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/* =C.WM*= ' **SiteFileFetch.java SR\F2@u */ P",E/beV package NetFox; 2DbM48\E import java.io.*; +4%:q~C import java.net.*; vs~lyM/ y()Si\9v E)7ODRVbl public class SiteFileFetch extends Thread { Co#_Cyxg=9 \9t6#8 /i)1BaF SiteInfoBean siteInfoBean = null; //文件信息Bean nmrYB w> long[] nStartPos; //开始位置 Bpw<{U long[] nEndPos; //结束位置 ,"W.A FileSplitterFetch[] fileSplitterFetch; //子线程对象 X}gnO83 long nFileLength; //文件长度 Du2v,n5@ boolean bFirst = true; //是否第一次取文件 !HP/`R boolean bStop = false; //停止标志 vAMr&[ File tmpFile; //文件下载的临时信息 jL[
hB DataOutputStream output; //输出到文件的输出流 Y2,\WKa $"&U%3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) SMdkD]{g public SiteFileFetch(SiteInfoBean bean) throws IOException hMiuv_EO! { B=`"!?we siteInfoBean = bean; 9&`ejeD //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); .wfN.Z tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Z*rA~`@K6 if(tmpFile.exists ()) d4#Ra% { d@72z r bFirst = false; .4NQ2k1io read_nPos(); op%?V: } .5~W3v
< else Z/ypWoV( { @.fyOyOC nStartPos = new long[bean.getNSplitter()]; XiB]I5(hcc nEndPos = new long[bean.getNSplitter()]; *t+E8)qL } CxOBH89( nE)|6
0w_2E ]'/ZSy, } ~t~5ctJ@ 4U*uH hsUP5_ public void run() E0i_sB~T { CF`fn6 //获得文件长度 tyLR_@i%% //分割文件 MXxE)"G*a //实例FileSplitterFetch P00pSRQHD //启动FileSplitterFetch线程 +i[w& P //等待子线程返回 Xkv+"F=- try{ F& 'HZX if(bFirst) ,T|%vqbmw { ymsqJ nFileLength = getFileSize(); }bs2Rxkh if(nFileLength == -1) a;A&>Ei} { D?w-uR%Y System.err.println("File Length is not known!"); =/Dp* } !I? J^0T else if(nFileLength == -2) o\luE{H
.? { (qP !x 2j System.err.println("File is not access!"); 0P_Y6w+ } nAp7X-t else 4D/mm(2d$ { 2ju1<t,8) for(int i=0;i<nStartPos.length;i++) Lz
VvUVk { RhJL`>W` nStartPos = (long)(i*(nFileLength/nStartPos.length)); "F+Wo& } Yb|zE for(int i=0;i<nEndPos.length-1;i++) 2Z-BZu K6p { 3o'SY@'W nEndPos = nStartPos[i+1]; CDcs~PR@B } h ,@x5q>g nEndPos[nEndPos.length-1] = nFileLength; ~%Ws"1 } uxto:6),P< } >Q~"/-bN) L?^C\g6u] +M\*C# //启动子线程 ] 05Q4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; BX),U for(int i=0;i<nStartPos.length;i++) tc{23Rf% { b'N"?W^YQ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _OF8D siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2#Au6BvX nStartPos,nEndPos,i); "gCSbMq(Vq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B(MO!GNg= fileSplitterFetch.start(); nDvny0^a } ]sjOn?YA+ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2="C6
7TK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); OD"eB? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", tE{7S/?h nEndPos = " + nFileLength);
KG#|Cq // fileSplitterFetch[nPos.length-1].start(); iR#jBqXD O'."ca]:5 ?.A6HrAPB //等待子线程结束 Q9[dUdQm //int count = 0; utwh"E&W //是否结束while循环 ^;YD3EZw boolean breakWhile = false; i[ BR"( P|.KMtG 2597#O while(!bStop) nm'm*sU\ { r _r$nl write_nPos(); n X
Qz Utility.sleep(500); ej<z]{`05 breakWhile = true; ,ASY
