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/* *XbEiMJ **SiteFileFetch.java 9s$CA4?HP */ 1A G<$d5U| package NetFox; $ig0j` import java.io.*; D" rK( import java.net.*; T)TfB( 8xV9.4S $r8 ^0ZRr public class SiteFileFetch extends Thread { "(z5{z?S vyX\'r.~7 ADP%QTdqFJ SiteInfoBean siteInfoBean = null; //文件信息Bean Et/\xL long[] nStartPos; //开始位置 D rHVG long[] nEndPos; //结束位置 *%fi/bimG FileSplitterFetch[] fileSplitterFetch; //子线程对象 vMt/u?oB long nFileLength; //文件长度 [~#WG/!: boolean bFirst = true; //是否第一次取文件 _R13f@NWB: boolean bStop = false; //停止标志 Y^7$t^& File tmpFile; //文件下载的临时信息 ]X5 9 DataOutputStream output; //输出到文件的输出流 Vjp1RWb W~~7C,! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;HJLs2bP public SiteFileFetch(SiteInfoBean bean) throws IOException I]<_rN8~ o { B!_mC<*4`X siteInfoBean = bean; (#Gw1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); MLje4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ke]Lw if(tmpFile.exists ()) rrqR}}l { LO khjHR bFirst = false; ,p2s:&" read_nPos(); (ehK?6[ } X=!^] 3zH else iAa.}CI,zB { 4C-jlm)V nStartPos = new long[bean.getNSplitter()]; E2@65b$ nEndPos = new long[bean.getNSplitter()]; Q<'nE } Ba*,-i3ZK m4&h>9. 8 gL[yA?GoM "2P&X } WEQ1 Seq m~P CB_ifW V4P;
5[ public void run() NI#:|}CYS { , 5kKimTt //获得文件长度 G!W[8UG //分割文件 =K{"{5Wb //实例FileSplitterFetch Wm"4Ae:B //启动FileSplitterFetch线程 Hl/
QnI! //等待子线程返回 BuWHX>H try{ C8e
!H if(bFirst) 9S7kUl{ { cc&axc7I nFileLength = getFileSize(); ^xHTW g%9 if(nFileLength == -1) v'qG26 { jR22t`4 System.err.println("File Length is not known!"); %Bn?n{/ } V |/NB else if(nFileLength == -2) ') gi% { :xD=`ib System.err.println("File is not access!"); *-q"3D` } Nq` C.& else 8x8uo { V9(@Y for(int i=0;i<nStartPos.length;i++) =aj/,Q] { X*39c
b(b nStartPos = (long)(i*(nFileLength/nStartPos.length)); feNdMR7eM } zj`v?#ET for(int i=0;i<nEndPos.length-1;i++) 7_Z#m ( { F\AX: nEndPos = nStartPos[i+1]; 04'~ta(t } OCJnjlV% nEndPos[nEndPos.length-1] = nFileLength; LbG_ z =A } J'fQW<T4wU } jbu8~\" U.XNv-M #iWSDy //启动子线程 R_68-WO fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]Nl=wZ#` for(int i=0;i<nStartPos.length;i++) 2viM)+ { mc_ch$r! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C] 9p5Hs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *R3f{/DK nStartPos,nEndPos,i); *@Y3oh}S Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6s\Kt3= fileSplitterFetch.start(); M^iU;vo } RIE5KCrGB // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iz?tu: \v& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &)vC;$vD` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", jhu&&==\f nEndPos = " + nFileLength); CkD#/
// fileSplitterFetch[nPos.length-1].start(); GXjfQ~<] C;`XlQG ` Bj}^\Pc;} //等待子线程结束 {>,V\J0p //int count = 0; !V\Q<So< //是否结束while循环 T
G{k0cdOT boolean breakWhile = false; t{FlB!jv 92d6U2T4& 4Hn`'+b while(!bStop) )\be2^p { ks97k8B write_nPos(); 80&.JP. Utility.sleep(500); YoLx>8 breakWhile = true; D3^7y.u<) :l&V]}:7* ^#1.l=s for(int i=0;i<nStartPos.length;i++) vab@-=%k { tBT<EV{ G if(!fileSplitterFetch.bDownOver) C,NxE5?h { d&u]WVU breakWhile = false; S.Ma$KL~'^ break; OY5OJ* } Wg0g/ } Ns0cgCrhX if(breakWhile) vRxM4O~" break; |t)}VM% !x>%+&c>k T?1Du"d8 //count++; lGk{LO) //if(count>4) pY~,(s|Qb // siteStop(); n;p:=\uN } Fxqp-}: ~$ f;U E55t*^` System.err.println("文件下载结束!"); !\#_Jw%y } a/U2xq{x catch(Exception e){e.printStackTrace ();} PN<C=gAe } bb`':3% aKlUX ;?~$h-9) //获得文件长度 1q3(
