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/* "Zhh>cz **SiteFileFetch.java ],0I`!\ */ L5 Cfa- package NetFox; BWxJ1ENM
import java.io.*; q x1Js3% import java.net.*; EG qu-WBS X9|*`h < N[3Y~HX!q public class SiteFileFetch extends Thread { beikzuC 2;"vF9WMm lMu9Dp SiteInfoBean siteInfoBean = null; //文件信息Bean ~<<32t'S: long[] nStartPos; //开始位置 N atC}k long[] nEndPos; //结束位置 4(P<'FK $ FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~A5NseWCK long nFileLength; //文件长度 o96c`a u boolean bFirst = true; //是否第一次取文件 z(Uz<*h8 boolean bStop = false; //停止标志 /cx'(AT File tmpFile; //文件下载的临时信息 cq?,v?m DataOutputStream output; //输出到文件的输出流 `3ha~+Goo! d2i?FT> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) w=(dJ(7gu public SiteFileFetch(SiteInfoBean bean) throws IOException 0_ST2I"Ln { K<::M3eQ siteInfoBean = bean; Uaux0W //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zE1=P/N tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); BaI-ve if(tmpFile.exists ()) Hs8JJGXWB { J`0dF<<{[y bFirst = false; :TP4f
?FA read_nPos(); hM!g6\ w } 6l2O>V else [^}bc-9?i { 9v;[T%% nStartPos = new long[bean.getNSplitter()]; Q~ Ad{yC nEndPos = new long[bean.getNSplitter()]; )K]p^lO } >6&Rytcc] YU6|/
<8 cE`qfz CfS;F } VhLfSN>W BjPU@rS.U zi`q([ public void run() 2^`k6V! { ndDF(qHr //获得文件长度 0Cf'\2
//分割文件 ^Tj{}<yT //实例FileSplitterFetch O86p]Lr //启动FileSplitterFetch线程 G?b*e|@S //等待子线程返回 .
4RU'9M try{ _]ZlGq!L if(bFirst) ztHx)
! { YR/I<m`]} nFileLength = getFileSize(); f$5pp=s: n if(nFileLength == -1) _}JMBIq$ { JQej$=* System.err.println("File Length is not known!"); AZik:C"Q } P~lU`.X} else if(nFileLength == -2) *fj]L?, { F/LMk8RgR System.err.println("File is not access!"); -~JYfj@ } b|E ZD3y else $.w$x1 { 3Ur_?PM+C for(int i=0;i<nStartPos.length;i++) [r Nd7-j < { noz1W ] nStartPos = (long)(i*(nFileLength/nStartPos.length)); cl4_M{~ } .)WEg|D0Ku for(int i=0;i<nEndPos.length-1;i++) s~>1TxJe { -O1$jBQS nEndPos = nStartPos[i+1]; t\YM Hq<Y } b+arnKo1fk nEndPos[nEndPos.length-1] = nFileLength; %;u"2L0@ } L[nDjQn" } CSW+UaE 0,@^<G8? ?tqJkL# //启动子线程 S#y GqN0i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; [.Fq
l+ for(int i=0;i<nStartPos.length;i++) W)T'?b'. { D{y7[#$h$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Eld[z{n" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #+U1QOsz nStartPos,nEndPos,i); gE^pOn Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); a(?)r[= fileSplitterFetch.start(); Wuk8&P3 } / bH2Z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W4k$m2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); t18j2P>` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Os9EMU$ nEndPos = " + nFileLength); /~;!Ew|q // fileSplitterFetch[nPos.length-1].start(); 'PFjZGaKR -K8F$\W r1vS~
4Z //等待子线程结束 ns\I Y<Yo //int count = 0; H7Z`a QC //是否结束while循环 |7A}LA boolean breakWhile = false; $$o( m`q&[: -}!mi V while(!bStop) kFmtE
dhsc { LA2/<: write_nPos(); P,-5af*; Utility.sleep(500); BV7P_!vt breakWhile = true; cqs.[0 z#B NR8`nc1~ YtWw)IK for(int i=0;i<nStartPos.length;i++) a:HN#P)12 { <pHm=q/U if(!fileSplitterFetch.bDownOver) aL90:,V { GGcODjY> breakWhile = false; b30Jr2[ break; $)9|"q6 } +0Q +0: } 7(tsmP if(breakWhile) Nz`v+sp break; |Z2"pV A4#FAFy zG 9D
Ph //count++; Y[}A4` //if(count>4) n9J{f"`m // siteStop(); +5Dc5Bl } tQNrDp+ 3^y<Db 3Os0<1@H System.err.println("文件下载结束!"); ['pO=ho } 2;:p
H3 catch(Exception e){e.printStackTrace ();} 4Nt4(3Kf } dlCYdwP [Eu)~J* ZxT
E(BQv //获得文件长度 X~"p]V_ public long getFileSize() vS0 ii { R0tT4V+ int nFileLength = -1; Ny$3$5/ try{ ?#Z4Dg
9| URL url = new URL(siteInfoBean.getSSiteURL()); >8OY6wb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); u)o-H!a httpConnection.setRequestProperty("User-Agent","NetFox"); MO7R3PP D^.
