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/* ,
R.+-X **SiteFileFetch.java UB&S 2g */ E!}-qbH^ package NetFox; 7ck0S+N'b import java.io.*; 2p3u6\y import java.net.*; H8t{ >C)] !{]v='
"PX3%II public class SiteFileFetch extends Thread { Ji}IV R 6yvpH 3 ?|; on SiteInfoBean siteInfoBean = null; //文件信息Bean zIYr0k*% long[] nStartPos; //开始位置 (fGJP*YO long[] nEndPos; //结束位置 P=sK+}5`q FileSplitterFetch[] fileSplitterFetch; //子线程对象 h&k^l, long nFileLength; //文件长度 .{]c&Ef+f boolean bFirst = true; //是否第一次取文件 0Li'a{n 2 boolean bStop = false; //停止标志 w7t"&=pF7 File tmpFile; //文件下载的临时信息 )V$! DataOutputStream output; //输出到文件的输出流 #PLB$$ ,md7.z]U~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) kJ<Xq
public SiteFileFetch(SiteInfoBean bean) throws IOException ! ?U^+)^$ { CTbhwY(/ siteInfoBean = bean; p4t!T=o/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); d$pf[DJQo tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7E75s)KH if(tmpFile.exists ()) hPXVPLm7I { p:Ld)U * bFirst = false; $:gSc&mx read_nPos(); SSsQu^A } !q6V@& else f({-j%m { )Q nStartPos = new long[bean.getNSplitter()]; M Xt + nEndPos = new long[bean.getNSplitter()]; $?A Uk } _:=OHURc ;!Z7-OZX ~S=fMv^BR X$h~d8@r } M>H^<N}'A @61N[ 19-yM`O public void run() er7/BE& { }!7DF //获得文件长度 ]-Y]Q%A4 //分割文件 E0B2>V //实例FileSplitterFetch HYYx*CJ) //启动FileSplitterFetch线程 Qbt>}?- //等待子线程返回 ^sn>p}Tg try{ ;3?J#e6; if(bFirst) V45Udwp^ { (kNTXhAr4 nFileLength = getFileSize(); ABe^]HlH if(nFileLength == -1) 2#A9D.- h { iGeT^!N System.err.println("File Length is not known!"); 7(USp#" } oS|~\,p" else if(nFileLength == -2) MG5Sn*(C { iK:qPrk- System.err.println("File is not access!"); a;owG/\p } ^5 =E`q". else KY34 'Di { P7.8tM2} for(int i=0;i<nStartPos.length;i++) w|FVqX { ;Owu:} nStartPos = (long)(i*(nFileLength/nStartPos.length)); qg:I+"u } Y~SlipY_ for(int i=0;i<nEndPos.length-1;i++) n*4X/K { B|$13dHfa nEndPos = nStartPos[i+1]; ,u^0V"hJ } i\4"FO?v nEndPos[nEndPos.length-1] = nFileLength; R9-JjG2v } @`8 B}
C } ot<o& Zy3&Zt ^(JbJ@m/ //启动子线程 E0A|+P
'? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Vd>.fb\U2 for(int i=0;i<nStartPos.length;i++) =&/a\z! { GJ_)Cl+5E fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Vg~
kpgB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Y"rV[oe nStartPos,nEndPos,i); FY}*Z=D% Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); J6Nw-qF fileSplitterFetch.start(); EI+/%., } 9v,8OK) // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mqT0^TNPcl siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); CF92AY // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (KImqB$i. nEndPos = " + nFileLength); CWsv#XOg] // fileSplitterFetch[nPos.length-1].start(); n(xlad aDv/kFfn LVl0:!>~ //等待子线程结束 A1}+j-D7!y //int count = 0; ZDJWd=E //是否结束while循环 h`rjD d boolean breakWhile = false; 6="&K_Q7 q0Lt[*q3R fQ4$@ while(!bStop) }v,P3 { @W- f{V write_nPos(); W2Z]?l;vQQ Utility.sleep(500); ;rAW3 breakWhile = true; c7!`d.{90 dk`!UtNNRa 8\
