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/* u!Bk,}CE` **SiteFileFetch.java R hio7C */ U:n*<l-k} package NetFox; EkZjO Ci import java.io.*; K]<u8eF import java.net.*; b[srG6{ & k 4B_W B{aU;{1 public class SiteFileFetch extends Thread { W-XpJ\_ ffk4mhH wyw <jH SiteInfoBean siteInfoBean = null; //文件信息Bean iyj3QLqE long[] nStartPos; //开始位置 r6t&E%b long[] nEndPos; //结束位置 nY0sb8lZJ FileSplitterFetch[] fileSplitterFetch; //子线程对象 }0;Sk(B> long nFileLength; //文件长度 C[8Kl D boolean bFirst = true; //是否第一次取文件 )6{P8k4Zr boolean bStop = false; //停止标志 1lcnRHO File tmpFile; //文件下载的临时信息 lKWr=k~ DataOutputStream output; //输出到文件的输出流 _|<BF $<OhGk- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ug#<LO-.Rd public SiteFileFetch(SiteInfoBean bean) throws IOException 2-mQt_
i { /^2CGcT( siteInfoBean = bean; E[?kGR[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); nxQ}&n tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); T3z(k
la if(tmpFile.exists ()) ET-Vm >] { _-%d9@x bFirst = false; M|r8KW~S) read_nPos(); sRq U]i8l } Pp*}R2 else Ae49n4J { I4ilR$jg nStartPos = new long[bean.getNSplitter()]; 3cC }'j nEndPos = new long[bean.getNSplitter()]; 1[DS'S } UX_I6_& zfjw;sUX 3LW[H+k >a=d; } U$'y_}V C[YnrI! <HQ&-j x public void run() T//S, { Df@/cT //获得文件长度 e{C6by"j{S //分割文件 yvxl_*Ds8 //实例FileSplitterFetch ^>m^\MuZ //启动FileSplitterFetch线程 V;93).-$ //等待子线程返回 r)b<{u=] try{ {?i)K X^ if(bFirst) a)S7}0|R { C) .2gQ
G nFileLength = getFileSize(); O
>FO> if(nFileLength == -1) Km*<Kfcz { RH1uVdJ1 System.err.println("File Length is not known!"); 7Fl-(Nv` } "H1:0p else if(nFileLength == -2) Ei~f`{i { QlD6i-a System.err.println("File is not access!"); 7lU.Nit } ow.j+<M else 8i:[:Z { D$nK`r for(int i=0;i<nStartPos.length;i++) &p"(- { 3hS6jS nStartPos = (long)(i*(nFileLength/nStartPos.length)); l h/&__ } 9+Nw/eszO for(int i=0;i<nEndPos.length-1;i++) irMd
jG { %MJ;Q?KB nEndPos = nStartPos[i+1]; c_1/W{ } mP-2s;q nEndPos[nEndPos.length-1] = nFileLength; s, XM9h>P4 } wFL3&* } 84M3c 70Ka! 3ATjsOL //启动子线程 `|<+ ? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >&Fa(o;* for(int i=0;i<nStartPos.length;i++) NHiq^ojk { m mw-a0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6c<ezEJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q6^x8 nStartPos,nEndPos,i); 6fwY$K\X Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >n!ni( fileSplitterFetch.start(); ~HDdO3 } Np)aS[9W // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7& 6Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _/ Os^ >R // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %EI<@Ps8c nEndPos = " + nFileLength); DU{bonR` // fileSplitterFetch[nPos.length-1].start(); @
yxt($G ZnXejpj)D N[k<@Q?*a //等待子线程结束 vv/J 5#^,\ //int count = 0; 7co`Zw4}g //是否结束while循环 d^84jf.U boolean breakWhile = false; <k]qH-v4 8(xw?|D7 i2`0|8mw' while(!bStop) >o[|"oLO { L2|aHI1'l write_nPos(); U:lv^QPG Utility.sleep(500); }*kJ-q&0 breakWhile = true; _V@P-Ye #WufZ18# qY(:8yC36 for(int i=0;i<nStartPos.length;i++) T9)wj][ . { X\sm[_I if(!fileSplitterFetch.bDownOver) g%\L&}Jd { qm(1:iK,0 breakWhile = false; HDS"F.l5 break; \*"`L3 } xl]
;*& } =B(mIx;m if(breakWhile) ?~F. / break; 9L)L|4A.l fp&Got!pB h~miP7,c<u //count++; gfo}I2" //if(count>4) 'sU)|W(3U // siteStop(); )5yj/0oT } 4}yE+dRUK: G)7)]yBL =!
