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/* ~.e~YI80 **SiteFileFetch.java T|$tQgY^ */ NU.4_cixb package NetFox; B|^=2 >8s import java.io.*; P_Gu~B!Y import java.net.*; +sZY0(|K8 H2g#'SK@ BUL<FTg public class SiteFileFetch extends Thread { W>CG;x{ ER!s 9O&MsTmg$ SiteInfoBean siteInfoBean = null; //文件信息Bean E_D@7a long[] nStartPos; //开始位置 #K-O<:s=y long[] nEndPos; //结束位置 `P|V&;}K FileSplitterFetch[] fileSplitterFetch; //子线程对象 _!Z}HCk long nFileLength; //文件长度 %t.\J:WN; boolean bFirst = true; //是否第一次取文件 K.? S,qg boolean bStop = false; //停止标志 9,>c;7s X File tmpFile; //文件下载的临时信息 ?$\sMkn DataOutputStream output; //输出到文件的输出流 7O=7lQ SrdCLT8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \@NnL\t
u public SiteFileFetch(SiteInfoBean bean) throws IOException T-oUcuQB { C91'dM siteInfoBean = bean; xJ\sm8 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }&Xf<6 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *$t =Lh if(tmpFile.exists ()) ,/p.!+ { FSZ :}Q bFirst = false; @, z4{B read_nPos(); ~fpk`&nhe } =p8iYtI else NU7k2`bqAk { !*k'3rKOW nStartPos = new long[bean.getNSplitter()]; XPi5E" nEndPos = new long[bean.getNSplitter()]; V8%( h[ } ]MMXpj,9h !1+!;R@&H> 7c'OIY]., $4CsiZ6 } @A%\;oo S }G3h a /-ewCCzZV public void run() <5c^DA { g3'yqIjQL //获得文件长度 u&Xn#fh //分割文件 q+67Wc= //实例FileSplitterFetch u9}LvQh_6, //启动FileSplitterFetch线程 9aKCO4 //等待子线程返回 i"M$hXO try{ d+7Dy3i|g= if(bFirst) {*qz<U> { tjDCfJx* nFileLength = getFileSize(); `uqsYY`V if(nFileLength == -1) 6~8X/
-02 { Z9I
?j1K|! System.err.println("File Length is not known!"); rEsGf+4 } 8&y3oxA, else if(nFileLength == -2) -~=:tn)0 { EK^["_*A System.err.println("File is not access!"); YjeHNPf } Si[xyG6= else R%%h=] { ! lm0zR
for(int i=0;i<nStartPos.length;i++) :P\RiaZAT { naW!Mga nStartPos = (long)(i*(nFileLength/nStartPos.length)); 'y:+w{I2o } OD1>s6uA7 for(int i=0;i<nEndPos.length-1;i++) sJ cwN.s { kF"G {5 nEndPos = nStartPos[i+1]; h<f]hJ`ep } zlN<yZB^ nEndPos[nEndPos.length-1] = nFileLength; lJXihr } P'CDV3+ } {
BDUl3T vWpkU<&3| h*X
u/aOg //启动子线程 ^U@Erc#d fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; w}QU;rl8q for(int i=0;i<nStartPos.length;i++) J@pCF@' { )3KQ
QGi8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j.y8H siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7<3eB)S nStartPos,nEndPos,i); ;AK@Kb Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;K<W<v5m0N fileSplitterFetch.start(); n42XqR } xs3t~o3y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !8i[.EAT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); sa>}wz<o // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", FrBJv< nEndPos = " + nFileLength); =WP`i29j9} // fileSplitterFetch[nPos.length-1].start(); 3XomnL{ /tGj`C&qtw 4^rO K //等待子线程结束 ,~,{$\p //int count = 0; a6fqtkZ x //是否结束while循环 vT>ki0P_; boolean breakWhile = false; WAt | J2 5PU$D`7it D%k]D/ while(!bStop) $Sfx0?' { i=G.{. write_nPos(); ?sBbe@OC? Utility.sleep(500); LxC"j1wfl breakWhile = true; 4chSo.= 4V a\m@I_r.N ]ZOzqh_0C for(int i=0;i<nStartPos.length;i++) Tp0^dZ M+ { [J.-gN$X@ if(!fileSplitterFetch.bDownOver) r6*~WM|Sq7 { MHVHEwr.{ breakWhile = false; s&7,gWy}BE break; ")87GQ( R } !(EJ. |LH } zT5@wm if(breakWhile) p;VHg break; `II/nv0jn ekj@;6
d] s*U~Q=Z
//count++; ?!J{Mrdn //if(count>4) \y
G// // siteStop(); ITu6m<V } ,!RbFME&H =fZ)2q `/mcjKQ&9y System.err.println("文件下载结束!"); HjO-6F#s } !?7c2QRN catch(Exception e){e.printStackTrace ();} Ws;}D}+ } T53|*~u MWS=$N)v* q!
