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/* RP@U0o **SiteFileFetch.java Xkqq$A4 */ Uuxx^>"h\ package NetFox; VjI=5)+~ import java.io.*; 4YV0v,z import java.net.*; sf([8YUd
#r=Jc8J_ 6'{/Ote public class SiteFileFetch extends Thread { D*%? 0 Q9yIQ{>H[ 6`PQP;
SiteInfoBean siteInfoBean = null; //文件信息Bean `D%U5Jb long[] nStartPos; //开始位置 3`JLb]6 long[] nEndPos; //结束位置 !^yH]v FileSplitterFetch[] fileSplitterFetch; //子线程对象 <y
S|\Z| long nFileLength; //文件长度 ^n?`l ^9c$ boolean bFirst = true; //是否第一次取文件 6"h,0rR boolean bStop = false; //停止标志 diz=|g=w File tmpFile; //文件下载的临时信息 8l1s]Kqr DataOutputStream output; //输出到文件的输出流 1fK]A*{p 43VBx<" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) `!udU,|N public SiteFileFetch(SiteInfoBean bean) throws IOException @%'1Jd7-Wp { P<%}!Y siteInfoBean = bean; W\c1QY$E //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _o52#Q4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %(uYYr
6 if(tmpFile.exists ()) 3 T1,:r { V0l"tr@ bFirst = false; AMw#_8Y read_nPos(); K7 J RCLA } Q$yMU[l) else 5%_aN_1?ef { 22T\-g{ nStartPos = new long[bean.getNSplitter()]; K8=jkU nEndPos = new long[bean.getNSplitter()]; Sx0/Dm } hCOCX_ }@y(-7t oH,{'S@q Cqs+ o^q } W ZT) LYA ^Q\Hy\ 57K\sT4[ public void run() BXb=NE { :R{pV7<O //获得文件长度 kR+7JUq] //分割文件 68?>#o865 //实例FileSplitterFetch [ *~2Ts //启动FileSplitterFetch线程 45,): U5 //等待子线程返回 sTxgU !_ try{ qs%UJ0tR if(bFirst) :#VdFMC< { >T#" Im- nFileLength = getFileSize(); !X[P)/?b0+ if(nFileLength == -1) ,Y4>$:#n/ { h+ms%tNT System.err.println("File Length is not known!"); &z]x\4#, } U *:ju+)k else if(nFileLength == -2) oj(st{, { 4;bc!>
sfC System.err.println("File is not access!"); SDc8\ms } 4J1_rMfh else S\SYFXUl { lu?:1V- for(int i=0;i<nStartPos.length;i++) k%TBpG:T { s&4&\Aq}x# nStartPos = (long)(i*(nFileLength/nStartPos.length)); #`ZBA>FLaQ } 7 w<e^H? for(int i=0;i<nEndPos.length-1;i++) i5,yrPF { HU/2P` DGP nEndPos = nStartPos[i+1]; 8og8;#mnyr } q@^^jlHP nEndPos[nEndPos.length-1] = nFileLength; B'e@RhU; } 9sN#l } ;nx.:f bt};Pn{3 TILH[r&Jg //启动子线程 I
6'!b/ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; p/qu4[Mm for(int i=0;i<nStartPos.length;i++) xi<yB0MoA { Yr*!T= z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S"t\LB*'Ls siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1=h5Z3/fj nStartPos,nEndPos,i); iR!]&Oh Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c{IL"B6> fileSplitterFetch.start(); Ou4 `#7FR } %>y`VN
D // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AtUt E#K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); m5o$Dus+?' // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", o-o -'0l nEndPos = " + nFileLength); sd"eu // fileSplitterFetch[nPos.length-1].start(); `TYC]9 1bFGoLAEFl #~m8zG //等待子线程结束 |)C
# //int count = 0; e"%uOuIYX //是否结束while循环 oj[~H}> boolean breakWhile = false; =A*a9c2
N^M6*,F,J 8Vjv #pm while(!bStop) {r~=mQ { A>8~deZ9 write_nPos(); H#uN&^+H Utility.sleep(500); `fOp>S^Q4 breakWhile = true; {b' WD_{bd) C+t0Zen for(int i=0;i<nStartPos.length;i++) f62rm[ { h;#046-7 if(!fileSplitterFetch.bDownOver) 5UJ ?1"J { zBK"k]rz breakWhile = false; /1p5KVTKv break; *fs[]q'Q } L/E7xLz } tDavp:M1v if(breakWhile) 3:G$Y:#P break; ,6X__Z#rGT ?6\N&MTF mK/E1a)AG3 //count++; d'&OEGb< //if(count>4) jhPbh5E // siteStop(); 3d]~e } xC9{hXg! lU%oU&P/"S TFm[sO0RZ System.err.println("文件下载结束!"); =1k%T {> } [y}h catch(Exception e){e.printStackTrace ();} }]#z0'Aqsu } en/ h`h]h g\?v 5 /CH]'u^j //获得文件长度 a0+q^*\d\R public long getFileSize() ?A3u2- { o>nw~_ H\ int nFileLength = -1; IN@o9pUjV try{ h-|IZ}F7 URL url = new URL(siteInfoBean.getSSiteURL()); "]uPke@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .vctuy& httpConnection.setRequestProperty("User-Agent","NetFox"); G'u[0> U?d
