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/* y|BRAk&n **SiteFileFetch.java ;^9A o>(?y */ 9!u=q5+E package NetFox; |a(%a43fC import java.io.*; om`x"x&6 import java.net.*; Ag3[Nu1 JMMT886 U4J9bp| public class SiteFileFetch extends Thread { |mSF a8G@ -'j_JJ q K sI}X~ SiteInfoBean siteInfoBean = null; //文件信息Bean 7IrbwAGZ3 long[] nStartPos; //开始位置 y#4f^J!V long[] nEndPos; //结束位置 a@ E+/9 FileSplitterFetch[] fileSplitterFetch; //子线程对象 qno8qF* long nFileLength; //文件长度 1}moT# boolean bFirst = true; //是否第一次取文件 3fS+,>s\O boolean bStop = false; //停止标志 xQ[~ c1 File tmpFile; //文件下载的临时信息 ZfPWH'P DataOutputStream output; //输出到文件的输出流 .Ulrv5wJ 1@&i
ju5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?onaJ=mT public SiteFileFetch(SiteInfoBean bean) throws IOException 8X6F6RK6,1 { CCCd=s. siteInfoBean = bean; p)5j~Nl //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <5R`E( tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); u!=9.3 if(tmpFile.exists ())
O
"jX|5 { U*G8}W bFirst = false; BO#XQ, read_nPos(); ~i)m(65: } {*gO1TZt9 else Lci SQ
R! { 3ErW3Ac Ou nStartPos = new long[bean.getNSplitter()]; I<v1S nEndPos = new long[bean.getNSplitter()]; mE`OG8 } ?#OGH`ZvkI pvCf4pf~ T6gugDQ~. }:5_vH0 } zYCrfr :[;]6;
1o&]=( public void run() IFrq\H0 { %\5wHT+) //获得文件长度 3#{{+5G //分割文件 83 O+`f //实例FileSplitterFetch c-|~ABtEpX //启动FileSplitterFetch线程 _0~WT //等待子线程返回 _|VWf 8?\ try{ f}jo18z% if(bFirst) 85>WK+= { 6`/nA4S4. nFileLength = getFileSize(); ikr|P&e#u if(nFileLength == -1) vx:MLmZ. { L*;XjacI] System.err.println("File Length is not known!"); q|*}>=NX } Gi7jgv{{ else if(nFileLength == -2) XS$5TNI { D}n&`^1X+ System.err.println("File is not access!"); tVSURYA8 } wYZ"fusT else >d.o1< { cY%[UK $l for(int i=0;i<nStartPos.length;i++) aBo8?VV]8 { Oeua<,]Z~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ix+===6 } Y^zL}@ for(int i=0;i<nEndPos.length-1;i++) G k'j<a
{ <SiD m-=E nEndPos = nStartPos[i+1]; 7@[3]c<= } bjgf8427I nEndPos[nEndPos.length-1] = nFileLength; 4nC`DJ;V } KfC8~{O- } xM ]IU
< 4vri=P 2% .C]V==z`[4 //启动子线程 ^P5+ _P fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; jy=dB-& for(int i=0;i<nStartPos.length;i++) ]1A"l!yf { 'b#`)w@/= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
6`sOhVD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), K<@gU\-! nStartPos,nEndPos,i); #St=% ! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;aZ$qgN*Y fileSplitterFetch.start(); ,@+7(W } MQL1 />j; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,2Y PD4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fz%I'+! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E)eRi"a46 nEndPos = " + nFileLength); '4gi*8Y // fileSplitterFetch[nPos.length-1].start(); rlj @' ;]ojfR=?% "=cWcztiP //等待子线程结束 SU0K#: //int count = 0; LnQm2uF //是否结束while循环 "CYh"4]@rD boolean breakWhile = false; l djypEa} T [mo
PD5 !PN;XZ~{ while(!bStop) nC^|83 { V^O
dTM write_nPos(); owClnp9K Utility.sleep(500); _dCsYI% breakWhile = true; (kpn"]^' zYf`o0U y`"b%P)+T for(int i=0;i<nStartPos.length;i++) m'Jk!eo { C$X
)I~M if(!fileSplitterFetch.bDownOver) +\SNaq~& { OiB*,TWV breakWhile = false; %9z N U break; |meo } &3x