;G+ for(int i=0;i<nStartPos.length;i++) 0)a?W,+O { k0Yixa if(!fileSplitterFetch.bDownOver) gt (nZ { 0-f- breakWhile = false; 6mpUk.M" break; >&Q. .`q } tKGsrgoV } d'fpaLV if(breakWhile) _cN)q break; `~TGVa`D l%~zj,ew wh+ibH}@! //count++; f(o`=% k8 //if(count>4) $_5v^QL // siteStop(); # |[@Due } }"H900WE| oe"ShhT 1M+!cX System.err.println("文件下载结束!"); Bd[Gsns } wVtBeZa catch(Exception e){e.printStackTrace ();} N6%q%7F.: } x:lf=DlA &r!>2$B\ ^-Ji]5~ //获得文件长度 .6#2i <oPW public long getFileSize() _>64XUZ<n { k]5L\]>y int nFileLength = -1; @$G
K<jl try{ t}l<#X5 URL url = new URL(siteInfoBean.getSSiteURL()); S-|$sV^cG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d^^>3L!h httpConnection.setRequestProperty("User-Agent","NetFox"); CZ}tQx5ga k"zHrn"$ &>+Z$ZD int responseCode=httpConnection.getResponseCode(); epm|pA* if(responseCode>=400) y&]D2"I { >UH=]$0N processErrorCode(responseCode); M
-TK return -2; //-2 represent access is error P'k39 } A79SAheX# UU`qI}Ys8F 8+F2
!IM String sHeader; HjD= .Q q1Mk_(4oJ cG6+'=]3< for(int i=1;;i++) IYN`q'%| { v)EJ|2` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); j)Gr@F> //Utility.log(in.readLine()); K)ib{V(50 sHeader=httpConnection.getHeaderFieldKey(i); (@9}FHJzi if(sHeader!=null) \g/E4U.+ { me" <+6 if(sHeader.equals("Content-Length")) St<\qC { /qG?(3 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); u05O[>w break;
q~C6+ } b-XBs7OAx } ~8K~@e $./ else |kD?^Nx break; ?jnEHn } on|>"F`pb } ?##GY;# catch(IOException e){e.printStackTrace ();} $
a7^3 catch(Exception e){e.printStackTrace ();} K\PS$ 7 m%|TwJN 4" @yGXUb Utility.log(nFileLength); "]%
L{aP e^fjla5 m6}"g[nN return nFileLength; 3.Qwn. } dc *#?G6^ 0@KBQv"v $: -Ptm@ //保存下载信息(文件指针位置) [@)|j=:i: private void write_nPos() R?k1)n { Cv3H%g+as try{ =y
ff.3mW\ output = new DataOutputStream(new FileOutputStream(tmpFile)); %pdfGM9g output.writeInt(nStartPos.length); 4YJs4CB for(int i=0;i<nStartPos.length;i++) ;a|A1DmZ { \AG,dMS // output.writeLong(nPos); 59LIK&w output.writeLong(fileSplitterFetch.nStartPos); y}|zH output.writeLong(fileSplitterFetch.nEndPos); 4V=dD<3m } [69aTl>/ output.close(); =+u$ZZ0+]o } HV>W f"1 catch(IOException e){e.printStackTrace ();} k0,~wn\#h catch(Exception e){e.printStackTrace ();} _-^@Jx[ } +r ' }9'rTLM WWY9U //读取保存的下载信息(文件指针位置) ='f>p+*c% private void read_nPos() G$q=WM!%#s { 5 p750`n try{ ~ohW9Z1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); m{' q(w} int nCount = input.readInt(); edch'H^2+P nStartPos = new long[nCount]; X|b~,X%N nEndPos = new long[nCount]; s%Z3Zj(,8( for(int i=0;i<nStartPos.length;i++) sUA)I%Q! { ms~ mg: nStartPos = input.readLong(); dJ$}] nEndPos = input.readLong(); #fwG~Q( } [scPs,5Y input.close(); ,5nrovv } ^LZU><{'; catch(IOException e){e.printStackTrace ();} _M7AQ5 catch(Exception e){e.printStackTrace ();} [!v:fj } 4bmpMF- \jC}>9 i~4:]r22 private void processErrorCode(int nErrorCode) H>VuUH| { >Z/,DIn,I System.err.println("Error Code : " + nErrorCode); sLCL\dWT } {&3n{XrF( :.@gd7T |n0 )s% 8` //停止文件下载 CFVe0!\ public void siteStop() ]NN9FM.2b/ { b"p,~{ bStop = true; Z$T1nm%lo: for(int i=0;i<nStartPos.length;i++) z"R-Sme fileSplitterFetch.splitterStop(); Hl] 3F^{ Wh"oL;O 6kHAoERp } C^.:{ } UnGG% //负责部分文件的抓取 Cdc6<8 **FileSplitterFetch.java TR]~r2z */ ;g*ab package NetFox; 9"oc.ue.2D 8LB+}N(8f JhIgqW2 import java.io.*; R j1Z import java.net.*; m@)K]0g<f GYZzWN}U ](:aDHa public class FileSplitterFetch extends Thread { YX,y7Uhn }h>QkV,{2 0d~>zKho String sURL; //File URL ?$v#;n?@I long nStartPos; //File Snippet Start Position B$sB1M0q long nEndPos; //File Snippet End Position ggfL
