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:
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CountBean.java L]I ;{Y
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/* FJJ+*3(
* CountData.java F,}wQN
* \nT, NV11
* Created on 2007年1月1日, 下午4:44 k/bY>FY2r
* @)=\q`vV
* To change this template, choose Tools | Options and locate the template under !\w@b`Iv8
* the Source Creation and Management node. Right-click the template and choose I?c "\Fe
* Open. You can then make changes to the template in the Source Editor. kSj,Pl\NC
*/ '&?cW#J?
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package com.tot.count; A (z
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/** uj#bK
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* 5%M 'ewu
* @author l%XuYYQ
*/ AX=$r]_
public class CountBean { 5#kN<S!
private String countType; *9.4AW~]X
int countId; /NRdBN
/** Creates a new instance of CountData */ L-Qc[L
public CountBean() {} K. [2uhB)
public void setCountType(String countTypes){ ?/"Fwjau
this.countType=countTypes; _Bh-*e2k
} _"Yi>.{]
public void setCountId(int countIds){ bV c"'RQ
this.countId=countIds; &L6xagR7M
} d$.t0-lC
public String getCountType(){ !9w3/Gthj
return countType; 8+'9K%'@qX
} ^W!w~g+
public int getCountId(){ Hw[(v[v
return countId; 1N8gH&oF
} rC
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} /4x3dwXW@
}!-BZIOlO
CountCache.java AA$+ayzx9{
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/* Z,~Bz@5`"
* CountCache.java T^FeahA7;
* J*HZ=6L
* Created on 2007年1月1日, 下午5:01 JAPiR=
* XL!\Lx
* To change this template, choose Tools | Options and locate the template under nO-1^HUl
* the Source Creation and Management node. Right-click the template and choose $&IF#uDf
* Open. You can then make changes to the template in the Source Editor. e$!01Y$HI
*/ *^ag wQ`
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package com.tot.count; @~WSWlQW
import java.util.*; {[B^~Y>Lr
/** m"3gTqG
* D}4*Il?
* @author d@-s_gw
*/ xF|P6GXg
public class CountCache { up`.#GWm
public static LinkedList list=new LinkedList();
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/** Creates a new instance of CountCache */ jm~(OLg
public CountCache() {} dC&{zNG
public static void add(CountBean cb){ -<e8\ Z`
if(cb!=null){ TNgf96)
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list.add(cb); "h.-qQGU%
} |Uf[x[
} ZWJ%t'kF
} 4-ijuqjN
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CountControl.java }~/u%vI@M5
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/* (H=7 (
* CountThread.java 4n1-@qTPF~
* 4q%hn3\
* Created on 2007年1月1日, 下午4:57 o0SQJ1.a$
* ^uZ!e+
* To change this template, choose Tools | Options and locate the template under "`A@_;At`
* the Source Creation and Management node. Right-click the template and choose .4I"[$?Q
* Open. You can then make changes to the template in the Source Editor. *hugQh]a
*/ *c"tW8uR
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package com.tot.count; snU
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import tot.db.DBUtils; `bXP
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import java.sql.*; ,UOAGu<_gb
/** c:;m BS>~
* vpTYfE
* @author 4(2iR0N
*/ 'dT JE--@
public class CountControl{ "XvM1G&s`
private static long lastExecuteTime=0;//上次更新时间 K8>-%ns
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 fK-tvP0}*
/** Creates a new instance of CountThread */ /%O+]#$`0
public CountControl() {} ^uG^XY&ItC
public synchronized void executeUpdate(){ BgPwIK
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Connection conn=null; 1rhEk|pGZ
PreparedStatement ps=null; 'VH%cz*
try{ |q0MM^%"
conn = DBUtils.getConnection(); [):&R1