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/* 0@Z}.k30 **SiteFileFetch.java <4582x,G */ yV*4|EkvW package NetFox; #g<6ISuf import java.io.*; _Sl3) import java.net.*; ZKai*q4? H^M>(kT#& WJN)<+d public class SiteFileFetch extends Thread { gmZ] E45 DTHWL -s]@8VJA" SiteInfoBean siteInfoBean = null; //文件信息Bean s%1ZraMvJ long[] nStartPos; //开始位置 `i<Z<
<c> long[] nEndPos; //结束位置 ?/8V%PL~$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 %Rk DR long nFileLength; //文件长度 wZWAx boolean bFirst = true; //是否第一次取文件 L[!||5y boolean bStop = false; //停止标志 c7RQ7\ File tmpFile; //文件下载的临时信息 ;*0?C'h= DataOutputStream output; //输出到文件的输出流 G=|~SYz ],Yy)<e. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %*#+(A"V public SiteFileFetch(SiteInfoBean bean) throws IOException fElFyOo+ { `\f 3Ij, siteInfoBean = bean; 2OQ\ z;s //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); W6B"QbHYz tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); : [7O=[pk if(tmpFile.exists ()) JfmYr47Pv { '.&Y)A6! bFirst = false; !s:e read_nPos(); ;%;||?'v } n~.$iN else $m A2AI { "lSh4X nStartPos = new long[bean.getNSplitter()]; <_#2+7Qs nEndPos = new long[bean.getNSplitter()]; &xUD( } Xj~%kPe @0d"^ W1EYVXN e5
}amrz } YoBe!-E SMzq,?-` zTc*1(^ public void run() ]qxl^Himq { p4
=/rkq //获得文件长度 A\#z<h[> //分割文件 i1!1'T8 //实例FileSplitterFetch _54gqD2C,
//启动FileSplitterFetch线程 kw
E2V+2 //等待子线程返回 !?=U{^|7y try{ -$DfnAh if(bFirst) Ri~$hs! { gn&Zt}@[ nFileLength = getFileSize(); *UJ4\ if(nFileLength == -1) gKQV99 { bzxf*b1I System.err.println("File Length is not known!"); -J8Hsqf@ } 8QZI(Xe9r else if(nFileLength == -2) |`t 6lVO,Z { &*%x]fQ@ System.err.println("File is not access!"); y^ |u'XK } F"UI=7:o else &N._}ts { rQyjNh for(int i=0;i<nStartPos.length;i++) 8-Y*b89 { 8-B7_GoJ+B nStartPos = (long)(i*(nFileLength/nStartPos.length)); YWvD+ } -5 D<zP/ for(int i=0;i<nEndPos.length-1;i++) T7^;!;i`X { N+@ Ff3M nEndPos = nStartPos[i+1]; yCvtglAJ4 } !*Eu(abD nEndPos[nEndPos.length-1] = nFileLength; (D) KU9B> } J E7m5kTa } Uq$/Q7 kM{8zpn }#7rg_O]> //启动子线程 Cj<8r S4+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; c|;n)as9(% for(int i=0;i<nStartPos.length;i++) UZ2_FP { L_RVHvA=M/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]LUcOR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), oDMPYkpTu nStartPos,nEndPos,i); Q_|}~4_+ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /HpM17
fileSplitterFetch.start(); .i
I{ } rB$~,q&.V // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [
gM n siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); K F_fz // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 94BH{9b5 nEndPos = " + nFileLength); 1+uZF // fileSplitterFetch[nPos.length-1].start(); ]s AuL! jts0ZFHc- p eO@ZKmM //等待子线程结束 w;`Jj- //int count = 0; Ee2P]4_d //是否结束while循环 u,So+% boolean breakWhile = false; B[GC@]HE J
W@6m z&amYwQcI while(!bStop) ;+E]F8G9r { 0BlEt1e2T write_nPos(); mG&A_/e!9 Utility.sleep(500); oxlor,lw/ breakWhile = true; $qQYxx@ {x_.QWe5 (4cdkL for(int i=0;i<nStartPos.length;i++) FT-.gi0 { eyD V911 if(!fileSplitterFetch.bDownOver) UrizZ5a { MONX&$ breakWhile = false; 6MT
