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/* UTSL **SiteFileFetch.java PI~1GyJr@; */ w~;I7: package NetFox; eh ,~F import java.io.*; Q3 eM2i8Y import java.net.*; (^5 7UmFv] =1u@7Bh NFr:y<0>z public class SiteFileFetch extends Thread { <97d[/7i :KKa4=5L 3 AHY| SiteInfoBean siteInfoBean = null; //文件信息Bean |hO~X~P long[] nStartPos; //开始位置 c(/VYMJZ& long[] nEndPos; //结束位置 shH~4<15 FileSplitterFetch[] fileSplitterFetch; //子线程对象 Khe!g1=&X long nFileLength; //文件长度 &tZG
@ boolean bFirst = true; //是否第一次取文件 [Cb`{ boolean bStop = false; //停止标志 NziZTU} File tmpFile; //文件下载的临时信息 $Y9jrR'w DataOutputStream output; //输出到文件的输出流 /\w)>0 R'dSbn //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 'r@:Cz3e*I public SiteFileFetch(SiteInfoBean bean) throws IOException qU,c~C=Qf { _6k*'aT~FK siteInfoBean = bean; 2~*Ez!.3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X<MO7I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7nVRn9Hn if(tmpFile.exists ()) oM2UzB{( { { K_kPgKS bFirst = false; x%< read_nPos(); =B ];?% } 1Fe^Qb5G else NB7Y{)
w { .,i(2^ nStartPos = new long[bean.getNSplitter()]; *1'`"D~ nEndPos = new long[bean.getNSplitter()]; jV/CQM5a+ } >;#=gM \NGC$p n 8LI-gp\ 2 {Rear2 } `Rdm-[& CAU0)=M 0vGyI> public void run() ;oxAe<VIj { ^Q{Bq //获得文件长度 bpkwn<7- //分割文件 /R
LI,.% //实例FileSplitterFetch +xXH2b$wWC //启动FileSplitterFetch线程 e8EfQ1 Ar //等待子线程返回 gUAxyV try{ gUR]{dq^' if(bFirst) 3^StIw{X { $3d}"D nFileLength = getFileSize(); PU {uE[ if(nFileLength == -1) 1
Vy,&[c~" { &5%dhc4&!& System.err.println("File Length is not known!"); c DrebU } 2T)sXB u else if(nFileLength == -2) 6QNs\Ucb+ { !'f3>W\
System.err.println("File is not access!"); /:\3 \{?0m } P(SZ68 else "{E qhR~ { vZ#!uU^a: for(int i=0;i<nStartPos.length;i++) f7hXQ|$ {
Q2p)7G nStartPos = (long)(i*(nFileLength/nStartPos.length)); \]Dt4o*yZ }
I<=Df5M for(int i=0;i<nEndPos.length-1;i++) &48_2Q"{ { 7dX/bzUVz8 nEndPos = nStartPos[i+1]; rxO2js } o+?rI
p nEndPos[nEndPos.length-1] = nFileLength; f&hwi:t } C*I(|.i@ } #Y93y\ w#
*1 /N %@R~DBS //启动子线程 XMRNuEU fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Z?^"\u- for(int i=0;i<nStartPos.length;i++) @ 2_<,;$ { aj~bt-cE fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]bgY6@M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #*c F8NV- nStartPos,nEndPos,i); 'ZQWYr9R Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tVqmn fileSplitterFetch.start(); X8<2L2: } #)`A7 $/, // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6<5Jq\-h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &,i~ cG? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", oh#>
5cA8 nEndPos = " + nFileLength); &kQ!KA28 // fileSplitterFetch[nPos.length-1].start(); =ZsGT R<zG^m CiL94Nkd9 //等待子线程结束 !RlC~^
- //int count = 0; M8@_Uj //是否结束while循环 *OdX u&5 boolean breakWhile = false; g6sjc,` bQaoMZB P|^$kK while(!bStop) fj4^VXD { 4S
L_-Hm. write_nPos(); }~o
