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/* N{q'wep **SiteFileFetch.java yNDyh */ u8W*_;%: package NetFox; $ o t"Du import java.io.*; "RShsJZMH import java.net.*; tNUcmiY VJ$C)0xQA T\WNT#My public class SiteFileFetch extends Thread { #Se /=3g-$o{` M,#t7~t SiteInfoBean siteInfoBean = null; //文件信息Bean q7)$WXe2LM long[] nStartPos; //开始位置 _c(=> long[] nEndPos; //结束位置 '<}7bw}+c FileSplitterFetch[] fileSplitterFetch; //子线程对象 !^LvNW\| long nFileLength; //文件长度 .K7A!; boolean bFirst = true; //是否第一次取文件 cX=` Tl boolean bStop = false; //停止标志 C>03P.s4c File tmpFile; //文件下载的临时信息 C>MoR 3] DataOutputStream output; //输出到文件的输出流 22*t%{( k|lxJ^V# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?"C]h s public SiteFileFetch(SiteInfoBean bean) throws IOException \E#r[9F{ { !
\gRXP} siteInfoBean = bean; oqY?#p/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); vc!S{4bN tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Wh<lmC50( if(tmpFile.exists ()) _Ng*K]0/E { rxz3Mqg bFirst = false; <r\)hx0ov read_nPos(); siG?Sd_2 } ,
m\0IgZdz else C )I"yeS. { CTI(Kh+ nStartPos = new long[bean.getNSplitter()];
K8+b\k4E nEndPos = new long[bean.getNSplitter()]; lZua"Ju } c]"B)I1L %-*vlNC ) *K98z ? 5m bs0GL } ,AD| u_pP M\<!m^~ HaC3y[ LJ0 public void run() B`WfJ2*2 { q#778 //获得文件长度 pvM8PlYo]` //分割文件 yk5P/H) //实例FileSplitterFetch .ClCP?HG //启动FileSplitterFetch线程 2$Ji4`p}S //等待子线程返回 njX:[_& try{ E:o:)h?$ if(bFirst) yd%\3}- { /~^I]D nFileLength = getFileSize(); ?I0 i%nH if(nFileLength == -1) SB'YV#-- { BJq}1mn* System.err.println("File Length is not known!"); A8RT3OiXA } (gf\VYM-7 else if(nFileLength == -2) FEZ6X { KGWENX_U System.err.println("File is not access!"); @uE=)mP@ } B~aOs>1
S] else I[`2MKh { !Q3Snu= for(int i=0;i<nStartPos.length;i++) ChW0vIL` { ?rOb?cu- nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~pA;j7* } YBCjcD[G for(int i=0;i<nEndPos.length-1;i++) %<"11;0tp { qB39\j nEndPos = nStartPos[i+1]; LAKZAi%O0 } ^kD?0Fm nEndPos[nEndPos.length-1] = nFileLength; ^VIUXa } G9a%N } M"vcF5q pkU e|V u7C{> //启动子线程 Hb+#*42v fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]dK]a:S for(int i=0;i<nStartPos.length;i++) rO`g~>- { *0hiPj: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (XwLKkw0n siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uy9B8&Sr nStartPos,nEndPos,i); IX*S:7S[ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )e2IT*7 fileSplitterFetch.start(); `p{!5 } vg.%. ~!9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -5cH$]1\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); cMWO_$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", qQcC[50 nEndPos = " + nFileLength); eq+o_R}CS // fileSplitterFetch[nPos.length-1].start(); }J?fJ( I:_*8el&d Q Bw
ZfX //等待子线程结束 \l:g{GnoT //int count = 0; 0xxzhlKNL //是否结束while循环 A]+h<Y~} boolean breakWhile = false; @NNLzqqY >h[!gXL^ N
Sh.g# while(!bStop) B
R:
{ xs I/DW write_nPos(); mCt>s9a)H Utility.sleep(500); 7L+X\oaB breakWhile = true; BXo|CITso Qkib;\2 Wh Zaq for(int i=0;i<nStartPos.length;i++) ?Bzi#Z { tvOAN|+F if(!fileSplitterFetch.bDownOver) G; [AQ:Iy { UBi4 itGD breakWhile = false; $vLV<
y07 break; ,/:a77 } bQy%$7UmX, } P082.:q" if(breakWhile) `zp2;]W break; MH.,s@ hu|hOr8 YU=ZZEVi //count++; $uw+^(ut //if(count>4) E)JyKm. // siteStop(); ^B5cNEO } 6lWFxbh e^NEj1 NoO+xLHw8 System.err.println("文件下载结束!"); 1mJ_I|98 } uvDoo6' catch(Exception e){e.printStackTrace ();} H 1D;:n } '
f$L 2]3HX3 MgQU6O< //获得文件长度 "-n%874IT public long getFileSize() ~J-|,ZMd { 5;
PXF int nFileLength = -1; b_jZL'en try{ eqZ+no URL url = new URL(siteInfoBean.getSSiteURL()); &U~r}= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !Gp3/<"Wy$ httpConnection.setRequestProperty("User-Agent","NetFox"); _`_IUuj$E jN%p5nZ^EK 7vaN&%;E% int responseCode=httpConnection.getResponseCode(); &@HNz6KO if(responseCode>=400) ix9HSa{d { <i'u96 processErrorCode(responseCode); mp,e9Nd; return -2; //-2 represent access is error N+M&d3H` } f4k5R ;(Xe@OtW `MsYgd String sHeader; >I&
jurU# @qPyrgy
NVJ&C]H6 for(int i=1;;i++) N
2"3~ # { W/r mm* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); uR;-eK //Utility.log(in.readLine()); 48CI8[T sHeader=httpConnection.getHeaderFieldKey(i); T5azYdzJy if(sHeader!=null) QG|GXp_q` { zZ9<4"CIk if(sHeader.equals("Content-Length")) 9*|3E"Vr { hY}/Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); v0C;j(2zb break; ?JgO-. } #t@x6Vt } d{yIy'+0/ else )4~sQ^} break; >4/L-y+ } :@ E1Pun? } qggk:cN1 catch(IOException e){e.printStackTrace ();} Dk`4bYK catch(Exception e){e.printStackTrace ();} }@14E-N= ;}WtJ&y=M P-+M,>vNy[ Utility.log(nFileLength); ZS XRzH~0 lU$4NUwM FKox0Jmh= return nFileLength; /> 3 } KR=d"t Qw 2]D$|M?$~ 'cZMRRc< //保存下载信息(文件指针位置) =zm0w~']E! private void write_nPos() V3mjbH>F { ;tp]^iB# try{ S\9t4Ki_' output = new DataOutputStream(new FileOutputStream(tmpFile)); @0z0m;8 output.writeInt(nStartPos.length); @fqV0l!GR for(int i=0;i<nStartPos.length;i++) I
f3{E { WQ[}&kY~ // output.writeLong(nPos); +_X,uvR output.writeLong(fileSplitterFetch.nStartPos); ,g/ _eROJ output.writeLong(fileSplitterFetch.nEndPos); G#w^:UL } zg#m09[4 output.close(); f6B-~x<l } \\S/NA catch(IOException e){e.printStackTrace ();} dK}WM46$ catch(Exception e){e.printStackTrace ();} #0bO)m+NZ } oWp}O? ZU|6jI} .?rbny //读取保存的下载信息(文件指针位置) _ }E-~I> private void read_nPos() StU 4{ { +Y>"/i.
N try{ [eNkU">} DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :8^M5} int nCount = input.readInt(); _8Nw D_" nStartPos = new long[nCount]; ~h)@e\Kc nEndPos = new long[nCount]; 6?V<BgCC for(int i=0;i<nStartPos.length;i++) ]C16y.
~e { ;&Bna#~B nStartPos = input.readLong(); U*3AM_w nEndPos = input.readLong(); R:'Ou:Mh } sI&i{D input.close(); xF(
bS+(o } x&C%4Y_] catch(IOException e){e.printStackTrace ();} 6<x~Mk'u) catch(Exception e){e.printStackTrace ();} `DLp<_z>
}
qH#r- zoZ<)x=; ic*->-! private void processErrorCode(int nErrorCode) erx5j\ { ~;M)qR?]W System.err.println("Error Code : " + nErrorCode); 5Vp;dc } JEWL) 3CR@'
