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/* bz.sWBugR **SiteFileFetch.java @FF80U4' */ Lcf?VV} package NetFox; U2CC#,b!( import java.io.*; 8fktk?| import java.net.*; q/ (h{cq Y*IKPnPot2 ~y"OyO i& public class SiteFileFetch extends Thread { 'S*]JZ1 BCtKxtbS f?>
?jf SiteInfoBean siteInfoBean = null; //文件信息Bean &.qLE long[] nStartPos; //开始位置 P)LOAe1' long[] nEndPos; //结束位置 oTrit_@3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 mP's4 long nFileLength; //文件长度 &h_Y?5k K boolean bFirst = true; //是否第一次取文件 t+\<i8 boolean bStop = false; //停止标志 }pGjc_:'] File tmpFile; //文件下载的临时信息 >pe!T
aBN DataOutputStream output; //输出到文件的输出流 ;#mm_*L%@ AGKT* l.- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) g:@4/+TSt public SiteFileFetch(SiteInfoBean bean) throws IOException F>GPi!O { [f}`reRlZ siteInfoBean = bean; 5.D0 1?k //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Pq@-`sw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); sL;;'S& if(tmpFile.exists ()) <[ u(il { GVfRy@7n bFirst = false; ddd2w read_nPos(); VTY # { } 1.TIUH1 else &Pc.[k { /1$u|Gs
* nStartPos = new long[bean.getNSplitter()]; Yq4nmr4 nEndPos = new long[bean.getNSplitter()]; cI/}rZ+ } b"nkF\P@Fj J _q p<?lF a*iKpr- : } OR37 J:O&2g"g
l/"!}wF public void run() &N]e pV> { %~kE,^ //获得文件长度 P1Eg%Y6 //分割文件 {u-J?(s} //实例FileSplitterFetch _dW#[TCF //启动FileSplitterFetch线程 #{#k;va //等待子线程返回 y&bZai8WlE try{ e+:X%a4\ if(bFirst) _~*j=XR s { v#`> nFileLength = getFileSize(); %9J:TH9E) if(nFileLength == -1) |_QpB?b { 5NhAb$q2Y System.err.println("File Length is not known!"); qq3/K9 #y } W39J)~D^@ else if(nFileLength == -2) 6q!Q([D_ { R%q:]. System.err.println("File is not access!"); salDGsW^ } AEDBr < else 6y57m;JW/ { UZmo?&y for(int i=0;i<nStartPos.length;i++) d|)ARRW { }RKsS3} nStartPos = (long)(i*(nFileLength/nStartPos.length));
n_k`L(8* } A (p^Q for(int i=0;i<nEndPos.length-1;i++) OW@"j;6
3` { :$gs7<z{rm nEndPos = nStartPos[i+1]; p=#/H,2 } E9Dy)f]#W nEndPos[nEndPos.length-1] = nFileLength; E7hs+Mh } wy{sS} } :ln?PT
R3.w")6 ]6s/y //启动子线程 :SWrx MT fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
HKJ^6|' for(int i=0;i<nStartPos.length;i++) l*huKSX} { NU+PG`Vb fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y>#kT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), X.FoX nStartPos,nEndPos,i); ~4O3~Y_+GN Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _HjB'XNr( fileSplitterFetch.start(); SuNc&e#( } _MuzD&^qE // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uXvE>VpJG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ksOc,4A // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R y(<6u0 nEndPos = " + nFileLength); B&<5VjZ\ // fileSplitterFetch[nPos.length-1].start(); m1X*I >[wB|V5 lj:.}+]r //等待子线程结束 w=: c7Y+ //int count = 0; cIC/3g}] //是否结束while循环 {'B(S/Z7 boolean breakWhile = false;
5e1oxSU Gpcordt/ '.8eLN while(!bStop) 1?3+> { (w\|yPBB write_nPos(); VS_\bIC Utility.sleep(500); q?)5yukeF breakWhile = true; [O|c3; Qh6vH9(D 3)9e-@ for(int i=0;i<nStartPos.length;i++) !'IZr{Y> { Da!vGr if(!fileSplitterFetch.bDownOver) qs= i+ { "u&7Y:)^wr breakWhile = false; v6| [p break; Z_<NUPE } RlU ?F
