/* 0!tuUn
**SiteFileFetch.java T>J ,kh
*/ amWKykVS5
package NetFox; ZEvK
import java.io.*; L<6nM
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import java.net.*; )RQQhB
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public class SiteFileFetch extends Thread { + f:!9)C
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SiteInfoBean siteInfoBean = null; //文件信息Bean ^sqzlF
long[] nStartPos; //开始位置 > }kZXeR|
long[] nEndPos; //结束位置 [8K :ml
FileSplitterFetch[] fileSplitterFetch; //子线程对象 .bj:tmz
long nFileLength; //文件长度 q4,/RZhzh
boolean bFirst = true; //是否第一次取文件 U=5~]0g
boolean bStop = false; //停止标志 M4% 3a j
File tmpFile; //文件下载的临时信息 (^E5y,H<g
DataOutputStream output; //输出到文件的输出流 ImbA2Gcs
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "F4 3q8 P
public SiteFileFetch(SiteInfoBean bean) throws IOException ?-8DS5
{ h.NCG96S
siteInfoBean = bean; Jm"W+! E
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Hx!eCTO:*
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7U2B=]<e-
if(tmpFile.exists ()) |I{3~+E h
{ !T
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bFirst = false; 8~&=vc
read_nPos(); . i^@v<+
} >7~,w1t
else ngI+afo
{ 1qBE|PwBp
nStartPos = new long[bean.getNSplitter()]; 'pB?
nEndPos = new long[bean.getNSplitter()]; k;)mc+ ~+
} w^,Xa
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} GK[9IF#_>
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public void run() hTmJ
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{ .L]5,#2([
//获得文件长度 [(&aVHUj
//分割文件 #zBqj;p
//实例FileSplitterFetch u7j,Vc'~
//启动FileSplitterFetch线程 $\bVu2&I
//等待子线程返回 $1Zr.ERL|(
try{ =%s6QFR
if(bFirst) }w-M.
{ ai;Q,Vy
nFileLength = getFileSize(); #&1gVkvp
if(nFileLength == -1) iSg0X8J)
{ Q{an[9To~P
System.err.println("File Length is not known!"); T8x8TN"
} p(K^Zc
else if(nFileLength == -2) tmoaa!yRnT
{ B]Ec
System.err.println("File is not access!"); #^R@EZ
} M^>l>?#rl
else lcgG5/82
{ 8si{|*;hL
for(int i=0;i<nStartPos.length;i++) VT=gb/W6)a
{ S4-jF D)U
nStartPos = (long)(i*(nFileLength/nStartPos.length)); t)rPXvx}!
} :R>RCR2g)
for(int i=0;i<nEndPos.length-1;i++) k8%@PC$
{ xEeHQ7J
nEndPos = nStartPos[i+1]; 7AWq3i{
} PN:`SWP
nEndPos[nEndPos.length-1] = nFileLength; .k
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} Ih4$MG6QC
} P"]l/
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//启动子线程 6NHP/bj<1V
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a'.7)f[g}
for(int i=0;i<nStartPos.length;i++) \u))1zRd
{ &\b(
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;jN1n
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), md!!$+a%|
nStartPos,nEndPos,i); bf{_U%`
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9)o@d`*
fileSplitterFetch.start(); FK`:eP{
} V>GJO (9
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?mSZQF:d@
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); NJV kn~<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Q
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nEndPos = " + nFileLength); `H$=hr
// fileSplitterFetch[nPos.length-1].start(); *X ;ch55\
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//等待子线程结束 \okv}x^L=Z
//int count = 0; Gf:dN_e6.
//是否结束while循环 pl)?4[`LUc
boolean breakWhile = false; AO|1m$xf
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while(!bStop) Fq5u%S
{ !
