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/* j@1cllJkh **SiteFileFetch.java x=Z\c,@O */ La9v97H: package NetFox; RpPbjz~ import java.io.*; |@?B%sY import java.net.*; 8"/5Lh( c9imfA+e 6wC|/J^ public class SiteFileFetch extends Thread { .}>d[},F 'b#RfF,7H} V{@
xhW0 SiteInfoBean siteInfoBean = null; //文件信息Bean wU,{5 w long[] nStartPos; //开始位置 .WM 0x{t/ long[] nEndPos; //结束位置 sKYb&2wJ FileSplitterFetch[] fileSplitterFetch; //子线程对象 =<w6yeko long nFileLength; //文件长度 7^,C=2
boolean bFirst = true; //是否第一次取文件 JR{3n* boolean bStop = false; //停止标志 WqP>cl2Lm File tmpFile; //文件下载的临时信息 `l,=iy$ DataOutputStream output; //输出到文件的输出流 WGjT06a\ k_%2Ok //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) tz0@csXV public SiteFileFetch(SiteInfoBean bean) throws IOException n B4)% { ^]c/hb|X siteInfoBean = bean; n^P=a'+ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Su`LB z" tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V&`\ s5Q if(tmpFile.exists ()) _"n1"%Ns { 4]9+ bFirst = false; &09z`*, read_nPos(); jqxeON } KtzoL#CT else ]:`q/iS& { tu\;I{h=0 nStartPos = new long[bean.getNSplitter()]; "&?F6Pi nEndPos = new long[bean.getNSplitter()]; PmOm> } ppr95Y]^ N^7Qn*qt[ ?95^&4Oh0 &.z: i5&o! } N:'v^0 Eyi^N0 `<&RZB2 public void run() ,73kh { NIufL
}6\ //获得文件长度 A6ipA/_ //分割文件 t"M&Yy //实例FileSplitterFetch "?EoYF_ //启动FileSplitterFetch线程 gTWl];xja //等待子线程返回 +c4]}9f! try{ \Z9+U:n if(bFirst) q[p+OpA { {^>dQ+S x7 nFileLength = getFileSize(); K] ;` if(nFileLength == -1) K{)N:|y%!$ { 3wZA,Z
System.err.println("File Length is not known!"); @wO"?w( } ol]"r5#Q_H else if(nFileLength == -2) 8CKN^8E { *,qW9z System.err.println("File is not access!"); 55xaZ#| } '>dsROB-> else |uo<<-\jTO { _kUf[& for(int i=0;i<nStartPos.length;i++) #xL^S9P { Zwj\Hz. nStartPos = (long)(i*(nFileLength/nStartPos.length)); t.wB\Kmt\ } 4AdZN5 for(int i=0;i<nEndPos.length-1;i++) 0>hV?A { k(l nEndPos = nStartPos[i+1]; J6pQ){;6 } tlhYk=yq nEndPos[nEndPos.length-1] = nFileLength; Y1RiuJtL } ^q``f%Xt } L=Cm0q 3v XBQ]A89G 0}:- t^P //启动子线程
gC^4K9g fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q/[|/uNw? for(int i=0;i<nStartPos.length;i++) ^M?O { ^8dd fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7hAFK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), g/H:`J nStartPos,nEndPos,i); y9W6e" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -I."= c% fileSplitterFetch.start(); L"|4
v } y\-f{I // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AQX~do\A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Qw>ftle // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", W
vh3Y,|3 nEndPos = " + nFileLength); bvHF;Qywg // fileSplitterFetch[nPos.length-1].start(); 5 :O7c Br ^Mw>'*5^ s;oDwT1 //等待子线程结束 +EI+@hS //int count = 0; TI
'( //是否结束while循环 9
Yv;Dom boolean breakWhile = false; Wjf UbKg0 Y1e>P q2Xm~uN`) while(!bStop) k.Tu#7 { aD
yHIh8 write_nPos(); aXi5~,Ks_ Utility.sleep(500); o$dnp`E breakWhile = true; 7WZ).,qxY }bj
dK J:s^F
n for(int i=0;i<nStartPos.length;i++) >uMj}<g#Z? { SQ*dC if(!fileSplitterFetch.bDownOver) _-^bAr`z { /?<tjK' "H breakWhile = false; MUo}Qi0K break; _T[ =7 cn } w!$|IC } tI651Wm9 if(breakWhile) l2>ka~ break; 4VtI8f! z#qlu= dz^l6<a"n //count++; 4;G:.k!K //if(count>4) IyTL|W6 // siteStop(); CiE } A`E7V}~ 9uk}r; %9 1~!
