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/* 0SJ(Ln`0K **SiteFileFetch.java AH^'E */
&0OH:P% package NetFox; B.#-@ import java.io.*; >bg{ import java.net.*; hfs QAa bUc++M hPt=j{aJ%< public class SiteFileFetch extends Thread { ^CB@4$! PrF('PH7i 3lgD,_& SiteInfoBean siteInfoBean = null; //文件信息Bean x6Q_+!mnk long[] nStartPos; //开始位置 \psO$TxF= long[] nEndPos; //结束位置 fF.+{-. FileSplitterFetch[] fileSplitterFetch; //子线程对象 +B4 i,]lCx long nFileLength; //文件长度 R[H#av boolean bFirst = true; //是否第一次取文件 \M~uNWv| boolean bStop = false; //停止标志 B X O, File tmpFile; //文件下载的临时信息 9/O\769"' DataOutputStream output; //输出到文件的输出流 m
[BV{25 \mw5
~Rf; //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >dwY(a public SiteFileFetch(SiteInfoBean bean) throws IOException H h%|}*f_, { 'i 8`LPQ siteInfoBean = bean; pMkM@OH
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +l<;?yk:; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); |C7=$DgwY if(tmpFile.exists ()) %
xBQX { }1NNXxQ bFirst = false; ;s5JYR read_nPos(); I3 YSW } 3
op{h6 else th+LScOX { ~2QD.( nStartPos = new long[bean.getNSplitter()]; hjp,v)# nEndPos = new long[bean.getNSplitter()]; -c%'f&P } T!>sL=uf XKvH^Z4h{l x'V:qv*O y>ePCDR3 } .<6'*XR K pmq C$ >eX 9dA3X public void run() cY.5z:7u~v { 3GXmyo:o$ //获得文件长度 aF.fd2k //分割文件 }q:4Zh'l! //实例FileSplitterFetch (1%A@4 //启动FileSplitterFetch线程 H~W=#Cx //等待子线程返回 GsIqUM#R try{ JY$;m3h if(bFirst) yRt7&,}zL { MkM`)g 5
nFileLength = getFileSize(); #X0Y8:vj if(nFileLength == -1) 1c4:'0 { %5j*e System.err.println("File Length is not known!"); 2QKt.a }
z!)@`? else if(nFileLength == -2) E+Dcw { 9M@,BXOt System.err.println("File is not access!"); @[]#[7 } {Bb:\N8X else 2FEi-m} { w+hpi5OH for(int i=0;i<nStartPos.length;i++) |^OK@KdL1 { Uq.hCb`: nStartPos = (long)(i*(nFileLength/nStartPos.length)); B9]bv] } ]i8t for(int i=0;i<nEndPos.length-1;i++) .v['INK9 { o RK:{?Y nEndPos = nStartPos[i+1]; [!`5kI } )-\qo#0l nEndPos[nEndPos.length-1] = nFileLength; -K6y#O@@ } -6#
_ t } ~g*5."-i ;G*)7fi ]qiX"<s>~C //启动子线程 `{Fz fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; igF<].'V for(int i=0;i<nStartPos.length;i++) 0*6Q8`I { FPu$N d&\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Tj!rAMQk siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A&X
XL~yH nStartPos,nEndPos,i); 8*&YQId~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,Eo\(j2F. fileSplitterFetch.start(); (SByN7[gb } J#\oc@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W4)bEWO+q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yn.[- // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", TpxAp',#7 nEndPos = " + nFileLength); X5+$:jq& // fileSplitterFetch[nPos.length-1].start(); ix5<h } Twk<< d1 lxz?r //等待子线程结束 e /L([ //int count = 0; HP:[aR!2P //是否结束while循环 AL|3_+G boolean breakWhile = false; D{JwZL@7k2 C4gzg f0*_& rP while(!bStop) =:\5* { SA?1*dw) write_nPos(); =D)ADZ\<r Utility.sleep(500); T2|os{U breakWhile = true; T/jxsIt3 y8dOx=c wqgKs=y for(int i=0;i<nStartPos.length;i++) hbs /S { hd)WdGJp if(!fileSplitterFetch.bDownOver) otQ
G6 { 9G4os!x) breakWhile = false; xp *d: break;