I _VRxI4q int responseCode=httpConnection.getResponseCode(); P(FlU]q if(responseCode>=400) 5|~nX8> { |x.^rx` processErrorCode(responseCode); AE+BrN
+"2 return -2; //-2 represent access is error ul~6zBKO } =|``d- V?'p E M>|ZBEK String sHeader; n$XEazUb0N :4-,Ru1C" S-}c_zbl; for(int i=1;;i++) ,*dLE { ?hGE[.(eh] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =PQ4S2Q //Utility.log(in.readLine()); 3[y$$qXI sHeader=httpConnection.getHeaderFieldKey(i); _WvVF*Q"k if(sHeader!=null) J}[[tl { $./aKJ1B if(sHeader.equals("Content-Length")) *r[V[9+y-D { kX+9U"`
C nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); k7Qs#L break; (_!I2"Q* } 9) ,|h } {aq)Y>o5:T else #R:&Irh break; m<)`@6a/ } cfilH"EK } 9Bw#VQ catch(IOException e){e.printStackTrace ();} }eW<P079 catch(Exception e){e.printStackTrace ();} Bm,Vu 1]t $OdBuJA 'tw
]jMD Utility.log(nFileLength); GS=E6 qEXN}Pq< SepwMB4@ return nFileLength; bEj}J_# } #+p- P`{$7ST'Hh 14 ,t //保存下载信息(文件指针位置) J9!/C#Fm private void write_nPos() $/C1s"C@O { q`/J2r+O try{ ~v;+-*t output = new DataOutputStream(new FileOutputStream(tmpFile)); ~tt\^:\3~S output.writeInt(nStartPos.length); .4R.$`z4 for(int i=0;i<nStartPos.length;i++) %Z <{CV { ZIa,pON // output.writeLong(nPos); MTCfs~}m output.writeLong(fileSplitterFetch.nStartPos); tB"9%4]( output.writeLong(fileSplitterFetch.nEndPos); {&>rKCi } 2b"DkJj' output.close(); Cs[d:T } fn,hP_ catch(IOException e){e.printStackTrace ();} RC[Sa wA catch(Exception e){e.printStackTrace ();} 'nGUm[vh } *!$Z5Im 3m!tb) iLZY6?_^ //读取保存的下载信息(文件指针位置) N10U&L'w private void read_nPos() 18sc|t { 5]LWWjT try{ 5 | , b DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I/tMFg int nCount = input.readInt(); ap )B%9 nStartPos = new long[nCount]; Uzzm2OS` nEndPos = new long[nCount]; D0xQXC3$` for(int i=0;i<nStartPos.length;i++) qjhV/fsfb { F/BR#J1 nStartPos = input.readLong(); t!3N|`x nEndPos = input.readLong(); u-,}ug| } lTqlQ<`V input.close(); DbH;DcV7 } [Cv./hEQi catch(IOException e){e.printStackTrace ();} RYEZ'< catch(Exception e){e.printStackTrace ();} I:iMRvp } N4C7I1ihq ; $80}TY ' a24 AmoWx private void processErrorCode(int nErrorCode) )S%t)} { iBAP,cR?` System.err.println("Error Code : " + nErrorCode); z``wqK } )
yMrET
m iO5g30l aim\3y~ //停止文件下载 YPI)^ } public void siteStop() c**&, aL { c#}K,joeU bStop = true; Q l)hIf$Oo for(int i=0;i<nStartPos.length;i++) i m;6$3 fileSplitterFetch.splitterStop(); B ??07j j8&NscK) A)sYde( } {m>ylE } I*
C~w //负责部分文件的抓取 rMx Iujx **FileSplitterFetch.java ulIEx~qP */ A,DBq9Z+4R package NetFox; D1xGUz2r v>} +->f b^d{$eoH?| import java.io.*; H"l4b4)N\ import java.net.*; G$i)ELs 950N\Y@u q%dG>! public class FileSplitterFetch extends Thread {
< v] p
4>ThpX "g^i% String sURL; //File URL zk8)!Af long nStartPos; //File Snippet Start Position {s0%XG1$ long nEndPos; //File Snippet End Position $C\ETQ@ int nThreadID; //Thread's ID qXW\/NT"p< boolean bDownOver = false; //Downing is over pVy=rS- boolean bStop = false; //Stop identical 0wv#AT FileAccessI fileAccessI = null; //File Access interface TSP%5v;Dh A%.mIc. R}Lk$#S# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException dyWp'vCQs\ { (CxA5u1|l this.sURL = sURL; 1^WGJ"1 this.nStartPos = nStart; f*XCWr this.nEndPos = nEnd; R}=5:)%w nThreadID = id; ?ZRF]\dP] fileAccessI = new FileAccessI(sName,nStartPos);//定位 p5fr}#en } :'Qiwf& `sYFQ+D#O M@A3+v%K public void run() aDNB~CwZZ { ;yt6Yp.6e while(nStartPos < nEndPos && !bStop) ?N<My&E { ;9T}h2^`B %f1%9YH h$l/wn try{ }%jF!d URL url = new URL(sURL); R#d~a;j HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Zok{ndO@|f httpConnection.setRequestProperty("User-Agent","NetFox"); /YvXyi>^"% String sProperty = "bytes="+nStartPos+"-"; Z;.-UXat httpConnection.setRequestProperty("RANGE",sProperty); ]5Uuz?:e Utility.log(sProperty); BkB>eE1)Ea \#9LwC"8; Q4"\k.
