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/* X7rsO^}W **SiteFileFetch.java /PKu",Azj */ LC4W?']/ package NetFox; Bm5\*Xd1( import java.io.*; 4-?zW import java.net.*; !'#GdRstv @\WeI"^F8 ||))gI`3a public class SiteFileFetch extends Thread { #}lWM%9Dy |s,y/svp K: |-s4= SiteInfoBean siteInfoBean = null; //文件信息Bean X4<Y5?&0 long[] nStartPos; //开始位置 {TZV^gT4 long[] nEndPos; //结束位置 DB+oCE<.# FileSplitterFetch[] fileSplitterFetch; //子线程对象 bao"iv~z long nFileLength; //文件长度 W]5Hc|!^^ boolean bFirst = true; //是否第一次取文件 w$Z%RF'p boolean bStop = false; //停止标志 (<}BlL File tmpFile; //文件下载的临时信息 L6"V=^Bq DataOutputStream output; //输出到文件的输出流 kEp{L vSy[lB|)24 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?vfZ>7Q public SiteFileFetch(SiteInfoBean bean) throws IOException Am|)\/K+Z { <1#hX(Q siteInfoBean = bean; w6h*dh$w //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); IgN^~ag` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;Z9(ll:<$ if(tmpFile.exists ()) )b1X6w[ { J$U_/b.mk bFirst = false; )nGH$Mu read_nPos(); KE6XNG3 } k;Fxr% else *L~?.9R { V`8\)FFG nStartPos = new long[bean.getNSplitter()]; c#f@v45 nEndPos = new long[bean.getNSplitter()]; "yc|ng } I+,CiJ|4 N@Q_5t0bk *,zrg%8 e{H( } RT(ejkLZm Vg(M ^2L ?r{hrAx public void run() fB 0X9iV6j { 4Y{;%;-i //获得文件长度 [C\B2iU7_M //分割文件 %=Y=]g2 //实例FileSplitterFetch S!n?b|_ //启动FileSplitterFetch线程 8Wo!NG:V5 //等待子线程返回 cbYQ';{ try{ D"2bgw if(bFirst) w"37sv { ((&5F!+\- nFileLength = getFileSize(); CDPu(,^ if(nFileLength == -1) &WeN{ { G+2 ,x0( System.err.println("File Length is not known!"); hV+=hX<h } cwOa"]t} else if(nFileLength == -2) kS?CKd9by { ^wD`sj<Qg System.err.println("File is not access!"); MxH |yo[ } !b=W>5h else *^w}SE( { 7?D?s!%\ for(int i=0;i<nStartPos.length;i++) >=:^N-a { NTEN nStartPos = (long)(i*(nFileLength/nStartPos.length)); rHi4Pw{L } `(ik2#B`} for(int i=0;i<nEndPos.length-1;i++) T2n3g|4 { S>)[n]f nEndPos = nStartPos[i+1]; w IP4Z^ } t
.}];IJP nEndPos[nEndPos.length-1] = nFileLength; ~ToU._ } gm%cAme } <k0/O [RF]lM]w |?]doBm| //启动子线程 t 4VeXp6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 1=,y+Xpw for(int i=0;i<nStartPos.length;i++) 4U16'd { WEJ-K<A( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !iq|sXs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), E*IP#:R nStartPos,nEndPos,i); =ZO lE|4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); X7[gfKGL)N fileSplitterFetch.start(); $$uMu{?0i } pTB7k3g // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t-5Y,}j siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); k]^ya?O]p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~L>86/hP,N nEndPos = " + nFileLength); 0m=57c$O // fileSplitterFetch[nPos.length-1].start(); 6^!fuIZ;_ cRuN; zWv0y8[d //等待子线程结束 yn"4qC#Z //int count = 0; J .VZD //是否结束while循环 O;5lF boolean breakWhile = false; G')zDx }'fa f{W Yg,;l-1 while(!bStop) c&x1aF "B { 74a@/'WbE write_nPos(); V#5$J Xp Utility.sleep(500); ky-nP8L} breakWhile = true; 9e c},~( J3(E{w8Q 4 R(m$!E! for(int i=0;i<nStartPos.length;i++) 0\vG
< { QxN1N^a0 if(!fileSplitterFetch.bDownOver) qE|syA9 { &r~s3S{pQ breakWhile = false; QQ_7Q^ break; H9PnJr8 \ } 1q@R04i } X:I2wJDs\ if(breakWhile)
