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: Y,}43a0A
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CountBean.java CGl+!t{
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/* 3edK$B51;
* CountData.java Vzm7xl [
* ZaindX{.1
* Created on 2007年1月1日, 下午4:44 6.=1k
* vGp@YABM
* To change this template, choose Tools | Options and locate the template under ~x|Sv4M
* the Source Creation and Management node. Right-click the template and choose c2:kZxT
* Open. You can then make changes to the template in the Source Editor. _tJURk%
*/ *X5LyO3-gP
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package com.tot.count; A~SSu.L@
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/** c4W"CD;D
* vAxtNRS
* @author aKr4E3`
*/ [c )\?MWW
public class CountBean { m]pvJJ@
private String countType; <QLj6#d7Y
int countId; )@M|YM1+
/** Creates a new instance of CountData */ *9^k^h(r&4
public CountBean() {} ,1h(k<-
public void setCountType(String countTypes){ c{ (%+
this.countType=countTypes; rn*VL(Yd(
} <WkLwP3^
public void setCountId(int countIds){ 4yy
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this.countId=countIds; :\We =oX
} rVmO/Y#Hx$
public String getCountType(){ ]HT>-Ba;{h
return countType; .gg0:
} KO$8lMm$
public int getCountId(){ @cNI|T
return countId; #2,L)E\G8e
} ;yrcH+I$_
} ]^%3Y
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CountCache.java X~!?t}
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/* |8ZAE%/d
* CountCache.java ?"Q6;np*
* lph_cY3p
* Created on 2007年1月1日, 下午5:01 P~>nlm82]
* wO
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* To change this template, choose Tools | Options and locate the template under l]cQ7g5
* the Source Creation and Management node. Right-click the template and choose y+h=x4t
* Open. You can then make changes to the template in the Source Editor. [-a/]
*/ l).Ijl}AH;
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package com.tot.count; oWOZ0]H1
import java.util.*; Zwl?*t\D
/** Os+=}
* yB[LO(i
* @author AP@d2{"m}
*/ ]"_'o~
public class CountCache { |V]E8Qt
public static LinkedList list=new LinkedList(); e@YR/I8my
/** Creates a new instance of CountCache */ dq&d>f1
public CountCache() {} GrIdQi^8
public static void add(CountBean cb){ _:
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if(cb!=null){ e&nw&9vo
list.add(cb); L}nc'smvM
} 9rz "@LM
} r&;AG@N/
} hw2Hn
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CountControl.java B[h9epU]K
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/* y0^FTSQ|
* CountThread.java ~46ed3eGzi
* Atw^C+"vW&
* Created on 2007年1月1日, 下午4:57 k5M(Ve
* "m5ZZG#R`
* To change this template, choose Tools | Options and locate the template under v-qS 'N4
* the Source Creation and Management node. Right-click the template and choose Joj8'
* Open. You can then make changes to the template in the Source Editor. *z~Y *Q0
*/ p6*D^-
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package com.tot.count; >[U$n.
import tot.db.DBUtils; Oylw,*%
import java.sql.*; %yVZ|d*Q
/** I+SL0
* ;2}Gqh )Yr
* @author iV=#'yY
*/ L3\{{QOA
public class CountControl{ "G:>}cs%?
private static long lastExecuteTime=0;//上次更新时间 AS;{{^mM(
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 x&wUPo{
/** Creates a new instance of CountThread */ d=XhOC$
public CountControl() {} |@nXlZE
public synchronized void executeUpdate(){ #.RI9B
Connection conn=null; AF}HS8eYy
PreparedStatement ps=null; k:.c(_2M
try{
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conn = DBUtils.getConnection(); ~ln,Cm} 4
conn.setAutoCommit(false); ebchHnOd
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); ]]4E)j8
for(int i=0;i<CountCache.list.size();i++){ ^C{a'
CountBean cb=(CountBean)CountCache.list.getFirst(); &Re