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/* B~E">}=! **SiteFileFetch.java %W8iC%~ */ B$6KI package NetFox; E}KGZSj import java.io.*; $#-rOi / import java.net.*; n
7i5A: hsQDRx%H} ht*(@MCr< public class SiteFileFetch extends Thread { \i/HHP[% ~&<t++ g = SiteInfoBean siteInfoBean = null; //文件信息Bean IA<>+NS long[] nStartPos; //开始位置 .8Bu%Sf long[] nEndPos; //结束位置 `kJ)E;v;3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 Pjk2tf0j` long nFileLength; //文件长度 ]E-3/r$_cO boolean bFirst = true; //是否第一次取文件 1I`F?MT boolean bStop = false; //停止标志 _?:jZ1wZ File tmpFile; //文件下载的临时信息 Arg/ge.y DataOutputStream output; //输出到文件的输出流 5q*s_acQ Ea&NJ]& g //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {f\wIZ-K A public SiteFileFetch(SiteInfoBean bean) throws IOException L{P'mG=4 { {QM rgyQE siteInfoBean = bean; dkz%
Y] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /M%>M] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,IyQmN y if(tmpFile.exists ()) (ne[a2%> { a51e~mg Z` bFirst = false; !Pw*p*z read_nPos(); |J,zU6t } aSvv(iV else !Z tqh Xr { _]OY[&R nStartPos = new long[bean.getNSplitter()]; JyZuj>`
6 nEndPos = new long[bean.getNSplitter()]; o *J*}y } #Z1-+X8P mA{?E9W udqrHR5 TG}owG]] } jcJ 4? U@NCN2I n!4\w>h public void run() yf9"Rc~+ { z
)'9[t //获得文件长度 h40;Q<D //分割文件 ##6\~!P //实例FileSplitterFetch .p!
DVQ"a //启动FileSplitterFetch线程 YK)m6zW5 //等待子线程返回 gMI%!Y try{ }yK7LooM if(bFirst) x6`mv8~9Db { > O?WRCB nFileLength = getFileSize(); 8In\Jo$|q> if(nFileLength == -1) |-x-CSN { n"htx|v System.err.println("File Length is not known!"); OW@%H;b } Jz`jN~ else if(nFileLength == -2) BDI@h%tJb: { :oZ<[#p"* System.err.println("File is not access!"); 6p4BsWPx } 2.aCo, Kb; else QcL@3QC { 20V~?xs~ for(int i=0;i<nStartPos.length;i++) Zu,:}+niU { `.MZ,Xhqi" nStartPos = (long)(i*(nFileLength/nStartPos.length)); (U.Go/A#wE } ;|WUbc6&g for(int i=0;i<nEndPos.length-1;i++) OM[MRZEh G { D{N8q^Cs9 nEndPos = nStartPos[i+1]; GK}52,NM } M!J7Vj?Ps nEndPos[nEndPos.length-1] = nFileLength; +
f67y } ri{*\LV*@ } TI DgIK vW=-RTRH Qp:I[:Lr; //启动子线程 xn3 _ED fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; i]r(VKX for(int i=0;i<nStartPos.length;i++) )$:1e)d { 8X7??f1;Y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -x+3nb|. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), G$>?UQ[ nStartPos,nEndPos,i); ekhv.;N~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3:x(2 A fileSplitterFetch.start(); A0Mjk } X(ph$,[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tLy:F*1i siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ^xa, r#N:V // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", RE;A0E_3 nEndPos = " + nFileLength); "#iJ/vy // fileSplitterFetch[nPos.length-1].start(); _p*9LsN$L I1fpX | j+_fHADq //等待子线程结束 BX?DI-o^h //int count = 0; _iJ~O1qx,w //是否结束while循环
8z1z<\ boolean breakWhile = false; j9NF| b)I-do+ 5*$yY-A while(!bStop) O=2|'L'h! { I_<VGU k write_nPos(); 6j(/uF4!# Utility.sleep(500); vUpAW[[ breakWhile = true; g0grfGo2p ">bhxXeiN ZIx-mC5 for(int i=0;i<nStartPos.length;i++) P4[kW}R { >$ZG=& if(!fileSplitterFetch.bDownOver) oN1D&* { Wi&v?nm breakWhile = false; XR+
SjCA break; 0VNLhM(LM } !rUP&DA } l53i
{o if(breakWhile) >_?i)%+) break; TwkT|Piw
