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/* 0n{=%Q **SiteFileFetch.java YUk\Q% */ %1+4_g9 package NetFox; ~Z'?LV<t import java.io.*; /mzlH import java.net.*; Qt<&WB
fn S 30%)<W qUb& public class SiteFileFetch extends Thread { `<d }V2rdz 8KzkB;=n 2<}%kQ` SiteInfoBean siteInfoBean = null; //文件信息Bean b4N[)%@ long[] nStartPos; //开始位置 ^^ixa1H< long[] nEndPos; //结束位置 lL0APT; FileSplitterFetch[] fileSplitterFetch; //子线程对象 X#^[<5 long nFileLength; //文件长度 ]:J$w]\ boolean bFirst = true; //是否第一次取文件 - 1gVeT& boolean bStop = false; //停止标志 K[zVa File tmpFile; //文件下载的临时信息 a9Zq{Ysj DataOutputStream output; //输出到文件的输出流 {E|$8)58i SXP]%{@R/ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ab.(7GFK public SiteFileFetch(SiteInfoBean bean) throws IOException [ub e6 { 8Z=R)asGS siteInfoBean = bean; $6R-5oQ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &mS^ZyG tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mj7#&r,1l if(tmpFile.exists ()) MkXmA`cP { 8P\Zo8}v bFirst = false; Z6MO^_m2 read_nPos(); 'i|YlMFI g } ="l/ klYV else tw)mepwB { XfIJ4ZM5 nStartPos = new long[bean.getNSplitter()]; cQ}{[YO nEndPos = new long[bean.getNSplitter()]; =~LJ3sIX } /Z}}(6T !ULn7\@ l,aay-E rEz^ } zX i'kB i SQu#p@ 1s;Saq+ public void run() _
jlRlt { =:U`k0rn! //获得文件长度 Bk{]g=DO //分割文件 lr&a;aZp //实例FileSplitterFetch pEz_qy[# //启动FileSplitterFetch线程 ,|/f`Pl //等待子线程返回 buHJB*?9 try{ S$-7SEkO+ if(bFirst) '$+ogBS
{ sV*H`N')S nFileLength = getFileSize(); eS){1 if(nFileLength == -1) E92-^YY { z` b,h\
System.err.println("File Length is not known!"); 3=V&K- } z\4.Gm- else if(nFileLength == -2) >y+B { ~)M~EX&pK System.err.println("File is not access!"); {id4:^u&; } L-&\\{X else a?oI>8* { :b!s2n!u for(int i=0;i<nStartPos.length;i++) bcz:q/f}@ { M
D#jj3y nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2st3 } Vi|#@tC' for(int i=0;i<nEndPos.length-1;i++) wb ;xRP"w { (^>J&[= nEndPos = nStartPos[i+1]; #[[ en } PQE=D0 nEndPos[nEndPos.length-1] = nFileLength; JlJ a
# } 7uk[Oy<_ } aDN`6[ y>ktcuML IAyp 2 //启动子线程 !p/goqT~dY fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; A":T1s for(int i=0;i<nStartPos.length;i++) -F3-{E { dQG=G%W fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), f?)-}\[IR{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uEx-]F nStartPos,nEndPos,i); G KeU%x Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2>59q$| fileSplitterFetch.start(); -ze J#B)C } !TcJ)0
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -7|H}!DFT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (QiAisE // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", VS|2|n1<6 nEndPos = " + nFileLength); $NO&YLS@ // fileSplitterFetch[nPos.length-1].start(); \^1E4C\": @KUWxFak L4l!96]a //等待子线程结束 #,v{Ihn //int count = 0; 4`=mu}Y2 //是否结束while循环 I*^Ta{j[ boolean breakWhile = false; U`s{Jm
W!(LF7_! XB5DPx while(!bStop) )WFr</z5bA { 8a"%0d# write_nPos(); J?$,c4;W2 Utility.sleep(500); ,v}k{( 16{ breakWhile = true; ?Ss!e$jf K~EmD9 pmYHUj
