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/* 3/hAxd **SiteFileFetch.java ;R?9|:7 */ r\66]u[ package NetFox; *Cgd?*\7 import java.io.*; $$G^#t1=XZ import java.net.*; "ae55ft// #TSLgV'U I2=Kq{ public class SiteFileFetch extends Thread { jNNl5. NeyGIEP W\<5'9LNb SiteInfoBean siteInfoBean = null; //文件信息Bean YR`Mi.,Sfm long[] nStartPos; //开始位置 $bKa"T* long[] nEndPos; //结束位置 v)2@;Q FileSplitterFetch[] fileSplitterFetch; //子线程对象 bqg\V8h long nFileLength; //文件长度 {#y HL boolean bFirst = true; //是否第一次取文件 ]H|1quT boolean bStop = false; //停止标志 .*g;2.-qv& File tmpFile; //文件下载的临时信息 5+O#5"v_ DataOutputStream output; //输出到文件的输出流 <!|2Ru @*O(dw //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uL4@e public SiteFileFetch(SiteInfoBean bean) throws IOException 4.dMNqU { jWW2&cBm\ siteInfoBean = bean; p8^^Pva/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); KXFa<^\o tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !<2*B^
if(tmpFile.exists ()) ':w6{b { 2h6F j& bFirst = false; hTn
}AsfLY read_nPos();
g `B?bBg } #zt+U^#) else vP'R7r2Yx { 3-8Vw$u nStartPos = new long[bean.getNSplitter()]; {UYqRfgbZ nEndPos = new long[bean.getNSplitter()]; uyG4zV\h* } $P@P}%2 e"|9%AW@< J:mOg95< %/MK$ } wL 5).`oq s}9aZ Aq|LeH public void run() <STjB,_s { CsR~qQ
5 //获得文件长度 uYMW5k_,> //分割文件 {hRAR8 //实例FileSplitterFetch 7F'61}qL //启动FileSplitterFetch线程 1^Zx-p3J //等待子线程返回 <$njU=YE& try{ ^?xXP=/ if(bFirst) ;|/7o@$n { 3G8uXB_`} nFileLength = getFileSize(); ._tv$Gd@k if(nFileLength == -1) dYV)lMJ* { +uwjZN'9a System.err.println("File Length is not known!"); "rjJ"u1 } -RH ?FJ else if(nFileLength == -2) =C\S6bF% { ak;Z; System.err.println("File is not access!"); r$\g6m } ~0 FqY&4 else
6^: l { >uJrq""+ for(int i=0;i<nStartPos.length;i++) c*1x*'j. { ?I/,r2ODLh nStartPos = (long)(i*(nFileLength/nStartPos.length)); c@q>5fR/c } l2`8]Qr for(int i=0;i<nEndPos.length-1;i++) T)Nis~ { >v<}$v6D~ nEndPos = nStartPos[i+1]; ,.}PZL } uV
6f~cQ nEndPos[nEndPos.length-1] = nFileLength; G(0bulq } j ^!J:Bj } kkOYC?zE? Mc6Cte]3| nC&rQQFF //启动子线程 @xkM|N? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _mkI;<d]$T for(int i=0;i<nStartPos.length;i++) 63u'-Z"4 { )sS<%Xf fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @e0Q+ t siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $0W0+A$ nStartPos,nEndPos,i); 'b^:"\t'Rh Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t=e0z^2i+ fileSplitterFetch.start(); 2iG(v._x } D@JHi'F // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -owfuS?i= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #i]@"R // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }>
1h+O nEndPos = " + nFileLength); ~IWi@m{ // fileSplitterFetch[nPos.length-1].start(); 4r zioIk 462ae`
6l *r%mqAx( //等待子线程结束 <s7{6n') //int count = 0; g<dCUIbcQ //是否结束while循环 ~!nd'{{9 boolean breakWhile = false; #U_u~7?H$ pM7BdMp PvB?57wkF while(!bStop) fVN}7PH7+ { i ('EBO
