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/* nfa_8 **SiteFileFetch.java 7|{ B# */ -EVs@:3]j package NetFox; VZTmzIk.Y import java.io.*; wePI*."] import java.net.*; fw:7U%MGv |SxMN%M! },v&rkwR public class SiteFileFetch extends Thread { ]d^k4 d 'H!V54
\j TqXge{r SiteInfoBean siteInfoBean = null; //文件信息Bean W oWBs)E long[] nStartPos; //开始位置 FN>L7
*,0 long[] nEndPos; //结束位置 <c(&T<$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 _TrZ'iL}T long nFileLength; //文件长度 N6WPTUQ1mF boolean bFirst = true; //是否第一次取文件 rykj2/O boolean bStop = false; //停止标志 . Jptj File tmpFile; //文件下载的临时信息 gU+ss DataOutputStream output; //输出到文件的输出流 WqR7uiCi el}hcAY/RP //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) :Jm!=U%'Z public SiteFileFetch(SiteInfoBean bean) throws IOException ~};]k } { WejyYqr34- siteInfoBean = bean; k~{Fnkt //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >n1h^AW tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); [#IBYJ.6 if(tmpFile.exists ()) [;*\P\Xih { 40R"^* bFirst = false; VZHr-z$6n read_nPos(); 28ja-1dB } 0e)lY='^_ else >CH { xUQdVrFU nStartPos = new long[bean.getNSplitter()]; '^e0Ud, nEndPos = new long[bean.getNSplitter()]; g
,`F<CF9 } QjI#Cs}w b/z'`?[ l},dQ4R 5[nmP95YK } Wux 0RF& zaH
5
Km_j :,jPNuOA public void run() 'J2ewW5 { o1Ne+Jt //获得文件长度 ,tau9>! //分割文件 ix:2Z- //实例FileSplitterFetch ES^NBI j5P //启动FileSplitterFetch线程 EN)YoVk //等待子线程返回 bAN 10U try{ E2h(w_l if(bFirst) 15o9CaQw4" {
c^rC8E nFileLength = getFileSize(); *U:VM'a if(nFileLength == -1) DE5d]3B { z'?SRK5+ System.err.println("File Length is not known!"); I; ^xAd3G } ?Y%}(3y else if(nFileLength == -2) VIb;96$Or { 92s4u3L; System.err.println("File is not access!"); B^H4Q
4- } j'\>Nn+ else )uANmThOz { 2TE\4j for(int i=0;i<nStartPos.length;i++) p 7
,f6kG { 3gC\{y!8 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ] gH
wfqx } TViBCed40 for(int i=0;i<nEndPos.length-1;i++) {F<)z%^ { kZJt~} nEndPos = nStartPos[i+1]; eH ;Wfs2f } f#*h^91x nEndPos[nEndPos.length-1] = nFileLength; f;e_04K } 2j2mW>Z } Ga]47pQ"F u9esdOv `Q:de~+AM{ //启动子线程 ~&t!$ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; { k
kAqJ for(int i=0;i<nStartPos.length;i++) i:C.8hmAE { ;+TMx( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h1n*WQ- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &\JK%X.Jlt nStartPos,nEndPos,i); d,zp`S Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q1aHIc
fileSplitterFetch.start(); 976E3u"Vt } " ]aQ Hh]f // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AEB/8%l};v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); gmXy>{T // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", vEu
Ka<5 nEndPos = " + nFileLength); xylpiSJ // fileSplitterFetch[nPos.length-1].start(); [Bl
$IfU E~'q?LJOB 1,m\Q_ //等待子线程结束 ) ~ l\ //int count = 0; 1[26w_B3 //是否结束while循环 >`<Ued boolean breakWhile = false; K4iI: eKL]E! !x`;>0 while(!bStop) ?R dmKA { Mi;}.K0J write_nPos(); K#_~
!C4L Utility.sleep(500); :&xz5c`"04 breakWhile = true; D-'i G%)kA ev~dsk6k 6\; 4
4,3 for(int i=0;i<nStartPos.length;i++) ;M%oQ>].[ { m\<<oIlH if(!fileSplitterFetch.bDownOver) l0qdk#v { 5x:Ift
* breakWhile = false; p>2|| break; j)g_*\tQ } i58ZV`Rk` } Zkf 3t>[ if(breakWhile) *54>iO-
