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/* f-[.^/ **SiteFileFetch.java ^/%Y]d$ */ c1+z(NQ3 package NetFox; 4f8XO"k7t= import java.io.*; @g;DA)!( import java.net.*; %++:
K }93FWo. eX"Ecl{ public class SiteFileFetch extends Thread { z@\mn vShB26b =+T0[|gc(r SiteInfoBean siteInfoBean = null; //文件信息Bean ,98 F long[] nStartPos; //开始位置 o_Y?s+~i[/ long[] nEndPos; //结束位置 \vc&V8 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~~k0&mK|Q long nFileLength; //文件长度 s}`
|!Vyl boolean bFirst = true; //是否第一次取文件 cyHbAtl boolean bStop = false; //停止标志 3PRU File tmpFile; //文件下载的临时信息 U*sQ5uq DataOutputStream output; //输出到文件的输出流 S\t!7Xs%*U ebCS4&c //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #EE<MKka public SiteFileFetch(SiteInfoBean bean) throws IOException /@&o%I3h { :]Om4Q\-# siteInfoBean = bean; =B;qy7? //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); P~:^bU^F7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); T8&sPt,f if(tmpFile.exists ()) u R5h0Fi { `}sFT:1& bFirst = false; rZ-< Ryg read_nPos(); 1)ij*L8k } Hi~)C \ else G^K;+& T { 4K`b?{){+a nStartPos = new long[bean.getNSplitter()]; 3y2L!&'z nEndPos = new long[bean.getNSplitter()]; [`tNa Vg } .:Wp9M `<<9A\Y-f >>C
S8 zlQBBm;fE } "o u{bKe i-4L{T\K y,n.(?!* public void run() xpuTh"ED { eA?|X| //获得文件长度 T7/DH //分割文件 $;=?[Cn //实例FileSplitterFetch x]%,?Vd? //启动FileSplitterFetch线程 Gkfzb>_V] //等待子线程返回 ~/aCzx~ try{ j)iUg03>/4 if(bFirst) \/Q~C! { X#h a*u~U nFileLength = getFileSize(); *x p_# if(nFileLength == -1) D[6sy`5l { ".#h$ System.err.println("File Length is not known!"); 7!Im|7Ty } ttlMZLX{TJ else if(nFileLength == -2) Y@MxKK uj { UM21Cfqex System.err.println("File is not access!"); kqo4
v;r } :2vuc!Pu else j8^#698X { OR|Jc+LT for(int i=0;i<nStartPos.length;i++) b~)2`l { E|_8#xvb nStartPos = (long)(i*(nFileLength/nStartPos.length)); c`lL&*] } /FPO'} 6i for(int i=0;i<nEndPos.length-1;i++) Wk/Q~o { -Ks)1w>l nEndPos = nStartPos[i+1]; 7o!t/WEEq } I7Abf7>*Q nEndPos[nEndPos.length-1] = nFileLength; 5t_Dt<lIz } 6iEg]FI } @/$i
-?E !>Q\Y`a,* Sz1 J4$5 //启动子线程 q?]KZ_a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; aAn p7\7 for(int i=0;i<nStartPos.length;i++) 017n hI { 8o
$` ' fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .Xe_Gp"x siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 368 g>/#' nStartPos,nEndPos,i); rqm":N8@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -w)v38iX! fileSplitterFetch.start(); /f+BeQ3#/ } hPgYKa8u // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pSYEC,0B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); SsfC
m C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", CMv8n@ry nEndPos = " + nFileLength); e?O$`lf // fileSplitterFetch[nPos.length-1].start(); Vl<7> ~P~q' OmfHrlA //等待子线程结束 S-7 C'dc //int count = 0; 8.IenU9 //是否结束while循环 q3K}2g boolean breakWhile = false; DeT$4c*:[
/Q:mUd 01RW|rN while(!bStop) 7xG~4N<)] { QJjk#*?,| write_nPos(); ;3bUgI}.J Utility.sleep(500); f3>DmH# breakWhile = true; :B7U),T x1E;dbOZ gMPp'^g]_ for(int i=0;i<nStartPos.length;i++) ]P>XXE;[ { BD^1V(
I/ if(!fileSplitterFetch.bDownOver) S9%,{y { .EH1;/ breakWhile = false; Y"m(hs$ break; 88?O4)c } )24M?R@r } ! gfd!R if(breakWhile) aS\$@41" break; tB(~:"|8 &" J; fYh<S //count++; P46Q3EE
