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/* |Syulus **SiteFileFetch.java >%c>R'~h */ <SSkCw package NetFox; r_Pi)MPc import java.io.*; C!|Yz=e import java.net.*; fjqd16{Q O]?PC^GGY !)EYM&:Y public class SiteFileFetch extends Thread { 2zkOs: 15kkf~Z<t D0X!j,Kc SiteInfoBean siteInfoBean = null; //文件信息Bean +o K*5 Y long[] nStartPos; //开始位置 #?DoP]1Y long[] nEndPos; //结束位置 ($,qxPOn FileSplitterFetch[] fileSplitterFetch; //子线程对象 N@I=X-7nh| long nFileLength; //文件长度 TV?MB(mN boolean bFirst = true; //是否第一次取文件 ey`E
E/WV boolean bStop = false; //停止标志 ;y-sd?pAk File tmpFile; //文件下载的临时信息 |0VZ1{=* DataOutputStream output; //输出到文件的输出流 +-Z `v Bh65qHQO //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) E_#?;l> public SiteFileFetch(SiteInfoBean bean) throws IOException ^K:-r !v^ { |}o3EX siteInfoBean = bean; 2I_~]X53[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3yLJWHO%W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); U<6+2y P if(tmpFile.exists ()) 9[:TWvd { #1p\\Av bFirst = false; wAc;{60s] read_nPos(); ;eW\41 w } 5 i=C?W`' else 5a5)hmO RB { T1(*dVU? nStartPos = new long[bean.getNSplitter()]; CEBa,hp@ nEndPos = new long[bean.getNSplitter()]; gCx#&aXS } 2u(G:cR gvFCsVv<{ 7Q?^wx a2eE!I } ,hE989x<iI _>4)q= nNh5f]] public void run() @el { pz]!T' //获得文件长度 EvF[h:C2 //分割文件 v4,Dt //实例FileSplitterFetch *$@u`nM //启动FileSplitterFetch线程 A}(o1wuw //等待子线程返回 H`rd bE try{ (btmg<WT" if(bFirst) H4<Q}([w { V+t's*9o3 nFileLength = getFileSize(); l\ VrD2j8 if(nFileLength == -1) $t0JfDd6Ky { _7'5I A System.err.println("File Length is not known!"); upGLZ# } _IWLC{%V else if(nFileLength == -2) gKtgW&PYm { Cl!9/l?z System.err.println("File is not access!"); [OR"9W& } bbT$$b- else DTHWL { P=Su)c for(int i=0;i<nStartPos.length;i++) z#2n+hwE { |^"0bu" nStartPos = (long)(i*(nFileLength/nStartPos.length)); S:1g(f*85 } ,(NN)Oj for(int i=0;i<nEndPos.length-1;i++) h=B=
J { >~_)2_j nEndPos = nStartPos[i+1]; eg24.W9c } N! I$Qtr, nEndPos[nEndPos.length-1] = nFileLength; R[OXYHu } MfO:BX@$ } J M`[|"R% Rx?ze( I
moxg+u
//启动子线程 my#\(E+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; R[@}Lg7+v for(int i=0;i<nStartPos.length;i++) X!m
lC51 { ],Yy)<e. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3cF8DNh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /*MioaQB}p nStartPos,nEndPos,i); _PSOT5{ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (p<pF]. fileSplitterFetch.start(); }b/P\1#z } Nnq1&j"m // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iUk#hLLC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); zE~Xxp // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", o7@C$R_# nEndPos = " + nFileLength); zjOOEvi // fileSplitterFetch[nPos.length-1].start(); cQm4q19 K~B =}.gU WV //等待子线程结束 P>(FCX //int count = 0; ;; ;=)'o //是否结束while循环 n~.$iN boolean breakWhile = false; GxEShSGOE wxYGr`f ZB`d&!W> while(!bStop) 6@eF|GoP { :>U+HQll write_nPos(); E;[Uhh|78! Utility.sleep(500); GP^.h kVs breakWhile = true; 'by+hXk 4u+0 )< uqLP$At for(int i=0;i<nStartPos.length;i++) dCeLW { Nd&UWk^ if(!fileSplitterFetch.bDownOver) XK})?LTD
{ Keem\/ breakWhile = false; ZJ.an%4 break; SMzq,?-` } n2EPx(~ } Hq!|r8@6 if(breakWhile) *ifz@8C } break; 5{Q9n{dOh p4
