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/* Pf<yLT] **SiteFileFetch.java }}ic{931 */ !s?SI=B8 package NetFox; bM5o-U#^ C import java.io.*; (xoYYO import java.net.*; uubIL+
17,mqXX> +GL$[ 5G public class SiteFileFetch extends Thread { SWY RgL>0s +
d 3 SiteInfoBean siteInfoBean = null; //文件信息Bean pT3icy!A= long[] nStartPos; //开始位置 $45.*>, long[] nEndPos; //结束位置 V0#Ocq, FileSplitterFetch[] fileSplitterFetch; //子线程对象 (>f`>6 V long nFileLength; //文件长度 eG8l^[ boolean bFirst = true; //是否第一次取文件 U djYRfk boolean bStop = false; //停止标志 ("r:L<xe& File tmpFile; //文件下载的临时信息 Ir5|H|b< DataOutputStream output; //输出到文件的输出流 Jj\lF*B awvP;F?q| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @6UZC-M0 public SiteFileFetch(SiteInfoBean bean) throws IOException \v5;t9uBZ { 6>)nkD32g siteInfoBean = bean; D6l.x]K //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9jX_Eoxy tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); >KvK'Mus/ if(tmpFile.exists ()) ^Y+Lf]zz* { GN9kCyPK bFirst = false; a@<-L read_nPos(); %+Y wzL{ } ?@;)2B|q else Z<^!N) { ,W|-?b? nStartPos = new long[bean.getNSplitter()]; 02trjp.f nEndPos = new long[bean.getNSplitter()]; B>m*!n:l } 9xhc:@B1J V>,=%r4f T_=WX_h $ )7.DF|A } &e;Qabwxva c-}[v<o % @+j@i`& public void run() QIevps* { 'L-DMNxBr //获得文件长度 M@<9/xPS //分割文件 f,Dic%$q //实例FileSplitterFetch X(X[v] //启动FileSplitterFetch线程 ,Kl?-W@ //等待子线程返回 X-kOp9/. try{ qIQRl1Tw;V if(bFirst) h~](9 es { Rz|@BxB>n nFileLength = getFileSize(); gGUKB2) if(nFileLength == -1) u:2Ll[ eo { ~6@`;s`[Y System.err.println("File Length is not known!"); 3\Q 9>> } /e?0Iv"
8> else if(nFileLength == -2) dt,Z^z+"E { d[J_iD{ & System.err.println("File is not access!"); ^r(My} } D9A%8[Yo else jVQ89vf
~ { RR
^7/- for(int i=0;i<nStartPos.length;i++) r{9fm, { X!^|Tass nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9J?s:"j } -~lq <M for(int i=0;i<nEndPos.length-1;i++) xk%
62W { 25-h5$s nEndPos = nStartPos[i+1]; megTp } AH5;6Q nEndPos[nEndPos.length-1] = nFileLength; htR.p7&Tn } p/VVb% } u;-fG9xs xlu4 n+hL/aQ+ //启动子线程 \|HNFx T` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .6azUD4 for(int i=0;i<nStartPos.length;i++) <?5|(Q"@: { C-;w}
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uW[[8+t| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Cp"7R&s nStartPos,nEndPos,i); ->{-yh]jv Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #0[^jJ3J fileSplitterFetch.start(); E'DHO2
Y } |?2fq&2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7g(Z@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (BeJ,K7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6`@J=Q? nEndPos = " + nFileLength); #o4tG // fileSplitterFetch[nPos.length-1].start(); -dBWpT ]kTxVe 3dj|jw5 //等待子线程结束 v/c]=/ //int count = 0; 3U+FXK#6 //是否结束while循环 VDbbA\ boolean breakWhile = false; v#/Gxk9eX @|c]) QR'# ]k;>% while(!bStop) w"s@q$}]8M { FZj>N( write_nPos(); k-=LD Utility.sleep(500); aW&)3C2-x breakWhile = true; II}M|qHaK iP"sw0V8 .E}lAd.Mn for(int i=0;i<nStartPos.length;i++) I"vkfi#= { X]D,kKasG if(!fileSplitterFetch.bDownOver) DI{*E { ; s/<wx-C breakWhile = false; 4$pV;xV break; +)"Rv%. } U\tx{CsSz } l9&k!kF` if(breakWhile) qrlC
U4 break; 9DNp tj[E!
&~H ed_ //count++; znwKwc8, //if(count>4) Nb`qM]& // siteStop(); -m%`Di!E } `z0q:ME /GC&@y0yi F9u?+y-xb System.err.println("文件下载结束!"); 5MAfuHq^ } ^F+7<$2 catch(Exception e){e.printStackTrace ();} TjEXR$:< } =#S.t:HQ* JN|6+.GG 1d<Uwb> //获得文件长度 aY>v public long getFileSize() *b.
