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/* ?!rU
|D **SiteFileFetch.java })q]gMj */ OY$7`8M[ package NetFox; 9.jG\i import java.io.*; OfW%&LAMQ import java.net.*; ~LSy7$rz YqkA&qL]#; ^75pV%<% public class SiteFileFetch extends Thread { :E}6S "hz>{oe i^~sn `o SiteInfoBean siteInfoBean = null; //文件信息Bean $2;-q8+ long[] nStartPos; //开始位置 ,Z >JvTnH long[] nEndPos; //结束位置 OrzM
hQaf FileSplitterFetch[] fileSplitterFetch; //子线程对象 T$f:[ye]Z long nFileLength; //文件长度 zv&ePq\# boolean bFirst = true; //是否第一次取文件 m<~>&mWr boolean bStop = false; //停止标志 '! #On/ File tmpFile; //文件下载的临时信息 L,tZh0 DataOutputStream output; //输出到文件的输出流 ]U#JsMS 6Uch0xha! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) p^}L public SiteFileFetch(SiteInfoBean bean) throws IOException ^"PfDTyA { g6HphRJ5s siteInfoBean = bean; T,A!5V>cX //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5R&x{jf$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); |)~Ex 9%ev if(tmpFile.exists ()) wbn^R' { ?]759,Q3L bFirst = false; ;B,nzx(L read_nPos(); ?=TL2"L } +!D=SnBGs else Zjw!In|vC { 02;f2;I nStartPos = new long[bean.getNSplitter()]; {(8U8f<'=y nEndPos = new long[bean.getNSplitter()]; YWybPD4\( } >cC Gx !k4 }v'= AEi WL.*. SjFF=ib } qQwJJjf y^5T/M 6tDg3`w> public void run() 8ct+?-3g { oSpi{ $x //获得文件长度 `M towXj //分割文件 }(8D!XgWa //实例FileSplitterFetch z0EjIYI[N //启动FileSplitterFetch线程 #p']-No //等待子线程返回 L{4),65 try{ j=`y
@~ if(bFirst) qiF@7i { DKe6?PG nFileLength = getFileSize(); aUsul'e;M if(nFileLength == -1) TsoCW]h { [i2A{(x System.err.println("File Length is not known!"); WV5r$ } |_xZ/DT else if(nFileLength == -2) ]b5%?^Z# { ,+swH;=7#r System.err.println("File is not access!"); |?4~T: } {o Q(<&Aw else Yg\{S<wr { 5]A$P\7~1 for(int i=0;i<nStartPos.length;i++) fU\k?'x_ { fzq'S]+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5WrIg(l } a>-}\GXTA for(int i=0;i<nEndPos.length-1;i++) n23%[#,r { ^K1~eb*K nEndPos = nStartPos[i+1]; `</=AY> } C}dKbs^g| nEndPos[nEndPos.length-1] = nFileLength; <(u3+`f1s } iX0]g45o } }z9I`6[ 7UeE(=Hr5 uD0(aqAZ //启动子线程 DctX9U( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; IG2 `9rR for(int i=0;i<nStartPos.length;i++) 60Xl. { [qO5~E`; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tal>b]B; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D;16}D nStartPos,nEndPos,i); p 02nd.R6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); SXT@& @E fileSplitterFetch.start(); =rf)yp-D } (Von;U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WcV\kemf siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); wsdB;
6%$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [RGC!}"mr nEndPos = " + nFileLength); ,6y-.m7> // fileSplitterFetch[nPos.length-1].start(); E-5ij,bHv3 W07-JHV% AaCnTRG //等待子线程结束 8gu'dG = //int count = 0; wI1M0@}PV //是否结束while循环 &sr:\Qn X/ boolean breakWhile = false; iMOPD}`IX bn<I#ZH2 !9ceCnwbNN while(!bStop) 46Y7HTwE { df21t^0/ write_nPos(); *Dd(+NI Utility.sleep(500);
]*kP> breakWhile = true; =Ov;'MC 9^b7jw )n[`Z# for(int i=0;i<nStartPos.length;i++) Sh~ 8jEk { JWUv H if(!fileSplitterFetch.bDownOver) 1%]{0P0?[ { kp#c:ym breakWhile = false; )Bm^aMVl3 break; j:de}!wc } it/C y\f } ]XpU'/h>q; if(breakWhile) H$=h- break; OW[/%U> kcma/d
