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/* t,R5FoV **SiteFileFetch.java 9ZG.%+l */ ,[+gE\z{{u package NetFox; vC\]7]mC import java.io.*; b#k$/A@ import java.net.*; tA@#SIw -CY?~WL& t ba%L public class SiteFileFetch extends Thread { X>F/0/ sBF}j.b ImklM7A SiteInfoBean siteInfoBean = null; //文件信息Bean yYWGM long[] nStartPos; //开始位置 Lc*i[J<s long[] nEndPos; //结束位置 ^']xkS FileSplitterFetch[] fileSplitterFetch; //子线程对象 rtf>\j+ long nFileLength; //文件长度 `EU=u_N boolean bFirst = true; //是否第一次取文件 WABq6q! boolean bStop = false; //停止标志 RhbYDsG File tmpFile; //文件下载的临时信息 |)pT"` DataOutputStream output; //输出到文件的输出流 H*yX
Iq: PWL Mux //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >F,~ QHcz public SiteFileFetch(SiteInfoBean bean) throws IOException v"_hWJ) { (sO;etW siteInfoBean = bean; YG?W8)T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5H==m~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4<Bj;1*4 if(tmpFile.exists ()) athU { qN+ ngk,: bFirst = false; 33[2$FBf read_nPos(); wvJm)Mj+ } O,9KhX+ else b V;R}3) { O>|Q Zd nStartPos = new long[bean.getNSplitter()]; Q?7UiTZ nEndPos = new long[bean.getNSplitter()]; n`0}g_\q } 3boINmX +Medu?K
` |nz,srr~ Gnj|y?' } D19uI&U4 lXW.G WZ@nuK.39T public void run() #\@*C= { E;D9S //获得文件长度 e][U ; //分割文件 : B$
d //实例FileSplitterFetch GJ
ZT~ //启动FileSplitterFetch线程 QF'N8Kla //等待子线程返回 [P)HVFy|l try{ (tx6U.Oy if(bFirst) 9dJARSUuF { hM/|k0YV nFileLength = getFileSize(); 8WZM}3x$f{ if(nFileLength == -1) 7DKbuUK { W84JB3p System.err.println("File Length is not known!"); y&-j NOKLM } EmVE<kY. else if(nFileLength == -2) "ln(EvW { )@\= pE.H System.err.println("File is not access!"); #G$_\bt } (6>8Dt 9[ else 5Ee%!Pk { sR+=<u1 for(int i=0;i<nStartPos.length;i++) :=T+sT~ {
. sgV nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4mQ:i7~ } 29 Yg>R!/ for(int i=0;i<nEndPos.length-1;i++) ^yu0Veypy { p_)V@7 nEndPos = nStartPos[i+1]; +VI2i~ } (.m0hN!~u nEndPos[nEndPos.length-1] = nFileLength; oh :g } xQ^zX7 } $3W[fC k^S=i_ U bh3}[O,L
A //启动子线程 u!
x9O8y fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +i4S^B/8i for(int i=0;i<nStartPos.length;i++) }O<=!^Y;A { %m t|Dl fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |94"bDL3~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $cSrT)u: nStartPos,nEndPos,i); #
0dN!l; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); loLQ@?E fileSplitterFetch.start(); op/HZa } 0}PW<lU- // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7^ITedW@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >|/NDF=\s // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 7Xw;TA nEndPos = " + nFileLength); # ~}
26 // fileSplitterFetch[nPos.length-1].start(); bezT\F/\ )d2 <;c k*w]a //等待子线程结束 Ky8sLm@ //int count = 0; imZi7o //是否结束while循环 3uZY.H+H boolean breakWhile = false; ^j0Mu.+_ ~kD/dXt (l TM5qC while(!bStop) 0 j:8Ve { wbyY?tH write_nPos(); nz3j";d Utility.sleep(500); p'0jdb :S breakWhile = true; =%%\b_\L mawomna 2+s_*zM- for(int i=0;i<nStartPos.length;i++) )~rfx { |ITp$_S if(!fileSplitterFetch.bDownOver) sbjAZzrX2i { "
2Dz5L1v breakWhile = false; <IC=x(T break; 26G2. /**< } SsIy ;l } 1y2D]h /' if(breakWhile) {Uz@`QO3 break; JN .\{ Y +?w 7Nm` *!$4 //count++; m$ )yd~ //if(count>4) hq6B
pE // siteStop(); jr|(K*; } r/$+'~apTk c*-8h{} pEuZsQ System.err.println("文件下载结束!"); D^baXp8 } J}c57$Z catch(Exception e){e.printStackTrace ();} wZJpSkcEx } ug'I:#@2 XZ EawJ0 #v0"hFOH, //获得文件长度 *p`0dvXG2 public long getFileSize() x1:+M]Da { (v6tE[4 int nFileLength = -1; w},' 1 try{ DJ_,1F URL url = new URL(siteInfoBean.getSSiteURL()); #=V%S
2~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I= G%r/3 httpConnection.setRequestProperty("User-Agent","NetFox"); u_;*Ay MUhC6s\F w,bILv) int responseCode=httpConnection.getResponseCode(); QM\vruTB if(responseCode>=400) D>+&= 5{ { iS&~oj_-% processErrorCode(responseCode); w<3}(1 return -2; //-2 represent access is error ZM K"3c9 } ^1s!OT Is )G\23P K{.s{;# String sHeader; 7F5t& e^&QT 'YIFHn$! for(int i=1;;i++) M$DJ$G|Z { {hG r`Rh //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !
