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/* 3WY$WRv **SiteFileFetch.java ^pnG0(9 */ SC &~s$P; package NetFox; jJZgK$5+ import java.io.*; C'A]i5 import java.net.*; 1"#*)MF *e#<n_%R 1w(JEqY3h: public class SiteFileFetch extends Thread { xI*#(!x"G DI|:p!Nx L,,*gK SiteInfoBean siteInfoBean = null; //文件信息Bean ]aryV?!6 long[] nStartPos; //开始位置 JUAS$Y long[] nEndPos; //结束位置 ~z5R{;Nbz| FileSplitterFetch[] fileSplitterFetch; //子线程对象 8>WVodv long nFileLength; //文件长度 V DS23Bo boolean bFirst = true; //是否第一次取文件 )yK[ Zb[ boolean bStop = false; //停止标志 &w8)* T File tmpFile; //文件下载的临时信息 clw%B DataOutputStream output; //输出到文件的输出流 A"5z6A4WB $,>@o=)_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) b6(p public SiteFileFetch(SiteInfoBean bean) throws IOException ]iNEw9 { -62'}%?A<C siteInfoBean = bean; eP.Vd7ky //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); SJt<+kg tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0c^>eq] if(tmpFile.exists ()) X[gn+6WB% { L6Wt3U`l bFirst = false; dsx]/49< read_nPos(); BvrB:%_: } fFvF\ else CzCQFqXI { xVL5'y1g B nStartPos = new long[bean.getNSplitter()]; wCf~O'XLw nEndPos = new long[bean.getNSplitter()]; {O<l[|Ip } C:8_m1Y{ :,b
iyJt {gNV[45 r|e-<t4.9L } D]a <4a18 !\8 ;d8 I\~G|B public void run() %1 vsN-O}8 { jn >d*9u //获得文件长度 #rO8K f //分割文件 XdLCbY //实例FileSplitterFetch #GDe08rOw //启动FileSplitterFetch线程 {U<xdG //等待子线程返回 `U#55k9^5 try{ Z+j\a5d?, if(bFirst) `@[c8j7 { 4wd&55=2 nFileLength = getFileSize(); 2&c9q5.b if(nFileLength == -1) zA+~7;7E { )*; zW!H System.err.println("File Length is not known!"); 'Jf^`ZT} } Z[\O=1E, else if(nFileLength == -2) pD]0`L-HJU { 0;4t&v7 System.err.println("File is not access!"); @_:]J1jw7 } "8^5>EJWv else u]u[(K5F { o&AM2U/? for(int i=0;i<nStartPos.length;i++) ac kqH+' { dVB~Smsr nStartPos = (long)(i*(nFileLength/nStartPos.length)); "s!7dKXI" } kr$b^"Ku for(int i=0;i<nEndPos.length-1;i++) jdE5~a+ { D`J6h,=2l/ nEndPos = nStartPos[i+1]; J_Ltuso } ;S0Kh"A nEndPos[nEndPos.length-1] = nFileLength; LK6; ?m } }ENR{vz$A } 8Og_W8 P =3RLL<l W^3uEm&l!) //启动子线程 322jR4QGr fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; E9?phD for(int i=0;i<nStartPos.length;i++) r]3'74j: { JpsPNa fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <E\$3Ym9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), H$G0`LP0/a nStartPos,nEndPos,i); Mu'8;9_6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pdJ/&ufh fileSplitterFetch.start(); iyj+:t/ } ?4H i- // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), it] E-^2> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); p!k7C&]E // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", b'6-dU% nEndPos = " + nFileLength); 5_XV%-wM // fileSplitterFetch[nPos.length-1].start(); xss`Y,5? !mWiYpbU+ yG Wnod' //等待子线程结束 ` PYJ^I0 //int count = 0; /Uo
