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/* *,5V;7OR **SiteFileFetch.java N ncur] */ ]+;1) package NetFox; cP%mkh_ri import java.io.*; vJVL%,7 import java.net.*; a_XM2dc% /uS(Z-@ w~+5FSdH public class SiteFileFetch extends Thread { tp<uN~rTgh |ybW P1)f-:; SiteInfoBean siteInfoBean = null; //文件信息Bean Y~EKMowI&e long[] nStartPos; //开始位置 ]C_g:|q long[] nEndPos; //结束位置 ?9xaBWf FileSplitterFetch[] fileSplitterFetch; //子线程对象 8 P85qa@w long nFileLength; //文件长度 PhW<)B] boolean bFirst = true; //是否第一次取文件 ^IGutZov boolean bStop = false; //停止标志 *c4uCI:0t File tmpFile; //文件下载的临时信息 ..6 : _{wg DataOutputStream output; //输出到文件的输出流 w^Qb9vTa8 |@?B%sY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) xO)vn\uJ public SiteFileFetch(SiteInfoBean bean) throws IOException :W(3<D7\ { 0yr=$F(]s siteInfoBean = bean; O9*cV3}H //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /3->TS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); //cj$}Rn! if(tmpFile.exists ()) g\;AU2?p7 { H~E(~fl bFirst = false; j_S/// read_nPos(); B5h-JON]- } !c-Ie~GIT else jV
Yt=j*"V { =S/$h}Vi nStartPos = new long[bean.getNSplitter()]; RNGTSz nEndPos = new long[bean.getNSplitter()]; G6K;3B } ^{&Vv(~!Q YfL|FsCh N<o3pX2i] n^P=a'+ } j~,7JJ
(y wjh[}rTV* x)0g31 49 public void run() 2GOQ| Z { .|Y2'TWQ //获得文件长度 U ^1Xc#Ff //分割文件 -5,QrMM< //实例FileSplitterFetch eUlF4l<] //启动FileSplitterFetch线程 F{}mlQg //等待子线程返回 ^|y6oj try{ 2KVMQH`B9 if(bFirst) bOjvrg;Sz\ { &.z: i5&o! nFileLength = getFileSize(); f`'? 2 if(nFileLength == -1) T|^rFaA { %7=B?c| System.err.println("File Length is not known!"); >Ia{ZbQV } cF!ygz// else if(nFileLength == -2) .Tr!/mf_ { ~_ss[\N System.err.println("File is not access!"); taOD,}c|$ } N*z_rZE else 9bvz t8pc { 5W"&$6vj for(int i=0;i<nStartPos.length;i++) ({ 'I;]AQ { :0G "EM4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^@?-YWt } O8:$sei$ for(int i=0;i<nEndPos.length-1;i++) SA_5.. {
L,#ij!txS nEndPos = nStartPos[i+1]; =9$hZ c } OZ 4uk.) nEndPos[nEndPos.length-1] = nFileLength; I;iJa@HWQ } =" Q5Z6W } iu!j#VO /V@~Vlww XnC`JO+7M //启动子线程 8a{S* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; sLiKcR8^ for(int i=0;i<nStartPos.length;i++) ELoE-b)Cb { ZuZe8& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), d*3;6ZLy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), oc.H}Eb%Z nStartPos,nEndPos,i); Yw7+wc8R Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ( iM*Y"Y fileSplitterFetch.start(); f9v%k'T[ } 0}:- t^P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W*A-CkrO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); t\LAotTF/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 2<&lrsh nEndPos = " + nFileLength); g+>$_s // fileSplitterFetch[nPos.length-1].start();
`I*W}5 xXG-yh .b'o}DLa //等待子线程结束 ^6&?R?y //int count = 0; CBaU$`5 //是否结束while循环 ?VC[%sjwn boolean breakWhile = false; ybWb'+x E`vCYhf{ ["4sCB@Tr while(!bStop) R.n:W;^` { 9
Yv;Dom write_nPos(); tbz?th\# Utility.sleep(500); Y:|_M3&'o breakWhile = true; 6ww4ZH?j N}`.N [UO?L2$& for(int i=0;i<nStartPos.length;i++) O'tVZ!C#J { CX](^yU_ if(!fileSplitterFetch.bDownOver) V}?d
