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: *sfD#Bi]
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CountBean.java q cA`)j
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/* Y
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* CountData.java Y&r]lD
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* Created on 2007年1月1日, 下午4:44 Cw,D{
* 3|@t%K
* To change this template, choose Tools | Options and locate the template under {- 63/z
* the Source Creation and Management node. Right-click the template and choose _2mNTJiw
* Open. You can then make changes to the template in the Source Editor. tllBCuAe
*/ I/COqU7~
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package com.tot.count; mf|pNiQ,
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/** TL)O-
* mg+k'Myo+
* @author ~HUZ#rUHm>
*/ 9 K
public class CountBean { K2/E#}/
private String countType; f!-Sz/ c#
int countId; 'CS.p!Z\
/** Creates a new instance of CountData */ NyI;v=
public CountBean() {} c! H 9yk
public void setCountType(String countTypes){ Dd2Lx&9
this.countType=countTypes; m<3v)R[>
} /k7wwZiY@
public void setCountId(int countIds){ 5y_"
this.countId=countIds; tnW;E\cR
}
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public String getCountType(){ ~j,TVY
return countType; C'9 1d7E
} +3bfD
public int getCountId(){ +~|AT+|iI
return countId; 1}`LTPW9
} RyRqH:p)3
} cvAtw Q'
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CountCache.java U?U(;nSR\A
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/* uJ'9R`E ]1
* CountCache.java 6|;0ax4:P
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* Created on 2007年1月1日, 下午5:01 6;uBZ&g
* 5FuK \y
* To change this template, choose Tools | Options and locate the template under ?'~;Q)
* the Source Creation and Management node. Right-click the template and choose ~Y/z=^
* Open. You can then make changes to the template in the Source Editor. o G_~3Kt
*/ .~dEUt/|)
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package com.tot.count; Z[,`"}}hv=
import java.util.*; 135Par5v
/** U
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* @author iAz UaF
*/ y=o=1(
public class CountCache { JY4_v>Aob
public static LinkedList list=new LinkedList(); PF ;YE6
/** Creates a new instance of CountCache */ =O^7TrM
public CountCache() {} R/N<0!HZ
public static void add(CountBean cb){ l:tpL(%
if(cb!=null){ ofEqvoi@
list.add(cb); *t=i
} '=%i,
} `QCD$=
} p6blD-v
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CountControl.java 2v|qLfe1
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/* Kpu<rKP`
* CountThread.java 4 ROWz
* (/q}mB
* Created on 2007年1月1日, 下午4:57 t+}uIp42<
* '{D%\w5{
* To change this template, choose Tools | Options and locate the template under Hz4uZ*7\|
* the Source Creation and Management node. Right-click the template and choose 5~yb
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* Open. You can then make changes to the template in the Source Editor. *Ypq q
*/ ~iT{8
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package com.tot.count; byj[u!{
import tot.db.DBUtils; z`9l<Q/
import java.sql.*; u@"o[e':
/** ty;o&w$
* u-/3(dKt
* @author xXa#J)'
*/ `]yKM0 Z
public class CountControl{ )9pBu
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private static long lastExecuteTime=0;//上次更新时间 s @M
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 kOM-
/** Creates a new instance of CountThread */ LI$L9eNv;Y
public CountControl() {} )O-sWh4
public synchronized void executeUpdate(){ F0: &>'}
Connection conn=null; bG1 ofsU
PreparedStatement ps=null; d:$G|<