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/* |P~TZ **SiteFileFetch.java keCM}V`?" */ 6fQQKM@a| package NetFox; h<.&,6R import java.io.*; \%rX~UhZ= import java.net.*; ; v>2z!M 8 w^i 1j3mTP public class SiteFileFetch extends Thread { BWz*!( O,XVA If2f7{b SiteInfoBean siteInfoBean = null; //文件信息Bean 8@Y]dzgjj long[] nStartPos; //开始位置 K^?/ long[] nEndPos; //结束位置 ~B|K]&/] FileSplitterFetch[] fileSplitterFetch; //子线程对象 c?j /H$ long nFileLength; //文件长度 &F)P3= boolean bFirst = true; //是否第一次取文件 pz#oRuujY boolean bStop = false; //停止标志 ->$Do$ File tmpFile; //文件下载的临时信息 )Q&:$] DataOutputStream output; //输出到文件的输出流 `A3"*,|z U''/y\Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) E0Ig/
j public SiteFileFetch(SiteInfoBean bean) throws IOException S0,p:Wey { `a98+x?JF siteInfoBean = bean; @e3O=_m- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =P-kb^ s tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $5s?m\!jZz if(tmpFile.exists ()) ^4h/6^b0c { M&:[3u- bFirst = false; +t,JCY6 read_nPos(); tNG0ft%a } K;k&w; j else I?EtU/AD { (O"Wa nStartPos = new long[bean.getNSplitter()]; 9jCn|+ nEndPos = new long[bean.getNSplitter()]; pa`"f&JO } "+~La{POc :Fm;0R@/k z ~#
.Ey ;r B2Q H] } OB.TAoH: DwMq 6X$]d^)h{ public void run() a;r,*zZ=" { Lf4c[[@%gd //获得文件长度 dmgoVF_qR //分割文件 [u`v'*0d //实例FileSplitterFetch o $7:*jU //启动FileSplitterFetch线程 ?suxoP% //等待子线程返回 ^7G@CBic" try{ z'z_6]5 if(bFirst) U(4>e! { 2_'{f1bVxz nFileLength = getFileSize(); A NR?An if(nFileLength == -1) 1MkQ$v7m { F=?0:2P0bD System.err.println("File Length is not known!"); 0<d9al|J } C2OBgM+ else if(nFileLength == -2) ,UNCBnv1 { (,*e\o System.err.println("File is not access!"); :08b&myx } J$Uj@M else uQk} { U.g7' `Z< for(int i=0;i<nStartPos.length;i++) xn|M]E1) { =BW;n]ls nStartPos = (long)(i*(nFileLength/nStartPos.length)); }TfZ7~o[ } .dM4B'OA? for(int i=0;i<nEndPos.length-1;i++) $2I^ ;5r[ { %P@V7n nEndPos = nStartPos[i+1]; zmaf@T } h\dq]yOl nEndPos[nEndPos.length-1] = nFileLength; wyWe2d } *f<+yF{=A } X0G6Wp b`:n i
"Bn8WT2? //启动子线程 $o}Ao@WkO fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >(T)9fKF for(int i=0;i<nStartPos.length;i++) pe%$(%@v { `_"F7Czn fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F%|F-6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :qlcN @_ nStartPos,nEndPos,i); T'C^,,if Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r2!\Ts 5v fileSplitterFetch.start(); b~oQhU??" } Uphme8SX // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'tyblj C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); K3g<NC // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", g_8A1lt nEndPos = " + nFileLength); #^FDG1= // fileSplitterFetch[nPos.length-1].start(); '\g-z <?8aM7W7 2&b?NqEeZ //等待子线程结束 ;-]' OiS; //int count = 0; "|k 4<"] //是否结束while循环 "2m (*+ boolean breakWhile = false; ."X}A
t r3OR7f[ |J:|56kVZq while(!bStop) kMS&"/z { IJ[r!&PY write_nPos(); h&|PHI Utility.sleep(500); oeKVcVP|'& breakWhile = true; sd
m4zV]& arWP]%E0W a*kvU "] for(int i=0;i<nStartPos.length;i++) n5qg6(Tl] { 6,~Y(# if(!fileSplitterFetch.bDownOver)
fV(WUN+ { ovXU +8 breakWhile = false; 4it^-M break; s;!_'1pi@ } 4AWL::FU5 } R`HC
