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/* pgiZA?r*< **SiteFileFetch.java L+p}%!g */ U,Uy0s2r package NetFox; od5nRb import java.io.*; `2LmLFkb import java.net.*; 2G$px fP5i3[T 5>+@.hPX public class SiteFileFetch extends Thread { TfT^.p* ?jUgDwc(w /3Gq&[R{ SiteInfoBean siteInfoBean = null; //文件信息Bean ZOcpF1y long[] nStartPos; //开始位置 m_CWVw long[] nEndPos; //结束位置 ?bt;i>O\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 88,hza`#V long nFileLength; //文件长度 Hg<aU*o; boolean bFirst = true; //是否第一次取文件 7)5G 1 boolean bStop = false; //停止标志 _h5d~ File tmpFile; //文件下载的临时信息 w8R7Ksn( DataOutputStream output; //输出到文件的输出流 gd]S;<Jh HcJ!( //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) o$l8"Uv public SiteFileFetch(SiteInfoBean bean) throws IOException =0]K(p, { y6tqemz siteInfoBean = bean; yP"}(!~m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |;xEKnF tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); JbL3/h] if(tmpFile.exists ()) Dy,MQIM|! { v%AepK& bFirst = false; YTZ :D/ read_nPos(); Zi+F IQ( } Gf3-%s xA else :wXiz`VH { #::+# G nStartPos = new long[bean.getNSplitter()]; 6H:
fg nEndPos = new long[bean.getNSplitter()]; ,b - } Anu: 7gN;9pc$ pZopdEFDK|
m (MQ }
ar\|D\0V d/j?.\ >'W,8F public void run() p+|8(w9A${ { Z!~_#_Ugl //获得文件长度 {6 h 1
//分割文件 ^h2+"" //实例FileSplitterFetch 3^%2, //启动FileSplitterFetch线程 ,7bhUE/VB //等待子线程返回 %L-qAI&V try{ /CO=!*7fz
if(bFirst) L&)e}" { aVK,(j9u nFileLength = getFileSize(); mj e9i if(nFileLength == -1) s|A[HQUtJ { e+-#/i* System.err.println("File Length is not known!"); 6q8}8;STTY } AVw oOvJ else if(nFileLength == -2) i0/QfB%O { b way+lh System.err.println("File is not access!"); @@U } >A X_"Q~ else ZCj1Cz]"l< { SyI~iW#Y1 for(int i=0;i<nStartPos.length;i++) Qt{){uE { iTq&h=(n nStartPos = (long)(i*(nFileLength/nStartPos.length)); tt2
S.j } 9ghzK?Yc for(int i=0;i<nEndPos.length-1;i++) X"d"a={] { y3b"'-% nEndPos = nStartPos[i+1]; m4oj1h_4 } tmq?h%O> nEndPos[nEndPos.length-1] = nFileLength; }:c~5whN } 4V4S5V } B-w`mcqp$ u9KT_`
) '_4apyq| //启动子线程 _,60pr3D' fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; xBc|rqge for(int i=0;i<nStartPos.length;i++) -O?HfQ { CF','gPnc fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), BK4S$B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), d3q.i5']G nStartPos,nEndPos,i); Qd YYWD
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); u28$V]
fileSplitterFetch.start(); \3^V-/SJf } h M7 SGEV // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9#P~cW? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); i"iy 0? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", K/Yeh<_& nEndPos = " + nFileLength); ![ce } // fileSplitterFetch[nPos.length-1].start(); R|8L'H+1x 467"pqT UakVmVN/P //等待子线程结束 )#M$ov //int count = 0; )#i"hnYpQ //是否结束while循环 %i3[x.M boolean breakWhile = false; %.f%Q?P |wv+g0]Pg^ mxF+Fp~ while(!bStop) PVF:p7 { %G2g
@2 write_nPos(); W`vPf Utility.sleep(500); ysG1{NOl breakWhile = true; <";1[A%7< H
$Az,-P oY0b8=[ for(int i=0;i<nStartPos.length;i++) ibZ[U p? { \8<[P(!3 if(!fileSplitterFetch.bDownOver) Gr&e]M[ l { N".BC|r breakWhile = false; UW8yu.`? break; 7Ko*`-p } P.q7rk< } +JC"@
