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/* 6R 1wn&8 **SiteFileFetch.java KTG:I@|C */ wr$cK'5ZL package NetFox; k^H0b\hYY import java.io.*; ydwK!j0y import java.net.*; FOOQ'o[} FX
HAZ2/\ rc;7W: public class SiteFileFetch extends Thread { (3
IZ {S5RK-ax L6|Hgrj -u SiteInfoBean siteInfoBean = null; //文件信息Bean =
n+q_.A long[] nStartPos; //开始位置 %`xV'2H long[] nEndPos; //结束位置 K&=1Ap FileSplitterFetch[] fileSplitterFetch; //子线程对象 RLdlz long nFileLength; //文件长度 )KSisEL boolean bFirst = true; //是否第一次取文件 :/o C:z\h boolean bStop = false; //停止标志 { 1+Cw?1d File tmpFile; //文件下载的临时信息 A",eS6 DataOutputStream output; //输出到文件的输出流 ]b4pI*:$I Ik`O.Q.} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F(Lb8\to\M public SiteFileFetch(SiteInfoBean bean) throws IOException 5;IT64&] { _PK}rr?"7O siteInfoBean = bean; $Y8>_6%+T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /xl4ohL$a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); .)LZ`Ge3F if(tmpFile.exists ()) 9{_8cpm4 { b;S6'7Jf9 bFirst = false; N]B)Fb read_nPos(); VZ\O9lD } ^oS$>6| else uQH%.A { }x*7l`1 nStartPos = new long[bean.getNSplitter()]; Ct4LkmD nEndPos = new long[bean.getNSplitter()]; lVP9= } 2>F\& KMUK`tbaI fv|]= e QB!jLlg( } PeO] lq "yg.hK` *8z"^7?^= public void run() [/
AIKZM< { I[}75:^Rt //获得文件长度 ?q\FLb%"7 //分割文件 %dEB /[ //实例FileSplitterFetch 7=}6H3|& //启动FileSplitterFetch线程 4HM;K_G%{ //等待子线程返回 +T9Q_e* try{ Fj
S%n$ if(bFirst) ,mB Z`X@N
{ =v.{JV# nFileLength = getFileSize(); he"L*p*H if(nFileLength == -1) O/mR9[} { r]v&t System.err.println("File Length is not known!"); &=YSM.G } Yl$X3wi else if(nFileLength == -2) m;dm|4L^ { Sa L"!uAk System.err.println("File is not access!"); +}P%HH]E/p } <"<Mbbp else 85'nXYN{d { Y=r!2u6r~ for(int i=0;i<nStartPos.length;i++) *R BV'b { )D;*DUtMVm nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~e{H#*f&1/ } bG"HD?A_ for(int i=0;i<nEndPos.length-1;i++) "jT#bIm { 1@xP(XS nEndPos = nStartPos[i+1]; %]!adro~ } F?9SiX[\ nEndPos[nEndPos.length-1] = nFileLength; Di> rO038 } 2:Q(Gl`<l } ;\qXbL7 P>(P2~$Y" qNxB{0(D //启动子线程 VevNG* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Fi4UaJ3K for(int i=0;i<nStartPos.length;i++) -p`L%xj\ { A?8\Y{FQ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *t(4 $ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), wO7t!35 nStartPos,nEndPos,i); 4 /'N|c. Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XV>@B $hu fileSplitterFetch.start(); 'Dath>Y= } }$&xTW_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6V1:qp/6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $e
}n // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", l'6d4
DZ nEndPos = " + nFileLength); z\T Lsx // fileSplitterFetch[nPos.length-1].start(); ^z~~VBv +6l]] *H 9[VxskEh //等待子线程结束 /1d<P! H //int count = 0; "UG
K8x //是否结束while循环 &J$##B boolean breakWhile = false; e"k/d< OX\$ nQ\o W\8Ln> while(!bStop) Z(e^ iH { ?qmp_2:WU write_nPos(); jnJZ#=) Utility.sleep(500); :U'Cor
H breakWhile = true; e)@3m. j+kC-U; 7C7>y/uS for(int i=0;i<nStartPos.length;i++) 7O)" ` { FOH@OY if(!fileSplitterFetch.bDownOver) w<NyV8-hL { booRrTS breakWhile = false; .TpsJXF break; M:n 6BC>t" } [/|zH'j: } =sgdkAYwP if(breakWhile) 2'|8Q\,:4Z break; QA?oJ_}y [=uIb._Wv eKG2*CV //count++; /Vww?9U; //if(count>4) =:=/Gz1 // siteStop(); `s"d]/85VW } d
