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/* =]b9X7} **SiteFileFetch.java bl.EIyG> */ B.K4!/cF package NetFox; g1V)$s7 import java.io.*; Qlh?iA import java.net.*; )!,@m>0v{ c&e0OV\m 0;cuX@A/a? public class SiteFileFetch extends Thread { qZbHMTnT6 cL7C2wB` P`
]ps?l SiteInfoBean siteInfoBean = null; //文件信息Bean PbEQkjE long[] nStartPos; //开始位置 +WLD long[] nEndPos; //结束位置 4 Py3I9 FileSplitterFetch[] fileSplitterFetch; //子线程对象 b1)\Zi long nFileLength; //文件长度 }`]]b+_b>@ boolean bFirst = true; //是否第一次取文件 ?O7iK<5N boolean bStop = false; //停止标志 (9'be\ File tmpFile; //文件下载的临时信息 <<<NXsH DataOutputStream output; //输出到文件的输出流 C P&o%Uc* `^%@b SE( //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mu>] 9ZW public SiteFileFetch(SiteInfoBean bean) throws IOException 0_HJ.g! { +7Rt{C, siteInfoBean = bean; 8]]@S"ZM,\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); UM\}aq=, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +wA p,Xr if(tmpFile.exists ()) y#e ?iE@ { |0]YA bFirst = false; U!NI_uk read_nPos(); )Y8qWJU } #G~wE*VR$ else vX 1W@s { nF|Oy0 nStartPos = new long[bean.getNSplitter()]; z L8J`W nEndPos = new long[bean.getNSplitter()]; B
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public void run() wBE7Bv45 { G
~A$jStm //获得文件长度 <OIUyZS //分割文件 EoKo
//实例FileSplitterFetch '(T mV#3 //启动FileSplitterFetch线程 C$t.C
rxx //等待子线程返回
}Zt.*% try{ Yfe'#MKfL if(bFirst) .Nk}Z9L]k { L7<+LA)s0 nFileLength = getFileSize(); !*5_pGe if(nFileLength == -1) PY2[S[ { ^glX1 ) System.err.println("File Length is not known!"); N6WPTUQ1mF } B_!wutV@ else if(nFileLength == -2) 9QC< E| { C/bxfp{? System.err.println("File is not access!");
}\>+H } 3Fgz)*Gu] else eVrnVPkM { 5`{=` for(int i=0;i<nStartPos.length;i++) O/(3 87= U { [;*\P\Xih nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^u3*hl}YKy } (X*'y*: for(int i=0;i<nEndPos.length-1;i++) 8>ESD}( { uL
bp.N8 nEndPos = nStartPos[i+1]; xna7kA } l},dQ4R nEndPos[nEndPos.length-1] = nFileLength; U7jhV,gO4 } 3xP~~j;7 } DQ%`v= 33*^($bE& bAN 10U //启动子线程 0,:iE\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Fs?( UM for(int i=0;i<nStartPos.length;i++) DE5d]3B { aXQ&@BZ{j fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K1/
U
(A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Tc9&mKVE%( nStartPos,nEndPos,i); 6euR'd^Qi Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xT:qe fileSplitterFetch.start(); _MGNKA6JI } 2TE\4j // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K/!/M%GB6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ,;9ak-$8p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", v hRu`Yb nEndPos = " + nFileLength); "w>rlsT<O // fileSplitterFetch[nPos.length-1].start(); 4 U3C~J Y,3z-Pa=@ Ii|uGxEc //等待子线程结束 H~~7~1"x //int count = 0; +G<}JJ'V //是否结束while循环 <9=zP/Q boolean breakWhile = false; J>><o:~@ Q1aHIc
eLCdAr while(!bStop) d^ 2u}^kG { =9kj?