} R>1oF]w if(breakWhile) `ZO5-E break; i,%N# Pgq(yPC vpOGyvI //count++; ^k{/Yl //if(count>4) g>eWX*Pa| // siteStop(); m=/HUt3(&0 } p_e x (n_.bSI $uUyp8F System.err.println("文件下载结束!"); }H
saJ=1U } RBg2iG$8| catch(Exception e){e.printStackTrace ();} 4>H0a } U3v~R4 =CS$c? *f{4_ts //获得文件长度 [D(JEO@ : public long getFileSize() V$;`#J$\b { gp~-n7'~O int nFileLength = -1; O U9{Y9e try{ | z_av URL url = new URL(siteInfoBean.getSSiteURL()); Ol<LL#<j4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9&<c)sS&B httpConnection.setRequestProperty("User-Agent","NetFox"); YcR: _ac nw_|W)JVQ $Fy~xMA8O int responseCode=httpConnection.getResponseCode(); 2`ERrh^i" if(responseCode>=400) Z![#Uz.z { aHI~@ processErrorCode(responseCode); \$t{K return -2; //-2 represent access is error 3[l\l5'm8 } ";jAH GbO v&%W*M0q@ xdY'i0fh String sHeader; -;RAW1]}Y$ TaKHr$h .L^;aL for(int i=1;;i++) ^h#A7 g { +iQ~ Y2Gh //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &hi][Pt //Utility.log(in.readLine()); IM[=]j.? sHeader=httpConnection.getHeaderFieldKey(i); pCa~:q*85 if(sHeader!=null) rq1~%S { K:Z,4Y if(sHeader.equals("Content-Length")) A)d0Z6G` { )=aqj@v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); */TO$ ^s break; C:bA:O } <S;YNHLC } LW("/ else kI5LG6 break; m}: X\G(6Q } d~QJ}a } IF//bgk- catch(IOException e){e.printStackTrace ();} -GQ.B{%G catch(Exception e){e.printStackTrace ();} 2(e;pM2Dq
=&qfmq 9c1q:>| Utility.log(nFileLength); {4p7r7n' $U. 2" YY'[PXP$Y return nFileLength;
YYkgm:[ } d)XT> & 7ruWmy;j
>Yv#t.! //保存下载信息(文件指针位置) c\tw#;\9 private void write_nPos() Ls.g\Gl3 { BCd0X. m( try{ I>-}ys`[ output = new DataOutputStream(new FileOutputStream(tmpFile)); *]k E3 output.writeInt(nStartPos.length); a<+Rw{ for(int i=0;i<nStartPos.length;i++) ,p\*cHB9 { AP=SCq; // output.writeLong(nPos); cmaha%3d output.writeLong(fileSplitterFetch.nStartPos); qPhVc9D# output.writeLong(fileSplitterFetch.nEndPos); K+yi_n L } p{SIGpbR& output.close(); Esg: } T).}~i;! catch(IOException e){e.printStackTrace ();} {c&9}u$e catch(Exception e){e.printStackTrace ();} P5"B7>L: } "e29j'u!* OU mZ| 0{?%"t\/f //读取保存的下载信息(文件指针位置) +OB&PE private void read_nPos() [!ZYtp?Hf { L9whgXD try{ 8-K4*(-dL DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Xa&:Hg< int nCount = input.readInt(); AJzm/,H nStartPos = new long[nCount]; lWf(!=0m nEndPos = new long[nCount]; ?:zMrlX for(int i=0;i<nStartPos.length;i++) /T6Te<68^ { 'XSHl?+q nStartPos = input.readLong(); )oS~ish nEndPos = input.readLong(); d{C8}U } U2JxzHXZ input.close(); mj9]M?] } X<1ymb3 catch(IOException e){e.printStackTrace ();} \D[~54 catch(Exception e){e.printStackTrace ();} L;KLmxy# } 9@*4^Ks p #e9XU:9@g 1;>RK private void processErrorCode(int nErrorCode) xlW>3'uHfa { Me;Nn$'% System.err.println("Error Code : " + nErrorCode); H"2,Q
T } HI)U6.' i l%9j _b=})** //停止文件下载 o%Qn%gaX public void siteStop() wo^1%:@/2 { ^$lsmF]^ bStop = true; o`}8ZtD for(int i=0;i<nStartPos.length;i++) 2TaHWw<A fileSplitterFetch.splitterStop(); hrOp9|!m [|HQfTp$ %';DBozZ } hDEZq>& } ]08~bL1Q //负责部分文件的抓取 "xD5>(|^+Q **FileSplitterFetch.java r1$x}I#Zv */ ?
