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/* k&yQ98H$K" **SiteFileFetch.java p?}f|mQS) */ '^e0Ud, package NetFox; hI*`> 9l import java.io.*; QjI#Cs}w import java.net.*; b/z'`?[ l},dQ4R ijE<spG public class SiteFileFetch extends Thread { CcBQo8!G
ccRlql( gAj0ukX5 SiteInfoBean siteInfoBean = null; //文件信息Bean o1Ne+Jt long[] nStartPos; //开始位置 ~KJ,SLzhx9 long[] nEndPos; //结束位置 @51z-T FileSplitterFetch[] fileSplitterFetch; //子线程对象 l+|1G long nFileLength; //文件长度 XMomFW_@ boolean bFirst = true; //是否第一次取文件 KuIkul9^% boolean bStop = false; //停止标志 d8rBu jT File tmpFile; //文件下载的临时信息 h>~jQ&\M DataOutputStream output; //输出到文件的输出流 Fs?( UM nT_*EC<. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F
~*zC`>Y public SiteFileFetch(SiteInfoBean bean) throws IOException s;anP0-O { O5ucI$s siteInfoBean = bean; =sxkr ih //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J0&zb'1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Tc9&mKVE%( if(tmpFile.exists ()) n'q
aR<bY { $I\))*a bFirst = false; d:A\<F read_nPos(); ^g}L`9fL } rFf:A-#l else jMTRcj];( { 52da]BW< nStartPos = new long[bean.getNSplitter()]; uPI v/&HA nEndPos = new long[bean.getNSplitter()]; K/!/M%GB6 } )gr}<}X)B ,;9ak-$8p m"5{D*| 4s[`yV
} \)FeuLGL9 >Dk1axZ!>/ f KFnCng public void run() Jw2B&)k/ { Ga]47pQ"F //获得文件长度 d#E(~t(^ //分割文件 `Q:de~+AM{ //实例FileSplitterFetch H~~7~1"x //启动FileSplitterFetch线程 { k
kAqJ //等待子线程返回 lt }r}HM+ try{ ;+TMx( if(bFirst) 7ESN! { &\JK%X.Jlt nFileLength = getFileSize(); /TzNdIv if(nFileLength == -1) %=laY_y
G { 976E3u"Vt System.err.println("File Length is not known!"); KX0<j } AEB/8%l};v else if(nFileLength == -2) gmXy>{T { vEu
Ka<5 System.err.println("File is not access!"); xylpiSJ } [Bl
$IfU else E~'q?LJOB { 1,m\Q_ for(int i=0;i<nStartPos.length;i++) ) ~ l\ { VI(RT-S6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); >`<Ued } Mr$# e for(int i=0;i<nEndPos.length-1;i++) aeEw# { 3Cq6h;!# nEndPos = nStartPos[i+1]; ^RY n8I } );0<Odw%. nEndPos[nEndPos.length-1] = nFileLength; d\v$%0 } qlz( W } <FCj)CP% NYWG#4D kA?X^nj@ //启动子线程 $Sp*)A]E` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; u)<Ysx8G for(int i=0;i<nStartPos.length;i++) !Sh^LYqn { |z.Gh1GCy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $ \? N<W siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x, G6\QmA nStartPos,nEndPos,i); i}.{m Et Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qzuQq94k fileSplitterFetch.start(); it(LphB8 } A~qW. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CnxK+1n l siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3$GY,B // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _<u8%\ nEndPos = " + nFileLength); /X(@|tk: // fileSplitterFetch[nPos.length-1].start(); @N,:x\
N BV}4 3r,1^h //等待子线程结束 G3 Idxs //int count = 0; Y}AmX //是否结束while循环 ap Fs UsE boolean breakWhile = false; Gg
7WmL jA20c(O .OVW4svX while(!bStop) lcu( "^{3 { ]jHh7> D write_nPos(); BNAguAxWo Utility.sleep(500); y#hga5 breakWhile = true; <_##YSGh, }"F
?H:\ F Q8RK~?` for(int i=0;i<nStartPos.length;i++) xi
