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/* YnzhvE **SiteFileFetch.java b!7*bFTt */ AUm"^-@x#> package NetFox; c05kHB$O import java.io.*; .BR2pf|R import java.net.*; Ip0~ Mbua!m(0 /Jjub3>Q public class SiteFileFetch extends Thread { ;|.^_Xs J.r^"K\ PYYK R SiteInfoBean siteInfoBean = null; //文件信息Bean wMB. p2 long[] nStartPos; //开始位置 ?9Eshw2 long[] nEndPos; //结束位置 <GbF4\ue FileSplitterFetch[] fileSplitterFetch; //子线程对象 S~9K'\vO long nFileLength; //文件长度 3:Mq40]x boolean bFirst = true; //是否第一次取文件 w@&4dau boolean bStop = false; //停止标志 _bi]Bpxf File tmpFile; //文件下载的临时信息 %8_bh8g- DataOutputStream output; //输出到文件的输出流 qW1d;pt pu:Ie#xTDf //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (|<e4HfZL public SiteFileFetch(SiteInfoBean bean) throws IOException <,r|*pkhp~ { %MQU&H9[ siteInfoBean = bean; s\k4<d5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H6Mqy}4W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E,S[3 + if(tmpFile.exists ()) 6V"| { 3++}4%w bFirst = false; R aVOZ=^- read_nPos(); hmRnr=2N } =ZE]jmD4P else Df\~ ZWs! { csceu+IA nStartPos = new long[bean.getNSplitter()]; ;#F/2UgHB nEndPos = new long[bean.getNSplitter()]; #mI{D\UR } 5/vfmDt3'G INi9`M.h ~$GRgOn x}Y } A{[joo g[Z$\A?ZbZ B}PT-S1l public void run() )U?Tmh { u3"0K['3 //获得文件长度 ?s=O6D&
//分割文件 Vq'\`$_
//实例FileSplitterFetch *Kpk1 //启动FileSplitterFetch线程 KW* 2'C& //等待子线程返回 {`FkiB` i try{ SXYH#p if(bFirst) yqEX0|V% { X"4 :#s nFileLength = getFileSize(); B-oQ 9[~ if(nFileLength == -1) fgiOYvIS2m { 5`TbM System.err.println("File Length is not known!"); RZ(*%b<C } %h}Q f&U_ else if(nFileLength == -2) TzaR{0
1 { WR&>AOWAD System.err.println("File is not access!"); F/ZB%;O9 } ae1?8man else z n,y'}, { "!ZQ`yl for(int i=0;i<nStartPos.length;i++) HHT_ }_? { R&>G6jZ?8 nStartPos = (long)(i*(nFileLength/nStartPos.length)); <G9HVMiP } .!fhy[%o:D for(int i=0;i<nEndPos.length-1;i++) :y/1Jf'2f { 03ol6y )C nEndPos = nStartPos[i+1]; #ujry.m } J`E,Xw>2 nEndPos[nEndPos.length-1] = nFileLength; `D44I;e^1; } q*L>MV } (Dy6I;S "!V-@F$@N R`[jkJrc //启动子线程 B]KR * fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {iGy@?d)zt for(int i=0;i<nStartPos.length;i++) aVg~/ { Dq [f fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F@8G,$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N('=qp9 nStartPos,nEndPos,i); [>2iz Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s6q6)RD" fileSplitterFetch.start(); I_1(jaY } I7@|{L1|FB // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jR1o<]? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J0ysZ] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", lOp7rW]$ nEndPos = " + nFileLength); Oe)d|6= // fileSplitterFetch[nPos.length-1].start(); &kR*J<)V 8t1XZ S55h}5Y //等待子线程结束 \;!}z3W w //int count = 0; J?wCqA //是否结束while循环 h23"< boolean breakWhile = false; TpAE 9S -w dbH`2Z" e^LjB/<Th while(!bStop) WE{fu{x { XIGz_g;#'w write_nPos(); H*m3i;"4p\ Utility.sleep(500); ~+A(zlYr~ breakWhile = true; -wh?9?W h SeXxSb: ?