5hwz package NetFox; "n<u(m8E +,9Muf h '9|R7 import java.io.*; ^}GR!990 import java.net.*; H329P*P yhyh\. [3W+h1 public class FileSplitterFetch extends Thread { uRw%`J4H Fd9Z7C 7|?Ht] String sURL; //File URL jH4Wu`r;m long nStartPos; //File Snippet Start Position 9p"';*{= long nEndPos; //File Snippet End Position m$q* int nThreadID; //Thread's ID u #7AB>wi{ boolean bDownOver = false; //Downing is over /B boolean bStop = false; //Stop identical jbTyM"Y FileAccessI fileAccessI = null; //File Access interface j !`2Z@ zU};|Zw V0:db public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException VU|Cct&) { I~c}&'V this.sURL = sURL; e?-LB this.nStartPos = nStart; G@S'_ this.nEndPos = nEnd; 11yS2D
nThreadID = id; u+8?'ZT, fileAccessI = new FileAccessI(sName,nStartPos);//定位 2l4`h)_q } *K w/ilI k:zGv +;;pM[U public void run() m^,3jssdA { HM\gOz while(nStartPos < nEndPos && !bStop) %w6lNl { e9?y0vT// rHgrCMW T}A{Xu*:+H try{ o/\z4Ri)$ URL url = new URL(sURL); h$fC/Juit HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,Onu% httpConnection.setRequestProperty("User-Agent","NetFox"); F?TmOa0 String sProperty = "bytes="+nStartPos+"-"; 6~q"#94 httpConnection.setRequestProperty("RANGE",sProperty); 2VS#=i(B^ Utility.log(sProperty); /ec~^S8X rkWW)h(e k\M">K0E InputStream input = httpConnection.getInputStream(); BH=CoD. //logResponseHead(httpConnection); z3-AYQ.H u\G\KASUK% Jz\'%O' byte[] b = new byte[1024]; NW;wy;; int nRead; w2`j&]D6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) aw/5#(1R { n
6|\ nStartPos += fileAccessI.write(b,0,nRead); R2[!h1nZ //if(nThreadID == 1) zX/9^+p: // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3836Di:{ } Cqk6I gw t \C[mw L"!BN/i_ Utility.log("Thread " + nThreadID + " is over!"); yh Ymbu bDownOver = true; gG=E2+=uy //nPos = fileAccessI.write (b,0,nRead); bDPT1A`F } _Msaub!N catch(Exception e){e.printStackTrace ();} \Tj(] } Z@`HFZJ } E^.
=^bR m,]M_y\u _&m //打印回应的头信息 K&noA public void logResponseHead(HttpURLConnection con) b}r3x&) { ~UJ_Rr54 for(int i=1;;i++) KcjP39@I { I*K~GXWs# String header=con.getHeaderFieldKey(i); DavG=kvd if(header!=null) th*E"@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); JEes'H}Y Utility.log(header+" : "+con.getHeaderField(header)); z '%Vy else ?5 d3k% break; 5 ERycC y } SLc'1{ } 07+Qai-] <kmn3w,vi w~g)Dz2G public void splitterStop() `4 A%BKYB { KmkPq] bStop = true; ),)]gw71QW } [e'Ts#($A f/qG:yTV` Sf\mg4, } oa|nQ`[ fhmqO0 fm\IQqIK% /* pJ5Sxgv{; **FileAccess.java &u_f:Pog *//文件访问(定位,写) 6]^}GyM! package NetFox; l8hOr yB& import java.io.*; [?hc.COE o3l_&?^ 6F3#Rxh public class FileAccessI implements Serializable{ !}^{W)h[ ?J~(qa a; //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7m=tu?@ RandomAccessFile oSavedFile; puz~Rfn#* long nPos; Y m|zM1qc >%.6n:\rG PQ|kE`' public FileAccessI() throws IOException
}ya9 +?I { pRj1b^F5y this("",0); D[)g-_3f6< } Dw^d!%Ala ]|[oL6" ;Z"6ve4 public FileAccessI(String sName,long nPos) throws IOException ]J C}il_b { T0Q)}%L oSavedFile = new RandomAccessFile(sName,"rw"); yA!#>u%g this.nPos = nPos; |,Y(YSg. oSavedFile.seek(nPos); A@EeX4N } a<M<) {$u :d-+Z%Y Nd*zSsVlq public synchronized int write(byte[] b,int nStart,int nLen) N$H0o+9-Y { AjK'P<:/ int n = -1; g#1_`gK try{ Jn.WbS oSavedFile.write(b,nStart,nLen); g~Zel}h# n = nLen; ,\f!e#d } ^~2GhveBV catch(IOException e) 0t1WvW { )sVz;rF< e.printStackTrace (); 5/Q^p" } <ok/2v ,&!Txyye n9Z|69W6> return n; ZO+c-!%[( } &gZ5dTj> jYRwtP\ #!KbqRt } .Kr?vD^nG v*1UNXU\ >9(lFh0P /* [C)-=.Xx)j **SiteInfoBean.java Be+vC=\K */ d:6?miMH]t package NetFox; g#;w)- Zj l-"$a8jn2 <Vr" public class SiteInfoBean { h\b]>q@ VAF+\Cea= t7("geN] private String sSiteURL; //Site's URL DQd~!21\| private String sFilePath; //Saved File's Path HKCMKHR private String sFileName; //Saved File's Name BM#cosV7%h private int nSplitter; //Count of Splited Downloading File "8aw=3A iNgHx[*? XS]=sfN public SiteInfoBean() M&
GA:` {//nSplitter的缺省值为5 cTFyF) //default value of nSplitter is 5 rE-Xv.