c: T7.SjR6X> int responseCode=httpConnection.getResponseCode(); *xsBFCRU if(responseCode>=400) zixG}' { m26YAcip} processErrorCode(responseCode); ~v pIy - return -2; //-2 represent access is error \'Et)uD* } 3Xd:LDZ{ <y^_&9 FibZT1-k String sHeader; -40X3 $,, PF/N8c >JS^yVk for(int i=1;;i++) ^4"AWps { P,'%$DLDg //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *.|%uf. //Utility.log(in.readLine()); C]5 kQ1Og sHeader=httpConnection.getHeaderFieldKey(i); 1@KiP`DA if(sHeader!=null) -XCs?@8EQ { \DZ.#=d if(sHeader.equals("Content-Length")) SKnYeT { `{Q'iydU nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); hPBBXj/= break; 8t*sp-cy| } 3lpxh_ } llX ` else q: FhuOP break; X]@"ZV[ } Po@;PR= } |w{Qwf!2 catch(IOException e){e.printStackTrace ();} U[?_|=~7 catch(Exception e){e.printStackTrace ();} +@3+WD 5{V"!M+< 1r$-U h Utility.log(nFileLength); TQ4L~8 I)FFh%m<}a ~r8<|$; return nFileLength; =#W:z.w } {E Ay~lo 7mMGH( (wZ!OLY%} //保存下载信息(文件指针位置) z6E =%-` private void write_nPos() 4mo/MK&M: { mXyP;k try{ [q[37;ZEQ output = new DataOutputStream(new FileOutputStream(tmpFile)); ; o_0~l=-/ output.writeInt(nStartPos.length); 0!dNW,NfJ for(int i=0;i<nStartPos.length;i++) #'s$6gT= { TxG@#" ^g} // output.writeLong(nPos); [//i "Nm output.writeLong(fileSplitterFetch.nStartPos); wX]$xZ!s output.writeLong(fileSplitterFetch.nEndPos); *%KIq/V } "E2 0Y"[h output.close(); lY
tt|J } zG ='U catch(IOException e){e.printStackTrace ();} {HEWU<5 catch(Exception e){e.printStackTrace ();} 8~C}0H } xE<H@@w d[3me{Rs gE\ ^ vaB //读取保存的下载信息(文件指针位置) %BkE %ZcZ private void read_nPos() C+s/KA% { a`w=0]1&* try{ (?1$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9#:nlu9 int nCount = input.readInt(); 2w7$"N nStartPos = new long[nCount]; Zio!j%G nEndPos = new long[nCount]; *Sj)9mp for(int i=0;i<nStartPos.length;i++) NzQvciJ@" { q%;cu1^"M nStartPos = input.readLong(); ^vd$j-kjTP nEndPos = input.readLong(); W$hCI)m( } ~q566k!Ll! input.close(); PkDt-]G. } @9 S :: catch(IOException e){e.printStackTrace ();} #0<pRDXj catch(Exception e){e.printStackTrace ();} C<^i`[&P$ } &EV%g6 c2g[w;0" {k.:DH) private void processErrorCode(int nErrorCode) x!GDS> { aF?_V!#cT System.err.println("Error Code : " + nErrorCode); PM84Z@Y } IwnDG;+Ap lF(v<drkB :.g/=Q(T~ //停止文件下载 y{mt *VA4 public void siteStop() e#HPU { tjtvO@?1- bStop = true; ?Sh]kJO for(int i=0;i<nStartPos.length;i++) |"LHo
H fileSplitterFetch.splitterStop(); g]&fyB# G]aey>) a%`Yz"<lQ } ++,I`x+p } 1r>]XhRFZ //负责部分文件的抓取 |k6+-
1~_ **FileSplitterFetch.java p)B/(% */ QO;Dyef7b package NetFox; 1<m`38' (k!7`<k!Y GZaB z#U import java.io.*; WZ?>F import java.net.*; JR`$t~0t %_s)Gw&sq 0a:oC(Ak
