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/* #7C6yXb% **SiteFileFetch.java L<E/,IdE */ U9F6d!:L7A package NetFox; sS'{QIRC' import java.io.*; ++k J\N{ import java.net.*; RO$*G
jQd ]+lF=kkc% \4@a public class SiteFileFetch extends Thread { ^?sSx!:bZ V g6S/- ]Da4.s*mW SiteInfoBean siteInfoBean = null; //文件信息Bean +U=KXv long[] nStartPos; //开始位置 u7 u~ long[] nEndPos; //结束位置 ecT]p FileSplitterFetch[] fileSplitterFetch; //子线程对象 s[Gswd long nFileLength; //文件长度 }#|2z}! boolean bFirst = true; //是否第一次取文件 [k~C+FI boolean bStop = false; //停止标志 z"3H{ A File tmpFile; //文件下载的临时信息 .)0gz!Z DataOutputStream output; //输出到文件的输出流 [)k2=67 `OLB';D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5C65v:Q`N public SiteFileFetch(SiteInfoBean bean) throws IOException @|'Z@>!/pV { wNR=?Z~ siteInfoBean = bean; 6>lW5U^yA\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 'F<Sf:?.p tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5E.vje{U; if(tmpFile.exists ()) gQ,4xTX { No~6s.H bFirst = false; ?M]u$Te/. read_nPos(); X$ PS(_M } }Oh5Nm) else _]_L F[ { 'Dq"e$JM< nStartPos = new long[bean.getNSplitter()]; ja:\W\xhJ nEndPos = new long[bean.getNSplitter()]; ME,duY/>Q } 8ur_/h7 uAQg"j 3m~U(yho (Y>U6 } X;5 S vS2(Q0+TZi r=|vad$ public void run() lkyJ;}_** { Y& m<lnB //获得文件长度 fW[_+r] //分割文件 ?Cc$] //实例FileSplitterFetch .;j"+Ef //启动FileSplitterFetch线程 y
"<JE<X //等待子线程返回 }Uq/kei^P try{ #W.bZ]&WA if(bFirst) ;wpW2%& { R<t&F\> nFileLength = getFileSize(); {6DpPw^ " if(nFileLength == -1) HK?Foo? { `}ZL'\G System.err.println("File Length is not known!"); WE7>?H*Ro } R,XD6' Q else if(nFileLength == -2) Zq9>VqGe { 9/^d~ZO System.err.println("File is not access!"); Mc.^s } [!5l0{0 else z{AM2Z { Aw5K3@Ltz for(int i=0;i<nStartPos.length;i++) NCp%sGBmG { T<_+3kw nStartPos = (long)(i*(nFileLength/nStartPos.length)); YqkA&qL]#; } @RQ+JYQi for(int i=0;i<nEndPos.length-1;i++) :E}6S { "hz>{oe nEndPos = nStartPos[i+1]; i^~sn `o } 5NFq7&rJ6 nEndPos[nEndPos.length-1] = nFileLength; e-1;dX HL } n2H&t>N } t%
<pbZO 5BZ+b_A>VV _8Pmv$ //启动子线程 s-fKh` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; PZ~`O for(int i=0;i<nStartPos.length;i++) EC0zH#N { 5X#i65_- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7ucx6J]c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), g52 1Wdtnn nStartPos,nEndPos,i); 1fmSk$ y.9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); T %$2k> fileSplitterFetch.start(); @<0h"i
x } $HP/cKu // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5^bh.uF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <d3PDO@w/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4,o
%e,z nEndPos = " + nFileLength); :LU"5g // fileSplitterFetch[nPos.length-1].start(); !>?4[|?n< -Cg`x=G;z @263)`9G //等待子线程结束 9@JlaY)0 //int count = 0; "K/[[wX\b //是否结束while循环 )j$b9ZBk boolean breakWhile = false; p|xs|O6{ wV7@D[8 >B @i
E while(!bStop) R994R@gz { f6@^Mg write_nPos(); +qE,<c}} Utility.sleep(500); ))8Emk^Q{ breakWhile = true; )zo#1$C- h2im
sjf Vf@S8H for(int i=0;i<nStartPos.length;i++) 3Pw%[q=g { 9;}L{yve if(!fileSplitterFetch.bDownOver) ~5x4?2 { ~NTDG breakWhile = false; g/fp45s break; ly9x1`?$ } .~FKyP>[$ } #JHy[!4 if(breakWhile) 3U :YA&K( break; cg>!<T* 7Y$4MMNQ u<BHf@AI //count++; ^p{A!I! //if(count>4) =ip~J<sw& // siteStop(); u?LW+o } "H
