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: Bnh*;J0
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CountBean.java &2,^CG
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/* -$ha@bCWO
* CountData.java QR{>]I
* ,| ~Pa
* Created on 2007年1月1日, 下午4:44 :YM1p&|fS
* cg_j.=M-
* To change this template, choose Tools | Options and locate the template under m
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* the Source Creation and Management node. Right-click the template and choose (Z?g^kjq)
* Open. You can then make changes to the template in the Source Editor. Dgm"1+
*/ (gjCm0#_%
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package com.tot.count; uy8mhB+]
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/** '.IR|~ Y
* ASULg{
* @author y@9ifFr
*/ 1!&m1
public class CountBean { Nc:0opPM
private String countType; n |Q'>
int countId; $\q}A:
/** Creates a new instance of CountData */ )Ag{S[yZ
public CountBean() {} 5~{s-Ms
public void setCountType(String countTypes){ _NN5e|t
this.countType=countTypes; F~wqt7*
} Pv3qN{265
public void setCountId(int countIds){ $aDkZj
this.countId=countIds; y4Lh:;
} tG*HUN?*
public String getCountType(){ bj7r"_
return countType; ~=gpn|@b
} g96]>]A<{
public int getCountId(){ Ug8>|wCE
return countId; <Y+>a#T
} ~qkn1N%'
} /dwj:g0y
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CountCache.java H&uh$y@
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/* lX/:e=
* CountCache.java wG
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* Y{ OnW98
* Created on 2007年1月1日, 下午5:01 Tzr'3m_
* :&BE-f
* To change this template, choose Tools | Options and locate the template under lD6PKZ\RIj
* the Source Creation and Management node. Right-click the template and choose mO&zE;/[
* Open. You can then make changes to the template in the Source Editor. n7pjj
*/ C~R,,
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package com.tot.count; HleMzykF
import java.util.*; Ti&v9re%wO
/** S3gd'Bahq
* _bSn YhS
* @author jS4fANG
*/ WP >VQZ&
public class CountCache { t(Gg
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public static LinkedList list=new LinkedList(); vQmqYyOc2
/** Creates a new instance of CountCache */ $Go)Zs-bL?
public CountCache() {} Ti$_V_
public static void add(CountBean cb){ XvI Y=~
if(cb!=null){ Zb$P`~(%
list.add(cb); Qq3UC%Z1
} I\@`AU
} S3ZIC\2
} ASUleOI79(
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CountControl.java >r.W \
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/* 0X4I-xx#
* CountThread.java \-CL}Z}S
* .x][ _I>
* Created on 2007年1月1日, 下午4:57 l09DH+
* i/RA/q
* To change this template, choose Tools | Options and locate the template under Xp0S
* the Source Creation and Management node. Right-click the template and choose 6-QcHJ>m6U
* Open. You can then make changes to the template in the Source Editor. );d"gv(]D
*/ 4rUOk"li
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package com.tot.count; Y7<(_p7
import tot.db.DBUtils; #sM*<2vj
import java.sql.*; DhN<e7c`
/** ,tak{["
* y\ax?(z
* @author 4DsHUc6
*/ LN`Y`G|op
public class CountControl{ /ommM
private static long lastExecuteTime=0;//上次更新时间 9](RZ6A+o
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 R})b%y`]
/** Creates a new instance of CountThread */ 3o`c`;H%p
public CountControl() {} jbp?6GW
public synchronized void executeUpdate(){ nJY3 1(p
Connection conn=null; l`."rei%)
PreparedStatement ps=null; ;@H:+R+(
try{ c{[ lT2yxU
conn = DBUtils.getConnection(); 75eZhs[b
conn.setAutoCommit(false); F<