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. ʲôÊÇSerialization?
´®Ðл¯(Serialization)ÊǼÆËã»ú¿ÆÑ§ÖеÄÒ»¸ö¸ÅÄËüÊÇÖ¸½«¶ÔÏó´æ´¢µ½½éÖÊ£¨ÈçÎļþ¡¢ÄÚÔÚ»º³åÇøµÈ£©ÖлòÊÇÒÔ¶þ½øÖÆ·½Ê½Í¨¹ýÍøÂç´«Êä¡£Ö®ºó ¿ÉÒÔͨ¹ý·´´®Ðл¯´ÓÕâЩÁ¬ÐøµÄλÊý¾ÝÖØÐ¹¹½¨Ò»¸öÓëÔʼ¶ÔÏó״̬ÏàͬµÄ¶ÔÏó£¬Òò´ËÔÚÌØ¶¨Çé¿öÏÂÒ²¿ÉÒÔ˵Êǵõ½Ò»¸ö¸±±¾£¬µ«²¢²»ÊÇËùÓÐÇé¿ö¶¼ÕâÑù¡£
JavaÓÐS ......
POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream(cfname));
HSSFWorkbook wb = new HSSFWorkbook(fs);
......
JavaÉè¼ÆÄ£Ê½Ö®Singletonµ¥Àýģʽƪ
java µ¥ÀýģʽµÄʵÏÖ·½Ê½
ʵÏÖ1£º
public class Singleton {
private static Singleton instance;
private Singleton (){ //Ê×ÏÈÓÐÒ»¸ö˽ÓеĹ¹ÔìÆ÷
}
  ......
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 ......