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/* ]EG8+K6 **SiteFileFetch.java 08! _B\ */ 4t>"-/ package NetFox; gAf4wq import java.io.*; <`wOy[e import java.net.*; *vq75k$7 9~jS_Y)" ^dE[ ; public class SiteFileFetch extends Thread { *kcc]*6@s $aN%[ >Psq" Xj SiteInfoBean siteInfoBean = null; //文件信息Bean )<qL8#["U long[] nStartPos; //开始位置 w\{#nrhYU long[] nEndPos; //结束位置 Nbv b_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 -= izu]Fb, long nFileLength; //文件长度 }Z<Sca7 boolean bFirst = true; //是否第一次取文件 gyhy0 boolean bStop = false; //停止标志 #&1gVkvp File tmpFile; //文件下载的临时信息 afzx?ekdF DataOutputStream output; //输出到文件的输出流 GSd:Plc% Hi*|f!,H? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) i
^2A:6}? public SiteFileFetch(SiteInfoBean bean) throws IOException bbDm6, { owb+,Gk( siteInfoBean = bean; {3kz\FS //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0rm(i*Q tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *'\ HG if(tmpFile.exists ()) Sw5:T { PN:`SWP bFirst = false; OhlK;hvdB* read_nPos(); 62y:i } xtKU;+# else leI ]zDk= { E'5KJn;_7 nStartPos = new long[bean.getNSplitter()]; g1.u1} nEndPos = new long[bean.getNSplitter()]; `AvK=] } q/d?cLgl V>GJO (9 lyyf&?2 J9DI(` } n&zEYCSI WWH<s%C &m
GU public void run() }xi?vAaTl { Gf:dN_e6. //获得文件长度 B& R?{y* //分割文件 -K H"2q //实例FileSplitterFetch Fq5u%S //启动FileSplitterFetch线程 "*N#-=MJF //等待子线程返回 C=v+e%)x@ try{ B3u/
y if(bFirst) Oh>hyY)} { z!18Jh nFileLength = getFileSize(); \8s:I+[HH if(nFileLength == -1) [{Q$$aV1 { >goHQ30: System.err.println("File Length is not known!"); M X7Ix{ } z@pa;_ else if(nFileLength == -2) [@8 po-()L { ZGsd cnz System.err.println("File is not access!"); M_.Jmh<&& } w/rJj* else &zJ*afi) { }4H}*P> + for(int i=0;i<nStartPos.length;i++) 0Q?%B6g$m[ { u%E8&T8, nStartPos = (long)(i*(nFileLength/nStartPos.length)); xpo^\E?2 } n:) [%on for(int i=0;i<nEndPos.length-1;i++) vCSC: { kR^h@@'F" nEndPos = nStartPos[i+1]; \[.qN } y
5=rr3%v nEndPos[nEndPos.length-1] = nFileLength; wVnmT94 } J:>o\%sF } ;in-)`UC! VP^Yf_ G/~gF7 //启动子线程 6
R})KIG fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; S-Vj$asv! for(int i=0;i<nStartPos.length;i++) NCG;`B`i { q*`
m%3{ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), LP|YW*i=IQ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), SJMbYjn0J nStartPos,nEndPos,i); C58o="L3S Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (l-=/6- fileSplitterFetch.start(); S7nx4c2xK~ } Pmd[2/][ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), HF_8661g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~n%Lo3RiP // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", J`GL_@$q nEndPos = " + nFileLength); |Rkw/5 // fileSplitterFetch[nPos.length-1].start(); REK):(i7P 5V =mj+X? g)r{LxT# + //等待子线程结束 KA?%1s(kJ //int count = 0; UdM2!f //是否结束while循环 M|%bxG^l boolean breakWhile = false; B>!mD{N @P75f5p}< w?|qKO while(!bStop) gH'hA' { ,f:K)^yD write_nPos(); };9s8VZE Utility.sleep(500); .<z7$lz\ breakWhile = true; v^t7)nx^ \ f+;X KRT&]2 for(int i=0;i<nStartPos.length;i++) .nrbd#i- { =d^hiR!GN if(!fileSplitterFetch.bDownOver) [Tbnfst { W4 d32+V breakWhile = false; vn$=be8l4 break; ``VE<:2+ } Q. O4R_H } n(eo_.W2| if(breakWhile) s_fe4K break; YF-E1`+?< 63Gq5dF .9B@w+=6 //count++; S!=R\_{u$ //if(count>4) 8&"Jlz
