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: iEJQ#5))0
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CountBean.java i Ks,i9j
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/* _?(hWC"0
* CountData.java }Nd`;d
* >m_p\$_
* Created on 2007年1月1日, 下午4:44 ;SlS!6.W-
* jN'fm
* To change this template, choose Tools | Options and locate the template under VATXsD
* the Source Creation and Management node. Right-click the template and choose asmW
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* Open. You can then make changes to the template in the Source Editor. abJ@>7V
*/ 3qxG?G N
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package com.tot.count; F)<G]i8n~
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/** (-Ct!aW|
* L9unhx
* @author 9^
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*/ K^cWj_a"
public class CountBean { EfrkB"
private String countType; hO<w]jV,
int countId; meM.?kk(
/** Creates a new instance of CountData */ |>/&EElD
public CountBean() {} He71h(BHm
public void setCountType(String countTypes){ s?Qb{
this.countType=countTypes; 7L~ zI>2
} h7W%}6Cqkw
public void setCountId(int countIds){ f'i8Mm4IL
this.countId=countIds; =Q=&Ucf_
} g`5`KU|
public String getCountType(){ Uc4L|:
return countType; GZhfA ;O,
} @IyH(J],h
public int getCountId(){ }^Ua
return countId; 4k&O-70y4^
} !Bd*
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} CXP $bt}
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CountCache.java IIt^e#s&
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/* m|cWX"#g
* CountCache.java b\|p
* PHiX:0zT
* Created on 2007年1月1日, 下午5:01 cT=wJ
* #NQz&4W
* To change this template, choose Tools | Options and locate the template under ,w/mk$v
* the Source Creation and Management node. Right-click the template and choose nXeK,C
* Open. You can then make changes to the template in the Source Editor. gq:TUvX
*/ <11Tqb
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package com.tot.count; 8,H5G`
import java.util.*; xP/1@6]_Je
/** 6_&6'Vq
* C7 &
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* @author pv?17(w(\
*/ \|>`z,;
public class CountCache { a^}P_hg}-
public static LinkedList list=new LinkedList(); V8U`%/`N
/** Creates a new instance of CountCache */ A*;^F]~'
public CountCache() {} g;Sg
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public static void add(CountBean cb){ ~ew**@N
if(cb!=null){ ^(m6g &$(
list.add(cb); [?f.0q
} ]{6yS9_tuI
} vyx\N{
} Lv5
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CountControl.java ESf7b `tS
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/* kcz#8K]~
* CountThread.java at(p,+ %
* Jx
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* Created on 2007年1月1日, 下午4:57 ):\{n8~
* H{A| ~V)
* To change this template, choose Tools | Options and locate the template under -S3+
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* the Source Creation and Management node. Right-click the template and choose UV8r&O
* Open. You can then make changes to the template in the Source Editor. 8W<)c
*/ &'ETx"
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package com.tot.count; u+gXBU
import tot.db.DBUtils; 2"Uk}Yz|
import java.sql.*; v0MOX>`s
/** GxDF7
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* ?nSp?m;
* @author
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*/ @)'@LF1Z
public class CountControl{ F)iGD~
private static long lastExecuteTime=0;//上次更新时间
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private static long executeSep=60000;//定义更新间隔时间,单位毫秒 >/`cmNmb
/** Creates a new instance of CountThread */ *_K-T#
public CountControl() {} GuY5 %wr
public synchronized void executeUpdate(){ <w2NJ~M^
Connection conn=null; dUtIAh-j
PreparedStatement ps=null; -Tkd@
try{ Y&