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/* P;X0L{u0H **SiteFileFetch.java ulEtZ#O{_ */ J!Rqm!)q package NetFox; LR4W import java.io.*; f*m^x7 import java.net.*; I;<__ l4I',79l 6aAN8wO;b public class SiteFileFetch extends Thread { $fPiR 3EA_-? C.}ho.}
r SiteInfoBean siteInfoBean = null; //文件信息Bean !QqVJ a{j long[] nStartPos; //开始位置 Pc+,iK> long[] nEndPos; //结束位置 zQGj,EAM} FileSplitterFetch[] fileSplitterFetch; //子线程对象 e-xT.RnQ long nFileLength; //文件长度 AXo)(\ boolean bFirst = true; //是否第一次取文件 @P=n{-pIW boolean bStop = false; //停止标志 ]r#NjP File tmpFile; //文件下载的临时信息 96gaun J DataOutputStream output; //输出到文件的输出流 >Fe=PRs @te}Asv //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mEb`ET| public SiteFileFetch(SiteInfoBean bean) throws IOException i!<(R$Lo { 11!4#z6w siteInfoBean = bean; M%!j\}2A //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); mkgL/h* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); K|;L{[[yH if(tmpFile.exists ()) xi.QHKBZaH { %u Dd#+{ bFirst = false; 0'zjPE# read_nPos(); ~PN[ #e] } idS+&:' else I'<sJs*p { 5mZ9rLn nStartPos = new long[bean.getNSplitter()]; {-|El}.M nEndPos = new long[bean.getNSplitter()]; _JKz5hSl } =wl0 X&i" K'mV 20Rm|CNH? u)D!Rh V& } 7i=ER*F~ 'Rv.6>xqc +~;#!I@Di public void run()
!_&;#j]( { Xi=4S[.4 //获得文件长度 ?.MlP,/K //分割文件 (tg+C\
S. //实例FileSplitterFetch
@3I?T
Q1 //启动FileSplitterFetch线程 4LJOT_ //等待子线程返回 a=[|"J<M try{ +:J:S"G if(bFirst) S!
.N3ezn { L_=3`xE
_ nFileLength = getFileSize(); ^<aj~0v if(nFileLength == -1) v1NFz>Hx { BK.RYSN System.err.println("File Length is not known!"); (<|1/^~= } q}&+{dN\1 else if(nFileLength == -2) You~
6d6Om { $K1)2WG System.err.println("File is not access!"); L$ju~0jl)% } (g tOYEqx else MR* %lZpB { Sh<A936/E for(int i=0;i<nStartPos.length;i++) (B].ppBii { H_%ae'W nStartPos = (long)(i*(nFileLength/nStartPos.length)); <9Ytv|t@0 } JNA_*3' for(int i=0;i<nEndPos.length-1;i++) ;|CG9|p { ^687U,+ nEndPos = nStartPos[i+1]; T
zHR } oIKuo~
nEndPos[nEndPos.length-1] = nFileLength; 8KzH
- } _<)HFg6 } ^;EwZwH[ O(T6Y80pU gf,[GbZ //启动子线程 ZZ].h2=K fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; d5=yAn-+= for(int i=0;i<nStartPos.length;i++) 6 c-9[-Px { 3cFvS[JG fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :XO7#P siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), >LFj@YW_) nStartPos,nEndPos,i); MV?sr[V-oP Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); T%2%*oa fileSplitterFetch.start(); VmTgD96 } e/IVZmUn^ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2-wgbC5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6c[ L*1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Nbm$ta nEndPos = " + nFileLength); bB.Yq3KI // fileSplitterFetch[nPos.length-1].start(); DJH,#re> leJ3-w{ 2 l{3ZN"`I //等待子线程结束 jTok1k //int count = 0; \Xg`@JrTM //是否结束while循环 ;;zd/n2b boolean breakWhile = false; N*Xl0m(Q A)f/ww)Q 9/5EyV while(!bStop) tkhEjTZ { TfA;4^ write_nPos(); &_Gu'A({J Utility.sleep(500); #U/L8 breakWhile = true; |Lz7}g=6 .@f)#2 |Fzt|
\ for(int i=0;i<nStartPos.length;i++) &. "ltB { $K!6T if(!fileSplitterFetch.bDownOver) rK
cr1VFy { zm^5WH breakWhile = false; z%/<|`
7 break; z-h7v5i" }