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write_nPos(); ('$*QC.M
Utility.sleep(500); e6
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breakWhile = true; .kMnq8u
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for(int i=0;i<nStartPos.length;i++) |v5
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{ ~I%164B+/
if(!fileSplitterFetch.bDownOver) NGkxg:
{ =&qH%S6
breakWhile = false; Z
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break; x(R;xB
} Vsw:&$
} d_0(;'
if(breakWhile) ZbjUOlE02
break; ,J-|.ER->
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//count++; 4[MTEBx
//if(count>4) kv, !"<
// siteStop(); D6+3f#k6
} "5O>egt
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System.err.println("文件下载结束!"); .XiO92d9
} vyB{35p$
catch(Exception e){e.printStackTrace ();} vw(ecs^C
} 0Q?%B6g$m[
*" C9F/R
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//获得文件长度 ?!/8~'xA6
public long getFileSize() =Y6W
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{ _)!*,\*`{
int nFileLength = -1; QjG/H0*mP
try{ D %)L"5C
URL url = new URL(siteInfoBean.getSSiteURL()); " zD9R4\X.
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SK^(7Ws~0
httpConnection.setRequestProperty("User-Agent","NetFox"); \AA9
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int responseCode=httpConnection.getResponseCode(); XMT@<'fI
if(responseCode>=400) y
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{ RWo7_X O
processErrorCode(responseCode); wvxz:~M
return -2; //-2 represent access is error 9p3~WA/M@
} Mx`';z8~
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String sHeader; >~Tn%u<
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for(int i=1;;i++) $x]/|u/9
{ lNyyLLt
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ak('4j!*}^
//Utility.log(in.readLine()); [u2t1^#Ol
sHeader=httpConnection.getHeaderFieldKey(i); CI$z+zN
if(sHeader!=null) /2c(6h
{ 9&.md,U '
if(sHeader.equals("Content-Length")) C4.GtY8,d
{ ~u2f`67{
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); n*na6rV\k
break; g<M!]0OK
} HiU)q
} ~9vK6;0
else nGYimRYO
break; TNA7(<"fV|
} CM++:Y vJ
} lqJ92vi6Q
catch(IOException e){e.printStackTrace ();} xT*c##
catch(Exception e){e.printStackTrace ();} <!UnH6J.b
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Utility.log(nFileLength); udA@9a^;
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return nFileLength; ~wv$uL8y
} E?P>s T3B
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//保存下载信息(文件指针位置) n5.sx|bI?
private void write_nPos() .udLMS/_
{ U.P1KRY|=
try{ QSa#}vCp*
output = new DataOutputStream(new FileOutputStream(tmpFile)); Bl8|`R^g
output.writeInt(nStartPos.length); &?H$-r1/?V
for(int i=0;i<nStartPos.length;i++) 7Vh
{ w)@Wug
// output.writeLong(nPos); S\:+5}
output.writeLong(fileSplitterFetch.nStartPos); 1 Ga3[g
output.writeLong(fileSplitterFetch.nEndPos); R5^6Kwu
} E&y)`>Nq{
output.close(); Xy=ETV%
}
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catch(IOException e){e.printStackTrace ();} 2sk7E'2(
catch(Exception e){e.printStackTrace ();} ``:[Jr&
} uyB 2
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//读取保存的下载信息(文件指针位置) \ f+;X
private void read_nPos() 'r%(,=L
{ ux(~+<k
try{ `pZX!6Wn
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); rM
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int nCount = input.readInt(); C`kqsK
nStartPos = new long[nCount]; ~//E'V-
nEndPos = new long[nCount];
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for(int i=0;i<nStartPos.length;i++) Qr3!6
{ 9cP{u$
nStartPos = input.readLong(); Q*ELMib
nEndPos = input.readLong(); w->Y92q]
} ,
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input.close(); "49dsKIOH
} {%9@{Q'T.s
catch(IOException e){e.printStackTrace ();} vCJa%}
catch(Exception e){e.printStackTrace ();} ny1O- `!1
} md'wre3
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private void processErrorCode(int nErrorCode) W7
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{ ut560,h~
System.err.println("Error Code : " + nErrorCode); C{uT1`