WL]Wu.k //count++; 6bA~mC^& //if(count>4) )+Y\NO?O // siteStop(); 6a 2w-}Fs } g# 9*bF K\Y6
cj fxtYo,;$ System.err.println("文件下载结束!"); @'NaA SB } =oKPMmpCZ catch(Exception e){e.printStackTrace ();} <Vr]2mw } lhIr]'?l Gr"2G,,VI wFoR,oXtL/ //获得文件长度 U#FJ8CD&u public long getFileSize() ShsP]$Yp { fO^EMy\ int nFileLength = -1; .eDxIWW+ft try{ mXN1b! URL url = new URL(siteInfoBean.getSSiteURL()); 6"rFfdns HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gl(6m`a> httpConnection.setRequestProperty("User-Agent","NetFox"); wZ\e3H z n_!]B_Vd$ ([4{n int responseCode=httpConnection.getResponseCode(); [w#x5Xsn if(responseCode>=400) dTU.XgX)1^ { :+Z>nHe processErrorCode(responseCode); 8'g*}[ return -2; //-2 represent access is error ?[L0LL?ce } I;|5C=! [u9S+:7" B#Oc8`1Y String sHeader; {*5;:QnT 7:R{~|R /="D]K)%b8 for(int i=1;;i++) |]]pHC_/W { At^DY!3vx //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); NGb!7Mu9 //Utility.log(in.readLine()); [y&h_w. sHeader=httpConnection.getHeaderFieldKey(i); @gl%A&a if(sHeader!=null) MCWG*~f { u_/OTy if(sHeader.equals("Content-Length")) 'mY,>#sT { {]/Jk07 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); "`1of8$X7 break; W)Kpnb7 } #9W5 } nF!_q;+Vp else W<Vzd4hR break; :xUl+(+ } iYfLo"> } {$QF*j catch(IOException e){e.printStackTrace ();} {dSU
\': catch(Exception e){e.printStackTrace ();} iR}i42Cu 7+Jma! o 2M(PH]D Utility.log(nFileLength); BoiIr[ ( h+'eFAZ $xn%i\ return nFileLength; krnk%ug } dW=D] ?\p%Mx? /o06h y //保存下载信息(文件指针位置) !A^w6Q;`V private void write_nPos() 2O)Kn
q { RxDxLU2kt try{ yfw>y=/p output = new DataOutputStream(new FileOutputStream(tmpFile)); r@@eC[' output.writeInt(nStartPos.length); %[bO\, for(int i=0;i<nStartPos.length;i++) }zfLm`vJ { yOCcp+`T} // output.writeLong(nPos); 0f#a_ output.writeLong(fileSplitterFetch.nStartPos); ]zR;%p output.writeLong(fileSplitterFetch.nEndPos); X=c
,`&^ } m=y,_Pz>U output.close(); Y|N vBr } Z-sN4fr a catch(IOException e){e.printStackTrace ();} fM[fS?W catch(Exception e){e.printStackTrace ();} kKk |@ } &u`rE"" nR |LV'( 'hHX"\|RA //读取保存的下载信息(文件指针位置) 2Q_{2(nQb private void read_nPos() GHsdLe=t0# { !vo '8r?& try{ ][K8\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >p#d;wK4_ int nCount = input.readInt(); U@t?jTMBkO nStartPos = new long[nCount]; VEYKrZA nEndPos = new long[nCount]; tS/APSY for(int i=0;i<nStartPos.length;i++) SIBIh- L { [,?A$Z*Z| nStartPos = input.readLong(); f+88R=-u6S nEndPos = input.readLong(); .$s|T } k-PRV8WO input.close(); PNxO\Rc } O}iKPY8K catch(IOException e){e.printStackTrace ();} {aa,#B]i catch(Exception e){e.printStackTrace ();} JP% ;rAoJ } Pv$"DEXA2 6g,3s?aT 8{=(#] private void processErrorCode(int nErrorCode) mbG^fy' { WF.$gBH" System.err.println("Error Code : " + nErrorCode); 8_,wOkk_B } d.(]V2X.J =d4',[O +z?f,`.* //停止文件下载 q>l kLHS public void siteStop() f%%En5e+ { 5N</Z6f'o bStop = true; NTX+7< for(int i=0;i<nStartPos.length;i++) [-94=|S @ fileSplitterFetch.splitterStop(); iW%0pLn ,7$uh): kk./-G } 3:gO7Uv
