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/*
CkV5PU **SiteFileFetch.java J%u,qF}h */ 'Qh1$X)R7a package NetFox; T-LX>* import java.io.*; kV+%(Gl8 import java.net.*; )dd1B>ej] 2
EWXr+IU. bp!Jjct public class SiteFileFetch extends Thread { Y}]-o9Rl ]h?q1
W cGg SiteInfoBean siteInfoBean = null; //文件信息Bean 4{@{VsXN long[] nStartPos; //开始位置 BsU}HuQZQ long[] nEndPos; //结束位置 N;']&f FileSplitterFetch[] fileSplitterFetch; //子线程对象 njc-=o long nFileLength; //文件长度 RR+{uSO,t boolean bFirst = true; //是否第一次取文件 H$+@O- boolean bStop = false; //停止标志 <D[0mi0 File tmpFile; //文件下载的临时信息 ]OtnekkK$ DataOutputStream output; //输出到文件的输出流 ]"&](e6* 4[(NxXH8M //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I>GBnx
L
public SiteFileFetch(SiteInfoBean bean) throws IOException rz0)S
py6 { en '""
w siteInfoBean = bean; wRvh/{xB //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =EYWiK77a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); u"uL,w
1- if(tmpFile.exists ()) [!De|,u(^ { 57~y 7/ 0 bFirst = false; ZTibF'\5N read_nPos(); D4b-Y[/" } f14^VTzP/# else RA!q)/+ { /5<= m: nStartPos = new long[bean.getNSplitter()]; P6&%`$ nEndPos = new long[bean.getNSplitter()]; egvb#:zW? } R
RE8|%p;B m"T}em# !E_Zh*lgm 9QaE)wt } ?ac4GA( /O5&)%N eP,bFc public void run() Wqkzj^;"G { Wqkb1~]#Y //获得文件长度 X$;&Mdo. //分割文件 |his8\C+x //实例FileSplitterFetch lLp,sNAj //启动FileSplitterFetch线程 :r@t ' //等待子线程返回 `%
QvCAR try{ 1~'jC8&J if(bFirst) xbBqR_H_ { cGiL9|k nFileLength = getFileSize(); *f3S tX if(nFileLength == -1) +J|H~` { pB4Uc<e System.err.println("File Length is not known!"); @)BO`;*$fF } WR3,woo else if(nFileLength == -2) `sCn4-$8 { ,sIC=V + System.err.println("File is not access!"); @AF<Xp{ } V^,eW! else gfs ;?vP { zGFD71=# for(int i=0;i<nStartPos.length;i++) i84!x%|P { <:V~_j6P0 nStartPos = (long)(i*(nFileLength/nStartPos.length)); tEL9hZzI } veHe
for(int i=0;i<nEndPos.length-1;i++) w`;HwK$ , { fz\Q>u'T nEndPos = nStartPos[i+1]; UXlZI'|He } puJB&u"4L nEndPos[nEndPos.length-1] = nFileLength; >v %js!`f } J09jBQ]R } y?&hA!x kzjuW =KUmvV*\ //启动子线程 a3>/B$pE fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :{#O for(int i=0;i<nStartPos.length;i++) odSPl{. >d { G0{Z@CvO' fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T#H^
}` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !uQT4<g nStartPos,nEndPos,i); 4/Y?e UQ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); J\r\_P@;c fileSplitterFetch.start(); ejlns
~ } +U2lwd!j // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "~5cz0
H3v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); N^dQX,j // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 54CJ6"q nEndPos = " + nFileLength); +bS\iw + // fileSplitterFetch[nPos.length-1].start(); V2ih/mh pY`$k#5 ts!tv6@ //等待子线程结束 .P$m?p# //int count = 0; ]:Gy]qkO //是否结束while循环 )Cl>% 9 boolean breakWhile = false; %+H _V1F 3l~+VBR_ BYB4-, while(!bStop) $G-<kC}8: { KGYbPty} write_nPos(); ?1D!%jfi Utility.sleep(500); BS*79heY breakWhile = true; $
]s^M=8 N<9 c/V y)fMVD"( for(int i=0;i<nStartPos.length;i++) 7a1o#O { ,7LfvZj4[ if(!fileSplitterFetch.bDownOver) B;r_[^ { 3'Y-~^ml| breakWhile = false; ^Hv&{r77 break; px<psR5 } Lw}-oE