| // siteStop(); Qr~!YPK\ } [(#)9/3, GEf=A.WAfw M`'DD-Q System.err.println("文件下载结束!"); _1G/qHf^S } w[gt9]}N catch(Exception e){e.printStackTrace ();} `j)56bR } 6#CswSpS $RY GAh [5p9p1@u{C //获得文件长度 *.>@ public long getFileSize() U- 1UWq { 2h51zG#qd int nFileLength = -1; C@`#@1X try{ B?8*-0a'[ URL url = new URL(siteInfoBean.getSSiteURL()); i]k)wr( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _h}(jEd! httpConnection.setRequestProperty("User-Agent","NetFox"); BX[IWP\% ANw1P{9* Q?>r:vMi int responseCode=httpConnection.getResponseCode(); )?#K0o[< if(responseCode>=400) -kLBq:M { :K2
X~Ty processErrorCode(responseCode); o<!H/PN return -2; //-2 represent access is error N^oP,^+U } HLV8_~gQPf
d6tLCQ j`.&4.7+ String sHeader; }WC[<AqI v;
#y^O
|Vz)!M for(int i=1;;i++) ' abEY { X(BxC<!D. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); o}KVT%} //Utility.log(in.readLine()); 4lX_2QT]E sHeader=httpConnection.getHeaderFieldKey(i); /FXvrH( if(sHeader!=null) QlMLWi {
B(s^(__] if(sHeader.equals("Content-Length")) Q}B]b-c+E { Y3[KS;_fr9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); A? B+ break; xgIb6<qwY } RA<ky*^dr } Het"x else 5Q8 H8!^
break; $nmt&lm } au50%sA~
} Xv!Gg6v6 catch(IOException e){e.printStackTrace ();} X5.9~ catch(Exception e){e.printStackTrace ();} ~Oq
_lM l59\Lo: c;q=$MO` Utility.log(nFileLength); 6}R*7iMs wMCg`rk OV;VsF return nFileLength; gkxHfm } tTTHQ7o*BD qQ)1+^ 7$%G3Q|)L //保存下载信息(文件指针位置) YL|)`m0-^5 private void write_nPos() CQ6I4k { $[`rY D/. try{ &D{!zF output = new DataOutputStream(new FileOutputStream(tmpFile)); M.y!J
output.writeInt(nStartPos.length); R$l-
7YSt for(int i=0;i<nStartPos.length;i++) r{r~!=u { HM)D/CO,? // output.writeLong(nPos); 64U|]gd$ output.writeLong(fileSplitterFetch.nStartPos); z0+JMZ/ output.writeLong(fileSplitterFetch.nEndPos); `!N}u } deYv&=SPl output.close(); UVlB= } .up[wt gN catch(IOException e){e.printStackTrace ();} GO2q"a catch(Exception e){e.printStackTrace ();} D<FQVdP } q
6UZ`9&z X(x,6cC :35h0;8+ //读取保存的下载信息(文件指针位置) ;0m J4G private void read_nPos() {G vGV { n6Uh%rO7S| try{ j~\FDcG*ed DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); N}VoO0 I int nCount = input.readInt(); WG A&Lr nStartPos = new long[nCount]; /q>ExXsEC nEndPos = new long[nCount]; 3xW:" for(int i=0;i<nStartPos.length;i++) wxK71OH { U3B&3K} ~ nStartPos = input.readLong(); v7@"9Uw} nEndPos = input.readLong(); ,{:qbt } -:d{x# input.close(); S_Nm?;P } .4E24FB[f? catch(IOException e){e.printStackTrace ();} }*9F `=%F catch(Exception e){e.printStackTrace ();} 5s^vC2$) } |*J;X<Vm xzY/$? 8g{Mv#b% private void processErrorCode(int nErrorCode) ^pe/~ :a { '=+N
)O System.err.println("Error Code : " + nErrorCode); ~2hzyEh } Y{e,I-"{ L T`T~|pz @qcUxu 4 //停止文件下载 L=Aj+ public void siteStop() E%E`\mFD { R6 ej bStop = true; qOpwl*?x+ for(int i=0;i<nStartPos.length;i++) n)a/pO_ fileSplitterFetch.splitterStop(); _G-6G=q /J-.K*xKt S`mB1(h } 2<0".5+I } c{D<+XM //负责部分文件的抓取 )2W7>PY **FileSplitterFetch.java `r=^{Y */ X0ugnQ6 package NetFox; 9b-4BON{P 8TH;6-RT SLkgIb~'X import java.io.*; 1n2Pr'|s import java.net.*; :SN? t ixM#|Yq :G9d,B7* public class FileSplitterFetch extends Thread { yP-$@Ry ,{iMF