qG- ;,1=zhKU. //停止文件下载 4_PCqEp) public void siteStop() pOC% oj { f64(a\Rw!^ bStop = true; Fe!D%p Qv for(int i=0;i<nStartPos.length;i++) ^WE4*.( fileSplitterFetch.splitterStop(); YD&|1h _u&>&,:q %#~((m1 } I=K!)X$ } NO-k- //负责部分文件的抓取 10wvfRhng **FileSplitterFetch.java q7X}MAW */ r&}(9Cq&"y package NetFox; U1ZIuDg'E \6{krn| qysTjGwa] import java.io.*; iI5+P`sE&J import java.net.*; fUC9-?(K L0rip5[;d &V'519vmoZ public class FileSplitterFetch extends Thread { CuH2E>wz !fY7"E{%% ypx: )e"/ String sURL; //File URL 9O;cJ)tXY long nStartPos; //File Snippet Start Position 4/S=5r} long nEndPos; //File Snippet End Position Hd9XfU int nThreadID; //Thread's ID Ju!(gh boolean bDownOver = false; //Downing is over z{9=1XY boolean bStop = false; //Stop identical M)&Io6>
FileAccessI fileAccessI = null; //File Access interface ? ^M
/[@ ! Tx&vtq TZ[Zm public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bS.s?a { 4&QUh+F this.sURL = sURL; [J^ this.nStartPos = nStart; 5W/{h q8}} this.nEndPos = nEnd; -LtK8wl^ nThreadID = id; <,"4k&0Q>V fileAccessI = new FileAccessI(sName,nStartPos);//定位 +`@M*kd } q:I$EpKf?Q HPg3`Ul 8S\RN&T$ public void run() oM!xz1kVL { :.kZR; while(nStartPos < nEndPos && !bStop) 0}{'C5 { vw2`:]Q+ {_?rh,9q H`~;|6}]n try{ ! QM.P
t7c URL url = new URL(sURL); j~;;l!({i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hoa7 httpConnection.setRequestProperty("User-Agent","NetFox"); H{l) String sProperty = "bytes="+nStartPos+"-"; UXT
p httpConnection.setRequestProperty("RANGE",sProperty); ~C-,G"zw&G Utility.log(sProperty); e ^Ds 'Gx$Bj LxLy+yC#p InputStream input = httpConnection.getInputStream(); !\FkG8 //logResponseHead(httpConnection); B
z^|SkEit "-31'R- T .REq4< byte[] b = new byte[1024]; cvnB!$eji int nRead; %Y]=1BRk} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (D<(6? { #2RiLht nStartPos += fileAccessI.write(b,0,nRead); /kgeV4]zR //if(nThreadID == 1) )KE[!ofD // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {`(>O"_[Q } {o0qUX>[ ^Dg<Ki sV/l5]b] Utility.log("Thread " + nThreadID + " is over!"); O:'?n8rWL bDownOver = true; &$'z //nPos = fileAccessI.write (b,0,nRead); \8S~c8Z~ } Yw'NX5#)g catch(Exception e){e.printStackTrace ();} ).5RPAP } -`+<{NHv\ } BecPT *>NX%by) PRkSQ4 //打印回应的头信息 bDnZcf public void logResponseHead(HttpURLConnection con) %ft &Q { eg/<[ A: for(int i=1;;i++) MP^ d}FL { %c|UmKKi String header=con.getHeaderFieldKey(i); b0v:12q if(header!=null) ;{#^MD MB //responseHeaders.put(header,httpConnection.getHeaderField(header)); /J3ZL[o?Q Utility.log(header+" : "+con.getHeaderField(header)); sa1h%< else \3Pv# ) break; )w h%| } |&3x#1A } P`$!@T0= |TsE-t*E} eS+g| $cW public void splitterStop() >&,[H:Z { ,](:<A)W& bStop = true; _;1}x%4v } >j*;vG5T WIr2{+# 'G&{GVbXY } r%@Lej5+ \f:z+F!6R 7ZxaPkIu&% /* urBc=3Rz **FileAccess.java rH8@69,B *//文件访问(定位,写) &;i
"P package NetFox; ;G |i^ import java.io.*; ^n1%OzGK# 0AK,&nbF "_|oW n public class FileAccessI implements Serializable{ j.e0;!
