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/* UE8j8U'L **SiteFileFetch.java 'b)qP| */ aKjP{Z0k$ package NetFox; Co>e<be%S import java.io.*; 76H>ST@G| import java.net.*; `6$|d,m5 .DNPL5[v JTIt!E}P public class SiteFileFetch extends Thread { wg%g(FO E75/EQ5p]p \?Sv O SiteInfoBean siteInfoBean = null; //文件信息Bean HS[($ long[] nStartPos; //开始位置 :of(wZa3Q long[] nEndPos; //结束位置 n{u\t+f FileSplitterFetch[] fileSplitterFetch; //子线程对象 sSd/\Ap long nFileLength; //文件长度 jc!m; U t boolean bFirst = true; //是否第一次取文件 Mg#yl\v boolean bStop = false; //停止标志 b7XB l File tmpFile; //文件下载的临时信息 {{jV!8wK DataOutputStream output; //输出到文件的输出流 * xCY^_ >H^#!eaqw //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) NV7k@7_{B public SiteFileFetch(SiteInfoBean bean) throws IOException K+pVRDRcs { `^52IkM) siteInfoBean = bean; Cb1w8l0 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 'IG@JL' tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W:,Wex^9n if(tmpFile.exists ()) M@#T`aS { >))CXGE bFirst = false; XEQTT D< read_nPos(); T]ls&cW5 } fqhL"Ah
else (J[Xryub { Hs*["zFc nStartPos = new long[bean.getNSplitter()]; =e4 r=I nEndPos = new long[bean.getNSplitter()]; 3w</B-|nQ } =hkYQq`Q =}vT>b MC* Hl`C &'SD1m1P } -~mgct5 T1]?E]m{ 0V4B Q:v public void run() |@vkQ
{ =5q<_as //获得文件长度 fes s6=k //分割文件 N7?B"p/ //实例FileSplitterFetch Iko]c_W0 //启动FileSplitterFetch线程 O2?C * //等待子线程返回 d'RvpoM try{ /]_ t-> if(bFirst) unLhI0XW { xWxc1tT` nFileLength = getFileSize(); );$99t if(nFileLength == -1) b6bs . { 2yZr!Rb~* System.err.println("File Length is not known!"); bC/":+s& p } 7uF|Z( else if(nFileLength == -2) CIjc5^Y2 { FQ]/c#J System.err.println("File is not access!"); ;V
xRaj? } i"WYcF| else [={mCGU { U ? +_\ for(int i=0;i<nStartPos.length;i++) !sb r!Qt { \84t\jKR nStartPos = (long)(i*(nFileLength/nStartPos.length));
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6A } ;2p+i/sVj for(int i=0;i<nEndPos.length-1;i++) Yc:%2KZ" { =dmr,WE nEndPos = nStartPos[i+1]; EY,jy]|# }
c0oHE8@ nEndPos[nEndPos.length-1] = nFileLength; ^"WVE[" } eU[g@Pq:Y } 2cR[~\_9. GJ+ ^t ]~({;;3o- //启动子线程 .ZpOYhk fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :DD<0 for(int i=0;i<nStartPos.length;i++) Cn{Hk)6 { \|]mClj# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2 !s&|lI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
`o[l%I\Q nStartPos,nEndPos,i); ,_2-Op Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g.lTNQm$u fileSplitterFetch.start(); B5b:znW2@ } %#HU~X: // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y&/IJst&aq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); L:z0cvn" // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", L, JQ\!c nEndPos = " + nFileLength); Ql*zl // fileSplitterFetch[nPos.length-1].start(); LG #^g6P v pI9TG j[>cv;h
; //等待子线程结束 #Y'eS'lv4 //int count = 0; O$Rz/& //是否结束while循环 -@orIwA& boolean breakWhile = false; T$4{fhV
\ 8y;Rw#Dz 1U 6B$(V^i while(!bStop) C|'DKT4M& { nbi7rcT write_nPos(); ).T&fa" Utility.sleep(500); %opBJ breakWhile = true; Y
G+|r ]%Q!%uTh S@qp_! for(int i=0;i<nStartPos.length;i++) &V"oJ}M/a { O9=/\Kc if(!fileSplitterFetch.bDownOver) 6Rc=!_v^ { s|[>@~gXk breakWhile = false; 1!#85SMx break; K/Q"Z* } .tBlGMcN } -yqsJGY if(breakWhile) Fn4v/)*H break; |3H+b,M5 7Cgi& s#2t\}/ //count++; Oy6fl'FIt //if(count>4) @MW@mP)# // siteStop(); +y7z>Fwl } &C 9hT =ily=j"hK ^t>mdxuq System.err.println("文件下载结束!"); 2
