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
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 ......
javaÉè¼ÆÄ£Ê½Ñ§Ï°1££Singleton Pattern
¡¡¡¡Ç°Ð©Ìì°ÚŪjava£¬²Î¿¼Ò»Ð©×ÊÁÏдÁ˸öÊý¾Ý¿âÁ¬½Ó³Ø£¬¶ÔÀïÃæÖ»²úÉúÒ»¸öʵÀýµÄÄÇÖÖ×ö·¨Éî±íÅå·þ£¬½ñÌìÖÐÎçÓÖÌýµ½±ðÈËÔÚ˵Éè¼ÆÄ£Ê½£¬Êܲ»ÁËÁË£¬¾ÍÉÏÍøDownÁ˵ã×ÊÁÏÀ´¡£
¡¡¡¡Ò»À´¾Í¿´µ½ÁËSingletonģʽ£¬Ò»¿´£¬Ñ½£¬²»¾ÍÊÇÄǸöÁ¬½Ó³ØÀïÓõķ½·¨Ã´?!àÞ£¬ÔÀ´Èç´Ë¡£
¡¡¡¡Singleton Ê ......
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 ......
ÎÒÃÇ´ó¼Ò¶¼ÖªµÀ£¬¶ÔÓÚ¾²Ì¬±äÁ¿¡¢¾²Ì¬³õʼ»¯¿é¡¢±äÁ¿¡¢³õʼ»¯¿é¡¢¹¹ÔìÆ÷£¬ËüÃǵijõʼ»¯Ë³ÐòÒÔ´ËÊÇ£¨¾²Ì¬±äÁ¿¡¢¾²Ì¬³õʼ»¯¿é£©>£¨±äÁ¿¡¢³õʼ»¯¿é£©>¹¹ÔìÆ÷¡£ÎÒÃÇÒ²¿ÉÒÔͨ¹ýÏÂÃæµÄ²âÊÔ´úÂëÀ´ÑéÖ¤ÕâÒ»µã£º
public class InitialOrderTest {
// ¾²Ì¬±äÁ¿
public static String staticField = "¾²Ì¬±äÁ¿";
// ±äÁ¿
......
´«ÖDz¥¿ÍJAVAÅàѵOAÏîÄ¿2010-5-12
½ñÌì»»Á˸öнÌÊÒ£¬ÖÕÓÚ½áÊøÁËÃÆÈÈµÄ¿ÕÆøÁË¡£ÒÔǰ½ÌÊÒ¿Õµ÷´ó´óµÄÓÐÎÊÌ⣬ÏÖÔÚºÃÁË£¬¿ÉÒÔÒ»Ïí¿Õµ÷µÄÁ¹Ë¬£¬Ö»²»ÊÇΨһÃÀÖв»×ãµÄÊÇ£¬¾ÓÈ»ÓõIJ»ÊǸñÁ¦¿Õµ÷¡£ÔÚ¸ñÁ¦¿Õµ÷´ôÁËËÄÄ꣬ËäÈ»ÔÚÄǶùûÓз¢»Ó³öÎÒ¸üºÃµÄˮƽ£¬µ«ÊÇÈ˱Ͼ¹ÊÇÓиÐÇéµÄ£¬ÎÒÒ²ºÜ°®ÄǸö¸ñÁ¦£¬´ó¹«Ë¾£¬´óÆøÆÇ£¬ÌرðÊÇ£¬ÎÒà ......