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/* $t;:"i> **SiteFileFetch.java #%;Uh */ .]vb\NBK7 package NetFox; ~b~Tq import java.io.*; j9h/`Bn import java.net.*; 0DicrnH8 d{7ZO#E u4Nh_x8\Nr public class SiteFileFetch extends Thread { d0 )725Ia
zIrOMh nc;eNB SiteInfoBean siteInfoBean = null; //文件信息Bean K
";Et long[] nStartPos; //开始位置 ;g!rc#z2g long[] nEndPos; //结束位置 Q-oDmjU FileSplitterFetch[] fileSplitterFetch; //子线程对象 '.bf88D long nFileLength; //文件长度 TTVmm{6 boolean bFirst = true; //是否第一次取文件 L(;$(k-/( boolean bStop = false; //停止标志 O{l4 f:51 File tmpFile; //文件下载的临时信息 zTa5N DataOutputStream output; //输出到文件的输出流 ,JZ>)(@) +7gd1^|$e //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x &R9m, public SiteFileFetch(SiteInfoBean bean) throws IOException QR&e~rks { _^BA;S@ siteInfoBean = bean; ^K<3_D>1> //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Ur])*# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,4Q4{Tx if(tmpFile.exists ()) RzqgN*]lY { -hXKCb4YU bFirst = false; T aS1%( read_nPos(); KkCGL*]K } |cU75
S 1 else C<D$Y,[w { o`iA& nStartPos = new long[bean.getNSplitter()]; l5T[6C nEndPos = new long[bean.getNSplitter()]; @}4aF| } P2'N4?2 (mIjG)4t R/oi6EKv j0e,>X8 } kkjugm{D7 lOt7ij(,L |SOLC public void run() }MQ:n8
{ Og 1-LP|X //获得文件长度 \U$:/#1Oe //分割文件 v[Q)L!J1 //实例FileSplitterFetch i#la'ICwJ //启动FileSplitterFetch线程 QCbD^ //等待子线程返回 %R>n5m try{ 1Vu#:6% if(bFirst) e`n ZiM> { >/A]C$?3 nFileLength = getFileSize(); hoq2zDjD if(nFileLength == -1) c& ;@i$X( { ..JRtuM-v System.err.println("File Length is not known!"); U823q-x } M8~3 0L else if(nFileLength == -2) #s{^fUN6 { '{ _ X1 System.err.println("File is not access!"); \\R}3 >Wc } E]'
f&0s else (u &x.J { Or? )Nlg6x for(int i=0;i<nStartPos.length;i++) 7FE36Ub9 { ;dzL9P9IU nStartPos = (long)(i*(nFileLength/nStartPos.length)); KUJ Lx } R,BJr y for(int i=0;i<nEndPos.length-1;i++) Z[nHo' { p}QDX*/sSu nEndPos = nStartPos[i+1];
WwB_L.{ } [OCjYC` nEndPos[nEndPos.length-1] = nFileLength; e{E\YEc
} 2fTuIS<yr } 86=W}eV1r blQ&QQL i%FC
lMF //启动子线程 MDF_Xr-hZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; O(/~cQ for(int i=0;i<nStartPos.length;i++) }&vD(hX { yP{ 52%|+ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !Aj}sh{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), >Hnm.?-AWl nStartPos,nEndPos,i); V[(fE=cIN~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 'W(u. fileSplitterFetch.start(); xq((]5P y } GURiW42 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~]-n%J$q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); M G$+Blw> // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", iE'' >Z nEndPos = " + nFileLength); T_S3_-|{== // fileSplitterFetch[nPos.length-1].start(); v*!N}1+J +;~N; BT "s0,9;
} //等待子线程结束 (vG*)a //int count = 0; 46g0
e //是否结束while循环 'JOCL0FP boolean breakWhile = false; gO8d2?Oh BzfR8mD BaQyn 6B while(!bStop) E4% -*n { 5f7id7SI write_nPos(); |<u+Xi
~ Utility.sleep(500); %'1iT!g8 breakWhile = true; KVOV<uDCj m#UQ,EM 2 q4p- for(int i=0;i<nStartPos.length;i++) 9K@I { &\9%;k if(!fileSplitterFetch.bDownOver) f- XUto { &<;T$Y breakWhile = false; vqN/ crJ@ break; DP@1to@ } HFFG4' } DT`HS/~fH if(breakWhile) ;}SGJ7 break; Ye3o}G9z 84WDR? Oz6$u //count++; |N`0G.# //if(count>4) dNgA C){w // siteStop(); kU/MvoV } Nud =K'P= 1\fx57a\ )YAa7\Od System.err.println("文件下载结束!"); vcFR Td } 'd~(=6J catch(Exception e){e.printStackTrace ();} VZt%cq } Wo
"s ;Z S' $; !\7M7 //获得文件长度 kf'(u..G public long getFileSize() mFTuqujO { i F+:j8
b int nFileLength = -1; g8.z?Ia#5Z try{ IB&G#2M< URL url = new URL(siteInfoBean.getSSiteURL()); /ugWl99.W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8|zavH#P httpConnection.setRequestProperty("User-Agent","NetFox"); iHhdoY[] nook/ 7] :k_&Zd j,B int responseCode=httpConnection.getResponseCode(); C~T,[U if(responseCode>=400) 4*}&nmW { 2A\b-;4EP processErrorCode(responseCode); r<ww%2HTS return -2; //-2 represent access is error LL
e*|: } p/(Z2N" #$Zx ].[lc p? L%' String sHeader; (e'8>Pv RTh=x.