@D5~+ public long getFileSize() R:AA,^Z { *" 98L+ int nFileLength = -1; >,gvb5 try{ =rQP[ICs! URL url = new URL(siteInfoBean.getSSiteURL()); k({\/t3i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c.f"Gv httpConnection.setRequestProperty("User-Agent","NetFox"); {
"xln/ Ev2HGU [ }%`~T>/ int responseCode=httpConnection.getResponseCode(); lR`'e0Lq if(responseCode>=400) qdG~!h7j { h:)Ci!D; processErrorCode(responseCode); l?DJJ|> O return -2; //-2 represent access is error ,\d6VBP& } 2Nm>5l kctzNGF| 1s*.A6EP" String sHeader; je4 w=]JV d:q + Rqy0Q8K< for(int i=1;;i++) ]cC[-F[ { 7HJS.047 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); {d%&zvJnD //Utility.log(in.readLine()); 'snn~{hG sHeader=httpConnection.getHeaderFieldKey(i); 5,;`$'?a% if(sHeader!=null) G"59cv8z4R { a7/-wk if(sHeader.equals("Content-Length")) \WrFqm# { gx:;&4AD nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); lvpc*d|K break; *tX{MSYW } 9Sq%s& } %q322->Z else hv$m4,0WB break; H,<7G;FPT } g3sUl&K } b7\ cxgRq catch(IOException e){e.printStackTrace ();} &G >(9 catch(Exception e){e.printStackTrace ();} NHgjRPz" ,chf~-d dj&}Gedy Utility.log(nFileLength); ZC4*{ iH2n.M
" m&0"<V!H/B return nFileLength; "SoHt]%# } 5ZPzPUa8~ b2^AP\: k ^t*x*m8 //保存下载信息(文件指针位置) !lmWb-v%36 private void write_nPos() qxJQPz { 9H]Lpi^OH try{ =}fd6ea(o output = new DataOutputStream(new FileOutputStream(tmpFile)); h2;z4 output.writeInt(nStartPos.length); Dli^2hD for(int i=0;i<nStartPos.length;i++) Ld,5iBiO: { B 2.q3T // output.writeLong(nPos); ;#)mLsl output.writeLong(fileSplitterFetch.nStartPos); JH]K/sC> output.writeLong(fileSplitterFetch.nEndPos); |m?vVLq } 2~p[7?sp' output.close(); }5O>EXE0R } "?GebA catch(IOException e){e.printStackTrace ();} ZDYJhJ. catch(Exception e){e.printStackTrace ();} Zz |MIGHm } Bl1Z4` 3 9kY[j2,+ 8g7,2f/ } //读取保存的下载信息(文件指针位置) kK~IwA private void read_nPos() ?vGffMm { 5lJ)(|_ try{ ?68uS; DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :Ze+%d= int nCount = input.readInt(); :y,v&Kk#T nStartPos = new long[nCount]; 8Chu"PM%-J nEndPos = new long[nCount]; W {.78Zi9K for(int i=0;i<nStartPos.length;i++) hvt@XZT { m>e3vu nStartPos = input.readLong(); dYojm1MQ nEndPos = input.readLong(); ;}.Kb } pY^9l3y^ input.close(); F[7x*-NO- } f|a DTWF catch(IOException e){e.printStackTrace ();} <<|H=![ catch(Exception e){e.printStackTrace ();} qq0?e0H } Y&r]lD h#Ce_,o Cw,D{ private void processErrorCode(int nErrorCode) h:Ndzp{ { ;<G<1+ System.err.println("Error Code : " + nErrorCode); ;+I4&VieK } TQ1WVq
}* Lg`Jp&Kg ,
Ut Hc] //停止文件下载 [ij,RE7,T public void siteStop() g>7Y~_} { {lz G*4? bStop = true; jV7&Y.$zF] for(int i=0;i<nStartPos.length;i++) >n7["7HHk fileSplitterFetch.splitterStop(); z]$j7 dp vh>{_
# DcV<y-`'1 } azb=(l- } oBlzHBn>0 //负责部分文件的抓取 8!h'j **FileSplitterFetch.java ._p""'Sa */ \w)?SVp package NetFox; 76#.F ?9u4a_x qq+MBW* import java.io.*; }Pg'
vJW import java.net.*; 0v"&G<J Wc#:f8dr O
rk public class FileSplitterFetch extends Thread { 1 2]fQkp [7"}=9 {.#zHL
; String sURL; //File URL IB7tAG8 long nStartPos; //File Snippet Start Position T }uE0Z, long nEndPos; //File Snippet End Position <e6=% 9 int nThreadID; //Thread's ID {=At#*=A boolean bDownOver = false; //Downing is over G79C {|c\ boolean bStop = false; //Stop identical J/4y|8T/y FileAccessI fileAccessI = null; //File Access interface Q.(51]' u5gZxO1J5 +
>sci public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException VvgN3e[ { $M]%vG this.sURL = sURL; A"/aGCG0z this.nStartPos = nStart; \kwe51MQ this.nEndPos = nEnd; +|nsu4t,< nThreadID = id; gB CC fileAccessI = new FileAccessI(sName,nStartPos);//定位 {>.>7{7 } S+*cbA{J| 4IGxI7~27# T=?
