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/* W[trsFP1? **SiteFileFetch.java +"8 [E~Bih */ N$1ZA)M package NetFox; 8U,VpuQ: import java.io.*; E(J@A'cX import java.net.*; /.1c<! Dqss/vwV %@/"BF;r public class SiteFileFetch extends Thread { sywSvnPuYZ o+UCu`7e +O`3eP`u SiteInfoBean siteInfoBean = null; //文件信息Bean <a9<rF =r long[] nStartPos; //开始位置 +ZH-'l long[] nEndPos; //结束位置
4to)ff FileSplitterFetch[] fileSplitterFetch; //子线程对象 32yGIRV long nFileLength; //文件长度 &)UZ9r`z boolean bFirst = true; //是否第一次取文件 oNW.-gNT boolean bStop = false; //停止标志 y
%R-Oc File tmpFile; //文件下载的临时信息 O@*7O~eO DataOutputStream output; //输出到文件的输出流 vW`Dy8`06 "B18|#v //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3r{3HaN(^' public SiteFileFetch(SiteInfoBean bean) throws IOException RmF,x9 { L $R"?O7 siteInfoBean = bean; { +d](+$ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +NML>g#F~z tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ra87~kj< if(tmpFile.exists ()) 8 xfn$ { l&rS\TCkp bFirst = false; ITcgpK6k read_nPos(); t8vR9]n } L=`QF'Im else l%vX$Kw { Ir%L%MuR] nStartPos = new long[bean.getNSplitter()]; |'mwr! nEndPos = new long[bean.getNSplitter()]; ,4kly_$BH } MA}~bfB m|K"I3W$ B4tC3r F"p7&e\W|l } .3xpDVW^e &BF97%E2 M:: public void run() kV>[$6 { 6"3-8orj //获得文件长度 p~(+4uA //分割文件 'G] P09`*) //实例FileSplitterFetch NC]]`O2r@ //启动FileSplitterFetch线程 'gBns //等待子线程返回 %S$P<nKN5 try{ ?=
G+L0t
if(bFirst) WBb@\|V| { L7kNQ/ nFileLength = getFileSize(); a1^CpeG~ if(nFileLength == -1) h%4aL38 { zL8Z8eh"> System.err.println("File Length is not known!"); "LwLTPC2 } k2bjBAT else if(nFileLength == -2) O|Sbe%[*wW { r"E%U:y3P System.err.println("File is not access!"); ALcin))+B } \<e? else @;\2 PD { 2@TgeV0Y[ for(int i=0;i<nStartPos.length;i++) #}M\ J0QG { AN193o nStartPos = (long)(i*(nFileLength/nStartPos.length)); kSW=DE|#} } Lzr&Q(mL for(int i=0;i<nEndPos.length-1;i++) F~bDA~ { *R'r=C` nEndPos = nStartPos[i+1]; " V[=U13 } >(E C.ke nEndPos[nEndPos.length-1] = nFileLength; ?<F=*eS } 6XP>qI,AJ } "0*yD[2 !sknO53`H` e>$d*~mwn //启动子线程 ON(OYXj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Bb[WtT}= for(int i=0;i<nStartPos.length;i++) @euH[< { %fbV\@jDCX fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <K
g=?wb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <v=$A]K nStartPos,nEndPos,i); vl`Qz"Xy Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9f(0
qa fileSplitterFetch.start(); DB~3(r?K } .j
et0w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?xa70Pb{; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); rt rPRR\:" // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %>p[;>jW nEndPos = " + nFileLength); .2Q4EbM2 // fileSplitterFetch[nPos.length-1].start(); 8=K%7:b f 7R/i r|MBkpcvp //等待子线程结束 %fT%,(
w}t //int count = 0; -R]Iu\ //是否结束while循环 T\ *#9a boolean breakWhile = false;
A