ikN: Utility.sleep(500); z8Q"%@ breakWhile = true; ]v5-~E! Y'Z+, CNf ~]8p_;\ for(int i=0;i<nStartPos.length;i++) ^ft]b2i { l[/q%Ca'> if(!fileSplitterFetch.bDownOver) fw{,bJ(U { .h;Se breakWhile = false; >&H~nGP. break; t#<KxwhcN } hN(L@0) } '5};M)w if(breakWhile) 3D)b*fPc break; .dI)R40L/\ g-yi xU }.:d#]g8 //count++; qi+&|80T. //if(count>4) Cj&$%sO1 // siteStop(); r(}nhU Q%E } K@@9:T$ 9b6!CNe! =Mhg System.err.println("文件下载结束!"); PaVO"y]C } b4 hIeBI\ catch(Exception e){e.printStackTrace ();} yty`2$O } =J@`0H" 4R +P @+^c"=d1S //获得文件长度 Lm.`+W5 public long getFileSize() x.EgTvA&d { h)E|?b_ int nFileLength = -1; eO{@@?/y try{ 67J*&5? | URL url = new URL(siteInfoBean.getSSiteURL()); w{'2q^>6* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D{AFL.r{ httpConnection.setRequestProperty("User-Agent","NetFox"); 4YJ=q% G jNy?[
) /#yA%0=w int responseCode=httpConnection.getResponseCode(); ):bu;3E if(responseCode>=400) wO"GtVd { ">6&+^BN' processErrorCode(responseCode); *?8RXer return -2; //-2 represent access is error )&.!3y 660 } abZdGnc (5;D7zdA w3#`1T`N String sHeader; V:\]cGA{ 8Inx/>eOI 0yHjrxc$ for(int i=1;;i++) 5
R*lVUix { h#{T}[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 93I'cWN //Utility.log(in.readLine()); ypA: P sHeader=httpConnection.getHeaderFieldKey(i); EDN(eh(_ if(sHeader!=null) +{6`F1MO { nC~fvyd<P if(sHeader.equals("Content-Length")) :l~E E! { 797X71> nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 5.k}{{+ break; >38
Lt\ } G&o64W;-s } z{6YC~ else y~p4">] break; Dq`~XS* } <bdyAUeFw } 9d"5wx catch(IOException e){e.printStackTrace ();} l^,qO3ES catch(Exception e){e.printStackTrace ();} ZT9IMihV Qcgu`]7} Wy(pLBmb Utility.log(nFileLength); g9qC{xd _j 5N=I{U sPpS~wk* return nFileLength; nx;$dxx_Ws } 9-G b"hr aQmfrx =xBT>h; //保存下载信息(文件指针位置) hwDXm9 private void write_nPos() Yzd2G,kZ= { Y*\6o7 try{ =yh3Nd:u output = new DataOutputStream(new FileOutputStream(tmpFile)); ( 2zeG` output.writeInt(nStartPos.length); ~@YQ,\Y for(int i=0;i<nStartPos.length;i++) \[T{M!s { !
o^Ic`FhS // output.writeLong(nPos); cno;>[$ output.writeLong(fileSplitterFetch.nStartPos); u0BMyH output.writeLong(fileSplitterFetch.nEndPos); -,/3"}<^78 } 9>{t}Id output.close(); "!a`ygqpT } \c68n catch(IOException e){e.printStackTrace ();} >i`8R catch(Exception e){e.printStackTrace ();} !a4cjc( } qwP $~Bj &>V/X{>$`K 8{@`kyy| //读取保存的下载信息(文件指针位置) IM$0#2\ private void read_nPos() _-6e0sr Z { hpjUkGm5 try{ V{FE [v_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?C~X@sq int nCount = input.readInt(); #|ddyCg2 nStartPos = new long[nCount]; xDLMPo& nEndPos = new long[nCount]; !Y|8z\Q for(int i=0;i<nStartPos.length;i++) *pK lA&_ { Oh-Fp-v87 nStartPos = input.readLong(); #~1wv^ nEndPos = input.readLong(); $vqU|]J` } 2R] XH
0 input.close(); 0T1ko,C!,e } *) }
:l catch(IOException e){e.printStackTrace ();} '&)D>@g catch(Exception e){e.printStackTrace ();} QnP{$rT } I)rGOda{ yP%o0n/"x 55,=[ private void processErrorCode(int nErrorCode) 2x6<8J8v* { shy System.err.println("Error Code : " + nErrorCode); mw Z'=H } 1wbTqc ($:y\,5(9I 0IpST //停止文件下载 WT?b Bf public void siteStop() XW^8A77H { 0&Qsk!-B bStop = true; i[8NO$tN1) for(int i=0;i<nStartPos.length;i++) b^%?S8]h fileSplitterFetch.splitterStop(); lc"qqt 6I5o2i Ny B&uf } y]J3hKs } RE*WM3QK~ //负责部分文件的抓取 o|+E+l9\ **FileSplitterFetch.java FXeV6zfrE */ =Iy/cHK package NetFox; Dw*Arc+3V PlF!cr7:4 ZXh~79 import java.io.*;
