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/* `< y[V **SiteFileFetch.java i2b\`
805 */ [a;lYsOsJ package NetFox; )Y~q6D K import java.io.*; hXS'*vO" import java.net.*; bf3LNV| "n
'*_rh>+ 9<<$uf.B public class SiteFileFetch extends Thread { 0<{/T*AU: mquna"}N &dvJg SiteInfoBean siteInfoBean = null; //文件信息Bean `{I,!to long[] nStartPos; //开始位置
3@$h/xMJ long[] nEndPos; //结束位置 9}X3Q!iFb FileSplitterFetch[] fileSplitterFetch; //子线程对象 mL+}Ka long nFileLength; //文件长度 8s8q`_.)( boolean bFirst = true; //是否第一次取文件 uW;Uq=UN boolean bStop = false; //停止标志 =B1t?(" File tmpFile; //文件下载的临时信息 4q@o4C<0 DataOutputStream output; //输出到文件的输出流 b7v] g]* wd*T"V3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F-k1yZ?^ public SiteFileFetch(SiteInfoBean bean) throws IOException MS^,h>KI { u!g=>zEu siteInfoBean = bean; [gzU/: //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3~I<f^K4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 9YHSL[ if(tmpFile.exists ()) SfJ/(q { k;zbq bFirst = false; 2EE/xnwX read_nPos(); F)e*w:D } "+nURdicO else hv*n";V { oZ6xHdPc4 nStartPos = new long[bean.getNSplitter()]; f;u;hQxs nEndPos = new long[bean.getNSplitter()]; Sc Gmft3A } 9Lz)SYd qCgP8U/jv z('93vsO nS?HH6H } XP2=x_"y 2!68W
X 1I3u~J3]/ public void run() l0D.7>aj { a0)+=*$ //获得文件长度 ec1g7w-n //分割文件
4EB$e? //实例FileSplitterFetch q(.%f3( //启动FileSplitterFetch线程 `H/HLCt //等待子线程返回 Cy6[p try{ |&n dQ(!l if(bFirst) AaTtYd { O-T/H-J` nFileLength = getFileSize(); n^&QOII@> if(nFileLength == -1) R~RY:[5?w { 9U}EVpD System.err.println("File Length is not known!"); (-dJ0!
} ,eUMSg~P.7 else if(nFileLength == -2) vo71T<K { MiRH i<g0 System.err.println("File is not access!"); \TMRS( } <S$y=>.9 else Ur&: Rr { 8QC:ro for(int i=0;i<nStartPos.length;i++) w5|@vB/pj { P#ru-0DD nStartPos = (long)(i*(nFileLength/nStartPos.length)); -m'a%aog } L6 _Sc-sU for(int i=0;i<nEndPos.length-1;i++) w4L\@y3 { ^;@Bz~Z nEndPos = nStartPos[i+1]; n+uq|sYVa } )1x333.[c nEndPos[nEndPos.length-1] = nFileLength; (OG@]|- } /-|xxy } mz\m^g3 >MQW{^ -IX;r1UD //启动子线程 5,Q('t#J fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8#Z$}?W for(int i=0;i<nStartPos.length;i++) !uO|T'u0a { e:7aVOm fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9 oq(5BG, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cQ+,F2 nStartPos,nEndPos,i); :He:Bdk Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p$9N}}/c fileSplitterFetch.start(); ~o #
NOfYi } .{ x5(bi0S // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;( 2uQ#Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); q"52-42 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ;=^WIC+Nr nEndPos = " + nFileLength); tQl= // fileSplitterFetch[nPos.length-1].start(); q0c)pxD%` i;dr(c/ft ,MvvW{EY //等待子线程结束 MPL2#YU/a //int count = 0; / TJTu_# //是否结束while循环 \'p7,F{:>5 boolean breakWhile = false; W}=2?vHV= ]iNSa{G v#/,,)m while(!bStop) lJYv2EZ { \uPT-M* write_nPos(); 6|jE3rHw Utility.sleep(500); 3t_5Xacj breakWhile = true; &Y#9~$V= HE,wEKp A|a\pL` @ for(int i=0;i<nStartPos.length;i++) 3=K-+dhk|t { Ys3C'Gc if(!fileSplitterFetch.bDownOver) G:&Q)_ { l{pF^?K breakWhile = false; Z$hxo)| break; U)l>#gf8 } /KV@Ce\ } _|Dt6 if(breakWhile) !EW]:u break; ~ZDdzp> Q@j:b]Y9 q{5Vq_s\ //count++; OB^ //if(count>4) {U<htl4 // siteStop(); 4Sl^cKb$7 } eo,]b1C2n 6/n;u{| mcR!P~"i System.err.println("文件下载结束!"); 4{Ak| } pucHB<R@bL catch(Exception e){e.printStackTrace ();} V\xQM; } ?nn,RBS- Pb`sn5; #,9|Hr% //获得文件长度 bQ4 }no0 public long getFileSize() =1JRu[&]8 { o._^ int nFileLength = -1; |JDJ{;o try{ nbRg<@ URL url = new URL(siteInfoBean.getSSiteURL()); UM]wDFn'E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DxD0iJ=W httpConnection.setRequestProperty("User-Agent","NetFox"); FG(`&S+, @]7\.>) ynd}w
G' int responseCode=httpConnection.getResponseCode(); oy'+n- if(responseCode>=400) @Uu\x~3y { E:tUbWVp processErrorCode(responseCode); rTJWftH! return -2; //-2 represent access is error 8]L.E } R.QcXz?d ?t"PawBWE 3HiW1*5W String sHeader; x?F{=\z/o p?h;Sv/ ;|%r!!#-t for(int i=1;;i++) I"!{HnSG` { :({<"H)!' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4CCux4)N //Utility.log(in.readLine()); JQCwI`%i sHeader=httpConnection.getHeaderFieldKey(i); !K2[S
J if(sHeader!=null) RAxz+1JT { &sWyh[`P if(sHeader.equals("Content-Length")) kr/h^e { loB/w{r*x nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); j
AE0$u~. break; ,jWd?-NH } X>4`{x ` } -jy"?]ve. else Rju8%FRO break; {3Rax5Ty } ^/uGcz|. } Rb0{t[IU catch(IOException e){e.printStackTrace ();} tvUvd(8w catch(Exception e){e.printStackTrace ();} }X?*o`sW WWLVy( _7<U[63 Utility.log(nFileLength); d7P @_jO6 ba ?k:b KWUz]>Z return nFileLength; 0_EF7`T } *X #e ^m=%Ctu# >KPJ74R //保存下载信息(文件指针位置) ,W-0qN&%/ private void write_nPos() X3nhqQTZ { g2]-Q. try{ O /&%`&2 output = new DataOutputStream(new FileOutputStream(tmpFile)); $5IrM7i output.writeInt(nStartPos.length); QhUraZ for(int i=0;i<nStartPos.length;i++) 75HL { .g~@e_;): // output.writeLong(nPos); a\w|tf output.writeLong(fileSplitterFetch.nStartPos); o~K 2K5I output.writeLong(fileSplitterFetch.nEndPos); -(.7/G'Vk> } $yAfs3/%)s output.close(); QFPx4F7(e } c
v
9
6F catch(IOException e){e.printStackTrace ();} >N
J$ac catch(Exception e){e.printStackTrace ();} WdAGZUp } Mvv=)?: u^9c` "Zk6B"o) //读取保存的下载信息(文件指针位置) av?BpN"l private void read_nPos() yh:,[<q { cZ >W8{G try{ L'Zud,JKg DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3c3Z"JV int nCount = input.readInt(); ^j %UZ nStartPos = new long[nCount]; nS4S[|w" nEndPos = new long[nCount]; pG6-.F; for(int i=0;i<nStartPos.length;i++) gpWS_Dw9 { [R> nStartPos = input.readLong(); ][nUPl nEndPos = input.readLong(); P{eRDQ= } @W8}N|jek input.close(); oNZW#<K } l`&6W?C catch(IOException e){e.printStackTrace ();} c5e\ckqm^ catch(Exception e){e.printStackTrace ();} [r8 d+ } MF}Lv1/[-J >EtP^Lu~f_ HW726K* private void processErrorCode(int nErrorCode) dA/o4co { 2H[aY%1T System.err.println("Error Code : " + nErrorCode); Nh9!lB m*] } ]ECZU e0HP~&BRs !d.>r
7w //停止文件下载 !^fR8Tp9 public void siteStop() dY<#a,eS { ; ZV^e bStop = true; ;|QR-m2/ for(int i=0;i<nStartPos.length;i++) acY[?L_6J fileSplitterFetch.splitterStop(); v:MS0] 2TEeP7 RCYbRR4y } "n }fEVJ, } Q+(:n)G_6E //负责部分文件的抓取 /'6[*]IZP **FileSplitterFetch.java 9Fx z!-9m */ Ko)T>8: package NetFox; T zYgH 43=-pyp ?]D+H%3[$i import java.io.*; y%bqeo
