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: "Q@ronP(~
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CountBean.java eg;~zv
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/* [+n*~
* CountData.java o ,AAC
* ,St#Vla
* Created on 2007年1月1日, 下午4:44 qNB<T('
* 7:plQ!7^
* To change this template, choose Tools | Options and locate the template under $P^q!H4D
* the Source Creation and Management node. Right-click the template and choose S2sQOM@
* Open. You can then make changes to the template in the Source Editor. N4F.Y"R$(
*/ chM%]|gey
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package com.tot.count; a|t$l=|DD
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/** .WA-&b_
* qr"3y
* @author x[~b2o
*/ Lt?lv2k=L
public class CountBean { gmw|H?]
private String countType; S&Zm0Ku
int countId; vlmB`T
/** Creates a new instance of CountData */ qouhuH_WtJ
public CountBean() {} Z'`<5A%;
public void setCountType(String countTypes){ 0l )~i''
this.countType=countTypes; jnO9j_CY
} 6F!+T=
public void setCountId(int countIds){ zy/@
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this.countId=countIds; a*lh)l<KV
} KX ,S
public String getCountType(){ ;=)k<6
return countType; wh$sn:J
} naG=Pq<
public int getCountId(){ ?+@n3]`0
return countId; yVU^M?`#
} ]!?;@$wx
} #A1%gIw<v2
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CountCache.java ]b2p G'
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/* @vC4[:"pD}
* CountCache.java w'Y7IlC
* Xv ]W(f1
* Created on 2007年1月1日, 下午5:01 FtP0krO(
* nv*FT
* To change this template, choose Tools | Options and locate the template under 5sj4;w[
* the Source Creation and Management node. Right-click the template and choose vyNxT* ,[K
* Open. You can then make changes to the template in the Source Editor. kbX8$xTM
*/ 4Tb
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package com.tot.count; 'f!8DGix
import java.util.*; Pr':51(
/** Q{s H3Y#l
* deBY5|
* @author q/4J.jL
*/ [M]
public class CountCache { =upeRY@u5
public static LinkedList list=new LinkedList(); u^@f&BIG]:
/** Creates a new instance of CountCache */ w1EXh
public CountCache() {} RIWxs Zt
public static void add(CountBean cb){ b[r8e
if(cb!=null){ 132{#tG]
list.add(cb); ZQ4p(6a
} v|XTr,#
} Ec3}_`
} |7'df &CA
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CountControl.java CM/H9Kz.
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/* 9&-dTayIz
* CountThread.java zqim R#u
* cvn@/qBq*t
* Created on 2007年1月1日, 下午4:57 B nFwlw
* 1{)5<!9! l
* To change this template, choose Tools | Options and locate the template under K[I=6
* the Source Creation and Management node. Right-click the template and choose d~9A+m3b_
* Open. You can then make changes to the template in the Source Editor. zGb|) A~,
*/ F+YZE[h%
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package com.tot.count; \j@OZ
import tot.db.DBUtils; 1!xQ=DU"
import java.sql.*; 6dq(T_eG
/** ne>pOK<vZ
* epA:v|S
* @author l5S aT,%
*/ 5Yg'BkEr
public class CountControl{ j$M h+5
private static long lastExecuteTime=0;//上次更新时间 q }i]'7
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 / C:Y94B-z
/** Creates a new instance of CountThread */ u
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public CountControl() {} wT6"U$cV
public synchronized void executeUpdate(){ pj\u9
L_
Connection conn=null; qzYwt]GNS
PreparedStatement ps=null;
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try{ ]FJjgu<