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: xY]Y
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CountBean.java .wj?}Fr?97
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* CountData.java g\;&Z
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* Created on 2007年1月1日, 下午4:44 sFhmp
* HV_5
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* the Source Creation and Management node. Right-click the template and choose |$AoI
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package com.tot.count; 6x?3%0Km
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/** 6|h~pH
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* @author j5eX?bi_v
*/ nIWZo ~
public class CountBean { uH"W07
private String countType; ?+^vU5b1u
int countId; (g>8!Gl
/** Creates a new instance of CountData */ Y/|wOm;|
public CountBean() {} 3W<_J_[
public void setCountType(String countTypes){ vh29mzum
this.countType=countTypes; "2J$~2{N
} -chk\75
public void setCountId(int countIds){ 5(+9(
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this.countId=countIds; N^Bjw?3
} cV|u]ce%1
public String getCountType(){ mmf}6ABYT
return countType; G]NnGL<xk
} [*{G,=tF`Y
public int getCountId(){ ;XUiV$
return countId; -\2T(3P
} )j^~=Sio.
} >w}5\4j
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CountCache.java MeSF,*lP
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/* IL\2?(&Z
* CountCache.java ~%8T_R /3
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* Created on 2007年1月1日, 下午5:01 0j--X?-
* !qF U
* To change this template, choose Tools | Options and locate the template under >*v
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* the Source Creation and Management node. Right-click the template and choose i 1{Lx)
* Open. You can then make changes to the template in the Source Editor. 2D"n#O`y
*/ bu
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package com.tot.count; sX :)g>b
import java.util.*; FM80F_G^z
/** p,)~w1|
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* @author I 19 /
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public class CountCache { yqY nd<K4
public static LinkedList list=new LinkedList(); EGY'a*]cU
/** Creates a new instance of CountCache */ vZ
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public CountCache() {} p H5iv>H
public static void add(CountBean cb){ l$1z%|I
if(cb!=null){ 0c$0<2D%
list.add(cb); ib3u:
} J#```cB
} +# 38
} IQ5H`o?[B
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CountControl.java M<A jtDF%
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/* |>Q]q
* CountThread.java 'V*ixK8R0
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* Created on 2007年1月1日, 下午4:57 Ve]ufn6
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* the Source Creation and Management node. Right-click the template and choose CQ4MQ<BJ.
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package com.tot.count; g`2DJi&)
import tot.db.DBUtils; R#n!1~ (
import java.sql.*; l{2Y[&%
/** "-WEUz
* RTLA*
* @author "1-gMob
*/ "8NhrUX
public class CountControl{ qgk-[zW#
private static long lastExecuteTime=0;//上次更新时间 ~+HZQv3Y
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 b:c$EPK
/** Creates a new instance of CountThread */ U#X6KRZ~g
public CountControl() {} vhEXtjL
public synchronized void executeUpdate(){ Za>0&Fnf
Connection conn=null; z0v|%&IK