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/* h 'F\9t **SiteFileFetch.java y,`SLgBID */ +$YluGEJ package NetFox; y_=},a import java.io.*; 6tBh`nYB= import java.net.*; MJ)aY2 u{-J?t&` jnl3P[uQ public class SiteFileFetch extends Thread { kh'R/Dt xfE:r: (Es0n$Xb SiteInfoBean siteInfoBean = null; //文件信息Bean N>'T"^S/ long[] nStartPos; //开始位置 d1`us G" long[] nEndPos; //结束位置 B-<H8[GkG1 FileSplitterFetch[] fileSplitterFetch; //子线程对象 `XJU$c long nFileLength; //文件长度 9?
#pqw boolean bFirst = true; //是否第一次取文件 jo-qP4w boolean bStop = false; //停止标志 c-2##Pf_8O File tmpFile; //文件下载的临时信息 ft"B, DataOutputStream output; //输出到文件的输出流 ftqi >^i 2bB&/Uumsd //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <~[A public SiteFileFetch(SiteInfoBean bean) throws IOException Q0}Sju+HX { YMSA[hm siteInfoBean = bean; wd/"! A4( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5 GP,J,J tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h zh%ML3L if(tmpFile.exists ()) %:P&!F\? { d4h,
+OU bFirst = false; 6uU2+I read_nPos(); TzCNY@y } m),3J4(q else BAq@ H8*B { 3+%c*}KC~ nStartPos = new long[bean.getNSplitter()]; "2}E ARa nEndPos = new long[bean.getNSplitter()]; #^>5,M2 } dh~+0FZ{A tWNz:V !]W}I 5jpb`Axj# } f/r@9\x (mOUbO8 >|Hd*pg)) public void run() Gj.u/l { "uz}`G~O //获得文件长度 ZkyH<Aa //分割文件 }538vFNi //实例FileSplitterFetch 4mG?$kCN //启动FileSplitterFetch线程 kc3dWWPe //等待子线程返回 PuuO2TZ try{ =]OG5b_-Y if(bFirst) kO]],Vy` { @y (9LSs
nFileLength = getFileSize(); 6<h?%j( if(nFileLength == -1) v\Y362Xv { 6%K,3R-d System.err.println("File Length is not known!"); !;YmLJk;hN } PLi [T4u else if(nFileLength == -2) nJ.<yrzi { %CxrXU System.err.println("File is not access!"); S}=euY'i } .H,wdzg) else `XwFH#_ { %lw!4Z\gg for(int i=0;i<nStartPos.length;i++) S
z3@h" { FQbF)K~e nStartPos = (long)(i*(nFileLength/nStartPos.length)); +$eEZ;4 } Yxal% for(int i=0;i<nEndPos.length-1;i++) xp395ub6 { .@Z-<P" nEndPos = nStartPos[i+1]; 8?lp:kM } UqaLTdYG nEndPos[nEndPos.length-1] = nFileLength; %n3lm(-0U } m17H#!` } {%S>!RA "g)@jqq:> p&nIUx" //启动子线程 g,5r)FU` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; qL6Rs for(int i=0;i<nStartPos.length;i++) u0;FQr2 { xZ*.@Pkr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y5}<7s\UDO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tFvc~zz9 nStartPos,nEndPos,i); Zhl}X!:c?\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \\F@_nB,b fileSplitterFetch.start(); a'LM6A8~x } MY zyg // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N5ityJIgQ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [dje!5Dc( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", A6APU><dm^ nEndPos = " + nFileLength); tN'-4<+ // fileSplitterFetch[nPos.length-1].start(); p/|":(U Z|YiYQl[) A9_)} //等待子线程结束 j5*W[M9W //int count = 0; ;:JTb2xbb //是否结束while循环 v2>.+Eh# boolean breakWhile = false; pPUv8, % HWFI6N 87P.K Yy while(!bStop) lNcXBtwK@# { 2=3pV!)4} write_nPos(); IK%fX/tDyc Utility.sleep(500); =?U"#a breakWhile = true; QU/Q5k D8otUDB{ T@PtO"r for(int i=0;i<nStartPos.length;i++) WXqrx*?*+ { uTNmt] if(!fileSplitterFetch.bDownOver) ;?/v}$Pa { Ou~|Q&f' breakWhile = false; qB`zyd8yu break; VU1;ZJE } KGCm@oy } }MKm>N if(breakWhile) k<xiP@b{y break; 4{Vw30DZ 6e1/h@p\7 %4:tRF //count++; o|\0IG(\ //if(count>4) ?QGAiu0 // siteStop(); \de824 } JzA`*X[ IfHB+H