mJG System.err.println("文件下载结束!"); vA-PR& } 3] 76fF\^[ catch(Exception e){e.printStackTrace ();} {XnPx?V } Lk.h.ST p`>d7S>" QN
G& //获得文件长度 I/s.xk_i public long getFileSize() J22r v( { '29WscU int nFileLength = -1; R&So4},B try{ (9GbG" URL url = new URL(siteInfoBean.getSSiteURL()); Lq04T0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #T%zfcUj httpConnection.setRequestProperty("User-Agent","NetFox"); gdi`x|0 yQ[u3tI w0Ij'=: int responseCode=httpConnection.getResponseCode(); _D-Riu>#J if(responseCode>=400) m6U8)!)T { 5"=:#zN processErrorCode(responseCode); 7rIlTrG return -2; //-2 represent access is error (cs~@ } K`4GU[ul X8CVY0<o GS%b=kc String sHeader; dVGbe07 #nEL~& /77z\[CeYH for(int i=1;;i++) 2k+16/T { -e*BqH2t //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v2J0u:#, //Utility.log(in.readLine()); :s*>W$Wp4 sHeader=httpConnection.getHeaderFieldKey(i); _4R,Ej} if(sHeader!=null) C1QWU5c v { ZvH{wt
if(sHeader.equals("Content-Length"))
{tt$w>X { ~ hm`uP nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); JEHK:1^ break; qG9qN.|dC } KO,_6>8]U } treXOC9^B8 else V^En8 break; cU+>|'f& } d8:C3R } kZ[mM'u# catch(IOException e){e.printStackTrace ();} ]^@0+! catch(Exception e){e.printStackTrace ();} {A3m+_8 I,j3bC 2Xgx*'t\ Utility.log(nFileLength); NG9vml d@g2k> > 0w3b~RJ return nFileLength; 0&$xX!] } xIgql}. c]v
+ :6u~aT/ //保存下载信息(文件指针位置) kF-TG3 private void write_nPos() lzfDH=& { ORH93` try{ oT->^4WY output = new DataOutputStream(new FileOutputStream(tmpFile)); Wc;+2Hl[@ output.writeInt(nStartPos.length); Cef7+fa for(int i=0;i<nStartPos.length;i++) NI\H
\#bJ { h{/ve`F>@ // output.writeLong(nPos); x,1=D~L} output.writeLong(fileSplitterFetch.nStartPos); (C `@a/q output.writeLong(fileSplitterFetch.nEndPos); RVP 18ub.S } 1+^n!$ output.close(); $L&BT 0 } F+*Q <a4 catch(IOException e){e.printStackTrace ();} %6 ]\^ catch(Exception e){e.printStackTrace ();} 4oJ$dN } +/q0Y`v yW>R RE; J3&Sj{ o //读取保存的下载信息(文件指针位置) k7T
alR private void read_nPos() `a'`$'j { a#QByP try{ }+DDJ6Jzs DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); b42QBTeg int nCount = input.readInt(); XRa#21pQ nStartPos = new long[nCount]; @1.9PR$x nEndPos = new long[nCount]; ]fC7%"nB for(int i=0;i<nStartPos.length;i++) ][t6VA { $8@+j[> nStartPos = input.readLong(); W 5I=X]& nEndPos = input.readLong(); \`gEu{ } iGa}3pF input.close(); CB]l[hM$ } T*\$<- ^ catch(IOException e){e.printStackTrace ();} M=+M8M`Iy catch(Exception e){e.printStackTrace ();} A^g>fv
} hVZo"XUb JUU&Z[6J 6
[ _fD private void processErrorCode(int nErrorCode) ITc`]K { (H-cDsh;c System.err.println("Error Code : " + nErrorCode); {]["6V6W } R&!]Rl9hf +-P<CCvWz WRM$DA //停止文件下载 o=mo/N4 public void siteStop() wA",SBGX { y.ql#eQ, bStop = true; .C?GW1[c~@ for(int i=0;i<nStartPos.length;i++) >)y$mc6 fileSplitterFetch.splitterStop(); :<UtHf<=k 5Hy3\_ + ucM.Ro=@ } os_WYQ4>j } dyl
