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/* =B1t?(" **SiteFileFetch.java aVuan&]*= */ nL^6{I~ package NetFox; 5:|5NX[.b import java.io.*; )Tngtt D import java.net.*; 9 N=KU PGT!HdX#{ Tv3 ZNh public class SiteFileFetch extends Thread { I>/`W 3D\.Sj% e^~t52] SiteInfoBean siteInfoBean = null; //文件信息Bean 9b]*R.x:$& long[] nStartPos; //开始位置 SfJ/(q long[] nEndPos; //结束位置 k;zbq FileSplitterFetch[] fileSplitterFetch; //子线程对象 0x# 6L long nFileLength; //文件长度 F)e*w:D boolean bFirst = true; //是否第一次取文件 "+nURdicO boolean bStop = false; //停止标志 hv*n";V File tmpFile; //文件下载的临时信息 oZ6xHdPc4 DataOutputStream output; //输出到文件的输出流 f;u;hQxs Sc Gmft3A //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9Lz)SYd public SiteFileFetch(SiteInfoBean bean) throws IOException r_)-NOp { z('93vsO siteInfoBean = bean; MBcOIy[&A //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); XP2=x_"y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2!68W
X if(tmpFile.exists ()) 1I3u~J3]/ { l0D.7>aj bFirst = false; .NjdkHYR read_nPos(); ec1g7w-n } `H/HLCt else |&n dQ(!l { AaTtYd nStartPos = new long[bean.getNSplitter()]; O-T/H-J` nEndPos = new long[bean.getNSplitter()];
u.hnQsM } R~RY:[5?w *kyy''r (-dJ0!
qwFn(pK[ } vo71T<K fil6w</L 73}k[e7e public void run() <S$y=>.9 { w5n>hz_5 //获得文件长度 nj7Ri=lyS //分割文件 w5|@vB/pj //实例FileSplitterFetch '2[ _U&e //启动FileSplitterFetch线程 -m'a%aog //等待子线程返回 ?U-p
jjM try{ '[-H].-! if(bFirst) ^;@Bz~Z { '3hvR4P nFileLength = getFileSize(); )1x333.[c if(nFileLength == -1) 0l 3RwWj { /-|xxy System.err.println("File Length is not known!"); $ @1&G~x } >MQW{^ else if(nFileLength == -2) -IX;r1UD { 5,Q('t#J System.err.println("File is not access!"); 8#Z$}?W } !uO|T'u0a else e:7aVOm { 9 oq(5BG, for(int i=0;i<nStartPos.length;i++) cQ+,F2 { :He:Bdk nStartPos = (long)(i*(nFileLength/nStartPos.length)); p$9N}}/c } ~o #
NOfYi for(int i=0;i<nEndPos.length-1;i++) .{ x5(bi0S { ;( 2uQ#Y nEndPos = nStartPos[i+1]; q"52-42 } b/5~VY*T nEndPos[nEndPos.length-1] = nFileLength; tQl= } nQ~q-=,L } uwQ4RYz .FMF0r>l
D1g1"^~g //启动子线程 uo%O\}#u9 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; \pPq]k for(int i=0;i<nStartPos.length;i++) t]&n_]`{. { ^9{ 2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "t\9@nzdX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), IS=)J( 0 nStartPos,nEndPos,i); *M`[YG19!e Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q?0goL fileSplitterFetch.start(); 5cE[s<= } Xif`gb6` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "R30oA#m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #F{|G:\@[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", u8,T>VNVw nEndPos = " + nFileLength); f
Fz8m // fileSplitterFetch[nPos.length-1].start(); jcG4h/A XqwdJND Sv>aZ //等待子线程结束 x)Th2es\ //int count = 0; %vThbP#mR| //是否结束while循环 _9gn;F boolean breakWhile = false; ftH
0aI CNN?8/u!@ d*AV(g#B while(!bStop) 1)Ag|4 { q;AQ6k( write_nPos(); ;;`KkNysm Utility.sleep(500); <_Lo3WGwc breakWhile = true; q{5Vq_s\ OB^ &a(w0< for(int i=0;i<nStartPos.length;i++) 4Sl^cKb$7 { eo,]b1C2n if(!fileSplitterFetch.bDownOver) 6/n;u{| { mcR!P~"i breakWhile = false; Ebk@x=E break; pucHB<R@bL } V('b|gsEo } 0ib 6}L% if(breakWhile) p,0 \NUC break; 7yj2we v m$v[ zld>o3K} //count++; 2>r.[ //if(count>4) @6Mo_4)O // siteStop(); U!`'Qw; } *K 7L5. x$p\ocA }hf*Jw