# for(int i=0;i<nStartPos.length;i++) 6-ils3& { S0W||#Pr if(!fileSplitterFetch.bDownOver) f`66h M[ { H" 7u7l breakWhile = false; FXU8[j0P_G break; W=4FFl[ } 1m0c|ckb } @9|hMo if(breakWhile) U,1-A=Og{o break; I1&aM}y{G oe~b}: w@fi{H(R //count++; 7E!5G2XX~~ //if(count>4) Ilm^G}GB // siteStop(); Ny)X+2Ae } lqpp)Cq BING{ew jmW7)jT8: System.err.println("文件下载结束!"); sdmT } ENY+^7 catch(Exception e){e.printStackTrace ();} C$)onk } 8DaL,bi*. 'H <\x \xoP)Ub> //获得文件长度 "" ZQ/t\ public long getFileSize() }*"p?L^p{ { m&yJzMW| int nFileLength = -1; Jxm.cC5z. try{ y"wShAR URL url = new URL(siteInfoBean.getSSiteURL()); BIL Lq8) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7Hu3>4< httpConnection.setRequestProperty("User-Agent","NetFox"); c~
V*:$F
M\Kx'N v/=}B(TDF int responseCode=httpConnection.getResponseCode(); Owk |@6! if(responseCode>=400) <Q?F?.^e { >[*qf9$ processErrorCode(responseCode); (dSL7nel;L return -2; //-2 represent access is error 0{ R=9wcc } ,zY$8y] ;4~hB cYt!n5w~W String sHeader; ]OzUGXxo~ B^9j@3Ux "'\$
g[k for(int i=1;;i++) \)|hogI|f { 4{`{WI{ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~e@z;]CiY //Utility.log(in.readLine()); [cp+i^f sHeader=httpConnection.getHeaderFieldKey(i); u.Dz~$T if(sHeader!=null) DR<9#RRD { |
%Vh`HT if(sHeader.equals("Content-Length")) d>C$+v> { 7Jho}5J nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); '."ed%=MC break; @sC`!Rmy'- } kW&TJP+5* } 3:i@II else @I!0-OjL break; b1?'gn~ } 0:Ol7 } \P`hq^; catch(IOException e){e.printStackTrace ();} s!7y catch(Exception e){e.printStackTrace ();} /s}}&u/ @J`"[%U '1s0D] Utility.log(nFileLength); "1M[5\Ax 'SF<_aS( j eP return nFileLength; hZ } D!IY&H,wo wDe& 1(T^ ~FG]wNgS //保存下载信息(文件指针位置) ut7zVp<" private void write_nPos() 81
sG { |_@>*Vmg try{ HCC#j9UN6 output = new DataOutputStream(new FileOutputStream(tmpFile)); A{D];pE` output.writeInt(nStartPos.length);
}?Ai87-{ for(int i=0;i<nStartPos.length;i++) _>X+ZlpU: { UrEs4R1# // output.writeLong(nPos); Gu\q%'I output.writeLong(fileSplitterFetch.nStartPos); [:SWi1cK2 output.writeLong(fileSplitterFetch.nEndPos); 5taT5?n2 } l)l^[2 output.close(); ^ sLdAC } -4{<=y?"a catch(IOException e){e.printStackTrace ();} vuY~_ catch(Exception e){e.printStackTrace ();} m`^q <sj } P:MT*ra*, 8>in_h9 >jc [nk //读取保存的下载信息(文件指针位置) Q:d]imw!O private void read_nPos() ,M
^<CJ { Uf;^%*P4 try{ 9 X`Sm}i DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =R$u[~Xl2X int nCount = input.readInt(); :emiQ nStartPos = new long[nCount]; |"CZ T# nEndPos = new long[nCount]; = x)-u8P for(int i=0;i<nStartPos.length;i++) EaY?aAuS: { 0rs"o-s< nStartPos = input.readLong(); ]:k/Y$O2 nEndPos = input.readLong(); `Cynj+PCe } . ~~T\rmI input.close(); c2 C8g1n } Pw`8Wj catch(IOException e){e.printStackTrace ();} =|y9UlsD catch(Exception e){e.printStackTrace ();} h_,i&d@( } (2E\p ">,|V-H +.b,AqJ/ private void processErrorCode(int nErrorCode) aP@N)" { >rmqBDKaQ System.err.println("Error Code : " + nErrorCode); 9ZsVy } fW1CFRHH J$w<$5UY z3m85F%dR //停止文件下载 SBk4_J/_ public void siteStop() ?(F6#"/E {
goOCu bStop = true; Em
!/a$ for(int i=0;i<nStartPos.length;i++) Zbt.t]N fileSplitterFetch.splitterStop(); g63(E,;;J m6\E$;` lc1(t:"[ } Q}K"24`= } ^Hnb}L //负责部分文件的抓取 0#s"e}@v **FileSplitterFetch.java S8wLmd> */ :B5Fdp3 package NetFox; dI@(<R gpvYb7Of0 H.|#c^I import java.io.*; %G/hD import java.net.*; +-U- D?- Kp~VS<3 SpLzm A public class FileSplitterFetch extends Thread { rv^@, 8vq n&;85IF1 TA`1U;c{n String sURL; //File URL HIR~"It$
