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/* ebB8.(k9G3 **SiteFileFetch.java uy=E92n3 */ M4}zRr([.5 package NetFox; +0n,>eDjg^ import java.io.*; d7L|yeb" import java.net.*; k.#[h@Pm #K[6Ai=We} >zcp(M98 public class SiteFileFetch extends Thread { ,6^V)F ]4-t*Em ~2U5Wt SiteInfoBean siteInfoBean = null; //文件信息Bean )%(H'omvl long[] nStartPos; //开始位置 NE!] long[] nEndPos; //结束位置 uB3Yl=P FileSplitterFetch[] fileSplitterFetch; //子线程对象 @>hXh
+!2h long nFileLength; //文件长度 --|L?-2k, boolean bFirst = true; //是否第一次取文件 u]QG^1.qYe boolean bStop = false; //停止标志 'xc=N File tmpFile; //文件下载的临时信息 o7s<G8;? DataOutputStream output; //输出到文件的输出流 UL\gcZ
Zkl Vb8{OD3PK //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) QU^?a~r public SiteFileFetch(SiteInfoBean bean) throws IOException w<=-n;2 { se]QEd7]7 siteInfoBean = bean; YH$whJ`W0 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); w,zgYX& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); KH76Vts if(tmpFile.exists ()) +K*_=gHF. { {FNq&)#` bFirst = false; r*4@S~; read_nPos(); -VRKQNT } $t42?Z=N&z else *6P)HU@ { {(qH8A nStartPos = new long[bean.getNSplitter()]; wg 6 nEndPos = new long[bean.getNSplitter()]; _,]@xFCOH } a6.0$' ^>!~%Vv7! Z <vTr6? 3gU*,K7 } R//S(eU68\ /c-%+Xd nL-kBW Ed> public void run() ]5i]2r1 { (e6KSRh2fF //获得文件长度 S?LUSb //分割文件 iQ_^MzA //实例FileSplitterFetch i?pC[Ao-_ //启动FileSplitterFetch线程 Z%O>|ozpq //等待子线程返回 8qQrJFm|3* try{ +%RB&:K7, if(bFirst) q| 7$@H^* { 0w
]
pDj nFileLength = getFileSize(); gpzZs<ST if(nFileLength == -1) SI@Yct]<g { !7fVO2m T System.err.println("File Length is not known!"); 9Kd:7@U } *%`jcF else if(nFileLength == -2) Hs6}~d { B#;0{ System.err.println("File is not access!"); [}bPkD } 7FD.3/ else E'4dI: {
66s h r for(int i=0;i<nStartPos.length;i++) ,2_!hm/ { dsUY[X-<6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); 04cNi~@m } r:uW(<EP^ for(int i=0;i<nEndPos.length-1;i++) _q dLA { 2
VGGSLr nEndPos = nStartPos[i+1]; fE/|U|5L[ } 8Nz Xe 7 nEndPos[nEndPos.length-1] = nFileLength; U/I+A|S[ } `h|>;u } 1$G'Kg/ >On"BP# U Ks-aJ+} //启动子线程 h9 &V
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; nH^RQ'19 for(int i=0;i<nStartPos.length;i++) F|t_&$Is? { O:3DIT1#> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i(@<KH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), bZsg7[: C nStartPos,nEndPos,i); 3teanU` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f.SmCgG fileSplitterFetch.start(); =3?"s(9 } =c(3EI'w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P",E/beV siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 2DbM48\E // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +4%:q~C nEndPos = " + nFileLength); trC+Etc // fileSplitterFetch[nPos.length-1].start(); y()Si\9v E)7ODRVbl PofHe //等待子线程结束 \9t6#8 //int count = 0; \4e6\6 + //是否结束while循环 nmrYB w> boolean breakWhile = false; Bpw<{U ,"W.A hPHrq{YZ while(!bStop) Du2v,n5@ { !HP/`R write_nPos(); vAMr&[ Utility.sleep(500); jL[
hB breakWhile = true; Y2,\WKa $"&U%3 SMdkD]{g for(int i=0;i<nStartPos.length;i++) hMiuv_EO! { B=`"!?we if(!fileSplitterFetch.bDownOver) 9&`ejeD { )c$)am\I{ breakWhile = false; Z*rA~`@K6 break; Ut
