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/* liw 9:@+V **SiteFileFetch.java g~hk-nXL. */ :.[5(' package NetFox; |vDoqlW import java.io.*; ws2j:B import java.net.*; ENXW#{N.v 6a]f&={E oB06{/6 public class SiteFileFetch extends Thread { mz$Wo *FB a^\- }4yR PtQ# SiteInfoBean siteInfoBean = null; //文件信息Bean renmz,dJ, long[] nStartPos; //开始位置 Be>c)90bO_ long[] nEndPos; //结束位置 O<Sc.@~ FileSplitterFetch[] fileSplitterFetch; //子线程对象 _HHJw""j long nFileLength; //文件长度 '"]>`=R boolean bFirst = true; //是否第一次取文件 0?Tk* X boolean bStop = false; //停止标志 o%^k T& File tmpFile; //文件下载的临时信息 }Q r0T DataOutputStream output; //输出到文件的输出流 2}`V c{\ g1 Wtu*K3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) zNr_W[ public SiteFileFetch(SiteInfoBean bean) throws IOException <aSLm= { _h=<_Z siteInfoBean = bean; AV[P QI //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); JIbzh?$aD tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); XJlDiBs9=Q if(tmpFile.exists ()) YNgR1:l { 9 CK\tx& bFirst = false; E0)mI)RW. read_nPos(); ),p]n } f-v ND'@ else *fvI.cKiGP { 3w^J"O/T nStartPos = new long[bean.getNSplitter()]; ^,Y~M_= nEndPos = new long[bean.getNSplitter()]; ^W[B[Y<k } ghobu}wuF oY2?W kL PO+lg+ 8~s-t } =O3I[ MY?O/,6 i5E:FS^!I public void run() iVpA@p { |+;K hC //获得文件长度 'tV"^KQHI //分割文件 dJQ }{,+6 //实例FileSplitterFetch mWN1Q<vn,l //启动FileSplitterFetch线程 *@G(3 n //等待子线程返回 0'%+X| try{ cfC; eRgq~ if(bFirst) g3|Y$/J7P { ^E<~zO=Z nFileLength = getFileSize(); )0n29 if(nFileLength == -1) #}t1 { (J^Lqh_ System.err.println("File Length is not known!"); <^*+8{* } +6#%P else if(nFileLength == -2) Mdlt zy=)L { w*6!?=jP System.err.println("File is not access!"); ,p*ntj{ } 59Tg"3xB< else *3F /Ft5 { [!:-m61 for(int i=0;i<nStartPos.length;i++) jsqUMy- { :rTKqX&"j nStartPos = (long)(i*(nFileLength/nStartPos.length)); `Dz]z_
} mHI4wS>()+ for(int i=0;i<nEndPos.length-1;i++)
D?\" { k67i`f= nEndPos = nStartPos[i+1]; XMeL^|D } /]k ,,& nEndPos[nEndPos.length-1] = nFileLength; *2"bG1` } &3 XFgHo } ^T}}4I_Y 8tT&BmT GLaZN4` //启动子线程 c>u>Pi;Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; eHR&N.2 for(int i=0;i<nStartPos.length;i++) <i:*p1#Bm { hyk|+z`B fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H)j[eZP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _>jrlIfc nStartPos,nEndPos,i); ;9p#xW6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =q"w2b& fileSplitterFetch.start(); [$1: &!(! } {m_A1D/_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), RWh9&O:6' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J3lG"Ww // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", iL7-4Lv# nEndPos = " + nFileLength); 9&O#+FU // fileSplitterFetch[nPos.length-1].start(); e8XM=$@ y(/jTS/hd Xc8= 2n //等待子线程结束 kwDh|K //int count = 0; ^Hz //是否结束while循环 h\D_ boolean breakWhile = false; &prdlh=UE ]HJ{dcF cotxo?)Zv while(!bStop) o;M.Rt\A { XI@6a9Uk write_nPos(); `x%U Utility.sleep(500); 5T$9'5V7 breakWhile = true; 0\\ueMj {2}tPT[a( zqHpT^B? for(int i=0;i<nStartPos.length;i++) pIID=8RJ. { Wz6]*P`qv if(!fileSplitterFetch.bDownOver) ~8H&m,{j { m0xJ05Zx breakWhile = false; >G-8FL break; mHK@(D7X } #/n|@z' } cS"f if(breakWhile) G8^0^@o break; ":UWowJO 2X qTyf< pY{; Yn&t //count++; iwG>]:K3 //if(count>4) 3iu!6lC // siteStop(); L\/u}]dPQ } SWNU1x{,c\ 3o+KP[A L?