L~ import java.net.*; Os 2YZ<t D{c>i`\G BJxmW's/ public class FileSplitterFetch extends Thread { %@93^q[\2 NoZ4['NI\ _np>({ String sURL; //File URL Uv`v|S:+2 long nStartPos; //File Snippet Start Position jjT2k long nEndPos; //File Snippet End Position 9~'Ip7X,! int nThreadID; //Thread's ID
MVP)rugU boolean bDownOver = false; //Downing is over "Vp:z V<S boolean bStop = false; //Stop identical -!G#")< FileAccessI fileAccessI = null; //File Access interface 9c}]:3#XO `AHNk7 t= 5zw23! public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException )|R0_9CLV { JS?l?~ this.sURL = sURL; [pgkY!R?) this.nStartPos = nStart; ":#x\; this.nEndPos = nEnd; w^E]N nThreadID = id; x ETVtq fileAccessI = new FileAccessI(sName,nStartPos);//定位 R
4QwWSBJ } zw0 r
i6 W#7-%oT =tRe3o0( public void run() -sH.yAvC6 { 8tRhV2 while(nStartPos < nEndPos && !bStop) +Y9D!=_lj { eKpxskbhZ _<F@(M5 ?Wz(f {Hm try{ "jJdUFN URL url = new URL(sURL); 9hLmrYNM1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); r]EZ)qp^@ httpConnection.setRequestProperty("User-Agent","NetFox"); X:-bAu}D String sProperty = "bytes="+nStartPos+"-"; PSqtZN httpConnection.setRequestProperty("RANGE",sProperty); $_7d! S" Utility.log(sProperty); r]//Q6|S nB Iv{ '`~(Fkj InputStream input = httpConnection.getInputStream(); `{Di* //logResponseHead(httpConnection); p9}c6{Wp $17
v, 4U
a~*58 byte[] b = new byte[1024]; ="w8U' int nRead; (VI* c!N while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h:Mn$VR, { p C2c(4 nStartPos += fileAccessI.write(b,0,nRead); lyH X#] //if(nThreadID == 1) V?V)&y] 4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Nw$[a$^n } ^AjYe<RU} '"fU2M<. nP{sCH 1 Utility.log("Thread " + nThreadID + " is over!"); Z=Y_;dS9 bDownOver = true; q,,>:]f# //nPos = fileAccessI.write (b,0,nRead); \%?8jQ'tX } t"bPKFRy9E catch(Exception e){e.printStackTrace ();} b}*@=X=4o } I1 R\Ts@ } @1SKgbt> 031.u<_ 5nM9!A\D //打印回应的头信息 >-|90CSdSJ public void logResponseHead(HttpURLConnection con) <
J<;?%] { ic{.#R.BY for(int i=1;;i++) +yP[(b/ { 8&A|)ur4 String header=con.getHeaderFieldKey(i); 3| '#n[3 if(header!=null) JXRf4QmG //responseHeaders.put(header,httpConnection.getHeaderField(header)); (zw=qbS& Utility.log(header+" : "+con.getHeaderField(header)); wI]R+. else
k E#_Pc break; L[D/#0qp } Rr;LV<q+ }
vD)A) T.w}6?2 $L&9x3+?Kg public void splitterStop() B[/['sD { LY88;*:S bStop = true; e<O;pM: } Fb{`a[& >upXt? Aiks>Cyi23 } ~ut& U ug6f
tp0!,ne* /* e"s {_V **FileAccess.java w{zJE]7 *//文件访问(定位,写) C`th^dqBV package NetFox; B:A1W{l import java.io.*; k.=S+#"} (|a$N.e&K R!V5-0% public class FileAccessI implements Serializable{ U ygw*+ w(e+o.: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 2) /k`Na RandomAccessFile oSavedFile; .iP G /e long nPos; leb^,1/D6 zmL~]!~& fBWJ%W public FileAccessI() throws IOException 5Du>-.r { K7[AiU_I this("",0); X@h^T>[" } LcpyW=)}"V =S[FJaIu7 6Er0o{iI public FileAccessI(String sName,long nPos) throws IOException e2-70UvW^ { (9YYv+GGd* oSavedFile = new RandomAccessFile(sName,"rw"); |<$<L`xoe this.nPos = nPos; O2'bNR oSavedFile.seek(nPos); B
)1<`nJA } msqxPC^I _L:i=.hxN 5fj public synchronized int write(byte[] b,int nStart,int nLen) bDh:!M { ]lB3qEn< int n = -1; .XLV:6 try{ T)Zt'M oSavedFile.write(b,nStart,nLen); yjOu]K:X n = nLen; An8%7xa7 } =ve*g& catch(IOException e) .^W\OJ`G { (Xr_ np @ e.printStackTrace ();