bdIl public void run() TJ2/?p\x { iiwpSGFl] while(nStartPos < nEndPos && !bStop) uaQ&&5%%J { h1%y:[_ ?\yB)Nd y :2q
?>\ try{ p\txlT URL url = new URL(sURL); W:ixzpQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pa]
TeH httpConnection.setRequestProperty("User-Agent","NetFox"); <J# R3{ String sProperty = "bytes="+nStartPos+"-"; gv` h-b httpConnection.setRequestProperty("RANGE",sProperty); |z7dRDU}] Utility.log(sProperty); q lY\*{x4 Z oTNm A. Nz_! InputStream input = httpConnection.getInputStream(); *Pb.f //logResponseHead(httpConnection); tq E>Zx=X Q}uG/HI O`[]xs byte[] b = new byte[1024]; UIw?;:Y int nRead; s4IKSX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ip5u_Xj? { "X?LAo nStartPos += fileAccessI.write(b,0,nRead); !\w\ ]7ls //if(nThreadID == 1) M-91
JOt~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~M[>m~8 } ],V
kp ag/u8 OX,F09.C Utility.log("Thread " + nThreadID + " is over!"); lIy/;hIc bDownOver = true; cJ4S! //nPos = fileAccessI.write (b,0,nRead); `t\z } pFH?/D/q catch(Exception e){e.printStackTrace ();} L9'- } cd"wNH- } [xS5z1; .%hQJ{vf-^ T.euoFU{Z //打印回应的头信息 k*9%8yi_ U public void logResponseHead(HttpURLConnection con) {1 HB!@%,( { xf UhSt for(int i=1;;i++) o(SuUGW { <d<RK@2- String header=con.getHeaderFieldKey(i); 9_`3IJ if(header!=null) :,=Fx</H //responseHeaders.put(header,httpConnection.getHeaderField(header)); '!j(u@&! Utility.log(header+" : "+con.getHeaderField(header)); >?Qxpqf2 else +wjlAqMQ break; ]J~g'"> } 0eaUorm) } ^AH-+#5 wO\!xW: W.GN0(uG public void splitterStop() *%f3rvt7@) { 'v`~(9'Rcj bStop = true; G32_FQ$b } n=SzF(S[M :6sGX p ;op'V6iG } _PdAN= C3 1uj05aZh} c; d"XiA /* zrTY1Asw;4 **FileAccess.java n
K0hTQ *//文件访问(定位,写) X!?wL0n package NetFox; yL4 -4 import java.io.*; ?-M)54b\ Cg?I'1]o6 8Y]}Gb! public class FileAccessI implements Serializable{ BfEx'C k4*! Q_A //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 v,@E}F~-f1 RandomAccessFile oSavedFile; zh
hGqz[K long nPos; j?d!}v ^$?7H>=_ha >fhSaeN public FileAccessI() throws IOException s=}~Q&8 { %!W6<ioW this("",0); 6;[1Jz]?i } rGAFp,}-f ]s}aC9I >pJ6{Ip public FileAccessI(String sName,long nPos) throws IOException cEtZ}2,j { (O<abB( oSavedFile = new RandomAccessFile(sName,"rw"); 1pl2;! this.nPos = nPos; :0|Hcg oSavedFile.seek(nPos); u<J2p?`\&` } QDl)92z %j!z\pa cKSfqqPm$" public synchronized int write(byte[] b,int nStart,int nLen) ^$ZI>L0+ { "&s9cO.H int n = -1; -!JlM@ try{ "
-<}C%C oSavedFile.write(b,nStart,nLen); tzP@3+.w n = nLen; </2,2AV4q* } 1XC*| catch(IOException e) +EQpD. { YGi/]^Nba e.printStackTrace (); 23,%=U } 1@s^$fvW >zN"
z) 6qY\7R2+ return n; X~`.} } ,5`."-0} [Ja(ArO3|[ ,$ho2R),Fn } MJpP!a^Q =t~+63) O>kXysM v> /* :tg@HyY) **SiteInfoBean.java Cw@k.{*7, */ P<TpG0~( package NetFox; V%VrAi. 8-W"4)@b Uv#>d}P public class SiteInfoBean { H,01o5J j
