javaÁ¬½ÓmysqlÊý¾Ý¿â
Ê×ÏÈ£¬ÒªÏÂÔØÒ»¸öÁ¬½ÓmysqlÊý¾Ý¿âµÄÇý¶¯³ÌÐò: mysql-connector-java-3.0.15-ga-bin.jar, Õâ¸öÇý¶¯³ÌÐò²»ÐèÒª×öÆäËüÅäÖÃ,Ò²¾ÍÊÇ˵£¬¶ÔÓÚmysqlÊý¾Ý¿â£¬²»±ØÏñaccess»òÕßoracleÒª½¨Á¢odbcÊý¾ÝÔ´¡£
Æä´Î£¬½«ÉÏÃæµÄ.jarÎļþ¼ÓÈëµ½classpath»·¾³±äÁ¿ÖС£
×îºó£¬¾ÍÊÇд´úÂë½øÐвâÊÔÁË¡£
Ö÷Òª´úÂëÈçÏ£º
import java.sql.*;
public class Test{
private Connection conn;
private Statement stat;
public Test()
{
try
{
//Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");//¼ÓÔØÇý¶¯³ÌÐò
Class.forName("com.mysql.jdbc.Driver"); //¼ÓÔØÇý¶¯³ÌÐò
}
catch (Exception ex)
{
System.out.println("sql exception: driver ERROR!!!!");
ex.printStackTrace();
}
try
{
conn = DriverManager.getConnection("jdbc:mysql://10.64.10.100:3306/test","root","root");//½¨Á¢Á¬½Ó£¬
stat = conn.createStatement();//´´½¨Statement¶ÔÏó
}
catch (SQLException ex)
{
//sql exception
System.out.println("sql exception: connect or driver!!!!");
ex.printStackTrace();
}
}
Ïà¹ØÎĵµ£º
Ò»¡¢Ê²Ã´ÊÇ·´É䣺
·´ÉäµÄ¸ÅÄîÊÇÓÉSmithÔÚ1982ÄêÊ×´ÎÌá³öµÄ£¬Ö÷ÒªÊÇÖ¸³ÌÐò¿ÉÒÔ·ÃÎÊ¡¢¼ì²âºÍÐÞ¸ÄËü±¾Éí״̬»òÐÐΪµÄÒ»ÖÖÄÜÁ¦¡£ÕâÒ»¸ÅÄîµÄÌá³öºÜ¿ìÒý·¢Á˼ÆËã»ú¿ÆÑ§ÁìÓò¹ØÓÚÓ¦Ó÷´ÉäÐÔµÄÑо¿¡£ËüÊ×Ïȱ»³ÌÐòÓïÑÔµÄÉè¼ÆÁìÓòËù²ÉÓÃ,²¢ÔÚLispºÍÃæÏò¶ÔÏó·½ÃæÈ¡µÃÁ˳ɼ¨¡£ÆäÖÐLEAD/LEAD++ ¡¢Open ......
³ý °Ë¸ö»ù±¾ÀàÐÍ£¨Long ,short,int ,float,double,char,byte,boolean£©Í⣬ÆäËûµÄÊý¾ÝÀàÐͶ¼±»³ÆÎª“ÒýÓÃÀàÐÍ”£¬Ò²¼´£ºObject¡£ObjectµÄ²Ù×÷È«ÊÇͨ¹ý¶ÔÏóµÄÒýÓã¨Object references£©£¬ÒýÓÿÉÒÔÀí½âΪָÕ룬ÈÝÒ×ÈÃÈ˶ÔÓ¦µ½C£«£«µÄ´«Ö·ÉÏÃæÈ¥¡£ËùÒÔ£¬´ó¼ÒҪעÒâà¶£¡javaÀïÃæËä˵ûָÕ룬Æäʵȴ²»È»¡£ ......
1. °²×°mysqlµÄʱºòÑ¡Ôñ×Ö·û¼¯utf8
2. °²×°½áÊøºóÐÞ¸Ämy.ini,ÓÐÁ½¸öµØ·½ÒªÐ޸ģ¬
[mysql] default-character-set=gbk
# The default character set that will be used when a new schema or table is
# created and no character set ......
ÓÉMySQLÌṩµÄģʽƥÅäµÄÆäËûÀàÐÍÊÇʹÓÃÀ©Õ¹ÕýÔò±í´ïʽ¡£µ±Äã¶ÔÕâÀàģʽ½øÐÐÆ¥Åä²âÊÔʱ£¬Ê¹ÓÃREGEXPºÍNOT REGEXP²Ù×÷·û(»òRLIKEºÍNOT RLIKE£¬ËüÃÇÊÇͬÒå´Ê)¡£ À©Õ¹ÕýÔò±í´ïʽµÄһЩ×Ö·ûÊÇ£º
“.”Æ¥ÅäÈκε¥¸öµÄ×Ö·û¡£
Ò»¸ö×Ö·ûÀà“[...]”Æ¥ÅäÔÚ·½À¨ºÅÄÚµÄÈκÎ×Ö·û¡£ÀýÈ磬“[abc]”ƥŠ......
java¹¤×÷ÕßÉçÇøÖ÷°ì
1. ¡¾¸´Ñ¡¡¿ÊÕÈëÓÐÕÇ£¬ÓиÉÍ·
22.22%
2. ¡¾¸´Ñ¡¡¿ÊÕÈë²»ÀÖ¹Û£¬Ã»¸ÉÍ·
8.89%
3. ¡¾µ¥Ñ¡¡¿ÄêÊÕÈë50ÍòÒÔÉÏ
2.22%
4. ¡¾µ¥Ñ¡¡¿ÄêÊÕÈë20Íò~50Íò
4.44%
5. ¡¾µ¥Ñ¡¡¿ÄêÊÕÈë10Íò~20Íò ......