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write_nPos(); rd XCWK$E Utility.sleep(500); Rbx97(wK breakWhile = true; VI(RT-S6 V*~1,6N[ <]Ij(+J; for(int i=0;i<nStartPos.length;i++) &mX5&e { d\v$%0 if(!fileSplitterFetch.bDownOver) 83mlZ1jQz { 6\; 4
4,3 breakWhile = false; D=jSh break; C4&U:y<ju } xnJjCEZ } Dm7Y#)%8 if(breakWhile) 6H(fk1E break; F% F
c+? b=6MFPbg L!CX& //count++;
N BV}4 //if(count>4) B'WCN&N // siteStop(); 1Z^`l6|2 } +)/Rql(lY XNc"kp? z "Y"t2l_n System.err.println("文件下载结束!"); oUW)H } @4 zi]v catch(Exception e){e.printStackTrace ();} w.4u=e >Z4 } AzLbD2Pl tIn7(C Cfv L)f //获得文件长度 {0NsDi>(2 public long getFileSize() c8bca` { QU-7Ch#8 int nFileLength = -1; .ujs`9d_- try{ e5*5.AB6& URL url = new URL(siteInfoBean.getSSiteURL()); m.\ >95! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n/9 LRZD|w httpConnection.setRequestProperty("User-Agent","NetFox"); yj}bY?4I 'Z*\1Ci [
4?cM\_u@ int responseCode=httpConnection.getResponseCode(); Jcwh|w9D8 if(responseCode>=400) }<(
"0jC { w0a+8gexi processErrorCode(responseCode); Bi9
N return -2; //-2 represent access is error C:'WX*W } P?Gd}mdX?m 6=Y3(#Ddt T[Z <bW~0 String sHeader; d&PE,$XC fWtb mUq ZYwBw:y}y for(int i=1;;i++) {#dp-5V { ~6@c]: //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); nvO% //Utility.log(in.readLine()); Lu8%qcC sHeader=httpConnection.getHeaderFieldKey(i); .RQ Xxw
if(sHeader!=null) ;Zx K3/(7 { >\6jb&,%O if(sHeader.equals("Content-Length")) dvg; { fd!pM4"0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {<-
ouD break; ~cO?S2!W } bik] JIM } g[=\KrTSg else {a+Fx}W break; >j(I[_g } z. _C*c } G:h;C].
catch(IOException e){e.printStackTrace ();} I&'S2=s catch(Exception e){e.printStackTrace ();} q_9N+-?{7 >0g`U {L-{Y<fke Utility.log(nFileLength); 4AJu2Hp WQIM2_=M #whO2Mv return nFileLength; i
h`y0(< } gNEzlx8A 3IU$ dFI.`pB //保存下载信息(文件指针位置) y7;XOPm private void write_nPos() m5'__< { k"DQbUy0L try{ o3TBRn, output = new DataOutputStream(new FileOutputStream(tmpFile)); tvj'{W output.writeInt(nStartPos.length); /_zF?5h for(int i=0;i<nStartPos.length;i++) WoClTb>F { N)
V7yo? // output.writeLong(nPos); lvz:UWo output.writeLong(fileSplitterFetch.nStartPos); "b1R5(Ar output.writeLong(fileSplitterFetch.nEndPos); T_oW)G } #/XK&(X output.close(); GH; F3s } *xZQG9`kt catch(IOException e){e.printStackTrace ();} uc"[ qT(X catch(Exception e){e.printStackTrace ();} x%:>Ol } 1CS]~1Yp: .f.j > H,4,~lv| //读取保存的下载信息(文件指针位置) #r:Kg&W2FO private void read_nPos() y?R <g^A { `MpC<sit try{ @=<TA0;LL DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I8-&.RE int nCount = input.readInt(); U*qK*"k nStartPos = new long[nCount]; "` ?Wu nEndPos = new long[nCount]; 'bY|$\I for(int i=0;i<nStartPos.length;i++) 1Z$99 { nE"b` nStartPos = input.readLong(); lA^Kh nEndPos = input.readLong(); <,]CVo } `bt)'ERO%# input.close(); 2G:{ FY } ~cg+BAfu catch(IOException e){e.printStackTrace ();} O,xAu}6f+ catch(Exception e){e.printStackTrace ();} n5,Pq+[ } W!Ct[t Uf]Pd)D o j4)7{ private void processErrorCode(int nErrorCode) ofrlTw&o { vM4`u5 System.err.println("Error Code : " + nErrorCode); sp|y/r# } ~PAbLSL*u v,.n/@s|X 7!yF5+_d //停止文件下载 my\oC^/9 public void siteStop() 3<'Q`H > { fvBC9^3 bStop = true; W2.1xNWO for(int i=0;i<nStartPos.length;i++) !
