/* te-xhJ&K
**SiteFileFetch.java !>> A@3
*/ .ZF%$H
package NetFox; \{:A&X~\!
import java.io.*; jDb\4QyC
import java.net.*; 7WS$fUBi
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public class SiteFileFetch extends Thread { tt?`,G.(]
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SiteInfoBean siteInfoBean = null; //文件信息Bean JS^DyBXc
long[] nStartPos; //开始位置 G`O*AQ}[
long[] nEndPos; //结束位置 rP7
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 c86KDEF
long nFileLength; //文件长度 uq s
boolean bFirst = true; //是否第一次取文件 !' ^l}K>
boolean bStop = false; //停止标志 4jebx
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File tmpFile; //文件下载的临时信息 k-=lt\?
DataOutputStream output; //输出到文件的输出流 6R<+_e+v
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \z.bORy
public SiteFileFetch(SiteInfoBean bean) throws IOException ~:7y!=8#
{ A)"L+Yu5
siteInfoBean = bean; Dh2Cj-|
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); U52V1b
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); z~vcwiYAP
if(tmpFile.exists ()) GWuKDq
{ G)I`
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bFirst = false; }6-olVg
read_nPos(); m8{8r>6*
} N s0,Z#Z+
else ,H+Y1N4W(
{ U[x$QG6 m!
nStartPos = new long[bean.getNSplitter()]; mN]WjfII
nEndPos = new long[bean.getNSplitter()]; XN Uw
} tdxzs_V,-
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} Jk(V ]
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public void run() aUEr& $
{ AH&RabH2
//获得文件长度 uthW
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//分割文件 AE~a=e\x
//实例FileSplitterFetch i8e*9;4@
//启动FileSplitterFetch线程 T{Xd >
//等待子线程返回 P1rjF:x[*
try{ Pz0MafF|T
if(bFirst) 2kVZlt'y
{ P'tXG
nFileLength = getFileSize(); \DujF>:
if(nFileLength == -1) UU>+ b:
{ tNr'@ls
System.err.println("File Length is not known!"); cdL]s^z
} /g+-{+sx
else if(nFileLength == -2) U$gR}8\e
{ o|h=M/
System.err.println("File is not access!"); oFP8s[B
} ugTsI~aE
else (+(@P*c1
{ ?ld&}|W~
for(int i=0;i<nStartPos.length;i++) YT+b{
{ a_P|KRl
nStartPos = (long)(i*(nFileLength/nStartPos.length)); >"!ScYn
} 0}e?hbF%U
for(int i=0;i<nEndPos.length-1;i++) /.7RWy`
{ Pp!4Ak4TT9
nEndPos = nStartPos[i+1]; ZtO$kK%q;
} 8k-]u3
nEndPos[nEndPos.length-1] = nFileLength; e7"T37
} X$6NJ(2G
} 2T+-[}*
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//启动子线程 b;jdk w|
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $k0(iFzR1
for(int i=0;i<nStartPos.length;i++) H;\C7w|
{ q,)V0Ffe[|
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V5ZC2H
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), I9G^T' W
nStartPos,nEndPos,i); tIDN~[1
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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fileSplitterFetch.start(); $T3_~7N
} xgcJEox!
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !i-t6f
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); LcvczST
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", C `_/aR6
nEndPos = " + nFileLength); 9F[3B`w
// fileSplitterFetch[nPos.length-1].start(); Hh;lT
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//等待子线程结束 I{dy,\p
//int count = 0; j36YIz$a
//是否结束while循环 cX
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boolean breakWhile = false; GgY8\>u
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while(!bStop) c|.te]!ds
{ rmA?Xlh\
write_nPos(); d*{Cv2A.