xe } d@72z r } ^BFD -p if(breakWhile) op%?V: break; (\6R"2 Z/ypWoV( _("&jfn
//count++; XiB]I5(hcc //if(count>4) g$f; // siteStop(); CxOBH89( } HBFuA.", 0w_2E ]'/ZSy, System.err.println("文件下载结束!"); ~t~5ctJ@ } 4U*uH catch(Exception e){e.printStackTrace ();} H}$hk } E0i_sB~T ;|Ja|@82 tyLR_@i%% //获得文件长度 \#A=twp public long getFileSize() P00pSRQHD { K{&b "Ba1 int nFileLength = -1; 42m}c1R try{ Qb|.;_ URL url = new URL(siteInfoBean.getSSiteURL()); CXsi HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &Tf R]. httpConnection.setRequestProperty("User-Agent","NetFox"); S}hg*mWn{$ 69v[*InSd ]cv|A^ int responseCode=httpConnection.getResponseCode(); E+&]96*Lby if(responseCode>=400) ewn/@;E { d[9NNm*htC processErrorCode(responseCode); ,A>i)brc return -2; //-2 represent access is error CKTD27}) } X; gN[ G"BoD 5m ):_x String sHeader; -^(NIl' L^`oJ9k! M]>JI'8 for(int i=1;;i++) N
-]m <z> { cg,_nG]i //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }<wj~f([ //Utility.log(in.readLine()); 8elT/Wl sHeader=httpConnection.getHeaderFieldKey(i); DT=! if(sHeader!=null) Ccocv>=Q&J { a91Q*X% if(sHeader.equals("Content-Length")) /rNY;qXM { pr-{/6j6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); QsmG(1= break; L#e|t0'# } .~5cNu'#m } (!'; else Oed&B break; 7 #,+Q(2 } B%Yb+M&K } N[}XLhbt catch(IOException e){e.printStackTrace ();} V,uhBMT# catch(Exception e){e.printStackTrace ();} _W:
S>ij( TBQ`:`g^m \~ Utility.log(nFileLength); RU`TzD b>%I=H%g ^3`98y.Q return nFileLength; `.dTkL } ^}8_tZs8\ p;n )YY$ U6=m4]~Z //保存下载信息(文件指针位置) e<^tY0rR& private void write_nPos() 0nAeeVz| { ,>(M5\Z/c try{ H[x 9 7r output = new DataOutputStream(new FileOutputStream(tmpFile)); T^GdN_qF output.writeInt(nStartPos.length); 4(JxZ49 for(int i=0;i<nStartPos.length;i++) GX_Lxc_<f { {\t:{.F
A // output.writeLong(nPos); y|KDh'Y output.writeLong(fileSplitterFetch.nStartPos); ^d"tymDd output.writeLong(fileSplitterFetch.nEndPos); E"Xi } :;"3k64 output.close(); ,`|KNw5 } d*3R0Q|#{ catch(IOException e){e.printStackTrace ();} cf@#a@7m9 catch(Exception e){e.printStackTrace ();} qRB7I:m-Wi } 7k3":2: B0Z~L){i /KKX;L[D( //读取保存的下载信息(文件指针位置) v *:m|wl private void read_nPos() A|>a
Gy { wCvD4C.WH try{ kX1hcAa DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); zMrZ[AU int nCount = input.readInt(); t*Q12Q nStartPos = new long[nCount]; fWm;cDM
H nEndPos = new long[nCount]; PfrW,R~r for(int i=0;i<nStartPos.length;i++) JsPuxu_ { kd\G> nStartPos = input.readLong(); .yWdlq## nEndPos = input.readLong(); Fr%KO)s2 } uR"]w7= input.close(); +[2lS54"W4 } `bC_J,>_ catch(IOException e){e.printStackTrace ();} u gfV' catch(Exception e){e.printStackTrace ();} 5o~Z> } dbZPt~S'$ Q|G[9HBI '`o+#\,b^% private void processErrorCode(int nErrorCode) m@c2'*&Y { ;pB?8Z System.err.println("Error Code : " + nErrorCode); E/GI:}YUy_ } DTIy/ m dC. FO- j#p3c //停止文件下载 G#%
=R`k/ public void siteStop() % 9WWBxS { *`jEg=) bStop = true; *gT
TI;: for(int i=0;i<nStartPos.length;i++) n(o
Jb fileSplitterFetch.splitterStop(); %)aDh
}
