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/* :h0!giqoQ **SiteFileFetch.java 93.L887
*/ 6il+hz2&lH package NetFox; #LYx;[D6 import java.io.*; i&}LuF8 import java.net.*; g1UQ6Oa wxG*mOw ~ayU\4B public class SiteFileFetch extends Thread { N9H qFp z.t,qi$;{U ~a>3,v- SiteInfoBean siteInfoBean = null; //文件信息Bean Ac>GF long[] nStartPos; //开始位置 +b dnTV6 long[] nEndPos; //结束位置 #KL W&A FileSplitterFetch[] fileSplitterFetch; //子线程对象 qm=9!jqC; long nFileLength; //文件长度 )qWO}]F boolean bFirst = true; //是否第一次取文件 p:!FB8 boolean bStop = false; //停止标志 CS xB)- File tmpFile; //文件下载的临时信息 MA mjoH DataOutputStream output; //输出到文件的输出流 V2 }.X+u&< SwH #=hg //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H[/^&1P public SiteFileFetch(SiteInfoBean bean) throws IOException 2ZxZ2?.uJ { =*WfS^O siteInfoBean = bean; 8?o{{ay //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); i,y{*xBT tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); :y!{=[>M( if(tmpFile.exists ()) yAJrdY" { %)r1?H} #% bFirst = false; y$|OE%S read_nPos(); y= 1(o3( } ,ce$y4%( else 7ws[Rp8 { ;p(Doy)i nStartPos = new long[bean.getNSplitter()]; BLo=@C%w5 nEndPos = new long[bean.getNSplitter()]; "L)?dlb6T } W$R@Klz {f>e~o
]"vpCL j+3=&PkA.] } )5U7w [4}U*\/>C *_uGzGB&G public void run() `$VnB { #fF';Y7 //获得文件长度 ,5|@vW2@u //分割文件 8rjiW# //实例FileSplitterFetch gM
v0[~;u //启动FileSplitterFetch线程 ^+dL7g?+ //等待子线程返回 eG5xJA^ try{ KlRIJOS if(bFirst) eKqo6P:#f { f:A1j\A? nFileLength = getFileSize(); 5bprhq-7 if(nFileLength == -1) _ Av_jw`m { 4p(\2?B%f System.err.println("File Length is not known!"); u,Cf4H*xS } yLvU@V@~ else if(nFileLength == -2) Z1+1>|-iW { s !HOrhV System.err.println("File is not access!"); L q;=UE } kAk+Sq^n else cfW;gFf { ^pvnUODW[ for(int i=0;i<nStartPos.length;i++) ^{+_PWn { <~.1>CI9D3 nStartPos = (long)(i*(nFileLength/nStartPos.length)); k Rp$[^ma } }$'T=ay& for(int i=0;i<nEndPos.length-1;i++) h\OMWJ~ { .u9,w nEndPos = nStartPos[i+1]; 0qo:M3 } !JwR[X\f nEndPos[nEndPos.length-1] = nFileLength; ~jOk?^6 } HS
1zA } +@yTcz ~0gHh e:WKb9nT //启动子线程 @avG*Mr^ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; n]WVT@ for(int i=0;i<nStartPos.length;i++) vF$sVu|B { E$E#c8I: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~fF;GtP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), iXuSFman nStartPos,nEndPos,i); H}}C>p"!, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 'WJ3q|o/
fileSplitterFetch.start(); IdWFG?b3 } 0\yA6`}! // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +Rd;>s*.Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); -f8iq[F5 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a.s5>:Ct nEndPos = " + nFileLength); g,5Tr_ // fileSplitterFetch[nPos.length-1].start(); ;Z{jol sb*)K,U ABnJ{$=n# //等待子线程结束 %pImCpMR //int count = 0; 6n$g73u<=3 //是否结束while循环 Z {*<Gx boolean breakWhile = false; @L5s.]vg= V82N8-l F]KAnEf while(!bStop) xU;;@9X { IpI|G!Y, write_nPos(); 7,EdJ[CR$ Utility.sleep(500); Ya-kMUW breakWhile = true; I=9sTR) w|8T6W|w jB%aHUF; for(int i=0;i<nStartPos.length;i++) -1tiy.^$F { xr1,D5 if(!fileSplitterFetch.bDownOver) TKZ[H$Z { W(,3j{d2i breakWhile = false; 'P3jUc) break; EHX/XM } F>s5<pKAX } #hF(`oX}4K if(breakWhile) oD&axNk break; <]h?_) &O.lIj#FR k^*S3#" //count++; 3/0E9' //if(count>4) (od9adSehV // siteStop(); *t,1(Gw|7q } )V?:qCuY> N)^`
