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: wp@6RJ
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CountBean.java 4z^~,7J^
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/* 9QeBz`lm)
* CountData.java N1U.1~U
* C%/@U[;
* Created on 2007年1月1日, 下午4:44 ]|[mwC4
* 'G`xD3 E3,
* To change this template, choose Tools | Options and locate the template under 9MbF:
* the Source Creation and Management node. Right-click the template and choose q}(f9
* Open. You can then make changes to the template in the Source Editor. ]puDqu5!
*/ zY].ZS=7
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package com.tot.count; C\ 34R
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/** {RD9j1
* GZmfE`
* @author }hXmK.['
*/ Xod/GYG
public class CountBean { eGWwPSIp
private String countType; 52r\Q}v$
int countId; 0Cyus
/** Creates a new instance of CountData */ p.,`3"C1
public CountBean() {} tnq ZlS
public void setCountType(String countTypes){ }x_:v!G
this.countType=countTypes;
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} dX-j3lM:#
public void setCountId(int countIds){ 7bR[.|T
this.countId=countIds; Q=epUHFs
} <co:z<^lqu
public String getCountType(){ ,5x9o"N!
return countType; O_*tDq,e
} G}nj
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public int getCountId(){ BNixp[Hc
return countId; U:|:Y=O?Q
} O1oh,~W
} %)e&"mq!|
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CountCache.java g c<Y?a-
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/* SOS|3q_`
* CountCache.java r6nWrO>y
* 66po SZR@
* Created on 2007年1月1日, 下午5:01 `/(9#E
* (7X^z&2
* To change this template, choose Tools | Options and locate the template under :S+Bu*OyH
* the Source Creation and Management node. Right-click the template and choose ;Ji3|=4u
* Open. You can then make changes to the template in the Source Editor. $$'[%
*/ 6)~7Uf:<v
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package com.tot.count; DyRU$U
import java.util.*; P[H 4Yp
/** v\5`n@}4
* (?P\;yDG
* @author #_: %Yd
*/ L;
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public class CountCache { Yb'%J@T}
public static LinkedList list=new LinkedList(); ?%b#FXA
/** Creates a new instance of CountCache */ QL-E4]
public CountCache() {} |doG}C
public static void add(CountBean cb){ 9]|C$;kw@
if(cb!=null){ rW*[sLl3
list.add(cb); 5$*=;ls>J
} V :lKF')
} 6N/6WrQEeg
} <{z-<D;
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CountControl.java uFfk!
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/* xqv&^,ic
* CountThread.java )p{,5"0u
* (?[%u0%_
* Created on 2007年1月1日, 下午4:57 dfXBgsc6i
* a*nCvZ
* To change this template, choose Tools | Options and locate the template under /LG}nY
* the Source Creation and Management node. Right-click the template and choose CZkmd
* Open. You can then make changes to the template in the Source Editor. yxi* 4R
*/ M'@
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package com.tot.count; u/J1Z>0
import tot.db.DBUtils; $@~sO0q
import java.sql.*; Ru$%gh>v
/** ^g"% :4zO
* jT4
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* @author p uW
*/ }eSrJgF4M
public class CountControl{ !_-Uwg
private static long lastExecuteTime=0;//上次更新时间 HcGbe37Xq
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 E U'P
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/** Creates a new instance of CountThread */ "!:)qVL^
public CountControl() {} _CizU0S
public synchronized void executeUpdate(){ R?#.z#
Connection conn=null; ?2K~']\S
PreparedStatement ps=null; 4p>,
try{ qCm8R@
conn = DBUtils.getConnection(); x.'Ys1M
conn.setAutoCommit(false); aX*7tRn_%
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); D&D-