Utility.sleep(500); <!RkkU&
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breakWhile = true; Qb?a[[3
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for(int i=0;i<nStartPos.length;i++) N8Rq7i3F?a
{ FtyT:=Kpc
if(!fileSplitterFetch.bDownOver) N2s"$Ttq
{ mM&P&mz/D
breakWhile = false; :a/rwZ[r
break; 13F]7l-#
} @Nsn0-B?ne
} (n7xYGfYS
if(breakWhile) 8%B_nVc
break; 9R8q+2
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//count++; r]cq|Nv8:
//if(count>4) d)-ZL*o
// siteStop(); E{ c+`>CY
} HL"c yxe
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System.err.println("文件下载结束!"); JR]elRR
} $7AsMlq[(
catch(Exception e){e.printStackTrace ();}
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} n~yHt/T
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//获得文件长度 :1 qLRr
public long getFileSize() K!CVS7
{ 5B:"$vC{=
int nFileLength = -1; 3v_j*wy
try{ /Q@4HV
URL url = new URL(siteInfoBean.getSSiteURL()); eG(YORkR
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /~'C!so[v
httpConnection.setRequestProperty("User-Agent","NetFox"); r~T!$Tb
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int responseCode=httpConnection.getResponseCode(); ]'xci"qV`
if(responseCode>=400) gBV4IQ
{ GEy7Vb)
processErrorCode(responseCode); %!Eh9C*
return -2; //-2 represent access is error \wz^Z{U
} IQ\!wWKmY
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String sHeader;
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for(int i=1;;i++) A<c<!N
{ ktqFgU#rT
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); JmCHwyUK?
//Utility.log(in.readLine()); ?0X$ox
sHeader=httpConnection.getHeaderFieldKey(i); @Un/,-ck
if(sHeader!=null) Ue Ci{W
{ [/hoNCH!
if(sHeader.equals("Content-Length")) zu?112-v2
{ -x6_HibbD
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [x7Rq_^
break; gnN>Rl
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} !U@ETo
} NqF*hat
else KtAEM;g
break; *bpN!2
} moFrNcso
} Jk}3c>^D
catch(IOException e){e.printStackTrace ();} ?&:N|cltD
catch(Exception e){e.printStackTrace ();} I\1E=6"
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Utility.log(nFileLength); -n"f>c_{>
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return nFileLength; :K~@JlJd
} R-pON4D"*
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//保存下载信息(文件指针位置) zZ-/S~l
private void write_nPos() aO1.9!<v
{ 8HLL3H0
try{ T$MXsq
output = new DataOutputStream(new FileOutputStream(tmpFile)); OcF_x/#
output.writeInt(nStartPos.length); |g{50r'=
for(int i=0;i<nStartPos.length;i++) J ##a;6@
{ Y_]y :H
// output.writeLong(nPos); h/C{
output.writeLong(fileSplitterFetch.nStartPos); 5KB Z-,
output.writeLong(fileSplitterFetch.nEndPos); nWCJY:q;5
} /z^v%l
output.close(); th*!EFA^o
} vh2/d.MO
catch(IOException e){e.printStackTrace ();} Yqh-U%"'
catch(Exception e){e.printStackTrace ();} :I?lT2+ea
} *j(fk[,i
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//读取保存的下载信息(文件指针位置) ;FwUUKj
private void read_nPos() CaCApL
{ `Qb!W45
try{ )2E vZn
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;/Y#ph[
int nCount = input.readInt(); kygj" @EX
nStartPos = new long[nCount]; T@vE@D
nEndPos = new long[nCount]; B7C<;`5TiD
for(int i=0;i<nStartPos.length;i++) ?8grK
{ :twp95{R1
nStartPos = input.readLong(); ^0_ >
nEndPos = input.readLong(); p\~ a=
} )ty>{t
input.close(); h{HpI
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} k:/Z6TLk3
catch(IOException e){e.printStackTrace ();} h;E.y
catch(Exception e){e.printStackTrace ();} 76[qFz
} o}waJN`yI
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private void processErrorCode(int nErrorCode) nY;Sk#9
{ 5<GeAW8ns]
System.err.println("Error Code : " + nErrorCode); O
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} ,%/F,O+#
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//停止文件下载 +{6:]
public void siteStop()
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{ p{qA%D
bStop = true; @CR<&^s5V
for(int i=0;i<nStartPos.length;i++) ?:GrM!kq76
fileSplitterFetch.splitterStop(); -*&aE~Cs
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} XOS^&;
} n~>b}DY
//负责部分文件的抓取 U\{I09@E 0
**FileSplitterFetch.java 0:`YY8j1k
*/ es69P)
package NetFox; " E5=AWd
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import java.io.*; #EKnjh=Uq
import java.net.*; e=jtF"&
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public class FileSplitterFetch extends Thread { C_[
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String sURL; //File URL ze+S_{
long nStartPos; //File Snippet Start Position #\ ="^z6
long nEndPos; //File Snippet End Position lzFg(Ds!f
int nThreadID; //Thread's ID }]=A:*jD
boolean bDownOver = false; //Downing is over V~.SgbLc
boolean bStop = false; //Stop identical \Ym$to
FileAccessI fileAccessI = null; //File Access interface 0^2e^qf
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException f~jdN~
{ s!Id55R]
this.sURL = sURL; 3!?QQT,!)
