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/* o1YU_k<# **SiteFileFetch.java 9!t4> */ 9p>
/?H| package NetFox; $au2%NL import java.io.*; {of]/3= import java.net.*; 0:dB
9 XU#,Bu{ /Antb6E public class SiteFileFetch extends Thread { +?e}<#vd'? &LU'.jY jpO38H0) SiteInfoBean siteInfoBean = null; //文件信息Bean dB`b9)Tk0z long[] nStartPos; //开始位置 YMAQ+A! long[] nEndPos; //结束位置 ^"tqdeCb= FileSplitterFetch[] fileSplitterFetch; //子线程对象 I>((o` long nFileLength; //文件长度 98<zCSe\] boolean bFirst = true; //是否第一次取文件 C.E[6$oVc boolean bStop = false; //停止标志 oO:LG%q File tmpFile; //文件下载的临时信息 31 ]7z DataOutputStream output; //输出到文件的输出流 4Vx+[8W uiK:*[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !Y%D
9 public SiteFileFetch(SiteInfoBean bean) throws IOException B+D`\ Nl o { fSV5 siteInfoBean = bean; %vc'{`P //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^W['A]l tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); MxN]7 if(tmpFile.exists ()) A[ 1)!e { *tAqt2{48 bFirst = false; =8S}Iat read_nPos(); q)Je.6$#X } WOH9%xv else {U
P_i2`. { oYqE*mA nStartPos = new long[bean.getNSplitter()]; /'Bdq?!B& nEndPos = new long[bean.getNSplitter()]; /\~W$.c } s?<!&Y +UaO<L
kv%)K'fU4 d
H_2o } m~Me^yt>} nh|EZp] -wIM0YJ public void run() Y\>\[*.v { !47A$sQ
//获得文件长度 bBFwx @
//分割文件 ;8EjjF [> //实例FileSplitterFetch )]]|d //启动FileSplitterFetch线程 auA.6DQ //等待子线程返回 h*waRD try{ *cy.*@d if(bFirst) .9I_NG { r1hD
%a nFileLength = getFileSize(); ZE ^u .>5 if(nFileLength == -1) GFY-IC+fc { [+7"{UvT System.err.println("File Length is not known!"); Fi k@hu } Q^ q=!/qQ else if(nFileLength == -2) Y(W{Jd+ { rUvwpP"k System.err.println("File is not access!"); 2q|_Dma } |Rk37P{ else 4Qhx[Hv>( { aZC*7AK
for(int i=0;i<nStartPos.length;i++) T/5nu?v { *<CxFy;| nStartPos = (long)(i*(nFileLength/nStartPos.length)); Obg@YIwn } }*ODM6 for(int i=0;i<nEndPos.length-1;i++) Z
c<]^QR { A<;0L . J nEndPos = nStartPos[i+1]; I &cX8Tw } Cd9t{pQD4 nEndPos[nEndPos.length-1] = nFileLength; C*]AL/ } n\
Gg6Y } T*p|'Q` _dY:)%[] o8mo=V4j //启动子线程 =QTmK/(|B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v6KL93 for(int i=0;i<nStartPos.length;i++) }7&\eV{qU { 4Z],+?.[ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H7J`]nr6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), MXh^dOWR nStartPos,nEndPos,i); =>.DD<g" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j@_nI~7f} fileSplitterFetch.start(); r8<JX5zyuo } {Wr\DVp // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Vzk cZK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); B_b8r7Vn` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", d[yrNB6| nEndPos = " + nFileLength); r \9:<i8 // fileSplitterFetch[nPos.length-1].start(); cy9N:MR(c cyDiA(ot& ~S!L!qY //等待子线程结束 M$gvq:}kt //int count = 0; # e$\~c Pd //是否结束while循环 M'b:B*>6 boolean breakWhile = false; ^v#+PyW kaV%0Of] }t}38%1i while(!bStop) MyK^i2eD { -Zttj /K write_nPos(); %{=4Fa(Jux Utility.sleep(500); b,zR5R^D; breakWhile = true; i:\bqK 6_pDe pFS
F[9?e> for(int i=0;i<nStartPos.length;i++) $/MY,:*e { o&WRta>VP if(!fileSplitterFetch.bDownOver) GsR-#tV@ { a\.//? breakWhile = false; d4[poi ~ break; 2f s9JP{^0 } aYqqq| } 9 Zs#Ky/ if(breakWhile) 4p*?7g_WVH break; 32TP Mk \-DM-NrZ1U sTJJE3TBI //count++; 1 VPg`+o //if(count>4) U<1}I.hDJ // siteStop(); ngtuYASc } t- !h
