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: qD!qSM
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CountBean.java ;=r_R!d@
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/* t`%Xxxu
* CountData.java `-yo-59E[
* Fp=O:]
* Created on 2007年1月1日, 下午4:44 zp.-=)D4e
* #O<,
* To change this template, choose Tools | Options and locate the template under ;D'6sd"
* the Source Creation and Management node. Right-click the template and choose >x'R7z23
* Open. You can then make changes to the template in the Source Editor. N5K\h}'%
*/ Z8 eB5!$
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package com.tot.count; (+aU ,EQ
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/** ?5VPV9EX
* '/O >#1
* @author b}<?& @
*/ yVZLZLm
public class CountBean { `|=hl~
private String countType; w&F.LiX^
int countId; n[+$a)$8
/** Creates a new instance of CountData */ sQ";
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public CountBean() {} }aSTo"~m#
public void setCountType(String countTypes){ [8%R*}
this.countType=countTypes; [a201I0 -
} o|`%>&jP
public void setCountId(int countIds){ <b>g^ `}?D
this.countId=countIds; +PAb+E|,
} {#U3A_y
public String getCountType(){ Rq`d I~5!b
return countType; hlKM4JT\
} @{V bu
public int getCountId(){ T@H<Fm_
return countId; Te d1Ky2O
} xky +"
} 4>R)2g
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CountCache.java CNMcQP
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/* U,Q
* CountCache.java IEmjWw4
* o{[w6^D7
* Created on 2007年1月1日, 下午5:01 |&u4Q /0
* dQljG.PiK
* To change this template, choose Tools | Options and locate the template under BS*Y3 $
* the Source Creation and Management node. Right-click the template and choose XU5GmGu_+
* Open. You can then make changes to the template in the Source Editor. AJYZ`
*/ 0]k-0#JM
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package com.tot.count; }j`#s
import java.util.*; jCp^CNbA
/** 2QIx~Er
* %n B}Hq ;
* @author _ci8!PP
*/ IeN~E'~
public class CountCache { )=TS)C4
public static LinkedList list=new LinkedList(); j"5 $m@lgn
/** Creates a new instance of CountCache */ ;s\ck:Xg
public CountCache() {} ^!A@:}t>
public static void add(CountBean cb){ CpLLsp hy
if(cb!=null){ ;Z 6ngS
list.add(cb); B>r>z5
} F a+#bX7
} T|^KG<uPV!
} R1?LB"aN
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CountControl.java 9M;k(B!
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/* b|Sjh;
* CountThread.java ?v,4seRuz
* S;tv4JY
* Created on 2007年1月1日, 下午4:57 lvp8{]I<
* >Q#\X=a>
* To change this template, choose Tools | Options and locate the template under fx=HK t
* the Source Creation and Management node. Right-click the template and choose IeT1Jwe
* Open. You can then make changes to the template in the Source Editor. ]@A31P4t|
*/ b wqd`C
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package com.tot.count; |%$mN{
import tot.db.DBUtils; jI!WE$dt
import java.sql.*; }AGdWt@
/** /NB;eV?
* -izZ D
* @author VMl)_M:'
*/ ]I:h4hgw
public class CountControl{ 0eFvcH:qG
private static long lastExecuteTime=0;//上次更新时间 M
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private static long executeSep=60000;//定义更新间隔时间,单位毫秒 !n3J6%b9y/
/** Creates a new instance of CountThread */ >A.m`w
public CountControl() {} 2)T.Ci cx
public synchronized void executeUpdate(){ W.m2`] &