=#*4t System.err.println("文件下载结束!"); {f`lSu } _L&n&y1+% catch(Exception e){e.printStackTrace ();} IZ4W_NN } ONjC(7 rmY,v XysFwi //获得文件长度 bDciZ7[b public long getFileSize() m!HC -[< { ;,v!7 int nFileLength = -1; s"I-YFP%c try{ R4#;<) URL url = new URL(siteInfoBean.getSSiteURL()); CTh1+&Pa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]^iFqQe httpConnection.setRequestProperty("User-Agent","NetFox"); |_l<JQvf`E 0OleO9Ua A5CdLwk int responseCode=httpConnection.getResponseCode(); jGO9n if(responseCode>=400) .+{nA}Bc { tj#=%m?8V; processErrorCode(responseCode); K(-G: | return -2; //-2 represent access is error Zvd ;KGO(a } r+imn&FK8 g8%MOhg 4mEzcwo' String sHeader; >X;xIyRL =]=B}L` fp.!VOy for(int i=1;;i++) +IwdMJ8&8 { Xtuhc dzu[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Hnfvo*6d.e //Utility.log(in.readLine()); T6sr/<#<( sHeader=httpConnection.getHeaderFieldKey(i); kVV\*"9y if(sHeader!=null) fC=fJZU7$ { <T(s\N5B= if(sHeader.equals("Content-Length")) =}~NRmmF { I["F+kt^^ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); e(?:g@]-r break; 6?53q e } GLo\q:5A } 0L!er%GM else 4fu'QZ(} break; 5Waw?1GL } z[WC7hvU } fm3(70F\ catch(IOException e){e.printStackTrace ();} 8# 6\+R catch(Exception e){e.printStackTrace ();} ^36M0h|R VYL@RL' 6P0y-%[Gk Utility.log(nFileLength); cDfx)sL 2~vo+ng <\>+~p, return nFileLength; @)9REA(U } Jb(DJ-& f&6w;T= 6{5q@9F //保存下载信息(文件指针位置) PPUEkvH
W private void write_nPos() q $t&|{ { mG0L !5 try{ aML#Z |n output = new DataOutputStream(new FileOutputStream(tmpFile)); '
be P output.writeInt(nStartPos.length); u8|@|t for(int i=0;i<nStartPos.length;i++) v2IEJ { 5iP8D<;o5 // output.writeLong(nPos); VMaS;)0f@ output.writeLong(fileSplitterFetch.nStartPos); 9Tqo LX output.writeLong(fileSplitterFetch.nEndPos); +#0~:&!9 } u@AI&[Z output.close(); pI
&o?n } Bk&-1>cY catch(IOException e){e.printStackTrace ();} Xwn3+tSIa catch(Exception e){e.printStackTrace ();} !A~d[</]m } F;pTXt}?5 yPSVwe|g 66/Z\H^d //读取保存的下载信息(文件指针位置) E^7C
_JP private void read_nPos() aPprMQ5 { "]v
uD try{ I%SuT7"Do DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I4rV5;f
H4 int nCount = input.readInt(); ojX%RU nStartPos = new long[nCount]; NPS.6qY nEndPos = new long[nCount]; ;?0_Q3IML for(int i=0;i<nStartPos.length;i++) _B}9f { :qBGe1Sv( nStartPos = input.readLong(); /j11,O?72 nEndPos = input.readLong(); I"B8_ } f(!E!\&n^ input.close(); &j3`
)N } GaHA% catch(IOException e){e.printStackTrace ();} K*[9j 0 catch(Exception e){e.printStackTrace ();} BlL|s=dlQV } w2k<)3 g~ -<xyC8$^$ :MK=h;5Z private void processErrorCode(int nErrorCode) B#1:Y;Z { " <qEXX System.err.println("Error Code : " + nErrorCode); b9`i Z } Jth=.9mrM hBjVe?{ ooY\t + //停止文件下载 =PV/`I_h public void siteStop() wcwQj Hwd
{ ~eHRlXL' bStop = true; \N? 7WQ for(int i=0;i<nStartPos.length;i++) JfbKf~g fileSplitterFetch.splitterStop(); 6eM6[ yji>*XG ?<!