A<2I! import java.net.*; R|$[U xHm/^C&px 0FTRm2( public class FileSplitterFetch extends Thread { (GnVwJ<v9V [\88@B=jXP w/O<.8+ String sURL; //File URL erXy>H[; long nStartPos; //File Snippet Start Position Esb?U|F4 long nEndPos; //File Snippet End Position y%2%^wF int nThreadID; //Thread's ID a6k(9ZF boolean bDownOver = false; //Downing is over ^t`f1rGR boolean bStop = false; //Stop identical )&XnM69~b FileAccessI fileAccessI = null; //File Access interface q%DVDq( z Q5hb0O%a 0n\^$WY public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException w[e0wh`. { >/8ru*Oc this.sURL = sURL; I'xC+nL@ this.nStartPos = nStart; /z..5r^,ZZ this.nEndPos = nEnd; .r7D)xNa@ nThreadID = id; Is<x31R fileAccessI = new FileAccessI(sName,nStartPos);//定位 >1m)%zt } xnT3^ #-h lD9%xCo9( g)X7FxS,z public void run() &3WkH W { Mp^^!AP 9 while(nStartPos < nEndPos && !bStop) 4 |FRg { NP$e-" 1 *&(2`#C; `}[VwQ try{ 1 pa*T! URL url = new URL(sURL); +g)_4fV0| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A S`2=w httpConnection.setRequestProperty("User-Agent","NetFox"); %A8Pkr<&E String sProperty = "bytes="+nStartPos+"-"; -QN1oK@\mE httpConnection.setRequestProperty("RANGE",sProperty); Ft )t`E'%j Utility.log(sProperty); *Yj~]E0`1 ,Y$F7& } /[_ InputStream input = httpConnection.getInputStream(); Qk+=znJ //logResponseHead(httpConnection); W]Y@WKeT MRjH40"2 +{5JDyh0 byte[] b = new byte[1024]; 1XqIPiXJ int nRead; A<mj8qz while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) o`b$^hv{A { Hde]DK,d nStartPos += fileAccessI.write(b,0,nRead); bK!,Pc< //if(nThreadID == 1) W\&WS"=~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }Q!h ov } Q^*G`&w, *^X#Eb d&NCFx Utility.log("Thread " + nThreadID + " is over!"); P4hZB_.= bDownOver = true; Tld1P69( //nPos = fileAccessI.write (b,0,nRead); s.VUdR" } fEHh]%GT` catch(Exception e){e.printStackTrace ();} g Cg4;b6g } @YEw^J~ } g&{gD^9)4 : :F! 8$2l^ //打印回应的头信息 kX@bv"i public void logResponseHead(HttpURLConnection con) K~`n}_: { #DQX<:u for(int i=1;;i++) ?(fQ<i n { >]:N?[Y_~} String header=con.getHeaderFieldKey(i); _Wm(/ +G_| if(header!=null) ls [Ls //responseHeaders.put(header,httpConnection.getHeaderField(header)); yB0jL:|a Utility.log(header+" : "+con.getHeaderField(header)); 's$A+8;L else NE$VeW+@ break; #=`FM:WH } '9IP; } zY]Bu-S3 b ^uP^](J `%FIgE^ public void splitterStop() di8W2cwz { IUluJ.sXIf bStop = true; 0$n8b/%. } ^^n+ =#OHxM jz{(q; } xP8iz?6"V (:_%kmu M3DxapG /* l4iuu **FileAccess.java W2}%zux *//文件访问(定位,写) 08zi/g2
3 package NetFox; @/CRIei import java.io.*; C_;HaQiu <{$ev&bQ s$f+/Hs public class FileAccessI implements Serializable{ >E//pr)_Km zkjPLeX //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 hknwis%y RandomAccessFile oSavedFile; fl} rz long nPos; E9yFREvQc 6'RZ Z-N-9E public FileAccessI() throws IOException $w|o@ Ml) { :SpG&\+ this("",0); 0MwG}|RC } *4(/t$)pEl 03X<x| "\VW.S public FileAccessI(String sName,long nPos) throws IOException GOv92$e { y+K7WUwhq oSavedFile = new RandomAccessFile(sName,"rw"); AzHIp^ this.nPos = nPos; P`\m9"7 oSavedFile.seek(nPos); ke3HK9P; } - XE79 fQ /2g)Z!&+L %k/
k]:s public synchronized int write(byte[] b,int nStart,int nLen) /Nj:!!