E`Tt[ //Utility.log(in.readLine()); l=8)_z;~D sHeader=httpConnection.getHeaderFieldKey(i); 9uV/G7Geq if(sHeader!=null) \(Dq=UzQI { l+Dl~o} if(sHeader.equals("Content-Length")) #4%4iR5% { )IPnSh/< nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); QWH1xId break;
O<Qa1Ow7f } 7?-eR- } )z&0 g2Am else \HLI
y break; 9!b,!#= } !sQ$a#Ea } )SQ*"X4" catch(IOException e){e.printStackTrace ();} ?BT\)@h catch(Exception e){e.printStackTrace ();} +6|Ys O{ zY(`[ C7[ge& Utility.log(nFileLength); jCDZ$W89 MH[Zw$ C9E l {f return nFileLength; )A:2y + } %y)5:] et(/` -}`ES] //保存下载信息(文件指针位置) rUEoz |e4a private void write_nPos() ^"7tfo8 { TU&6\]yF_ try{ S8*VjG?T\ output = new DataOutputStream(new FileOutputStream(tmpFile)); ("0@_05OH output.writeInt(nStartPos.length); dya]^L}fL for(int i=0;i<nStartPos.length;i++) T=35? { }ddwL // output.writeLong(nPos); xoF]r$sC8 output.writeLong(fileSplitterFetch.nStartPos); -fw0bL%0 output.writeLong(fileSplitterFetch.nEndPos); h>-JXuN } 4 d4le output.close(); }M'h5x } q$z#+2u catch(IOException e){e.printStackTrace ();} #gq4%; catch(Exception e){e.printStackTrace ();} RBIf6oxdE } 2
*IF
=]&?(Gq LI_>fuv"8 //读取保存的下载信息(文件指针位置) ^'.=&@i- private void read_nPos() K-IXAdx { NsJt=~ try{ hYMIe]kJ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;<`F[V
Zau int nCount = input.readInt(); ?P@fV'Jo nStartPos = new long[nCount]; ztf
VXmi' nEndPos = new long[nCount]; |!{Q4< for(int i=0;i<nStartPos.length;i++) OLUQjvnU { G3n* bv nStartPos = input.readLong(); @iK=1\-2 nEndPos = input.readLong(); T0s7aw[zm } wNL!T6"G input.close(); z!;n\CV @ } 8*kZ.-T
B catch(IOException e){e.printStackTrace ();} }3:DJ(Y catch(Exception e){e.printStackTrace ();} fL.;- } q4{Pm $OW # eqt{ F,Y,0f@4U9 private void processErrorCode(int nErrorCode) `fh^[Q|4n0 { UMwB. * System.err.println("Error Code : " + nErrorCode); 0cZyO$. } 35z]pn%L D5fJuT-bp o6sL~*hQ //停止文件下载 E*ybf' public void siteStop() (Z5=GJM?$ { ~ ui/Qf2| bStop = true; \o ! for(int i=0;i<nStartPos.length;i++) Cnd70tbD ) fileSplitterFetch.splitterStop(); _H}y7 /Y5I0Ko Uw E0[!jZ:c } ;tTM3W-h } :J]S+tQ) //负责部分文件的抓取 w]]`/` **FileSplitterFetch.java ]\5@N7h */ ;~T)pG8IS package NetFox; 6}
"?eW ^tX+<X
pq_DYG] import java.io.*; ~K% ]9
import java.net.*; $l-|abLELz f gI.q P`6
T;|VDk public class FileSplitterFetch extends Thread { 75i
M_e\ i@e.Uzn /*p4(D_A String sURL; //File URL d,[.=Jqv[ long nStartPos; //File Snippet Start Position S+H#^WSt long nEndPos; //File Snippet End Position c\FyX\i int nThreadID; //Thread's ID 6G6Hg&B boolean bDownOver = false; //Downing is over nL!h hseH boolean bStop = false; //Stop identical RrKAgw FileAccessI fileAccessI = null; //File Access interface a
