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: %+j/nA1%S
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CountBean.java n8;L_43U
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/* +yfUB8Xw
* CountData.java UG`~RO
* *'8q?R?7g
* Created on 2007年1月1日, 下午4:44 dNt^lx
* vkGF_aenk
* To change this template, choose Tools | Options and locate the template under |wuTw|
* the Source Creation and Management node. Right-click the template and choose A)n_ST0
* Open. You can then make changes to the template in the Source Editor. k0V]<#h87
*/ r7R'beiH
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package com.tot.count; =h-EN_[
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/** /FXvrH(
* F6yFKNK!n
* @author pIK:$eN!/
*/ ?o+%ckH
public class CountBean { _4Eq_w`
private String countType; COHBjufmR
int countId; tUULpx.h
/** Creates a new instance of CountData */ hizM}d-"C
public CountBean() {} de W1>yh^_
public void setCountType(String countTypes){ Bcv{Y\x;ko
this.countType=countTypes; RA<ky*^dr
} WIi,`/K+
public void setCountId(int countIds){ EL3X8H
this.countId=countIds; `(?c4oq,c>
} v4|TQ8!wR
public String getCountType(){ m\jjj^f a
return countType; *> nOL
} v^o`+~i
public int getCountId(){ p#P<V%
return countId; QjSWl,{
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} P<&bAsje
} FNLS=4
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CountCache.java yD& Y`f#
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/* DQW)^j
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* CountCache.java L{jx'[C
* wMCg`rk
* Created on 2007年1月1日, 下午5:01 &\6},JN
* aeN #<M&$<
* To change this template, choose Tools | Options and locate the template under L)U*dY
* the Source Creation and Management node. Right-click the template and choose P/ 6$TgQ
* Open. You can then make changes to the template in the Source Editor. k6(</uRj
*/ hL/u5h%$
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package com.tot.count; UJqh~s
import java.util.*; IowXVdm@6
/** 084Us
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* T<Xw[PEnP
* @author u4
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*/ 1\@PrO35J
public class CountCache { qZ[HILh!
public static LinkedList list=new LinkedList(); fTR6]i;
/** Creates a new instance of CountCache */ 6:%lxG
public CountCache() {} "TaLvworb4
public static void add(CountBean cb){ *8,W$pe3
if(cb!=null){ l9|K,YVW
list.add(cb); ,|yscp8
} T\p>wiY2|F
} )_C>hWvo_
} /hqn>t
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CountControl.java o S%(~])\
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/* gd#R7[AVi
* CountThread.java p({@t=L3g
* GO2q"a
* Created on 2007年1月1日, 下午4:57 #Swc>jYc
* -7w}+iS
* To change this template, choose Tools | Options and locate the template under Hl%Og$q3
* the Source Creation and Management node. Right-click the template and choose fh)eL<I
* Open. You can then make changes to the template in the Source Editor. E-Xz
*/ iB
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package com.tot.count; m_Ed[h/I
import tot.db.DBUtils; tik*[1it
import java.sql.*; &D[M<7T
/** 3YLfh`6
* \i,H1a
* @author GFPrK9T
*/ \H>T[
public class CountControl{ ,_(=w.F
private static long lastExecuteTime=0;//上次更新时间 +Eb-|dM
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 *LBF+L^C%
/** Creates a new instance of CountThread */ nkPlfH
public CountControl() {} "4WnDd5"
public synchronized void executeUpdate(){ +pT;;
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Connection conn=null; JXkx!X_{
PreparedStatement ps=null; vjGJRk|XED
try{ <