System.err.println("文件下载结束!"); =0-qBodbl } H9Z3.F(2 catch(Exception e){e.printStackTrace ();} KWY G\#S0] } ^49moC- g[n8N{s Lr~K3nb //获得文件长度 ?t"PawBWE public long getFileSize() ditzl(L { x?F{=\z/o int nFileLength = -1; 0CR;t`M@ try{ ;|%r!!#-t URL url = new URL(siteInfoBean.getSSiteURL()); d"cfSH;h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (M=Br httpConnection.setRequestProperty("User-Agent","NetFox"); uXC?fMWp. O*PHo_&G )
jvkwC int responseCode=httpConnection.getResponseCode();
zhe5i;M if(responseCode>=400) -I*A `M { t5qAH++axN processErrorCode(responseCode); s [!SG`& return -2; //-2 represent access is error j
AE0$u~. } W7
E-j+2 z~_\onC |)_R
bqZ String sHeader; %xruPWT:k r/v&tU +OmSR*fA0 for(int i=1;;i++) SrtmpQ { izw}25SW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h.^DRR^S //Utility.log(in.readLine()); R;yAqr29 sHeader=httpConnection.getHeaderFieldKey(i); E6gEP0b if(sHeader!=null) 2uTa}{/% { ww2Qa-K if(sHeader.equals("Content-Length")) Ss:,#| { +g[B &A!d+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K_aN7?#.v` break; a8 1%M } rifxr4c[X> } 9|`@czw else #jJcgR< break; MocH>^, } &1{k^>oz } m [g}vwS catch(IOException e){e.printStackTrace ();} dNobvK catch(Exception e){e.printStackTrace ();} Y<+4>Eh |gz,Ip{ SDwSlwf Utility.log(nFileLength); H^g<`XEgw C] w< &o 6~S0t1/t? return nFileLength; U!5*V9T~J } (n/1:' OKVYpf <&2,G5XA //保存下载信息(文件指针位置) =1VH5pVr} private void write_nPos() gT
OMD { lo: ~~l try{ ^IH1@ output = new DataOutputStream(new FileOutputStream(tmpFile)); qrc/Q;$ output.writeInt(nStartPos.length); [//f BO for(int i=0;i<nStartPos.length;i++) \sd"iMEi { OpLSjr // output.writeLong(nPos); N 3c*S"1 output.writeLong(fileSplitterFetch.nStartPos); }hYE6~pr output.writeLong(fileSplitterFetch.nEndPos); G,-OH-M! } j%;)CV
G" output.close(); F21[r!3 } Z L</ catch(IOException e){e.printStackTrace ();} ([*t. catch(Exception e){e.printStackTrace ();} DcA'{21 } !&lPdEc@T njMy&$6a## ~P_kr'o //读取保存的下载信息(文件指针位置) ]Qr8 wa>Z private void read_nPos() ;l ()3; { LDeVNVM try{ GJs[m~`8# DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); c!Vc_@V, int nCount = input.readInt(); J36@Pf]h nStartPos = new long[nCount]; L@r.R_*H?s nEndPos = new long[nCount]; sV[Z|$&Z for(int i=0;i<nStartPos.length;i++) Xb*_LZAU { h\d($Ki nStartPos = input.readLong(); PEEY;x nEndPos = input.readLong(); QtQ^"d65 } x Ui!|c input.close(); ;;!{m(;LS} } o(/ia3 catch(IOException e){e.printStackTrace ();} o$VH,2 QF catch(Exception e){e.printStackTrace ();} >;v0zE } ;|QR-m2/ acY[?L_6J p0y?GNQ private void processErrorCode(int nErrorCode) f+Me dc~ { W;dzLgc System.err.println("Error Code : " + nErrorCode); 2gAdZE&Y } ,jsx]U/^ Z(mn
U;9{v O^weUpe\ //停止文件下载 YO$b# public void siteStop() @ ^cgq3H' { [;?{BB bStop = true; )]>
'7] i for(int i=0;i<nStartPos.length;i++) kZ-~
;fBe fileSplitterFetch.splitterStop(); 8'"/gC{ %@93^q[\2 n "KJB } _np>({ } Uv`v|S:+2 //负责部分文件的抓取 jjT2k **FileSplitterFetch.java MZW
Y */ 0C+yq'D~[ package NetFox; X]MM7hMuR [e@OHQM P8 ,jA<W import java.io.*; ,
)pt_"-XA import java.net.*; H0 n@kKr _8pkejg s*/ G-