+? //获得文件长度 *y;(c)_w/% public long getFileSize() <d\Lvo[ { 9aE!!
(E int nFileLength = -1; {T]^C try{ Lit@ m2{\ URL url = new URL(siteInfoBean.getSSiteURL()); l 6;}nG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
5Y\wXqlY httpConnection.setRequestProperty("User-Agent","NetFox"); XD8MF)$9 od7 [h5r W7a aL int responseCode=httpConnection.getResponseCode(); #O<2wMb2< if(responseCode>=400) o1"MW>B,4 { `&"-| processErrorCode(responseCode); Qifjv0&;u return -2; //-2 represent access is error g$\Z-!( } RQZ|:SvV =?}
t7}# HY,+;tf2r String sHeader; Q]Fm4 94umk*ib 3@r_t|j for(int i=1;;i++) CV~\xYY { .cTK\ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); s:j"8ZH //Utility.log(in.readLine()); p=Nord sHeader=httpConnection.getHeaderFieldKey(i); i9.~cnk if(sHeader!=null) L,&R0gxi { Mb6#97 if(sHeader.equals("Content-Length")) 9Se7
1
{ @?A39G{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); asDq(J`sQ break; Mt@P}4 } S
aCa } 8:%=@p>$ else qV%t[> break; KKR@u(+"a } s}]qlg } k\T,CZ< catch(IOException e){e.printStackTrace ();} $td=h)S^` catch(Exception e){e.printStackTrace ();} }nDKSC/[V! %rpJZ
t $'I+] ; Utility.log(nFileLength); =#@eDm% 2 0Xqs, [b:$sR; return nFileLength; !%' 1x2? } ?j^[7 K|-?1)Um b_&;i4[ //保存下载信息(文件指针位置) ffuV158a& private void write_nPos() -_bHLoI { VZ?"yUZ Id try{ %[:\ZwT,- output = new DataOutputStream(new FileOutputStream(tmpFile)); VtX9}<Ch~ output.writeInt(nStartPos.length); as1ZLfN. for(int i=0;i<nStartPos.length;i++) `mro2A { oT7= // output.writeLong(nPos); 6&pI{ output.writeLong(fileSplitterFetch.nStartPos); $M F
U9<O output.writeLong(fileSplitterFetch.nEndPos); IL?mt2I Q> } cTO\Vhg output.close(); gU7@}P } ?)$+W+vK catch(IOException e){e.printStackTrace ();} 4Gl0h'!( catch(Exception e){e.printStackTrace ();} HS{a^c% } `I(#.* W\s
]qsLS 2 %YtMkC5 //读取保存的下载信息(文件指针位置) 0n25{N private void read_nPos() fk%yi[ { cPh
U qET try{ xjHOrr
OQ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); XeD9RMT int nCount = input.readInt(); *Mf; nStartPos = new long[nCount]; jseyT#2 nEndPos = new long[nCount]; 8+no>%L for(int i=0;i<nStartPos.length;i++) :3k&[W* { 5BvCP nStartPos = input.readLong(); %vjLw` nEndPos = input.readLong(); zGrUl|j } `8Y& KVhu input.close(); [AzQP!gi } gxEa?QH catch(IOException e){e.printStackTrace ();} d\aarhD8* catch(Exception e){e.printStackTrace ();} k!e \O> + } 90)0\i+P F+A"-k_\T# 808E) private void processErrorCode(int nErrorCode) ?CB*MWjd { UUy%:t System.err.println("Error Code : " + nErrorCode); Nz`4q%+ } e0O2>w IwC4fcZX6 v)|[= //停止文件下载 pkjf5DWp public void siteStop() RZm}%6##ZC { # Ny
bStop = true;
kt8P\/~*i for(int i=0;i<nStartPos.length;i++) NET?Ep fileSplitterFetch.splitterStop(); 1JIL6w_ k=,,s(]tx ZV}"k_+- } 5y7rY!]Bf } y2k'^zE //负责部分文件的抓取 ]3tg|?%B **FileSplitterFetch.java ]M
AB */ <7HVkAa package NetFox; {9sA'5 QFOmnbJg J+f
.r|? import java.io.*; t0_o.S import java.net.*; J(*qOGBD _{CMWo"l wjk-$p public class FileSplitterFetch extends Thread { Js7(TFQE EL!V\J`S_ 6~8A$: String sURL; //File URL }} cz95 long nStartPos; //File Snippet Start Position <
