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: <L11s%5-
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CountBean.java sa _J6~
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/* AAW] Y#UwW
* CountData.java lrwQ
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* ]~VuY:abH
* Created on 2007年1月1日, 下午4:44 -QR]BD%J*[
* @GGQ13Cj(
* To change this template, choose Tools | Options and locate the template under `IJ)'$pn
* the Source Creation and Management node. Right-click the template and choose /OB) \{-
* Open. You can then make changes to the template in the Source Editor. )db:jPkwd
*/ a(*"r:/lD
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package com.tot.count; ?.uhp
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/** ixK9/5T
* 08{^Ksg
* @author -;ra(L`
*/ r}sO},i
public class CountBean { c0HPS9N\
private String countType; tC oE4Ed
int countId; p&u\gSo
/** Creates a new instance of CountData */ |(TEG.<g
public CountBean() {} Y2'HP)tfIw
public void setCountType(String countTypes){ rBU)@I pDG
this.countType=countTypes; .qKfhHJ
} @o*~\E<T
public void setCountId(int countIds){ M(:bM1AD`u
this.countId=countIds; :SW
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} CB,2BTtRE
public String getCountType(){ TQ:e!
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return countType; KaS*LDzw
} PC+Soh*
public int getCountId(){ =S6bP<q
return countId; 0UW_ Pbh6
} .w _BA)
} [u=yl0f
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CountCache.java GVu[X?q@|
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/* s-(c-E09
* CountCache.java GUD]sXSj
* W8u&5#$I
* Created on 2007年1月1日, 下午5:01 ?b'(39fj
* `8#xO{B1
* To change this template, choose Tools | Options and locate the template under 5Ma."?rW
* the Source Creation and Management node. Right-click the template and choose o0F,!}
* Open. You can then make changes to the template in the Source Editor. [`s.fkb8
*/ Z__fwv.X[
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package com.tot.count; RRYcg{g
import java.util.*; ut]UU*g^$
/** N!ay#V
* ,UC|[-J
* @author m\CU,9;;(
*/ 6R8>w,
public class CountCache { :;hX$Qz
public static LinkedList list=new LinkedList(); 1Z;cb0:
/** Creates a new instance of CountCache */ =sv?))b`
public CountCache() {} Nu3IYS5&
public static void add(CountBean cb){ T-GvPl9ZJw
if(cb!=null){ cTn(Tv9s
list.add(cb); VAjl?\}6
} .@EzHe ^W
} 8.^`~ta
} N?#L{Yt
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CountControl.java t2.jg?`k
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/* mA%}ijR6y
* CountThread.java ,'t&L]
* F
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* Created on 2007年1月1日, 下午4:57 (fr=[m$`
* -^t.eZ*|
* To change this template, choose Tools | Options and locate the template under d2US~.;>l
* the Source Creation and Management node. Right-click the template and choose ^jdtp
* Open. You can then make changes to the template in the Source Editor. \*BRFUAc
*/ I(3~BOUn_
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package com.tot.count; Pg`+Q^^6S
import tot.db.DBUtils; UY,u-E"
import java.sql.*; bA$ElKT
/** 23K#9!3
* fhRu-
* @author (E 8jkc
*/ Q%!xw(
public class CountControl{ 7<(U`9W/q
private static long lastExecuteTime=0;//上次更新时间 hH-!3S2'
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 H8B.c%_|U
/** Creates a new instance of CountThread */ p[%~d$JUq
public CountControl() {} dD'KP4Io@
public synchronized void executeUpdate(){ n ~ &ssFC
Connection conn=null; wv\"(e7(
PreparedStatement ps=null; qK@,O\
try{ y?3u6q++
conn = DBUtils.getConnection(); OVgak>$
conn.setAutoCommit(false); EG &