4 System.err.println("文件下载结束!"); VCOz?Y* } 4]c.mDo[T catch(Exception e){e.printStackTrace ();} hrfu\cI } WfbG }%&J sZ`C
"1cX 5<o8prtB //获得文件长度 bZ!*s public long getFileSize() Uj!3H]d { H{*~d+:ol int nFileLength = -1; 2qEm,x'S try{ CA2 , URL url = new URL(siteInfoBean.getSSiteURL()); 0IHcyb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZA4NVt.yN httpConnection.setRequestProperty("User-Agent","NetFox"); <0my,hAK !acm@"Ea gg;&a( int responseCode=httpConnection.getResponseCode(); O 0Fw!IQk if(responseCode>=400) u&)+~X { rUC@Bf processErrorCode(responseCode); e1'<;;; L return -2; //-2 represent access is error v-`RX;8 } o&2(xI2 %T:~N<8) 56i9V9{2 String sHeader; /15e-(Zz/ y8T%g( u<`CkYT for(int i=1;;i++) ve|:z { 8 VMe#41 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); xA|72!zk0P //Utility.log(in.readLine()); ><odBM- sHeader=httpConnection.getHeaderFieldKey(i); V+7x_>!&) if(sHeader!=null) P;R`22\3 { =]r<xON%S if(sHeader.equals("Content-Length")) qaK9E@l { 8=;'kEU nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); JGH;&UYP break; `Q d_Gu,M } >;Er[Rywr } KCR6@{@ else I$@0FSl break; :BLD&mb"Y } {"<D$*K~ } 7hPiPv
catch(IOException e){e.printStackTrace ();} ;0lHi4 c0 catch(Exception e){e.printStackTrace ();} -3
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'UGkL; .Y}~2n Utility.log(nFileLength); Ba$&4?8 M*|,05> gkDyWZG B return nFileLength; k&-SB - } m[~fT(NI .W_'6Q+ QKW;r //保存下载信息(文件指针位置) >BU"C+a8g private void write_nPos() d{?X:*F { sem:" try{ tOx)t$ix output = new DataOutputStream(new FileOutputStream(tmpFile)); eH.~c3o output.writeInt(nStartPos.length); _tJp@\rOz= for(int i=0;i<nStartPos.length;i++) rPf<8oH { b}DxD1*nsI // output.writeLong(nPos); G:'hT=8 output.writeLong(fileSplitterFetch.nStartPos); 6CoDn(+z output.writeLong(fileSplitterFetch.nEndPos); /"w%?Ea } 0[(TrIpXl output.close(); @edx]H1~^ } Z(F`M;1>xI catch(IOException e){e.printStackTrace ();} QMUmPx& catch(Exception e){e.printStackTrace ();} !zc?o?~z } WCc7 MK d\% |!ix : b9X?%L~ //读取保存的下载信息(文件指针位置) zo!e<>o private void read_nPos() T0=8 U;
= { mQ# 0c_ try{ oC"1{ybyl DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1ztL._Td int nCount = input.readInt(); -\ {.]KL nStartPos = new long[nCount]; 3iKBVN nEndPos = new long[nCount]; #^|"dIZ_M for(int i=0;i<nStartPos.length;i++) ma__LWKM, { ;JQ:S~K9 nStartPos = input.readLong(); Fp3NWvu nEndPos = input.readLong(); h+,Eu7\88 } PNNY_t +I input.close(); l_ Eeus } 46p%y catch(IOException e){e.printStackTrace ();} kkvG= catch(Exception e){e.printStackTrace ();} re\pE2&B } J['pBlEb\ y2nwDw(xF P*9vs %W private void processErrorCode(int nErrorCode) :=CRsQAn { UBj"m< System.err.println("Error Code : " + nErrorCode); (RhGBgp } >M `ryM2=D S5a?KU 3m2hB%SNb //停止文件下载 -SF*DZ public void siteStop() ix.I) { x^ 0MEsR bStop = true; h5+L/8+J^z for(int i=0;i<nStartPos.length;i++) 5Vq&w`sW fileSplitterFetch.splitterStop(); -pb>=@Yq TOH!vQP +;@p'af!9 } \xtY\q,[ } I=vGS //负责部分文件的抓取 y9/x:n&] **FileSplitterFetch.java OE{PP9eh */ s,~p}A%0 package NetFox; #.Q8q A9:dHOmT^U [pAW' : import java.io.*; reO^_q' import java.net.*; `X mT)C q!r4"#Y"@Z .YYLMI public class FileSplitterFetch extends Thread { #YEOY#
