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/* :{AN@zC0\ **SiteFileFetch.java Mfz5:' */ IX>|bA; package NetFox; Y.73I83-j import java.io.*; 3LTO+>, |" import java.net.*; Q\rqG 8t^"1ND hh?'tb{ public class SiteFileFetch extends Thread { ,S8Vfb & ysa"f+/ 6RF01z|~_ SiteInfoBean siteInfoBean = null; //文件信息Bean ENmo^O#,u long[] nStartPos; //开始位置 e}?t[aK4# long[] nEndPos; //结束位置 ~\/ J& FileSplitterFetch[] fileSplitterFetch; //子线程对象 y#MLxm long nFileLength; //文件长度 a=J?[qrx boolean bFirst = true; //是否第一次取文件 CVUDN2 boolean bStop = false; //停止标志 A1@-;/H3 File tmpFile; //文件下载的临时信息 -Rvxjy)[N DataOutputStream output; //输出到文件的输出流 .d fTv/n 226s:\d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &l.^UQ public SiteFileFetch(SiteInfoBean bean) throws IOException @N(jd($E { Dxe|4"%^ siteInfoBean = bean; /}VQzF //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); she`_'?5 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); r" D |1 if(tmpFile.exists ()) \xdt|:8 { xvkof
'Q) bFirst = false; yO6i "3 read_nPos(); u7;A` } i~.[iZf| else F>M$|Sc2 { 5[3hw4 nStartPos = new long[bean.getNSplitter()]; GW W@8GNI nEndPos = new long[bean.getNSplitter()]; 4 hj2rK'y } VgdkCdWRm_ ]`NbNr]K *Z]|
Z4Q/` GWhZ Mj } i-<=nD&?t A`r9"([-A Ao\Vh\rQkq public void run() 8x{vgx @M { wv7jh~x(4 //获得文件长度 ~;+vF-]R //分割文件 Y1~SGg7(@ //实例FileSplitterFetch =j{jylC //启动FileSplitterFetch线程 H>r-|*n //等待子线程返回 Wf?sJ`.%b try{ U\[V !1O if(bFirst) 4A&e+kz&:R { {$t*Mb0 nFileLength = getFileSize(); gB"Tc[l1 if(nFileLength == -1) (HF,p,h_ { epL[PL} System.err.println("File Length is not known!"); EH3G|3^xz } yI%>
w4Z else if(nFileLength == -2) EzyIsp> _ { G225Nz;Y* System.err.println("File is not access!"); <8bO1t^* } ~
/[Cgh0 else CvW((<? { +wSm6*j7= for(int i=0;i<nStartPos.length;i++) iF0a { K8Y/XEK nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5 QeGx3' } jysV%q 3 for(int i=0;i<nEndPos.length-1;i++) Dmi;# WY { >SJ$41"E nEndPos = nStartPos[i+1]; ]~zJ7I } n96gDH* nEndPos[nEndPos.length-1] = nFileLength; Fs|;>Up0 } YUb,5Y0 } L,Nr,QC- z|<oxF. ]Yu+M3Fq //启动子线程 V[M#qZS fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; acZHb[w for(int i=0;i<nStartPos.length;i++) l!y
_P { D5>~'N3b fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (0Qq rNs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), J9FNjM[qe nStartPos,nEndPos,i); 5jQP"^g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Fdw[CYHz fileSplitterFetch.start(); FNM"!z } _e_%U<\4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eh>E). siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $te,\$&} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 48Lmy<}* nEndPos = " + nFileLength); (3h*sd5ly // fileSplitterFetch[nPos.length-1].start(); }Yl=lcvw E?mp6R]}% gL"}5 3A //等待子线程结束 `Cf
en8 //int count = 0; Y/66`&,{ //是否结束while循环 g)A0PvEu boolean breakWhile = false; ug,|'<G+ I
6YT|R "V0:Lq while(!bStop) }?J5!X { #6jwCEo=V write_nPos(); &] 6T^. Utility.sleep(500); --YUiNhh breakWhile = true; mJ>99:W+ (VAL.v* j2 ^T:q[ for(int i=0;i<nStartPos.length;i++) l&Ghs@>Kl { Vk_&W.~ if(!fileSplitterFetch.bDownOver) t)Q@sKT6 { ('-}"3 breakWhile = false; X9A[
break; |a$w;s>\ } Z{4aGp* } AdW2o|Uap if(breakWhile) rOHW break; (y=o]Vy FTnQqDuT [0ffOTy //count++; Ju7C?)x //if(count>4) $cK