(k: break; z}!g2d } wS*r<zj } ^[xcfTN if(breakWhile) g%f5hy break; \dtiv& x 1RYrUg"s" e.n(NW //count++; ~i5YqH0 //if(count>4) z3+@[I$ // siteStop(); 2e1KF=N+ } p@^G)x mQ:{>` 5CFNBb%Xy System.err.println("文件下载结束!"); oZvG Kf } &W@2n&U.q catch(Exception e){e.printStackTrace ();} gm-[x5O" } a_>|Ny6{ X/~uF9a'< JI5o~;}m //获得文件长度 4b2d(x)0X public long getFileSize() ]u|fLK.| { 53])@Mmus int nFileLength = -1; T$%|=gq try{ +-!E%$ URL url = new URL(siteInfoBean.getSSiteURL()); |3' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l{k_;i!D httpConnection.setRequestProperty("User-Agent","NetFox"); R/hIXO ,;`f* # dht0PZdx? int responseCode=httpConnection.getResponseCode(); %\m"Yi] if(responseCode>=400) p~$cwbQ! { *LEy#N processErrorCode(responseCode); _%nz-I return -2; //-2 represent access is error xLW$>;kI } :o'x?] 5RP kAC entU+O r String sHeader; BX >L7 n ')"+ a^c hYW9a`Ht/ for(int i=1;;i++) sK}AS;: { '$9o(m# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1$>+rW{a //Utility.log(in.readLine()); u R0UfKK sHeader=httpConnection.getHeaderFieldKey(i); o`bc/3! if(sHeader!=null) E/zf9\ { PF%-fbh!~ if(sHeader.equals("Content-Length")) b:dN )m { >+2&7u nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Cr.YSWg)4 break; !jj`Ht) } [l23b{ } QQ(}71U else 4zoQe>v~ break; #<*Vc6pC } }%|ewy9|CW } 4>KF`?%4 catch(IOException e){e.printStackTrace ();} ]5ZXgz catch(Exception e){e.printStackTrace ();} 2JfSi2T ]~TsmR[ >i/jqT/ Utility.log(nFileLength); /DQYlNa EQ1**[$ y9:4n1fg return nFileLength; V1aP_G-: } j q+(2 "=h1gql' IG^@VQ% //保存下载信息(文件指针位置) rAenxZ,tF private void write_nPos() 28MMH
Q { .U1wVIM try{ &,nv+>D output = new DataOutputStream(new FileOutputStream(tmpFile)); (V{/8%mWc output.writeInt(nStartPos.length); I
]m for(int i=0;i<nStartPos.length;i++) Uj!3MF { UC!mp?
// output.writeLong(nPos); }%wd1`l7 output.writeLong(fileSplitterFetch.nStartPos); 384n1? output.writeLong(fileSplitterFetch.nEndPos); pj>R9zpn_ } 7({)ou x output.close(); 2b"*~O; } F y+NJSG catch(IOException e){e.printStackTrace ();} Xaq;d' catch(Exception e){e.printStackTrace ();} 1.3#PdMR, } VvhfD2*T eM7@!CdA9q =2R4Z8G //读取保存的下载信息(文件指针位置) iN;Pg_Kq private void read_nPos() y=3 dGOFB { w~3X
m{ try{ =ZgueUz, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +f3Rzx] int nCount = input.readInt(); "zEl2Xn28_ nStartPos = new long[nCount]; 5!c/J:z nEndPos = new long[nCount]; A7p4M?09 for(int i=0;i<nStartPos.length;i++) *$Q>Om] { @Z5q2Q nStartPos = input.readLong(); "[)G{VzT nEndPos = input.readLong(); LlTD =tJ0 } Y{Z&W9U input.close(); _"8n&=+ } ^C>kmo3J catch(IOException e){e.printStackTrace ();} N ,~O+ catch(Exception e){e.printStackTrace ();} #:)'D?, } IwyA4Ak Ru yD9enYM u~uzKG private void processErrorCode(int nErrorCode) }\a#e^-xQ+ { ?ANWI8'_j System.err.println("Error Code : " + nErrorCode); Cfi{%,em } .:S/x{~ 85<k'>~L AL]gK)R //停止文件下载 o}N@Q-i gq public void siteStop() L%/RD2LD { w2LnY1A bStop = true; , ZsZzZ# for(int i=0;i<nStartPos.length;i++) `z!AjAT-G fileSplitterFetch.splitterStop(); k!c7eP"%8^ $|$@?H>K g/GI'8EMj } WjVBz } Mh%{cLM //负责部分文件的抓取 j0l,1=^>l **FileSplitterFetch.java t3L>@NWG */ r)<A YX]J package NetFox; )5|9EXh G(E1c"? cy%M$O|hX5 import java.io.*; 0y|1@CS import java.net.