? InputStream input = httpConnection.getInputStream(); +'?Qph6o,7 //logResponseHead(httpConnection); |
;tH?E /sKL|]i= l/X_CM8y~ byte[] b = new byte[1024]; &R72$H9C8i int nRead; S:_Ms{S while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) YO7U}6wBt { EJkHPn nStartPos += fileAccessI.write(b,0,nRead); ;?2)[a //if(nThreadID == 1) hC:'L9Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4qOzjEQ } ~$HB}/ Y_'ERqQ n N<N~ Utility.log("Thread " + nThreadID + " is over!"); t/iI!} bDownOver = true; I@'[> t //nPos = fileAccessI.write (b,0,nRead); 6 Xvpk1 } ]<f)Rf">:` catch(Exception e){e.printStackTrace ();} >H;i#!9, } FQ<-Wc } 7]h %?W! ]ZY2\' $xbC^ k //打印回应的头信息 9pp+<c public void logResponseHead(HttpURLConnection con) ;28d7e} { *r`=hNr for(int i=1;;i++) v/`D0g-uX) { (u,)v_Oo]a String header=con.getHeaderFieldKey(i); c?A$Y?|9 if(header!=null) v"bWVc~H //responseHeaders.put(header,httpConnection.getHeaderField(header)); T`bYidA Utility.log(header+" : "+con.getHeaderField(header)); ,"%C.9a else Z,).)y#B break; Ma^jy. } }T?X6LA$I8 } 4era5= ) O0Cz n 8MJJ w; public void splitterStop() AjVC{\Ik { m!V,W*RNr bStop = true; k"N>pjgd$ } %~LY'cfPse zKQ<Zr HGQ</5Z } sfM"!{7 FZe/3sY
=z.j{% /* G]K1X"W? **FileAccess.java #I/P9)4 *//文件访问(定位,写) oB:7R^a package NetFox; 1V%tev9a import java.io.*; jRK}H*uem Y <6|z3 #dauXUKH public class FileAccessI implements Serializable{ kuEXNi1l `a83RX_\ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 n2U
&}O RandomAccessFile oSavedFile; ]>n{~4a long nPos; 3<xE_ \DR BhJ>G% VE|:k:}; public FileAccessI() throws IOException ^h[6{F~J { 1WUSp;JMl this("",0); ZbFD |~[ V } 'oa.-g 5 o=m5AUe?J 7)rQf{q7 public FileAccessI(String sName,long nPos) throws IOException {?qfH>oFA { }a]`"_i;[ oSavedFile = new RandomAccessFile(sName,"rw");
|Xso}Y{ this.nPos = nPos; NQdwj>_a oSavedFile.seek(nPos); x93@[B*% } |+cz\+ t~+M>Fjm?d <y6`8J7: public synchronized int write(byte[] b,int nStart,int nLen) PQHztS" { -)V0D,r$[ int n = -1; BZeEZ2" try{ pzF_g-B oSavedFile.write(b,nStart,nLen); T\6Qr$t n = nLen; 2I.FSR_G? } y1V}c, catch(IOException e) PR{ubMn { d^v#x[1msZ e.printStackTrace (); N63?4'_W } Ia2WBs= 1c$pz:$vX l)u%`Hcn return n; |IAx!Z-P } ndSu-8?L mF6-f#t>H+ 6uRE9h| } xdSMYH{2A 8lF9LZ8 }QE.|.fA1 /* ;}B=g/C **SiteInfoBean.java m$8siF{<q */ #qd!_oN package NetFox; >tg)F|@ 4H8r[ `m 5\ public class SiteInfoBean { Es=G' au [@K'}\U^+ H1N@E}> | private String sSiteURL; //Site's URL (kL"*y/"p private String sFilePath; //Saved File's Path v`h>5#_[ private String sFileName; //Saved File's Name d?oXz| ;H( private int nSplitter; //Count of Splited Downloading File (B#FLoK R@\fqNq _S_,rTf& public SiteInfoBean() |~9jO/&r {//nSplitter的缺省值为5 eaRa+ <#u //default value of nSplitter is 5 HNZ$CaJh this("","","",5); iM .yen_vp } VwR\"8r3 `I7s|9-= a~KtH;7< public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) IADSWzQ@ { B>u`%Ry& sSiteURL= sURL; jOhAXe;~X{ sFilePath = sPath; `
