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/* R*GBxJaw **SiteFileFetch.java (iKJ~bJ */ xLed];2G package NetFox; yPE3Awh5 import java.io.*; B/X$ZQ0 import java.net.*; >5O~SF. [IHo
~ GVhqNy
public class SiteFileFetch extends Thread { KHx2$*E_ s.4+5rE ;gBR~W SiteInfoBean siteInfoBean = null; //文件信息Bean 2]kGDeSr long[] nStartPos; //开始位置 1$RJzHS long[] nEndPos; //结束位置 ]9_gbQ FileSplitterFetch[] fileSplitterFetch; //子线程对象 NL]_;\ h long nFileLength; //文件长度 1 b7jNkQ boolean bFirst = true; //是否第一次取文件 J4+WF#xI2 boolean bStop = false; //停止标志 iw#~xel<ez File tmpFile; //文件下载的临时信息 {.Qv1oOa DataOutputStream output; //输出到文件的输出流 aV5M}:D #E+ybwA //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) G^B>C public SiteFileFetch(SiteInfoBean bean) throws IOException +iQ@J+k
{ 7R:j^"I@ siteInfoBean = bean; HGAi2+& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); B*_K}5UO tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0
s+X:*C~ if(tmpFile.exists ()) KBM*7raA { *AV%= bFirst = false; \me5"ZU read_nPos(); # fqrZ9:@ } xHt7/8wF else A+^okT37r { N.mRay, nStartPos = new long[bean.getNSplitter()]; D?#l8 nEndPos = new long[bean.getNSplitter()]; NzAh3k } $'KQP8M+ .@): Uh Z,"4f*2 UYxn?W.g } mrr]{K ?98!2:'{9 ='jT
5Mg public void run() ~AjPa}@ f { /4O))}TX //获得文件长度 T1q27I //分割文件 +D5gbxZX //实例FileSplitterFetch A|LO!P,w //启动FileSplitterFetch线程 56JQ h //等待子线程返回 6D
Xja_lp try{ c2NB@T9'v if(bFirst) j4,y+9U { ~ 1;M4K nFileLength = getFileSize();
@_f^AQ if(nFileLength == -1) dwk%!% { tC|?Kl7 System.err.println("File Length is not known!"); uD@ZM }
g*a+$' else if(nFileLength == -2) `(HvD] l { 7;|"1H:cmw System.err.println("File is not access!"); O:#YLmbCN } ^vMlRt; else M6&=- { <Q(E {c3" for(int i=0;i<nStartPos.length;i++) )Zr\W3yWX { T#Q7L~?zY nStartPos = (long)(i*(nFileLength/nStartPos.length)); WP*}X7IS } yZ{yzv'D& for(int i=0;i<nEndPos.length-1;i++) Uj;JN}k { ="78#Wfj2 nEndPos = nStartPos[i+1]; "x R6~8 } hlL$3.] nEndPos[nEndPos.length-1] = nFileLength; ]=t}8H } C jf<,x$ } zc8^#D2y& sJx_X8 lIS`_H} //启动子线程 zHA::6OgPN fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; R& t*x for(int i=0;i<nStartPos.length;i++) @Dfg6<0 { p/
xlR[ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /i8OyRpSyk siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), r'Wf4p^Xd nStartPos,nEndPos,i); la<.B^ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); kr+p&|. fileSplitterFetch.start(); x)=l4A\ } nBp6uNK[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 27N;> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _|US`,kfc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", tkZUjQIX nEndPos = " + nFileLength); K-:y // fileSplitterFetch[nPos.length-1].start(); %:'G={G`QH 1SztN3'q 27fLW&b2 //等待子线程结束 msgR"T3' //int count = 0; }O7sP^ //是否结束while循环 /V 09Na,N boolean breakWhile = false; l#enbQ`-~ ya1
aWs~ :0:Tl/)) while(!bStop) C0[U}Y/r2 { 'UhHcMh: write_nPos(); "\EX)u9ze Utility.sleep(500); ss%, breakWhile = true; B?i#m^S ~D3S01ecM VA[EY`8 for(int i=0;i<nStartPos.length;i++) oaqH@` { yn}Dj9(q if(!fileSplitterFetch.bDownOver) \1G'{#Q { ]O@iT= *3 breakWhile = false; te(H6c#0 break; iV/I909*'' } JD#q6&| } =gI41Y] if(breakWhile) d~qQ_2M[G break; U.,S.WP+d NH|I>vyN 'Z~ZSu //count++; dvjj"F'Bf //if(count>4) UgAp9$=z // siteStop(); KxK,en4)+ } _Z]l=5d 0\:=KIY. x7/Vf,N System.err.println("文件下载结束!"); ={;pg( } {EvT7W catch(Exception e){e.printStackTrace ();} Qz(2Iu{E] } +Mq\3 A]!0Z:{h% ldUZ\z(* //获得文件长度 v|(]u3=1_ public long getFileSize() K bLSK { w{aGH/LN int nFileLength = -1; nRc\!4 try{ ~Pw9[ycn3 URL url = new URL(siteInfoBean.getSSiteURL()); j%s,%#al HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pFS@yHs httpConnection.setRequestProperty("User-Agent","NetFox"); O8.xt|
.4\I?