P{:A9T\ dY4 8S{ private String sSiteURL; //Site's URL uVoF<={ private String sFilePath; //Saved File's Path i,C0o private String sFileName; //Saved File's Name )<m=YI
;< private int nSplitter; //Count of Splited Downloading File ~t1O]aO( {IF}d*: V7Vbl?*n public SiteInfoBean() n$}R/* {//nSplitter的缺省值为5 ~m009 //default value of nSplitter is 5 |8&\N this("","","",5); >F_qa=t%[ } g>d7%FFn} 1 P(&GYc Ew)n~!s public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &/z+A{Hi { Z{8exym sSiteURL= sURL; 60.[t9pk6 sFilePath = sPath; d;*OO xQV sFileName = sName; jb#1&L14 this.nSplitter = nSpiltter; 5#N"WHz! w%%6[<3% QE`:jxyad } ~4p]E'b VNJDl UeutFNp public String getSSiteURL() e3oYy#QNk { G!>
iqG return sSiteURL; /ynKKJx<Y } >llwNT &Sa_%:*D( ZQgxrZx3 public void setSSiteURL(String value) GgZEg
?@ { >b/k|?xP sSiteURL = value; fwar8
i1 } C.Wms}XA i`ZHjW~` ?[NTw./'7A public String getSFilePath() XSL
t;zL: { +S:u[x return sFilePath; dvrvpDoE. } 5Xq.=/eX 75^)Ni UeK,q>i public void setSFilePath(String value) 5Tcl<Y6l { [TpA26#TTO sFilePath = value; `% #zMS } g z)wUQ|W [E..VesrM 945
|MQPn public String getSFileName() E@'CU9Fo { d=.n|rS4
W return sFileName; jN5} 2 p* } ;OT#V,}r ^bY^x+d K"t:B public void setSFileName(String value) eKU@>5 { ,/[dmoe sFileName = value; /o}0oo5B } %i]uW\~U b'Piymx -?2 &5YB public int getNSplitter() ,~ia$vI}R { "\R@lUx.Y return nSplitter; ]w&?k:y> } tSh}0N) fs)q7 7g Jte:l:yjtA public void setNSplitter(int nCount) B[U.CAUn { <or>bo^ nSplitter = nCount; >8Yrmq } jP6oJcZ } VK@i#/jm k:HSB</} ys"mP*wD /* X=!n,=xI **Utility.java .k!k-QO5La */ c+G :@% package NetFox; l5N\>q A=YEY n A$9_aqbj public class Utility { 41+E U Mc fSQ3 :o <EM LiiNY public Utility() ?'8MI|*l% { aaa#/OWQZ /9vMGef@ "< hx } f>, Qhl #uR q] 'P //线程睡眠 l7r N
public static void sleep(int nSecond) ]@j"0F/` { =[tls^ try{ a?Qcf;o Thread.sleep(nSecond); O]4
x;`) } 0Ts_"p catch(Exception e) 9rvxp; { \"sSS.' e.printStackTrace (); *"9)a6T
t+ } jP7+s.j> } 6O|\4c; ur"e
F //日志 (k2J{6] public static void log(String sMsg) 7<C~D,x6 { W U4vb System.err.println(sMsg); i6\!7D] } odT7Gq />j+7ts BNKo6:wy public static void log(int sMsg) fKK-c9F { B,na System.err.println(sMsg); x2IU PM } JI#Enh!Lv } @W5hrei a^)4q\E :tS>D5dz( /* @xM!: **TestMethod.java d}B_ll#j- */ :$Di.|l@7 package NetFox; iJj?~\zp i(cb&;Xx:A V;+$/>J`vB public class TestMethod { Gy Xs{* Tk|;5^#H .)pRB7O3 public TestMethod() -D^y)
{ ///xx/weblogic60b2_win.exe EvardUB) try{ ~b<4>"7y. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); X]^E:'E! //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >b"z`{tE SiteFileFetch fileFetch = new SiteFileFetch(bean); {O,M}0Eg fileFetch.start();
F3r } lp%.n= '\ catch(Exception e){e.printStackTrace ();} :g:h 0'G 1AkHig, YM/3VD } rOf $Aoqtz d\ F p=Q$J| public static void main(String[] args) YKxA2`3v% { tVh4v#@+ new TestMethod(); dcTM02kEh } Am`A[rV0 } >]08".ajS 点击下载更多相关资料
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