nX,x-UM sFileName = sName; )!(gS, this.nSplitter = nSpiltter; <$A,|m >MYxj}I4{z FK BRJ5O } p\zqZ=s 9/"&6, A1zRzg4 I public String getSSiteURL() eC/{c1C { x8lBpr return sSiteURL; ~&:-c v } F=F84_+K ww|fqx? ?>7\L'n=5I public void setSSiteURL(String value) 0A}XhX { veDv14 sSiteURL = value; zlLZ8b+ } d.}65{F,x sI\NX$M C6ql,hR^h` public String getSFilePath()
Gs#9'3_U5 { &>-'|(m+2 return sFilePath; k4#j
l<R } 8wWp+Hk #19O5 #X]*kxQ< public void setSFilePath(String value) xxGm T.& {
R &1>\t sFilePath = value; IB|!51H } kR+}7G+ !>(uhuTBF :V(C+bm * public String getSFileName() fBX@
MedC { %:C6\4 return sFileName; a;$V;3C{b& } 2IJniS=[> Xau%v5r 1n8y4k) public void setSFileName(String value) Q`i@['?p { A^lm 0[3q sFileName = value; 9>{ml&$ } @+;.W>^h .i\FK@2 ;)ay uS sQ public int getNSplitter() QXj #Brp { $`OyGeq"T return nSplitter; d/GSG%zB } tnpEfi- IV~)BW leT C32*RNG?U public void setNSplitter(int nCount) f)vnm*&- { B\D)21Ik}% nSplitter = nCount; 8Z}%,G*n } 3]S_w[Q4 } / 8O=3 )h ,v(Rxa OGEe8Z9Jt /* <uU<qO;6 **Utility.java @nqM#
*/
[<r.M<3 package NetFox; b4:{PD~Mh K1YxF jNbVp{%/S} public class Utility { jhRr! _G)A$6weU ;Q3[} ]su public Utility() 62;xK-U { nK< v (e_<~+E = ~s+<9c] } _an0G?7 q4X(_t //线程睡眠 Z|KDi
`S public static void sleep(int nSecond) Lapeh>1T { -[N9"Z, try{ U8aVI Thread.sleep(nSecond); /IcGJ&; } Q~.t8g/ catch(Exception e) ~(*tcs]hY { +DQUL|\ e.printStackTrace (); 8@ f!,!Wn } \ v+>qY<q } T!?tyW XR VZU~ZV //日志 ?(zCv9Pg public static void log(String sMsg) z3[J
sE% { 1tO96t^d% System.err.println(sMsg); v?8i;[ } PcbhylKd +*Wlj8 lA4-ZQ2Zp[ public static void log(int sMsg) 6
o { W.s8!KH: System.err.println(sMsg); F6J]T6Y } .[eC w } ,^n&Q'p3 6?lAbW -vm1xp$ /* E"[p_ALdC **TestMethod.java wIAH,3! */ !m))Yp-"H package NetFox; N,B!D~@ b
IxH0=f {o^tSEN!- public class TestMethod { bD/ZKvg #B <% -Sh&x public TestMethod() 2\&3x}@ { ///xx/weblogic60b2_win.exe s[eSPSFZ try{ Q%~BD@Io SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 67/\0mV:~ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); xC5Pv"> SiteFileFetch fileFetch = new SiteFileFetch(bean); (!b)<V* fileFetch.start(); !\VEUF,K? } s%rmfIp" catch(Exception e){e.printStackTrace ();} MrUjqv6a[ u,:hT]
~+ GL>YJ% } Yx,E5}- _'G'>X>}WU G3y8M|: public static void main(String[] args) ]7TOA$Q { Q3hSWXq' new TestMethod(); 5|jY } H;<>uELie } QoUdTIIL 点击下载更多相关资料
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