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public String login(HttpServletRequest request){
   OperatorService operatorService = new OperatorService();
   WebContext webContext= request.getSession().getAttribute("WEB_CONTEXT_KEY");
Connection conn=null;
try{
      Conection conn =DBManager.getConnection();
       if(webContext.getOperatorName.equals("123")){
          // µÇ½³É¹¦
      }
}catch(Throwable t){
   //¼Ç¼ÈÕÖ¾
//Ìø×ªµ½Í³Ò»µÄ´íÎóÒ³Ãæ,²»ÄÜÈÃÓû§¿´µ½Òì³£Ò³Ãæ
       //¹Ø±ÕConnection
       if(conn!=null){
           try{conn.close();}cath(SQLException ex){}
     }
   }
}
public String logOut(HttpServletRequest request){
   OperatorService operatorService = new OperatorService();
   WebContext webContext= request.getSession().getAttribute("WEB_CONTEXT_KEY");
try{
       Conection conn =DBManager.getConnection();
        operatorService.logout();
      request.getSession().invalidate();
}catch(Throwable t){
   //¼Ç¼ÈÕÖ¾
//Ìø×ªµ½Í³Ò»µÄ´íÎóÒ³Ãæ,²»ÄÜÈÃÓû§¿´µ½Òì³£Ò³Ãæ
       //¹Ø±ÕConnection
       if(conn!=null){
           try{conn.close();}cath(SQLException ex){}
     }
   }
}
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1.Ïȶ¨ÒåÒ»¸ö»Øµ÷³éÏóÀà
public abstract class AppCallback {
    /**
    * »Øµ÷Ö´Ðз½·¨
    *
    * @return
    */
    public String execute() {
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sql 2005 ´æ´¢¹ý³Ì·ÖÒ³ java ´úÂë

 create PROCEDURE pagelist
@tablename nvarchar(50),
@fieldname nvarchar(50)='*',         
@pagesize int output,--ÿҳÏÔʾ¼Ç¼ÌõÊý
@currentpage int output,--µÚ¼¸Ò³
@orderid nvarchar(50),--Ö÷¼üÅÅÐò
@sort int,--ÅÅÐò·½Ê½£¬1±íʾÉýÐò£¬0±íʾ½µÐòÅÅÁÐ ......

Java ÀíÂÛÓëʵ¼ù: ÕýȷʹÓà Volatile ±äÁ¿

Java™ ÓïÑÔ°üº¬Á½ÖÖÄÚÔÚµÄͬ²½»úÖÆ£ºÍ¬²½¿é£¨»ò·½·¨£©ºÍ volatile ±äÁ¿¡£ÕâÁ½ÖÖ»úÖÆµÄÌá³ö¶¼ÊÇΪÁËʵÏÖ´úÂëÏ̵߳ݲȫÐÔ¡£ÆäÖÐ Volatile ±äÁ¿µÄͬ²½ÐԽϲµ«ÓÐʱËü¸ü¼òµ¥²¢ÇÒ¿ªÏú¸üµÍ£©£¬¶øÇÒÆäʹÓÃÒ²¸üÈÝÒ׳ö´í¡£ÔÚÕâÆÚµÄ Java ÀíÂÛÓëʵ¼ù
ÖУ¬Brian Goetz ½«½éÉܼ¸ÖÖÕýȷʹÓà volatile ±äÁ¿µÄģʽ£¬²¢Õë¶ÔÆäÊÊÓ ......

javaÖÐÈÕÆÚ¡¢ÈÕÆÚ¸ñʽ¡¢ÈÕÆÚ¼ÆËãѧϰ±Ê¼Ç

2. Calendar ¶ÔÏóµÄÈÝ´íÐÔ£¬Lenient ÉèÖà ÎÒÃÇÖªµÀÌØ¶¨µÄÔ·ÝÓв»Í¬µÄÈÕÆÚ£¬µ±Ò»¸öÓû§¸ø³ö´íÎóµÄÈÕÆÚʱ£¬Calendar ÈçºÎ´¦ÀíµÄÄØ£¿ import java.io.*;
import java.util.*; public class WhatIsCalendar
{
    public static void main(String[] args) throws Exception{
   ......

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µÄÀý×ÓÀ´ËµÃ÷£¬Õâ ......

×î´ó³Ë»ýµÄN 1ÏֻÓó˷¨²»ÄÜÓó˷¨ (Java)ʵÏÖ

package algorithm.misc;
import util.*;
public class MaxProductOfN1 {
    private static int exceptIndex = -1;
   
    public static long regMethod(int data[])
    {
        long ret = Long.MIN_VALUE;
& ......
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