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: 4+>~Ui_#
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CountBean.java MsIaMW _
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/* 3LQu+EsS
* CountData.java n|.eL8lX.<
* :Id8N~g
* Created on 2007年1月1日, 下午4:44 [KGj70|~
* \{*`-Pv
* To change this template, choose Tools | Options and locate the template under `:ZaT('h
* the Source Creation and Management node. Right-click the template and choose mV}8s]29
* Open. You can then make changes to the template in the Source Editor. ;x_T*} CH
*/ t#f-3zd9
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package com.tot.count; X/%!p<}:'
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/** JC$_Pg!
* g]MgT-C|
* @author (:H4
*/ M?sTz@tqq
public class CountBean { wE9z@\z]
private String countType; R'_F9\
int countId; m/g[9Y
/** Creates a new instance of CountData */ ,Cm1~ExJ
public CountBean() {} ;)f,A)(Z
public void setCountType(String countTypes){ m(xyEU
this.countType=countTypes; 'T|QG@q
} C@XnV=J
public void setCountId(int countIds){ F6DVq8f9
this.countId=countIds; d@ZXCiA},
} /55 3v;l<
public String getCountType(){ =yJc pj
return countType; |P9Mhf N
} ;l `(1Q/
public int getCountId(){ !*qQ7
return countId; c.-dwz
} 6~!7?FK
} "_rpErm
}
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CountCache.java xOxyz6B\
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/* Qdc#v\B
* CountCache.java h|z59h&X8G
* +*qTZIXj
* Created on 2007年1月1日, 下午5:01 Y,4?>:39J
* K.? S,qg
* To change this template, choose Tools | Options and locate the template under %gqu7}'
* the Source Creation and Management node. Right-click the template and choose Ql}#mC.>/
* Open. You can then make changes to the template in the Source Editor. sx[mbKj<
*/ 5}9rpN{y
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package com.tot.count; qMqf7 .
import java.util.*; Cw.DLg
/** [--] ?Dr
*
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* @author n#P?JyGm1g
*/ +q432ZG
public class CountCache { 7S_"h*Ud
public static LinkedList list=new LinkedList(); 5Yk|
/** Creates a new instance of CountCache */ o(i?_4E
public CountCache() {} @-1VN;N
public static void add(CountBean cb){ YpSK|(
if(cb!=null){ a\MJh+K
list.add(cb); )Y1+F,C
} ,I f9w$(z
} W\ARCcTQ
} ))6iVgSE$
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CountControl.java !*k'3rKOW
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/* i~DLo3
* CountThread.java Ao9=TC'v$'
* riglEA[^
* Created on 2007年1月1日, 下午4:57 FePWr7Ze
* RDqQ6(e"
* To change this template, choose Tools | Options and locate the template under :WSszak
* the Source Creation and Management node. Right-click the template and choose OOz;/kay
* Open. You can then make changes to the template in the Source Editor. y<8o!=Tb5
*/ @A%\;oo
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package com.tot.count; %SMP)4Y/R
import tot.db.DBUtils; fdKTj
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import java.sql.*; f5CnJhE|)
/** <oTNo>U/k
* \T`iq[+6
* @author d^aLue>g;+
*/ 0o?2Sf`L\*
public class CountControl{ <3{>;^|e
private static long lastExecuteTime=0;//上次更新时间 #|cr\\2*
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 G'_5UP!
/** Creates a new instance of CountThread */ i"M$hXO
public CountControl() {} =:^f6"p&Z
public synchronized void executeUpdate(){ ueJ_F#y
Connection conn=null; n]_<6{: U
PreparedStatement ps=null; wcDb| H&
try{ +oa>k
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conn = DBUtils.getConnection(); <;E>1*K}8
conn.setAutoCommit(false); Z#_VxA>]v
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); $olITe"$g
for(int i=0;i<CountCache.list.size();i++){ G9c2kX.Bf
CountBean cb=(CountBean)CountCache.list.getFirst(); +,0 :L :a
CountCache.list.removeFirst(); r}XsJ$
ps.setInt(1, cb.getCountId()); +&