/n=
%# { System.err.println("文件下载结束!"); iyw"|+ } (>THN*i catch(Exception e){e.printStackTrace ();}
WH F>J } Fg8i}
>w Jsee8^_~ ^c1%$@H //获得文件长度 |k~\E|^ public long getFileSize() \29a@ 6 { =]h 5RC int nFileLength = -1; }(AgXvRq try{ #un#~s
7Q URL url = new URL(siteInfoBean.getSSiteURL()); M6E.!Cs HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @Oe!*|?mS httpConnection.setRequestProperty("User-Agent","NetFox"); Py$*c 5gP#V
K `nA_WS int responseCode=httpConnection.getResponseCode(); U88-K1G if(responseCode>=400) YYDLFtr2 { m2[q*k]AtS processErrorCode(responseCode); v~>^c1: return -2; //-2 represent access is error =F2e*?a3 } FL5u68 -DwqoWZ e[fzy0 String sHeader; sidSY8j ar.w'z 7dl]f#uZU for(int i=1;;i++) Fx']kn9 { ^E&':6( //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); FHVZ/ e //Utility.log(in.readLine()); @,i_
KN6C sHeader=httpConnection.getHeaderFieldKey(i); o/EA%q1 if(sHeader!=null) 8UArl3 { ,5" vzGLJ if(sHeader.equals("Content-Length")) = :rR%L!a { /[YH
W] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1<_i7.{k break; 7_ g}t!b` } p:u?a, p } o0Qy?14T- else "=I
ioY break; "J(#|v0 } 1_uq46 }
'ypJGm catch(IOException e){e.printStackTrace ();} !n4p*<Y6 catch(Exception e){e.printStackTrace ();} dxlaoyv: BgLK}p^ cCN[c)[c| Utility.log(nFileLength); z5Hz-. c;l
d N<ww&GXBX return nFileLength; O.S(H1z<G } j;eR9jI$T SEQ
bw](ss EeWCy5W //保存下载信息(文件指针位置) /)?]vKMiI private void write_nPos() )|f!}( p { dV#h~ try{ eS9/-Y output = new DataOutputStream(new FileOutputStream(tmpFile)); S5]rIcM output.writeInt(nStartPos.length); s<x2*yVUA for(int i=0;i<nStartPos.length;i++) ?}y?e}y*xZ { uN V(r" // output.writeLong(nPos); pulE6T7x output.writeLong(fileSplitterFetch.nStartPos); CZg$I&x output.writeLong(fileSplitterFetch.nEndPos); h0`@yo
} uZ*;%y nQ output.close(); Ro`Hm8o/ } nb0V~W catch(IOException e){e.printStackTrace ();} qCOe,$\1/ catch(Exception e){e.printStackTrace ();} G@b|{! } bWAhK@epI k0.|%0?K dC;@ Fn //读取保存的下载信息(文件指针位置) - xtj:UO private void read_nPos() Hw[u Sv8 { L!:} try{ 8)3g!3S DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); g83]/s+ int nCount = input.readInt(); x7 jE
Ns ) nStartPos = new long[nCount]; e"P>b? OY nEndPos = new long[nCount]; :a(er'A for(int i=0;i<nStartPos.length;i++) ^yiRrcOo { W>036 nStartPos = input.readLong(); c*ac9Y'o nEndPos = input.readLong(); G (Fi } %c)^8k;I input.close(); k_.%(ZE } GMRw+z4 catch(IOException e){e.printStackTrace ();} k8w }2Vw catch(Exception e){e.printStackTrace ();} !]7r>NS> } '"Q;54S** 5
rkIK W\gu"g`u private void processErrorCode(int nErrorCode) hkeOe { jI!}}K)d System.err.println("Error Code : " + nErrorCode); W#E-vi+l } -4{sr|
lm jV`xRjh dX-Xzg //停止文件下载 7*]O]6rP public void siteStop() ;muxIr`? { ,Hn{nVU1R= bStop = true; 5O<7<OB for(int i=0;i<nStartPos.length;i++) }6MHIr=o fileSplitterFetch.splitterStop(); j-@3jFu h^eaV,x>= .zO/8y(@ } EE5I~k5 } GV'Y' //负责部分文件的抓取 I|]~f[xI **FileSplitterFetch.java 'v iF8?_ */ XhjH68S( package NetFox; ~#+ Hhc( h-<2N)>! <m:8%]%M6 import java.io.*; fF37P8Ir import java.net.*; AdDlS~\? XOK.E&eilj =n|n%N4Y public class FileSplitterFetch extends Thread { jFfuT9oId Qvt ["VUSa String sURL; //File URL yUcWX bT@ long nStartPos; //File Snippet Start Position /pni_-l* long nEndPos; //File Snippet End Position `MtI>x
