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/* nqf,4MR **SiteFileFetch.java )YqXRm */ T'~!9Q package NetFox; )l#E}Uz import java.io.*; /:FOPPs import java.net.*; !* OJ.W& .(WQYOMl0 Hik3wPnp public class SiteFileFetch extends Thread { m?&1yU9 =yy5D$\ 9`9R!=NM SiteInfoBean siteInfoBean = null; //文件信息Bean &@3H%DP}Ql long[] nStartPos; //开始位置 |p-t%xDdr long[] nEndPos; //结束位置 C/-63O_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 vEn4L0D long nFileLength; //文件长度 M4W5f#C5Ee boolean bFirst = true; //是否第一次取文件 of@#:Qs boolean bStop = false; //停止标志 c}0@2Vf File tmpFile; //文件下载的临时信息 tzh1s
i DataOutputStream output; //输出到文件的输出流 nb>7UN.9 ivz{L- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {+@bZ}57 public SiteFileFetch(SiteInfoBean bean) throws IOException 9rA=pH%<>B { 1u9LdkhnY siteInfoBean = bean; +U3m#Y )k //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); .e3+s* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i _%Q`i if(tmpFile.exists ()) s@7H1)U { RG4 sQ0 bFirst = false; /7YF mI/0 read_nPos(); ]H1I,`=@ } =3v]gOcO else LA)[ip4 { %?Ev|:i`@ nStartPos = new long[bean.getNSplitter()]; qQH]`#P nEndPos = new long[bean.getNSplitter()]; @qHNE,K } f@c`8L@g ~b2wBs)r wLH] <k nxl[d\ap+n } 10U9ZC zO
MA k{Aj^O3gD public void run() y?q*WUh
{ FJ6u.u //获得文件长度 }:~x7|~s: //分割文件 ze]h..,]K //实例FileSplitterFetch yiA<,!;4P //启动FileSplitterFetch线程 _:"<[ >9 //等待子线程返回 Dv/WE>?Aw try{
D N*t~Z3[ if(bFirst) r#Oo
nZ { _Wa.JUbv nFileLength = getFileSize(); [2{1b`e if(nFileLength == -1) ^R@j=_8} { wg]j+r@ System.err.println("File Length is not known!"); yYH 0v7vx+ } |x-S&- else if(nFileLength == -2) 8M`#pN^ { HF.^ysI System.err.println("File is not access!"); E2{FK)qT }
({=gw9f else >lIk9| { PxS8 n?y for(int i=0;i<nStartPos.length;i++) KFwzy U" { yu/`h5&* nStartPos = (long)(i*(nFileLength/nStartPos.length)); [E
] E } c*@E_}C# for(int i=0;i<nEndPos.length-1;i++) n .RhxgC< { w:<W.7y?0 nEndPos = nStartPos[i+1]; _}En/V_ } 9^p;UA nEndPos[nEndPos.length-1] = nFileLength; 4BKI-;v$ } _n` a`2C|m }
i|m3mcI%2 6ZQwBS0Y Q(oN/y3, //启动子线程 ;{"+g)u fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 81i655!Z for(int i=0;i<nStartPos.length;i++) Sh8"F@P8 { "
_ka<R.. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }-6)gWe siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vt9)pMs nStartPos,nEndPos,i); +qwjbA+ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L-k@-)98 fileSplitterFetch.start(); ynhmMy% } ?CA, // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "PpN0Rr siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); CLJ;< // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", TBT:/Vfun nEndPos = " + nFileLength); <h'5cO // fileSplitterFetch[nPos.length-1].start(); oT>(V]*5 Yn G_m] t>$kWd{9e; //等待子线程结束 [a
wjio //int count = 0; %eO0wa$a //是否结束while循环 ]3l 9:| boolean breakWhile = false; iB& 4>+N+ j_.5r&w -#HA"7XOE while(!bStop) sH[ROm { u!W0P6 write_nPos(); +lMX{es\O Utility.sleep(500); Y1J=3Y breakWhile = true; ssN6M./6 ktpaU,% w_{wBL[3e for(int i=0;i<nStartPos.length;i++) hK,Sf ;5V { pj?f?.^ if(!fileSplitterFetch.bDownOver) Xn%pNxUL { L>RP-x> breakWhile = false; ]h
%Wiw break; u2?|Ue@[ } z3;*Em8Ir } _zwG\I|Q if(breakWhile) h9G RI break; MfWyc_ (j3xAA YS *9t