*zDsQ for(int i=0;i<nStartPos.length;i++) l&/V4V- { GM~Ek]9C% if(!fileSplitterFetch.bDownOver) z#[PTqD-_ { L@5j? N?F breakWhile = false; t)4><22of break; ]<3n;*8k? } HzMr } 9{GEq@`7 if(breakWhile) |erG cKk break; yTxrbE Vk tc )+ V)]dS@% //count++; o=nF .y //if(count>4) qj7}]T_ // siteStop(); &G|^{!p/G } x5(6U>-Y Y&XO:jB 0h=}BCb+i System.err.println("文件下载结束!"); WYUel4Z } ( GW"iL#. catch(Exception e){e.printStackTrace ();} [HEljEv } /E39Z* y}F;~H~P th1;Ym+Ze //获得文件长度 ;!+-fn4C public long getFileSize() %lnVzGP { b9xvLR8 int nFileLength = -1; l(y,lK=YP1 try{ )ZW[$:wA URL url = new URL(siteInfoBean.getSSiteURL()); \ xJ_)r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YMU2^,3 httpConnection.setRequestProperty("User-Agent","NetFox"); %/4_|.8u ]vflx^<? xZ]QT3U+ int responseCode=httpConnection.getResponseCode(); +n%d,Pz if(responseCode>=400) @DNwzdP { Y#5v5
processErrorCode(responseCode); IAHQT<] return -2; //-2 represent access is error Hl#?#A5 } T,oZaJ< *mJ\Tzc) 64L;np> String sHeader; f<{f/lU@ 2oF1do; Dr)jB*yK for(int i=1;;i++) i'QR-B&Z { .iC!Ttr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N/!(`Z, //Utility.log(in.readLine()); ]$,3vYBf sHeader=httpConnection.getHeaderFieldKey(i); oF~+L3&X if(sHeader!=null) :4r{t?ytXw { |ms. if(sHeader.equals("Content-Length")) lhC^Upqw { GJ{XlH nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); I&6M{,rnM break; r;9 V7C } {4$aA* } Q!!u=}GYK else %a?\y_a=b break; n)j0h- } I
6'!b/ } p/qu4[Mm catch(IOException e){e.printStackTrace ();} P6I<M}p catch(Exception e){e.printStackTrace ();} (!PsK:wc
%g~&$oZmq sU+8'&vBp Utility.log(nFileLength); 0v,fY2$c zM(-f|wVI) 8OMMV,QF return nFileLength; AQ?;UDqU } nMJ(tQ f5Hv![x >"+ho //保存下载信息(文件指针位置) 5\EnD,y private void write_nPos() R,s}<N$ { r1Hh @sxn try{ lWn}afI output = new DataOutputStream(new FileOutputStream(tmpFile)); 6V"uovN2 output.writeInt(nStartPos.length); T/.U Mw for(int i=0;i<nStartPos.length;i++) O^!Bc}$
{ "D'rsEh // output.writeLong(nPos); !9{hbmF# output.writeLong(fileSplitterFetch.nStartPos); )MF 4b][ output.writeLong(fileSplitterFetch.nEndPos); :-WNw
n } 2q(gWhcj output.close(); }4T `) } yk'L_M(= catch(IOException e){e.printStackTrace ();} sYfm]Faz catch(Exception e){e.printStackTrace ();} )vUS). ;S` } VJP # JeN]sK)8x %
H<@Y$r //读取保存的下载信息(文件指针位置) &Dt=[yqeG private void read_nPos() m] yUcj{F { .^2.h try{ ZXN`8!]& DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <5"&]!
. int nCount = input.readInt(); &8pGq./lr= nStartPos = new long[nCount]; +_{cq@c nEndPos = new long[nCount]; { P,hH~! for(int i=0;i<nStartPos.length;i++) %gQUog { V'gJtF nStartPos = input.readLong(); lQiw8qD nEndPos = input.readLong(); &Z3%UOY } 8f1M6GK? input.close(); Bd 0oA
)i } kBLFK3i catch(IOException e){e.printStackTrace ();} 6"o=`Sq catch(Exception e){e.printStackTrace ();} c&P/v#U_ } 1V9A nzwX E=CA Wj\ s)fahc(@E private void processErrorCode(int nErrorCode) k<P` { *~YdL7f)J System.err.println("Error Code : " + nErrorCode); /CH]'u^j } a0+q^*\d\R f _$hK9I x[$KZGK+GL //停止文件下载 a6gPJF[Jo public void siteStop() m+(g.mvK> { # S/n3 bStop = true; _!VtM#G[ for(int i=0;i<nStartPos.length;i++) ~-[!>1!% fileSplitterFetch.splitterStop(); 5Po:$( +$#<gp" nW^h
+ } "O-X*>?f }
EADN //负责部分文件的抓取 #t;]s< **FileSplitterFetch.java xMNQT.A */ O9zMD8 package NetFox; Dn@ZS _f !H@HgJ
