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: TW|- 0
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CountBean.java 8t. QFze?
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/* c&I
* CountData.java #4JLWg
* 0ckmHv
* Created on 2007年1月1日, 下午4:44 C BoCT3@~
* -Lu&bVt<>
* To change this template, choose Tools | Options and locate the template under m"'}{3$%
* the Source Creation and Management node. Right-click the template and choose +*Z'oC BJ,
* Open. You can then make changes to the template in the Source Editor. !^ad{#|X
*/ gO)":!_n W
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package com.tot.count; !n` |k
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/** yCA8/)>Gm
* !\[JWN@v
* @author ":vEWp+g
*/ =JW-EQ6[T
public class CountBean { ZX64kk+
private String countType; &^#u=w?^x
int countId; ;kY~-Om
/** Creates a new instance of CountData */ NPS*0 y/
public CountBean() {} dJ
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public void setCountType(String countTypes){ !yxqOT-
this.countType=countTypes; o{! :N> (
} \ ZE[7Ae
public void setCountId(int countIds){ v&'#Gg
this.countId=countIds; |oke)w=gn
} AB`.K{h
public String getCountType(){ ?h&?`WO(
return countType; )0iN2L]U;
} IlB8~{p_
public int getCountId(){ *=2W:,$
return countId; Pv/v=s>X
} a!E22k?((z
} iGu%_-S
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CountCache.java GaG>0x
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/* Bskp&NV':
* CountCache.java (X,i,qK/
* SXZ9+<\
* Created on 2007年1月1日, 下午5:01 U:C:ugm
* G:":CX"O(
* To change this template, choose Tools | Options and locate the template under "H).2{3(x
* the Source Creation and Management node. Right-click the template and choose H{vKk
* Open. You can then make changes to the template in the Source Editor. 1wKXOy=v0
*/ ~qrSHn}+PU
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package com.tot.count; Qk:Lo*!
import java.util.*; Td|u@l4B
/** @m9pb+=v
* pWGR#x'
* @author o5tCbsHj-
*/ B5;%R01A
public class CountCache { 1xW!j!A;
public static LinkedList list=new LinkedList(); >bh+!5Y0
/** Creates a new instance of CountCache */ oCaYmi=:
public CountCache() {} BsIF3sS#9
public static void add(CountBean cb){ OL>>/T
if(cb!=null){ phuiLW{&
list.add(cb); u^tQ2&?O!P
} fd&Fn=!
} \Y)HSJR;e
} UhDQl%&He
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CountControl.java RW. qw4
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/* J[ Gpd
* CountThread.java 4d@yAr}
* )A7^LLzG
* Created on 2007年1月1日, 下午4:57 X3:z=X&Zd
* 0+FPAqX
* To change this template, choose Tools | Options and locate the template under
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* the Source Creation and Management node. Right-click the template and choose L1SKOM$
* Open. You can then make changes to the template in the Source Editor. ]<>cjk.ya
*/ O2{["c
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package com.tot.count; T7,]^
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import tot.db.DBUtils; ?.46X^
import java.sql.*; +;KUL6
/** OX7=g$S 1
* *4U_MM#rX
* @author pWV_KS
*/ 6R n?pe^
public class CountControl{ %GhI0F #
private static long lastExecuteTime=0;//上次更新时间 JQ1MuE'
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 |H?t+Dyn)q
/** Creates a new instance of CountThread */ #DUfEZ
public CountControl() {} q5(t2nNb
public synchronized void executeUpdate(){ VHD+NY/
Connection conn=null; QoZV6
PreparedStatement ps=null; DhyR
try{ !?P8[K
conn = DBUtils.getConnection(); u<ed O+
conn.setAutoCommit(false); :<J7 g`f
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); A &