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: "VfV;)]|w
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CountBean.java a!?&8$^<
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/* -Jj"JN.
* CountData.java ji~P?5(:
* C*f3PB=H_
* Created on 2007年1月1日, 下午4:44 'r2VWavT
* #FHyP1uyc
* To change this template, choose Tools | Options and locate the template under PM
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* the Source Creation and Management node. Right-click the template and choose
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* Open. You can then make changes to the template in the Source Editor. Wz^M*=,
*/ DwLl}{r'
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package com.tot.count; e[8AdE
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/** VIi/=mO]
* *Pmk1h2
* @author \;%DDw
*/ UFED*al#
public class CountBean { !UV/p"CfX
private String countType; Wxxnc#;lv
int countId; ?[ts<Ltp
/** Creates a new instance of CountData */ 1~x=bphS
public CountBean() {} 5%5z@Ka
public void setCountType(String countTypes){ @}^eyS$|!
this.countType=countTypes; TP5?%SlJ
} dLtn,qCX0^
public void setCountId(int countIds){ "Y7
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this.countId=countIds; 3X,SCG
} =?, dX
public String getCountType(){ ]DaC??%w
return countType; WRWcB
} [9O,C-Mk
public int getCountId(){ Y.<&phv
return countId; i7m=V T
} R4R SXV
} VgSk\:t
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CountCache.java 6}RRrYL7I
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/* pNHO;N[&
* CountCache.java JmR)
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* : cmQ
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* Created on 2007年1月1日, 下午5:01 ``:AF:
* Ofyz,%
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* To change this template, choose Tools | Options and locate the template under %Ny`d49&
* the Source Creation and Management node. Right-click the template and choose #xopJa Y
* Open. You can then make changes to the template in the Source Editor. l5m5H,`
*/ MZ8jL,a^
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package com.tot.count; .kGlUb?^Q
import java.util.*; 8-wW?YTG
/** Px>Gc:!>
* nn"Wn2ciS
* @author 6#JdQ[IP6
*/ wM^_pah#Y5
public class CountCache { ~4Gs\U:!Q
public static LinkedList list=new LinkedList(); MWHGB")J
/** Creates a new instance of CountCache */ nA\9UD<G.
public CountCache() {} 5G\CT&cQR
public static void add(CountBean cb){ (j%d{y4
if(cb!=null){ wlh V!a0>
list.add(cb); ;,8bb(j
} l[2 d{r
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} 2nQrCdRC
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CountControl.java G2nL#l~@)
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/* M#sDPT
* CountThread.java Ua@rp3fr
* o@o6<OP^
* Created on 2007年1月1日, 下午4:57 myVV5#{
* ~9:ILCfX
* To change this template, choose Tools | Options and locate the template under Zm:Wig
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* the Source Creation and Management node. Right-click the template and choose Qr/8kWa0C
* Open. You can then make changes to the template in the Source Editor. fC2
*/ \k=.w
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package com.tot.count; :\*<EIk(
import tot.db.DBUtils; ,6zH;fi
import java.sql.*; }@*Me+
/** GnE%C2L-
* `>1"v9eF
* @author idC4yH42
*/ PC| U]
public class CountControl{ 0`KB|=>
private static long lastExecuteTime=0;//上次更新时间 T41&;?-
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 ]to"X7/
/** Creates a new instance of CountThread */ m\h/D7zg
public CountControl() {} xb!h?F&
public synchronized void executeUpdate(){ (O
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Connection conn=null; <bwsK,C
PreparedStatement ps=null; ?
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try{ {QTrH-C
conn = DBUtils.getConnection(); \}ujSr#<