B+} // siteStop(); zZc@;S# } Qz(T[H5%W qetP93N_* fsc~$^.~\ System.err.println("文件下载结束!"); DIp:S&q2 } "ue$DyN catch(Exception e){e.printStackTrace ();} #Rx"L&3Ue } wLN2`ucC ZV]e- Fg\| e% //获得文件长度 >DUE8hp;< public long getFileSize() Hq\E06S@ { M|#5gKXd int nFileLength = -1; Z) i1?# try{ ([CnYv URL url = new URL(siteInfoBean.getSSiteURL()); x<j"DS}S)D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?U/Wio$@ httpConnection.setRequestProperty("User-Agent","NetFox"); `6N-MsP Y+u-J4bj UxcDDa/j2T int responseCode=httpConnection.getResponseCode(); {dA
~#fW< if(responseCode>=400) B H0#Q5 { ho]!G498 processErrorCode(responseCode); MupW=3.38 return -2; //-2 represent access is error C$td{tM } 7;}3{z #G+ -Bo~"q String sHeader; hRa(<Z K #f3 ;}1( KCh for(int i=1;;i++) Mev-M2A { zt[4_;2Y //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +:]Aqyc\ //Utility.log(in.readLine()); EPe]-C` sHeader=httpConnection.getHeaderFieldKey(i); '<&EPUO if(sHeader!=null)
X'#$e{ { B.mbKntK)R if(sHeader.equals("Content-Length")) aDl,
K;GL { g{W6a2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); blfE9Oy break; {pe7]P? } HCx%_9xlm } B>|U-[A else 8gbm "! break; B3>Uba*-)} } \l]pe|0EW } 'y6!%k* catch(IOException e){e.printStackTrace ();} {y&\?'L' catch(Exception e){e.printStackTrace ();} Y%)h)El
@nx}6?p\, 9Z0CF~Y5 Utility.log(nFileLength); 9]L! . [7e{=\`= 02W4-*) return nFileLength; xZP >g } bwSRJFqb 5hJYy`h~ 0Z
A#T:4 //保存下载信息(文件指针位置)
'9 *|N= private void write_nPos() &:DCtjK { y*}vG}e% try{ DN"S, output = new DataOutputStream(new FileOutputStream(tmpFile)); (K*/Vp output.writeInt(nStartPos.length); (~G5t(+ for(int i=0;i<nStartPos.length;i++) Gf
H*,1x { ii_|)udz // output.writeLong(nPos); :m*!?QGdL output.writeLong(fileSplitterFetch.nStartPos); G9i)nWr output.writeLong(fileSplitterFetch.nEndPos); Db#W/8
a8k } fVH*dX'Jz output.close(); [ZKtbPHb } GX7 eRqz > catch(IOException e){e.printStackTrace ();} 2q-:p8 catch(Exception e){e.printStackTrace ();} bB;~,W&E1 } (ET ;LH3 @ .Z[M +~w?Xw, //读取保存的下载信息(文件指针位置) <V$Y6(uMs private void read_nPos() :dY.D|j* { `;5VH ]V try{ "%oH@
= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _K0izKTA. int nCount = input.readInt(); HPtTv}l nStartPos = new long[nCount]; "Ju/[#VCJ nEndPos = new long[nCount]; !F+|Y"c for(int i=0;i<nStartPos.length;i++) U|Bsa(?nx {
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nStartPos = input.readLong(); ;wJ7oj< nEndPos = input.readLong(); smfG,TI } #~H%[s a input.close(); Uz6{>OCvk| } c~gNH%1XN catch(IOException e){e.printStackTrace ();} 'v\1:zi catch(Exception e){e.printStackTrace ();} &/>;LgN } 0" U5oP[ xvwD3.1 ),cQUB private void processErrorCode(int nErrorCode) (s}Rj)V[^ { DKy>]Hca System.err.println("Error Code : " + nErrorCode); ~\IF9! } $ \Q<K@{ /h}P Eu3y I.^X 2 //停止文件下载 k4qLB1&, public void siteStop() z5XYpi_;[ { _M8G3QOx bStop = true; Z/2,al\ for(int i=0;i<nStartPos.length;i++) 3]O`[P,*% fileSplitterFetch.splitterStop(); IL~]m?'V( P0%N
Q1bn n-b>m7O( } k{gl^ } 7?6xPKQ)H //负责部分文件的抓取 e[x?6He,$ **FileSplitterFetch.java A Gv!c($ */ 0+T*$=? package NetFox; ZYE' C \%sPNw=e &Ki>h import java.io.*; DMF?5GX import java.net.*; J[e} PD6MyW05%9 T ;i?w public class FileSplitterFetch extends Thread { |-~b$nUe 0LetsDN7I K :1g" String sURL; //File URL oM6j>&$b long nStartPos; //File Snippet Start Position ^cYStMjpy long nEndPos; //File Snippet End Position h&)fu{ int nThreadID; //Thread's ID 3jvx2 boolean bDownOver = false; //Downing is over r5t;'eCea boolean bStop = false; //Stop identical _*O7l FileAccessI fileAccessI = null; //File Access interface 3p:=xL Z5((1J9 jCU=+b= public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \Dn&"YG7 { B4`2.yRis this.sURL = sURL; qBT_!