//if(count>4) M1*bT@6 // siteStop(); H?xYS|
n } 5)h fI7{d @tD (<*f+ k{UeY[,jb System.err.println("文件下载结束!"); CHD.b%_| } A&WC})H5 catch(Exception e){e.printStackTrace ();} L<Z,@q` } u3tT=5.D \ a(ce?C /5j5\F:33 //获得文件长度
R*S:/s public long getFileSize() @_#\qGY { rcY &n^: int nFileLength = -1; ,j.bdlI# try{ &%t&[Se_~ URL url = new URL(siteInfoBean.getSSiteURL()); 3Z&!zSK^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FC+h
\ httpConnection.setRequestProperty("User-Agent","NetFox"); 0\@oqw]6hv V@O)7ND C4|OsC7J int responseCode=httpConnection.getResponseCode(); OIjSH~a. if(responseCode>=400) @>V;guJC% { -%^'x&e processErrorCode(responseCode); UEfY'%x return -2; //-2 represent access is error urCTP.F } ~{vB2 J1~E*t^ !=a]Awr\ String sHeader; \^RKb-6n ?A*!rW:l; 3T4HX|rC for(int i=1;;i++) Zzz94` { K4YD}[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7v0AG: //Utility.log(in.readLine()); =oI6yf&8 Z sHeader=httpConnection.getHeaderFieldKey(i); n+YUG if(sHeader!=null) ecQ,DOX|b { 10OkrNQ if(sHeader.equals("Content-Length"))
uKvdL
" { g-"G Zi nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); c$tX3ug6I break; :XG~AR/ } %2g<zdab } 1<_/Qu>V else AYNdV( break; |5X[/Q*K`W } H6|eUU[& } =adHP|S catch(IOException e){e.printStackTrace ();} IAq
o(Qm catch(Exception e){e.printStackTrace ();} d%-/U!z? W g6H~x iemp%~UZ Utility.log(nFileLength); RwOOe7mv SPt/$uYJ c<MF:|(} return nFileLength; =+ >>l0=_v } @h!Z0}dX( jC{KI!kPt TO"Md["GI //保存下载信息(文件指针位置) 83gWA>Odh private void write_nPos() eNVuw: Q+ { u'>94Gm} try{ A>2 _I) output = new DataOutputStream(new FileOutputStream(tmpFile)); NMf#0Nz- output.writeInt(nStartPos.length); g=@d!]Z~[ for(int i=0;i<nStartPos.length;i++) ^+CHp(X { ~!8j,Bqs+z // output.writeLong(nPos); QKlsBq output.writeLong(fileSplitterFetch.nStartPos); f86Z #% output.writeLong(fileSplitterFetch.nEndPos); *pv<ZF0> } q^Oj/ws output.close(); : MjDcI~ } ov;^ev,( catch(IOException e){e.printStackTrace ();} +jF2{" catch(Exception e){e.printStackTrace ();} c"Vp5lo0 } Yv@n$W`: WulyMcJ jlU6keZh` //读取保存的下载信息(文件指针位置) vB{iw}Hi! private void read_nPos()
OWT%XUW= { .SER,],P try{ C c:<F_UI DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "`4ky] int nCount = input.readInt(); {ilz[LM8( nStartPos = new long[nCount]; <r t$~} nEndPos = new long[nCount]; z8JW iRn for(int i=0;i<nStartPos.length;i++) [WG\wj. { *qk7e[IP nStartPos = input.readLong(); liH#=C8l*% nEndPos = input.readLong(); 'Kbrz } wL="p) TO. input.close(); t&J A1|q } seBmhe5qR catch(IOException e){e.printStackTrace ();} >Bf3X&uS catch(Exception e){e.printStackTrace ();} 2%`=
LGQC } +,LWyvc' 4_U"M@ dgoAaS2M private void processErrorCode(int nErrorCode) OoH-E.lp { W.jXO"pN System.err.println("Error Code : " + nErrorCode); .O5V;&, } m:[I$b6AY Q[rZ1z UF#!6"C@ //停止文件下载 jga \Ry=nw public void siteStop() 9,`i[Dzp { rVoV@,P bStop = true; T>rmm7F for(int i=0;i<nStartPos.length;i++) V@#oQi* fileSplitterFetch.splitterStop(); ob;|%_ z06,$OYz /YHO"4Z } d-+jb<C& } 3-{BXht) //负责部分文件的抓取 3c3;8h$k **FileSplitterFetch.java 'kcR:5B */ aXJ/"k #Tl package NetFox; 72Y6gcg NGl
