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: :NWrbfz
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CountBean.java ?:RWHe.P
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/* SxM5'KQ
* CountData.java By0Zz
* $tebNiP
* Created on 2007年1月1日, 下午4:44 xllmF)]*Y
* 7L!q{%}
* To change this template, choose Tools | Options and locate the template under )/t=g
* the Source Creation and Management node. Right-click the template and choose &F +hh{
* Open. You can then make changes to the template in the Source Editor. RD*.n1N1
*/ %#7^b=;=
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package com.tot.count; 0&2&F=fOa<
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/** E%)3{#.z
* vLM-v
* @author wpm $?X
*/ <U""CAE
public class CountBean { pKk{Q0Rt
private String countType; Dn;$4Dak(
int countId; T'VKZ5W
/** Creates a new instance of CountData */ TK%MVL TK
public CountBean() {} qTnk>g_oS&
public void setCountType(String countTypes){ K.6xNQl{}
this.countType=countTypes; :D=y<n;S+
} RSf*[2
public void setCountId(int countIds){ l' a<k"
this.countId=countIds; n UD;y}}n
} b#_u.vP
public String getCountType(){ .BZ3>]F3<
return countType; $C6O<A
} |_wbxdq
public int getCountId(){ 0bR})}a+Yg
return countId; :FI4GR*?
} XFvPc
} 5E\&O%W"
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CountCache.java @*~cmf&FIQ
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/* |'12Kv]#Xa
* CountCache.java </7?puVR
* 0'^zIL#.
* Created on 2007年1月1日, 下午5:01 >J@hqW
* }9(:W </}
* To change this template, choose Tools | Options and locate the template under a(eUdGJ
* the Source Creation and Management node. Right-click the template and choose mybjcsV4
* Open. You can then make changes to the template in the Source Editor. ZCCwx71j
*/ FtxmCIVIV~
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package com.tot.count; .tRWL!
import java.util.*; J"]P"`/
/** {K+]^M
* $5#+;A'Q+
* @author MIWI0bnf
*/ cvQMZ,p
public class CountCache { dK?vg@|'
public static LinkedList list=new LinkedList(); 4krK CD>|G
/** Creates a new instance of CountCache */ YW)&IA2
public CountCache() {} pL)o@-k#%
public static void add(CountBean cb){ u6u1>
if(cb!=null){ h8tKYm
list.add(cb); wr;8o*~
} F /% 5 r{
} l+i9)Fc<i
} !3#*hL1fy
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CountControl.java iMr/i?`i
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/* MzO4Yv"A
* CountThread.java Ue)8g#
* 3 ~^ }R
* Created on 2007年1月1日, 下午4:57 &5F@u
IA
* 7\1bq&a<
* To change this template, choose Tools | Options and locate the template under 9DP6g<>B
* the Source Creation and Management node. Right-click the template and choose ,Q8)r0 c
* Open. You can then make changes to the template in the Source Editor. O U3KB
*/ m\xE8D(,
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package com.tot.count; Jri"Toz0
import tot.db.DBUtils; )mMHwLDwH
import java.sql.*; _Tj`
/** `?R~iLIAq
* .ahYjn
* @author U.HeIJ#
*/ !FVXNl
public class CountControl{ Gdf*x<T1
private static long lastExecuteTime=0;//上次更新时间 %rZJ#p[e)=
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 _4jRUsvjY
/** Creates a new instance of CountThread */ |0$wRl+kN
public CountControl() {} }^
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public synchronized void executeUpdate(){ rwUKg[
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Connection conn=null; 2,O;<9au<
PreparedStatement ps=null; Lg[_9`\
try{ @ \(*pa
conn = DBUtils.getConnection(); Dk XB
conn.setAutoCommit(false);
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ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); 5w+X
for(int i=0;i<CountCache.list.size();i++){ &jHnM^nQ
CountBean cb=(CountBean)CountCache.list.getFirst(); REvY`
CountCache.list.removeFirst(); qm1; ^j&