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/* 8w L%(p **SiteFileFetch.java y-k]Tr */ mYw9lM package NetFox; Z!SFJ{ import java.io.*; H*V Z&{\7 import java.net.*; ?*: mR|= e'L$g-;>4b " UxKG+ public class SiteFileFetch extends Thread { PR;A 0
wh)Ujgd NI33lp$V SiteInfoBean siteInfoBean = null; //文件信息Bean d|RDx;rl8 long[] nStartPos; //开始位置 ,BuEX#ZaBl long[] nEndPos; //结束位置 ebmU~6v k FileSplitterFetch[] fileSplitterFetch; //子线程对象 SED_^ long nFileLength; //文件长度 {*Tnl-m~ boolean bFirst = true; //是否第一次取文件 L"ob))GF boolean bStop = false; //停止标志 ra>jVE0` File tmpFile; //文件下载的临时信息 Y.}8lh
eH DataOutputStream output; //输出到文件的输出流 8zWKKcf7t LG>lj$hO //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _tO:,%dL public SiteFileFetch(SiteInfoBean bean) throws IOException ("5Eed { 4M{]YZMw8 siteInfoBean = bean; 5Ff1x-lQ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6O#
xV:Uc< tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); >+E
if(tmpFile.exists ()) \o2cztl= { =BNS3W6 bFirst = false; [|E|(@J read_nPos(); BkcA_a:W } vivU4:uH3 else 7PG|e# { ,)](h+zl_6 nStartPos = new long[bean.getNSplitter()];
MTUJsH\ nEndPos = new long[bean.getNSplitter()]; V-.Nc# } f )K(la^' HMrl!;: QH.zsqf( O~=|6#c } 3I%F,-r Tyk\l>S qsTB)RdjP% public void run() Wp0L!X=0
{ &ytnoj1L( //获得文件长度 P]wCC`qi //分割文件 6y
d/3k //实例FileSplitterFetch VGtKW kVH //启动FileSplitterFetch线程 lhRo+X#G //等待子线程返回 /UAcN1K!B try{ Sx|)GTJJ|- if(bFirst) ;;;{<GEQ { /ig'p53jL nFileLength = getFileSize(); Se>"=[= if(nFileLength == -1) Z;4pI@u { }:f
\!b System.err.println("File Length is not known!"); uxsfQ%3`# } &hri4p/ else if(nFileLength == -2) 5(V'< { tP;^;nw System.err.println("File is not access!"); Fo86WP} } `PVr;& else JZM:R { { :m%n- for(int i=0;i<nStartPos.length;i++) c4AkH| { yw3E$~ k nStartPos = (long)(i*(nFileLength/nStartPos.length)); $&l}
ABn } 7UzbS,$x for(int i=0;i<nEndPos.length-1;i++) FsdxLMwk1 { G*x"drP nEndPos = nStartPos[i+1]; f#3U,n8: } Pm*N!:u nEndPos[nEndPos.length-1] = nFileLength; j4hiMI; } fZ)M
Dq } 5\6S5JyIL gPrIu+|F _Uxt9 X //启动子线程 .tny"a& fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5C^oqUZ for(int i=0;i<nStartPos.length;i++) +zz\* { o;D[F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Hve'Z,X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?h*Ngbj> nStartPos,nEndPos,i); 2kS]:4)T Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !qjIhZi fileSplitterFetch.start(); ?z]hYsy } RIDzNdM>U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1dg y-$H~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (4WAoye | // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", G?t<4MTv nEndPos = " + nFileLength); snW=9b)m // fileSplitterFetch[nPos.length-1].start(); (6*CORE
5[py{Gq uN)o|7 //等待子线程结束 !N@d51T=N //int count = 0; {d%% nK~ //是否结束while循环 JQtBt2 boolean breakWhile = false;
x=%p~$C \UF/_'=K 5/ee&sJR while(!bStop) A=z+@b6 { %FDv6peH write_nPos(); kX2bU$1Q,i Utility.sleep(500);
z!<X{&
e breakWhile = true; 0E5"}8 _8f?