} ^>}[[:( 6/ //负责部分文件的抓取 [67f; ?b **FileSplitterFetch.java `,]PM)iC */ -#z'A package NetFox; XlcDF|?{. Evgq}3 0JL6EL>_ import java.io.*; k.f:nv5JO import java.net.*; T1W9@9,s vh.tk^& "YU~QOGx@ public class FileSplitterFetch extends Thread { z{+; '9C D7'0o`| Y `p&*O String sURL; //File URL k yA(m;r long nStartPos; //File Snippet Start Position ill' KPy long nEndPos; //File Snippet End Position ED_5V@ int nThreadID; //Thread's ID T7nX8{l[RG boolean bDownOver = false; //Downing is over
0
9'o boolean bStop = false; //Stop identical v8(u9V%?6 FileAccessI fileAccessI = null; //File Access interface DMpd(ws ba:^zO^ (j
Q6~1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException o:\j/+] { `D4'`Or-U this.sURL = sURL; h/~BUg' this.nStartPos = nStart; d'nuk#r this.nEndPos = nEnd; n&&U9sf? nThreadID = id; kF~e3A7C fileAccessI = new FileAccessI(sName,nStartPos);//定位 :rc[j@|pH } X51$5% Fd.d( 1MFpuPJk public void run() | (9FV^_ { $ aBSr1 while(nStartPos < nEndPos && !bStop) 6HQwL\r79 { A{T@O5ucj F09AX'nj RLX^'g+P try{ ;XuEMq,Di URL url = new URL(sURL); n,LKkOG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]KT,s]. httpConnection.setRequestProperty("User-Agent","NetFox"); [:'?}p String sProperty = "bytes="+nStartPos+"-"; \`5u@Nzx httpConnection.setRequestProperty("RANGE",sProperty); ,B>b9,~3a Utility.log(sProperty); 3`8xh9O $ !=:ES [<$d@}O InputStream input = httpConnection.getInputStream(); q9]L!V9Rv //logResponseHead(httpConnection); LZ dNG\- r}Av" _
9]3S>Rn byte[] b = new byte[1024]; l~c>jm8. int nRead; e!'u{>u while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4'|:SyOm { J, >PLQAa nStartPos += fileAccessI.write(b,0,nRead); }f*S 9V //if(nThreadID == 1) rmJ847%y` // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <Wq{ V;$ } a$&6a
o:*iT=l <7) 6*u Utility.log("Thread " + nThreadID + " is over!"); Lxrn#Z eM bDownOver = true; 2 -8:qmP( //nPos = fileAccessI.write (b,0,nRead); fbkjK`_q } P#oV ^ catch(Exception e){e.printStackTrace ();} {Oszq(A } >:|q J$J. } nP5fh_/ 1OS3Gv8jc~ zjE4v-H:l //打印回应的头信息 cNvcpv public void logResponseHead(HttpURLConnection con) ( "z;Q?( { S3wH
M for(int i=1;;i++) qRLypm { 6%1o<{(%f String header=con.getHeaderFieldKey(i); T+!kRigN~P if(header!=null) ?!-im*~w //responseHeaders.put(header,httpConnection.getHeaderField(header)); wB"Gw` D Utility.log(header+" : "+con.getHeaderField(header)); 5(Oc"0''H else #0H[RU? break; >Sah\u` } 4+bsG6i } Okc*)crw ;Bi{;>3 ?Qk#;~\yB public void splitterStop() )CQ}LbX Zy { 3Re\ T bStop = true; DJUtuex } \(L^ /]}G) LXl! !i% yK3z3"1M? } EV$n>. "KwKO8f NE"fyX` /* 7C^ nk
z **FileAccess.java OSk9Eb4ld *//文件访问(定位,写) h (2k;M^s package NetFox; gp2)35 import java.io.*; {*Pp^r ![%,pip2/& m"]ys# public class FileAccessI implements Serializable{ M+:wa@Kl t68RWzqiG[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 TaG-^bX8B RandomAccessFile oSavedFile; HskN(Ho long nPos; bux-t3g7+ 8?XZF[D X.<R['U&\ public FileAccessI() throws IOException l[ k$O$jo { :B~c>: this("",0); YZ@-0_Z } \f#ao<vQm Ymom 0g+f YvX I public FileAccessI(String sName,long nPos) throws IOException Zlo,#q { ")
D!OW] oSavedFile = new RandomAccessFile(sName,"rw"); qC1@p?8$ this.nPos = nPos; -^DB?j+ oSavedFile.seek(nPos); UtN>6$u
}
jfamuu 7 B?Skw{& ;0'v`ob'.? public synchronized int write(byte[] b,int nStart,int nLen) Z
ngJ9js { @35shLs int n = -1; wP*Z/}Uum+ try{ ,jmG!qJb oSavedFile.write(b,nStart,nLen); b??1Up n = nLen; (P-<9y@ } K2 2Xo<3 catch(IOException e) g_U69