OR} I8HUH*|)n {:m5<6?x) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException dVc;Tt { q# gZ\V$I this.sURL = sURL; oc'#sE this.nStartPos = nStart; HRIf)n&~f this.nEndPos = nEnd; *V#v6r7<Y/ nThreadID = id; UXD?gK1 fileAccessI = new FileAccessI(sName,nStartPos);//定位 7Z5,(dH> } Ht+ng qY\zZ :|`'\%zW- public void run() g0I<Fan { g!~&PT)* while(nStartPos < nEndPos && !bStop) hY+3PNiI@ { B[ae<V0k ka{9{/dz3 X@Eq5s try{ hKtOh URL url = new URL(sURL); I9*o[Jp5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); dvxD{UH httpConnection.setRequestProperty("User-Agent","NetFox"); AbUU#C7 String sProperty = "bytes="+nStartPos+"-"; Le9r7O: httpConnection.setRequestProperty("RANGE",sProperty); 6CO>Tg:% Utility.log(sProperty); _/ j44q S<Q8kW: \<|a>{`7]i InputStream input = httpConnection.getInputStream(); d|TRP,y //logResponseHead(httpConnection); hor ok:{ ?I}jsm1) /'
L20aN2 byte[] b = new byte[1024]; X0b :Oiw int nRead; p9R`hgx while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) G+4a%?JH { g*t.g@B<2 nStartPos += fileAccessI.write(b,0,nRead); 7}Z.g9< //if(nThreadID == 1) [UNfft=K3P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); deaxb8'7 } mhJ>5z pW8pp? 9UOx~Ty Utility.log("Thread " + nThreadID + " is over!"); 1jo.d bDownOver = true; Oz^+;P1 //nPos = fileAccessI.write (b,0,nRead); w$A*|^w1 } TCU|k , catch(Exception e){e.printStackTrace ();} z%ljEI"<C } kr8NKZ/ } (~-q}_G;Q hw_7N)} ./kmI#gaV //打印回应的头信息 QC~B8 ] public void logResponseHead(HttpURLConnection con) q "bpI8j { aFo%B; 8m for(int i=1;;i++) v0X5`VV { ^]'p927 String header=con.getHeaderFieldKey(i); ,!kyrk6 if(header!=null) [rTV)JsTb //responseHeaders.put(header,httpConnection.getHeaderField(header)); i3: sV 5 Utility.log(header+" : "+con.getHeaderField(header)); r!Eo8C else ( NjX?^ break; _kH#{4`Hw } la)f\Nk } )[9L|o5D &IT'%*Y:V S7aS Ut! public void splitterStop() $f1L<euH { ] 5P{* bStop = true; oLruYSaD } ++,mM7a BOL_kp" b_V)]>v+ } "4g1I< 7azxqa5: MLBZmM ' /* 9-Ib+/R0 **FileAccess.java (Egykh> *//文件访问(定位,写) 9%zR?u package NetFox; "45BOw&72G import java.io.*; _rs#h) v{% /aw uT-WQ/id public class FileAccessI implements Serializable{ [&{"1Z r4D66tF //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;"Ot\:0 RandomAccessFile oSavedFile; zLxWyPM0; long nPos; L~mL9[( , ~MhPzu&B ._FgQ``PL public FileAccessI() throws IOException '
>\* { 'HqAm$V+ this("",0); *JpEBtTv=5 } (|6qN nIsi YF:NRY[i public FileAccessI(String sName,long nPos) throws IOException eM9~&{m. { jG.*tuf oSavedFile = new RandomAccessFile(sName,"rw");
RMi
2Ip this.nPos = nPos; LXXxwIBS oSavedFile.seek(nPos); a,j!B
hu } eQ9x l *Lh0E/5 "(C}Dn# public synchronized int write(byte[] b,int nStart,int nLen) e<C5}#wt { /FYa{.Vlr int n = -1; qp{NRNkQ try{ ;3?M?E/$s oSavedFile.write(b,nStart,nLen); RK'( {1 n = nLen;
6&u,. } 9CN /v catch(IOException e) 9J|YP}% { G2jEwi e.printStackTrace (); hCo&SRC/5 }
