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/* aU(.LC **SiteFileFetch.java ]6Iu\,#J */ hb;CpA package NetFox; Qg/FFn^Kg* import java.io.*; }lp37, import java.net.*; vcu@_N 1Dc fPD.np} ]YI9 public class SiteFileFetch extends Thread { Cqnuf5e>L gV.? Myy ;:bp?( SiteInfoBean siteInfoBean = null; //文件信息Bean oH=?1~e long[] nStartPos; //开始位置 2om:S+3)2 long[] nEndPos; //结束位置 ."ZG0Zg FileSplitterFetch[] fileSplitterFetch; //子线程对象 ppz3"5 long nFileLength; //文件长度 tsg`c;{ boolean bFirst = true; //是否第一次取文件 \#%GVru! boolean bStop = false; //停止标志 "Y<;R+z File tmpFile; //文件下载的临时信息 H14Q-2U1xa DataOutputStream output; //输出到文件的输出流 5 I_ :7$8 jm%s#`)g //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 7~P2q/2E> public SiteFileFetch(SiteInfoBean bean) throws IOException {*+J`H_G2a { -*mbalU,J siteInfoBean = bean; GPLop/6
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); fd *XK/h tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); sf2%WPK
if(tmpFile.exists ()) < +* { 0+iRgnd9? bFirst = false; Mbxl{M
> read_nPos(); GwF8ze+cH } H8w[{'Mei
else H(;@7dh { M#4;y,n<k nStartPos = new long[bean.getNSplitter()]; uEb:uENk'( nEndPos = new long[bean.getNSplitter()]; Ph
P)|P } `0ym3} (O ?rOj?J9 Fb1<Ic# nmiJ2edx } H_f8/H >/\TG8t,f T`@brL public void run() _}[WX[Le{ { 2
)o2d^^ //获得文件长度 424iFc[ //分割文件 {,5.svO //实例FileSplitterFetch v CsE|eMP //启动FileSplitterFetch线程 C<teZz8/w //等待子线程返回 `r1j>F7Xb try{ <k8WnA ~Fl if(bFirst) @,oc%m { SM)"vr_ nFileLength = getFileSize(); mRAt5a#is if(nFileLength == -1) 1p~ORQ { {wM<i System.err.println("File Length is not known!"); [nHN@p| } awR !=\ else if(nFileLength == -2) 1v:Ql\^cT { !+$QN4{9 System.err.println("File is not access!"); i
Ehc< } G HQ~{ else (&79}IEd { 8Y8bFWuc for(int i=0;i<nStartPos.length;i++) \y271}' { !D1#3?L nStartPos = (long)(i*(nFileLength/nStartPos.length)); qQ]fM$! } Qa/1*Mb for(int i=0;i<nEndPos.length-1;i++) <LH6my { r{?qvl!q nEndPos = nStartPos[i+1]; 6I(Y<LZ5 } ~Qif-|[V nEndPos[nEndPos.length-1] = nFileLength; *VXx\& } Q*Jb0f } M*n94L=Sg& 6H2Bf*i i{N?Y0YQs0 //启动子线程 fX:q] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; CB9:53zK9 for(int i=0;i<nStartPos.length;i++) E3p$^['vx { g:~q&b[q6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oMYFfnoAa siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3d;J"e+? nStartPos,nEndPos,i); VWt=9D; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !/H ` fileSplitterFetch.start(); 7Oe$Ou } 2sgp$r // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #s(ob `0| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @$kzes\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", WU=EJY}#n nEndPos = " + nFileLength); 5{+>3J // fileSplitterFetch[nPos.length-1].start(); HZ!<dy3 +68age;dM P//nYPyzg //等待子线程结束 4`o0?_.' //int count = 0; N!<l~[rc //是否结束while循环 S['%> boolean breakWhile = false; IAUc.VH 4gEw}WiP r/':^Ex while(!bStop) :{S@KsPqE { 6b2h\+AP write_nPos(); dg*xo9Xi` Utility.sleep(500); x]hG2on! breakWhile = true; T>*G1 -J# 3rZPVR$)) SR.xI:}4 for(int i=0;i<nStartPos.length;i++) gkTwGI+w {
