½Ò»¸öË®ÁúÍ·ÏÂÅŶÓȡˮ£¬ÈýÈ˶¼È¡ÍêË®ºóÒ»ÆðÀ뿪¡£
ÕâÀïÉæ¼°µ½ÈçºÎÅжÏÈý¸öÈ˶¼È¡ÍêË®¡£Èç¹ûÓÃÆÕͨµÄ¾²Ì¬³ÉÔ±£¬ÊƱػáÒªÓÃÎÞÏÞÑ»·À´µÈ´ý¡£¸üºÃµÄ°ì·¨ÊÇÓà wait-notify »úÖÆ¡£Ç°Á½¸öѧÉúÈ¡ÍêË®ºó¶¼ wait£¬×îºóÒ»¸öѧÉúÈ¡ÍêË®ºó notify£¬ÕâÑù¾ÍÄÜÒ»ÆðÀ뿪ÁË¡£ÏÂÃæÊÇ´úÂëʾÀý£º
/**
* Èý¸öѧÉúÅŶÓȡˮ£¬È¡ÍêºóÒ ......
µÚÒ»ÖÖ:
Map map = new HashMap();
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
Object key = entry.getKey();
Object val = entry.getValue();
}
ЧÂʸß,ÒÔºóÒ»¶¨ÒªÊ¹ÓôËÖÖ·½Ê½£¡
µÚ¶þÖÖ:
Map map = new HashMap();
Iterato ......
Ò»¡¢Java»ù´¡ÖªÊ¶
1.JavaÓÐÄÇЩ»ù±¾Êý¾ÝÀàÐÍ£¬StringÊDz»ÊÇ»ù±¾Êý¾ÝÀàÐÍ£¬ËûÃÇÓкÎÇø±ð¡£
2.×Ö·û´®µÄ²Ù×÷£º
дһ¸ö·½·¨£¬ÊµÏÖ×Ö·û´®µÄ·´×ª£¬È磺ÊäÈëabc£¬Êä³öcba
дһ¸ö·½·¨£¬ÊµÏÖ×Ö·û´®µÄÌæ»»£¬È磺ÊäÈëbbbwlirbbb£¬Êä³öbbbhhtccc¡£
3.Êý¾ÝÀàÐÍÖ®¼äµÄת»»
ÈçºÎ½«ÊýÖµÐÍ×Ö·ûת»»ÎªÊý×Ö£¨ ......