EX) if(breakWhile) ye^*Z>| break; u5Tu~ gJFx#s0?6. 7B@1[ //count++; gVscdg5 //if(count>4) 1OI/,y8} // siteStop(); h<0&|s*a) } &02I-lD4+ '_~qAx@F#c )Vf!U" System.err.println("文件下载结束!"); \?_M_5Nb } }nx5 catch(Exception e){e.printStackTrace ();} N|5fkx<d^ } b2r]>*Vc ;R[w}#Sm `EdZ //获得文件长度 xg;I::hE7X public long getFileSize() 3YO%$ { % B^BN|r int nFileLength = -1; F%ffnEJg try{ oAprM Z7Y URL url = new URL(siteInfoBean.getSSiteURL()); X#Sgf|$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]tx/t^&/\u httpConnection.setRequestProperty("User-Agent","NetFox"); %M5{-pJ|C or
qL0i *Roqie int responseCode=httpConnection.getResponseCode(); 'ju'O#A9 if(responseCode>=400) ,^1B"#0{C< { #V$h?`qhwr processErrorCode(responseCode); @L ,4JPk return -2; //-2 represent access is error [pxC3{|d$ } #ZyY(S1. SH6+'7 JKTn String sHeader; b*)F7{/Z ,(3oAj\ S;^'Ek"Z. for(int i=1;;i++) Tf40lv+{ { +5x{|!Pn //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "lRxatM //Utility.log(in.readLine()); \C<'2KZR, sHeader=httpConnection.getHeaderFieldKey(i); QV[#^1 if(sHeader!=null) L\zyBfK} { G{74o8 if(sHeader.equals("Content-Length")) hem>@Bp'V { A5E^1j}h@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); B9dc* break; h?Lp9VF } VA5f+c/ % } 2.
q\!V}yQ else j6WDh}# break; K=1prv2 } _<%YLv } O>"T* catch(IOException e){e.printStackTrace ();} Vg(FF" catch(Exception e){e.printStackTrace ();} ^'p!#\T;H a+^,EY ;}H*|"z;! Utility.log(nFileLength); ?G[=pY:= /?NfU.+K {>Hn:jW<. return nFileLength; 3 MCV?"0 } mu2|%$C;$ SLz;5%CPV \}J"`J\Q //保存下载信息(文件指针位置) d&lT/S private void write_nPos() E/<n"'0ek { h_Ssm{C\ try{ z.|[g$F output = new DataOutputStream(new FileOutputStream(tmpFile)); hU3sEOm> output.writeInt(nStartPos.length); &4wwp !J for(int i=0;i<nStartPos.length;i++) i|rC Ga0} { Lvrflx*Q // output.writeLong(nPos); JS/~6'uB output.writeLong(fileSplitterFetch.nStartPos); \opcn\vW output.writeLong(fileSplitterFetch.nEndPos); A;k#8&; } ;9<?~S output.close(); Yx&d\/9 }
#qARcxbK| catch(IOException e){e.printStackTrace ();} b2H-D!YO^ catch(Exception e){e.printStackTrace ();} kQp*+ras } 2UIZ<#|D>s d@tf+_Ih _S,UpR~2W //读取保存的下载信息(文件指针位置) 3:)_oHq private void read_nPos() uPC(|U% { n5#QQk2 try{ |h\A5_0_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); RXo 6y(^ int nCount = input.readInt(); =?_:h`} nStartPos = new long[nCount]; >[&ser nEndPos = new long[nCount]; 2D a0*xn{ for(int i=0;i<nStartPos.length;i++) bM2x
(E\O { ?M^qSo=/~ nStartPos = input.readLong(); v(6[z)A0 nEndPos = input.readLong(); RY3=UeoF } =:t<!dp input.close(); @NL37C } #M<YNuE#" catch(IOException e){e.printStackTrace ();} m2&Vm~Py6b catch(Exception e){e.printStackTrace ();} D2J)qCK1) } vY"I Igw2n{})w JDW/Mc1bh private void processErrorCode(int nErrorCode) _~'MQ`P { WJI}~/z;C System.err.println("Error Code : " + nErrorCode); pNZ3vTs6 } r;{ggwY&J G$luGxl[ IwOL1\'T4 //停止文件下载 2bG92 public void siteStop() C,%Dp0 { J1w3g, bStop = true; Udf\;G@ for(int i=0;i<nStartPos.length;i++) VbTX;? fileSplitterFetch.splitterStop(); 0 d+b<J, ,%qP 5!pNo*QK } feH&Ug4?G } Ujqnl>l //负责部分文件的抓取 ;#+I"Ow **FileSplitterFetch.java EQk omjv */ 4sX?O4p package NetFox; _zzT[} :fnJp9c j}K3YfH import java.io.*; gPA8A>U)[ import java.net.*; vbX.0f "n (kyRx+gA
Lsai8 B public class FileSplitterFetch extends Thread { _/"e'@z