~`V7B2Y g`0moXz [syj# System.err.println("文件下载结束!"); 3^,QIG } iPj~I catch(Exception e){e.printStackTrace ();} ^YlI>_3s } TQ]dW Z9K})47T gb" 4B%Hm //获得文件长度 -SCM:j%h public long getFileSize() ~F!,PM/ { H:QhrL+7_ int nFileLength = -1; Z>P*@S,6G try{ $_Nf-:D* URL url = new URL(siteInfoBean.getSSiteURL()); w0lT%CPx HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nh.32q] httpConnection.setRequestProperty("User-Agent","NetFox"); /M=3X|| *[}^[J
x /7"I#U^u/ int responseCode=httpConnection.getResponseCode(); [k<1`z3 if(responseCode>=400) {tiKH=&J { [}z,J"Un processErrorCode(responseCode); ZZxk]D< return -2; //-2 represent access is error :"1|AJo) } ]a'99^?\ /F)H\* u<xo/=Z String sHeader; =r2]uW9 I/6)3su% N2C7[z+l` for(int i=1;;i++) hz:pbes { M@et6aud;K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); L%"LlSg //Utility.log(in.readLine()); C[sh, sHeader=httpConnection.getHeaderFieldKey(i); 6gL-OJNo if(sHeader!=null) TrS8h^C { w_tJ7pz8T if(sHeader.equals("Content-Length")) pCi#9=?N { dT"hNHaf nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h^UKT`9vt break; #W>QY Tp } <AH1i@4 } +Vb8f["+- else GL$De,V break; X{xBYZv4 } #%0Bx3uM } KLW n?` catch(IOException e){e.printStackTrace ();} }_9,w;M$ catch(Exception e){e.printStackTrace ();} "R>FqX6FB =q7Z qP j=RRfFg) Utility.log(nFileLength); o\b- _E5"? {i0SS
]:M0Kj&h return nFileLength; :rMM4 } I#F!N6; w8S!%abl1 :Qt //保存下载信息(文件指针位置) 8,P-
7^ private void write_nPos() dP?Ge} { fxaJZz$o try{ "hxN !,DEZ output = new DataOutputStream(new FileOutputStream(tmpFile)); HBS\<} output.writeInt(nStartPos.length); 4`m~FNVS for(int i=0;i<nStartPos.length;i++) G2bDf-1ew { x!LQxoNF // output.writeLong(nPos); aT!'}GjL output.writeLong(fileSplitterFetch.nStartPos); nfSbM3D]h output.writeLong(fileSplitterFetch.nEndPos); nn/?fIZN4 } Hb} X-6N output.close(); H %JaZ?( } K.<.cJE catch(IOException e){e.printStackTrace ();} `]Fx.)C# catch(Exception e){e.printStackTrace ();} ygJr=_iA9 } JxE53ev i':ydDOOHA fWfk[(M'9 //读取保存的下载信息(文件指针位置) 2WX7nK;I private void read_nPos() TxjYrzC { nRL. ppUI try{ x+ncc_2n&D DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); M5nWVK7c int nCount = input.readInt(); )c n+1R nStartPos = new long[nCount]; (wIzat nEndPos = new long[nCount]; )a9 ]US^ for(int i=0;i<nStartPos.length;i++) >(uZtYM\j { y&}E~5O nStartPos = input.readLong(); *4+3ObA nEndPos = input.readLong(); x3jb%`o#! } %VYAd)gC input.close(); x-OA([;/ } poGc a1 catch(IOException e){e.printStackTrace ();} !tfb*@{;' catch(Exception e){e.printStackTrace ();} ;c~cet4 } S#)Eom?V @k[R/,#'[t F<>!kK/c private void processErrorCode(int nErrorCode) B~o\+n { 3bk|<7tl System.err.println("Error Code : " + nErrorCode); )[0T16 } f` =CpO* @KX
\Er (" LQll9 //停止文件下载 kt`nbm|aw public void siteStop() ];.pK { '!l1=cZD bStop = true; "k]CW\H6z for(int i=0;i<nStartPos.length;i++) d
;vT ~; fileSplitterFetch.splitterStop(); 6"Bic rY il|1a8M2~ |
N0Z-| } G!K]W:m } hX`}Q4(k //负责部分文件的抓取 C<KrMRWh^ **FileSplitterFetch.java B<j'm0a>B */ >e\9Bf_ package NetFox; 3a.kBzus :Y9NLbv f$NM M
>z import java.io.*; =t6z \WB import java.net.*; [2"<W!p T] 2q?;N \j&^aAp r public class FileSplitterFetch extends Thread { UnI48Y 7AYd!n&S 0-~\
