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: +((31l
s3!LR2qiF
CountBean.java ;<R_j%*
\k-juF80
/* iC2nHZ*,
* CountData.java (>`SS#(T!
*
x`l;
;
* Created on 2007年1月1日, 下午4:44 {YTF]J$
* kU>|E<c*
* To change this template, choose Tools | Options and locate the template under trt\PP:H%
* the Source Creation and Management node. Right-click the template and choose zFQkUgb
* Open. You can then make changes to the template in the Source Editor. Y rnqi-P
*/ ]H7Mx\
/\I%)B47^9
package com.tot.count; l#.,wOO{
;!sGfrs0$
/**
r@UY$z
* M.^A`
* @author 80>!qG
*/ 2![W
N*N>O
public class CountBean { $s!meg@s
private String countType; 7V``f:#d
int countId; "
CoR?[,x
/** Creates a new instance of CountData */ ,]qX_`qF
public CountBean() {} ]}y'3aW
public void setCountType(String countTypes){ nQ3goVRFP
this.countType=countTypes; xmx;tq
} VjMuU"++@
public void setCountId(int countIds){ ,X6j$YLWp
this.countId=countIds; x^skoz
} '
uw&f;/E
public String getCountType(){ ;CBdp-BUj
return countType; SnU{ZGR>sP
} A6.'1OD
public int getCountId(){ ^ w1R"qE"m
return countId; 2` qXDfD`
} UH|.@7w
} BQg]$Tr?
l);8y5
CountCache.java Y\\nJuJo
T
bWZw
/* mj|9x1U)
* CountCache.java dq(L1y870
* e1Hx"7ew_
* Created on 2007年1月1日, 下午5:01 K a|\gl;V
* @1Lc`;Wd
* To change this template, choose Tools | Options and locate the template under >f8,YisH
* the Source Creation and Management node. Right-click the template and choose !2I wuru
* Open. You can then make changes to the template in the Source Editor. ji=po;g=E
*/ z59J=?|
S,%HW87
package com.tot.count; S`KCVQ>V
import java.util.*; nJg2O@mRJ
/** rM |RGe
* m/Z_ HER^
* @author hh}EDnx
*/ :h~!#;w_
public class CountCache { <2d@\"AoHE
public static LinkedList list=new LinkedList(); Ij_`=w<
/** Creates a new instance of CountCache */ h_!"CF<n
public CountCache() {} gv-k}2u_
public static void add(CountBean cb){ s'4p+eJ
if(cb!=null){ MEUqQ4/Gl
list.add(cb); CU_06A|}
} (B#|3o
} mX_`rvYII
} L9)&9
/f
|pY0IqO
CountControl.java a| cD{d
rd{(E
/* .#|pje^
* CountThread.java wv-8\)oA
* UkV] F]
* Created on 2007年1月1日, 下午4:57 `<d>C}9
* v%[mt`I
* To change this template, choose Tools | Options and locate the template under Q2=~
* the Source Creation and Management node. Right-click the template and choose 9Z
4R!Q
* Open. You can then make changes to the template in the Source Editor. :g";p.~=
*/ XU7bWafy
$)V4Eu;
package com.tot.count; Km-B=6*QY
import tot.db.DBUtils; Wz]S+IpY
import java.sql.*; <
.!3yy
/** iN*@f8gf
* m
Y0C7i
* @author XQ8Imkc
*/ v2V1&-
public class CountControl{ eGil`:JY"
private static long lastExecuteTime=0;//上次更新时间 .YRSd
private static long executeSep=60000;//定义更新间隔时间,单位毫秒 Ls{fCi/2F
/** Creates a new instance of CountThread */ jFfki.H
public CountControl() {} swrd
public synchronized void executeUpdate(){ M-gjS6c\3
Connection conn=null; &EOh}O<
PreparedStatement ps=null; Ui&$/%Z|
try{ OLwxGRYX
conn = DBUtils.getConnection(); %54![-@
conn.setAutoCommit(false); qT4s*kqr
ps=conn.prepareStatement("update t_news set hits=hits+1 where id=?"); 4{KsCd)
for(int i=0;i<CountCache.list.size();i++){ %*nZ,r
CountBean cb=(CountBean)CountCache.list.getFirst(); y]_DW6W
CountCache.list.removeFirst(); yNL71 >w4
ps.setInt(1, cb.getCountId()); |z%,W/Ef
ps.executeUpdate();⑴ t/g}cR^Q
//ps.addBatch();⑵ Xc^~|%+
} 9@06]EI_
//int [] counts = ps.executeBatch();⑶ R7i*f/m
conn.commit(); Cn<