/* W+\?~L.
**SiteFileFetch.java uFo/s&6K
*/ nE$
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package NetFox; Zw#<E
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import java.io.*; 8SZK:VE@
import java.net.*; A?r^V2+j
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public class SiteFileFetch extends Thread { tF%QH[
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SiteInfoBean siteInfoBean = null; //文件信息Bean #)]E8=}
long[] nStartPos; //开始位置 Kp&3=e;vn{
long[] nEndPos; //结束位置 #w|5jN?
FileSplitterFetch[] fileSplitterFetch; //子线程对象 MMd.0JuaO
long nFileLength; //文件长度 V&iS~V0.
boolean bFirst = true; //是否第一次取文件 P#;Th8k{K2
boolean bStop = false; //停止标志 96}eR,
File tmpFile; //文件下载的临时信息 o0mJy'
DataOutputStream output; //输出到文件的输出流 (A4&k{C_
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) NbkK&bz
public SiteFileFetch(SiteInfoBean bean) throws IOException (:7a&2/M
{ jT-<IJh!o
siteInfoBean = bean; oj@g2H5P
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); w.^yP7:
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Sc_5FX\Yx
if(tmpFile.exists ()) `tVy_/3(9
{ :c:V%0Yji
bFirst = false; ;_N5>3C:
read_nPos(); Z0\Iyc G
} (f>M &..
else bo>E"<
{ s[X
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nStartPos = new long[bean.getNSplitter()]; $r15gfne>
nEndPos = new long[bean.getNSplitter()]; 30d#Lq
} Z&Pu8zG
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} 5v|EAjB6o
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public void run() pkk4h2Ah
{ 'RLOV
//获得文件长度 $^h?:L:1n
//分割文件 QBihpA1;
//实例FileSplitterFetch n&d/?aJ7a\
//启动FileSplitterFetch线程 5@f5S0 Y
//等待子线程返回 l"\uf(0K
try{ {[^#h|U
if(bFirst) <5IQc[3]aP
{ p6[ (81
nFileLength = getFileSize(); A[JM4x
if(nFileLength == -1) kEP<[K
{ E9$H nj+m
System.err.println("File Length is not known!"); J-XTN"O
} G~!C=l
else if(nFileLength == -2) @i1q]0
{ UA(;fZ@
System.err.println("File is not access!"); Y[G9Vok
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} 8zmv
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else 4ZI_pf
{ nk/vGa4
for(int i=0;i<nStartPos.length;i++) %5Rq1 $D
{ 8Q(8b@ZO,
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6+PGwCS
} Gru ALx7
for(int i=0;i<nEndPos.length-1;i++) '[fZt#
{ RL&lKHA
nEndPos = nStartPos[i+1]; XTo8,'UaP
} ~:Mm<*lL%
nEndPos[nEndPos.length-1] = nFileLength; HJ@5B"
} vGN3 YcH
} %wL,v.}
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//启动子线程 (.Xr#;\(
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Z %EQt
for(int i=0;i<nStartPos.length;i++) #{,h@g}W
{ ~ 5"J(
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ipZHSA
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 784;]wdy\
nStartPos,nEndPos,i); f:vD`Fz1
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); sFElD
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fileSplitterFetch.start(); *P xf#X
}
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H\+-cvl
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @T7PZB&xnl
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [H^ X"D
nEndPos = " + nFileLength); 968^ "T#
// fileSplitterFetch[nPos.length-1].start(); 9h&yuS'Yj
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//等待子线程结束 7\%$>< K
//int count = 0; W~NYU
//是否结束while循环 MaErx\
boolean breakWhile = false; P)1EA;
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while(!bStop) Qlh?iA
{ xb`CdtG2.
write_nPos(); |yv]Y/=
Utility.sleep(500); O`(U/?
breakWhile = true; =4> @8=JA
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}
for(int i=0;i<nStartPos.length;i++) 6b#~;
{ P`
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if(!fileSplitterFetch.bDownOver) oHsP?%U
{ hr~.Lj5^W
breakWhile = false; Cuv|6t75'
break; q+%!<]7X
} sam[s4@eQ
} WZK
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if(breakWhile) Z =
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break; ,`)OEI|1d
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//count++; vJThU$s-
//if(count>4) e~
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// siteStop(); 7LdzZS0OM
} K?YEoz'y[
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System.err.println("文件下载结束!"); b9#m m
} 0_HJ.g!
