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/* #!# X3j **SiteFileFetch.java j88sE MZ */ FH`&C*/F0Y package NetFox; #q.G_-H4J@ import java.io.*; @6'E8NFl import java.net.*; IkNt!
2s_ pY#EXZ# Q.dy
$`\ public class SiteFileFetch extends Thread { BM~niW;k h]$?~YE chzR4"WZFt SiteInfoBean siteInfoBean = null; //文件信息Bean G<6grd5PP long[] nStartPos; //开始位置
D#}Yx]Q1 long[] nEndPos; //结束位置 dU^<7 K:S FileSplitterFetch[] fileSplitterFetch; //子线程对象 4 xzJql long nFileLength; //文件长度 #gJ~ {tA: boolean bFirst = true; //是否第一次取文件 ~U6YN_W boolean bStop = false; //停止标志 HTyF<K File tmpFile; //文件下载的临时信息 U*"cf>dB( DataOutputStream output; //输出到文件的输出流 >=:T
ZU A=]F_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) UZXcKl>u public SiteFileFetch(SiteInfoBean bean) throws IOException f.)F8!! { C_ZD<UPA\ siteInfoBean = bean; RXS| -_$ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @"Fp;Je\bN tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Zbh]SF{3F if(tmpFile.exists ()) (,c?}TP { :_,]?n bFirst = false; yZ)aKwj%U read_nPos(); B~g05`s } >fA@tUQB else wW! r}I# { tDHHQ nStartPos = new long[bean.getNSplitter()]; S*m`' nEndPos = new long[bean.getNSplitter()]; L[Yp\[#-q } [aZ v?Z 'BdmFKy1 u$=ogp=0 K[>@'P}y } 0ij~e< K&IrTA
j} )cqDvH public void run() %X,B-h^ { <_a70"i //获得文件长度 Lr}b, //分割文件 :&0yf;>v //实例FileSplitterFetch K
l0tyeT //启动FileSplitterFetch线程 <+-Yh_D //等待子线程返回 3ES[ N.V# try{ 7l#2,d4 if(bFirst) "^
6lvZP( { ')u5 l nFileLength = getFileSize(); 5hH6G if(nFileLength == -1) 4$zFR}f { 0fPHh>u System.err.println("File Length is not known!"); 0gOrW= } yLgKS8b else if(nFileLength == -2) B=gsd0^] { 29iIG
'N System.err.println("File is not access!"); ( ztim } Z]aK' else /y9J)lx { G V:$; for(int i=0;i<nStartPos.length;i++) si^4<$Nr%j { $vTAF-~Ql nStartPos = (long)(i*(nFileLength/nStartPos.length)); eN]>l } s!hI:$J. for(int i=0;i<nEndPos.length-1;i++) ne"?90~ { O@r.> nEndPos = nStartPos[i+1]; {7=WU4$ } #6N+5Yx_[ nEndPos[nEndPos.length-1] = nFileLength; LmXF`Y$ } o=-Vt,2{ } 0eqi1;$b] pFsCd"zv UR1JbyT //启动子线程 dSe8vA!) fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /UpD$,T|^| for(int i=0;i<nStartPos.length;i++) 5@+4 { )+n,5W fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y^f94s:2S siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O}K_l1 nStartPos,nEndPos,i); MegE--h Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 80?6I%UB< fileSplitterFetch.start(); &o*s !u } IpWy)B>Fl3 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s&dO/}3uR] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 29Gwv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", aNE9LAms nEndPos = " + nFileLength); k_D4'(V:b // fileSplitterFetch[nPos.length-1].start(); %RQ C9! ~A`&/U gDQkn {T.% //等待子线程结束 bBUbw *DF) //int count = 0; bp]^EVx //是否结束while循环 ORGv)>C| boolean breakWhile = false; q&XCX$N `fBG~NDw OUEI~b1 while(!bStop) Sl3KpZ {
4%g6_KB write_nPos(); FI]P<)*r Utility.sleep(500); W@I
02n2H breakWhile = true; hLb;5u&!kW L`9TB"0R+ "?apgx 6 for(int i=0;i<nStartPos.length;i++) '[Mlmgc5 { T-4/d5D[ if(!fileSplitterFetch.bDownOver) $ A-+E\vQ@ { &/Eg2 breakWhile = false; ;i<$7MR.e break; }JRP,YNh } m7$8k@r } Jy \2I{I' if(breakWhile) iO!27y break; SArfczoB