c int nThreadID; //Thread's ID *^+8_%;1 boolean bDownOver = false; //Downing is over F3j#NCuO=z boolean bStop = false; //Stop identical |9cJO@ FileAccessI fileAccessI = null; //File Access interface }_m/3*x_ ]Gm"U!h* LRl2@&z< public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ikd~ k>F { Oo<L~7B this.sURL = sURL; 7kJ =C this.nStartPos = nStart; luAmq+ this.nEndPos = nEnd; V*HkFT nThreadID = id; w4w[qxV> fileAccessI = new FileAccessI(sName,nStartPos);//定位 GqB]^snh } R+Q..9P >.^/Z/[.L H0tjBnu
public void run() ~kM# lh7At { J_) .Hd while(nStartPos < nEndPos && !bStop) d2f
{ Bbk=0+ ^8I a(-
^ .w C{7
j<O try{ _qwKFC URL url = new URL(sURL); X}Heaqn HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /, T@/ httpConnection.setRequestProperty("User-Agent","NetFox"); uR#aO'' String sProperty = "bytes="+nStartPos+"-"; @}sxA9a httpConnection.setRequestProperty("RANGE",sProperty); eiE36+'>b Utility.log(sProperty); zi M~V' 0 ~2~^A#]\ 0 8*bYJu InputStream input = httpConnection.getInputStream(); t;g=@o9YA //logResponseHead(httpConnection); <49Gsm&0 M}Sn$h_ S[g{
)p) byte[] b = new byte[1024]; hfzmv~* int nRead; |Et8FR3[m while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) \/E+nn\) { M'gw-^( nStartPos += fileAccessI.write(b,0,nRead); A#/O~-O^ //if(nThreadID == 1) );-?~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AG?cI@', } S+aXlb ;jC}.]
_)w 4O}ZnE1[ Utility.log("Thread " + nThreadID + " is over!"); t.0F bDownOver = true; ^lADq'] //nPos = fileAccessI.write (b,0,nRead); xz5V. } XNODDH catch(Exception e){e.printStackTrace ();} `<}Q4p } dV_ClH &) } ECq(i( _J' _9M?> Vu6$84>-, //打印回应的头信息 Y|%s =0M public void logResponseHead(HttpURLConnection con) F\LAw#IJ { =QG@{?JTl for(int i=1;;i++) QnHb*4< { ry^FJyjW String header=con.getHeaderFieldKey(i); "9Q @&C if(header!=null) OUo N //responseHeaders.put(header,httpConnection.getHeaderField(header)); y; oPg4 Utility.log(header+" : "+con.getHeaderField(header)); :zN{>,sC else XEK% \o} break; of? hP1kl[ } K9\p=H^T7 } }.+{M.[} $Sz@u"ig% fjD/<`}v public void splitterStop() YVSAYv_ZG} { ~<
~PaP$=\ bStop = true; -|Z[GN: } #j!RbW OFc Lh nd~cpHQR^ } LmCr[9/ &d5n_:^
K=S-p3\g /* !'yCB9]O **FileAccess.java VTM*=5|c *//文件访问(定位,写) /=o~7y package NetFox; }q8|t3 import java.io.*; G)<NzZo x?5D>M/Y 4gyC?#Ede public class FileAccessI implements Serializable{ D7v-+jypp }bkQr)us //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Vp"=8p#k RandomAccessFile oSavedFile; \L6kCY long nPos; "e)C.#3 b-'T>1V k&oq6!ix public FileAccessI() throws IOException o p{DPUO0 { NoSq:e this("",0); |DB7o+4 } i!AFXVX */8b)I}yY ]6)~Sj$ 5 public FileAccessI(String sName,long nPos) throws IOException Ev%_8CO4e { k4@$vxy0 oSavedFile = new RandomAccessFile(sName,"rw"); yaDK_fk this.nPos = nPos; kK62yz, oSavedFile.seek(nPos); <in#_Of{E } G0e]PMeFl 06)B< q 4Rvr[ public synchronized int write(byte[] b,int nStart,int nLen) 1$+-?:i C { CP5vo-/)- int n = -1; x-hr64WFK try{ QYS 1.k oSavedFile.write(b,nStart,nLen); zc1y)s0G n = nLen; Y.7iKMp( } qwf97pg$ catch(IOException e) PM(M c]6 { AbqeZn e.printStackTrace (); pgp@Zw)r)k } %1\MW+ "W"2Y( \ytF@"7 return n; F\K&$5J{p } t@ _MWF =qg;K'M5 ?.*^#>- } 84X/=l-c= goJK~d8M* Xc>M_%+R