ENYF0wW } 9#EHXgz Q0L@.`~ m>abK@5na return n; 7{Ki;1B[w } P"V{y|2 ,.6J6{ }W__ffH } J2oWssw" dY4k9p8 iBtjd`V* /* [`hE^chd **SiteInfoBean.java {#w A!>. */ 6m-:F.k1( package NetFox; rt 3f7 s* f- k|w%R@ { /F rs*AF public class SiteInfoBean { Mf;|z0UX U=&^H!LVY ]8xc?*i8 private String sSiteURL; //Site's URL c4ZuW_&: private String sFilePath; //Saved File's Path T<TcV9vM private String sFileName; //Saved File's Name _X,[]+ziu% private int nSplitter; //Count of Splited Downloading File /slm
]' *gM,x4 Y EI=Naq public SiteInfoBean() V>FT~k_" {//nSplitter的缺省值为5 d4y9AE@k //default value of nSplitter is 5 JGk3b=K this("","","",5); f.aB?\"f6 } Uw2,o|=O |b$>68: $S6HZG:N public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }XGMa?WR { Z{,GZT sSiteURL= sURL; 3wN?|N sFilePath = sPath; Yo~LckFF sFileName = sName; "wnpiB} this.nSplitter = nSpiltter; ;t;Y.*&=S ?fbgU @pF
fpHq?> } 5|<yfk8*J M#\ < E[|s>Xv~ public String getSSiteURL() %]a
@A8o0 { k#axt
Sc return sSiteURL; Snc;p } 99l>CYXd /~3N@J y*VQ]aJ public void setSSiteURL(String value) KA 5~">l { ]^J+-c sSiteURL = value; v`#j } ,:#,}w_HyO qj~flw1: c;:">NR public String getSFilePath() \)OZUch { u* t,i` return sFilePath; NJ;"jQ- } g$*/XSr( fm(mO% @4IW=V public void setSFilePath(String value) up\oWR: {
0dgP sFilePath = value; b]!9eV$ } G(U 9rJ9 doP$N3Zm v ! 7s
M public String getSFileName() _GVE^yW~z { U@Z>/ q return sFileName; nNt*} k } yfmp$GO: o&(wg(Rv 8YuJ8KC public void setSFileName(String value) D(y+1^> {
f~w>v sFileName = value; wP[xmO-% } NH7`5mF$ A/q2g7My yJ!OsD public int getNSplitter() Z[",$Lt { KcC!N{ return nSplitter; T vrk^! } (GCG/8s Iz
DG&c ?Bo?JMV public void setNSplitter(int nCount) OFc\fW# { x^A7'ad0 nSplitter = nCount; ""co6qo#> } 1HMUHZT } >\V6+$cNp ]UDd :2yt zVSx$6eiU /* f}^I=pS& **Utility.java \+-zRR0 */ +' %@! package NetFox; 5L8&/EN9- ^:`oP"%-T ~12_D'8D[ public class Utility { "`pNH' N_ UQ tAF]2VV(e public Utility() \tY"BC4. { i+g~ Uj}h pmD4j8F_ =I2@/, } 4SgF,ac3r ?w-1:NWjt //线程睡眠 S}[l*7 public static void sleep(int nSecond) 2
P=[ { &VDl/qnaL try{ 2d*_Qq1 Thread.sleep(nSecond); Fh K&@@_ } z
v>Oh# catch(Exception e) -"=)z/S { ~W<CE_/]k e.printStackTrace (); +b^]Pz5 } NUCiY\td } )l&D]3$6K #%:c0= //日志 2-~|Z=eGW public static void log(String sMsg) F/>*Ifs { nZfs=@w:y System.err.println(sMsg); U@'F%nHw } owvS/"@ fAGctRGH yub{8 f;v public static void log(int sMsg) v5_7r%Hiw { "+)K |9T# System.err.println(sMsg); OOnX` } g+xw$A ou } 3X;{vO\a1 8'A72*dhX >H>gH2qp /* q/NY72tj0 **TestMethod.java #EDEYEW7 */ ~:4~2d| package NetFox; =. *98 `1Zhq+s OR:[J5M) public class TestMethod { qz!Ph5( ]dSK
wxk Bq@zaMv public TestMethod() iib { ///xx/weblogic60b2_win.exe 5u r)uz]w8 try{ UZGDdP SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); }g|nz8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $IVwA SiteFileFetch fileFetch = new SiteFileFetch(bean); "X04mQn15 fileFetch.start(); |t))u`~ } *RWm47 catch(Exception e){e.printStackTrace ();} /)EY2Y' EF#QH
_X 87V1#U ^ } UL(
lf}M j?6X1cM q 2C$R4:Ssw) public static void main(String[] args) Kc #|Z { ecj7BT[mLI new TestMethod(); Dzl;-]S } o%`Xa#*Ly } im]g(#GnKh 点击下载更多相关资料
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