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: ncJFB,4
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CountBean.java cv*Q]F1%
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/* '0_j{ig
* CountData.java -Mi}yi
* Op/79]$
* Created on 2007年1月1日, 下午4:44 2~&hstd%
* /q"d`!h)w
* To change this template, choose Tools | Options and locate the template under sE%<"h\_0
* the Source Creation and Management node. Right-click the template and choose }L$Xb2^l
* Open. You can then make changes to the template in the Source Editor. 0fPHh>u
*/ `f6)Q`n
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package com.tot.count; Ueg N-n
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/** kBiBXRt
* l'7Mw%6{
* @author *L;pc g8{
*/ Q%n{*py
public class CountBean { +r-dr>&H@
private String countType;
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int countId; MB8SB
/** Creates a new instance of CountData */ #NN"(I
public CountBean() {} G V:$;
public void setCountType(String countTypes){ EAD0<I<>
this.countType=countTypes; u3*NO
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} $vTAF-~Ql
public void setCountId(int countIds){ $\,BpZ
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this.countId=countIds; W`Q$t56
} b$goF
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public String getCountType(){
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return countType; 'Uko^R)(
} zD)IU_GWa
public int getCountId(){ 2B9i R
return countId; o4/I1Mq
} z
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} 2 ]V>J
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CountCache.java xMNNXPz(
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/* A{aw<
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* CountCache.java (aJP: ^
* :>P4L,Da]
* Created on 2007年1月1日, 下午5:01 8Q^6ibE
* *,W!FxJ
* To change this template, choose Tools | Options and locate the template under c/<Sa|'
* the Source Creation and Management node. Right-click the template and choose $"sq4@N
* Open. You can then make changes to the template in the Source Editor. g=FDm*
*/ 5?5-;H
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package com.tot.count; .0
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import java.util.*; b46[fa
/** hgweNRTh!
* .# 6n
* @author \K?(
*/ cPq Dsl3
public class CountCache { X-)RU?
public static LinkedList list=new LinkedList(); fO^e+Mz
/** Creates a new instance of CountCache */ cBLR#Yu;O5
public CountCache() {} AXl!cgi
public static void add(CountBean cb){ ([,vX"4
if(cb!=null){ {Ax)[<i
list.add(cb); ^)f{q)to
} ;-KAUgL2
} >d8x<|D
} b^[W_y
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CountControl.java %RQ C9!
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/* eVw\v#gd
* CountThread.java [j)\v^m
* .M9d*qp`S
* Created on 2007年1月1日, 下午4:57 +Lm3vj_N
* j+DE|Q&]I
* To change this template, choose Tools | Options and locate the template under 3h9Sz8
* the Source Creation and Management node. Right-click the template and choose ORGv)>C|
* Open. You can then make changes to the template in the Source Editor. bQ-Gp;]
*/ E`Jp(gK9F
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package com.tot.count; { OB-J\7Y
import tot.db.DBUtils; +}_Pf{MW
import java.sql.*; J [ YtA
/** |SGgy|/a#
* (Wd_G-da
* @author <<
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*/ :+~KPn>w5
public class CountControl{ _ PXG AS
private static long lastExecuteTime=0;//上次更新时间 q>_vE{UB
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 =n@F$/h
/** Creates a new instance of CountThread */ aO8ch
public CountControl() {} ]y3pE}R
public synchronized void executeUpdate(){ p91`<>Iw
Connection conn=null; M{`/f@z(
PreparedStatement ps=null; :s'o~
try{ -O|&