H#& (zO)J`z> for(int i=0;i<nStartPos.length;i++) M!9gOAQP { 4w\@D>@}H if(!fileSplitterFetch.bDownOver) m@z.H ; { LL}|#%4d breakWhile = false; I)B+h8l72< break; <h*r } E,/<; } |\lsTY&2 if(breakWhile) gNsas:iGM break; :?*|D p1 lD%Fk3 J*n Q(*e //count++; <yw6Om:n< //if(count>4) Y2j>@ // siteStop(); 3($ cBC } * 7<{Xbsj^ -8r';zR jc4#k+sb System.err.println("文件下载结束!"); w[5uX> } #s\HiO$BT catch(Exception e){e.printStackTrace ();} e#+u8 LrN } 8,0WHivg R7q\^Yzo *CIR$sS //获得文件长度 CWTPf1?eB public long getFileSize() %z0;77[1 I { &$1ifG int nFileLength = -1; Xiy9Oeq2uh try{ ","O8'$OC URL url = new URL(siteInfoBean.getSSiteURL()); y*BS
%xTF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5Hli@:B2s httpConnection.setRequestProperty("User-Agent","NetFox"); J|uxn<E<> $j+RUelFY 4P406,T]r int responseCode=httpConnection.getResponseCode(); H'Oy._,]t if(responseCode>=400) wb#ZRmx} { %`M IGi# processErrorCode(responseCode); <Z nVWER return -2; //-2 represent access is error Skbd'j } \4/zvlo]h B"@3Q av3 .qN|.:6a String sHeader; ho'Ihep,L Qb.Ve7c y:m
;_U,%c for(int i=1;;i++) ^5MPK@)c,/ { ;*H@E(g //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /S9(rI<' //Utility.log(in.readLine()); WRBCNra sHeader=httpConnection.getHeaderFieldKey(i); dHzQAqb8J if(sHeader!=null) ?g6xy[ { }MCh$ if(sHeader.equals("Content-Length")) -/ltnx)j { ef Moi 'v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); '4"9f]: break; '{[n,xeR } ,:E*Mw: } A"V($:>U else XK";-7TZt break; L&I8lG } g5YDRL!Wh } t1Zcr#b> catch(IOException e){e.printStackTrace ();} _x2i=SFo*$ catch(Exception e){e.printStackTrace ();} -J06H&/k SqF `xw 6XFLWN-) Utility.log(nFileLength); H,{WrWA !jySID?q @{X<|,W9w return nFileLength; mr6 ~8I } +D@+j &c|3v! pz hPEp; //保存下载信息(文件指针位置) NKSK+ll2 private void write_nPos() qDVt { OxC8xB;` try{ 1Mtm?3Pt output = new DataOutputStream(new FileOutputStream(tmpFile)); q;)+O#CR output.writeInt(nStartPos.length); 4ZX6=-u^ for(int i=0;i<nStartPos.length;i++) QMz6syn4u { t|5T,YFG // output.writeLong(nPos); Fcz}Gs4 output.writeLong(fileSplitterFetch.nStartPos); ^E#i5d+'N output.writeLong(fileSplitterFetch.nEndPos); nj(\+l5 } auai@)v6 output.close(); 9*<=K } ,bGYixIfYZ catch(IOException e){e.printStackTrace ();} SJJ[y"GvD catch(Exception e){e.printStackTrace ();} O u-/dE% } HPus/#j'+ l(<=JUO; zgnZ72% //读取保存的下载信息(文件指针位置) E5+-N private void read_nPos() _X6@.sM/2 { MV?#g-5 try{ _-R&A@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ? koIZ int nCount = input.readInt(); Tp[-,3L nStartPos = new long[nCount]; O!U8"Yr$ nEndPos = new long[nCount]; _pN:p7l( for(int i=0;i<nStartPos.length;i++) N fBH { $[xS>iuD nStartPos = input.readLong(); ^Mm sja5K nEndPos = input.readLong(); ]=28s
*@ } !K %8tr4 input.close(); O}3|UI!` } 8JFvz(SK> catch(IOException e){e.printStackTrace ();} _wp_y-" catch(Exception e){e.printStackTrace ();} k
E},>+W+ } lvd`_+P$ /Pyj|!C3`q M?ObK#l!_ private void processErrorCode(int nErrorCode) r?$V;Z { [q!/YL3% System.err.println("Error Code : " + nErrorCode); W'Y?X]xr } L']"I^(N {bP
)Fon nXT/zfS //停止文件下载 fWz=bJ"V public void siteStop() WXs?2S* { o6/"IIso3 bStop = true; A:4?Jd> for(int i=0;i<nStartPos.length;i++) |r+w(TG fileSplitterFetch.splitterStop(); rX}FhBl5 V)Sw\tS6g $e, N5/O } 5kik+ } =1+/`w //负责部分文件的抓取 +:kMYL3 **FileSplitterFetch.java qO RL