xEiW]Eo ^$#Q_Y| } Y66 vJ<lM } o!H"~5Trv! //负责部分文件的抓取 E>V8|Hz; **FileSplitterFetch.java 3]VTQl{P */ t1~*q)!Mo package NetFox; P7Y[?='v .HtDcGp 2C8M1^0:Z import java.io.*; $K
G?d>wx import java.net.*; *@Qt*f OQsH,' cALu public class FileSplitterFetch extends Thread { Ahebr{u X>wQYIi ]CL70+[^9 String sURL; //File URL L]tyL) long nStartPos; //File Snippet Start Position 6a,YxR\ long nEndPos; //File Snippet End Position P2Eyqd8 int nThreadID; //Thread's ID |F=^Cu, boolean bDownOver = false; //Downing is over 54)}^ftY^ boolean bStop = false; //Stop identical yi%B5KF~Al FileAccessI fileAccessI = null; //File Access interface 7xd}J(l &`%C'KZ 7v:;`6Jb public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException PHOW,8)dZh { WMC6dD_6e this.sURL = sURL; 0+H"$2/ this.nStartPos = nStart; {l1;&y? this.nEndPos = nEnd; @O(\TIg nThreadID = id; ``\H'^{B fileAccessI = new FileAccessI(sName,nStartPos);//定位 7:;V[/ } FJ[(dGKeE JEd/j
zR( P~*fZ)\}F@ public void run() qj/P4 *6E { EagI)W!s[ while(nStartPos < nEndPos && !bStop) Fq3;7Cq=hD { lk'RWy"pw =Vv{ td C/$IF M< try{ L@ay4,e.bz URL url = new URL(sURL); s-DtkO
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l;C_A;y\ httpConnection.setRequestProperty("User-Agent","NetFox"); &S{F"z String sProperty = "bytes="+nStartPos+"-"; oc?VAF httpConnection.setRequestProperty("RANGE",sProperty); T<?;:MO88 Utility.log(sProperty); D;E&;vP6% doa$
;=wg Q7s1M&K InputStream input = httpConnection.getInputStream(); XU54skN //logResponseHead(httpConnection); 93rE5eGs 8;5/_BwMu +l#2u#e byte[] b = new byte[1024]; !`Wu LhB` int nRead; .6hH}BM while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) B?4\IXek { 8BN'fWl&E nStartPos += fileAccessI.write(b,0,nRead); Nf~<xK //if(nThreadID == 1) -Z@p
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O| 2Q-
@D } r5"/EMieh E0|aI4S4 *!Dzst-J3 Utility.log("Thread " + nThreadID + " is over!"); bM'AD[ bDownOver = true; ;Cy@TzO/| //nPos = fileAccessI.write (b,0,nRead); 3m^BYr*y^ } ~:@H6Ke[ catch(Exception e){e.printStackTrace ();} 4j*}|@x } l1??b
} :)z_q!$j B?M+`; y/FisX //打印回应的头信息 )v9[/
]*P public void logResponseHead(HttpURLConnection con) qq`RfZjL { BAhC-;B#R for(int i=1;;i++) M Q6Y^,B { ,y >Na{@Y String header=con.getHeaderFieldKey(i); @K/Ia!Lw if(header!=null) 4|(?Wt)5 //responseHeaders.put(header,httpConnection.getHeaderField(header)); j.6kjQN Utility.log(header+" : "+con.getHeaderField(header)); 2*|]#W else UdGoPzN break; \x!>5Z
Y } LWI~m2 } @FTi*$Ix D)_Ei'+*l dd$N4& public void splitterStop() V~=)#3]`[ { y AWDk0bx bStop = true; Yx"z&J9p } --9mTqx I%p#E#[G qj1z>,\ } X=3@M_Jzo ZeeuH"A |(%H O@i /* )>fi={!=c **FileAccess.java e-VLU; *//文件访问(定位,写) !r|X6`g package NetFox; j#& import java.io.*; >=V+X"\Z ZwMw g t a3;.{6el)H public class FileAccessI implements Serializable{ H[D/Sz5` ]c)SVn$6 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 BGX@n#: RandomAccessFile oSavedFile; }]I?vyQ#V long nPos; )hug<D *h #*!$!c{ 0REWbcxd" public FileAccessI() throws IOException K>[H@|k\k
{ GHy#D]Z this("",0); `y}d)"! } q8Dwu3D i7rq;t< 9QMn%8=j public FileAccessI(String sName,long nPos) throws IOException ))`Zv=y" { 9^u?v`!