write_nPos(); =4%C?(\ Utility.sleep(500); yED^/=\)} breakWhile = true; AeJM[fCMa f%}+.eD jN<]yhqf for(int i=0;i<nStartPos.length;i++) QNtr = { bn(Scl#@K if(!fileSplitterFetch.bDownOver) 0Its;| { Q:MsD. breakWhile = false; q7PRJX break; Z{CL! } jI V? p } /&|pXBY$; if(breakWhile) Yptsq@s break; LK%B6-;~- =Ffq =< G_<[sMC8 //count++; ~^C7(g ) //if(count>4) g`6wj|@ =W // siteStop(); <Ztda ! } eJA{]^Zf .5ycO *h%G 4M System.err.println("文件下载结束!"); KN`z68c4L } Q+Fw =Xw catch(Exception e){e.printStackTrace ();} ppD~xg] } A X#!9-m3 U`Ag|R A-u5 //获得文件长度 =iQm_g public long getFileSize() 0EB'! { Rp|&1nS int nFileLength = -1; U; xWW9 try{ @iceMD. URL url = new URL(siteInfoBean.getSSiteURL()); 3d<HIG^W} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H44&u](8{ httpConnection.setRequestProperty("User-Agent","NetFox"); |G@)B!> 3,5wWT]
) N9PM.nbd% int responseCode=httpConnection.getResponseCode(); [-gKkOT8E if(responseCode>=400) <khAc1" { UmE{>5Pt processErrorCode(responseCode); \|t0~sRwh return -2; //-2 represent access is error y~=hM
} i+Dgw csM|VNE> S}f<@-16P String sHeader; )89jP088V rQm 8'[wa for(int i=1;;i++) -8jqC6mQ { \@3 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &NQR*Tn //Utility.log(in.readLine()); eM"mP&TTL sHeader=httpConnection.getHeaderFieldKey(i); sN}@b8o@ if(sHeader!=null) t>sX.=\$ { kw~H%-,] if(sHeader.equals("Content-Length")) $Ig,cTR.b { S:uEK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); SkA'+( break; XXcf!~uO } .8!0b iS } FxX3Pq8h else `VE&Obp[ break; P$ef,ZW" } o)=VPUe } EI.Pk>ZIm catch(IOException e){e.printStackTrace ();} =*}Mymhk( catch(Exception e){e.printStackTrace ();} +|<b0Xd aF"Z!HD Hc%\9{zH Utility.log(nFileLength); =M#?* e -b}S3<15@ X4G55]D$> return nFileLength; %Nl(Y@dD* } @e0skc [s{:}ZuKc Ur(o&, //保存下载信息(文件指针位置) .6F3;bg R7 private void write_nPos() I?g__u=n~ { @qy*R'+ try{ b[;3KmUB output = new DataOutputStream(new FileOutputStream(tmpFile)); 'aP*++^ output.writeInt(nStartPos.length); I<K/d for(int i=0;i<nStartPos.length;i++) ==Mi1Q#5C { 5 hadA>d // output.writeLong(nPos); Hk*cO;c output.writeLong(fileSplitterFetch.nStartPos); }n%Rl\p output.writeLong(fileSplitterFetch.nEndPos); m
Ap|?n/K } n{r#K_ output.close(); $
].k6,%{p } G)Bq?=P
catch(IOException e){e.printStackTrace ();} 6CmFmc, catch(Exception e){e.printStackTrace ();} #
pB:LPEsK } =DTOI e=UVsYNx cloSJmUlQ //读取保存的下载信息(文件指针位置) F'$S!K58 private void read_nPos() $jh>zf { )9*3^v try{ gNN"
H#=2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); sg"D;b:X int nCount = input.readInt(); Z"|P(]A nStartPos = new long[nCount]; xM//] nEndPos = new long[nCount]; ]N"F?3J 8 for(int i=0;i<nStartPos.length;i++) X7d.Ie { fP1OH&Ar nStartPos = input.readLong(); sVdK^|j nEndPos = input.readLong(); ('6g)@=\U } &qP-x98E? input.close(); tZ
j,A%<
} :U. )YHY catch(IOException e){e.printStackTrace ();} rL
sK-qQ catch(Exception e){e.printStackTrace ();} u<shhb- } 8{ Eo8L'V n=o'ocdS) tm1UH 4 private void processErrorCode(int nErrorCode) 6Hbf9,vI { `h9)`* System.err.println("Error Code : " + nErrorCode); V<V\0n!0 } .!8X]trEg i;hc]fYb=K niHL/\7u //停止文件下载 <uKm%~xi< public void siteStop() s
P4,S(+e { jc.JX_/ bStop = true; zMYd|2bc for(int i=0;i<nStartPos.length;i++) "I}Z2 fileSplitterFetch.splitterStop(); l5Wa'~0qA ?5v5:U(A {I-a;XBX } k
