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: KF(N=?KO
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CountBean.java 9Kf# jZ
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/* .s Ci9d
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* CountData.java Pv,Q*gh`
* HY|=Z\l"
* Created on 2007年1月1日, 下午4:44 qD0sD2 x
* !(QDhnx}9c
* To change this template, choose Tools | Options and locate the template under g?-HAk6
* the Source Creation and Management node. Right-click the template and choose 3z5w}qN]M
* Open. You can then make changes to the template in the Source Editor. tj<a , l
*/ ;c};N(2
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package com.tot.count; t|XQFb@}
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/** 4K{<R!2I
* :jo
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* @author d'y\~M9(
*/ u6tD5Y
public class CountBean { l.gt+e
private String countType; $=) i{kGS@
int countId; <B"M} Y>_P
/** Creates a new instance of CountData */ >Z-f</v03
public CountBean() {} _\mMgZu
public void setCountType(String countTypes){ EkWipF(
this.countType=countTypes; eksYIQZ]
} &\[3m^L
public void setCountId(int countIds){ =XbOY[
this.countId=countIds; PH$fDbC8
} \r4QS
public String getCountType(){ "lU%Pm]>
return countType; 9'tOF
} =gG_ %]``R
public int getCountId(){ ;G
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return countId; 3JnBKh\n
} Dj 0`#~
} %#g9d
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CountCache.java ~_|OGp_a
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/* ZMFV iE;8
* CountCache.java -^a?]`3_v
* +=Xgi$
* Created on 2007年1月1日, 下午5:01 02|f@bP.
* fYv= yP~
* To change this template, choose Tools | Options and locate the template under F?>rWP
* the Source Creation and Management node. Right-click the template and choose ~QVN^8WPg
* Open. You can then make changes to the template in the Source Editor. 4|PNsHXt
*/ 8+gti*C?\
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package com.tot.count; io8c[#"uU
import java.util.*; f[}N
/** n4* hQi+d
* Av3qoH)[<
* @author $%*E)~
*/ ?$:;hGO.<~
public class CountCache { }\p>h
public static LinkedList list=new LinkedList(); \Pv_5LAo
/** Creates a new instance of CountCache */ 6L`{oSX!
public CountCache() {} wTT_jyH)
public static void add(CountBean cb){ g`('
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if(cb!=null){ =SY5E{`4p
list.add(cb); OB-2xmZW
} N001c)*7Q
} IO, kGUS
} i Eh
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CountControl.java Woo2hg-ti
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/* 7.G1Q]6/
* CountThread.java f{]eb1
* Km)5;BQxg
* Created on 2007年1月1日, 下午4:57 $m$tfa-
* =e<;B_~.
* To change this template, choose Tools | Options and locate the template under y1zNF$<q
* the Source Creation and Management node. Right-click the template and choose W`$D*X0*o
* Open. You can then make changes to the template in the Source Editor. |(mr&7O
*/ -]!m4xvK
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package com.tot.count; W> ZL[BQ
import tot.db.DBUtils; A..,.
import java.sql.*; ?2#!63[Kg
/** h}vzZZ2,
* pWU3?U
* @author b?h)~j5
*/ ) ?AlQA
public class CountControl{ cy0
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private static long lastExecuteTime=0;//上次更新时间 \ow3_^Bk
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 < C{-ph
/** Creates a new instance of CountThread */ MT`gCvoF4P
public CountControl() {} a,B2;4"
public synchronized void executeUpdate(){ )+'De
Connection conn=null; c^N'g!on
PreparedStatement ps=null; 2<