AN { L eG7x7n int n = -1; r[.zLXgK try{ qPFG+~\c oSavedFile.write(b,nStart,nLen); *k3 d^9o# n = nLen; B(4:_j\2 } Z]mM catch(IOException e) #,f}lV,& { *kX3sG$8 e.printStackTrace (); |@o]X?^ } AJ;u&&c4C\ rK(x4]I
l" 8w{#R{w return n; $\YLmG } cCo07R GW>7R6i `-72>F ;T } W (=Wg|cr ]wkSAi5z* '8r8
^g[ /* XEf&Yd **SiteInfoBean.java 5XSxQG@k^z */ Sb:zN'U package NetFox; :$SRG^7md ;
McIxvj 0j
a public class SiteInfoBean { ?z)y%`} e'/ `_ J^g&y~ private String sSiteURL; //Site's URL b2/N H1A private String sFilePath; //Saved File's Path
:f?,]|]+- private String sFileName; //Saved File's Name SQ~N X) private int nSplitter; //Count of Splited Downloading File a`EGx{q( :|n>H+Y X%4uShM public SiteInfoBean() `5k6s, {//nSplitter的缺省值为5 o@<6TlZM //default value of nSplitter is 5 c:h.J4mv this("","","",5); Ac5o K } 5oT2)yz =E{{/%u{{S o-Q]Dk1W
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) lJ2|jFY9 { xu%!
b0 sSiteURL= sURL; [}9XHhY1O= sFilePath = sPath; +2;#9aa
I sFileName = sName; YmO"EWb this.nSplitter = nSpiltter; 7U{b+=,wK i">z8?qF G!e}j
@@ } }l]3m=) pU:C=hq4 x;ICV%g/ public String getSSiteURL() K+h9bI/Sf { (2O} B.6 return sSiteURL; 2vh!pez_ } JL.ydH79 (:fE _H2z |L.~Amd public void setSSiteURL(String value) 9h3~;Q { Cdt,//xrz sSiteURL = value; qOcG|UgF } aV?}+Y{# skR,M=F~ 9aF.. public String getSFilePath() g6@N PQ { ~/|unV return sFilePath; +]S;U&vQ } H4y1Hpa, So)KI_M (v'lb!j^# public void setSFilePath(String value) _Y
><ih { XZep7d} sFilePath = value; [KimY } PO%yWns30o g<hv7?"[ p+`*~6Jj/ public String getSFileName() '.h/Y/oz { ir@N>_ return sFileName; f1]AfH# } {M)3GsP? A=qW]Im 3'sWlhf; public void setSFileName(String value) Ghq'k:K, { 2=Y_Qrhi sFileName = value; \6`%NhkM_ } ?2<6#>(7a Ltic_cjYd? $Va]vC8? public int getNSplitter() }lNufu { 1)/T.q<D" return nSplitter; ktw!T{ } tZNad Yyo9{4v+p{ B yy-Cc public void setNSplitter(int nCount) j3rv2W\ { -EkDG]my nSplitter = nCount; u6qi } #H|j-RM2 } r;%zGF p K&D}!.~/ e@2Vn? 5 /* LHHDt<+B **Utility.java vq0M[Vy */ Za:BJ: package NetFox; S!I <m&Cgc vU$O{|J qs
c-e,rl public class Utility { >nIcFm L1Cn ~g4rGz public Utility() Q5Ghki { "PX3%II XM@-Y&c$A !iitx U } EkjK92cF /<?X-IDz.{ //线程睡眠 m"|(w`n]E+ public static void sleep(int nSecond) 2`FsG/o\T~ { dT,m{[+ try{ (fGJP*YO Thread.sleep(nSecond); P"PeLB9K } K_lL\ catch(Exception e) 6dS1\Y { ZnhuIAAG e.printStackTrace (); KEVy%AP=*h } rd 35) } qiKtR n"d) //日志 N>6yacTB public static void log(String sMsg) u.L8tR:( { !
^*;c# System.err.println(sMsg); Zz)oMw } \I,Dje/:w NX{-D}1X= }Mb'tGW public static void log(int sMsg) ZhbY,wJ, { KGE-RK System.err.println(sMsg); -TU{r_!Z( } mKFHT } 7E75s)KH !qGx(D{\ Lc: SqF /* p:Ld)U * **TestMethod.java =|5bhwU] */ |3T|F3uEX
package NetFox; <#x%A0 uuK]<h* d>"$^${ public class TestMethod { f_P+qm GwpBDMk ,Qi|g'a public TestMethod() teS0F { ///xx/weblogic60b2_win.exe h, 6S$,UI try{ }Ka.bZS SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); vb ^!( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s)DNLx
SiteFileFetch fileFetch = new SiteFileFetch(bean); BM$tywC fileFetch.start(); $*)(8C l } [U7,\o4w catch(Exception e){e.printStackTrace ();} _BLSI8!N@ D%Jc?6/I#3 U*fj5 } tG^ ?fc yb.|7U?/x >Hzb0N!VJ public static void main(String[] args) |&RX>UW$W { aU8Ti8A> new TestMethod(); 7
} MJK) } f`]E]5? } *2C79hi1 点击下载更多相关资料
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