lY public class FileSplitterFetch extends Thread { 36WzFq# '3UIriY6 sk6|_ String sURL; //File URL ,tF" 4|# long nStartPos; //File Snippet Start Position ^%$W S, long nEndPos; //File Snippet End Position soQzIx int nThreadID; //Thread's ID n;^k boolean bDownOver = false; //Downing is over 7W firRM boolean bStop = false; //Stop identical 9Q7cUoxY FileAccessI fileAccessI = null; //File Access interface OGi4m | | ,l=v`/ sFM>gG public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException n[:AV { Q0uO49sg this.sURL = sURL; YZ:'8< this.nStartPos = nStart; m\Fb , this.nEndPos = nEnd; 5`'au61/2 nThreadID = id; T{{AZV"pB fileAccessI = new FileAccessI(sName,nStartPos);//定位 MY*>)us\ } +6)kX4 2j/1@Z1j= \3(|c#c public void run() UH,4b`b { +fCyR while(nStartPos < nEndPos && !bStop) k&_u\D"^"% {
!QW 0 >`?+FDOJ, VmH_0IM^6 try{ V<NsmC=g URL url = new URL(sURL); b:5%} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [xs)u3b httpConnection.setRequestProperty("User-Agent","NetFox"); QRZTT qG String sProperty = "bytes="+nStartPos+"-"; 9Glfi@. httpConnection.setRequestProperty("RANGE",sProperty); Ysc|kxLb Utility.log(sProperty); VDu
.L8 aU]O$Pg{ p9 ,\ {Is InputStream input = httpConnection.getInputStream(); q,,>:]f# //logResponseHead(httpConnection); $s(4?^GP qTa]th; lp0T\
% byte[] b = new byte[1024]; ]7R&m)16 int nRead; nK%/tdq while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) n.Eoi4jV' { vb. Y8[ nStartPos += fileAccessI.write(b,0,nRead); a(43]d& //if(nThreadID == 1) i_'R"ob{S // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "tz0ko,( } p5# P
r ]^6y NtLK ~)m t &
Utility.log("Thread " + nThreadID + " is over!"); qqt.nrQ^ bDownOver = true; NZ+?Ydr8k //nPos = fileAccessI.write (b,0,nRead); 'oHOFH9:{b } voej ~z+ catch(Exception e){e.printStackTrace ();} CWe>jlUQ } Zc\h15+P } A]O5+"mc #9hXZr/8 QOh w //打印回应的头信息 mLk6!&zN public void logResponseHead(HttpURLConnection con) XAULD]Q { lF}$`6 for(int i=1;;i++) i h$@:^\ { Aiks>Cyi23 String header=con.getHeaderFieldKey(i); ~ut& U if(header!=null) ug6f
//responseHeaders.put(header,httpConnection.getHeaderField(header)); xlPcg7 Utility.log(header+" : "+con.getHeaderField(header)); K.iH else Yr"!&\[oz break; q{De&Bu } &b@!DAwAJ } 9p\wTzA 1nlE3Y?AV {7![3`%7 public void splitterStop() {?>bblw/d { AR+\uD=\I- bStop = true; s?G'l=CcKu } jQ_|z@OV 5nxS+`Pn.) N9JgV,` } M8",t{7 8NAWA3^B XC/]u%n8]( /* ?;r8SowZ7 **FileAccess.java X.T\=dm%v *//文件访问(定位,写) =6Kv` package NetFox; %M;_(jda import java.io.*; rMXOwkE /!{A=N ]g8i>,G public class FileAccessI implements Serializable{ 4Fr7jD,#k
$`XN //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 FG;<`4mY RandomAccessFile oSavedFile; B=Zukg1G long nPos; hV>4D&< @cS1w'= sx-Hw4.a" public FileAccessI() throws IOException I"F
.%re { ><#2O this("",0); mS)|6=Y } vzohq1r5 &`
00/p g@k#J"Q'[ public FileAccessI(String sName,long nPos) throws IOException y[^k*,=
9 { ]4 K1%ZV oSavedFile = new RandomAccessFile(sName,"rw"); .n)!ZN this.nPos = nPos; az\<sWb# oSavedFile.seek(nPos); S-M)MCL } !}L~@[v,uL i>]<*w Av;q:x? public synchronized int write(byte[] b,int nStart,int nLen) P+;CE|J`X { B.Zm$JZ: int n = -1; veX"CY`hn try{ z*dQIC oSavedFile.write(b,nStart,nLen); e0~sUVYf n = nLen; 1o;g1Z/ } n2jvXLJq catch(IOException e) 2 <6`TA*m { ax72e hL} e.printStackTrace (); ~_l6dDJ } ySixYt y;{^Ln4{ c9*1$~(v0I return n; x:A-p..e } ?2?S[\@`0U `\ W , N@Yk. } H4}%;m% HvqF@/xh E VN-<=i^ /* j]!7B HC **SiteInfoBean.java +&7[lsD*
