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/* P_}/#N{C **SiteFileFetch.java lBmm(<~Z */ ~0ooRUWU7 package NetFox; k}zd'
/b import java.io.*; UWw}!1 import java.net.*; lbS?/f e/>:K' { |!Fk2Je, public class SiteFileFetch extends Thread { f^?uY8< T(V8;! s^cc@C SiteInfoBean siteInfoBean = null; //文件信息Bean .H2qs{N! long[] nStartPos; //开始位置 FCiq?@ long[] nEndPos; //结束位置 6- ]h5L] FileSplitterFetch[] fileSplitterFetch; //子线程对象 zKxvN3! long nFileLength; //文件长度 {5-zyE boolean bFirst = true; //是否第一次取文件 [O_^MA,z boolean bStop = false; //停止标志 UiIF6-ZZ! File tmpFile; //文件下载的临时信息 _f3
WRyN0 DataOutputStream output; //输出到文件的输出流 (Y2mmd .T$D^?G!D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 13a(FG public SiteFileFetch(SiteInfoBean bean) throws IOException [4XC#OgA { @KA1"Wb_ siteInfoBean = bean; sa9fK Z'q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~{M@?8wi tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %b=p< h'( if(tmpFile.exists ()) .*!#98pT { 9afh[3qm bFirst = false; Me/\z^pF read_nPos(); Us-A+)r*! } Q]rqD83(( else ,H39V+Y* { !)c=1EX]" nStartPos = new long[bean.getNSplitter()]; ],[)uTZc nEndPos = new long[bean.getNSplitter()]; -CD\+d " } ^i'y6J K%gP5>y*9> rY,PSK/j 7Ms90oE/c } 2]2H++ c@(1:,R hH`Jb77L public void run() @o#+5P { $"8d:N?I[ //获得文件长度 kXwi{P3D$ //分割文件 %LQ/q3?_ //实例FileSplitterFetch n+;vjVS% //启动FileSplitterFetch线程 P+Z\3re //等待子线程返回 "-
eZZEl( try{ w!`Umll2 if(bFirst) iYKU[UP? { //.>>-~1m nFileLength = getFileSize(); U-EhPAB@ if(nFileLength == -1) "K?Q { 0pN{y}x, System.err.println("File Length is not known!"); 3taa^e. } 3SNL5 else if(nFileLength == -2) a2yE:16o6 { 1b3( System.err.println("File is not access!"); iF9_b } 1h=D4yN else z(H?VfJo { q4ipumy* for(int i=0;i<nStartPos.length;i++) l}}UFEA^ { *eUc.MX6x nStartPos = (long)(i*(nFileLength/nStartPos.length)); vT7g< } nbmc[!PwG for(int i=0;i<nEndPos.length-1;i++) <9ifPSvJ { )~
z Z'^ nEndPos = nStartPos[i+1]; L.B~ax.|Z } ll<mE, nEndPos[nEndPos.length-1] = nFileLength; |0
!I5|<k } <o0~H } )a cV-+{ [X/(D9J Sj-[%D* //启动子线程 6OB" , fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M"U OgS for(int i=0;i<nStartPos.length;i++) vM4<d> { 64U6C *w+ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >85zQ
1aL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?QpNjsF nStartPos,nEndPos,i); ;%zC@a~{ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); oT&m4I fileSplitterFetch.start(); gyu6YD8L } }c|U X
ZW // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y=2Un).& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); JsQ6l%9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", kX2d7yQZz nEndPos = " + nFileLength); l,d, T // fileSplitterFetch[nPos.length-1].start(); 6RK\}@^=K "!Lkp2\ :a3xvN-l //等待子线程结束 [B9 ;?G //int count = 0; 'MQ%)hipA //是否结束while循环 B8V,)rn boolean breakWhile = false; ]ii+S"U3 u) *Kws >ttuum12w while(!bStop) Acu@[I^ { yn~P{}68 write_nPos(); 1`-r#-MGG Utility.sleep(500); u^4h&fL breakWhile = true; mX\
