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: @?3u|m |Z
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CountBean.java *@dRL3c^=
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/* hqFK2
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* CountData.java G|'DAj%
* '+Gt+Gq+
* Created on 2007年1月1日, 下午4:44 '- 4);:(^
* N3MMxm_u
* To change this template, choose Tools | Options and locate the template under O%tlj@?
* the Source Creation and Management node. Right-click the template and choose ZBdZr
* Open. You can then make changes to the template in the Source Editor. $9+}$lpPd
*/ IcoK22/
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package com.tot.count; TWQf2
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/** _wCp.[3?t
* ub{<m^|)
* @author e~W35Y>A
*/ D+LeZBJ
public class CountBean { yps7MM-r
private String countType; ,@khV
int countId; ]3NH[&+
/** Creates a new instance of CountData */ `U#*O+S-^
public CountBean() {} PGP9-M
public void setCountType(String countTypes){ "T<Q#^m
this.countType=countTypes; | 5Mhrb4.
} 3:YZC9
public void setCountId(int countIds){ R6h(mPYA
this.countId=countIds; 8PDt 7
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} O!hg@[\B+
public String getCountType(){ p` B48TW
return countType; >9Fs)R]P
} |UZ#2
public int getCountId(){ ]B:g<}5$4
return countId; xQ* U9Wt;T
} )T(xQ2&r4
} Jv1.Yz
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CountCache.java YCj"^RC^
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/* >+7+ gSD#:
* CountCache.java d@b"tb}R
* 4G;+ETp
* Created on 2007年1月1日, 下午5:01 f%an<>j^w
* G=jdb@V/?
* To change this template, choose Tools | Options and locate the template under y)"aQJ>
* the Source Creation and Management node. Right-click the template and choose Qa5<go{
* Open. You can then make changes to the template in the Source Editor. 9 @!Og(l
*/ LU?X|{z
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package com.tot.count; ]V6<h Psi
import java.util.*; =mn)].Wg
/** @8HTC|_vX
* 5MQD:K2
* @author !\}Dxt
*/ U!XC-RA3
_
public class CountCache { SWz+.W{KQ"
public static LinkedList list=new LinkedList(); e/r41
/** Creates a new instance of CountCache */ UkG|5P`
public CountCache() {} bVQLj}%
public static void add(CountBean cb){ q+19EJ(
if(cb!=null){ [~W"$sT
list.add(cb); #@;RJJZg
} {<\nl#}5S
} 5H6m{ng
} 0F1 a
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CountControl.java `a["`N^
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/* )xiic3F
* CountThread.java zQ(li9
* AZ(["kh[
* Created on 2007年1月1日, 下午4:57 |<\o%89AM
* aG%KiJ7KEN
* To change this template, choose Tools | Options and locate the template under qy`@\)S/5
* the Source Creation and Management node. Right-click the template and choose ^W eE%"
* Open. You can then make changes to the template in the Source Editor. al F*L
*/ f+}?$'
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package com.tot.count; $LRvPan`
import tot.db.DBUtils; s_hf,QH
import java.sql.*; 0F8y8s
/** }W#Gf.$6C
* kUUN2
* @author D(Pd?iQIO
*/ MG*#-<OV.
public class CountControl{ ^+F@KXnL
private static long lastExecuteTime=0;//上次更新时间 we4e>)
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 8Focs p2
/** Creates a new instance of CountThread */ X-|`|>3E
public CountControl() {} )TP1i
public synchronized void executeUpdate(){ -;a}'1HOE
Connection conn=null; [<