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/* %nE%^Enw **SiteFileFetch.java a40>_;}:x */ :Z_abKt package NetFox; |z&7KoYK' import java.io.*; q|IU+r:! 3 import java.net.*; RzFxO BQeg-M LfK/wSvWw public class SiteFileFetch extends Thread { =^l`c$G< $(08!U
8YgRJQZ! SiteInfoBean siteInfoBean = null; //文件信息Bean ?P#\CW long[] nStartPos; //开始位置 aD6!x3c/ long[] nEndPos; //结束位置 wyAh%'V FileSplitterFetch[] fileSplitterFetch; //子线程对象 Qv;b$by3 long nFileLength; //文件长度 ~DB:/VSmu boolean bFirst = true; //是否第一次取文件 3/(eK%d4Xb boolean bStop = false; //停止标志 jZvIqR/ File tmpFile; //文件下载的临时信息 U2~|AkL DataOutputStream output; //输出到文件的输出流 zzh7 "M3Qn %\)AT" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~XvMiWuo public SiteFileFetch(SiteInfoBean bean) throws IOException A 2\3.3 { :b_hF siteInfoBean = bean; 9VIAOky- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3RcnoXX_ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); km`";gUp> if(tmpFile.exists ()) *7#5pT~ { ~(`MP< bFirst = false; Imyw-8/; read_nPos(); )]E?~ $, } lYr4gFOs else E(f|LG[I { [p(0g;bx nStartPos = new long[bean.getNSplitter()]; \Il?$Kb/ nEndPos = new long[bean.getNSplitter()]; ~4] J'E > } }wJH@'0+ -KG1"g,2 A,7* 52U tZ*>S]qD } ,XN4Iy#BZl 1&Mpx!K*T whGtVx|zR public void run() zcio\P=^|B { %.fwNS //获得文件长度 ^.*zBrFx //分割文件 'I>geW?{QK //实例FileSplitterFetch KR%NgV+}!0 //启动FileSplitterFetch线程 GK3cQw //等待子线程返回 ZK<c(,oZ^ try{ i@%a!].I if(bFirst) bJeF1LjS { KsqS{VVCh nFileLength = getFileSize(); ItZ*$I1< if(nFileLength == -1) k?
,/om1 { ?-<>he System.err.println("File Length is not known!"); f/m0,EERk } %"|W
qxv else if(nFileLength == -2) j|[ >f { Q Vl"l'e8 System.err.println("File is not access!"); LF+E5{=:R } )t2 eg1a: else 3XncEdy_ { n9Vr*RKM) for(int i=0;i<nStartPos.length;i++) Pv*]AF;9pQ { ]v+yeGIK S nStartPos = (long)(i*(nFileLength/nStartPos.length)); ke2M&TV } P\@efq@! for(int i=0;i<nEndPos.length-1;i++) {CX06BP { dChMjaix nEndPos = nStartPos[i+1]; AMK(-= } {.Brh"yC nEndPos[nEndPos.length-1] = nFileLength; 74c5\UxA } on1B~?*D } $Xs`'>," Q+O./1x*, e`K{ //启动子线程 |!CAxE0d$B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .
\8"f]~ for(int i=0;i<nStartPos.length;i++) O]oH}#5b { *De'4r 2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ezS@`_pR; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), s'BlFB n nStartPos,nEndPos,i); 1=PTiDMJ<* Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5!Ovd
O}g fileSplitterFetch.start(); h&rZR`g } `(E$-m-~jH // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [*
|+ it+! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 4v9d&
m!< // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", O0eM*~zI nEndPos = " + nFileLength); O.jCDAP // fileSplitterFetch[nPos.length-1].start(); eAjsMED s?
2ikJq {TDZDH //等待子线程结束 gSe3S-Lt //int count = 0; *n6L3"cO //是否结束while循环 MHA_b^7? boolean breakWhile = false; HumL(S'm FbXur- et^ gJ^taUE while(!bStop) 0g#x QzE { fm!\**Q1 write_nPos(); U.Y7]#P: Utility.sleep(500); 2WE01D9O breakWhile = true; e`Co =' m>*~tP IsDwa qd| for(int i=0;i<nStartPos.length;i++) 5<P6PHdY { 5=8t<v1Bn if(!fileSplitterFetch.bDownOver) yI^7sf7k { yq[@Cw breakWhile = false; i1*0'x break; JEF ;Q } ux6p2Sk;K } ` $q0fTz if(breakWhile) +=sw&DH break; nYe:$t3F= 6h0}ZM I1I-,~hO //count++; RE1M4UV. //if(count>4) L~RFI&b
// siteStop();
unKgOvtj } ~wO-Hgd u'T-}95 V l=x(
System.err.println("文件下载结束!"); ae](=OQ } G,<l}(tEG catch(Exception e){e.printStackTrace ();} U+C^"[B } Y?L>KiM$ vKfjP_0$ hDQk zqW //获得文件长度 k|{ 4"4r public long getFileSize() }6=?