;oV! B9M>e'H%< z~Na-N for(int i=0;i<nStartPos.length;i++) N:W9}, { p2d\ZgWD=) if(!fileSplitterFetch.bDownOver) ZK!A#Jm{ { T20VX 8gX breakWhile = false; R^8{bP break; ^}>/n. % } [,g~m9 } g1|w? pI1 if(breakWhile) l[%lE break; (E!!pz QxpKX_@Q5 YYUe)j{T //count++; gx;O6S{ //if(count>4) )^/0cQcJ // siteStop(); PW)aLycPK } =~|:t&v=c x-_vl
9P) cm@;* System.err.println("文件下载结束!"); %l$W*.j|; } 91d },Mq: catch(Exception e){e.printStackTrace ();} p;%<mUI } :6Pad
CL3xg)x6 kGHC]Fb) //获得文件长度 C-SLjJw public long getFileSize() 5
9-!6;T { O#_x)13 int nFileLength = -1; :&yDqoQKJ try{ ^:cRp9l"7 URL url = new URL(siteInfoBean.getSSiteURL()); 2 ZG@!Y| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); u#jC#u^M httpConnection.setRequestProperty("User-Agent","NetFox"); &u8z5pls8 OJ,m1{9$} h?j_Ry int responseCode=httpConnection.getResponseCode(); `X
-<$x if(responseCode>=400) I3) Zr+ { :.&{Z" processErrorCode(responseCode); L
*Y|ey return -2; //-2 represent access is error U[||~FW' } $0qMQ%P =NDOS{($ 2`Gv5}LfyR String sHeader; REA;x-u* 4v.d-^ 3 ^}A %-bS for(int i=1;;i++) fx?$9(r, { (bm;*2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )[&zCqDc //Utility.log(in.readLine()); m5-9yQ=. sHeader=httpConnection.getHeaderFieldKey(i); ]gP5f @` if(sHeader!=null) >. DC!QV { |wp,f%WK if(sHeader.equals("Content-Length")) e!X(yJI[O6 { *g$i5!yM' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :uK
btoA break; -%m3-xZA } 5PiOH"!19 } ,XB%\[pKe else C`K^L=8`{ break; jP=Hf=:$ } qd6fU^)i } J YmAn?o- catch(IOException e){e.printStackTrace ();} GyC)EFd catch(Exception e){e.printStackTrace ();} +5X DF \l,rpVv5m 5%i:4sMx
* Utility.log(nFileLength); 3V;gW%> t;O1IMF I/uy>* return nFileLength; 4Z5#F]OA7 } HEY4$Lf(I @x{`\AM|% j43$]'- //保存下载信息(文件指针位置) q|dH~BK private void write_nPos() .<&s%{EW { ' Q7Y-V try{ -x]`DQUg output = new DataOutputStream(new FileOutputStream(tmpFile)); 9-lEt l% output.writeInt(nStartPos.length); K*vU5S for(int i=0;i<nStartPos.length;i++) $8=@R' { p3]Q^KFS // output.writeLong(nPos); 5<R%H{3j output.writeLong(fileSplitterFetch.nStartPos); 1W,(\'^R output.writeLong(fileSplitterFetch.nEndPos); xeA#u
J } :b/J\ output.close(); gv.6h{Ut } g8pO
Lr' catch(IOException e){e.printStackTrace ();} ;JTt2qQKo catch(Exception e){e.printStackTrace ();} M$S]}
} wL{qD B3
zk(RNZ :1aL
? //读取保存的下载信息(文件指针位置) r`M6!}oa private void read_nPos() @WOM#Kc { vq'k|_Qi= try{ =/9^,
6Q( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); q]c5MlJXF int nCount = input.readInt(); k$"d^*R nStartPos = new long[nCount]; LN^f1/b* nEndPos = new long[nCount]; P3o@g kXP for(int i=0;i<nStartPos.length;i++) {"}V&X160o { Sycw %k nStartPos = input.readLong(); m $dV< nEndPos = input.readLong(); !m y8AWO' } r o\1]`6 input.close(); /@Y CA}|/ } J"CJYuGW, catch(IOException e){e.printStackTrace ();}
4na8 catch(Exception e){e.printStackTrace ();} x]4Kkpqm } Gi?_ujZR !@L=;1, ocQWQ private void processErrorCode(int nErrorCode) v#oi0-9o[ { 3S~(:#| System.err.println("Error Code : " + nErrorCode); dE(tFZx } H[WQ=){ z@U}~TvP M\oVA=d\0 //停止文件下载 ?dq#e9 public void siteStop() ?=On%bh { 4<S' bStop = true; _elX<o4 for(int i=0;i<nStartPos.length;i++) x\\7G^$<h fileSplitterFetch.splitterStop(); 6 "gj!/e Akk
