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/* Y?&DEKFbD **SiteFileFetch.java M3jv aI */ qmue!Fv#g package NetFox; ]@ Sc} import java.io.*; "&~?Hzm import java.net.*; 5Sm 5jRr T je o*n^ |;U}'|6 public class SiteFileFetch extends Thread { #^4>U&? MW",r;l<aM #2lvfR| SiteInfoBean siteInfoBean = null; //文件信息Bean fbzKO^Ub long[] nStartPos; //开始位置 UpszCY4 long[] nEndPos; //结束位置 /BjGAa( FileSplitterFetch[] fileSplitterFetch; //子线程对象 w.T=Lzp long nFileLength; //文件长度 .j:.WnW boolean bFirst = true; //是否第一次取文件 ^M"=A}h boolean bStop = false; //停止标志 Rvu3Qo+ File tmpFile; //文件下载的临时信息 ~J. Fl[ DataOutputStream output; //输出到文件的输出流 VkN[=0a, Tk v //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) }{kTh%^ public SiteFileFetch(SiteInfoBean bean) throws IOException aG8D%i0 { q563,s siteInfoBean = bean; ?2;n=&ZM //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); g~^{-6Vg tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ot>EnHfV if(tmpFile.exists ()) \yX !P1 { zI2KIXcc bFirst = false; e>vUkP y read_nPos(); Hh/
-^G } YPff)0Nh else CtC`:!Q { ?`l=!>C4s nStartPos = new long[bean.getNSplitter()]; 4MtqQq4% nEndPos = new long[bean.getNSplitter()]; c~L6fvS } )QSt7g|OF (/x@W` i9EMi_% xv#j 593 } <zDw&s2 NW4
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public void run() WKrZTPD'm { X%9xuc //获得文件长度 Mly z>< //分割文件 J?Ep Nie //实例FileSplitterFetch MVeQ5c( //启动FileSplitterFetch线程 J6["j //等待子线程返回 jC Kt;lj try{ M9 2~iM if(bFirst) J!
6z {
|b-Zy~6 nFileLength = getFileSize(); ad$Qs3)6o if(nFileLength == -1) P15* VPy { %oCjZ"ke System.err.println("File Length is not known!"); J_wz'eIb0 } oCdOC5 else if(nFileLength == -2) _!^FW% { DCt:EhC System.err.println("File is not access!"); > ^v8N } u$%#5_k else hPeKQwzC0 { N;ecT@Ug for(int i=0;i<nStartPos.length;i++) <<2b2?aS` { {!g.255+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); V\M!]Nnxr } >ya- for(int i=0;i<nEndPos.length-1;i++) vs0H^L { ma-Y' nEndPos = nStartPos[i+1]; pTX'5 } ='bmjXu nEndPos[nEndPos.length-1] = nFileLength; k+R?JWC: } yxP ?O@( } \lbiz4^> \IZ4( Z (z1%lZ}( //启动子线程 ~Ro:mH:w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; UH^wyKbM for(int i=0;i<nStartPos.length;i++) 2#:]%y;\ { 13&>w{S} fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K<L%@[gi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^$Io;*N4 nStartPos,nEndPos,i); e$^!~+J7 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y0&HXX#\
fileSplitterFetch.start(); ]xLb )Z } >scS wT // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F+$@3[Q`N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @[b:([ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ty< tv|p nEndPos = " + nFileLength); .sR&9FH // fileSplitterFetch[nPos.length-1].start(); z3jzpmz S,tVOxs^ 8m[L]6F(-z //等待子线程结束 s=~7m.m //int count = 0; yoY)6cn@ //是否结束while循环 *,[=}v1 boolean breakWhile = false; u4+uGYr*@ KW6" +,Th 4"X>_Nt6 while(!bStop) E|4XQ|B@ { 2V"gqJHv write_nPos(); n`KXJ?t Utility.sleep(500); |AfQ_iT6c breakWhile = true; \\G6c4fC g~H?l3v ~m|?! ]n for(int i=0;i<nStartPos.length;i++) ^$,kTU'= { SyVbCj if(!fileSplitterFetch.bDownOver) &?`&X=Q { i |^`gly breakWhile = false; :lQjy@J break; +\Mm
(Nd } UO!6&k>c } n03SXaU~V if(breakWhile) g5 |\G%dOt break; #DRtMrfat 2P=~3g* bfI -!, //count++; u