d r int nThreadID; //Thread's ID {!@Pho) Q boolean bDownOver = false; //Downing is over XX#YiG4|J boolean bStop = false; //Stop identical 1 f).J FileAccessI fileAccessI = null; //File Access interface x<4-Q6'{S tUH#% eo4;?z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException W/OZ}ky}^ { }>>lgW>n,; this.sURL = sURL; e}D#vPaSY this.nStartPos = nStart; aHvTbpJ this.nEndPos = nEnd; g`k_o<'JC nThreadID = id; ;J Fy
8Rj fileAccessI = new FileAccessI(sName,nStartPos);//定位 +h.$<= } G$<FQDvs ]^uO3!+ :D`ghXj public void run() 9K-=2hvv { ppP7jiGo while(nStartPos < nEndPos && !bStop) J*IC&jH: { )<nr;n B/hL $\h\,N$y try{ [R:\ URL url = new URL(sURL); Q{F*%X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i'aV=E5 httpConnection.setRequestProperty("User-Agent","NetFox"); /X>Fn9mM String sProperty = "bytes="+nStartPos+"-"; ('BFy>@ httpConnection.setRequestProperty("RANGE",sProperty); L8sHG$[ Utility.log(sProperty); (lBgWz #
Un>g4>Rh 9un* 1% InputStream input = httpConnection.getInputStream(); 'S]7:/CI //logResponseHead(httpConnection); +c$]Q-( A82Bn|J }#va#Nb(, byte[] b = new byte[1024]; ~7a(KJgvd" int nRead; xLhN3#^m while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) PEqO<a1Z8 { +s?0yH-%p nStartPos += fileAccessI.write(b,0,nRead); m!{Xu y //if(nThreadID == 1) r:Uqtqxh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R+,eX jz" } owHV&(Go(B `D)ay V8AF;1c?-' Utility.log("Thread " + nThreadID + " is over!"); baJ(Iy$XT bDownOver = true; ;o*n*N //nPos = fileAccessI.write (b,0,nRead); AfAg#75q } ZuF"GNUC catch(Exception e){e.printStackTrace ();} >b9nc\~ } 4JF)w;X} } sDNV_}
h S
ykblP37 m]LR4V6k| //打印回应的头信息 =fk+"!-i%" public void logResponseHead(HttpURLConnection con) R1$O )A}k { f44b=,Lry5 for(int i=1;;i++) hF`e>?bN { pe(31%(h String header=con.getHeaderFieldKey(i); Th1/Bxb:
if(header!=null) 7)iB6RBK //responseHeaders.put(header,httpConnection.getHeaderField(header)); N$#518 Utility.log(header+" : "+con.getHeaderField(header)); Ut"~I)S{LT else z@@w?>* break; 8Q $fXB } 8&?kr/_Vr } QEd>T"@g qf7:Q?+.| L0ZgxG3:g public void splitterStop() _3_d;j#G U { gcLwQ- bStop = true; a`SQcNBf* } kaSi sjd xDRNt Lj<u N^,@s"g } 3@u<Sa v=n'#:k V=#L@ws /* |Ld/{&Qr **FileAccess.java ?_S f *//文件访问(定位,写) w-~u[c package NetFox; F_8<
tA6 import java.io.*; w h4WII j@OGl&'^- fBgW0o.Bu public class FileAccessI implements Serializable{ V*an0@ e;LJdd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ` oBlv RandomAccessFile oSavedFile; zj G>=2 long nPos; 4 [@`j{ ^G5BD_ [8Zq
1tU;G public FileAccessI() throws IOException lWYZAF>?Ym { [3Qu @;"& this("",0); Z1V%pg>]* } 9C-!I, $s]c'D) ujF*'*@\
public FileAccessI(String sName,long nPos) throws IOException EH;w