yc@:*Z } bKPjxN?!9 if(breakWhile) ?*U:=| break; rj;~SC{ boIFN;Aq" q%Lw#f //count++; ch0x*[N@ //if(count>4) ~ZRtNL9 // siteStop(); T;B/Wm!x } x@<!# d+
l65Qk2<YC t?_{ System.err.println("文件下载结束!"); `qr.@0whP } lJBZ0 catch(Exception e){e.printStackTrace ();} :j%
B(@b } kX'a*AG KU;m.{ unkA%x{W; //获得文件长度 ~RnBs`&! public long getFileSize() qnU$Pd { lK y4Nry9 int nFileLength = -1; m\J"P'= try{ 7e@Bkq0) URL url = new URL(siteInfoBean.getSSiteURL()); Zq\ p%AU9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); LwEc*79 httpConnection.setRequestProperty("User-Agent","NetFox"); T04&Tl'CT 3-
4jSN\ Wi!$bL`l int responseCode=httpConnection.getResponseCode(); (:J
U if(responseCode>=400) <p8>"~R { (I(k$g[> processErrorCode(responseCode); F#\+.inO return -2; //-2 represent access is error
B*Q } \!'K#%]9 dY]iAJ b]5S9^=LI String sHeader; q|R$A8)L. 4S,/Z{ J. 3a6 for(int i=1;;i++) #'h(o/hz&& { %v1*D^)) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); [wjH;f>SQ //Utility.log(in.readLine()); *",
BP]] sHeader=httpConnection.getHeaderFieldKey(i); >U')ICD~ if(sHeader!=null) H6-{(:
*< { F5f1j]c if(sHeader.equals("Content-Length")) AV["%$: { ^]?Yd )v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); kZvh<NFh_ break; J~rjI24 } \b|Q `)TK } |0aGX]Y else 9 kS;_(DB break; <<9Y=%C+ } W|[k]A` 2
} G X>T~i\f8 catch(IOException e){e.printStackTrace ();} 3`Q>s;DjIU catch(Exception e){e.printStackTrace ();} u=p-]? kn7Qvk[+ e!*%U=[Q Utility.log(nFileLength); D
z5(v1I9A qy~@cPT ~m@w p return nFileLength; p4{3H+y } .FAuM~_99b 6dX l ny1H >d#6qXKAU //保存下载信息(文件指针位置) } T<oLvS private void write_nPos() pNR69/wGi { de?lO;8 try{ <\S
j5 output = new DataOutputStream(new FileOutputStream(tmpFile)); DM@&=c output.writeInt(nStartPos.length); $ *^E for(int i=0;i<nStartPos.length;i++) 'l3K*lck { x<e-%HB*- // output.writeLong(nPos); .TWX,# output.writeLong(fileSplitterFetch.nStartPos); _7 9 ?,U] output.writeLong(fileSplitterFetch.nEndPos); Y=N; Bj } <E&"] output.close(); ) _O6_ } T@H2[ 7[; catch(IOException e){e.printStackTrace ();} LC:bHM,e catch(Exception e){e.printStackTrace ();} M4TFWOC1 } W&(98}oT `` mi9E 1f`=U0 //读取保存的下载信息(文件指针位置) lw"5p)aB private void read_nPos() A4uDuB;;ZQ { l<mEGKB# try{ k@= LR DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); P(BV J_n int nCount = input.readInt(); r=ds'n" nStartPos = new long[nCount]; w~(x*R} nEndPos = new long[nCount]; L]HYk}oD. for(int i=0;i<nStartPos.length;i++) tqo!WuZAj { kaj6C_k| nStartPos = input.readLong(); ';bovh@* nEndPos = input.readLong(); ZM%z"hO9R } ]tVXao input.close(); RDu'N } m}3POl/*j catch(IOException e){e.printStackTrace ();} f@a@R$y catch(Exception e){e.printStackTrace ();} R9z^=QKcH } \3@A C7 |+MV%QG; 5=.EngG private void processErrorCode(int nErrorCode) q#~]Hp=W5 { |.Pl[y System.err.println("Error Code : " + nErrorCode); 'qg q8 } +tXOP|X !zNMU$p C=/nZGG //停止文件下载 #dgWXO public void siteStop() D%Y{(l+X { j\SW~}d9 bStop = true; cAE.I$T( for(int i=0;i<nStartPos.length;i++) yxa~Rz/ fileSplitterFetch.splitterStop(); 3yAzt*dZ pQY.MZSA }3Y3f).ZW } ?=uw0~O[ } z!I(B^)BkT //负责部分文件的抓取 5Y8/ZW~D0 **FileSplitterFetch.java :K6(`J3Y"^ */ o=