Q{ //count++; -3=#u_ //if(count>4) !74S // siteStop(); W|g4z7Pb } hj.a&% bKN@j'M j?x>_#tIY System.err.println("文件下载结束!"); +yD`3`
E } ?}U(3 catch(Exception e){e.printStackTrace ();} "\o+v|; } )j0TeE1R In<n&ib 7OJ'){R$ //获得文件长度 n+A?"`6*# public long getFileSize() ikvWh<=>H { W1|0Yd ;P int nFileLength = -1; PC-"gi=h try{ +2&@x=xy URL url = new URL(siteInfoBean.getSSiteURL()); a+Kj1ix HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
`yH<E+ httpConnection.setRequestProperty("User-Agent","NetFox"); tAv@R&W, e(GP^oK mSb#Nn6W int responseCode=httpConnection.getResponseCode(); Ke2ccN if(responseCode>=400) [VsKa\9u { 0,89H4 processErrorCode(responseCode); V#S9H!hm$ return -2; //-2 represent access is error E(8*
pI } m;GbLncA 8)10o,#L a@UZb String sHeader; ,l:ORoND *&^:T~|=! w.YiO5|y for(int i=1;;i++) |m^k_d!d {
G(G{RAk> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~5CBEIF(NS //Utility.log(in.readLine()); uYs5f.! ` sHeader=httpConnection.getHeaderFieldKey(i); 65#'\+ if(sHeader!=null) 1]@}|
{ C,ARXW1 if(sHeader.equals("Content-Length")) \1fN0e { \b?" b nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); vnM@QfN break; P;qN(2L/=< } q#,f 4P } /7|V+6jV else ;
Q3n break; 6sx'S?Qa* } rMLp-aR' } pxCK;] catch(IOException e){e.printStackTrace ();} S/e2P|} catch(Exception e){e.printStackTrace ();} C(#u[8 %}Ss,XJ x:7b/j- Utility.log(nFileLength); ?&63#B,iZ /tf5Bv'< !O:y@ return nFileLength; hog=ut } d9;g]uj` _lGdUt 2 |yQZt/*SOZ //保存下载信息(文件指针位置) iB%gPoDCL@ private void write_nPos() w~"KA6^ { o7sT=x9 try{ ->y J5smtY output = new DataOutputStream(new FileOutputStream(tmpFile)); MbZJ;,e? output.writeInt(nStartPos.length); N D(/uyI for(int i=0;i<nStartPos.length;i++) #t:S.A@ { XBb~\p3y // output.writeLong(nPos); HUv/ ~^< output.writeLong(fileSplitterFetch.nStartPos); C9n?@D;S output.writeLong(fileSplitterFetch.nEndPos); kt["m. } M42Ssn) output.close(); K1\a#w } @Z\,q's catch(IOException e){e.printStackTrace ();} ][9%Kl*%@p catch(Exception e){e.printStackTrace ();} DRp~jW(\y } 1DE<rKI clL2k8VS qB0E_y)a //读取保存的下载信息(文件指针位置) {B?Wu3- private void read_nPos() !'&n-Q { @` 1Ds try{ *E/`KUG] DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); |
r&k48@ int nCount = input.readInt(); &]v4@%<J nStartPos = new long[nCount]; vY${;#~| nEndPos = new long[nCount]; R`DKu= for(int i=0;i<nStartPos.length;i++) Nn~~!q { jr /pj? nStartPos = input.readLong(); x7:s]<kE nEndPos = input.readLong(); PT=2@kH } gcPTLh[^Er input.close(); TarIPp } ,9}h catch(IOException e){e.printStackTrace ();} j.w@(<=x catch(Exception e){e.printStackTrace ();} aI6$? wus } h]5C|M| JORGj0v aB{vFTD5 private void processErrorCode(int nErrorCode) v/68*,z[ { j53*E
)d System.err.println("Error Code : " + nErrorCode); h_:C+)13`x } vq^f}id F+,~v- }z _ //停止文件下载 "$ Y_UJT7 public void siteStop() jkiFLtB@V { bx{$Y_L+p bStop = true; w)kNkD for(int i=0;i<nStartPos.length;i++) @eD):Y fileSplitterFetch.splitterStop(); tD(7^GuR +cgSC5nR hb zC#@q } wKZ$iGMbz } \ 3wfwu.q //负责部分文件的抓取 7\$qFF-y **FileSplitterFetch.java 75"f2; */ -:2$ % package NetFox; dJ2Hr;Lc >/kcdWl uxtWybv import java.io.*; Q[vJqkgT import java.net.