'72 { w$w>N(e if(!fileSplitterFetch.bDownOver) ovhC42i { Z7tU0 breakWhile = false; jxRF" GD break; 8@Egy%_ } *(?U } :z0s*,QH if(breakWhile) ]_^"|RJ break; \_m\U.* w.4u=e >Z4 \zk?$'d //count++; r1[E{Tpz //if(count>4) RB S[*D // siteStop(); GM)\)\kNF } 3::3r}g -/(DPx !Iw{Y' System.err.println("文件下载结束!"); {]t\`fjrg } )GiFkG catch(Exception e){e.printStackTrace ();} Y9IJ } C m,*bgX @<@R=aqE %8}WX@SB //获得文件长度 =oL8d6nI public long getFileSize() YtwmlIar` { \Dvl%:8 int nFileLength = -1; @A~B
, try{ W~XV URL url = new URL(siteInfoBean.getSSiteURL()); oso1uAOfp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D..{|29,: httpConnection.setRequestProperty("User-Agent","NetFox"); N<#S3B?. 2*~JMbm }m=tzHB* int responseCode=httpConnection.getResponseCode(); 9[epr+f if(responseCode>=400) Jcwh|w9D8 { Zu2m%=J` processErrorCode(responseCode); 9IS1.3 return -2; //-2 represent access is error @{J!6YGh } N.fQ7z=Z(M Hrd5p+j OPvj{Dv$0 String sHeader; d-6sC@PB 2ru*#Z#( f7EIDFX>pt for(int i=1;;i++) Zd[y+$> { 2.fyP"P
L //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); TIK/ %T //Utility.log(in.readLine()); A%NK0j$;} sHeader=httpConnection.getHeaderFieldKey(i); `l[6rf_. if(sHeader!=null) 1S*8v 7 { "4Vi=* 2V if(sHeader.equals("Content-Length")) p6&LZ=tL3 { htUy2v#V nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h/0<:eZ* break; w%i+>\tO } p=8M0k } I2t-D1X else !#,- break; 8!`7- } E"9/YWv } B#qL$M,| catch(IOException e){e.printStackTrace ();} 38x[Ad4% catch(Exception e){e.printStackTrace ();} ^D]7pe 9[t]] U<ku_(2"# Utility.log(nFileLength); 0UM@L
}L OBKC$e6I Hm+6QgCs return nFileLength; }<5\O*kX4 } b:}wR*Adc /I`cS%U ?YkO+?}+ //保存下载信息(文件指针位置) sx)$=~o private void write_nPos() KRnB[$3F1 {
m+72C]9 try{ 2R_opbw output = new DataOutputStream(new FileOutputStream(tmpFile)); C,OB3y output.writeInt(nStartPos.length); G<">/_jn for(int i=0;i<nStartPos.length;i++) *#prSS { \28b_,i+ // output.writeLong(nPos); ~# h E&nq output.writeLong(fileSplitterFetch.nStartPos); mR"2 output.writeLong(fileSplitterFetch.nEndPos); M\Uc;:) H } Mv7w5vTl output.close(); FT3,k&i } ~n8Oyr catch(IOException e){e.printStackTrace ();} PK.h E{R catch(Exception e){e.printStackTrace ();} {|Mxvp*Hg } xoz*UA. |*]X\UE zCj*:n //读取保存的下载信息(文件指针位置) &;NNUT>Q private void read_nPos() d!}jdt5% { xVHQ[I% try{ eu}:Wg2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); i
h`y0(< int nCount = input.readInt(); Pjj;.c 7_j nStartPos = new long[nCount]; Pq{YZMr nEndPos = new long[nCount]; 26('V `N for(int i=0;i<nStartPos.length;i++) evndw> { t(z(-G|& nStartPos = input.readLong(); cjy0s+>> nEndPos = input.readLong(); n7`.<*:
} Sq?6R}q% input.close(); >n$EeJ } ;4S
[ba1/ catch(IOException e){e.printStackTrace ();} ?v )"%. catch(Exception e){e.printStackTrace ();} $X.'W\o| } hIzPy3 %~B)~|h Tg<>B private void processErrorCode(int nErrorCode) QRg"/62WCD { /\3XARt System.err.println("Error Code : " + nErrorCode); =CG!"&T } \K_!d]I { N)
V7yo? Ivt)Eg //停止文件下载 st'?3A public void siteStop() nI|Lx`*v { GH; F3s bStop = true; O'&X aaZV for(int i=0;i<nStartPos.length;i++) fdCxMKlu; fileSplitterFetch.splitterStop(); <Hr@~<@~ 3*2&Fw!B rvoS52XG, } W(PW9J9 } W"}*Q-8W //负责部分文件的抓取 <4!&iU+; **FileSplitterFetch.java N8L)KgM5#7 */ V"2AN3~& package NetFox; H,4,~lv| n_xQSVI0F .2(@jx,[ import java.io.*; :hl}Zn~jt import java.net.*; qRP8dH fbx;-He! +}G>M=t:: public class FileSplitterFetch extends Thread { i/O,`2
&' Nk2{ ++p&
