有时要为每一篇文章统计其点击次数,如果每一次浏览都要更新一次库的话,那性能在访问量很大的情况下,服务器的压力就会很大了,比较好一点的方法就是先将要更新的数据缓存起来,然后每隔一段时间再利用数据库的批量处理,批量更新库。源码如下: 8LM 91
!uJDhC
CountBean.java +Tug.[A
|Q)c{9sD
/* pAd 8-a
* CountData.java Xitsbf=Gg
* M@b:~mI[sw
* Created on 2007年1月1日, 下午4:44 gnPu{-Ec*
* _9Zwg+oO[
* To change this template, choose Tools | Options and locate the template under +vh 4I
* the Source Creation and Management node. Right-click the template and choose o> i`Jq&
* Open. You can then make changes to the template in the Source Editor. bW9a_m yE
*/ ySk'#\d
>
R5<D'cEN
package com.tot.count; :6r)HJ5sg
jRCG}'
/** }JePEmj
* k&h3"
* @author Y={_o!9
*/ =5jng.
public class CountBean { lQSKY}h
private String countType; bdUe,2Yi n
int countId; $ 3/G)/A
/** Creates a new instance of CountData */ Vo2{aK;
public CountBean() {} |6d0,muN
public void setCountType(String countTypes){ CtO `t5
this.countType=countTypes; U94Tp A6
} KPcOW#.T
public void setCountId(int countIds){ A=S_5y
this.countId=countIds; 1D/9lR,
} ]a}K%D)H
public String getCountType(){ ,XJ
Xw(LM
return countType; IY='tw
} sD[G?X
public int getCountId(){ Fuuy_+p@G
return countId; Ur/+nL{
} @{|vW
} :QV-!
=83FCq"
CountCache.java ta\CZp
~T_4M
/* /d\#|[S
* CountCache.java Jbrjt/OG#I
* \<bar ~
* Created on 2007年1月1日, 下午5:01 cn~M:LW23
* a2MFZe
* To change this template, choose Tools | Options and locate the template under im6Rx=}E{
* the Source Creation and Management node. Right-click the template and choose 9Rg|o CP_
* Open. You can then make changes to the template in the Source Editor. cy6lsJ"?
*/ 5A~lu4-q
.(7end<
package com.tot.count; ?7Y6: zo$^
import java.util.*; YFF\m{#
/** ]N\J~Gm
* - 9Ll'fbq
* @author #@#/M)
*/
hZ ve8J
public class CountCache { dP0%<Q|
public static LinkedList list=new LinkedList(); X{j`H\'L
/** Creates a new instance of CountCache */ t%`GXJb
public CountCache() {} t[ Zoe+&
public static void add(CountBean cb){ {|;5P.,l
if(cb!=null){ sfv{z!mo
list.add(cb); <ETR6r
} d0Jaa1b~O
} bCv^za]P6
} f""+jc1
F"k.1.
CountControl.java ?Z]5
[
U{+<c [
/* aWe?n;
* CountThread.java ;E"TOC
* [-*1M4D9
* Created on 2007年1月1日, 下午4:57 ?'@tx4#v\2
* U0PQ[Y#\
* To change this template, choose Tools | Options and locate the template under VKjDK$
* the Source Creation and Management node. Right-click the template and choose }5 2]
* Open. You can then make changes to the template in the Source Editor. a=m7pe^
*/ 0\N n.x%
yMQZulCWE
package com.tot.count; @w H+,]xE
import tot.db.DBUtils; \,b@^W6e>
import java.sql.*; @.PVUP
/** lBbUA)z6
* jI-\~
* @author ]Ywj@-*q
*/ SP,#KyWP0)
public class CountControl{ P2q'P&
private static long lastExecuteTime=0;//上次更新时间 `pHlGbrW
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 eq|G\XJ
/** Creates a new instance of CountThread */ o
IUjd
public CountControl() {} b R6g^Yf
public synchronized void executeUpdate(){ zPC&p{S>
Connection conn=null; ranLHm.nB
PreparedStatement ps=null; VeJM=s.y7
try{ Z`?Z1SBt
conn = DBUtils.getConnection(); &_