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/* ``o:N` **SiteFileFetch.java yi3@-
*/ 6KmF 9 package NetFox; K ;2tY+I import java.io.*; |5SYKA7CS import java.net.*; RaFk/mSw 5B{O!SNd G0Wzx)3] public class SiteFileFetch extends Thread { _p vL b _s./^B_w! $smzP.V SiteInfoBean siteInfoBean = null; //文件信息Bean &$fe%1# long[] nStartPos; //开始位置 F"9f6<ge long[] nEndPos; //结束位置 )J+vmY~& FileSplitterFetch[] fileSplitterFetch; //子线程对象 SGMLs'D long nFileLength; //文件长度 5gWn{[[e)y boolean bFirst = true; //是否第一次取文件 =:(8F*Q boolean bStop = false; //停止标志 4NxtU/5-sU File tmpFile; //文件下载的临时信息 @p jah(i` DataOutputStream output; //输出到文件的输出流 5H#3PZaQ ~SkdP7 ) //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y418k public SiteFileFetch(SiteInfoBean bean) throws IOException eRllF `* { ,R$n I*mf_ siteInfoBean = bean; F|X-|Co //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
>lqWni tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v/f&rK* > if(tmpFile.exists ()) d[z+/L { z#b31;A@$ bFirst = false; _Tyj4t0ElV read_nPos(); 6C>x,kU } 6o&{~SV3 else a3]'%kKp { 9PEjV$0E2 nStartPos = new long[bean.getNSplitter()]; krm&.J nEndPos = new long[bean.getNSplitter()]; Ow=` tv$l } )K\w0sjR [Dp 6q~RM eHG**@"X a
1bu } -nG3(n&wB O&]Y.Z9,A +ib72j%A public void run() R,01.N( U { z%t>z9hU //获得文件长度 +u*WUw!% //分割文件 bU1UNm`{C //实例FileSplitterFetch kEWC //启动FileSplitterFetch线程 xmZ]mu,,$ //等待子线程返回 e-f_#!bW try{ Gk2\B]{ if(bFirst) $@q)IK%FDL { +\9Y;Ny nFileLength = getFileSize(); RLr;]j8cm if(nFileLength == -1) :h1itn { E,5jY System.err.println("File Length is not known!"); Y+ P\5G } r: n^U# else if(nFileLength == -2) >:5/V0;, { !<}<HR^) System.err.println("File is not access!"); S|Wv1H> } j2" jCv else %VsuGA { <pRb#G" for(int i=0;i<nStartPos.length;i++) >1xlP/4jx { he&*N*of: nStartPos = (long)(i*(nFileLength/nStartPos.length)); M~;Ww-./ } LOi5 ^Um| for(int i=0;i<nEndPos.length-1;i++) pm O }m> { +](^gaDw<L nEndPos = nStartPos[i+1]; IZeWswz } oT$w14b nEndPos[nEndPos.length-1] = nFileLength; N5[QQtQ } g+p?J.+ } 1p>5ZkHb Z<z(;)?c UceZWtYa //启动子线程 XX~~SvSM fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Lm"l*j4 for(int i=0;i<nStartPos.length;i++) |eWlB\ x8 { e.n&Os<|< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]~CGzV
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), @v_ ) ( nStartPos,nEndPos,i); draY/ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?AX./LI fileSplitterFetch.start(); u\-xlp?"o } $Ne$s // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8 vK
Z; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); gO4`e(W // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Z1u{.^~ ^z nEndPos = " + nFileLength); 8$-(% // fileSplitterFetch[nPos.length-1].start(); 828E^Q"< 8.Wf^j$+{ YmFJlMK //等待子线程结束 c&IIqT@Gb0 //int count = 0; >V@-tT"^: //是否结束while循环 _kl.zw% boolean breakWhile = false; [Hy0j* u!?.vx<qy xl@l< while(!bStop) ,*8}TIS(s { yb56nd write_nPos(); M?x/C2| Utility.sleep(500); |2AK~t|t breakWhile = true; jTaEaX8+ i}N'WV`! ` *x;&.&v for(int i=0;i<nStartPos.length;i++) I/rq@27o { !.H< dQS if(!fileSplitterFetch.bDownOver) $0V<wsVM { O8TAc]B breakWhile = false; =K~<& l8 break; BZ<Q.:) } Y~hBVz2g } X0+$pJ60 if(breakWhile) w0x,~ break; /`>BPQH`} <H`&Zqqk J7/"8S_#N //count++; 1om :SHw //if(count>4) +'Pf|S // siteStop(); p]:5S_$ } ihBlP\C i&$L$zf, W'eF
