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: {Qv Whf
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CountBean.java Wl?0|{W
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/* {/ef`MxV
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* CountData.java Y-YlQ^
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* Created on 2007年1月1日, 下午4:44 gZ!q
* JO[7_*s
* To change this template, choose Tools | Options and locate the template under /hF@Xh%hY
* the Source Creation and Management node. Right-click the template and choose FqwH:Fcr:
* Open. You can then make changes to the template in the Source Editor. K)DpC* j
*/ J> Z.2
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package com.tot.count; VB&`S+-
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/** 1|bg;X9+
* <b>g^ `}?D
* @author +PAb+E|,
*/ {#U3A_y
public class CountBean { sx1w5rj.Y0
private String countType; 1RHFWK5Si
int countId;
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/** Creates a new instance of CountData */ ngLpiU0H&
public CountBean() {} XiW~?
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public void setCountType(String countTypes){ X\Gbs=sf6
this.countType=countTypes; -}x( MZ
} GUDz>(
public void setCountId(int countIds){ !
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this.countId=countIds; l~(A(1
} " i!Xiy~
public String getCountType(){ cZR9rnZT
return countType; 4(nwi[1Y
} @h=r;N#/`P
public int getCountId(){ |X47&Y
return countId; %^KNY ;E
} (ay((|)
} 5.M82rR;~
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CountCache.java T"_f9?
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/* 9 `+RmX;m
* CountCache.java i&mt-
* 'f_[(o+n
* Created on 2007年1月1日, 下午5:01 8{4SaT.-Rm
* ,II-:&H
* To change this template, choose Tools | Options and locate the template under *G&3NSM-
* the Source Creation and Management node. Right-click the template and choose i K,^|Q8
* Open. You can then make changes to the template in the Source Editor. ]iezwz`'
*/ \p.eY)>
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package com.tot.count; c9O0YQ3&8
import java.util.*; _=YHO.
/** 2'U+QK@
* &zV;p
* @author CbW>yr
*/ uz;zmK
public class CountCache { }'u0Q6Obj
public static LinkedList list=new LinkedList(); wNm 1H[{
/** Creates a new instance of CountCache */ b=PB" -
public CountCache() {} 1ir~WFP
public static void add(CountBean cb){ p N+1/m,
if(cb!=null){ B%(-UTQf
list.add(cb); | K w}S/F
} rO[ Zx'a
} Uys[0n
} ~5:-;ZbZ
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CountControl.java <wTD}.n
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/* \f4JIsZ-&
* CountThread.java 68QA%m'J
* 6Eu"T9(
* Created on 2007年1月1日, 下午4:57 Y^ 2]*e%
* 9s2N!bx
* To change this template, choose Tools | Options and locate the template under K<E|29t^k
* the Source Creation and Management node. Right-click the template and choose -'Oq.$Qq
* Open. You can then make changes to the template in the Source Editor. N$! Vm(S
*/ q?$<{Z"
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package com.tot.count; \O=t5yS
import tot.db.DBUtils; 1X-fiQJe
import java.sql.*; @+&QNI06S
/** A(1dq
* <IwfiI3y
* @author
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*/ |5g1D^b]s^
public class CountControl{ o2_mcJ
private static long lastExecuteTime=0;//上次更新时间 +Z/aB*aVa^
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 iM_Zn!|@\
/** Creates a new instance of CountThread */ PzH#tG&.j
public CountControl() {} mvXIh";
public synchronized void executeUpdate(){ ' Ivr =-
Connection conn=null; D<J,3(Yu
PreparedStatement ps=null; $.KDnl^
try{ tdi^e;:?
conn = DBUtils.getConnection(); n-x%<j(Xf
conn.setAutoCommit(false); 7-j=he/
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); O m5+j:YM
for(int i=0;i<CountCache.list.size();i++){ 8m*uT< 5D
CountBean cb=(CountBean)CountCache.list.getFirst(); &Xp