,.m`{ { &?~OV:r9 breakWhile = false; C.SGm break; $dr=M(& } US8pT|/ } SplEY!.k if(breakWhile) 7;cb^fi/ break; V6)e Jy B8Ob~? 8Ar5^.k //count++; rn1^6qy) //if(count>4) B> kx$_~ // siteStop(); ?m&?BsW$) } XXbAn-J Jw%0t'0Zi 6=V&3|" System.err.println("文件下载结束!"); _N`:NOM } nAc02lJh| catch(Exception e){e.printStackTrace ();} S+c) } 5LVhq[}mP _D%aT6,G+( D ff0$06Nq //获得文件长度 @ 2r9JqR[= public long getFileSize() |eD$eZ=m { D&5>Op4U int nFileLength = -1; H{*~d+:ol try{ IooAXwOF URL url = new URL(siteInfoBean.getSSiteURL()); Uloa]X=Im8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0fgt2gA33 httpConnection.setRequestProperty("User-Agent","NetFox"); #R_IF&7 Ap}^6_YXd fbF *C V int responseCode=httpConnection.getResponseCode(); \A
gPkW if(responseCode>=400) R~40,$e{ { O 0Fw!IQk processErrorCode(responseCode); W5a)`%H return -2; //-2 represent access is error xf1@mi[a } rUC@Bf FI@!7@ @^47Qgj8U String sHeader; v-`RX;8 @eQIwz 1+;Z0$edxz for(int i=1;;i++) %T:~N<8) { _c*0Rr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); $~M#msK9 //Utility.log(in.readLine()); /15e-(Zz/ sHeader=httpConnection.getHeaderFieldKey(i); g_z%L?N if(sHeader!=null) n W2[x; { u<`CkYT if(sHeader.equals("Content-Length")) ?C#=Q6 { Q v/}WnBk nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8 VMe#41 break; d!0p^!3 } Xy{\>}i]N } ;m/%g{oV else #R&Dgt
break; Hm=!;xAFX } VEAf,{)Q } eNN)2-96 catch(IOException e){e.printStackTrace ();} ?+S jt catch(Exception e){e.printStackTrace ();} D[)
Z$+D4f c`]_Q1'30w {Lj]++`fB] Utility.log(nFileLength); k@1\ULo 0eQwi l@ _F|oL| return nFileLength; %%[ "& } #K1VPezN v]CH
L#
| c8qsp n //保存下载信息(文件指针位置) AH$D./a private void write_nPos() [d="94Ab { FX
QUj&9 try{ _~f&wkc output = new DataOutputStream(new FileOutputStream(tmpFile)); uY]nqb output.writeInt(nStartPos.length); hr9[$4'H for(int i=0;i<nStartPos.length;i++) ` <+MR6M { mfHZGk[[ // output.writeLong(nPos); 3DH}
YAUU output.writeLong(fileSplitterFetch.nStartPos); Q[t|+RNKv2 output.writeLong(fileSplitterFetch.nEndPos); Bny3j~*U } ZTV|rzE output.close(); ,k}-I65M*t } {[V<mT2/ catch(IOException e){e.printStackTrace ();} /]~Oa#SQ: catch(Exception e){e.printStackTrace ();} 0zD[mt } RY=B>398: G]Fp}, ?1\rf$l8 //读取保存的下载信息(文件指针位置) w0n.Y-v4i private void read_nPos() b,]QfC { 2y/|/IW= try{ eh=.Q<N DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); HyKvDJ
3_ int nCount = input.readInt(); "F
nH>g- nStartPos = new long[nCount]; qV^Z@N+, nEndPos = new long[nCount]; E/MD]ox for(int i=0;i<nStartPos.length;i++) w'NL\> { Opc, {,z6 nStartPos = input.readLong(); .t\#>Fe nEndPos = input.readLong(); }Gmwm|`* } |E/r64T input.close(); `w@8i[2J } &)4#0L4 catch(IOException e){e.printStackTrace ();} E! '|FJ catch(Exception e){e.printStackTrace ();} X 4\ } 1"pvrX} 3o=R_%r *3;H6 private void processErrorCode(int nErrorCode) 9os>k* { !]1'?8 System.err.println("Error Code : " + nErrorCode); 9$)I=Rpk= } :\I88
-N@' |G^w2"D_Z @edx]H1~^ //停止文件下载 k/MrNiC public void siteStop() =+{SZh@ { X6lkz*M. bStop = true; (* WO<V for(int i=0;i<nStartPos.length;i++) ~ ;CnwG
fileSplitterFetch.splitterStop(); B(+J?0Dj N"A863> 0Z. bd=H } X?PcEAi;w } 6M({T2e //负责部分文件的抓取 x<_uwL2a **FileSplitterFetch.java 0q6$KP}q */ l423+vo package NetFox; 5Oh>r K( Uy$1X MM_c{gFF import java.io.*; ~?l>QP|o import java.net.*; v<+5B5"1 8t4o}3> rVo0H.+N)` public class FileSplitterFetch extends Thread { =1qM`M 2$G,pT1J @3T)J,f String sURL; //File URL NGsG4y^g?z long nStartPos; //File Snippet Start Position ;Mzy>*#$Q long nEndPos; //File Snippet End Position tGq0f"}'J int nThreadID; //Thread's ID W!@*3U]2R boolean bDownOver = false; //Downing is over 3zdm-5R.b boolean bStop = false; //Stop identical :Kc9k(3&r FileAccessI fileAccessI = null; //File Access interface 8RGU^& JL[xrK0 WS17DsWW public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Y
