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/* ?OBB)hj **SiteFileFetch.java bC,SE*F\ */ "Z#MR`;&29 package NetFox; }_fVv{D
import java.io.*; ,T8fo\a4 import java.net.*; )(h<vo)-zX c8oE,-~ +:3p*x%1H public class SiteFileFetch extends Thread { 6Tg'9|g 5 J
7XVe> !|-:"hE1h SiteInfoBean siteInfoBean = null; //文件信息Bean g+QNIM> long[] nStartPos; //开始位置 tN_~zP long[] nEndPos; //结束位置 kf1 ( FileSplitterFetch[] fileSplitterFetch; //子线程对象 &GaI long nFileLength; //文件长度 >K
7]G?+7E boolean bFirst = true; //是否第一次取文件 b4CXif boolean bStop = false; //停止标志 (Eo#oX File tmpFile; //文件下载的临时信息 R_duPaWc@ DataOutputStream output; //输出到文件的输出流 X=[`+= oR}'I //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) vFK!LeF% public SiteFileFetch(SiteInfoBean bean) throws IOException ]//Dd/L6 { oRHWb_$" siteInfoBean = bean; i)[~]D.EH8 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); D'
`[y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7!q.MOYm if(tmpFile.exists ()) J\Z\q { TL@{yJ;s bFirst = false; ,%]xT>kH read_nPos(); 5[A4K%EL } bkL5srH else `_E@cZ4 {
fYzZW nStartPos = new long[bean.getNSplitter()]; V]|P>>`v9p nEndPos = new long[bean.getNSplitter()]; ^fhkWx 4i } .]BJM?9 LLJsBHi- o%l|16DR ^w~Utx4 } k2DBm q; 4Dv42fO ILT.yxV public void run() a WMEo`O% { 9 [wR/8Xm //获得文件长度 A{ Ejk| //分割文件 NplkhgSj //实例FileSplitterFetch jHpFl4VPz //启动FileSplitterFetch线程 7_]Bu<{f //等待子线程返回 /@9-D
4 try{ pd oCV if(bFirst) sRSy++FRF { T0lbMp nFileLength = getFileSize(); Z$ 6yB if(nFileLength == -1) /Avl&Rd { E{E%nXR) System.err.println("File Length is not known!"); :\,3=suWq } X-J<gI(Y else if(nFileLength == -2) A!p70km2 { Y?V>%eBu System.err.println("File is not access!"); usOIbrQ } &&($LnyA] else `KJBQK { -{a&Zkz>V for(int i=0;i<nStartPos.length;i++) ['_G1_p { Hbi2amfBu nStartPos = (long)(i*(nFileLength/nStartPos.length)); 3&7$N#v } nnBl:p>< k for(int i=0;i<nEndPos.length-1;i++) qJLtqv { 5Y(f7,JX nEndPos = nStartPos[i+1]; qY%{c-aMA } 9 e0Oj3!B nEndPos[nEndPos.length-1] = nFileLength; ompkDl\E } IQQWp@w#8 } "P{T] ^n8r mh_% zIgD R //启动子线程 J(%kcueb
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |T^c(RpOE for(int i=0;i<nStartPos.length;i++) R{A$hnhW6 { %SD=3UK6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %2TjG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), XV*uu "F nStartPos,nEndPos,i); tS&rR0<OW Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d=8q/]_p fileSplitterFetch.start(); +)l6%QKcW } oN
" /w~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gTwxmp., siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {h *Pkn1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", m\?H
<o0 nEndPos = " + nFileLength); Jp]eFaqp // fileSplitterFetch[nPos.length-1].start(); l]v>PIh~N Rjz~n38. KsBi<wY //等待子线程结束 Z4@GcdZ //int count = 0; *WpDavovyB //是否结束while循环 E0a &1j boolean breakWhile = false; s6J`i&uu 8^%Nl `_2B isR|K9qf^ while(!bStop) '{xPdN { #iAEcC0k5 write_nPos(); q+Cq&|4
