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/**
* SimpleHttpServer.java
*/

import java.io.*;
import java.net.*;
import java.util.StringTokenizer;

/**
* Ò»¸ö¼òµ¥µÄÓà Java Socket ±àдµÄ HTTP ·þÎñÆ÷Ó¦ÓÃ, ÑÝʾÁËÇëÇóºÍÓ¦´ðµÄЭÒéͨÐÅÄÚÈÝÒÔ¼°
* ¸ø¿Í»§¶Ë·µ»Ø HTML Îı¾ºÍ¶þ½øÖÆÊý¾ÝÎļþ(Ò»¸öͼƬ), ͬʱչʾÁË 404, 200 µÈ״̬Âë.
* Ê×ÏÈÔËÐÐÕâ¸ö³ÌÐò,È»ºó´ò¿ªWebä¯ÀÀÆ÷,¼üÈëhttp://localhost,ÔòÕâ¸ö³ÌÐòÄܹ»ÏÔʾ³öä¯ÀÀÆ÷·¢ËÍÁËÄÇЩÐÅÏ¢
* ²¢ÇÒÏòä¯ÀÀÆ÷·µ»ØÒ»¸öÍøÒ³ºÍÒ»¸±Í¼Æ¬, ²¢²âÊÔͬä¯ÀÀÆ÷¶Ô»°.
* µ±ä¯ÀÀÆ÷¿´µ½ HTML ÖдøÓÐͼƬµØÖ·Ê±, Ôò»á·¢³öµÚ¶þ´ÎÁ¬½ÓÀ´ÇëÇóͼƬµÈ×ÊÔ´.
* Õâ¸öÀý×Ó¿ÉÒÔ°ïÄúÀí½â Java µÄ HTTP ·þÎñÆ÷Èí¼þÊÇ»ùÓÚ J2SE µÄ Socket µÈÈí¼þ±àдµÄ¸ÅÄî, ²¢ÊìϤ
* HTTP ЭÒé.
* Ïà·´µÄÓà Telnet Á¬½Óµ½ÒÑÓеķþÎñÆ÷Ôò¿ÉÒÔ°ïæÀí½âä¯ÀÀÆ÷µÄÔËÐйý³ÌºÍ·þÎñÆ÷¶ËµÄ·µ»ØÄÚÈÝ.
*
* <pre>
*      µ±Óû§ÔÚWebä¯ÀÀÆ÷µØÖ·À¸ÖÐÊäÈëÒ»¸ö´øÓÐhttp://ǰ׺µÄURL²¢°´ÏÂEnterºó,»òÕßÔÚWebÒ³ÃæÖÐij¸öÒÔhttp://¿ªÍ·µÄ³¬Á´½ÓÉϵ¥»÷Êó±ê,HTTPÊÂÎñ´¦ÀíµÄµÚÒ»¸ö½×¶Î--½¨Á¢Á¬½Ó½×¶Î¾Í¿ªÊ¼ÁË.HTTPµÄĬÈ϶˿ÚÊÇ80.
*    Ëæ×ÅÁ¬½ÓµÄ½¨Á¢,HTTP¾Í½øÈëÁ˿ͻ§Ïò·þÎñÆ÷·¢ËÍÇëÇóµÄ½×¶Î.¿Í»§Ïò·þÎñÆ÷·¢Ë͵ÄÇëÇóÊÇÒ»¸öÓÐÌØ¶¨¸ñʽµÄASCIIÏûÏ¢,ÆäÓï·¨¹æÔòΪ:
* < Method > < URL > < HTTP Version > <\n>
* { <Header&


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