R%R]X //if(count>4) J o(}#_y? // siteStop(); l(#Y8 } %y\7 kGq f@
I+ ,L:)ZZgN System.err.println("文件下载结束!"); [k=9 +0p } }Z?[Ut catch(Exception e){e.printStackTrace ();} Tc(v\|F, } r=||sZs BBJ]>lQ :::f,aCAu //获得文件长度 +\oHQ=s>}\ public long getFileSize() molowPI { uv!qE1z@': int nFileLength = -1; ~S>ba'] try{ .*f4e3 URL url = new URL(siteInfoBean.getSSiteURL()); #R PB;#{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L0VR( httpConnection.setRequestProperty("User-Agent","NetFox"); HPdwx
V 'htA! KHF '^(v8lCu int responseCode=httpConnection.getResponseCode(); =pOY+S| if(responseCode>=400) *K.7Zf0 { [f(^vlK processErrorCode(responseCode); ~wg^>!E return -2; //-2 represent access is error Q4:r$
& } 0a%ui2k 9S1V!Jp 64>[pZF8 String sHeader; w&cyGd D5 uBkny; xa0%;nFKe for(int i=1;;i++) TXl9c6 { c] R![sa //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3&Rqz9 W //Utility.log(in.readLine()); RX\O'Zwl j sHeader=httpConnection.getHeaderFieldKey(i); @N{Ht)1r if(sHeader!=null) |+~2sbM { q;PzB4# if(sHeader.equals("Content-Length")) 3D
dG$@ { (3r,PS@Qq@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); G ]By_ break; >t}D5ah } 4:PP[2? } 3'e 4{ else &.4_4"l( break; km^+
mK } ,VsCRp } j5GZ;d? catch(IOException e){e.printStackTrace ();} M%^laf catch(Exception e){e.printStackTrace ();} 6lAo`S\)eX )9Ojvp=#r: ^!Jm/- Utility.log(nFileLength); <Pt\)"JA s9bP6N!, )II,HT-LY return nFileLength; *)D*iU& } kP@OIhRe OSIp R0d|j#vP //保存下载信息(文件指针位置) S
IK{GWX private void write_nPos() M=`Se&-M { O;?~#E<6w try{ Bcon4 output = new DataOutputStream(new FileOutputStream(tmpFile)); I>Yp=R output.writeInt(nStartPos.length); 6l7a9IJ for(int i=0;i<nStartPos.length;i++) bLF0MVLM { v[3sg2. // output.writeLong(nPos); d`7] reh output.writeLong(fileSplitterFetch.nStartPos); 8E%*o output.writeLong(fileSplitterFetch.nEndPos); x,_Ucc. } |YFlJ2w output.close(); uhLmyK } +0 |0X {v catch(IOException e){e.printStackTrace ();} }TL"v|ny6; catch(Exception e){e.printStackTrace ();} Tou~U[V+ } hI{Yg$H1 Lpf=VyqC ?EAqv] //读取保存的下载信息(文件指针位置) (Z +C private void read_nPos() /U]5#'i { dD<kNa}2 try{ W^Y(FUy~ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W%cPX0 int nCount = input.readInt(); !{lb# nStartPos = new long[nCount]; d6&tz!f nEndPos = new long[nCount]; 9Wrclai for(int i=0;i<nStartPos.length;i++) 0pOha(,~ { `VN<6o( nStartPos = input.readLong(); nCB3d[/B nEndPos = input.readLong(); *?fBmq[j } 1<|I[EI input.close(); P[i/o# } P@?CQvMx catch(IOException e){e.printStackTrace ();} ':$a6f &T catch(Exception e){e.printStackTrace ();} eqCB2u"Jq } R"([Y#>m }2oJ _0E,@[ private void processErrorCode(int nErrorCode) xII!2. { ]XyJ7esg System.err.println("Error Code : " + nErrorCode); i`L66uV } {rLOAewr Su #1yw> +-d>Sl ( //停止文件下载 RBwV+X[B public void siteStop() ^yTN(\9 { >.4Sx~VH2 bStop = true; Q.\ovk~,a for(int i=0;i<nStartPos.length;i++) xRN$cZC fileSplitterFetch.splitterStop(); I5?LD=tt 9~I WGj? ]:fHvx_?`7 } JN)t'm[kyE } W:J00rsv=` //负责部分文件的抓取 MJ08@xGa **FileSplitterFetch.java xpwzz O*U */ cTp+M L package NetFox; bxq`E!] cgOoQP/# K?
k`U, import java.io.*; FG\?_G import java.net.*; %xz02$k sNVD"M, h+@t8Q;gGw public class FileSplitterFetch extends Thread { \gpKQt0 !
