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/* Z}$.Tm **SiteFileFetch.java sR'rY[^/| */ $UO7AHk package NetFox; - C8h$P import java.io.*; (F~eknJ import java.net.*; lbTz q'd6\G0} "k5 C? ~ public class SiteFileFetch extends Thread { ?OlYJ/!z3 LYv+Sv <-X)<k SiteInfoBean siteInfoBean = null; //文件信息Bean
{.;MsE long[] nStartPos; //开始位置 ]%F3 xzOk long[] nEndPos; //结束位置 |OuZaCJG FileSplitterFetch[] fileSplitterFetch; //子线程对象 qvhTc6oH long nFileLength; //文件长度 .kvuI6H boolean bFirst = true; //是否第一次取文件 l% K9Ke boolean bStop = false; //停止标志 i#&]{]}Qv File tmpFile; //文件下载的临时信息 vQYd!DSh DataOutputStream output; //输出到文件的输出流 F(}d|z@@
l'?/$?'e_Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _8DY9GaE public SiteFileFetch(SiteInfoBean bean) throws IOException >"N \ZC^ { yz,ak+wp siteInfoBean = bean; 1&U'pp|T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); rJKX4,M tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); DJT)7l { if(tmpFile.exists ()) phEM1",4T { nD!C9G#oS bFirst = false; *+lnAxRa? read_nPos(); `L7 cS } l,-smK69
else enK4`+.7 { C&K%Q3V nStartPos = new long[bean.getNSplitter()]; <iv9Mg} nEndPos = new long[bean.getNSplitter()]; qdvGBdF } =}u;>[3 Ui'~d(F ;m{[9i`2 pBh[F5 } .V
9E@_( Nr6YQH*[ rOS fDv public void run() zxTm`Dh;[ { 6D_4o&N //获得文件长度 OA&N WAm4 //分割文件 nakhepLN //实例FileSplitterFetch ?r2Im5N //启动FileSplitterFetch线程 I&1h/ //等待子线程返回 R qOEQ*k try{ SL>>]A,E<` if(bFirst) >c8zMd { VBBqoyP
h nFileLength = getFileSize(); "?}QwtUW if(nFileLength == -1) GVCyVt[!- { l?Bv9k.^? System.err.println("File Length is not known!"); 3eFD[c%mN } ir3iW*5k else if(nFileLength == -2) Jel%1'Dc^ { 1h"0B System.err.println("File is not access!"); jQ1~B1( } ~ m,z| else x!]ZVl] { HC+(FymV for(int i=0;i<nStartPos.length;i++) $BkdC'D { ,dK% [ nStartPos = (long)(i*(nFileLength/nStartPos.length)); G2
xYa$&][ } E!C~*l]wJx for(int i=0;i<nEndPos.length-1;i++) f.Q?-M { 0'c<EJ nEndPos = nStartPos[i+1]; =HYMX"s } _av%`bb&z9 nEndPos[nEndPos.length-1] = nFileLength; mzfj!0zR* } Q3_ia5 `O } {- 7T\mj FzFY2h;n]B W5EB+b49KM //启动子线程 ,`S"nq fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; w'?uJW for(int i=0;i<nStartPos.length;i++) HaJD2wvr { !> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %fK"g2: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DyYl97+Z? nStartPos,nEndPos,i); J:5%ff~r\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F#O.i, fileSplitterFetch.start(); onHUi]yYu{ } O9:vPbn // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F~)xZN3= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); qf(!3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", G{YJ(6etZ nEndPos = " + nFileLength); %l5Uy??Z // fileSplitterFetch[nPos.length-1].start(); A!W(> ^h4Q2Mv o *.ZV.( //等待子线程结束 P;mmK&& //int count = 0; )7*Apy==x //是否结束while循环 f)?s.DvUB boolean breakWhile = false; po\Q Me cQS}pQyYN s:i$ s") while(!bStop) BVC\~j
j { }V6}>!Sb write_nPos(); 9iUkvnphh Utility.sleep(500); qwiM.b5 breakWhile = true; 6 @'v6 1' vAHJP$x =Q[5U9 for(int i=0;i<nStartPos.length;i++) rnEWTk7& { 57%:0loW if(!fileSplitterFetch.bDownOver) "72
_Sw { 7f~.Qus breakWhile = false;
QU8?/ break; h9 [ov) } \b{=&B[Q$' } Pdrz lu if(breakWhile) zG+oZ break; kYmkKl_ Ag#p ) W5HC7o\4 //count++; N=)N