\wH/_ } E?c)WA2iH if(breakWhile) wGd4:W break; V K/;ohTTP W~15[r0 D- )jmz>R //count++; Lod$&k@@ //if(count>4) TH_Vw,) // siteStop(); 9N(<OY+Dgm } Dq/ _#&S %B^nQbNDM <V P@# System.err.println("文件下载结束!"); I!(.tu6u6c } #q{i<E 07 catch(Exception e){e.printStackTrace ();} Dp:u!tdbeg } P0m;AqS#R ]h0Fv-[A b6Jv|1w' //获得文件长度 z/bJDSQ public long getFileSize() #(o 'G4T { !!Tk'=t9"3 int nFileLength = -1; 0 S3~IeJ try{ Ndj9B|s_ URL url = new URL(siteInfoBean.getSSiteURL()); 7g(,$5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;6N@raP7 httpConnection.setRequestProperty("User-Agent","NetFox"); ?!H<V@a \tc`Aj%K &FrW(>2 int responseCode=httpConnection.getResponseCode(); ;IhkGPpWP if(responseCode>=400) Fs q=u-= : { *G"vV>OSV processErrorCode(responseCode); tAD{{GW9 return -2; //-2 represent access is error hJ8|KPgdw } Vq`i.>%5 "65@8xt== MpbH!2J String sHeader; .pNPC|XU `Q2
`": 6l|pTyb1 for(int i=1;;i++) S[fzy$"> { ]A}'jP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vt`hY4 //Utility.log(in.readLine()); -#]?3*NO sHeader=httpConnection.getHeaderFieldKey(i); jEBZ"Jvb if(sHeader!=null) o[AQS` { 1gp3A if(sHeader.equals("Content-Length")) C3fSSa%b { ${n=1-SMU nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); xZ2}1D break; [3`T/Wm } {Y{*(5YV } Ya] qo] else b&u o^G, break; <Sn5ME<* } azMrY< } } G$rr.G catch(IOException e){e.printStackTrace ();} zGFo-C catch(Exception e){e.printStackTrace ();} }a@ZFk_> [ V`j@dV 9OB[ig Utility.log(nFileLength); 2#Fc4RR;
Ij>x3L\- >j1\]uo return nFileLength; jRXpEiM } y4`<$gL
>So)KB Ww*='lz //保存下载信息(文件指针位置) j3QpY9A private void write_nPos() ocwRU0+j { R4,j try{ h'wOslyFa output = new DataOutputStream(new FileOutputStream(tmpFile)); YIA}F1: output.writeInt(nStartPos.length); wC@5[e$ for(int i=0;i<nStartPos.length;i++) 2Mx9Kd'a
r { +r)'?zU // output.writeLong(nPos); W(9fCDO; output.writeLong(fileSplitterFetch.nStartPos); ToIvyeFr output.writeLong(fileSplitterFetch.nEndPos); a
pqzf } $3](6 output.close(); ?4=8z8((! } D%cWw0Oq catch(IOException e){e.printStackTrace ();} ouKID_' catch(Exception e){e.printStackTrace ();} HxJKS*H; } +~J?/ d,au&WZ;_ c_xtwdkL9 //读取保存的下载信息(文件指针位置) =?UCtYN,P private void read_nPos() FKflN { yn<z!z%mz try{ H<|I&nV DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); eW)(u$C|qL int nCount = input.readInt(); iZ+\vO?| nStartPos = new long[nCount]; "|pNS) nEndPos = new long[nCount]; UM%[UyYQ for(int i=0;i<nStartPos.length;i++) cOra`7L` { a#W:SgE?Y nStartPos = input.readLong(); wL,b.] nEndPos = input.readLong(); }*l V } ~I6Er6$C^ input.close(); ,YFuMek } NUBzm nA>8 catch(IOException e){e.printStackTrace ();} 0`/ PEK{ catch(Exception e){e.printStackTrace ();} vrXmzq } D1bS=>
;," #V[?puE@ U:>'^tkp private void processErrorCode(int nErrorCode) b3e:F{n
^ { pmXx2T#= System.err.println("Error Code : " + nErrorCode); wzB*M}3 } S4kGy}{+i RsU=fe, $DW3H1iW //停止文件下载 fXMVl\ < public void siteStop() QOIi/flK { 9@C3jZ+9`H bStop = true; o9M[Zr1@k for(int i=0;i<nStartPos.length;i++) ''!pvxA fileSplitterFetch.splitterStop(); VP=(",` 4 8M)A xI'<4lo7Z } \/4ipU. } w\=zTHo88 //负责部分文件的抓取 ;nG"y:qq **FileSplitterFetch.java ]@1YgV */ XhFa9RC package NetFox; ke|v|@ 94%gg0azp j~V@0z. import java.io.*; w.J[3m/ import java.net.*; e;pVoRI hu\HK81m bJe*J\){ public class FileSplitterFetch extends Thread { ~c[}%Ir> _Jj/"? qie7iE`o String sURL; //File URL YE&"IH]lF long nStartPos; //File Snippet Start Position 8 f%@:}H long nEndPos; //File Snippet End Position ` 1DJwe2 int nThreadID; //Thread's ID 2;%DE<Z boolean bDownOver = false; //Downing is over )F&@ M;2p' boolean bStop = false; //Stop identical =If % m9 FileAccessI fileAccessI = null; //File Access interface C1P{4 U {rGq|Bj Vn? %w~0! public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException I"@X~Y7} {