public class FileSplitterFetch extends Thread { B;[ .u>f <1I4JPh>x c9 EtUv~ String sURL; //File URL #w|v.35%? long nStartPos; //File Snippet Start Position ?QffSSj[s long nEndPos; //File Snippet End Position K.QSt int nThreadID; //Thread's ID hGD@v{/ boolean bDownOver = false; //Downing is over _(J#RH boolean bStop = false; //Stop identical k vZ w4Pk FileAccessI fileAccessI = null; //File Access interface [#Apd1S_ eV}" L:bgJ npzp/mcIe) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException h'em?fN( { =At" Q6-O this.sURL = sURL; tm5{h{AM this.nStartPos = nStart; A^).i_ this.nEndPos = nEnd; !aUYidd nThreadID = id; L<=Dl fileAccessI = new FileAccessI(sName,nStartPos);//定位 =_BHpgL } l9uocP:D B0|W b%MZfaU public void run() O'(Us!aq { DcBAncsK while(nStartPos < nEndPos && !bStop) ^X{U7?x { ?l%4
P5 MuMq%uDA" =| T ^)J try{ z<9C- URL url = new URL(sURL); &1<[@:; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M>5OC)E httpConnection.setRequestProperty("User-Agent","NetFox"); "|I.j) String sProperty = "bytes="+nStartPos+"-"; Y _`JS; httpConnection.setRequestProperty("RANGE",sProperty); rkji#\_-FV Utility.log(sProperty); 3m75mny '6vo#D9M v3cMPN InputStream input = httpConnection.getInputStream(); O EaL2T //logResponseHead(httpConnection); D+:s{IcL< ./;uhj #z >I =gl byte[] b = new byte[1024]; =&08s(A int nRead; b?OA |JqX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >6yQuB { py7Zh%k nStartPos += fileAccessI.write(b,0,nRead); IrZ\;!NK //if(nThreadID == 1) s9"X.-! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [err$ } ]/Nt xdbzpU
9d|8c >
I Utility.log("Thread " + nThreadID + " is over!"); v`QDms,{ bDownOver = true; [;IE Z/ZX //nPos = fileAccessI.write (b,0,nRead); dakHH@Q } {+#{Cha catch(Exception e){e.printStackTrace ();} VD&wO'U } 2?%4|@*H? } ?bM%#x{e T8\@CV! !m:WoQ/ //打印回应的头信息 p5E
okh public void logResponseHead(HttpURLConnection con) ;6R9k]5P% { #2i$:c~ for(int i=1;;i++) XdThl { 7r?,wM String header=con.getHeaderFieldKey(i); VRY(@# q if(header!=null) |sr\SCx //responseHeaders.put(header,httpConnection.getHeaderField(header)); 5@1h^wv Utility.log(header+" : "+con.getHeaderField(header)); jt}oq%Bf else 5'f_~>1Wt break; } 'xGip@W } X\!q8KEpR& } [sG`D-\P[ $:5h5Y#z D3aX\ NGP public void splitterStop() 16eP7s { uq9mq" bStop = true; j%3$ytf|p } `f}ZAX OQ2G2>p fhZwYx&t } =>PX~/o p&Nav,9x {BM:c$3@j /* n1|]ji[c **FileAccess.java #]+BIr` *//文件访问(定位,写) hb~d4J=S package NetFox; "?k'S{; import java.io.*; ,[p?u']yZz NM9ViYm>P yD3vq}U! public class FileAccessI implements Serializable{ YdvXp/P:| anz7ae&P'K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Kc
r)W RandomAccessFile oSavedFile; W'k&DKhTqF long nPos; 1G`5FU as3uz UE_>@_T public FileAccessI() throws IOException k(>J?\iNW { !#]kzS0 this("",0); V^qBbk%l>D } w0js_P-uv E.$//P n|1 y'f-4E< public FileAccessI(String sName,long nPos) throws IOException i)@vHh82 { i-0AcN./p oSavedFile = new RandomAccessFile(sName,"rw"); \K9Y@jnr this.nPos = nPos; gDfM} 2]/ oSavedFile.seek(nPos); /Y\q&} } ,trh)ZZYW| z&GGa`T" vA*NJ%&` public synchronized int write(byte[] b,int nStart,int nLen) S#+ _HFUK{ { gcX int n = -1; +f]I7e:qp try{ ,V4pFQzL oSavedFile.write(b,nStart,nLen); .