15w {E$smX System.err.println("文件下载结束!"); 6k*,Yei } R*r;`x catch(Exception e){e.printStackTrace ();} @pO2A6Ks } 4|Ay;}X \ #8qhl .FpeVjR'' //获得文件长度 ?I332,,q public long getFileSize() "TP^:Ln { GEUC<bL+ int nFileLength = -1; S<UWv@`U" try{ 0;2"X[e URL url = new URL(siteInfoBean.getSSiteURL()); @PAT|6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2*ByVK httpConnection.setRequestProperty("User-Agent","NetFox"); HGlQZwf ~l"]J'jF"H h0)Dj(C int responseCode=httpConnection.getResponseCode(); k}FmdaPI' if(responseCode>=400) I::|d,bR! { |!E: [UH processErrorCode(responseCode); JBt2R= return -2; //-2 represent access is error $bsD'Io } S>V+IKW;( QSSA) T?HW=v_a String sHeader; }YCpd )@ 0<#>LWaM_ =C 7 WQ for(int i=1;;i++) LeaJ).Maw { FDCc?>,o //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4Be'w`Q { //Utility.log(in.readLine()); `R6dnbH sHeader=httpConnection.getHeaderFieldKey(i); _ UGR+0'Q\ if(sHeader!=null) z~(3S8$ { H?_>wQj& if(sHeader.equals("Content-Length")) sFV&e->AN\ { 6&`hf > nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h1 pEC break; 5L\&"[' } dpSNh1 } =bJ7!& else zy(NJ break; x7ZaI{ } B"?ivxM:U } #.j}: catch(IOException e){e.printStackTrace ();} T: I34E[ catch(Exception e){e.printStackTrace ();} 7]H<ou .W
s\%S w;;9YFBdM Utility.log(nFileLength); ,=V9? <NXJ&xs-+ XR|U6bf] return nFileLength; Gy)2 } D$Eq~VQ yc+pNC)ue_ !
G3Gr //保存下载信息(文件指针位置) AW8*bq1 private void write_nPos() B;e (5y- { 03H0(ku= try{ y4)iL?!J~ output = new DataOutputStream(new FileOutputStream(tmpFile)); M>[e1y>7 output.writeInt(nStartPos.length); z"P/Geb:O for(int i=0;i<nStartPos.length;i++) `3yK<- { Z@,[a // output.writeLong(nPos); oju,2kpH7# output.writeLong(fileSplitterFetch.nStartPos); %y_{?|+ output.writeLong(fileSplitterFetch.nEndPos); TyhO+; } GRh430V[ output.close(); |p.|zH } H)+QkQb} catch(IOException e){e.printStackTrace ();} w)C5XX30; catch(Exception e){e.printStackTrace ();} S#:l17e3 } uH]oHh!}j v=d16 CorV!H4
//读取保存的下载信息(文件指针位置) F:N8{puq5 private void read_nPos() vb6kr?-i* { i&YWutG try{ stQ_Ke DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); C),i#v int nCount = input.readInt(); :g ~_ nStartPos = new long[nCount]; R*/s#*gmL nEndPos = new long[nCount]; F3[,6%4v for(int i=0;i<nStartPos.length;i++) Q[{RNab { 5]xSK'6W nStartPos = input.readLong(); niqknqW<t nEndPos = input.readLong(); $*;`$5.x^ } p(6 sN= input.close(); P ; h8 } ?N^1v&Q catch(IOException e){e.printStackTrace ();} ?4^ 0xGyE catch(Exception e){e.printStackTrace ();} +z4E:v } &`oybm-p( TV=K3F5)M 1mD)G55Ep private void processErrorCode(int nErrorCode) dci<Rz`h { 5th?m> System.err.println("Error Code : " + nErrorCode); ,x$^^ } 7=%Oev&0g- kH8/8 dIfy!B" //停止文件下载 Y_K W9T_ public void siteStop() NSM7n=
*nh { Ol~M
BQs bStop = true; l dqU#{ for(int i=0;i<nStartPos.length;i++) pH3<QNq5 fileSplitterFetch.splitterStop(); PMUW<UI Z&O6<=bg! tzthc*-< } jD${ZIv } SA7(EJ95 //负责部分文件的抓取 `/^
