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/* _S#3!Wx **SiteFileFetch.java SQVyCxcX_ */ #_OrS/H package NetFox; <D M:YWNa import java.io.*; Q|J$R import java.net.*; qw%wyj7 _LSf
) 2(sq*!tX public class SiteFileFetch extends Thread { #~88[i-6 '@+a]kCMev S~LTLv:> SiteInfoBean siteInfoBean = null; //文件信息Bean dy*CDRU4 long[] nStartPos; //开始位置 k%?A=h long[] nEndPos; //结束位置 $3MYr5
FileSplitterFetch[] fileSplitterFetch; //子线程对象 q!zsGf{ long nFileLength; //文件长度 b:}+l;e52 boolean bFirst = true; //是否第一次取文件 ;X3bgA'] boolean bStop = false; //停止标志 DN;An0
{MK File tmpFile; //文件下载的临时信息 (t)a u DataOutputStream output; //输出到文件的输出流 gkyv[ bfjtNF*^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?rn#S8nNx< public SiteFileFetch(SiteInfoBean bean) throws IOException ?]L:j { ^yB>0/{)z siteInfoBean = bean; C6C7*ks //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _mw(~r8R tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =-qv[;%&6 if(tmpFile.exists ()) %v(\;&@ { Ug^v
]B9 bFirst = false; G}b LWA read_nPos(); [!E8 C9Q#! } bJE$> else `cgSyRD] { a~F`{(Q2 nStartPos = new long[bean.getNSplitter()]; A[6$'IJ nEndPos = new long[bean.getNSplitter()]; wz P")}[0 } pPdOwK# :!f1|h 8HyK;+ZkVd /#M|V6n } `_;VD?")*l kOGpe'bV 7QlA/iKqK public void run() 3' WS6B+ { b)A$lP%` //获得文件长度 l%^'K%'b //分割文件 r$*p //实例FileSplitterFetch <,Zk9 t& //启动FileSplitterFetch线程 5"[Qs|VjA6 //等待子线程返回 " (+># try{ Q
b5AQf30 if(bFirst) [lsr[`SJ< { uL!{xuN nFileLength = getFileSize(); LV&tu7c if(nFileLength == -1) ^zv28Wq> { [Uezi1I System.err.println("File Length is not known!"); dOFxzk,g&R } @^vVou_ else if(nFileLength == -2) tF)aNtX4^ { =^P<D&%q System.err.println("File is not access!"); iaq0\d.[7 } 1(Kd/%]{ else h!f7/)|[o { =S-'*F for(int i=0;i<nStartPos.length;i++) eA>O<Z1> { ?<Dinq nStartPos = (long)(i*(nFileLength/nStartPos.length)); w $7*za2 } ?Ee HeN_ for(int i=0;i<nEndPos.length-1;i++) E#_TX3B { 'Z-jj2t} nEndPos = nStartPos[i+1]; Gt[!q\^? } aIk%$M at nEndPos[nEndPos.length-1] = nFileLength; iuq-M?1 } S5'BXE, } ;h3uMUCml un[Z$moN" im_W0tGvF //启动子线程 +GWeu0b(~ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; j]6j!.1 for(int i=0;i<nStartPos.length;i++) NrTQ}_3) { RaAi9b[/S fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >U9* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), z@$7T:H> nStartPos,nEndPos,i); jGEUl=W
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l?B\TA^ fileSplitterFetch.start(); jjkiic+tDN } _ 9Tv*@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $CO^dFf siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); dapQ5JT/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }}Eko7'^ nEndPos = " + nFileLength); H.j(hc' // fileSplitterFetch[nPos.length-1].start(); :h N* rU5gQq; jGd{*4{3+ //等待子线程结束 G6Z2[Ej1 //int count = 0; S(Xab_DT)H //是否结束while循环 f>5{SoM boolean breakWhile = false; m"~$JA u cxrUk$f 5FnWlFc while(!bStop) 4W~pAruwr { ld4QhZia write_nPos(); S[{#AX=0 Utility.sleep(500); ju(&v*KA breakWhile = true; J(h=@cw IC/'<%k yEy}
PCJ& for(int i=0;i<nStartPos.length;i++) Ta%{Wa\U9z { L\5j"]
}` if(!fileSplitterFetch.bDownOver) ^x4I { _UYt breakWhile = false;