c break; ^</65+OT+ r~ZS1Tp 5F'%i;)oq //count++; r^?)F?n! //if(count>4) aR`_h=a // siteStop(); hB|H9+ } (%``EIc<8 h$E\2lsE aK8bKlZe System.err.println("文件下载结束!"); )B-MPuB } ^VSt9& catch(Exception e){e.printStackTrace ();} yw;ghP; } Fpy6"Z?z ^n\9AE3 L9E;Uii0 //获得文件长度 l=oN X"l= public long getFileSize() + ")qi= { {DKXn`V int nFileLength = -1; F{#N6,T try{ !yoSMI- URL url = new URL(siteInfoBean.getSSiteURL()); 8[6ny=S` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7Vz[ji httpConnection.setRequestProperty("User-Agent","NetFox"); bBkm]
> u Y?/B~ qZT 4+&y int responseCode=httpConnection.getResponseCode(); Q'n(^tbL if(responseCode>=400) 4+ASwN9 { 4 e=/f,o1 processErrorCode(responseCode); nz,Mqol return -2; //-2 represent access is error >i^y;5 } -X"5G
tYI]LL $nUd\B$.= String sHeader; 6{JR 0 "#mXsp-ut *u|lmALs for(int i=1;;i++) ?noETH z) { y3
({(URU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); _hAj2%SL //Utility.log(in.readLine()); 0EL\Hd sHeader=httpConnection.getHeaderFieldKey(i); c8bca` if(sHeader!=null) 7\7 Brw4 { ?z \q Mu if(sHeader.equals("Content-Length")) F&W0DaH { 21[K[ % nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tnQR< break; 7Y-FUZ.`> } &+)+5z_d } p9FA_(`^ else uE,i-g0$Id break; v`[Tl } %v?jG(o } AijPN catch(IOException e){e.printStackTrace ();} "E@NZ*"u catch(Exception e){e.printStackTrace ();} R-r+=x& 4*p_s8> > R9b/?*%=9 Utility.log(nFileLength); !$:0E
y(S M iP[UCh Wo:zU return nFileLength; u+2xrzf } Yv#J`b@y H(5S Kv5 }aHB$}"! //保存下载信息(文件指针位置) P?Gd}mdX?m private void write_nPos() VfL]O 8P> { 8Pr&F try{ c]AKeq] output = new DataOutputStream(new FileOutputStream(tmpFile)); mhHA!:Y output.writeInt(nStartPos.length); 8!
|.H p for(int i=0;i<nStartPos.length;i++) EmtDrx4!(f { U~u6}s]: // output.writeLong(nPos); >:Rt>po8|w output.writeLong(fileSplitterFetch.nStartPos); z")3_5Br output.writeLong(fileSplitterFetch.nEndPos); o1 hdO } {#dp-5V output.close(); .c=$ bQ>^ } u%+6Mp[E catch(IOException e){e.printStackTrace ();} E)&NP}k-P catch(Exception e){e.printStackTrace ();} !#,- } r+{!@`dYi E"9/YWv B#qL$M,| //读取保存的下载信息(文件指针位置) 38x[Ad4% private void read_nPos() ^D]7pe { ~>}dse try{ tMD^$E"C DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); U<ku_(2"# int nCount = input.readInt(); 7
SjF9x nStartPos = new long[nCount]; ~.PPf/
Z8] nEndPos = new long[nCount]; !L0E03')k for(int i=0;i<nStartPos.length;i++) n&2=6$*,k { C|.$L<` nStartPos = input.readLong(); -)y> c nEndPos = input.readLong(); U(S@1i( } EO o'a input.close(); N27K } {a+Fx}W catch(IOException e){e.printStackTrace ();} )*^OPVt catch(Exception e){e.printStackTrace ();} >j(I[_g } gZ`#tlA~ qHC*$v#.V? SHXa{- private void processErrorCode(int nErrorCode) i#@ v_^ q { gqO%^b)6 System.err.println("Error Code : " + nErrorCode); vc>^.#7
} ??$i* uJ|5Ve IEIxjek //停止文件下载 UZ4tq public void siteStop() 4 BE:&A { {L-{Y<fke bStop = true; wRV`v$*6 for(int i=0;i<nStartPos.length;i++) 4AJu2Hp fileSplitterFetch.splitterStop(); J-eA,9J 9:CVN@E ~
X]"P4 u } o5*74Mv } ?vht~5' //负责部分文件的抓取 T(sG.% **FileSplitterFetch.java 1eE]4Z4Q */ JhMrm% package NetFox; 9AVK_ $.r}g\43P 7N} \1Di5 import java.io.*; q^jqLT&w import java.net.*; (04j4teE 6S! lD= m5'__< public class FileSplitterFetch extends Thread { 2kp|zX( A3