- rM^2yr7H import java.io.*; 9-V'U\}L import java.net.*; /t`,7y3T +ue1+# ',xUU{5? public class FileSplitterFetch extends Thread { .>#O'Z&q9 gOe!GnO 4`)r1D!U String sURL; //File URL c-5AI{%bl6 long nStartPos; //File Snippet Start Position \b%c_e long nEndPos; //File Snippet End Position FNuE-_
int nThreadID; //Thread's ID y2#"\5dC boolean bDownOver = false; //Downing is over 0;@>jo6,! boolean bStop = false; //Stop identical k7Qs#L FileAccessI fileAccessI = null; //File Access interface (_!I2"Q* vb?.`B_>& 9od*N$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c_S~{a44Ud { #;~HoOK*# this.sURL = sURL; dt@c,McN|Q this.nStartPos = nStart; XVqkw@Ia4! this.nEndPos = nEnd; @8>bp#x/1 nThreadID = id; _k26(rdI@- fileAccessI = new FileAccessI(sName,nStartPos);//定位 .D ^~!A } =R'O5J n42\ty9 _tX=xAO9 public void run() Y2XxfZj { AEaN7[PQx| while(nStartPos < nEndPos && !bStop) |nWEuKHy { ?T_MP" g)^s+Y De^:9<{jc try{ [520!JhZY URL url = new URL(sURL); \eNB L[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M;Pry3J httpConnection.setRequestProperty("User-Agent","NetFox"); lq "X_M$ String sProperty = "bytes="+nStartPos+"-"; -z+,j(@ httpConnection.setRequestProperty("RANGE",sProperty); 8U(o@1PT Utility.log(sProperty); [tof+0Y6 H7.l)' P{UV3ZA% InputStream input = httpConnection.getInputStream(); ZIa,pON //logResponseHead(httpConnection); MTCfs~}m tB"9%4]( {&>rKCi byte[] b = new byte[1024]; 2b"DkJj' int nRead; ,8Po
_[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .l_Nf9= { p*,T~(A6 nStartPos += fileAccessI.write(b,0,nRead); ssx#|InY //if(nThreadID == 1) B7[d^Y60B // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); OqIXFX" } X*@ tp,t iLZY6?_^ YLQ0UeDN' Utility.log("Thread " + nThreadID + " is over!"); /P@%{y bDownOver = true; 6QY;t:/< //nPos = fileAccessI.write (b,0,nRead); ap )B%9 } ur8+k4]\" catch(Exception e){e.printStackTrace ();} M
Zz21H } FMeBsI9pL } p>+9pxx~U ;j/$%lC U< Xdhgo? //打印回应的头信息 -)oUb=Lk{ public void logResponseHead(HttpURLConnection con) g?v(>#i { ').)0; for(int i=1;;i++) KH;~VR8"/ { z``wqK String header=con.getHeaderFieldKey(i); $\h-F8|JMX if(header!=null) F!EiF&[\J //responseHeaders.put(header,httpConnection.getHeaderField(header)); iOURS Utility.log(header+" : "+con.getHeaderField(header)); WM
?a1j else `L`+`B break; $N)G:=M!s } N5=BjXSAg } i>YQ<A1 Pn">fWRCx }l7+W4~ public void splitterStop() X%5eZ"1{x { F=e9o*z bStop = true; 50N4J } (~^fx\-S 6I@j$edZ Y\-xX:n.\ } ~< bpdI0 TsaQR2J@ mg'q-G`\< /* NAvR^"I~ **FileAccess.java
'/.Dxib *//文件访问(定位,写) b/z-W`gw package NetFox; Bxm,?=h import java.io.*; 1^WGJ"1 T(7`$<TQ DQXUh#t\(] public class FileAccessI implements Serializable{ ResU5Ce~ M@A3+v%K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 pd'0| RandomAccessFile oSavedFile; yv[j
Pbe long nPos; lln"c j HHWq>=d V|MGG public FileAccessI() throws IOException +H2Jhgi { /e '3\,2_ this("",0); QF"7.~~2 } <xy@% Q*smH-Sw PdcIHN public FileAccessI(String sName,long nPos) throws IOException l'+3
6 { &n k)F< oSavedFile = new RandomAccessFile(sName,"rw"); V*4Z.3/E5 this.nPos = nPos; i?6&4 oSavedFile.seek(nPos); !wy _3a } dE7x
SI 9* )&hhBs, s:U:Dv public synchronized int write(byte[] b,int nStart,int nLen) ;l@94)@0 { ;}46Uc#WS int n = -1; JtL>mH try{ ~R!1{8HP oSavedFile.write(b,nStart,nLen); NfgXOLthM n = nLen; v/`D0g-uX) } (u,)v_Oo]a catch(IOException e) c?A$Y?|9 { ?Z#N9Z~\ e.printStackTrace (); O sgPNy0 } !Z!)$3bB *d1BpR% kt6x"'"1 return n; rQjk