gu[!hD1 } 7Jx-W| //负责部分文件的抓取 C{hcK 1-K **FileSplitterFetch.java M1^C8cz */ soq".+Q package NetFox; %L13Jsw l \^nC2 <VaMUm<2 import java.io.*; %|(?!w7 import java.net.*; C9F+e N.{jM[\F VHT@s7u0" public class FileSplitterFetch extends Thread { /uE^H%9h [)SR$/A ^[,s_34V String sURL; //File URL ~x4B/zW? long nStartPos; //File Snippet Start Position oCKM5AVWsv long nEndPos; //File Snippet End Position Hg9.<|+yo int nThreadID; //Thread's ID _0W;)v boolean bDownOver = false; //Downing is over i,IM?+4 boolean bStop = false; //Stop identical KHlIK`r FileAccessI fileAccessI = null; //File Access interface 3U~lI& J/x@$' +:,`sdv6o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException rFq@]t3q { N8XC~Dh{ this.sURL = sURL; J,1osG<6x this.nStartPos = nStart; },fo+vRM this.nEndPos = nEnd; u.kYp nThreadID = id; G?ugMl} fileAccessI = new FileAccessI(sName,nStartPos);//定位 JOdwv4(3V } U$A7EFK' Q-`{PJ(p D!RE-w92X public void run() (}C^_q:7d { $,;S\JmWP while(nStartPos < nEndPos && !bStop) kWs+2j { Aa`MK$29F T")i+v pYfV~Q^3 try{ IypWVr URL url = new URL(sURL); Vj=Xcn#*8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3@yTzaq6 httpConnection.setRequestProperty("User-Agent","NetFox"); W ~Jzqp9g String sProperty = "bytes="+nStartPos+"-"; i$bzdc#s httpConnection.setRequestProperty("RANGE",sProperty); XD^dlL Utility.log(sProperty); _;e!ZZLG fQQsb 5=i "X5_-l InputStream input = httpConnection.getInputStream(); 6)wy^a|pb //logResponseHead(httpConnection); i-k >U}[% |}M0,AS If-,c^i byte[] b = new byte[1024]; ~ThVap[* int nRead; p?V?nCv1O while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) oSn! "<x
{ ';b3Mm
# nStartPos += fileAccessI.write(b,0,nRead); (LRM~5KVg //if(nThreadID == 1) |.(CIu~b // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4bi NGl~ } zj>aaY h`5YA89 J%\- 1 Utility.log("Thread " + nThreadID + " is over!"); AfRW=&xdT bDownOver = true; X&(<G //nPos = fileAccessI.write (b,0,nRead); *K(k Kph } +}^|dkc catch(Exception e){e.printStackTrace ();} W|25t)cJ8h } ^sifEgG *d } Qz@IK:B} oTCzY Y `/O`OrZ1K //打印回应的头信息 Tm)GC_ public void logResponseHead(HttpURLConnection con) BTTLy^ { u^Nxvx3l0 for(int i=1;;i++) <vB<` { }bf=Ntk String header=con.getHeaderFieldKey(i); (#!]fF"!x if(header!=null) |5xYT 'V //responseHeaders.put(header,httpConnection.getHeaderField(header)); eOm< !H Utility.log(header+" : "+con.getHeaderField(header)); <nWKR, else 0n:?sFY> break; ?;|@T ty% } b!0DH[XKV } /gz:zThf{ #?{qlgv<p YijMF/Uyb public void splitterStop() S&4+ e:K { /!3ZW XY\ bStop = true; D|d4:;7 } 7\A4vUI3 *Jvxs
R'a1 FR
x6c } E *F*nd]K 9>by~4An? A4G,}r *n /* (CdJ;-@D **FileAccess.java VF)uu[
f9 *//文件访问(定位,写) \q~w<%9Dq package NetFox; -2F@~m| import java.io.*; hv*>%p mxQR4"]jY Q}kfM^i public class FileAccessI implements Serializable{ bfgz1
`u ao#!7F //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 M[, D * RandomAccessFile oSavedFile; 4%
HGMr long nPos; AL$W +') o=pt_!i/ RMoJz6^> public FileAccessI() throws IOException w
|_GV}#_ { 2fJ{LC this("",0); v:KX9A. } *5'.!g(' [oV{83f bpCNho$ public FileAccessI(String sName,long nPos) throws IOException #(C/Cx54 { >':5?\C+- oSavedFile = new RandomAccessFile(sName,"rw"); b1u}fp
GF this.nPos = nPos; !