Rm0 %4r!7X|O< String sURL; //File URL ' F 6au[ long nStartPos; //File Snippet Start Position |04}zU%N long nEndPos; //File Snippet End Position (<>Sz( int nThreadID; //Thread's ID C~
}Wo5 boolean bDownOver = false; //Downing is over xdbu|fC boolean bStop = false; //Stop identical WoClTb>F FileAccessI fileAccessI = null; //File Access interface T,xVQ4J? fr,CH{Uq ;8%@Lan public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Ivt)Eg { ?4wehcZz this.sURL = sURL; ?Qo_
KQ%sn this.nStartPos = nStart; dp// p)B> this.nEndPos = nEnd; psyH?&T nThreadID = id; GH; F3s fileAccessI = new FileAccessI(sName,nStartPos);//定位 O'&X aaZV } wNf*/?N g`~lIt[=
t;e]L'z@: public void run() of[|b{Ze4~ { H~_^w.P while(nStartPos < nEndPos && !bStop) RqX4ep5j { x
w?9W4< Op$J"R P :7l#/x_ try{ !Lg}q!*%>V URL url = new URL(sURL); w=P<4bdT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {6=H/g=:i httpConnection.setRequestProperty("User-Agent","NetFox"); e~2*>5\: String sProperty = "bytes="+nStartPos+"-"; y?R <g^A httpConnection.setRequestProperty("RANGE",sProperty); #:ED 0</ Utility.log(sProperty); m|Q&Lphb8 PE;0
jgsiI qI V`zZc InputStream input = httpConnection.getInputStream(); 6q
xUT //logResponseHead(httpConnection); z5o9\.y({ xt<,
(4u {7pE9R 5 byte[] b = new byte[1024]; /bNVgK`L5 int nRead; L/ICFa.G while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) t-<[._:+ { 2Z IpzH/8 nStartPos += fileAccessI.write(b,0,nRead); (?&_6B.* //if(nThreadID == 1) ! 4^L $ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +DV6oh } C)3$";$5) C"m0"O> E*T84Jh6 Utility.log("Thread " + nThreadID + " is over!"); gx>mKSzy bDownOver = true; 7q{v9xKy //nPos = fileAccessI.write (b,0,nRead); @SQ*/sw (c } Fp|rMq catch(Exception e){e.printStackTrace ();} W*/s4 N } n`I
jG } nO.+&kA -5-SlQu 3_1Io+uXk //打印回应的头信息 3xCA\* public void logResponseHead(HttpURLConnection con) C;:1CK { %ucmJ-<y# for(int i=1;;i++) ##+8GLQM { *
SON>BSF String header=con.getHeaderFieldKey(i); Kp=3\) & if(header!=null) $d??( //responseHeaders.put(header,httpConnection.getHeaderField(header)); )i6U$,] Utility.log(header+" : "+con.getHeaderField(header)); $b
71 else F0ivL` break; ks` } CR<pB)F?a } )'I<xx'1 PS<tS_. sxQ ,x/O public void splitterStop() 7!yF5+_d { _ L:w;Oy9T bStop = true; my\oC^/9 } Z FrXw+ Ef*.}gcU sFz4^Kn } N n-6/]d# yNMwd.r[ I3[RaZ2z{ /* "?0G^zu **FileAccess.java {j=hQL3 *//文件访问(定位,写) <!HDtN package NetFox; +&zuI import java.io.*; 7Caap/L: H2_>Av{m H><mcah public class FileAccessI implements Serializable{ ORPl^n- 7u3b aM //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @/2wmza%2 RandomAccessFile oSavedFile; E#V-F-@2 long nPos; fD}]Mi:V <.%8j\j( j8A R# public FileAccessI() throws IOException N{ z(|2{A# { {|wTZ this("",0); ,'{B+CHoS } te4"+[ $| 7Hlh
(k >5},qs:lZ public FileAccessI(String sName,long nPos) throws IOException 3$G25=eN { |/Q. "d oSavedFile = new RandomAccessFile(sName,"rw"); 3LnyQ this.nPos = nPos; 9l^ oSavedFile.seek(nPos); M,U=zNPnk } NeZYchR F4{. 7BT 7ofH@U public synchronized int write(byte[] b,int nStart,int nLen) \^W? { z)y(31K<1 int n = -1; ph'SS=!. try{ a|{<#<6n( oSavedFile.write(b,nStart,nLen); k.R/X n = nLen; ZZJ"Ny.2 } YZtA:>;p catch(IOException e) ZTz(NS
