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/* [L`ZE*z **SiteFileFetch.java _iKq~\v2 */ j hYToMq package NetFox; .Ig+Dj{) import java.io.*; +h^jC9,m~{ import java.net.*; mE O\r|A wS+V]`b <H3ezv1M public class SiteFileFetch extends Thread { q/3ziVd7p ,jA)wJ R2etB*k6[ SiteInfoBean siteInfoBean = null; //文件信息Bean spU)]4P& long[] nStartPos; //开始位置 0tISXu- long[] nEndPos; //结束位置 d\MLOXnLq; FileSplitterFetch[] fileSplitterFetch; //子线程对象 "xcX'F^ long nFileLength; //文件长度
N#V.1<Y boolean bFirst = true; //是否第一次取文件 I jr\5FA[p boolean bStop = false; //停止标志 !g~1&Uw1 File tmpFile; //文件下载的临时信息 65z" DataOutputStream output; //输出到文件的输出流 ^
&E}r{? -aRU]kIf //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) :.(;<b<\ public SiteFileFetch(SiteInfoBean bean) throws IOException uZa9zs=}c { I{JU-Jk| siteInfoBean = bean; #ywk|k5z] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); M)*\a/6?{ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W)'*m-I if(tmpFile.exists ()) MUOa@O, { bQe^Px5
!. bFirst = false; (npj_s!.C) read_nPos(); 5tJ,7Y' } *vgl*k?) else R(.}C)q3 { s?8<50s nStartPos = new long[bean.getNSplitter()]; 9[!,c`pw nEndPos = new long[bean.getNSplitter()]; u&G.4QQF } (%iRaw7hp MRU7W4W-~/ tH=P6vY 3X9b2RY*L/ } b[z]CP PFUO8>!pA\ }:: S0l public void run() l1ZY1#%j { PcB_oG g //获得文件长度 Q
4CjA3 //分割文件 #T`t79*N //实例FileSplitterFetch 8x`.26p //启动FileSplitterFetch线程 fQrhsuCrC //等待子线程返回 ( mxT2"fC try{ Ehzo05/! if(bFirst) Va Z!.#(P { dd2[yKC` nFileLength = getFileSize(); OY[e.N
t& if(nFileLength == -1) Cs2;z:O] { ?!qY,9lhH System.err.println("File Length is not known!"); Uax+dl } fEB7j-t else if(nFileLength == -2) 7+./zN { Vcd.mE(t% System.err.println("File is not access!"); 3+>G#W~ } hF2IW{=! else AM=z`0so { kq\)MQ"/X for(int i=0;i<nStartPos.length;i++) +C7 ~b~ % { zMIT}$L nStartPos = (long)(i*(nFileLength/nStartPos.length)); **69rN } {M,,npl for(int i=0;i<nEndPos.length-1;i++) TW !&p"Us+ { hdTzCfeZ5@ nEndPos = nStartPos[i+1]; %;#^l+UB } E.1J2Ne nEndPos[nEndPos.length-1] = nFileLength; MX@IHc } !w
BJ,&E } TAjh"JJIV (EPsTox fs/*V~@ //启动子线程 j}b\Z9)! fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; QMv@:Eo for(int i=0;i<nStartPos.length;i++) `y#UJYXQE { UH7jP#W%= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Z{?G.L*/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), s3Cc;# nStartPos,nEndPos,i); Jk,;JQ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5zON}"EC fileSplitterFetch.start(); 8p[)MiC5W^ } Vh>Z,()>>@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p~LrPWHSTP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); n~VD uKn9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", <nEi<iAY>U nEndPos = " + nFileLength); f6$b
s+oP // fileSplitterFetch[nPos.length-1].start(); E7-@&=]v A!^q
J# &^4++ //等待子线程结束 qZ@s#UiB //int count = 0; w3jO6*_ M //是否结束while循环 vq34/c^ boolean breakWhile = false; r(gXoq_w !?Wp+e6 4&l10fR5 while(!bStop) !A48TgAeE { iiK]l write_nPos(); @JdZ5Q Utility.sleep(500); Haqm^Ky$ breakWhile = true; >:lnt /N3 e}1uz3Rh hMtf.3S7c for(int i=0;i<nStartPos.length;i++) s+>:,U<A { n]he-NHP if(!fileSplitterFetch.bDownOver) +^;JS3p@\ { <$JaWL breakWhile = false; (p%>j0< break; A_KW(;50 } y(K"
-? } ~i 7^P9 if(breakWhile) K_&4D' break; QY= = GfHt Y3Q9=u*5 $ImrOf^qt //count++; 4`,j =3 //if(count>4) Dc)dE2 // siteStop(); 1^gl}^|B } Z1"v}g hpU2 2;w*oop,O System.err.println("文件下载结束!"); @IXsy } ->N8#XH2= catch(Exception e){e.printStackTrace ();} >rvQw63\ } CirZ+o U(x]O/m jlxpt)0i //获得文件长度 2#k5+?-c61 public long getFileSize() H/}]FmjN { NVRLrJWpp int nFileLength = -1; *?MGMhE try{ fDLG>rXPT URL url = new URL(siteInfoBean.getSSiteURL()); .ji_nZ4.+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ha)ANAD httpConnection.setRequestProperty("User-Agent","NetFox"); +@r*} f5 `g _o8?E&d int responseCode=httpConnection.getResponseCode(); o=1X^, if(responseCode>=400) JfPD}w { G}p\8Q}' processErrorCode(responseCode); ++E3]X| return -2; //-2 represent access is error Z@r.pRr'
} {5
sO $q 2D+_ c [5KG} String sHeader; NF?
