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/* T|6a("RL **SiteFileFetch.java jfqopiSi */ ~appY Av package NetFox; /QJ?bD#a import java.io.*; ~B(6+~%
import java.net.*; &kpwo ) EEW_gFn jNC4_q& public class SiteFileFetch extends Thread { y? co| 2TA*m{\Hr L5\WpM= SiteInfoBean siteInfoBean = null; //文件信息Bean eET}r24 long[] nStartPos; //开始位置 \(vY%DL1: long[] nEndPos; //结束位置 v 7x:dcV FileSplitterFetch[] fileSplitterFetch; //子线程对象 N~xLu8, long nFileLength; //文件长度 $81*^ boolean bFirst = true; //是否第一次取文件 )d>!"JB- boolean bStop = false; //停止标志 PKzyV ; File tmpFile; //文件下载的临时信息 5hy""i DataOutputStream output; //输出到文件的输出流 J`^I./ oo.2Dn6z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) eh5gjSqx public SiteFileFetch(SiteInfoBean bean) throws IOException 0p\@!Z H { I2nhqJy^ siteInfoBean = bean; I'0@viF"Nx //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9uQ 4u/F tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); IyLx0[:U if(tmpFile.exists ()) @$+ecaVW { qhz]Wm P bFirst = false; Z LD}a:s read_nPos(); >:|q&|x- } <|Pun8j else ez6EjUk { ;y2/-tL? nStartPos = new long[bean.getNSplitter()]; d:U9pC$ nEndPos = new long[bean.getNSplitter()]; [`):s= FC } GHeVp/u 1OF&
* E3iW-B8u8 A`}rqhU.{- } ^:Gie \<)9?M : 4zo5}L`Y public void run() %V ;? { E!P yL>){ //获得文件长度 y7i*s^ys{ //分割文件 K]9"_UnN //实例FileSplitterFetch =HlQ36;* //启动FileSplitterFetch线程 X]dwX%:Z!j //等待子线程返回 w2'f/ try{ pn5Q5xc if(bFirst) hBX!iukT|{ { LmnymcH nFileLength = getFileSize(); @ >U-t{W if(nFileLength == -1) KSNPkd6 { "PpN0Rr System.err.println("File Length is not known!"); mA=i)Ga } Oal3rb else if(nFileLength == -2) *=*AAF { z21|Dhiw& System.err.println("File is not access!"); 9c6gkt9eB } D'Y-6W3 else m-*hygkcDu { ]f({`&K5 for(int i=0;i<nStartPos.length;i++) ]&pds\ { 0ok-IHE< nStartPos = (long)(i*(nFileLength/nStartPos.length)); vTx2E6 } ikSt"}/hd for(int i=0;i<nEndPos.length-1;i++) -xA2pYz" { PJL=$gBgKk nEndPos = nStartPos[i+1]; Rw:*'1 } HEM9E&rL nEndPos[nEndPos.length-1] = nFileLength; }=]M2} } 3S}Pm2D2 } tyqT ?pB>0b~3- 4Q6mo/=H //启动子线程 d*%`!G fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &?yZv{ for(int i=0;i<nStartPos.length;i++) VQS~\:1 { I\$X/t +dH fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), cbT7CG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), K%RxwM nStartPos,nEndPos,i); #a8B/- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
VN\W]jT fileSplitterFetch.start(); (j3xAA } suzZdkMA // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 65aK2MS@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); %YC_Se7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1BpiV-]=
nEndPos = " + nFileLength); hj.a&% // fileSplitterFetch[nPos.length-1].start(); ?3.b{Cq{- /VN f{p ]33>m|?@ //等待子线程结束 ^>hW y D //int count = 0; lUvpszH= //是否结束while循环 zp%Cr.)