zs} { zg$ag4%Qgg int nFileLength = -1; ]wi0qc2{ try{ N(2M
w:} URL url = new URL(siteInfoBean.getSSiteURL()); c _!!DEe7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (/s~L*gF{ httpConnection.setRequestProperty("User-Agent","NetFox"); &I%E8E `6;$Z)=. L\t_zf_0 int responseCode=httpConnection.getResponseCode(); i%,
't if(responseCode>=400) w'E?L`c { R1eWPtWs processErrorCode(responseCode); XVJH>Zw return -2; //-2 represent access is error hljKBx~ } Hsd76z#8 B^/k`h6J S_ UAz String sHeader; pM}~/ f1;@a>X
*)Cr1d k for(int i=1;;i++)
[;4;.V { <XtE|LG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); z(EpJK=`_ //Utility.log(in.readLine()); s`0IyQXVU sHeader=httpConnection.getHeaderFieldKey(i); pOh<I{r1 if(sHeader!=null) &`m$Zzl;
{ gS@<sO$d> if(sHeader.equals("Content-Length")) gVI`&W__, { ~(7ct*U~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P}qpy\/(4 break; </1]eDnU } =N8_S$nx( } WglpWp) else >EZZEd break; iz{TSU } E@n~ @|10 } p>#q* eU5 catch(IOException e){e.printStackTrace ();} >d
*`K catch(Exception e){e.printStackTrace ();} 57 Bx- 1uCF9P
ai /wl]kGF Utility.log(nFileLength); Bq1}"092 I|qhj*_C Q\T?t return nFileLength; R!lug;u# } nc\2A>f` }P-C-L{yE( :FfEjNil //保存下载信息(文件指针位置) C/#pK2xY private void write_nPos() )fxn bBz{ { S' kgpF"bm try{ 0NKgtH~+ output = new DataOutputStream(new FileOutputStream(tmpFile)); Zq<j}vVJ output.writeInt(nStartPos.length); @rDBK] V for(int i=0;i<nStartPos.length;i++) G%;>_E { 5]upfC6 // output.writeLong(nPos); C"B'Dj output.writeLong(fileSplitterFetch.nStartPos); tHHJ|4C output.writeLong(fileSplitterFetch.nEndPos); o 9/,@Ri\5 } oP%5ymL%J output.close(); #D|%r-:" } :]]x^wony~ catch(IOException e){e.printStackTrace ();} UnP<`z# catch(Exception e){e.printStackTrace ();} *hJWuMfY, } HLG5SS7 8ih_S2Cd 9__B!vw: //读取保存的下载信息(文件指针位置) $/tj<++W private void read_nPos() sgGA0af { e&U$;sS` try{ ipg`8*My DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [ }Tb2| int nCount = input.readInt(); doHE]gC2Uz nStartPos = new long[nCount]; ge.>#1f} nEndPos = new long[nCount]; la w$LL for(int i=0;i<nStartPos.length;i++) bhIShk[ { {wj%WSQj/y nStartPos = input.readLong(); *<y9.\zY< nEndPos = input.readLong(); oH?:(S( } v[{7\Hha input.close(); Xq03o#-p+ } oy5K*
} catch(IOException e){e.printStackTrace ();} oe2*$\?. catch(Exception e){e.printStackTrace ();} ;-@: }/ } ;nQ=!