oSavedFile = new RandomAccessFile(sName,"rw"); qN@a<row&~ this.nPos = nPos; o!~bR
oSavedFile.seek(nPos); to3J@:V8e } d<'xpdxc A-5+# +&OqJAu public synchronized int write(byte[] b,int nStart,int nLen) Q(UGwd1 { S F>D:$a int n = -1; .jp]S4~ try{ \#aVu^`eX oSavedFile.write(b,nStart,nLen); ?^~"x.<nr n = nLen; E0Q"qEvU } R(sM(x5a` catch(IOException e) 0?SLRz8 { Jdn*?hc+ e.printStackTrace (); d 4]%Wdvf } g5Rm!T+@I< s{e(- 7' Ug21d42Z4 return n; $)Yo g]} } 3Mx@ ]%|WE QIK73^ } pGY]VwY 7X(]r1-+\ :OCuxSc%5 /* \'Ta8 **SiteInfoBean.java zU~..;C */ <im<(=m9 package NetFox; M"^Vf{X^ 5vft}f @@83PJFid public class SiteInfoBean { _wNPA1q0J b`W*vduf |*KS<iHr% private String sSiteURL; //Site's URL P]"deB| private String sFilePath; //Saved File's Path P/Kit?kngS private String sFileName; //Saved File's Name hFMst%:y$ private int nSplitter; //Count of Splited Downloading File V:BX"$J1 nud=uJ"( iIaT1i4t. public SiteInfoBean() ex\W]5 {//nSplitter的缺省值为5 H@E ")@92 //default value of nSplitter is 5 _}OJPahw this("","","",5); GQ2PmnV+ } @b\ S. .vS6_ 1?|6odc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) b$O_L4CP { 9K':Fn2, sSiteURL= sURL; lt6;*z[ sFilePath = sPath; UZP6x2:= sFileName = sName; ;#s}b1 this.nSplitter = nSpiltter; liqR#<
iN_D8dI =5~F6to } _1<'"u#6w ,|X+/|gm 3g[j%`k public String getSSiteURL() p*`SGX { ^Opy6Bqb return sSiteURL; neh;`7~5@K } H:-A; f!Z x$GsDV xDJ+BQ<1A public void setSSiteURL(String value) l(#ke { Hpi%9SAM sSiteURL = value; `n`"g<K)Q } oD#>8Aw s @f{_=~+ 8ts+'65|F public String getSFilePath() vA"niO { RP,:[}mPl return sFilePath; H [Lt%:r
} ouVjZF@kS ;,=h59` F|?'9s*;6G public void setSFilePath(String value) :e]9T3Q { pp]_/46nN sFilePath = value; +K%pxuVh } pzq;vMr {HHh.K eKVALUw public String getSFileName() w,Zx5bBg% { 0<@KDlF return sFileName; dA1
C)gLi } dHG Io 8b:clvh &.Latx public void setSFileName(String value) )p<fL { AB"1(PbG sFileName = value; ZSPgci } W 9Vz[ *el(+ib% yYToiW * public int getNSplitter() n<?SZ^X{,/ { sr+gD*@h return nSplitter; #_?TIY:h }
dGsS<@G 3X$Q, iog #
, public void setNSplitter(int nCount) 8jggc#. { 5,
-pBep< nSplitter = nCount; wI!
+L&Q } t0e{|du } M_h8#7 {G U.RW4df%E lMBX!9z /* \ I^nx+l **Utility.java W ""*hJ */ O[IR| package NetFox; q*[!>\Z8 19F ;oFp N )zPxQ public class Utility { U['JFLF T2DF'f3A Yz=h"Zr public Utility() /WgPXE B { =Y&9
qt ?aFr8i:)M BFMS*t` } 5[,+\ 0{?:FQ# //线程睡眠 <E>7>ZL public static void sleep(int nSecond) 5=Kq@[(4 { C}mYt/ try{ eC6>yD6D Thread.sleep(nSecond); Y^R?Q' } {gFAvMj# catch(Exception e) %/l-A
pu { 'y4zBLY e.printStackTrace (); g.I(WJX0 } -ca7x`yo } .[T'yc:= EkJVFHfh //日志 nW|'l^& public static void log(String sMsg) |} K { E?Zb~xk System.err.println(sMsg); +65oC x
} \G$QNUU @[MO,J&h kS B public static void log(int sMsg) VK2@2`$ { [D3+cDph System.err.println(sMsg); v:rD3=M- } 6exI_3A4jh } YBX)eWslK (U|)xA]y! XC|*A$x, /* |',M_
e] **TestMethod.java m`hGDp3 */ f).*NX package NetFox; CifA,[l34 x3Nkp4=Xd 4|[<e-W public class TestMethod { TC qkm^xv NWEhAj<w 7\IL public TestMethod() tNK^z7Dm { ///xx/weblogic60b2_win.exe oW0gU?Rr)u try{ vO\:vp4fH SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7\mDBG //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :?HSZocf SiteFileFetch fileFetch = new SiteFileFetch(bean); %'N$lF"] fileFetch.start(); ,H>W:O } XZ.7c{B< catch(Exception e){e.printStackTrace ();} wJ6_I$> :qxm !P RX:R*{]- } -Q6(+(7_| 9khjwt {!L=u/qs" public static void main(String[] args) vR7ct av { xEjx]w/& new TestMethod(); U+-F*$PO+ } Pp,Um( } mge#YV:: 点击下载更多相关资料
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