7?{ */ zhgvqg- package NetFox; AaLbJYuKd QJF_ " :ggXVwpe import java.io.*; 5q;c=oRUj import java.net.*; .x'?&7#( hYbaVE .G-L/*&% public class FileSplitterFetch extends Thread { EYRg,U&' ?3y>K!D(A gx.\&W b String sURL; //File URL Vtv~jJ{m long nStartPos; //File Snippet Start Position qH4+iSTnV long nEndPos; //File Snippet End Position ^6QzaC3 int nThreadID; //Thread's ID U'LPaf$O boolean bDownOver = false; //Downing is over vcC" boolean bStop = false; //Stop identical ~5o2jTNy`p FileAccessI fileAccessI = null; //File Access interface tTbfyI 1 T}jK^" .#}A/V.-Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @:}l a { *RmD%[f this.sURL = sURL; R0urt this.nStartPos = nStart; #x6EZnG this.nEndPos = nEnd; uN=f(-" nThreadID = id; `Y3\R# fileAccessI = new FileAccessI(sName,nStartPos);//定位 n )PqA* } *z^Au7,& (QS 0 6a704l%#hb public void run() ]sI\.a { oDWNOw while(nStartPos < nEndPos && !bStop) K7t_Q8 { (6i4N2 deEc;IAo uFuP%f!yY try{ PPde!}T$ URL url = new URL(sURL); LK<ZF=z]Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :<v@xOzxx httpConnection.setRequestProperty("User-Agent","NetFox"); a@-bw4SD String sProperty = "bytes="+nStartPos+"-"; M eYu httpConnection.setRequestProperty("RANGE",sProperty); IP^1ca#< Utility.log(sProperty); P('bnDU `7oYXk Mp(;PbVD InputStream input = httpConnection.getInputStream(); p^w_-(p //logResponseHead(httpConnection); b#*"eZj S0ReT*I s^k<r;'\ byte[] b = new byte[1024]; U,lO{J[T int nRead; _p?s[r* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) PbfgWGr { 2Z ?l,M~ nStartPos += fileAccessI.write(b,0,nRead); -XnOj2 //if(nThreadID == 1) BY':R-~( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *J{E1])<a } sq@c?!' `/9I` <y u4'B Utility.log("Thread " + nThreadID + " is over!"); Tfx-h)oP3 bDownOver = true; Ya-GDB;L //nPos = fileAccessI.write (b,0,nRead); R,fAl"wMu } |pBvy1e4) catch(Exception e){e.printStackTrace ();} cqT%6Si } Lt
i2KY}/% } NN5G
'|i DcG=u24Xy! U;*O7K=P //打印回应的头信息 +O)ZB$w4 public void logResponseHead(HttpURLConnection con) ENI|e,'[ { IJC]Al,df for(int i=1;;i++) o6:@j#b { v^;vH$B String header=con.getHeaderFieldKey(i); &*oljGt8 if(header!=null) ],vid1E //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,c
0]r;u! Utility.log(header+" : "+con.getHeaderField(header)); c=^69>w else hLVgP&/E break; J4s`U/F } f0YBy<a } r%>EiHpCU KFy|,@NI FC public void splitterStop() +{}p(9w@ { L">m2/ HG bStop = true; uo*lW2&U } 1#8~@CQ :: >FJK$>[1:p cVYu(ssC4 } WI.+9$1:P ;bL?uL 2sVDv@2 /* = )4bf"~8 **FileAccess.java !1@oZ( *//文件访问(定位,写) /<dl"PWkJv package NetFox; ymT]ow6C import java.io.*; &B++ "f c{39,oF )q/brCq public class FileAccessI implements Serializable{ 9>ZX@1]m_ YG)7+94 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :qV|rih_Q RandomAccessFile oSavedFile; XhN?E-WywQ long nPos; Ih;D-^RQ tf1Y5P$ +vPCr&40 public FileAccessI() throws IOException pW>.3pj { l1%*LyD this("",0); 5bsv05=e } p%/lP{ IVeA[qA0 g91xUG public FileAccessI(String sName,long nPos) throws IOException Nov