long nStartPos; //File Snippet Start Position bz2ztH9 n long nEndPos; //File Snippet End Position n,V[eW#m'L int nThreadID; //Thread's ID FaQe_; boolean bDownOver = false; //Downing is over 2~1SQ.Q<RY boolean bStop = false; //Stop identical y^,1a[U. FileAccessI fileAccessI = null; //File Access interface ]}-7_n#cC ,c$_t+ kHghPn?8] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException RXpw! { QQ*hCyw! this.sURL = sURL; ug!s7fo^ this.nStartPos = nStart; nwB_8mN| this.nEndPos = nEnd; mPtZO*Fc nThreadID = id; z0p*Z& fileAccessI = new FileAccessI(sName,nStartPos);//定位 "3)C'WlEy/ } B:;pvW] I {S;L ~q@|l3?$ public void run() 7a=gH2]& { /7nb,!~~l while(nStartPos < nEndPos && !bStop) W#4 7h7M { G7`ko1- J{p1|+h% 7 S#J>* try{ (>UZ<2GPL URL url = new URL(sURL); N
,'GN[s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @w#-aGJO httpConnection.setRequestProperty("User-Agent","NetFox"); xaq-.IQAM$ String sProperty = "bytes="+nStartPos+"-"; lk^Ol&6 httpConnection.setRequestProperty("RANGE",sProperty); ??-[eB. Utility.log(sProperty); ?>D+ge fnjPSts0 P_dCR InputStream input = httpConnection.getInputStream(); V%7WUq //logResponseHead(httpConnection); ?mwt~_s9 =t#llgi~ o lR?n(v byte[] b = new byte[1024]; {NmWQyEv int nRead; \+oQd=K@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) '1P2$# { 4x=v?g& nStartPos += fileAccessI.write(b,0,nRead); >\-hO&%_ //if(nThreadID == 1) >a!/QMh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h0*!;Z7 } Go`vfm"S *.ll<p+(- er("wtM Utility.log("Thread " + nThreadID + " is over!"); |k )=0mCz bDownOver = true; s[RAHU //nPos = fileAccessI.write (b,0,nRead); ;V:i!u u } {g'(~ qv catch(Exception e){e.printStackTrace ();} |{z:IQLv } .wEd"A&j } jnkR}wAA 6C1#/ zq3\}9 //打印回应的头信息 -V*R\,> public void logResponseHead(HttpURLConnection con) .Yamc#A- { t>L2 for(int i=1;;i++) fbyd"(V8r { oM
X String header=con.getHeaderFieldKey(i); S*,17+6dV if(header!=null) NJ%P/\ C //responseHeaders.put(header,httpConnection.getHeaderField(header)); aj-Km`5r} Utility.log(header+" : "+con.getHeaderField(header)); z 4e7PW| else rX U break; $!-yr7 } J@/kIrx } E'f{i:O"~ y B81f 0.Q
Ujw public void splitterStop() ]
7[
3>IN { [CTnXb bStop = true; M:=J^0 } H-!,yte cRC6 s8 (fhb0i- } "syI#U{ kl"hBK#D% _kC-dEGf!y /* 1;* cq **FileAccess.java %6t:(z *//文件访问(定位,写) xEa\f[.An package NetFox; b3P+H r import java.io.*; 8 %:Iv(UMk ^23~ZHu d.aS{;pse public class FileAccessI implements Serializable{ 0RzEY!9g+ XjB W9a //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 gZVc 5u< RandomAccessFile oSavedFile; 9FF0%*tGo long nPos; 1l9G[o
* UklUw (xycJ`N public FileAccessI() throws IOException ??5Q)Erm1 { ]iVcog"T this("",0); >k|5Okq g } _9ao?: rDtY[ C-xr"]#] public FileAccessI(String sName,long nPos) throws IOException D#aDv0b { n>z9K') oSavedFile = new RandomAccessFile(sName,"rw"); sVQ|*0(J0r this.nPos = nPos; 4>YR{ oSavedFile.seek(nPos); _r#Z}HK } $L`d&$Vh VD AaYDi I]|Pq public synchronized int write(byte[] b,int nStart,int nLen) e
v}S+!|U { SZ7:u895E int n = -1; q$L%36u~/ try{ l03B=$ oSavedFile.write(b,nStart,nLen); j{ ]I]\=? n = nLen; LG0;#3YwH } q~Hn-5H4Q catch(IOException e) MBK^FR-K { 2g