mrc% 6Ri .66_g@1 String sURL; //File URL ggP#2I\ long nStartPos; //File Snippet Start Position liU/O:Ap long nEndPos; //File Snippet End Position X3# AYn, int nThreadID; //Thread's ID i,3[0*ge boolean bDownOver = false; //Downing is over ` D9sEt_/ boolean bStop = false; //Stop identical 2PaRbh{" FileAccessI fileAccessI = null; //File Access interface ..Dr?#Cr 6/4?x)l3- Hea76P5$P+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException w%Bo7 'o)V { r=S6yq} this.sURL = sURL; c;M&;'#x this.nStartPos = nStart; FxK2 1 this.nEndPos = nEnd; =o<iBbK#| nThreadID = id; O)Wc\- fileAccessI = new FileAccessI(sName,nStartPos);//定位 :)P Aj } M@wQ6ow _7k6hVQ VK~ OL public void run() u djahI<{ { )9PP3" I while(nStartPos < nEndPos && !bStop) L)mb.U$`c| { u` j9m@` Uiz#QGt "c'K8,+? try{ uyfH;9L5$ URL url = new URL(sURL); vz^w%67& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .3Ag6YI0N httpConnection.setRequestProperty("User-Agent","NetFox"); :SUU)jLq String sProperty = "bytes="+nStartPos+"-"; F~C9,`#Wf@ httpConnection.setRequestProperty("RANGE",sProperty); vT&xM Utility.log(sProperty); s/"l ?d CnvM>] ?)2&LVrf InputStream input = httpConnection.getInputStream(); 0>aAI3E //logResponseHead(httpConnection); m:sT) Kx@Papn|6 -$Ad#Eu]M byte[] b = new byte[1024]; 9pPohR*#V int nRead; GQR|t?:t while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) REaU=-m- { ^rP`
.Z nStartPos += fileAccessI.write(b,0,nRead); XoO#{7a //if(nThreadID == 1) Vw P+tM // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8rXQK|A } TSPFi0PP Ck;>9> S.Z2gFE&tu Utility.log("Thread " + nThreadID + " is over!"); /3>5ex>PN bDownOver = true; SD=kpf; //nPos = fileAccessI.write (b,0,nRead); 555*IT3b } 6(9S'~*'R catch(Exception e){e.printStackTrace ();} E/Ng } ~dpU DF } L]_1z !}[,ODJ4 d q!sazVaDp //打印回应的头信息 IeZgF> public void logResponseHead(HttpURLConnection con) TS~>9h\; { <691pkX for(int i=1;;i++) /@!%/Kl { I<["ko,t@? String header=con.getHeaderFieldKey(i); ,$xV&w8f\" if(header!=null) {imz1g; //responseHeaders.put(header,httpConnection.getHeaderField(header)); {okx*]PIc Utility.log(header+" : "+con.getHeaderField(header)); [
BpZ{Ql else Ns*&;x9 break; 2yt)"DnFk } R[l9f8 } x)h|!T=B~ 1_aUU,|. :MIJfr>z public void splitterStop() YaWZOuxm { Q=+*OQV29 bStop = true; LZ?z5U: } WLB@]JvTBY 7tEkQZMDI l4:5(1 } DF>LN%a~ \@3B%RW0 XlPi)3m4/S /* AD** 4E **FileAccess.java sFvu@Wm'7W *//文件访问(定位,写) zOEdFU{x package NetFox; 3/j^Ao\fw import java.io.*; PqhR^re0. N3Yf3rK rKtr&w7X public class FileAccessI implements Serializable{ D #`o Bc^%1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 gE_i#=bw RandomAccessFile oSavedFile; a___SYl
'K long nPos; 3t*e|Ih&j5 a
(mgz&* ^~iFG+g5 public FileAccessI() throws IOException sghQ!ux { re$xeq\1P? this("",0); 'UW(0 PXw } hI^Hqv T&ECGF;Y/ C`++r> public FileAccessI(String sName,long nPos) throws IOException N>+s8L.? { vz[-8 m:f oSavedFile = new RandomAccessFile(sName,"rw"); 0# )I:5 this.nPos = nPos; kzK4i!} oSavedFile.seek(nPos); vq.~8c1 } P_ [A T[z}^" 5Dhpcgq<< public synchronized int write(byte[] b,int nStart,int nLen) dv_& ei { )}G?^rDH( int n = -1; Gl4(-e'b try{ y,i ~w |4 oSavedFile.write(b,nStart,nLen); em@bxyMm n = nLen; ZSBa+3;z } FRSz3^A w catch(IOException e) Zgw;AY.R> { #)qn$&.H e.printStackTrace (); 'R{XqHP } L,m'/}$ 4)cQU.(*k 9(\eL9^ return n; A<1:vV } 7M|!N_ $ }k`-n32)| n%SR5+N" } )*b