W( String sURL; //File URL Fx-8M! long nStartPos; //File Snippet Start Position 9U$EJN_G long nEndPos; //File Snippet End Position ^G6RjJxqp8 int nThreadID; //Thread's ID ^i:`ZfA# boolean bDownOver = false; //Downing is over (aD_zG=k5 boolean bStop = false; //Stop identical 5:'hj$~|\1 FileAccessI fileAccessI = null; //File Access interface z9aY]lHY K~@Mg1R A&nU]R8S public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException gy&[?m6M= { W5SJ^,d)J this.sURL = sURL; &f&z_WU this.nStartPos = nStart; J_s>N this.nEndPos = nEnd; <.Nx[!'~&d nThreadID = id; G:zua`u[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 H54R8O$ } &|/| ''A) 5 ~TdD6} [Q=dCX9% public void run() 'fW6
.0fXa { bV ZMW/w while(nStartPos < nEndPos && !bStop) zN
[2YJ$ { eImn+_ N3 ,"B+r6}EF Iu$K i try{ lP<:tR~K URL url = new URL(sURL); -jMJAYj V HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G "73=8d httpConnection.setRequestProperty("User-Agent","NetFox"); =$]uoA String sProperty = "bytes="+nStartPos+"-"; 6`f2-f9%iq httpConnection.setRequestProperty("RANGE",sProperty); ">#wOm+ + Utility.log(sProperty); !Q#{o^{Y~ lT(oL|{#P K_dOq68_ InputStream input = httpConnection.getInputStream(); kT;S4B //logResponseHead(httpConnection); -wjN"g< 5}`_x+$%(` M)U{7c$c7 byte[] b = new byte[1024]; 3YVi"
k?2 int nRead; -|E!e.^7: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) OoWyPdC+P { $sEy%- nStartPos += fileAccessI.write(b,0,nRead); 'Fmvu //if(nThreadID == 1) o<N nV // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EVoEszR } /iX+ R@ 0{=`on; ,T2G~^0 Utility.log("Thread " + nThreadID + " is over!"); -;'1^ bDownOver = true; R)c'#St //nPos = fileAccessI.write (b,0,nRead); 3D2E?$dX } U~pV) J catch(Exception e){e.printStackTrace ();} P>Ez'C } J>\B`E } 92EWIHEWZ Z?\2F% }mAa}{_ //打印回应的头信息 rb|U;)C public void logResponseHead(HttpURLConnection con) [i]Ub0Dh7 { %"P,1&\^ for(int i=1;;i++) Dc_yM { @;'o2 String header=con.getHeaderFieldKey(i); C+TI]{t if(header!=null) P'`r //responseHeaders.put(header,httpConnection.getHeaderField(header)); \_lod kf Utility.log(header+" : "+con.getHeaderField(header)); Rj4|Q:XG else cJrmm2.0kD break; -4cXRv] } >(;{C<6|^ } /oriW;OF ;72T|e gXjV?"^kUl public void splitterStop() E160A5BTx { Vv ?-"\Z> bStop = true; Ry'= ke } _A=$oVe ~m$Y$,uH )gMG#>up@ } ~P@Q7T* ypy68_xyW 8|" XSN /* ;A*`e$ **FileAccess.java :3I@(k\PY *//文件访问(定位,写) #Y4=J
6 package NetFox; 1~PV[2a import java.io.*; ZSG9t2qlv 9<>wIl*T` }b-g*dn]5 public class FileAccessI implements Serializable{ 9pX&ZjYP- ,]d,-)KX8 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 f`;j:O RandomAccessFile oSavedFile; o}$EG long nPos; bdc&1I$ s#WAR]x0x bLwAXW2K+ public FileAccessI() throws IOException iB498t { 3J5!oF{H this("",0); 'JRvP!] } `tn{ei D8xmE2% 1 A\OC public FileAccessI(String sName,long nPos) throws IOException H(Z88.OM { MerFZd 1 oSavedFile = new RandomAccessFile(sName,"rw"); Gy6l<:; this.nPos = nPos; } x2DT8u oSavedFile.seek(nPos); fc
|GArL#} } aL&n[