X/ aA7S'[NjB Yjpb+} System.err.println("文件下载结束!"); #tCIuQ, } eOO!jrT: catch(Exception e){e.printStackTrace ();} C+}CU} } zUvB0\{q B b$S^F(Xq Rv0-vH.n //获得文件长度 W^-hMT]uD public long getFileSize() hQ\#Fhu7 { ]v/t8` int nFileLength = -1; 39'X$! try{ 7)g;Wd+H URL url = new URL(siteInfoBean.getSSiteURL()); "4J?JR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wOD/Z8 httpConnection.setRequestProperty("User-Agent","NetFox"); oiIt3<BX -i| /JH g-4gI\ int responseCode=httpConnection.getResponseCode(); ?*B;514 if(responseCode>=400) )G}sb*+v? { 8 ))I$+ processErrorCode(responseCode); Ir'DA_.. return -2; //-2 represent access is error =>E44v } H@VBP
Q}Q Y j,9V], 1c1e+H String sHeader; EU`'
8*4 V3aY]#Su B3ohHxHu for(int i=1;;i++) (!^N~ =e; { q8&4=eV\A //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); H620vlC}V //Utility.log(in.readLine()); |DdW<IT`0 sHeader=httpConnection.getHeaderFieldKey(i); .&aVx] if(sHeader!=null) bcGn8 { Y/QK+UMW* if(sHeader.equals("Content-Length")) C?_t8G./_ { &utS\-;G nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); LR
8e|H0 break; 1\"BvFE*E~ } 3hp
tP } P}w^9=;S else o.v,n1Nm break; Q*TQ*J7".X } ]~4}(\u } >2!^ dT^D catch(IOException e){e.printStackTrace ();} 3|z;K,`Fw catch(Exception e){e.printStackTrace ();} @U7U?.p +btP]?04 }WBm%f Utility.log(nFileLength); T%z!+/=&^ *X"F: 7 2n"*)3Qj return nFileLength; >?:i6&4o } Qe'PAN=B rzc 3k~@ % B7?l //保存下载信息(文件指针位置) _.s\qQ private void write_nPos() 72BzvY. { # UP,;W try{ b*$o[wO9 output = new DataOutputStream(new FileOutputStream(tmpFile)); -NI@xJO4(; output.writeInt(nStartPos.length); &**.naSo for(int i=0;i<nStartPos.length;i++) DU*Hnii { exa}dh/uC // output.writeLong(nPos); j[Hg] output.writeLong(fileSplitterFetch.nStartPos); Lt#:R\;& output.writeLong(fileSplitterFetch.nEndPos); Bk@_]a } A=@V LU4% output.close(); Ezo" f } 3 8ls 4v3 catch(IOException e){e.printStackTrace ();} {#d`&] catch(Exception e){e.printStackTrace ();} Jf8'N
ot } &El[ u8$~N$L PhI{3B/ //读取保存的下载信息(文件指针位置)
.*clY private void read_nPos() 42H#n]Y { N-_| %C-. try{ g*\v}6
h DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); pB{ f-M:D int nCount = input.readInt(); b_"V%<I nStartPos = new long[nCount]; |<5J nEndPos = new long[nCount]; 07E".T%Ts for(int i=0;i<nStartPos.length;i++) _3-,3ia { RvZryA*vu nStartPos = input.readLong(); 'ra_Zg[j nEndPos = input.readLong(); `cy"-CJS } @b(gjOE input.close(); d&3I>E$UP } hKH
Q!`&v catch(IOException e){e.printStackTrace ();} Qr xO
erp catch(Exception e){e.printStackTrace ();} yp7,^l } Phjf$\pt |7 W6I$Xl r>D[5B private void processErrorCode(int nErrorCode) ]mDsUZf< { #|2g{7g* System.err.println("Error Code : " + nErrorCode); o2t@-dNi } 4$#ia
F 9Y*Vz QE kA->xjk //停止文件下载 DNTRLIKa public void siteStop() 34&$_0zn { '@1Qx~*]e bStop = true; B3i=pcef for(int i=0;i<nStartPos.length;i++) q'U-{~q% fileSplitterFetch.splitterStop(); 'e8d["N EXScqGa] ,4?|}xg } hJL0M! } u8)r
W //负责部分文件的抓取 ;z=C^' **FileSplitterFetch.java ^SelqX */ 6!Ap;O^* package NetFox; yW7S
