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/* 4'8.f5 **SiteFileFetch.java Tuy*Df */ QBo^{], package NetFox; liB>~DVC import java.io.*; pV+;/y_ import java.net.*; Te13Af~ 8UZEC-K ?d%}K76V< public class SiteFileFetch extends Thread { zC^Ib&gm>, -
|'wDf?H 0nuFWV SiteInfoBean siteInfoBean = null; //文件信息Bean >y@w-,1he long[] nStartPos; //开始位置 ={oO9.9 long[] nEndPos; //结束位置 ]_,~q@r$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 <Jk|Bmw; long nFileLength; //文件长度 J{ Vl2P?@ boolean bFirst = true; //是否第一次取文件 32Z4&~I boolean bStop = false; //停止标志 BMW4E 5 File tmpFile; //文件下载的临时信息 WQ]pg
" DataOutputStream output; //输出到文件的输出流 mB~&nDU .PxM
#;i2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /P%:u0fX, public SiteFileFetch(SiteInfoBean bean) throws IOException hU{%x#8}lK { &Hqu`A/^ siteInfoBean = bean; 5*r6#[S\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /_|1,x-Kx tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wtKh8^:YD if(tmpFile.exists ()) Kna'5L5" { z=U!D `]v bFirst = false; ^s*} 0 read_nPos(); hd B[H8Q } 2P}RZvUd else N@$%0! { vX\e*
v nStartPos = new long[bean.getNSplitter()]; ao!r6:&v$e nEndPos = new long[bean.getNSplitter()]; #rwR)9iC0 } ^b~5zhY& ^q`*!B9@ %r"GL :Mk}Suf&H } $\
'\@3o ^xwFjQXx :Eyv= = public void run() LayU)TIt { Q/9b'^UJ //获得文件长度 O~el2 //分割文件 Vvj]2V3 //实例FileSplitterFetch `N|CL //启动FileSplitterFetch线程 \t@`]QzG: //等待子线程返回 !Xi>{nV try{ wrU[#g,uvr if(bFirst) A2d2V**Z { MjTKM; nFileLength = getFileSize(); v2{s2kB= if(nFileLength == -1) }[`?#`sW { rYQ@"o0/Y System.err.println("File Length is not known!"); M'iKk[Hjfx } r
`dU
(T! else if(nFileLength == -2) ?xZmm%JF { 1`{ib
System.err.println("File is not access!"); K~-XDLh5Nu } rR~X>+K else S+Yg!RrNqj { F.D1;,x for(int i=0;i<nStartPos.length;i++) m9@n { I:<R@V<~# nStartPos = (long)(i*(nFileLength/nStartPos.length)); a7G2C oM8 } Ui!|!V- for(int i=0;i<nEndPos.length-1;i++) @/L. BfTz { )6^xIh nEndPos = nStartPos[i+1]; c&-$?f
r } <v k$eB8EC nEndPos[nEndPos.length-1] = nFileLength; ^6>|! } g"S+V#R } ZF(=^.gc C/Bx_j(( |LE++t*X~ //启动子线程 T
l(uqY?9 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; oH0F9*+W for(int i=0;i<nStartPos.length;i++) ^\jX5)2{ { 4 GW[GT fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), JSK5x(GlH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Cpv%s 1M nStartPos,nEndPos,i); Tk&9Klo Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "IJMvTmj fileSplitterFetch.start(); >[4|6k|\x } &W//
Ox
)f // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Z3>3&|& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); os^SD&hL // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }AZx/[k
|z nEndPos = " + nFileLength); 6F/
OlK< // fileSplitterFetch[nPos.length-1].start(); [Vp2!" @ ]wem p+UHJ& //等待子线程结束 b:cK >fh0_ //int count = 0; Prz+kPP //是否结束while循环 D s,"E#? boolean breakWhile = false; PFgjWp"Y _|wY[YJ[ Tc5OI' -V while(!bStop) _XNR um4 { UH&1c8y} write_nPos(); @^6OV) Utility.sleep(500); ieRBD6_ breakWhile = true; |SukiXJZF 3nC#$L- u m2s^G for(int i=0;i<nStartPos.length;i++) ?WtG|w { `=$jc4@J if(!fileSplitterFetch.bDownOver) c$<O0dI { 7a]Zws breakWhile = false; 5J\|gZQF break; :Z]hI+7 } FoD/Q
} wt=>{JM if(breakWhile) 4[CBW break; DEp%\sj? mImbS)V +6M+hO] //count++; #JR ,C
-w //if(count>4) 'Kzr-)JS // siteStop(); ivUsMhx>S, } -,fa{ yt- FDd>(!> t6g)3F7 T System.err.println("文件下载结束!"); {F6dSF` } nL(%&z \4 catch(Exception e){e.printStackTrace ();} 6n6VEwYj } _QMHPRELk 90h1e7ZcC &kjwIg{ //获得文件长度 Rp`_Grcd public long getFileSize() !ga(L3vf { 4>"cc@8&~ int nFileLength = -1; jPYe_y try{ NzeI/f3K5 URL url = new URL(siteInfoBean.getSSiteURL()); T^%n!t HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m!#)JFe67 httpConnection.setRequestProperty("User-Agent","NetFox"); {Sr=SE [
