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/* jF|LPWl **SiteFileFetch.java ivJTE */ /9SNXjfbt package NetFox; :\"g}AX import java.io.*; R|R3Ob.e import java.net.*; \x=!' tW"s^r=95 z9ZS&=> public class SiteFileFetch extends Thread { k;pU8y6Y u^+
(5| V5S6?V\ SiteInfoBean siteInfoBean = null; //文件信息Bean e/F+Tf long[] nStartPos; //开始位置 6yhRcvJ} long[] nEndPos; //结束位置 YbP}d&L FileSplitterFetch[] fileSplitterFetch; //子线程对象 9 N9Q#o$!. long nFileLength; //文件长度 2 D!$x+| boolean bFirst = true; //是否第一次取文件 ky@DH(^> boolean bStop = false; //停止标志 GW!%DT File tmpFile; //文件下载的临时信息 Wo<kKkx2 DataOutputStream output; //输出到文件的输出流 f(.t0{Etq
>^Y)@J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |k=5`WG public SiteFileFetch(SiteInfoBean bean) throws IOException
2>Sr04Pt { uEDvdd#V. siteInfoBean = bean; yvV]|B@sO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o`7B@] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); xqzB=0 if(tmpFile.exists ()) `lN
Z|U { E9:p A5H-j bFirst = false; 7` IO mTk read_nPos(); !E9A=u{ } hSU|rVi else m9Hdg^L { W Z^u%Z nStartPos = new long[bean.getNSplitter()]; TPWqiA?3Cp nEndPos = new long[bean.getNSplitter()]; x*0mmlCb } <77v8=as5 [:cZDVaA| J3AS"+] f<P>IE } q{RT~,% q=_tjg T``~YoIdz public void run() yNN_}9 { znu[i&\= //获得文件长度 21.N+H' //分割文件 WkK.ON^ //实例FileSplitterFetch c4xXsUBQk //启动FileSplitterFetch线程 mY/x|)MmM //等待子线程返回 Ub<^;Du5 try{ ,v>|Ub, if(bFirst) cKH By { C_
(s nFileLength = getFileSize(); hwdZP=X if(nFileLength == -1) YOY{f:ew { t7b\ #o System.err.println("File Length is not known!"); _-bEnF+/0 } F)4;:".zna else if(nFileLength == -2) @-5V~itW { \_PD@A9 System.err.println("File is not access!"); hYv;*] } .GNl31f0 else bAm ,gP { vV 7L
:> for(int i=0;i<nStartPos.length;i++) /2AeJH\- { ] !:0^| nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,?Nc\Q<: } ~4[4"Pi>| for(int i=0;i<nEndPos.length-1;i++) YztW1GvI { Wf!<Qot|R# nEndPos = nStartPos[i+1]; JBvP {5 } !L\P.FP7b nEndPos[nEndPos.length-1] = nFileLength; LFV',1+ } 8f{;oO } xlU:&=| $09PZBF,i O^yDb //启动子线程 6qzy eli fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; u[2B0a for(int i=0;i<nStartPos.length;i++) SYmiDR { !xo; $4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ? {vY3~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cpg+-Zf% nStartPos,nEndPos,i); E]IPag8C Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Wo8.tu-2 fileSplitterFetch.start(); 8ECBi( } UO{3vry48 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %K|+4ZY3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0-a[[hL? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /QK H30E nEndPos = " + nFileLength); S6pvbaMZ // fileSplitterFetch[nPos.length-1].start(); 4c/.#? 0?d}Oj }|!9aojr //等待子线程结束 &*3O+$L //int count = 0; xfJ&11fG2 //是否结束while循环 bTN0 n boolean breakWhile = false; Msea kF y+.E} <.qhW^>X
while(!bStop) o(_~
st< { n:d7 Tv1Z8 write_nPos(); k%S;N{Qh@ Utility.sleep(500); >s+TD4OfY breakWhile = true; #O2e[ E- yC<[LH "P_PqM for(int i=0;i<nStartPos.length;i++) L=9w