y/}! //是否结束while循环 =K{\p`? boolean breakWhile = false; Dfq(Iv Hwo$tVa:= Y"OG@1V;8 while(!bStop) tmqY2. { 1x,[6H write_nPos(); aK`@6F,]j Utility.sleep(500); c@v{`d breakWhile = true; cZ)}LX %tG*C,l] 22f`LoM for(int i=0;i<nStartPos.length;i++) b~nAPY6 { \:'%9 x if(!fileSplitterFetch.bDownOver) dCj,b$ { Q{B}ef breakWhile = false; |9~GM break; 6N)!aT9eo } 3O7!`Nm@ } $Of0n` e if(breakWhile) NPFpq,P> break; vN3Zr34 wdUBg*X8 ,t\* ZTt$ //count++; S"Zp D.XX //if(count>4) pp7$J2s+j // siteStop(); 5]M>8ll } i1S>yV^l hWH:wB :1Q!$ m System.err.println("文件下载结束!"); a{{g<<H } 0ez(A catch(Exception e){e.printStackTrace ();} UQB"v3Z } a33TPoj _/wV;h~R < yC //获得文件长度 u|4$+QiD public long getFileSize() SPp#f~%m { XS$OyW_Q int nFileLength = -1; -?(E_^ng try{ r#xg#u oj URL url = new URL(siteInfoBean.getSSiteURL()); 0_CN/5F HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i\W/C httpConnection.setRequestProperty("User-Agent","NetFox"); Z!U)I-x& M`ip~7" Yv:55+ e!| int responseCode=httpConnection.getResponseCode(); y#XbJuN/ if(responseCode>=400) ~#kT_*sw) { _x!7}O#k processErrorCode(responseCode); A^p[52` return -2; //-2 represent access is error d>{nQF;c } qL,tYJ<m% wC5ee:u C% 1UKg=A-q String sHeader; C`5 OK\A</8r w:
>5=mfk for(int i=1;;i++) cK 06]-Y { =b/L?dR.- //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -&<Whhs.@ //Utility.log(in.readLine()); A<W6=5h sHeader=httpConnection.getHeaderFieldKey(i); ?2>FdtH if(sHeader!=null) B, 9w0 { \?je Wyo if(sHeader.equals("Content-Length")) NMA}Q$o
s { jAud {m*T nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /PLn+- break; 1AU#%wIEP } cq$i } L:9F:/G else &LbJT$}V break; ?:w1je7 } E8-P"`Qba } K# Jk _"W catch(IOException e){e.printStackTrace ();} Sv &[f}S catch(Exception e){e.printStackTrace ();} J9=m]R8T 3;a<_cE*@ 5< ja3 Utility.log(nFileLength); zL\OB?)5J *6} N =Z VO"("7L return nFileLength; Ntbg`LGf'! } -=(!g&0 vBog0KD);s s M +WkN}{ //保存下载信息(文件指针位置) U4cY_p? private void write_nPos() z@w Mc
EH { {c
(!;U try{ og0*Nt+ output = new DataOutputStream(new FileOutputStream(tmpFile)); *W
kIq> output.writeInt(nStartPos.length); f"St&q>[s for(int i=0;i<nStartPos.length;i++) V
=-WYu { aJcf`<p // output.writeLong(nPos); 95z]9UL output.writeLong(fileSplitterFetch.nStartPos); ca>Z7qT! output.writeLong(fileSplitterFetch.nEndPos); 2z|*xS'G } &o<F7U'R output.close(); /r=tI)'$ } <A#
l
35 catch(IOException e){e.printStackTrace ();} KG=h& catch(Exception e){e.printStackTrace ();} -Y='_4s } Q_t`.jus !tp1:'KG FHC\?Cg //读取保存的下载信息(文件指针位置) $H-!j%hV private void read_nPos() (`:O~>[N { AhNq/?Q Q~ try{ xe*aC DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ak;*W int nCount = input.readInt(); A]DTUdL nStartPos = new long[nCount]; 0$-xw nEndPos = new long[nCount]; !=N"vD* for(int i=0;i<nStartPos.length;i++) fXc m|U,ho { Lliqj1& nStartPos = input.readLong(); k70|'* Kh nEndPos = input.readLong(); B`
k\ EL' } HB7;0yt`: input.close(); X_7UJ
jFw" } 3}/&w\$ catch(IOException e){e.printStackTrace ();} D#o}cC. catch(Exception e){e.printStackTrace ();} &cu lbcz } )4&cph'; -UD\;D?$ qv@$ZLR private void processErrorCode(int nErrorCode) u&n'
ITH { uh?>-
]r` System.err.println("Error Code : " + nErrorCode); BN4_: } Rb{U+/gq X#e1KZ MzL1Bh!M //停止文件下载 ]Ei0d8Uo public void siteStop() @U2qD
J6 { B4mR9HMh bStop = true; *;Ed*ibf for(int i=0;i<nStartPos.length;i++) DrO2 y fileSplitterFetch.splitterStop(); ?! `=X>5 /IM#.v sx`O8t } L\#<JxY$p } 3l#IPRn9AO //负责部分文件的抓取 uxzze~_+C **FileSplitterFetch.java P<f5*L#HD */ 6C+"`(u%V package NetFox; )lZp9O ?G-e](]^< :at$HCaK import java.io.*; zNIsf" import java.net.*; 1SR+m>pL r}jGUe}d k0Uyf~p~ public class FileSplitterFetch extends Thread { >b]S3[Q( t>[KVVg