=/rkq ,Vw>3|C //count++; hS&l4 \I'Z //if(count>4) ,~DV0#" // siteStop(); ZvMU3])u } um}q @BU &BRa5`
|Wjpnz System.err.println("文件下载结束!"); cnI5G! } @bJIN]R catch(Exception e){e.printStackTrace ();} -$DfnAh } v; R2,`[W xiDgQTDz 8;r #HtFM //获得文件长度 *0to,$ n public long getFileSize() i;-M8Q^ { dDIR~!T int nFileLength = -1; ]!&$&t8. try{ Y~e)3e URL url = new URL(siteInfoBean.getSSiteURL()); <f M}Kk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Fm,` ]CO httpConnection.setRequestProperty("User-Agent","NetFox"); `j(._`8%a /R&h#;l O1S7t)ag int responseCode=httpConnection.getResponseCode(); CH&{x7$he
if(responseCode>=400) ml<tH2Qx3C { .Z
67 processErrorCode(responseCode); y^ |u'XK return -2; //-2 represent access is error ],k~t5+ } ][
I OlR 9@yF7 sRA2O/yKCE String sHeader; U3Z=X TB t ^[fu, m|F1_Ggz for(int i=1;;i++) ^6 z"@+;* { =$fz</S=J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); KmTFJ,iM //Utility.log(in.readLine()); w"wW0uE^ sHeader=httpConnection.getHeaderFieldKey(i); b^Re947{g if(sHeader!=null) gXJBb+P
{ QA*<$v if(sHeader.equals("Content-Length")) e6Y>Bk { t>/x-{bH\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )*>wa%[-q break; cw{TS } y<E];ub } sQac%.H;`U else dC{dw^ break; k$JOHru } *LU/3H|} } q]I aRho catch(IOException e){e.printStackTrace ();} j~G(7t catch(Exception e){e.printStackTrace ();} b%%r`j,'JE {;u,04OVK 0B7G:X0 Utility.log(nFileLength); !@F { FR hHU=lnO ^2nrA pF return nFileLength; %,_ZVgh0 } Xt<1b lz~^*\ F %DYh<U4N //保存下载信息(文件指针位置) "(7y%TFt: private void write_nPos()
}o*A>le { )q-NE) try{ Syy{ ^Ae} output = new DataOutputStream(new FileOutputStream(tmpFile)); rZJJ\ , | output.writeInt(nStartPos.length); e,/]]E/o for(int i=0;i<nStartPos.length;i++) ZK+F<} { jDpA>{O[ // output.writeLong(nPos); 94BH{9b5 output.writeLong(fileSplitterFetch.nStartPos); ={sjoMW output.writeLong(fileSplitterFetch.nEndPos); uR5+")r@S } 3NLn} output.close(); g"1V] } jts0ZFHc- catch(IOException e){e.printStackTrace ();} iX]OF.: catch(Exception e){e.printStackTrace ();} J<QZ)<T,& } TA-2{=8 :LY.C<8 JM|HnyI //读取保存的下载信息(文件指针位置) jJ$B^Y"4 private void read_nPos() !SW0iq[7j { <@KIDZYC try{ \ +%~7Bi]z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~p?ArZb int nCount = input.readInt(); XNWtX-[^@ nStartPos = new long[nCount]; e^>>"tr nEndPos = new long[nCount]; ~3?-l/ $ for(int i=0;i<nStartPos.length;i++) V%r`v%ktF { /DHgwpJ nStartPos = input.readLong(); hbH~Ya=+S nEndPos = input.readLong(); <v|"eq} } ,bl }@0A input.close(); ]yf?i350 } kk-<+R2 catch(IOException e){e.printStackTrace ();} RTcxZ/\"# catch(Exception e){e.printStackTrace ();} dDpAS#'s\ } (4cdkL .Rk8qRB .cHgYHa private void processErrorCode(int nErrorCode) k
i<X ^^ { 9f( X7kt System.err.println("Error Code : " + nErrorCode); :}zyd;Rc } |NZi2Bu v"o"W[ Wn(!6yid //停止文件下载 U]sAYp^$ public void siteStop() SWV*w[X<X { U.Mfu9}#: bStop = true; )OV0YfO for(int i=0;i<nStartPos.length;i++) [! $NTt_ fileSplitterFetch.splitterStop(); Y7}Tuy dC Xkhd"Axi a.Z@Z!* } noxJr/A] } eut2x7Z(c //负责部分文件的抓取 iQgg[
) **FileSplitterFetch.java 8@m$(I+ */ 5