".v+ @d&JtA kk`K)PESi while(!bStop) ^l:~r2 { <<=.;`(/v write_nPos(); 8AjQPDn+ Utility.sleep(500); ]KQv]' breakWhile = true; 9T\uOaC" n1!}d%: VGYx( for(int i=0;i<nStartPos.length;i++) 12i<b { %nS(>X<B if(!fileSplitterFetch.bDownOver) eS`ZC!W { elqm/u breakWhile = false; E"O6N.}. break; AZ9;6Df } z|F38(%JJN } > `1K0?_ if(breakWhile) v~*Co}0OB break; ~xa yGk 70GwTK.{~ =.`:jZG //count++; U#iGR5&^3 //if(count>4) &ir|2"HV // siteStop(); sSLVR^ } P5JE = &M _4f=\ bMA0#e2 System.err.println("文件下载结束!"); b FMBIA| } <e?1&5 6 catch(Exception e){e.printStackTrace ();} 4<j7F4 } *V`E)maU erQQ_ M=M~M$K //获得文件长度 zv-9z public long getFileSize() R?3N><oh* { 4C#r=Uw` int nFileLength = -1; eP|_ try{ pJ3-f k"i URL url = new URL(siteInfoBean.getSSiteURL()); w61*jnvi@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); WK.K-bd httpConnection.setRequestProperty("User-Agent","NetFox"); 2@6Qifxd@ Ueu~803~ N79?s)l:K int responseCode=httpConnection.getResponseCode(); 3Q#Tut if(responseCode>=400) h+c9FN { i*]$_\yl" processErrorCode(responseCode); z',f'3+ return -2; //-2 represent access is error xrZzfg } M?d (-en Ihd{tmr< o(gV;>I String sHeader; Gc=uKQ+\V o?g9Grk y&W3CW\: for(int i=1;;i++) xV0:K= { O@>ZYA% //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &R))c|>OT& //Utility.log(in.readLine()); ?{;7\1[4 sHeader=httpConnection.getHeaderFieldKey(i); IkuE | if(sHeader!=null) X%98k'h.y { ?orLc,pU^ if(sHeader.equals("Content-Length")) ^H!45ph?Jc { qoP/`Y6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); kXgc'w6EhF break; /,yRn31[ } w.(?O; } |\U 5m6 q else >|pN4FS break; a0jzt!ci } #Ibpf , } Gn %"B6 catch(IOException e){e.printStackTrace ();} Zg4kO;r08 catch(Exception e){e.printStackTrace ();} $!vK#8-&{ z?Cez*.h> [VE>{4]W Utility.log(nFileLength); T<%%f.x[s 7lx]`u> rh DiIO_ return nFileLength; 3Ct:AJeg } 6 u 1|pX8 G-TD9OgZ %l3f . //保存下载信息(文件指针位置) \iA.{,VX private void write_nPos() 9DmFa5E { gh-i|i, try{ F@b=S0}K output = new DataOutputStream(new FileOutputStream(tmpFile)); 1'%n?\OK66 output.writeInt(nStartPos.length); $T6+6<
for(int i=0;i<nStartPos.length;i++) )SHB1U25{ { A!v:W6yiz // output.writeLong(nPos); =u`tlN5pOT output.writeLong(fileSplitterFetch.nStartPos); @Hl+]arUh output.writeLong(fileSplitterFetch.nEndPos); G+t=+T2m }
T|2v1Vj output.close(); XE8%t=V!c$ } y7Nd3\v [\ catch(IOException e){e.printStackTrace ();} 3*E]
:l_ catch(Exception e){e.printStackTrace ();} &W}6Xg( } cEIs9; c5Hyja= 6!C>J#T //读取保存的下载信息(文件指针位置) M0t9`Z9 private void read_nPos() K@vU_x0Sl { UZ1Au;(| try{ -'
=?Hs. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >uxAti\ int nCount = input.readInt(); 3i#'osq nStartPos = new long[nCount]; !ou;yE&<, nEndPos = new long[nCount]; tC5>K9Ed for(int i=0;i<nStartPos.length;i++) (W.G&VSn) { yUN>mD- nStartPos = input.readLong(); Y[s}?Xu]w# nEndPos = input.readLong(); s`|KT&r } $|N\(}R input.close(); ? ph>:M } ovZ!} catch(IOException e){e.printStackTrace ();} )|GYxG;8C catch(Exception e){e.printStackTrace ();} }S;A%gYm } VHG}'r9KC% qFI19`?8E ?z0W1a private void processErrorCode(int nErrorCode) yG^pND>_df { V}ls|B$Y System.err.println("Error Code : " + nErrorCode); t)mc~M9w } }nptmc QabLMq@n` [@2$W?0i //停止文件下载 TUARYJ6= public void siteStop() m%b#B>J,n { !AG {`[b bStop = true; fVJWW): for(int i=0;i<nStartPos.length;i++) "8Lv fileSplitterFetch.splitterStop(); rN,T}M=2 L^=G(op* &(m01 } Hp*N% } dl(!{tZ# //负责部分文件的抓取 6#Rco%07zI **FileSplitterFetch.java Ph)>;jU */ Z FX6iAxd package NetFox; e>P>DmlW *-S?bv,T' TkVqv v import java.io.*; :%h|i&B