&J5)7 =]E1T8| cQPH le2 for(int i=0;i<nStartPos.length;i++) ]dDyz[NuvD { ,)L.^< if(!fileSplitterFetch.bDownOver) CWkm\= { No[xf9>t breakWhile = false; HIhoYSwB break; >[xQUf,p } Ro:-u7q } S0=BfkHi. if(breakWhile) XB;;OP12 break; Zt` ,DM xs &vgel> ,75,~ //count++; :OI!YR%" //if(count>4) v2@M,xbxF: // siteStop(); Fr%KO)s2 } udc9$uO +[2lS54"W4 00pHnNoxW System.err.println("文件下载结束!"); u gfV' } 5o~Z> catch(Exception e){e.printStackTrace ();} dbZPt~S'$ } K0I-7/L TU. h ?qK:P //获得文件长度 3!$rp- !<) public long getFileSize() 5WZLB = { 9DtSYd/ int nFileLength = -1; E$G"R= try{ G>_ZUHdI URL url = new URL(siteInfoBean.getSSiteURL()); &P{%C5?{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nj9hRiLn httpConnection.setRequestProperty("User-Agent","NetFox"); {{DW P-v4 kD;BwU[ ]c5GG!E-g int responseCode=httpConnection.getResponseCode(); r?V|9B`$p if(responseCode>=400) mU&J,C { ;8b f5 processErrorCode(responseCode); Y2$%%@ return -2; //-2 represent access is error b'{D4/ } YT:5J%" .HtDcGp 9Pb0Olh String sHeader; vOP[ND=T ohh 1DsB OQsH,' for(int i=1;;i++) =q"3a9pb7 { Ahebr{u //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); uC;@Yi8 //Utility.log(in.readLine()); ss2:8up 99 sHeader=httpConnection.getHeaderFieldKey(i); 6% ,Q if(sHeader!=null) Y.C*|p# { QnGJ4F if(sHeader.equals("Content-Length")) } M~AkJL { (?3(=+t nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); dvj`%?= break; ,,iQG' * } "M*\,IH } '/p5tw8 else I%s/h4x^B[ break; QTyl=z7 } $ `ho+ } #e0+;kBh catch(IOException e){e.printStackTrace ();} jf2E{48P catch(Exception e){e.printStackTrace ();} 3~S~)quwP Yp;x "{:*fI;! Utility.log(nFileLength); 7vWB=r>5@ ~gAx HYY|)Wo return nFileLength; [p(C:rH } ;}PL/L$L6; /;>EyWW
6$Dbeb //保存下载信息(文件指针位置) KVntBe]I private void write_nPos() ~lL($rE { %$}iM< try{ SVHtv0Nx output = new DataOutputStream(new FileOutputStream(tmpFile)); a&<<X:$Hy output.writeInt(nStartPos.length); s6
^JgdW for(int i=0;i<nStartPos.length;i++) O|/tRkDMP{ { lDA%M3(p // output.writeLong(nPos); ~& l`" output.writeLong(fileSplitterFetch.nStartPos); 3A9|{Vaz+6 output.writeLong(fileSplitterFetch.nEndPos); {!4%Z9G } aD:+,MZ output.close();
aqN.5'2\ } 5Tu.2.)N catch(IOException e){e.printStackTrace ();} n#R!`*[ catch(Exception e){e.printStackTrace ();} Ea
!j-Lb o } Owr`ip\ G@;aqe[dB =os j}( //读取保存的下载信息(文件指针位置) {J]|mxo private void read_nPos() ,s)H% { ~E\CAZ try{ BOG )JaDW DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); x{- caOH int nCount = input.readInt(); +1y#=iM{ nStartPos = new long[nCount]; *SW,pHYnLb nEndPos = new long[nCount]; @PI\.y_w for(int i=0;i<nStartPos.length;i++) F,bl>;{[{ { t>[r88v nStartPos = input.readLong(); h
Na<LZ nEndPos = input.readLong(); wVVe L$28 } AjS5 input.close(); oMVwIdf } 4M]8po/; catch(IOException e){e.printStackTrace ();} )<|T Ep4r- catch(Exception e){e.printStackTrace ();} Q&J,"Vxw } : ?V; ?-f>zx8O uu:)jx i private void processErrorCode(int nErrorCode) Dn[1BWM/7 { p%s
D>1k System.err.println("Error Code : " + nErrorCode); JjmL6(*ui } ymzm x$o= S;NXOsSu HT&0i,` //停止文件下载 zxh"@j$? public void siteStop() =
` ^jz} { jmFN*VIL bStop = true; NR*SEbUU* for(int i=0;i<nStartPos.length;i++) >g[W@FhT'k fileSplitterFetch.splitterStop(); QJ>>&`{, a:fHTU=\p 2