y|q4d(P. this.sURL = sURL; d9|dHJf this.nStartPos = nStart; #/@U|g this.nEndPos = nEnd; gBHev1^y nThreadID = id; xBU\$ToC fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;OmmXygl } X`]-)(UX :w(J=0Lt mp0p#8txi public void run() +]
B { sW+YfJT while(nStartPos < nEndPos && !bStop) %Rr!I:[ $ { ? AP2Opsl TW).j6@f %@ $h?HP try{ q#v.-013r URL url = new URL(sURL); QRdNi1&M HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $ZYEH httpConnection.setRequestProperty("User-Agent","NetFox"); %0INtq String sProperty = "bytes="+nStartPos+"-"; o^4qY httpConnection.setRequestProperty("RANGE",sProperty); <1&kCfE& Utility.log(sProperty); ~X5yHf3 +,7dj:0S c a_N76o! InputStream input = httpConnection.getInputStream(); [e3|yE6 //logResponseHead(httpConnection); -'JTVfm. ;|w &n z=!$3E ecr byte[] b = new byte[1024]; [6 wI22 int nRead; [V{JuG;s while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) KoiU\r { 64s+
0} nStartPos += fileAccessI.write(b,0,nRead); B P"PUl: //if(nThreadID == 1) %H>vMR-,~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |`s}PcV } 66D<Up'K wc)[r~On(5 *x`z5_yfO Utility.log("Thread " + nThreadID + " is over!"); FFbMG:>: bDownOver = true; 4DEsB)%X //nPos = fileAccessI.write (b,0,nRead); cGkl=-oQ' } R%aH{UhE` catch(Exception e){e.printStackTrace ();} b@^M|h.Va } L;nRI. } 52m^jT Sx ?Li^XONz a%tm[Re //打印回应的头信息 `NXyzT`:K public void logResponseHead(HttpURLConnection con) dpZ7eJ { sxgR;gf6 for(int i=1;;i++) _XXK1H x { 7EY~5U/4 String header=con.getHeaderFieldKey(i); \bQ|O7s if(header!=null) IG`~^-}7lR //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2P$l XGjh Utility.log(header+" : "+con.getHeaderField(header)); jCW>=1:JGY else (&PamsV*8 break; 'nP'MA9b;a } ^K@r!)We } 6\ux;lksn* vc6UA%/f tt[P{mMQ public void splitterStop() 98Srn63O { ="@W)"r bStop = true; HCHP15otfe } Qu!\Cx@ <tf4j3lwH R|V<2 } G&D N'bp E=~H,~ dtA- 4Ndm /* ^Q!:0D* **FileAccess.java +n,8o:fU: *//文件访问(定位,写) ~Zl`Ap package NetFox; ;zs*Zd7h M import java.io.*; )@eBe^ |r}%AN6+ +D?d)lK public class FileAccessI implements Serializable{ UgJlXB|a%2 ~(aq3ngo. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Zt lS*id_ RandomAccessFile oSavedFile; ]|u}P2 long nPos; "oz@w'rG 7;CeQx/W)W [2i+f< public FileAccessI() throws IOException `Z|sp { =#BeAsFfO this("",0); rO]C`bg } 1Dt"Rcn"4 yp@mxI@1 $k'f)E public FileAccessI(String sName,long nPos) throws IOException 3Xd+>'H { NnHwk)' oSavedFile = new RandomAccessFile(sName,"rw"); V]q{N-Iq this.nPos = nPos; d.2b7q09 oSavedFile.seek(nPos); )V@qH] } }S#.Pw% `}zv17wp Jk{>*jYk` public synchronized int write(byte[] b,int nStart,int nLen) w-B\AK?} { Lj~lfO int n = -1; .&sguAyG try{ E*(Q'p9C oSavedFile.write(b,nStart,nLen); Efp=z=E n = nLen; @lTUag'U0 } UBqK$2
# catch(IOException e) GC4$9q}C4Z { JYSw!!eC e.printStackTrace (); FblGFm"P } :[ITjkhde0 n|,Es!8:o XX6&%7( return n; #m$H'O[WG\ } xje{kx# yLDHJ}R ,7j`5iq[m } ;euWpE;E\# a@8knJ| ..~{cU4Tt /* z?
