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: jg=}l1M"
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CountBean.java @i@f@.t
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/* hE}y/A[
* CountData.java 9I*`~il>{
* `'/1Ij+
* Created on 2007年1月1日, 下午4:44 P<IZ%eS3B
* 5t[7taLX\
* To change this template, choose Tools | Options and locate the template under ^
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* the Source Creation and Management node. Right-click the template and choose 0tP{K
* Open. You can then make changes to the template in the Source Editor. H@ .1cO
*/ <|4L+?_(&
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package com.tot.count; ZTK)N
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/** ]Kp -2KW
* 8jfEvwY
* @author #i[V{J8.p
*/ 7>yb8/J
public class CountBean { cW\Y1=Gv|
private String countType; &%` 0&y
int countId; M0"}>`1lJ
/** Creates a new instance of CountData */ SI/p8 ^
public CountBean() {} T+)#Du
public void setCountType(String countTypes){ aUEnQ%YU"
this.countType=countTypes; NC{8[*Kx5
} qwHP8GU
public void setCountId(int countIds){ SSa0x9T
this.countId=countIds; #%SF2PB;
} pDG>9P#mO
public String getCountType(){ t[b@P<F
return countType; {DbWk>[DkG
} iGsD!2
public int getCountId(){ h
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return countId; |FJc'&) J"
} !jyy`q=
} YfU6mQ
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CountCache.java F48W8'un
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/* -v62 s
* CountCache.java '7>Yrzq
* 55vI^SSA
* Created on 2007年1月1日, 下午5:01 hC...tk
* +{"w5o<CO
* To change this template, choose Tools | Options and locate the template under ]`_eaW?Ua
* the Source Creation and Management node. Right-click the template and choose RWINdJZ
* Open. You can then make changes to the template in the Source Editor. 3d*wZ9qz
*/ :N
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package com.tot.count; wTPHc:2
import java.util.*; F)hUT@
/** 8Hh=Sp^
* `NARJ9M
* @author =1Tn~)^O
*/ wb/@g=`d
public class CountCache { eAbp5}B
public static LinkedList list=new LinkedList(); m15> ^i^W
/** Creates a new instance of CountCache */ wGAeOD
public CountCache() {} +pJ~<ug]
public static void add(CountBean cb){ q
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if(cb!=null){ qq[Enf|/y
list.add(cb); Ai.^~#%X
} R#Hz%/:|A
} TWTh!
} glgXSOj
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CountControl.java XT~]pOE;D
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/* 299uZz}Y
* CountThread.java %n:ymc
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* pl5Q2zq%
* Created on 2007年1月1日, 下午4:57 @rt}z+JF
* ]{PJ
* To change this template, choose Tools | Options and locate the template under UWg+7RL
* the Source Creation and Management node. Right-click the template and choose l. 0|>gj`0
* Open. You can then make changes to the template in the Source Editor. x]<0Kq9K
*/ 6eHw\$/
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package com.tot.count; I=}pT50~9
import tot.db.DBUtils;
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import java.sql.*; 8PwPI%Pb
/** 2)47$eu
* C &-]RffA
* @author Cy'! >
*/ Ur2)];WZ
public class CountControl{ 3IDX3cM9
private static long lastExecuteTime=0;//上次更新时间 1n )&%r
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 9Ts r g
/** Creates a new instance of CountThread */ LXx`Vk>ky
public CountControl() {} -x2&IJ!
public synchronized void executeUpdate(){ ]8ob`F`m,
Connection conn=null; vC ISd
PreparedStatement ps=null; uT2w2A;
try{ `Uy'YfYF
conn = DBUtils.getConnection(); OIdoe0JR:O
conn.setAutoCommit(false); /F7X"_(H
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); +U*:WKdI?
for(int i=0;i<CountCache.list.size();i++){ fD ?w!7f-1
CountBean cb=(CountBean)CountCache.list.getFirst(); D}A>`6W<