aeBhg% long nEndPos; //File Snippet End Position ,]?Xf> int nThreadID; //Thread's ID ,L#Qy>MOb boolean bDownOver = false; //Downing is over 1@Dp<Q boolean bStop = false; //Stop identical K;jV"R<9 FileAccessI fileAccessI = null; //File Access interface v3|-eWet^ sg"J00 ^)ouL25Z*2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `ER">@& { &7* |rshZ this.sURL = sURL; VU+` yQp this.nStartPos = nStart; 3`PPTG this.nEndPos = nEnd; f8`K8Y]4 nThreadID = id; QC7Ceeh]4 fileAccessI = new FileAccessI(sName,nStartPos);//定位 @y%4BU&>0 } x`8rR;N! aty"6~ /]H6' public void run() D=}UKd { c$?(zt; while(nStartPos < nEndPos && !bStop) &phers { f%n],tE6 ]v=*WK |J:n'} try{ +We_[Re`< URL url = new URL(sURL); Il(p!l<Xz# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *0>![v httpConnection.setRequestProperty("User-Agent","NetFox"); pME17 af String sProperty = "bytes="+nStartPos+"-"; +_Nr a httpConnection.setRequestProperty("RANGE",sProperty); r[xj,eIb Utility.log(sProperty); 4yhan/zA OO?d[7Wt0 `.3! InputStream input = httpConnection.getInputStream(); oej5bAi //logResponseHead(httpConnection); Yud]s~N V1Yab# eQh@.U*S) byte[] b = new byte[1024]; >B)&mC$$S int nRead; e~#;ux while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I&9_F%rX { wQR>S>p nStartPos += fileAccessI.write(b,0,nRead); %LBa;M //if(nThreadID == 1) KU,KEtf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D^cv
8 8< } USgZ%xk2 [ kI|Thx Tb~|p_;o Utility.log("Thread " + nThreadID + " is over!"); gO>XNXN{ bDownOver = true; zrt \]h+ //nPos = fileAccessI.write (b,0,nRead); 2$=U#!OtU } x*}41;j}C catch(Exception e){e.printStackTrace ();} B|%(0j8 } DONXq]f:," } 12
y=Eh p,_,o3@~ !|!k9~v! //打印回应的头信息 ><<(6 public void logResponseHead(HttpURLConnection con) @qP
uYFnw { 0$RZ~ for(int i=1;;i++) !*2cK>` { e/+_tC$@p@ String header=con.getHeaderFieldKey(i); YU=Q`y[k if(header!=null) +Sz%2Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); 5u/d r9n Utility.log(header+" : "+con.getHeaderField(header)); l%vX$Kw else r\#_b4-v3h break; UC3&:aQ! } WiDl[l"{9 } pib i# -Ky<P<@ezm R _#x public void splitterStop() Be~__pd { ?D 8<}~Do bStop = true; Fjnp0:p9X } R]dN-'U _=%F6}TE e6?iQ0 } ?=
G+L0t
12 {F a1^CpeG~ /* d|I_SI1 **FileAccess.java "LwLTPC2 *//文件访问(定位,写) n6A N package NetFox; KGM9
b import java.io.*; _H{6{!=y UCu0Xqf 8'K~+L=} public class FileAccessI implements Serializable{ qV;E%XkkS }j+Af["W? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #@pgB:~lB RandomAccessFile oSavedFile; F747K);_ long nPos; VtP^fM^{ o7gYj\ W4OL{p-\/ public FileAccessI() throws IOException 0B}O&DC%| { C8{bqmlm@ this("",0); Bb[WtT}= } {^J/S}L] 'iY~F 0U Fb2,2Px public FileAccessI(String sName,long nPos) throws IOException jF$bCbAUce { \eF_Xk[ oSavedFile = new RandomAccessFile(sName,"rw"); <QuIX A this.nPos = nPos; xL&evG# oSavedFile.seek(nPos); rt rPRR\:" } h+gaKh=k+ G_m $?0\ %IA1Y>` public synchronized int write(byte[] b,int nStart,int nLen) |~K 5] { H^Mfj!S int n = -1; )])nd"E try{ gg0rkg oSavedFile.write(b,nStart,nLen); ~mF^t7n] n = nLen; 'c&[ kMR } !1b}M/Wx catch(IOException e) |2Vhj<6 { Y9/`w@"v e.printStackTrace (); @$Xl*WT7 } {4n r* q OXxgnn>W' return n; /3`yaYkSh } QGCg~TV; @~z4GTF9i 6%a9%Is!O } N&uRL_X. &lCOhP# uIy$|N /* Iq0[Kd0.j **SiteInfoBean.java (+CNs */ #0"Pd8@ package NetFox; lC=-1*WH 6`h}#@ ( [59g] ') public class SiteInfoBean { bhl9:`s y$}o{VE{x | |u private String sSiteURL; //Site's URL }Ug O$1 private String sFilePath; //Saved File's Path oO3X>y{gN private String sFileName; //Saved File's Name p)qM{`]G\ private int nSplitter; //Count of Splited Downloading File `t>A~.f Ez/>3:; kt#t-N;}x public SiteInfoBean() xrZzfg {//nSplitter的缺省值为5 /u&7!