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/* G.'+-v=\] **SiteFileFetch.java X6+qpp */ M@1r:4CoKH package NetFox; n(nBRCG)o import java.io.*; ixm&aW6< import java.net.*; 3ss6_xd+ 3l<S}k@M) q_W0/Ki8 public class SiteFileFetch extends Thread { I:V0Xxz5t dBV7Te4L Fk;oE'"D SiteInfoBean siteInfoBean = null; //文件信息Bean /%aiEhL long[] nStartPos; //开始位置 { x0 t long[] nEndPos; //结束位置 \,Lo>G`! FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;< )~Y- long nFileLength; //文件长度 l%z< (L5 boolean bFirst = true; //是否第一次取文件 juF{}J2 boolean bStop = false; //停止标志 D0(xNhmKz File tmpFile; //文件下载的临时信息 YKbCdLQ DataOutputStream output; //输出到文件的输出流 e6B{QP#jq mV73
\P6K //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3cS2gxF public SiteFileFetch(SiteInfoBean bean) throws IOException @4(k( { d%I"/8-J siteInfoBean = bean; }0`nvAf //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o`zr> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); O|A_PyW if(tmpFile.exists ()) +`M!D }! { AB Xl bFirst = false; CxhY$%C (L read_nPos(); +bK.NcS } %B5r"=oO else kL7#W9 { @UBjq%z nStartPos = new long[bean.getNSplitter()]; V~ ~=Qp+. nEndPos = new long[bean.getNSplitter()]; rdnno } 6J~12TU, )4?x5# 22<0DhJ @\oz4^ } 0c.s
- Giq=*D+ FEPXuCb public void run() Nfe>3uQK { OX%MP!#KU //获得文件长度 DcMJ^=r8O: //分割文件 UY2X //实例FileSplitterFetch p_ Fy>j //启动FileSplitterFetch线程 P+t#4J //等待子线程返回 jEc|]E try{ ri C[lB if(bFirst) LAx4Xp/ { t:JI!DR nFileLength = getFileSize(); {:c]|^w6 if(nFileLength == -1) vvB(r! { "'^4*o9 System.err.println("File Length is not known!"); kVI#(uO } Hv]7e| else if(nFileLength == -2) 7@.cOB`y@3 { }7{t^>;D System.err.println("File is not access!"); H4OhIxK } T9 <2A1 else o ]Jv;Iy@? { :RSz4 for(int i=0;i<nStartPos.length;i++) \^1+U JU { Cp^@zw*/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); sfr(/mp( } h0?2j)X_
for(int i=0;i<nEndPos.length-1;i++) p
<eC<dtu { c[}(OH nEndPos = nStartPos[i+1]; Md)zEj`\ } 1%M&CX nEndPos[nEndPos.length-1] = nFileLength; "+KJop } Lf:uNl*D } d;Hn#2C lcON+j 9 7%0;a8 //启动子线程 UE _fpq fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =k}SD96 for(int i=0;i<nStartPos.length;i++) 9[v1h,L { G{aT2c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6,1b=2G siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), @L84>3O nStartPos,nEndPos,i); vgn@d,v Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
N-lGa@ j fileSplitterFetch.start(); 71#I5*8 } 8,?v?uE // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3qH QX?a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); e]ig!G] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", GwsY-jf nEndPos = " + nFileLength); qP!eJ6[Nh" // fileSplitterFetch[nPos.length-1].start(); f0+2t.tj z^o 1GY !.7udYmB //等待子线程结束 5q{h 2).) //int count = 0; ufa41$B'yG //是否结束while循环 ZA~Z1Mro#" boolean breakWhile = false; d
"BW/%m|g d
{lP va/m~k|i while(!bStop) Z>F^C}8f { puSLqouTM write_nPos(); t<uYM Utility.sleep(500); x+? 9C breakWhile = true; l>lW]W K.tlo^#^B[ K*K1(_x= for(int i=0;i<nStartPos.length;i++) G
DSfT{kK\ { wYeB)1. if(!fileSplitterFetch.bDownOver) G@!z$ { Y izE5[* breakWhile = false; q^8EOAvnZ break; 7>o.0 } )j6eE+gF } rgIrr5 if(breakWhile) 0m[dP break; fi PIAT} [{[N( g&d :(3|HTz //count++; UIJx* //if(count>4) 5FvOznK^e // siteStop(); Mro4`GL } ;SwC&.I r'/;O @b&84Gn2
