/* ;g0Q_F@;p
**SiteFileFetch.java B$eM
*/ )p\`H;7*V4
package NetFox; {A0jkU
import java.io.*; J!uG/Us
import java.net.*; "ko*-FrQ
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#
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public class SiteFileFetch extends Thread { f24W*#IX
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SiteInfoBean siteInfoBean = null; //文件信息Bean ?b]zsku8
long[] nStartPos; //开始位置 xMjhC;i{
long[] nEndPos; //结束位置 <_YdN)x
FileSplitterFetch[] fileSplitterFetch; //子线程对象 u7< +)6-
long nFileLength; //文件长度 D$}hoM1
boolean bFirst = true; //是否第一次取文件 X30tO>
boolean bStop = false; //停止标志 }~
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File tmpFile; //文件下载的临时信息 qp})4XT v
DataOutputStream output; //输出到文件的输出流 &-=~8
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Cqr{Nssu
public SiteFileFetch(SiteInfoBean bean) throws IOException cq
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{
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siteInfoBean = bean; N~!,
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); t"VT['8
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); hEZvi
if(tmpFile.exists ()) *K/K97
{ 5iA>Z!sP[
bFirst = false; 50_[hC&C)
read_nPos(); l
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} IC
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else cGV%=N^BE<
{ KQfWpHwfj
nStartPos = new long[bean.getNSplitter()]; )>ZT{eF
nEndPos = new long[bean.getNSplitter()]; n41#
} d5'Q1"{
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} o/{`\4
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public void run() Z<X=00,wg
{ eK7A8\;e
//获得文件长度 #*iUZo
//分割文件 ~0PzRS^o
//实例FileSplitterFetch >$m<R&
//启动FileSplitterFetch线程 VIF43/>(
//等待子线程返回 U"GxXrl
try{ KrGl}|
if(bFirst) wpZ"B+oK!
{ 1M`E.Ztw*
nFileLength = getFileSize(); Ch"wp/[
if(nFileLength == -1) Ow;thNN
{ UT3Fi@
System.err.println("File Length is not known!"); 8eB,$;i
} ljbAfd
else if(nFileLength == -2) c,1 G+.
{ };'@'
System.err.println("File is not access!"); \TP$2i%W
} %+'Ex]B
else 2K:A4)jZ
{ IHEbT
for(int i=0;i<nStartPos.length;i++) tX^6R
{ ]aPf-O*
nStartPos = (long)(i*(nFileLength/nStartPos.length)); do8[wej<:
} /r7xA}se^
for(int i=0;i<nEndPos.length-1;i++) ?}Zo~]7E
{ 89M'klZ
nEndPos = nStartPos[i+1]; =`+D/
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} yr%[IX]R
nEndPos[nEndPos.length-1] = nFileLength; .)/."V
} m7k }k)
} dXTD8 )&
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//启动子线程 V*n$$-5
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; wNmpUO ?
for(int i=0;i<nStartPos.length;i++) ]gBnzh.
{
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h3`}{
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *O[/KR%
nStartPos,nEndPos,i); B?BOAH
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UNDl&C2vz
fileSplitterFetch.start(); p$,G`'l
} }# s{."
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Rw'}>?k]
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8&EJ.CQ
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ZLzc\>QX
nEndPos = " + nFileLength); [63\2{_^v
// fileSplitterFetch[nPos.length-1].start(); 4. R(`#f
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//等待子线程结束 1{N+B#*<[X
//int count = 0; .2%t3ul[
//是否结束while循环 =AO
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boolean breakWhile = false; O|t>.<T?
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while(!bStop) D?dBm
{ !H\;X`W|~D
write_nPos(); 1 iox0
Utility.sleep(500); 3@" :&
breakWhile = true; M-t9M~
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for(int i=0;i<nStartPos.length;i++) Pm%xX~H
{ /0\g!29l<
if(!fileSplitterFetch.bDownOver) ~u%$ 9IhM
{ 3zB'AG3b
breakWhile = false; WVR/0l&bU
break; ~HIj+kN
} [7}3k?42X
} {dxFd-K3
if(breakWhile) tMw65Xei6b
break; U5C]zswL
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//count++; E_~e/y"-
//if(count>4) CT'4.