(Nj lv.h?"Ml String sURL; //File URL fRk'\jzT long nStartPos; //File Snippet Start Position <uoVGV5N long nEndPos; //File Snippet End Position %|/\Qu int nThreadID; //Thread's ID >PdrLwKS boolean bDownOver = false; //Downing is over uW}M1kq?+l boolean bStop = false; //Stop identical gQhYM7NP{5 FileAccessI fileAccessI = null; //File Access interface NV}fcZ .gRb' nyhHXVRH public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9ygNJX'~ {
_,Q -)\ this.sURL = sURL; M!VW/vdywL this.nStartPos = nStart; #cD$
DA this.nEndPos = nEnd; gHL:XW^ nThreadID = id; 0Iyb} fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;L],i<F } 2I=4l \dB z-H'@ 0yUn~'+(Sp public void run() *&_(kq z'1 { {c
$8?6 while(nStartPos < nEndPos && !bStop) M6Ik 'r"M { 33"!K>wC aNICSxDN PGTjOkx try{ se _Oi$VZ{ URL url = new URL(sURL); |hvclEu, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ncR]@8 httpConnection.setRequestProperty("User-Agent","NetFox"); ob)c0Pz String sProperty = "bytes="+nStartPos+"-"; \3rgwbF httpConnection.setRequestProperty("RANGE",sProperty); i|!R*" Utility.log(sProperty); >\lBbqa#
}mk z_P(Z ? a*yK8S InputStream input = httpConnection.getInputStream(); (x[z=_I%` //logResponseHead(httpConnection); ZoqE,ucH M"OCwBTU 99Nm? $g byte[] b = new byte[1024]; %F0.TR!!n int nRead; %$R]NL| while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +4]f6Zz({ { )c0 Dofhg nStartPos += fileAccessI.write(b,0,nRead); kbx4I? //if(nThreadID == 1) 7a%)/)<D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); thh0~g0/ } =kW7|c5Z n8) eC2A >
a 8'MK Utility.log("Thread " + nThreadID + " is over!"); q+9c81b bDownOver = true; D'_w
* //nPos = fileAccessI.write (b,0,nRead); $viZ[Lu!m } @$|bMH*1: catch(Exception e){e.printStackTrace ();} 8/CK(G } @ql S #( } ekSSqj9"; ;c# jO:A5 pJ@D}2u( //打印回应的头信息 (5=B^9{R public void logResponseHead(HttpURLConnection con) Zx%6pZ(. { R\lUE,o]<q for(int i=1;;i++) f]kG%JEK { 3ZL<6`Y F String header=con.getHeaderFieldKey(i); ^" UZ.@sq' if(header!=null) ZcrFzi //responseHeaders.put(header,httpConnection.getHeaderField(header)); p y%RR*4# Utility.log(header+" : "+con.getHeaderField(header)); +nQp_a1{9% else }m.45n/ break; p) m0\ } t`"pn<
} 9at_F'>R GNI:k{H@"? pn
aSOyR public void splitterStop() @`:z$52 { e6I7N?j bStop = true; %1kIaYZ } \) g?mj^ L-Pq/x2r 7toDk$jJRg } '>#8
F. /yTPb #-bz$w#* /* (cm8x **FileAccess.java 5/m}v'S% *//文件访问(定位,写) %. W56 package NetFox; yuq2) import java.io.*; |sPUb;&~ J*+[?FXRL XW q@47FR public class FileAccessI implements Serializable{ V5bB$tL}3 4*V[^mht //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p?'&P! RandomAccessFile oSavedFile; K5}0!_)G long nPos; i^"!"&tW# k83S.*9Mx =&roL7ps public FileAccessI() throws IOException |a>,FZv8e { !p{CsR8c this("",0); n|eM}ymF+ } o8u;2gZx ZP9x3MHe w7b\?]}@ public FileAccessI(String sName,long nPos) throws IOException WGHf?G/s { ].Xh=7&2{ oSavedFile = new RandomAccessFile(sName,"rw"); l9f%?<2D this.nPos = nPos; {fS~G2@1 oSavedFile.seek(nPos); )F,z pGG } J7+[+Y Q+ZZwqyxD q@vqhE4 public synchronized int write(byte[] b,int nStart,int nLen) '+7"dHLC; { f-Zi!AGh> int n = -1; ~{-9qOGw; try{ 2ae"Sd!-2 oSavedFile.write(b,nStart,nLen); ]D[\l$( n = nLen; }/MmuPp } )Bu#ln" catch(IOException e) 8yk4#CZ { OxN[w|2\4 e.printStackTrace (); %a']TX } Lr0:yo zJov*^T-C m}6Jdt'| return n; q1Mt5O} } ]EdZ,`B4 2d&]V]:R* ic}mru } 7MQh,J!" F ESl#.} R5&<\RI0 /* zxkO&DGRbN **SiteInfoBean.java /QT>" */ q7<=1r+ package NetFox; EvH/d4V; 29cx( '2