\85%d0@3 int responseCode=httpConnection.getResponseCode(); neM.M)0 if(responseCode>=400) c`;oV-f { Jm<NDE~rw processErrorCode(responseCode); syBpF:`-W return -2; //-2 represent access is error jKmjZz8L]% } 4,LS08&gh Kg';[G\ Ck
)W= String sHeader; Zb=NcEPGy J[:#(c&c!1 k)-+ZmMOh for(int i=1;;i++) %TQ4ZFD3 { 1"Oe*@`pV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); e-y$&[
//Utility.log(in.readLine()); YCiG~y/~ sHeader=httpConnection.getHeaderFieldKey(i); n7bVL#Sq[ if(sHeader!=null) 8c.>6
Hy { gZtQtFi if(sHeader.equals("Content-Length")) UxNn5(:sM@ { bK%F_v3' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P}8hK break; \)/qCeiZ } aeUgr! } }{N#JTmjB# else 'O)v@p " break; =h4uN, } !6=s{V&r1 } dPu27 " catch(IOException e){e.printStackTrace ();} bs|gQZG catch(Exception e){e.printStackTrace ();} DQY1oM)D! *d C| X qY8; k
# Utility.log(nFileLength); C{/U;Ie-b K*j
OrQf` DGGySO6=$e return nFileLength; ivgX o'= } f?.VVlD KX~
uE6rX n R, QG8 //保存下载信息(文件指针位置) r5s{t4 ;Ch private void write_nPos() Z~Q5<A9Jz { t RU/[?! try{ !QwB8yK@ output = new DataOutputStream(new FileOutputStream(tmpFile)); L?nhm=D output.writeInt(nStartPos.length); U>*@VOgB for(int i=0;i<nStartPos.length;i++) Ne+Rs+~4 { R?)Yh.vi=t // output.writeLong(nPos); pP.`+vPi output.writeLong(fileSplitterFetch.nStartPos); (9]1p; output.writeLong(fileSplitterFetch.nEndPos); DL V ny] } h81giY] output.close(); xBxiBhqzF } 3y.+03
W catch(IOException e){e.printStackTrace ();} Fxa{
9'99 catch(Exception e){e.printStackTrace ();} E|9`J00 } [xM&Jdf8 R-zS7Jyox ,Dv*<La`\ //读取保存的下载信息(文件指针位置) k:?)0Uh%^ private void read_nPos() ~s&r.6DW { eg*a Vb try{ q0%QMut% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); p+iNi4y@ int nCount = input.readInt(); t }4 nStartPos = new long[nCount]; GjwH C{ nEndPos = new long[nCount]; !q$VnqFk for(int i=0;i<nStartPos.length;i++) ,K}"o~z { 'yH nStartPos = input.readLong(); &V+_b$ nEndPos = input.readLong();
uSXnf } ;L fn&2G input.close(); 3L==p`
} cRKLyb catch(IOException e){e.printStackTrace ();} Me z&@{ catch(Exception e){e.printStackTrace ();} u^SInanw } cu1!WD |s/Kb]t vW.f`J,\D' private void processErrorCode(int nErrorCode) VOj7Tz9UD { \1<aBgKi System.err.println("Error Code : " + nErrorCode); <[ dt2)%L> } L=;T$4+p FUSe!f *Jcd_D\-(1 //停止文件下载 ?;Sg,.J public void siteStop() #7 H0I8 { lPz`?Hn bStop = true; DW,ERQ^ for(int i=0;i<nStartPos.length;i++) =k d-rIBc fileSplitterFetch.splitterStop(); 56YqYu. ,k.") , SUx!o } \h[*oeh } rhOxyY0 //负责部分文件的抓取 ~1TT ?H **FileSplitterFetch.java zK~_e\m */ }#.OJub package NetFox; ~h<T0Zc dCn9]cj/ Tr>_R%b K import java.io.*; Rmn|!C%%K import java.net.*; 5hEA/G ,^
,R .T +(Hp ".gU public class FileSplitterFetch extends Thread { z+oy#p6+F. hB<(~L?A] !_+FuF"@ String sURL; //File URL b"o\-iUioe long nStartPos; //File Snippet Start Position <J~6Q long nEndPos; //File Snippet End Position Edc3YSg%; int nThreadID; //Thread's ID L}Sb0 o. boolean bDownOver = false; //Downing is over /AX)n:, boolean bStop = false; //Stop identical t^Bs3;E^ FileAccessI fileAccessI = null; //File Access interface Q& d;UVp D