zy^(%a } :QVGY^c } --9mTqx //负责部分文件的抓取 qj1z>,\ **FileSplitterFetch.java T)u w2 */ ]ok>PH] package NetFox; cC4T3]4l' Zx_m?C_2_ e-VLU; import java.io.*; !r|X6`g import java.net.*; j#& >=V+X"\Z ueR42J%s public class FileSplitterFetch extends Thread { .bE,Q9: ,B2-'O zgqw*)C~ String sURL; //File URL ;i9CQ0e? long nStartPos; //File Snippet Start Position a3;.{6el)H long nEndPos; //File Snippet End Position $c}0L0 int nThreadID; //Thread's ID }$-VI\96 boolean bDownOver = false; //Downing is over a%dx\&K boolean bStop = false; //Stop identical pd#/;LT FileAccessI fileAccessI = null; //File Access interface Xo`1#6xsE AJT0)FCpR
,<1* public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6"7qZq { +2SX4Kxu this.sURL = sURL; Iqsk\2W]a3 this.nStartPos = nStart; `y`xk<q this.nEndPos = nEnd; L?0l1P nThreadID = id; F(<8:`N;G fileAccessI = new FileAccessI(sName,nStartPos);//定位 \ax%I)3 } }kj6hnQ {Fi@|' :j~5(K" public void run() @m V C { {rT`*P~ while(nStartPos < nEndPos && !bStop) o!~bR
{ to3J@:V8e >| ?T| [R4x[36Zp try{ ;X(n3F URL url = new URL(sURL); ?_aR-[XRg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); spJ(1F{|V httpConnection.setRequestProperty("User-Agent","NetFox"); I*}#nY0+ String sProperty = "bytes="+nStartPos+"-"; C t)MvZ httpConnection.setRequestProperty("RANGE",sProperty); sh ;uKzQ Utility.log(sProperty); Rs`a@Fn &>e DCs YJ$ewK4E#. InputStream input = httpConnection.getInputStream(); B5:g{,C //logResponseHead(httpConnection); F-^HN% `VtwKt* G+uiZ(p> byte[] b = new byte[1024]; s{e(- 7' int nRead; Ug21d42Z4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^d80\PXz { :eW~nI.Vc nStartPos += fileAccessI.write(b,0,nRead); P0xLx //if(nThreadID == 1) !dY:S';~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bZ.N7X PH } u4@e=vWI 6>:~?gs |L;psK Utility.log("Thread " + nThreadID + " is over!"); xV#a(>-4 bDownOver = true; K;[%S //nPos = fileAccessI.write (b,0,nRead); AxlFU~E4 } GYC&P] catch(Exception e){e.printStackTrace ();} wkD:i 2E7 } (0W}e(D8
} jJZsBOW[8 8%<`$`FyU 8/"|VE DOr //打印回应的头信息 7Zt\G-QV public void logResponseHead(HttpURLConnection con) gvNZrp>e! { -j_I_ for(int i=1;;i++) :(>9u.>l?5 { |xZcT4 String header=con.getHeaderFieldKey(i); mE`qvavP|/ if(header!=null) >&QH{!( //responseHeaders.put(header,httpConnection.getHeaderField(header)); {X<4wxeTo Utility.log(header+" : "+con.getHeaderField(header)); xn@0pL3B~ else *ldMr{s<R break; U5!f++ } q9Sz7_K } -Zg @D(pF Reu{
b$O_L4CP public void splitterStop() 9K':Fn2, { lt6;*z[ bStop = true; j yRSEk$ } =nx:GT3&[ -'[(Uzj <{420 } +RV- VrV :KSor}t JhCkkw /* N4mJU'_{ **FileAccess.java +xfW`[.{ *//文件访问(定位,写) +'/}[1q1/T package NetFox; (\t_Hs::a import java.io.*; ZuvPDW% V.ji
_vX rLh9`0|D public class FileAccessI implements Serializable{ VS|("** X@qk> / //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UIOEkQ\Wl RandomAccessFile oSavedFile; Z.':&7Y long nPos; ggI=I<7M s)YP%vn# Y^2Qxo3"3 public FileAccessI() throws IOException u:$x6/t { j-YJ." this("",0); 96pk[5lj{? } ]}[Yf q|o|/ O-{ Y/,$Y]%g public FileAccessI(String sName,long nPos) throws IOException wD],{ y { nS+FX&_ oSavedFile = new RandomAccessFile(sName,"rw"); *Z`XG_ s5 this.nPos = nPos; Ah>gC!F^ oSavedFile.seek(nPos); o}MzqKfu } Sf&?3a+f jD/7/G* QW~5+c9JJ public synchronized int write(byte[] b,int nStart,int nLen) a3UPbl3^ { /Pn.)Lxfl int n = -1; {(Og/[ try{ *SkiFEoD oSavedFile.write(b,nStart,nLen); j\'+wVyo n = nLen; px|>v8 } 1Vf78n catch(IOException e) oY%"2PW1B { X#DL/#z k e.printStackTrace (); ')5L_$ } J4G> E.8 lMwk.# [.;%\>Qk< return n; Kr/h`RM } qA/#IUi)1 mT6q}``vtG /e|[SITe } Jf?S9r5 Q Er"R;l]xJ LgP> u?]n /* %e