JI*ikco- F2:7UNy, u8W*_;%: return n; $ o t"Du } DI&xTe9k )Z;Y,g qC6Q5F } w}(xs)`num [p7le8= !t_,x= /* u>(Q& 25 **SiteInfoBean.java ,\qo */ Maxnk3n package NetFox; 92VAQU6 jkdNisq37 w"BTu-I public class SiteInfoBean { h)<42Y 8:A<PV!+ pDKJLa private String sSiteURL; //Site's URL W*s`1O > private String sFilePath; //Saved File's Path 4]+ ^K` private String sFileName; //Saved File's Name 6F(yH4 private int nSplitter; //Count of Splited Downloading File {jc~s~<# We4 FR4` vc!S{4bN public SiteInfoBean() YT3QwN9 {//nSplitter的缺省值为5 O%)9tFT //default value of nSplitter is 5 IB?A]oN1{ this("","","",5); Xt7'clr } '&9a% B{K'"uC PIr Uls0} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Q72wg~% w { f,-|"_5; sSiteURL= sURL;
pIrAGA; sFilePath = sPath; CVUJ(D&Q sFileName = sName; 1uH\Bn]p? this.nSplitter = nSpiltter; I|ULf G|MDo|q] +
zrwz\ } $yc,D=*Isi 'qP^MdoE%~ HOD2/ public String getSSiteURL() tFSdi.|G= { k}O|4*.BT return sSiteURL; 9D|
FqU | } ef.lM]cO )N6R# p/5!a~1'xN public void setSSiteURL(String value) q-o>yjT~ { \=_8G:1 sSiteURL = value; 0Fw\iy1o } ps[6)d)o EiN.VU ` 'wZy: c public String getSFilePath() -'N#@Wdr { Nb8<8O
^ return sFilePath; %1<p1u'r?# } lcP@5ZW ,C&>mv xA N1Z8I: public void setSFilePath(String value) |{jAMC0# { I[`2MKh sFilePath = value; !Q3Snu= } %zD-gw> UxvsSHi b(yO public String getSFileName() KALg6DZe: { Gu}x+hG return sFileName; 5HIpoj;\( } b
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75 _9@?Th&_e public void setSFileName(String value) bSR<d { '; dW'Uwc sFileName = value; E5t+;vL~ } 1;xw)65 =5/;h+bk+3 PHK#b.B>a8 public int getNSplitter() 0;H6b= { h.9Lh ;j return nSplitter; oe*&w9Y}& } yki
k4MeB ^sOm7S { ,%'0e/ public void setNSplitter(int nCount) /T(\}Z { G}-.xj] nSplitter = nCount; 4d 3Znpf } &v-V_.0(H } /C:'qhY, xI4I1"/ u/[]g+ /* \l:g{GnoT **Utility.java |Hm'.- */ ?iLd5 Z package NetFox; ,?`1ve_K< IeB6r+4| NslA/"* public class Utility { U>+~.|'V9 N39nJqo>" QP[a^5;Tt public Utility() u,akEvH~a { #VV.[N Doh|G:P]# e8 7-
B1` } 05KoxFO? T"H)g //线程睡眠 ]`sIs= _[ public static void sleep(int nSecond) W|#ev*'F { |{PJT#W% try{ `zp2;]W Thread.sleep(nSecond); '^l^gW/|\ } 0#[f2X62B catch(Exception e) Kyp0SZp[ { w;EXjl;X O e.printStackTrace (); V"H7zx } NoO+xLHw8 } S8OVG4- ]kkBgjQbS //日志 ,imvA5 public static void log(String sMsg) "-n%874IT { =_=Z;#`cXk System.err.println(sMsg); ARdGh_yJ& } eAsX?iaH p RwGv vif8{S public static void log(int sMsg) KKjxg7{K { +%Yc4 System.err.println(sMsg); I26gGp } %Sn 6*\z } :pDY ~BvY8\@B Yb\\
w<@g /* iEpq*Qj **TestMethod.java ;:4P'FWm^ */ 'K3s4x($ package NetFox; vzcBo% {?/8jCVd `GQiB]Z public class TestMethod { ,![Du::1 ZJ9Jf2 c ,B %fjcn public TestMethod() t\pK`DM-[ { ///xx/weblogic60b2_win.exe !p,hy` try{ G|-\T(&J SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); `_1(Q9Q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); e[QxFg0E SiteFileFetch fileFetch = new SiteFileFetch(bean); )4~sQ^} fileFetch.start(); $}nh[@ } '^Utbp2< catch(Exception e){e.printStackTrace ();} R6Zj=l[ 8b(1ut{ V(2,\+ t } +^*5${g;@H F@$RV_M
_@!QY
public static void main(String[] args) ^.#X<8hr {
3kiE3*H new TestMethod(); 9Yl8ndP^E } /S]:dDY9K } [vWkAJ'K 点击下载更多相关资料
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