4Y
`O '=Kof1 int responseCode=httpConnection.getResponseCode(); SC
$` if(responseCode>=400) <`p75B { (XG[_ processErrorCode(responseCode); ULNAH`{D return -2; //-2 represent access is error Y7:Y{7E7 } 4`UL1)A] Mi/ &$"= ZH;y>Z String sHeader; @( n^S?( +i`Q 7+d jqX@&}3@ for(int i=1;;i++) [C+Gmu { yA?ENAM //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); y3KcM#[ //Utility.log(in.readLine()); .W@(nQ-< sHeader=httpConnection.getHeaderFieldKey(i); m,@1LwBH if(sHeader!=null) gP%|:" { | ,1bkJt if(sHeader.equals("Content-Length")) }l}yn@hYC { @Ge>i5q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |YE,) kiF break; V{T{0b"\U } +w k]iH } 62MRI else F%PwIB~cy break; `\/toddUh[ } dcl.wD0~V } X/E7o92\ catch(IOException e){e.printStackTrace ();} M q^|M~ catch(Exception e){e.printStackTrace ();} ^zaKO'KcV Zp7yaz3y N;Z`%& Utility.log(nFileLength); c7+Djqs d1~_?V'r] 4-7kS85 return nFileLength; uq !; } I #M%%5e \);.0 Ka]J^w;a //保存下载信息(文件指针位置) E\]OySC%C$ private void write_nPos() XMN?;Hj> { kgbobolA try{ NI5]Nz<? output = new DataOutputStream(new FileOutputStream(tmpFile)); )%iRZ\`f output.writeInt(nStartPos.length); LbJtpwz>z for(int i=0;i<nStartPos.length;i++) c Ndw9?Z { x],8yR)R // output.writeLong(nPos); y4xT:G/M output.writeLong(fileSplitterFetch.nStartPos); KqM! ! output.writeLong(fileSplitterFetch.nEndPos); QU^/[75Ea0 } w=f0*$ue+w output.close(); hD nM+4D } eecw]P_? catch(IOException e){e.printStackTrace ();} Qw24/DJK catch(Exception e){e.printStackTrace ();} xT9Yes& } hq/J6 M ,M\j%3 )Vwj9WD //读取保存的下载信息(文件指针位置) JN9^fR09G private void read_nPos() 1s#yWQ { 1&"-*) try{ B0f_kH~p~ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H4M{_2DO int nCount = input.readInt(); ET U-]R 3 nStartPos = new long[nCount]; %x&F4U nEndPos = new long[nCount]; 2HcsQ*H]G for(int i=0;i<nStartPos.length;i++) K!3{M!B { _h0- nStartPos = input.readLong(); JXpoCCe nEndPos = input.readLong(); hVMYB_<~ } !8.En8Z<D- input.close(); 2q)T y9 } C&=x3Cz catch(IOException e){e.printStackTrace ();} n
vm^k catch(Exception e){e.printStackTrace ();} B;VH `*+X } hlX>K ./$
<J6-J @u,+F0Yd private void processErrorCode(int nErrorCode) A2Q[%A { fD'/#sA#' System.err.println("Error Code : " + nErrorCode); nz^nptw } f%c06Un= A:/}` $4=Ne3y //停止文件下载 |Eb&}m:E$ public void siteStop() 4<u;a46Z#M { NdZ)[f:2 bStop = true; 8=:A/47=J for(int i=0;i<nStartPos.length;i++) JfMJF[Mb
fileSplitterFetch.splitterStop(); XM$GQn]B 9qEOgJ @8|Gh]\P } >;,gGH } V{!lk]p}a //负责部分文件的抓取 B22b&0 **FileSplitterFetch.java V"O9n[ | */ !}ilN 1> package NetFox; cv= \g Z D3y>iQd o5P&JBX< import java.io.*; r&SO:#rOSM import java.net.*; 6J\q`q(W( pw=F' Y@N
y`rL=N# public class FileSplitterFetch extends Thread { V{0%xz # g92dw<$> y1iX!m~) String sURL; //File URL VgA48qZ long nStartPos; //File Snippet Start Position ilv _D~|
long nEndPos; //File Snippet End Position e8{^f]5 int nThreadID; //Thread's ID FuuS"G,S boolean bDownOver = false; //Downing is over Ir/:d]N* boolean bStop = false; //Stop identical 9\AS@SH{^T FileAccessI fileAccessI = null; //File Access interface jn^fgH? 3T1P$E" m Wab.|\c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException J?IC~5*2 { ENq"mwV| this.sURL = sURL; 088C| this.nStartPos = nStart; T%kKVr this.nEndPos = nEnd; 9:-T@u nThreadID = id; E5gl ^Q?Z fileAccessI = new FileAccessI(sName,nStartPos);//定位 &:No}6 } cz#_<8'N K_>/lirE? f*<ps