vg/{ CD8}I85K mx=BD' for(int i=1;;i++) vhhC>
7 { Q$fmD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A@Dw<.&_I //Utility.log(in.readLine()); sq'Pyz[[ sHeader=httpConnection.getHeaderFieldKey(i); YID4w7| if(sHeader!=null) c_>f0i { ?R$&Xe!5 if(sHeader.equals("Content-Length")) p'om- { mml
z&h nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x,'!eCKN break; z<5m
fAm } =Qn ;_+Ct } $.bBFWk else 9H%X2#:fH break; h;0S%ZC } VJS8)oI~ } +$Rt+S BD catch(IOException e){e.printStackTrace ();} )(@Hd catch(Exception e){e.printStackTrace ();} 7hcNf, /Ju;MeE9 zL J/5& Utility.log(nFileLength); 1m .W< 3g6j?yYqb Ox@P6|m return nFileLength; ^I+)o1%F } *2GEnAZb7n CoA6 QMZ)-ty" //保存下载信息(文件指针位置) v~Y^r2 private void write_nPos() +[tP_%/r'^ { uyY|v$FM try{ &@3H%DP}Ql output = new DataOutputStream(new FileOutputStream(tmpFile)); |p-t%xDdr output.writeInt(nStartPos.length); C/-63O_ for(int i=0;i<nStartPos.length;i++) vEn4L0D { M4W5f#C5Ee // output.writeLong(nPos); Rx+p. output.writeLong(fileSplitterFetch.nStartPos); k]I0o)+O. output.writeLong(fileSplitterFetch.nEndPos); nb>7UN.9 } ivz{L- output.close(); -(b kr+N } 9rA=pH%<>B catch(IOException e){e.printStackTrace ();} 1u9LdkhnY catch(Exception e){e.printStackTrace ();} p"U,G
-_ } .e3+s* S1?-I_t+] s@7H1)U //读取保存的下载信息(文件指针位置) )sT> i private void read_nPos() /7YF mI/0 { ]H1I,`=@ try{ =3v]gOcO DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); LA)[ip4 int nCount = input.readInt(); %?Ev|:i`@ nStartPos = new long[nCount]; qQH]`#P nEndPos = new long[nCount]; \~_9G{2? for(int i=0;i<nStartPos.length;i++) f@c`8L@g { pt}X>ph{ nStartPos = input.readLong(); wLH] <k nEndPos = input.readLong(); VzKW:St } 10U9ZC input.close(); 0MdDXG-7 } YGsWu7dG catch(IOException e){e.printStackTrace ();} /ID?DtJ catch(Exception e){e.printStackTrace ();} |*0<M(YXN } Ho
*AAg Dmu/RD5X: *~x/=.} private void processErrorCode(int nErrorCode) XSZ k%_ { Ny%(VI5: System.err.println("Error Code : " + nErrorCode); }_68j8` } ~Onoe $A[< ih;]nJ]+- ,1"KHv //停止文件下载 }O4^Cc6 public void siteStop() q')R4=0
K { fP `b>]N_ bStop = true; W!&vul5 for(int i=0;i<nStartPos.length;i++) qC?:*CXH fileSplitterFetch.splitterStop(); b 'pOJS J>bJ
449B 6}oXP_0U } ,9o"43D:a| } dB5b@9* //负责部分文件的抓取 ok4@N @ **FileSplitterFetch.java 1{r)L{] */ }7.PH'.8 package NetFox; ;y2/-tL? }x
wu*Zx B[4KX import java.io.*; >L
0_ dvr import java.net.*; h^o{@/2 E3iW-B8u8 :B:"NyPA public class FileSplitterFetch extends Thread { ^:Gie n= u&uqA* 4zo5}L`Y String sURL; //File URL Q(oN/y3, long nStartPos; //File Snippet Start Position 7[}xP#Z long nEndPos; //File Snippet End Position KPj\-g'A int nThreadID; //Thread's ID =HlQ36;* boolean bDownOver = false; //Downing is over 7fba-7-P boolean bStop = false; //Stop identical w2'f/ FileAccessI fileAccessI = null; //File Access interface e;[F\ov% Pw61_ZZ4B\ ynhmMy% public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException V:c;-)( { 8Bjib&im this.sURL = sURL; c. 2).Jt, this.nStartPos = nStart; ML>[^F this.nEndPos = nEnd; 8!Ww J