[QxP9EC for(int i=1;;i++) )l`Ks { Md~SzrU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vSHPN|* //Utility.log(in.readLine()); 6m$X7;x} sHeader=httpConnection.getHeaderFieldKey(i); ?7Cm+J if(sHeader!=null) =Smd/'`_ { J+t51B(a if(sHeader.equals("Content-Length")) c~tl0XU1 { &j:e<{@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /C8 }5) break; r{.pXf } F2
B(PGa7 } ;\w3IAa|V else o:{Sws(= break; nx%A s } 8p 4[:M@ } pK-tj catch(IOException e){e.printStackTrace ();} YA
pC|R,^ catch(Exception e){e.printStackTrace ();} z6U'"T"a lO cFF0' B(M-;F Utility.log(nFileLength); /!0&b? %j^QK>% A@>/PB6n return nFileLength; 0s-K oz } !AXLoq$SY [ifw}( A4,%l\di< //保存下载信息(文件指针位置) {xg=Ym) private void write_nPos() 'l(s)Oa{M: { 8|@) #: try{ iN8[^,2H| output = new DataOutputStream(new FileOutputStream(tmpFile)); d_we?DZ| output.writeInt(nStartPos.length); 'a0M.*f}G for(int i=0;i<nStartPos.length;i++) .I~:j`K6 { L|WrdT D; // output.writeLong(nPos); 60|PVsmDm output.writeLong(fileSplitterFetch.nStartPos); 4AEw[(t output.writeLong(fileSplitterFetch.nEndPos); |kh{EUE
; } HXT"&c| output.close(); Mlc_w19C9 } a0)w/A& catch(IOException e){e.printStackTrace ();} O\f`+Q`0 catch(Exception e){e.printStackTrace ();} }IWt\a<d } Yr{hJGw[ E+i(p+=4 8SRUqe[H] //读取保存的下载信息(文件指针位置) fNi&r0/-t private void read_nPos() ,ASNa^7/> { 4v>SXch try{ `^/8dIya DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ub
f5: int nCount = input.readInt(); P<X? nStartPos = new long[nCount]; Khd A;bF nEndPos = new long[nCount]; *g*"bi* for(int i=0;i<nStartPos.length;i++) pNd`fV#jX {
#C }+ nStartPos = input.readLong(); I)yaR+l nEndPos = input.readLong(); }O+xs3Uv } iPl,KjGk input.close(); <xSh13< } &-FG}|*4M catch(IOException e){e.printStackTrace ();} (b~l.@xh catch(Exception e){e.printStackTrace ();} \},H\kK+^ } -3yK>\y=| 5 ph CEKt; rZwSo]gp private void processErrorCode(int nErrorCode) (z8ZCyq7r[ { vcj(=\
e8v System.err.println("Error Code : " + nErrorCode); !i8)si_ } qN1fWU#$ rD21:1s ShL!7y*rT{ //停止文件下载 i/*)1;xsk public void siteStop() dH5*% { hN K wQ bStop = true; 43h06X` for(int i=0;i<nStartPos.length;i++) HqsqUS3[ fileSplitterFetch.splitterStop(); [2xu`HT02 9Vq
;UXV!8SM } h8O\sKn } VDOC> //负责部分文件的抓取 @7"n X **FileSplitterFetch.java wz3X;1l`c */ Jc?zX8>Ae: package NetFox; G~C-tAB 5\zR>Tg". (M|DNDM'd import java.io.*; Q?T+^J import java.net.*; (KN",u6F jNx{*2._r $k)K}U public class FileSplitterFetch extends Thread { kF'9@*?J qbSI98rw g$C]ln>"9m String sURL; //File URL +dLUq2 long nStartPos; //File Snippet Start Position ShVR{gIs long nEndPos; //File Snippet End Position Wn6m$ = int nThreadID; //Thread's ID ]r!|@AWrQ\ boolean bDownOver = false; //Downing is over c.1gQy$}| boolean bStop = false; //Stop identical JE{cZ<NNH FileAccessI fileAccessI = null; //File Access interface 2hNl_P~z1u jFg19C{=X WFc4(Kl public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException >{(c\oMD { k(tB+k!vH\ this.sURL = sURL; !21G$[H this.nStartPos = nStart; UVLS?1ra this.nEndPos = nEnd; CLZj=J2 nThreadID = id; >0:3CpO* fileAccessI = new FileAccessI(sName,nStartPos);//定位 O[$X36z } n~