r System.err.println("文件下载结束!"); ,reJ(s } v|Jlf$> catch(Exception e){e.printStackTrace ();} `Y?t@dd } Rz%e>) 9V1cdb~?"T xIbMs4'iEx //获得文件长度 Ob +9W public long getFileSize() }m]q}r { jX=lAs~6 int nFileLength = -1; huFz97?y( try{ yT /EHmJ URL url = new URL(siteInfoBean.getSSiteURL()); W-2i+g) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,1n
>U?5 httpConnection.setRequestProperty("User-Agent","NetFox"); 1V&PtI3!! u.|~
UgHf*m int responseCode=httpConnection.getResponseCode(); *}b]rjsj if(responseCode>=400) uPyVF-i { BW[5o3
i processErrorCode(responseCode); l4'~}nn(Y return -2; //-2 represent access is error Ry;$^.7% } uq7T{7~< ;|ub!z9GG 7 &)])
{Q String sHeader; =6nD0i9+ I %_MV _"f :` for(int i=1;;i++) 1IH[g*f { ~&G4)AM //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); B:oF;~d/, //Utility.log(in.readLine()); S0w> hr sHeader=httpConnection.getHeaderFieldKey(i); K!{5[G if(sHeader!=null) B+VuUt{S { w8M2N]&: if(sHeader.equals("Content-Length")) NGzgLSm\ { Bt~s*{3$8 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); gtU1'p" break; ^[# &
^[-V } T{MC-j _T9 } z_SagU,\ else 6vz1*\:H~ break; ;b~~s.+ } D5A=,\uk } q^Tis>*u6 catch(IOException e){e.printStackTrace ();} 3{J.xWB@: catch(Exception e){e.printStackTrace ();} iyM^[/-R6 qc8Ta" h8}8Lp(/' Utility.log(nFileLength); 6 DP[g8 (!zM\sF %`\]Y']R return nFileLength; !Tfij(91 } ?ApRJm:T !oMt_k X gbGTG(:1S //保存下载信息(文件指针位置) b~Z=:'m8 private void write_nPos() WcGXp$M { gg]~2f try{ qi=3L output = new DataOutputStream(new FileOutputStream(tmpFile)); 960qvz! output.writeInt(nStartPos.length); Fj=NiZ= for(int i=0;i<nStartPos.length;i++) 981!2* { FBYODw // output.writeLong(nPos); 1D1b"o output.writeLong(fileSplitterFetch.nStartPos); LM1b I4 output.writeLong(fileSplitterFetch.nEndPos); @>O&Cpt } Es;;t83p output.close(); &5q{viI } !<Z{@7oH catch(IOException e){e.printStackTrace ();} 0j@Ix EPs catch(Exception e){e.printStackTrace ();} oh&Y<d0 } Y><(? tA qs2 h)o]TV //读取保存的下载信息(文件指针位置) `^%GN8d}nm private void read_nPos() H1Xov r { $FCw$ +w try{ .
bG{T| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); v MWC(m int nCount = input.readInt(); 6y@<?08Q nStartPos = new long[nCount]; b\L)m ( nEndPos = new long[nCount]; @,vv\M0)p for(int i=0;i<nStartPos.length;i++) Ihef$, { y h-9u nStartPos = input.readLong(); :yD@5) nEndPos = input.readLong(); ~7BX@? } tJ>d4A;8x input.close(); @7|)RSBQz } +~:0Dxv W catch(IOException e){e.printStackTrace ();} EG1x catch(Exception e){e.printStackTrace ();} Ph\F'xROe }
* D3 ^V,@=QL3U Kz^ hQd private void processErrorCode(int nErrorCode) Ib(,P3 { p,^>*/O> System.err.println("Error Code : " + nErrorCode); hGKdGu`0 } 1
'%-y (QhAGk&lu |Kn^w4mN //停止文件下载 -(ER4# public void siteStop() n(# c`t* { sp,(&Y]US bStop = true; 3DHvaq q7 for(int i=0;i<nStartPos.length;i++) C9+Dw#-fV fileSplitterFetch.splitterStop(); w`38DF@K T/3;NXe6E 3?6 Ber y= } :if5z2PE/ } lZ+/\s,]| //负责部分文件的抓取 p!V)55J* **FileSplitterFetch.java n%Rjt!9 */ /3;=xZq package NetFox; ~M(pCSJ[ -y<rM0"NE "URVX1#(r import java.io.*; :4b- sg# import java.net.*; D`5:
JR-{ LDSbd,GF -kt1t@O public class FileSplitterFetch extends Thread { 0honHP vV2o[\o^ DOA[iT";4 String sURL; //File URL KN|'|2/| long nStartPos; //File Snippet Start Position /Ir 7