?2 Utility.sleep(500); o$_,2$>mn breakWhile = true; }0?\H)/edP L.) 0!1 +$H`/^a. for(int i=0;i<nStartPos.length;i++) QL_9a,R'r { O6$d@r;EK] if(!fileSplitterFetch.bDownOver) N M_Xy<.~E { m6oaO9"K breakWhile = false; l gzA) ( break; dy^ zOqc } BR [3i}Ud } +>wBGVvS if(breakWhile) FOx&'dH%@ break; O$,MdhyXC 2RC|u?+@ P\R#!+FgW8 //count++; KWH l+pL //if(count>4) q:/<^| // siteStop(); 26Jb{o9Z< } .y~vn[q N Z&E!m .#[== System.err.println("文件下载结束!"); bI"_hvcFp } kL1StF#p catch(Exception e){e.printStackTrace ();} v8!Ts" } Wy`ve~y :AM5EO rW(<[2 vg //获得文件长度 7r4|>F public long getFileSize() YXr" { nVt,= ?_ U int nFileLength = -1; cq,0?2R`t try{ c;dMXv URL url = new URL(siteInfoBean.getSSiteURL()); e=m=IVY#W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); BQfq]ti httpConnection.setRequestProperty("User-Agent","NetFox"); t/TWLhx/ A\v(!yg W dNOE;R int responseCode=httpConnection.getResponseCode(); ,_(AiQK if(responseCode>=400) w( ^
{ efu'PfZ`& processErrorCode(responseCode);
nW*D return -2; //-2 represent access is error 3/i_?G } nF!6 `oq][| b,Vg3BS String sHeader; 3</gK$f2 H${5pY_M gL:Vj%c for(int i=1;;i++) k ED1s's { ^Voi4; //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); B<" `<oG@| //Utility.log(in.readLine()); BrO" _ sHeader=httpConnection.getHeaderFieldKey(i); _^5OoE"}! if(sHeader!=null) gx',~ { p2/Pj)2 if(sHeader.equals("Content-Length")) y]e[fZ`L { R]! [h nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (6Tvu5*4U break; 6SGV}dAx } Oe/\@f0bLT } RMvq\J}w! else 2`;&Uwt break; Z=&cBv4Fs } f6r~Ycf,f } p&nPzZQL( catch(IOException e){e.printStackTrace ();} Oe["4C catch(Exception e){e.printStackTrace ();} Fb0r(vQ^ Jb (CH4|7 >{HQ"{Q Utility.log(nFileLength); PV\aQO.mo UTLuzm &x YO6_. return nFileLength; tvlrUp } (rfR:[JkC2 x[_SNX" O;dtz\ //保存下载信息(文件指针位置) <n-}z[09 private void write_nPos() !Enq2 { 3~o#1*-> try{ gZHuyp(B output = new DataOutputStream(new FileOutputStream(tmpFile)); 7a_tT;f; output.writeInt(nStartPos.length); j
LS<S_` for(int i=0;i<nStartPos.length;i++) QK`5KB(k' { nR(v~_y[V // output.writeLong(nPos); 5Y(<T~ output.writeLong(fileSplitterFetch.nStartPos); <(c_[o/ output.writeLong(fileSplitterFetch.nEndPos); 5mYX#//: } o<8('j
output.close(); e>] gCa } <1%(%KdN[ catch(IOException e){e.printStackTrace ();} Z.l4< catch(Exception e){e.printStackTrace ();} };Oyv7D+b } f)x(sk aJ/}ID E;tEmGf6F //读取保存的下载信息(文件指针位置) V*<`!w private void read_nPos() fFYfb4o { y<5RV>"Vg try{ $~+(si2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !ay:h
Iv int nCount = input.readInt(); [(rT,31cW nStartPos = new long[nCount]; `]7==c #Y nEndPos = new long[nCount]; 2Pm[
kD4E= for(int i=0;i<nStartPos.length;i++) Ht9QINo { *t%Z'IA nStartPos = input.readLong(); =f/CBYNw@V nEndPos = input.readLong(); 0;Oe&Y } xk*&zAt input.close(); S
T1V } |W#(+m catch(IOException e){e.printStackTrace ();} 6Lc{SR catch(Exception e){e.printStackTrace ();} [2$mo;E? } ?` lD|~ v6C$Y+5~ e=^^TX`I private void processErrorCode(int nErrorCode) 2Wn*J[5 { K'_qi8Z System.err.println("Error Code : " + nErrorCode); C==yl"w } v8} vk]b uo8[,' 7M/v[dwL //停止文件下载 ZQk!Ia7 public void siteStop() M
'#a.z% { @=sM')f& bStop = true; i$5<>\g for(int i=0;i<nStartPos.length;i++) OU
esL9 fileSplitterFetch.splitterStop(); &.l^> # hGy[L3{ DYDeb i6 } l@)`Q } \47djmG- //负责部分文件的抓取 lHUd<kEC **FileSplitterFetch.java Gl"|t't( */ xwF mY'o package NetFox; 3Cw}y55_y dfP4SJqq