An+ { Fl"LK:) oSavedFile = new RandomAccessFile(sName,"rw"); C\|HN=2eh this.nPos = nPos; nE:Wl oSavedFile.seek(nPos); 52F3r:Rk } M?kXzb\O 'lgS)m RhE|0N= public synchronized int write(byte[] b,int nStart,int nLen) tMo=q7ig { XHY,;4 int n = -1; eO{2rV45O try{ rKl oSavedFile.write(b,nStart,nLen); q\~D:z$+CO n = nLen; gV'=uz v } ;:bnLSPo catch(IOException e) 0_t9;;y : { t,kai6UM e.printStackTrace (); s##XC^;p[ } j3>&Su>H4 `|:` yl P+ 0-h return n; =CaSd| } Cn>t"#zs!~ jLEO-<)-) X"T)X#:) } kQrby\F(< @X_)%Y-^O ;|oem\dKv /* l585L3i **SiteInfoBean.java CR-2>,*a9 */ qc6d,z/ package NetFox; qi8~bQ{rH Pa ^_s a3:1`c/~\ public class SiteInfoBean { ^K^rl9 SqoO"(1x `QT9W-0e^ private String sSiteURL; //Site's URL YRj"]=
5N private String sFilePath; //Saved File's Path L0ZAF2O private String sFileName; //Saved File's Name
_,*QJ private int nSplitter; //Count of Splited Downloading File U#4>GO;A ul\FZT 4 IpVtbDW public SiteInfoBean() '8|joj>G= {//nSplitter的缺省值为5 '^.3}N{Fo //default value of nSplitter is 5 RNX>I,2sh this("","","",5); ~Ecx>f4nX } <{.pYrn !:1BuiL &"X1w $ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7nbaR~ZV { N\x<'P4q sSiteURL= sURL; OC`Mzf%. sFilePath = sPath; ,^qHl+' sFileName = sName; @Sz7*p this.nSplitter = nSpiltter; * YTv" 7*47mJyc v0+$d\mP4< } 2%j"E{J& m>'#664q1 kT&GsR/ public String getSSiteURL() .c _qMTm" { MNKY J return sSiteURL; a.SxMF } !A"-9OS2 4zf( =M34
HPG public void setSSiteURL(String value) [3(lk_t { ]U5/!e sSiteURL = value; e:= +~F(f } E^V4O l< 6Xt c3 ] U[4r9V public String getSFilePath() +K"d\<
{ ngH_p> return sFilePath; t8"yAYj
} 6?3\P>`3Y fMRMQR=6B w0fFm"A|W public void setSFilePath(String value) stlkt>9 { /??nOVvt sFilePath = value; CrEC@5j } UQ+!P<>w
etH]-S (hIy31Pf public String getSFileName() k!sk\~>YO { -<aN$O return sFileName; .T^e8 } + Scw;gO %x|0<@b7- i^&^eg'.5 public void setSFileName(String value) J, vEZT<Mt { +:m' sFileName = value; !"N-To-c } _.3O(? p, Y+_t50S PkxhR;4 public int getNSplitter() vrvOPLiQ { M\dZxhQ-l return nSplitter; x8E!Ko]( } Fs;_z9ej-u hZLwg7X! p*"H&xA@ public void setNSplitter(int nCount) `'M}.q,k~ { eEMU,zCl nSplitter = nCount; Kv-4VWh } *9xv0hRQ%? } ayoqitXD? m8<l2O=m h;2n2.Q /* ld/\`s[i **Utility.java $&[}+?? */ UBvea(z-# package NetFox; ;]xJC
j #&ZwQw V.Ki$0> public class Utility { E]j2%}6Z% ]-G10p}Ph- V50FX}i public Utility() i$!-mYi+Q! { *T{P^q.s~[ BX=YS) U<H<
!NV } %>Y86>mVz j^'op|l //线程睡眠 ;OynkZs) public static void sleep(int nSecond) V[T`I a\ { QvN=<V try{ pv #uLo Thread.sleep(nSecond); O4i5fVy{ } 7Ta",S@m catch(Exception e) 1rmK#ld"=Z { L+o"<LV] e.printStackTrace (); k9pOY]_Y } '8b/TL } DHlCus=ic 7$&3(#!N //日志 OPsg3pW!] public static void log(String sMsg) ` kG}NJf { b;XUv4~V System.err.println(sMsg); 8V$ :th(' } aOH$}QnS Y}pCBw ZfYva(zP{Q public static void log(int sMsg) "Wz#<! .r { ]d|:&h System.err.println(sMsg); H=j&uv8 } - s,M+Q(< } sw'?&:<"Ow tgP x!5U gI SP . /* 6.!Cm$l **TestMethod.java =
UT^5cl( */ l"#}g%E package NetFox; feH|sz`e 30fsVwE2 l12_&o"C~ public class TestMethod { y,D4b6 D/
SM/
e)WpqaI public TestMethod() Q8kdX6NMd& { ///xx/weblogic60b2_win.exe ?{OB+f}Mo try{ c3>#.NP_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VQQtxHTC3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 61W
ms@D% SiteFileFetch fileFetch = new SiteFileFetch(bean); =&J7
'nDP fileFetch.start(); ]}~[2k. } _'yN4>=6u catch(Exception e){e.printStackTrace ();} q-g3! LXIQpD,M 7eh<>X!TX } *P#okwp #Tjv(O[& Nl3@i`; public static void main(String[] args) B4yC"55 { i9qn_/<c new TestMethod(); wIv_Z^%V } u7oHqo` } l.#iMi(@p~ 点击下载更多相关资料
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