| hu System.err.println("文件下载结束!"); %fnL } 6%~ Z^>`N catch(Exception e){e.printStackTrace ();} q3TAWNzI0 } 3qE2mYK M%5qx,JQY nAG2!2_8 //获得文件长度 u;H SX public long getFileSize() Eb{Zm<TP { Tn<
<i int nFileLength = -1; %WiDz0o try{ 5Jh=${ URL url = new URL(siteInfoBean.getSSiteURL()); ='a[(C&Y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @v\Osp t= httpConnection.setRequestProperty("User-Agent","NetFox"); `WGT`A" thIuK V{CO pca `nN! int responseCode=httpConnection.getResponseCode(); <43O,Kx'Su if(responseCode>=400) "VR>nyG% { .z4
fJx processErrorCode(responseCode); =<MSM\Rb return -2; //-2 represent access is error r ) ;U zd } <R582$( I {Y6U%HG{{r WM$}1:O String sHeader; c+,F)i^` ozwPtF5 nh"nSBRxk for(int i=1;;i++) UUJbF$@; { Q^>"AhOiU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); / CEn yE/ //Utility.log(in.readLine()); X*hY?'Rp sHeader=httpConnection.getHeaderFieldKey(i); YAQ]2<H if(sHeader!=null) yaza { A-x; ai] if(sHeader.equals("Content-Length")) $OB 2ZS" { / E}L%OvE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +XCLdf}dC break; d*$$E } jcD_<WSe } #N9^C@ else k#X~+}N^ break; f]Z%,'1^ } n4\UoKq } L"{qF<@V7& catch(IOException e){e.printStackTrace ();} 4v9jGwnz t catch(Exception e){e.printStackTrace ();} kk#%x#L[ Cl#PYB{1Y X)^eaw]Q0 Utility.log(nFileLength); 9"hH2jc
"TEF >>/|Q: return nFileLength; Yci>'$tQ } 'Dw+k;RH F|pM$Kd` 2*;qr|h, //保存下载信息(文件指针位置) Yw @)0%G private void write_nPos() qg1s]c~0u { 9'+Eu)l: try{ "g27|e?y output = new DataOutputStream(new FileOutputStream(tmpFile)); zGgPW output.writeInt(nStartPos.length); z,dh?%H>X for(int i=0;i<nStartPos.length;i++) hS&3D6Gt { !*Ex}K99 // output.writeLong(nPos); E| eEAa
output.writeLong(fileSplitterFetch.nStartPos); ZD!?mR+- output.writeLong(fileSplitterFetch.nEndPos); %PA#x36 } mbT4K8<^ output.close(); XzLB#0 } &?X0;,5) catch(IOException e){e.printStackTrace ();} X<G"GaL catch(Exception e){e.printStackTrace ();} `|kW%L4 } ?-M?{De )1?#q[x ls[0X82F //读取保存的下载信息(文件指针位置) 3
UUOB. private void read_nPos() (Yi1U~{: { En!X}Owh try{ }@6Tcn1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D!7-(3R int nCount = input.readInt(); 6[+@#IWx nStartPos = new long[nCount]; @7S*
] nEndPos = new long[nCount]; qFQO1"mu for(int i=0;i<nStartPos.length;i++) bmCp:6 { m8[XA!, nStartPos = input.readLong(); xf2|9Tqt nEndPos = input.readLong(); FgwIOpqE* } yuP1*QJ% input.close(); 1N\/61+aA } l9{}nz catch(IOException e){e.printStackTrace ();} P=3mLz- catch(Exception e){e.printStackTrace ();} T.d1? } $?P 5A E ZZ'5BfI"I% lo!^h]iE ! private void processErrorCode(int nErrorCode) +G:CR,Z>+ { 6_mkt|E= System.err.println("Error Code : " + nErrorCode); (8"advc6 } _(7f0p jxc^OsYj _:+hB9n s //停止文件下载 p~Wy`g- public void siteStop()
'ug:ic { W kP`qD3 bStop = true; L2\<iJA}c for(int i=0;i<nStartPos.length;i++) +H{TV#+r fileSplitterFetch.splitterStop(); q4MR9ig1E_ {,NF'x4$ [?>\] } &&PXWR!%] } lcVZ 32MQ //负责部分文件的抓取 uH{oJSrK **FileSplitterFetch.java %eOO8^N */ n2A
;
`= package NetFox; k\76`!B }G/!9Zq UaCfXTG import java.io.*; <aQ<Wy=\ import java.net.*;
B\54e Tn A3mvd-k ?3