Oe nThreadID = id; u[
Yk fileAccessI = new FileAccessI(sName,nStartPos);//定位 '5|h)Q5 } |]X 9Q+'n$s0^ H"dJ6 public void run() k>g_Z`%< { -#HA"7XOE while(nStartPos < nEndPos && !bStop) hs$GN] { Rw:*'1 Y1J=3Y ssN6M./6 try{ ktpaU,% URL url = new URL(sURL); 6'Worj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); E}nH1 httpConnection.setRequestProperty("User-Agent","NetFox"); ^*Yh@4\{JH String sProperty = "bytes="+nStartPos+"-"; ^kB8F"X httpConnection.setRequestProperty("RANGE",sProperty); $H9%J Utility.log(sProperty); J:zU,IIJ Q{5kxw1ZF 3skC$mpJHw InputStream input = httpConnection.getInputStream(); ,~]tg77 //logResponseHead(httpConnection); %s(k_|G+4 "pRtczxOgR S-|)QGxV6 byte[] b = new byte[1024]; ,^ . 88< int nRead; k+ty>bP= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) D,k"PaLP { Y/ .Z.FD` nStartPos += fileAccessI.write(b,0,nRead); RpD=]y!5_ //if(nThreadID == 1) T"DlT/\ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^8AXxE } OD6\Mr2= |* ;B ub\MlSr Utility.log("Thread " + nThreadID + " is over!"); h*u bDownOver = true; tE`u(B, //nPos = fileAccessI.write (b,0,nRead); [c|]f_ZdK } &bfA.&
` catch(Exception e){e.printStackTrace ();} &-B^~M*?? } m4l&
eEp } WL?\5?G9l rcC<Zat,| 2vWx)Drb6 //打印回应的头信息 .Lsavpo public void logResponseHead(HttpURLConnection con) }%_ b$ { \}"$ ?d'f for(int i=1;;i++) 9|gr0~j { 2h1vVF3 String header=con.getHeaderFieldKey(i); t_$2CRG# if(header!=null) "C{}Z //responseHeaders.put(header,httpConnection.getHeaderField(header)); .xm.DRk3 Utility.log(header+" : "+con.getHeaderField(header)); vRHd&0 else xk5@d6Y{r break; HV{wI1 } m0;CH/D0 } P;ci9vk +
|#O@k
c_'OPJ public void splitterStop() \Ani}qQ%| { |m^k_d!d bStop = true; G2Qlt@.T } nwF2aRNV @c;|G$E@3 J:V6 } {_ i\f ]L Kk-S}.E G <i@ 5\# /* iiS-9>]/ **FileAccess.java ]);%wy{Ho *//文件访问(定位,写) Hn%xDJ' package NetFox; (2^gVz=j import java.io.*; 2[O&NdP\Zk /2=#t-p+ %&w3;d;c public class FileAccessI implements Serializable{ e}
P I^bc 06c>$1-? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 OHb[qX\ RandomAccessFile oSavedFile; +RYls|f long nPos; '":lB]hS ]pNvxXbeW 1+jAz`nA:T public FileAccessI() throws IOException qQ?"@>PALD { -y8`yHb_ this("",0); =E.t`x= } d(:8M 4,CXJ2 }dWq=)* public FileAccessI(String sName,long nPos) throws IOException o7sT=x9 { ->y J5smtY oSavedFile = new RandomAccessFile(sName,"rw"); }NzpiY9 this.nPos = nPos; ~M7y*'oY oSavedFile.seek(nPos); LSGBq } GzI yP(U *KV0%)}sbL #xQr<p$L6 public synchronized int write(byte[] b,int nStart,int nLen) p~BRh { R3;Tk^5A int n = -1; CohDO try{ smRE!f*q oSavedFile.write(b,nStart,nLen); clL2k8VS n = nLen; qB0E_y)a } {B?Wu3- catch(IOException e) !'&n-Q { jv%kOovj e.printStackTrace ();
19Mu61 } {=!b/l;@ QLEKsX7p> ktFhc3);! return n; k@f g(}6 } qln3 k` p?);eJtV/ beRVD>T } r&R B9S@*h /H(?