this.nStartPos = nStart; x )q$.u+
this.nEndPos = nEnd; ](ztb)
nThreadID = id; Mns=X)/hc
fileAccessI = new FileAccessI(sName,nStartPos);//定位 E[CvxVCx
} KJ-Q$
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public void run() N'5DB[:c:
{ RzB64
while(nStartPos < nEndPos && !bStop) *:l$ud
{ #s}tH$MT#
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try{ &t@ $]m(
URL url = new URL(sURL); eEmLl(Lb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -42 U
httpConnection.setRequestProperty("User-Agent","NetFox"); !P6y_Frpe
String sProperty = "bytes="+nStartPos+"-"; ri9n.-xs
httpConnection.setRequestProperty("RANGE",sProperty); Eh`W J~
Utility.log(sProperty); M9yqJPS}B
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InputStream input = httpConnection.getInputStream(); ws]d,]
//logResponseHead(httpConnection); BIvz55g
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byte[] b = new byte[1024]; 127@
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int nRead; QX-M'ur99
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ~vR<UQz
{ ;ZrFy=Iv
nStartPos += fileAccessI.write(b,0,nRead); 5kv]k?
//if(nThreadID == 1) (ubK
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P_@ty~u
} M?$tHA~OX
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Utility.log("Thread " + nThreadID + " is over!"); *EtC4sP
bDownOver = true; Gg7ZSB 7
//nPos = fileAccessI.write (b,0,nRead); aUBu"P$J
} `\-MpNw
catch(Exception e){e.printStackTrace ();} 6z67%U*8r
} KkHlMwv
} 1[dQVJqMp(
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//打印回应的头信息 YGq-AB
public void logResponseHead(HttpURLConnection con) tkix@Q!;\
{ _..5G7%#%
for(int i=1;;i++) l?beqw:
{ Cmj `WSSa
String header=con.getHeaderFieldKey(i); 'ka"0~:NS{
if(header!=null) z<<aT
//responseHeaders.put(header,httpConnection.getHeaderField(header)); fli7Ow?M~
Utility.log(header+" : "+con.getHeaderField(header)); l}Vg;"1'J
else gE!`9 #..
break; |VoYFoiQ
} =u&NdMy
} W!Rr_'yFe)
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public void splitterStop() 0k|/]zfb
{ *;(GL
bStop = true; v\COl*
} xm<sH!,j
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} 5z:/d `P[
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/* Yf^/YLLS
**FileAccess.java O[')[uo8s
*//文件访问(定位,写) gq?~*4H
package NetFox; >z8y L+
import java.io.*; }(if|skau
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public class FileAccessI implements Serializable{ C;!h4l7L
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 <Xj
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RandomAccessFile oSavedFile; Aq P\g k
long nPos; l_*:StyR+
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public FileAccessI() throws IOException s}Sxl0
{ x1*@PiO,.