=)J<R; } l/A!ofc#) } 6Y9<| . if(breakWhile) W?n/>DML break; M*aYcIU(( NosOd*S )#sN#ZR$ //count++; j3j^cO[ 8v //if(count>4) {d> 6*b // siteStop(); N[N4!k )!$ } ."`||@| 7t+H94KG7 t;_1 /mt System.err.println("文件下载结束!"); (*\y } A:5P catch(Exception e){e.printStackTrace ();} X,D ]S@ } w{GEWD{& kB=5=#s %Lq}5zB //获得文件长度 ypx`!2Q$ public long getFileSize() A>\3FeU>UC { >S%}HSPKq int nFileLength = -1; NWj4U3x try{ !p_l(@f URL url = new URL(siteInfoBean.getSSiteURL()); }sp?@C,Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AnpO?+\HF httpConnection.setRequestProperty("User-Agent","NetFox"); ,_K:DSiB Uh'W d_? >2NsBS( int responseCode=httpConnection.getResponseCode(); Fzz9BEw(i if(responseCode>=400) & d* bQv$ { UU '9 processErrorCode(responseCode); Y]i:$X]C?X return -2; //-2 represent access is error W9{y1,G9 } m<!CF3g #hXuGBZEI !04^E String sHeader; }&%&0$% #;UoZJ B WN o+% for(int i=1;;i++) &iT^IkA{ { &uI33= //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ER:K^
Za //Utility.log(in.readLine()); (U:6vk3Q sHeader=httpConnection.getHeaderFieldKey(i); 1;v wreJ if(sHeader!=null) }xY|z"& { rw75(Lp{ if(sHeader.equals("Content-Length")) |C>\ku* { -o57"r^x nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (A-Uo
break; EW/N H&{ } 'lmjZ{k } l!ZzJ& else muO;g& break; A@reIt } ?28)l
4 Ml } In*0. catch(IOException e){e.printStackTrace ();} {fMo#`9= catch(Exception e){e.printStackTrace ();} Z1wfy\9c8 ;XXEvRk Uh^j;s\y Utility.log(nFileLength); WL3J>S_ Y>K8^GS nyOvB#f return nFileLength; !RN9wXS7 } y tTppmJF U[:Js@uH_ Kc+9n%sp //保存下载信息(文件指针位置) 5"D\n B% private void write_nPos() Ah
zV?6e { f?"909& try{ fLV@~T| output = new DataOutputStream(new FileOutputStream(tmpFile)); NC|VZwQtm output.writeInt(nStartPos.length); y/+y |.Xg for(int i=0;i<nStartPos.length;i++) {wD "|K { P5'VLnE R{ // output.writeLong(nPos); ?l`|j* output.writeLong(fileSplitterFetch.nStartPos); \*c=bz&l output.writeLong(fileSplitterFetch.nEndPos); s*vtCdrE.
} .C1g Dry] output.close(); pWKI^S } #?~G\Ux0/ catch(IOException e){e.printStackTrace ();} ,Uy~O(Ft catch(Exception e){e.printStackTrace ();} Po.izE!C } P+,YWp g5
y*-t ^;@!\Rc //读取保存的下载信息(文件指针位置) vQ[ TcV private void read_nPos() E%$[*jZ { ictOCF try{ xP 3>8Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SnoEi~Da int nCount = input.readInt(); ,;yaYF6|/ nStartPos = new long[nCount]; t<cWMx5ra nEndPos = new long[nCount]; &pAmFe for(int i=0;i<nStartPos.length;i++) S4{\5ulr7 { \G6V -W nStartPos = input.readLong(); +Xmza8T9 nEndPos = input.readLong(); >9[wjB2?} } MED_#OS input.close(); a(x#6 } T=fVD8 catch(IOException e){e.printStackTrace ();} Vtk}>I@% catch(Exception e){e.printStackTrace ();} bWzUWLa } ^k!u (KR.dxzjf q&,uJo private void processErrorCode(int nErrorCode) ;$UB@)7% { ,km`-6.2? System.err.println("Error Code : " + nErrorCode); oSP^
.BJ$ } ?q"9ZYX< KzB9
mMrO bbWW|PtWwP //停止文件下载 W}k)5<C4v public void siteStop() 1["IT.,f. { 'he&h4fm bStop = true; x!UGLL]_M for(int i=0;i<nStartPos.length;i++) ?)4c!3# fileSplitterFetch.splitterStop(); Q>\9/DjUp /-g%IeF ;AT~?o`n } ts=+k/Z } K?V'
?s //负责部分文件的抓取 M'$?Jp#]} **FileSplitterFetch.java wVUm!Y */ XMpE|M!c package NetFox; smX&B,&@ 7] 17?s]t, WQHlf0] import java.io.*; m_UzmWF import java.net.*; &-|(q!jm Gdlx0i r
