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: x] wi&
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CountBean.java FA-cTF[,(
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/* c+3(|k-M
* CountData.java 87! jn'A
* dnD@BQ
* Created on 2007年1月1日, 下午4:44 >|%3j,<U
* [6l0|Y
* To change this template, choose Tools | Options and locate the template under F;#$Q
* the Source Creation and Management node. Right-click the template and choose Y }VJ4!%U
* Open. You can then make changes to the template in the Source Editor. }'wZ)N@
*/ Lm}.+.O~d
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package com.tot.count; -b!Z(}JK
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/** F,S)P`?
* yrEh5v:
* @author }@6Ze$>
*/ QD%xmP
public class CountBean { 26aDPTP $<
private String countType; YNV,
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int countId; &'^.>TJ\
/** Creates a new instance of CountData */ )@DDs(q=i
public CountBean() {} =!SV;^-q
public void setCountType(String countTypes){ n32"cFPpT
this.countType=countTypes; Rnwm6nu
} (Nc~l ^a
public void setCountId(int countIds){ Vc5>I_
this.countId=countIds; ^*f D
} }d;2[fR)
public String getCountType(){ \ejHM}w3,
return countType; tm5{h{AM
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public int getCountId(){ '9u?lA^9$
return countId; jA9uB.I,"b
} AcuZ?LYzK
} ,(q]
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CountCache.java 0#TL$?=|
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/*
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* CountCache.java f$:Y'$Z1
* 5B)&;[
* Created on 2007年1月1日, 下午5:01 39O rY
* G8vDy1`q6
* To change this template, choose Tools | Options and locate the template under G 3U[)("
* the Source Creation and Management node. Right-click the template and choose X[Ufq^fyA
* Open. You can then make changes to the template in the Source Editor. /v9qrZ$$
*/ R/"f
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package com.tot.count; bj@sci(1?
import java.util.*; GFLat
/** =$4I}2
* f@YdL6&d-
* @author BhDg\oxZ
*/ +0U=UV)U
public class CountCache { s1wlO y
public static LinkedList list=new LinkedList(); d@ 8M_
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/** Creates a new instance of CountCache */ :AlvWf$d
public CountCache() {} !dwZ` D
public static void add(CountBean cb){ P6kDtUXF
if(cb!=null){ mWZP.w^-
list.add(cb); 'i$._Tx
} gk| %
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} !`N:.+DT
} pnSKIn
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CountControl.java 36{OE!,i
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/* eEBNO*2
* CountThread.java OF`J{`{r
* xz0t8`NoN
* Created on 2007年1月1日, 下午4:57 ) ??N]V_U
* ;MNUT,U
* To change this template, choose Tools | Options and locate the template under c!
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* the Source Creation and Management node. Right-click the template and choose fx+_;y
* Open. You can then make changes to the template in the Source Editor. KF#^MEw%
*/ I1m[M?
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package com.tot.count; dQSO8Jf
import tot.db.DBUtils; Pa0W|q#?X
import java.sql.*; >ye.rRZd`
/** M`K]g&57hL
* mW!n%f
* @author <eMqg u
*/ V-#JV@b
public class CountControl{ RiAg:
private static long lastExecuteTime=0;//上次更新时间 rfVQX<95=/
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 |dEPy-Xe
/** Creates a new instance of CountThread */ o_Z9\'u
public CountControl() {} ZqrS]i@$
public synchronized void executeUpdate(){ ,gNZHKNq
Connection conn=null; u-&V