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: (CY D]n
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CountBean.java }z$_!)/i
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/* #o7)eKeQ
* CountData.java E}v8Q~A(
* }Z FoCMM
* Created on 2007年1月1日, 下午4:44 |w54!f6w_
* /t`\b
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* To change this template, choose Tools | Options and locate the template under cz{`'VN}`
* the Source Creation and Management node. Right-click the template and choose ge:a{L
* Open. You can then make changes to the template in the Source Editor. &)gc{(4$
*/ =y _KL
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package com.tot.count; BAY e:0
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/** 8V 4e\q
* xPPA8~Dm*
* @author BV:Ca34&
*/ y<6c*e1
public class CountBean { cv-rEHT
private String countType; Nw$OJ9$L>
int countId; Qrg- xu=
/** Creates a new instance of CountData */ M\a{2f7'n
public CountBean() {} iw3\`,5
public void setCountType(String countTypes){ =CJ`0yDQ>
this.countType=countTypes; }7(+#ISK6
} P.C?/7$7Z+
public void setCountId(int countIds){ |Z{#DOT
this.countId=countIds; ?d^6ynzn
} Nr~!5XO
public String getCountType(){ Wc2&3p9 c
return countType; @#OL{yMy
} 8=TC 3]
public int getCountId(){ HI 1T
return countId; /51$o\4S
} ]oVP_ &E
} D
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CountCache.java A,~KrRd
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/* boGdZ2$h4
* CountCache.java |1(x2x%}D^
* |+W{c`KL
* Created on 2007年1月1日, 下午5:01 -X!<$<\y;
* ;!A8A4~nu
* To change this template, choose Tools | Options and locate the template under Z@Zg3AVU
* the Source Creation and Management node. Right-click the template and choose q+9->D(6
* Open. You can then make changes to the template in the Source Editor. BVNJas
*/ v_EgY2l(
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package com.tot.count; ?'+]d;UO&
import java.util.*; cZ|*Zpk
/** RQ=$,
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* zKGZg>q
* @author )'T].kWW
*/ 7PMz6
public class CountCache { } &+]UGv
public static LinkedList list=new LinkedList(); V 97ORI
/** Creates a new instance of CountCache */ Mf#@8"l
public CountCache() {} [*p;+&+/ZM
public static void add(CountBean cb){ 2A;i
if(cb!=null){ jI7 x<=
list.add(cb); 'g)f5n a[
} :?\29j#*V
} iYgVSVNg
} l`zhKj
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CountControl.java JAd .\2%Y
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/* m(U.BXo
* CountThread.java tj~r>SRb+
* pNOE
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* Created on 2007年1月1日, 下午4:57 ~6n|GxR.[
* PiM(QR
* To change this template, choose Tools | Options and locate the template under i@nRZ$ K
* the Source Creation and Management node. Right-click the template and choose iKE&yO3
* Open. You can then make changes to the template in the Source Editor. Awxm[:r>^
*/ -Yse^(^"s
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package com.tot.count; iv_3R}IbX
import tot.db.DBUtils; "h_f-vP
import java.sql.*; f&4+-w.:V|
/** f}(4v1T
* @y7KP$t
* @author IC'+{3.m8
*/ Ft11?D
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public class CountControl{ d9:I.SA)E
private static long lastExecuteTime=0;//上次更新时间 dY&v(~&;]
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 #~nXAs]Q
/** Creates a new instance of CountThread */ jyW={%&
public CountControl() {} "$farDDoF
public synchronized void executeUpdate(){ hGY-d}npAJ
Connection conn=null; yZ,pH1
PreparedStatement ps=null; _ikKOU^8
try{ V'=;M[&