Java¡¢sql server 2000¼°jdbc
ÎÒÔÚѧϰ¹ØÓÚjava±à³Ì£¬ÏÖÔÚÉæ¼°µ½µÄÊÇsqlµÄÎÊÌ⣬±ÈÈçÈí¼þÑ¡Ôñ¡¢»·¾³µÄÁ¬½ÓÉèÖõÈÎÊÌ⣬¶ÔÓÚÕâЩÎÊÌâÎÒÕæÊÇÊøÊÖÎ޲߰¡£¡ÇëÇóJava±à³Ì¸ßÊִͽ̣º
1¡¢ÎÒÓõÄJavaÊÇj2sdk-1_4_2_13-nb-5_0£¬ÎÒÓÃÁËsql server2000£¬ÎÒÓÃjdbc3.0ÐÐÂð£¿ËùÓÐÁ¬½ÓÉèÖøÃÔõôÑùÉèÖã¿
2¡¢±ÈÈçÏÂÃæ³ÌÐò£º
import java.sql.*;
public class DBConnection
{
private static String driver="com.Microsoft.jdbc.sqlserver.SQLServerDriver";
private static String url="jdbc:microsoft:sqlserver://localhost:1433:DatabaseName=wen";
private static String user="sa";
private static String password="sa";
public static Connection getConnection()
{
Connection con;
try
{
Class.forName(driver);
con=DriverManager.getConnection(url,user,password);
return con;
}catch(ClassNotFoundException e)
{
System.out.println(e.getMessage());
}
catch(SQLException e)
{
System.out.println(e.getMessage());
}
return null;
}
}
½á¹ûÏÔʾ£ºException in thread "main" java.lang.NoSuchMethodError:mian
ÇëÎʸÃÔõô½â¾ö£¿Ð»Ð»
Ïà¹ØÎĵµ£º
ÔÚJSPÀ»ñÈ¡¿Í»§¶ËµÄIPµØÖ·µÄ·½·¨ÊÇ£ºrequest.getRemoteAddr£¨£©£¬ÕâÖÖ·½·¨Ôڴ󲿷ÖÇé¿ö϶¼ÊÇÓÐЧµÄ¡£µ«ÊÇÔÚͨ¹ýÁËApache£¬SquidµÈ·´Ïò´úÀíÈí¼þ¾Í²»ÄÜ»ñÈ¡µ½¿Í»§¶ËµÄÕæÊµIPµØÖ·ÁË¡£
¡¡¡¡
Tag£ºJava ¿Í»§¶Ë ÕæÊµIPµØÖ·
ÔÚJSPÀ»ñÈ¡¿Í»§¶ËµÄIPµØÖ·µÄ·½·¨ÊÇ£ºrequest.getRemoteAddr£¨£©£¬ÕâÖÖ·½·¨Ôڴ󲿷ÖÇé¿ ......
JavaÉè¼ÆÄ£Ê½Ö®Singletonµ¥Àýģʽƪ
java µ¥ÀýģʽµÄʵÏÖ·½Ê½
ʵÏÖ1£º
public class Singleton {
private static Singleton instance;
private Singleton (){ //Ê×ÏÈÓÐÒ»¸ö˽ÓеĹ¹ÔìÆ÷
}
  ......
jvm classLoader architecture£º
1. Bootstrap ClassLoader/Æô¶¯Àà¼ÓÔØÆ÷
Ö÷Òª¸ºÔðjdk_home/libĿ¼ÏµĺËÐÄ api »ò -Xbootclasspath Ñ¡ÏîÖ¸¶¨µÄjar°ü×°È빤×÷¡£
2. Extension ClassLoader/À©Õ¹Àà¼ÓÔØÆ÷
Ö÷Òª¸ºÔðjdk_home/lib/extĿ¼ÏµÄjar°ü»ò -Djava.ext.dirs Ö¸¶¨Ä¿Â¼ÏµÄjar°ü×°È빤×÷¡£
3 ......
1. HttpSession session = request.getSession()
ÓëHttpSession session = request.getSession(true)µÄÇø±ð£¿
²Î¿¼´ð°¸£º
getSession(true)µÄº¯ÊýÔÐÍΪ:£ºHttpSession session = request.getSession (Boolean create)
Èç¹ûÓÐÓ뵱ǰµÄrequestÏȹØÁªµÄHttpSession,ÄÇô·µ»ØrequestÏà¹ØÁªµÄHttpS ......
1£®Hibernate¹¤×÷ÔÀí¼°ÎªÊ²Ã´ÒªÓã¿
ÔÀí£º
1.¶ÁÈ¡²¢½âÎöÅäÖÃÎļþ
2.¶ÁÈ¡²¢½âÎöÓ³ÉäÐÅÏ¢£¬´´½¨SessionFactory
3.´ò¿ªSesssion
4.´´½¨ÊÂÎñTransation
5.³Ö¾Ã»¯²Ù×÷
6.Ìá½»ÊÂÎñ
7.¹Ø±ÕSession
8.¹Ø±ÕSesstionFactory
ΪʲôҪÓãº
1. ¶ÔJDB ......