)h
this.nStartPos = nStart; &MCy.(jN this.nEndPos = nEnd; L +L9Y} nThreadID = id; ;tJWOm fileAccessI = new FileAccessI(sName,nStartPos);//定位 T"n{WmVQ } -glugVq Rw{$L~\ IikG/8lP public void run() V?OuIg%=: { :1:3Svb<Y while(nStartPos < nEndPos && !bStop) 8]S,u:E:N { ~mtTsZc ~j=xi P 0CT}DQ._^N try{ AT"!{Y "H URL url = new URL(sURL); Vwjk[ DOL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ov8
ByJc httpConnection.setRequestProperty("User-Agent","NetFox"); ?Phk~ jE String sProperty = "bytes="+nStartPos+"-"; kW#S]fsfU httpConnection.setRequestProperty("RANGE",sProperty); q[-|ZA bbr Utility.log(sProperty); n'THe|:I 9/#0?(K8 1o8wy_eSs InputStream input = httpConnection.getInputStream(); 0s1'pA' //logResponseHead(httpConnection); G3G/xC" e|yX QTlvL J0=7'@(p byte[] b = new byte[1024]; UcgG int nRead; rVY?6OMkd while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) t{!/#eQC { 1j11|~ nStartPos += fileAccessI.write(b,0,nRead); VM7 !0 //if(nThreadID == 1) $H'8
#:[d_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^7.XGWQ)- } 1n_;kaY AIb>pL{ tE@FvZC'= Utility.log("Thread " + nThreadID + " is over!"); l';pP^.q bDownOver = true; <j;]!qFR //nPos = fileAccessI.write (b,0,nRead); ',GV6kt_k } o7.e'1@ catch(Exception e){e.printStackTrace ();} T.kyV| } kBo;h.[l } -LTKpN`[@ wzd`l?o, ndw7v //打印回应的头信息 ;+sl7qlA4 public void logResponseHead(HttpURLConnection con) xOythvO { t-WjL@$F/ for(int i=1;;i++) 6Opa{] { r088aUO
P String header=con.getHeaderFieldKey(i); ^5>s7SGB" if(header!=null) F+m[&MKL //responseHeaders.put(header,httpConnection.getHeaderField(header)); b(l0js Utility.log(header+" : "+con.getHeaderField(header)); C6|(ktt else uVGa(4u} break; [& ^RP,N~ } X1oGp+& } Oa!
m
|m)kN2w K/^
+eoW( public void splitterStop() WfZF~$li` { C ZJV_0 bStop = true; :$?Q D } wd/G|kNO 3Hw[s0[$ ;FU|7L$H } }k7_'p&yk YGp)Oy}: f8=]oa] /* 6W&_2a7* **FileAccess.java ?1peF47Z *//文件访问(定位,写) zPR8f-U vw package NetFox; %m eLW& import java.io.*; ?DPHo)w Z.'syGuV iCP~O public class FileAccessI implements Serializable{ Pz%~ST a[sKE? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RP!