> { nJ2x;';lA int nFileLength = -1; P U/<7P* try{ 96(Mu% l URL url = new URL(siteInfoBean.getSSiteURL()); 6^[4.D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |2u=3#Jp httpConnection.setRequestProperty("User-Agent","NetFox"); ?!U[~Gq @I`^\oJ hDW!pnj1 int responseCode=httpConnection.getResponseCode(); |j`73@6 if(responseCode>=400) c
Rq2 re { VIP7j(#t_g processErrorCode(responseCode); =\WF +r]V return -2; //-2 represent access is error r@{TN6U } T"_'sSI>tF 4?'vP ' k6;bUOo String sHeader; w>&*-}XX w31Ox1>s 5FoZ$I for(int i=1;;i++) hu.o$sV3; { ZP<<cyY //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .+/d08] //Utility.log(in.readLine()); d}[cX9U/ sHeader=httpConnection.getHeaderFieldKey(i); v\Uk?V5T if(sHeader!=null) +1!iwmch> { Kf[d@L if(sHeader.equals("Content-Length")) x?+w8jSR { 'j6O2=1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mLxgvp break; "0P`=n } 20|`jxp } @i1e0;\ else &Vz$0{d5 break; 3S:Lce'f } eyCZ[SC } h^yqrDyJ catch(IOException e){e.printStackTrace ();}
J, 9NVw$ catch(Exception e){e.printStackTrace ();} ##7y|AwK GkIY2PD =1l6(pJ Utility.log(nFileLength); rG-T Dm bP&QFc ixdsz\< return nFileLength; 0Ds3wNz } L=4+rshl!_ !mmMAsd, (90/,@66l //保存下载信息(文件指针位置) _fHml private void write_nPos() b|d-vnYE { 52e>f5m.
try{ I+8n;I)]X output = new DataOutputStream(new FileOutputStream(tmpFile)); FmL]|~ output.writeInt(nStartPos.length); $v|W2k for(int i=0;i<nStartPos.length;i++) o8bd L< { ^}_Ka //k // output.writeLong(nPos); 7MKX`S output.writeLong(fileSplitterFetch.nStartPos); hzqJ! output.writeLong(fileSplitterFetch.nEndPos); 7Q}pKq]P } 4I$Y(E} output.close(); AI-*5[w#A } 2*|T)OA`m, catch(IOException e){e.printStackTrace ();} |1U_5w catch(Exception e){e.printStackTrace ();} ysW})#7X } >NRppPqL ky2 bj}"p9 FlBhCZ|^ //读取保存的下载信息(文件指针位置) FE~D:)Xj'? private void read_nPos() Z7;V}[wie { _QPqF{iI try{ )>iOj50n3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); FZr/trP~ int nCount = input.readInt(); ZSC*{dD$E nStartPos = new long[nCount]; :!%V Sem nEndPos = new long[nCount]; HZyA\FS for(int i=0;i<nStartPos.length;i++) oN7SmP_ { >
N~8#C nStartPos = input.readLong(); 35<A:jKS nEndPos = input.readLong(); r
)F;8( } h.jJAVPi input.close(); j[G`p^ul } }aZuCe_ catch(IOException e){e.printStackTrace ();} k?+ 7%A] catch(Exception e){e.printStackTrace ();} l|P"^;*zq } B*(]T|ff< p)y5[HX 53HA6:Q[ private void processErrorCode(int nErrorCode) [FO4x` { c|&3e84U System.err.println("Error Code : " + nErrorCode); 6hxZ5&;(* } a+w2cN' QNj]wm=mp Re$h6sh //停止文件下载 G;Li!H public void siteStop() (Rw<1q`, { KGz Nj% bStop = true;
L:$4o for(int i=0;i<nStartPos.length;i++) Bm$|XS3cD fileSplitterFetch.splitterStop(); l4bytI{63 DXs an 8tj]@GE } 2c `m= } SH%NYjj //负责部分文件的抓取 2}hJe+#v **FileSplitterFetch.java A3jxjQ */ Pe`(9&iT. package NetFox; D)d]o& sg2;"E@ i}-uK,^ import java.io.*; d54iZ` import java.net.*; @(t3<g =+zDE0Qs uzYB`H< public class FileSplitterFetch extends Thread { VmS_(bM |7qt/z &N~Eu-@b String sURL; //File URL Q_5l.M/9] long nStartPos; //File Snippet Start Position 82r8K|L.<y long nEndPos; //File Snippet End Position -$Oh.B`i int nThreadID; //Thread's ID 3_(_yEKx boolean bDownOver = false; //Downing is over <DF3!r boolean bStop = false; //Stop identical qE[S>/R" FileAccessI fileAccessI = null; //File Access interface 3JnpI,By l2D*b93 bJ~H public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