s<xD$K~rM break; WsQo+Ua } `pE~M05 } f$NudG!S if(breakWhile) G{i}z^n break; !t{3IE 6?Rm>+2>v EMmNlj6 //count++; fnG&29x //if(count>4) ,+KZn}> // siteStop(); pcv (P } Z'>Xn^ ( N~[sf?& SY["dcx+ System.err.println("文件下载结束!"); k ;R*mg*K } c</d1x T catch(Exception e){e.printStackTrace ();} {%'(IJ|5z } /,f*IdB ce/Rzid +iir]"8 //获得文件长度 `B"=\0 public long getFileSize() v-3In\T=^ { AiykIER/ int nFileLength = -1; }>=k!l{ try{ bBc<yaN URL url = new URL(siteInfoBean.getSSiteURL()); t]#y}V HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @>_`g= httpConnection.setRequestProperty("User-Agent","NetFox"); `$jc=ZLm aIpDf|~ G)';ucs:, int responseCode=httpConnection.getResponseCode(); &7!&]kA+ if(responseCode>=400) u{,e8. Z { L@2T processErrorCode(responseCode); p[VBeO^% return -2; //-2 represent access is error V{p*N* } 'xm _oGWE ~z$vF 57Q^"sl String sHeader; ".O+";wk \]e"#"v}}_ +u#;k!B/> for(int i=1;;i++) D'F=v\P { p [4/Nq,c //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ^\Nsx)Y; //Utility.log(in.readLine()); w?d~c*4+ sHeader=httpConnection.getHeaderFieldKey(i); 5 e~\o}] if(sHeader!=null) hn#i,XnY { N W :_)1 if(sHeader.equals("Content-Length")) UB }n= { Mp^%.m nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8bLA6qmM\ break; "jH=O(37 } X}Bo[YoY$ } 7"Sw))H| else d!5C$C/x break; NJ^`vWi } w>>)3:Ytd } `=g9Rg/< catch(IOException e){e.printStackTrace ();} S#Tc{@e catch(Exception e){e.printStackTrace ();} K9B_o, G.OAzA13!t `[p*qsp_ Utility.log(nFileLength); 9>\P]: q{5wx8_U {L5!_]6 return nFileLength; (xf_ } r63_|~JVB<
DvCs 5 G=W!$(: //保存下载信息(文件指针位置) sgp5b$2T. private void write_nPos() j/`-x { e>vV8a\ try{ +e?mKLw14 output = new DataOutputStream(new FileOutputStream(tmpFile)); eR PmN output.writeInt(nStartPos.length); p%toD{$ for(int i=0;i<nStartPos.length;i++) 8d|omqe~P { *{8<4CVv // output.writeLong(nPos); bCr) 3, output.writeLong(fileSplitterFetch.nStartPos); _xT=AF9~o output.writeLong(fileSplitterFetch.nEndPos); S*-n%D0q5 } k~Qb"6n2 output.close(); 7\m.xWX e } DG,CL8bv catch(IOException e){e.printStackTrace ();} kY*3)KCp catch(Exception e){e.printStackTrace ();} ,S5tkTa } M24FuS V9[-# Ti
k>y68_ //读取保存的下载信息(文件指针位置) =r=[e}&9 private void read_nPos() Pz#D9.D0 { {j
i;~9'Q try{ c6FKpdn% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "~jSG7h int nCount = input.readInt(); 0`.3`Mk nStartPos = new long[nCount]; F4'g}yOLd nEndPos = new long[nCount]; v'nM= for(int i=0;i<nStartPos.length;i++) ]H<5]({F { &$F4/2|b% nStartPos = input.readLong(); `##qf@M
nEndPos = input.readLong(); ~nJcHJ1nb4 } SQ!wq input.close(); ,RIGV[u } Q;{[U!\: catch(IOException e){e.printStackTrace ();} gZ%wmY catch(Exception e){e.printStackTrace ();} ,_;+H*H>" } l^aG"")TH. `X[L62D m8'B7|s private void processErrorCode(int nErrorCode) I{Hl2?CnI, { y3l3XLI*b System.err.println("Error Code : " + nErrorCode); i(P/=B
} ?O(KmDH 4|*b{Ni t
I}@1 //停止文件下载 Ah:! public void siteStop() ?z3c$} { &Fo)ea bStop = true; ,4W|e! for(int i=0;i<nStartPos.length;i++) dYEF,\Z' fileSplitterFetch.splitterStop(); .BN~9w N!Dc\d=8q] B;Pws$J } %\6ns } P'f0KZL; //负责部分文件的抓取 ~XAtt\WS