<LvT { ,^dyS]!d$ oSavedFile = new RandomAccessFile(sName,"rw"); l.tNq$3pS this.nPos = nPos; }=kf52Am,} oSavedFile.seek(nPos); D@[Mk"f } =F>@z4[P- f< A@D"m/ zP\n<L5 public synchronized int write(byte[] b,int nStart,int nLen) z"`q-R }m { wKe$(>d"L int n = -1; &_Py{Cv@Dw try{ XY(3!>/eQ[ oSavedFile.write(b,nStart,nLen); 3q*y~5&I n = nLen; ]ZkhQ% } E\U6n ""] catch(IOException e) Vc!` BiH { AF5$U8jf e.printStackTrace (); y=!"++T]B< } ]<z4p'F1% Ax[!7~s esCm`?qCP return n; $+` YP } 5@3[t`n' p7b`Z>} <{rRcFR } }wmn v 7I~Ww{ G([8Q8B4+ /* g|*2O}< **SiteInfoBean.java xZjl_bJ */ Q\G8R^9j p package NetFox; rDkAeX0 Z!Sv/5xx P_+S;(QQ~d public class SiteInfoBean { $|.x !sA V%k[S|f3 bHcb+TR3 private String sSiteURL; //Site's URL ($*bwqp]} private String sFilePath; //Saved File's Path cSCO7L2E18 private String sFileName; //Saved File's Name E",s] private int nSplitter; //Count of Splited Downloading File RWmQP%A}aw ey<u 21GjRPs\ public SiteInfoBean() )
Ph. {//nSplitter的缺省值为5 9Ue3
%?~c //default value of nSplitter is 5 uyP)5, this("","","",5); ^7v}wpwX\ } /b,+YyWi% vC~];!^ pH.wCD:1n public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) L>$yslH;b { P(G$@},W sSiteURL= sURL; L*bUjR,C sFilePath = sPath; |Hg )!5EJ sFileName = sName; (V@g?|LZ this.nSplitter = nSpiltter; {EbR
= Z@&_ T3M a`(6hL3IT } 6XUcJ0 CF9a~^+% o%h"gbvMY! public String getSSiteURL() .6SdSB^M { w[\*\'Vm0 return sSiteURL; XyJ*>;q } G_zJuE$V .:Bjs* :bwdEni1P public void setSSiteURL(String value) s `xp6\$ { Gm^@lWzG sSiteURL = value; '#xxjhF^ } `x$d8(1J`# GdEkA qu BTRW9 public String getSFilePath() r&)/3^S ' { 0!veLXeK! return sFilePath; +`9
]L]J]4 } q7mqzMDk 9>u2;
'Ls .Br2^F public void setSFilePath(String value) 3 8pw { rZ 9bz}K sFilePath = value; }$#e&&)n } nH}api^0A 5tHv'@ ^M6v;8EU public String getSFileName() l"o@.C}f/ { W+BM|'%}| return sFileName; 'VFxg, } ma@ws,H &}32X-~y |;'V":yDs public void setSFileName(String value) y/mxdPw { Ks@S5:9sp sFileName = value; y;Q_8|,F } LdR}v%EH I!9u](\0 \2-!%i, public int getNSplitter() $EW31R5h<s { '@2pOq return nSplitter; ,&
=(DJ } Sd'
uXX@ u91;GBY \hQ[5> public void setNSplitter(int nCount) wfM$JYfI { ]
M"{=z nSplitter = nCount; K8Gc5#OF } ,Bp\ i } !cE>L~cza [0yKd?e [|d:QFx /* v~q2D" **Utility.java t9&)9,my */ Nz#T)MGO` package NetFox; c 6}d{B[ E:4`x_~qQ dn$1OhN8M public class Utility { mC
n,I tq}sXt $Eg|Qc-1 public Utility() &BqRyUM$F { IKKd qC SJ=T; j;<Yje&Wz } 7]d396% 9'o!9_j //线程睡眠 T.<eriv public static void sleep(int nSecond) -_
.f&l8 { l]WVgu try{ .UakO,"z Thread.sleep(nSecond); \U4O*lq } ,]i ^/fT catch(Exception e) N)lzX X { |rH;}t|un e.printStackTrace (); 4wX{ N } _Hl[Fit<j1 } Z_}vjk~s R5ZnkPEA //日志 r*N:-I~z public static void log(String sMsg) M-K<w(,X { Vg#s System.err.println(sMsg); [g]ks } 5UVQ48aT :J@q
Xa A,W-=TC public static void log(int sMsg) CCDoiTu!4 { l:a+o gm3 System.err.println(sMsg); 9hHQWv7TgK } a^< } {W3%n* q 0L$v7,
5 wp-5B= #:{ /* TgSU}Mf)a **TestMethod.java o*:VG\#Z6 */ .6!IO^`[ package NetFox; j2cLb _b<Fz`V GfUIF]X public class TestMethod { O_nk8 5@tpJ8E8$ !
W$u~z public TestMethod() @CP"AYB # { ///xx/weblogic60b2_win.exe V2ypmkn8& try{ >@[`, SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %/,PY>:| //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 'd]9u9u SiteFileFetch fileFetch = new SiteFileFetch(bean); kWF4k fileFetch.start(); q#pBlJ.LK } q =b.!AZy catch(Exception e){e.printStackTrace ();} b\7-u- ~=Z&l RecA?-0 } { Y|h;@j$ #-'=)l}i1A 1(gb-u0 public static void main(String[] args) A]Zp1XEG { h.%VWsAO7 new TestMethod(); W([)b[-* } <.HHV91 } yH|ucN~k5S 点击下载更多相关资料
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