$ boolean breakWhile = false; TO?R({yx* 7OJ'){R$ Gf<'WQ[ while(!bStop) ikvWh<=>H { r 0iK write_nPos(); l)&X$3? tz Utility.sleep(500); esMX-.8Cx breakWhile = true; ap+JQ@b s pp f ~2QR{; XQ for(int i=0;i<nStartPos.length;i++) }%_ b$ { \}"$ ?d'f if(!fileSplitterFetch.bDownOver) ~U@;gLoD { n4R(.N00 breakWhile = false; io-![^{ break; LH8 fBhw } J2xw) + } ~ijVmWNk if(breakWhile) [Q/TlO t5 break; ov_j4j>6P j;-1J_e5 ? -dX`n //count++; ;E3>ay6m8 //if(count>4) <?riU\-]y // siteStop(); $4 S@ } [nrYpb4 dE4L=sTEsy sE Q=dcK System.err.println("文件下载结束!"); 3 +G$-ru } U<_3^ catch(Exception e){e.printStackTrace ();} =pS5uR~ } 5',8 ziJQ )W;o<:x3 G <i@ 5\# //获得文件长度 @W[f1 public long getFileSize() ?7.7`1m!v { eQp4|rf int nFileLength = -1; KmA;HiH%J try{ yl7&5)b#9 URL url = new URL(siteInfoBean.getSSiteURL()); 0c<.iM HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d\R,Q httpConnection.setRequestProperty("User-Agent","NetFox"); %)/P^9I6 ;kS&A( e}
P I^bc int responseCode=httpConnection.getResponseCode(); "J[K 3 if(responseCode>=400) |ZRagn30 { lFV N07hG
processErrorCode(responseCode); $ us]35Z3 return -2; //-2 represent access is error Af'" 6BS } LXC9I/j/ 7|$:=4 pEIRh1 String sHeader; GS a[
oh ;h*K }U `Nb[G)Xh for(int i=1;;i++) Kgi<UkFP { X[&Wkr8x ' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }NzpiY9 //Utility.log(in.readLine()); #t:S.A@ sHeader=httpConnection.getHeaderFieldKey(i); XBb~\p3y if(sHeader!=null) KLitg6&P { 8&?s#5zA if(sHeader.equals("Content-Length")) i]6`LqlO { ->g*</ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); '%dfzK*Z break; x,|hU@h } #><.oreXq } V-Sd[ else h?BFvbAt break; T"E6y"D } i+S)
K } YW_Q\|p]M catch(IOException e){e.printStackTrace ();} 1m:XR0 P catch(Exception e){e.printStackTrace ();} aTqd@},? V )x$|!( D6>2s\:>vp Utility.log(nFileLength); GVYBa_gx \]2]/=2tLd \Zqng return nFileLength; mpuq 9)6 } YaKeq5%y Tgm nG/Z M<.d8?p ) //保存下载信息(文件指针位置) QS` PpyBkd private void write_nPos() G~2jUyv { B8V>NvE~o try{ 4E]l{"k< output = new DataOutputStream(new FileOutputStream(tmpFile)); aWWU4xe output.writeInt(nStartPos.length); mKL<<L[ for(int i=0;i<nStartPos.length;i++) Li/O { rV R1wsaL // output.writeLong(nPos); Mc09ES output.writeLong(fileSplitterFetch.nStartPos); 5Iy;oZ output.writeLong(fileSplitterFetch.nEndPos); K]s[5 } C":32_q output.close(); Gb#Cm] } F+,~v- catch(IOException e){e.printStackTrace ();} }z _ catch(Exception e){e.printStackTrace ();} "$ Y_UJT7 } jkiFLtB@V {*0<T|<n ![YX]+jqNp //读取保存的下载信息(文件指针位置) @eD):Y private void read_nPos() tD(7^GuR { +cgSC5nR try{ OjJXysslXO DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); h|VeG3H int nCount = input.readInt(); <lw`
3aa( nStartPos = new long[nCount]; j9?}j#@ nEndPos = new long[nCount]; EQb7-vhg for(int i=0;i<nStartPos.length;i++) 3DiLk=\~ { wQP^WzNE nStartPos = input.readLong(); e vrXo"3 nEndPos = input.readLong(); [SHXJ4P* } %k-3?%&8 input.close(); ein4^o<f. } Kwefs;<E? catch(IOException e){e.printStackTrace ();} \Xm,OE_v" catch(Exception e){e.printStackTrace ();} &]e'KdXF } s2'yY(u/ q>$ev)W DnCP
aM4% private void processErrorCode(int nErrorCode) iYORu3 { AsAT_yv# System.err.println("Error Code : " + nErrorCode); )6,de2Pb } yj;sSRT l6YtEHNG qq) rd //停止文件下载 I/d&G#:~ public void siteStop() x }\64 { k7?N ?7w bStop = true; 'Jt]7;04p for(int i=0;i<nStartPos.length;i++) ^?cz,N~ fileSplitterFetch.splitterStop(); !46RGU:I k9 "[H' WN{ 9 } cik!GA } Pz>s6 [ob //负责部分文件的抓取 !c}O5TI|# **FileSplitterFetch.java hd>aZ"nm1 */ _/uFsYC package NetFox; PD&\LbuG rai3<_W< Cdas P9"1 import java.io.*; y4*U6+ #. import java.net.