//if(count>4) maXQG&.F // siteStop(); Q<w rO } (VU: &. ;~tKNytD`B HwiG~'Ah9 System.err.println("文件下载结束!"); SI4M<'fK } o%RyE]pw, catch(Exception e){e.printStackTrace ();} AL3zE=BL } {[NBTT9& svHs&v dl;^sn0s //获得文件长度 n;/yo~RR public long getFileSize() )Uo)3FAn { qIuY2b`6 int nFileLength = -1; NIQNzq?a^ try{ bTb|@ URL url = new URL(siteInfoBean.getSSiteURL()); nH/V2>Lm HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5ju\!Re3X httpConnection.setRequestProperty("User-Agent","NetFox"); =Pd3SC})6V |J?KHI [8l8m6 int responseCode=httpConnection.getResponseCode(); vRVQ:fw if(responseCode>=400) #L`@[" { A)/_: processErrorCode(responseCode); QUH USDT return -2; //-2 represent access is error <t.yn\G-w } kOs_] @m<xpel [qI, $ + String sHeader; bmGIxBRq o/)]z "2o)1G for(int i=1;;i++) ")i4w{_y { pbl;n| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); E&7U |$ //Utility.log(in.readLine()); [59_n{S 1 sHeader=httpConnection.getHeaderFieldKey(i); 5)AMl) if(sHeader!=null) %f*8JUE16 { ?qO_t;:0> if(sHeader.equals("Content-Length")) Dc}-wnga { q~T*R<S nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !Hr~B.f7 break; nulVQOj| } '[I?G6 } hDSt6O4za else l> W?XH break; ?|w>."F } d3St Z~&r! } `DUMTFcMX catch(IOException e){e.printStackTrace ();} 'W@X139zq catch(Exception e){e.printStackTrace ();} ;vy" i f)Z$,& p?>(y Utility.log(nFileLength); &&nvv &a Vof[yL ` [h
{zT)[ return nFileLength; V<*PaS.. } p$`71w)'[ [sy~i{Bm 0L S,(v4 //保存下载信息(文件指针位置) 3-`IMNn! private void write_nPos() ; {iX_% { y
U
=) g try{ TMpV.iH output = new DataOutputStream(new FileOutputStream(tmpFile)); 1I{vBeMj output.writeInt(nStartPos.length); |Rd?s0u for(int i=0;i<nStartPos.length;i++) -r@fLkwg { sn+g#v9e // output.writeLong(nPos); ^KM' O8 output.writeLong(fileSplitterFetch.nStartPos); wDVKp[' output.writeLong(fileSplitterFetch.nEndPos); bC{}&a } >7V96jL$Y output.close(); ^Vso`(Ss } ~k^rI jR catch(IOException e){e.printStackTrace ();} (y*7
gf catch(Exception e){e.printStackTrace ();} aY@]mMz\ } LP-~; HIsIW%B
W8z4<o[$ //读取保存的下载信息(文件指针位置) O3/][\ private void read_nPos() A<fKO <d { ;4>YPH try{ I8TqK DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); MKf|(6;~ int nCount = input.readInt(); ?x1sm"]p' nStartPos = new long[nCount]; _~/F- nEndPos = new long[nCount]; SR!EQ< for(int i=0;i<nStartPos.length;i++) _2xNio& { -K eoq nStartPos = input.readLong(); z6)b XL[f nEndPos = input.readLong(); m!Cvd9X= } }Go?j#
! input.close(); d,8L-pT$FM } ' ^E7T'v% catch(IOException e){e.printStackTrace ();} VHyH't_&s catch(Exception e){e.printStackTrace ();} X'Q?Mh } ]Wr2I M <`rmQ`(}s %A64AJZ private void processErrorCode(int nErrorCode) KSDz3qe { b+Sq[ System.err.println("Error Code : " + nErrorCode); VwvL } `?f6~$1 +O"!* Zgy~Y0Di //停止文件下载 _N)/X|=~s public void siteStop() tg-U x { >9dzl# bStop = true; 17P5Dr& for(int i=0;i<nStartPos.length;i++) q)te/J@ fileSplitterFetch.splitterStop(); i^T@jg+K D+m#_'ocL _/V<iv } (KxI* } C# zYZ JZ //负责部分文件的抓取 1Xzgm0OS; **FileSplitterFetch.java QTr)r;Tro */ VaP9&tWXj package NetFox; 4PK/8^@7)> uDD{O~wF, E+z),"QA import java.io.*; + OKk~GYf import java.net.*; k;/K']4y TWE>"8] 2iM]t&^<+ public class FileSplitterFetch extends Thread { I\e/