S &!8 WRJ =npE?wK //count++; (A~7>\r + //if(count>4) 0#]fEi // siteStop(); Bg~]u+c* } z+"$G dVb6u OMLU ;,4 System.err.println("文件下载结束!"); ^>IP"k F } {fXkbMO| catch(Exception e){e.printStackTrace ();} =p@`bx } XZ%,h ]rlZP1". ^~H}N$W"-q //获得文件长度 eg;7BZim{ public long getFileSize() Fv~lasW[ { _RIU,uJs int nFileLength = -1; p1KhI;^ try{ DU!T#H7 URL url = new URL(siteInfoBean.getSSiteURL()); '3l TI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); B#V""[Y9 httpConnection.setRequestProperty("User-Agent","NetFox"); *cb|9elF^ /whaY4__O\ )7
p"
- int responseCode=httpConnection.getResponseCode(); =?OU^u`C if(responseCode>=400) OXQ*Xpc { :TQp,CEa processErrorCode(responseCode); Ixxs( return -2; //-2 represent access is error Pm/<^z% } xWG@<}H M|DMoi8x u} mj)Nk String sHeader; Wu][A\3D1 ZE=sw}= +KTfGwKt for(int i=1;;i++) 7%^G]AFi { JH.XZM& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); P)Adb~r //Utility.log(in.readLine()); c u/"=]D sHeader=httpConnection.getHeaderFieldKey(i); N
)Z>]&5 if(sHeader!=null) W;OGdAa_ { _EMI%P&s if(sHeader.equals("Content-Length")) gQ\.|'% { GeR#B;{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ?Q]&;5o break; GY$Rkg6d } .RxT z9( } ,t`V^(PEq else vvxxwZa=O break; Nn05me"X } W22S/s } MLdwf}[ catch(IOException e){e.printStackTrace ();} 2b$>1O&2 catch(Exception e){e.printStackTrace ();} V8n {k' ,XT,t[w ,%9XG077 Utility.log(nFileLength); Vh\_Ko\V5 }QI \K e/D{^*~S return nFileLength; <,~OcJG( } x/s:/YN' OWvblEBF WESD^FK //保存下载信息(文件指针位置) bsQ'kBD private void write_nPos() NljpkeX' { (ks>F=vk* try{ M1Q&)am output = new DataOutputStream(new FileOutputStream(tmpFile)); t utk*|S output.writeInt(nStartPos.length); e1Db
+ QBV for(int i=0;i<nStartPos.length;i++) s$#64"F { &[d'g0pF // output.writeLong(nPos); p cLKE
ZK output.writeLong(fileSplitterFetch.nStartPos); 31G:[;g output.writeLong(fileSplitterFetch.nEndPos); +~"IF+TRH } Exwd,2> output.close(); ,Q"'q0hM= } k[x-O?$O@ catch(IOException e){e.printStackTrace ();} K&[0`sH! catch(Exception e){e.printStackTrace ();} `:C1Wo^< } n5QO'Jr%[ Z|qI[ui O Vl^x_gs#_] //读取保存的下载信息(文件指针位置) &;$uU private void read_nPos() 2U./
Yfk\ { =zn'0g,J4 try{ dy6zrgxygP DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2?
E;(]dQ int nCount = input.readInt(); 1|sem(t nStartPos = new long[nCount]; VD.TosVeWo nEndPos = new long[nCount]; MXSD8]je for(int i=0;i<nStartPos.length;i++) g(&cq { H>+/k-n- nStartPos = input.readLong(); t=7Gfv nEndPos = input.readLong(); UuIjtqW }
9tpyrGv input.close(); ika*w } E]#;K-j catch(IOException e){e.printStackTrace ();} <J^5l0)q catch(Exception e){e.printStackTrace ();} \6
\bD< } L\4rvZa hrniZ^ [+WsVwyf? private void processErrorCode(int nErrorCode) mu
B Y { J^"_H:1[ System.err.println("Error Code : " + nErrorCode); *9n[#2sM< } C@-Hm 8>x5| R,T 0!f //停止文件下载 'ON/WKJr|W public void siteStop() le5@WG/x { URVW5c bStop = true; 5j`sJvq for(int i=0;i<nStartPos.length;i++) 8$-MUF, fileSplitterFetch.splitterStop(); 6Jgl"Jw8 j"jssbu} 0Px Hf* } JlSqTfA } yD<#Q\, //负责部分文件的抓取 \gP?uJ **FileSplitterFetch.java ,i*rHMe */ `)O9
'568 package NetFox; N~|f^#L q;AD#A|\ OG#^d5( import java.io.*; Y's=31G@ import java.net.*; }P2*MrkcHB 0-p^ oA Ow-ejo public class FileSplitterFetch extends Thread { ;*5z&1O Dml?.-Uv< 9?Bh8%$ String sURL; //File URL hEjvtfM9\- long nStartPos; //File Snippet Start Position "0!#De