dwFKc& KRm)|bgE public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bRFZ:hu l { .(p_YjIA this.sURL = sURL; 9`qw,X&AK_ this.nStartPos = nStart; #(}{*dR this.nEndPos = nEnd; ZX-A} nThreadID = id; N49{J~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 KJ&I4CU]^ } Zd)LVc[ Yt_tAm PU\xF t public void run() Qg1kF^= { dw}ge,bBic while(nStartPos < nEndPos && !bStop) Tl"r# { !}mM"|< :Id8N~g e
GAto try{ !RLXB$@` URL url = new URL(sURL); W4qT]m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3&[ d.,/ httpConnection.setRequestProperty("User-Agent","NetFox");
StNA(+rT String sProperty = "bytes="+nStartPos+"-"; &sn-;r httpConnection.setRequestProperty("RANGE",sProperty); xzx~H>M Utility.log(sProperty); :zIB3nT^ /3Y"F"`M. !6taOT>v InputStream input = httpConnection.getInputStream(); WuWOC6^ //logResponseHead(httpConnection); k;Qm%B b:O_PS5h |'}r-} byte[] b = new byte[1024]; ooa"Th< int nRead; {J)gS while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) asvM/ 9 { o@$pyU8 nStartPos += fileAccessI.write(b,0,nRead);
OS(Ua //if(nThreadID == 1) $WW7, // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UY *Z`$ } ;x|?N* Hjs#p{t[ btC<>(kl& Utility.log("Thread " + nThreadID + " is over!"); ;&w_.j*Is bDownOver = true; .db:mSrL //nPos = fileAccessI.write (b,0,nRead); lUnC+w#[ } &F0>V o catch(Exception e){e.printStackTrace ();} \,nhGh } #K-O<:s=y } m=iKu(2xRq j}}as (L1O;~$ //打印回应的头信息 w2!5TKZ` public void logResponseHead(HttpURLConnection con) $Vs5d=B { {A MAQ for(int i=1;;i++) Ql}#mC.>/ { 5@bmm] String header=con.getHeaderFieldKey(i); d_V7w4lK if(header!=null) ygV-Fv>PQ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ey>tUmt6? Utility.log(header+" : "+con.getHeaderField(header)); 0x,4H30t( else [--] ?Dr break; ZD?LsD 3 } \Z/0i| } &oVZ2.O#( <&1hJ)O *$t =Lh public void splitterStop() ;,KT+!H$ { YpSK|( bStop = true; S6yLq|W0 } pug;1UZ '<C#"2 =p8iYtI } (iO/@iw 2+YM .Zl wD pL9 q /* do< N+iK **FileAccess.java ?,Wm|xY *//文件访问(定位,写) dlV HyCW package NetFox; FePWr7Ze import java.io.*; $L]E<
gWrP 7c'OIY]., ~05(92bK public class FileAccessI implements Serializable{ Oh=Kl3xs ~X) 1!Sr //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6,p;8I RandomAccessFile oSavedFile; ?+{qmqN long nPos; ot^$/(W cn$0^7? {`% q0Nr public FileAccessI() throws IOException !V0)eC50 {
7I@@}A this("",0); g.Kyfs4` } hya
$Vp Eds{-x|10 s(Fxi|v; public FileAccessI(String sName,long nPos) throws IOException TGG-rA6@Lx { OimqP oSavedFile = new RandomAccessFile(sName,"rw"); 2\xEMec this.nPos = nPos; _7-P8"m oSavedFile.seek(nPos); Zdu8axK: } G"prq& kkV*#IZ z
2Ao6*% public synchronized int write(byte[] b,int nStart,int nLen) rEsGf+4 { r}XsJ$ int n = -1; rx(z:: try{ lz0'E'%{P oSavedFile.write(b,nStart,nLen); FPuF1@K n = nLen; 9D& 22hL4 } Z7?-c catch(IOException e) ddeH-Z { m-|~tve e.printStackTrace (); Ha!]*wg# } nTXM/ @1peJJ{ P/~kX_ return n; v0~*?m4 } a)M#O\i` - z"D_5 n@| &jh } ^Ea^t.c}_ x;>~;vmi JKYkS*.a} /* Z=/bD*\g **SiteInfoBean.java 8` f=Eh */ Eh?,-!SUQn package NetFox; F5EsaF'e4 {