wVK Lg\8NtP #RCZA4> System.err.println("文件下载结束!"); >eYU$/80 } U^vUdM" catch(Exception e){e.printStackTrace ();} PT
0Qzg } !y[}| z(8)1#(n7 U}mL,kj" //获得文件长度 FY_avW public long getFileSize() (MF+/fi { @S/g,;7" int nFileLength = -1; W)G2Cs?p try{ }Rf}NWU)| URL url = new URL(siteInfoBean.getSSiteURL()); xkk@{}J\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Qivf|H619 httpConnection.setRequestProperty("User-Agent","NetFox"); <DA{\'jJ w!=_ nsM>% +o int responseCode=httpConnection.getResponseCode(); ze#rYN vo/ if(responseCode>=400) 'Qp&,xK { \}]=?}( processErrorCode(responseCode); (:</R$I return -2; //-2 represent access is error Y3 Pz00x } duZ|mT8Q== y\r^\ S9% wR5\^[GN String sHeader; .b!OZ `2
%eDFZ
ox i
a} for(int i=1;;i++) F)[XIY&2/ { s0X/1Cq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); % 8rr*l5 //Utility.log(in.readLine()); Zpn*XG sHeader=httpConnection.getHeaderFieldKey(i); Y&1!Z*OL; if(sHeader!=null) sK"" { 'PmHBQvt& if(sHeader.equals("Content-Length")) i{1)=_$Vt` { Xy3g(x] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Y%n{`9= break; T6/$pJl } S\yu%=h } 8o%<.] else df21t^0/ break; ~:ub } *Dd(+NI }
]*kP> catch(IOException e){e.printStackTrace ();} HlOAo:8' catch(Exception e){e.printStackTrace ();} k=ior o}r!qL0c ~x+:44* Utility.log(nFileLength); eE#81]'6a !DY2{Wb gnKU\>2k return nFileLength; vJ# rW8y } 5~ *'>y N>F2
c)rm On2Vf*G@| //保存下载信息(文件指针位置) kG|>_5 private void write_nPos() )|59FOWg { dcrJ,>i} try{ C[J`x>-K output = new DataOutputStream(new FileOutputStream(tmpFile)); b}EYNCw_7S output.writeInt(nStartPos.length); ~,M;+T}[r for(int i=0;i<nStartPos.length;i++) Kc-A-P &Ry { M Z|c7f&` // output.writeLong(nPos); jiw`i output.writeLong(fileSplitterFetch.nStartPos); N~Sue output.writeLong(fileSplitterFetch.nEndPos); ~,`\D7Z3 } YDZ1@N}^B output.close(); w'5dk3$" } CwH)6uA catch(IOException e){e.printStackTrace ();} .LGkr@P catch(Exception e){e.printStackTrace ();} fd,}YAiX } |aOnV,} nCSd:1DY +i q+ //读取保存的下载信息(文件指针位置) ~NxoF private void read_nPos() h!t2H6eyF { p[k9C$@e} try{ mXN1b! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); nfd?@34"A2 int nCount = input.readInt(); wZ\e3H z nStartPos = new long[nCount]; u1pYlu9IW nEndPos = new long[nCount]; B9;,A;E}; for(int i=0;i<nStartPos.length;i++) 4o)\DB?! { 46.q anh nStartPos = input.readLong(); e)
/u>I nEndPos = input.readLong(); y!{/'{?P } D .oS8' input.close(); [jtj~]&mO } fi-&[llg catch(IOException e){e.printStackTrace ();} d= T9mj.@ catch(Exception e){e.printStackTrace ();} f'zFg["aZS } \PtC Ph7(JV{
U%B]N@ private void processErrorCode(int nErrorCode) );/5#b@<Y { RGPU~L System.err.println("Error Code : " + nErrorCode); e&a[k } xzGsfd 48"Y-TV U~zN*2- //停止文件下载 [0,q7d?" public void siteStop() t2-zJJf8 { GWkJ/EX bStop = true; (j"~]T!)1 for(int i=0;i<nStartPos.length;i++)
y8(?:#ZC fileSplitterFetch.splitterStop(); fb=$<0Ocj rxK[CDM, 'N,NG$G2 } {4jSj0W } {c
EKz\RX //负责部分文件的抓取 wk
<~Y 3u **FileSplitterFetch.java ^VYZ% */ 9C'+~<l package NetFox; r
L|BkN Q\>SF cW|Zgz8vv import java.io.*; #Uk6Fmu] import java.net.*; lJQl$Wx^ 7)It1i- \U => public class FileSplitterFetch extends Thread { 28qWC~/9 8 P y_Y> uXW.