// siteStop(); XYvj3+
}
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System.err.println("文件下载结束!"); M d4Q.8
} ?EC\.{
catch(Exception e){e.printStackTrace ();} ;~0q23{+;U
} (9`dLw5
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//获得文件长度 C`r:jA<LC,
public long getFileSize() LM eI[Ji
{ ^mLX}E]
int nFileLength = -1; rCF=m]1zxT
try{ g)6>=Qo`8E
URL url = new URL(siteInfoBean.getSSiteURL()); (2eS:1+'8
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z7bJ<TpZ
httpConnection.setRequestProperty("User-Agent","NetFox"); ZP~H!
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int responseCode=httpConnection.getResponseCode(); E#_/#J]UQn
if(responseCode>=400) no8\Oees
{ "_&ZRcd*
processErrorCode(responseCode); Y$>NsgQn6
return -2; //-2 represent access is error <-.@,HQ+
} sl-wNIQ
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String sHeader; rG?5z"
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for(int i=1;;i++) GZi`jp
{ gM&O dT+i
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <n,QSy#
//Utility.log(in.readLine()); IoLP*D
sHeader=httpConnection.getHeaderFieldKey(i); *f 7rLM*
if(sHeader!=null) 5Xr})%L
{ .#~!w!T
if(sHeader.equals("Content-Length")) 8XYxyOl
{ "*HM8\
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :| 9vMM^$
break; ;"cQ)=s9Y
} SZT n=\
} p0W<K
else v'
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break; ;.AMP$o`(Y
} 8Ygf@*9L4
} 6:wk=#w
catch(IOException e){e.printStackTrace ();} j_5&w Znq
catch(Exception e){e.printStackTrace ();} L*4"D4V
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Utility.log(nFileLength); j*>Df2z
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return nFileLength; ;:Z5Ft m
} iT:i
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//保存下载信息(文件指针位置) 6am6'_{
private void write_nPos() wlP3 XF?
{ o@N[O^Q
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try{ _`p-^I
output = new DataOutputStream(new FileOutputStream(tmpFile)); C[.Xi
output.writeInt(nStartPos.length); C-A?
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for(int i=0;i<nStartPos.length;i++) W0MgY%Qv[
{ lv?`+tU2_
// output.writeLong(nPos); @?e~l:g})g
output.writeLong(fileSplitterFetch.nStartPos); y0Gblza
output.writeLong(fileSplitterFetch.nEndPos); c$,1j%[)
} p@O Ip
output.close(); omg#[
} 4
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catch(IOException e){e.printStackTrace ();} QOK,-
catch(Exception e){e.printStackTrace ();} >yKz8SV#
} QGI@5
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//读取保存的下载信息(文件指针位置) U]}F A2
private void read_nPos() eH7x>[lH.