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? break; hF$qH^-c*A <hj2'dU ~%C F3?e6 //count++; [0hahR //if(count>4) A)V*faD // siteStop(); 01n132k } y4LUC;[n :e nR8MS <9piKtb|L System.err.println("文件下载结束!"); uo J0wG. } f$6N catch(Exception e){e.printStackTrace ();} 7Xu# |k } zA8@'`Id 1DhC,)+D}q d6ef)mw //获得文件长度 vV*J;%MO public long getFileSize() )XGz#C_P { Lt=32SvTn int nFileLength = -1; q\x.e.@ try{ Rw%?@X3m] URL url = new URL(siteInfoBean.getSSiteURL()); #{{p4/: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); u '/)l} httpConnection.setRequestProperty("User-Agent","NetFox"); Nh_\{
&r aK95&Jyw& hc+B+-, int responseCode=httpConnection.getResponseCode(); N%xCyZ if(responseCode>=400) ,ofE*Wt { -egnMc67 processErrorCode(responseCode); DyCzRkH return -2; //-2 represent access is error e,VF;Br } ,z>-_HOnw 86N,04 fZ5 UFq_~s String sHeader; 83SK<V6 IQ~qiFCf }8#Ed;%K for(int i=1;;i++) bT&{8a { u~j
H
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); R:YVmqd //Utility.log(in.readLine()); %),u0:go sHeader=httpConnection.getHeaderFieldKey(i); !C05;x8{ if(sHeader!=null) 5cinI^x)f { MTZCI} if(sHeader.equals("Content-Length")) }O>1tauI { `G/g/>y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); } `Ya; break; rU&Y/ } P1T{5u!T } pR93T+X else NWvIwt{ break; _<FUS'" } h=gtuaR4 } 8K-P]] catch(IOException e){e.printStackTrace ();} MiIxj%,( catch(Exception e){e.printStackTrace ();} 2Kz$y
JTp vN\[2r%S V%PQlc.X Utility.log(nFileLength); `Ucj_6&Tqs D@gC(&U/6 k|?[EWIi^ return nFileLength; 3&7? eO7* } *
7Ov.v% &C+2p 3PZ(Kn< //保存下载信息(文件指针位置) 1h?ve,$ private void write_nPos() Yq6 @R|u { CYgokS\=, try{ &Wcz~Gx3Q output = new DataOutputStream(new FileOutputStream(tmpFile)); Se'SDJl= output.writeInt(nStartPos.length); &BrFcXF for(int i=0;i<nStartPos.length;i++) /go[}X5QR[ { 8]^|&"i.\d // output.writeLong(nPos); Wn+s:ov output.writeLong(fileSplitterFetch.nStartPos); #eOHe4Vt output.writeLong(fileSplitterFetch.nEndPos); ,^8':X"A{! } \f?
K74 output.close(); `|?<KF164 } <I34@;R c catch(IOException e){e.printStackTrace ();} [B;okW catch(Exception e){e.printStackTrace ();} t-KicLr }
_$c o Y r^}0qO,XM 3kC|y[.& //读取保存的下载信息(文件指针位置) x4c|/}\)*
private void read_nPos() aYT!xdCI { ~LpkA`Hn! try{ /X.zt
` DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Lk,q~
int nCount = input.readInt(); SDO:Gma nStartPos = new long[nCount]; 'LPyh ;!f nEndPos = new long[nCount]; te-xhJ&K for(int i=0;i<nStartPos.length;i++) (9I(e^@] { q9rm9#}[J# nStartPos = input.readLong(); FsJk"$} nEndPos = input.readLong(); jDb\4QyC } 7WS$fUBi input.close(); (KyOo,a } re[5lFQ~Z catch(IOException e){e.printStackTrace ();} NL$z4m0 catch(Exception e){e.printStackTrace ();} }k-8PG = } XdCP!iq*8 E#:!&{O b.RU%Y#>\ private void processErrorCode(int nErrorCode) /Tm+&Jd { ?[zw5fUDS System.err.println("Error Code : " + nErrorCode); AF"7 _ } InbB2l4G UzaAL9k GJcxqgk$ //停止文件下载 4z(B`t~7 public void siteStop() 4bA^Gq { 7:?\1a bStop = true; T^|k` for(int i=0;i<nStartPos.length;i++) AaA!U!B fileSplitterFetch.splitterStop(); "NLuAB.P Hq::F? .(q'7Q Z/ } dV38-IfGkl } HP]5"ziA //负责部分文件的抓取 OS@uGp=