w3^NL(> TT'Ofvdc //count++; Ne3R.g9;Z //if(count>4)
pv$mZi4i // siteStop(); gRBSt
M&hU } 6}ce1|mkg/ <&4nOt "mP&8y9F System.err.println("文件下载结束!"); "r
u]?{v } sU\c#|BSC" catch(Exception e){e.printStackTrace ();} ,eR8~(`= } R)ERxz# FY$fV"s ujU=JlJ7dl //获得文件长度 /QQ8.8=5 public long getFileSize() l
:/&E 6 9 { C)NC&fV int nFileLength = -1; ?a
S% try{ dd]?9 URL url = new URL(siteInfoBean.getSSiteURL()); mw_ E&v HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nSS>\$ httpConnection.setRequestProperty("User-Agent","NetFox"); d')-7C !BDUv( BT]ua]T+ int responseCode=httpConnection.getResponseCode(); *l{yW"Su if(responseCode>=400) L'lF/qe^ { Cezh l processErrorCode(responseCode); %?bcT[|3 return -2; //-2 represent access is error wJgX/W } P.djd$#
|g%mP1O I]h-\;96 String sHeader; h35Hu_c& 2#3^skj UfO7+_2 for(int i=1;;i++) b;#\~(a { 5!Bktgk. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); IS BV%^la| //Utility.log(in.readLine()); w1r$='*I sHeader=httpConnection.getHeaderFieldKey(i); BYi)j6" if(sHeader!=null) XF|WCZUnY% { q@n^ZzTx if(sHeader.equals("Content-Length")) 6 "U8V?E { JS2nXs1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 3NIUW!gr break; +E/y ~s } ;
dd Q/ } Gs
dnf 7 else QK; T~
_k break; Z)pz, } PmR* }Aw } w\w(U catch(IOException e){e.printStackTrace ();} O oSb>Y/4 catch(Exception e){e.printStackTrace ();} /\Z J
wvMW| K=?VDN Utility.log(nFileLength); ,Q/Ac{C ?m0IehI @ {#mpDX return nFileLength; hXn3,3f3oZ } rR,2UZR uS+k^
# !:CJPM6j3 //保存下载信息(文件指针位置) nmFC%p)4 private void write_nPos() }P9Ap3? { K93p"nHN try{ !}KqB8; output = new DataOutputStream(new FileOutputStream(tmpFile)); k+^'?D--'P output.writeInt(nStartPos.length); ~D[?$`x: for(int i=0;i<nStartPos.length;i++) '
GG=Ebt { ;heHefbvvd // output.writeLong(nPos); !@A#=(4R4 output.writeLong(fileSplitterFetch.nStartPos); Ucdj4[/,h output.writeLong(fileSplitterFetch.nEndPos); {@Y } 7^*"O&y_al output.close(); v$wBxCY } <3okiV=ox catch(IOException e){e.printStackTrace ();} i/So6jW catch(Exception e){e.printStackTrace ();} jJZgK$5+ } lb*8G fyWO <?Wti_ /M //读取保存的下载信息(文件指针位置) LjB;;&VCn private void read_nPos() !T,AdNa8 { sZ<9A Xk-E try{ 6t'l(E + DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); -fI@])$9J int nCount = input.readInt(); TXXy\$ nStartPos = new long[nCount]; RW$:9~ nEndPos = new long[nCount]; f:B>zp;N for(int i=0;i<nStartPos.length;i++) ,m<H-gwa { SLfFqc+n0 nStartPos = input.readLong(); )~6zYJ2 nEndPos = input.readLong(); NS)}6OI3~" } &sXRN&Fp input.close(); dsx]/49< } <"D=6jqZ catch(IOException e){e.printStackTrace ();} 2F#q
I1 catch(Exception e){e.printStackTrace ();} Sn4[3JV $l } hw N?/5 C:8_m1Y{ 3@Z#.FV~C[ private void processErrorCode(int nErrorCode) 1?* { "P-lSF?T System.err.println("Error Code : " + nErrorCode); 7pA/ } 38DT2<qC Eodn/ jn >d*9u //停止文件下载 Uo12gIX public void siteStop() Io4(f { @~c6qh bStop = true; ##Q/I| for(int i=0;i<nStartPos.length;i++) =0;}K@(J fileSplitterFetch.splitterStop();
c gzwx )*; zW!H 3p2P=
T } ")O`mXg- } #_Z$2L"U //负责部分文件的抓取 i
wxVl)QL **FileSplitterFetch.java :ISMPe3' */ T,xPSN2A* package NetFox; wn_b[tdxq K7Rpr.p oI)GKA_Ng7 import java.io.*; kn)t'_jC import java.net.*; A;\7|'4 ZxV"(\$n MX4]Vpv public class FileSplitterFetch extends Thread { E9?phD \AL