dG'}
yR`X3.:*] 'V*ixK8R0 /* 6;O fh **SiteInfoBean.java J$]-)`[G& */ @scy v@5)F package NetFox; sULCYiT|Hn f>*D@TrU C\Y%FTS: public class SiteInfoBean { {.D^2mj| vxey$Ir jGeil
qPC private String sSiteURL; //Site's URL _F2R
x@Y private String sFilePath; //Saved File's Path x)wlp{rLf private String sFileName; //Saved File's Name k3pY3TA@w+ private int nSplitter; //Count of Splited Downloading File 1\[En/6 %![%wI? V!|:rwG2 public SiteInfoBean() NSsLuM=. {//nSplitter的缺省值为5 c}QWa"\2n //default value of nSplitter is 5 RS8tE( this("","","",5); ?!uj8&yyf } w_>SxSS7 *_qW;l7 &B3[:nS2 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) rt_k } { {\SJr: sSiteURL= sURL; d,hKy2 sFilePath = sPath;
)P>}uK; sFileName = sName; k3 YDnMRA9 this.nSplitter = nSpiltter; (= T%eJ61 (3_m[N\F #835$vOe } @`IMR$' }#b[@3/T 5>S<9A|Q public String getSSiteURL() mh4<.6>5 { ,4OH9-Q1 return sSiteURL; %6%QE'D } M9t`w-@_w vi4lmkyh^ J%:D%=9 ) public void setSSiteURL(String value) pZ IDGy=~ { Wv4x^nJ sSiteURL = value; &4dh $w]q } iB1+4wa jQV.U~25Q qgk-[zW# public String getSFilePath() =B/Ac0Y { M%vZcP return sFilePath; HRG2sv T4t } Z
ZMz0^V g]ct6-m Hy*_4r public void setSFilePath(String value) -J`VXG:M { /Cl=;^) sFilePath = value; FUD
M]:XQ } ZJod=^T #C`IfP./ O 8\wH public String getSFileName() Q&@~<!t { [8Yoz1(smA return sFileName; [%1 87dz:D } #cF ?a5 ,~TV/l< G|LJOq7QB public void setSFileName(String value) F.DRGi.i { i:@n6GW+iw sFileName = value; x3QQ`w- } aOOkC&% ($vaj; .Z2zv*
public int getNSplitter() jW!x!8= { =_@Q+N*]|( return nSplitter; i+Fk } pAY[XN S*D Bzl 1%^d<%,] public void setNSplitter(int nCount) g(b:^_Nep { "(QI7:iM nSplitter = nCount; 8euh]+ } t#eTn"; } X *fle (UGmbRf& )2YZ [~3 /* :8CYTEc **Utility.java {T=rsPp<@ */ AgU 7U/yk package NetFox; ~Bi{k'A9 H"n@=DMLm pRTdP/(OQ public class Utility { nWzGb2Y @9}SHS
)h&*b9[B= public Utility() WokQ
X" { }w%W A&"W *9?T?S|^$F M .J } z!0}Kj L(ni6- //线程睡眠 ;<~lzfs
public static void sleep(int nSecond) xdV $dDCT { SaA9)s try{ Z^?Y TykH Thread.sleep(nSecond); zm9_[0 } &qP@WFl catch(Exception e) w*-1*XNA { l*0`{R e.printStackTrace (); OM4q/!)A] } `tjH#W` } yS2[V,vS7 rQ!X //日志 VdfV5" public static void log(String sMsg) Hc"FW5R { 4[$D3,A System.err.println(sMsg); qt
!T%K } S}T*g UO x.:k0;%Q oP 0ZJK&; public static void log(int sMsg) ?xgrr7 { cYafQyU System.err.println(sMsg); )b_
GKA
` } ue~?xmZg } hG3p"_L n;5;D /cN. -lEo% /* iOO1\9{@ **TestMethod.java ,aLdW,<6 */ 'r2VWavT package NetFox; _H(:$=$Q G^ 2a<?Di \a|bx4M public class TestMethod { RlH~<|XK mI[$c"!BD ~1`ZPLVG public TestMethod() N+[ |"v { ///xx/weblogic60b2_win.exe n~wNee try{ 1Z+\>~8 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); "
~X;u8m //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \1p_6U7 SiteFileFetch fileFetch = new SiteFileFetch(bean); ; {P"~(S% fileFetch.start(); ~{O9dEI } 9u->.O: p catch(Exception e){e.printStackTrace ();} OGjeE4 B9-Nb 4 u,rieKYF } H:DTvv8e{ ezOZHY>|# 8O)!{gB public static void main(String[] args) 5>e3srKu { -'sn0_q/e new TestMethod(); GG}(*pOr } ^uy2qO4Yw } 9b0M'x'W5 点击下载更多相关资料
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