_|4QrZ$n( '4D7: String sURL; //File URL WnU2.: long nStartPos; //File Snippet Start Position mKyF<1,m long nEndPos; //File Snippet End Position S,udpQ7 int nThreadID; //Thread's ID ^ UhqV"[7k boolean bDownOver = false; //Downing is over Wb#<ctM> boolean bStop = false; //Stop identical I[gPW7&S@ FileAccessI fileAccessI = null; //File Access interface c6=XJvz :7X{s4AU6 {.0I!oWv public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @HnahD { [Jjo H1E@ this.sURL = sURL; Cs,Cb2[ this.nStartPos = nStart; qsN_EMgbdn this.nEndPos = nEnd; ydRS\l nThreadID = id; \VI0/G)L fileAccessI = new FileAccessI(sName,nStartPos);//定位 gNZ"Kr o6 } T,Q7 YI j|qdf3^f Xr4k]'Mg public void run() ;PqC*iz { ~(NFjCUY? while(nStartPos < nEndPos && !bStop) E7.{SGH} { Uqx@9z( bE=[P}E
V\Y,4&bI try{ 1W-kZ(e URL url = new URL(sURL); m;IKV, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7|bBC+;( httpConnection.setRequestProperty("User-Agent","NetFox"); 0LIXkF3^1 String sProperty = "bytes="+nStartPos+"-"; BPKrRex httpConnection.setRequestProperty("RANGE",sProperty); q$s)(D Utility.log(sProperty); Yt_t> vXSA_"0t $]W*;MTI} InputStream input = httpConnection.getInputStream(); hYA1N&yz@ //logResponseHead(httpConnection); HCYy9 MCIuP`sC| >}C:EnECy byte[] b = new byte[1024]; Uxe]T int nRead; Y(ClG*6 ++ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "]=XB0) { \q^dhY>) nStartPos += fileAccessI.write(b,0,nRead); d7x6r3J$ //if(nThreadID == 1) ycEp,V;[Z // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CG J_k?h } zP@\rZ @4 f{\[+> 8u"C7} N_ Utility.log("Thread " + nThreadID + " is over!"); \[8uE,=| bDownOver = true; Xg;<?g?k //nPos = fileAccessI.write (b,0,nRead); @00&J~D } 0&Iu+hv catch(Exception e){e.printStackTrace ();} =NPo<^Lae } >Il{{{\> } "CFU$~
3L4v@ xyXVWd[ //打印回应的头信息 6$csFW3R public void logResponseHead(HttpURLConnection con) K!-iDaVI { B7%m7GM for(int i=1;;i++) ZKB27D_vg> { ,ob)6P^rw String header=con.getHeaderFieldKey(i); >{0,dGm if(header!=null) uw`J5TND //responseHeaders.put(header,httpConnection.getHeaderField(header)); \@^`
G Utility.log(header+" : "+con.getHeaderField(header)); C6D
Eq>v else <#T#+uO break; -9s&OKo`({ } Q[aBxy
( } K2tOt7M! h<!!r ,twm)%caU public void splitterStop() ;M*G { HLq2avs\ bStop = true; P4s,N|bs` } ^Uik{x UGA``;f U/\LOIs } Y}r UVn U{9yfy
'^,|8A2 /*
`EVy **FileAccess.java iR'Pc3 *//文件访问(定位,写) KFM)*Icg\8 package NetFox; [R/'hH5 import java.io.*; {9nH#yv R^JtWjJR MQo/R,F } public class FileAccessI implements Serializable{ ^'hh?mL N[xa= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1@^*tffL: RandomAccessFile oSavedFile; @$o^(my long nPos; L:UPS&) M#SGZ~=1r Twk,R. O public FileAccessI() throws IOException "J%dI9tM{ { vu_ u\2d this("",0); 7JLjA\k } a,?u
2 +J2;6t EN@<z; public FileAccessI(String sName,long nPos) throws IOException Z$Vd8U;
{ 2U'Vq oSavedFile = new RandomAccessFile(sName,"rw"); OUtMel_ this.nPos = nPos; o/I`L oSavedFile.seek(nPos); WCwM+D } [xl+/F7 91}kBj H>|*D~RdT public synchronized int write(byte[] b,int nStart,int nLen) aHSl_[ { 7DWHADr int n = -1; e!1am%aE try{ )'axJ oSavedFile.write(b,nStart,nLen); 7\EY&KI"0 n = nLen; k6^!G " } >~rytg] f catch(IOException e) ew|e66Tw$ { c7t . e.printStackTrace (); h0zv@,u } 78FLy7 G[a&r h)sQ3B.}A return n; c"`CvQO64 } Ag0)> PD^ VK^m]??s_ ^,6c9Dxy } U$=#yg2