*; A'q#I>j` C8[&S&<_< &Q;sSIc public class FileSplitterFetch extends Thread { Ss~;m']68 :=/85\P0SU i@P)a'W_ String sURL; //File URL p2n0Z\2 long nStartPos; //File Snippet Start Position @hJ%@( long nEndPos; //File Snippet End Position ';TT4$(m int nThreadID; //Thread's ID b8V~S'6VqO boolean bDownOver = false; //Downing is over C ~<'rO}| boolean bStop = false; //Stop identical c(:f\Wc3Z FileAccessI fileAccessI = null; //File Access interface @ zs'Y8 ^T ?RK"p c_-drS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException WFO4gB* { }4Tc this.sURL = sURL; AvxfI"sp this.nStartPos = nStart; 3HLNCt09 this.nEndPos = nEnd; Xf02"PXC nThreadID = id; : >6F+XZ
fileAccessI = new FileAccessI(sName,nStartPos);//定位 b7NM#Hb } &y3OR1_Sm* g .onTFwN lJu;O/ public void run() )2V: { eoai(&o0$ while(nStartPos < nEndPos && !bStop) (eCJ;%%k { }`W){]{kO ?&|5=>u2}$ *+j*{>E try{ dRj| g URL url = new URL(sURL); LV\DBDM HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xl6,s>ob httpConnection.setRequestProperty("User-Agent","NetFox"); giZP.C"0 String sProperty = "bytes="+nStartPos+"-"; M,/mE~ httpConnection.setRequestProperty("RANGE",sProperty); 3&u&x( Utility.log(sProperty); \@8+U;d n#q<`}u, *pAV2V(!23 InputStream input = httpConnection.getInputStream(); :bz}c48% //logResponseHead(httpConnection); [z9`)VIe eZ|%<Wpu |$Xl/)Oq byte[] b = new byte[1024]; >#hO).`C int nRead; FN\E*@>X= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) CjlKMbnBH { h3bff#<K nStartPos += fileAccessI.write(b,0,nRead); LXbP 2 //if(nThreadID == 1) t?}zdI(4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^.1c{0Y^0 } 7on.4/;M J4Nln AtdlZ Utility.log("Thread " + nThreadID + " is over!"); ]|MEx{BG- bDownOver = true; .Xce9C0SW //nPos = fileAccessI.write (b,0,nRead);
k\WR ] } 1#.>a$> catch(Exception e){e.printStackTrace ();} G'6@+$ppS } Qp/QaVQ+ } BRlT7grgq 2^^`n1?' 9?0^ap,T //打印回应的头信息 ``ou/Z public void logResponseHead(HttpURLConnection con) vg3=8># { _9=Yvc= for(int i=1;;i++) =bHD#o|R { [-\%4 String header=con.getHeaderFieldKey(i); XmEq2v if(header!=null) kuol rfGB //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;?8_G%va Utility.log(header+" : "+con.getHeaderField(header)); ^c&L,!_)H else Wn(6,MDUN break; kO|L bQ@=q } oW<5|FaN } 9\/xOwR \~fONBY {5F-5YL+> public void splitterStop() ^
q<v{_ { $e*ce94 bStop = true; m|{3),#V } ~C>?W[Y w+yC)Rmz F )W: } !{^PO<9 S4G^z}{_ @7?#Y|` /* DpUbzr41+k **FileAccess.java #7MUJY+
9 *//文件访问(定位,写) KTP8?Q"n0 package NetFox; cUvz2TK import java.io.*; `-3Ow[ m06ALD_ 3wC' r public class FileAccessI implements Serializable{ :.$3vaZ@ }[4r4 1[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~g5[$r-u-u RandomAccessFile oSavedFile; 8=gjY\Dp long nPos; M+w=O!dq ptU\[Tq *T5!{ public FileAccessI() throws IOException w]]8dz { UPG9)aF this("",0); DP3PYJ%+B } =~=*&I4Dp y *fDwd~ f}x.jxY? public FileAccessI(String sName,long nPos) throws IOException H^s<{E0< { n
p\TlUc oSavedFile = new RandomAccessFile(sName,"rw"); paKSr|O this.nPos = nPos; k}
| oSavedFile.seek(nPos); )pq;*~IBI } =5kY6%E7c Mz~M3$$9n OoA|8!CFa public synchronized int write(byte[] b,int nStart,int nLen) nv@8tdrc { ~c %hWt int n = -1; kic/*v\6@ try{ YgUvOyaQXf oSavedFile.write(b,nStart,nLen); 5u*-L_ n = nLen; no<
^f]33 } @>W(1mRi catch(IOException e) Z@]e{zO { .
