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/* wSjy31 **SiteFileFetch.java u&p8S#e */ ^I/(9KP# package NetFox; -rsS_[$2 import java.io.*; ^Whc<>| import java.net.*; jEKa9rt 0(&uH0x 9I 6^-m@: public class SiteFileFetch extends Thread { "^t7]=q _x5-!gK
2^s@n3t SiteInfoBean siteInfoBean = null; //文件信息Bean qb nlD\ long[] nStartPos; //开始位置 S?t
`/"O long[] nEndPos; //结束位置 vasw@Uto) FileSplitterFetch[] fileSplitterFetch; //子线程对象 TJ>YJD long nFileLength; //文件长度 kk126?V]_ boolean bFirst = true; //是否第一次取文件 e77s?WxbK boolean bStop = false; //停止标志 W9cvxsox File tmpFile; //文件下载的临时信息 H?opG<R=ek DataOutputStream output; //输出到文件的输出流 fx 0 8>r
L,_U co //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I-.?qcy~ public SiteFileFetch(SiteInfoBean bean) throws IOException *QW.#y>"j { 9^SrOW6~ siteInfoBean = bean; ,S(_YS^m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); w}}+8mk[ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Wm8BhO if(tmpFile.exists ()) MS SHMR { Qvny$sr2 bFirst = false; <\:*cET3 read_nPos(); ve#[LBOC8 } dd=5`Bo9Yh else rGH7S!\AM { 3I?yRE nStartPos = new long[bean.getNSplitter()]; 0wBr_b! nEndPos = new long[bean.getNSplitter()]; ;Xidv9c } JmF`5 J!rZskd @TKQ_7BcB 7({.kD6 } =L$RY2S" "z.!h(Eq 7.5\LTM>9e public void run() 17Q*
<iCs { W6B o\UK //获得文件长度 !/&~Feb //分割文件 #l2WRw_t //实例FileSplitterFetch bVRxGn @l //启动FileSplitterFetch线程 ,v| vgt //等待子线程返回 [-[|4|CnOm try{ YS"76FJ if(bFirst) /?j^Qu { $AFiPH9 nFileLength = getFileSize(); e ]>{?Z if(nFileLength == -1) RmN\;G?} { "2"*3R<Y System.err.println("File Length is not known!"); )fZ5.W8UE] } G`!;RX else if(nFileLength == -2) A&'HlI%J { F0NNS!WP7^ System.err.println("File is not access!"); DA4!-\bt@ } `~t$k7wm= else Pb D|7IM { CQY/q@7 for(int i=0;i<nStartPos.length;i++) a-TsD}'X { zGFW?|o< nStartPos = (long)(i*(nFileLength/nStartPos.length)); [TV"mA } 8<^6<c for(int i=0;i<nEndPos.length-1;i++) ^_Z Qf { :kI
x?cc nEndPos = nStartPos[i+1]; .uagD[${ } }Lwj~{ nEndPos[nEndPos.length-1] = nFileLength; **YNR:#Y } 48%a${Nvvj } Ah2XwFg? T{K+1SPy4 o:Z*F0qm //启动子线程 +FVcrL@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; l:+pO{7L for(int i=0;i<nStartPos.length;i++) <Q-ufF85) { Mz{ Rh+gS fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !"J* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tbv6-)Hs nStartPos,nEndPos,i); g?o$:>c Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /[#{#:lo2 fileSplitterFetch.start(); L@R%*-a } I0jEhg%JZ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Iei4yDv ; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); LRd,7P // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", XWy
iS\ nEndPos = " + nFileLength); v:T` D // fileSplitterFetch[nPos.length-1].start(); 8UL:C?eY .}y
Lz #WpO9[b> //等待子线程结束 A8eli=W //int count = 0; t@19a6:Co //是否结束while循环 nt[0krG boolean breakWhile = false; .r*b+rc;] U ._1'pW s9GPDfZ
