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/* yN9k-IPI **SiteFileFetch.java i/ED_<_Vg */ 0GUm~zi1 package NetFox; s@USJ4# import java.io.*; @Q!Jzw#B import java.net.*; k[TVu5R =oN(1k^ 2K^D%U public class SiteFileFetch extends Thread { sVk+E'q W[pOLc- I
r8,= SiteInfoBean siteInfoBean = null; //文件信息Bean .hBq1p
long[] nStartPos; //开始位置 G?:{9. ( long[] nEndPos; //结束位置 pkW }\r FileSplitterFetch[] fileSplitterFetch; //子线程对象 NSQ}:m long nFileLength; //文件长度 \Wdl1 =` boolean bFirst = true; //是否第一次取文件 |Z]KF>S] boolean bStop = false; //停止标志 l;*/F`>c File tmpFile; //文件下载的临时信息 xvP=i/SO DataOutputStream output; //输出到文件的输出流
]/l" Q5[x2 s_ d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) :O`7kZ]=n public SiteFileFetch(SiteInfoBean bean) throws IOException ~d0:>8zQR { 4*k>M+o/C4 siteInfoBean = bean; +iS'$2)@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); AYhWeI+ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); |u r/6{Oj1 if(tmpFile.exists ()) bW"bkA80 { Wo&WO
e bFirst = false; 2nNBX2o&_ read_nPos(); 8*nv+ } jZjWz1+ else o!R.QI^2VT { ,g69 ?w nStartPos = new long[bean.getNSplitter()]; B3x 4sKs nEndPos = new long[bean.getNSplitter()]; t=,ZR}M1` } b3/@$x< #@ClhpLD ~q5aMy d< UQ0Sfu } u/wWP4'$J@ Hrjry$t/J &cZQ,o public void run() ,;3bPjey { QO1pwrX< //获得文件长度 2TFb!?/RQ //分割文件 #&V7CYJ //实例FileSplitterFetch '}4z=f`} //启动FileSplitterFetch线程 mS\gh)<h //等待子线程返回 LtIR)EtB] try{ D4@).% if(bFirst) r 6.`9 { CbvP1*1 nFileLength = getFileSize(); [Lck55V+Q if(nFileLength == -1) xq6
eu
9 { &a;{ed1B System.err.println("File Length is not known!"); !,Ou:E?Bb } ~]sj.>P else if(nFileLength == -2) nt 9LBea { )b%t4~7 System.err.println("File is not access!"); Lud[.>i } f ZEyXb else _xKIp>A { 7+N0$0w%r for(int i=0;i<nStartPos.length;i++) U46qpb7 { 2 m"2>gX nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;mT|0&o># } *B4?(&0 for(int i=0;i<nEndPos.length-1;i++) 'E\/H17 { [Rj_p&'
nEndPos = nStartPos[i+1]; ^sF/-/ {?U } {GH0>
1& nEndPos[nEndPos.length-1] = nFileLength; 1K*`i( } :EGvI } #mIgk'kW< Yvi.l6JL O{vVW9Q //启动子线程 JXx[e fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Mb!b0
for(int i=0;i<nStartPos.length;i++) OLH[F { W
u C2LM fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), OO?;?? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1>c^-"#e^ nStartPos,nEndPos,i); RJ\'"XQ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #&k`-@b5| fileSplitterFetch.start(); 539fB, } ;\'d9C // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7@W}>gnf siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); w@![rH6~F
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `4SwdW n nEndPos = " + nFileLength); n 3eLIA{ // fileSplitterFetch[nPos.length-1].start(); ~=P#7l\o1 mm
dQ\\ WMw|lV r //等待子线程结束 >P9|?:c //int count = 0; 9ZD>_a //是否结束while循环 (DIMt-wz boolean breakWhile = false; whW%c8 ts:YJAu+F Jkx_5kk/\ while(!bStop) r"_U-w { ^ g'P
H{68 write_nPos(); |j2$G~B6 Utility.sleep(500); 7DZZdH$Fm breakWhile = true; *Cj<Vy g1H$wU3eu APJVD- for(int i=0;i<nStartPos.length;i++) v:IpZ;^ { iW?z2%# if(!fileSplitterFetch.bDownOver) qg06*$% { )KdEl9 o breakWhile = false; al{}_1XoU break; ?3_^SRW&a } RM3"8J } mgd)wZNV if(breakWhile) !'z"V_x~ break; _'mK=`>u EXbaijHQG R:5uZAx //count++; 1F'x$~ZI //if(count>4) q/h, jM // siteStop(); s~NJy'Y } ?mp}_x#= #rI4\K )p`zN=t System.err.println("文件下载结束!"); `C&@6{L } PL|ea~/ catch(Exception e){e.printStackTrace ();} {9XN\v=$"* } ?APCDZ^ X()yhe_ 4T>d%Tt+) //获得文件长度 [BTOs4f public long getFileSize() "Ng%"Nz { 3P *[!KI int nFileLength = -1;