long nEndPos; //File Snippet End Position 6ud?US( int nThreadID; //Thread's ID D?ic~-& boolean bDownOver = false; //Downing is over z\v boolean bStop = false; //Stop identical I6WHC* FileAccessI fileAccessI = null; //File Access interface ;FlDRDZ% @IL@|Srs8 y6am(ugE public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Q8HNST($? { 0^{Tq0Ri[ this.sURL = sURL; YEV;GFI1 this.nStartPos = nStart; f.ua,,P. this.nEndPos = nEnd; N_D=j6B nThreadID = id; T \34<+n1N fileAccessI = new FileAccessI(sName,nStartPos);//定位 d)48m}[: } 70avr)OM Cdl"TZ< jGLmgJG-P public void run() 6 w!qZ4$ { ="T}mc while(nStartPos < nEndPos && !bStop) -)J*(7F(6^ { tDAX
pi( `LFT"qnp Il/`#b@h try{ fCa
lR7! URL url = new URL(sURL); wOUCe#P|r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '!X`X= httpConnection.setRequestProperty("User-Agent","NetFox"); pz2E+o String sProperty = "bytes="+nStartPos+"-"; }Bh\N5G% httpConnection.setRequestProperty("RANGE",sProperty); '1!%yKc0 Utility.log(sProperty); S%p,.0_ ^p4`o> \R&ZWJKh InputStream input = httpConnection.getInputStream(); >CCy2W^W //logResponseHead(httpConnection); s,J\nbj0h f[zKA{R ,9|7{j|u byte[] b = new byte[1024]; v'L"sgW6I int nRead; d;%~\+)x4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (|W6p%( { lS;S:-
-F nStartPos += fileAccessI.write(b,0,nRead); \U]<HEc^ //if(nThreadID == 1) [HXd|,~_j- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); El`G<esX } S@\&^1;4Hv un6W|{4] ;|rFP Utility.log("Thread " + nThreadID + " is over!"); 6mZpyt bDownOver = true; 2QHu8mFU //nPos = fileAccessI.write (b,0,nRead); a"O9;&};& } g7%vI8Y)@ catch(Exception e){e.printStackTrace ();} _z^&zuO } ^CwS'/fdN } Z1H q+YK NXI <y-2ovw* //打印回应的头信息 yj,+7[) public void logResponseHead(HttpURLConnection con) v]drDVJ
{ yaj1nq!*" for(int i=1;;i++) w2"]%WS % { 7<Ut/1$MI String header=con.getHeaderFieldKey(i); |b
Z
58{} if(header!=null) H_JT"~_2 //responseHeaders.put(header,httpConnection.getHeaderField(header)); }L Brk0] Utility.log(header+" : "+con.getHeaderField(header)); -J!k|GK#MX else Iq;a!Lya- break; #$t93EI } ZCuh^ } ng2yZ @$ 78z/D|{" D//Ts`}+n public void splitterStop() My9fbT { q[Y*.%~ bStop = true; YWhS< }^ } 1p>&j%dk kJXy) @(st![i+ } Q!Dr3x Izfj
9h ? 53^1; /* AQBr{^inH| **FileAccess.java x JzO?a' *//文件访问(定位,写) . =A| package NetFox; ">I50#bT import java.io.*; () HIcu*i 4s&koH(x doe u` public class FileAccessI implements Serializable{ fl9J N'5!4JUI //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 M\9p-%"L RandomAccessFile oSavedFile; 0Ioa;XgOn long nPos; EJrQ9"x&n rFv=j:8 o2(*5*b!@e public FileAccessI() throws IOException @6DV?VL { -,xsUw4 this("",0); My>{;n=} } W^nG\"T^ == i?lbj 0SLn0vD! public FileAccessI(String sName,long nPos) throws IOException EEp,Z` { ~_L_un.R oSavedFile = new RandomAccessFile(sName,"rw"); G5 x%:,n this.nPos = nPos; b!|c:mE9| oSavedFile.seek(nPos); T*C]:=) } W[W}:@KZ t5za$kW'& 2}R)0][W public synchronized int write(byte[] b,int nStart,int nLen) ?Da!QH
>,] { 8BJ&"y8H int n = -1; 3m`y?Dd try{ r(qU~re'