import java.net.*; X6BOB? j_h0hm] %/d1x public class FileSplitterFetch extends Thread { s{*bFA Z1F ^v+p@k czsnPmNEI String sURL; //File URL r5y*SoD! long nStartPos; //File Snippet Start Position DPkH:X long nEndPos; //File Snippet End Position ,b:~Vpb1I int nThreadID; //Thread's ID `fE'$2 boolean bDownOver = false; //Downing is over i1K$~ boolean bStop = false; //Stop identical G=LK
irj( FileAccessI fileAccessI = null; //File Access interface lh6N3d |D_4 iFC .#Z"Sj public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {gxP_> { #N;&^El this.sURL = sURL; h^,av^lg^ this.nStartPos = nStart; ZZ
T
9t#~ this.nEndPos = nEnd; ]0g p.R nThreadID = id; =G !]_d0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 ^9><qKbO } |7Qe{ 13 %:3W( !L<z(dV|( public void run() rs,'vV-2\ { hZw8*H^tP while(nStartPos < nEndPos && !bStop) 7*
[ { N( f0, %j2$ ezud 3#Iq5vT try{ nFWiS~(#sW URL url = new URL(sURL); V9D q<y-y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DS_0p|2 httpConnection.setRequestProperty("User-Agent","NetFox"); "y5bODq3t String sProperty = "bytes="+nStartPos+"-"; 7-0j8$` httpConnection.setRequestProperty("RANGE",sProperty); g+7j?vC{' Utility.log(sProperty); z`p9vlS[ ~z,qr09 <AK9HPxP InputStream input = httpConnection.getInputStream(); .Hk.'>YR //logResponseHead(httpConnection); i5|)|x3 :i|]iXEI" O<ybiPR byte[] b = new byte[1024]; h
lSav?V_ int nRead; @(0O9L
F while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2H`>Kj { 3d,:,f|h nStartPos += fileAccessI.write(b,0,nRead); R}IuMMx //if(nThreadID == 1) Xq<_r^ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FlUO3rc| } bkz/V/ Y bcT'!: X<5&R{oZ Utility.log("Thread " + nThreadID + " is over!"); !R@jbM bDownOver = true; ,9MNB3 //nPos = fileAccessI.write (b,0,nRead); oS}fr? } x0K#- catch(Exception e){e.printStackTrace ();} HKIr? } Q#*R({)GH } Z>l<.T"t' FGhnK' 3sW!ya-VZ //打印回应的头信息 bnPhhsR public void logResponseHead(HttpURLConnection con) "{trK?-8% { *Vg) E*s for(int i=1;;i++) eNO[ikm { +1@'2w{ String header=con.getHeaderFieldKey(i); ;.b^&h if(header!=null) &aa3BgxyE //responseHeaders.put(header,httpConnection.getHeaderField(header)); -%Rbd0gVH\ Utility.log(header+" : "+con.getHeaderField(header)); ;}M&fXFp"| else Z[0/x.pp$ break; 4Xww(5?3 } `m#i|8 } m&z(2yb1 '=eVem= 6{0MprY public void splitterStop() REh\WgV!u { URt+MTU[ bStop = true; /8<c~ } S]Di1E^r;_ U3{4GmrT YK5(o KFN } [=tIgMmz {[hgSVN; `U|zNizO /* 0cVxP)J+ **FileAccess.java mIPDF1=) *//文件访问(定位,写) $RunGaX!=N package NetFox; j(}pUV B import java.io.*; WF_QhKW|k IYHNN G]{^.5 public class FileAccessI implements Serializable{ |n^rI\p% .g?D3$|K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >3~)2)Q RandomAccessFile oSavedFile; cYXL3)p*Q long nPos; bUds E1f ] W$V# ?RW1%+[ public FileAccessI() throws IOException DrbjklcUU { $o9@ ?2 this("",0); g \ou+M# } kbJ4CF}H B6KG\,'| M*C1QQf\N public FileAccessI(String sName,long nPos) throws IOException MmePhHf { a.RYRq4o oSavedFile = new RandomAccessFile(sName,"rw"); wp5H|ctl this.nPos = nPos; dV16' oSavedFile.seek(nPos); .p?SPR } qQ6@43TC -yTIv*y wh2E$b(- public synchronized int write(byte[] b,int nStart,int nLen) & JJ*?Dl { _ n1:v~ int n = -1; shP}T[< try{ F2ISg' oSavedFile.write(b,nStart,nLen); z#rp8-HUDS n = nLen; ;>;it5 l= } "Nz@jv? catch(IOException e) >oaL -01i { o^MoU2c e.printStackTrace (); ZU;jz[} } F6b;qb6n wXKt)3dm u TJ_6:;4,|_ return n; Zb|a\z8 ? } {E7STLQ_% qmenj LR\8M(rtvH } pd& HC R@/"B?