x{ String sURL; //File URL j9L+.UVI, long nStartPos; //File Snippet Start Position v;F+fOo long nEndPos; //File Snippet End Position T h- vG int nThreadID; //Thread's ID 9^Vx*KVrU boolean bDownOver = false; //Downing is over d@>k\6%j boolean bStop = false; //Stop identical a,0o{*(u$ FileAccessI fileAccessI = null; //File Access interface ?w5nKpG#RI @R-~zOv )H37a public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException nE"b` { .}hZ7>4- this.sURL = sURL; E*T84Jh6 this.nStartPos = nStart; g!kRa.`u1 this.nEndPos = nEnd; -Bwu$$0 nThreadID = id; e,j ?_p fileAccessI = new FileAccessI(sName,nStartPos);//定位 $RFu
m'`5 } G/RheH
G <GFB'`L Bdk{.oh6 public void run() E6^S2J2 { tgF(=a]o while(nStartPos < nEndPos && !bStop) @Ozf}}# { yV]-Oa$*s0 YT 03>!B '`goy%Wd try{ ##+8GLQM URL url = new URL(sURL); WbD C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ofrlTw&o httpConnection.setRequestProperty("User-Agent","NetFox"); $d??( String sProperty = "bytes="+nStartPos+"-"; )i6U$,] httpConnection.setRequestProperty("RANGE",sProperty); kq.R(z+ Utility.log(sProperty); F0ivL` pt|$bU7 ;Q,).@<C InputStream input = httpConnection.getInputStream(); |s3HeY+Co //logResponseHead(httpConnection); PA-0FlV| g7Q*KA+ *ej o6> byte[] b = new byte[1024]; HOQ
_T4 int nRead; FLnAN; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) wM&x8 < { fvBC9^3 nStartPos += fileAccessI.write(b,0,nRead); *1$~CC7 //if(nThreadID == 1) .L TFa.jxA // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hpi_0lMkI } #pn AK 90if:mYA K'rs9v"K| Utility.log("Thread " + nThreadID + " is over!"); E~O>m8hF bDownOver = true; )I
UWM //nPos = fileAccessI.write (b,0,nRead); .N><yQ-j3' } +5}T!r catch(Exception e){e.printStackTrace ();} |(w#NE5 } ;<)-*?m9 } FCB/FtI0 ghO//?m z^HlDwsbm //打印回应的头信息 8RT0&[ public void logResponseHead(HttpURLConnection con) P :h4 { (Gk]<`d#N for(int i=1;;i++) G@I_6cE { T^H ) lC#R String header=con.getHeaderFieldKey(i); X qva&/- if(header!=null) J1ro\" //responseHeaders.put(header,httpConnection.getHeaderField(header)); 1#_j6Q2 Utility.log(header+" : "+con.getHeaderField(header)); nz?BLO= else /Ta0}Y(y break; 3)MM5
bb$ } EsxTBg } ~S{\wL53 3bL2fsn5 WoG public void splitterStop() (']z\4o { exN#!&;
bStop = true; oW1olmpp= } k.R/X ZZJ"Ny.2 YZtA:>;p } ZTz(NS
EK x3F L/^S Us~wv"L=UX /* QS?9&+JM | **FileAccess.java mb6?$1j *//文件访问(定位,写) Y~?YA/.x package NetFox; | BWK"G import java.io.*; H9m2Whq NP`ll0s ?B:wV?-` public class FileAccessI implements Serializable{ eOO*gM= MP&4}De //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U~@B%Msb
L RandomAccessFile oSavedFile; Fm~}A4 long nPos; mNB ]e5;N JM9Q]#'t -@?>nLQb public FileAccessI() throws IOException bN%MT#X { )
G&3V this("",0); p.Yg-CA } _BaS\U%1( n/Z =q?_ z#67rh{ public FileAccessI(String sName,long nPos) throws IOException X"59`Yh { @9
tvN} oSavedFile = new RandomAccessFile(sName,"rw"); ?O^:j!C6 this.nPos = nPos; qGUe0( oSavedFile.seek(nPos); <.XoC?j } ,(?4T~ RwHXn]1 Os]M$c_88 public synchronized int write(byte[] b,int nStart,int nLen) j~>
#{"C { %Ne>'252y int n = -1; XE%6c3s try{ I}3K,w/7mi oSavedFile.write(b,nStart,nLen); *Z(C')7r n = nLen; 9