} G$<(>"Yr~$ 5p0~AN) tDK@?PfKz } Q]k<Y B5lwQp] <XdnVe1 /* [RyVR **SiteInfoBean.java ;.>*O
oe& */ /%T/@y package NetFox; !m@cTB7i
fzSkl`K} /7AHd ; public class SiteInfoBean { BPY7O ;KL7SM%g4 D#g-mqar: private String sSiteURL; //Site's URL NdXHpq; private String sFilePath; //Saved File's Path CsO!Y\'FY private String sFileName; //Saved File's Name RM2Ik_IH[l private int nSplitter; //Count of Splited Downloading File w 3t,S3! 6V;Dcfvi /UCBoQ$/] public SiteInfoBean() HsCL%$k {//nSplitter的缺省值为5 b;i*}4h! //default value of nSplitter is 5 :@L7RZ`_ this("","","",5); x5lVb$!G } 3q]0gU&?? /vQ)$;xf# |+cz\+ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Ua1&eCZi { D;,p?]mgO~ sSiteURL= sURL; jD
S?p)& sFilePath = sPath; {]CZgqE{ sFileName = sName; 46?z*~*G this.nSplitter = nSpiltter; 529;_| #VQZ"7nI@ i$Y#7^l%k } 1[egCC\Mo_ )."ob=m uYC^&siS<s public String getSSiteURL() 9{pT)(Wnb { YD4I2'E return sSiteURL; %['NPs%B } 1mFH7A($ ,N$Q']Td EjPR+m public void setSSiteURL(String value) #$WnMJ@ { v`h>5#_[ sSiteURL = value; (B#FLoK } dle\}Sy= ]OpGD5jZ wSR|uh public String getSFilePath() igu1s}F { qnP4wRpr return sFilePath; MWwqon| } X}#vt?mu MTYV~S4/ ^#5'` #t public void setSFilePath(String value) HNkOPz+d&8 { r/h\>s+N sFilePath = value; }s2CND } :(q4y-o6 ;D'm=uOl bdrE2m public String getSFileName() FBE|pG7 { +Xg:*b9So return sFileName; c!@|yE, } x8lBpr ~&:-c v ?y|&Mz'XJ( public void setSFileName(String value) Zbo4{.# { ZK4V-?/[6 sFileName = value; p5]W2i., } ivo3pibk% 2I:P}! 091m$~r* public int getNSplitter() .{gDw { ;(K/O?nrJ return nSplitter; P$'PB*5d| } gwB,*.z #X]*kxQ< T4x%3-4; public void setNSplitter(int nCount) .XgY&5Qk { ^E%R5JN
nSplitter = nCount; w&@tP^` } :h,}yBJ1L } KXMf2)pa .*NPoW4Kv &pK0>2 /* oDS7do **Utility.java #~Xj=M% */ H[w';u[% package NetFox; FqyxvL. (bm>
)U= /'oo;e public class Utility { Z6B$\Q5Od cvw17j z*HM_u public Utility() %nJo:/ { #2|biTJ / 8O=3 +M.BMS2A<l } e R[B0;c (x%
4* //线程睡眠 FVNTE+LW public static void sleep(int nSecond) lDBAei3iB { v2gk1a& try{ RaLV@>jPm Thread.sleep(nSecond); V+D <626o } q4X(_t catch(Exception e) Lapeh>1T { ,g'>Ib% e.printStackTrace (); =XYc2.t } 7Z9'Y?[m } =LY`K# C-ORI}o //日志 z-3.%P2g public static void log(String sMsg) #Fo#f<bp { *Mg@j;+5s System.err.println(sMsg); Z@Q/P(t } ;4dFL\KU >r X$E<B\ D]>Z5nr | public static void log(int sMsg) yk!K5 { f4,|D | System.err.println(sMsg); pC,Z=+: } bGB$a0 } >aVtYp B @}PXBU M_+W5Gz< /* 8wO4; **TestMethod.java vr"Pr4z4i */ k:7Gb7\ package NetFox; a:GM|X WnGi;AGH=1 ~u!V_su]GY public class TestMethod { #oiU|>3Y W=g'Xu!|!2 9:g]DIL public TestMethod() ho6hjhS|u { ///xx/weblogic60b2_win.exe QSzht$8 try{ /
j "}e_Q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); [< g9jX5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s%rmfIp" SiteFileFetch fileFetch = new SiteFileFetch(bean); MrUjqv6a[ fileFetch.start(); Y6Y"fb%K } C(h<s
e? catch(Exception e){e.printStackTrace ();} i@D4bd9lR #?\(l% 7MZH'nO } |_g7k2oLY T9J&^I E;`^`T40 public static void main(String[] args) lq.]@zlSO { +VQD' new TestMethod(); QoUdTIIL } 'y>Y */ } SHSfe{n 点击下载更多相关资料
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