if(breakWhile) '@+q_v@Jl break; Ew{*)r)m d9S?dx w=(dJ(7gu //count++; BNjMq //if(count>4) H.XyNtJ // siteStop(); <)a$5"AP } OqMdm~4B!j /KC^x=Xv: ]U'zy+ System.err.println("文件下载结束!"); s?m_zJh } FO[ s;dmzu catch(Exception e){e.printStackTrace ();} 4Ol1T(J# } Hs8JJGXWB 3=oxT6"k fA<os+*9i //获得文件长度 =J)-#|eZG public long getFileSize() SC%HHu\l { hM!g6\ w int nFileLength = -1; /~WBqcl try{ !9HWx_,|Z URL url = new URL(siteInfoBean.getSSiteURL()); oXht$Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~Azj Y 8 httpConnection.setRequestProperty("User-Agent","NetFox"); 9v;[T%% *a\x!c" q:M'|5P int responseCode=httpConnection.getResponseCode(); G)NqIur*Z if(responseCode>=400) 6p&2A { ( z)#}TC processErrorCode(responseCode); V*O[8s%5v return -2; //-2 represent access is error H1q,w|O9j } ;:oJFI#; <5j%!6zo _8y4U[L String sHeader; .p=J_%K}0x _i7yyt;h ji4bz#/B0 for(int i=1;;i++) lY@2$q9BT { `5oXf //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2i#Ekon //Utility.log(in.readLine()); ?o6#i 3k#' sHeader=httpConnection.getHeaderFieldKey(i); eB9&HD: if(sHeader!=null) zBq&/? { A7#nBHwxZ if(sHeader.equals("Content-Length")) Y=Ic<WHR { ^fO9oPM| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); KwaxNb5 break; T zS?WYF } ,d lq2 } 0/|Ax-dK else sl@>GbnS break; 4HZXv\$ } 2#yDVN$ } N$t<&5+ catch(IOException e){e.printStackTrace ();} pN9U1!|uam catch(Exception e){e.printStackTrace ();} LcA7f'GVK
<6;@@ >0iCQKq Utility.log(nFileLength); #b)`as?!1 M~`^deU1 `S4*~Xx return nFileLength; %ueD3;V } }.8yKj^p \i-CTv6f `ItoL7bi //保存下载信息(文件指针位置) kzK9. private void write_nPos() x%ccNP0 { KrG,T5 try{ NhTJB7 output = new DataOutputStream(new FileOutputStream(tmpFile)); >iG3!Td)y output.writeInt(nStartPos.length); HrZX~JnTmf for(int i=0;i<nStartPos.length;i++) :|ahu { 6XCFL-o- // output.writeLong(nPos); B:UM2Jl
output.writeLong(fileSplitterFetch.nStartPos); KlS#f output.writeLong(fileSplitterFetch.nEndPos); "Vl4=W)u } :Sd`4"AA output.close(); sz/^Ie-~ } cl4_M{~ catch(IOException e){e.printStackTrace ();} (`#z@,1 catch(Exception e){e.printStackTrace ();} r: >RH, } mqsAYzG K8[Um!( ='+I dn#5 //读取保存的下载信息(文件指针位置) !"RRw&0M private void read_nPos() -(lP8Y~gFY { kmu`sk" try{ 9I<~t@q5e@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }!Pty25j int nCount = input.readInt(); umnQ$y
0 nStartPos = new long[nCount]; +rSU nEndPos = new long[nCount]; CSW+UaE for(int i=0;i<nStartPos.length;i++) Gl|n }wo$ { z>y#^f)r nStartPos = input.readLong(); #l- 0$ nEndPos = input.readLong(); q o^mp } S#y GqN0i input.close(); a%kvC#B } ,g0t&jITo catch(IOException e){e.printStackTrace ();} Np$&8v+en catch(Exception e){e.printStackTrace ();} o-l-Z|)7 } D{y7[#$h$ H =~7g3 PrfG private void processErrorCode(int nErrorCode) yVXVH CB { ?fC9)s System.err.println("Error Code : " + nErrorCode); d8 Jf3Mo } Wuk8&P3 0m> 8 ]i0=3H2 //停止文件下载 U~?mW,iRL public void siteStop() 6=,zkU*i^ { -$g~,dIwj bStop = true; #6D>e~>n for(int i=0;i<nStartPos.length;i++) 9v-Y*\!w. fileSplitterFetch.splitterStop(); /~;!Ew|q kkb+qo J}8p}8eF, } O(=9&PRi }