S{>+' public class FileSplitterFetch extends Thread { )4#YS$B$@) )JrG`CvdU q-hR EO String sURL; //File URL \s?8}k long nStartPos; //File Snippet Start Position U9"(jl/o long nEndPos; //File Snippet End Position 9Bao~(j/k int nThreadID; //Thread's ID WQ+ xS!ba boolean bDownOver = false; //Downing is over
CK+t6Gp boolean bStop = false; //Stop identical xlcL;e&^P FileAccessI fileAccessI = null; //File Access interface x^zw1e,y ;\g0*b( "5HSCl$r% public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException oRZ98?Y\B
{ "wy2u~ this.sURL = sURL; j:2TicHDC this.nStartPos = nStart; s_;o1 K0 this.nEndPos = nEnd; j- cp nThreadID = id; 5,R4:y ?cK fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?}e^-//*i } Kn=0AdM w,i?e\5 =&i#NSK public void run() i!{A7mo { s(T0lul while(nStartPos < nEndPos && !bStop) !,|-{": { eo*l^7 72CHyl`|l mBeP"G S try{ P$x9Z3d_ URL url = new URL(sURL); Jmuyd\?,b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h% eGtd$n httpConnection.setRequestProperty("User-Agent","NetFox"); I&U.5wf String sProperty = "bytes="+nStartPos+"-"; @<.ei)cqb httpConnection.setRequestProperty("RANGE",sProperty); L}
"bp Utility.log(sProperty); u69UUkG {/j gB"9 R<B5<!+ InputStream input = httpConnection.getInputStream(); esiU._:u //logResponseHead(httpConnection); D 0Mxl?S? &,P; 7 R ]Twyj byte[] b = new byte[1024]; k Nvb>v int nRead; bcq&yL'D while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 7YxVtN { 8_VGB0~3i nStartPos += fileAccessI.write(b,0,nRead); '&+]85_&$ //if(nThreadID == 1) x2sKj"2?@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5T%2al,F` } !w}b}+]GB ;W T<] f^-ot@w Utility.log("Thread " + nThreadID + " is over!"); ;F|#m,2Q- bDownOver = true; riL|B3 //nPos = fileAccessI.write (b,0,nRead); KL6B!B{; } 2!6E~<~HC catch(Exception e){e.printStackTrace ();} d>?C?F } HSWki';G } Er;q s *f NLr a"Z ^Ze(WE) //打印回应的头信息 &~Y%0&F,& public void logResponseHead(HttpURLConnection con) qm"SN<2S* { ;mYZ@g%e for(int i=1;;i++) \%&A? D { 0
*;i]owV String header=con.getHeaderFieldKey(i); {cUGksz]} if(header!=null) oI!"F=?&6 //responseHeaders.put(header,httpConnection.getHeaderField(header)); *u-$$@|y Utility.log(header+" : "+con.getHeaderField(header)); h\p!J-V else E~#G_opQA break; dl"=ZI
'^ } 0hhxTOp
} Rc:}%a%e >|z:CX$] Do7 7V5 public void splitterStop() :tbgX;tCs5 { 5S8>y7knQ bStop = true; H~TuQ } L2p?]:- 064k;|>D oNIYO*[ } < =~=IZ) 2WDe34 zrqI^i"c /* S]ayH$w\Q **FileAccess.java G pI4QzR *//文件访问(定位,写) cxQAp package NetFox; B~^*@5#0| import java.io.*; /{: XYeX L}CU" "-djA, ` public class FileAccessI implements Serializable{ Pro?xY$E) <5D4h! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5'NNwc\ RandomAccessFile oSavedFile; 1)^\R(l long nPos; }LCm_av <T?-A}0uO 8^^ 1h public FileAccessI() throws IOException !(7m/R { P
JATRJ1. this("",0); _7\`xU } Y<|JhqOXK cE:s\hG p3Qls* public FileAccessI(String sName,long nPos) throws IOException z bYv}q { Yb^e7Eug oSavedFile = new RandomAccessFile(sName,"rw"); `kuu}YUi this.nPos = nPos; p:TE## oSavedFile.seek(nPos); }ymW};W } ^utOVi =3c?W&: S9Oz5_x public synchronized int write(byte[] b,int nStart,int nLen) Dm{Xd+Y { o5p{ O>D[z int n = -1; G"`
}"T0} try{ -Uy)=]Zae oSavedFile.write(b,nStart,nLen); R;!@