3%>)gk: package NetFox; 2F:qaz u;_h%z5K 7EE{*}?0E import java.io.*; fZo#:"{/K import java.net.*; T?pS2I~ 8Agg%*Qs} smf"F\Ws public class FileSplitterFetch extends Thread { (?r,pAc: $ZBYOA yDafNH String sURL; //File URL A9MM^jV8 long nStartPos; //File Snippet Start Position <giBL L! long nEndPos; //File Snippet End Position 10FiA; int nThreadID; //Thread's ID |:1{B1sqA boolean bDownOver = false; //Downing is over .xsfq*3e5 boolean bStop = false; //Stop identical N; g@lyo FileAccessI fileAccessI = null; //File Access interface ^<CVQ8R7 `pfIgryns *U[yeE]. public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @Dh2@2`> { FOXSs8"c]! this.sURL = sURL; LORcf 1X/ this.nStartPos = nStart; k7CKl;Fck this.nEndPos = nEnd; YZg#H)w% nThreadID = id; t WI- fileAccessI = new FileAccessI(sName,nStartPos);//定位 AoS7B:T;! } ~5N}P>4* 7Z< ~{eD, FDz`U:8 public void run() HT;^u"a~ { bE _8NA"2 while(nStartPos < nEndPos && !bStop) 8>v_th { w>%@Ug[" wh8';LZ>R S[Du
> try{ }D#:NlMp URL url = new URL(sURL); DzAZv/h76 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;V}:0{p httpConnection.setRequestProperty("User-Agent","NetFox"); CxFd/X, String sProperty = "bytes="+nStartPos+"-"; %!<Y httpConnection.setRequestProperty("RANGE",sProperty); ;77K1 Utility.log(sProperty); |\,OlX, &xnQLz:# vF27+/2+R InputStream input = httpConnection.getInputStream(); XnyN*}8 //logResponseHead(httpConnection); QKG3>lU 3Qy@^" CvoFt=c$jE byte[] b = new byte[1024]; npdljLN int nRead; 928_e)V while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ue_wuZi { I^y<W%Et nStartPos += fileAccessI.write(b,0,nRead); UY',n, //if(nThreadID == 1) ^jL '*&l // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R
BYhU55B } |6E_N5~ }Pcm'o_wT Og\k5.! , Utility.log("Thread " + nThreadID + " is over!"); 9bM\ (s/
bDownOver = true; <Riz!(G //nPos = fileAccessI.write (b,0,nRead); 5C Dk5B_ } [4z,hob catch(Exception e){e.printStackTrace ();} p#@ #$u- } VfoWPyWD# } _ \D% 2cMCZuO n|i:4D //打印回应的头信息 Rf:.'/<^ public void logResponseHead(HttpURLConnection con) l(t&<O(m9 { AC,RS7 for(int i=1;;i++) -o ).< { FdU]!GO-X String header=con.getHeaderFieldKey(i); ]\(8d[4 if(header!=null) s4|\cY`b- //responseHeaders.put(header,httpConnection.getHeaderField(header)); 7r:h_r- Utility.log(header+" : "+con.getHeaderField(header)); QN:v4,$d else vF72#BNs break; kK? SG3 } PYkhY;* } M+/G>U Vj*-E
^CkMk 1 public void splitterStop() H1bR+2s { I3t5S;_8 bStop = true; #D`@G8~( } XM$~HG gmGK3am y4^u&0}0$ } G3.aw `w@:h4f /"{d2 /* rAenxZ,tF **FileAccess.java mWp>E`l *//文件访问(定位,写) zggnDkC5 package NetFox; J@3, import java.io.*; ^m>4<~/ /fI}QY1 S=UuEmU5N public class FileAccessI implements Serializable{ cAWn*% =xI;D,@S //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 IKD{3cVL RandomAccessFile oSavedFile; - x long nPos; 9[0iIT$q$ v] m/$X2 NoI|Dz public FileAccessI() throws IOException xTHD_?d {
WTSh#L this("",0); yaUtDC.| } pjeNBSu6 sZ `Tv[ AxEyXT( h5 public FileAccessI(String sName,long nPos) throws IOException &G{GLP?H { &o:5lxR{ oSavedFile = new RandomAccessFile(sName,"rw"); q