Y t(D { 9]4Q@% this.sURL = sURL; sPH2KwEv this.nStartPos = nStart; lSxb:$g this.nEndPos = nEnd; Br1R++] nThreadID = id; {)[o*+9 fileAccessI = new FileAccessI(sName,nStartPos);//定位 pSs*Z6c)@ } pgU[di ij"~]I ]PXM;w public void run() A;oHji#* { ci0A!wWD while(nStartPos < nEndPos && !bStop) ['d9sEv . { |Y9>kXM l i'IT,jz! hZ&KE78? try{ Pfd1[~, URL url = new URL(sURL); FuhmLm'p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); broLC5hbQU httpConnection.setRequestProperty("User-Agent","NetFox"); rB>ge]$. String sProperty = "bytes="+nStartPos+"-"; cD!,ZL httpConnection.setRequestProperty("RANGE",sProperty); &> sbsx\y Utility.log(sProperty); As:O|!F @DN/]P q+ax]=w InputStream input = httpConnection.getInputStream(); 0SQ!lr //logResponseHead(httpConnection); ~ao:9ynY YQBLbtn6( V6]6KP#D byte[] b = new byte[1024]; djd/QAfSC int nRead; )U/jD while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) VYk:c`E { J9^NHU nStartPos += fileAccessI.write(b,0,nRead); #Hw|P //if(nThreadID == 1) Cf%
qap# // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YT\`R } U3(+8}Q =[B\50] I/E 9: Utility.log("Thread " + nThreadID + " is over!"); 7^L bDownOver = true; ).~
" //nPos = fileAccessI.write (b,0,nRead); Kk3+ ]W< } 2+1ybOwb catch(Exception e){e.printStackTrace ();} V9c.(QY|f } <c+.%ka } DT-VxF6 h `4Yo-@iVP s9- qR_ //打印回应的头信息 ejN/U{)jK' public void logResponseHead(HttpURLConnection con) u`bD`kfT> { 'eM0i[E+` for(int i=1;;i++) JEUU~L; { A5<t> 6Y String header=con.getHeaderFieldKey(i); 57\ 0MQO if(header!=null) c=!>m //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9&+]YYCS- Utility.log(header+" : "+con.getHeaderField(header)); K<S3gb?0 else n`Q@<op break; K;F1'5+=D } .. `I<2 } #M-!/E SUS=sR/N fG0 ?"x@> public void splitterStop() \"lz,bT { I G1];vX bStop = true; ,\4]uZ< } N'
hT e~)[I! n 3>O|i2U } %:3XYO.w- 09kR2(nsW/ ww2mL
<B /* ztp|FUi **FileAccess.java e@D_0OZ *//文件访问(定位,写) '|8dt "C package NetFox; <jh4P!\&j import java.io.*; MN?aPpr> Al>d
21U gOF^?M11x public class FileAccessI implements Serializable{ Tzq@ic#!B +nYFLe //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 QiK>]xJ' RandomAccessFile oSavedFile; qTsy'y;Z long nPos; zdN[Uc+1Bd b:==:d:0s z.Cj%N public FileAccessI() throws IOException o'2eSm0H { PK|-2R"M this("",0); 35\ |#2qw6 } =p5DT ]#:WL)@ h}Otz " public FileAccessI(String sName,long nPos) throws IOException `/O`%6,f1! { R%UTYRLUn oSavedFile = new RandomAccessFile(sName,"rw"); 0jTReY-W this.nPos = nPos; z8\YMr6o oSavedFile.seek(nPos); q/O2E<=w*c } M2Q,&>M
:_e[xB=Yy ;aQ``B public synchronized int write(byte[] b,int nStart,int nLen) _ *f>UW*, { omE- c int n = -1; =AIts[!qd try{ v[dUUR f oSavedFile.write(b,nStart,nLen); dq93P%X24 n = nLen; ]?^V xB7L } adLL7 catch(IOException e) z33UER" { CG1MT(V7? e.printStackTrace (); }g bLWx'iG } hGtz[u#p PR8nJts W5 Xf