}I Y)-)NLLG;n #'{PYr import java.io.*; laIC}! import java.net.*; PT5ni6 eWt>^]H~ E*#60z7F public class FileSplitterFetch extends Thread { g\mrRZ/? SGT-B. "}Sid+)< String sURL; //File URL ^a0-5 long nStartPos; //File Snippet Start Position gB'Ah -@,P long nEndPos; //File Snippet End Position OEq e^``! int nThreadID; //Thread's ID 97@?QI} boolean bDownOver = false; //Downing is over QSQ\@h;E boolean bStop = false; //Stop identical JT+lWhy FileAccessI fileAccessI = null; //File Access interface $1`t+0^k ,)\5O0 D6 1x5CsmS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException x'PjP1 { 'jO-e^qT this.sURL = sURL; J}` $WL: this.nStartPos = nStart; )^a#Xn3z this.nEndPos = nEnd;
OCoRcrAx nThreadID = id; _TeRsA fileAccessI = new FileAccessI(sName,nStartPos);//定位 EYj2h
.k } %QcG^R g 0_r \<+47+ public void run() 2nz'/G { Q,+*u%/u while(nStartPos < nEndPos && !bStop) Ih0>]h-7 { Z`Eb
L eEb1R}@ F1]PYx$X try{ YSUH*i/% URL url = new URL(sURL); pzp"NKxi HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Zvw3C%In httpConnection.setRequestProperty("User-Agent","NetFox"); 9MlfZsby String sProperty = "bytes="+nStartPos+"-"; }qX&*DU_@ httpConnection.setRequestProperty("RANGE",sProperty); AZ@Zo' Utility.log(sProperty); Bwvc@(3v q|_ 5@Ly !ES#::;z? InputStream input = httpConnection.getInputStream(); g KY
,G //logResponseHead(httpConnection); wEn&zZjx 4BL,/(W]
x 9fLP&v byte[] b = new byte[1024]; h 7P?n.K int nRead; [~%;E[ky$ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) V$%Fs{ { ?;QKe0I^ nStartPos += fileAccessI.write(b,0,nRead); =1B&d[3; //if(nThreadID == 1) 5/VB'N#7s // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nylIP */ } A>,fG9pR +mF 2yh 5m;wMW< Utility.log("Thread " + nThreadID + " is over!"); zEL[%(fnc bDownOver = true; Ljs(<Gm)- //nPos = fileAccessI.write (b,0,nRead); m<HjL } L&k$4,Z9 catch(Exception e){e.printStackTrace ();} }U1{&4Ph } WmBnc#>gK }
x a,LV ?B4QTx9B /9^0YC;Y* //打印回应的头信息 S~9kp?kR$ public void logResponseHead(HttpURLConnection con) w3hL.Z,kV { G+yz8@ for(int i=1;;i++) ~_\2\6%1^n { ZuV String header=con.getHeaderFieldKey(i); \)
ONy9 if(header!=null) ?UZyu4O% //responseHeaders.put(header,httpConnection.getHeaderField(header)); GM92yi!8 Utility.log(header+" : "+con.getHeaderField(header)); D#AxgF_He else Sk%|-T(d$ break; Ceb i9R[ } n8ya$bc } f
}e7g d]M I>zn$d*0 +Rd{ ?)2~ public void splitterStop() l3$?eGGM { p;01a bStop = true; t`D@bzLC% } ]8z6gDp vDb}CQ\ pAL-Pl9z } `-\JjMSQ1 \Vq;j 1 $e\R5Lu /* 0]W/88ut*u **FileAccess.java 4s2ex{$+MA *//文件访问(定位,写) hkc_>F]Hx package NetFox; aB_z4dqwU import java.io.*; O&%T_Zk@@ ps
J 1J 9e6{( public class FileAccessI implements Serializable{ mw%_yDZ{ Z@umbyM //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 gQGiph | RandomAccessFile oSavedFile; eT?LMBn\ long nPos; +t6m>IBu t,YAk
?} hY'%SV
p public FileAccessI() throws IOException ;sJ2K"c { <C xet~x this("",0); W%:zvqg
v } f>PU# D@B 7 {<lH%Tn (J#3+I public FileAccessI(String sName,long nPos) throws IOException 4 ETVyK|
{ nwVtfsb oSavedFile = new RandomAccessFile(sName,"rw"); ] lTfi0}g_ this.nPos = nPos; YiMecu oSavedFile.seek(nPos); Hn.UJ4V } yh!vl&8M -|mRJVl8 [G)Sq; public synchronized int write(byte[] b,int nStart,int nLen) tx-bzLo\ { osI(g'Xb int n = -1; )2hoO_l: try{ wkw/AZ{27 oSavedFile.write(b,nStart,nLen); tam/FzVw n = nLen; wxrT(x| } Reo0ZU> catch(IOException e) wtyu"=