Y8 public class SiteInfoBean { -ijzo%&qA m^
Epw4eg Kg`P@ private String sSiteURL; //Site's URL 9WI5\`*" private String sFilePath; //Saved File's Path X *EseC private String sFileName; //Saved File's Name "!CVm{7[ private int nSplitter; //Count of Splited Downloading File z?pi/`y8> bg|dV ;M~9Yr=1 public SiteInfoBean() >'4$g7o, {//nSplitter的缺省值为5 @ qi|}($ //default value of nSplitter is 5 oY0*2~sg this("","","",5); 3iUJ!gK } "?<(-,T K1o>>388G KDP"z public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) rIb~@cR) { {~w( pAx sSiteURL= sURL; -v-kFzu sFilePath = sPath; %8wBZ~1- sFileName = sName; y5F"JjQAa this.nSplitter = nSpiltter; |?ZU8I^vW ZjY,k RyU8{-q } TGU7o:2 $gN\%X/n"1 hW'b'x< public String getSSiteURL() egBk7@Ko { 8)>T>-os return sSiteURL; wEwRW } vq.o;q / ZZZ`@pXm; Thu_`QP^ public void setSSiteURL(String value) ij#v_~g3 { q'a]DJ` sSiteURL = value; rk4KAX_[ } +H?g9v40 I'^XEl? 6"Lyv public String getSFilePath() 6P}?+ Gc { ]kx<aQ^ return sFilePath; ^;h\#S[% } TB?'<hD: f0Q! lMv xb%Q[V_m public void setSFilePath(String value) }!k?.(hpE { ;dMr2y`6 sFilePath = value; }No #_{ } JP0aNu .a :7|L#a ,/GFD[SQ public String getSFileName() !vRN'/(Vyu { :RukW.MR return sFileName; lhJY]tQt/ } kjp~:Bg_( t(V2 p/Q< VV public void setSFileName(String value) |v@_~HV { ~Q
Q1ZP3 sFileName = value; &Ep$<kx8 } TCzlu#w h$$JXf UMBeY[? public int getNSplitter() FN/l/OSb { H1%o)'Kut4 return nSplitter; [h-NX } yK"\~t[@X: #K@!jh)y^ 0YL*)=pD, public void setNSplitter(int nCount) Fje
/;p { *oIIcE4g7 nSplitter = nCount; /6[vF)& } !Sy9v } roAHkI +}(]7du g#l!b%$ /* YqXN|& **Utility.java n#WOIweInf */ muF&t'k package NetFox; |5FEsts[
s0vcGh#w q[vO
mes public class Utility { WuF\{bUh qFDy)4H) ;sf'"UnL public Utility() ? N]bFW"t| { -V@ST9` xDekC~Zq X=6L-^o) } x~8R.Sg /i Xl]< //线程睡眠 &.z-itiV public static void sleep(int nSecond) c<cYX;O { jL4"FTcE]3 try{ QJkiu8r Thread.sleep(nSecond); Ebi~gGo } p((. (fx catch(Exception e) s%>u[-9U { M_75bU e.printStackTrace (); w8>bct3@ } tC f@v'1t } ^( C,LVP< rvnm*e, //日志 +&_n[; public static void log(String sMsg) *x2u { }!s$
/Kn System.err.println(sMsg); Xe/7rhov } Mwj7*pxUh .&^M
Z8 l>HB 0o public static void log(int sMsg)
zn*i { MD> E0p) System.err.println(sMsg); nu|odP } .J5or } X)9|ZF2` `wLmGv+V kwt;pxp i /* 9x8Ai **TestMethod.java uA%F0oM */ tE=$# package NetFox; Rg~[X5 Qm?o^%a <jVk}gi)Jp public class TestMethod { "r{
^Y?? B"RZpx {+QQ<)l^tJ public TestMethod() 9>5]y}.{ { ///xx/weblogic60b2_win.exe V3\}]5 try{ )jRaQ~Sm SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ou&7v<)x4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QlxlT $o} SiteFileFetch fileFetch = new SiteFileFetch(bean); j%*<W> O fileFetch.start(); FkoN+\d } lGX_5R catch(Exception e){e.printStackTrace ();} 9n".Q-V;k 2)
A$bx Bk1gE(( } `qbsDfq@ ?DJ,YY9P 4\8k~# public static void main(String[] args) en gh3TZC { 4T#Z[B[ new TestMethod(); #1f8A5< } )'?@raB! } UBy:W^\g 点击下载更多相关资料
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