while(!bStop) TAC\2*bWje { @%cJjZ5y write_nPos(); "RX?"pB Utility.sleep(500); {}^ELw breakWhile = true; LA@}{hU x}>tX hJ4.: for(int i=0;i<nStartPos.length;i++) <,hBoHZSL { ze\~-0ks+ if(!fileSplitterFetch.bDownOver) IKr7"` { !<6wrOMa O breakWhile = false; z=Vvb break; FW.dHvNX } 22r01qH } O}f(h5!k if(breakWhile) a!^wc, break; A07P$3>/W G =4 y!y B# H //count++; w+$gY?% //if(count>4) q(p0#Mk,E // siteStop(); |uZ=S]V@ } tr/dd&(Y1 J+|ohA q@-qA] System.err.println("文件下载结束!"); @>:07]Dxo } QF;<%QF: catch(Exception e){e.printStackTrace ();} NU(/Yit } h{xERIV1u ?-84_i XP^6*}H.* //获得文件长度 yK7>^p}V public long getFileSize() E 6@;e-]j { 2M#CJ& int nFileLength = -1; )|a9Z~#x try{ +r!h* 4 URL url = new URL(siteInfoBean.getSSiteURL()); bv4cw#5z$9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $B?7u@>, httpConnection.setRequestProperty("User-Agent","NetFox"); r=Q5=(hn C|J1x4sb@ `j<tI6[e int responseCode=httpConnection.getResponseCode(); .>'Z9.Xnk if(responseCode>=400) yrs3`/ { G0Eq}MyF processErrorCode(responseCode); /_a *C.a6 return -2; //-2 represent access is error ;MJ1Q } FOA%(5$4 5l}h8So4 dR+$7N$ String sHeader; R,bcE4WR" Q8q_w2s, [E~TYk; for(int i=1;;i++) 7dJaWD:& { Xt84 Evo //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ) :@%xoF5 //Utility.log(in.readLine()); (Qm;]?/ sHeader=httpConnection.getHeaderFieldKey(i); /6c10}f if(sHeader!=null) 3Q}Y?rkJ5 { %p60pn[( if(sHeader.equals("Content-Length")) pb
Ie)nK { 2AW{qwk7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (d#Z-w- break; ZRm\d3x4 } w0Y%}7 } [;AcV73 else UYOn
p7R< break; 2oG|l!C } hob$eWgr } @EZONKT catch(IOException e){e.printStackTrace ();} ^b %8_?2m catch(Exception e){e.printStackTrace ();} W@dY:N}
]:fCyIE ,P@-DDJ Utility.log(nFileLength); 30E v" HjS^
nYl X2YOD2<v return nFileLength; ug"<\" } SqF.DB~ W?
||9 m@u`$rOh //保存下载信息(文件指针位置) UiZp-Y%ki private void write_nPos() arKmc@"X { y?#J`o-
O try{ _lv:"/3R output = new DataOutputStream(new FileOutputStream(tmpFile)); yKEFne8^ output.writeInt(nStartPos.length); DF|s,J`98 for(int i=0;i<nStartPos.length;i++) L_K\i? { S!W/K!wf
// output.writeLong(nPos); /.YAFH|i)" output.writeLong(fileSplitterFetch.nStartPos); ]=VS~azZ5 output.writeLong(fileSplitterFetch.nEndPos); ?lN8~Ze } kseJm+Hc output.close(); S} Cp&}G{P } 2U`W[ catch(IOException e){e.printStackTrace ();}
9XqAjez\ catch(Exception e){e.printStackTrace ();} 0(/D| } etMh=/NFV Guw|00w,Q$ bH&)rn //读取保存的下载信息(文件指针位置) EQ63VF private void read_nPos() cgxFEv { (2bZ] try{ f
H|QAMfOu DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~gWd63%8x int nCount = input.readInt(); L\wpS1L( nStartPos = new long[nCount]; h`h>H
X nEndPos = new long[nCount]; :@%-f:iDj for(int i=0;i<nStartPos.length;i++) oA;Ty7s { I,4- nStartPos = input.readLong(); j-`X_8W nEndPos = input.readLong(); ,' rL'Ys } b}Hl$V(uD input.close();
-N7L#a } v<3o[m q catch(IOException e){e.printStackTrace ();} ;[KriW catch(Exception e){e.printStackTrace ();} ]ZKt1@4AY }
n~)HfY }{wTlR.] "4ozlWx private void processErrorCode(int nErrorCode) 2iPmCG { 0YpiHoM System.err.println("Error Code : " + nErrorCode); S`@6c$y k } IFrb}yH 3_\{[_W Vvyrty //停止文件下载 1KYbL8c public void siteStop() ?l,
X!o6 { )0U3w#,JQ bStop = true; }>;ht5/i/ for(int i=0;i<nStartPos.length;i++) ?#* fileSplitterFetch.splitterStop(); HLSfoQ&)v 3cCK"kr 9jMC|oE } B]|6`UfB } 2&gd"Ak( //负责部分文件的抓取 j(%gMVu **FileSplitterFetch.java Cv>yAt.3 */ XatA8(_,5 package NetFox; ke}Y2sB h
eE'S/ 3"'# |6O9 import java.io.*; fwi};)K import java.net.*; Ns.3s7& [arTx^ ){+[$@9 public class FileSplitterFetch extends Thread { a1g6}ym\