0]Z //负责部分文件的抓取 O+vcs4 **FileSplitterFetch.java [' t8C */ 6KB^w0oA package NetFox; [Q:f-<nH to51hjV hiIyaWU import java.io.*; , `"K import java.net.*; 9'X@@6b*' _XWnS9 <S{7Ro public class FileSplitterFetch extends Thread { @it/$>R^) e&ts\0 {\Ys@FF String sURL; //File URL @E(P9zQ/zy long nStartPos; //File Snippet Start Position V" }*"P-% long nEndPos; //File Snippet End Position _<2RYXBC int nThreadID; //Thread's ID }Az'Zu4 = boolean bDownOver = false; //Downing is over z \^ boolean bStop = false; //Stop identical gi 5XP]z FileAccessI fileAccessI = null; //File Access interface Iy.mVtcsZ ^Rk^XQCh %HVD^. V public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2_.CX(kI { L?Tu)<Mn this.sURL = sURL; S[sr'ZW this.nStartPos = nStart; }{t3SGs J this.nEndPos = nEnd; <K,[sy&Qy nThreadID = id; d QDLI fileAccessI = new FileAccessI(sName,nStartPos);//定位 >qn+iI2U } R Y9.n L,W:,i/C lfRH`u public void run() gtMw3D`FL { cTy'JT7 while(nStartPos < nEndPos && !bStop) =G*z
53 { u9,=po=+7f aC}p^Nkr"k s" N\82z) try{ -`g J URL url = new URL(sURL); 2;h+;G HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1Df,a#,y" httpConnection.setRequestProperty("User-Agent","NetFox"); %2,/jhHL String sProperty = "bytes="+nStartPos+"-"; :-U53}Iy httpConnection.setRequestProperty("RANGE",sProperty); FF jRf Utility.log(sProperty); p $XnOh G4O3h Y.` lm!FM`m InputStream input = httpConnection.getInputStream(); ]h0Y8kpd //logResponseHead(httpConnection);
<irpmRQr _trpXkQp ;8uHRcdQ byte[] b = new byte[1024]; A`g.[7 int nRead; -FaaFw:Z;A while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :k\}Ik { <oQ6 Z X nStartPos += fileAccessI.write(b,0,nRead); !x6IV25 //if(nThreadID == 1) }\EL;sT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); lZBv\JE } Gg}t-_M xmOM<0T 1j+eD:d' Utility.log("Thread " + nThreadID + " is over!"); C&e8a9*,(a bDownOver = true; ?o8a_9+ //nPos = fileAccessI.write (b,0,nRead); PQ i
}Evxa } -GFwFkWm catch(Exception e){e.printStackTrace ();} l-XnB } ZDfS0]0F } 0xLkyt0 d0TgqO{ *0lt$F$~b //打印回应的头信息 K1<k+t/V public void logResponseHead(HttpURLConnection con) !%X>rGkc { g4i #1V= for(int i=1;;i++) b13nE. { o16d`}/< String header=con.getHeaderFieldKey(i); 0:jsV|5B8 if(header!=null) =I7[L{+~Y //responseHeaders.put(header,httpConnection.getHeaderField(header)); L-j/R1fTvl Utility.log(header+" : "+con.getHeaderField(header)); y>4p~ else s
*K:IgJ/ break; MV9r5 |3- } aE}=^%D } V@Ax}<$A @kS|Jz$iY w~ijD ^g public void splitterStop() $f9 ,##/ { <Nvlk\LQ bStop = true; dWMccn;-m } 3Nc'3NPQ' e5QOB/e& ]Kof sU_{ } p1C_`f N, Q:kwQg:~ g^qz&;R] /* .iN-4"_j1 **FileAccess.java vs*>onCf *//文件访问(定位,写) *13g<#$ package NetFox; w' .'Yu6 import java.io.*; y(V&z"wk[ { 576+:* gfV]^v public class FileAccessI implements Serializable{ D\@e{.$MZ| y|$vtD%c //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 m9 ^m RandomAccessFile oSavedFile; SlR7h$r' long nPos; ?56~yQF/2 |C^
c0 tWcizj;?wK public FileAccessI() throws IOException ^
sS>Mts { @T9m}+fR this("",0); A{G5Plrh } &~z+ R="= tX+0 GLz cAYa=}~< public FileAccessI(String sName,long nPos) throws IOException ;O Q#@|D { nZ" {y oSavedFile = new RandomAccessFile(sName,"rw"); y?[5jL|Ue this.nPos = nPos; pM1=UF oSavedFile.seek(nPos); od;Bb } d&O'r[S #($k 3OA oXnC"y}0P public synchronized int write(byte[] b,int nStart,int nLen) 3| GNi~ { >fW+AEt\JB int n = -1; JHnk%h0 try{ #(m`2Z`H oSavedFile.write(b,nStart,nLen); [lmHXf@1C n = nLen; PWADbu{+ } ^vYVl{$bT catch(IOException e) 3WQRN_ { w:~nw;.T e.printStackTrace (); 6 Xzk;p } d;;>4}XJ] }qG?Vmq*R[ em f0sL return n; ;D%$Eh&oma } LsuAOB 8 !l sy&6 Oz"@yL} }