{ KDb j
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try{ "Y^j=?1k
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Zoxblk
int nCount = input.readInt(); .`~?w+ ~
nStartPos = new long[nCount]; r+m.!+
nEndPos = new long[nCount]; {St-
for(int i=0;i<nStartPos.length;i++) YvN]7tcb
{ 'k]~Q{K$
nStartPos = input.readLong(); e YP^.U)
nEndPos = input.readLong(); }F0<8L6%
} = r/8~~=
input.close(); ,,G"EF0A
} ?\8
catch(IOException e){e.printStackTrace ();} I5E=Ujc_
catch(Exception e){e.printStackTrace ();} 4Cu\|"5)
} $b2~Wj*-nJ
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private void processErrorCode(int nErrorCode) 1OExa<Zq
{ g_{N^wS
System.err.println("Error Code : " + nErrorCode); 6)0.q|Q
} ;v\s 7y
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//停止文件下载 4v/MZ:%C`
public void siteStop() l!XCYg@67
{ L3HC-
bStop = true; y+k^CT/u
for(int i=0;i<nStartPos.length;i++) P<Bx1H-z-
fileSplitterFetch.splitterStop(); O>+=cg
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} awo'#Y2>
} *<S>PbqLw
//负责部分文件的抓取 , @UOj=
**FileSplitterFetch.java
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*/ I;"pPJ3G
package NetFox; Nc(CGl:
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import java.io.*; UH6 7<_mK
import java.net.*; ?2#'>B
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public class FileSplitterFetch extends Thread { VO eVS&}
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String sURL; //File URL "P#1=
long nStartPos; //File Snippet Start Position Dfzj/spFV
long nEndPos; //File Snippet End Position J)n_u) ,
int nThreadID; //Thread's ID r@C~_LgL)
boolean bDownOver = false; //Downing is over Dq~;h \='
boolean bStop = false; //Stop identical v[|W\y@H/3
FileAccessI fileAccessI = null; //File Access interface =q]!"yU[d
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException jr0j0$BF
{ d2Q*1Q@u
this.sURL = sURL; 8cOft ;|qB
this.nStartPos = nStart; 4j=K3m
this.nEndPos = nEnd; JqMF9|{H
nThreadID = id; 6Jq[]l"v
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,k~' S~w.
} N8pL2y:R[P
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public void run() CR'%=N04^
{ T4wk$R
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while(nStartPos < nEndPos && !bStop) 131(0nl)=I
{ ?[Y(JO#
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try{ [s[ZOi!;I
URL url = new URL(sURL); $4xSI"+M%
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l~;>KjZg
httpConnection.setRequestProperty("User-Agent","NetFox"); 1b1Ab
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String sProperty = "bytes="+nStartPos+"-"; xA(z/%
httpConnection.setRequestProperty("RANGE",sProperty); gm)Uyr$
Utility.log(sProperty); !5lV#w!vb
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InputStream input = httpConnection.getInputStream(); %\<b{x# G
//logResponseHead(httpConnection); h*l$!nEN
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byte[] b = new byte[1024];
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int nRead; _|GbU1Hz
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [-$
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{ WuUwd#e
nStartPos += fileAccessI.write(b,0,nRead); uRko[W(
//if(nThreadID == 1) 1`7zYW&L
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "QdK
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} To>,8E+GAb
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Utility.log("Thread " + nThreadID + " is over!"); lcZ.}
bDownOver = true; DO80HS3ZD
//nPos = fileAccessI.write (b,0,nRead); Ll|_Wd.K,
} `?Q
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catch(Exception e){e.printStackTrace ();} (|^m9v0:
} b&F9<XLqq
} CfU|]<
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//打印回应的头信息 uTR^K=Ve
public void logResponseHead(HttpURLConnection con) QnVr)4"
{ l@B9}Icq
for(int i=1;;i++) V,_m>$Mo
{ )6)bI.BY
String header=con.getHeaderFieldKey(i); pjFO0h_Y
if(header!=null) {3`385
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 4=tR_s
Utility.log(header+" : "+con.getHeaderField(header)); 'vBZh1`p
else $].htm
break; D|9+:Y
} *(Dmd$|0|
} u)0I$Tc"
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public void splitterStop() 3{3@>8{w
{ g Y~r{
bStop = true; GjhTF|
} !CYC7HeF
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} >lRZvf-i
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/* R
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**FileAccess.java U7s$';y"%
*//文件访问(定位,写) O{X~,Em=q
package NetFox; W r/-{Wt
import java.io.*; lv
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public class FileAccessI implements Serializable{ NGc~%0n
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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 o&q>[c
RandomAccessFile oSavedFile; E]`7_dG+T
long nPos; }sXTZX
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public FileAccessI() throws IOException ^AP8T8v
{ X.t4;
this("",0); Z4VFfGCTL
} @V*dF|# /
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public FileAccessI(String sName,long nPos) throws IOException B3#G
{ ! K>iSF<
oSavedFile = new RandomAccessFile(sName,"rw"); KMRPleF
this.nPos = nPos; IO+]^nY`
oSavedFile.seek(nPos); qNEp3WY:
} "bo0O7InOV
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public synchronized int write(byte[] b,int nStart,int nLen) PE%$g\#?