m%oGzx+ &\1'1`N1 String sURL; //File URL kRN|TDx( long nStartPos; //File Snippet Start Position R%b*EBZ long nEndPos; //File Snippet End Position ).NcLJw_ int nThreadID; //Thread's ID 8ji^d1G, boolean bDownOver = false; //Downing is over
w.J%qWJq boolean bStop = false; //Stop identical Xr?>uqY!M FileAccessI fileAccessI = null; //File Access interface Qj
6gg cxXbo a Pqy-gWOv public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1z~k1usRK { }rzdm9 this.sURL = sURL; Kajkw>z this.nStartPos = nStart; ~@T+mHny this.nEndPos = nEnd; 5-8]N>/b! nThreadID = id; ^uyN v-'F fileAccessI = new FileAccessI(sName,nStartPos);//定位 6P;o 6s } brg":V1a eM?rc55| n$.1Wk" public void run() 5%<TF.;-J { \f(Y:}9 while(nStartPos < nEndPos && !bStop) |x &Z~y { uu}a:qrY |EF>Y9
O6yP
qG *j try{ )K{o<m~WAo URL url = new URL(sURL); 2Sge HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); IWAj Mwo httpConnection.setRequestProperty("User-Agent","NetFox"); DVObrL)znL String sProperty = "bytes="+nStartPos+"-"; q}>M& * httpConnection.setRequestProperty("RANGE",sProperty); "@.Z#d|Y Utility.log(sProperty); c}\
'x5:o d,)}+G fO*)LPen.z InputStream input = httpConnection.getInputStream(); B ,V(LTE //logResponseHead(httpConnection); qh%i5Mu gf+o1\5t@ A&N$tH byte[] b = new byte[1024]; :I2H&,JT int nRead; $zdd=.!KiK while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 49o\^<4b { Iq+2mQi*/k nStartPos += fileAccessI.write(b,0,nRead); F
y b[{" //if(nThreadID == 1) M9gOoYf,~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9*' &5F= } Truc[A.2Z W:WQaF`2x Tj=gRQ2v Utility.log("Thread " + nThreadID + " is over!"); JlUb0{8PE bDownOver = true; Qe_+r(3)k //nPos = fileAccessI.write (b,0,nRead); WhH!U0 } ThtMRB)9 catch(Exception e){e.printStackTrace ();} gt'*B5F( } iecWa:(' } 22z1g(;@ G%;kGi`m Y.7} //打印回应的头信息 Hoj8okP public void logResponseHead(HttpURLConnection con) 975
_d_U { avg4K*v v for(int i=1;;i++) )#a7'Ba { R }1W String header=con.getHeaderFieldKey(i); NddO*`8+) if(header!=null) *#zS^b n //responseHeaders.put(header,httpConnection.getHeaderField(header)); RB[/q: Utility.log(header+" : "+con.getHeaderField(header)); u\f3qc,]F else SnW7 x break;
f~q4{ } z?4=h Sy } "CBRPp b:1 L@8s; +Juh:1H public void splitterStop() <6/= y1QC) { grspt} bStop = true; eQ;Q4 } \%TyrY+`K z6I% wh Z5$fE7ba+ } nM8[ !>3LGu, >g]ON9CGH /* w^Ag]HZN **FileAccess.java O[FZq47 *//文件访问(定位,写) V&%C\ns4 package NetFox; dw9T f ^V import java.io.*; 5$%XvM
m*dNrG [1SMg$@< public class FileAccessI implements Serializable{ 9 I{/zKq 35_)3R) //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8vSIf+ RandomAccessFile oSavedFile; aClA{ long nPos; moZm0`WR OhFW*v E7`qmn public FileAccessI() throws IOException T<yb#ak { %j5ywr: this("",0); Z!_n_Fk } :$%>4+l 2+Yb
7 uI, t7*#[x)a public FileAccessI(String sName,long nPos) throws IOException ]C!?HQ{bsf { ]iVLHVqz oSavedFile = new RandomAccessFile(sName,"rw"); pO]8
dE0 this.nPos = nPos; J#
EP% oSavedFile.seek(nPos); rt}^4IqL } (>7>3 UQPU"F7. :kG)sw7 public synchronized int write(byte[] b,int nStart,int nLen) ue\t ,*KYd { !0"nx{7. int n = -1; =J/ FJb try{ >2lwWXA oSavedFile.write(b,nStart,nLen); Vte EDL/w n = nLen; >cgpaj x* } b1-&v|L catch(IOException e) GLUUY0 { 3CZS) e.printStackTrace (); ,;jGJr } *C2R`gpBI L0"~[zB]N G%{0i20_ return n; N+g@8Q2s;5 } :L:&t,X PJ\0JR7a <]d
LX}C) } ]?K.