this("",0); Z{.L_]$I
} \U'TL_Ql
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public FileAccessI(String sName,long nPos) throws IOException }\\6"90g*
{ T]J#>LBd
oSavedFile = new RandomAccessFile(sName,"rw"); zzBq b\Ky
this.nPos = nPos; JYWc3o6
oSavedFile.seek(nPos); A,#hYi=-,
} zn{[]J
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public synchronized int write(byte[] b,int nStart,int nLen) ('pxX+
{ pDx}~IB
int n = -1; z'}?mE3i
try{ p}swJ;S
oSavedFile.write(b,nStart,nLen); NBZ>xp[U
n = nLen; > 'KQL?!F
} >pl*2M&
catch(IOException e) h?:Y\DlU'
{ _A/ ]m4
e.printStackTrace (); k-vxKrjZ/
} ;R?9|:7
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return n; 4)nQBFX
} @'!61'}f
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} >taZw'
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/* 5Gsj;
**SiteInfoBean.java R OQIw
*/ QcQ|,lA.HI
package NetFox; ;EfMTI}6K
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public class SiteInfoBean { 7u^6`P
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private String sSiteURL; //Site's URL !kfnqe?|
private String sFilePath; //Saved File's Path [}_ar
private String sFileName; //Saved File's Name 7e"(]NC84
private int nSplitter; //Count of Splited Downloading File uQ.VW/>
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public SiteInfoBean() Fk,3th
{//nSplitter的缺省值为5 #B)`dA0a
//default value of nSplitter is 5 tgYIM`f
this("","","",5); l9.wMs*`X
} ),6Z1 K1
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &WHEP dD
{ 6%_d m'
sSiteURL= sURL; 0\U28zbMJw
sFilePath = sPath; 3^us;aOr
sFileName = sName; qO9_e
this.nSplitter = nSpiltter; <`9:hPp0
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} h OboM3_
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public String getSSiteURL() q+o(`N'~G
{ MU&5&)m
return sSiteURL; "v3u$-xN1
} aV(*BE/@F
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public void setSSiteURL(String value) ^HL#)fK2I
{ XfsCu>
sSiteURL = value; X>|.BvY|
} .[Sv|;x"E
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public String getSFilePath() 1
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{ Z?hBn`.
return sFilePath; 3G8uXB_`}
} ._tv$Gd@k
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public void setSFilePath(String value) $9 DZ5"
{ c/2OR#$t
sFilePath = value; km<~Hw>Z
} xHr
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public String getSFileName() sq)Nn&5A
{ sX_ ^H%fd
return sFileName; !P92e1
} Cm;N5i
iy: ;g
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public void setSFileName(String value) m&A/IW,.
{ |k+&weuY
sFileName = value; T8hQ< \g
} BkqIfV%O
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public int getNSplitter() |_=jXf\TL
{ zPkg3H
return nSplitter; !s)$_tG
} 329xo03-[
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public void setNSplitter(int nCount) v}Aw!Dv/
{ G+g`=7
nSplitter = nCount; Ixec]UOS
} }5] s+m
} .D>lv_kp
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/* MK[spV
**Utility.java =0]Mc$Ih
*/ [
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package NetFox; /w!' [
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public class Utility { ~!nd'{{9
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public Utility() i ('EBO
{ ?\pE#~m
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} BxT~1SBFq
!KlSw,&=.6
//线程睡眠 x> q3w# B
public static void sleep(int nSecond) 0Its;|
{ +8Px` v1L
try{ q7PRJX
Thread.sleep(nSecond); aKUr":z
} zg
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catch(Exception e) Ni)#tz_9
{ Zn} )&Xt
e.printStackTrace (); ]`kvq0Gyb
} }n7e_qy4
} i|O7nB@
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//日志 7w$R-Y/E
public static void log(String sMsg) lKD@2
{ Uy1xNb/d
System.err.println(sMsg); [O)Zof
} ;VH]TKkk
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public static void log(int sMsg) g|HrhUT;
{ PmY:sJ{M
System.err.println(sMsg); E9:hK
} bOdv]nQ1
} %Uk/P
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/* $"(YE #]|
**TestMethod.java }:8>>lQ
*/ Q(IS=
package NetFox; D6oby*_w
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public class TestMethod { -:>#w`H
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