W (4Zts0O\ String sURL; //File URL /\WQxe long nStartPos; //File Snippet Start Position <0PT"ij long nEndPos; //File Snippet End Position ,.qMEMm int nThreadID; //Thread's ID r9ww.PpNk# boolean bDownOver = false; //Downing is over f?'JAC* boolean bStop = false; //Stop identical wV^V]c ?U FileAccessI fileAccessI = null; //File Access interface m2v'WY5u |\g5+fv9 a!u
rew# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException j<)9dEM' { INyk3`FT this.sURL = sURL; sn?]n~z this.nStartPos = nStart; _`pD`7:aI^ this.nEndPos = nEnd; H[='~%D nThreadID = id; I;1lX
L fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?A )hN8 } &[;HYgp MKWyP+6` [/BE8]M~ public void run() Y>&Ew*Y { Z" uY}P3 while(nStartPos < nEndPos && !bStop) (1NA { _X'"w|0 PfZ+PqS ?:L:EW8 try{ mb!9&&2-t URL url = new URL(sURL); U\sHx68 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); = hN
!;7G httpConnection.setRequestProperty("User-Agent","NetFox"); }ga@/>Sl& String sProperty = "bytes="+nStartPos+"-"; S*,rGCt'T httpConnection.setRequestProperty("RANGE",sProperty); w#g#8o>' Utility.log(sProperty); P';?YV0 @, W vvh %3$*K\Ai InputStream input = httpConnection.getInputStream(); Vb'7> //logResponseHead(httpConnection); Q;D0<Bv U_{Ux2 <!pvqNApg byte[] b = new byte[1024]; <bD>m[8, int nRead; EVNY*&p while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) L^{|uP15N { PtTH PAKj nStartPos += fileAccessI.write(b,0,nRead); 5=1^T@~#& //if(nThreadID == 1) D2,z)O%VK // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); wWp(yvz } =lVK IW +|ycvHd _BDK`D Utility.log("Thread " + nThreadID + " is over!"); +tD[9b!
m bDownOver = true; wW%4d //nPos = fileAccessI.write (b,0,nRead); *tAg*$ } gc?#pP catch(Exception e){e.printStackTrace ();} 3dDX8M? } kn/Ao}J74z } YXI'gn2b# l3IWoa&sh >(snII //打印回应的头信息 bl'z<S,
' public void logResponseHead(HttpURLConnection con) <~)kwq' { nYJTKU for(int i=1;;i++) l#}.^71+ { SC-
$B String header=con.getHeaderFieldKey(i); UDL
RCS8i if(header!=null) fhCc! \ //responseHeaders.put(header,httpConnection.getHeaderField(header)); &wB\ ~Ie- Utility.log(header+" : "+con.getHeaderField(header)); 1\r|g2Z
: else 9Fr3pRIJ break; po}F6m8bX } 6AWKLFMV } {N#KkYH{" DSj(]U~r UYz0PSV=. public void splitterStop() #-GJ&m8 { o^V(U~m] bStop = true; LB.co4 } "hQ_sgz[Z o'$jNciOW yA3wtm/? } 8Y#\xzod DU=dLE6-P; Tc+gdo>G /* 2"-S<zM **FileAccess.java ~%2pp~1K *//文件访问(定位,写) sIv)' package NetFox; `~W-Xx import java.io.*; wm+})SOX9 84{Q\c A%2:E^k(s public class FileAccessI implements Serializable{ mB0l "# F 1U,1)<z~u //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 QL$S4 J" RandomAccessFile oSavedFile; %xQ.7~ long nPos; .WQ+AE8Q oQL59XOT4 8+Td-\IMk public FileAccessI() throws IOException {vE(l' { aceZ3U>W this("",0); B7Tk4q\;Q } . ]8E7 n\ Hs@. sk|=% }y public FileAccessI(String sName,long nPos) throws IOException | 0,vQv { dCFlM&(i oSavedFile = new RandomAccessFile(sName,"rw"); ZY56\qcY this.nPos = nPos; d;+[i oSavedFile.seek(nPos); Zx$ol;Yd } NOS>8sy EbZdas!l 5p
+ZD7jK public synchronized int write(byte[] b,int nStart,int nLen) 3or\: { #YSF&*
int n = -1; &ciN@nJ|$z try{ S{K0.<,E oSavedFile.write(b,nStart,nLen); 8/"fWm/ n = nLen; q-Qxbg[>e } P6Mhbmt9* catch(IOException e) 7FF-*2@ { Eaqca{%/^ e.printStackTrace (); ?J,AB #+ } j.:h5Y^N