(x7"f String sURL; //File URL i$<v*$.o long nStartPos; //File Snippet Start Position hD.wKX?oO long nEndPos; //File Snippet End Position ?j$8Uy$$ int nThreadID; //Thread's ID MKYE]D; boolean bDownOver = false; //Downing is over 8\t7}8f boolean bStop = false; //Stop identical XK9*,WA9r FileAccessI fileAccessI = null; //File Access interface VqT[ca\ 52R.L9Ai ,7$uh): public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException kk./-G { 3:gO7Uv
this.sURL = sURL; ^>}[[:( 6/ this.nStartPos = nStart; -+2xdLa63 this.nEndPos = nEnd; 2X|jq4 nThreadID = id; .B-,GD} fileAccessI = new FileAccessI(sName,nStartPos);//定位 0+`*8G) } #UnO~IE.m$ GM5 6xZ!2T b0CaoSWo public void run() u^.k"46hn { <T~fh>a while(nStartPos < nEndPos && !bStop) jl%eO. { ?BZ`mrH^ X1QZEl $W]guG try{ TZ_'nB~ URL url = new URL(sURL); H4",r5qw: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y/*Tvb #TJ httpConnection.setRequestProperty("User-Agent","NetFox"); =@/^1.` String sProperty = "bytes="+nStartPos+"-"; T7nX8{l[RG httpConnection.setRequestProperty("RANGE",sProperty);
0
9'o Utility.log(sProperty); v8(u9V%?6 |y=F (6Z jsht2]iq3K InputStream input = httpConnection.getInputStream(); %SFR.U0}yK //logResponseHead(httpConnection); N28?JQha D_kzR mP+yjRw byte[] b = new byte[1024]; d'nuk#r int nRead; n&&U9sf? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) kF~e3A7C { :rc[j@|pH nStartPos += fileAccessI.write(b,0,nRead); ~a,' //if(nThreadID == 1) W
9MZ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m&c(N } 4gt "dfy+ ON!G{=7 e[o
;l
Utility.log("Thread " + nThreadID + " is over!"); &8L\FAY0%9 bDownOver = true; UC$+&&rO //nPos = fileAccessI.write (b,0,nRead); ITPpT } [:'?}p catch(Exception e){e.printStackTrace ();} \`5u@Nzx } ,B>b9,~3a } $F$R4?_ UeeV+xU YQsc(6 //打印回应的头信息 Y|jesa {x public void logResponseHead(HttpURLConnection con) YhR"_ { 6MQ:C'8T&= for(int i=1;;i++) QP0X8%+p { HaUo+,= String header=con.getHeaderFieldKey(i); 5ml}TSMu' if(header!=null) n:] 1^wX# //responseHeaders.put(header,httpConnection.getHeaderField(header)); |H@p^.; Utility.log(header+" : "+con.getHeaderField(header)); glIIJ5d|, else 4u7>NQUDu break; nL~
b } ?saVk7Z[|5 } Ka2tr]+s SXF_)1QO\W aBLb i public void splitterStop() L#bQ`t { qE=OQs9 bStop = true; Lwk- } izo
$0 S*:w\nXP~ =LA@E&,j } _@76eZd g+*[CKO{ 3f8Z?[Bb@ /* sRnMBW. **FileAccess.java X.|0E87 *//文件访问(定位,写) KK|Jach package NetFox; OUMr}~/ import java.io.*; 1ki"UF/ x*V<afLY[ mr.DP~O:9p public class FileAccessI implements Serializable{ !%9I%Ak^ DJUtuex //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \(L^ /]}G) RandomAccessFile oSavedFile; LXl! !i% long nPos; yK3z3"1M? EV$n>. "KwKO8f public FileAccessI() throws IOException GrC")Z|3u { 7C^ nk
z this("",0); OSk9Eb4ld } h (2k;M^s `;@4f|N9 INpub5 public FileAccessI(String sName,long nPos) throws IOException 49GCj`As { m"]ys# oSavedFile = new RandomAccessFile(sName,"rw"); M+:wa@Kl this.nPos = nPos; t68RWzqiG[ oSavedFile.seek(nPos); TaG-^bX8B } HskN(Ho eRbO Hj1 k*^W
lCZ3 public synchronized int write(byte[] b,int nStart,int nLen) X.<R['U&\ { l[ k$O$jo int n = -1; :B~c>: try{ '"^JNb^I oSavedFile.write(b,nStart,nLen); CXZeL 1+ n = nLen; !f6 } YvX I catch(IOException e) [*t EHW { v(~m!8!TI e.printStackTrace (); *E'K{?-K } wt;aO_l xkovoTzV FeLP!oS> return n; B?Skw{& } (%}C Y2EN!{YU !)34tu2 } ZbUf|#GTB ,jmG!qJb ri
