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: <aSLm=
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CountBean.java N 1f~K.e\
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/* N<Z)b!o%u
* CountData.java 7{+Io
* w
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* Created on 2007年1月1日, 下午4:44 #!=>muZt
* _2gT1B
* To change this template, choose Tools | Options and locate the template under jU4)zN/`r
* the Source Creation and Management node. Right-click the template and choose Q$.V:#
* Open. You can then make changes to the template in the Source Editor. GkGC4*n
*/ "Eok;io
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package com.tot.count; (m3I#L
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/** U8QR*"GmT
* M ,_^hm7
* @author j^$3vj5E[
*/ g?A5'o&Yu
public class CountBean { Sp`fh7d.(
private String countType; iZ.&q
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int countId; kf^-m/
/** Creates a new instance of CountData */ *@G(3 n
public CountBean() {} 0'%+X|
public void setCountType(String countTypes){ 4-d99|mv
this.countType=countTypes; zN)|g
} g=oeS%>E
public void setCountId(int countIds){ 76IALJ00V
this.countId=countIds; yNqm]H3<MP
} !|Xl 8lV`
public String getCountType(){ :L [YmZ
return countType; )kL`&+#>
} Jp.3KA>
public int getCountId(){ >xU72l#5
return countId; >d27[%
} _!C)r*0(
} vA2,&%jw
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CountCache.java ]cLEuE^&
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/* liCCc;&B;
* CountCache.java 3D$\y~HU
* 4iYKW2a
* Created on 2007年1月1日, 下午5:01 v't6
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* c_-" Qo
* To change this template, choose Tools | Options and locate the template under "S B%02
* the Source Creation and Management node. Right-click the template and choose *fQ?A|l!x
* Open. You can then make changes to the template in the Source Editor. *2"bG1`
*/ &3 XFgHo
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package com.tot.count; N'eQ>2>O@
import java.util.*; 2sd ) w
/** s.p1L
* k}I5x1>&
* @author C>JekPeM
*/ 7}#*3*]
public class CountCache { y?*[}S
public static LinkedList list=new LinkedList(); $/<"Si&(
/** Creates a new instance of CountCache */ 5I)~4.U|,m
public CountCache() {} U+9-li
public static void add(CountBean cb){ j1;_w
if(cb!=null){ _#J_$CE#
list.add(cb); cYq']$]
} vR%j#v|s
} 1IOo?e=/bM
} _gPVmGG
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CountControl.java n!kk~65|
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/* u5cVz_S
* CountThread.java To# E@Nw
* Nh1e1m?
* Created on 2007年1月1日, 下午4:57 0okO+QU,a
* ;B|^2i1Wi
* To change this template, choose Tools | Options and locate the template under #uD)0zdw
* the Source Creation and Management node. Right-click the template and choose (<]\,pP0_
* Open. You can then make changes to the template in the Source Editor. u|m[(-`
*/ gJ FR1
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package com.tot.count; >+Sv9S
import tot.db.DBUtils; e'k;A{Oh
import java.sql.*; ueWR/
/** %jbJ6c
* *2 qh3
* @author &jXca| wAR
*/ 629~Uc6]
public class CountControl{ 9atjK4+o
private static long lastExecuteTime=0;//上次更新时间 xecieC
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 jy\W_CT
/** Creates a new instance of CountThread */ p|FlWR'mA
public CountControl() {} mHK@(D7X
public synchronized void executeUpdate(){ #/n|@z'
Connection conn=null; AkYupP2]v
PreparedStatement ps=null; G8^0^@o
try{ ot|N;=ZKo
conn = DBUtils.getConnection(); MO));M)
conn.setAutoCommit(false); vHs>ba$"
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); ]~j_N^oZ1X
for(int i=0;i<CountCache.list.size();i++){ J<