D|Bj(X8 public class FileSplitterFetch extends Thread { AaJz3oncJ OWmI$_L QC+BEN$ String sURL; //File URL 58Z,(4:E long nStartPos; //File Snippet Start Position _i0,?U2C long nEndPos; //File Snippet End Position s?&UFyYb, int nThreadID; //Thread's ID <2PO3w?Z boolean bDownOver = false; //Downing is over C6:;
T% boolean bStop = false; //Stop identical Y^,G}
&p FileAccessI fileAccessI = null; //File Access interface 0j[%L!hny e'dZ2;X$zo o]0\Km public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException M\=/i\- { /^Zgv-n this.sURL = sURL; 0+_:^z this.nStartPos = nStart; yzz(<s:o/ this.nEndPos = nEnd; )H<F([Jri nThreadID = id; y;tX`5(fe fileAccessI = new FileAccessI(sName,nStartPos);//定位 A<cnIUW } K<"Y4O#] 9icy&' ,in"8aT}~ public void run() CSIsi]H { !,;/JxfgVh while(nStartPos < nEndPos && !bStop)
aP +) { Evq^c5n>{ Vxim$'x! M"z3F!-j try{ q]z%<`.9* URL url = new URL(sURL); Su[f"2oR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y_M3-H=0 httpConnection.setRequestProperty("User-Agent","NetFox"); x5!lnN,# String sProperty = "bytes="+nStartPos+"-"; J ?H|" httpConnection.setRequestProperty("RANGE",sProperty); zvh&o*\2<d Utility.log(sProperty); $lAhKpdlW (\$=+' hy F0+@FS0 InputStream input = httpConnection.getInputStream(); bOdyrynh //logResponseHead(httpConnection); ,F0bkNBG /PtmJ2[ <,(Ww byte[] b = new byte[1024]; yyuf int nRead; 8,&QY%8pX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Z~ {[YsG { R>`TV(W`9 nStartPos += fileAccessI.write(b,0,nRead); r!O4]j_3 //if(nThreadID == 1) OEj%cB! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7a'@NgiGg } m*H6\on: aZYs?b>Gm mX
QVL.P\ Utility.log("Thread " + nThreadID + " is over!"); iC Z1ARi bDownOver = true; W8s/" //nPos = fileAccessI.write (b,0,nRead); h%(0| } (Qz|
N catch(Exception e){e.printStackTrace ();} 8nHFNOv6 } 9y5nG } ;p2a .P mi$*,fz ~JxAo\2i //打印回应的头信息 #kL4Rm; public void logResponseHead(HttpURLConnection con) B}2 JK9 { Km,:7#aV for(int i=1;;i++) St~a/Lq6 { %%Z|6V74 String header=con.getHeaderFieldKey(i); >PK\bLEo if(header!=null) D*o[a#2_ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8i?h{G IMV Utility.log(header+" : "+con.getHeaderField(header)); h**mAa0fo else FQ6{NMz,h break; gjhWoZV } dFVm18 } ,daZKxT tz"zQC$ b>"=kN/ public void splitterStop() N"#=Q=)x { 5K % bStop = true; Fwv(J_'q } fW.)!EPO p}R3AJ .#$D\cwV } qECta'b& z2.Z xL"*
dzwto; /* ~V<62"G **FileAccess.java G9i?yd4n=B *//文件访问(定位,写) (3M7 RpsL@ package NetFox; U `<?~Bz import java.io.*; \%011I4 dGBVkb4]T H@pF3gh public class FileAccessI implements Serializable{ +~]LvZtI_ ~J,e^$u //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^N_ ?&pgy RandomAccessFile oSavedFile; ]
cY long nPos; $+.!(Js"K L;s,x V {!rpE7P- public FileAccessI() throws IOException orzy&4 { o{wXq)b this("",0); X:Z*7P/ } 6t(I.>- dY%>C75O bp?4)C*R public FileAccessI(String sName,long nPos) throws IOException 7*&$-Hv { #GT4/Ej}W oSavedFile = new RandomAccessFile(sName,"rw"); Jv9yy~ this.nPos = nPos; W6[# q%o oSavedFile.seek(nPos); z?i{2Fz6 } X6g{qz Hg_ B'"RKs] 5Myp#!|x: public synchronized int write(byte[] b,int nStart,int nLen) H]/!J] { zV8^Hxl int n = -1; ?h4Rh0rkX try{ 49m}~J=* oSavedFile.write(b,nStart,nLen); C0@[4a$8f n = nLen; B&oP0 jS } d;9F2,k$w catch(IOException e) E\!<= { R7xEE7p e.printStackTrace (); J|A:C[7 2 } 4BgrG[l) zU$S#4/C hB)TH'R{: return n; M}