@9tzk [ import java.io.*; lQM&q import java.net.*; :N^+!,i zub"Ap3 @PT([1C public class FileSplitterFetch extends Thread { B[,AR"#b 8<)ZpB,7 @V&c=8)8 String sURL; //File URL Rb!y(&>v long nStartPos; //File Snippet Start Position ~].?8C.>* long nEndPos; //File Snippet End Position @C|nc&E2s int nThreadID; //Thread's ID mCyn:+ boolean bDownOver = false; //Downing is over D3B] boolean bStop = false; //Stop identical J= [D'h FileAccessI fileAccessI = null; //File Access interface yAiO._U c'.XC} lvsj4cT public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bp!Jjct { O 9C&1A|lA this.sURL = sURL; ]h?q1
this.nStartPos = nStart; W cGg this.nEndPos = nEnd; 4{@{VsXN nThreadID = id; |A/H*J, fileAccessI = new FileAccessI(sName,nStartPos);//定位 eaC%&k } #;yxn.</ K9{RU4< oY4^CGk= public void run() )bWopc {
l*?_ @ while(nStartPos < nEndPos && !bStop) Z]e`bfNnI { lSg[7lt W,|+Dl FUarI5#fwF try{ kuI~lBWI URL url = new URL(sURL);
/&c2O X|Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); g#MLA5%=u httpConnection.setRequestProperty("User-Agent","NetFox"); o1vK2V String sProperty = "bytes="+nStartPos+"-"; 5Xf]j=_ httpConnection.setRequestProperty("RANGE",sProperty); _6SAU8M, Utility.log(sProperty); v\[+ o_1N "o% Gl@{y ( InputStream input = httpConnection.getInputStream(); UE{$hLI?g //logResponseHead(httpConnection); r'`7}@H* MkL) ZfH+Iqd byte[] b = new byte[1024]; t/}NX[q int nRead; ^v`naA( while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $AT@r" { o]Xt2E nStartPos += fileAccessI.write(b,0,nRead); zak|* _ //if(nThreadID == 1) =ecLzk"+F // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |r*)U(c` } -p>~z ) -@e2/6Oi xeL"FzF:V Utility.log("Thread " + nThreadID + " is over!"); S=0DQ19 bDownOver = true; b[GhI+_ //nPos = fileAccessI.write (b,0,nRead); /)T~(o|i } Cs_&BSs catch(Exception e){e.printStackTrace ();} >.6|\{*sG } *E*oWb]H } {zWR)o .= TF%Xb>jy[ c"v75lW-J //打印回应的头信息 mU]VFPr5 public void logResponseHead(HttpURLConnection con) [ /YuI@C,@ { .L+XV y for(int i=1;;i++) wk ^7/B { {fnx=BaG String header=con.getHeaderFieldKey(i); c:.~%AJx if(header!=null) ^nK<t?KS //responseHeaders.put(header,httpConnection.getHeaderField(header)); x9,jXd Utility.log(header+" : "+con.getHeaderField(header)); #1/~eIEY else F#>00b{Q break; gfs ;?vP } zGFD71=# } i84!x%|P MoE&)~0u& (c>g7d<>n public void splitterStop() W&=OtN
U! { UrHndnqM bStop = true; 1_<x%>zG } 59O-"Sc[ s(nT7x+W b,^Gj]7 } 0|RofL&o ?+))J~@t CVWT>M< /* +rJ6DZ **FileAccess.java ."H;bfcL_ *//文件访问(定位,写) ~L"$(^/ package NetFox; $'%GB $. import java.io.*; QXZyiJX} `XhH{*Q"X y-db CYMc public class FileAccessI implements Serializable{ {$,\Qg t|$jgM //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 (Kwqa"Hk4{ RandomAccessFile oSavedFile; ~g\~x long nPos; aknIrblS\ &yvvea] F)(^c public FileAccessI() throws IOException 0eNdKE { %W"u4
NT7 this("",0); <@<bX } ? Bpnnwx ts!tv6@ %(1OjfZc public FileAccessI(String sName,long nPos) throws IOException ~<?Zj { TIKkS*$ oSavedFile = new RandomAccessFile(sName,"rw"); I@MG?ZQ this.nPos = nPos; uhh7Ft#H oSavedFile.seek(nPos); *qwN9b/! } Qz,2PO c1"wS*u =3.dgtH public synchronized int write(byte[] b,int nStart,int nLen) wX0D^)NtF { UPI- j#yc int n = -1; "5&"Ij,/ try{ ^o{{kju oSavedFile.write(b,nStart,nLen); tL$,]I$1+ n = nLen; 0+e=s0s. } AP=h*1udk catch(IOException e) =P]Z"Ok { ^Hv&{r77 e.printStackTrace (); px<psR5 } Lw}-oE