oSavedFile.write(b,nStart,nLen); Pd<>E*>}c. n = nLen; {@[z-)N7\, } Z4Qq#iHZR catch(IOException e) X6@G)68 { Ik|nL#JH] e.printStackTrace (); ~lLIq!!\ } ugt|'i G_x<2E"d nz]+G2h return n; 6ax|EMw } X}3o oW/ #/;|` ) crhF9 !4 } F4Gv=q)Z '`Z5.<n7p {o[*S%Z" /* D@>^_cTO24 **SiteInfoBean.java `=3:*.T* */ 4jl-? package NetFox; Ik4U+'z6 &<sDbNS j!P]xl0vOZ public class SiteInfoBean { H6XlSj )W/mt[; V"@]PI pr private String sSiteURL; //Site's URL #4*~ 4/ private String sFilePath; //Saved File's Path vN%SN>=L< private String sFileName; //Saved File's Name (-(sBQ a+ private int nSplitter; //Count of Splited Downloading File #Hr>KQ5mJQ ZK@ENfG H?>R#Ds- public SiteInfoBean() !7-dqw%l {//nSplitter的缺省值为5 w+~s}ta2^ //default value of nSplitter is 5 %A dE5HI- this("","","",5); .pOTIRbA } _ZfJfd~ rBZ0(XSZQ FHS6Mk26 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) y
ZsC> { n_51-^*z sSiteURL= sURL; 64>o3Hb2 sFilePath = sPath; ]?`t
spm<t sFileName = sName; =q(;g]e this.nSplitter = nSpiltter; PI#xRKt Ln})\
UDK) xCMcS~
3/ } @4D$Xl t .&YD x ["\Y-6"l public String getSSiteURL() iii2nmiK { !;^sIoRPV return sSiteURL; I7hE(2!$ } n%]1p36 0BM3:]=wr )q\|f_ public void setSSiteURL(String value) TC4W7}} { Ii/#cdgF sSiteURL = value; ,tZWPF- } Uzb~L_\Rmt MGd 7Ont &C+pen)Z public String getSFilePath() nxP>IfSA { 9air"4 return sFilePath; wTGH5}QZ+ } mpBSd+;Z `2y2Bk brGUK PB public void setSFilePath(String value) ([='LyH];z { R;gN^Yjk: sFilePath = value; PG8|w[V1 " } I_IDrS)O Q&;dXE h 3eqnc),Z public String getSFileName() c@%:aiEl { X/fk&Cp return sFileName; F`;oe[wfk } t/\J ++Qg5FukR Cyg\FHs public void setSFileName(String value) WUSkN;idVG { MMglo3 sFileName = value; jiMI&cl } &
Me%ZM0 'Jww}^h1 e.%`
tK3J public int getNSplitter() K%ltB& { o[W7'1O return nSplitter; vd>X4e^j } /ov&h; 4~8++b1/; G/Nb@pAy[ public void setNSplitter(int nCount) pmR6(/B# { rYbb&z!u nSplitter = nCount; L\--h`~YU } p=vu<xXtD } FWv-_ )>$@cH <o8j+G)K# /* ^b=9{.5 **Utility.java ^~k2(DLk */ @bQf =N+ package NetFox; 1-4iy_d ,rT62w*e wiXdb[[# public class Utility { 8_6\>hW& e#MEDjm/)g lL.3$Rp; public Utility() {k=H5<FV { h=uwOi6} dHV3d'.P &R:$h*Wt| } y<bA Y_-[ 2yk32| //线程睡眠 6vySOVMj public static void sleep(int nSecond) :!a'N3o> { 8{aS$V" try{ I^*&u, Thread.sleep(nSecond); '`$z!rA } )#
le|Rf catch(Exception e) T2-n;8t { WV]%llj^ e.printStackTrace (); ]]~tFdh } E^z\b * } E_-3G<rt >h+[#3vD //日志 K]4XD1n7 public static void log(String sMsg) V3j1M?> { ns|)VX System.err.println(sMsg); )&R^J;W$M1 } CPssk,q~C \~|+*^e) qP6Yn JWl public static void log(int sMsg) q 65mR!) { "L'0" System.err.println(sMsg); ,f
..46G } &VG|*&M } 0Q^ -d+! YY~BNQn6d V7}5Zw1 /* 34ij5bko_) **TestMethod.java 3T)GUzt` */ +L(0R&C package NetFox; i;4|UeUl /[Oo*}Dc=F =WFn+#&^ public class TestMethod { 7?Vo([8 aChyl;#E !QK~l public TestMethod() h/u>F$}c { ///xx/weblogic60b2_win.exe d~B]s try{ u~MD?!LV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f>$Ld1 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N|cWTbi SiteFileFetch fileFetch = new SiteFileFetch(bean); >_3+s~ fileFetch.start(); 1<Fh
aK } hs'J'~a catch(Exception e){e.printStackTrace ();} wfr+- g wM~W ,})x1y } 2n}nRv/' 9GdQ$^m %YjZF[P public static void main(String[] args) cR.[4rG' { FwU*]wx|{ new TestMethod(); gY'w=(/` } VO"f=gFg } WR'm<u 点击下载更多相关资料
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