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: %G\rL.H|
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CountBean.java .D)'ZY
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/* kS=OX5
* CountData.java Zroj-3-X~
* s:;!QIC5jo
* Created on 2007年1月1日, 下午4:44 WI}P(!h\J
* LA"`8
* To change this template, choose Tools | Options and locate the template under 9Z
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* the Source Creation and Management node. Right-click the template and choose =AZ>2P
* Open. You can then make changes to the template in the Source Editor. v0=^Hym
*/ u]"oGJj1
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package com.tot.count; g4I(uEJk
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/** !:rQ@PSy9
* .xCO_7Rd
* @author *>S\i7RET
*/ yWt87+%T
public class CountBean { 3x'BMAA+
private String countType; ).-B@&Eu%
int countId; /-G;#Wm
/** Creates a new instance of CountData */ .w[]Q;K_[)
public CountBean() {} j"J2&Y2
public void setCountType(String countTypes){ 3xV
this.countType=countTypes; 9$UjZ$ v
} >JrQS"[u
public void setCountId(int countIds){ R}>Gk
this.countId=countIds; u -CY-
} duT2:~H2
public String getCountType(){ el7P
return countType; l"b78n
} xJN
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public int getCountId(){ :m^eNS6:
return countId; N;<<-`i
} (#LV*&K%IC
} rK}*Uwut
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CountCache.java ?<xGO@b
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/* )#IiHBF
* CountCache.java Yz\z
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* FU5vo
* Created on 2007年1月1日, 下午5:01 VX2bC(E'%
* 7GWPsaPn
* To change this template, choose Tools | Options and locate the template under &hyr""NkAm
* the Source Creation and Management node. Right-click the template and choose T3%yV*F,
* Open. You can then make changes to the template in the Source Editor. "2N3L8?k
*/ "7Zb)Ocb
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package com.tot.count; yi
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import java.util.*; 1MX:^L!f8
/** L?4c8!Q
* 2EycFjO
* @author !T6oD]x3
*/ }qi6K-,oU
public class CountCache { :$dGcX}
public static LinkedList list=new LinkedList(); =>4>Z_q
/** Creates a new instance of CountCache */ V,*YM
public CountCache() {} k]ptk^
public static void add(CountBean cb){ vC&y:XMt,`
if(cb!=null){ 2
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list.add(cb); M+
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} kHm1aE<
} N[){yaj
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CountControl.java r-H~MisL
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/* Xe:B*
* CountThread.java :-ax5,J> q
* V0c*M>V
* Created on 2007年1月1日, 下午4:57 q~_Nv5r%O
* ?K|PM<A
* To change this template, choose Tools | Options and locate the template under }\OLBg/
* the Source Creation and Management node. Right-click the template and choose D>VI{p
* Open. You can then make changes to the template in the Source Editor. 4Y Xtl+G
*/ #:DDx5%x<b
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package com.tot.count; m/cbRuPWgP
import tot.db.DBUtils; 8 y/YX
import java.sql.*; ubj
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/** s7D_fv4e
* M5: f^
* @author FWq6e,
*/ 2:&8FdU
public class CountControl{ MS_&;2
private static long lastExecuteTime=0;//上次更新时间 N@58R9P<p
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 J55K+
/** Creates a new instance of CountThread */ :BC0f9
public CountControl() {} <@A/`3_O)
public synchronized void executeUpdate(){ 9'Pyo`hJ#U
Connection conn=null; Op~sR ^ez
PreparedStatement ps=null; B.'@~$
try{ &