Sm&` **SiteInfoBean.java y98JiNq */ \ I^nx+l package NetFox; W ""*hJ O[IR| 4r1<,{gCS public class SiteInfoBean { NTm<6Is` RQ^m6)BTo CYt jY~ private String sSiteURL; //Site's URL |
"Jx private String sFilePath; //Saved File's Path j?\$G.Y private String sFileName; //Saved File's Name >'aG/( private int nSplitter; //Count of Splited Downloading File d$fvg8^ "($Lx 7-".!M public SiteInfoBean() 6[*;M {//nSplitter的缺省值为5 4[TS4p //default value of nSplitter is 5 %'L].+$t this("","","",5); djsz!$ } K/vxzHSl 894r;UA7 V(;55ycr public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) m7r j>X Y { W?qpnPW sSiteURL= sURL; uw Kh sFilePath = sPath; VY/|WD~"CW sFileName = sName; j-J(C[[9 this.nSplitter = nSpiltter; 5^i.;>(b ,<@,gZru ]<27Sw&yaG } nW|'l^& |} K E?Zb~xk public String getSSiteURL() I %|@3=Yc { %cH8;5U40 return sSiteURL; |XKOXa3. } ^I X%dzM _1>SG2h{fV fav5e'[$ public void setSSiteURL(String value) oL<BLr9> { PXw|
L sSiteURL = value; "7=bL7wM& } ;asm 0H( z,pNb%*O -#LjI. public String getSFilePath() X=v~^8M7% { 5>k>L*5J return sFilePath; wgY6D!Y } }m6f^fs} ?gLR<d_ [IiwN qZ[~ public void setSFilePath(String value) ,YjxCp3 { 9s!
2 wwh sFilePath = value; /~40rXH2C } Hm>-LOCcl t]s94 R q JOBz{;:R{ public String getSFileName() 8r,9OM { m_a^RB( return sFileName; -=>sTMWpr } Hx$.9'Oq\Q L-#e?Y}$J (O$}(Tn public void setSFileName(String value) D =$4/D:; { }@d>, 1DU sFileName = value; r0>q%eM8 } N83!C=X' l+%Fl=Q2em SOVjEo4'3 public int getNSplitter() >Q;
g0\I_ { O?CdAnhQc` return nSplitter; :^n*V6.4 } YWEYHr;%^? 6`acg'sk>
:-z&Y492 public void setNSplitter(int nCount) K[kds` { H4t)+(:D' nSplitter = nCount; Zr=ib } 7 0_}S*T } ^f9>l;Lb p"2m90IO Cl,9yU)1n /* >-b&v $ **Utility.java *-0>3 */ 0; 7#ji
package NetFox; `|nH1sHFq `%e|$pK U_]=E<el public class Utility { B`i$Wt<7 j_p`Ng !x>,N%~ public Utility() 69>/@< { ymYBm:" :$Q`>k7A kVd5,Qd } 0Z"s_r}h jgG$'|s} //线程睡眠 6D|p Qs public static void sleep(int nSecond) /hL\,x2 { g0PT8]8 try{ E, GN| l Thread.sleep(nSecond); Qlw>+y-i } 9TC)
w| catch(Exception e) 58: :h.: { ~(P&g7u e.printStackTrace (); 09'oz*v{# } uQnT[\k? } H9U.lb {Ur7#h5 //日志 @Gt`Ds9= public static void log(String sMsg) V@[rf<, { m^<p8KZ System.err.println(sMsg); |jsb@ } uAUp5XP|Z S`0NPGn;@[ dN< ,%}R public static void log(int sMsg) $E\^v^LW { >TY6O.] System.err.println(sMsg); R::zuv } \8e2?(@"k } L_~8"I_ (-,>qMQs ;r.EC}>m /* Lkn4<'un **TestMethod.java -jB3L: */ TkRmV6'w package NetFox; ziiwxx_ "oR@JbdX \9`#]#1bx5 public class TestMethod { -U>y 7/aOsW"6 1yMr~Fo public TestMethod() Or8kp/d { ///xx/weblogic60b2_win.exe b5<okICD try{ 22&;jpL'?
SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); /`3#4=5- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); FQk!d$BG SiteFileFetch fileFetch = new SiteFileFetch(bean); ?{6s58Q{ fileFetch.start(); I`T1Pll } BJk
Z2= catch(Exception e){e.printStackTrace ();} H}/05e Wpr
,jN8b uR$i48} } 1y(UgEg \F{:5,Du) :5b0np! public static void main(String[] args) ~E)fpGJ { WF[bO7: new TestMethod(); F'FP0t!S } O6X"RsI} } 2: SO_O4C 点击下载更多相关资料
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