nm&~ } =9^Q"t4 } p+RAtR f //负责部分文件的抓取 b"Zq0M0l **FileSplitterFetch.java s_xV-C#q@ */ #Gd7M3 package NetFox; B=r0?%DX"1 TiQ^}5~M GYd]5`ri import java.io.*; EA6t36|TX import java.net.*; !Qcir&]C> ]Dh1~k.Kp te)n{K", public class FileSplitterFetch extends Thread { 8`*`nQhWa \2j|=S6 wrabyRjK String sURL; //File URL ka#K
[qI long nStartPos; //File Snippet Start Position t}VwVf<K long nEndPos; //File Snippet End Position 6%E~p0)i% int nThreadID; //Thread's ID nx B32 boolean bDownOver = false; //Downing is over Q{[@`bZB boolean bStop = false; //Stop identical Lbsr_*4t FileAccessI fileAccessI = null; //File Access interface 9^au$KoU +>4^mE" \ []"=]f{1}; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException !9DX=? { ~\[?wN this.sURL = sURL; p'g^Wh this.nStartPos = nStart; %&tb9_T)d this.nEndPos = nEnd;
.1LPlZ nThreadID = id; 7-X/>v fileAccessI = new FileAccessI(sName,nStartPos);//定位 {\EOo-&A }
J,(7.+`~# MQJ%He" 3 "Yif public void run() 0yz~W(tsm { S7CV
w,2 while(nStartPos < nEndPos && !bStop) 'l|R5 { FN!1|'VK '#W_boN W^k,Pmopy try{ iV!@bC, URL url = new URL(sURL); 5}XvL' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1q]&7R httpConnection.setRequestProperty("User-Agent","NetFox"); 1[s0Lz String sProperty = "bytes="+nStartPos+"-"; g8l5.Mpx httpConnection.setRequestProperty("RANGE",sProperty); @o&Ytd;i Utility.log(sProperty); ?Wa<AFXQ [Tp%"f1 m6i%DE InputStream input = httpConnection.getInputStream(); J(e7{aRJ9 //logResponseHead(httpConnection); iDw.i"b &\^rQi/tf U-g9C. byte[] b = new byte[1024]; yUe+":7k. int nRead; =Dk7RKoHF while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @\jQoaLT$_ { _=EZ `!% nStartPos += fileAccessI.write(b,0,nRead); h>klTPM> //if(nThreadID == 1) I+",b4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AkA!:!l } "r. . OJpj}R 'E -FO_N Utility.log("Thread " + nThreadID + " is over!"); ^C7C$TZS bDownOver = true; G6Nb{m //nPos = fileAccessI.write (b,0,nRead); NAJVr}4f } 7Cy<mS catch(Exception e){e.printStackTrace ();} DsGI/c } %i"}x/CD[ } EnJ!mr =EpJZt 0hwj\{" //打印回应的头信息 PS@ *qTin public void logResponseHead(HttpURLConnection con) Ri @`a { J633uH}} for(int i=1;;i++) 7W|Zq6pi { :gf;} String header=con.getHeaderFieldKey(i); k. GA8=]> if(header!=null) XYAmJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); .S7:;%qL6 Utility.log(header+" : "+con.getHeaderField(header));
"SR5wr else [PWL<t::c break; <lj\#'G3 } R ]P;sk5 } >1ZJ{se 6 P*O&1hv sS9%3i/> public void splitterStop() TzKK;(GX { wkBL=a bStop = true; 3?`" } ?WHy0x20 #epy%> p`P~i&_ } x=*L- aWGon]2p EB,4PEe: /* 1'O0`Me># **FileAccess.java Im)EDTm$ *//文件访问(定位,写) Uc&iZFid2K package NetFox; ,S!w'0k|n import java.io.*; CW`!}yu% f Iy]/ ipjkZG@ public class FileAccessI implements Serializable{ 3Aj*\e0t o`6|ba //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 }l;Lxb2` RandomAccessFile oSavedFile; Yb:pAzw6 long nPos; :(p)1=I r}W2 Ak\ 8\Hr5FqB( public FileAccessI() throws IOException wC`
