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: ]^63n/Twj
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CountBean.java vl'2O7
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/* z&6TdwhV
* CountData.java =h4*
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* l$_Yl&!q$
* Created on 2007年1月1日, 下午4:44 3O:gZRxK
* N!fTt,
* To change this template, choose Tools | Options and locate the template under 'NJCU.lKm
* the Source Creation and Management node. Right-click the template and choose 5+gSpg]i
* Open. You can then make changes to the template in the Source Editor. YRy5.F%?
*/ $RYsqX\v
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package com.tot.count; BN?OvQ
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/** WzC_M>_
* IfH*saN7
* @author |G5Me
*/ %b
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public class CountBean { KKz{a{ePY%
private String countType; j5,vSh~q;'
int countId; AC$:.KLI
/** Creates a new instance of CountData */ q5irKT*Hs
public CountBean() {} 1%?J l~M
public void setCountType(String countTypes){ pD+_ K
this.countType=countTypes; a/Cd;T2
} .7ZV:m
public void setCountId(int countIds){ k|^e=I
this.countId=countIds; m{/?6h 1
} b|cUKsL5
public String getCountType(){
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return countType; z4snH%q
} V'";u?h#S
public int getCountId(){ |g3a1El
return countId; F0O/SI(cA
} P+m{hn~%
} Hq{i-z+
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CountCache.java ZE ())W"
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/* ;_.%S *W\
* CountCache.java !z
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* Sc!{
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* Created on 2007年1月1日, 下午5:01 qjsS2,wM
* [dK5kO
* To change this template, choose Tools | Options and locate the template under 0u]!C"VX
* the Source Creation and Management node. Right-click the template and choose Xgge_`T9
* Open. You can then make changes to the template in the Source Editor. ] Fx9!S
*/ 1]L 0r
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package com.tot.count; X
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import java.util.*; t,*hxzD"
/** T9@W,0#
* &TmN^R>
* @author #PzRhanX
*/ p nS{W
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public class CountCache { kvzGI>H:
public static LinkedList list=new LinkedList(); E1U~ew
/** Creates a new instance of CountCache */ A8?uCkG
public CountCache() {} &*wN@e(c
public static void add(CountBean cb){ @O7hY8",
if(cb!=null){ H1]An'qz,
list.add(cb); q;dg,Om
} wt;7+
} w&eX)!
} vjy 59m
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CountControl.java 3x=f}SO&
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/* 3|=9aM^ x^
* CountThread.java #S57SD
* =Fq"lq %
* Created on 2007年1月1日, 下午4:57 "t4$%7L]
* k^
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* To change this template, choose Tools | Options and locate the template under vJheM*C
* the Source Creation and Management node. Right-click the template and choose |U*wMYC
* Open. You can then make changes to the template in the Source Editor. !2)$lM1@J
*/ SjT8eH #
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package com.tot.count; ,k*g`OTW
import tot.db.DBUtils; l2)) StEm
import java.sql.*; tpJe1 J<
/** &-Bw7v
* G+^Q
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* @author JG%y_
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*/ ^-,
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public class CountControl{ UN7>c0B
private static long lastExecuteTime=0;//上次更新时间 "r6DZi(^K
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 wI!>IV(5
/** Creates a new instance of CountThread */ ?U~9d"2=
public CountControl() {} <P)vx
public synchronized void executeUpdate(){ K,7IBv,B[
Connection conn=null; /8\gT(@
PreparedStatement ps=null; 1epj/bB&