**FileSplitterFetch.java s2SV
*/ m8{8r>6* package NetFox; N s0,Z#Z+ ,H+Y1N4W( U[x$QG6 m! import java.io.*; F><_gIT import java.net.*; mN]WjfII ]#f%Dku.m ljZRz$y public class FileSplitterFetch extends Thread { 4E 5;wH M{G}-QK_. NJsaTBT String sURL; //File URL U&BCd$ long nStartPos; //File Snippet Start Position _xCYh|DlQ| long nEndPos; //File Snippet End Position aq_K,li#w int nThreadID; //Thread's ID (@XQ]S}L boolean bDownOver = false; //Downing is over Tph^o^ boolean bStop = false; //Stop identical ,b!D8{W"N FileAccessI fileAccessI = null; //File Access interface V9$T=[ AE~a=e\x i8e*9;4@ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Fnak:R0 { Ez|NQ:o this.sURL = sURL; 3JQ7Cc> this.nStartPos = nStart; *4%pXm; this.nEndPos = nEnd; EOu[X'gLr nThreadID = id; d%0Gsga} fileAccessI = new FileAccessI(sName,nStartPos);//定位 q`r| DcN~ } 4Z%1eOR9V /A,w{09G 3S+9LOrhY public void run() PF/K&&9} { #)~u
YQ while(nStartPos < nEndPos && !bStop) D(']k? { bKsjbYuo *:xOenI 8]`#ax
5 try{ |D-[M_T5 URL url = new URL(sURL); RR[zvH} E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )TiM>{ httpConnection.setRequestProperty("User-Agent","NetFox"); T}^3 Re`i String sProperty = "bytes="+nStartPos+"-"; 41Q5%2
httpConnection.setRequestProperty("RANGE",sProperty); _"@:+f, Utility.log(sProperty); Up?RN %gq q( ~rk :5&D6 InputStream input = httpConnection.getInputStream(); xD&n'M] //logResponseHead(httpConnection); ;G8H'gM07 kH hp;< Ny7*MZ- byte[] b = new byte[1024]; T>%
5<P int nRead; _*e_?]G- while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) r c[~S { vc"!3x-G* nStartPos += fileAccessI.write(b,0,nRead); @6~lZgXOV[ //if(nThreadID == 1) tIDN~[1 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
:2nsi4 } $T3_~7N *V',@NH#Os ni{'V4A Utility.log("Thread " + nThreadID + " is over!"); H@@ 4n%MK bDownOver = true; \B~g5}= //nPos = fileAccessI.write (b,0,nRead); ~;CNWJtcf( } \ZADY.ha catch(Exception e){e.printStackTrace ();} q&z'S } ;dUKFdKH} } nk tGO ZAfuW^r WlQCP C //打印回应的头信息 %:`v.AG public void logResponseHead(HttpURLConnection con) o]&q'>Rf { /jJD
{ for(int i=1;;i++) *]U`]!Esp { `$JvWN,kB String header=con.getHeaderFieldKey(i); /5Qh*.(S if(header!=null) Qb?a[[3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); kll!tT-N- Utility.log(header+" : "+con.getHeaderField(header)); r craf4% else KJQ8Yhq break; Ll; v[Y } RBf#5VjOG! } FCNYfjB% nu+K
N,3R" /xJD/"Y3& public void splitterStop() w*XM*yJHU { 4Pc-A bStop = true; wJ2cAX;" } nE8z1hBUq "|Q.{(|kO1 VnW6$W?g } bdstxjJ` hQx*#:ns +'gO%^{l /* BkB_?^Nv8 **FileAccess.java f> Jj5he/ *//文件访问(定位,写) Rs"=o>Qu package NetFox; 6agG*x import java.io.*; {rMf/ RAE 36OQHv;& ?:9y
!Q= public class FileAccessI implements Serializable{ x+4K ,r; 7<]&pSt= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 %OgK{h RandomAccessFile oSavedFile; i
kfJ! f long nPos; K_L7a>Fr $7AsMlq[( I1>f2/$z* public FileAccessI() throws IOException Cydo~/ { u|}\Af this("",0); u~uz=Yse } GYQ:G= A@<
! ' HcIJ&".~ public FileAccessI(String sName,long nPos) throws IOException #sCR} { ?P[:,0_ oSavedFile = new RandomAccessFile(sName,"rw"); q-Z<.GTq this.nPos = nPos; m-uXQS^@G oSavedFile.seek(nPos); Vc9Bg2f5 } ":+d7xR?o </_QldL_ ,H6P% public synchronized int write(byte[] b,int nStart,int nLen) j%`