z { X Rn=;gK%J e.printStackTrace (); +&@0;zSga } UEUTu}4y eHR<(8c'f pJ[Q.QxU return n; )VC) } } $'q(Z@ nCU4a1rZ .&y1gh!= } X[<9+Q-& at!?"u :F&WlU$L /* )w-?|2-w5 **SiteInfoBean.java CCV~nf */ Rd)QVEk>SD package NetFox; }T,uw8?f! CggEAi~ O;2 u1p'iP public class SiteInfoBean { b3+PC$z2h S6]': 1oPT8)[U private String sSiteURL; //Site's URL >q`X%&l_ private String sFilePath; //Saved File's Path N;Bal/kd2 private String sFileName; //Saved File's Name 'Nh^SbD+_| private int nSplitter; //Count of Splited Downloading File bd4q/w4q .+>}}, x<(h9tB public SiteInfoBean() /V&Y@j {//nSplitter的缺省值为5 kN)ev?pQ[ //default value of nSplitter is 5 ~6tY\6$9f this("","","",5); YbKW;L&Ff } a0R]hENC 1*fA>v RulIzv public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (yfTkBy { q<VhP2R sSiteURL= sURL; (P ?9Jct sFilePath = sPath; T (qu~} sFileName = sName;
cO:x{~ this.nSplitter = nSpiltter; {\B!Rjt[T %[J( ,rm |{
kB` } q`P:PRgM `f'P cF6|IlhO public String getSSiteURL() duI8^&| { \cG'3\GI return sSiteURL; \1ZfSc } >EY0-B o&]qjFo\m k;sUD mrO public void setSSiteURL(String value) @UKd0kxPN{ { C1=[\c~jw sSiteURL = value; _bX)fnUu } KjadX&JD c\Dv3bF utr_fFu public String getSFilePath() U^xFqJY6 { L$g;^@j return sFilePath; pfT7 } (I$hw"%& AF@C9s _PIk,!< public void setSFilePath(String value) ?Rdi"{.wI { o! 8X< o sFilePath = value; Z]tz<YSkG } \4ZQop wQ5__"D yC[}gHv public String getSFileName() &~i1 @\] { *4ID$BmO return sFileName; (<h,R@: } "P6MLf1 /=N`P &R# ,0~=9dR public void setSFileName(String value) T4[eBO { 0PN{
+<?. sFileName = value; 6[cMPp x } &\LbajP:+ tm$3ZzP4 .MKxHM7 public int getNSplitter() KnuqU2<
{ { SC# return nSplitter; Vh&uSi1V } 99`xY$ c0@v`-9 344- ~i* public void setNSplitter(int nCount) 5q\]] LV> { TtzB[F nSplitter = nCount; [Y[|:_+5 } fA8 ,wy|> } ?g 3sv5\u COap* 'G&w[8mqY /* %EuSP0 **Utility.java `!i>fo~ */ <*L8kNykK package NetFox; E:2Or~ [Mx+t3M p|zW2L public class Utility { s^cHR1^ [8ih-k o.,hCg)X public Utility() 8O]$)E { ?n}L+| c5JxKU_ >B==*,| }
dwRJ0D]& ;*8$BuD //线程睡眠 i]P]o) public static void sleep(int nSecond) Na4\)({ { 0VPa=AW try{ +S$x}b'5q Thread.sleep(nSecond); ]c08` } v''$qMQ) catch(Exception e) MZ0 J/@( { ,ecFHkT> e.printStackTrace (); ]\{EUx9 } G=DRz F } 8IO4>CMkv HM`;%0T0( //日志 2gA6$s7 public static void log(String sMsg) _T1|_9b { `U(FdT System.err.println(sMsg); kxh
$R> } KcHW>IBxdv D ,nF0p LVX.s tN#p public static void log(int sMsg) C&\#{m_1B { d;K,2 System.err.println(sMsg); \]zHM.E1 } u-D%: lz85 } Ay[6rUO 8/k*"^3 F8q|$[nH /* BPW2WSm@< **TestMethod.java U2;_{n*g% */ WmeV[iI package NetFox; {$Qw]?Yv Z<`QDBN"4 3qP!
(* public class TestMethod { nBR4j?':i yN9/'c~ Mp}U>+8 public TestMethod() +d<o2n4! { ///xx/weblogic60b2_win.exe eGjEO&$ try{ *5u0`k^j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 'bTtdFvJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `2G 0B@ SiteFileFetch fileFetch = new SiteFileFetch(bean); ^)TZHc2a[ fileFetch.start(); DKR2b`J } Yf1?3(0O catch(Exception e){e.printStackTrace ();} nPE{Gp) } 8K'3iw>z G@s
rQum( } `#R[x7bA1 *y0TtEd; tmKHT public static void main(String[] args) #mFIZMTRd { J.$N<. new TestMethod(); EjrK.|I0 } ^8OK.iC } \Cx2$<8 点击下载更多相关资料
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