$S aC=2v7* !Z>,dN public void run() #tUhul/O { TDfloDxA while(nStartPos < nEndPos && !bStop) `qd5+~c { m Qx1co .<%q9Jy# B>'J5bZsw try{ KXx;~HtO URL url = new URL(sURL); $#/8l58 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z%ZOAu&p httpConnection.setRequestProperty("User-Agent","NetFox");
:Kyr}- String sProperty = "bytes="+nStartPos+"-"; BQUYT/$( httpConnection.setRequestProperty("RANGE",sProperty); +KExK2= Utility.log(sProperty); 3ONW u LjGLi>kI~ ^"4?Q InputStream input = httpConnection.getInputStream(); o6 NmDv5 //logResponseHead(httpConnection); %#4;'\'5 G,Yctv M7Z&t'= byte[] b = new byte[1024]; (?uK int nRead; aH%tD!%,o while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Dz.kJ_"Ro
{ NI:OL
nStartPos += fileAccessI.write(b,0,nRead); | 9 *$6Y //if(nThreadID == 1) yTbtS- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K; hP0J } }Dcpe M? OmK0-fa/ O*/Utl Utility.log("Thread " + nThreadID + " is over!"); 2y$DTMu bDownOver = true; uU$/4{ //nPos = fileAccessI.write (b,0,nRead); ](-[
I# } v{lDEF@2^N catch(Exception e){e.printStackTrace ();} v(O@~8(I } @DM NLsQ } +LWgby4q # 6?2 2Os N8r+Q%ov //打印回应的头信息 `.VkR5/ public void logResponseHead(HttpURLConnection con) PMQ31f/zf { c}=[r1M* for(int i=1;;i++) &,XPMT { |M<R{Tt}nf String header=con.getHeaderFieldKey(i); 3!*`hQ;s if(header!=null) zhRF>Y` //responseHeaders.put(header,httpConnection.getHeaderField(header)); |`wJ
{- Utility.log(header+" : "+con.getHeaderField(header)); yYk?K<ou else T8T,G4Q break; _mQ~[}y+? } k
;vOPcw } z;YX2G/{ rA_r$X _cfAJ)8= public void splitterStop() -Vg0J6x { UU =,Brb bStop = true; pek5P4W_ } kc2E4i {;UBW7{ OH+2)X } z"sv,W 3@;24X [.G~5%974 /* Q6X}R,KA1 **FileAccess.java -Xgup,}? *//文件访问(定位,写) 7BA9zs392 package NetFox; h7]>b'H import java.io.*; 5FNf)F
p_3VFKq>0 7.^1I7O public class FileAccessI implements Serializable{ \w{fq+G '(($dT //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U@:iN.. RandomAccessFile oSavedFile; BS3BJwf;
f long nPos; T:j!a{_| pHDPj,lu uUpOa+t public FileAccessI() throws IOException ~65lDFY/ { ]7dal [i this("",0); @(tiPV } ==7=1QfP 8\Z/mU*4 O~#OVFJ9= public FileAccessI(String sName,long nPos) throws IOException CH h6Mnw { Y2p~chx9 oSavedFile = new RandomAccessFile(sName,"rw"); 5th\_n}N2/ this.nPos = nPos; oxqD/fY oSavedFile.seek(nPos); YC~kq? } p7)b@, :}w^-I" L@5g#mSl public synchronized int write(byte[] b,int nStart,int nLen) Zo(QU5m0 { 7\;gd4Ua1 int n = -1; fm%-wUgj try{ Op<|Oz$Q|l oSavedFile.write(b,nStart,nLen); myY@Wp n = nLen; ]
i\a[3 } ;6zp,t0 catch(IOException e)
?#;zB { @)wNINvD e.printStackTrace (); i_;]UvP } *8QGv6*vQ 8[z& g%u 9ev"BO return n; d `+cNKf }
>*mLbp" xSHeP`P^X cvf#^Cu
} S)\%.~ n ep"54o5=d u
kKp,1xz /* s*j0uAq)up **SiteInfoBean.java sh"\ kk9 */ 2L_ts= package NetFox; bMw)>4 "&/&v rx#\Dc}