!U =I`S7oF =mO5~~"W+v return n; hBjU(}\3 } &KjMw:l #NW+t|E Jt=-> } !+%gJiu: [UA*We 1 Jh3 /* P |tyyjO **SiteInfoBean.java { c#US */ Y(g_h:lf,] package NetFox; CefFUqo4 TQ]gvi|m z2iMpZ public class SiteInfoBean { (oGYnN,2 }PBme'kP `NNP<z+\ private String sSiteURL; //Site's URL m$p}cok#+S private String sFilePath; //Saved File's Path E`o_R=% private String sFileName; //Saved File's Name /_0B5,6R private int nSplitter; //Count of Splited Downloading File iT}>a30]B R iLl\S# '#7k9\ public SiteInfoBean() QPVi& *8_ {//nSplitter的缺省值为5 N4vcd=uG# //default value of nSplitter is 5 EB}B75)x this("","","",5); a;xeHbE } SZF 8InyF ^2~ZOP$A Kk8wlC public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 8"j $=T6;W { c["1t1G sSiteURL= sURL; 6Qkjr</ sFilePath = sPath; ,`bW(V sFileName = sName; },8|9z#pyB this.nSplitter = nSpiltter; NftnbsTmy "z{/*uM2< Cw,a)XB } /x??J4r0 I _KHQ&Z* FBXktSg public String getSSiteURL() Mt4 {
;j26(dH return sSiteURL; s9ix&m } nK;d\DO y||
n9 R4'.QZ-x public void setSSiteURL(String value) 3+Lwtb}XPF { Gd
4S7JE sSiteURL = value; f6Y?),` } sE?%;uBb |HycBTN#E OkciL] public String getSFilePath() %unn{92) { lwQ!sH[M return sFilePath; zDdo RK@ } B~I ]3f E{T3Xwg |KhpF1/( public void setSFilePath(String value) {'{}@CuA2 { mW"e sFilePath = value; }!iopu } -dM~3' B&_:20^y~ TB>_#+: public String getSFileName() aH"d~Y^ { #`_W?-%^ return sFileName; 2U[/"JL } >)WE3PT/O" u.2X" k{f1q>gd public void setSFileName(String value) f!+d*9 { x<l 5wh sFileName = value; &u:U"j } spA|[\Nl 96\FJHtZ 1|p\rHGd public int getNSplitter() <sC(a7i1 { fQ 9af)d return nSplitter; )zWu\JRp } (Mfqzy TIp\- .uA
O.< public void setNSplitter(int nCount) e)HFI|> { wf ]Wm nSplitter = nCount; s>DFAu! } \*MZ1Q*x } L"YQji! <W!T+sMQj >7WT4l)7!b /* iX?j "=! **Utility.java .Yk}iHcW. */ F7} yt package NetFox; 7oE:] j/Kul}Ml\* #sU>L= public class Utility { w?D= A@3'I ; 'cCM[P+ public Utility() ar@,SKU'K { eV_",W LiEEQ <RxxGD } N n_b t]sk[ //线程睡眠 }D1?Z7p public static void sleep(int nSecond) HxR5&o { F~v0CBcAL try{ F4=X(P_6 Thread.sleep(nSecond); Ne9VRM
P } c*owP catch(Exception e) g#P]72TQ { |+h x2?Nv e.printStackTrace (); k6 OO\= } &LV'"2ng8 } G$)q% b;Lz 7IUJHc[R? //日志 =8vwaJ public static void log(String sMsg) Zq{gp1WC { ^Cp;#|g, System.err.println(sMsg); `_&vvJPn@! } Urw =a$ wI7.M
Gt yTc&C)Jba public static void log(int sMsg) Z2;~{$&M+ { FS7D System.err.println(sMsg); B|syb!g } Bz{"K } U7LCd+Z5X `MT.<5H P{RGW.Ci@ /* pw))9~XU **TestMethod.java u$qasII */ k-4z2qB package NetFox; Yi-,Pb?
{DVMs|5;^ 5/hgWG6.t public class TestMethod { ga'G)d3oS {#=o4~u%;H . Z`xNp public TestMethod() U4"&T,'lTL { ///xx/weblogic60b2_win.exe 0{!-h try{ /`qQWB5b SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;Gu(Yoa}y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); RSeav SiteFileFetch fileFetch = new SiteFileFetch(bean); n1x3q/~ fileFetch.start(); Vf(..8 } AO-~dV catch(Exception e){e.printStackTrace ();} 9qq6P! 0W
1bZPM =BD|uIR } =q[+e(,3 uC]c`Ue eiA$) rzy public static void main(String[] args) ?`:+SncI"b { M )v='O<H8 new TestMethod(); ,=pn}\R } fHuWBC_YO } un`4q-S7 点击下载更多相关资料
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