x3zj?- D\ H/ return n;
ayBRWT0 } AE@NOM7u "Y=+Ls(3o( >5
b/or } 5IKL#V`3a 5#E |R wJlX4cT4YV /* pN&c(=If **SiteInfoBean.java m~'? /!! */ D.%B$Y;G package NetFox; :L
3&FA sFDG) W~Z<1[ public class SiteInfoBean { a83g\c5 <*EZ@XoN> n$(p-po private String sSiteURL; //Site's URL b|5w]<?' private String sFilePath; //Saved File's Path auWXgkwZs/ private String sFileName; //Saved File's Name t]-uw-E private int nSplitter; //Count of Splited Downloading File _u}4j 9T Yif*"oO *U#m+@\0 public SiteInfoBean() ~3RC>8*Qw {//nSplitter的缺省值为5 ]Zf6Yw .Y //default value of nSplitter is 5 mNYl@+:psj this("","","",5); 0L^u2HZYL } _#_
E^! >ulY7~wUv #?B%Ja%
;W public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ~}DQT>7$ { /VHi> sSiteURL= sURL; T5O _LCIws sFilePath = sPath; NcM>{{8 sFileName = sName; bY~@}gC**@ this.nSplitter = nSpiltter; rx :z#"?I bqx0d=Z~[ l?*r5[O>n } ZlKw_Sq: 9PUes3"v W@\ (nfD2 public String getSSiteURL() MK}-<&v { NV r0M?`4 return sSiteURL; +{53a_q } "gW7<ilw
8%RI7Mg D,ly#Nn public void setSSiteURL(String value) OVk~N) { uENdI2EY8y sSiteURL = value; H
g5++.Bp } e1q"AOV 6 R \s!*) nF)uTk public String getSFilePath() [XlB<P=|> { DW(~Qdk return sFilePath; 0F;,O3Q } 1f(DU4h #:ns64| G"y.Z2$ public void setSFilePath(String value) PKq-@F%X { 8X&Ya = sFilePath = value; @o e\"vz } <1~^C %"A_!<n@*` [{&jr]w`| public String getSFileName() \0FT!}
L { ~9$X3.+ return sFileName; o'%eI } }PeZO!K 1q.(69M p D=w>" public void setSFileName(String value) tu%[p 4
{ >adV(V< sFileName = value; ")lw9t` } .+K
S` B>TSdn={> D!TZI public int getNSplitter() l*7?Y7FK { /owO@~G return nSplitter; g.Hio.fVd } ]y1fM0 tjv\)Nn' Q* O<@ public void setNSplitter(int nCount) v@u<Ww;=@ { O%1/r* nSplitter = nCount; q'(z #h,cv } {)K](S
~ } FE m=w2 {8NwFN. eXy"^xp^ /* XrN- 2HTV **Utility.java B/eaqJ */ PCfo package NetFox; :mv`\ _dU P7H ( Nf?\AK! public class Utility { LAZVW</ [>w%CY<Fd 5 d ;|=K public Utility() z \?UGxu} { t%+$"nP G?V"SU. QD<eQsvV } KAb(NZK ,{<p //线程睡眠 d\]O'U)s public static void sleep(int nSecond) Bh` IXu { v:d9o.h try{ Q~
0Dfow? Thread.sleep(nSecond); 68x}w
Ae } MTmO>V&O catch(Exception e) qa!RH]B3 { dbO# e.printStackTrace (); YBSl-G' } d\Jji 6W } (@]tG?I= +8^_D?*\n //日志 HZ\k-!2 public static void log(String sMsg) zk>h u<_ { |< N frz System.err.println(sMsg); NfF~dK| } koH4~m{ %D^bahf &`@M8-m#F public static void log(int sMsg) /4C`k=> { %ejeyc System.err.println(sMsg); 3Xdn62[& } R [9w } ex phe+b Kpg:yrc[' QHQj/)J8 /* %3,xaVN **TestMethod.java ?~)Ak`= */ 0>Fqx{!heq package NetFox; /2h][zrZ[. G?[-cNdk BW71 s public class TestMethod { .Z5[_'T $Sb@zLi) @)z*BmP public TestMethod() ;E's4jWq { ///xx/weblogic60b2_win.exe _0]QS4a][c try{ uL>:tb SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); @"8~Y|L93 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8_iHVc;< SiteFileFetch fileFetch = new SiteFileFetch(bean); t F/nah fileFetch.start(); .&(8(C } 4e/cqN6 catch(Exception e){e.printStackTrace ();} sV'v*
1| |#cAsf_{ 9cOx@c+/ } E$T(Qu<- A\C'dZ <N KnFQ)sX^ public static void main(String[] args) 73pC { yfq>, new TestMethod(); yjeL9:jH[ } 6J;i,/ky } 6!RikEAh 点击下载更多相关资料
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