o public void run() .E$q&7@/j { BSKEh"f while(nStartPos < nEndPos && !bStop) 59i] { Fg=v6j4W =Z`0>R` [D[D`gpjA try{ Cw#V`70a URL url = new URL(sURL); Pbe7SRdr^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \Yq0 zVol httpConnection.setRequestProperty("User-Agent","NetFox"); &$#99\/ String sProperty = "bytes="+nStartPos+"-"; h$Tr sO httpConnection.setRequestProperty("RANGE",sProperty); .&iN(Bd Utility.log(sProperty); AS|Rd+. x:
~d@ U5<@<j(@ InputStream input = httpConnection.getInputStream(); yp+F<5o //logResponseHead(httpConnection); wyw <jH 0`n
5x0R 7Z0/(V.- byte[] b = new byte[1024]; WNF9#oN|oT int nRead; "w&/m}E,[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) M&yqfb[ { gz61FW nStartPos += fileAccessI.write(b,0,nRead); W:O0} //if(nThreadID == 1) tD-gc''H // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CH;;V3 } 4AHL3@x C:GvP> /{X_
.fv<v Utility.log("Thread " + nThreadID + " is over!"); d>!p=O`>{q bDownOver = true; Y Pszk5hn //nPos = fileAccessI.write (b,0,nRead); /U*yw5 } WZ?!!
catch(Exception e){e.printStackTrace ();} 2B` 8eb } >nry0 ;z0, } J]fS({(\I GwQn;gkF 2EfflZL3 //打印回应的头信息 |C D}<r(N
public void logResponseHead(HttpURLConnection con) %
{Q-8w! { D{C:d\ e)$ for(int i=1;;i++) D9-Lg% { kCA5|u String header=con.getHeaderFieldKey(i); <AUWby," if(header!=null) Ei~f`{i //responseHeaders.put(header,httpConnection.getHeaderField(header)); $bGD%9
z Utility.log(header+" : "+con.getHeaderField(header)); uvB1VV4 else bx>i6
R2 break; |+NuYz? } g$3>~D } Bq!cY Wj 0 {R/<N n93zD*;5 public void splitterStop() NHkL24ve { Zq*eX\#C bStop = true; FT/amCRyT } aws"3O%
uW G$5m$\K -3hCiKq } 6vp0*ww m mw-a0 DJP6TFT&G /* =!,Gst_ **FileAccess.java )^
<3\e *//文件访问(定位,写) *^h_z;{, package NetFox; @J vZ[T/ import java.io.*; $(q8y/,R*- ZnXejpj)D ax@H"d& public class FileAccessI implements Serializable{ ^ vbWRG~ o4)hxs //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 J70D+ RandomAccessFile oSavedFile; +t]Xj1Q long nPos; 6^YJ] w LfX0Z=< rt b* n~ public FileAccessI() throws IOException tWD|qg_ { m0( E kK this("",0); 1^{`lK~2 } i_U}{|j 2QayM?k8 PZM42"[& public FileAccessI(String sName,long nPos) throws IOException 7+XM3 { fLB1)kTS oSavedFile = new RandomAccessFile(sName,"rw"); vJCf~' this.nPos = nPos; Iql5T#K+ oSavedFile.seek(nPos); =!<G!^ } SS8ocGX T1NH eH> nl@E[yA9[ public synchronized int write(byte[] b,int nStart,int nLen) I/s.xk_i { r
nBOj#N int n = -1; oR %agvc^^ try{ Rd! 2\| oSavedFile.write(b,nStart,nLen); Ew4g'A:H n = nLen; ./w{L"E } @"8R3BN catch(IOException e) uO'/|[`8 { 6?SFNDQ"C e.printStackTrace (); }kPVtSQ } a[C&e,)} =`p&h}h-L gq 4 . d return n; %f!iHo+Z } UqtHxEI%R~ `&g:d E(j 1xTTJyoq } tWk{1IL MY F#A WK;(P4Z /* 4<}A]BQVkJ **SiteInfoBean.java \"d?=uFe */ C EqZ:c package NetFox; SE!L : 2
sSwDF E1W:hGI public class SiteInfoBean { o}~3JBnT I,j3bC I:t^S., private String sSiteURL; //Site's URL ;0j*>fb\q7 private String sFilePath; //Saved File's Path |s|/]aD}o private String sFileName; //Saved File's Name a:u}d7T3e private int nSplitter; //Count of Splited Downloading File N!m%~kS9k< ,qy&|4Jz 0j$OE public SiteInfoBean() F=i!d,S {//nSplitter的缺省值为5 kCp)!hVQ //default value of nSplitter is 5 b1=pO]3u this("","","",5); \n0gTwiO% } bp%S62Dj mP!N<K M(5D'4. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) yW>R RE; { e\.HWV ]I sSiteURL= sURL; GP]TnQ<*; sFilePath = sPath; !!+Da> sFileName = sName; 1S*P"8N}0h this.nSplitter = nSpiltter; wOcg4HlW o? dR\cxj owMmCR } ;[~^(.