DZK long nEndPos; //File Snippet End Position aw;{<?* int nThreadID; //Thread's ID <4S F~i boolean bDownOver = false; //Downing is over e1Dj0s?i~K boolean bStop = false; //Stop identical NdaM9a#TZ FileAccessI fileAccessI = null; //File Access interface +# A|Zp< $::51#^Wg "otr+.{`* public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [ )B@ { 3<yCe%I: this.sURL = sURL; C5d/)aC this.nStartPos = nStart; ">rsA&hN- this.nEndPos = nEnd; nT(!HDH nThreadID = id; 30:HRF(: fileAccessI = new FileAccessI(sName,nStartPos);//定位 U5T^S } 4ZSfz#<[z #zh6=.,7 ^!XU+e+:0 public void run() )I^)*(} { Ul7,k\q@ while(nStartPos < nEndPos && !bStop) Zz{[Al{ { 99=[>Ck)G t>fA!K%{ L2do2_ try{ * <Nk%` URL url = new URL(sURL); U!3uaz' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gt(X!iN] httpConnection.setRequestProperty("User-Agent","NetFox"); >:(6{}b String sProperty = "bytes="+nStartPos+"-"; S8rW'}XJ=H httpConnection.setRequestProperty("RANGE",sProperty); U<#$w{d: Utility.log(sProperty); )L&n)w Y,p2eAss g0[<9.ke InputStream input = httpConnection.getInputStream(); 4'7
v!I9 //logResponseHead(httpConnection); IX > j8z[ +Px<DX+ hvwnG>m\ byte[] b = new byte[1024]; A@fshWrl% int nRead; ?}!gLp while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) D~t"9Z\ { T/X?ZK(T nStartPos += fileAccessI.write(b,0,nRead); 98<bF{#0WM //if(nThreadID == 1) ;+#za?w // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3:z4M9f } y"%iD`{ BdRE*9.0 oqQ? 2k<@ Utility.log("Thread " + nThreadID + " is over!"); j.G.Mx" bDownOver = true; 1GyA QHx, //nPos = fileAccessI.write (b,0,nRead); +A.a~Stt } _tWfb}6;Zb catch(Exception e){e.printStackTrace ();} &,6y(- } \I`=JKYT } s|rZ>SLL 6O[wVaC1u -sGWSC //打印回应的头信息 1' @lg*^9 public void logResponseHead(HttpURLConnection con) AU${0#WV_ { >(1_Dn\ for(int i=1;;i++) F"HI>t)> { cVv4gQD\ String header=con.getHeaderFieldKey(i); nP3;<*T P0 if(header!=null) xSMp[j //responseHeaders.put(header,httpConnection.getHeaderField(header)); :w&)XI34 Utility.log(header+" : "+con.getHeaderField(header)); p.W*j^';Q else olQ8s* break; }G:uzud10 } e*'|iuDrY } <^X'f Rs(CrB/M M&BM,~ public void splitterStop() Q i'WV9ke { p'w"V6k('~ bStop = true; I}]@e^ ~ } ?H86Wbz o-e,
O%q;,w{prW } K
{1ZaEH N@du.d: ~m;MM)_V /* ,B/p1^;. **FileAccess.java BC0c c[x *//文件访问(定位,写) h9OL%n 7m' package NetFox; y:6'&`L import java.io.*; {ALBmSapK" ]38<ly7 _*?"[TYfX public class FileAccessI implements Serializable{ #* /W!UOu 5`{;hFl //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 j?KB8oY`TP RandomAccessFile oSavedFile; ?e|:6a+[f long nPos; 'LLQ[JJ=O "qP^uno MHT,rqG public FileAccessI() throws IOException E["t Ccg { JW.&uV1Z this("",0); (>5VS } /zP)2q^ F@(}=w^(A huD\dmQ:] public FileAccessI(String sName,long nPos) throws IOException 'UG}E@G { n; '~"AG) oSavedFile = new RandomAccessFile(sName,"rw"); _(kwD^x6O{ this.nPos = nPos; =O:ek#Bp oSavedFile.seek(nPos); o/[yA3^ } 8cPf0p: BNoCE! e2o9)=y public synchronized int write(byte[] b,int nStart,int nLen) =|&"/$+s { <UHWy&+z& int n = -1; \ui~n:aWJ try{ 714nUA872 oSavedFile.write(b,nStart,nLen); e^Wv*OD' n = nLen; b|@op>UZ } Ty|c@X catch(IOException e)