%Fh package NetFox; 9GZKT{* [af<FQ { emV@kN. import java.io.*; NX(.Lw} import java.net.*; '?~k`zK L_rKVoKjt Tx7YHE6{ public class FileSplitterFetch extends Thread { t*)-p:29h X=p~`Ar M{ -R;.Md_ String sURL; //File URL q#RVi8(' long nStartPos; //File Snippet Start Position WqC6c&NM long nEndPos; //File Snippet End Position TvWhy`RQ int nThreadID; //Thread's ID E5M*Gs boolean bDownOver = false; //Downing is over ),-4\!7 boolean bStop = false; //Stop identical iM Xl}3 FileAccessI fileAccessI = null; //File Access interface nV0"q|0K; B94mh ;Db89Nc$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException uj-q@IKe { -hP@L ++D this.sURL = sURL; [D H@>:"dd this.nStartPos = nStart; {O,Cc$_ this.nEndPos = nEnd; ]AGJPuX nThreadID = id; d*lnXzQor fileAccessI = new FileAccessI(sName,nStartPos);//定位 <oSk!6* } .Wq`qF(; qu[x=LZ_ eD, 7gC- public void run() .O'gD.|^N { <)]B$~(a while(nStartPos < nEndPos && !bStop) m//(1hWv7 { VB 8t"5 +6!.)Ea= e3wFi,/@ try{ 5CkM0G` URL url = new URL(sURL); J|Lk::Ri HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); x
c-=;|s httpConnection.setRequestProperty("User-Agent","NetFox"); 56o?=| String sProperty = "bytes="+nStartPos+"-"; dxkXt k httpConnection.setRequestProperty("RANGE",sProperty); @Ey(0BxNu Utility.log(sProperty); MWCP/~>a2 C<6IiF[>% 3Nh;^ InputStream input = httpConnection.getInputStream(); 0rT-8iJp4P //logResponseHead(httpConnection); flLC\ J680|\ ER #TUsi,jG byte[] b = new byte[1024]; ~S
R:,R int nRead; XQk9 U while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0X)'8N { %+G/oF| nStartPos += fileAccessI.write(b,0,nRead); hSD)| //if(nThreadID == 1) {
Lt\4h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); fj 19U9R } r&\}E+ +gOCl*L KTk%Np Utility.log("Thread " + nThreadID + " is over!"); =? x A*_^ bDownOver = true; B{|P}fN5} //nPos = fileAccessI.write (b,0,nRead); =?57*=]0M } >;QkV6i7 catch(Exception e){e.printStackTrace ();} -)?~5Z } u9>.x
zYG } "wxs q]5"V>D \ FI~)ZhE)] //打印回应的头信息 QHsS|\u public void logResponseHead(HttpURLConnection con) jjz<V(Sk { "31GC7 for(int i=1;;i++) }qW%=;! { `2NL'O: String header=con.getHeaderFieldKey(i); 8\y%J!b if(header!=null) gzP(LfI5 //responseHeaders.put(header,httpConnection.getHeaderField(header)); C>@~W(IE Utility.log(header+" : "+con.getHeaderField(header)); RN3w{^Ll else .d9VV& break; U;6~]0^K } tGd9Cs9D< } 5D]%E?ag ~/\;7E{8! 9GkG' public void splitterStop() s iv
KXd { .$4DK* bStop = true; k KL^U } (J<@e!@NE )u]<8 Tc\^=e^N? } S_6`.@B} 7esG$sVj( tZU"Ud /* A@_F ;4X **FileAccess.java "`,PLC *//文件访问(定位,写) S,3e|-&$ package NetFox; ^$_ifkkLz import java.io.*; +]CKu$,8 IVkKmO(qO *u7C){)gr[ public class FileAccessI implements Serializable{ kzns:-a bg_Zf7{ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UY{
Uo@k9x RandomAccessFile oSavedFile; $1\<>sJH
long nPos; \p@,+ -gX ahS*YeS7 }PyAmh$@ public FileAccessI() throws IOException >}O1lsjW:z { X'jEI{1w this("",0); 0V}vVAa(B } m2{z [CRy>hfV w>H!H6Q public FileAccessI(String sName,long nPos) throws IOException \fU{$ { x7Ly, oSavedFile = new RandomAccessFile(sName,"rw"); ILF"m; this.nPos = nPos; MJV&%E6{:{ oSavedFile.seek(nPos); 7x-k-F3 } u/y`M]17 xYM/{[ dm.?-u;C public synchronized int write(byte[] b,int nStart,int nLen) Ej 'a
G { 1oj7R7 int n = -1; WU#bA|Cf try{ (rZq0* oSavedFile.write(b,nStart,nLen); w6R=r
n n = nLen; DWk'6;e4j } {E6b/G?Q