f$88>@ O+}qQNe< String sURL; //File URL I;Vu W long nStartPos; //File Snippet Start Position lEHzyh}2k long nEndPos; //File Snippet End Position J!'@ Bd int nThreadID; //Thread's ID mUS_(0q boolean bDownOver = false; //Downing is over |FD }e) boolean bStop = false; //Stop identical N2.AKH FileAccessI fileAccessI = null; //File Access interface Og=*R6i +f*OliMD WTImRXK4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Dfq(Iv { 3~nnCR[R this.sURL = sURL; GA7}K:LP'k this.nStartPos = nStart; v1a6?- this.nEndPos = nEnd; 5M9 I, nThreadID = id; 3%.#}O,( fileAccessI = new FileAccessI(sName,nStartPos);//定位 'v]u#/7a
} \:'%9 x ,+~rd4a &\apwD public void run() @+ atBmt { _`64gS}^ while(nStartPos < nEndPos && !bStop) pABs!A`N { Oft4-4$E ]E] 2o V+I|1{@i0 try{ *N{emwIq URL url = new URL(sURL); #v<QbA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
Z*-g[8FO httpConnection.setRequestProperty("User-Agent","NetFox"); UQB"v3Z String sProperty = "bytes="+nStartPos+"-"; P(t[
eXe httpConnection.setRequestProperty("RANGE",sProperty); tK&'<tZh Utility.log(sProperty); LBF 1;zjK l x,"EOP meOMq1 InputStream input = httpConnection.getInputStream(); eds26( //logResponseHead(httpConnection); rk)##) +[5.WC7J
ss5m/i7 byte[] b = new byte[1024]; Yv:55+ e!| int nRead; v%fu while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;A#`]-i C { =zyC-;r! nStartPos += fileAccessI.write(b,0,nRead); byv[yGa` //if(nThreadID == 1) W3iZ|[E; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?(R]9.5S } Y[L-7^o@y 1 5A*7| A'2w>8 Utility.log("Thread " + nThreadID + " is over!"); -YsLd 9^4 bDownOver = true; ATR!7i\| //nPos = fileAccessI.write (b,0,nRead); 8>7&E- } 9'r:~O catch(Exception e){e.printStackTrace ();} (&!NC[n, } {l |E:>Q2 } up'Tit |^A ;&// _)\c&.p]f //打印回应的头信息 3;a<_cE*@ public void logResponseHead(HttpURLConnection con) yrR1[aT { zToq^T for(int i=1;;i++) 8O Soel { p ZZc:\fJ String header=con.getHeaderFieldKey(i); s M +WkN}{ if(header!=null) &B|D;|7H //responseHeaders.put(header,httpConnection.getHeaderField(header)); VZ\B<i Utility.log(header+" : "+con.getHeaderField(header)); *W
kIq> else nB!&Zq break; f aLtdQi } ]niJGt } D_x+:1( #y%!\1M/:A ^.>jGI%rB public void splitterStop() Yh>]-SCw { .B\ 5OI,] bStop = true; U{VCZ*0cj } TY Qwy* AGbhJ=tB LU9A# } #b~JDO( bP^Je&nS* :duo#w"K /* B`
k\ EL' **FileAccess.java KhMSL *//文件访问(定位,写) =J ym%m package NetFox; T,VY.ep/ import java.io.*; ObiT-D?)g &0`)
Q 3%E74 mOcD public class FileAccessI implements Serializable{ qcN'e.A -*XCxU' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p8]68!=W\F RandomAccessFile oSavedFile; B4mR9HMh long nPos; Q^#;WASi +mp@b942* ,j$Vvz public FileAccessI() throws IOException !Uq^7Mw { di>cMS 4 c this("",0); fF V!)Zj } 8f3vjK'