`o e.printStackTrace (); Ha#=(9. } pp?D7S _`$qBw.Nx eSn+ B;
return n; XTs8s12 } j8i[ONq^ > tS'Q`R @/~omg}R } (y'hyJo 9yu\ Ot ho{*Cjv /* BU)U/A8iS **SiteInfoBean.java W-f=]eWg */ <\y@*fg+ package NetFox; O^PKn_OJ a~`eQ_ND ;<Sd~M4f public class SiteInfoBean { 2>9C-VL2 )iX~}7 L<S9 private String sSiteURL; //Site's URL qx(xvU9 private String sFilePath; //Saved File's Path ~\SGb_2 private String sFileName; //Saved File's Name yF:1( 4 private int nSplitter; //Count of Splited Downloading File ;a!S!%.h T"Y+m-<% 234p9A@ public SiteInfoBean() @u+]aI!`- {//nSplitter的缺省值为5 68|E9^`l //default value of nSplitter is 5 urc|
D0n this("","","",5); K g*Q } "!P3R1;% KkyVSoD\ 5ta `%R_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &E F!OBR { ,,.QfUj/& sSiteURL= sURL; g/_5unI}u sFilePath = sPath; ^e5=hH-% sFileName = sName; _ye |Y this.nSplitter = nSpiltter; MKCsv+ TqQB@-! "cGk)s } ztY}5A2` Paq4 $Wol?)z public String getSSiteURL() h*a(_11 { A2FYBM`Q&D return sSiteURL; ?81c 4w } AN m
d! aK~8B_5k8 [aLI
' public void setSSiteURL(String value) ;1=1:S8 { 2.y-48Nz sSiteURL = value; T{^rt3a } rXq.DvQ A@('pA85 T<>,lQs(a public String getSFilePath() (E3b\lST { B mb0cFQ return sFilePath; [DOckf oZx }
8W7J3{d ) q4[zv9 >|=ts public void setSFilePath(String value) Uc>lGo1j { MchA{p&Ol sFilePath = value; LOYk9m } (mB&m@-N }>|s=uGW Y|qTyE% public String getSFileName() ,qwuLBW { yPp9\[+^j return sFileName; ~8+ Zs } {Xy5pfW
Q G_JA-@i% q
i;1L
Kc public void setSFileName(String value) tOD6&< { djZqc5t sFileName = value; FV!q!D } WU`
rh^ Fo_sgv8O< ajT*/L!0_ public int getNSplitter() kD%( _K5 { 'LC1(V!_j return nSplitter; T-L||yE,h } \)[j_^ j$:~Rek }X6m:#6 public void setNSplitter(int nCount) *^4"5X@ { mJnIwdW* nSplitter = nCount; J8(lIk:e } ]m<$} } CRE3icXbQ RqrdAkg tk`v:t!6U /* X_h}J=33Q **Utility.java ~mxO7cy5Cg */ Fxz"DZY6 package NetFox; =T@1@w ~!L}yw 7$=InK public class Utility { kJ}`V Hn"RH1Zy GVn!O1jio public Utility() n>YKa)|W` { VONDc1%ga 0h_|t-9j Yq
KCeg } D,feF9 =,M5KDk` //线程睡眠 :I#V. public static void sleep(int nSecond) .q>iXE_c { &8lZNv8;(p try{ ux4POO3C| Thread.sleep(nSecond); #6= } (<9u-HF# catch(Exception e) "to;\9lP { 4r}51 N\ e.printStackTrace (); hgq;`_;1, } 4WB0Pt{ } M= (u]%\ })%{AfDRF //日志 |6-nbj public static void log(String sMsg) AK4t\D)K1 { !a\^Sk
/ System.err.println(sMsg); 59u}W 0 } >(<f 0 L4W5EO$ h*\%vr public static void log(int sMsg) :2`e(+Uz { He@KV= System.err.println(sMsg); %|oym.-I6
} m&3xJuKih } :3 mh@[V $`8wJf9@w z1a7*)8P /* KI.hy2?e **TestMethod.java d'> x(Yi */ c+ie8Q! package NetFox; [}m[ )L\ ?Bmb' 3 :`sUt1Fw. public class TestMethod { kJR`:J3DJ |.dRily+ Z\sDUJ public TestMethod() i6Gu@( 8Q { ///xx/weblogic60b2_win.exe z$sGv19pB try{ zQ PQ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8P`"M#fI //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :4|4 =mkr SiteFileFetch fileFetch = new SiteFileFetch(bean); j>kqz>3 fileFetch.start(); RnN!2K } %TqC/c catch(Exception e){e.printStackTrace ();} &^nGtW%a 9 U0+-W07> O6Y0XL } rC5O")I< An@t?#4gxi xSu > public static void main(String[] args) 6LhTBV { 5r0YA
IJ new TestMethod(); Ys7]B9/1O } 7EJ+c${e.- } *1"+%Z^ 点击下载更多相关资料
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