| this("","","",5); CEE`nn } ;Id%{1 6)kF!/J b/ h,qv public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %<JjftNQ { P7(+{d{ sSiteURL= sURL; JGp~A#H& sFilePath = sPath; &+=A;Y) sFileName = sName; EUU9JnQhBJ this.nSplitter = nSpiltter; C+$dm)M/q iK1<4) 1K&z64Q5J } [J0L7p*6 Y!v `0z tB4- of3+ public String getSSiteURL() a5:Q%F<! {
%lAJ]$m return sSiteURL; ? r=cLC } )R+@vh#Q<$ W\o(f W
eP$0TDZ public void setSSiteURL(String value) xXM`f0s@+] { agN`)
F! sSiteURL = value; )Fk%,H-1 } {=j!2v#8~ a0Cf.[L .G#S*L public String getSFilePath() iV[g.sP- { s(J,TS#I] return sFilePath; B0NKav } #Na3eHT tWD~|<\. ) d>}pz public void setSFilePath(String value) W`K XO|'p@ { xxgS!J sFilePath = value; f2B?Zn } G*ZHLLO4S\ J{Ei+@^/9 :bFmw dX public String getSFileName() abUvU26t { )V%xbDd S return sFileName; (Sr&Y1D } +.whEw(i =xWZJ:UnU \zw0*;&U public void setSFileName(String value) {3]g3mj { hWwh`Vw% sFileName = value; 1+v&SU } *<#jr 4:=']C h}i
/u public int getNSplitter() Pfu2=2Ra { }x`W+r return nSplitter; K?,eIZ{.S } \@vR*E ")"VQ|$y 2@@OjeANsX public void setNSplitter(int nCount) LX'.up11X5 { kMAQHpDD nSplitter = nCount; rY_)N^B|nF } O E0w/{ } T>e!DOW; =0TnH<` mS5'q q;t /* '+N!3r{G **Utility.java 1w/1k6`0 */ }$s#H{T! package NetFox; \dTX%<5D @*e|{;X]hy S)of.Nq.; public class Utility { 3t5`,R1@t k{(R.gLZG Lz's!b public Utility() $As;Tvw. { I?LJXo \O eTemRNz X:bv
?o>Y } 7T9m@ hJ\IE?+ //线程睡眠 a7s+l= public static void sleep(int nSecond) :0x,%V74_! { 'd 4I/ try{ x.CUJ^_. Thread.sleep(nSecond); D*BZp0x } >UvLeS2h:y catch(Exception e) \B) a57 { _^;+_6&[ e.printStackTrace (); YyEW}2 } PnkJWl<S } EITA[Ba B` ivDmPHj{ //日志 ^F2OTz4n public static void log(String sMsg) a3D''Ra { JoeU J3N System.err.println(sMsg); @zo}#.g } 07 [%RG 1.*VliY Agt6G\n public static void log(int sMsg) zmd,uhNc: { gv)F`uRWA System.err.println(sMsg); z-};.!L^ } h!.#r*vV } !wP|t#Sc9 P7ktr?V0a
QcQQQM /* ,{DZvif
**TestMethod.java ETU.v*HT] */ {p3VHd# package NetFox; W *?mc2;/ Tj5G
/H> JHQc)@E} public class TestMethod { =P'33)
\ ) Sc!]M 5 ]gHxvT\E public TestMethod() K5l#dl_T { ///xx/weblogic60b2_win.exe .G-F5`2I try{ PL vz1}ts SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); FyD^\6/x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }#0MJ6L SiteFileFetch fileFetch = new SiteFileFetch(bean); 4HXqRFUD fileFetch.start(); |]=. ^ } i
T* !3 catch(Exception e){e.printStackTrace ();} ]j.=zQP?' Xc)V;1 %f??O|O3 } h M{&if ~{69&T}9 Arvxl(R\4 public static void main(String[] args) 5WhR| { : (IPrQ new TestMethod(); BC!n;IAe } MV8Lk/zd?A } WH:[Y7D 点击下载更多相关资料
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