**FileSplitterFetch.java *V+6409m */ ]-h$CJSY package NetFox; ^.bYLF bB^% O^: sute%6yM import java.io.*; ^Q!qJav import java.net.*; )6mx\t wq&|V [pMJ9
d$ public class FileSplitterFetch extends Thread { xbJ@ z{ Wy^43g38'p w5*?P4P String sURL; //File URL P<P4*cOV long nStartPos; //File Snippet Start Position )zw}+z3st long nEndPos; //File Snippet End Position B.w ihJVDg int nThreadID; //Thread's ID V_Z ~$ boolean bDownOver = false; //Downing is over }p-<+sFo boolean bStop = false; //Stop identical Mda~@)7$ FileAccessI fileAccessI = null; //File Access interface @Dc?fyY*o< \2cbZQx jP'.a. ^o$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wI'8B{[ { yNp l0 d this.sURL = sURL; 3/a$oO this.nStartPos = nStart; Co6ghH7T this.nEndPos = nEnd; weQC9e~d{- nThreadID = id; J u5<wjQR\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 >C""T`5] } XVXiiQ^
BLxtS gQy{OU public void run() x`N_tWZ { jR~2mf!h*e while(nStartPos < nEndPos && !bStop) e*5TZ7. { QuFcc}{<] 'G1~\CT nLK%5C try{ jxA`RSY URL url = new URL(sURL); O8BxXa@5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <3\t J httpConnection.setRequestProperty("User-Agent","NetFox"); $47cKit|k: String sProperty = "bytes="+nStartPos+"-"; \(UEjlo httpConnection.setRequestProperty("RANGE",sProperty); GCx1lm Utility.log(sProperty); Jp)>Wd n]&/?6} ow :}NI InputStream input = httpConnection.getInputStream(); F@Bh>Vb //logResponseHead(httpConnection); d ; (&_; s_Y1rD*B `jY*0{ byte[] b = new byte[1024]; yjCY2T E int nRead; 9G(.=aOj, while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Hb&-pR@e\? { `_{'qqRhe nStartPos += fileAccessI.write(b,0,nRead); 3md yY\+& //if(nThreadID == 1) P;jl!o$ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E<]l]? } ?>47!):-* #"|Y"#@k arf`%9M Utility.log("Thread " + nThreadID + " is over!"); {E!"^^0` bDownOver = true; 1M&n=s
_ //nPos = fileAccessI.write (b,0,nRead); a&YD4DQ05 } }>:v catch(Exception e){e.printStackTrace ();} _2{i}L } .S/W_R } dP0!?J Y
/|] %0B :CEhc7gU //打印回应的头信息 >W2Z]V
public void logResponseHead(HttpURLConnection con) G
hH0-g{- { e*gCc7zz for(int i=1;;i++) 9TGjcZ1S' { Qxj &IX String header=con.getHeaderFieldKey(i); u?[P@_i< if(header!=null) ,6rg00wGE //responseHeaders.put(header,httpConnection.getHeaderField(header)); kM>0>fkjE Utility.log(header+" : "+con.getHeaderField(header)); I^ W else @DK,ka( break; [.tqgU } \ ?['pB } (mXV5IM ,2u-<8 & i|x2;
v public void splitterStop() 4)Y=)#= { W2h^ShG bStop = true; 061@N=p8 } nIVPh99 btb-MSkO V.J[Uwf } d#7 z
N ji{V# b\~rL,7( /* qA:CV(Z **FileAccess.java . (*V|&n *//文件访问(定位,写) K V^` package NetFox; m;o \.s import java.io.*; *=}$@OS Gad!}dz Y}(#kqh> public class FileAccessI implements Serializable{ ]5D?Sc#- _5#f9,m1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ]t_AXKd RandomAccessFile oSavedFile; (_-<3)q4 long nPos; 'LIJpk3J Q%~b(4E^7P {>>ozB. public FileAccessI() throws IOException y6Xfddd61 { M9*7r\hqYV this("",0); <x DD*u } ^.jIus5 PIP2(-{ai l<)(iU public FileAccessI(String sName,long nPos) throws IOException ]od]S8$5 { g':mM*j& oSavedFile = new RandomAccessFile(sName,"rw"); P7d" E this.nPos = nPos; 4lC:svF oSavedFile.seek(nPos); zllY$V&<! } l){l*~5zl2 7~TE=t t6_6Bl: public synchronized int write(byte[] b,int nStart,int nLen) 1g{`1[.QO { 0rY<CV;fZ int n = -1; 9ZUG~d7_ try{ JE,R[` & oSavedFile.write(b,nStart,nLen); E,E:W uB n = nLen; D8slSX`6j } O-:#Q(H! catch(IOException e) yJ8WYQQMG { nab:y(]$/ e.printStackTrace (); j y{T=Nb } x,
