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/* k%81f'H **SiteFileFetch.java NXk!qGV2 */ p,W_'?,9 package NetFox; <48<86TP import java.io.*; \}"m'(\c import java.net.*; >U!*y4 5M_Wj*a}7 l=m(mf?QBg public class SiteFileFetch extends Thread { rf
K8q'@ Ol/N}M|3 n"D ?I SiteInfoBean siteInfoBean = null; //文件信息Bean xge7r3i long[] nStartPos; //开始位置 [(mlv42" long[] nEndPos; //结束位置 3iX?~ FileSplitterFetch[] fileSplitterFetch; //子线程对象 |U'I/A long nFileLength; //文件长度 svhI3"r boolean bFirst = true; //是否第一次取文件 kxB.,' boolean bStop = false; //停止标志 [iS$JG-
File tmpFile; //文件下载的临时信息 }JgYCsF/f DataOutputStream output; //输出到文件的输出流 8|g<X1H{M 5Fw - d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) }IaA7f public SiteFileFetch(SiteInfoBean bean) throws IOException ]uh3R{a/ { #f,y&\Xmf siteInfoBean = bean; \2v"YVWw
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); nv/[I,nw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Gh(
A%x) if(tmpFile.exists ()) t?eH'*> { @%ECj)u`O bFirst = false; 83Ou9E!W read_nPos(); zGo|JF } a2@c%i else K7)kS { k;^
: nStartPos = new long[bean.getNSplitter()]; \Y|*Nee}XP nEndPos = new long[bean.getNSplitter()]; P:xT0gtt } hpbf&S4 8Cx^0 1Y j~fb( YK#fa2ng } Dl\` x!<yT?A |V,<+BEi public void run() *f+: <=i { 5"KlRuv% //获得文件长度 ?h8{xa5b //分割文件 TLa]O1=Bf. //实例FileSplitterFetch o*S"KX$ //启动FileSplitterFetch线程 X[$++p
. //等待子线程返回 >bo'Y9C try{ _GYMPq\%L# if(bFirst) 2 -+f1, { Vm1-C<V9 nFileLength = getFileSize(); A<MtKb
if(nFileLength == -1) `)$_YZq|SR { 0#p/A^\#7M System.err.println("File Length is not known!"); e]8,:Gd( } 2tQ`/!m>v$ else if(nFileLength == -2) $&I'o { -7qIToO. System.err.println("File is not access!"); fz_nsVD } <yUstz,Xu^ else v
$({C { V*[b}Xew for(int i=0;i<nStartPos.length;i++) afG{lWE) { ~.g3ukt nStartPos = (long)(i*(nFileLength/nStartPos.length)); fPa9ofU/kr } ?}QH=&=^ for(int i=0;i<nEndPos.length-1;i++) DvXHK { clO,}Ph> nEndPos = nStartPos[i+1]; k+ o|0 } z_|oCT!6 nEndPos[nEndPos.length-1] = nFileLength; i'/m4 !>h } Rd*[%) } oA-:zz>wL uzr\oj+> B2=\2< //启动子线程 o2H1N~e#c fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; },$0&/>ft for(int i=0;i<nStartPos.length;i++) g{k1&| { 7;:#;YSha fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,T,:-E siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), p*QKK@C nStartPos,nEndPos,i); <[ Xw)/# Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A#wEuX=[ fileSplitterFetch.start(); I3b"|% } 3INI?y}t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xl9aV\W siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7L5P%zLtB // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {}~: &.D nEndPos = " + nFileLength); YvL?j // fileSplitterFetch[nPos.length-1].start(); Y$>-%KcKeI bzpFbfb m!n/U-^ //等待子线程结束 W~n.Xeu{C //int count = 0; p/6zEZ* //是否结束while循环 p