BDUl3T 92Df.xI} public class SiteInfoBean { \bWo"Yo @D&}ZV=J ^U@Erc#d private String sSiteURL; //Site's URL ;1woTAuD private String sFilePath; //Saved File's Path T! fF1cpF\ private String sFileName; //Saved File's Name J@pCF@' private int nSplitter; //Count of Splited Downloading File 3%SwCYd km#Rh^ ]$a,/Jt public SiteInfoBean() 7<3eB)S {//nSplitter的缺省值为5 D|R,$v: //default value of nSplitter is 5 [H2"z\\u this("","","",5); >Sh"/3%q } M8'
GbF=1 "G
@(AE( x 3?:"D2 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <gc\,P<ru { \ HZ]=B#0 sSiteURL= sURL; 3a]Omuu|= sFilePath = sPath; xp"5L8:C sFileName = sName; z>./lu\ this.nSplitter = nSpiltter; +oMe\wYR$r 9zK5Y+! ZQPv@6+oY } "~zQN(sR"P bMpCQ a6fqtkZ x public String getSSiteURL() 1k! xG$g0 { Epf[8La return sSiteURL; X$4 5<oz } 5PU$D`7it /SDDCZ`;|c XT
'v7 public void setSSiteURL(String value) {Deg1V!x> { i=G.{. sSiteURL = value; qdeS*rp\ } -P>f2It F)g.xQ 4chSo.= 4V public String getSFilePath() KD5} Nk)t { (qM(~4|` return sFilePath; "Gh?hU,WWZ } Tp0^dZ M+ zf>r@>S!L :.
ja~Q public void setSFilePath(String value) w;p!~o & { MHVHEwr.{ sFilePath = value; D.\s mk } :{Crc E1e#E3Yq}s 1"Z61gXrz public String getSFileName() #YMU}4=: { N6BFs( return sFileName; pK~K>8\ } |P"p/iY L:g!f
]M;aVw<! public void setSFileName(String value) TZ,kmk# { szy^kj^2 sFileName = value; m
pWmExQ } c_xo6+:l ?u9JRXj% >=_Z\ wA public int getNSplitter() Iq-+X3i { W 6m
oFn return nSplitter; +EWfsKz } aT %A<'O! u~9gR @e2{ {)QSxO public void setNSplitter(int nCount) Ox` +Z0)a { `E),G;I nSplitter = nCount; /Af:{|'$% } 62 biOea } u-a* fT k-b0Eogp] fQ^45ulz /* 9)a:8/Y **Utility.java /k(KA [bS */ |\OG9{q package NetFox; Zw[A1!T, ;{e ;6Hq K)AJx" public class Utility { ;@$B{/Q ?{"_9g9 il \q{Y
o public Utility() fr1/9E; { $Y!$I.+ 4$=Dq$4z x*A_1_A } Ifm|_ s4RqMO5eI //线程睡眠 luyU! public static void sleep(int nSecond) 6Y|jK<n?H { ; c'9Xyl- try{ Q_bF^4gt Thread.sleep(nSecond); eJB !| } =?}
t7}# catch(Exception e) l0m\2Ttf { (bIg6_U7\ e.printStackTrace (); 2sJj -3J } c8cV{}7Kb } {o?+T);Z L+}q !'8S //日志 ab 1qcQ< public static void log(String sMsg) \k{UqU+s { g9fS|T System.err.println(sMsg); p=Nord } 8\BCC1K +6=2B0$
r Xi]WDH \ public static void log(int sMsg) Mb6#97 { &VIX?UngE System.err.println(sMsg); W?a2P6mAh } K0#kW \4` } asDq(J`sQ !vU$^>zo~ 0ivlKe% /* 5YlY=J **TestMethod.java DlkHE8r\ */ ?qeBgkL(B^ package NetFox; JCu3,O!q _R!KHi ps#+i public class TestMethod { :>U2yI u.wm;eK[ fX,L;Se" public TestMethod() 7gR8Wr ^ { ///xx/weblogic60b2_win.exe 2 0Xqs, try{ |fMjg'%{} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,O@xv //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); I*/?*p/I SiteFileFetch fileFetch = new SiteFileFetch(bean); "p43# fileFetch.start(); aI$D
qnF4 } 4~Ptn / g catch(Exception e){e.printStackTrace ();} =)Cqjp uaMf3HeYV x/NR_~Rnk } qRg^Bp'VD# Ex'6 WN~kD
5:mS~ public static void main(String[] args) fUh7PF% { D"WqJcDt new TestMethod(); 6N}>@Y5 } Vy-EY*r| } -jc8ku3* 点击下载更多相关资料
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