xy n = nLen; \HbZ~I- } U+qyS|i catch(IOException e) "d:rPJT)(@ { W03mdRW e.printStackTrace (); 1$eoW/8. } F$DA/ {.D 4VZI]3K, ,+
G return n; Nd]F 33|X } g3c<c S^l
t1YB @]%eL } triU^uvh <zR{'7L/ OA*O = /* cFw-JM< **SiteInfoBean.java SFRP
?s */ ,\J 8(,%L package NetFox; <wk !DzeJWM| #<< el;n public class SiteInfoBean { L&DjNu`!9 Sc]K-]1(H iq*im$9J private String sSiteURL; //Site's URL F$)l8} private String sFilePath; //Saved File's Path 2PYn zAsl private String sFileName; //Saved File's Name ;O%
H]oN private int nSplitter; //Count of Splited Downloading File 5PO_qr=Hx JyZuj>`
6 o *J*}y public SiteInfoBean() #Z1-+X8P {//nSplitter的缺省值为5 mA{?E9W //default value of nSplitter is 5 udqrHR5 this("","","",5); TG}owG]] } ":$4/b6 s-#EV c 9f"5~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) r@3-vLI!u { U}5fjY sSiteURL= sURL; =}#yi<Lt sFilePath = sPath; 6&os`! sFileName = sName; {lWV H this.nSplitter = nSpiltter; m;~} }~&vQ a5pl/d vSR&>Q%X } ;:D-}t; ;.uYWP|9 #+1|O;PB# public String getSSiteURL() -n.m "O3 { yuZLsH return sSiteURL; u -t=M] } -}%J3j|R: J)YlG* FL'}~il public void setSSiteURL(String value) 9$\s
v5 { g8N"-j&@ sSiteURL = value; ksC_F8Q+ } aO(PVS|P D+3?p xT"V9t[f public String getSFilePath() QCW4gIp { 9>&zOITTaL return sFilePath; bI &<L O } @4*:qj? 0~fjY^( /eQAGFG public void setSFilePath(String value) #"4ioTL2 { -5b|nQuY sFilePath = value; =@Oo3*> } \:4*h _li3cXE 'hjEd. public String getSFileName() h.X4x2(. { Jj\4P1|' 7 return sFileName; 9(^UchZZi } 8X7??f1;Y -x+3nb|. G$>?UQ[ public void setSFileName(String value) ekhv.;N~ { 3:x(2 A sFileName = value; A0Mjk } X(ph$,[ tLy:F*1i ^xa, r#N:V public int getNSplitter() @q'kKVJs { /xk7Z
q return nSplitter; pJ]
Ix *M } 0(7 IsG=t >}V?GK36 tVRN3fJH public void setNSplitter(int nCount) `3F#k[IR { /Sj~lHh nSplitter = nCount; +]%S}<R } zL
yI|%KH } )$n%4 : /A7( `l;6 r!Aj5 /* ~</FF'Xz **Utility.java !1)aie+p6 */ zl1*GVg package NetFox; Xfc$M(a
K{ (L/>LZn| &'z_:W m public class Utility { UTkPA2x Q~U\f$N j?2~6W/[ public Utility() ({!!b"B2 { ""-wM~^D }YDi/b7 5tlRrf } 1tNL)x"w %Ln`c.C //线程睡眠 }Ja-0v)Wf public static void sleep(int nSecond) 4`,(*igEv { Rml'{S try{ (A~7>\r + Thread.sleep(nSecond); 0#]fEi } Bg~]u+c* catch(Exception e) z+"$G { dVb6u e.printStackTrace (); OMLU ;,4 } ^>IP"k F } {fXkbMO| Nj>6TD81u //日志 (TT=i public static void log(String sMsg) 6|jZv~rS$ { aRMlE*yW System.err.println(sMsg); ~ n]5iGz } _@ao$)q{J *?X&Y8Kf u<S`"MR:J public static void log(int sMsg) #%E`~&[ { *E/Bfp1LIe System.err.println(sMsg); [9">}l } #kC~qux^ } yvB]rz} i _N`.1Dl%Q 4zMvHe /* [bh?p+V **TestMethod.java c[Fc3 */ _KH91$iW8m package NetFox; ,R{&x7 Sb`[+i'` X"{%,]sb G public class TestMethod { ;"MChk +dCDk* /m 0/Q_%
: public TestMethod() \jC) ;mk { ///xx/weblogic60b2_win.exe 9lYKG^#D try{ {W,5]- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); xk,Uf,,> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); At.&$ t SiteFileFetch fileFetch = new SiteFileFetch(bean); v?`R8 fileFetch.start(); T~]~'+<Pi } {xTq5`&gT catch(Exception e){e.printStackTrace ();} l?m"o-Gp3 o[!'JUxZ geG0F}oC! } wsQnjT> qf0pi&q Nh!`"B2B public static void main(String[] args) X?_rD'3 { Vh\_Ko\V5 new TestMethod(); }QI \K } R{@saa5I(> } UdO8KD#r3 点击下载更多相关资料
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