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: KBFAV&
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CountBean.java &hYjQ&n
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/* KhV;
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* CountData.java Pjff%r^
* 0IM#T=V
* Created on 2007年1月1日, 下午4:44 |"Oazll
* [0e]zyB+
* To change this template, choose Tools | Options and locate the template under ;nJCd1H
* the Source Creation and Management node. Right-click the template and choose SVo`p;2r
* Open. You can then make changes to the template in the Source Editor. , 0rC_)&B
*/ :+,qvu!M7
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package com.tot.count; $mOK|=tI_
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/** {:enoV"
* 6A/|XwfE/v
* @author K~WwV8c9;
*/ Ja#idF[V
public class CountBean { Z
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private String countType; n{Mj<\kL
int countId; (Qq$ql27
/** Creates a new instance of CountData */ c(AjM9s
public CountBean() {} &4DV]9+g
public void setCountType(String countTypes){ h OboM3_
this.countType=countTypes; qwaw\vOA
} 4p~:(U[q
public void setCountId(int countIds){ (<.1o_Q-LU
this.countId=countIds; +T^m
} WiviH#hF
public String getCountType(){ I>-jKSkwc
return countType; tZXtt=M w
} MOmp{@
public int getCountId(){ a Ts_5q
return countId; ^HL#)fK2I
} XfsCu>
} X>|.BvY|
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CountCache.java D_9/|:N:
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/* g}qK$>EPS
* CountCache.java }u+R,@l/
* d*>M<6b-
* Created on 2007年1月1日, 下午5:01 9au)K!hN
* r$\g6m
* To change this template, choose Tools | Options and locate the template under Hab9~v ]
* the Source Creation and Management node. Right-click the template and choose y~S[0]y>
* Open. You can then make changes to the template in the Source Editor. !P92e1
*/ f(n{7
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package com.tot.count; a*IJ)'S
import java.util.*; WD?V1:>+
/** >PGm} s_
* Iwn@%?7
* @author 4GHIRH
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*/ In;z\"NN4
public class CountCache { "?9fL#8f*!
public static LinkedList list=new LinkedList(); P|(J]/
/** Creates a new instance of CountCache */ wA~Nfn
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public CountCache() {} -owfuS?i=
public static void add(CountBean cb){ 7e=a D~f
if(cb!=null){ 2.lnT{
list.add(cb); Iw<c 9w8
} mmKrmM*1
} +`4}bc,G
} z~Pmh%b
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CountControl.java p.}[!!m P
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/* D&^:hs@
* CountThread.java O#U"c5%
* %8{_;-f
* Created on 2007年1月1日, 下午4:57 C1do]1VH
* }mGD`5[`
* To change this template, choose Tools | Options and locate the template under y-X'eCUz
* the Source Creation and Management node. Right-click the template and choose z$V8<&q
* Open. You can then make changes to the template in the Source Editor. &Egn`QU
*/ k2WO*xa*
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package com.tot.count; QO>*3,(H,q
import tot.db.DBUtils; [;2:lbPx
import java.sql.*; KN`z68c4L
/** @/u`7FO$&
* xq)/ QR
* @author .#eXNyCe
*/ 0X-2).nu
public class CountControl{ Rp|&1nS
private static long lastExecuteTime=0;//上次更新时间 8WGM%n#q
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 Y_B 4s-
/** Creates a new instance of CountThread */ @~XlI1g$i
public CountControl() {} >y~_Hh(TSL
public synchronized void executeUpdate(){ Iz8^?>X
Connection conn=null; 7EO&:b