f/tNQ7W } e';c8WF3E catch(IOException e) EB<tX`Wp { f3|=T8"t e.printStackTrace (); Q#bo!]H{t } :#KURYO< }+Z;zm@/6 ttt&sW` return n; &,|uTIs } 9:5NX3"p [NDYJ'VGe 3+PM_c)Y } @D{[Hj`< !-Q!/? uT2cHzqKB /* ;8kfgpM_ **SiteInfoBean.java )Em,3I/.l */ o: DnZN package NetFox; Li$k<AM 'v)+S;oB S8<aq P public class SiteInfoBean { 0kEq|k9 skArocs WL]'lSHa private String sSiteURL; //Site's URL 'm((G4 private String sFilePath; //Saved File's Path *Y?]="8c#; private String sFileName; //Saved File's Name f
8U;T$) private int nSplitter; //Count of Splited Downloading File j0M;2 3@[ </Lqk3S-! hZG{"O!2s public SiteInfoBean() ?7s {//nSplitter的缺省值为5 0 ']M,iC/ //default value of nSplitter is 5 ^<b.j.$<z this("","","",5); +g30frg+Gl } 5lY9 g}h0J%s I[ C.iILL public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) |Q+v6r(<zZ { yU`IyaazZ sSiteURL= sURL; aa!c>"g6 sFilePath = sPath; N.rB- sFileName = sName; pp _ddk this.nSplitter = nSpiltter; l)bUHh5[ >H! 2Wflm bsVOO9.4- } pYQs|5d sIM`Q% pc>R|~J{2 public String getSSiteURL() ;^]F~x} { r73Xh"SL return sSiteURL; t?Znil|o } RmCR"~ *()#*0 ]t<%>Z$ public void setSSiteURL(String value) / nRaxzf' { '?4[w]0J< sSiteURL = value; :eO0{JN4T } nQC[[G*x s=+G%B' {[dqXG$v ` public String getSFilePath() 5lbh
"m= { I}{eYXh return sFilePath; 0U~JSmj:2K } ]|(?i ,p <9vkiEo y3GIR
f;> public void setSFilePath(String value) C<ljBz`,t { ~a Rq\fx{ sFilePath = value; Ja2.1v|r. } nwYeOa/t v4zARE9# lnUy?0( public String getSFileName() ==9Ez { l0V@19Ec return sFileName; 0&@6NW&Mu } +ZO*~.zZ ,$>Z= ~x* wz57.e!Me= public void setSFileName(String value) sy?W\(x { fC[gu$f][ sFileName = value; CJ >=odK[ } O jmz/W BDg /pDnwg 2J5dZYW public int getNSplitter()
aY~IS?!; { 'Z[R*Ikzq return nSplitter; dEnhNPeRl } *BV .zbGm #;)7~69 O)?0G$0 public void setNSplitter(int nCount) >'eqOZM { 78"W ~`8 nSplitter = nCount; VrG |/2 } !.A>)+AK } SE1 tlP c4|.!AQ> rXMv&]Ag /* H+Wd#7l, **Utility.java .0
K8h:I */ 0 N(2[s_A package NetFox; -$rfu {_JLmyaerZ 0J"3RTt public class Utility { &W%TY:Da| _nt%&f !E8JpE|z# public Utility() ,$Mw/fA { :d;5Q\C` 2t'&7>Ys{ _<8y^ymo } @QEVl &nss[w$%C //线程睡眠 gVc[`(@h public static void sleep(int nSecond) 0qv)'[O { gDrqs>8 try{ Lv"83$^S9 Thread.sleep(nSecond); W~qo
`r } )8_0 d) catch(Exception e) 7g$t$cZby, { QZY(S*Up e.printStackTrace (); VmW_, } b({2|R } cjL!$OE6 ;%)i/MGEB //日志 XpGom;z^c public static void log(String sMsg) [O3R(`<e5 { F^f]*MhT" System.err.println(sMsg); z)0F k } LImD]e` sdY6_HtE !dGgLU_ public static void log(int sMsg) 9D
bp`%j { Kr<O7t0X System.err.println(sMsg); 6\bbP>ql } s}.nh>Q } AxeWj%w@ >/>a++19 hN.#ui5 $ /* R#t~i&v/ **TestMethod.java psMagzr&)e */ 4xlsdq8`t package NetFox;
&HE8O}<> REJ}T: .F]6uXd public class TestMethod { >TE&myZ?* biJU r^n %ug`dZ/ public TestMethod() 5H79) n> { ///xx/weblogic60b2_win.exe OygYP try{ ?E`J-ncP SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); myYe~f4=HQ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9'tM65K SiteFileFetch fileFetch = new SiteFileFetch(bean); mb#)w`< fileFetch.start(); !#r]f9QP } iJ\#su catch(Exception e){e.printStackTrace ();} i-Z@6\/a5 D@Q|QY5qic b`2~ } pyN PdEy 6x{B 5rc<ibGh public static void main(String[] args) {BJxRH"&6* { ELm# new TestMethod(); hZpFI?lqc\ } []@Mk } zIL.R#|D= 点击下载更多相关资料
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