.#Q s(5hFuyg &Tuj`DL private void processErrorCode(int nErrorCode) :{iH(ae; { a^@.C5 System.err.println("Error Code : " + nErrorCode); N>"L2E=z$| } Fpn*]x ![\P/1p yq[/9Pci A //停止文件下载 ?O#,{ZZf= public void siteStop() 0#eb] c { H1B%}G*Ir- bStop = true; .R"VLE| for(int i=0;i<nStartPos.length;i++) zEtsMU fileSplitterFetch.splitterStop(); %aMC[i -d#08\ La9}JvQoX } 2p\xgAW? } OObAn^bt //负责部分文件的抓取 uGb+ *tD **FileSplitterFetch.java ."^\1N(.n */ %sOY:>
package NetFox; g`S;xs `vAcCahM ?{aJ#w import java.io.*; 1uj~/M import java.net.*; >4Tk#+%Jj WA43}CyAe cxSHSv1; public class FileSplitterFetch extends Thread { y,|2hrj/0E y-nv#Ejr 0 {z8pNrc String sURL; //File URL gFHBIN;u long nStartPos; //File Snippet Start Position U!r8}@ long nEndPos; //File Snippet End Position v"ORn5 int nThreadID; //Thread's ID N WF h<
boolean bDownOver = false; //Downing is over X5/fy"g& boolean bStop = false; //Stop identical UH%H9;
,$] FileAccessI fileAccessI = null; //File Access interface i56Rdb 'vVWUK956 Oj _]` public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Os$E,4,py { {!wW,3|Pu this.sURL = sURL; EF\OM?R this.nStartPos = nStart; C/Z#NP~ * this.nEndPos = nEnd; s) U1U6O nThreadID = id; wods fileAccessI = new FileAccessI(sName,nStartPos);//定位 nfHjIYid } YFJaf"?8g ^`id/ <Qih&P9;> public void run() n5UUoBv { Lr:n while(nStartPos < nEndPos && !bStop) Ya\:C] { 0>SA90Q ( `bb1gz Sxc)~y try{ T})q/oUqK URL url = new URL(sURL); uCB9;+ Hjw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {v]L|e%{ httpConnection.setRequestProperty("User-Agent","NetFox"); >YWK"~|i~ String sProperty = "bytes="+nStartPos+"-"; o"BED!/ httpConnection.setRequestProperty("RANGE",sProperty); _`;KmD&5 Utility.log(sProperty); m0ra o[_,r]%+D i4i9EvWp InputStream input = httpConnection.getInputStream(); "i#g [x //logResponseHead(httpConnection); & tT6.@kH K1J |\!o zCo$YP#5_ byte[] b = new byte[1024]; vFdI?(c- int nRead; iZfZF while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 1T|")D { ,v}) nStartPos += fileAccessI.write(b,0,nRead); 4w ,L //if(nThreadID == 1) G) KI{D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Yh1nXkA!V } 2! ,ndLA *Oy*
\cX2[ aQL0Sj:, Utility.log("Thread " + nThreadID + " is over!"); Yz0fOX bDownOver = true; z4BU}`;b3t //nPos = fileAccessI.write (b,0,nRead); D`^wj FF } s(Gs?6}>T catch(Exception e){e.printStackTrace ();} 5`fUR/|[ } bR"4:b>K } -JEPh!oTt PZ6R+n8 f4.jWBF //打印回应的头信息 wg0_J<y] public void logResponseHead(HttpURLConnection con) Ey:?! { .-HM{6J for(int i=1;;i++) !Ltx2CB2] { AcnY6:3Y| String header=con.getHeaderFieldKey(i); z{Yfiv\-r if(header!=null) v=G*K11@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); L3oL>r'| Utility.log(header+" : "+con.getHeaderField(header)); >2>/
q? else h@O\j&# break; x f{`uHa8 }
tM\BO0 } }U'9 d#N g#74c'+ 6 M:?W" public void splitterStop() OHAU@*[lM { 9teP4H}m bStop = true; FYFlh^} } a_+3, fP DRRQ]eK0 2 ^"j]g>mj } 1qAE)8ie |)>+&
xk M .6BFC /* R%n*wGi_6b **FileAccess.java c0e[vrP: *//文件访问(定位,写) ;|XX^ package NetFox; qm/>\4eLt import java.io.*; UZFs]z!,k }XUI1H]jk ]m`:T public class FileAccessI implements Serializable{ ^NX;zc e%ro7~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 pFMjfWD,C RandomAccessFile oSavedFile; 0OG
3#pE long nPos; 40
u
tmC a.UYBRP/l v9@_DlV\ public FileAccessI() throws IOException I*f@^( { sbVEA this("",0); pLF,rOb } k1g-%DB !jB}}&Ii aUa+]H[ public FileAccessI(String sName,long nPos) throws IOException QPp31o.!5 { "h1ek*(?< oSavedFile = new RandomAccessFile(sName,"rw"); ~~&Bp_9QXN this.nPos = nPos; b-VQn5W oSavedFile.seek(nPos); X7K{P_5l } E[ -yfP~[ {G3Ok++hc CTg79