*; 2Rw<0.i| %1TKgNf HsYzIQLL public class FileSplitterFetch extends Thread { BPj?l 7KiraKb| 3chx4 String sURL; //File URL B=*0 long nStartPos; //File Snippet Start Position ]0'cdC long nEndPos; //File Snippet End Position 07SW$INb int nThreadID; //Thread's ID cS Lj\'`b boolean bDownOver = false; //Downing is over AO`@&e]o boolean bStop = false; //Stop identical X[Iy6qt FileAccessI fileAccessI = null; //File Access interface hYyIC:PXR DSHvBFQ _v#puFy public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException #8XmOJ"W3k { *Z"cXg^ti this.sURL = sURL; S8qg"YR this.nStartPos = nStart; Y
22Ai this.nEndPos = nEnd; r3x;lICx- nThreadID = id; jy0aKSn8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 Otu?J_ d3 } J8\l'}?& V(kK2az >3g`6d public void run() _t,aPowX { Q^<amM! while(nStartPos < nEndPos && !bStop) \V 'fB5 { .4ww5k> <`-sS]=d} t$qIJt$ try{ .]exY
i URL url = new URL(sURL); M
p<r`PM2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n]vCvmt httpConnection.setRequestProperty("User-Agent","NetFox"); >#n"r1 String sProperty = "bytes="+nStartPos+"-"; 5Kd"W, httpConnection.setRequestProperty("RANGE",sProperty); b`%u}^B { Utility.log(sProperty); YL`ML t4MC kt`ln 0X99D2c InputStream input = httpConnection.getInputStream(); |{|B70v3Co //logResponseHead(httpConnection); ^%%Rf A%EhRAy LTBH/[q5 byte[] b = new byte[1024]; 8=bn
TJf int nRead; _GY2|x2c while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Q7pCF,; { cl#XiyK> nStartPos += fileAccessI.write(b,0,nRead); i+QVs_jW //if(nThreadID == 1) C:&Sk\
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3Yx'/ =] } [x?9<#T 1LFad>` )M.g<[=^ Utility.log("Thread " + nThreadID + " is over!"); ~9@527m<', bDownOver = true; B]hRYU //nPos = fileAccessI.write (b,0,nRead); iiuT:r } V!*1F1 catch(Exception e){e.printStackTrace ();} o
S{hv:)> } (MqQ3ys } r9-ayp#pC KN@ [hb7% VJA/d2Oys //打印回应的头信息 l'Li!u public void logResponseHead(HttpURLConnection con) (-1{W^( { ,;MUXCC' for(int i=1;;i++) 5m@'( ]j { GGLSmfb) String header=con.getHeaderFieldKey(i); 08AD~^^ if(header!=null) F W2x //responseHeaders.put(header,httpConnection.getHeaderField(header)); (VkO[5j Utility.log(header+" : "+con.getHeaderField(header)); B(FM~TVZ else Qa9@Q$ break; AW_ YlS } g"!cO^GkT } LO%e1y w|I5x}ZFG "7fEL:|j public void splitterStop() L|D9+u L { TWRnty-C bStop = true; #u"@q< ) } /EHO(d!< ?|NsaW 2u0B=0x } 2!9W:I7 dA2@PKK lpB:lRM /* 4!3<[J;N; **FileAccess.java 3ohHBo *//文件访问(定位,写) |"b|Q package NetFox; b{<$OVc import java.io.*; _h,X3P %PPy0RZ^
EKw)\T1 public class FileAccessI implements Serializable{ Jv%)UR.] Uw5&.aqn.b //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5yJ~ q RandomAccessFile oSavedFile; 'F*OlZ!BWy long nPos; GVf[H2%H 'm<L}d z#n+iC$9 public FileAccessI() throws IOException
t"~X6o|R { 1n*"C!q this("",0); S,'ekWVD } 9qzHy}A 1j}e2H $QT% -9& public FileAccessI(String sName,long nPos) throws IOException t82*rCIB{ { 1} _<q k9 oSavedFile = new RandomAccessFile(sName,"rw"); 8A*tpMV?J this.nPos = nPos; hr&UD| E= oSavedFile.seek(nPos);
31]Vo;D } g<w1d{Td xvWP^Qkb {q&`B public synchronized int write(byte[] b,int nStart,int nLen) 'Vhnio;qC { c*(=Glzn int n = -1; !QqVJ a{j try{ XCez5Q1 oSavedFile.write(b,nStart,nLen); ;s4e8![o3 n = nLen; or)fx/ %h } ^g <Lu/5w catch(IOException e) f7%g=0.F { ,&@FToR e.printStackTrace (); 11!4#z6w } Fvnf;']q -O@/S9]S) '&]6(+I> return n; !:_krLB< } }$@K S!iDPl~ CWD