#YYvc`9 { Py0i%pZ e.printStackTrace (); jG ;(89QR/ } $
5-2cL \bl,_{z? PL_wa(}y]D return n; w8#>xV^~ } WK)k -A^q 4qcIoO 9@*>$6 } R/xCS.yl} sW3D
(
n G:ngio]G0 /*
%!h+ **SiteInfoBean.java jy|xDQ */ Z4zMa& package NetFox; x(N}^Hu OiEaVPSI; P2RL\`<" public class SiteInfoBean { oOSyOD *G|]5 D)cwttH private String sSiteURL; //Site's URL wTbIS~!gF private String sFilePath; //Saved File's Path {#Cm> @') private String sFileName; //Saved File's Name OWfj<#}t+ private int nSplitter; //Count of Splited Downloading File DOU?e9I2 buyz>ICP \)kAhKtG public SiteInfoBean() .u3W]5M| {//nSplitter的缺省值为5 *0ntx$M-w //default value of nSplitter is 5 HD|)D5wH| this("","","",5); 9Bw5 t@ } X^^ D[U b#j5fEY 6{WT;W>WT: public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) l Nt o9 { L(S. sSiteURL= sURL; L KR,CPz sFilePath = sPath; FEswNB(]* sFileName = sName; ~,7R*71 this.nSplitter = nSpiltter; YZ
P <u/({SZ& "evV/Fg( } K%Ml2V
}CqIKoX. pz =Wq4l public String getSSiteURL() P*sCrGO% { 7s3<} return sSiteURL; VH65=9z } a8$pc>2E r{&"]'/X mq9&To! public void setSSiteURL(String value) ;r}<o?'RM { [} 3Y1t{G sSiteURL = value; a a]v7d } OPjh"Hv 8 EH3zm4 tgnXBWA`! public String getSFilePath() _?<Fc8F { Vd~k4 return sFilePath;
Q)&Ztw< } /9Xf[< FFGTIT# {" z"`?<A&u public void setSFilePath(String value) MLX.MUS { `#U6`[[ sFilePath = value;
7]bqs"t } -XB>&dNl)T H\vO0 <X wS4wED&a public String getSFileName() Kfl+8UR5= { ktRdf6:~ return sFileName; Mk;j"ZDF } i|Wn*~yFOO plAt
+*& d-aF- public void setSFileName(String value) 2$ =HDwv { +/tD$ sFileName = value; _u;
UU$~
} eF@E|kK K9=_}lS@' 1;V5b+b public int getNSplitter() -d]z_
SP@ { oGZ9@Y)(T return nSplitter; K(^x)w r-: } .Pi67Kj, XA68H!I [A47OR public void setNSplitter(int nCount) C
Qebb:y { [nrP;
_ nSplitter = nCount; I$&/?ns@O } 57r)&8 } JQqDUd |j<'[gB\p x$E
l7=. /* \Ip<bbB0 **Utility.java >*MB_m2| */ 5V0=-K package NetFox; c/u;v69r }|d:(* h;6@-\6 public class Utility { ':=C2x1d|
O>3'ylBQ c?d#Bj ? public Utility()
1Sy#* { _rM%N+$&d_ Z7v~;JzC# ?/\;K1c p } DEBgb |Yx8Ez //线程睡眠 <i5^izg public static void sleep(int nSecond) km^AX:r1 { `C1LR,J try{ ch&r. Thread.sleep(nSecond); hug12Cu } `'>>[*06:a catch(Exception e) U;31}'b { P/_XDP./U e.printStackTrace (); cE3co(j } -nW{$&5AF } +0OQ"2^& }LRAe3N%8 //日志 ,%C$~+xjM public static void log(String sMsg) 0\mzGfd { G`n-WP System.err.println(sMsg); ]8^2(^3ct } kK(633s L*_xu _F 8c~H![2u public static void log(int sMsg) oeIS&O.K { 9.R_= System.err.println(sMsg); = FE,G* } IoX(Pa } ~7m+cWC-+ F,D& Eg9502Bl~8 /* lyV]-w **TestMethod.java C{Fo^-3 */ 5xiYCOy package NetFox; L+u_153 GP[$&8\M 8dpVB#]pp, public class TestMethod { acH.L_B: BP7_o63/G :sn}D~ public TestMethod() )KNFS,5 { ///xx/weblogic60b2_win.exe FUH1Z+9 try{ 0QPipuP SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); us]ah~U6A //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Kb}N!<Z* SiteFileFetch fileFetch = new SiteFileFetch(bean); Q.N^1?(>k fileFetch.start(); X2{3I\'Ft } T4UY%E!0 catch(Exception e){e.printStackTrace ();} CkP!4^J qQ N5s_o0K4TU Vf:t!'WD?2 } U3Q'ZT .`iq+i~ Uq&|iB#mF public static void main(String[] args) K)k!`du!6 { 2q#$?qs_b new TestMethod(); B<oi,S } LR^b?.#> } mF_/Rhu 点击下载更多相关资料
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