6B7qp { QU&LC this.sURL = sURL; >"}z
% # this.nStartPos = nStart; i@Vi.oc4[ this.nEndPos = nEnd; QfHJZ7K.4 nThreadID = id; uvbXsO"z]] fileAccessI = new FileAccessI(sName,nStartPos);//定位 <d&9`e1Hc } puE!7:X7 {3s=U"\ ga BVD*> public void run() .(D,CGtYb { S3cV^CzNg while(nStartPos < nEndPos && !bStop) HN7C+e4U~ { X:3W9`s)* s2`:NS 9d5|rk8VS try{ ;gE]*Y.Z.p URL url = new URL(sURL); ak_&\'P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S.^/Cl;aj httpConnection.setRequestProperty("User-Agent","NetFox"); El9D1], String sProperty = "bytes="+nStartPos+"-"; '
];| httpConnection.setRequestProperty("RANGE",sProperty); 5Vq&w`sW Utility.log(sProperty); vz{Z
tE" m :M=De -OvzEmI" InputStream input = httpConnection.getInputStream(); w-2?|XvDmf //logResponseHead(httpConnection); ;:)1:Dy5 VMa\?`fT iLvzoQ byte[] b = new byte[1024]; (fSpY\JPI int nRead; -UTTJnu^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h_xHQf { xna4W|- nStartPos += fileAccessI.write(b,0,nRead); 6qAs$[ //if(nThreadID == 1) SuorCp] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vdpvo;4uy } `Z)]mH\X *=b#>// !Z0p94L Utility.log("Thread " + nThreadID + " is over!"); &_1Ivaen6 bDownOver = true; c)5d-3" //nPos = fileAccessI.write (b,0,nRead); T/9`VB%N } "}91wfG9 catch(Exception e){e.printStackTrace ();} :h(r2?=7 } :3oLGiL } =Su~iOa #RN"Ul-B| E;*JD x //打印回应的头信息 Ei$@)qS/ public void logResponseHead(HttpURLConnection con) Vm_<eyI2 { pz
uR H1[ for(int i=1;;i++) j$%uip{ { 3M@!?=|U String header=con.getHeaderFieldKey(i); \H6[6*JuB if(header!=null) h3udS{9'8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,sk0){rW Utility.log(header+" : "+con.getHeaderField(header)); <"}Gvi else (hb\1wZ break; FxK2 1 } 4Iq-4IG( } s\Zp/-Q >}?4;:.= jdEqa$CXG public void splitterStop() |o5F%1o { ~"IjT'W3 bStop = true; xklXV } P.j0 Xlof m0$4 0/g 0=dW= } )"]Nf6 :t'*fHi~ ,'FdUq )i /* qad`muAd **FileAccess.java ophQdJM *//文件访问(定位,写) DXH"`1[- package NetFox; Y*KHr`\C4 import java.io.*; !.^%*6f faqh }4 =ghN)[AZV public class FileAccessI implements Serializable{ j,%<16f^A MU-T>S4
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节
=Eimbk RandomAccessFile oSavedFile; SFaG`T= long nPos; %YhM?jMW REaU=-m- BB)(#yoi public FileAccessI() throws IOException tsqkV7? { eX1<zzd this("",0); q\xT } 0~;Owu mh8{`W & F^xhhz&e public FileAccessI(String sName,long nPos) throws IOException S.Z2gFE&tu { ar#Xe;T! oSavedFile = new RandomAccessFile(sName,"rw"); $7~T+fmF this.nPos = nPos; o/6'g)r* oSavedFile.seek(nPos); 7/:C[J4GTN } C@$!'^ 61 Te :4z@? Z_tK3kQa@& public synchronized int write(byte[] b,int nStart,int nLen) a7_ &; { Fhr5)Z int n = -1;
FK2* O try{ <%~`!n,t0 oSavedFile.write(b,nStart,nLen); 7[)IP:I> n = nLen; ap7ZT7KW } "B^c catch(IOException e) i- v PJg1 { e=yQFzQT) e.printStackTrace (); [
BpZ{Ql } Ns*&;x9 MzWVsV y7?n;3U]CS return n; v_7?Zik8E } X:ck 8^8fUN4<= 5,;>b^gXY` } =gYKAr^p5 E5H0Yo.Wi B]""%&! O /* _$oN"pj **SiteInfoBean.java V2&O]bR */ t04_~e package NetFox; bu
j}pEI :L E&p[^ ?aMV{H*Q* public class SiteInfoBean { 2Gw2k8g& f
<,E S>!