!Q_Kil.9 if(!fileSplitterFetch.bDownOver) Lwm /[ { Nk%$;Si breakWhile = false; Omn$O> break; -;8 a* F } 9X1vL } "g"%7jK if(breakWhile) ;){ZM,Ox break; 6Rif&W.xy GU1cMe mW[w4J+7P //count++; IcqzMmb //if(count>4) @o}J ) // siteStop(); <o|k'Y(- } "5$p=| L`O7-'` #/9Y}2G|] System.err.println("文件下载结束!"); ? YIe< } bx6=LK catch(Exception e){e.printStackTrace ();} 6W]C` } v^t oe #ax% n )eSQce7H //获得文件长度 dci,[TEGu public long getFileSize() hWn-[w/l_ {
\%]lsml int nFileLength = -1; *\iXU//^) try{ tNqSCjQ~_c URL url = new URL(siteInfoBean.getSSiteURL()); J.g6<n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); x6\VIP"9L httpConnection.setRequestProperty("User-Agent","NetFox"); v13\y^t Mw+
l>92 6_rgRo& int responseCode=httpConnection.getResponseCode(); JX>`N5s if(responseCode>=400) $%&OaAg {
{pre|r\ processErrorCode(responseCode); (B@\Dw8^ return -2; //-2 represent access is error )VG>6x
} _~>WAm< }a UQ#x y'oH>l+n String sHeader; \ ux{J |Q%nnN
f/.f08 for(int i=1;;i++) !)J$f_88D { )"tM[~e` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2}.~
6EU/ //Utility.log(in.readLine()); n#?y;Y\ sHeader=httpConnection.getHeaderFieldKey(i); #IqRu:csp if(sHeader!=null) V!@6Nv { FSkX95 if(sHeader.equals("Content-Length")) 6"[,
{ x=\W TC nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); hSps9*y break; 0;w 4WJJ } siV]NI':| } sQrM"i0Y> else PF)s> break; j,i)ecZ> } #'i,'h+F } ofYZ!-V catch(IOException e){e.printStackTrace ();} h y\iot catch(Exception e){e.printStackTrace ();} R:^jQ'1 #c/K.? BOdlz#&s Utility.log(nFileLength); WkpHe W=HHTvK9Hh ]_!NmB_3 return nFileLength; \x\(36\u } @,G\`;Ma .M[t5I'\ xA*6Z)Y //保存下载信息(文件指针位置) AS4oz:B private void write_nPos() )T
slI { v`qXb$YW try{ 5VVU%STP output = new DataOutputStream(new FileOutputStream(tmpFile)); >B$ IrM7J output.writeInt(nStartPos.length); lEQj62zIQ for(int i=0;i<nStartPos.length;i++) iK5[P { }-Nc}%5 // output.writeLong(nPos); i\4YT r, output.writeLong(fileSplitterFetch.nStartPos); S%G&{5 output.writeLong(fileSplitterFetch.nEndPos); z 7cA5'c } a=B $L6*4 output.close(); %82:?fq } v[DxWs8q catch(IOException e){e.printStackTrace ();} xj]^<oi< catch(Exception e){e.printStackTrace ();} Efpju( } anKflt3 ?ZhBS3L TOvsW<cM //读取保存的下载信息(文件指针位置) nF,zWr[x private void read_nPos() ),%@X { mSEX?so=[ try{ EyV5FWb58 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L?Ih; int nCount = input.readInt(); V72?E%d0 nStartPos = new long[nCount]; 9D?JzTsyg nEndPos = new long[nCount]; \z@:OR, for(int i=0;i<nStartPos.length;i++) Wrm3U/>e { :hf%6N='kI nStartPos = input.readLong(); x97L>>| nEndPos = input.readLong(); W:}t%agis } ATV|M[B input.close(); &!+1GI9z
} <)L[V catch(IOException e){e.printStackTrace ();} 'RQEktm catch(Exception e){e.printStackTrace ();} &EC8{.7 } 4~vn%O6n %Go/\g 2c*}1
_ private void processErrorCode(int nErrorCode) Q}
-YD.bx3 { TTo?BVBK System.err.println("Error Code : " + nErrorCode); {yxLL-5c } oy=ej+: +R8dy m&MZn2u[4i //停止文件下载 kFfNDM#D public void siteStop() zvv/|z2(r { x_(K%0+Ca bStop = true; k~QmDq for(int i=0;i<nStartPos.length;i++) A'n7u'6= fileSplitterFetch.splitterStop(); W$z^U)|t NR^3