f q{@P+2<wF sVoR?peQ public String getSSiteURL() \HG$V>2 { f0FP9t3k return sSiteURL; cY~M4:vgT } ,'_(DJX 2 `&<bt[g w,
7Cr public void setSSiteURL(String value) _BwKY#09Zp { ^j iE9k) sSiteURL = value; 4:`[q E3 } ai^t=
s LE|<O 4d-q!lR pa public String getSFilePath() GLcd9|H { GBr,LN return sFilePath; w"6aha* %7 } zn^ v!:[ 9A<0zt J{!'f|
J public void setSFilePath(String value) X~zRZ0 { P57GqT sFilePath = value; [D hEh@ } 4Pf+]R !l"tI#?6W% QQq/5r4O`q public String getSFileName() {\Ys@FF { ^(g_.> return sFileName; UEN56@eCNf } oX*b<d{\N %HVD^. V 3 69Zu4|u public void setSFileName(String value) !"%S#nrL$ { ]*GnmG:D* sFileName = value; \H[Yyp4 } N5ci};? ,@479ZvvR3 7P
c(<Ui+ public int getNSplitter() V:8@)Hc= { v!KJ|c@m return nSplitter; j^{b^!4~} } =tHD 4I c l9$g7 c`pYc public void setNSplitter(int nCount) pSXEJ 2k { EFD?di)s nSplitter = nCount; I[%M!_+ } ]h0Y8kpd } IOS^|2:, #:Xa'D+ <ipWMZae0F /* r\B"?oqC **Utility.java +2El */ lZBv\JE package NetFox; C,(j$Id vU7&'ca 4NJVW+:2 public class Utility { @??u})^EL z41D^}b fmBkB8 public Utility() k}#@8n|b { !@A|L#* m+p4Mc%u t={po QC~ } Ls(&HOK[p KjC[q //线程睡眠 ?S8$5gA public static void sleep(int nSecond) KoFv0~8Q { /8:gVXZi try{ sFCf\y Thread.sleep(nSecond); 75<el.'H } } mgVC catch(Exception e) G}Gb|sD
Zq { $vz_%Y e.printStackTrace (); 2UQN*_ } Cy]" } V, E9Uds `Y0fst<, //日志 Q:kwQg:~ public static void log(String sMsg) .iN-4"_j1 { kja4!_d System.err.println(sMsg); 2m|Eoc&M_ } ^kc>m$HY JATS6-Lz` D\@e{.$MZ| public static void log(int sMsg) '
l|41wxk { eog\pMv System.err.println(sMsg); {_rZRyr } tWcizj;?wK } u<$S> K<D`(voL tX+0 GLz /* ]6jHIk| **TestMethod.java <WO&$& */ ]r"31.w( package NetFox; Iv Y,9D =PI^X\if88 dl7Riw-J public class TestMethod { (N)r#"FV #(m`2Z`H A9NOeE public TestMethod() Tnzco { ///xx/weblogic60b2_win.exe w:~nw;.T try{ er&uC4Y]a SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); aS c#&{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =x|##7 SiteFileFetch fileFetch = new SiteFileFetch(bean); aeN}hG fileFetch.start(); p~,a= } sURUQ H catch(Exception e){e.printStackTrace ();} x.j Yip Zm"!E6`69 Zkwy.Hq^ } AAIyr703cQ 7j9D;_(.^$ s!8J.hD'I public static void main(String[] args) dSA
[3V { pko!{,c new TestMethod(); D#vn {^c8O } ae9k[=- } Im0+`9Jw 点击下载更多相关资料
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