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**FileSplitterFetch.java M*f]d`B */ P?S]Q19Q4 package NetFox; s VHk;:e>x sn"z'=ch xv&h>GOg import java.io.*; hD=.rDvO import java.net.*; |c^ ?tR< <v'&Pk< )U=]HpuzI public class FileSplitterFetch extends Thread { C!|LGzs0 z;!"i~fFK rtfRA< String sURL; //File URL 2,wwI<=E' long nStartPos; //File Snippet Start Position N<1+aL\ long nEndPos; //File Snippet End Position BM'!odRv int nThreadID; //Thread's ID 2?SbkU/3|P boolean bDownOver = false; //Downing is over 'NZ=DSGIy boolean bStop = false; //Stop identical kRc+OsY9 FileAccessI fileAccessI = null; //File Access interface xx(C$wCJ R<U]"4CBx $dF3@(p public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G:p85k` { 5dB62dqN this.sURL = sURL; P#7=h:.522 this.nStartPos = nStart; *mVg_Kl this.nEndPos = nEnd;
lPI~5N8 nThreadID = id; s M*ay,v; fileAccessI = new FileAccessI(sName,nStartPos);//定位 #=={h?UDT } 9v[V"m`M P:t .Nr" a eeor public void run() .p, VZ9 { 6y~F'/ww while(nStartPos < nEndPos && !bStop) Rq%Kw> {& { Q2D!Agq=D N-]/MB8 W"^ =RY try{ 5|nc^
12 URL url = new URL(sURL); <l$ d>, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); X.#)CB0c1Q httpConnection.setRequestProperty("User-Agent","NetFox"); P6R_W String sProperty = "bytes="+nStartPos+"-"; t:5-Ro httpConnection.setRequestProperty("RANGE",sProperty); #,u|*O: Utility.log(sProperty); z V\+za, t2s/zxt wV"`Du7E; InputStream input = httpConnection.getInputStream(); "J`&"_CyZ //logResponseHead(httpConnection); +l/v`=C CF2Bd:mfZ :Ys~Lt54 byte[] b = new byte[1024]; S.)Jp-&K int nRead; l6&\~Z( while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) avL_>7q { r]UF<*$ nStartPos += fileAccessI.write(b,0,nRead); V@!)Pw //if(nThreadID == 1) \1Xk[% // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); BUJ\[/ } qfyZda0d |7tD&9< =I'3C']Z W Utility.log("Thread " + nThreadID + " is over!"); #F.jf2h@ bDownOver = true; ;,C]WZ.w //nPos = fileAccessI.write (b,0,nRead); R2gV(L(!! } PmRvjSIG catch(Exception e){e.printStackTrace ();} M[gL7-%w\ } yGf7k>K' } ]mb8R:a1 U8w_C\Q E5d$n*A //打印回应的头信息 Z0jgUq`r public void logResponseHead(HttpURLConnection con) /}(d'@8p { :Ko6.| for(int i=1;;i++) ~vF a\7sf { (
%\7dxiK String header=con.getHeaderFieldKey(i); $+!dP{ if(header!=null) ba);f[> //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2t-w0~O Utility.log(header+" : "+con.getHeaderField(header)); ^,acU\}VqP else NEIkG>\7q break; >F7w]XH } B6Vlc{c5SO } e~9O#rQI BVNW1<_: V@G#U[D public void splitterStop() N8b\OTk2 { fI613ww] bStop = true; K Lg1(W( } 3}0\W.jH 6'r8.~O DPTk5o[ } .$%p0Yx+ t'vt'[~,U 0jf6 z-4 /* \ ;npdFy **FileAccess.java ,vJt!}} *//文件访问(定位,写) HYmC3 package NetFox; l%0bF9\ import java.io.*; " B#|C' QO/0VB42 6lSz/V; public class FileAccessI implements Serializable{ uZS : NQk aW) //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 GiV%Hcx RandomAccessFile oSavedFile; zTF{ g+ long nPos; O?JJE8~'] NXU:b"G
S V&M*,#(? public FileAccessI() throws IOException 3'0Pl8 { _rT\?//B this("",0); CubQ6@, } ]:<!( G<;~nAo?f0 ;sZG=y@ public FileAccessI(String sName,long nPos) throws IOException s[yWBew { Cbw *?9d oSavedFile = new RandomAccessFile(sName,"rw"); &AQqI this.nPos = nPos; fu/8r%:h oSavedFile.seek(nPos); hmO2s/~ } _M&TT]a =
xO03|T;6 n/+X3JJ public synchronized int write(byte[] b,int nStart,int nLen) /BL:"t@- { nT6y6F_e int n = -1; ,,'jyqD try{ H}^ ' oSavedFile.write(b,nStart,nLen); +I3jI < n = nLen; UN]gn>~j } SS=<\q#MS catch(IOException e) >cu%C s=m { KP&+fDa e.printStackTrace (); { mi}3/ } SB_Tzp {PHH1dC{ "|SMRc return n; 2/LSB8n| } k~Ex_2;# 'cW^ S7 H U|.5tP } -@W9+Zf5 ,fkvvM{mq >