+ 7ve[z HfPeR8I%i String sURL; //File URL "RA$Twhj long nStartPos; //File Snippet Start Position OQvJdjST long nEndPos; //File Snippet End Position n0q(EQy1U int nThreadID; //Thread's ID
P_g boolean bDownOver = false; //Downing is over |0-L08DW boolean bStop = false; //Stop identical $49tV?q5 FileAccessI fileAccessI = null; //File Access interface } _z~:{Y 6:pN?|=6X nE84W$\ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9qA_5x%"%u { }=FQKqtC this.sURL = sURL; fHi+PEbR this.nStartPos = nStart; PV2904 this.nEndPos = nEnd; *TkABUL nThreadID = id; NQ!F` fileAccessI = new FileAccessI(sName,nStartPos);//定位 u 36;;z } S\m]z e D=Y HJ>-wB /([aD~. public void run() x;Q2/YZ# { uItKs u while(nStartPos < nEndPos && !bStop) w5Xdq_e3 { <T]kpP<lC )FLpWE"e- ;r']"JmF, try{ [>86i URL url = new URL(sURL); {w++)N2sh HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); RP9||PFS~~ httpConnection.setRequestProperty("User-Agent","NetFox"); |IvX7%*]~ String sProperty = "bytes="+nStartPos+"-"; F/Xhm91^ httpConnection.setRequestProperty("RANGE",sProperty); &Is%I<'o Utility.log(sProperty); vI@8DWs )LG/n {ex]_V> InputStream input = httpConnection.getInputStream(); p
pq#5t^[) //logResponseHead(httpConnection); 6BnjT xT/&'$@{) W +E2({ byte[] b = new byte[1024]; .B*)A. int nRead; zl5S)/A while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 3^Y-P8.zdB { ^8iy( nStartPos += fileAccessI.write(b,0,nRead); ITV}f# //if(nThreadID == 1) hGeRM4zVZZ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); vY6|V$ } xjpW<-)MLf 53QP~[F8R] 'Vd>"ti Utility.log("Thread " + nThreadID + " is over!"); ?)&TewP bDownOver = true; vKeK] //nPos = fileAccessI.write (b,0,nRead); 7^F?key? } /<@tbZJ*8 catch(Exception e){e.printStackTrace ();} !IS,[ } c
LJCLKJ } ?m6E@.{ ]2jnY&a5 G r)+O //打印回应的头信息 ]rS+v^@QH public void logResponseHead(HttpURLConnection con) C1J'. ! { sAb|]Q(( for(int i=1;;i++) H;6V { o>YRKb String header=con.getHeaderFieldKey(i); 2-4%h! if(header!=null) qA30G~S //responseHeaders.put(header,httpConnection.getHeaderField(header)); O_ cK4 Utility.log(header+" : "+con.getHeaderField(header)); 0U<9=[~q7@ else uD"Voh|]= break; =ZQIpc } IYWD_}_
$ } A{QS+fa/ [o~w>,a H4N==o public void splitterStop() &Ru6Yt0W { Dz?F,g_ bStop = true; _?ym,@}# } TsQMwV_h MAXdgL[] Z8 x(_ft5 } C9h8d }7V/(K z)26Ahm TV /* o|+tRl **FileAccess.java F~B8XUa3 *//文件访问(定位,写) xiI!_0' package NetFox; (.c?)_G, import java.io.*; yVL~SH| [;(|^0 &^EkM public class FileAccessI implements Serializable{ X7G6y|4;w {XVSHUtw //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 eg3{sDv, RandomAccessFile oSavedFile; (w.B_9# long nPos; Pw")|85 g%Z;rDfi <ANKoPNie public FileAccessI() throws IOException #&2mu { DeUDZL%/ this("",0); ((y+FJH }
>4Lb+] V{n pK( ?$
3=m)s public FileAccessI(String sName,long nPos) throws IOException b7$?'neH/. { CB~&!MdMr oSavedFile = new RandomAccessFile(sName,"rw"); &(K*TB|Om this.nPos = nPos; f /jN $p oSavedFile.seek(nPos); Gqs8$[o } SbB5J> >7J cIgF]My*D@ 1G\ugLm public synchronized int write(byte[] b,int nStart,int nLen) yY1&hop { =Rui int n = -1; ''Hq-Ng try{ (i`DUF'#y oSavedFile.write(b,nStart,nLen); Eb.{M n = nLen; MG~^> } +h