ITYk public synchronized int write(byte[] b,int nStart,int nLen) %/\sn<6C} { }+`,AC`RM int n = -1; yMkR)HY try{ gGCr~.5 oSavedFile.write(b,nStart,nLen); #sF#<nHZ n = nLen; .#tA .%
} EGv]K| catch(IOException e) < <0[PJ { f$}g'r zl e.printStackTrace ();
mPPB"uQ } 3:$@DZT$ m7A3i<6p P^Og(F8; return n; sng6U;Z } z\,
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+#2~S } vP'!&} h0 %M+g }YC=q /* 753gcY#i **SiteInfoBean.java 4R01QSbd */ 9.~_swkv package NetFox; uJ1oo| sn XF3lS#pt .;bU["fn) public class SiteInfoBean { })mD{c/ d{WOO)j tmoclK- private String sSiteURL; //Site's URL 3S>rc0]6 private String sFilePath; //Saved File's Path cF9ZnT. private String sFileName; //Saved File's Name (Cti,g~ private int nSplitter; //Count of Splited Downloading File a|dgK+[ h{~GzrL* Q0ezeo public SiteInfoBean() z+0#H39 & {//nSplitter的缺省值为5 \:JY[s/ //default value of nSplitter is 5 ]d|M@v~c4 this("","","",5); @YS,)U)4S } \\oa[nvL~ SBi4i;qD JNvgUb'U public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 51AA,"2[_ { >*l2]3'` sSiteURL= sURL; G%jV}7h sFilePath = sPath; >N~jlr | sFileName = sName; "6%qi qt this.nSplitter = nSpiltter; ^s=F<_{ h,fahbH- 3][
} kMa|V0 %N7G>_+ OMjx,@9 public String getSSiteURL() ^d9o \ { 6k7x7z return sSiteURL; 3)^2X } .b2%n;_>. ,>pv>)u{ `+ Mva public void setSSiteURL(String value) eNFA.*p< { =k!F`H`/%' sSiteURL = value; $z@nT.x5 } ?U*s H2F ; ?,'jI*1 `V[ hE
r| public String getSFilePath() +sd':vE { Tkh?F5l return sFilePath; kRiZ6mn } $yFR{_] p|)j{nc . Eb=KG public void setSFilePath(String value) fAT
M? { o107. s sFilePath = value; 8PRB_ny } *+ O uKT\\1Jrq V#DNcF~v]f public String getSFileName() yyjgPbLN= { Op iVQr: return sFileName; W%#LHluP } UzkX;UA hl+
T E{B40E~4 public void setSFileName(String value) oJ0
#U { wH qbTA sFileName = value; X5P1wxk' } #X<s_.7DJ
1FRpcE m\|ie8 public int getNSplitter() OFw93UJ Y { L?hWH0^3 return nSplitter; &?SU3@3| } @p7*JLO Io)@u~yz ,09d"7`X
public void setNSplitter(int nCount) n{.SNipU { t=r*/DxX= nSplitter = nCount; -Wl79lE } &28%~&L } nx`I9j\ ->U9u lTC Gn?<~8a /* B#x.4~YX **Utility.java }tH6E */ q*K.e5"' package NetFox; ns !Mqcm kT4Tb%7KM VH$hQPP5d public class Utility { 3R$*G8v s4{ >7`N2 8 gzf$Oc public Utility() U>kL|X3 V { co%-d +d,Z_ 6F Ln5g"g8gb% } $2gZpO| Q96^rjY //线程睡眠 {Zy)p%j8 public static void sleep(int nSecond) dgM@|&9*m { o@tc try{ Q !G^CG Thread.sleep(nSecond); ,[<+7 } $[DSe~ catch(Exception e) %.VFj7J { ?mJ&zf|B8 e.printStackTrace (); H^C$2 f } j?y_ H[Z } rRzc"W}K+ K/ 5U;oC //日志 Sn!5/9Y public static void log(String sMsg) l's*HExR { YPNG9^Y System.err.println(sMsg); Pmj%QhOYE } Y('?Z] A
2Rp j0+l-]F- public static void log(int sMsg) hO] vy>i; { M"Q{lR System.err.println(sMsg); 3r-oZ8/n } #9ZHt5T=$ } @X g5E K)[DA*W GPs// /* w=feXA3-S **TestMethod.java ;"Q.c#pA$g */ ::R5F4 package NetFox; nBJ'ak hWD%_"yhd >JckN4v public class TestMethod { [h[@?8vB !}PZCbDhL b:t|9FE% public TestMethod() ]L{diD2G { ///xx/weblogic60b2_win.exe *9O@DF&*6 try{ PEDV9u[A SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6Mh"{N7 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 7w51UmO SiteFileFetch fileFetch = new SiteFileFetch(bean); KIXp+Z fileFetch.start(); :^H2D=z@ } _`.Wib+ catch(Exception e){e.printStackTrace ();} -"uOh,G} ~KP@wD~ 6%L#FSI } yB2}[1 (j?ckah%V 7tQ?av public static void main(String[] args) wU(!fw\ { <\`qRz0/ new TestMethod(); zw[ #B # } Lq2ZgKd! } ZgA+$}U)uW 点击下载更多相关资料
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