YBzm&X private String sSiteURL; //Site's URL WaaF;|,( private String sFilePath; //Saved File's Path AxsTB9/ private String sFileName; //Saved File's Name )C@O7m*.4 private int nSplitter; //Count of Splited Downloading File nNN~Z'bG jIzkI)WC| `~0^fSww public SiteInfoBean() u@ "nVHgMJ {//nSplitter的缺省值为5 D<DSK~ //default value of nSplitter is 5 _yu d this("","","",5); yqY nd<K4 } s"7$SxMT 323zR*\m GmONhh(k public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) !ULU#2'1 { >Z\{P8@k0 sSiteURL= sURL; pKnM= N1f sFilePath = sPath; 3>+9Rru sFileName = sName; @lYm2l^ this.nSplitter = nSpiltter; -$;
h+9BO 3Y
L P_ [A } T[z}^" \h#,qTE (D?%(f public String getSSiteURL() X:un4B}O { aT]G&bR? return sSiteURL; sp2"c"_+ } 5*q!:$
W "<e<0:: ^hc&rD)_ public void setSSiteURL(String value) %y{f]m { cEP!DUo sSiteURL = value; 'R{XqHP } L,m'/}$ zE~{}\J (eG9b pqr public String getSFilePath() tU5Z?QS { 7jj.maK return sFilePath; ,vxxp]#5 } TIs~?wb$ 3!&PI pBd_BaN public void setSFilePath(String value) "&_$%#HUv { xD:t$~ sFilePath = value; P
,%IZ. } 4P>[]~S AM[#AZv Y]u6f c public String getSFileName() vxey$Ir { ZQ%4]=w return sFileName; up# R9
d| } 4*)a3jI? j,]KidDWm I3ZlKI public void setSFileName(String value) Gr&)5hm$ { NSsLuM=. sFileName = value; z'W8t|m}Pb } EJ%Kr$51K cl`!A2F1G# pX\Y:hCug public int getNSplitter() 65 P*Gu? { $jc&Tk# return nSplitter; o_(@v2G` } (i 3=XfZ!C V5.=08L
MeP,8,n' public void setNSplitter(int nCount) ]]EOCGZ" { T3JM8 nSplitter = nCount; C:?mOM#_ } <$V!y
dO } "%mu~&Ga !"G|y4O cLZaQsS% /* ,>AA2@6zMT **Utility.java 6JCq?:#ab */ [!<W{ ($5 package NetFox; MnQ4,+ji- RRasX;zK h&k*i public class Utility { `veq/! 2fa1jl 'Avp16zg public Utility() [s}nv] { wqZ*$M .!B>pp(9 Y*KP1=Md } >l$qE >k)zd- //线程睡眠 HQ7 public static void sleep(int nSecond) ZQVr]/W^r { ){sn!5= try{ /Cl=;^) Thread.sleep(nSecond); FUD
M]:XQ } ZJod=^T catch(Exception e) WlF}R\N! { "Q[rM1R e.printStackTrace (); JDI1l_Ga } ,lUroO^^ } g?mfpw Zj w]&
o]VP //日志 Mqk[+n public static void log(String sMsg) F4#^jat{ { $ lC*q System.err.println(sMsg); Tp.t.Qic } MIn6p 'A#bBn,| jkrv2 `" public static void log(int sMsg) jx?"m=`s: { "fq8) System.err.println(sMsg); T 8.
to } rDEdMT } 7/UdE:~]*= ITmW/Im5 #% 1|$V*: /* ,iy;L_N **TestMethod.java S*D Bzl */ $.g)%#h: package NetFox; sT;:V
?!{nN J w%NT
0J public class TestMethod { Ia'm9Z* 0\X'a}8Bu >(9"D8 public TestMethod() N+V_[qr# { ///xx/weblogic60b2_win.exe -IP 3I try{ H+O^e l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); -:jC.}
Y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8K;wX%_, SiteFileFetch fileFetch = new SiteFileFetch(bean); h88IP:bo fileFetch.start(); _]/&NSk } M6MtE_E catch(Exception e){e.printStackTrace ();} f:K3 P[| IW&.JNcN aP}%&{iC* } h]w5N2$}? qbunP! ss4<s
5:y public static void main(String[] args) flr&+=1?D { '-?t^@ new TestMethod(); !vQDPLBL } 4or8fG } uTq)Ets3 点击下载更多相关资料
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