$>DX\h } la!]Y-s)'4 catch(Exception e){e.printStackTrace ();} SZyk G[ } 7& M-^Ev |Uh8b % .@1+}0 //获得文件长度 .`or^`X3 public long getFileSize() ,75) { Q*ITs!~Z int nFileLength = -1; mScv7S~/s try{ N&9o 1_} URL url = new URL(siteInfoBean.getSSiteURL()); _Q V=3UWP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]#!uke Q httpConnection.setRequestProperty("User-Agent","NetFox"); @]\fO)\f nt.LiM/L @W,jy$U int responseCode=httpConnection.getResponseCode(); %mI0*YRma if(responseCode>=400) %sa?/pjK { UwN Vvo processErrorCode(responseCode); 6FS%9.Ws return -2; //-2 represent access is error xR7ZqTcw } 7qKz_O 1wSAwpz A5l Cc
b String sHeader; &@=Jm
/5 %6K7uvTq AFLtgoXn: for(int i=1;;i++) TnW`#.f { Vk5Z[w a //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); n#_B4UqW% //Utility.log(in.readLine()); n@p]v* sHeader=httpConnection.getHeaderFieldKey(i); mz?<t/$U if(sHeader!=null) `/|
*u { =H95?\}T[ if(sHeader.equals("Content-Length")) oO}g~<fYG { [8V;Q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Mz+I
YP`L break; ,@$5,rNf } VQ= } B|`?hw@g+ else z/?* h break; UmKE]1Yw4r } IsXNAYj } so))J`ca) catch(IOException e){e.printStackTrace ();} D%>Bj>xQD catch(Exception e){e.printStackTrace ();} `kKssU< 1(' wg! MGdzrcF Utility.log(nFileLength); sG g458 f \&X$g q~`hn(S return nFileLength; %0\@\fC41 } F`=p/IAJK d<c 29Y ,GOIg|51 //保存下载信息(文件指针位置) .G/Rh92 private void write_nPos() EKc<|e,F { <H64L*,5'7 try{ QE 4 output = new DataOutputStream(new FileOutputStream(tmpFile)); XQ1]F{?/H output.writeInt(nStartPos.length); FgdnX2s J for(int i=0;i<nStartPos.length;i++) /R&`]9].s { n6Oz[7M // output.writeLong(nPos); u%-]-:c output.writeLong(fileSplitterFetch.nStartPos); =By@%ioIGG output.writeLong(fileSplitterFetch.nEndPos); |# 0'_ } HDm]njF%qQ output.close(); Mo/R+\u+Y } 9.)z]Gav catch(IOException e){e.printStackTrace ();} 2EgvS!" catch(Exception e){e.printStackTrace ();} -TD\?Q } }L0
[Jo: (bm^R-SbB MqJTRBs% //读取保存的下载信息(文件指针位置) EBh dP private void read_nPos() # epP~J_f { l|q-kRRjn try{ xMbgBx4+ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .!1[I{KU int nCount = input.readInt(); 3f=ZNJ> nStartPos = new long[nCount]; sY<UJlDKT nEndPos = new long[nCount]; r8"2C# for(int i=0;i<nStartPos.length;i++) =gF035 { 6R :hs C$ nStartPos = input.readLong(); w!lk&7Q7Z nEndPos = input.readLong(); zJXK:/ } 2poo@]M/ input.close(); }u#3 hYa } Jp jHbG catch(IOException e){e.printStackTrace ();} L|1,/h
8p catch(Exception e){e.printStackTrace ();} ,#;hI{E } MkW=sD_ V 7,dx@J- Gf8 ^nfr private void processErrorCode(int nErrorCode) 2:
QT`e& { MKbcJZe System.err.println("Error Code : " + nErrorCode); \.2i?<BC } &JX<)JEB=< X~IilGL8: zk<V0NJIL* //停止文件下载 -!!]1\S*Y public void siteStop() [4?r0vO { ~d7t\S bStop = true; 2l?^\9& for(int i=0;i<nStartPos.length;i++) DE.].FD' fileSplitterFetch.splitterStop(); R;HE{q[ f v4e4,Nt Z9: } -k + jMH } ;gBR~W //负责部分文件的抓取 &G2&OFAr]q **FileSplitterFetch.java 4eWv). */ gWgp:;Me package NetFox; a&{Y~Og?% ZH~bY2^; BP..p ^EPN import java.io.*; 75a3hPCZ import java.net.*; x[mz`0 h: yJ aV5M}:D public class FileSplitterFetch extends Thread { s[GHDQ;! ?Uq"zq bci]"uzB