ja[4. oSavedFile.seek(nPos); LP:nba : } $5,~JYcb !tEe\K\e 9)+@0fG) public synchronized int write(byte[] b,int nStart,int nLen) -G9|n#zCU { G.g|jP'n int n = -1; ?Gd sOg^ try{ _\.{6"" oSavedFile.write(b,nStart,nLen); k#O,j pbB n = nLen; mwh{ "FL( } oid[syPB catch(IOException e) $;2)s}ci { o(*F])d; e.printStackTrace (); bd!U)b(}OV } Cq>6rn < f(?T` z{:-!oF&CB return n; @6 /yu>% } yGTziv! xjo;kx\y^ |uI?ySF } =m7H)z)i*J fW?sYC' ["y6b*;x /* 9#7J:PfZ< **SiteInfoBean.java ,_jC$ */ @x1%)1 package NetFox; !Xj#@e qI%&ay"/ V1B(|P public class SiteInfoBean { hQRL,? vE%s,E, ~6`iY@) private String sSiteURL; //Site's URL *5k+t private String sFilePath; //Saved File's Path w{!(r private String sFileName; //Saved File's Name ExVDkt0 private int nSplitter; //Count of Splited Downloading File tx"LeZZ x)SralWb 3J~0O2 public SiteInfoBean() W@.Ji B {//nSplitter的缺省值为5 j8++R&1f] //default value of nSplitter is 5 f'X9HU{Cz this("","","",5); g #
S0V } ^s&W>hTX: u%3i0BajY 5\bJR0I@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) +m)q% I> { &]F3#^!^ sSiteURL= sURL; @MiH(.Dq sFilePath = sPath; }4&/VvN sFileName = sName; P(,?#+]- this.nSplitter = nSpiltter; qnChM;) `zA#z /> VT\"q1)p } X|}2_B j.m(ltGh #Ex p51 public String getSSiteURL() ;),"M{"v { Es!Q8. return sSiteURL; kGHQ`h } F]EBD 8/b ;AX8aw, j+rG7z){K public void setSSiteURL(String value) wM~H(=s`D { wi_'iv sSiteURL = value; SmhGZ } I9?Ec6a_ \]uV!)V5B V`kMCE;?l public String getSFilePath() NI aFI( { ;=4Xz\2 return sFilePath; *bd[S0l } $,3J7l3 u JY)4T =>iA gp'# public void setSFilePath(String value) TP%+.#Fu { .fAv*pUzU sFilePath = value; M}O}:1Par } wSEWwU[ 0hY{<^"Y v6GPS1:a public String getSFileName() i#/]KsSp { !|
#83 return sFileName; Jrxz'9qRG } &@% $2O.3 Qm4o7x{q A1"SLFY public void setSFileName(String value) x79Ha, { C0jj(ku& sFileName = value; }}|)Yq } ^uBxgWIC ? *>]")[> bq>_qpr public int getNSplitter() ?t](a:IX { gw36Ec<M return nSplitter; >w+HHs/$wK } wE]K~y!` q1?&Ev^ s{0aBeq public void setNSplitter(int nCount) 8NBT|N~N { nUS| sh nSplitter = nCount; !3X0FNGq } D^Jk@<* } [F!Y%Zp
U;N:j8 H@bf'guA|B /* `h:34RC; **Utility.java U*3J+Y */ LbEM^D package NetFox; f| _u7"OX /!h;c$ Rk!X]-`= public class Utility { R;,g1m|] 1#IlWEg 1W7%1FA public Utility() H0m|1
7 { Od f[* 1 zw*/dp wE+${B03 } p
sL?Y <sK4#!K //线程睡眠 OC-gA}FZ-} public static void sleep(int nSecond) [8tL"G6s { _SW3_8SuM. try{ !*RqCS, Thread.sleep(nSecond); dXF^(y]l } ,) J~ ,^f6 catch(Exception e) 93Co}@Y;Y+ { lpz2 m\ e.printStackTrace (); Z#rB} } th;{V%:LW } +$g}4 9eH$XYy //日志 `
,SiA-3* public static void log(String sMsg) v`M3eh@$A { d_IAs System.err.println(sMsg); w.[ "p9tc } oYukLr :j+ ZI3@ :Nz9xD$S5 public static void log(int sMsg) \B,(k< { ZIQ
[bE7 System.err.println(sMsg); D8$G `~hD } =weSyZ1~ } )ubiB^g'm R6]Gk)5 EM[WK+9>I{ /* /pT=0= **TestMethod.java m6w].-D8 */ RS8Hf~0G package NetFox; zzX_q(:S PpAu!2lt9 y !_C/!d public class TestMethod { !6*"( ?.Ca|H< c9&xe"v public TestMethod() Sy0$z39 { ///xx/weblogic60b2_win.exe ]GW]dM try{ Zcx`SC-0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )8$=C#qC[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); tM'P m SiteFileFetch fileFetch = new SiteFileFetch(bean); 9-fLz?J fileFetch.start(); ,Ge"anO } Q o{/@ catch(Exception e){e.printStackTrace ();} RO'7\xvn Na]:_K5Dp k@k&}N0{ } Z/Dx,zIR <^5Z:n!q 4\8+9b\9" public static void main(String[] args) jK& h~) { rrik,qyv6 new TestMethod(); B#Vz#y } e#$]Y?, } Lr~=^{ 点击下载更多相关资料
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