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: `A#r6+
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CountBean.java JMoWA0f
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/* ifuVV Fov
* CountData.java K2&pTA~OR
* ^NP" m
* Created on 2007年1月1日, 下午4:44 ^Xh9:OBF
* hd\iW7
* To change this template, choose Tools | Options and locate the template under \i{=%[c
* the Source Creation and Management node. Right-click the template and choose {W@Y4Qqq
* Open. You can then make changes to the template in the Source Editor. *NDzU%X8
*/ ^58'*13ZL
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package com.tot.count; )5hS;u&b
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/** QQqWJq~
* n*U1
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* @author Jyvc(~x
*/ y>|7'M*+
public class CountBean { ZYg="q0x&
private String countType;
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int countId; Ry,jPw5<
/** Creates a new instance of CountData */ UeE&rA]
public CountBean() {} `6UW?1_Z5
public void setCountType(String countTypes){ 9hcZbM]
this.countType=countTypes; uRJLSt9m
} F`f#gpQ
public void setCountId(int countIds){ R7+k=DI
this.countId=countIds; !
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} 2uz<n}IV
public String getCountType(){ yt$V<8a
return countType; UA}k"uM
} R(3V !ph
public int getCountId(){ K5b8lc
return countId; X=-pNwO
} jh9^5"vQ
} "{|9Yis=
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CountCache.java C%l~qf1n
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/* }*;Hhbox
* CountCache.java b bX2D/
* EY':m_7W
* Created on 2007年1月1日, 下午5:01 6MF%$K3
* a(!:a+9WOP
* To change this template, choose Tools | Options and locate the template under A:>G: X5t
* the Source Creation and Management node. Right-click the template and choose amOBUD5Ld`
* Open. You can then make changes to the template in the Source Editor. SI U"cO4
*/ (m})V0/`
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package com.tot.count; zkB_$=sbn#
import java.util.*; R:zjEhH)
/** 8z\WyDz
* tPc '#.
* @author q
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*/ ,Epg&)wC]
public class CountCache { mq>Ag
public static LinkedList list=new LinkedList(); "@DCQ
/** Creates a new instance of CountCache */ W.{#Pg1Da
public CountCache() {} HX?5O$<<N
public static void add(CountBean cb){ EPW
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if(cb!=null){ ,:j^EDCsaJ
list.add(cb); oljl&tuQy
} + ,0RrD )
} }fUV*U:3
} 7'd_]e-.
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CountControl.java IYb@@Jzo
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/* Ggsfr;m\`
* CountThread.java qK#\k@E
* R2-OT5Ej
* Created on 2007年1月1日, 下午4:57 yD$rls:v<
* "3W!p+W
* To change this template, choose Tools | Options and locate the template under P8piXG
* the Source Creation and Management node. Right-click the template and choose PKty'}KF
* Open. You can then make changes to the template in the Source Editor. ^7V9\Q9
*/ VWaI!bK
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package com.tot.count; Kmk<
import tot.db.DBUtils; XQ.JzzY$
import java.sql.*; (F
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/** %
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* Hi|'
* @author \@3i=!
*/ +kmPQdO;*/
public class CountControl{ +UB+. 5P
private static long lastExecuteTime=0;//上次更新时间 +(QGlRd
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 x=gZ7$?A
/** Creates a new instance of CountThread */ A7 E*w
public CountControl() {} P10`X&
public synchronized void executeUpdate(){ !zVuO*+
Connection conn=null; JIQS'r
PreparedStatement ps=null; Y6 ,< j|
try{ T1LtO O
conn = DBUtils.getConnection(); n(0O'nS^
conn.setAutoCommit(false); QB7E:g&