zw8 T boolean breakWhile = false; c7uG9 ~"x5U{K48S "8 )z=n while(!bStop) f>j wN@( { +|cI:|H> write_nPos(); c~}l8M% Utility.sleep(500); Tb;d.^ breakWhile = true; upn~5>uCP >pyj]y^3 Njc%_&r for(int i=0;i<nStartPos.length;i++) dhPKHrS { XUMX* if(!fileSplitterFetch.bDownOver) w&h2y4 { &7mW9] breakWhile = false; .1 )RW5|c break; I5ss0JSl/ } ={2!c0s } yc;3Id5?> if(breakWhile) B:TR2G9UT break; e0,'+;*=g h+~P"i}&\ K-vWa2 //count++; H;ZHqcUX //if(count>4) 7u.|XmUz // siteStop(); R{Z-m2La } kK>X rj6 |iYg > zSTR^sgJ System.err.println("文件下载结束!"); qeL pXe0c } Ji'(`9F&a catch(Exception e){e.printStackTrace ();} F'PQqb { } Lz9#A. g:ErZ;[ 6SM:x]`##, //获得文件长度 zR6siAV9 public long getFileSize() }3 m0AQ;K { [onqNp int nFileLength = -1; BbOu/i| try{ or*HC&c7 URL url = new URL(siteInfoBean.getSSiteURL()); =v~1qWX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %u\26[/ httpConnection.setRequestProperty("User-Agent","NetFox"); _ o6G6e, &-l8n^ |[xi/Q^7 int responseCode=httpConnection.getResponseCode(); BG`s6aC|z< if(responseCode>=400) 0>Z ;Ni { ]
f>]n processErrorCode(responseCode); \{\MxXW return -2; //-2 represent access is error hn)a@ } D87|q4 &-yGVx \YJy#2K String sHeader; q0mOG^ l;X|=eu' ?9MVM~$ for(int i=1;;i++) Ds8
EMtS { sRHA."A!8 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); R0Ue0pF7 //Utility.log(in.readLine()); zJlQ_U- ! sHeader=httpConnection.getHeaderFieldKey(i); Yj(4&&Q if(sHeader!=null) 7^TV~E# { Iry if(sHeader.equals("Content-Length")) 4NR@u\S { G\gMC
<3 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /?-7Fg+, break; 6R UrF } u`:hMFTID } Gi6T[" else Xk mQBV" break; H jNxqaljt } Btt]R } Yd
cK&{ catch(IOException e){e.printStackTrace ();} er.L7 catch(Exception e){e.printStackTrace ();} a l9.} \(UKdv L#[]I, Utility.log(nFileLength); Z{NC9 VObrlOkp j5$BK[p. return nFileLength; *!e(A ]& } <-Bx&Q &<'n^n a?5[k}\ //保存下载信息(文件指针位置) i7[uLdQ private void write_nPos() `BFIC7a { ~:Uwg+]j try{ hPhZUL% output = new DataOutputStream(new FileOutputStream(tmpFile)); 6&U+6gb output.writeInt(nStartPos.length); ZUXr!v/R:1 for(int i=0;i<nStartPos.length;i++) #%3rTU { W1aa:hEf // output.writeLong(nPos); C.MoKa3 output.writeLong(fileSplitterFetch.nStartPos); C&\5'[* output.writeLong(fileSplitterFetch.nEndPos); >XW*T5aUA } $K~LM8_CKy output.close(); H(^bC5' } $3+PbYY catch(IOException e){e.printStackTrace ();} m(OvD! catch(Exception e){e.printStackTrace ();} r} _c } 'Yy&G\S { >{B`e`$ )
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//读取保存的下载信息(文件指针位置) _>o-UBb4]T private void read_nPos() w2(guL($ { *v%rMU7, try{ L *[K>iW DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wRNroQ int nCount = input.readInt(); =dP{ Gh nStartPos = new long[nCount]; c>bq%} nEndPos = new long[nCount]; Eu<1Bse; for(int i=0;i<nStartPos.length;i++) v{x{=M] { -]G(ms;}/Y nStartPos = input.readLong(); (LAXM
x nEndPos = input.readLong(); 2i#Sn' 1 } `:{B(+6 input.close(); p^m5`{1]x } 0Sl]!PZR1 catch(IOException e){e.printStackTrace ();} 72T I catch(Exception e){e.printStackTrace ();} 3+7^uR$/I4 } w]j+9-._ 1{"llD ?z-}>$I; private void processErrorCode(int nErrorCode) ^>4o$} { w[Gh+L30=5 System.err.println("Error Code : " + nErrorCode); wYsZM/lw } =wu*D5 5m$2Ku i@"e,7mSG //停止文件下载 <pLT'Y= public void siteStop() hm$X]H`uMX {
^{@![' bStop = true; U$&hZ_A for(int i=0;i<nStartPos.length;i++) iGXI6`F" fileSplitterFetch.splitterStop(); `xS{0P{uj m@Ev~~; $9
p!Y} } 7J$b$P0} } {0\,0*^p //负责部分文件的抓取 _,h@:Xij **FileSplitterFetch.java =(AtfW^H */ j|.} I package NetFox; V)o,1
79J-)e9 1,y&d}GW import java.io.*; DLE8+NV8
