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: %n9}P ,
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CountBean.java W9Bl'e
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/* *n2Q_o
* CountData.java >3X!c"#l
* ?U2ed)zzw
* Created on 2007年1月1日, 下午4:44 OHqLMBW!!
* &H,j
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* To change this template, choose Tools | Options and locate the template under T8ZBQ;o
* the Source Creation and Management node. Right-click the template and choose P~i^V;g
* Open. You can then make changes to the template in the Source Editor. r&xqsZ%R
*/ _d]w)YMO
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package com.tot.count; 3.Qf^p
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/** -^$CGRE6A
* $ZXy&?4
* @author @"kA&=0;|J
*/ JXGIVH?Rpu
public class CountBean { )Bl% {C
private String countType; =q^o6{d0"
int countId; |I7P0JqP
/** Creates a new instance of CountData */ Yiu)0\ o
public CountBean() {} ?qw&H /R
public void setCountType(String countTypes){ q!""pr<n
this.countType=countTypes; dj?.Hc7od
} PFG):i-?
public void setCountId(int countIds){ |>A1J:
this.countId=countIds; ZHICpL
} }o=R7n%
public String getCountType(){ hof$0Fg
return countType; cIja^xD
} &EXql']
public int getCountId(){ {+z+6i
return countId; =a?l@dI]
} `wB(J%w
} A]BG*
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CountCache.java E7^tU416
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/* kdQ=%
* CountCache.java 8_Y{7;<ey
* 0OEyJ|g
* Created on 2007年1月1日, 下午5:01 C
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* TxN#3m?G
* To change this template, choose Tools | Options and locate the template under AvEJX0"\df
* the Source Creation and Management node. Right-click the template and choose cm-cwPAh
* Open. You can then make changes to the template in the Source Editor. 6rt.ec(
*/
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package com.tot.count; uS :3Yo
import java.util.*; ) *:<3g!
/** =\s(v-8
* x:8x GG9
* @author ?_9cFo59:
*/ >@^z?nb
public class CountCache { M ,.++W\
public static LinkedList list=new LinkedList(); e*gCc7zz
/** Creates a new instance of CountCache */ Ve>*KHDSt
public CountCache() {} EgIFi{q=0
public static void add(CountBean cb){ 9ls<Y
if(cb!=null){ C:/ca)
list.add(cb); eK\ O>
} 2d+IROA
} e#`wshtN:
} $?p^
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CountControl.java _$/(l4\T[
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/* Tysh~C|1
* CountThread.java %)_R>. >
* =g'7 xA
* Created on 2007年1月1日, 下午4:57
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* m;o \.s
* To change this template, choose Tools | Options and locate the template under 3$+|nP:U
* the Source Creation and Management node. Right-click the template and choose ?b, eZ+t
* Open. You can then make changes to the template in the Source Editor. '/
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*/ CD1}.h
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package com.tot.count; o PRvd_~
import tot.db.DBUtils; R7cY$K{j
import java.sql.*; FCQI fJ#
/** Z[KXDQn8
* PIP2(-{ai
* @author ;<0Q<0G
*/ `/ix[:}m^
public class CountControl{ w'ZL'/d
private static long lastExecuteTime=0;//上次更新时间 UzFd@W u#
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 "_jczr$*
/** Creates a new instance of CountThread */ Q(gu";&
public CountControl() {} OtJYr1:y_
public synchronized void executeUpdate(){ {y=H49
Connection conn=null; tDFN
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PreparedStatement ps=null; lY!`<