*; Kwefs;<E? \Xm,OE_v" &]e'KdXF public class FileSplitterFetch extends Thread { s2'yY(u/ TUV&vz{ ,SynnE68 String sURL; //File URL Szq/hv=Q long nStartPos; //File Snippet Start Position < Z{HX[y long nEndPos; //File Snippet End Position L;VoJf int nThreadID; //Thread's ID Cjqklb/ boolean bDownOver = false; //Downing is over iop2L51eJ boolean bStop = false; //Stop identical kzn5M&f> FileAccessI fileAccessI = null; //File Access interface Vr6@>@SC U3T#6Rptl cC=[Saatsf public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Xu<k3oD7 { f&eK|7J_Yf this.sURL = sURL; kbTm^y" this.nStartPos = nStart; f,V<;s this.nEndPos = nEnd; @ezH'y-v nThreadID = id; sYe?M, fileAccessI = new FileAccessI(sName,nStartPos);//定位 R< ,`[* Z } "= 6_V?&w :3XA!o&.T3 @wpN6 / public void run() '(f&P=[b { #E?(vA1 while(nStartPos < nEndPos && !bStop) Mr;E<Lj ^K { ,k{#S?:b (i34sqV$m WG N=Y~E try{ d
F9!G;V URL url = new URL(sURL); =yr0bGy`- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y4*U6+ #. httpConnection.setRequestProperty("User-Agent","NetFox"); pP*zq"o String sProperty = "bytes="+nStartPos+"-"; C\/xl#e<@ httpConnection.setRequestProperty("RANGE",sProperty); co~Pyj Utility.log(sProperty); f!oT65Vmi %+8F'&X P_?gq>E8 InputStream input = httpConnection.getInputStream(); ,TXTS*V? //logResponseHead(httpConnection); W3IpHV xC*6vH]? T*#/^%HSG byte[] b = new byte[1024]; Gb8D[1=u= int nRead; ,4zmb`dP< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Y?
x, { @y='^DQ* nStartPos += fileAccessI.write(b,0,nRead); >TOu|r //if(nThreadID == 1) +W:=e,= // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S0~2{G"v } =U #dJ^4P m@"QDMHk. #JgH}|&a$ Utility.log("Thread " + nThreadID + " is over!"); W%T>SpFl bDownOver = true; OK{quM5 //nPos = fileAccessI.write (b,0,nRead); tSVc|j } qQA}Z*(m catch(Exception e){e.printStackTrace ();} k5D%y3|9 } (@%gS[] } V.O(S\ xl6,s>ob 7![,Q~Fy //打印回应的头信息 M,/mE~ public void logResponseHead(HttpURLConnection con) o*DN4oa) { \@8+U;d for(int i=1;;i++) Cnbz=z { v}1QH String header=con.getHeaderFieldKey(i); 5jd,{< if(header!=null) 1QLbf*zeIW //responseHeaders.put(header,httpConnection.getHeaderField(header)); r<K(jG[:{f Utility.log(header+" : "+con.getHeaderField(header)); GliwY_ else k.uMp<)D break; zaah^.MA| } MYla OT } ^Wc@oa` V}dJ.I /# FrTi+& < public void splitterStop() AWP"b?^G| { ]|MEx{BG- bStop = true; A%`[mc]4# }
k\WR ] 1#.>a$> G'6@+$ppS } Qp/QaVQ+ Tav*+ H*[M\gN$ /* 9?0^ap,T **FileAccess.java ``ou/Z *//文件访问(定位,写) JBJhG<J package NetFox; W_kHj}dj,p import java.io.*; kPVO?uO `glBV`?^ UD8op]>L public class FileAccessI implements Serializable{ xZ6~Ma2z vH#huZA?7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 g=;% RandomAccessFile oSavedFile; |2abmuR0 long nPos; W}5xmz kL$!E9 B?4boF?~ public FileAccessI() throws IOException xL{a { >N]7IU[- this("",0); 95YL]3V } %]>KvoA pgOQIzu KO]T<R
h< public FileAccessI(String sName,long nPos) throws IOException eu(:`uu { +tVaBhd! oSavedFile = new RandomAccessFile(sName,"rw"); MFb9H{LA this.nPos = nPos; ;~"FLQg@ oSavedFile.seek(nPos); 5<UVD:~z } s (zL gREzZ+([ +xrr?g public synchronized int write(byte[] b,int nStart,int nLen) f ` R/
i { <4P4u*/o int n = -1; B5X(ykaX~ try{ f6p-s
y> oSavedFile.write(b,nStart,nLen); G5CI<KRK# n = nLen; *q()f\ } @>p<3_Y1 catch(IOException e) j!]YNH@ { C}_ ojcR e.printStackTrace ();