u0d1b return n; Q-7?'\h } }c/p;< \<{a=@_k9 aTcz5g0" } 3FBL CD3 !se1W5ke# ucN'
zq /* ;cMQ0e **SiteInfoBean.java Oeh A3$|# */ VLXA6+ package NetFox; ddQ+EY@! wJC[[_"3 I L
FWp}#% public class SiteInfoBean { lV\iYX2# 1K Vit{ JduO^Fit private String sSiteURL; //Site's URL J"aw 1 private String sFilePath; //Saved File's Path L}h_\1 private String sFileName; //Saved File's Name LG[N\%<!H private int nSplitter; //Count of Splited Downloading File .S//T/3O]Q }0'LKwIR |] 7c&` public SiteInfoBean() -1Q24jrO- {//nSplitter的缺省值为5 Xm#W}Y' //default value of nSplitter is 5 Xg dBLb this("","","",5); /4x\}qvU } Q yqOtRk +ktv:d #W~jQ5NS\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) sOhn@*X { Qs1CK;+zU sSiteURL= sURL; p:08q
B|uQ sFilePath = sPath; ?%,LZw^[ sFileName = sName; T5:Q_o] this.nSplitter = nSpiltter; lHM+<Z p/Pus;*s aC1z.?!U }
p9"dm{ UT;%I_i!' D;en!.[Z public String getSSiteURL() m.D8@[y { aE~T!h return sSiteURL; 4R'CLN
|t } Ul8HWk[6Iw 1KZigeHXI ?UsCSJ1V public void setSSiteURL(String value) z~t0l { VeQGdyhY sSiteURL = value; :E9pdx+ } /EjXyrn2 coXg]bUKo ?t'V5$k\ public String getSFilePath() Im6gWDdq@6 { v0C+DKi return sFilePath; |]G%b[ } <|r|s CnZ!b_J cN@_5 public void setSFilePath(String value) 2;gvo*k { 'KH+e#?Ar sFilePath = value; 4X^$"lM } C3'xU` =7 oJA_"xp d*8*9CpO: public String getSFileName() iq' PeVo { ?^U? ua6 return sFileName; Jl_W6gY"Z } L6h<B
:l g+B7~Z5, ]N 9N][n public void setSFileName(String value) [H*JFKpx { &g;!n&d zP sFileName = value; .jJD$FC } .57p4{ e]VW\6J& c^I^jg2v public int getNSplitter() Bz/ba * { 7(}'jZ return nSplitter; Y"lEMY } PhyIea 35l%iaj]G5 /ZyMD(_J public void setNSplitter(int nCount) Jg$<2CR& { LDQ,SS, nSplitter = nCount; V/#Ra } '8]p]#l } a,w|r#x] ;`oK5 fg LY{ /* M
P8Sd1_= **Utility.java Hs)Cf)8u */ ?z>J7 }w*= package NetFox; DKf(igw j""ZFh04 GST#b6S public class Utility { @_kF&~ x3i}IC ]EKg)E public Utility() .e7tq\k { Qs\a&Q=0H q=pRe-{ jJIP $ } N# }A9t eA7
Iv{M //线程睡眠 !dT+cZsf public static void sleep(int nSecond) P4@`C{F5m { (tYZq86` try{ Z3JUYEAS Thread.sleep(nSecond); JuSS(dJw } J$}]p catch(Exception e) m\qeYI6, Z { Gko"iO# e.printStackTrace (); MsXw
8D } nYSe0w } :.5l ) (YNNu //日志 1(@$bsgu2 public static void log(String sMsg) c:m=9>3 { f- (i% System.err.println(sMsg); %rrA]\C' } HF0G=U}i JaUzu3*= 2VRGTx public static void log(int sMsg) R%KF/1;/ { b*Y Wd3 System.err.println(sMsg); t8-P'3,Q$ } $w*L'
< } 4|K\pCw UF7h{V}) f|,Kh1{e /* RiQ]AsTtl **TestMethod.java (6$P/k8 */ 6C2~0b package NetFox; ]JkEf?;. u{DEOhtI4 estiS public class TestMethod { ~5+RK16 %rb$tKk 9nN1f@Y public TestMethod() 36{GZDGQ { ///xx/weblogic60b2_win.exe >[Vc$[62 try{ ;p+'?%Y} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~1+6gG //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); zx%WV@O9 SiteFileFetch fileFetch = new SiteFileFetch(bean); r>(,)rs(l fileFetch.start(); -Fd&rq:GB( } 0{b} 1D catch(Exception e){e.printStackTrace ();} T[$-])iK -8^qtB <-k! } 9" q-Bb hY.i`sp*/ 3q'AgiW public static void main(String[] args) d~~kJKK { e4` L8 new TestMethod(); 3A`Gx# } ZxNTuGOB: } 5;}W=x^$a 点击下载更多相关资料
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