~2t3gg /* y
rk#)@/m **SiteInfoBean.java flqTx)xE */ #C^m>o~R package NetFox; Q
# gHD X $f%Ss .EO1{2= public class SiteInfoBean { )VC) } PQ>JoRs T^_9R; private String sSiteURL; //Site's URL D2bUSRrb private String sFilePath; //Saved File's Path .&y1gh!= private String sFileName; //Saved File's Name jL SZ#H private int nSplitter; //Count of Splited Downloading File 0J~4
~@JC1+ &
j43DYw4 public SiteInfoBean() L%FL{G
{//nSplitter的缺省值为5 hr5)$qZW //default value of nSplitter is 5 43XuQg4 this("","","",5); wG
O)!u 4 } c3##:"wr .E&~]< kns]P<g public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) |+;"^<T)l { 2B7&Ll\> sSiteURL= sURL; )Yml'?V" sFilePath = sPath; ?}[keSEh> sFileName = sName; F*f)Dv$p this.nSplitter = nSpiltter; *rLs!/[Z_ sXu]k#I^" lS^0*(Y } @zbXG_J }8HLyK,4 i7FEjjGtG public String getSSiteURL() JFZ p^{ { P*>V6SK>b return sSiteURL; ioggD } fvDwg D6w0Y:A{. 7nmo p7 public void setSSiteURL(String value) z( wXs&z; { Lmb<)YY sSiteURL = value; \IKr+wlN8 } ]NCOi?Odx F~1R.r_Lu scdT/|(U$ public String getSFilePath() E_K7.c4M { :R)IaJ6) return sFilePath; DI_mF#5q } amRtFrc| W4<}w-AoEp a|.u; public void setSFilePath(String value) )-(NL!?` { o0 Ae*Y0 sFilePath = value; (rJvE* } {8' 5 5 F-Q& x?3p3[y public String getSFileName() L" o6)N { ]9' \<uR return sFileName; rhrlEf@ } ]Uu/1TTf +~-|(
y DcOLK\ public void setSFileName(String value) hXCDlCO { D)Zv sFileName = value; .qZ<ROZ } b|N EU-oy Y3[@( + '`RJ,K+[ public int getNSplitter() 5GKz@as8 { R:Lu)d>= return nSplitter; 9cLKb } M0|z^2 6R25Xfm_| 'Gk|&^ public void setNSplitter(int nCount) W;=ZQ5Lw { \21!NPXH2 nSplitter = nCount; bu]bfnYi9 } jzQgDed ] } 1n^xVk-G ~L2Fo~fw `6zoZM7?Y /* SC# **Utility.java Vh&uSi1V */ 99`xY$ package NetFox; @c.pOX[]m, }{$@|6)R Q8_d]V=X: public class Utility { Q-\: u~ #u~8Txt R#0UwRjeF public Utility() %n^]1R# { #r\uh\Cy =#W6+=YN8 v"j7},P@ } L(.5:&Y=` rB4]TQ`c //线程睡眠 G]{)yZ'} public static void sleep(int nSecond) y0xte& { >">-4L17m try{ 139_\=5|U/ Thread.sleep(nSecond); Y9ru~&/o$ } qg_=5s catch(Exception e) ujaaO6oZ7 { o!Y7y1$ e.printStackTrace (); MD +Q_ } +7=3[K } B9]KC i (uSfr]89' //日志 S;Vj5 public static void log(String sMsg) [ACa<U/ { um/iK}O System.err.println(sMsg); 8"+Kz } L!\I>a5C0G cG.4%Va@s_ #jQITS7 public static void log(int sMsg) lyP<&<Y5 { RJ`F2b sYN System.err.println(sMsg); 0L'h5i>H) } O[!]/qP+. } 7v{Dwg biQDupTz jVr:O` /* =m UtBD.; **TestMethod.java /)j:Y:5 */ {a(TT)d package NetFox; {<V{0
s% U<zOR=_ PA Jt M public class TestMethod { rAgb<D@,H 6]M(ElV1H X4gs{kx}| public TestMethod() +5voAx! { ///xx/weblogic60b2_win.exe hDCR>G try{ opd^|xx0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); MFRM M%` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); alyWp SiteFileFetch fileFetch = new SiteFileFetch(bean); ol-U%J fileFetch.start(); +ps(9O/B> } -GH>12YP catch(Exception e){e.printStackTrace ();} :U=*@p4? dW6sA65<Y MGK%F#PM } t~3!| @3i `$05+UU H+` Zp public static void main(String[] args) jx J5F3d { {;q
zz9 | new TestMethod(); "d%o% } w~Aw?75t } v#TU7v?~ 点击下载更多相关资料
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