8*Af 3,{eH6,O7M import java.io.*; ,S=[# import java.net.*; rD SYR\cg 9|Jv>Ur=)2 9 $$uk'}w! public class FileSplitterFetch extends Thread { \+O.vRc"M Z6i~Dy3 PD.$a-t String sURL; //File URL )-Hs]D: long nStartPos; //File Snippet Start Position }" vxYB!h3 long nEndPos; //File Snippet End Position gI;"P kN int nThreadID; //Thread's ID `7:uc@ boolean bDownOver = false; //Downing is over eQu(3 sYb boolean bStop = false; //Stop identical NF6xKwRU]_ FileAccessI fileAccessI = null; //File Access interface {Fw"y %a^ Rq5'=L s~A-qG> public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Lxv 4w { goIvm:? this.sURL = sURL; ~. vridH this.nStartPos = nStart; S1U0sP@o this.nEndPos = nEnd; ;98b SR/ nThreadID = id; o&E8<e fileAccessI = new FileAccessI(sName,nStartPos);//定位 eb\S pdM6 } aM;SE9/U Y_:jc{? b3E1S+\=~ public void run() S=!WFKcJR { <7\j\` while(nStartPos < nEndPos && !bStop) i3N{Dt { (is' ,4^b $ItmYj.m D0FX"BY7 try{ m.m6. URL url = new URL(sURL); :&vX0
Ce: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j}ob7O&U'w httpConnection.setRequestProperty("User-Agent","NetFox"); 0@-4.IHl String sProperty = "bytes="+nStartPos+"-"; FDLo|aP/v httpConnection.setRequestProperty("RANGE",sProperty); [8sYE h Utility.log(sProperty); KQNQ<OE4 [q2:d^_FA Ol RXgJ InputStream input = httpConnection.getInputStream(); 4@{cK| //logResponseHead(httpConnection); $lf/Mg_H t2(X .))jR:{3 byte[] b = new byte[1024]; =eU=\td^ int nRead; vY m:V:7Y2 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "@eGgQ { /f1]U
LmC: nStartPos += fileAccessI.write(b,0,nRead); Q/4-7 //if(nThreadID == 1) t[`LG) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Gg'!(]v } .T9$O]:o QX<n^W A,<5W } Utility.log("Thread " + nThreadID + " is over!"); .Q!d[vL bDownOver = true; 0>BxS9?w //nPos = fileAccessI.write (b,0,nRead); y2_rm } 1]Xx{j< catch(Exception e){e.printStackTrace ();} IAH"vHM } }S uj=oFp } 8j#S+=l> 1DB{"8ov M=Ze)X\E*' //打印回应的头信息 DlUKhbo$g public void logResponseHead(HttpURLConnection con) Q`9c/vPU { UXBWCo;- for(int i=1;;i++) 1,+<|c)T? { g D6S%O String header=con.getHeaderFieldKey(i); aKriO if(header!=null) }g/u.@E //responseHeaders.put(header,httpConnection.getHeaderField(header)); 4)w,gp Utility.log(header+" : "+con.getHeaderField(header)); Z|n|gxe else {O2=K#J break; +s}&'V^ } q!:dZES } [n[dr@J7v
U=~?ca *0>`XK$mWo public void splitterStop() MT~^wI0a { ]!{S2x&" bStop = true; ]M*`Y[5" } D5c
8sB u @Ze@N% =l43RawAmu } W9%v#;2 A,_O=hA2I ; R+>}6 /* T-a>k.}y **FileAccess.java e
n~m)r3& *//文件访问(定位,写) Qf( A package NetFox; T5u71C_wmt import java.io.*; Q^f{H. 4}m9,
b M1\z public class FileAccessI implements Serializable{ i4|R0>b AaYH(2m- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !ddyJJ^a RandomAccessFile oSavedFile; Q[#}Oh6$ long nPos; ^ 0YQlT98 >*{k~Y-G P$U"y/ public FileAccessI() throws IOException H\QkU`b { W\zZ&*8$ this("",0); J~5V7B } S9l,P-X` zE/l wvq4 P public FileAccessI(String sName,long nPos) throws IOException +Xs E { _A C N oSavedFile = new RandomAccessFile(sName,"rw"); 1jd{AqHl this.nPos = nPos; VH]}{i"` oSavedFile.seek(nPos); yIKpyyC9H } _!o8s%9be $!*>5".A /3aW 0/^o public synchronized int write(byte[] b,int nStart,int nLen) @KL&vm(F$ { F^gTID int n = -1; Bn]=T try{ E_=F'sP? oSavedFile.write(b,nStart,nLen); $97O7j@ n = nLen; /8e}c` } cRf F!EV catch(IOException e) C Imp,k0 { xw9ZRu<z e.printStackTrace (); F~6]II } ,5$G0 Fy{yg]O" ;<garDf return n; R278 ^E } N-upNuv [<53_2]~ Eto"B" } YAc:QVT87 <ZSXOh,' `w