*/ '#,e
@v package NetFox; B0b[p*gIl (<bm4MPf d%#!nq{vd public class SiteInfoBean { m?D
<{BQ; tp6csS,
c%AFo]H private String sSiteURL; //Site's URL .)"_Q/q
private String sFilePath; //Saved File's Path S1 EEASr!} private String sFileName; //Saved File's Name [5?4c'Ev private int nSplitter; //Count of Splited Downloading File 2qs>Bshf VxkCK02k z.2r@Psk public SiteInfoBean() (|0.m8D~D {//nSplitter的缺省值为5 BR& Aq //default value of nSplitter is 5 hzT{3YtY2 this("","","",5); nabBU4;h } 99l>CYXd /~3N@J y*VQ]aJ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) KA 5~">l { AW,v sSiteURL= sURL; V;h=8C 5J sFilePath = sPath; ,:#,}w_HyO sFileName = sName; >63)z I this.nSplitter = nSpiltter; <*s"e)XeqF ^[{`q9A#d
G"o!} } S=0"f}Jo. \H Wcd| EJf #f public String getSSiteURL() :]P~.PD5, { _BZ1Vnv return sSiteURL; CQ6'b,L& } kzZDtI) q"gqO%Wb| qP~WEcH`[ public void setSSiteURL(String value) ,?l~rc { _j:UGMTi(U sSiteURL = value; R)0N0gH } \~JNQ&_o +h0PR? s kN9O"^A public String getSFilePath() $> "J"IX { k:b/Gq` return sFilePath; Q~Ay8L+ } v,/[&ASz yXJ]U
\ % J|VK P7 public void setSFilePath(String value) X}ZlWJ { ;B&^yj&; sFilePath = value; BjJ,"sT } K)\(wxv 4p.^'2m PG{i,xq_B{ public String getSFileName() ?b||Cr { >Bc>IO return sFileName; D`6iDit } s}6+8 fE" QX[Djz0H8 n[!;yO public void setSFileName(String value) ;Vg^!]LL# { 1EVfowIl sFileName = value; ^>C11v } =96G8hlT Zp?4uQ)[W 7ftR4 public int getNSplitter() ,4[dLWU { 4&Byl85q return nSplitter; !c% } lC0~c=?J Q"40#RFA O~V1Ywfq7^ public void setNSplitter(int nCount) A (Bk@; { {m[s<A( nSplitter = nCount; n-DaX
kK } pet~[e%! } JIzY,%`\ }91*4@B7 3y99O
$EAc /* KU-'+k2s;p **Utility.java &VDl/qnaL */ 2d*_Qq1 package NetFox; \K;op2 4'' ,6KJ@ yL6^\x public class Utility { nX|Q~x] H@GE)I>^@ NUCiY\td public Utility() U&X2cR &a { YutQ ]zYA. @5xu>g Kn (Yv{{mIy } B
MM--y@ T-'~? [v //线程睡眠 ;f:gX`"\ public static void sleep(int nSecond) ^i+[m { l<(cd, try{ En(7(qP6} Thread.sleep(nSecond); H3, ut } 8-m
3e catch(Exception e) DECB*9O^ { xACdZB( e.printStackTrace (); 7Y1GUIRa3 } r`jWp\z } %Tv^GP{} gY(1,+0- //日志 `0{ S3v public static void log(String sMsg) 5,1{Tv` { U&UKUACn" System.err.println(sMsg); Bq@zaMv } iib 5u r)uz]w8 UZGDdP public static void log(int sMsg) }g|nz8 { 5{d\uE%'p System.err.println(sMsg); %d1draL } |t))u`~ } *RWm47 /)EY2Y' EF#QH
_X /* 87V1#U ^ **TestMethod.java lwT9~Hyp */ D'b#,a;V package NetFox; %T!J$a)qf ?P/AC$:|I 6BocGo({ public class TestMethod { tu0aD%C \}5p0.= nPN?kO=] public TestMethod() JN4fPGbV { ///xx/weblogic60b2_win.exe {^}0 G^ try{ ]E3<UR SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ('C7=u&F //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); fuUm}N7 SiteFileFetch fileFetch = new SiteFileFetch(bean); @*>Sw>oet fileFetch.start(); C$d>_r } }^-<k0A4? catch(Exception e){e.printStackTrace ();} 4nqoZk^R ibpzeuUl @?kM'*mrZM } $g10vF3 D\1k.tI >\2:\wI public static void main(String[] args) kL>d"w { hePPxKQ- new TestMethod(); ?+0GfIV } At6qtoPRA } 1[;;sSp 点击下载更多相关资料
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