>, //default value of nSplitter is 5 =o)B1(v@. this("","","",5); H
-K%F_# } FvJkb!5*e_ +gyGA/5:d$ =E$B0^_2RC public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) pkE4"M!3= { #Q1
|] sSiteURL= sURL; YO9ofT sFilePath = sPath; I&%KOe0 sFileName = sName; V2SHF this.nSplitter = nSpiltter; kxLWk%V vd[?73:C M1q_gHA } ydTd.` o3X0c6uU $!vK#8-&{ public String getSSiteURL() #0f6X,3 { d}2(G2z^ return sSiteURL; yf2P6b\ } M2nWvU$ 2@!B;6*8q 4$y P_3 public void setSSiteURL(String value) !A:d9 k { _/J`v`}G sSiteURL = value; P&h]uNu } Ae;mU[MK/ ]G~Z'fs<( -br): }f public String getSFilePath() wg4Ol*y' { )~CNh5z6Y return sFilePath; XE8%t=V!c$ } $>zqCi2tB< PDS?>Jg( 2v<O} public void setSFilePath(String value) y" |gC!V} { %us#p|Ya sFilePath = value; \[d~O>k2 } 6MpV,2:> D?G'1+RIT~ ^vJy< public String getSFileName() 9TZ 6c { @V Sr'?7- return sFileName; (K('@W%\? } AYAbq}'Yt '?6j.ms
M )|GYxG;8C public void setSFileName(String value) r)Ja\; { 8v)iOPmDC sFileName = value; A@eR~Kp
^ } _K B%g_{ kz G W/ #itZ~tol public int getNSplitter() /i{V21(% { }^
=f%EjV return nSplitter; U_RWqKL } 2|&SG3e+(I .vie#,la /CUBs! public void setNSplitter(int nCount) &(m01 { RN$>!b/ nSplitter = nCount; qCB{dp/ } vSY
YetL } S~>R}= et/v/Hvw1 /iL*) /* \}!/z]u **Utility.java j9X|c7| */ !;K zR& package NetFox; 7nsovWp r5y*SoD! Tv9\`F[ public class Utility { tO?-@Qf/9< r[wjE`Z/T @)wsHW%cjz public Utility() [c
XSk { hVl@7B~ >I',%v\?@ w&e3#p } @1 i<=r q7I!wD9Cff //线程睡眠 @<&u;8y-Cn public static void sleep(int nSecond) v3G$9(NE; { pK ^$^*# try{ Y[W :Zhl; Thread.sleep(nSecond); IZGRQmi" } ";/ogFi catch(Exception e) YABi`;R]' { C;%dZ e.printStackTrace (); 2XEE/]^ } ;%k C?Vzi } B*9?mcP\ xdVsbW)L2 //日志 IVVX3RI public static void log(String sMsg) :98:U~d1 { $/ $Hi U`. System.err.println(sMsg); wk{]eD% } ~SmFDg$/m 0{I-x^FI /x4L,UJ= P public static void log(int sMsg) yYP>3]z { +(W7hK4ip System.err.println(sMsg); 0g~Cdp } ,9MNB3 } qz.l Q- w_@~ bR;.KC3C /* sk*vmxClY **TestMethod.java 7-C])9 */ ^8YBW<9 package NetFox; 18p4]:L k3KT':* i g
. public class TestMethod { <;uM/vSi z: {;6a_L@q;| public TestMethod() [)kuu { ///xx/weblogic60b2_win.exe $=`d[04 try{ <_]W1V:0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); LFZ*mRiuKE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); REh\WgV!u SiteFileFetch fileFetch = new SiteFileFetch(bean); &0H_W xKeB fileFetch.start(); L)1\=[Ov } z@ `u$D$n catch(Exception e){e.printStackTrace ();} F/[m.!Eo P,(_y8 b|;h$otC } Pjxj$>&;*j W}%"xy ]N WF_QhKW|k public static void main(String[] args) _Vf>>tuW { cd=K=P}p new TestMethod(); >_ G'o } ruyQ}b:zS } bUds E1f 点击下载更多相关资料
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