#QcRN?s //负责部分文件的抓取 rMjb,2*rC7 **FileSplitterFetch.java MXEI/mDYK */ T=sAy/1oR package NetFox; `T1bY9O. 1HAnOy0 =v<A&4 import java.io.*; 0QfDg DX import java.net.*; C$C>RYE?. +%K~ vV9vB3K5? public class FileSplitterFetch extends Thread { _&s pMf 8qw{e`c =23@"ji@D String sURL; //File URL olxxs( long nStartPos; //File Snippet Start Position ln8NcAEx long nEndPos; //File Snippet End Position /2/aMF(J int nThreadID; //Thread's ID 5=#d#dDc boolean bDownOver = false; //Downing is over emrA!<w!W boolean bStop = false; //Stop identical OA\]|2 : FileAccessI fileAccessI = null; //File Access interface VMJaL}J] k%O3\q ]'Ho)Q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException OUGkam0UK { ;]>)6 this.sURL = sURL; }KIS_krs this.nStartPos = nStart; ,tyPZR_ this.nEndPos = nEnd; C%]qK(9vvd nThreadID = id; #s\kF * fileAccessI = new FileAccessI(sName,nStartPos);//定位 SRk!HuXh } @0t[7Nv-1 $)9|"q6 Qyx~={.C~ public void run() @b^$h:H { lic-68T while(nStartPos < nEndPos && !bStop) HOPy&Fp { Nz`v+sp r[;d.3jtP X;)/<:mX try{ ceCO *m~ URL url = new URL(sURL); qS!N\p~> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Pz:,de~5Qm httpConnection.setRequestProperty("User-Agent","NetFox"); =VZ_';b h String sProperty = "bytes="+nStartPos+"-"; e?+-~]0 httpConnection.setRequestProperty("RANGE",sProperty); m$v >r\*X Utility.log(sProperty); @sg.0GR yOKzw~;0% Y0EX{oxt1 InputStream input = httpConnection.getInputStream(); aL+>XN //logResponseHead(httpConnection); 5 *YvgB; m0v.[61 M
| "'`zc byte[] b = new byte[1024]; Y(kf<Wo int nRead; >.K%W*t while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) P\6:euI { iZeq
l1O nStartPos += fileAccessI.write(b,0,nRead); W,CAg7:* //if(nThreadID == 1) #\D74$D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [Eu)~J* } ZOa| lB (, LK}FI*A_ vo*oCfm Utility.log("Thread " + nThreadID + " is over!"); 6XU p$Pd( bDownOver = true; BU??}{ //nPos = fileAccessI.write (b,0,nRead); Gs3V]qbEP } 6G"UXNa, catch(Exception e){e.printStackTrace ();} h| wdx(4
} ?#Z4Dg
9| } \
ya@9OA |#Lz0<c; p?ccBq //打印回应的头信息 g9VY{[V public void logResponseHead(HttpURLConnection con) g\.$4N { ,3f>-mP
for(int i=1;;i++) ku]?"{Xx { `<>QKpAn String header=con.getHeaderFieldKey(i); kI@<H< if(header!=null) IHd
W!q //responseHeaders.put(header,httpConnection.getHeaderField(header)); "P(obk Utility.log(header+" : "+con.getHeaderField(header)); $rr@3H+
else v)_FiY QQ6 break; ?(d1;/0v> } N AY3.e } u?dPCgs;h {xov8M 3Xd:LDZ{ public void splitterStop() 3Z*o5@RI { AL3iNkEa bStop = true; J9]cs?`) } <anKw| "H`Be <n#X~}i) } Bh cp=# /(5"c> sr&W+4T /* z
rSPa\M **FileAccess.java I%a-5f$0 *//文件访问(定位,写) AzXLlQ package NetFox; ]2)A/fOW import java.io.*; j"h/v7~ zEW+1-=)+7 !1=OaOT public class FileAccessI implements Serializable{ lbIPtu XJ3sqcS //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7G-?^ RandomAccessFile oSavedFile; `{Q'iydU long nPos; bK~Toz<k *OFG3 uM
&U|c=$!\ public FileAccessI() throws IOException !vR Zh('R { b- t this("",0); f?k0(rl } h L [ eA W>d)( %ZWt 45A public FileAccessI(String sName,long nPos) throws IOException vZTXvdF { ^-k"gLg oSavedFile = new RandomAccessFile(sName,"rw"); Po@;PR= this.nPos = nPos; =r ^_D= oSavedFile.seek(nPos); |R@T`dW } U[?_|=~7 h^tCF=S DWKQ>X6 public synchronized int write(byte[] b,int nStart,int nLen) *1`X} { b1 w@toc int n = -1; 1s=Q~*f~d try{ G)}[!'<rR oSavedFile.write(b,nStart,nLen); jD9u(qAlH n = nLen; Y&O2;q/B } &U]/SFY catch(IOException e) <O'U-.