String sURL; //File URL B*_K}5UO long nStartPos; //File Snippet Start Position np2&W'C/i long nEndPos; //File Snippet End Position N3$1f$` int nThreadID; //Thread's ID
Gd A!8 boolean bDownOver = false; //Downing is over WVD48}HF- boolean bStop = false; //Stop identical XQ~Xls%]
FileAccessI fileAccessI = null; //File Access interface W=HvMD \k5"&]I3 {9(0s| pr public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -ED}
6E { ypEMx'p this.sURL = sURL; k.C&6*l!5; this.nStartPos = nStart; }E ]l4N2 this.nEndPos = nEnd; #b/L~Bw[ nThreadID = id; U[MeK)* fileAccessI = new FileAccessI(sName,nStartPos);//定位 xO_>%F^? } HW]?%9a rf H1Zl (zFqb,P public void run() Mf14> `<` { wU|@fm" while(nStartPos < nEndPos && !bStop) #czTX%+9(e { A|LO!P,w 3Ewdu O?g;Ny try{ tAq0Z) URL url = new URL(sURL); gy@=)R/~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0g30nr) httpConnection.setRequestProperty("User-Agent","NetFox"); f I=G>[ String sProperty = "bytes="+nStartPos+"-"; dwk%!% httpConnection.setRequestProperty("RANGE",sProperty); tC|?Kl7 Utility.log(sProperty); i.'"`pn_ U',C-56z msxt'-$M InputStream input = httpConnection.getInputStream(); d4ecF%R //logResponseHead(httpConnection); w:lj4Z_ A:Wr5`FJ _cvX$(Sg byte[] b = new byte[1024]; <Q(E {c3" int nRead; Q>D//_TF while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >SQzE { "a].v 8l! nStartPos += fileAccessI.write(b,0,nRead); N
;=zo-8 //if(nThreadID == 1) Y_Fn)( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6 eryf? } PwW$=M{\. Xk.OyQ@ K ,NmDc^ Utility.log("Thread " + nThreadID + " is over!"); =s!0EwDH3 bDownOver = true; Mv%Qze,\V^ //nPos = fileAccessI.write (b,0,nRead); zc8^#D2y& } vYm-$KQ"o catch(Exception e){e.printStackTrace ();} fD@d.8nXd } Xr=BxBttp } N `:MF 9 Yw#fQFm 9vP;i= fr //打印回应的头信息 7)QZ<fme public void logResponseHead(HttpURLConnection con) Xuu&`U~% { 8OZasf for(int i=1;;i++) =q0V%h{ { ( 0/M?YQF String header=con.getHeaderFieldKey(i);
i=\)[;U if(header!=null) QTBc_Z //responseHeaders.put(header,httpConnection.getHeaderField(header)); VOD-<
"| Utility.log(header+" : "+con.getHeaderField(header)); Awa| (] else nBp6uNK[ break; rwJU;wy } l,l qhq\ } \{`^Q+<
O6NH w^Y/J4 I0 public void splitterStop() <L8|Wz { EtzSaB*| bStop = true; Xgd-^ } -_n Qn VIdKe&, msgR"T3' } o3hgkoF ;Tr,BfV|Bf 5e.aTW;U /* l#enbQ`-~ **FileAccess.java peu9Bgs *//文件访问(定位,写) />mK.FT package NetFox; "'bl)^+?, import java.io.*;
YA,~qT| lND2Kb m[xl)/e public class FileAccessI implements Serializable{ jbipNgxkr vN^.MR+< //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V3ht:>c9qs RandomAccessFile oSavedFile; 1v|-+p42 long nPos; VA[EY`8 Hc'Pp{| X yn}Dj9(q public FileAccessI() throws IOException mq[=,,# { &PE%tm this("",0); P9yMf~ } j yD3Sa3 I+H~ 5zq. _cQ
'3@ public FileAccessI(String sName,long nPos) throws IOException pZ'q_Oux { 0]bt}rh oSavedFile = new RandomAccessFile(sName,"rw"); exJc[G&t( this.nPos = nPos; ^'E^*R oSavedFile.seek(nPos); 't`h?VvL } }qM^J;uy '(@q"`n s0dP3tz> public synchronized int write(byte[] b,int nStart,int nLen) E#+2)Q { nSyLt6zn\ int n = -1; Mc.{I"c@ try{ r{v3XD/ oSavedFile.write(b,nStart,nLen); N_NN0 n = nLen; %3qjgyLZ| } r%f Q$q> catch(IOException e) Lbrl CB+ { /al56n e.printStackTrace (); x9>$197 } cxs@ph&Wk 0RA#Y(IR ;/$pxD return n; Y"bm4&' } g7]S 0a89<yX y\^zxG*]' } 8%CznAO"?W Ag9GYm n{!{,s /* k_]'?f7Z **SiteInfoBean.java ):PN0.H8 */ 6"G(Iq'2t3 package NetFox; &*OwoTgk+ HjA~3l7 M,JwoKyg public class SiteInfoBean { K*j