catch(Exception e){e.printStackTrace ();} BA*&N>a
} :D4];d>1
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//获得文件长度 %omu
public long getFileSize() :`5;nl63
{ r\RFDj
int nFileLength = -1; 453
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try{ D 2$^"
URL url = new URL(siteInfoBean.getSSiteURL()); mtX31M4
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y($EK(cb
httpConnection.setRequestProperty("User-Agent","NetFox"); wPQ&Di*X}
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int responseCode=httpConnection.getResponseCode();
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if(responseCode>=400) oN ;-M-(
{ Hh\
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processErrorCode(responseCode); ?sE@]]z
return -2; //-2 represent access is error W1`Dx(g
} 4znH$M>bU
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String sHeader; yWmrdvL
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for(int i=1;;i++) Wt"ww~h`(
{ Q-3r}jJe
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); T?#s'd
//Utility.log(in.readLine()); LS{bg.e
sHeader=httpConnection.getHeaderFieldKey(i); 3l$E8?[Zwi
if(sHeader!=null) gY%OhYtF2
{
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if(sHeader.equals("Content-Length")) "&Gw1.p
{ #)FDl70S8
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @Jm.HST#S8
break; J ZA*{n2
} 'H!V54
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} !"`Jqs
else aU4R+.M7@
break; ^glX1 )
} m^'~&!ba
} rykj2/O
catch(IOException e){e.printStackTrace ();} f&f`J/(
catch(Exception e){e.printStackTrace ();} %pH)paRAP
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Utility.log(nFileLength); Etw~*
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return nFileLength; D/e&7^iK
} 40R"^*
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//保存下载信息(文件指针位置) :MK:TJV
private void write_nPos() >B`Cch/'U
{ hI*`> 9l
try{ 8~;{xYN )
output = new DataOutputStream(new FileOutputStream(tmpFile)); U&`6&$]
output.writeInt(nStartPos.length); hH#lTye
for(int i=0;i<nStartPos.length;i++) eU`;L[
{ )4@M`8
// output.writeLong(nPos); q)NXyy4BT
output.writeLong(fileSplitterFetch.nStartPos); =[ s8q2V
output.writeLong(fileSplitterFetch.nEndPos); *3!(*F@M,
} EN)YoVk
output.close(); NWw<B3aL
} 04P.p6
catch(IOException e){e.printStackTrace ();} K*TnUQ
catch(Exception e){e.printStackTrace ();} C?8PT/
} O5ucI$s
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//读取保存的下载信息(文件指针位置) *@CVYJ'<
private void read_nPos() !&qx7eOSpP
{ +d.u##$
try{ Rk}\)r\
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W&HF?w}s
int nCount = input.readInt(); ,<7"K&
nStartPos = new long[nCount]; f+{c1fb>s
nEndPos = new long[nCount]; qi(&8in
for(int i=0;i<nStartPos.length;i++) {F<)z%^
{ \)FeuLGL9
nStartPos = input.readLong(); t-'I`I
nEndPos = input.readLong(); Tnf&pu#5
} yZ?xt'tn
input.close(); :8](&B68gE
} pTc$+Z73
catch(IOException e){e.printStackTrace ();} { k
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catch(Exception e){e.printStackTrace ();} eVJ= .?r
} CR%D\I$o
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private void processErrorCode(int nErrorCode) lq;
{ d&/^34gn
System.err.println("Error Code : " + nErrorCode); 3X,]=f@_
} ue,#,3{m
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//停止文件下载 `)0Rv|?
public void siteStop() 1[26w_B3
{ kEp.0wL'
bStop = true; ,h3269$J
for(int i=0;i<nStartPos.length;i++) H|grbTv,
fileSplitterFetch.splitterStop(); eV"d v*R
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} ev~dsk6k
} 6XQ*:N/4al
//负责部分文件的抓取 D=jSh
**FileSplitterFetch.java q>Q:X3
*/ 8:Z@ lp^
package NetFox; <8}KEe4
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import java.io.*; pem3G5
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import java.net.*; ZC3tbhV
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public class FileSplitterFetch extends Thread { hB|H9+
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String sURL; //File URL +AE&GU
long nStartPos; //File Snippet Start Position Gg
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long nEndPos; //File Snippet End Position UN
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int nThreadID; //Thread's ID `,F&y{A
boolean bDownOver = false; //Downing is over Q%M'[L?[
boolean bStop = false; //Stop identical BP )q6?Mz
FileAccessI fileAccessI = null; //File Access interface k98< s
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bBkm]
>
{ [W^6u7~
this.sURL = sURL; (|yRo
this.nStartPos = nStart; '5|Q<5!o
this.nEndPos = nEnd; LydbP17K}
nThreadID = id; &"U9X"8b
fileAccessI = new FileAccessI(sName,nStartPos);//定位 />dB%*
} kx"hWG4
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public void run() P<j4\zJ
{ {]t\`fjrg
while(nStartPos < nEndPos && !bStop) 5~ _eN
{ SREDM
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try{ W~XV
URL url = new URL(sURL); blKDQ~T2
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c,v^A+sZu
httpConnection.setRequestProperty("User-Agent","NetFox"); =yk Rki
String sProperty = "bytes="+nStartPos+"-"; QLn5#x~xb
httpConnection.setRequestProperty("RANGE",sProperty); )bB"12Z|8
Utility.log(sProperty); }<(
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InputStream input = httpConnection.getInputStream(); {
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//logResponseHead(httpConnection); }aHB$}"!
