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/* 37?X@@Z= **SiteFileFetch.java EFI!b60mc */ Tyaqa0 package NetFox; ]lyQ*gM import java.io.*; NW;_4g4qE import java.net.*; u^]Gc p n.NWS/v_{ RZq_}-P,.c public class SiteFileFetch extends Thread { q2`mu4B P<[)
qq@; kt_O= SiteInfoBean siteInfoBean = null; //文件信息Bean @Ss W long[] nStartPos; //开始位置 *M`,# long[] nEndPos; //结束位置 ~X<$l+5 FileSplitterFetch[] fileSplitterFetch; //子线程对象 .)%,R long nFileLength; //文件长度 ~^'t70 :D boolean bFirst = true; //是否第一次取文件 ,+v(?5[6 boolean bStop = false; //停止标志 x@O)QaBN! File tmpFile; //文件下载的临时信息 lF46W DataOutputStream output; //输出到文件的输出流 [z7]@v6b iDgc$'%? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -R];tpddR5 public SiteFileFetch(SiteInfoBean bean) throws IOException G i( { Cl&)# siteInfoBean = bean; 4/3w
* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \f Kn} ]kG tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ei1;@k/ if(tmpFile.exists ()) b"td]H3h { fh1-]$z`~ bFirst = false; 9Ou}8a?m"
read_nPos(); YFj#{C. } ;F%EW`7 else B 2_fCSlg { oL>o*/ nStartPos = new long[bean.getNSplitter()]; d%q&[<'jf nEndPos = new long[bean.getNSplitter()]; n^qwE } `)w=@9B)" G'wW-| AhjCRYk+ g.8^ )u } =mcQe^M n
>E1\($ *N{k#d/ public void run() u!It';j { Sc}Rs //获得文件长度 x|^p9m"=% //分割文件 YReI|{O$c //实例FileSplitterFetch ?TW? 2+ //启动FileSplitterFetch线程 "_BWUY //等待子线程返回 j2:9ahW
try{ ?wIEXKI if(bFirst) s6;ZaU { tdu:imH~ nFileLength = getFileSize(); A+\rGVNH'S if(nFileLength == -1) e!C,<W&B\ { *U8,Q]gS System.err.println("File Length is not known!"); wA,-!m } &g*1 If else if(nFileLength == -2) @l_rB~ { c5KciTD^ System.err.println("File is not access!"); w'xPKO$bzR } 1guiuR4 else s{Y-Vdx { DmB?.l- for(int i=0;i<nStartPos.length;i++) hS%oQ)zvE { lPA}06hU nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ts=TaRwWf } \qG` ts for(int i=0;i<nEndPos.length-1;i++) CA$|3m9)NM { X6r<#n|l nEndPos = nStartPos[i+1]; zY4y]k8D* } Fy6Lz.baB nEndPos[nEndPos.length-1] = nFileLength; ?g*.7Wc } L0%W;m } <{Rz1CMc 'XYjo&w =6fJUy^M\ //启动子线程 l
u{6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M4d4b for(int i=0;i<nStartPos.length;i++) :V)=/mR { ):L0{W{ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (J(SwL| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), YXU2UIY<~ nStartPos,nEndPos,i); ]yFO~4Nu Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ] J|#WtS fileSplitterFetch.start(); !\Xrl) $j{ } $c+:dO|Fb // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wwa)VgoS[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); tjne[p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ojIGfQV nEndPos = " + nFileLength); )g U#[}6H // fileSplitterFetch[nPos.length-1].start(); g+4x uXG$YDKqC sbhUW>%. //等待子线程结束 C,<FV+r=^ //int count = 0; oHu 7<r //是否结束while循环 S\k(0Sv9D boolean breakWhile = false; _.W;hf` h}oV)z6 %;GRR (K while(!bStop) #Qu|9Q[QH { +ul.P)1J6 write_nPos(); T{'oR .g, Utility.sleep(500); G{a_\'7 breakWhile = true; es$<Vkbp |Ur$H!oe?' ]<_v;Q<t for(int i=0;i<nStartPos.length;i++) s|:j~>53 { bWZzb& if(!fileSplitterFetch.bDownOver) eQ=6< ^KZ { 9A\\2Zz6F breakWhile = false; AC?a:{./ break; !]z4'* )W } O&dh< } W#x~x| (c if(breakWhile) [F,s=,S'M break; 0v3
8LBH) v/Xz.?a\jF j4(f1 //count++;