=lAHn& catch(IOException e) {DpZg",H- { i_MDLS>- e.printStackTrace (); p\(%bO } QKVZ![Y!s }, ]W/ AIE)q]'Q return n; QoqdPk#1 } htaB!Q?V 0q/g:"|j ,xGlWH wrY } P6X 4m(t .G^.kg , Cc=`:ED+ /* 9 Hm!B )Y **SiteInfoBean.java Jzr(A^vwo */ U $+rlw} package NetFox; l_8t[ s?=J#WV1y _h5@3>b3r public class SiteInfoBean { 5!AzEB i$ Zhk1 /_ LUys/0 private String sSiteURL; //Site's URL ~2pctqMA private String sFilePath; //Saved File's Path >iq^Ts private String sFileName; //Saved File's Name RY*6TYX! private int nSplitter; //Count of Splited Downloading File I3SLR u~G,=n ZJ!/49c*> public SiteInfoBean() ^UJO( {//nSplitter的缺省值为5 r:u5+A //default value of nSplitter is 5 JK_sl>v.7 this("","","",5); zRB1V99k } bJ9>,,D GwpJxiFgk
0.?|%;^ib public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) FO*Py)/rX { D[U5SS!) sSiteURL= sURL; /P,J);Y sFilePath = sPath; ed&, sFileName = sName; MJK L4 G this.nSplitter = nSpiltter; dL v\H& ecr pv+ #MI}KmH } [/#;u*n z7J#1q~:yY ]92@&J0w public String getSSiteURL() sR #( \ { 1(C%/g#" return sSiteURL; 8TuOf(qE } Z,ag5 w`]L C,K P!B{ Zr`:A$ public void setSSiteURL(String value) N2C^'dFj { +`\C_i- sSiteURL = value; 8on2BC2 } p7|~x@q+ :U?Kwv8 s Q~uj:A]n< public String getSFilePath() G:f]z;Xdp { o-/Xa[yC return sFilePath; [t,7H } W|~Ehg U{HJNftdpm sHKT]^7 public void setSFilePath(String value) ca-|G'q { 1J^{h5?lU sFilePath = value; -p9|l%W } g,9o'fs`x J8(v65 U2!9Tl9". public String getSFileName() {ImZ><xe/ { wz;IKdk[ return sFileName; Dk8"
H>* } .|cQ0:B[ 7+@:wX\ ^cd+W? public void setSFileName(String value) 4K:p { d&t|Y:,8 sFileName = value; AOhsat;O` } p.&FK'&[0 8L.Y0_x ]M>mwnt+ public int getNSplitter() N3i}>Q)B { 1[/X$DyaK return nSplitter; r=<,`_@Y } p)d'yj S_aml 03[(dRK>= public void setNSplitter(int nCount) P)ZGNtO9fG { K5'@$Km nSplitter = nCount; W~FcU+a } .\qZkk}2l } <[kdF") rs'~' Y IC37f[Q /* DTPYCG&% **Utility.java L<*wzl2Go */ or>5a9pj package NetFox; *tO7A$LDT nO2-fW:9] V6Z2!Ht public class Utility { -@e9!/GP, r@^h, 5q}680s9+ public Utility() u:NSPAD) { UVA|(: x-mRPH u-yQP@^H } %jim] ]<S[ Fz~-m# Ts //线程睡眠 R"VmN2 public static void sleep(int nSecond) H5{d;L1[ { SX$v&L< try{ ZWxq<&Cg Thread.sleep(nSecond); rhsSV3iM } Z@=#ry catch(Exception e) CFkM}`v0 { *dL!)+:d e.printStackTrace (); E_MGejm@ } G(EiDo& } SZea[~& 1|Us"GQ(n //日志 &AG,]# public static void log(String sMsg) ?`3`azfM { #B_
``XV System.err.println(sMsg); 0Ou`&u } ?n8gB7(FA ;gu_/[P U8PSJ0ny public static void log(int sMsg) EQET:a:g { JFIUD{>fp System.err.println(sMsg); YcBY[i0 } kTL{?- } S9U,so? ]4ya$%A .'saUcVg: /* pZ}4'GnZI **TestMethod.java eR4%4gW) */ }PTYNidlR package NetFox; RHZ5f0b4L ML^c-xY( TXWi5f[ public class TestMethod { a2 e-Q({ N=YRYUo b)tvXiO1> public TestMethod() 3i/$YX5@ { ///xx/weblogic60b2_win.exe <b~KR8 try{ %qfql SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); R_e{H^pY^ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); PMe bn$( SiteFileFetch fileFetch = new SiteFileFetch(bean); ^F"Q~?D) fileFetch.start(); Fc%@ } ggR@& \ catch(Exception e){e.printStackTrace ();} :n4? C0eP/d _@3@_GE } nlQ<Aa-% C0|<+3uND= '5\7>2fI public static void main(String[] args) /p+ (_Y { 7@NAky( new TestMethod(); 7aUk?Hf } {+_pyL } "T|%F D&[ 点击下载更多相关资料
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