|W\U9n try{ v.6K;TY. URL url = new URL(siteInfoBean.getSSiteURL()); 3Viz0I<% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rqWD#FB=z httpConnection.setRequestProperty("User-Agent","NetFox"); e9;5.m >c@jl Tr.u'b( int responseCode=httpConnection.getResponseCode(); %BwvA_T'Q if(responseCode>=400) M,vCAZ { WkMB processErrorCode(responseCode); P_.zp5> return -2; //-2 represent access is error {O!B8a
} 4*&2D-8<K 3rj7]:Vr 7Tc^}Q String sHeader; u#+Is4Vh "=Cjm`9~j zXW)v/
ZD
for(int i=1;;i++) &a'mh { a|-ozBFR //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1wy?<B.f //Utility.log(in.readLine()); {Rz(0oD\ sHeader=httpConnection.getHeaderFieldKey(i); RZ0+Uu/J if(sHeader!=null) YS bS.tq { A~@x8 if(sHeader.equals("Content-Length")) ^@
Xzh: { `PtfPt<{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Xd@ d$ break; v[4-?7- } /^9=2~b } ,: Ij@u>) else 6Zx)L|B break; )@],0yL } f<;eNN } >{{0odBF catch(IOException e){e.printStackTrace ();} !8I80:e_~ catch(Exception e){e.printStackTrace ();} Hyb_>n fp?/Dg"49. R9-Uoc/ Utility.log(nFileLength); }_oQg_-7e 5i-VnG
.|i/
a%J return nFileLength; ig ^x%!; } r8Z.}<j UmL Boy&* EvptGM //保存下载信息(文件指针位置) :j`4nXm private void write_nPos() kA/yL]m^S { :{ Lihe~\ try{ moCR64n output = new DataOutputStream(new FileOutputStream(tmpFile)); Eih6?Lpu output.writeInt(nStartPos.length); 0D/7X9xg9+ for(int i=0;i<nStartPos.length;i++) g~XR#vl$ { |qf ef& // output.writeLong(nPos); GK[9Cm"v output.writeLong(fileSplitterFetch.nStartPos); pHKc9VC output.writeLong(fileSplitterFetch.nEndPos); hm0MO,i" } ~{ucr#]C output.close(); C$d b)5- } 1 fTf+P catch(IOException e){e.printStackTrace ();} 1cS*T>` catch(Exception e){e.printStackTrace ();} };g<|v*o } G5NAwpZf ujr"_ofI $lg{J$
h8 //读取保存的下载信息(文件指针位置) ))6YOc private void read_nPos() ?>NX}~2cf { N_E)f try{ T%yGSk DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L]E.TvM1* int nCount = input.readInt(); oxug
nStartPos = new long[nCount]; j9R+;u/! nEndPos = new long[nCount]; 24k;.o for(int i=0;i<nStartPos.length;i++) deOk>v&U { 3F$N@K~s nStartPos = input.readLong(); M%OUkcWCk nEndPos = input.readLong(); ZyV^d3F@$ } 13A~."b input.close(); Z fd `Fu } XrJLlH>R4 catch(IOException e){e.printStackTrace ();} )3ZkKv;zY catch(Exception e){e.printStackTrace ();} a28`)17z } U2
Cmf QTU$mC] !`dMTW private void processErrorCode(int nErrorCode) I7+yu> { |?v+8QL,;t System.err.println("Error Code : " + nErrorCode); Oo/@A_JO@ } Y+gNi_dE drJUfsxV usw(]CnH //停止文件下载 !O4)YM public void siteStop() TiKfIv { LC qWL1 bStop = true; cvC 7#i[G for(int i=0;i<nStartPos.length;i++) esd9N'.Q* fileSplitterFetch.splitterStop(); _opB,,G $49;\pBZl 7
b{y } XdE|7=+s } \CBL[X5tr //负责部分文件的抓取 S<g~VK!Tt **FileSplitterFetch.java P&Wf.qr{: */ J
IE0O` package NetFox; 'jYKfq~_cJ nq\~`vH|Gd xu@+b~C\ import java.io.*; vBV_aB1{ import java.net.*; MC1&X' @DKph!cr @&GY5<&b public class FileSplitterFetch extends Thread { #e[igxwi Jm 1n|f HMw}pp: String sURL; //File URL gRwRhA/ long nStartPos; //File Snippet Start Position lr=quWDY long nEndPos; //File Snippet End Position Y8/&1s_ int nThreadID; //Thread's ID u6
4{w, boolean bDownOver = false; //Downing is over p+CK+m