0gfA#|' Ba/Yl public FileAccessI(String sName,long nPos) throws IOException qIAoA. { Sx8OhUyux oSavedFile = new RandomAccessFile(sName,"rw"); oD$J0{K6 this.nPos = nPos; <Ce2r"U1e oSavedFile.seek(nPos); 2!$gyu6bpG } 7Ddaf> =-}[^u1 m2v'WY5u public synchronized int write(byte[] b,int nStart,int nLen) QJ7L7S { z~>pVs int n = -1; Y14W?|KOB try{ WuZ/C_ oSavedFile.write(b,nStart,nLen); pf_mf. n = nLen; Z>^pCc\lH } MKWyP+6` catch(IOException e) f0BdXsV#g { _z1(y}u} e.printStackTrace (); ]TyisaT } )uqA(R> Co3:*nbRv W[^qa5W<FB return n; B0ndcB- } ~fo6*g:f1 ;JRs?1<=' A4]s~Ur } zD?K>I = Jzp#bgq}| bpxeznz /* FSRj4e1y1 **SiteInfoBean.java G2^et$<{uU */ VV9_`myN7 package NetFox; A+UU~?3y Zw~+Pb w$u3W*EoU^ public class SiteInfoBean { wW%4d %bdjBa} (k|_J42[ private String sSiteURL; //Site's URL HWVtop/ private String sFilePath; //Saved File's Path ~jb"5CX private String sFileName; //Saved File's Name MX ;J5(Ae private int nSplitter; //Count of Splited Downloading File 5A4&+rdU v$ub~Q6W d` [HT`` public SiteInfoBean()
(X?/"lC) {//nSplitter的缺省值为5 3q?\r`
a //default value of nSplitter is 5 =2
*rA'im this("","","",5); :(H> 2xS,s } yZWoN& >B>CB3U Vy|6E#U public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) HyR!O> { 41_SRh7N sSiteURL= sURL; E(i[o? sFilePath = sPath; }E7:ihy sFileName = sName; k}#;Uy=5 this.nSplitter = nSpiltter; ymNnkFv \fjMc }' FPJd| } jU5 }\oP@ W'on$mB5< 3<=G?of public String getSSiteURL() E.iSWAJ(w { ?}B: return sSiteURL; oY=q4D } _A~4NW{U7
kZ=s'QRgL OK{xuX8u public void setSSiteURL(String value) C8L'si { x{&w?ng sSiteURL = value; @p|$/Z%R, } ^Eo=W/
PG]%Bv57 Zx$ol;Yd public String getSFilePath() Ea(,aVlj { O MX-_\") return sFilePath; <vUVP\u~$ } ^bLRVp1 8/"fWm/ ')N{wSM9Ft public void setSFilePath(String value) 2:LHy[{5 { d`
Sr4c sFilePath = value; eVl'\aUd } 'r\ V.4 5ZY)nelc Urgtg37 public String getSFileName() 4c+$%pq5 { ="d*E/## return sFileName; pDhse2 } g`>og^7g :L
3&FA J# kl
7 public void setSFileName(String value) 1h7+@#<:a { A!63p$VT; sFileName = value; _3Cn{{ A0 } &5t :H 8b yE} dj)wd :h,`8 Di public int getNSplitter() gLsU:aeCT { :|1.seLQ return nSplitter; ]h9!ei
[ } !rhk
$L ~np,_yI 8Q)@ public void setNSplitter(int nCount) \/|)HElKR { z}Jr^> nSplitter = nCount; =xianQ<lK } rx :z#"?I } 4@;-%H&7 OJ4SbI ~svO*o Wa /* +2C?9:bH **Utility.java +{53a_q */ {0YAzZ7 package NetFox; OVk~N) IK^~X{I? (ozb%a#B public class Utility { nF)uTk ?nKF6f )$x_!=@1 public Utility() 'YSuQP> { !~-6wN"k jQj,q{eA v$w++3H } !Ngw\@f q\9d6u=Gm //线程睡眠 `&$B3)Eb public static void sleep(int nSecond) 7k=fZ$+O { mE#nU(+Ta try{ yy(A(} Thread.sleep(nSecond); Ov9Q?8KzM } XT@Mzo49z\ catch(Exception e) >[a<pm! { RM*f|j e.printStackTrace (); W$?e<@ } D>wZ0p b- } %kU'hzLg .gYt0raSY //日志 ~S(^T9R public static void log(String sMsg) yi!`V. { FE m=w2 System.err.println(sMsg); rj H` } Qu~*46?0 -)w]a{F 'dt\db5p public static void log(int sMsg) mrZ`Lm#>pS { 9XV^z*E(J System.err.println(sMsg); 7!2
HNg }
CB*/ =Y }
U w Eiz KAb(NZK 6f]r Q9 /* .RRlUWu **TestMethod.java ^@.G,u */ Q_}/ Pn$1 package NetFox; qa!RH]B3 wRVD_? mtw9AoO public class TestMethod { ,d
7Z FDLd&4Ex 5}a"?5J^ public TestMethod() ]C *10S` { ///xx/weblogic60b2_win.exe SFO&=P:U try{ cgyo_
k
SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &`@M8-m#F //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); pT=2e& SiteFileFetch fileFetch = new SiteFileFetch(bean); * bZ\@Qm fileFetch.start(); ex phe+b } YsAF{ catch(Exception e){e.printStackTrace ();} V.,bwPb{9 V} bM!5 H 2z-$zB<vyw } t:9
ZCu ay K^ 6+Ily cV]y=q6 public static void main(String[] args) ~V$ f#X { BE%Z\E[[m new TestMethod(); 2nx9#B*/T } aQh?}=d a } 0P9Wy!f7 点击下载更多相关资料
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