Bv^ =r|e]4 idsBw!DB String sURL; //File URL )|3BS` long nStartPos; //File Snippet Start Position B|d-3\sn long nEndPos; //File Snippet End Position Y*VF1M,2_ int nThreadID; //Thread's ID 3bYPi^ boolean bDownOver = false; //Downing is over &s6;2G&L$ boolean bStop = false; //Stop identical b'q ru~i FileAccessI fileAccessI = null; //File Access interface X* 4C?v I+2#k\y xmVW6 ,<? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException H=lzW_( { ?vt#M^Q
this.sURL = sURL; aa2 vk)~ this.nStartPos = nStart; o8 _)) this.nEndPos = nEnd; W(5XcP( nThreadID = id; M>qqe! c* fileAccessI = new FileAccessI(sName,nStartPos);//定位 ^_\S)P2c } uA-1VwW+N S)LvYOOB@ nA*Udrcn public void run() 4y*"w*L { '+EtnWHs while(nStartPos < nEndPos && !bStop) (aC~0
#4 { `D/<*e,# W&~\@j]!D =[JstiT?E try{ ycq+C8J+Ep URL url = new URL(sURL); n(uzqd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b~$8<\ httpConnection.setRequestProperty("User-Agent","NetFox"); |j}D2q= String sProperty = "bytes="+nStartPos+"-"; b :WA}x V httpConnection.setRequestProperty("RANGE",sProperty); k3(q!~a:.} Utility.log(sProperty); QmgO00{ lA{JpH_Y8s h;Hg/jv InputStream input = httpConnection.getInputStream(); [KQ#b //logResponseHead(httpConnection); MO^Q 8v ^>wlj 3</W}]$)p byte[] b = new byte[1024]; M^ZEAZi int nRead; p40;@gUug while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2Tp@;[!3 { zMke}2 nStartPos += fileAccessI.write(b,0,nRead); FEH+ PKSc //if(nThreadID == 1) _C@A>]GT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?K\r-J!Y } MgO_gFr <
]"Uy p p[Zk;AT~ Utility.log("Thread " + nThreadID + " is over!"); %W}YtDf\ bDownOver = true; hbdB67, //nPos = fileAccessI.write (b,0,nRead); Mfn^v:Q# } )%q!XM catch(Exception e){e.printStackTrace ();} Tw,|ZA4XH } 6E@TcN~,! } |A.nP9 hW dVMduo Sx:JuK@ //打印回应的头信息 `+h+X9 public void logResponseHead(HttpURLConnection con) mxnu\@}( { dQn,0 for(int i=1;;i++) =AcK9?%5 { w=_q<1a String header=con.getHeaderFieldKey(i); HTLS$o;Q if(header!=null) +iqzj-e&e[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 1B#iJZ} Utility.log(header+" : "+con.getHeaderField(header)); `@xnpA]l else f
AY(ro9Q( break; 7@R^B =pb } LC7%Bfn! } o2D;EUsNX ,|g&v/WlC% )[ QT?; public void splitterStop() qeDXG {
:yw8_D3 bStop = true; "!Qi$ ] } b@S~
= 7{tU'`P> wg+[T;0 S } j#~ S"t ov<vSc<u O7]kcA /* nx(jYXVT **FileAccess.java T[evh]koB *//文件访问(定位,写) H|S hi / package NetFox; }uwZS=pw import java.io.*; 3*T/ 7\ C|V5@O?;&
:N!s@6 public class FileAccessI implements Serializable{ .,sbqL O5MV&Zb( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 "574%\#4z RandomAccessFile oSavedFile; #qu;{I#W3 long nPos; ]SAGh|+xl Q4Nut !LQzf(s; public FileAccessI() throws IOException I<Cm$8O? { 9n49p? this("",0); GkxQEL } "Lyb4# M ^6gEL~m|] G6}!PEwM public FileAccessI(String sName,long nPos) throws IOException f%3MDI { /2''EF'; oSavedFile = new RandomAccessFile(sName,"rw"); mBEMwJ}O` this.nPos = nPos; ]Exbuc oSavedFile.seek(nPos); k]A=Q } nq,:UYNJ R, #szTu 8`s*+.LI! public synchronized int write(byte[] b,int nStart,int nLen) _%3p&1ld { XqU0AbQ int n = -1; FJqg, try{ Aj]/A oSavedFile.write(b,nStart,nLen); Lf:#koaC n = nLen; guVuO } yf[1?{iVo catch(IOException e) beBv|kI4 { ^ ;K"Y'f$ e.printStackTrace (); >(_2'c*[w } +xAD;A4 -'}#j\ _>a`dp.19 return n; yRi5t{!V } mo9(2@~< $> ;| s1R#X~d } 39m8iI%w[