: ,2`FSL%J Y]:Ch (Q /* oO&R3zA1d **SiteInfoBean.java 2#xz,RM. */ C0
o package NetFox; Ae_:Kc6 _?c7{ w ;xbQZ|+ public class SiteInfoBean { G^qt@,n$; 9]PMti V D.T=( private String sSiteURL; //Site's URL @XN|R private String sFilePath; //Saved File's Path .[C@p`DZ private String sFileName; //Saved File's Name sJ5Ws%q private int nSplitter; //Count of Splited Downloading File cX4I+Mf %SN"<O! s1%th"e
[ public SiteInfoBean() tu5T^"BqO {//nSplitter的缺省值为5 1Y(NxC0P=g //default value of nSplitter is 5 =RjseTS this("","","",5); c,FZ{O@ } agp7zw=N pra0:oHN nIf~ds&TT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 'QC'*Hl { kKz>]t"A sSiteURL= sURL; B2l5}"{` sFilePath = sPath; ,qT+Vqpr{ sFileName = sName; ';KWHk8C this.nSplitter = nSpiltter; {YF(6wVl _o'a|=Osx> G?<uw RV } YWF Hv@ Y4{/P1F (DY&{vudF public String getSSiteURL() XS=f>e1<W { W}'l8z] return sSiteURL; g<g$c<sm } {wvBs87 ErxvGB(2 r2T$
;m. public void setSSiteURL(String value) UT_kw}1o { <HH\VG\H6 sSiteURL = value; V)A7q9Bum } q0 L\{ RwUosh\W i'p6# public String getSFilePath() 1'f& { ;e0-FF+ return sFilePath; (Rh$0^)A } G.]'pn
z-_$P)[c HsKq/Oyk public void setSFilePath(String value) %\T#Ik~3 { L [&|<<c
sFilePath = value; Egmp8:nZl@ } 13fyg7^JP SvQ!n4 $ lQ&J2H<w public String getSFileName() M}]4tAyT { KzQuLD(e return sFileName; ^ddC a } yM('!iG*/ lUd4`r" OV|n/~ public void setSFileName(String value) ]z8Th5a?o { jH k.]4&0 sFileName = value; -J>f,zA } >4bWXb'S}C %E[ $np> ogqKM_ public int getNSplitter() !m8T< LtMl { N?IdaVLj return nSplitter; N
;Cs? C } Z-3("%_$/ V/tl-;W ^%O$7* public void setNSplitter(int nCount) C!Jy;Z=+u { *onVG5< nSplitter = nCount; NfZC} } 9M-W 1prb } b^A7R{G7 3gYtu-1 r,q.RWuII /* -.K'rW **Utility.java =.l>Uw! */ F^&@[k7WW package NetFox; D;z!C
ys P MI?PC[; 8 %p+:6kP5 public class Utility { G=l:v -`$J& YU 58R.`5B public Utility() Gp=V%w\FDW { r@PVSH/ (a"/cH Jl|^^? } &3SmTg
% NTSIClm}U //线程睡眠 bK{ VjXF public static void sleep(int nSecond) $01~G?:]` { i=&]%T6Qk try{ HkY#i;%N Thread.sleep(nSecond); ru|*xNXKgC } rr>6; catch(Exception e) 5Q: %f { CZ>Ujw=&k e.printStackTrace (); {XV'C@B } olKM0K } @z:E]O} +G+1B6S //日志 Cxe(iwa. public static void log(String sMsg) C=2DxdZG { rC_saHo>#R System.err.println(sMsg); K[x=knFO
} $LcMG,8%_ A`"?~_pHC B
]sVlbt public static void log(int sMsg) /SyAjZ { 4J?\JcGs System.err.println(sMsg); ?$y/b}8 } 50a';!H } BB_(!omq[ :Ys
;)W+R BqDsf5}jpA /* 9<kMxtk$ **TestMethod.java JIqg[Mao */ t;u)_C,bmP package NetFox; L+eK)Q
m3^D~4 J|@D @\?7 public class TestMethod { 1QnaZhu' S~&9DQNj n xR\tBv public TestMethod() T0.sL9 { ///xx/weblogic60b2_win.exe _>r(T4}] try{ r;E5e]w*- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Ndyo)11z //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lR mVeq: SiteFileFetch fileFetch = new SiteFileFetch(bean); }SyK)W5Y fileFetch.start(); Y kvEQ= } ~yV?*"Hi catch(Exception e){e.printStackTrace ();} edZBQmx+# ln":j?` 9e}%2, } Qz_4Ms<o 5 PP^w~n J3B+WD] public static void main(String[] args) fhNJB0 { Ekh)l0
l new TestMethod(); zAev@+.ld } x?od_M;*8; } DF-.|-^9I 点击下载更多相关资料
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