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

mysqlÂÒÂëÎÊÌâ

½â¾öMySqlÊý¾ÝÂÒÂë:
1 д¹ýÂËÆ÷ÉèÖñàÂë¸ñʽ(¸ñʽºÍJSPÒ³ÃæµÄ±àÂëÒ»Ñù)£¬»òÔòÔÚÇëÇóÀïÃæÐ´request.setCharacterEncoding("±àÂ뷽ʽ");
2 Èç¹ûÊDzéѯ³öÊý¾ÝÂÒÂ룬ÔÚÁ´½ÓµÄURLÉϼÓÉϱàÂë¸ñʽ(ÄãÕâÀï¼ÓÁË£¬Ã»ÎÊÌâ);
3 ÐÞ¸Ämy.iniÎļþÀïÃæµÄ default-character-set= ÄúÒªµÄ±àÂë¸ñʽ (Ò»¹²ÓÐÁ½´¦£¬Äã²éÕÒһϠ¸ÄΪһÑùµÄ±àÂë¸ñʽ)
3 Èç¹ûÊÇдÈëµ½Êý¾Ý¿âÖ®ºóÊÇÂÒÂë(ǰÌáÊÇÒѾ­Ð´Á˹ýÂËÆ÷´¦Àí±àÂë),ÐÞ¸Ämy.iniÎļþÀïÃæ²éÕÒsql-mode ÉèÖà sql-mode = 
  "NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION";
ÊÔÊÔ°É£¡
  ÕâÊÇËùÓÐÂÒÂëµÄÇé¿ö£¡ ÎÒÓõÄÊÇMYSQL5.0 ½â¾öÂÒÂë¾ÍÕâÑù¸ãµÄ£¡£¡£¡£¡£¡£¡£¡
Êý¾Ý¿â±àÂë²ÉÓÃUTF8£¬Í¬Ñù£¬ÐÞ¸ÄÁ¬½Ó×Ö·û´®Îª£ºjdbc:mysql://localhost:3306/BookDB?useUnicode=true&characterEncoding=utf8
½«ÄãµÄdefault-character-set=latin1 ¸Ä³Édefault-character-set=gbkÊÔÊÔ.
ÔÚ°²×°µÄʱºòÑ¡ÔñGBK¾Í¿ÉÒÔ.»òÕßÔÚMY.INIÀïÃæ¸ÄÒ²¿ÉÒÔ.
д¹ýÂËÆ÷ÉèÖñàÂë¸ñʽ¡£
»òÕßÊǰѴÓÊý¾Ý¿âÖжÁ³öµÄ×Ö·ûÏÈת³ÉbyteÊý×飬ÔÚ±àÂë³Éutf-8,±£Ö¤½â¾öÎÊÌâ
½â¾ö·½·¨:
ËùÓеıàÂ붼ʹÓÃÒ»ÖÖÈç:utf8
1.Êý¾Ý¿â±àÂë:
  String dbUrl = "jdbc:mysql://localhost:3306/BookDB&useUnicode=true&characterEncoding=utf8";
2.jsp±àÂë
<%@ page language="java" contentType="text/html; charset=utf8"%>
3.Ôö¼Ó¼Ç¼µÄ¶¼×ª»»Îªutf8±àÂëÈçÏÂ:
  content = new String(content.getBytes("iso8859-1"),"utf8"));
 Ðí¶à×Ö·û´®Êý¾ÝÀàÐ͵ÄÁж¨Òå¿ÉÒÔ°üÀ¨Ö¸¶¨×Ö·û¼¯µÄCHARACTER SETÊôÐÔ£¬Ò²¿ÉÄܰüÀ¨Ð£¶Ô¹æÔò¡£(CHARSETÊÇCHARACTER SETµÄÒ»¸öͬÒå´Ê£©¡£ÕâЩÊôÐÔÊÊÓÃÓÚCHAR¡¢VARCHAR¡¢TEXTÀàÐÍ¡¢ENUMºÍSET¡£ÀýÈ磺
·                CREATE TABLE t
·                (
·                    c1 CHAR(20) CHARACTER SET utf8,
·                    c2 CHAR(20) CHARACTER SET latin1 COLLATE l


Ïà¹ØÎĵµ£º

ÓÃJAVAдÈëºÍ¶ÁÈ¡MYSQLµÄͼƬµÄʵÀý

Ö÷ÒªµÄ³ÌÐò£º
package greeds.jdbc.sample;
import greeds.jdbc.util.JDBCUtil;
import java.io.*;
import java.sql.*;
public class MySQLBlobSample {
 public static void main(String[] args) throws Exception {
  // дÈëÊý¾Ý¿â
  /*
   *
   * Connection ......