S6 Tv$sqVe9 L:R<e#kgS /* ^3~e/P KM **SiteInfoBean.java | C+o; */ FHg0E++? package NetFox; Nneo{j 5?u}#zO :dnJY%/q public class SiteInfoBean { 'i|rjW( Qa4MZj;$K +%0z`E\?M# private String sSiteURL; //Site's URL qJv[MBjk3B private String sFilePath; //Saved File's Path 8%:]W^ private String sFileName; //Saved File's Name 'Jj=RAV` private int nSplitter; //Count of Splited Downloading File X#p Wyo~ A9:NKY{z P'$ `'J]j public SiteInfoBean() i$^ZTb^ {//nSplitter的缺省值为5 n/Dp"4H%q //default value of nSplitter is 5 !0}\&<8/m this("","","",5); /X*oS&-M } sen=0SB/ A\sI<WrH 4P8*k[. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Jjm|9|C, { K[?Xm"4 sSiteURL= sURL; n1v5Q2xw sFilePath = sPath; N{Qxq>6 G sFileName = sName; ,xsH|xW this.nSplitter = nSpiltter; nE W31 8 sRhKlUJG 9Kv|>#zff } >Aq:K^D/3F n.}T1q|l +[-i%b3q public String getSSiteURL() ROb\Rxm { #f,y&\Xmf return sSiteURL; \2v"YVWw
} nv/[I,nw 7/IlL 3iNkoBCg public void setSSiteURL(String value) $lwz-^1t. { )%Iv[TB[ sSiteURL = value; YwDt.6(+, } ^QXbJJ A#y@`}]!' r ,(Mu public String getSFilePath() 8p^B hd { H`QQG! return sFilePath; D-p.kA3MJ } 5Rv+zQ#GR N"7]R[* t0E 51Ic@ public void setSFilePath(String value) 0\QR!*'$ { nms8@[4- sFilePath = value; QG
gF|c7 } A;X=bj _&a 45 >XKr.% chI.{Rj public String getSFileName() PL=^}{r { @C8DZ5) return sFileName; HL K@xKD< } _8?o'<!8?^ =r.
>N\ /F/;G*n public void setSFileName(String value) S~OhtHwK {
%yS3&Ju sFileName = value; 3251Vq % } 1R%1h9I4' ro~+j}* y'C-[nk public int getNSplitter() Tny>D0Z# { Z}6^ve return nSplitter; =6nD sibf } 5jcte<
5I_ S=|@L<O Q /x8 #X public void setNSplitter(int nCount) ~aK?cP { qt e>r nSplitter = nCount; pW\'ZRj } )X+mV } [5d2D,) qCQ./"8 15\Ph[6g /* !
NV#U **Utility.java *?p|F&J */ z_|oCT!6 package NetFox; 5z$,6T kLSrj\6I[ ?)4?V\$ public class Utility { y(jg#7) ^ZRYRA cQNs L public Utility() ]2SI!Ai7 { I27,mS+] F=a+z/xKT &dB-r&4;+ } %q3$|> m:QG}{<.h //线程睡眠 B^ 7eo W public static void sleep(int nSecond) r),PtI0X { sN=6 gCau try{ >p\e0n Thread.sleep(nSecond); )(M7lq.e7 } &]6)LFm catch(Exception e) =qVP] 9 { ~#K@ADYr e.printStackTrace (); gk0.zz([ } tA.`k;LT } L71!J0@a# nSx8E7 |V //日志 (t^n'V public static void log(String sMsg) ~EiH-z4U { n||A" @b\ System.err.println(sMsg); ?i\;:<e4 } uYI@9U y^>Q/H\
,~PYt*X4 public static void log(int sMsg) 4<,|*hAT { Tb;d.^ System.err.println(sMsg); >pyj]y^3 } n
1b(\PA } Z3KO90O!8 ='?:z2lJ q6#<[ 4? /* R6;Phdh<> **TestMethod.java zk_Eb?mhwV */ :Sg&0Wj+#j package NetFox; .>g1$rj ,$*IzL~ )EM7,xMz public class TestMethod { +!t} }CL"S_>1 &jA\hg#9 public TestMethod() *hhmTc# { ///xx/weblogic60b2_win.exe /hW d/H] try{ !\ND( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); V)M1YZV{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); C2U~=q>> SiteFileFetch fileFetch = new SiteFileFetch(bean); rt-\g1x fileFetch.start(); &$FvWFRh# } nv0@xnbz catch(Exception e){e.printStackTrace ();} q(o/yx{bm 5FKBv
e@ YB))S!;Ok } ^WYQ]@rh3 QWnndI_4p R@Y=o].2 public static void main(String[] args) MZv]s { UM%o\BiO new TestMethod(); FjfN3#qlg } 9W7#u}Z } j|fd-<ng 点击下载更多相关资料
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