3 Qx :0~QRc-u } \;9W.d1iU } u=NG6G //负责部分文件的抓取 -,#+`>w **FileSplitterFetch.java -4 Ux,9& */ &0
\
ci9o package NetFox; ~)X[(T{ %w}gzxN^ wSXVyg{ import java.io.*; nb,2,H import java.net.*; 3MBN:dbQ |D#2GeBw1h MQTdk*L_] public class FileSplitterFetch extends Thread { {7"0,2 Hb? t#wmAOW yI;"9G String sURL; //File URL "VUYh$=[ long nStartPos; //File Snippet Start Position 5LW}h^N long nEndPos; //File Snippet End Position ! fl4" int nThreadID; //Thread's ID dF@)M boolean bDownOver = false; //Downing is over +}kgQ^ boolean bStop = false; //Stop identical k2^ a$k} FileAccessI fileAccessI = null; //File Access interface j;nb?; ;`j/D@H X@wm1{! public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ig#r4nQ= { Ol@_(U this.sURL = sURL; E5GJi this.nStartPos = nStart; ZCui Fm this.nEndPos = nEnd; DDd/DAkCX nThreadID = id; })F*:9i* fileAccessI = new FileAccessI(sName,nStartPos);//定位 6[P-Ny{z } 6^F'|Wh kdrod [S 1%~ZRmd e public void run() Im72Vt:p- { ot%.M*h- while(nStartPos < nEndPos && !bStop) _^S]g mE { C"pB"^0 7}o/: HIc a nk try{ OM83S|1s URL url = new URL(sURL); _ -..~K.| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C"V%# K httpConnection.setRequestProperty("User-Agent","NetFox"); [3>GGX[Ic String sProperty = "bytes="+nStartPos+"-"; [0;buVU. httpConnection.setRequestProperty("RANGE",sProperty); /R8p] Utility.log(sProperty); yt0,^*t_ S;\R!%t_ @tT-JwU InputStream input = httpConnection.getInputStream(); <^R{U&Z@ //logResponseHead(httpConnection); D{7w!z Qst$S} n oF:v
JDSS byte[] b = new byte[1024]; X ]j)+DX> int nRead; A#@_V'a8 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Ub$n |xn { $W8Cf[a nStartPos += fileAccessI.write(b,0,nRead); YV'pVO'_+ //if(nThreadID == 1) ~2*9{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p3951-D } FiAY\4 n> w`26MMp cNK)5-
U Utility.log("Thread " + nThreadID + " is over!"); nhT(P`6 bDownOver = true; ).412I //nPos = fileAccessI.write (b,0,nRead); )r6EW`$ } oy.[+EI`| catch(Exception e){e.printStackTrace ();} hUpnI@ } c/3$AUsuO } ;/O#4]2* lx0~>K] B{6<;u)[ //打印回应的头信息 Q(7ob}+jQ public void logResponseHead(HttpURLConnection con) @E9" Zv-$ { PO-"M)M for(int i=1;;i++) ?;ukvD { -.I4-6~ String header=con.getHeaderFieldKey(i); h) (*q+a if(header!=null) !kuX,*}q //responseHeaders.put(header,httpConnection.getHeaderField(header)); /8yn vhF# Utility.log(header+" : "+con.getHeaderField(header)); QrYa%D+ else W#F Q,+0) break; w`HI]{hE~N } P87#
CAN } )q~DTR^z- C}}/)BYi k%'m *T f public void splitterStop() 3\$wdUFr { 2B1xUj ] bStop = true; yJx?M } VU.@R, @J'YV{] + =$ } 9i$NhfOe <v
0*]NiX /#LW"4;* /* #E7AmmqD% **FileAccess.java
=Ufr^naA *//文件访问(定位,写) Bn?V9TEoO package NetFox; zU5Hb2a import java.io.*; u eb-2[= TYns~X_PR 8AFczeg[[ public class FileAccessI implements Serializable{ []kN16F \[:/CxP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 m}j:nk RandomAccessFile oSavedFile; dR^"X3$ long nPos; aG`;OgrH G5.nPsuM cW8\d public FileAccessI() throws IOException F'm(8/A$ { i{c@S:&@^ this("",0); 95W?{>
@ } h11.'Eej` %b2oiKSBx? r{?TaiK public FileAccessI(String sName,long nPos) throws IOException ?
