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: o^'QGs "
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CountBean.java uH(M@7"6_!
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/* xj9xUun
* CountData.java 0x<G\ l4
* Q5l+-
* Created on 2007年1月1日, 下午4:44 %eh.@8GL`
* ]826k pq_
* To change this template, choose Tools | Options and locate the template under j<6+p
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* the Source Creation and Management node. Right-click the template and choose |j{]6Nu
* Open. You can then make changes to the template in the Source Editor.
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*/ aK]AhOG
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package com.tot.count; tK?XU9o
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/** pe>?m ^gz[
* Jw>na _FJ
* @author 2kk; z0f
*/ OOXP1L
public class CountBean { -%Ce
private String countType; =diGuIB
int countId; rg=Ym.
/** Creates a new instance of CountData */ K`j:F>b
public CountBean() {} aL&9.L|1g
public void setCountType(String countTypes){ NTO.;S|2%
this.countType=countTypes; ]>ndFE6kl
} d c_2nF
public void setCountId(int countIds){ PRNq8nmxC
this.countId=countIds; ; xQhq*
} nywC]T
public String getCountType(){ ep0dT3&
return countType; Dd,i^,4Gj
} -1~o~yGE
public int getCountId(){ AX'-}5T=
return countId; L
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} X<pNc6
} 5sj$XA?5
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CountCache.java FD~
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/* NxDVU?@p*
* CountCache.java 3lEP:Jp
* aT+w6{%Z
* Created on 2007年1月1日, 下午5:01 /d/]#T[Z9
* i2;,\FI@t%
* To change this template, choose Tools | Options and locate the template under Vg :''!4t2
* the Source Creation and Management node. Right-click the template and choose P}>>$$b\Yi
* Open. You can then make changes to the template in the Source Editor. VR%*8=
*/ ,rF!o_7
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package com.tot.count; 3OY(L`
import java.util.*; &}|`h8JA]K
/** @?;)x&<8?3
* JoZzX{eu"
* @author H0yM`7[y
*/ e
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public class CountCache { sY?wQ:
public static LinkedList list=new LinkedList(); rx@i.+
/** Creates a new instance of CountCache */ !,rF(pz
public CountCache() {} D~|q^Ms,%
public static void add(CountBean cb){ 5*Qzw[[=
if(cb!=null){ Y7 K2@257
list.add(cb); E1`_[=8a9
} R~|(]#com
} ${}9/(x/^
} 2- (}=N
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CountControl.java :#{0yno)H
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/* *J
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* CountThread.java yF_/.m I
* _34%St!lg
* Created on 2007年1月1日, 下午4:57 @v!#_%J
* {x[C\vZsi]
* To change this template, choose Tools | Options and locate the template under }_mMQg2>=
* the Source Creation and Management node. Right-click the template and choose 1mR@Bh
* Open. You can then make changes to the template in the Source Editor. fF=tT C
*/ ]{#Xcqx
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package com.tot.count; 1CM8P3
import tot.db.DBUtils; )q\6pO@
import java.sql.*; KoWG:~>|
/** #`l&HV
* I3i zLi
* @author +"JWsD(C(
*/ :f7vGO"t
public class CountControl{ iP:^nt?
private static long lastExecuteTime=0;//上次更新时间 :_nGh]%
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 ~"4Cz27
/** Creates a new instance of CountThread */ %M`zkA2]J
public CountControl() {} Asq&Z$bB_
public synchronized void executeUpdate(){ -/*VR$c
Connection conn=null; $2blF)uYE
PreparedStatement ps=null; u6IM~kk>5
try{ a40>_;}:x
conn = DBUtils.getConnection(); ae2SU4Jx
conn.setAutoCommit(false); Z:V<