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: @~$=96^
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CountBean.java 7mi=Xa:U
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/* MTE1\,
* CountData.java ^oC>,%7
* qrOesSdc
* Created on 2007年1月1日, 下午4:44 j3w~2q"r
* ~IO'"h'w
* To change this template, choose Tools | Options and locate the template under U%1M?vT/
* the Source Creation and Management node. Right-click the template and choose $ta"Ug.z
* Open. You can then make changes to the template in the Source Editor. h-Ks:pcR
*/ 1n2Pr'|s
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package com.tot.count; ''9K(p6
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/** 2|exY>`w
* m|?1HCRXRI
* @author V0,5c`H c
*/ {Gfsiz6
public class CountBean { 8KR17i1
private String countType; 7Y.yl F:
int countId; T[[E )f1[
/** Creates a new instance of CountData */ FR50y+h^$
public CountBean() {} 9P
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public void setCountType(String countTypes){ Wkb>JnPo
this.countType=countTypes; yoq-H+<
} P&c O2
public void setCountId(int countIds){ vqUYr
this.countId=countIds; <Cs9$J
} uW}M1kq?+l
public String getCountType(){ ):=8w.yC
return countType; 2WKIO|'
} 2}P{7flDY
public int getCountId(){ SJ8
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return countId; {KTZSs $n
} hQzT
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} o4rf[.z
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CountCache.java CIwI1VR^
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/* i[33u p
* CountCache.java
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* { }Afah
* Created on 2007年1月1日, 下午5:01 ed/
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* )WEOqaR]
* To change this template, choose Tools | Options and locate the template under T9}dgf
* the Source Creation and Management node. Right-click the template and choose vXdI)Sx[
* Open. You can then make changes to the template in the Source Editor. A$P Oc<
*/ a(-t"OL\
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package com.tot.count; :W-xsw
import java.util.*; $RRh}w\0^
/** - sq=|
* (S=CxK
* @author ffOV7Dxy
*/ ^'sy hI\
public class CountCache { gz:US77
public static LinkedList list=new LinkedList(); {c
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/** Creates a new instance of CountCache */ *m&'6qsS
public CountCache() {} qvh8~[
public static void add(CountBean cb){ M6Ik 'r"M
if(cb!=null){ |D;I>O^"R
list.add(cb); : 9>U+)%
} =.`e4}u \X
} W$D:mw7
} ZS&+<kGD
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CountControl.java (G>g0(;D-
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/* 2R3)/bz-SV
* CountThread.java -ebyW#
* j3?@p5E(
* Created on 2007年1月1日, 下午4:57 \$,;@H5I^
* k_OzkEM9!
* To change this template, choose Tools | Options and locate the template under K9RRY,JB
* the Source Creation and Management node. Right-click the template and choose &6\E'bBt
* Open. You can then make changes to the template in the Source Editor. A(C0/|#V
*/ +I.{y
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package com.tot.count; _4lKd`
import tot.db.DBUtils; 1q*=4O
import java.sql.*; @C~gU@F
/** +=kz".$
* 2-#&ktM%V
* @author b u/GaE~
*/ Jjx1`S*i
public class CountControl{ >IS BK[=H
private static long lastExecuteTime=0;//上次更新时间 )RT:u)N
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 ln09_Lr
/** Creates a new instance of CountThread */ S;!7/z
public CountControl() {} 6I5LZ^/ G9
public synchronized void executeUpdate(){ M"OCwBTU
Connection conn=null; %wq;<'W
PreparedStatement ps=null; `4|:8@,3{
try{ ^
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conn = DBUtils.getConnection(); E@@XWU21;N
conn.setAutoCommit(false); S]c&