1&}It w[^lxq } po*r14f } B+c,3@)x //负责部分文件的抓取 =,s5>2 **FileSplitterFetch.java 1l.HQ IS */ -(#`JT8 package NetFox; 0OtUb:8LX c'bh`H4 R0GD9 import java.io.*; '^'PdB import java.net.*; ?uF3Q)rCk gU@R c48I-{? public class FileSplitterFetch extends Thread { D3+<16[, +}f}!h; h;OHpvk String sURL; //File URL T!1XL7 long nStartPos; //File Snippet Start Position {Bpu-R&T long nEndPos; //File Snippet End Position @G|z_ int nThreadID; //Thread's ID vU#>3[aC boolean bDownOver = false; //Downing is over E6?0/" boolean bStop = false; //Stop identical a{.-qp FileAccessI fileAccessI = null; //File Access interface }C
JK9*Z "2"2qZ*h} 8&7zV:= public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException AbX#wpp! {
"'Q~&B;@ this.sURL = sURL; +4[Je$qYa this.nStartPos = nStart; 0.U-
tg0 this.nEndPos = nEnd; (J
j'kW6G6 nThreadID = id; qMd4awB
R fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~x+&cA-0A2 } Saks~m7, C&.Q|S2_
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public void run() WvcPOt8Bp> { :;&3"- while(nStartPos < nEndPos && !bStop) 7lzmAih { ,Mn`kL<F Ai`0Ud,M@ hdbm8C3 try{ Ed#Hilk' URL url = new URL(sURL); VF~kjH2> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N1l^%Yf J httpConnection.setRequestProperty("User-Agent","NetFox"); }~v0o#
I String sProperty = "bytes="+nStartPos+"-"; NU3s^ 8\( httpConnection.setRequestProperty("RANGE",sProperty); h9&0"LHr Utility.log(sProperty); A%EGu4 ;a(7% AaM~B`B InputStream input = httpConnection.getInputStream(); 1f$1~5Z //logResponseHead(httpConnection); X9YbTN ;jmT5XzL #*"I?B/fd8 byte[] b = new byte[1024]; 8HWEObRY int nRead; K/!>[d while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2:1
kSR^Ky { A-u}&}l< nStartPos += fileAccessI.write(b,0,nRead); 8?hj}}H //if(nThreadID == 1) YG#{/;^nm) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
&/)To } X$SXDb~G [qxDCuxq y# IUDnRJ Utility.log("Thread " + nThreadID + " is over!"); CmtDfE bDownOver = true; [tJp^?6* //nPos = fileAccessI.write (b,0,nRead); 6^z):d#u } !*,m=*[3 catch(Exception e){e.printStackTrace ();} N1dM,H } |#22pq?RP } bKr73S9 0E^S!A7 |_16IEJ //打印回应的头信息 dF+:9iiAm public void logResponseHead(HttpURLConnection con) q)RTy|NJ^ { %)y-BdSp. for(int i=1;;i++) fLuOxYQbf { )24
1-b V String header=con.getHeaderFieldKey(i); 2))pB/ if(header!=null) 1HeE$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); JiX-t\V ~ Utility.log(header+" : "+con.getHeaderField(header)); q =26($ else U)_x(B3d/ break; 0He^r
&c3 } hhJs$c( } BHS8MV L@ @KU^B_{i (_Rl
f$D public void splitterStop() ;@< e ]Ft { gzp]hh@4 bStop = true; GAlM:> } @[O|n)7 P2
z~U `M ~-(,++ } 9Hs5uBe %}Z1KiRiX |N5|B Q(y$ /* g` 41d **FileAccess.java %WFZ&>en& *//文件访问(定位,写) YDGW]T]i ? package NetFox; v(Q-RR import java.io.*; E&\ 0+-Dw
R7Z! ynZfO2kf public class FileAccessI implements Serializable{ hJ~=eYK?J IGI$,C //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :\|<7n RandomAccessFile oSavedFile; y~py+:_ long nPos; <p#+('N` 3:3>k8 W9jxw4) public FileAccessI() throws IOException q) y<\cEO { P"Y7N?\]( this("",0); >'&|{s[m } ;x-]1 xx_ +3r4GEa
Z +w(B9rH public FileAccessI(String sName,long nPos) throws IOException 6f;20dn6 { m@g9+7 oSavedFile = new RandomAccessFile(sName,"rw"); KH9D}, this.nPos = nPos; =L,7~9 oSavedFile.seek(nPos); )_1;mc8B } +.66Ky`|[ WdT iao,r qyR}|<F8* public synchronized int write(byte[] b,int nStart,int nLen) J|DY
/v { _k Utj(re int n = -1; t:tIzFNv try{ \T^ptj(0 oSavedFile.write(b,nStart,nLen); @gjA8mL n = nLen; e^or qw/I } oN=>U"<\1 catch(IOException e) bA/'IF+ { g