G98f Bw //if(count>4) IfCa6g<&( // siteStop(); 0A75)T=lQ } Bthp_cSmLs ? y[i6yN9 4(8BWP~.y2 System.err.println("文件下载结束!"); O<?.iF% } 7VfPS5se catch(Exception e){e.printStackTrace ();} U\"FYTC } v dU) jhka;m FaG&U //获得文件长度 srS5-fs public long getFileSize() ,esUls'nz' { [O3)s] | int nFileLength = -1; 9*[!ux7h try{ |7miT!y8 URL url = new URL(siteInfoBean.getSSiteURL()); 4tp} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )u=a+T httpConnection.setRequestProperty("User-Agent","NetFox"); /jn0Xh
[Lid%2O3ZR 19\
V@d^ int responseCode=httpConnection.getResponseCode(); i6:O9Km if(responseCode>=400) 7{OD/*| { a#/~rNRY processErrorCode(responseCode); 6lQP+! EF return -2; //-2 represent access is error RJD(c#r$ } ooN?x31 >#5jO9 m*>gG{3; String sHeader; }FkF1?C :-T[)Q+-3 +,4u1`c|$ for(int i=1;;i++) ^
`[T0X { QM=Y}
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); '#612iZo //Utility.log(in.readLine()); A+"'8%o9} sHeader=httpConnection.getHeaderFieldKey(i); Es1T{<G|w if(sHeader!=null) *HQ>tvUh { zi+NQOhR if(sHeader.equals("Content-Length")) "Q1oSpF { W`jKe-jF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); lnrs4s Km break; =n_>7@9l } &^F'ME } -EWC3,3 else 4FJA+ break; SA,+oq( } ded:yho } )p
8P\Rl catch(IOException e){e.printStackTrace ();} ]l=iKl catch(Exception e){e.printStackTrace ();} aydf# [F *#o2b-[V ])Z p|?Y Utility.log(nFileLength); W!b'nRkq ,+'VQa"] -^$IjK-N return nFileLength; <
_<?p& } \|R\pS}4 k6|/ ik9C 7,R
~2ss5z //保存下载信息(文件指针位置) PED5>90 private void write_nPos() /9
|BAQ:v; { s[u*~A try{ U%aDkC+M output = new DataOutputStream(new FileOutputStream(tmpFile)); pT<I!,~ output.writeInt(nStartPos.length); -)!;45 for(int i=0;i<nStartPos.length;i++) 3\a VZx! { eY'RDQa // output.writeLong(nPos); 'F^"+Xi
output.writeLong(fileSplitterFetch.nStartPos); #UqE%g`J output.writeLong(fileSplitterFetch.nEndPos); 2;ac&j1 } &MJ`rj[% output.close(); J!5&Nc } #} `pj}tQ catch(IOException e){e.printStackTrace ();} cwI3ANV catch(Exception e){e.printStackTrace ();} S1_):JvV } tx}=c5 3q0S}<h al #i-b|J+% //读取保存的下载信息(文件指针位置) U{8x.CJ] private void read_nPos() 9&OhCrxW- { n@//d.T try{ NxN~"bfh DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); qE{L42 int nCount = input.readInt(); )bK3%>H# nStartPos = new long[nCount]; Y?JB%%WWI nEndPos = new long[nCount]; C&RZdh,$ for(int i=0;i<nStartPos.length;i++) %[k"A { OBnvY2)Ri nStartPos = input.readLong(); Qsr+f~"W nEndPos = input.readLong(); (bGk=q=M } NnO%D^P] input.close(); u~1 ,88&U } .N Z catch(IOException e){e.printStackTrace ();} eZmwF@ catch(Exception e){e.printStackTrace ();} kwrM3nq } }n?D#Pk, ]oyWJ#8 >$;,1N $bd private void processErrorCode(int nErrorCode) opon"{ { 3Hh u]5 System.err.println("Error Code : " + nErrorCode); #++D|oE } X ="]q|Z +pbP;zu c=4z+_ K //停止文件下载 B8?j"AF public void siteStop() Vu Ey`c { 1cd3m bStop = true; ~R~MC(5N[ for(int i=0;i<nStartPos.length;i++) Gn 1 fileSplitterFetch.splitterStop(); #e&LyYx4 snyA 7O'u5N } 9K=K,6
b } /Ca
M(^W //负责部分文件的抓取 #[sJKW **FileSplitterFetch.java ,?VYrL */ 8k?V&J ` package NetFox; LBnlaH. fY 10a_@x X@%4N< import java.io.*; zTfl#% import java.net.*; DfVSG1g 4\14HcTcK sxPvi0> public class FileSplitterFetch extends Thread { IgKrcpK#}? <P-AlHYV- a#+;BH1 String sURL; //File URL #[y2nK3zF long nStartPos; //File Snippet Start Position |5\:
E}1 long nEndPos; //File Snippet End Position 8j8~?=$a6Q int nThreadID; //Thread's ID Kj#h9e boolean bDownOver = false; //Downing is over MO
*7:hI boolean bStop = false; //Stop identical NX?6
(lO, FileAccessI fileAccessI = null; //File Access interface dXDuO Q VWVZ >l -z>m]YDH public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException SHqz&2u { N`7+]T this.sURL = sURL; /n3S E0Y this.nStartPos = nStart; P7;q^jlB this.nEndPos = nEnd; "QM2YJ55m` nThreadID = id; )H%RwV# fileAccessI = new FileAccessI(sName,nStartPos);//定位 be>KG ZU0 } vw/GAljflu pm:#@sl +"PME1 public void run() VoNk.h"T { K9S(Xip while(nStartPos < nEndPos && !bStop) XknbcA| { |i- S}M 1N +ju"2R gX/? try{ py9`q7F URL url = new URL(sURL); 9zaSA,} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7lG,.W| httpConnection.setRequestProperty("User-Agent","NetFox"); z<8WN[fB String sProperty = "bytes="+nStartPos+"-"; 6V-JyTcxGI httpConnection.setRequestProperty("RANGE",sProperty); ;:P}s4p Utility.log(sProperty); 3+V.9TL'a UZu.B!4 u\=yY. InputStream input = httpConnection.getInputStream(); &&te(DC\ //logResponseHead(httpConnection); Bx0=D:j 8!7`F.BX x^y&<tA byte[] b = new byte[1024]; __ G=xf int nRead; cd)}a_9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) sb</-']a { *TYOsD**9 nStartPos += fileAccessI.write(b,0,nRead); ]u"x=S93 //if(nThreadID == 1) =${ImMwj // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &e5,\TQ } MG74,D.f I 3dUI~}u kTo{W]9] Utility.log("Thread " + nThreadID + " is over!"); fs*OR2YG7 bDownOver = true; $H1igYc //nPos = fileAccessI.write (b,0,nRead); "Fqrk>Q~ } G_6!w// catch(Exception e){e.printStackTrace ();} #=I5_u } H2E'i\ } -<^3!C > kl#)0yqN0 oNRp //打印回应的头信息 p+Icq!aH5 public void logResponseHead(HttpURLConnection con) iL3k8:x { T0K*!j}O for(int i=1;;i++) p.!p6ve){ { ivPX_#QI String header=con.getHeaderFieldKey(i); _6C,w`[[6 if(header!=null) 4m6%HV8{}[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); '
y_2" Utility.log(header+" : "+con.getHeaderField(header)); =v~$&@ else @<44wMp break; Z^GXKOeq } h($Jo } DO
,7vMO tDNo; f (0zYS_mA public void splitterStop() l# |M.V6G { &F|Wk,y bStop = true; qQCds}<w } tMr$N[@r 2G}@s.iE ?,FL"ye } }Z% j=c"d LgA>,. AI3\eH+ /* nLBi}T **FileAccess.java !9EbG *//文件访问(定位,写) QykHB
k package NetFox; pcPRkYT[M import java.io.*; Is}?:ET RH&}'4JE: o.>Yj)U public class FileAccessI implements Serializable{ Rlx KL8WT6!RZ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 qnf\K} RandomAccessFile oSavedFile; bs_rw+ long nPos; _H$Z}2g<z ~D!Y]
SK 8iN@n8O public FileAccessI() throws IOException Hv|(V3- { {fu[&@XV this("",0); ufS0UD8%H } hPrE n16TQe"8 *ZF:LOnU public FileAccessI(String sName,long nPos) throws IOException s:Z1
ZAxv { gOm%?sg oSavedFile = new RandomAccessFile(sName,"rw"); 3H,>[&d this.nPos = nPos; n|!O .+\b oSavedFile.seek(nPos); No(S#,vJ; } 5
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Ox+}JB
[ public synchronized int write(byte[] b,int nStart,int nLen) ( ALsc@K { d$v{oC} int n = -1; 8:}$L)[V try{
3vF-SgCV oSavedFile.write(b,nStart,nLen); "
{Nw K n = nLen; S{qn^\0 } L'}^Av_+ catch(IOException e) Oa-~}hN { I}1<epd , e.printStackTrace (); t[x[X4 } 4mF=A$Q_/ 8!Q0:4Vb QlWkK.<Z3_ return n; ?+y# t? } pt8#cU\ 7'TXR[ g<N3 L [ } $