o:_Xv.HRZo W`u[h0\c public synchronized int write(byte[] b,int nStart,int nLen) fyByz=pl { P3=W|81e int n = -1; ,=#F// try{ BYMi6wts oSavedFile.write(b,nStart,nLen); o<|P9#(U" n = nLen; }3OKC2K~ } W;,C_ catch(IOException e) s[w6FXt { ;oc&Hb e.printStackTrace (); "\3B^ e, } "t~ ;oy-#p>N% ])nPPf return n; Y4v|ko`l% } OR;uqV@ o}* hY"& MpF$xzh } %y@Hh= p{j.KI s7 [m|YWT= /* ~4 `5tb **SiteInfoBean.java U15H@h */ uLWh| package NetFox; E( Z8 mD^jd+ w .?:SD public class SiteInfoBean { WjlZ6g2i /N&CaH\;^$ a+%6B_|\ private String sSiteURL; //Site's URL :(M(>4t private String sFilePath; //Saved File's Path "C I=`= private String sFileName; //Saved File's Name !0vG|C;' private int nSplitter; //Count of Splited Downloading File uA#P'? z{o'
G3 lc~%= public SiteInfoBean() d2H|LMhJ {//nSplitter的缺省值为5 2fWTY0 //default value of nSplitter is 5 `wDl<[V this("","","",5); ,uSQNre\j } -@0GcUE:r x3o]U)^ 9f<MQ6_UU public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }<9cL' { TzNn^ir=HX sSiteURL= sURL; $3s@}vLd sFilePath = sPath; '*"vkgN sFileName = sName; Nn T1X;0W this.nSplitter = nSpiltter; =*r])Vg^ CnG+Mc^ 3_MS.iM } fmb} 2h !qM=a3 ^h"`}[+ public String getSSiteURL() `Ch9~*p { Q+W1lv8R return sSiteURL; LC'{p } !BOY@$Y }MH0L#Tu )|DM~%$QM public void setSSiteURL(String value) `s8{C
b=}1 { nv~%#|v_W sSiteURL = value; g.zEn/SM } =9fajRFTt f
(F)1 ".<DAs j public String getSFilePath() aPm`^
q { ,v';>.] return sFilePath; $**r(HV } Ljx(\Cm d ysC4DS 'U\<IL#U public void setSFilePath(String value) &QGdLXOn { b"vv>Q~U sFilePath = value; !3*(N8_|# } [&#/]Ul' 3<
2}V aD=A^ktx public String getSFileName() SU/BQ3 { *rIk:FehLB return sFileName; ;3B1_vo9 } NqDHCI vM*($qpAy q@nP}Pv&5 public void setSFileName(String value) ~e+\k>^eN { >U]C/P[+ sFileName = value; tm#nU w } 'VlDh`<W 4:dH] q&W[j5E public int getNSplitter() "3)4vuX@;c { XbD4:i% return nSplitter; ^`)) C; } &iA?+kV +KvU$9Ad> RH O( ?8"_ public void setNSplitter(int nCount) 2E)wpgUc?e { dVi!Q@y+ nSplitter = nCount; jO1r)hw N> } CB/D4j; } 9Bw|(J 5
({t4dm .MJofE;Jn /* ^w c"&;=c| **Utility.java EuyXgK>g */ OG~6L4" package NetFox; <F`>,Pm G}:lzOlMH m6[0Kws& public class Utility { Od%"B\ O0pDd4)" ^ml'? public Utility() #7q7PYG4 { i5K[>5 @++.FEf 1M
781 } ZGYr$C~ O2f-5Y$@ //线程睡眠 &'}/f5s| public static void sleep(int nSecond) >V*mr{/1 { l33Pm/V2? try{ O^^C;U@U<1 Thread.sleep(nSecond); Q^e}?v%=%3 } Y<Fz)dQo catch(Exception e) {O`w,dMOI { '4|-9M3f e.printStackTrace (); }9W4"e 2) }
?l^1 *Q, } w6W}"Uw /|eA9 ] //日志 jg\Z;_!W public static void log(String sMsg) ZfgJ.<< {
s8rE$ System.err.println(sMsg); $}jssnoU } YtfVD7m <F=xtyl7 _J?
Dq public static void log(int sMsg) T3pmVl { Ou1JIxZ)| System.err.println(sMsg); KNLfp1! } ,H19`;Q } G6FEp` XAe%m^ kZerKP /* iMP]W_ **TestMethod.java ^WNrGF */ }t%!9hr5D package NetFox; /S(zff[at vbD{N3p)?n YGPy@-,E public class TestMethod { 5wh|=**/ (C@~3!AVa ,]cD public TestMethod() Hqn#yInA7~ { ///xx/weblogic60b2_win.exe \,7}mdQSv try{ Tny%7xSx1 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); FZtfh //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %e(z/"M=` SiteFileFetch fileFetch = new SiteFileFetch(bean); 6N;wqn fileFetch.start(); -OA?BEQ=I } 0#S W!b|% catch(Exception e){e.printStackTrace ();} K?zH35f$ )l[M
Q4vWW ;Mpy#yIU. } $W9{P; $[/&74#0HX 'Ub
g0"F( public static void main(String[] args) HsHB!mQV { j.L-{6_s>~ new TestMethod(); Ffv`kn@ } PUBWZ^63 } 0 rXx RQ 点击下载更多相关资料
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