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: b`sph%&
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CountBean.java XD\Z$\UJE
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/* \M`fkR,,'
* CountData.java @3b|jJyf
* 1)m&6:!b
* Created on 2007年1月1日, 下午4:44 C\dlQQ
* OT5'c l
* To change this template, choose Tools | Options and locate the template under BV
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* the Source Creation and Management node. Right-click the template and choose 2nPU $\du
* Open. You can then make changes to the template in the Source Editor. &vp0zYd+v
*/ 3 eFBe2
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package com.tot.count; vXM``|
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/** L&nGjC+Lr
* 2=l!b/m
* @author oxPb; %
*/ W=~H_L?/
public class CountBean { 8W_X&X?Q
private String countType; +2ih!$T;7>
int countId;
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/** Creates a new instance of CountData */ /aB9pD+%
public CountBean() {} ~ Qt$)
public void setCountType(String countTypes){ ~:srm#IX
this.countType=countTypes; VgNt
} aJ Du_
public void setCountId(int countIds){ RFu]vFff
this.countId=countIds; c!%:f^7g
} o*u A+7n
public String getCountType(){ []M+(8Z_P
return countType; uv[e0,@
} G#4cWn'
public int getCountId(){ `&U ['_%
return countId; 7>m#Y'ppl@
} 9bT,=b;
} ngJES`0d
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CountCache.java rkl/5z??
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/* cZ7b$MZ%9
* CountCache.java EF{_-FXY
* -3r&O:
* Created on 2007年1月1日, 下午5:01 !lF|90=
* C6eo n4Ut
* To change this template, choose Tools | Options and locate the template under LV 94i
* the Source Creation and Management node. Right-click the template and choose :L FwJ
* Open. You can then make changes to the template in the Source Editor. |C S[>0mV!
*/ mlgdwM
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package com.tot.count; m-a_<xo
import java.util.*; ?^&!/,
/** ls6ywLP{
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* @author [zR
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*/ JCZJ\f*EZ
public class CountCache { f(?`PD[
public static LinkedList list=new LinkedList(); qD#-q vn
/** Creates a new instance of CountCache */ qhpq\[U6in
public CountCache() {} ?xX`_l
public static void add(CountBean cb){ ,9"</\]`
if(cb!=null){ ^ :Q |,oy
list.add(cb); '
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} h3xX26l
} 6SsZK)X
} t Q_}o[
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CountControl.java R< xxwjt
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/* +.HQ+`8z]
* CountThread.java 'eqvK|Uj:
* jt2m-*aP
* Created on 2007年1月1日, 下午4:57 Y@u{73H
* hv
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* To change this template, choose Tools | Options and locate the template under !HDk]
* the Source Creation and Management node. Right-click the template and choose =fi.*d?$7
* Open. You can then make changes to the template in the Source Editor. V|HSIJ#J
*/ ;wprHXjq
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package com.tot.count; qBX<{[
import tot.db.DBUtils; EGGy0 ly
import java.sql.*; L*h X_8J
/** 1xq1te)
* Ok({Al1A,w
* @author 60AX2-sdJ,
*/ ~rY<y%K
public class CountControl{ #>ci!4Gz=Z
private static long lastExecuteTime=0;//上次更新时间 7qXgHrr0|U
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 T:.J9
/** Creates a new instance of CountThread */ n3b@6V1_
public CountControl() {} cX.v^9kuX
public synchronized void executeUpdate(){ a/^YgrC\T
Connection conn=null; Punbw\9!d,
PreparedStatement ps=null; PD/JXExK
try{ 2 >xV&