boolean bStop = false; //Stop identical P}vk5o' FileAccessI fileAccessI = null; //File Access interface Ki(0s IO"q4(&;P4 yY!@FGsA public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ZeH=]G4Zv7 { ^2nH6,LPS this.sURL = sURL; @Py?.H this.nStartPos = nStart; juMHc$d17 this.nEndPos = nEnd; "5"{~3Gw^ nThreadID = id; %F(lq*8X fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?>mpUH } 4+Y9":< SKo*8r o[g]Va*8 public void run() ue -a/a { ,#hNHFa'JH while(nStartPos < nEndPos && !bStop) )!5"\eys { HG3iK D 1(9/;9 *LQt=~ try{ G%T<wKD< URL url = new URL(sURL); gH0Rd
WX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _8wT4|z5 httpConnection.setRequestProperty("User-Agent","NetFox"); EE*FvI` String sProperty = "bytes="+nStartPos+"-"; X3l6b+p httpConnection.setRequestProperty("RANGE",sProperty); rfOrh^ Utility.log(sProperty); <<&SyP cUwR6I9 {<Xl57w-Q InputStream input = httpConnection.getInputStream(); R.rE+gxO1 //logResponseHead(httpConnection); @4>?Y=# )jMk~;'r Zig3WiD& byte[] b = new byte[1024]; V5+|H1= int nRead; 9L>ep&u)^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) LG=_>:~t> { !X1
KOG nStartPos += fileAccessI.write(b,0,nRead); |%j7Es //if(nThreadID == 1) Nk?L<' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F ZN}T{< } 5G=fJAG ZBjb f_M: E#\'$@8j Utility.log("Thread " + nThreadID + " is over!"); NYPjN9L bDownOver = true; E :UJ"6 //nPos = fileAccessI.write (b,0,nRead); j:0<
tjE } ~(eD 4" catch(Exception e){e.printStackTrace ();} `)M&^Z=D } ]E1|^[y } -uB*E1|Q ES5a`"H C+0BV~7J<< //打印回应的头信息 c public void logResponseHead(HttpURLConnection con) 1t7T\~+F { q]v{o8:U for(int i=1;;i++) 2 '8I/>- { Sv[+~co<l String header=con.getHeaderFieldKey(i); Xliw(B'\a4 if(header!=null) u9{Z*w3L7 //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2Iq*7n:v0 Utility.log(header+" : "+con.getHeaderField(header)); 6t4{aa!L|9 else }KV)F,` break; `LJ.NY pP } !~]'&9 } _
Uv3glK ^NrC8,p F "-GhjK public void splitterStop() ($[@'?Z1 { _:G>bU/^ bStop = true; Yz>8 Nn '_ } 7qg. :h 6g"qwWZp <4*)J9V^s= } dbfI!4 Cp#}x1{ PBAQ
KQ /* E\VKlu4 **FileAccess.java .WlZT- *//文件访问(定位,写) |qb-iXW= package NetFox; D/tFN+|P import java.io.*; r,ep{
p 2&:nHZ) _+qtH< F/ public class FileAccessI implements Serializable{ UL3u2g;d e_llW(*l8^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #G("Oh RandomAccessFile oSavedFile; jC'Diu4|Q long nPos; 5,du2 vH{JLN2 V4|l7 public FileAccessI() throws IOException IKnXtydeI} { qhNYQ/uS this("",0); /z4n?&tM } 8[u$CTl7a SOvo%L@ UeaHH]U public FileAccessI(String sName,long nPos) throws IOException _%<qZT { ~.Cu,>fV oSavedFile = new RandomAccessFile(sName,"rw"); -7m7.>/M this.nPos = nPos; xUDXg* oSavedFile.seek(nPos); G V% @A } y{QF#&lW }?Tz=hP A )xfO- public synchronized int write(byte[] b,int nStart,int nLen) Uy$?B"Z { 0lpUn74F int n = -1; {Lvta4}7( try{ Xl/2-'4 oSavedFile.write(b,nStart,nLen); Kk/cI6`W n = nLen; 't3nh } <s5s<q2 catch(IOException e) h\*I*I8C { zG~nRt{4 e.printStackTrace (); $ !:xjb } k#<Y2FJa CK1gzIg> /XwwB return n; nY_+V{F } >\>!Q V1@ k
E-+#p RGLi#:0_.x } c4L++
u# {(^%2dk83C |3 v+&eVi /* 3NgyF[c **SiteInfoBean.java 3!u:*ibt */ +JY]J89 package NetFox; xBAASy e",0Er FT x$24Nc1a' public class SiteInfoBean { vkW]?::Cfd VY "i>Ae 79>_aD9 private String sSiteURL; //Site's URL CM+/.y T private String sFilePath; //Saved File's Path W.