{o+B^^ fileSplitterFetch.splitterStop(); R^O)fL 0_ jeuNTDjeL bg3jo1J } jvKaxB;e } u$/2XO //负责部分文件的抓取 czsoD)N **FileSplitterFetch.java <.%8j\j( */ om39;nk!} package NetFox; FEi,^V te4"+[ $| _nFvM'`< import java.io.*; |/Q. "d import java.net.*; AA%g^PWpR j<-o{6r ~S{\wL53 public class FileSplitterFetch extends Thread { 9oN'.H^ A(sx5Ynp LUVJ218p String sURL; //File URL (2\ekct ^ long nStartPos; //File Snippet Start Position nPX'E`ut-V long nEndPos; //File Snippet End Position ^p%+r B.j[ int nThreadID; //Thread's ID QS?9&+JM | boolean bDownOver = false; //Downing is over gY^TBR0?m boolean bStop = false; //Stop identical ,ui'^8{gK FileAccessI fileAccessI = null; //File Access interface f!Nc+ {ZI6!zh' =` >Nfa+, public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException s+G9L)b' { t4W0~7 this.sURL = sURL; 3'uES4+r this.nStartPos = nStart; ;8Q?`=a this.nEndPos = nEnd; _BaS\U%1( nThreadID = id; ]`U?<9~Ob fileAccessI = new FileAccessI(sName,nStartPos);//定位 X
\ZUt
> } @9
tvN} 05zdy-Fb 4tu>~ vOE public void run() 0`zq*OQ { yAkN2 while(nStartPos < nEndPos && !bStop) (?wKBUi { K4L#%KUPW NGGd6V%'- UsKn4Kh try{ "Z?":|%7 URL url = new URL(sURL); 4B>|Wft{p] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ttt&sW` httpConnection.setRequestProperty("User-Agent","NetFox"); \:28z String sProperty = "bytes="+nStartPos+"-"; +a@SdWf httpConnection.setRequestProperty("RANGE",sProperty); !t{!. Utility.log(sProperty); \zDV|n~{w ;8kfgpM_ Cagq0-:(p InputStream input = httpConnection.getInputStream(); 7-B'G/PS/ //logResponseHead(httpConnection); %?wE/LU> t$%}*@x7 l'R`XGT byte[] b = new byte[1024]; 'm((G4 int nRead; `N,Jiw;bw while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) DzOJ{dF { (acRYv( nStartPos += fileAccessI.write(b,0,nRead); -^N '18: //if(nThreadID == 1) +g30frg+Gl // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EFO Q;q } ovVU%2o1b P1jkoJ 6?~pjMV Utility.log("Thread " + nThreadID + " is over!"); l)bUHh5[ bDownOver = true; F.hC%Ncu //nPos = fileAccessI.write (b,0,nRead); Dne&YVF9V } ,^T2hY` catch(Exception e){e.printStackTrace ();} 3<lDsb(}0A } Jl}7]cVq# } W5 }zJ)x W`kgYGnFG nQC[[G*x //打印回应的头信息 O^hV<+CX public void logResponseHead(HttpURLConnection con) 0eIR)#j* { KcE=m\ h for(int i=1;;i++) uEY5&wX` { U)6JJv String header=con.getHeaderFieldKey(i); {:cA'6f.b if(header!=null) c0~'5Mlp //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2Ev,dWV Utility.log(header+" : "+con.getHeaderField(header)); xDS9gGr else y uq E break; g;1
UZE; } "tIx$?I } T9 1Iz+j 9`{cX 7[PXZT public void splitterStop() x(Z@R\C-a { 3m'6 cMQ bStop = true; 'AU!xG6OQ } :4dili4|/ LGkKR{ep( Bf.RYLsh6 } 5y)kQ<x" XN Y(@ F&\o1g-L /* [g{}0[ew **FileAccess.java S70ERRk *//文件访问(定位,写) oj/tim package NetFox; BBDOjhik import java.io.*; n\ZFPXP !dGgLU_ 6 B
) public class FileAccessI implements Serializable{ TCYnErqk %+.]>''a //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Sa Nx;xgi RandomAccessFile oSavedFile; B3D4fYQ long nPos; ^a]:GPc .F]6uXd E-/]UH3u H public FileAccessI() throws IOException I5Vp%mCY { oU"!"t this("",0); \7]0vG } ePLpGT /h6K"w=='! ;xqN#mqq public FileAccessI(String sName,long nPos) throws IOException EIdEXAC( { |YEq<wbQ oSavedFile = new RandomAccessFile(sName,"rw"); P]cC2L@Vbi this.nPos = nPos; VCf/EkC oSavedFile.seek(nPos); x#)CH}J } r8%"#<]/ I)]"`2w2w {$AwG#kt public synchronized int write(byte[] b,int nStart,int nLen) XSOSy2: { q#C;iK4 int n = -1; )wqG^yv try{ dQ#$(<v[ oSavedFile.write(b,nStart,nLen); C"7-lz n = nLen; T@H<Fm_ } ngLpiU0H& catch(IOException e) N1!O8"Q|*3 { wa1Qt e.printStackTrace (); H6/n } 9u0<$UY% |&u4Q /0 }z,f8Yz return n; %^KNY ;E } 0]k-0#JM Gov]^?^D- 3q-Xj:FP } nVyV]'-z 1[:tiTG|C Bcl6n@{2f /* ]iezwz`' **SiteInfoBean.java ;s\ck:Xg */ N!lQ;o' package NetFox; .dPy<6E sD=iHO