R>) { 1mH\k5xu this("",0); SlaDt } F,T~\gO5, 1*UNsEr LchnBtjn public FileAccessI(String sName,long nPos) throws IOException &tE.6^F { /k6fLn2; oSavedFile = new RandomAccessFile(sName,"rw"); 6+`tn this.nPos = nPos; Yc;ec9~ oSavedFile.seek(nPos); n7l%gA* } >]?H`>4( |W7rr1]~S _0(7GE13p public synchronized int write(byte[] b,int nStart,int nLen) b{5K2k&, { Tlodn7%", int n = -1; 9wh2f7k try{ YRcps0Dx9 oSavedFile.write(b,nStart,nLen); L*]0"E n = nLen; Xy7Z38G } jd:B \%#![ catch(IOException e) 1RqgMMJL { *b)Q5dw@1 e.printStackTrace (); 0LL c 1t>} } Zyye%Ly 9[Qd)%MO \#,t O%D return n; KnzsHli,~k } YQ]\uT>}& !;3PG9n3|h a07=tD } ll<NIdf\r M1!pQC_9 \Fb| {6+ /* Qe$k3! **SiteInfoBean.java %b}gDWs */ _*6v|Ed? package NetFox; k\7:{y@, )=^w3y `<fh+* public class SiteInfoBean { 9|WV~ ga0'zo9K Ph,-sR private String sSiteURL; //Site's URL cQUC.TZ_ private String sFilePath; //Saved File's Path i7Z=|& private String sFileName; //Saved File's Name ]axh*J3`i private int nSplitter; //Count of Splited Downloading File *xs!5|n+ %fjuG z#Nl@NO& public SiteInfoBean() Fn|gVR {//nSplitter的缺省值为5 ]v 29 Rx //default value of nSplitter is 5 uTvv(f this("","","",5); K_/B?h } SO?8%s(
m{%t?w$Au ;4#D,z lO^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) LE=k { [QczlwmO sSiteURL= sURL; *"{&FEV sFilePath = sPath; x?yD=Mq_ sFileName = sName; #kmh:P this.nSplitter = nSpiltter; _GoVx=t
KL?) akk Pz"`MB<'Ik } (pR.Abq \\4Eh2
Y A74920X`W public String getSSiteURL() ,|T7hTn= { BavO\{J#|0 return sSiteURL; Sp SnoVI } b=[?b+ 0$vj!-Mb^j E~hzh /,34 public void setSSiteURL(String value) slW3qRT\k { T-" I9kM sSiteURL = value; "ZMkL)'7- } ]MTbW=*}ED q/&y*)&'O 8im@4A+n` public String getSFilePath() &h~aChJ { MXvXVhCU return sFilePath; ;%!m<S|%k } [rYT YJF#)TkF `,>wC+} public void setSFilePath(String value) 2#5,MP~r { nCxAQ|P? sFilePath = value; "$^0%- } }
:?.># " Ar*QJ0] !K0JV|-?t public String getSFileName() <vc`^Q&4B { 3I=kr return sFileName; XhW %,/< } M8;lLcgu. $#NQ<3 F}
DUEDND* public void setSFileName(String value) eiMH['X5 { 6[dur'x sFileName = value; ,^s } )R)a@op 40P) 4w 4FMF|U public int getNSplitter() 6`H.%zM { xi'>m IT return nSplitter; z(HaRB3l } ~,gXaw 1yqoA* ;3ft1 public void setNSplitter(int nCount) /CX VLl8~ { {padD p nSplitter = nCount; `$5UHa2/ } \ FzM4- } 15H6:_+=0 :14i?4Fd L2z2}U=< /* ":;@Hnb/ **Utility.java i6PM<X,{; */ '/%zi,0 package NetFox; UVuDQ )mcEQ -!b fys public class Utility { K\.5h4k VM=+afY5M oR#:NtX@ public Utility() K`KLC.j { v90T{1+M|4 9}tG\0tL* m~l
F`? } ,TC;{ $O5 x8#ODuH //线程睡眠 SAv<& public static void sleep(int nSecond) `k{& /] { \c`oy=qY0 try{ Es5p}uh.[Y Thread.sleep(nSecond); ra7uU* } qv{o|g
QB catch(Exception e) zsl,,gk9Y { aw $L$7b} e.printStackTrace (); %:C ]7gQ } r64u31.) } !
T9]/H? Yx d X#3 //日志 -p,x&h,p public static void log(String sMsg) b'@we0V@S { v"DL'@$Ut{ System.err.println(sMsg); H: {7X1bV } {{yt*7k { hZ\+FOx; 8nNsrat public static void log(int sMsg) C'mL& { H}0dd" System.err.println(sMsg); u=+q$Q] } c9Es%@] } =([av7 =H5\$&xj4. alFjc.~} /* c@m5~
**TestMethod.java ub?K, */ hq>Csj==@ package NetFox; g=)J~1&p <g2_6C\j %g"eV4j public class TestMethod { ]rBM5~ VDEv>u4 }OShT+xeX public TestMethod() j8 ,n7!G { ///xx/weblogic60b2_win.exe `cB_.& try{ 748CD{KxW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); uZ6d35MJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); WgGm#I>K
SiteFileFetch fileFetch = new SiteFileFetch(bean); 7Hw<ojkt fileFetch.start(); }odV_WT } |01?w | catch(Exception e){e.printStackTrace ();} bMoAD.} d}I(`%%) KU&G;ni2 } _Tm0x>EM ?[)S7\rP |I8Mk.Z=FA public static void main(String[] args) /i|z.nNO { jk~:\8M(A new TestMethod(); !mfJpJ } dx_6X!=.J } Bo_ym36N 点击下载更多相关资料
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