{ e2F7G>q:5 e.printStackTrace (); Z2
4 m } @x4Dt&:" E$
rSrT( W ,+91rup return n; aKO@_R,: } VVOt%d W=:+f)D } U.B$4Q } tDVdl^# Uk4">]oct 8&bj7w,K /* #U6qM(J **SiteInfoBean.java ;C%EF */ 1C{n\_hR package NetFox; +J9lD`z &kBs'P8> !8].Z"5J public class SiteInfoBean { =%`" zKr(Gt8 ?;Qk!t2U private String sSiteURL; //Site's URL :SGQ4@BV private String sFilePath; //Saved File's Path O'(vs"eN private String sFileName; //Saved File's Name &$f?XdZ7 private int nSplitter; //Count of Splited Downloading File 4YC`dpO' dQb?Zi7g 9OBPFF public SiteInfoBean() &rubA {//nSplitter的缺省值为5 &9>d //default value of nSplitter is 5 }z#8vE; this("","","",5); 'cv/"26# } bcG-js- D?R z| >%,tyJ~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) W#Z]mt B { tK*f8X+q sSiteURL= sURL; ^=j$~*(LmX sFilePath = sPath; I5,Fh> sFileName = sName; 3IIlAzne; this.nSplitter = nSpiltter; z7o59& o-_a0j
D6pk!mS } Z)~2{) _JS'~JO3{ $9/r*@bu8d public String getSSiteURL() $}@ll^ { Yc}b& return sSiteURL; \T?O. } .xx9tP}Xy @B6[RZ R [sBD|P;M public void setSSiteURL(String value) _=b[b]Ec$s { w# ['{GL sSiteURL = value; Y9N:%[ :>W } (;N_lF0 ~JJv 2 *zcH3a,9"x public String getSFilePath() `/O_6PQ} { NbdaP{{ return sFilePath; p|%)uA3'/ } JT+P>\\];' {<lV=0] N*#SY$!y public void setSFilePath(String value) })Jp5vv { _]g6
3q sFilePath = value; :n=+$Dq } ;%} ,aeFEsi q!n|Ju< public String getSFileName() 4{V=X3,x { <Ip}uy[Y return sFileName; O;~1M3Ii } W$W7U|Z9y+ tF4"28"h z|Xl%8 public void setSFileName(String value) LS`Gg7]S { oKUJB.PF sFileName = value; hn-S$3')` } ;rX4${h X!m/I
i$q /T?['#:r-) public int getNSplitter() hikun2 { ji "*=i return nSplitter; OP@PB| } *m2:iChY {r"HR%*u Cpl\}Qn public void setNSplitter(int nCount) lH[N*9G( { rfk';ph nSplitter = nCount; QL3%L8 } #/aWGx_ } j JW0a\0 ^U52
*6 S}>rsg! /* lp6GiF **Utility.java 7Y-GbG.' */ F~m tE8B: package NetFox; g$ h!:wW J;qH w[6 0F"xU1z, public class Utility { j%lW+[% B=f{`rM)~W yuND0,e public Utility() 3E#acnqn* { rl4-nA _z_uz\#, !cfn%+0 } B|8(}Ciqx !!9V0[ //线程睡眠 R
+k\)_F public static void sleep(int nSecond) ^'}Td~( { h'
16"j> try{ >y1/*)O9~ Thread.sleep(nSecond); wFh{\ } RxqXGM`4 catch(Exception e) IgVxWh# { ^OUkFH;dG? e.printStackTrace (); Vry# } `=oN &! } M$w^g8F27H aw(P@9] //日志 DY1o!thz) public static void log(String sMsg) bygwoZ<E { "UE'dWz System.err.println(sMsg); UXd\Q'' } WHU&9N .; :[sv) )%*uMuF public static void log(int sMsg)
djk { ^CX~>j\( System.err.println(sMsg); J=()
A+ } uvT]MgT } l?ofr*U&-x DJeG b.$Gc!g /* =!7yX;| **TestMethod.java {1FYHM^ */ Zf|f $1- package NetFox; JIK;/1 *F=wMWa 2Ddrxc>48 public class TestMethod { hF6EOCY6D )4j#gHN\ /QTGZb public TestMethod() ~dC^| { ///xx/weblogic60b2_win.exe )5B90[M|t try{ =\tg$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); % nJ'r?+h //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _,5(HETE2 SiteFileFetch fileFetch = new SiteFileFetch(bean); p3X> fileFetch.start(); KVJiCdg- } DI+kO(S catch(Exception e){e.printStackTrace ();} -BR&b2 Ucv-}oa-? HZR~r:_
i } NX$$4<A1 "",V\m -8g ;t3z public static void main(String[] args) qW),)i { UAa2oY& new TestMethod(); 2uz<n}IV } HdLVXaD/ } Kx ';mgG#$ 点击下载更多相关资料
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