EK { x3F L/^S e.printStackTrace (); #K*q(ei,7h } LzSusjEW@ 6]A\8Ty 7
,~Krzv return n; ,ui'^8{gK } WG=r? xE Jj!tRZT 5:3$VWLa
< } krY.Cc] WjxBNk'f 8r| /* :H:}t>X6Vo **SiteInfoBean.java /*2W?ZM~H */ q$*_C kT package NetFox; |2` $g sWzXl~JbF ;8Q?`=a public class SiteInfoBean { e7AI&5Eg{ JV{!Ukuyp+ t7%Bv+Uo private String sSiteURL; //Site's URL r<H^%##,w private String sFilePath; //Saved File's Path @!HMd{r private String sFileName; //Saved File's Name TbM*?\7 private int nSplitter; //Count of Splited Downloading File fBh|:2u u+FftgA 5W'|qmJ public SiteInfoBean() (?wKBUi {//nSplitter的缺省值为5 K4L#%KUPW //default value of nSplitter is 5 .tZ$a_O this("","","",5); [<Puh } 32' 9Ch. itMc!bUQ ttt&sW` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E*"E{E7 { td$Jx}'A sSiteURL= sURL; K`2DhJC sFilePath = sPath; Z4sjH1W sFileName = sName; TyXOd,%zl this.nSplitter = nSpiltter; .b)(_* Efd[ZJxS6 `G{t<7[[; } HYa!$P3}[ AU\!5+RDB ?%n9g)>Yej public String getSSiteURL() v)pWx0l= { W]]2Uo. return sSiteURL; O/@ [VPf } [$+61n}.12 ho<#i( nXW1 : public void setSSiteURL(String value) ]&BFV%kw { 3Or3@e5r sSiteURL = value; Qp Vm } Um&@
0C+L 2l%iXK[ (acRYv( public String getSFilePath() q@>
m~R { t')I c6.?i return sFilePath; Stx-(Kfn4 } nJw1Sl5 l,8|E #r}c<?>Vw public void setSFilePath(String value) (P_+m# { }RK9Onh3G sFilePath = value; RH'R6 } J#nEGl|a SjU6+|l m8`A~ public String getSFileName() 1 crjRbi { Xb;`WE gC return sFileName; 6P$q7G } 8b
$7# .=D6<4#t :v48y.Ij7s public void setSFileName(String value) ;W:Q}[ { !%=k/|# sFileName = value; O;tn5 } Vt>E\{@[t ]t<%>Z$ >
[7vXm4 public int getNSplitter() 3EdPKM j& { :eO0{JN4T return nSplitter; Ha\ hQ'99 } s=+G%B' 2|EoP-K7 5lbh
"m= public void setNSplitter(int nCount) fA5#
2P{ { 0U~JSmj:2K nSplitter = nCount; ]|(?i ,p } RUO6Co- } y3GIR
f;> !Zx>)V6. 7dIDKx /* W3kilhZ **Utility.java =#Jb9=zdR */ ?Ci\3)u,P package NetFox; m-]"I8[ xCD+qP^ kE}Ib4]J public class Utility { 1owoh,V6 6ZJQ '9f \zU R9h public Utility() P*Nl3?T { %-.GyG$i "tIx$?I ,'}ZcN2) } wz57.e!Me= \/%mabLK //线程睡眠 k2a^gCBC public static void sleep(int nSecond) yo=d"*E4^ { mbK$Wp# try{
%G*D0pE Thread.sleep(nSecond); qK
pU.rP } zjS<e
XLs[ catch(Exception e) EWi@1PAZK { OduTg^R e.printStackTrace (); ?T&D@Ohsx } shRvwE[ } r}w 9?s^rB Kk#@8h> //日志 wO9<An public static void log(String sMsg) Z'~FZRF { t<=L&:<N System.err.println(sMsg); I&9B^fF6 } 1zffPC8jl sQ$FtKm6 :1I,:L public static void log(int sMsg) {z7{ta { 6>Fw,$ System.err.println(sMsg); 6 9Cxh } P#C`/%$S } !~#31kL& q]aRJ`9f 1vr/|RWW /* gkjZX
wp **TestMethod.java n >^?BU */ 9cQSS'`F package NetFox; {rDZKy^f uo^>95lkv +y2*[ public class TestMethod { @QofsWC Q]HRg4r ?bEYvHAzg public TestMethod() okW3V}/x/z { ///xx/weblogic60b2_win.exe iT5%X try{ A@4Cfb@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); l d@^$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5y)kQ<x" SiteFileFetch fileFetch = new SiteFileFetch(bean); Z'~5L_.]Ai fileFetch.start(); &*}S 0 } pfG:PrZ catch(Exception e){e.printStackTrace ();} d$ /o\G 0WFZx
Ad" d0,I] " } "v06Fj>q )]}*oO A,osrv public static void main(String[] args) @UA>6F { :5(TOF new TestMethod(); We`axkC } 5D#*lMSP"' } sr\MQ?\fB 点击下载更多相关资料
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