!U } T82 `-bZ if(breakWhile) :QGkYJ break; oFj_o ^e8xg=8( -K 'UXoU1 //count++; 1ysfpX{= //if(count>4) -Cs( 3[ // siteStop(); nzC *mPX8 } uQIPnd(V ?>}p'{I Nvgi&iBh8 System.err.println("文件下载结束!"); i%-yR DIX } Q>, &@ catch(Exception e){e.printStackTrace ();} z2iMpZ } (oGYnN,2 }PBme'kP ENZym //获得文件长度 c!ZZMCs public long getFileSize() k( :Bl { rLsY_7! int nFileLength = -1; E`o_R=% try{ /_0B5,6R URL url = new URL(siteInfoBean.getSSiteURL()); iT}>a30]B HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); R iLl\S# httpConnection.setRequestProperty("User-Agent","NetFox"); '#7k9\ QPVi& *8_ i1cd9 int responseCode=httpConnection.getResponseCode(); ij$NTY=u if(responseCode>=400) I=kqkuW { ZaYiby@Ci processErrorCode(responseCode); g8Ex$,\, return -2; //-2 represent access is error ,Z~`aHhr } !T,<p
x4I!f)8Q |dgiW"tUm String sHeader; F9
r5 Z ] 0X|_bU wH ,PA: for(int i=1;;i++) Pvc)-A { <D.E.^Y //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !-lI<$S: //Utility.log(in.readLine()); N;3!oo4 sHeader=httpConnection.getHeaderFieldKey(i); z}[u~P, if(sHeader!=null) < o?ua} { juR>4SH if(sHeader.equals("Content-Length")) @D;K&:~|N { :qdyCsn2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !, BJO3& break; d_25]B( } 2 nyK'k } G<?RH"RZr else peVY2\1>R break; p& _Z}Wv } JTKS5r7? } 05 6K) E catch(IOException e){e.printStackTrace ();}
=`3r'c catch(Exception e){e.printStackTrace ();} l ms^|? y~+LzDV sWlxt q g Utility.log(nFileLength); )Z:-qH d~aTjf ArtY;.cg% return nFileLength; {'{}@CuA2 } mW"e }!iopu jA1S|gV //保存下载信息(文件指针位置) xRWfZ3E# private void write_nPos() B&_:20^y~ { \^(#b,k# try{ }rJqMZ]w output = new DataOutputStream(new FileOutputStream(tmpFile)); 6|EOB~| output.writeInt(nStartPos.length); BbX$R`f for(int i=0;i<nStartPos.length;i++) -9om,U`t { Tv|'6P // output.writeLong(nPos); MGF!ZZ\ output.writeLong(fileSplitterFetch.nStartPos); JP Dxzp output.writeLong(fileSplitterFetch.nEndPos); a?y ucA } _/:- -Z output.close(); WfO E I1 } z -?\b^ catch(IOException e){e.printStackTrace ();} ^VYR}1Mw catch(Exception e){e.printStackTrace ();} sccLP_#Z } .V!5Ui< |B(,53 aG7Lm2{c" //读取保存的下载信息(文件指针位置) Q,.dIPla private void read_nPos() @wXYza0|d { =#2%[kG q try{ NN7KwVg DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); - k0a((? int nCount = input.readInt(); D\G 8p; nStartPos = new long[nCount]; |KJGM1]G nEndPos = new long[nCount]; r3Ol?p for(int i=0;i<nStartPos.length;i++) aUMiRm- { cUug}/!I nStartPos = input.readLong(); !\'w>y7 nEndPos = input.readLong(); y;ey( } c\.)vH input.close(); 4M"'B A< } Ue9d0#9 catch(IOException e){e.printStackTrace ();} |}77'w : catch(Exception e){e.printStackTrace ();} glch06 } bD
v&;Z Ge)G.> c (1=@.srAzK private void processErrorCode(int nErrorCode) 3SY1>}(Y { {%wrx'< System.err.println("Error Code : " + nErrorCode); |~76dxU } I_B%F#X) @u+LF]MY z/j*zU
` //停止文件下载 /*g0M2+OZo public void siteStop() [ (Y@ { %Ok#~>c bStop = true; @w33u^ for(int i=0;i<nStartPos.length;i++) 9uxoMjR- fileSplitterFetch.splitterStop(); c*owP \&d1bq ]#N8e?b, } ;-i)}< } ~I")-2"B //负责部分文件的抓取 GB+$ed5@< **FileSplitterFetch.java V~Guw[RA */ Vb\^xdL> package NetFox; JSFNn]z2P Zq{gp1WC ~&,S xQT import java.io.*; m!INbIh import java.net.*; h9d*N 9!;M K