Am 2 Q}^<^r public class SiteInfoBean { 1| XC$0 :meq4!g{1 ?v,4seRuz private String sSiteURL; //Site's URL pq +~| private String sFilePath; //Saved File's Path / n@by4;W private String sFileName; //Saved File's Name IeT1Jwe private int nSplitter; //Count of Splited Downloading File |C`.m| ]k)h<)nY jI!WE$dt public SiteInfoBean() _1ax6MwX {//nSplitter的缺省值为5 K<E|29t^k //default value of nSplitter is 5 6~ +/cY-V this("","","",5); M0K+Vz= } \O=t5yS (5h+b_eB kWZ/O public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)
%Z-B{I( { p<8Ga.kiN sSiteURL= sURL; 9jf2b sFilePath = sPath; :O9i:Xq[QW sFileName = sName; -p*j9
z this.nSplitter = nSpiltter; bM>5=Zox dkAY%z two glUf.:] } &O\$=&, h #xNXCBl]O nO;t5d public String getSSiteURL() EZ)$lw/!J { EF8'ycJk+ return sSiteURL; ZnZ`/zNO } ~ L?q.*q cIOM}/gqv Rdl^-\BV public void setSSiteURL(String value) v~KgCLo { K!qV82b='{ sSiteURL = value; R}0xWPt9G } VjGtEIew H q."_i{I +ieRpVg public String getSFilePath() &? z6f9*$ { lQl return sFilePath; dZ{yNh.] } b Fwc > f{ER]U u
4$$0 ` public void setSFilePath(String value) 3fhlMOm { >?)Df(n(9 sFilePath = value; =N<Z@'c } 1%k$9[!l% B^lm'/,@ C?fa-i0l^ public String getSFileName() 65AG#O5R { (@ixV$Y return sFileName; v|#}LQZ } ^gd[U C-"w &C6Z{.3V d'*:2;)g^ public void setSFileName(String value) wC>Xu.Z: { !)+8:8H' sFileName = value; 9vw0box } > ?<C+ZHh >Qold7
M ;nZN}&m
public int getNSplitter() W=ar&O~}n { AD4Ot5 return nSplitter; T Z_](% } < (<IRCR XfYhLE fFNwmH-jv public void setNSplitter(int nCount) 7<7
/NZ<I { 3lT>C'qq nSplitter = nCount; iR6w) } k-XE|v } zcE[wM U6
$)e.FO P/;d|M( /* |)+;d **Utility.java jk-e/C */ Yk!TQY4 package NetFox; Z+]Uw & U6 bOH%P 60@]^g;$I public class Utility { xv:VW< 0Z<&M|G $2lPUQZ<5 public Utility() LH]<+Zren { QM'Db`B E"[h20`\/ @$ggPrs } "Acc]CqH* NsY D~n //线程睡眠 h(1o!$EU2 public static void sleep(int nSecond) Od5I:p]N { qTD^Vz
V try{ Z<^TO1xs9B Thread.sleep(nSecond); AQ`
`Dp } klwNeGF]N catch(Exception e) jt? .g' { "0edk"hk e.printStackTrace (); z6+D=< } L/sMAB } H:jx_ >*FH JCe //日志 h.ln%6:d public static void log(String sMsg) eG05} { zIE{U System.err.println(sMsg); K,'v{wSr } ]`, jaD /-v6jiM . \6q\7Ej public static void log(int sMsg) mIy|]e`SJ { ~ WO System.err.println(sMsg); <g4[p^A } j[e<CGZ } {Jx-Zo>' W3.(s~)o N">4I) /* p6Ie ?Gg **TestMethod.java , A@uSfC( */ &uMx*TTY package NetFox; yJRqX]MLA tzn+
M0' :kb2v1{\ public class TestMethod { Pn| ;VCh 1](PuQm7+ rTmVHt public TestMethod() XGCjB{IV { ///xx/weblogic60b2_win.exe
'K7m!y try{ )d$FFTH SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Ua2wa A //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); *+|,rcI SiteFileFetch fileFetch = new SiteFileFetch(bean); jo}yeGbU fileFetch.start(); |mp~d<& } !+(c/ gwBh catch(Exception e){e.printStackTrace ();}
BV-(`#~:y T?+%3z}8 uG){0%nX } KKcajN lh`ZEvt ][TA7pDPV public static void main(String[] args) &ra2(S45 { r>;(\_@ new TestMethod(); vi;yT. } vKFEA7 } "969F(S$ 点击下载更多相关资料
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