Gc { >rEZ$h e.printStackTrace (); C){Q;`M-< } ySO\9#Ho 9c)#j&2?H ;n(f?RO3X return n; (wZ!OLY%} } qovsM M rn*'[i? ,*6K3/kW } l|gi2~ %Y e
c]kt' ;i6~iLY /* \M\7k5$ **SiteInfoBean.java klm>/MXI` */ >bZ-mX)j\0 package NetFox; Ei @ \/3(>g?4 0 x-g0] public class SiteInfoBean { TxG@#" ^g} fS4W*P[B3 $Xlr@)% private String sSiteURL; //Site's URL !X-\;3kC0 private String sFilePath; //Saved File's Path C'$}{%Cc@$ private String sFileName; //Saved File's Name 'A:Y&w"r private int nSplitter; //Count of Splited Downloading File kMch )f:i4.M 2\1+M) public SiteInfoBean() I{(!h90 {//nSplitter的缺省值为5 lgU!D |v //default value of nSplitter is 5 BVb^ xL this("","","",5); LsERcjwwK } }UW*[dCf>C ?{f6su@rW o1(;"5MM public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Wds>'zzS { c 1F^Gj!8 sSiteURL= sURL; K& ^qn& sFilePath = sPath; X#$ oV# sFileName = sName; +-|""`I1I this.nSplitter = nSpiltter; ,#ZPg_x?1 9#:nlu9 'xqyG XI } ?Cf'IBpN mgx|5Otg ~+4lmslR public String getSSiteURL() .-rz30xT { N+c|0 return sSiteURL; La1:WYt } n&;JW6VQS G=17]>U ;
D<k public void setSSiteURL(String value) [#gm[@d, { ?l6yLn5si^ sSiteURL = value; .euAN8L } @9 S :: /8qR7Z^HZ Wu$ryX public String getSFilePath() Z .gb' { EWDsBNZaI return sFilePath; PM[W7gT } j? BL8E' Q*#Lr4cm{ ON\bD?(VY public void setSFilePath(String value) g3kbsi7_: { Gpxp8[ { sFilePath = value; U!|)M } lot`6] @
,X/Wf ZzE( S public String getSFileName() wd*B3 { jV*10kM< return sFileName; [IOI&`?D } y{mt *VA4 e x Z/ GqCBD-@4v. public void setSFileName(String value) tjtvO@?1- { np^&cY] sFileName = value; b_ZvI\H } a.%ps:
6NV592 s 7 nl public int getNSplitter() G]aey>) { 30^q_|l:] return nSplitter; O.Pp*sQ^ } ++,I`x+p A` _dj}UF 6t; ;Fz public void setNSplitter(int nCount) q("XS { g$GGo[_0 nSplitter = nCount; :} =lE"2 } [ x{$f7CEh } SV t~pE+Y 3#,6(k4> dM^EYW /* Cty{ **Utility.java *Ze0V9$' */ )KFxtM- package NetFox; ||X3g"2W9 kBk>1jn"
s*gqKQ; public class Utility { HQ"T>xb 'm*W< `:3nF' public Utility() e+BZoK ^ { ZOPK I=&i &6v8G H3$py|}lL } A!!!7tj >C_G~R //线程睡眠 3mU~G}ig public static void sleep(int nSecond) hev;M)t { $rW(*#C try{ k
?KJ8 Thread.sleep(nSecond); (
xooU 8d } X9?)P5h= catch(Exception e) MUl7o@{' { e]1'D e.printStackTrace (); 0^>,
} H}GGUE&c* } &mtt,]6C_ npzp/mcIe) //日志 xDw~n (* public static void log(String sMsg) m BvO<?ec { (^iF)z System.err.println(sMsg); [r"Oi|
8I } 3\}u#/Vb )lLeL#]FLO 7Q|<6210 public static void log(int sMsg) :8OT { 8:c=h/fa
System.err.println(sMsg); vzs4tkG } ]CLM'$ } DQK?y=vf rtAPkXJFM >(P(!^[f /* 5B)&;[ **TestMethod.java 39O rY */ G8vDy1`q6 package NetFox; G 3U[)(" X[Ufq^fyA /v9qrZ$$ public class TestMethod { R/"f g(i6Uj~) g|uyQhsg public TestMethod()
!D['}% { ///xx/weblogic60b2_win.exe #%QHb,lhl try{ G?@W;o) SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); MuMq%uDA" //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `l'T/F\ SiteFileFetch fileFetch = new SiteFileFetch(bean); `PAQv+EYz fileFetch.start(); jC[_uG } !dwZ` D catch(Exception e){e.printStackTrace ();} (rhlK}
C "|I.j) =5*Wu+S4r } plPPf+\ '|=Pw ?WXftzdf6u public static void main(String[] args) S||W { EGgw#JAi#t new TestMethod(); '6vo#D9M } kCEuzd=$V } ) ??N]V_U 点击下载更多相关资料
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