2IHC cDFO; Dr /* %)|9E>fP]N **SiteInfoBean.java 52 fA/sx */ Crho=RJPR package NetFox; %|g>%D3Z? TDFkxB> #LL?IRH9^ public class SiteInfoBean { zF8dKFE~ :Q $K<)[ 7VqM$I private String sSiteURL; //Site's URL /%}*Xh private String sFilePath; //Saved File's Path u09:Z{tL;@ private String sFileName; //Saved File's Name Q<^Tl(`/N? private int nSplitter; //Count of Splited Downloading File nrxo&9[@n `\gnl' E*V`":efS public SiteInfoBean() [E!oQVY {//nSplitter的缺省值为5 aE&,]'6 //default value of nSplitter is 5 m#PY,y this("","","",5); Y^8C)p9r } E.7 e;Ti&o} !`g~F\l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) hyCh9YOu) { ]h* c,. sSiteURL= sURL; (@<lRA
^ sFilePath = sPath; 4)h]MOZ sFileName = sName; )Dw,q~xgg0 this.nSplitter = nSpiltter; 8\^}~s$$A V5sg#|&
FT#8L } u37'~&o{U s+,OxRVw( JJ}0gZ public String getSSiteURL() <>s`\ % { >}`:Ac return sSiteURL; &x[E;P*Fg } }!"A! ~& P&9Gga^I (l-tvk4Ln public void setSSiteURL(String value) M)'HCnvs' { )6,de2Pb sSiteURL = value; yj;sSRT } y .#")IAF dv8>[# U3T#6Rptl public String getSFilePath() cC=[Saatsf { Xu<k3oD7 return sFilePath; f&eK|7J_Yf } WG6FQAo^8 W-x?:X<} \
e\?I9 public void setSFilePath(String value) {QcLu"?c { gVq;m>\|F sFilePath = value; 4L ;% h } WHsgjvh" tBq
nfv pm*xb]8y public String getSFileName() k9:{9wW { y.e^h RKb return sFileName; SB1upTn } @.b+av4J A+::O@_s %_+2@\ public void setSFileName(String value) Mn9dqq~a { C8[&S&<_< sFileName = value; i5Zk_-\#H } :=/85\P0SU i@P)a'W_ <,Ue
0 public int getNSplitter() ?ooe'V@ { wfU7G[ return nSplitter; l>Z5 uSG } .z)%)PVV w[9|cgCY Bg&i63XL$$ public void setNSplitter(int nCount) 0Fk5kGD,&K { :*ing nSplitter = nCount; 0y
7"SiFY } -BRc8 / } xIxn"^' sm0x LZ 5b!vgm#]) /* J8S'/y(LE< **Utility.java fBRo_CU8! */ 4]h
=yc R package NetFox; D2](da:]8) N}pw74=1 [q/Abz'i public class Utility { H<v'^*( rqdE6y+^ cxA ^:3 public Utility() gZLP\_CL { IhA5Wt0j 7![,Q~Fy M,/mE~ } o*DN4oa) r G4';V^q //线程睡眠 MS\>DW public static void sleep(int nSecond) K8>zF/# + { BybW)+~ try{ 85n1eE Thread.sleep(nSecond); D}dn.$ }
tNGp\~ catch(Exception e) |?qquD 4= { }._eIx" e.printStackTrace (); A6:es_ } k"NVV$; } DE%KW:Hug ~-EOjX(X'E //日志 K[ (NTp$E public static void log(String sMsg) <F}_ /q1 { 5Yl<h)1 System.err.println(sMsg); }dp=?AFg } 2.% .Z_k) ^C_#<m_k ppZDGpp public static void log(int sMsg) H
*[_cqnv { IB[)TZ2m System.err.println(sMsg); i'9vL:3 } ~~v3p>z Rr } ?Lyxw] p?B=1vn-2 2Ou[u#H /* gW-V=LV ( **TestMethod.java 'yL%3h
_@ */ Ag&0wN+jTM package NetFox; t^6dzrF =&,]Z6{> +pR[U4$ public class TestMethod { i%/Jp[e\W> LG<J;&41~S J@4 Bf
public TestMethod() xYmxc9)2 { ///xx/weblogic60b2_win.exe Wn(6,MDUN try{ kO|L bQ@=q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); }
\XfH //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `}mcEl SiteFileFetch fileFetch = new SiteFileFetch(bean); f7=((5N fileFetch.start(); NMa}
< } p(~Yx3$* catch(Exception e){e.printStackTrace ();} i(iXD "f "6]y 0URji~?|x } c&AygqN (CsD*U`h qMLD)rL public static void main(String[] args) DV _2P$tT| { .u4
W / new TestMethod(); 7T1=q{#M } -?mfE+kt } Z/t+8;TMR, 点击下载更多相关资料
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