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: ^)a j,U[
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CountBean.java ~c*kS E2X
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/* Rv.IHSQUo
* CountData.java vV"I}L
* QcjsQTAbk
* Created on 2007年1月1日, 下午4:44 2av=W
* NiRb:F-
* To change this template, choose Tools | Options and locate the template under SEE:v+3|
* the Source Creation and Management node. Right-click the template and choose NW&2ca
* Open. You can then make changes to the template in the Source Editor. as!P`*@
*/ GXRW"4eF5
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package com.tot.count; (.5Ft^3W
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/** uWP0(6 %
* aNwx~t]G
* @author UXwI?2L
*/ [<d_#(]h'
public class CountBean { +G,_|C2J
private String countType; _@g\.7@0G
int countId; X0]$Ovq( l
/** Creates a new instance of CountData */ ]K%d
public CountBean() {} ,?+uQXfXR
public void setCountType(String countTypes){ +I}!)$/
this.countType=countTypes; 0sCWIGUW
} 8>xd
public void setCountId(int countIds){ Lg7dJnf
this.countId=countIds; p1T0FBV
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} %MCS_'N
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public String getCountType(){ voJJoy%
return countType; >\3N#S"PF
} j9-.bGtm?.
public int getCountId(){ BA8!NR|
return countId; =F5zU5`i
} Tr;&bX5]H
} 7;Vmbt9
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CountCache.java -<e_^
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/* =?N$0F!
* CountCache.java 6}Rb-\N
* h${=gSJc
* Created on 2007年1月1日, 下午5:01 _SH~.Mt_!
* 7h>,
* To change this template, choose Tools | Options and locate the template under [@]i_L[
* the Source Creation and Management node. Right-click the template and choose L=WKqRa>4
* Open. You can then make changes to the template in the Source Editor. >X5RRSo
*/ Kk|)N3AV:
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package com.tot.count; sLSH`Xy?5
import java.util.*; &'?Hh(
/** M'T[L%AP
* 5v sn'=yN
* @author 'aS: Azb
*/ V >~\~H2Y
public class CountCache { Zv9%}%7p
public static LinkedList list=new LinkedList(); e2pFX?
/** Creates a new instance of CountCache */ 2(P<TP._E
public CountCache() {} LKZv#b[h
public static void add(CountBean cb){ p}Bh
if(cb!=null){ Owv}lJ
list.add(cb); WHu[A/##']
} JIf.d($
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} ll?Qg%V[t
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CountControl.java x1"8K
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/* N Ff`V
* CountThread.java 0W~1v
* 6=*n$l#}
* Created on 2007年1月1日, 下午4:57 xhB-gG=
* _,f7D/dq
* To change this template, choose Tools | Options and locate the template under /03?(n= 3
* the Source Creation and Management node. Right-click the template and choose NL'(/|)
* Open. You can then make changes to the template in the Source Editor. {s=c!08=
*/ ^S(QvoaQ
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package com.tot.count; o@L
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import tot.db.DBUtils; (?i4P5s[!
import java.sql.*; }}oIZP\qM
/** K
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* (-@I'CFd
* @author KHM,lj*
*/ SPauno <M
public class CountControl{ q#"lnc<S
private static long lastExecuteTime=0;//上次更新时间 F'@9kdp
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 j@4]0o
/** Creates a new instance of CountThread */ S8C}C#
public CountControl() {}
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public synchronized void executeUpdate(){ o?I`n*u"X
Connection conn=null; 8:Dkf v
PreparedStatement ps=null; J?1Eh14KZ
try{ *|gl1S
conn = DBUtils.getConnection(); Fu[GQ6{f
conn.setAutoCommit(false); &