r[Hu40p e.printStackTrace (); +f@U6Vv } cd$m25CxC a{
?`t| {TX]\ufG return n; z7Q?D^miy } NhaI<J kPF9Z "l (Q.waI } T>R0T{A 1T-8K
r .y@oz7T5 /* wPwXM! **SiteInfoBean.java *=+td)S/1 */ *# tJM.Z package NetFox; <8d^^0 <N_+=_ IE9XU9Kd public class SiteInfoBean { W9D86]3Y j(RWO E )5E$ private String sSiteURL; //Site's URL =jX8.K4] private String sFilePath; //Saved File's Path 1:f9J private String sFileName; //Saved File's Name Z|5?7v;h5 private int nSplitter; //Count of Splited Downloading File }M3fmAP} ,PWgH$+ v"OY 1<8 public SiteInfoBean() u%$Zqee {//nSplitter的缺省值为5 1oN^HG6O //default value of nSplitter is 5 J|w\@inQ this("","","",5); ^OstR`U3 } {j:hod@-:5 W!?7D0q PzA|t;* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ~~SwCXZ+b^ { >i5acuth sSiteURL= sURL; b0Kc^uj5 sFilePath = sPath; 0Sgaem` sFileName = sName; :yeq(oK, this.nSplitter = nSpiltter; {`K m_<Te! QrYpZZ; *
v75O7l } {a4z2"\A )0Me?BRp JWMpPzs public String getSSiteURL() N(y\dL=v { q^r#F#*1l return sSiteURL; 89wU-Aggq } oE(7v7iY Fl1;;F =
Wu
*+paQ public void setSSiteURL(String value) bZ|FnY}FB { UmQ?rS8d sSiteURL = value; 6bBB/yd } t=-SH^$SR |=$-Wu +eX@U;J,g public String getSFilePath() 4)U.5FBk
) { ?84
s4BpV1 return sFilePath; .R9IL-3fO } [BT/~6ovrZ Qt/8r*Oe Z| V`B ` public void setSFilePath(String value) 3AsT { z&{5;A}Q@ sFilePath = value; rxy&spX } U5He? 7LU}Iiv \'CDRr"uw public String getSFileName() 2EfF=Fm> { S6AU[ASY. return sFileName; XwlbJ=mf } aEWWFN 4( 1(e ;~\MZYs3m public void setSFileName(String value) SL;9Q[ { ~d6DD;`K sFileName = value; 3Ei5pX =g } 'ul~7h;n Ygl%eP%Z }C#;fp"L public int getNSplitter() opJMS6%r { bIEhgiH return nSplitter; tWoh''@# } GF5^\Rf E5N{j4\F ea~:}!-P public void setNSplitter(int nCount) OBP1B@|l$+ { bf!M#QOk? nSplitter = nCount; FDv+*sZ } sH?/E6 } FN%m0"/Z{t V`7FKL@" d\FJFMW*9 /* 5GPo*Qpl **Utility.java >$,y5 AJ& */ N1}={yF.fQ package NetFox; N~NQ6:R[ =?s3iP i![dPM public class Utility { [g Z"a* ty*@7g0k }-o{ASC# public Utility() y:h}z). { C,pJ`:P '^FGc lME)?LOI } /M*a,o zdEPDdB //线程睡眠 A6pjRxg public static void sleep(int nSecond) y:vxE8$Q { DANw1_X\ try{ P b]3&!a Thread.sleep(nSecond); pmFk50` } +ke1Cn'[ catch(Exception e) *mMEl]+ { =pznu+, e.printStackTrace (); pKjoi{
Z } \a=D } DVkB$2] v^_mFp-}\ //日志 {|yob4N public static void log(String sMsg) aKd+CO: { yin'vgQ System.err.println(sMsg); ^-a8V' } d'|,[p viAMr"z jOyvDY9\ public static void log(int sMsg) j$TwL; { ^_%kE%I System.err.println(sMsg); j*
*s^Sg } vUnRi=:| } !QT'L,_ PT5AA8F gt7VxZ /* ]Bm>-*@0N **TestMethod.java W(Uu@^ */ 4#'("#R package NetFox; *k1<:
@%e H-xFiF [F[K^xYTlg public class TestMethod { 1<<kA:d 7]%Ypv$ %c1#lEC2xN public TestMethod() S#-tOjU* { ///xx/weblogic60b2_win.exe F5 ]C{ try{ Z-B%'/. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); v*qQ? S //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); q;:6_Qr SiteFileFetch fileFetch = new SiteFileFetch(bean); 2EK%N'H fileFetch.start(); $
A9%UhV } f(eQ+0D catch(Exception e){e.printStackTrace ();} pMJ1v .y&QqxiE
rJ o"fx } /2m?15c+ Hku!bJ i"j(b|?e public static void main(String[] args) wM_
6{ { @Fpb-Qd" new TestMethod(); kGUJ9Du } vw)7 !/# } u?[ q=0.J7 点击下载更多相关资料
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