VI
# n = nLen; &n6
|L8 } =|- xj h catch(IOException e) Z#%77!3 {
&@7|_60 e.printStackTrace (); `~=Is.V[ } ?K}KSJ6_ wL0"1Ya ~;I{d7z,; return n; A]V<K[9:b } H<b4B$/ SR)@'-Wd 5o(=?dXm4 } NX+
eig</- m}
=<@b:l H~*[v" /* ^T@-yys **SiteInfoBean.java ?~Vev D */ HoM8V"8B package NetFox; M[T!AO-S$ P|)SXR n_] OYG>U public class SiteInfoBean { 0$nJd_gW_ 1hp@.Fv `+@%l*TQ private String sSiteURL; //Site's URL ]zK} X! private String sFilePath; //Saved File's Path wY}+d0Ch private String sFileName; //Saved File's Name .~8IW,[ private int nSplitter; //Count of Splited Downloading File 3?/} 1-gX=8]] ~yf 5$~Z public SiteInfoBean() EA>$t\z {//nSplitter的缺省值为5 <~8W>Y\m //default value of nSplitter is 5 }#u}{ this("","","",5); X!_OOfueP8 } bm7$D Kp# ]X _& khu,P[3> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) AAl`bhx'n { ~d5{Q?T) sSiteURL= sURL; cRfX sFilePath = sPath; y.eBFf sFileName = sName; Pr/&p0@aV this.nSplitter = nSpiltter; (}qLxZ/U W]*wxzf!5z 3i$AR } `") I[h bKaV]Uy ;~q)^.K3 public String getSSiteURL() Tp6ysjao { !c`1~a! return sSiteURL; ^
pR& } BzUx@, 4* hmeS" &boBu^,94 public void setSSiteURL(String value) e)bqE^JP { Tuy*Df sSiteURL = value; +[7u>RJ } 6u7HO-aa y@z#Jw< O&0R ~<n public String getSFilePath() d16PY_ { ,J#5Y. return sFilePath; u60l - } xMh&C{q ?0<3"2Db~ A,/S/_Q= public void setSFilePath(String value) rYqvG { ouI0"R&@ sFilePath = value; &Gt9a-ne } BW;u?1Xa ,5*4%*n\ 3IxT2@H) public String getSFileName() /L
4WWQ5 { f<'C<xnf return sFileName; 3N21[i2/m } lb('r"*. EIfrZg7R 4c yv
8 public void setSFileName(String value) ]9:G3vq { WveFB%@`; sFileName = value; td~3N,S } \NqC i'& 9+']`=a: Z-?9F`} public int getNSplitter() hd B[H8Q { pf_ /jR return nSplitter; V_kE"W) } `4qKQJw ao!r6:&v$e #rwR)9iC0 public void setNSplitter(int nCount) ^b~5zhY& { ^q`*!B9@ nSplitter = nCount; \zUsHK?L"t } mI%/k7:sf } u/f&Wq/ /WfxI>v |*5nr5c_L /* 5,Y2Lzr **Utility.java kR]SxG9 */ A@OV!DJe] package NetFox; rWXW}Yg jlBCu(.,_ %K7}yy&9C public class Utility { 4;||g@f'[ |_*$+ I\~V0<"jI public Utility() ]Yex#K
{ Hi9z<l=$
|Y11sDa9h t,,^^ll } rYQ@"o0/Y M'iKk[Hjfx //线程睡眠 r
`dU
(T! public static void sleep(int nSecond) ?xZmm%JF { 1`{ib
try{ K~-XDLh5Nu Thread.sleep(nSecond); rR~X>+K } S+Yg!RrNqj catch(Exception e) =1\wZuK# { [!mjUsut* e.printStackTrace (); qGCg3u6 } I/jr`3Mj } KCE-6T [i7)E]*oTA //日志 J
*?_SnZ public static void log(String sMsg) 9AzGk=^
{ +=Wdn)T System.err.println(sMsg); D:tZiS=0 } q&T'x> / [uQZD1<q 22~X~= public static void log(int sMsg) cV,Dl`1r { {PtTPz System.err.println(sMsg); 1o 78e2B } ]_8I_VcQ } `|Z@UPHzG %W;Gf9.w \|`Pul$ /* Tk&9Klo **TestMethod.java v:1Vli. */ h##?~!xDmq package NetFox; .oN
Sg.jG .MARF +N:6wZ7<f public class TestMethod { =3dbw8I %uqD\`- 9XvM%aHs: public TestMethod() sNmC#, { ///xx/weblogic60b2_win.exe s^'#"`!v= try{ VQjFEJ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); KVpAV$|e //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); E/$@ud|l" SiteFileFetch fileFetch = new SiteFileFetch(bean); P3ev4DL fileFetch.start(); 42wC."A } Z)T@`B6
catch(Exception e){e.printStackTrace ();} ,h.Jfo54, TxxB0 mW0&uSMD } gdFoTcHgO| f<4q ]HCa &t|V:_?/x public static void main(String[] args) c0Ro3j\p { ^
R^N`V new TestMethod(); $o$Ev@mi } ^npS==Y]!. } (VPM>ndkw 点击下载更多相关资料
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