} }kvix{
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//停止文件下载 !0Nf`iCQ(
public void siteStop() i)X~L4gn
{ +<F3}]]
bStop = true; PLs`Ci|`
for(int i=0;i<nStartPos.length;i++) uE9,N$\L_
fileSplitterFetch.splitterStop(); 7R:Ij[dV
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} {._'Q[
} _%D7D~2r|
//负责部分文件的抓取 e8xq`:4Y
**FileSplitterFetch.java [[AO6.Z
*/ B47 I?~{
package NetFox; o(Z~J}l({
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import java.io.*; c]#}#RJ`\
import java.net.*; 1aRTvaGo
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public class FileSplitterFetch extends Thread { ;#v3C;
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String sURL; //File URL Icg-rwa<Z
long nStartPos; //File Snippet Start Position b,~pwbHf
long nEndPos; //File Snippet End Position ^t
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int nThreadID; //Thread's ID -`\rDPGf
boolean bDownOver = false; //Downing is over |*g#7YL
boolean bStop = false; //Stop identical vMou`[\WlJ
FileAccessI fileAccessI = null; //File Access interface ,s3|
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \z !lw
{ `I wZVz
this.sURL = sURL; ~//9Nz~;3
this.nStartPos = nStart; ;u'VR}4ph
this.nEndPos = nEnd; MW rhVn{R
nThreadID = id; kGAgXtE
fileAccessI = new FileAccessI(sName,nStartPos);//定位 -%fj-Y7y
} ]ASw%Lw)
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public void run() )$E){(Aa
{ [}HPV+j=U
while(nStartPos < nEndPos && !bStop)
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{ m-Jy
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try{ qF bj~ec
URL url = new URL(sURL); :3Q:pKg
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]`x+wWe
httpConnection.setRequestProperty("User-Agent","NetFox"); \X*y~)+K`
String sProperty = "bytes="+nStartPos+"-"; LZ_VLW9wE
httpConnection.setRequestProperty("RANGE",sProperty); ,S`n?.&& 7
Utility.log(sProperty); 5O]tkHYR
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InputStream input = httpConnection.getInputStream(); SQK82/
//logResponseHead(httpConnection); 8ly)G
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byte[] b = new byte[1024]; 1DcBF@3sWG
int nRead; Q}B]b-c+E
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) QEt"T7a[/
{ oZY|o0/9
nStartPos += fileAccessI.write(b,0,nRead); )GG9[%H!
//if(nThreadID == 1) Y2l;NSWU
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8o|C43Q_
} ;AOLbmb)H4
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Utility.log("Thread " + nThreadID + " is over!"); nsi?.c&0!
bDownOver = true; OjlX<y.
//nPos = fileAccessI.write (b,0,nRead); E%v0@
} [nV BnB
catch(Exception e){e.printStackTrace ();} sv%E5@
} 5<PNl~0
} Sq,>^|v4&e
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//打印回应的头信息 4pT^*
public void logResponseHead(HttpURLConnection con) MFa/%O_*
{ zC)JOykI%
for(int i=1;;i++) oc,I,v
{ l([aKm#
String header=con.getHeaderFieldKey(i); D
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if(header!=null) &\6},JN
//responseHeaders.put(header,httpConnection.getHeaderField(header)); aeN #<M&$<
Utility.log(header+" : "+con.getHeaderField(header)); L)U*dY
else ER9{D$
break; BrSvkce
} C=&n1/
} $<)]~**K
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public void splitterStop() Ip7#${f5M
{ "!vY{9,
bStop = true; n!Y_SPg
} v+{{j|x=
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} VV1sadS:S`
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/* Hm'fK$y(
**FileAccess.java "TaLvworb4
*//文件访问(定位,写) *8,W$pe3
package NetFox; B`R@%US
import java.io.*; 9kWI2cLzQt
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public class FileAccessI implements Serializable{ ;Z0&sFm
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 O6?{@l
RandomAccessFile oSavedFile; SN{A@dyt
long nPos; '/UT0{2;rS
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public FileAccessI() throws IOException ,_YI:xie|c
{ ZJWpb
this("",0); &'k(v(>n,
} B6&[_cht
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public FileAccessI(String sName,long nPos) throws IOException Heh&;c