{#/ **SiteInfoBean.java qWanr7n]@ */ ?5(L.XFm package NetFox; Fn[~5/ qb" ! QlXy9-oJ" public class SiteInfoBean { Rp@u.C< htF&VeIte (vI7qD_ private String sSiteURL; //Site's URL Ce0I8B2y private String sFilePath; //Saved File's Path wz,
\zh private String sFileName; //Saved File's Name wR;l"*j private int nSplitter; //Count of Splited Downloading File N$y4>g >#q|Pjv] ~(Tz < public SiteInfoBean() M}nalr+# {//nSplitter的缺省值为5 BMdr.0 //default value of nSplitter is 5 NGze: gPmO this("","","",5); +$UfP(XmH } JHQ8o5bEQp @?1%*/ [=9R5.)c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .Z^g
7 *s { B}M J?uvA sSiteURL= sURL; sRMzU sFilePath = sPath; |SxEJ sFileName = sName; w(G(Q>GI this.nSplitter = nSpiltter; ALwuw^+ 9V"j=1B} K&X'^|en } )T4L^^` `773& \PK Qb|dp~K.M public String getSSiteURL() G{"1I { 0)/214^& return sSiteURL; )8<X6 } c8'8DM I#Bz
UF Ym6ec|9; public void setSSiteURL(String value) (8*lLZ { `j(+Y sSiteURL = value; T2-> } $?s^HKF~ s{IoL_PJP _4W#6! public String getSFilePath() srSTQ\l4 { T9$U./69-L return sFilePath; kDz.{Ih } UP`q6]P "/"qg
$e_ps~{7$ public void setSFilePath(String value) E??%)q { C=]3NB>Jc sFilePath = value; OP&[5X+Y } D!P?sq _5r XMdc n, wiGwN public String getSFileName() ]lo1Kw { |H A7 C return sFileName; KF'M4P } Qnw$=L: J)G3Kq5>:b y8 N b8m public void setSFileName(String value) HUghl2L.< { l<HRD sFileName = value; C:K\-P9 } N:<O Y]lqtre*Y $"i690 public int getNSplitter() vqs~a7E-P { ,,J3 h return nSplitter; C1/jA>XW } ;FmSL#]I wY95|QS d"78:+ public void setNSplitter(int nCount) y(dS1.5F { +doT^&2u* nSplitter = nCount; br;G5^j3? } ]M2<I#hF. } ]/bE${W*] i#lo?\PO> ypd?mw&1} /* ]R@G5d **Utility.java 2tv40(M:< */ `#f=&S?k package NetFox; caP -1:Z^&e/ .#@D n( public class Utility { m\f_u* (2li:1j nADd,|xD3 public Utility() /ZDc=>)~ { 5\S7Va;W
SoX V mig3.is } X W)A~wPBs Ic}ofBK //线程睡眠 ~Hs{(7 public static void sleep(int nSecond) !_) ^bRd { _p&$X try{ ;N\?]{ L Thread.sleep(nSecond); S:YL<_oI| } j 7URg>i0 catch(Exception e) nrIL_ { !cb#fl e.printStackTrace (); ?nW#qy!R } bY~ v0kg } YZl%JX IFxI>6<& //日志 "^z=r]<5
public static void log(String sMsg) 8Y{s;U0n { |b.z*G System.err.println(sMsg); u, kU$ } wk$,k (! KG)! ;ojiJ?jU public static void log(int sMsg) sYn[uPefj { Vxdp| System.err.println(sMsg); lU.Kc } rAukHeH } j]5WK_~M SvuTc!$? 63&^BW /* H lB]38 **TestMethod.java MXZ>"G */ uA~slS
Z package NetFox; B3
zk(RNZ :1aL
? @WOM#Kc public class TestMethod { vq'k|_Qi= ?Rr2/W#F Fx#jV\''s public TestMethod() p*qPcuAA { ///xx/weblogic60b2_win.exe SW 8x]B try{ P3o@g kXP SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); {"}V&X160o //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -Zc![cAlO SiteFileFetch fileFetch = new SiteFileFetch(bean); Q!'qC*Gyfn fileFetch.start(); Ew,T 5GG } fZN><3MO> catch(Exception e){e.printStackTrace ();} uzU{z; Z"v<0]rN C/@LZ OEL } I.jZ
wW!r 8l+H"M&| k*Nr!Z!} public static void main(String[] args) raUs%Y3 { jAhP>
t: new TestMethod(); B6M+mx"G } SoQR#(73HK } (K{5fC 点击下载更多相关资料
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