a[ p\1 95^w" [}4Q h";G vjy return n; A- IpE } Jis{k$4 YMLo~j4J 1eI>Yy>} } *\m
53mb AS`0.RC- Hk8:7"4Q /* F6Z l#eL **SiteInfoBean.java MGX %U6 */ NS6Bi3~ package NetFox; -QCo]:cp S(mJ;C j#y_# public class SiteInfoBean { t*y4)I !gR HY9H?T kvv-f9/- private String sSiteURL; //Site's URL z~+_sTu private String sFilePath; //Saved File's Path r]Da4G^ private String sFileName; //Saved File's Name qrO]t\ private int nSplitter; //Count of Splited Downloading File b,/fz6
{N ^"K yAR''> public SiteInfoBean() 0}hN/2}& {//nSplitter的缺省值为5 fm87?RgXD //default value of nSplitter is 5 3G8BYP this("","","",5); DzO0V"+H}k } E*>tFw&[ D<5)i)J" h=YY>
x public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) i68'|4o { $4'I3{$ sSiteURL= sURL; 5.F.mUO sFilePath = sPath; @no]*?Gpa sFileName = sName; %m!o#y(hD` this.nSplitter = nSpiltter; h1G]w/.ws b|n%l5
1 }b2U o&][ } -w=rNlj *_b4j.)ax, b*qkox;j public String getSSiteURL() % ~J90a { lF5;Kc return sSiteURL; v<_}Br2I[ } I:uxj% F}<&@ 7kF <<LmO-92 public void setSSiteURL(String value) n_AW0i. { Y1+4ppZ sSiteURL = value; ygS*))7
r } $$<9tqA SG
|!wH^ Crh5^? public String getSFilePath() ~ygiKsD6b { [=u8$5/a return sFilePath; Q#urx^aw } JM -Tp!C> "v/^nH )FT~gl% public void setSFilePath(String value) 5H:NY| { -]~U_J] sFilePath = value; >pO[S[ } j\q1b:pE wd~e3%JM EK_NN<So# public String getSFileName() TgJx% { %MU<S9k return sFileName; 1sYwFr 5 } X&MO} ,f0cy\.? \K`AO{ D@ public void setSFileName(String value) p*_g0_^ { HGfYL')Z sFileName = value; +VDwDJ)lG } dP
T)& f|WNPFQ$x JVwYV5-O<0 public int getNSplitter() E0\ ' { qc|;qPj return nSplitter; E,shTh%&~ } \yNjsG@, y7wy9+>l i|Lir{vW public void setNSplitter(int nCount) rl'YyO}2 { :IV4]` nSplitter = nCount; {a `kPfP } :m_0WT } :RzcK>Gub= 5ap}(bO Y~dRvt0_w /* )M#~/~^f+ **Utility.java <d#9d.< */ }C"EkT!F package NetFox; 60[f- 0X 8xDSeXh; jkQv cU public class Utility { &.an- )AXTi4MNp ;T/W7=4CZ public Utility() 8II-'%S6q { -0YS$v%au> 0@C`QW%m g % q7 } 8? W\kf$ !9356) cV //线程睡眠 6aK'%K public static void sleep(int nSecond) !ceuljd] { LDBxw try{ [
8N1tZ{` Thread.sleep(nSecond); "}*P9-% } jeN_
sm81b catch(Exception e) ?CA P8 _ { w:r0> e.printStackTrace (); SLSJn))@! } L q'*B9 } x@m"[u ZL #4X*zT //日志 \ s`'3y public static void log(String sMsg) G2ZF`WQ { %N|7<n<S System.err.println(sMsg); }%| (G[ } yb*SD! E+dr\Xhv DvF`KHsy public static void log(int sMsg) .r[DqC { szF[LRb System.err.println(sMsg); %.pX!jL } (=CV")tF } *^=`HE89S llhJ,wD (nbqL+ /* 6NZ3( **TestMethod.java qdCa]n!d */ '-D-H}%;}M package NetFox; X4BDl pJ6bX4QnDX WUQ2[)< public class TestMethod { 1FjA ]r$S{< Nj %!N public TestMethod() w)&] k#r { ///xx/weblogic60b2_win.exe |D$U{5}Mv try{ 58mzh82+ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); KG'4;Z5J //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !Lb9KDk SiteFileFetch fileFetch = new SiteFileFetch(bean); Kk!D|NKLC fileFetch.start(); r444s8Y } J*.Nf)i catch(Exception e){e.printStackTrace ();}
tU!"CX Dgc[WsCEW i'L7t!f}o }
M)Yu^ 3_J9SwtN |5V#&e\ES public static void main(String[] args) +"?K00*( { jsf=S{^2 new TestMethod(); Z]1~9:7ap } rMTtPuc2 } Cl\Vk 点击下载更多相关资料
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