{ 1)(>'pY
int n = -1; -* ,CMw
try{ $O%{l.-O
oSavedFile.write(b,nStart,nLen); nYyhQX~]B
n = nLen; @RoZd?
} ^LMgOA(7
catch(IOException e) /5ZX6YkeH
{ USBQEt
e.printStackTrace (); TLdlPBnr8
} 1^\w7Rew2
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return n; /v R>.'
} ZL!u$)(V
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} &3Zq1o
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/* @tH9$J*Y<
**SiteInfoBean.java =hPXLCeC
*/ 0xB2
package NetFox; Qz~uD'Rs/
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public class SiteInfoBean { 8`q7Yss6F
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private String sSiteURL; //Site's URL 7j]v_2S`
private String sFilePath; //Saved File's Path ~e{ @ 5.g
private String sFileName; //Saved File's Name 1 R5pf
private int nSplitter; //Count of Splited Downloading File ZwmucY%3
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public SiteInfoBean() Mbi]EZ
{//nSplitter的缺省值为5 *T5;dh (
//default value of nSplitter is 5 P$)g=/td1
this("","","",5); }s}g}t8v-
} <)VgGjZ-H
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) A6&*VD
{ d#ir=+o{h
sSiteURL= sURL; !J`lA
sFilePath = sPath; ZaFt4#
sFileName = sName;
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this.nSplitter = nSpiltter; OK[J
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} ;P@]7vkff
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public String getSSiteURL() pCIzpEsRs
{ %$!3Pbui
return sSiteURL; ag=d6q
} t'qYM5
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public void setSSiteURL(String value)
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{ .w2 ID
sSiteURL = value; .Mt3ec<
} TktH28tK
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public String getSFilePath() oaoTd$/5
{ /R)wM#&
return sFilePath; >[}oH2oi
} hx;f/EPx
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public void setSFilePath(String value) Zi!Ta"}8
{ r* *zjv>
sFilePath = value; M^FY6TT4O
} c`;\sW-_W
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public String getSFileName() [M?2axOC
{ sibYJK Oy
return sFileName; ]-fkmnmWX
} %,$ n^{v
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public void setSFileName(String value) Rj8%% G-pt
{ P]_d;\
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sFileName = value; 2eT?qCxqc
} dUI5,3*
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public int getNSplitter() _X6'uJ
{ &p0e)o~Ux
return nSplitter; &d# R'Z
} 8.E"[QktZ
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public void setNSplitter(int nCount) v3tJtb^'!
{ bOS)vt*V
nSplitter = nCount; MK$u}G
} 'M90Yia
} sp9gz~Kq
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/* Q?{%c[s
**Utility.java XYE|=Tr]
*/ x0*{oP
package NetFox; M `xiC
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public class Utility { _T=g?0
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public Utility() ,Kit@`P%
{ 8`Ya7c>
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} RaZ>.5
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//线程睡眠 c\bL_
public static void sleep(int nSecond)
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{ 0c_xPBbB+
try{ I`>U#x*
Thread.sleep(nSecond); v9$!v^U"D
} rr<E#w
catch(Exception e) >ZA=9v
{ bp1AN9~
e.printStackTrace (); .8hI
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} 2hE(h
} xNP_>Qa~
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//日志 6Rd4waj_,U
public static void log(String sMsg) &y[NCAeA
{ K%(y<%Xp
System.err.println(sMsg); 5~Y`ikwxL
} "L~(%Nx3
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O 4 !$
public static void log(int sMsg) E+td~&x
{ hbjAxioA
System.err.println(sMsg); l,ENMKA^D
} sdu?#O+c1
} }`"`VLh
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/* xU
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**TestMethod.java ! -gU~0
*/ ,Q`qnn&
package NetFox; %+7]/_JO&