z^.v` "'+/ax[{ public class FileSplitterFetch extends Thread { A/ zAB3 yTc&C)Jba FS7D String sURL; //File URL >uJu!+# long nStartPos; //File Snippet Start Position UJS
vtD{g long nEndPos; //File Snippet End Position F`;q9<NYRW int nThreadID; //Thread's ID WG3_(mM boolean bDownOver = false; //Downing is over [g==#[ boolean bStop = false; //Stop identical .mnkV -m FileAccessI fileAccessI = null; //File Access interface 2kgSIvk\ -4Q\FLC'k fda2dY; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Y;\@
5TgQ, { a{e1g93} this.sURL = sURL; ZkibfVwe this.nStartPos = nStart; p>U= Jg this.nEndPos = nEnd; ,jnaa (n nThreadID = id; V%*91t _ fileAccessI = new FileAccessI(sName,nStartPos);//定位 r{*Qsaw } bz1`f >%l ~- aUw}U 2*W|s7cc public void run() uKY1AC__ { L{ej<0 yr while(nStartPos < nEndPos && !bStop) IM,d6lN6s { >z3l@ nr>Yj?la 0#5&* try{ ZXj*Vu$_4 URL url = new URL(sURL); h5vetci/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6R2F,b(_ httpConnection.setRequestProperty("User-Agent","NetFox"); MO1H?Uhx String sProperty = "bytes="+nStartPos+"-"; =BD|uIR httpConnection.setRequestProperty("RANGE",sProperty); RP^L.X(7^ Utility.log(sProperty); (Ms0pm-#t 75h]#k9\
?nJv f InputStream input = httpConnection.getInputStream(); TPj,4&| //logResponseHead(httpConnection); 8XCT[X ZP:+ '\&J D3O)Tj@:}( byte[] b = new byte[1024]; ^]/V-!j int nRead; '8^cl:X while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) iYW<qgz { `/G9*tIR8g nStartPos += fileAccessI.write(b,0,nRead); -lfbn=3 //if(nThreadID == 1) {rF9[S"h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }_}LaEYAo } c?Zi/7 DEPsud ; (nkiuCO Utility.log("Thread " + nThreadID + " is over!"); N7q6pBA"E bDownOver = true; B90fUK2g //nPos = fileAccessI.write (b,0,nRead); {\h:k\k } &`'@}o>2 catch(Exception e){e.printStackTrace ();} ?wIw$p>wT } bvl!^xO] } )|]*"yf:E nWd;XR6| z@<jZM //打印回应的头信息 {H=<5 public void logResponseHead(HttpURLConnection con) &j"_hFhv { i\>?b)a> for(int i=1;;i++) ^= kr`5 { '~{kR=+ String header=con.getHeaderFieldKey(i); 2/))Y\~
if(header!=null) 4?_^7(%p //responseHeaders.put(header,httpConnection.getHeaderField(header)); R<r,&X?m Utility.log(header+" : "+con.getHeaderField(header)); Fbw.Y6 else 7?y([i\y break; fndH]Yp } +}g6X6m } Rx@0EPV FZ FPzH Lu71Qdu09 public void splitterStop() D4{<~/oBv { I!Fd~g9I4 bStop = true; Vc8w[oS } B;<zA' 1 a 4?c~bs UD&pL'{s } ]~pM;6Pu0 |/u,6` 5^{2g^jH6 /* Sq`Zuu9t **FileAccess.java .;dI&0Z *//文件访问(定位,写) /i"1e:cK package NetFox; OP``+z> import java.io.*; WuQ;Da0+_F |QyZ:`0u XS>( Bu public class FileAccessI implements Serializable{ !H zJ* 2\"T& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 =Nz;R2{@ RandomAccessFile oSavedFile; =s:Z-*vy! long nPos; V|2[>\Cv 3'55!DE d263#R public FileAccessI() throws IOException )SaMfP1=v { =|V#~p* this("",0); Om8Sgy? } Rz<'&Z>; "!#KQ''R
yi<H }& public FileAccessI(String sName,long nPos) throws IOException q^}iXE~ { G,b*Qn5# oSavedFile = new RandomAccessFile(sName,"rw"); cj|Urt this.nPos = nPos; EiPOY' oSavedFile.seek(nPos); C jz(-018 } nKch:g {T5u"U4 }(#;{_ public synchronized int write(byte[] b,int nStart,int nLen) /9ZU_y4&3f { ,/eAns`ZU int n = -1; cZ,}1?! try{ Cv<
s| oSavedFile.write(b,nStart,nLen); e'3y^Vg n = nLen; K{iC'^wP } %\1W0%w catch(IOException e) O~5*X f { ,UxAHCR~9 e.printStackTrace (); *3(mNpi{_ } T?*f}J 5~RR