6Qsah /* HMF2sc$N **SiteInfoBean.java \eKXsO"d */ @~$d4K
y< package NetFox; >}* W$i :o8`2Z *g nz?[ public class SiteInfoBean { xJ$uoy3+ #S?^?3d %8n<#0v-|4 private String sSiteURL; //Site's URL u*@R`,Y
private String sFilePath; //Saved File's Path ! :]_-DX private String sFileName; //Saved File's Name #$BFTlm| private int nSplitter; //Count of Splited Downloading File }eVDe(7_ 72Bc0Wg
et+lL"& public SiteInfoBean() B9NUafK= {//nSplitter的缺省值为5 X6
BIZ //default value of nSplitter is 5 sR9$=91` this("","","",5);
!tTv$L> } ,CyX*k8o &'/"=lK }9\_s* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J`5+Zngr { 9Do75S{( sSiteURL= sURL; $^fF}y6N sFilePath = sPath; 1TQ?Fxj sFileName = sName; Xq$-&~
this.nSplitter = nSpiltter; @ !")shc 4JK6<Pk nCi
]6;Y } W5Z-s.o :<P4=P P GPHb- public String getSSiteURL() +
-Rf@ { 6HCg<_j] return sSiteURL; f)_<Ih\/7_ } LKvX~68 @LI;q m[=SCH-; public void setSSiteURL(String value) W\>O$IX^e { Dh`&B sSiteURL = value; _5 SvZ;4 } 7310'wc E9\"@wu[d :-d#kU public String getSFilePath() legWY)4D; { HjK8y@j return sFilePath; q+9^rQ } 8)8~c@ y0p=E^QM fC'u-m?!Q' public void setSFilePath(String value) sX6\AYF1M { y<6Sl6l* sFilePath = value; ^4`x:6m } p'LLzc## $EY[CA
E Xi"9y @ public String getSFileName() &qWg$_Yh { cV>?*9z0 return sFileName; p|-> z } 6kp)'wz` :.AC%'S Y[L,rc/j public void setSFileName(String value) |5(un# { o+hp#e sFileName = value; !X7z y9 } =k<b* 8 O;4S<N R^`}DlHX public int getNSplitter() #"6l+} { :i>LESJq return nSplitter; #tZ!D^GQHq } 5*2hTM! ?:/J8s
[O ]uFJ~:R public void setNSplitter(int nCount) tiGH#~? { |rJN nSplitter = nCount; o%+w:u. } gtH^'vFZ } U $#^ e 2#$7!`6K
*1v3x:pQ' /* x(u.(:V **Utility.java -}TP)/!,* */ [cDDZ+6 package NetFox; (zsmJe aW:*!d# >AV9 K public class Utility { 3q/"4D j6^.Q/{^ ^kK")+K public Utility() pWzYC@_W
{ a`yCPnB( 4;~xRg;u&* ww
%c+O/ } br88b`L :@&e~QP( //线程睡眠 2A public static void sleep(int nSecond) @8J*vY =e { G?F!Z"S try{ Ke^/aGi}O Thread.sleep(nSecond); '2l[~T$* } "T /$K catch(Exception e) y+B iaD!U { 9*j"@Rm e.printStackTrace (); "
AvEo } o&q:b9T } MA tF, `vt+VUNf
//日志 YH^U"\}i public static void log(String sMsg) ^Mm%`B7W { _Rjbm'kC System.err.println(sMsg); xM)P=y_!M+ } @&HLm^j2O y46sL~HRv "?aE3$/ public static void log(int sMsg) W{JR%Sq$ { |LIcq0Z System.err.println(sMsg); um PN=0u6 } nUq@`G } ii`,cJl 'O ~_g5kC De$Ic"Z9L /* MIr[_ **TestMethod.java Xl$r720ZJr */ E\4ZUGy0 package NetFox; ~]%re9jGW rr1,Ijh{D F'<XB~&o public class TestMethod { 7zQGuGo( l66 QgPA /FTP8XHwL) public TestMethod() (Ms #)E { ///xx/weblogic60b2_win.exe ?aaYka] try{ ]S(nA!] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hHEn //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); l;z+E_sQ SiteFileFetch fileFetch = new SiteFileFetch(bean); 3KD:JKn^ fileFetch.start();
fCb&$oRr! } <vg|8-,#m catch(Exception e){e.printStackTrace ();} Ktuv
a3=>N pTQ7woj} ak}ke } F+zHgE qCk`398W (Gzq 1+B public static void main(String[] args) Ey&A\ { gvjy'Rm new TestMethod(); >0N$R|B& } L!5="s[} } F ww S[3 点击下载更多相关资料
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