C { @uyQH c,V int n = -1; &q|vvF<G try{ W[J2>`k9 oSavedFile.write(b,nStart,nLen); E va&/o?P| n = nLen; wry`2_c } ."dT6u E catch(IOException e) OAq-(_H { l=XZBe*[g' e.printStackTrace (); TW&s c9 } #\X)|p2 -S]ercar k0j4P^d return n; A nl1+ } ]*a(^*}A% 0O'M^[=d.8 b&`~%f- } >(H:eRKq x/{-U05 m_Hg!Lg /* :a&M]+! **SiteInfoBean.java
5:gpynE| */ 2&S^\kf package NetFox; qfT9g>EF b~fl,(sZp [F*yh9%\ public class SiteInfoBean { y]{b4e ?yAb=zI1b A*0X~6W private String sSiteURL; //Site's URL K3:z5j.X private String sFilePath; //Saved File's Path 4S4MQ private String sFileName; //Saved File's Name Nk-xnTZ" private int nSplitter; //Count of Splited Downloading File STu(I\9 R-pON4D"* 1d49&-N public SiteInfoBean() L>/$l( {//nSplitter的缺省值为5 zZ-/S~l //default value of nSplitter is 5 g~21|Sa$[ this("","","",5); /xgC`]- } qdk!.A{ c(Y~5A{TXO m
%+'St|qr public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :1f,%Z$,q { 4IZAJqw(* sSiteURL= sURL; E^n!h06~G sFilePath = sPath; ~ a2A"#f sFileName = sName; ]v:,<=S this.nSplitter = nSpiltter; Iw[zN[oz 9-j-nx
@) DmgDhNXKq } lv]U)p $Xo_8SX, k2->Z);X public String getSSiteURL() uYs45 G { ,DHH5sDCn return sSiteURL; Q3+%8zZI } zhow\l2t} bh8GP]*E| ]GRVU public void setSSiteURL(String value) @)Vb?|3 { .&]3wB~ sSiteURL = value; 2va[= >_ } 4Kj8i qYe`</ L=#B>Eu public String getSFilePath() s'tXb=!HO { \``w>Xy8 return sFilePath; F',1R"/} } z I9jxwXU NlhC7 fMf; public void setSFilePath(String value) D3g5#.$,}> { +-t&li%F sFilePath = value;
(oiQ5s^f } '#A_KHD ok ,O/|E}? 0*P-/)o x public String getSFileName() gmTBp}3 { ,^
-%< return sFileName; \s8h.xjU } pT+OPOSR ,%/F,O+# e 0$m<5 public void setSFileName(String value) hUi5~;Q5Fi { H]V(qq{ sFileName = value; hb1h.F } [Ti' X# 8$JJI({bH @CR<&^s5V public int getNSplitter() #l)o<Z { wk'(g_DP return nSplitter; 3:sc%IDP } 1A;,"8kBd A Ef@o+A ]_s;olKNI public void setNSplitter(int nCount) HIj:?y { o|84yT!~ nSplitter = nCount; Qe7
SH{ } o^uh3,. } Ia9!ucN7DA ?o]NV B2BG*xa /* kSge4?& **Utility.java !eb{#9S* */ \l[AD-CZPh package NetFox; N-}OmcO]e XkW@"pf&Fh @/01MBs; public class Utility { b<r*EY [r]<~$ pR*3Q@Ng public Utility() C2iOF /4 { m=pH G RAEN
&M &QHmo* } {9@E[bWp# DB jUHirK //线程睡眠 Q[`2?j? public static void sleep(int nSecond) .Xxxz
Wyk { `N7erM try{ &8%^o9sH Thread.sleep(nSecond); Iw$T'I+4W } z __#PQ,n catch(Exception e) Uq%|v { "$"<AKCwS e.printStackTrace (); rTC| 8e } ~Wm'~y> } g*9&3ov 8z&/{:Z@pH //日志 f4X}F|!h public static void log(String sMsg) '/ueY#eG { +~
S7]AZ System.err.println(sMsg); |CS&H2!s } >Zf*u;/dW$ su-0G?c q{yzux public static void log(int sMsg) >X>]QMfh { z;0]T=g System.err.println(sMsg); [ifQLsHA } OWN|W, } %z
@T / A}"uEk(R oY@]&A^ah /* m1 p%, **TestMethod.java el^<M,7! */ K^I$05idi package NetFox; )gR3S%Ju dt>!=<|k Z%-uyT@a public class TestMethod { .L]2g$W\p brn>FFAwO @:9mTP7 public TestMethod() gr>FLf
{ ///xx/weblogic60b2_win.exe Xn<|6u try{ D{t0OvQag SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h!hv{c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); PO2]x: SiteFileFetch fileFetch = new SiteFileFetch(bean); 5'0kf7 fileFetch.start(); >R/^[([;] } r^\Wo7q catch(Exception e){e.printStackTrace ();} 0wETv D>wo>,G .B$3y#TOb } Ujly\ix` %N<>3c<8P C|ou7g4'p public static void main(String[] args) %ZlnGr { y2C/DyuAY| new TestMethod(); \g@jc OKU } L\<J|87p? } %cMayCaI!@ 点击下载更多相关资料
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