;,S|| /* -/yqiC-yx **SiteInfoBean.java Da=EAG-{7 */ > H!sD\b package NetFox; )ZG;.j
3o<d=@`r )dXa:h0RZ public class SiteInfoBean { _bFUr M";qo6 p4'
.1.@ private String sSiteURL; //Site's URL +)Z]<O private String sFilePath; //Saved File's Path IC`3%^ private String sFileName; //Saved File's Name ')X(P> private int nSplitter; //Count of Splited Downloading File DXFu9RE\{ 51#*8u+L $
V^gFes public SiteInfoBean() p@m0Oi,= {//nSplitter的缺省值为5 z:Ml;y //default value of nSplitter is 5 bz4Gzp'6k this("","","",5); Hq3|>OqC2Q } K$CC ~,D _5oTNL2 F^i3e31*t public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Wv;0PhF { sZ.<:mu[ sSiteURL= sURL; (m~>W"x/ sFilePath = sPath; =
tv70d' sFileName = sName; 4"d,=P.{ this.nSplitter = nSpiltter; 7=G2sOC M&Uy42,MR /x<g$!`X } mxa~JAlN_ ]-=L7a |.<_$[v[x public String getSSiteURL() p~pD`'% { ]g_VPx" return sSiteURL; mzgt>Qtkz= } *Rgr4-eS H|9t5
aO6\e> public void setSSiteURL(String value) &qv~)ZM$ { Y0LZbT3 sSiteURL = value; IkrB} } Y-VDi.]W ]z'&oz =~D? K9o public String getSFilePath() iSW2I~PD { L4By5) return sFilePath; o3J#hQrl } H;Wrcf2 O[@!1SKT0 xQoZ[ public void setSFilePath(String value) mw@Pl\= { +C(-f sFilePath = value; H4$qM_N } 'o AmA= ]33!obM TOwd+]B public String getSFileName() &?<uR)tl { X Xque- return sFileName; dkQ4D2W*\ } (jc@8@Wo. <2$vo y Zafq"o public void setSFileName(String value) &Mh.PzO=b { SSK}'LQ sFileName = value; ?=u?u
k<- } )M0YX?5AR r`H}f#.KR #M,&g{ public int getNSplitter() gf|uZ9{ { u'YXI="( return nSplitter; |z-f8$ } Y:^hd809 Hon2;-:]{] -Q
WvB public void setNSplitter(int nCount) !09)WtsEfx { E^F"$Z"N nSplitter = nCount; DfXkLOGik } tOwn M1
:( } !_QI<=X f|[7LIdh- (gt\R} /* g4K+AK **Utility.java 'aSsyD!?< */ [xS7ae package NetFox; s~M4. 06P +^.Yt0} umYsO.8 public class Utility { ]so/AdT9hA TxrW69FV7 |9*Rnm_ public Utility() rQ*+
<`R} { c%&,(NJ]K m#"_x{oa v%tjZ5x } <Q[%:LD 3Y#Q'r? //线程睡眠 `3TR`,= public static void sleep(int nSecond) &l(T},-X { 7)?C+=,0 try{ H2X_WSwm Thread.sleep(nSecond); @0 +\:F } P1#g{f catch(Exception e) 5Xq+lLW> { 2/-m-5A e.printStackTrace (); ($di]lbsT } corm'AJ/ } |J$A%27 xUJ(tG3 //日志 (zhZ}C,VF public static void log(String sMsg) vNO&0~ { B'Yx/c&n System.err.println(sMsg); 0s n$QmW: } NdK`-RT (,At5T w,%"+tY_ public static void log(int sMsg) *5'8jC"2g { YPK@BmAdE System.err.println(sMsg); rZK h}E } -l[H]BAMXy } K,4Ig! z#{Y>.b FZ*"^=)`G /* I4Do$&9<D **TestMethod.java l\_!oa~ */ ?1Nz
,Lc$ package NetFox; B`SX3,3 <spG]Xa< x[A|@\Z public class TestMethod { 757&bH|a l)r\SE1 y-pdAkDh public TestMethod() :zW? O#aL- { ///xx/weblogic60b2_win.exe Z$z-Hx@% try{ {_7hX`p SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); @ &jR^`Y. //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \kE0h\ SiteFileFetch fileFetch = new SiteFileFetch(bean); 1P)K@j fileFetch.start(); pH~\~ } %1&X+s3 catch(Exception e){e.printStackTrace ();} G^'We6< g;l K34{ kNuvJ/St } ^-%'ItVO 8vx
ca]DcV "6,fIsU public static void main(String[] args) Tzd#!Lvm:, { ~-"CU:$o new TestMethod(); h;=~%2Y } F:zmO5L5 } ?e%*q^~Cu 点击下载更多相关资料
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