(L} uo\ .7[1
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >Dw~POMy RandomAccessFile oSavedFile; ^3VR-u <O long nPos; wh6yPVVF/ Q=mI9 _"@CGXu public FileAccessI() throws IOException ` x8J { xu5ia|gYz7 this("",0); j/`94'Y } k%s_0
@ <BFQ: M`YWn ; public FileAccessI(String sName,long nPos) throws IOException ldha|s.* { Tm}rH]F& oSavedFile = new RandomAccessFile(sName,"rw"); XfPFo6 this.nPos = nPos; te|?)j oSavedFile.seek(nPos); d^03"t0O] } N`@NiJ(O; :W#rhuzC >F1kR\! public synchronized int write(byte[] b,int nStart,int nLen) (jjTK'0[ { zGKyN@o int n = -1; C+[%7vF1 try{ YHNR3 oSavedFile.write(b,nStart,nLen); Snp|!e n = nLen; @"a6fn } Y3.$G1{#0w catch(IOException e) X cr
= { <8,o50`B e.printStackTrace (); >r`b_K } dzLQI}89+k \B F*m"lz [B@'kwD\l return n; j/=iMq } CTX9zrY*T XU!2YO)t;! -9N@$+T } S/|,u`g- 4[Z\
?[ f-DL:@crU /* Jk@]tAwoM **SiteInfoBean.java 3 LDS
Z1f */ A.<H>=Z#O package NetFox; H]Hv;fcC We0.3aG r/pH_@ public class SiteInfoBean { V7#v6!7A@ 4BnSqw a_ EA ]+vq private String sSiteURL; //Site's URL f}g\D#`]/ private String sFilePath; //Saved File's Path R_M?dEtE> private String sFileName; //Saved File's Name *I}`dC[ private int nSplitter; //Count of Splited Downloading File
'iLpE7 db'/`JeK
b 4XVCHs( public SiteInfoBean() !.2<| 24 {//nSplitter的缺省值为5 8.F~k~srA //default value of nSplitter is 5 *6HTV0jv this("","","",5); COH<Tj } m/#a0~dB mF` B# KiG p[eb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;&H4u) { z/i+EE sSiteURL= sURL; DN4$Jva sFilePath = sPath; R$; n)_H sFileName = sName; y#}cC+; this.nSplitter = nSpiltter; (&/2\0QV }VDqj}is s4&^D< } zD?oXs y%
:4b@< f~ }H public String getSSiteURL() pp9Zb.D\ { mPq$?gdp return sSiteURL; wAnb
Di{W } 2^?:&1: qI^
/"k*5 n3J53| %v public void setSSiteURL(String value) C6rg<tCH { NcY608C sSiteURL = value; B"%{i-v>** } AT5aDEb^^ % YOndIS: 6e7{Iy public String getSFilePath() *)+ut(x|# { DY[$"8Kxcp return sFilePath; YM5fyv? } y"Nsh>h aL\nT XakX #-h\. #s public void setSFilePath(String value) znJ'iVf { (Vo>e =q sFilePath = value; `5H$IP1XhA } N/GQt\tV< *5xJv (%`QhH public String getSFileName() z
$MV%F { a
^%"7Ri return sFileName; ^{8Gt@ } !+:ov'F iDf,e Kk$' u :F~K public void setSFileName(String value) ]THPSw_y8 { [d* ~@P sFileName = value; _v*
nlc } j)
,,"54* 8/K!SpM*d *28pRvY:b public int getNSplitter() `_&Vt=7lG { RxQh2<? return nSplitter; F4e:ZExJ }
TT-h;'nJ ApjOj/ zq%D/H6J, public void setNSplitter(int nCount) 5aa<qtUjH { j^`hzh3S nSplitter = nCount; (!:cen~|[ } )Z %T27r,^ } JAI)Eqqv] aH#l9kCb bMU(?hb /* z~A]9|/61v **Utility.java ~@kU3ZGJZ */ H)(:8~c,p package NetFox; ;>mCalwj 2}W0
F2* YZ+RWu9K public class Utility { 1 `KN]Nt w;l<[q?_ Q3"}Hl2 public Utility() is/scv< { <EST?.@~+ T\r@5Xv ~/_SMPLo } pa{re,O"e KWWa&[ev) //线程睡眠 1nu^F,M public static void sleep(int nSecond) }@r{?8Ru { Ve
4u +0 try{ mLL340c#\ Thread.sleep(nSecond); 1LJUr"6] } {?`al5Sz catch(Exception e) -@ZiS^l { B7z -7&TE e.printStackTrace (); ^H6<Km
l/V } V=1Bo~ } hxS 6:5Uc R-P-i0~ //日志 ]@Sj`J[fd public static void log(String sMsg) y7^{yS[, { kQ System.err.println(sMsg); Ldn8 } CXCpqcC 5MSB dO ce6__f5? public static void log(int sMsg) C R|lt { EJ`T$JD System.err.println(sMsg); \Y}3cE } mZUfn%QXb( } 3 LdQ]S -Qn=|2Mm? )P|[r /* n k2om$nN **TestMethod.java q5L51KP2 */ vaon{2/I package NetFox; W}|'#nR tbO
H#| [7YPl9 public class TestMethod { IMk'#) ,[A'tUl _ CwX Z public TestMethod() v|E"[P2e { ///xx/weblogic60b2_win.exe 'u` .P:u? try{ { m|pl SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); "4%"&2L //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); *]i!fzI'] SiteFileFetch fileFetch = new SiteFileFetch(bean); 5 Qoew9rA fileFetch.start(); b2@VxdFN } NuU9~gSQ catch(Exception e){e.printStackTrace ();} X(7qZ
P~ (mlzg=szW KeNL0_Pw } oc^Br~ Th Dk5Zh+^ 0D8K=h&e public static void main(String[] args) v<fnB { [NFNzwUB new TestMethod(); wW"z } ,<:!NF9 } 3 R&lqxhg 点击下载更多相关资料
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