3VXS { 5? rR'0 if(!fileSplitterFetch.bDownOver) ek3,ss3 { >'GQB breakWhile = false; |?KdQeL break; PC3-X['[ } wmf#3"n } hi(uL>\ if(breakWhile) MH8 Selnv break; YPY'[j(p`n 9q=\_[\[ +@c-:\K% //count++; HECZZnM //if(count>4) z8"(Yy7m // siteStop(); xf?6_= } J6 VG j=/ O]nZr ~
[4oA$[a| System.err.println("文件下载结束!"); aAX(M=3 } 0,x<@.pW catch(Exception e){e.printStackTrace ();} KW~fW r8 } Vg+jF!\7 u3>Dvl@ %!;6h^@ //获得文件长度 t LzX L* public long getFileSize() a.5^zq7#! { *7yu&a8 int nFileLength = -1; D\H)uV` try{ X+*"FKm S. URL url = new URL(siteInfoBean.getSSiteURL()); mCY+V~^~kz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =H\ig%%E@ httpConnection.setRequestProperty("User-Agent","NetFox"); < x==T4n/ 9W[ ~c"Ku cG`R\$ int responseCode=httpConnection.getResponseCode(); 8+irul{H_ if(responseCode>=400) ?z2k74&M^ { ~e)`D nJ processErrorCode(responseCode); <CJ`A5N return -2; //-2 represent access is error >,v,4,c } +$YluGEJ KT)A{i Kw%n;GFl' String sHeader; USKa6<:{W a!1\,. ::\7s for(int i=1;;i++) L{hP&8$k { >g+ogwZ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); CvwC| AW //Utility.log(in.readLine()); n]/7UH}(<& sHeader=httpConnection.getHeaderFieldKey(i); <bPn<QI if(sHeader!=null) A=7
[^I2 { L}bS"=B[&W if(sHeader.equals("Content-Length")) a'LM6A8~x { 7/"g}
F}Q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); AXV+8$ :R break; H!y%Fa Ti } &></l| hY } Wx;`=9 else cxhS*"Ph break; ,[To)x5o } SBBDlr^P } -q9`Btz catch(IOException e){e.printStackTrace ();} sLE@Cm]k catch(Exception e){e.printStackTrace ();} -r9G5Z!|n MtYi8"+<e. b(lC7Xm Utility.log(nFileLength); \vBpH'hR,' -5Qsc/s& [p%@ pV return nFileLength; 7l"N%e } 5*=a*nD11 `!?SA<a: DP=4<ES%+ //保存下载信息(文件指针位置) hadGF%> O6 private void write_nPos() %m:T?![XO { 9kcp( try{ 4}:a"1P" output = new DataOutputStream(new FileOutputStream(tmpFile)); '&/"_ output.writeInt(nStartPos.length); KmoPFlw for(int i=0;i<nStartPos.length;i++) $:I~y|
!1 { ^c1%$@H // output.writeLong(nPos); S0V%JY;Gv output.writeLong(fileSplitterFetch.nStartPos); $9v:(:!Bm output.writeLong(fileSplitterFetch.nEndPos); #un#~s
7Q } VmLV:"P}^ output.close(); tcYbM+4e } 2.=3:q!H<% catch(IOException e){e.printStackTrace ();} 38IVSK_ catch(Exception e){e.printStackTrace ();} c?i=6CdD' } 9Ny{2m=Ye i]{M G'tg bd[zdL#4K //读取保存的下载信息(文件指针位置) )Yvf9dl private void read_nPos() _5I" %E;S { SRq0y,d try{ k$nQY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); q^],K' int nCount = input.readInt(); >#z*gCO5, nStartPos = new long[nCount]; = :rR%L!a nEndPos = new long[nCount]; hETTD% for(int i=0;i<nStartPos.length;i++) %\?2W8Qv_J { 1<_i7.{k nStartPos = input.readLong(); ($^XF: #5 nEndPos = input.readLong(); {l=! } *
";A~XNx input.close(); T$/6qZew } vS%r_gf( catch(IOException e){e.printStackTrace ();} vKppXm1 catch(Exception e){e.printStackTrace ();} I^'kt[P'FZ } =/MAKi}g Rt{qbM|b& )P\Vd # private void processErrorCode(int nErrorCode) L-[<C/`;t {
V2kNJwwk System.err.println("Error Code : " + nErrorCode); }?xu/C } g:MpN^l =BpX;n< " FI]l<G& //停止文件下载 $-9m8}U(Y public void siteStop() $aTZC>R { Riid,n bStop = true; az3rK4g for(int i=0;i<nStartPos.length;i++) 'S<ebwRd= fileSplitterFetch.splitterStop(); hRZ9[F[[ `-S6g^Y z-nhL= } Q}ho