?{o2gG e.printStackTrace (); :+meaxbu } cA B<'44R QJU\YH%} A%.ZesjAx return n; >]ZW.?1h } u Qz!of%x 1F{,Zr rch Kr w } __,F_9M !OMl-:KUzE /2:s g1 /* 1( rN **SiteInfoBean.java $[+)N~ */ T<o8lL package NetFox; ria.MCe\! m[Cp
G=32B #2?3B public class SiteInfoBean { \ 9#X]H oVIc^yk5a R dLk85<n private String sSiteURL; //Site's URL `':G92}# private String sFilePath; //Saved File's Path OF O,5 private String sFileName; //Saved File's Name mD;ioaE
private int nSplitter; //Count of Splited Downloading File !u|s8tN.U O@`KGZEPY ~SYW@o public SiteInfoBean() .FA99|: {//nSplitter的缺省值为5 )Qh*@=$- //default value of nSplitter is 5 axz.[L_elB this("","","",5); Zo}vV 2 } \-r"%@OkW R#HX}[Hb cs*"9nKl public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `a9iq> { il$eO 7 sSiteURL= sURL; |P7FPmn sFilePath = sPath; =JN{j2xY sFileName = sName; UZJ#/x5F this.nSplitter = nSpiltter; 'j\mz5#s DJ|lel/' =!IoL7x } _a zJ> }N"YlGY\Yn L`"V_
"Q#0 public String getSSiteURL() T%SK";PAU$ { +3Z+#nGtk return sSiteURL; nK#%Od{GF } .9vt<<Kwh MhIHfW]b 3rX40>Cs8 public void setSSiteURL(String value) dF*M"|[ { (6&"(}Pai sSiteURL = value; <,Mf[R2N> } C9*[/| T $GYy[8{:V
`cPZsL public String getSFilePath() bmJdZD7-<k { FsS.9
`B return sFilePath; =,8nfJ+x } Y7;=\/SV 5F#FC89Kk h.kjJF public void setSFilePath(String value) p!DOc8a.\e { RDEK=^J sFilePath = value; ]GD&EQ } ElK Md )a9C3-8Y' _%#Uh#7P$ public String getSFileName() a'r1or4 { k{U[ U1j return sFileName; `qRyh}Ax" } z m]R76 g |H 5
ed|]LP public void setSFileName(String value) P"o|kRO { A5Q4wy` sFileName = value; AQ,"):ofvT } ./^8L( \fp'=&tp~a }pGjc_:'] public int getNSplitter() q(A_k+NL { p_)ttcpi1 return nSplitter; q$"?P } bh#6yvpMR Q<KF<K'0hg 1
1(GCu public void setNSplitter(int nCount) L
>)|l { piqh7u3~ nSplitter = nCount; yXqC } <":83RCS } U@D\+T0 ~z")';I| #2"'tHf4 /* Mpco8b-b **Utility.java #lMC#Ld */ 2
/*z5 package NetFox; !6a;/ys Z Br.UN~q public class Utility { A/"2a55 TK%q}bK, 5NhAb$q2Y public Utility() ]&9=f#k% { GG-b)64h` h7@%}<% .J8 gW } \(;u[ #2$wI^O //线程睡眠 J<4_<.o(a public static void sleep(int nSecond) Gm \)1b { 1ox#hQBoS try{ 2|]
<U[ Thread.sleep(nSecond); ,4 q^( } ^f-)gZ& catch(Exception e) k\9kOZW { QDVSFGwr e.printStackTrace (); \I^"^'CP } y7+n*|H } D:?"Rf{) !%DE(E*'(
//日志 _n{_\/A6f public static void log(String sMsg) fY?:SPR+ { EyA(W;r. System.err.println(sMsg); B&y?Dc } r!w*y3 %tC[q Xwjm T public static void log(int sMsg) V~Z)^.6 { XD|Xd|/ { System.err.println(sMsg); uEG4^ }
5e1oxSU } Z;BEUtR
c rdtzz#7 ~66v.`K! /* A f!`7l- **TestMethod.java E:+r.r"Y */ ZNpC&
"`G package NetFox; A$n.'*gK !q$>6P fe"w--v public class TestMethod { >Z<ZT vILB$%I mwN"Cu4t public TestMethod() m7RyFnR2 { ///xx/weblogic60b2_win.exe .j"heYF) try{ x\yr~$}(J SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +JY8"a97> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Vpzjh,r-j SiteFileFetch fileFetch = new SiteFileFetch(bean); Y C<FKWc fileFetch.start(); L; A#N9 } ^,?>6O catch(Exception e){e.printStackTrace ();} ?iEn~9WCS rj4Mq:pJ g\?07@Zd| } g
4|ai*^ m=/HUt3(&0 p_e x public static void main(String[] args) $: 1/`m19 { Ov4 [gHy& new TestMethod(); 4>fj@X(3 } g>'6"p; } ~m0=YAlk? 点击下载更多相关资料
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