{'kK } 3\jcq@N 2XN];,{ R|h(SXa } BE]PM
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;v9 Y +9OP /* j\S}TaH0e **SiteInfoBean.java };=44E'7 */ CnA0^JX package NetFox; AT%@T| -I\Y
m_) (ug^2WG
Yq public class SiteInfoBean { Htu}M8/4 {KO+t7'Q PLmf.hD \ private String sSiteURL; //Site's URL v!EE[[ private String sFilePath; //Saved File's Path Q7b$j\;I private String sFileName; //Saved File's Name &7CAxU;i3 private int nSplitter; //Count of Splited Downloading File wUbs9y< O$Z<R:vVA (?7=$z!h public SiteInfoBean() gZD,#D.hR {//nSplitter的缺省值为5 dUg| {l //default value of nSplitter is 5 GcL:plz this("","","",5); xJ(4RaP } ;^K4kK&f
Mmu>&C\ 7u9!:}Tu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Y79{v nlGk { X( H-U
q*( sSiteURL= sURL;
g^dPAjPQ sFilePath = sPath; sZ!/uN!6 sFileName = sName; CI };$4W~ this.nSplitter = nSpiltter; Jm l4EW7 (\=iKE4# OYsG# } v)a$;P% },G>+ s8h qd7 86~ public String getSSiteURL() $Jt+>.44 { j5yxdjx9 return sSiteURL; 9(PQ7} } #6%9*Rh ^l(Kj3gM LmKG6>Q1#1 public void setSSiteURL(String value) !h "6h { rz@;Zn sSiteURL = value; pg%'_+$~m } 0rtP :Nj$ ZKv^q%92 )+nY-DB( public String getSFilePath() x*" 0dYH { LS=HX~5C return sFilePath; 'L"dM9#> } )fo9Qwe >,Zf3M V>`xTQG public void setSFilePath(String value)
%0z&k!P { SbLx`]rI sFilePath = value; -R[ *S " } fA]b'8 $1h , <$5H Y!8Ik(/~i public String getSFileName() -2dk8]KB] { cG"+n@\ return sFileName; H
',Nt } Fj`6v"h (>E70|T =psX2?%L public void setSFileName(String value) Zljj { `nxm<~-\ sFileName = value; kAEm#oz=g } =3Y:DPMB yX:*TK4 U2DE" public int getNSplitter() .5',w"R { GJL lMi return nSplitter; _IA@X. )? } XL/?v"
/ `(r[BV|h} gsqpQq7 public void setNSplitter(int nCount) yJ(p-3O5 { MmjeFv nSplitter = nCount; uHv9D%R } Hvn{aLa. } nH#|]gVI K&t+3O 4&Q.6HkL /* O;u&>BMk **Utility.java ~"E@do(" */ yX}riXe package NetFox; }4!R2c o2FQ/EIE v>2gx1F"? public class Utility { |G+6R-_ vpoeK'bi, c&1:H1# public Utility() z(AhO { V Q6&7@
c <$^76=x,8P z*cC2+R}= } p*T`fOL .kl _F7 //线程睡眠 ]*8K4n G public static void sleep(int nSecond) .Y8z3O { cax]lO try{ Ylc[ghx Thread.sleep(nSecond); 8\+Q*7~@i } Jon<?DQj
catch(Exception e) e5!LbsJv { H]LH~l e.printStackTrace (); i )Hjmf3 } >Cb[ } Vf67gux 4,o|6H //日志 8._
A[{.f public static void log(String sMsg) L#Mul&r3x0 { YxEc(a" System.err.println(sMsg); K5O#BBX= } zFy0SzF t;7 tuq
v-;j44sB public static void log(int sMsg) p#VA-RSUQ| { N|n"JKw) System.err.println(sMsg); ,4bqjkX5q } 9oly=&lJ } <q
V<dK&W 28KS*5S a=<l}`* /* Le&SN7I **TestMethod.java r sf +dC */ <1HbjRw package NetFox; nu1s B 4pJg Voi`OCut public class TestMethod { fdIO'L_ ZGUhje! G+^Q
_w public TestMethod() gpB pG { ///xx/weblogic60b2_win.exe ^-,
aB try{ UN7>c0B SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); "r6DZi(^K //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); wI!>IV(5 SiteFileFetch fileFetch = new SiteFileFetch(bean); ?U~9d"2= fileFetch.start(); <P)vx } K,7IBv,B[ catch(Exception e){e.printStackTrace ();} k_p4 f %9 xef@-%mcoy 50:gk*hy } D<=:9 j'#Y$d1. kY8aK8M public static void main(String[] args) /Ulv/Thl { 4ZY0!'be-R new TestMethod(); ,q F;#nB- } :Ogt{t } #&JhA2]q 点击下载更多相关资料
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