Y } aloP@U/\Sn //负责部分文件的抓取 (u@p[ncN} **FileSplitterFetch.java lTsl= */ DPIiGRw package NetFox; u(\O ;Ad$Q9)EE bWAhK@epI import java.io.*; 'Uqz , import java.net.*; hh`7b ,+ 4 w$UWfL( lil1$K: i public class FileSplitterFetch extends Thread { aB~?Y+m qazM@ 75}BI&t3k String sURL; //File URL hb7H- Z2 long nStartPos; //File Snippet Start Position "1_eZ ` long nEndPos; //File Snippet End Position =xFw4D9 int nThreadID; //Thread's ID k,O("T[ boolean bDownOver = false; //Downing is over ^.y}2 boolean bStop = false; //Stop identical 7a 4G: FileAccessI fileAccessI = null; //File Access interface ziCTvT r8rU+4\8< TG'_1m*$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -L(F:
{ 6}A1^RB+w this.sURL = sURL; dX-Xzg this.nStartPos = nStart; 4vcUHa|4 this.nEndPos = nEnd; yhg^1l|t, nThreadID = id; hSE\RX 9 fileAccessI = new FileAccessI(sName,nStartPos);//定位 8W
Mhe=[ } (gZKR2hO
w N9I )hB yZ=wT,Y public void run() B uV@w-| { \&|)?'8rS while(nStartPos < nEndPos && !bStop) gtWJR { IGEs1 pTPWToKh
chW 1UE try{ {(#Dou URL url = new URL(sURL); =B_vQJF2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #-kG\} httpConnection.setRequestProperty("User-Agent","NetFox"); 5]DgfwX String sProperty = "bytes="+nStartPos+"-"; 'Y{fah httpConnection.setRequestProperty("RANGE",sProperty); 7<['4*u Utility.log(sProperty); @DG$ Q[J% Ub!MyXd{q InputStream input = httpConnection.getInputStream(); EEmYfP[3 //logResponseHead(httpConnection); CL oc Y S )Q#fP )OxcJPo byte[] b = new byte[1024];
P 0v&*y3Y int nRead; N0h* | while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &y"e|aE { [h20y nStartPos += fileAccessI.write(b,0,nRead); 7xidBVx //if(nThreadID == 1) ibo{!>m // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~LqjWU } k_$:?$ gOaL4tu 0w[#` Utility.log("Thread " + nThreadID + " is over!"); @%mJw
u bDownOver = true; uzjP!qO //nPos = fileAccessI.write (b,0,nRead); (F9U`1~4 } x-0S-1M catch(Exception e){e.printStackTrace ();} :s|" ZR } V4kt&61 } 5lehASBz #5*|/LD e7rD,`NiV //打印回应的头信息 jinDKJ,n; public void logResponseHead(HttpURLConnection con) 2)oT\m { *V}T}nK7 for(int i=1;;i++) TV#X@jQ { @}sxA9a String header=con.getHeaderFieldKey(i); Bo.< 4P if(header!=null) 62{(i'K //responseHeaders.put(header,httpConnection.getHeaderField(header)); _?Q0yVH;, Utility.log(header+" : "+con.getHeaderField(header)); Hg<d%7. else
fX"cQ& break; Z_^i2eJYT } JRfG]u6GU } );X&J:-l+ ro:B[XE 7mG/f public void splitterStop() 4O}ZnE1[ { a B(_ZX'L bStop = true; DL$O274uZ } yb{ud X)P;UVR0 /{h@A~<96 } AXbDCDA Ll4/P[7:? [=f(u
wY>g /* xLID@9Hbu **FileAccess.java OUo N *//文件访问(定位,写) 1<
22, package NetFox; 0^?:Zds import java.io.*; _Z9HOl@ > J4Tk1//b ~cC=DeX public class FileAccessI implements Serializable{ E]T>m!6 zn!H&!8& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8OV;&Z,x RandomAccessFile oSavedFile; ~8fy
qE$ long nPos; VTM*=5|c xLZJ[:gr ,#
i@jB public FileAccessI() throws IOException |AgdD { (T&rvE this("",0); p]z< 43O$ } hh%fmc K'/,VALp q oA?