zDa=7 J { ! ]`
#JAL7 oSavedFile = new RandomAccessFile(sName,"rw"); Qeq5 gN] this.nPos = nPos; x *XH]&V oSavedFile.seek(nPos); wE\3$ s/{D } sq /]wzT: 0ZpFE& CO+/.^s7}S public synchronized int write(byte[] b,int nStart,int nLen) dP2irC%f8 { TCKu,}s int n = -1; @Yw,nQE)b try{ `\u;K9S6 oSavedFile.write(b,nStart,nLen); Y4.Eq+$gh n = nLen; GwU?wIIj^ } 9O*_L:4o catch(IOException e) *LC+ PZV@ { P$GjF-!: e.printStackTrace (); TtD@'QXq } Ey[On^$ F/d7q%I p>=[-(mt return n; 0U/,aHvhP } B@YyQ' #K\?E.9h }G <T :(a } 58xnB!h\} %(/!ljh_ VZn=rw /* `6Qdfmk= **SiteInfoBean.java QnouBrhO */ yF._*9Q3hK package NetFox; Ck =;1sGh B$Z3+$hfF P,DC 7\ public class SiteInfoBean { T'-FV RkEN
,xWE /\s}uSW private String sSiteURL; //Site's URL SlLw{Yb7\. private String sFilePath; //Saved File's Path R8ONcG private String sFileName; //Saved File's Name t`'iU$:1f private int nSplitter; //Count of Splited Downloading File 4\ c,)U} owpWz6k7 3-n19[zk public SiteInfoBean() NSAF4e {//nSplitter的缺省值为5 1SIq[1 //default value of nSplitter is 5 r,P1^ uHx this("","","",5); LA3<=R] } )D-c]+yt _?voU J
T#d(Y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N/QiI.V6 { LK9g0_ sSiteURL= sURL; $4FX(O0Q@ sFilePath = sPath; s?Uh| BfB sFileName = sName; r`S< A; this.nSplitter = nSpiltter; &ZHC-qMRK )}%O>% wXjFLg!g? } ^E`(*J/o |WryBzZ>on -~" :f8 public String getSSiteURL() nR>r2wMk@ { j VgFZ, return sSiteURL; X6+qpp } VQI(Vp| = VLS/\A {Hmo1|_S| public void setSSiteURL(String value) yqXH:757~ { \'CN sSiteURL = value; )py{\r9X } }V;+l8 3l<S}k@M) 22P$ ~ch public String getSFilePath() B\*@krI@ { sAJ7R(p return sFilePath; U_l'3oPJw } O#EV5FeF. lOwS&4UT \qvaE+ public void setSFilePath(String value) u}bf-;R { ow=UtA-^O sFilePath = value; Si9Z>MR } @XD+' {] 8.=\GV \,Lo>G`! public String getSFileName() 'D1A}X { >N\0"F7. return sFileName; &M/0g]4p } l=N2lHU raVA?|'g~ D0(xNhmKz public void setSFileName(String value) Z|9u]xL { '\fY<Q:! sFileName = value; =$8nUX` } am_gH tj]9~eJ- y %$O-q public int getNSplitter() Cd79 tu| { ;Yfv!\^ | return nSplitter; :4)Qt } [OTJV pC b*fgv9Kh' [+*$\ public void setNSplitter(int nCount) +`M!D }! { LWsP ya nSplitter = nCount; CxhY$%C (L }
d8SE,A& } Q(d9n8 rKHY?{! Fhz*&JC# /* }ZSQ>8a **Utility.java ffXyc2o */ }u+a<:pkK package NetFox; 6<,dRn `I$<S(h7 1QZ&Mj^^ public class Utility { _ ~RpGX {k.MS-q iz(u=/*\ public Utility() 0yx 3OY { KD1=Y80P =ItkFjhBc z)XRx:YU;$ } b5IA"w =&0wr6 //线程睡眠 Bx"7%[ public static void sleep(int nSecond) t#nn@Yf { ]nQt>R p_ try{ r!P}u Thread.sleep(nSecond); 2>-S-;i }
o47r<>t catch(Exception e) RO0>I8c1c { 3Y)PU= e.printStackTrace (); {Y}dv`G#Iu } aw?=hXR! } =z{JgD/ +5.t. d //日志 :0K8h public static void log(String sMsg) E|YdcS { ]Mj/&b>"e System.err.println(sMsg); Sp}D;7 } bi ozZ ]J9cVp G Ejd7s]C public static void log(int sMsg) V Km!Ri$ { FVv8-- System.err.println(sMsg); 4$/i%B#ad } .t&R>9cZ^ } Mfk2mIy T,fI BD: Tj~IaU /* 1[*UYcD **TestMethod.java *'"T$ib */ H4OhIxK package NetFox; G>YAJo (vR 9H(# a</D_66 public class TestMethod { ?Y:x[pOe ;)Kh;;e &`Y!;@K9W# public TestMethod() xX0-]Y h: { ///xx/weblogic60b2_win.exe Cp^@zw*/ try{ d"G+8}.4 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7z\m;
1 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); IdIrI SiteFileFetch fileFetch = new SiteFileFetch(bean); #jpoHvth fileFetch.start(); oIGrA-T} } ~zm7?_"@] catch(Exception e){e.printStackTrace ();} jUj<~:Q}3o TGuiNobD V~GWl1#7 } 1%M&CX b1pQ`qt CV$],BM public static void main(String[] args) D7]#Xk2 { _$<Gyz* new TestMethod(); U%7i=Z{^Ks } 5`~mmAUk;` } 8$|8`;I( 点击下载更多相关资料
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