OrQf` A^,ul>! HDKF>S_S private String sSiteURL; //Site's URL RL4|!HzR private String sFilePath; //Saved File's Path J.XkdGQ private String sFileName; //Saved File's Name 2?%*UxcO private int nSplitter; //Count of Splited Downloading File HE+' fQ!R t#P7'9Se8 {2 q"9Ox" public SiteInfoBean() &'12,'8 {//nSplitter的缺省值为5 Zuzwc [Z1 //default value of nSplitter is 5 L;:PeYPL this("","","",5);
+!u9_?Tp } 1sg:8AA uB"B{:Kz IrYj#,xJ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) q0%QMut% { bJMsB|r sSiteURL= sURL; t }4 sFilePath = sPath; b)IQa,enH sFileName = sName; $MDmY4\ this.nSplitter = nSpiltter; GCYXDovh |e#W;q$v eMdP4<u } Os[z>H? <UO[*_,\ ^E/6vG public String getSSiteURL() OH>Gc-V { vUbgSI return sSiteURL; SN"Y@y)= } Mo3%OR [gUD + rOLZiE T public void setSSiteURL(String value) vW.f`J,\D' { JG^GEJ sSiteURL = value; 3.dSS } F6~
;f; h(kPf]0 wclj9&k public String getSFilePath() k+[oYd { r
ts2Jk7f return sFilePath; <=|^\r
!}& } 1:<n(?5JI p}==aNZK "a;$uW@.6 public void setSFilePath(String value) 7@ONCG { j9c:SP5 sFilePath = value; q<.k:v& } \h[*oeh RU/WI<O =g6~2p=H public String getSFileName() yD\Kn{ { &^&0,g?To return sFileName; ?i0u)<H } eptw)S-j XC<'m{^(m \'g7oV;>cI public void setSFileName(String value) wG:RvgX} { <z60EvHg sFileName = value; 7>zUT0SS } [H!do$[> @P0rNO%y 5/6Jq public int getNSplitter() N4qBCBr( { jXmY8||w return nSplitter; r-S%gG}~E } v"
#8^q 4#W$5_Ny L}Sb0 o. public void setNSplitter(int nCount) )/!HI0TU { hyPS 6Y'1 nSplitter = nCount; ^3vI
NF } a"4X7
D+ } 21<Sfsc$ C+!=C{@7di Y[b08{/ /* xv>8rW(Np5 **Utility.java 9`qw,X&AK_ */ #(}{*dR package NetFox; FDF DB x/]G"?Uix 6E^m*la% public class Utility { (oCpQDab@ 8rJf2zL ORX<ZOt1 public Utility() o4a@{nt^, { !+Cc^{ TG?>;It& R'F \9eyA } -{A64gfFxT Xeja\5zB //线程睡眠 zGd[sjL public static void sleep(int nSecond) !RLXB$@` { |jH Yf42Q try{ EN^L.q9# Thread.sleep(nSecond); Z
*tHZ7b } +Y+fM catch(Exception e) YJwI@E(l$ { .j)DE}[q> e.printStackTrace (); Ao\ OU} } 2b\h@VJt } ,3GB9 oKkDG|IE //日志 wE9z@\z] public static void log(String sMsg) R'_F9\ { 8rBa}v9 System.err.println(sMsg); &-IkM%_A9 } S_AN.8T rx#GrV*y phA{jJy? public static void log(int sMsg)
OS(Ua { w?fq%-6f* System.err.println(sMsg); R%t6sbsNv } R SWw4} } YuO!Y9iEm Cvt/ot-J? g("[wqgG /* b,ZBol|X **TestMethod.java FFVh~em{ */ Xa'b@*o& package NetFox; &F0>V o P
2x.rukT| xOxyz6B\ public class TestMethod { +:C.G[+ MnY}U",
Y,4?>:39J public TestMethod() K.? S,qg { ///xx/weblogic60b2_win.exe %gqu7}' try{ Ql}#mC.>/ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5@bmm] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); d_V7w4lK SiteFileFetch fileFetch = new SiteFileFetch(bean); v~dUH0P<>e fileFetch.start(); F CfU=4O } W-1Ub |8C catch(Exception e){e.printStackTrace ();} 9-=kVmT&g
|M?VmG/6 maQDD* } rc{F17~vX oB!-JX9 bM
W}.v! public static void main(String[] args) *$t =Lh { 7W/55ZTmJ new TestMethod(); 1OK~*=/4 } ^!(tc=sr } Q;z'"P 点击下载更多相关资料
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