hRs&t,{& } CC L m^bNuo VzY8rI return n; K?BOvDW"` } B]uc<`f CE/Xfh'44 P*I}yPeb } EL(nDv 1IZ3=6 MBqt&_?K /* JwAYG5W **SiteInfoBean.java f}x.jxY? */ 22.8PO0 package NetFox; Bs O+NP wM2*# FLGk?.x$\ public class SiteInfoBean { fpFhn R)mu2^ [uI|DUlI6o private String sSiteURL; //Site's URL 1+}{8D_F private String sFilePath; //Saved File's Path 8C67{^`:: private String sFileName; //Saved File's Name 9Hf9VC3 private int nSplitter; //Count of Splited Downloading File vTJ}8 %k'!Iq+ c.>oe*+ public SiteInfoBean() :TJv=T'p' {//nSplitter的缺省值为5 jO!y_Y]B //default value of nSplitter is 5 yuat" Pg this("","","",5); R}q>O5O } r\/9X}y4z UFp,a0| :9^;Qv* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) bdQ_?S( { d`
jjGEj sSiteURL= sURL; qzf!l"bT sFilePath = sPath; 2T V X)q<\ sFileName = sName; m^GJuPLW this.nSplitter = nSpiltter; Si6al78 LIZRoG8 ha(Z< } .y@oz7T5 wPwXM! *=+td)S/1 public String getSSiteURL() *# tJM.Z { ;|vpwB@B return sSiteURL; <gJU?$ } :=wTvz N4L|;? ^eR%N8Z public void setSSiteURL(String value) h-Fn? { (`sH3&Kl sSiteURL = value; "CUty"R8 } 1n:8s'\ ?<(m
5Al7 [^U#Qj)hL public String getSFilePath() d5D$&5Ec { n&-qaoNl return sFilePath; 3b+d"`Y^S } 9Hc$G{[a $!8-? ?ML PDrZY.- public void setSFilePath(String value) =gJb^
Gx(w { ,'p2v)p^4 sFilePath = value; \H=&`? } !+L/Khw/C ]y,==1To rld67'KcE public String getSFileName() `<\1[HJ\ { X&0 uI*r return sFileName; RV5n,J } uWM{JEOl \Dd-Xn_b {
T-'t/0e( public void setSFileName(String value) Gcig*5 { BbgnqzU sFileName = value; 1#0{@35 } ++V=s\d7 +;#Y]xy: 7tcPwCc{ public int getNSplitter() Kd=%tNp { ? P(
ZA return nSplitter; BI $ } m3mp/g.> !!`!|w 't6V:X public void setNSplitter(int nCount) /)4I|"}R0I { _g~qu
[1 nSplitter = nCount; yp66{o
} {3.r6ZwCn } OU/MiyP2 >]W)'lnO > 3&: 5 /* o9F/y=.r= **Utility.java K00
87}H */ s;64N'HH package NetFox; /C4^<k\ <K8\n^i~c wyQzM6:,yX public class Utility { iv>SsW'p_ 4*'pl.rb> T)Y=zIQ1]7 public Utility() j&
<i& { 6Qx#%,U^ J wAxrc+ lhw ,J]0* } I+dbZBX FKT1fv[H //线程睡眠 H<}^'#"p public static void sleep(int nSecond) ;uW}`Q< { tPGJ<30 try{ \l.-eu'O Thread.sleep(nSecond); ^",ACWF4Sk } |j VM&R2s catch(Exception e) =Q[b'*o7 { Nqrmp" ] e.printStackTrace (); 1f8GW } -tyK~aasQ } 4=Krq6{ H8`(O"V //日志 1$81E. public static void log(String sMsg) V2i@.@$j { _<NMyRJo System.err.println(sMsg); FDv+*sZ } a(v>Q*zNP !}r%
u." NN1$'"@NL public static void log(int sMsg) ^pe{b9c { +{L<? " System.err.println(sMsg); YBP:q2H } K!] 1oy'V } M>>qn_yq4 ,i,q!M{- v0ES; /* [w&$| h:; **TestMethod.java YI.w-K\ */ `A,g] 1C: package NetFox; A%{W{UP8N LJ(1RK GCz A^2Uzmzl? public class TestMethod { &g~ wS@ KhW;RD }GZ}Q5 public TestMethod() `p7&>
BOA { ///xx/weblogic60b2_win.exe {nvLPUL try{ GKFq+]W SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 3RR_fmMT) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 1[t=XDz/e SiteFileFetch fileFetch = new SiteFileFetch(bean); U=o"32n+ fileFetch.start(); ^=^z1M2P } k!KDWb
catch(Exception e){e.printStackTrace ();} -~QHqU. 8-Hsgf.* Z+StB15 } 3:f[gV9K r@o6voX 0`I-2M4F*Q public static void main(String[] args) DmBS0NyR7Y { Z KOXI%~Mc new TestMethod(); {vN}<f` } YNBHBK4; } ,s_T pq 点击下载更多相关资料
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