W(@p` this.nPos = nPos; M:+CW;||! oSavedFile.seek(nPos); ,-UF5U } KOcB#UHJ Bkcwl ;: ;E|{e public synchronized int write(byte[] b,int nStart,int nLen) UK =ELvt] { ,.,8-In^ int n = -1; .;? Bni try{ DX_mrG oSavedFile.write(b,nStart,nLen); z:QDWH n = nLen; :'%6 } g4?2'G5m? catch(IOException e) }lZEdF9GhG { GBJLB e.printStackTrace (); bvox7V> } "HOZ2_(o Sn=6[RQ>P 3smkY return n; T4eJ:u* ; } #6 M]tr 5y#,z`S E_,/)U8 } *^?tr?e%I< .LzA'q1+z te@m#`p9 /* T;w:^XW **SiteInfoBean.java [,=?e */ P\U<,f package NetFox; qt8Y3:=8l *!5CL' MAa9JA8kw) public class SiteInfoBean { u~uzKG ]c(FgYc +R'8$ private String sSiteURL; //Site's URL 6N/(cUXJ private String sFilePath; //Saved File's Path ghQ B private String sFileName; //Saved File's Name ?t/qaUXN private int nSplitter; //Count of Splited Downloading File (,Y[2_Zv -&/?&{Q0 85<k'>~L public SiteInfoBean() ZrN(Mp {//nSplitter的缺省值为5 &;PxDlY5 //default value of nSplitter is 5 ^y5A\nz& this("","","",5); [$y(>]~. } dX[I
:,z* j=sfE qN). TKZtoQP% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) TOG:`FID { 7[ ovEE54 sSiteURL= sURL; +gl\l?>sr sFilePath = sPath; Y\
[|k-6
sFileName = sName; Aztrq this.nSplitter = nSpiltter; F^dJ{<yX 2BccE WK%cbFq( } XYcZ;Z 9: I9?\Jbqg +Mj6.X public String getSSiteURL() ; lMv xt: { 0R?1|YnB return sSiteURL; 5`h 6oFxGp } @c~Z0+Ji >X~B1D,SV7
*yZ6" public void setSSiteURL(String value) Ww<Y]H$xZ< { 4D65VgVDM sSiteURL = value; 1*O|[W } 0]d;)_`@ [YvS#M3T M9"Bx/ public String getSFilePath() U9
iI2$ { H,>
}t
S return sFilePath; (-C)A-Uo& } A 3 V C:Ef6ZW u]ms~rO public void setSFilePath(String value) K^WDA]) { .; MS78BR sFilePath = value; 1RAkqw<E } f+e"`80$*C n_kwtWX( \8CCa(H public String getSFileName() >}SEU-7&\ { GcO2oq return sFileName; `KQx#c>' } {B$CqsvJ 80nE QT
y 7L~*%j public void setSFileName(String value) :WB uU { '#Wx@ sFileName = value; M=,pn+}y> } %&L13: b++r#Q
g ,_V V;P public int getNSplitter() BJ
UG<k { :zL)O return nSplitter; .}__XWK5 } CW1l;uwtU 9p_?t'&>q @a8lF$< public void setNSplitter(int nCount) Tm"H9 { p4T$(]7 nSplitter = nCount; ')jItje| }
'|H+5# } -Y_,
.'ex S,5ok0R t$BjJ -G /* x?AG*'
h& **Utility.java yY VR]H H */ p]aEC+q package NetFox; qT#e
-.G ) .KA0- 5]O{tSj public class Utility { gWj-@o\ O:?3B!wF ;yNc7Vl public Utility() H(y`[B,}* { \%7*@& /,G `V TPp]UG } M+ [ho] ~kW?]/$h //线程睡眠 JBY.er`6C public static void sleep(int nSecond) Nh\vWAz9 { 'rhgM/I try{ Lu#q o^ Thread.sleep(nSecond); ,z&S;f.f } R+LKa Z catch(Exception e) 1Vpti4OmU { rC8p!e.yL e.printStackTrace (); #-yCR } Lx,=Up. } >)M{^ Z],j|rWy6 //日志 ;21D ^e public static void log(String sMsg) ytttF5- { Odwe1q& System.err.println(sMsg); +O/b[O'0 } 2^r~-> MblRdj6 2cCiHEL # public static void log(int sMsg) `n&:\Ib { zQ,rw[C"W System.err.println(sMsg); R4p Pt } ]-gyXE1.r } Tpl]\L1v-
0pE>O7 D:T]$<=9 /* i{^T;uAE **TestMethod.java &ijz'Sg3 */ ]dUG=dWO package NetFox; _a$qsY bYsX?0T!p Y4k2=w:D public class TestMethod { lDL&":t `2Pa{g-. BqNsW
(+ public TestMethod() 6ll!7U(9( { ///xx/weblogic60b2_win.exe
VWft/2p~ try{ 5/"$_7"{a SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~i|6F~%3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); b,'O|s]"Sc SiteFileFetch fileFetch = new SiteFileFetch(bean); 01A{\O1$j fileFetch.start(); 9q'&tU'a=c } X%yG{\6: catch(Exception e){e.printStackTrace ();} :[CV_ME.; }$_@yt<{W@ 8?Zhh. } C hF~ Y-ao
yoNS UGAV"0 public static void main(String[] args) t6"%u3W8M { 6?a`'& new TestMethod(); l*l*5hA } _=mzZe[ } '|[!I!WB` 点击下载更多相关资料
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