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: Nm:|C 3_I
*}WqYqOow
CountBean.java ?$8 ,j+&I
EpoQV ^Ey
/* $m%/veD k
* CountData.java Ad N=y8T
* B8#f^}8
* Created on 2007年1月1日, 下午4:44 7_'k`J@_
* O9 Au =
* To change this template, choose Tools | Options and locate the template under HIp {< M3
* the Source Creation and Management node. Right-click the template and choose Rx"VscB6z
* Open. You can then make changes to the template in the Source Editor. CYic_rF$
*/ \?mU$,voI
MvjwP?J]
package com.tot.count; +P6
m5Laq'~0_
/** ,vY
I
O
* u #QSa$P
* @author
S~5 =1b
*/ 1MzB?[gx
public class CountBean { 9{J8q
private String countType; ~[X:twidkL
int countId; ~(doy@0M
/** Creates a new instance of CountData */ "e};?|y
public CountBean() {} $YO]IK$
public void setCountType(String countTypes){ 6I.+c
this.countType=countTypes; V9 t:JY
} GH)+yD[o
public void setCountId(int countIds){ ~|d?o5W
this.countId=countIds; %KVRiX
} 5>k~yaju/
public String getCountType(){ |c+N)FB
return countType; P6Z,ci17
} <h>fip3o
public int getCountId(){ "kuBjj2
return countId; W;x LuKIG
}
kd2'-9
} D
`3yv
R
7&U+f:-w
CountCache.java E^>7jf09,
L$07u{Q
/* Vblf6qaBs
* CountCache.java 5suSR;8
* hdDI%3vk3
* Created on 2007年1月1日, 下午5:01 O#Ax P}
* ]$k
m
* To change this template, choose Tools | Options and locate the template under 3G0\i!*t
* the Source Creation and Management node. Right-click the template and choose [8g\pPQ
* Open. You can then make changes to the template in the Source Editor. C4d1*IQk
*/ OpX
HOI`F3#XI
package com.tot.count; sN/Xofh
import java.util.*; kR|DzB7
/** 2F)OyE
* ;iI2K/ 3
* @author /|^^v DL
*/ 8{^GC(W{]
public class CountCache { ;@\JscNJ|
public static LinkedList list=new LinkedList(); F>{uB!!L4
/** Creates a new instance of CountCache */ 0
#;
s{7k
public CountCache() {}
d~s-;T
public static void add(CountBean cb){ \evgDZf
if(cb!=null){ ;Cpm3at
list.add(cb); <^$b1<@
} GdwHm
} =7Gi4X%
} fH{$LjH(
u"3cSuqy
CountControl.java lw lW.C
:7]R2JP
/* BU .G~0
* CountThread.java qoq<dCt3
* R5~m"bE
* Created on 2007年1月1日, 下午4:57 1KEPD@0oxx
* [_GR'x'0x
* To change this template, choose Tools | Options and locate the template under n m$G4Q
* the Source Creation and Management node. Right-click the template and choose 6/C
* Open. You can then make changes to the template in the Source Editor. J)~=b_'<
*/ g4932_tC
N^>g=Ub
package com.tot.count; 3Sb%]f5(
import tot.db.DBUtils; :zZM&r>
import java.sql.*; z>q_]U0
/** gC:E38u
* "A$Y)j<#G
* @author ^E8Hv
*/ s7gf7E#Y
public class CountControl{ LD"}$vfs
private static long lastExecuteTime=0;//上次更新时间 g[Y$SgJ
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 Zz ?y&T
/** Creates a new instance of CountThread */ Kn]WXc|("
public CountControl() {} hj[g2S%X
public synchronized void executeUpdate(){ }e6:&`a xD
Connection conn=null; \p|!=H@
PreparedStatement ps=null; T{Q&