vTo+jQs^ bxPJ5oT /* A>,kmU5 **SiteInfoBean.java 3kh!dL3D */ k%8kt4\wn6 package NetFox; M;W&#Fz% 03AQB;. 3s?ZyQy public class SiteInfoBean { KYy oN Q@|"xKa >sdF:(JV& private String sSiteURL; //Site's URL #S]O|$&* private String sFilePath; //Saved File's Path *%\Xw*\0 private String sFileName; //Saved File's Name XZQ-Ig18 private int nSplitter; //Count of Splited Downloading File m^zD'] ;pS+S0U
?&!!(dWFH public SiteInfoBean() ++UxzUd {//nSplitter的缺省值为5 FRL;fF //default value of nSplitter is 5 txm6[Io this("","","",5); 'f0R/6h\3s } gV$0J?Pr. I FvigDj? T*S)U ; public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) EuA352x { ?9 W2ax-4 sSiteURL= sURL; eoFG$X/PO sFilePath = sPath; dNCd-ep sFileName = sName; 's5H_ah this.nSplitter = nSpiltter; K47.zu ,<C~DSAyZ [vz2< genn } ?)[=>Kp Sj:c {jyJd GY5JPl public String getSSiteURL() xOr"3;^ { O>I%O^ return sSiteURL; a^^OI|? } Ted tmX$ <WbO&;% S;/pm$?/ public void setSSiteURL(String value) !]9qQ7+R% { tR4+]K sSiteURL = value; >p#_L^oZ% } OlptO60{ ] *=]UWM~] nv(6NV public String getSFilePath() fGW~xul_ { Ic^
(6 return sFilePath; ~OLyG$JJ } ,,1y0s0` (w+SmD P(o>UDy public void setSFilePath(String value) T!pA$eE { :o87<)
_F sFilePath = value; +;*4.} } ^jcVJpyT@R (LMT ' 4N1)+W8k* public String getSFileName()
;5 { 5Q:49S47 return sFileName; t\PSB } X)=m4\R n
4cos hQz1zG`z7 public void setSFileName(String value) naA8RD5/ { sO!m,pK( sFileName = value; ~9,Fc6w4`+ } sHV?njZd loHMQKy@ \4
+HNy3 public int getNSplitter() `,Y3(=3Xe? { rmFcSolt,f return nSplitter; 0-uVmlk=/ } \IEuu^ |oePB<N \@T;/Pj{[ public void setNSplitter(int nCount) sPl3JP&s { {qU;>;( nSplitter = nCount; h0A%KL } &" 5Yt&{ } hBifn\dFr 'Q=(1a11 DeeV;?: /* }AiF 7N0 **Utility.java ;#8xRLW */ FF7?|V!Q package NetFox; eLV[U obv_?i1 (yeWArQ public class Utility { ]US!3R^ AM#s2.@ :QHh;TIG=< public Utility() ,g3n/'rP% { !/!Fc'A E8wkqZN L$"pk{' } a]6dhQ` >svx
8CT //线程睡眠 1zCgPiAem public static void sleep(int nSecond) 79k+R9m { P?jI:'u!R. try{ NF-@Q@ Thread.sleep(nSecond); 4af^SZ)l } `D$RL*C;M` catch(Exception e) [A]
+Azc { A!uiM*"W e.printStackTrace (); Jp_ :.4 } r
Cz,XYV } tWQ$`<h Qw"%Xk //日志 (.wR!l#! public static void log(String sMsg) \NKw,`/ { Q)8I(* System.err.println(sMsg); H:WuMw D4 } M6V^ur 1 dYlVJ_0Zr dl`{:ZR S public static void log(int sMsg) 9A|9:OdG1 { )t:8;;W@Ir System.err.println(sMsg); ;<%th } ~LP5hL } %F}d'TPx F ^m;xy WA*1_ /* M!%|IKw **TestMethod.java -3m!970 */ t8.3 package NetFox; |eJR3o I SdB5Va Im]6-#(9\| public class TestMethod { @~&^1%37) gkca{BJ qagR?)N)u public TestMethod() U]9k,# { ///xx/weblogic60b2_win.exe >McEuoZx9 try{ b?,=|H SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ov
>5+"q) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); K*p3#iB SiteFileFetch fileFetch = new SiteFileFetch(bean); 3BF3$_u)o fileFetch.start(); 4AF.KX7 } `joyHKZI. catch(Exception e){e.printStackTrace ();} Wdga(8t b d C 2i NZz } I\Cg-&e "{2niBx O.8k [Ht public static void main(String[] args) 1?Tj { 8]bLp new TestMethod(); h2i1w^f } #)iPvV' } {.e^1qE 点击下载更多相关资料
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