/* VuU{7: **SiteInfoBean.java %I`%N2ss */ ?QbxC,& i package NetFox; 0Z11V9Jk @N(*1,s2 NQ9/,M public class SiteInfoBean { cN?}s0 T_=IH~" SJ
ay private String sSiteURL; //Site's URL t_Q\uo} private String sFilePath; //Saved File's Path ~_XK<}SK private String sFileName; //Saved File's Name h?D>Dfeg% private int nSplitter; //Count of Splited Downloading File $vC}Fq &/\Q 6$a l-mt{2 public SiteInfoBean() 1xf
Pe# {//nSplitter的缺省值为5 )XFaVkQ} //default value of nSplitter is 5 I1Jhvyd?$ this("","","",5); 6Fe$'TP } `!um)4 i 6DcLE ntZl(] l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ru>c\X^| { #Yd'Vve sSiteURL= sURL; bJWPr sFilePath = sPath; L-,C5^ sFileName = sName; uOv0ut\\G this.nSplitter = nSpiltter; :(?F(Q^ Y!1x,"O'H =Z(_lLNmh } H1fKe=$1 cYeC7l" DI)!x {" public String getSSiteURL() X<8 { O8mmS! return sSiteURL; O]1aez[ } -Uj3?W ) 8_x 1SwKd*aRR? public void setSSiteURL(String value) phc9esz { JNx;/6'd, sSiteURL = value; 3~ptD5@WF } nf2[hx@=U $xK*TJ(k
|jhu public String getSFilePath() m\DI6O"u' { \Ctl(uj return sFilePath; UXdnN;0 } F, 39'<N[ -ld1o+'`v! jqJ't)N public void setSFilePath(String value) #Aver]eK { H[e=^JuD sFilePath = value; `^G?+p2E } >OotgJnhC {Y6;/".DM nX>HRdC public String getSFileName() u]$e@Vw. {
!\hUjM+(} return sFileName; vFx0B? } 0)0,&@])7 I%b}qC"5M 6E))4
lW public void setSFileName(String value) D\LXjEme. { P: QSr8K sFileName = value; <?E~Qc t } Oe_*(q& `%<^$Ng; ~6!TMVr public int getNSplitter() 5f-eWW]! { tXg>R _\C return nSplitter; L
Rn) } mNDd>4%H_ CYHo~VIK g54b}vzm public void setNSplitter(int nCount) y yqya[-11 { Kd|@ nSplitter = nCount; >J['so2Bf } s+@`Z*B5 } &~&nJr av:9kPKm `;v5o4.` /* T@?uA*J **Utility.java XR@C^d */ Wu|ANc package NetFox; 1c19$KHu abw7{%2 L^%jR= public class Utility { LO@='}D= ,5Nf9z!hk( P7|x=Ew;` public Utility() b!gvvg< { g7g^iLU -8%[7Z] a`E1rK' } =&-+{txs iRsK;)< //线程睡眠 '^ob3N/Y [ public static void sleep(int nSecond) xL#UMvZ>;h { +/|t8z FWs try{ V'm4DR#M Thread.sleep(nSecond);
}0f"SWO> } svj0;x5 catch(Exception e) u~7
,v { ~Kll. e.printStackTrace (); ) |Md"r_B } d>k"#| } >oasA2S t{g7 :A //日志 >21f%Z public static void log(String sMsg) n~C!PXE { 3{ FUFx System.err.println(sMsg); En:/{~9{F } |9x H9@^f >og-
jz 0hoi=W6AQ public static void log(int sMsg) q-5U,!!W/ { E,$5V^
9 System.err.println(sMsg); +S
C;@' } $`'Xb } Y!*F-v@ k:sFI @g U_l#lGA(H /* *-lw2M9V **TestMethod.java "&{sE RYY */ am(jmf:: package NetFox; ]<g`rR7} vC|V8ea us$=)m~v+ public class TestMethod { 's7 (^1hH {6Qd,CX ! 1wf/C;= public TestMethod() I]vCra { ///xx/weblogic60b2_win.exe (n
{,R try{ hY[Vs5v SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); L.R4 iN //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Bq*aP*jv SiteFileFetch fileFetch = new SiteFileFetch(bean); #}|g8gh fileFetch.start(); V0/O
T~gS8 } qdY*y&}"J catch(Exception e){e.printStackTrace ();} na-mh
E,H %wk3&EC. MFqM6_ } /KLs+^c5 9n!IdqKN }n[<$*W^ public static void main(String[] args) k%2Rv4)hU { 2GW.'\D new TestMethod(); OHyBNJ } ^!yJ;'H\ } } Rs@ 点击下载更多相关资料
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