public class SiteInfoBean { [0e}%!%M 0TI+6u q,a|lH private String sSiteURL; //Site's URL 9m
fYB private String sFilePath; //Saved File's Path .ZrQ{~t private String sFileName; //Saved File's Name OC]_b36v private int nSplitter; //Count of Splited Downloading File }A"%YDrNbG Y<S,Xr;J: (HkMubnqg public SiteInfoBean() %h%^i
{//nSplitter的缺省值为5 <vV?VV([ //default value of nSplitter is 5 {
O*maE" this("","","",5); d(L u|/~ } b='YCa |f~p3KCfV 'I_\ELb_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {^bs
}($J { h^5'i}@u sSiteURL= sURL; 1qb 3. sFilePath = sPath; E0}jEl/{ sFileName = sName; bd2"k;H<o this.nSplitter = nSpiltter; P$\vD^ GIDC' <Ep-aRI } b&!7(Q[ sT (6G5UwSt -_ [Z5%B public String getSSiteURL() #$Z|)i]w { 94F9f^ L return sSiteURL; j%KLp4J/e } 16YJQ ue fV_(P_C , c/\'k\K) public void setSSiteURL(String value) _Ucj)Ud k { !_cT_
WHty sSiteURL = value; mIZ#uW } 9 frS!AQ AtA}OY]D/ lV^sVN Z] public String getSFilePath() xgt dmv% { 8_ns^6XK5p return sFilePath; 52>?l C } pVw)"\S% Q<r O5 -K b#.hw2?a` public void setSFilePath(String value) vGC^1AM { G)?O!(_ sFilePath = value; 0QDm3V0n } "@E1^ W]n%$a ewk62{ public String getSFileName() /cr.}D2O { g R(*lXm5w return sFileName; M,PZ|=V6a } BjJ$I^ t.>vLzrU ;EE*#"IJ public void setSFileName(String value) xk}YeNVj { ~/hP6* sFileName = value; -X
Bh\w } 7k:}9M~ ?PSm)
~Oa rBkf @ public int getNSplitter() Q4Q*5> { 'j!7
O+7y return nSplitter; 6pQ#Zg()vp } VD.p"F(] !w98[BE7 +tOBt("5/ public void setNSplitter(int nCount) s%J|r{F6 { abCcZ<=|b nSplitter = nCount; ?4_^}B9 } z8= Gc$w! } >OwVNG ID5?x8o#k *KFsO1j /* !/['wv@ **Utility.java W<B8P S$ */ =[?2'riI package NetFox; 'e\m6~u\hm 3U@p oWo"`"P public class Utility { xue-5 ' lb&tAl"D ?U2ed)zzw public Utility() ^Y~ ,s { F1)Q#ThF\ Y1Bj++?2 kte
Dh7 } l@<^V N@ E[6JHBE*r //线程睡眠 >RBq&'f public static void sleep(int nSecond) OcMd'fwO { +:~&"U^z& try{ @iy ^a Thread.sleep(nSecond); )"jG)c^1* } }vxb, [# catch(Exception e) hX 9.%-@sR { 7|T5N[3?l, e.printStackTrace (); @C7S^|eo } m^O:k"+ ! } McxJ C< _W]2~9 //日志 .?_wcp= public static void log(String sMsg) ay'=M`uO_ { Cr4shdN34 System.err.println(sMsg); HHCsWe- } 8b(UqyV ]NuY{T&: -d%bc? public static void log(int sMsg) 5cxA,T { v.cB3/$z System.err.println(sMsg); :{LVS
nG } ~0|~Fg } 1F/`*z ;#3!ZB:} l8GziM{lp /* (bH "x **TestMethod.java [G[HQ)A */ vV#Jl)
A package NetFox; |j^>6nE jLD=EJ F]z xx public class TestMethod { >efYpd#^ 0$}+tq+ O<iE,PN) public TestMethod() uMPJ { ///xx/weblogic60b2_win.exe 5^GUuFt5m try{ *J8j_-i,R SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); /_x?PiL //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ~Rk6@&ZS} SiteFileFetch fileFetch = new SiteFileFetch(bean); 2p@Rr7 fileFetch.start(); Xn$]DE/r}N } I@+dE V`Lf catch(Exception e){e.printStackTrace ();} k-Jj k3 twNZ^=S Gr q^([ & + } sA3 4`ZAa lb{*,S t \DS}3pv public static void main(String[] args) U,[vfSDGr { yFl@z new TestMethod(); 9d#-;qV } 1f~unb\Gg } o`M7:8G 点击下载更多相关资料
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