X8~8 RandomAccessFile oSavedFile; )u*^@Wo long nPos; GKZN}bOm\ ?iv=53<c# hJf2o public FileAccessI() throws IOException E=AVrv5T { jZd}OC< this("",0); n*<v]1 } .po>qb6 xzm@
v( )6-9)pH@) public FileAccessI(String sName,long nPos) throws IOException [ ny6W9 { ZSB?Y1wG oSavedFile = new RandomAccessFile(sName,"rw"); l+[czb~ this.nPos = nPos; 71"+<C . oSavedFile.seek(nPos); ]a?bzOr, } $shp(T,q X:EEPGE 7C7>y/uS public synchronized int write(byte[] b,int nStart,int nLen) 7O)" ` { FOH@OY int n = -1; 6ZOy&fd,Ty try{ 1$pb (OK oSavedFile.write(b,nStart,nLen); bcH_V|5} n = nLen; <{Q'&T } s_[VHPN catch(IOException e) 0 )}$^TV { 7 ^$; e.printStackTrace (); D#Kuo$ } QR0(,e$Dl h/)_)
r.x asVX82< return n; hH>``gK } G$bJ+ !yJICjXj wRvb8F0 } 3@<zg1.9- 0N;%2=2_E DHw<%Z-J /* W0I4Vvh_" **SiteInfoBean.java 8)j@aiF` */ eE(b4RCM package NetFox; 7TX2&kMoc xZ .!d.rn np9dM public class SiteInfoBean { MYdO jcN `<frgXu64 [f/I2 private String sSiteURL; //Site's URL F<|t\KOW private String sFilePath; //Saved File's Path B^v8,;jZT private String sFileName; //Saved File's Name 8sOQ9 private int nSplitter; //Count of Splited Downloading File O;uG?.\ ,$lemH1d i=S~(gp public SiteInfoBean() "ju'UOcS/ {//nSplitter的缺省值为5 iE].&>w //default value of nSplitter is 5 F@YKFk+a this("","","",5); j;0vAf } sG7u}r eWs&J24 ?C-Towo=i public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 78 f$6J q { kz}R[7
sSiteURL= sURL; U7h(`b sFilePath = sPath; B1!kn}KlL{ sFileName = sName; x;s0j"`Jb this.nSplitter = nSpiltter; 0#_'o , i3$$,W! fyknP)21I } Lgk dT|vYK}\ I\O\,yPhhP public String getSSiteURL() 3uWkc3 { 4?\:{1X= return sSiteURL; 49H+(*@v@ } !69&Ld #W>QY Tp <AH1i@4 public void setSSiteURL(String value) +Vb8f["+- { ^D%Za' sSiteURL = value; zP\7S}p7% } R%Y`=pK>} GLMm( PNs~[ public String getSFilePath() =FP0\cQ. { 4GdX/6C. return sFilePath; 58Xzup_" } e'%v1-&sP "qz3u`[o rwLAW"0Qz public void setSFilePath(String value) (V`Md\NL` { i%m"@7.kk sFilePath = value; W,5Hx1z R } W !w, f; XRx+Dddt; T;TA7{B public String getSFileName() @gC=$A# { Rhc-q|Lz8 return sFileName; FY{e2~gi } CC=d I Mn1Pt|_@! aT!'}GjL public void setSFileName(String value) *g}Yw { YHkcWz sFileName = value; E>'a,!QPv } c/N@zum,{ "5R~(+~<@ \MC-4Yz public int getNSplitter() EP'h@zdz { \>LnLH( return nSplitter; L!0OC''C } ULrr=5&8 !* Ti}oIo& g9D^) V public void setNSplitter(int nCount) 9vUO*D { !U9|x\BqJ2 nSplitter = nCount; h,aA w#NE* } ryF7 } f"7O "6 VVH.2&`I Unj.f>U /* voP7"Dl[ **Utility.java wN1niR' */ |8>3`w! package NetFox; [[PEa-992 poGc a1 !tfb*@{;' public class Utility { IW 21T |(5W86C,ju kpL@P oQ/r public Utility() FuI73 { *f&EoUk}F {!6/x9> |8mhp.7 } t@u7RL*n:< w(kf //线程睡眠 pyLRgD0
g public static void sleep(int nSecond) #e'
}.4cr { -F'b8:m try{ 8Ac)'2t;U Thread.sleep(nSecond); Bm&kkx.9P } ~|<WHHN( catch(Exception e) \fA{1 { bM8If" e.printStackTrace (); mPI8_5V8] } 0/S_e)U } hxCvk/7sT 'smWLz} //日志 8} =JKR^cK public static void log(String sMsg) nF6q7 { nKW*Y}VO System.err.println(sMsg); x77l~=P+! } !vG'J\*xc WVVJ f|O{#AC public static void log(int sMsg) o-}R?> { :ba5iMa System.err.println(sMsg); 2M#r] } 3nZo{p:E } ,%\o4Rc'o \
[a%('} sR/b$j>i3 /* bh^LIU **TestMethod.java ,-7R(iMd */
=-_B:d; package NetFox; %f($*l. jqPkc28 =bEda] public class TestMethod { I\YV des# PO6&bIr m0v:\?S: public TestMethod() |V<h=D5W { ///xx/weblogic60b2_win.exe 035rPT7-2- try{ v|U(+O SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ZDbc //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); M5xCC! SiteFileFetch fileFetch = new SiteFileFetch(bean); 2W4qBaG$= fileFetch.start(); JV;OGh> } ]T%rjsN catch(Exception e){e.printStackTrace ();} 4:U?u BJ% eZ. !
u:Weoz } qUly\b 47 e^.Fa59 `Od5Gh public static void main(String[] args) )/z@vY { Mn)@{^ new TestMethod(); mdRU^n } =$]uoA } r$2P;Cxj 点击下载更多相关资料
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