import java.net.*; vy@rQC %9 WUdKLx%F e=P public class FileSplitterFetch extends Thread { JYqSL)Ta*t r~[vaQQ6L ]J1S#Q5' String sURL; //File URL ig"uXs long nStartPos; //File Snippet Start Position lw%?z/HDf long nEndPos; //File Snippet End Position 8am`6;O:! int nThreadID; //Thread's ID e>'H
IO boolean bDownOver = false; //Downing is over `A%^UCd boolean bStop = false; //Stop identical 9e!NOl\_;. FileAccessI fileAccessI = null; //File Access interface
ye6H*K YL^=t^!4 -!qu"A: public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException pz^<\ { XP[uF ;w this.sURL = sURL; K5Wg"^AHY/ this.nStartPos = nStart; 1tzV8(7 this.nEndPos = nEnd; u }hF8eD nThreadID = id; ,M !tm7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 G*
%t'jX9 } wl=61Mb tEd.'D8 s sf}Dh public void run() %u{W7 { JD>d\z2QC while(nStartPos < nEndPos && !bStop) igf)Hb;5 { Ha>*?`?yI $Byj}^ ;1 iSRpfU try{ &tR(n$M@> URL url = new URL(sURL); jPvDFT^d/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); td2/9|Q httpConnection.setRequestProperty("User-Agent","NetFox"); @=S}=cl String sProperty = "bytes="+nStartPos+"-"; R httpConnection.setRequestProperty("RANGE",sProperty); u?ek|%Ok Utility.log(sProperty); I&c ~8Dw !4@G3Ae22 #4LFG\s InputStream input = httpConnection.getInputStream(); ~Z/
^c,[: //logResponseHead(httpConnection); U09.Y q=HHNjj8
,"-Rf<q/ byte[] b = new byte[1024]; G%p~m%zIK int nRead; wJb#g0 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2Tav;LKX { SM 0M% nStartPos += fileAccessI.write(b,0,nRead); 1B>V t*= //if(nThreadID == 1) Yx'res4e // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); u),Qa=Wp } wle@vCmr fBtm%f 8{U-m0v Utility.log("Thread " + nThreadID + " is over!"); ~%u|[$ bDownOver = true; $S*4r&8ZD //nPos = fileAccessI.write (b,0,nRead); Z!xVgM{ } UAF<m1 catch(Exception e){e.printStackTrace ();} $$Vt7"F } " }gVAAvc7 } Nb2Qp
K Rr(* aC2P m%+IPZ2m //打印回应的头信息 ylf[/='0K public void logResponseHead(HttpURLConnection con) Sgb*tE)T { U7mozHS,:9 for(int i=1;;i++) PHg48Y"Nd { et,GrL)l String header=con.getHeaderFieldKey(i); /e\{
if(header!=null) ^ OJyN,A //responseHeaders.put(header,httpConnection.getHeaderField(header)); t-u|U(n Utility.log(header+" : "+con.getHeaderField(header)); =bh*[,- else ~H)4)r^ break; $v.C0 x } nm$Dd~mxW1 } Thy=yz;p $DFv30 f %,@vWmn public void splitterStop() R`Aj|C
z { wCs3:@UH
bStop = true; ~cAZB9Fa } ub0zJTFJ# k@>\LR/v yDb'7(3- } >e5 *prx+ !U_K&f |6:=}dE#[ /* $$i.O} **FileAccess.java .o%^'m"=D[ *//文件访问(定位,写) 7x]4`#u package NetFox; Sydh2d import java.io.*; ,7Y-k'7Kop a~h:qpgc n;HHogA public class FileAccessI implements Serializable{ n6WY&1ZE~ 3OyS8` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 LL^q1)o RandomAccessFile oSavedFile; P=N$qz$U long nPos; $FH18 r90+,aLM#? n>,L=wV public FileAccessI() throws IOException A% Q!^d { (9\;A*CZ this("",0); 6q<YJ., } yAT^VRbv {s?M*_{| 14eW4~Mr public FileAccessI(String sName,long nPos) throws IOException os3 8u!3- { CD j~;$[B oSavedFile = new RandomAccessFile(sName,"rw"); C#rc@r,F this.nPos = nPos; JE5 oSavedFile.seek(nPos); + Y.1)i} } _R|Ify#J B@Co'DV[/] \e=_