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V%3w7 /* vX"jL **SiteInfoBean.java gj1l9>f>]a */ aKkY) package NetFox; YX19QG%
He)dm5#fg UQ)7uYQ5 public class SiteInfoBean { ;X[23A{ p|R]/C0f Rj{D#5 private String sSiteURL; //Site's URL QD*(wj private String sFilePath; //Saved File's Path -vBk,;^> private String sFileName; //Saved File's Name ({p@Ay private int nSplitter; //Count of Splited Downloading File Op:7EdT# ED
R*1!d d)jX%Z$LC public SiteInfoBean() o$bD?Zn {//nSplitter的缺省值为5 dG'5: ,n/ //default value of nSplitter is 5 C$fQ[@ this("","","",5); j=TGe } K6z-brvw" K9f7,/ 1F }mlyS public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E9n7P'8 { %#b+ =J sSiteURL= sURL; ^tFgkzXm sFilePath = sPath; `PvGfmYOl sFileName = sName; T1pMe{ this.nSplitter = nSpiltter; vxx7aPjC 'C|yUsBC a+{95"4 } K>fY9`Whm gSu3\keF IDr$Vu4LCW public String getSSiteURL() E[E[Za^Y { RVb}R<yU+ return sSiteURL; Z
)dz } ZVmgQ7m OQZ\/~o 5 EL-1o02- public void setSSiteURL(String value) IEJp!P,E { 7U {g'< sSiteURL = value; [!E~pW%|n } ;yK:.Vg Z]Iyj
97 Gn%gSH/ public String getSFilePath() [sH[bmLR { JK9}Kb}; return sFilePath; {BKr/) H } H&zhYKw
SvR? nN| 4`+hX' public void setSFilePath(String value) Oy/+uw^ { {,rVA(I@ sFilePath = value; Zf%6U[{ T } ;qT7BUh(% ^atBf![ 27Ve $Q8]v public String getSFileName() v
J.sa&\H { sd~T return sFileName; =!%+ sem } I7nZ9n|KU Pkw` o # U4@W{P02 public void setSFileName(String value) 'F@#.Op` { /^z5;aG sFileName = value; wFJ?u?b0Q } lfp'D+#p{ .2
/$ !'E !xxu~j^T public int getNSplitter() v/yt C/WH" { R83Me#& return nSplitter; p4OiCAW; } =a.avOZ q"[8u ]j ^l\^\>8 public void setNSplitter(int nCount) 2!35Tj"RFE { $xf{m9 8 nSplitter = nCount; ,@Izx } 6M`N| % } Q+\?gU] D,rs) &LS&O /* C%csQ m **Utility.java -a[]#v9 */ v*7lJNN. package NetFox; ?Q)z5i'g# eY1$smh t HwH Wi public class Utility { 5/O;&[l Yy ?X.MKNbp bvMa|;f1 public Utility() 3:h9cO/9 { -B-nTS` cR1dGNcp/@ yw%5W=< } f:h.O# d> tzhkdG //线程睡眠 TKsze]/q public static void sleep(int nSecond) Uaho.(_GP { ='0f#>0Q try{ #~r+ Thread.sleep(nSecond); jyt#C7mj-A } )k8=< =s catch(Exception e) lnFOD+y9 { ~\%MJ3 e.printStackTrace (); #w4=kWJ[ } q1Si*?2W } s}d1 k S3=M k~_& //日志 .f V-puE public static void log(String sMsg) I"]5B { b&;1b<BwD System.err.println(sMsg); XK
(y ?Y1 } l0 H,TT~2 3 G?^/nB pH%cbBm public static void log(int sMsg) Ab<4F7 { -k
p~pe*T System.err.println(sMsg); ,))UQ7N } [UVxtM J } $C UmRi{T ,Z;z}{.hq nz|;6?LCLY /* '|b { **TestMethod.java q9RCXo>Y+1 */ d]OoJK9&& package NetFox; bc"E=z }TZ5/zn.Dw B8^tIq
public class TestMethod { 3:i4DBp,i bUC-} fn zj@_{| public TestMethod() @xJ qG" { ///xx/weblogic60b2_win.exe j w)Lofn try{ ~a[]4\m; SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); oQC* d}_E} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); R$&|*0
SiteFileFetch fileFetch = new SiteFileFetch(bean); {R7>-Y[4)2 fileFetch.start(); nu] k<^I5| } ={?} [E catch(Exception e){e.printStackTrace ();} O /wl";- {_1^ GIIS Z1FO.[FV } zi23k= M#J OX/ SzR0Mu3uK public static void main(String[] args) [IVT0
i { w|x=^ new TestMethod(); H(ht{.sjI } )EYsqj } %Yg;s'F>#q 点击下载更多相关资料
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