public FileAccessI(String sName,long nPos) throws IOException 2kG(\+\ { JI"&3H")g% oSavedFile = new RandomAccessFile(sName,"rw"); $-x@P9im this.nPos = nPos; `=}w(V8pc oSavedFile.seek(nPos); $_ &Lp\ } yaDK_fk l*l?aI G0e]PMeFl public synchronized int write(byte[] b,int nStart,int nLen) S9cAw5E(yN { gAFu int n = -1; 9V ]{q try{ Ll2yJ
.C4 oSavedFile.write(b,nStart,nLen); Y! 8 I n = nLen; u;@~P } PM(M c]6 catch(IOException e) +1uAzm4SL { T6Oah:50EM e.printStackTrace (); zYCS K~-GW } {Yt@H cPx]:sC 7{"urs7 T return n; e-@.+f2CC } J>o%6D L
lNd97Z o.o$dg(r! } GC#s;X R&vV!d O7})1|>1 /* @7}]\}SR **SiteInfoBean.java [B2g{8{! */ $vC}Fq package NetFox; Hv3<gyD %}`zq8Q; j0X Jf< public class SiteInfoBean { ~uUN\qx52 &"R`:`XF D_)i%k\ private String sSiteURL; //Site's URL .)Wqo7/Gx private String sFilePath; //Saved File's Path #a$k3C private String sFileName; //Saved File's Name uOv0ut\\G private int nSplitter; //Count of Splited Downloading File ab@1JAgs uXm_ pQpF
U3 -cH public SiteInfoBean() A,u}p rwH {//nSplitter的缺省值为5 Q7{/ T0 //default value of nSplitter is 5 k@=w? m this("","","",5); c>)_ I } ^)i1b:4 _@_w6Rh YacLYo# public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) U:+wt}-T" { cd3;uB4\, sSiteURL= sURL; vNIQ1x5Za sFilePath = sPath; 5m\T~[`% sFileName = sName; tEl_a~s*3? this.nSplitter = nSpiltter; 6_a~
4_# (-bLP xL#UMvZ>;h } rI;84=v2&9 n/vKxtW 3?Tk[m1b public String getSSiteURL() s F!nSr {
6Sr}I,DG return sSiteURL; i286`SLU } VqBb=1r%o7 01&J7A2 D)){"Q!b public void setSSiteURL(String value) 0hoi=W6AQ { ` Clh; sSiteURL = value; [W,} & } Y!*F-v@ w^N3Ma ]O 8hkGa public String getSFilePath() ^R;rrn{^ { %[J|n~8_Z return sFilePath; @/ G$
C9< } ZT1IN6;8W DB>.Uf" x!^u$5c public void setSFilePath(String value) C'oNGOEd { p8_
CY[U sFilePath = value; V^/]h
u } \95O J%SuiT$L&Y t
IO 'ky public String getSFileName() 8-uRn38 { 8AQ@?\Rc"2 return sFileName; ZGZ+BOFL } eA'1 9}*<8%PSt, @teNT" public void setSFileName(String value) 8sz|9~ { o'auCa,N sFileName = value; dRu|*s } Z&[_8Y5j hQPNxpe 4o``t] public int getNSplitter() qG?svt { H(,D5y`k1 return nSplitter; (yxHXO9N } 7,:$, bL j]5mzz~ OS7^S1r- public void setNSplitter(int nCount) QxS=W2iN { V9cKl[ nSplitter = nCount; GiGXV @dq } J_ y+.p-
5 } {j!+\neL c3]X#Qa#m$ [8$K i$; /* [t }\8^y **Utility.java \I[50eh| */ e_Un:r@) package NetFox; gtVnn]Jh yhzZ[vw7k K|^'`FpPO public class Utility { 'vc>uY ;eQOBGX9 $7
FT0?kG public Utility() /ij)[WK@ { 66 @#V H4{CiZ guc[du } B;=-h(E}vJ %S9YjMR@ //线程睡眠 ecIZ+G)k public static void sleep(int nSecond) H)VzPe# { { |ryV7VJ8 try{ T\3aT Thread.sleep(nSecond); \:vHB! 2E } E=eK(t(8 catch(Exception e) m?)REE { 7>,(QHl e.printStackTrace (); IVdM}"+ } :Y)jf } O~~WP*N HmQ.' //日志 D6L5X/# public static void log(String sMsg) ,C97|6rC { g*]/HS>e<G System.err.println(sMsg); 43m@4Yb } 2/F";tc\' e:uk``\ 8;\ public static void log(int sMsg) 56`Tna,t { )F,IPAA# System.err.println(sMsg); jRGslak; } cM 5V%w } 1XXuFa& dgp1 B\ ~H4wsa39 /* cN3!wE **TestMethod.java xP+`scv*m# */ )Bw}T package NetFox; ~;S 3LW_qX CR8szMa public class TestMethod { <N'v-9=2jl !%X#;{ tN1xZW: public TestMethod() OUFx M { ///xx/weblogic60b2_win.exe {16]8-pe try{ KBOp}MEz SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %iR"eEE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); SE<?l SiteFileFetch fileFetch = new SiteFileFetch(bean); 1tIJ'#6 fileFetch.start(); pt$\pQ } Ek6z[G`
O catch(Exception e){e.printStackTrace ();} i@m@]-2 N3(.7mxo Aw$+Ew[8 2 } yQ!I`T>a \)`OEGdOR\ ItD&L
)) public static void main(String[] args) )lZoXt_3 { NH'Dz6K5 new TestMethod(); MSaOFv_Q } MAQ(PIc>T } )_olJCdaP^ 点击下载更多相关资料
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