Mysql my.ini ÅäÖÃÎļþÏê½â

Mysql my.ini ÅäÖÃÎļþÏê½â
#BEGIN CONFIG INFO
#DESCR: 4GB RAM, ֻʹÓÃInnoDB, ACID, ÉÙÁ¿µÄÁ¬½Ó, ¶ÓÁиºÔØ´ó
#TYPE: SYSTEM
#END CONFIG INFO
#
# ´ËmysqlÅäÖÃÎļþÀý×ÓÕë¶Ô4GÄÚ´æ
# Ö÷ҪʹÓÃINNODB
#´¦Àí¸´ÔÓ¶ÓÁв¢ÇÒÁ¬½ÓÊýÁ¿½ÏÉÙµÄmysql·þÎñÆ÷
#
# ½«´ËÎļþ¸´ÖƵ½/etc/my.cnf ×÷Ϊȫ¾ÖÉèÖÃ,
# mysql-data-d ......

Mysql Explain Ïê½â[Ç¿ÁÒÍÆ¼ö]

Mysql Explain Ïê½â
Ò».Óï·¨
explain < table_name >
ÀýÈç: explain select * from t3 where id=3952602;
¶þ.explainÊä³ö½âÊÍ
+----+-------------+-------+-------+-------------------+---------+---------+-------+------+-------+
| id | select_type | table | type  | possible_keys  &nb ......

mysql³£¼û´íÎóÌáʾ¼°½â¾ö·½·¨

130 £ºÎļþ¸ñʽ²»ÕýÈ·¡££¨»¹²»ÊǺÜÇå³þ´íÎóµÄ×´¿ö£©
145  £ºÎļþÎÞ·¨´ò¿ª¡£
1005£º´´½¨±íʧ°Ü¡£
1006£º´´½¨Êý¾Ý¿âʧ°Ü¡£
1007£ºÊý¾Ý¿âÒÑ´æÔÚ£¬´´½¨Êý¾Ý¿âʧ°Ü¡£
1008£ºÊý¾Ý¿â²»´æÔÚ£¬É¾³ýÊý¾Ý¿âʧ°Ü¡£
1009£º²»ÄÜɾ³ýÊý¾Ý¿âÎļþµ¼ÖÂɾ³ýÊý¾Ý¿âʧ°Ü¡£
1010£º²»ÄÜɾ³ýÊý¾ÝĿ¼µ¼ÖÂɾ³ýÊý¾Ý¿âʧ°Ü¡£
1011£ºÉ ......

mysqlÐÞ¸ÄÃÜÂë(°üÀ¨ÃÜÂëÍü¼ÇµÄÇé¿ö)

ÐÞ¸ÄrootÃÜÂëµÄʱºò°´ÕÕÍøÉϵÄ˵µÄ¾ÓȻɵɵµÄÖ´ÐÐÁËupdate user set password="asdf" where user="root"£»Ö´ÐÐÖ®ºó·¢ÏÖÃÜÂë´íÁË£¬½øÈ¥²»ÁË£¬ÓÚÊÇÕÛÌÚÁ˰ëÌ죬·¢ÏÖmysqlµÄÃÜÂëÊǼÓÃܵIJ»ÊÇÃ÷ÎÄ´æ´¢µÄ£¬ËùÒԸĵÄʱºòÐèÒªÕâÑùset password=password("asdf")¡£´íÎóÒѾ­·¢ÉúÁË£¬ÓÚÊǾͰ´ÕÕÏÂÃæµÄ· ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