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byte[] b = new byte[1024]; ?6gDbE%
int nRead; 2]of SdM
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) P.[6s$J
{ "4Vi=* 2V
nStartPos += fileAccessI.write(b,0,nRead); z")3_5Br
//if(nThreadID == 1) ifJv~asp
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .c=$ bQ>^
} WL
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Utility.log("Thread " + nThreadID + " is over!"); 7AGZu?1]M
bDownOver = true; [M7iJcwt
//nPos = fileAccessI.write (b,0,nRead); rQd1Ch
} tMD^$E"C
catch(Exception e){e.printStackTrace ();} 6i9Q,4~
} fd!pM4"0
} OBKC$e6I
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//打印回应的头信息 |kBg8).B
public void logResponseHead(HttpURLConnection con) EO o'a
{ sUyCAKebRr
for(int i=1;;i++) mFgb_Cd
{ C,OB3y
String header=con.getHeaderFieldKey(i); z. _C*c
if(header!=null) c"f-$^<
//responseHeaders.put(header,httpConnection.getHeaderField(header)); K%[}[.cW
Utility.log(header+" : "+con.getHeaderField(header)); r
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else ~WYE"(
break; a>)_ `m
} {|Mxvp*Hg
} V:,3OLL*
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public void splitterStop() tK s4}vW
{ Gg}LC+Y
bStop = true; UijuJ(Tle
} bOdsMlJkN
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} Ru9pb~K
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/* DMK"Q#Vw
**FileAccess.java %~B)~|h
*//文件访问(定位,写) hZss
package NetFox; 4Rrw8Bw
import java.io.*; BZ\EqB
*mK);@pL
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public class FileAccessI implements Serializable{ 8eS@<[[F#
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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 $:-= >
RandomAccessFile oSavedFile; ',J%Mv>Yf
long nPos; eHnei F
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public FileAccessI() throws IOException My6]k?;}(
{ yN WbI0a
this("",0); 1CS]~1Yp:
} Op$J"R
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public FileAccessI(String sName,long nPos) throws IOException gE6y&a
{ JI[rIL\Ey
oSavedFile = new RandomAccessFile(sName,"rw"); 9TXm Z
this.nPos = nPos; {C0OrO2:
oSavedFile.seek(nPos);
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} !3X%5=#L4
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public synchronized int write(byte[] b,int nStart,int nLen) whg4o|p
{ )H37a
int n = -1; Med"dHo7
try{ lA^Kh
oSavedFile.write(b,nStart,nLen); k`4\.m"&
n = nLen; |z<wPJ,;2
} 7N~qg 7&
catch(IOException e) B|q3;P
{ -I$txa/"|
e.printStackTrace (); <GFB'`L
} - m x3^
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return n; C;:1CK
} fPk9(X;G!p
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} &LxzAL,3!
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/* ;Q,).@<C
**SiteInfoBean.java j
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*/ 4oaP"T@6
package NetFox; "y
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public class SiteInfoBean { \3Ald.EqtM
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private String sSiteURL; //Site's URL h}:5hi Jw
private String sFilePath; //Saved File's Path +&zuI
private String sFileName; //Saved File's Name K'rs9v"K|
private int nSplitter; //Count of Splited Downloading File [t=+$pf(-
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public SiteInfoBean() 8Carg~T@
{//nSplitter的缺省值为5 ^l2d?v8
//default value of nSplitter is 5 d=OO(sf
this("","","",5); Hr,gV2n
} 4y}a,
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) *M!YQ<7G^d
{ ^EBM;&;7
sSiteURL= sURL; 6o23#JgN
sFilePath = sPath; 3)MM5
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sFileName = sName; "N:]d*A\
this.nSplitter = nSpiltter; 7ofH@U
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} <EN[s
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public String getSSiteURL() [&kk
{ #K*q(ei,7h
return sSiteURL; m<LzB_G\
} gY^TBR0?m
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public void setSSiteURL(String value) {j4:.fD
{ krY.Cc]
sSiteURL = value; \J
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} F7u%oLjr
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public String getSFilePath() ]1$AAmQH
{ x(6.W"-S
return sFilePath; JV{!Ukuyp+
} /FZ )ej\
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public void setSFilePath(String value) ebwoMG,B-
{ I,Y^_(JW
sFilePath = value; QN5N hs
} 0`zq*OQ
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public String getSFileName() Ybiz]1d
{ J, U~.c
return sFileName; .tZ$a_O
} !Bbwl-e`
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public void setSFileName(String value) 4B>|Wft{p]
{ Lh$ac-Ct
sFileName = value; 0n^j 50Yq
}
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public int getNSplitter() vxZUtyJfe
{ ;8kfgpM_
return nSplitter; o: DnZN
} I#e*,#'S
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public void setNSplitter(int nCount) +6E<+-N
{ h"m7r4f
nSplitter = nCount; 'm((G4
} ;:1mv
} @isqFKjph
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/* ZXkAw sr
**Utility.java Stx-(Kfn4
*/ 5lY9
package NetFox; ^jC0S[csw2
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public class Utility { k{8N@&D
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public Utility() |a3b2x,
{ ?!vW&KJZx
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} }DwXs` M7
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//线程睡眠 Fv
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public static void sleep(int nSecond) }]) f^
{ CiFbk&-g
try{ v]sGdZ(6-
Thread.sleep(nSecond); O^hV<+CX
} %J'_c|EQM
catch(Exception e) c Ix(;[U
{ O%{>Zo_<