_G qKI)*o062 return n; vSo,,~F } nz/cs n nR,QqIFFw }Rq{9j,% } /kqa|=-`q xH>j 4@9xq<<5 /* eY`o=xN **SiteInfoBean.java Hw,@oOh. */ l-8rCaq&J package NetFox; {Ok]$0L -=2V4WU~ -T>i5'2) public class SiteInfoBean { +DYsBCVbag 8)YDUE%VH Eg_ram`\R private String sSiteURL; //Site's URL iE^=Vf; private String sFilePath; //Saved File's Path O0sLcuT$ private String sFileName; //Saved File's Name vSwRj<|CF private int nSplitter; //Count of Splited Downloading File ;IR.6k$; ,b t
j6hg rb]?"lizi public SiteInfoBean() |}o3EX {//nSplitter的缺省值为5 /PE L[Os //default value of nSplitter is 5 :CP,DO this("","","",5); ka*#O"}L8 } FlT5R*m WIw*//nw 5p~hUP]tT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;eW\41 w { 5 i=C?W`' sSiteURL= sURL; 5a5)hmO RB sFilePath = sPath; T1(*dVU? sFileName = sName; kTm}VTr
1 this.nSplitter = nSpiltter; C ~04#z_$ A(+%DZ aqv'c
j> } [=^Wj`; Yb%#\.M/y FQ u c}A public String getSSiteURL() U,Fyi6{~ { rXq{WS` return sSiteURL; U.N?cKv } 0CK3jdZ+X /z: mi =G`g-E2 public void setSSiteURL(String value) dEZlJo@J { XmN8S_M>v sSiteURL = value; ;KT5qiqYH } &W{v(@ ~,.;2K73 #g<6ISuf public String getSFilePath() k&17 (Tv$ { P[tYu: return sFilePath; TrBW0Bn>p } U|x#'jGo' H^M>(kT#& Cl!9/l?z public void setSFilePath(String value) mB"1QtD { 1o?uf,H7O sFilePath = value; 0!M'z } >+):eBL T@a|*.V e/}4Pt public String getSFileName() 5t-,5 { S:1g(f*85 return sFileName; ,(NN)Oj } h=B=
J >~_)2_j -B?cF9 public void setSFileName(String value) aP#/% { Q"H/RMo- sFileName = value; L2OR<3*|Av } z, n[}Q#u hw=~%f; &d\ y:7 public int getNSplitter() *q+X?3 { d{Owz&PL return nSplitter; A#Y:VavQ? } OsKtxtLO [pInF
Qh6 %*#+(A"V public void setNSplitter(int nCount) `@#rAW D { b7B|$T, nSplitter = nCount; nlA:C>= } ',/2J0_ } Y(R.<LtY $=) Pky-~ {(I":rt# /* nu(7YYCM$ **Utility.java o=Y'ns^a( */ ]J@-,FFC package NetFox; D"%> Fm*npK QNH3\<IS public class Utility { z"Mk(d@-E m"QDc[^Ge Xt
+9z public Utility() Q!_d6-*u { (>NZYPw^3 aemi;61T\ +}PN+:yV } Je}0KW3G9L +wxsAGy_j //线程睡眠 c94=>p6 public static void sleep(int nSecond) p}<60O"r$ { o4wSt6gBcJ try{ jcb&h@T8kv Thread.sleep(nSecond); |gIE$rt-~W } fH$#vRcq catch(Exception e) mhy='AQJ { _
j`tR: e.printStackTrace (); SZ}=~yoD( } k81%$E } 5DVYHN9c| V@[C=K //日志 {Wu[e,p public static void log(String sMsg) n4y]h { fP\q?X@]E System.err.println(sMsg); 8KYI Hw } )]s<Czm% 52zE -SY i1!1'T8 public static void log(int sMsg) [:cvy[}v@ { =E<H_cUS System.err.println(sMsg); }pIn3B) } D
<R_eK } 9\c]I0)3p 2`TV(U@ M:b#">M /* =4l @A> **TestMethod.java )BvMFwQG */
Hf\sF(, ( package NetFox; kguZ AO6 +@~WKa %S'+x[4W public class TestMethod { Fj]06~u q=Vh"]0g ixSr*+ public TestMethod() =*"8N-FU { ///xx/weblogic60b2_win.exe ]Yw$A try{ ~UZ3 lN\E SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &*%x]fQ@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); tW/g0lC% SiteFileFetch fileFetch = new SiteFileFetch(bean); 8|)^m[c& fileFetch.start(); @XXPJq;J } WgqSw%:$H catch(Exception e){e.printStackTrace ();} m\X\Xp~A J=k=cFUX
-0x Q'1I } x7U=1y( XbB(<\0+ iER@_? public static void main(String[] args) tH44\~ { >6HGh#0(p new TestMethod(); ;RRw-|/Wm } zQG{j\ } zX4RqI 点击下载更多相关资料
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