p'T}2 private String sFileName; //Saved File's Name L_}F.nbS5 private int nSplitter; //Count of Splited Downloading File 7)y
+QU] .0]Odf:@ 1)ZdkTF@H public SiteInfoBean() jLreN#:9 {//nSplitter的缺省值为5 PA>su)N$ //default value of nSplitter is 5 1'9YY")# this("","","",5); 4z!(!J) } q@Sj$ yx/.4DW1Ua 2R`}}4<Z public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Iqb|.v LG { iPt{v5}] sSiteURL= sURL; 4$8\IJ7G sFilePath = sPath; S{c;n*xf sFileName = sName; 0vcM+ }rw this.nSplitter = nSpiltter; 3H@29TrJ+ e"v oXe 6#1:2ZHKG } jW_FaPW(p `rI[ XnV$}T:?X public String getSSiteURL() 3ypf_]< { firiYL"=44 return sSiteURL; B e2yS]U } BI0 A0 Qb&gKQtt@ F[==vte| public void setSSiteURL(String value) RTv zS] { oH kjMqju sSiteURL = value; qn~:B7f } 5`[B:<E4 w1
tg7^(@ Q)}z$h55 public String getSFilePath() 5tl uS { HDT-f9%}<4 return sFilePath; D^\2a;[AxA } 2V =bE- "3:TrM$|A
$7bux1L public void setSFilePath(String value) glP
W9q,f { pt-
1>Ui sFilePath = value; +@5*_n\e` } y7Sj^muBY m6M:l"u Zywx.@! public String getSFileName() ]eIV'lP,j/ { ~3s\Q%
return sFileName; =hB0p^a } 7NDjXcuq 8S7 YVsDz" ouR(l; public void setSFileName(String value) gPg2Ve0Qy { nW`EBs sFileName = value; TGu]6NzyZ } <Z8^.t)| #[ch?K {aq}Q|?/ public int getNSplitter() g\foBK:GE { k;?E,!{ return nSplitter; L64cCP* } ~TfQuIvQB \h 1 T/_4 lT~A~O public void setNSplitter(int nCount) ;OfZEy>7 { wQ/Z: nSplitter = nCount; 088"7 s } u3@v }
e&J_uG qI#ow_lL# uV+.(sjH /* %t<ba[9F **Utility.java UV8K$n< */ W05>\Rl package NetFox; &[|P/gj#> 5 ]v]^Y'? ;m cu(J public class Utility { hz~jyH.h_ g?d*cwtU zCdzxb_h" public Utility() >gLLr1L\ { f6zS_y9gn JW-!m8 5D%gDw+" } A%c)=(, qmM%MPv //线程睡眠 wx%TQ! public static void sleep(int nSecond) -C<Ni { bem-T`>' try{ "[BDa}Il Thread.sleep(nSecond); ,3E9H&@j } XT0:$0F catch(Exception e) Ar VNynQ { 8}(ul e.printStackTrace (); $(U}#[Vie
} 7f\@3r } A T'P=)F@ zm('\KvT //日志 K?:wX(JYT public static void log(String sMsg) F_&bE@k { 0[T>UEI? System.err.println(sMsg); WbP*kV{ } nfbq J c/\$AJV.H #\)tz z public static void log(int sMsg) yL>wCD,L { t=Um@;wh System.err.println(sMsg); ,t=12R]> } ,dO$R.h } )mb RG9P XU19+mW=P J%n{R60b /* SS/t8Y4W **TestMethod.java SJdi*> */ r9d dVD package NetFox; t@O4!mFH 9M$N>[og f8'$Mn, public class TestMethod { O#5ll2? , JUP p* public TestMethod() Y!tjaL 9D { ///xx/weblogic60b2_win.exe >&3ATH;&( try{ OK^0,0kS3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); N2x!RYW //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Vt!<.8&` SiteFileFetch fileFetch = new SiteFileFetch(bean); _noQk3N fileFetch.start(); \"u3x.! } f!"Y"g:@E catch(Exception e){e.printStackTrace ();} Ft)Z'&L
_%$(D"^j
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C } 0fd\R_"d. U~w g' MN22#G4j^w public static void main(String[] args) m*^|9*dIC { 4JD 8w3u/ new TestMethod(); GqrOj++> } A|esVUo<3^ } 9IRvbE~2 点击下载更多相关资料
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