e-L5=B 67Af} >Q )->-~E}p9 /* j<`I\Pmv **SiteInfoBean.java p.6$w:eV */ Y\ #.EVz package NetFox; ;u4@iN}p )^*9oqQ ?$>u!V<' public class SiteInfoBean { .=.yZ {hkM*:U s!8J.hD'I private String sSiteURL; //Site's URL W}#QKZ)MB private String sFilePath; //Saved File's Path G%V=idU*" private String sFileName; //Saved File's Name EuR!yD private int nSplitter; //Count of Splited Downloading File X
,V= od> GC5#1+fQ U89]?^|bb public SiteInfoBean() :F!dTD$ {//nSplitter的缺省值为5 EM>c%BH<N //default value of nSplitter is 5 eONeWY9 this("","","",5); .y/NudD } rCnV5Yb0O d/ 'A\"o+ D=5t=4^H( public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7Va#{Y;Zy { UUdu;3E=5 sSiteURL= sURL; ~:P8g<w
sFilePath = sPath; a}[=_vb}K sFileName = sName; ?3B t;<^ this.nSplitter = nSpiltter; %x cM_|AyR ?<>,XyY Egjk^:@ } [9YlLL@ thlpj*| L.I}-n public String getSSiteURL() Pq[0vZ_}dN { ,J`lr
U0 return sSiteURL; 110>p } 84hi, S5P >[E|p6jgT ei|*s+OZu public void setSSiteURL(String value) "c !oOaA { kMJQeo79 sSiteURL = value; 3[|:sa8?s } '
q=NTP x3Dg%=R Pi"tQyw39$ public String getSFilePath() \@
WsF$
{ NbQMWU~7 return sFilePath; rH2tC=% } C>k;Mvq O BRSgB-Rr7 XEgx#F ;F public void setSFilePath(String value) Im' :sJ31 { *$4A|EA V sFilePath = value; k_En_\c?p2 } >H=Q$gI %1 VNP(E 5 vu_D^Q public String getSFileName() [#P`_hx { =?`y(k4a return sFileName; cc2 oFn } H>X\C;X[
Jegx[*O>b yG4LQE public void setSFileName(String value) +qSr=Y:+ { #0YzPMV sFileName = value; Ck/_UY| } &)"7am(S` nM (=bEX cV=_GE public int getNSplitter() '7O{*=`oj { v,!Y=8~9 return nSplitter; s:m<(8WRw } tsSS31cv &=6cz$]z UVoLHd public void setNSplitter(int nCount) kb}]sj { 2XecP'+m nSplitter = nCount; #by9D&QP] } jt10gVC } ^b `>/> ZimMjZ%4 [ilv/V< /* Z9
q{r s **Utility.java d'x<F[`O */ "e7$q&R
| package NetFox; F)<G]i8n~ h2/1S{/n] hOrk^iYN= public class Utility { +k(3+b$S- )R
a/
~a8G 5M public Utility() 5S-o
2a { YL&b9e4 1UA~J|&gi^ /nD0hb } 8a$jO+UvN lA
Ck$E //线程睡眠 7L~ zI>2 public static void sleep(int nSecond) h7W%}6Cqkw { f'i8Mm4IL try{ =Q=&Ucf_ Thread.sleep(nSecond); (h@yA8>n } , C@hTOT catch(Exception e) l]klV+9t { Bg+]_:<U e.printStackTrace (); D -+)M8bt } @|UIV } ^* /v,+01f 3W0E6H" //日志 GT\s!D;< public static void log(String sMsg) 3RH#e1Y { eS@!\Hx System.err.println(sMsg); '*LN)E>d } 7s fuju( 9bcyPN cmGj0YUQ1 public static void log(int sMsg) ga1gd~a { %_@5_S System.err.println(sMsg); DneSzqO"o } SeJFZ0p } k4AE`[UE I }W-5% KutgW#+40 /* ':R3._tw\ **TestMethod.java +8vzkfr3It */ 7Ae,|k package NetFox; >~wk 3f2Hjk7,d
Z"%O&O public class TestMethod { ;R|#ae@ Nj@?}`C 4 \F+o= public TestMethod() >La L!PnZ { ///xx/weblogic60b2_win.exe 3ws(uF9$ try{ wyA(}iSq SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~G^}2#5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 53+rpU_ SiteFileFetch fileFetch = new SiteFileFetch(bean); d_7Xlp@ fileFetch.start(); gjN!_^_ } .]ZuG
catch(Exception e){e.printStackTrace ();} lbuW*) =UKR<@QrK .gkPG'm[ } Md?bAMnG+} _kY[8e5 't%%hw-m} public static void main(String[] args) %WT:RT_ { $J0~2TV< new TestMethod(); Gx* 0$4xJ3 } >0+|0ba } v7OV;ea$ 点击下载更多相关资料
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