{ Jy}~ZY
oSavedFile = new RandomAccessFile(sName,"rw"); h9m|f|cH
this.nPos = nPos; c"kB @P
oSavedFile.seek(nPos); %>+lr%B
} "Ua-7Q&A
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public synchronized int write(byte[] b,int nStart,int nLen) j~\FDcG*ed
{ H?;+C/-K`_
int n = -1; dpS@:
try{ >H;m[
oSavedFile.write(b,nStart,nLen); tx[;& ;
n = nLen; _I; hM
} |G/WS0
catch(IOException e) 8T88
{ O2"5\@HfE
e.printStackTrace (); "w3%BbI x
} ]EqwDw4
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return n; r*9*xZ>8u
} 2=uwGIF
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} 4))N(m%3F
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/* |!{ Y:f;
**SiteInfoBean.java `N8t2yF
*/ }VeE4-p B
package NetFox; c&C*'c-r
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public class SiteInfoBean { Z?u}?-b1\H
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private String sSiteURL; //Site's URL I>{o]^xw-D
private String sFilePath; //Saved File's Path U7HfDDh
private String sFileName; //Saved File's Name +QP(ATdM
private int nSplitter; //Count of Splited Downloading File oSIP{lfp2Q
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public SiteInfoBean() 2}15FXgN
{//nSplitter的缺省值为5 '3?-o|v@D
//default value of nSplitter is 5 nf1O8FwRb
this("","","",5); wV-9T*QrM
} <!F".9c@A
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) !,]2.:{0z
{ c#TV2@
sSiteURL= sURL; U9jdb9 |
sFilePath = sPath; {.ypZ8JU
sFileName = sName; (__$YQ-
this.nSplitter = nSpiltter; {vdY(
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} d:"7Tw2v+
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public String getSSiteURL() M4(57b[`
{ (I/iD.A
return sSiteURL; ]-_ ma
} "z*.Bk
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public void setSSiteURL(String value) E1SWZ&';
{ uh`5:V
sSiteURL = value; Swh\^/B8
} E\TWPV'/
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public String getSFilePath() <KfR)7I$0a
{ ?d+ri
return sFilePath; [5tvdW6Z&
} c\/-*OYr<
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public void setSFilePath(String value)
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{ Ve${g`7&
sFilePath = value; a,(nf1@5
}
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public String getSFileName() [XttT
{ (H"{r
return sFileName;
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} $41<ldJ
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public void setSFileName(String value) &xA>(|a\&-
{ vxOnv8(
sFileName = value; (E7"GJ
} &nwS7n1eb
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public int getNSplitter() EV-sEl8ki
{ _>BYUPY
return nSplitter; bDudETl
} q%QvBN
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public void setNSplitter(int nCount) ^M%P43
{ ?PqkC&o[q
nSplitter = nCount; ZjY,k
} ^$}O?y7O
} v_Df+
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/* &-{%G=5~e%
**Utility.java _>n)HG
*/ X)6 G :cD
package NetFox; %hN(79:g
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public class Utility { h Ypj
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public Utility() 60]VOQku
{ ju3@F8AI
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} (n8?+GCa
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//线程睡眠 G[]%1
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public static void sleep(int nSecond) Dt> tTU 6
{ A,t g268
try{ 'jMs&
Thread.sleep(nSecond); f3qR7%X?
} 7w" !"W#
catch(Exception e) H ?9Bo!
{ 5'+g[eNyBV
e.printStackTrace (); 5._QI/d)'J
} R-dv$z0
} ,jeHL@>w[
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//日志 7Hv6>z#m
public static void log(String sMsg) jD"nEp-
{ d}fd^x/
System.err.println(sMsg); @BjB
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} H.]V-|U
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public static void log(int sMsg) VyNF)$'T
{ Oi& 9FS
System.err.println(sMsg); @
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} FN/l/OSb
} Z.Z31yF:f
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/*
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**TestMethod.java %%n&z6w