`(f 2JcP4!RD /* 3 `mtc@* **SiteInfoBean.java >,I'S2_Zl */ &\Lu}t7Ru package NetFox; ZLPj1L c@)?V>oe &%8IBT public class SiteInfoBean { #};Zgixo$ };EB[n jW-;Y/S private String sSiteURL; //Site's URL 412E7 private String sFilePath; //Saved File's Path hE$3l+ private String sFileName; //Saved File's Name |JP'j1 Ka private int nSplitter; //Count of Splited Downloading File fny6`_O M)AvcZNs h@\HPYi#. public SiteInfoBean() ?r5a* {//nSplitter的缺省值为5 r.6?| //default value of nSplitter is 5 ,?Zy4- this("","","",5); ='_3qn. } i\gt
@ 79-50}A +Ar4X-A{y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) q^n
LC6q { 1oQbV`P sSiteURL= sURL; {6wXDZxv sFilePath = sPath; (TO<SY3AB sFileName = sName; W:6#0b"_# this.nSplitter = nSpiltter; 25 :v c0 n%iL+I kC6Y?g } 4FZ/~Y1} |"9vq<` i~R+g3oi public String getSSiteURL() p~""1m01,D { Sm?|,C3V return sSiteURL; 7,V_5M;t } LU`) w"#rwV& %}Y&qT? public void setSSiteURL(String value) QD%6K=8Q { >!{8)ti sSiteURL = value; aNQ(xiskb } rKdsVW k B4Fz 8Gy*BpmJn public String getSFilePath() 81(\8#./ { sG[qlzR=8 return sFilePath; aGsO~ODc } s{V&vRr 8Q{9AoQ3' w'VuC82SZ public void setSFilePath(String value) U5@B7v1 { \u(Gj]B#" sFilePath = value; v0tFU!Q% } dLwP7#r 8*&73cp Gm=&[?} public String getSFileName() l @@pXg3 { Qz%q#4Zb return sFileName; ZrA*MN } (x.qyYEoI 6Yt3Oq<U NLYf public void setSFileName(String value) pS7y3(_ { 61OlnmvE sFileName = value; Gl45HyY_ } I,,SR" aRI. &3- _5O~]} public int getNSplitter() %W| Sl { :?m"kh
~ return nSplitter; C=U4z|Ym } 9f5~hBlo 1&7?f DB_oRr[oj public void setNSplitter(int nCount) (b&Z\?" { W[]|Uu/% nSplitter = nCount; ,HmGp } ^^tTA^ } .pm%qEh )hoVB W_Y56@7e /* $vYy19z **Utility.java yfR0vp<& */ KM"?l<x0Y package NetFox; 7!m<d,]N '"rm66 5nceOG8 public class Utility { Nlwt}7 Z("N
*`VP; CWYOzqf public Utility() qt"6~r! {
vk( I7 7M5HvG#w% v4uQ0~k~X } ?:l:fS0:{ 5INw#1~ //线程睡眠 2bw.mp&v1 public static void sleep(int nSecond) ;'Z"CbS+ { -4F}I3I try{ xcQ^y}JN Thread.sleep(nSecond); D(dV{^} 9 } oY,{9H37b catch(Exception e) :J2^Y4l2 { f><V;D# e.printStackTrace (); v@s"*E/PF7 } ; 4/ n~ } k+je-%hPj .Zs.O/ //日志 erTly2-SJ public static void log(String sMsg) 5xNOIOpDB { a[sdYZ System.err.println(sMsg); Xa$%`
} aM,g@'.= 2~r2ErtS v~._]f$: public static void log(int sMsg) s=E6HP@q { xt`a":lr u System.err.println(sMsg); HL>l.IG? } EUH9R8) } _z.CV< s*i,Ph Lk^bzW>f /* c*"P+ **TestMethod.java IEJ)Q$GI# */ Txpj#JD package NetFox; wGIRRM !b (R RRG;*n# 6!*zgA5M' public class TestMethod { j/E(*Hv J\'f5)k bS55/M w public TestMethod() cP@H8|c= { ///xx/weblogic60b2_win.exe fmUrwI1 % try{ ^r7KEeVD SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .i` -t" //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %P#|
} SiteFileFetch fileFetch = new SiteFileFetch(bean); a8k`Wog fileFetch.start(); GU Mf}y } 9]tW; ? catch(Exception e){e.printStackTrace ();} M.)z;[3O G2@'S&2@s ]<q!pE;t } ["ocZ? x `(O#$n $,I@c"m{ public static void main(String[] args) JlEfUg#* { ;4v`FC> new TestMethod(); ,,)'YhG( } $!z .[GL } P(C5@x(Z 点击下载更多相关资料
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