catch(IOException e) )J~Qx-jG { I^M3>}p e.printStackTrace (); }
%S1OQC } A[ /0on5r 9Wx q 5
;dg#hO return n; gA2\c5F< } XV %L6x *[W! ng bMkn(_H)\ } <LZvG IMl 3{on$\ # dW$"u /* ,O3"r; **SiteInfoBean.java #hR}7K+@ */ A>7'W\R package NetFox; O%(:8nIgZ \RMYaI^+; u33+ ikYv public class SiteInfoBean { &}:Hp9n B{s[SZ RXl52#: private String sSiteURL; //Site's URL X@af[J[cQ private String sFilePath; //Saved File's Path 4(u+YW GX private String sFileName; //Saved File's Name X[NsdD?w1+ private int nSplitter; //Count of Splited Downloading File kfm8F8sxl jW2z3.w pl
q$t/.U; public SiteInfoBean() VC>KW{&J0 {//nSplitter的缺省值为5 dldM hT$ //default value of nSplitter is 5 nm %ka4 this("","","",5); z>~`9Qiw' } S:rW}r J RF g$N@g, nN@8vivP% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) zMtK_ccQ { jh\q2E~,` sSiteURL= sURL; X?4tOsd sFilePath = sPath; % OiSuw sFileName = sName; C&<f YCwG this.nSplitter = nSpiltter; OX|/yw8 Eto0>YyZ u4z]6?,"e } uZmfvMr3 w{2V7*+l e
*;"$7o9 public String getSSiteURL() ",&}vfD4M { _a15R/S return sSiteURL; j]Rl1~+M } KMoRMCT tEiN(KA!5 ZW+{<XTof4 public void setSSiteURL(String value) t4h05 i { M9bb,`X>Q sSiteURL = value; `'Z ;+h] } Qkr'C
n rU.ew~ zFB$^)v"< public String getSFilePath() lmr{Ib2a { Y&'2/zI6~ return sFilePath; Am kHVg } C/!2q$ eSa ]6 :l3Tt< public void setSFilePath(String value) *RxbqB- { G_j`6v) sFilePath = value; 8.Y6r } ^U~YG=!ww tJHzhH) `jP\*k`~] public String getSFileName() .~W7{SY[ { !WVF{L,/I return sFileName; q3scz } gyI5;il~ %@H;6
[2)Y0; [" public void setSFileName(String value) a&XURyp { !i)?j@D sFileName = value; 3.R?=npA } NwT3e&u%| dBobVT' w?!@fu public int getNSplitter() *QjFrw3 { Q^fli"_: return nSplitter; (]mN09uE } ,6a'x~y<r <bGSr23* ~(I\O?k>H public void setNSplitter(int nCount) zpg*hlv { 9-bDgzk
nSplitter = nCount; WNd(X} } RMLs(?e } g<UjB FE$)[ w,m YdE$G>&em /* d['BtVJ **Utility.java s{IycTbz */ )5&w package NetFox; ^P&y9dC. p(U'c}@2 tgg*6lc public class Utility { gfih;i.pY AO8`ItNZdT #MOEY|6 public Utility() tOp>OoD { <5C3c&sds 4\Q ?4ZX }ZvL%4jT } Bz7T1B&to ^(UL$cQ> //线程睡眠 'H*S-d6V public static void sleep(int nSecond) p1G!-\l { Mg^GN-l try{ Q !S"=2 Thread.sleep(nSecond); V/762&2X } \'E%ue_<9 catch(Exception e) /0"Y.
@L { /o8h1L= e.printStackTrace (); 7c+TS-- } ";s?#c } %3z-^#B= s:;!QIC5jo //日志 Ds0^/bYp& public static void log(String sMsg) b.C!4^ { ;uDH&3W System.err.println(sMsg); #Q$9Eq8"[ } UKk~)Of 1_GUi MlS<txFPS public static void log(int sMsg) ?L{[84GSO { hQ8/-#LO_ System.err.println(sMsg); Wl::tgU } 1(rH5z'F } oh#6>| gZ/M0px /lAt&0 /* 3Yg/-=U( **TestMethod.java ^aXyho */ p~+)!Z# package NetFox; p0'A\@| vpOzF>O HPr5mWs: public class TestMethod { A*MlK" H.wp{m{ dO rgqz`e public TestMethod() p# O%<S@? { ///xx/weblogic60b2_win.exe H4^-M Sw try{ X^fMt] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x:@Ht TX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); F/&Z1G. SiteFileFetch fileFetch = new SiteFileFetch(bean); ",`fGu ) fileFetch.start(); y=5s~7] } ~i6tcd catch(Exception e){e.printStackTrace ();} 3H@TvV/;f ']A+wGR&r }& `# } {$O.@#' 3EF|1B/5 /`}C~ public static void main(String[] args) p4HX83y{ { gWgYZX new TestMethod(); Q[`_Y3@j } QfT&y & } (#LV*&K%IC 点击下载更多相关资料
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