2^v!_ public synchronized int write(byte[] b,int nStart,int nLen) pD"vRbYF { f8 /'%$N int n = -1; i>L+gLW try{ Uk*IpP` oSavedFile.write(b,nStart,nLen); p Y)5bSA n = nLen; M`,~ mU } U=Y)V% catch(IOException e) 1[F3 Z { sRVIH A, e.printStackTrace (); C-eA8pYY/ } -Ue$T{;RoH eO=s-]mk h+.{2^x return n; =rA~7+} } /gcEw!JS !2\ r LN gyHHoZc3 } [sV"ws V!%jf:k IH48|sa /* ~\p]~qQ\K **SiteInfoBean.java MiT}L */ v dbO( package NetFox; `J<*9dq% ,&PE6hn MfO:m[s public class SiteInfoBean { 7`vEe'qz Z 2}ah Ft=zzoVKg private String sSiteURL; //Site's URL UsGa private String sFilePath; //Saved File's Path 5wB => private String sFileName; //Saved File's Name [L`ZE*z private int nSplitter; //Count of Splited Downloading File 0C<[9Dl.G8 :a8 YV!X 7qO a
;^T public SiteInfoBean() 6%`&+Lq {//nSplitter的缺省值为5 'C$XS>S //default value of nSplitter is 5 #1c]PX this("","","",5);
vr#+0:| } @Q&3L~K" I
+5)Jau^S )M=ioE8`h public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I&?Qq k { Xdi:1wW@p sSiteURL= sURL; ;Mm7n12z C sFilePath = sPath; 7A\Cbu2tf sFileName = sName; 7g=2Z[o this.nSplitter = nSpiltter; k$5 s{q 'ckQg=zPR ,y4I[[ } ZN"j%E{d LZPuDf~/ f-6vLX\Vu public String getSSiteURL() r`&-9"+ { ?1L.:CS return sSiteURL; [=O/1T } )}Q(Tl\$ Gir#"5F =U[3PC-N@ public void setSSiteURL(String value) HS'Vi9 { Er/bO sSiteURL = value; Ze<K=Q%(i } UT~a&u tqAd$:L s &Dg8$ public String getSFilePath() W{z.?$SH { G6VF>2 return sFilePath; }(a+aHH } O/:UJ( e{ )%rg?lI 7\_o.(g#- public void setSFilePath(String value) 4tg<iH{ { XxHx:mi sFilePath = value; w6`9fX6{h } 5tQ1fJze tg^sCxz9] RMO,ZVq public String getSFileName() ) 9, { 'c\iK=fl return sFileName; I%|>2}-_U } zYXV; f}guv~K =U|N=/y#hJ public void setSFileName(String value) 1+b{}d { '
|-JWH sFileName = value; e \O/H< } '=][J_ ~['Kgh_; /iG*)6*^k public int getNSplitter() Pxn,Qw* { 1[_mEtM:]B return nSplitter; w\)| } oJ#,XMKga at2FmBdu C $R<Me public void setNSplitter(int nCount) nRd)++ { I ZQHu h nSplitter = nCount; l
& Dxg } t|t#vcB } kd"N29 a^ ,(v G0E121`h /* ,C3,TkA] **Utility.java }kg ye2[ */ u!1{Vt87 package NetFox; 4k./(f2+ RN=` -*E1 R^{)D3 public class Utility { =4d (b ; HF|oBX$_ Spt?>sm public Utility() Y8flrM2CwG { 5zON}"EC IK*07h/! UGK*G y } %`Z!4L NnVnUgx //线程睡眠 (sWLhUgRX public static void sleep(int nSecond) phO;c;y} { E*i#?u try{ _X?^Cy Thread.sleep(nSecond); ctcS:<r/3@ } V|\7')Qq catch(Exception e) qZ@s#UiB { e%W$*f e.printStackTrace (); yCCrK@{oo } r(gXoq_w } !?Wp+e6 }@.|?2b + //日志 !A48TgAeE public static void log(String sMsg) ]qhPd_$?D' { ~/j\Z System.err.println(sMsg); 7gRgOzWfV } #Fyuf,hw4 LR"9D YuB+k^ public static void log(int sMsg) S*yjee<@ { BT}&Y6 System.err.println(sMsg); qWw\_S } $AHQmyg< } EqI(|bFwy =-p$jXVW% m.,U:> /* J4Dry< **TestMethod.java Mw9 \EhA */ [`
sL?&a package NetFox; #:SNHM^>< 4`,j =3 Dc)dE2 public class TestMethod { 1^gl}^|B Z1"v}g X.:]=,aGW public TestMethod() 2;w*oop,O { ///xx/weblogic60b2_win.exe 5h; +Ky!I try{ ~Jf{4*>y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); k1Q?'<` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j&k6O1_ SiteFileFetch fileFetch = new SiteFileFetch(bean); 0Fu~%~#E$ fileFetch.start(); 4>J
} y+7PwBo%e catch(Exception e){e.printStackTrace ();} '(/7[tJ Nz)l<S9> u{L!n$D7 } <_Q1k> d^`?ed\1 %j7XEh<' public static void main(String[] args) }l=xiAF { T1H"\+ new TestMethod(); fDSv?crv } 0]4(:(B } bJD;>"* 点击下载更多相关资料
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