$\K G } :19s=0 Z]OX6G &k(tDP /* 'Rv.6>xqc **SiteInfoBean.java eI-FJ/CJ */ 1aUu:#c package NetFox; tg ~7^(s LH~
t5 tU8aPiUl public class SiteInfoBean { Wl,I %<&j} &';@CeK G<~P||Lu^ private String sSiteURL; //Site's URL z-nV!# private String sFilePath; //Saved File's Path `KP}pi\ private String sFileName; //Saved File's Name L$ju~0jl)% private int nSplitter; //Count of Splited Downloading File )VG_Y9;Xk: ggHl{cl) O-+!KXHd[ public SiteInfoBean() k{\a_e` {//nSplitter的缺省值为5 4DGKZh'm" //default value of nSplitter is 5 S.owVMQ this("","","",5); Wk/Il^YG } _<)HFg6 ^P*+0?aFr 1a#R7chl public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ksqb& ux6 { >>>MTV f sSiteURL= sURL; :XO7#P sFilePath = sPath; )Mw 3ZE92 sFileName = sName; :*Z@UY this.nSplitter = nSpiltter; J]&nZud`
&y7~
u%CJjy } []H0{a2{< 9sB LCZ R)GDsgXy public String getSSiteURL() 0h"uJco, { p/jAr+XM return sSiteURL; rGSi
!q } /oU$TaB>( xb^M33-y S%w67sGl4n public void setSSiteURL(String value) Now2ad& { Qlhm:[ sSiteURL = value; C2K<CDVw } 1++ Fs n,|YJ,v[ FVoKNaK- public String getSFilePath() <V4"+5cJ8 { D+Z,;XZ return sFilePath; G4,BcCPQ } G)7J$4R "I45=nf N|s8PIcSp public void setSFilePath(String value) 7, :l\t { xh!aB6m8R sFilePath = value; )0 i$Bo } !Y]%U @4} !Ka~X!+\ ;+VHi%5Z public String getSFileName() vXcgl { N'0fB`:kz return sFileName; {Gr"oO`&" } ]"\XTL0 !o/;"'&E P,SI0$Z public void setSFileName(String value) (I(k$g[> {
;5}y7#4C sFileName = value; W:=CpbwENX } I6F $@ 4S,/Z{ J. 0XrOOYmx public int getNSplitter() :<E\&6# oC { \E2S/1p return nSplitter; H6-{(:
*< } <fcw:Ae Ty"=3AvRLV =`BPGfCb public void setNSplitter(int nCount) \G &q[8F\ { !fG`xZ~ nSplitter = nCount; I KDh)Zm } wi-{& } q
e;O Ox vke]VXU9z }WG -R /* U-:_4[ **Utility.java =)y=39&;/ */ 'O]Ja- package NetFox; "]{"4qV1= dq$CCOC^F O\qY?) public class Utility { DM@&=c wKs-<b%; .TWX,# public Utility()
I`}<1~ue { 4 '-GcH Ty>g:#bogI /Q[M2DN@ } `` mi9E )Y+?)=~ //线程睡眠 *]_GFixi public static void sleep(int nSecond) 9d!}]+"d42 { 6
bnuC try{ VpMPTEZ*L Thread.sleep(nSecond); We*)RXm% } H/ 6GD,0 catch(Exception e) A/"p PO { IW'2+EGc e.printStackTrace (); ,o)U9< } l6Q75i)eF } \LS+.bp% |.Pl[y //日志 UPkD^D, public static void log(String sMsg) 1y5$ { _('KNA~ System.err.println(sMsg); j\SW~}d9 } Uwqm?] ?geEq' J12ZdC'O public static void log(int sMsg) @pD']=d}t { afMIq Q? System.err.println(sMsg); "HQH]?!k } [af<FQ { } ,1YnWy* 1Bz'$u;
[T.BK: /* 1+^L,-k! **TestMethod.java +0O{"XM */ sQS2U6 package NetFox; ya'@AJS iM Xl}3 >, &6zj public class TestMethod { ~qiSkG 66%#$WH# G'z&U?Ng public TestMethod() BK'!WX { ///xx/weblogic60b2_win.exe iD|"} }01 try{ WQ]~TGW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); eD, 7gC- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %&"_=Lc SiteFileFetch fileFetch = new SiteFileFetch(bean); Iy](?b fileFetch.start(); d+|8({X]D8 } v5t`?+e catch(Exception e){e.printStackTrace ();} 2f]9I1{ 56o?=| *4^!e/ } X./4at` =ot`V; Q> P,O9On public static void main(String[] args) R9yK" { UJ)\E
^Hp new TestMethod(); )*^PMf } S {z%Q } 'W$jHs 点击下载更多相关资料
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