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/* z50f$!? **SiteFileFetch.java Nh\y@\F> */ -q/FxESp package NetFox; _yVF+\kQ import java.io.*; +l_$}UN import java.net.*; sR*JU% {1`n^j(> vW4N[ .+ public class SiteFileFetch extends Thread { \Rvsy;7 Bn{0-5nj j<*`?V^ SiteInfoBean siteInfoBean = null; //文件信息Bean 64qQ:D7C long[] nStartPos; //开始位置 Yg14aKZl long[] nEndPos; //结束位置 MEn#MT/Cz FileSplitterFetch[] fileSplitterFetch; //子线程对象 &:)e long nFileLength; //文件长度 J'y*>dW boolean bFirst = true; //是否第一次取文件 @;@Wt`(2a boolean bStop = false; //停止标志 N\dr_ File tmpFile; //文件下载的临时信息 tc<t%]c DataOutputStream output; //输出到文件的输出流 )?PRG= UQ 'U
4q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R|H_F#eVn} public SiteFileFetch(SiteInfoBean bean) throws IOException \:wLUGFl5 { XG}pp`{o siteInfoBean = bean; W'9=st' //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }\/f~?tEh tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7?JcB?G4 if(tmpFile.exists ()) }D eW2Jp {
j>OB<4?.+ bFirst = false; Yhd|1,m9f read_nPos(); 8RR6f98FF } ;]^JUmxU[d else 0,`$ KbV\ { mg^\"GC*8 nStartPos = new long[bean.getNSplitter()]; BV
HO_ nEndPos = new long[bean.getNSplitter()]; JP<Z3
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6 } lCyp&b#(L \W6|un "i_}\p.,X public void run() g#ONtY@*U { F-n1J?4b //获得文件长度 9jwo f}OU //分割文件 H;n(qBSB //实例FileSplitterFetch S[ ,r.+ //启动FileSplitterFetch线程 C&'Y@GE5 //等待子线程返回 {XNu4d9w( try{
8Cr?0Z if(bFirst) q}["Nww- { jTx,5s- nFileLength = getFileSize(); [Pt5c6 L: if(nFileLength == -1) V-w[\u { ynN[N(m# System.err.println("File Length is not known!"); uv[e0,@ } ^$y_~z3o#7 else if(nFileLength == -2) BE}qwP^ { lA<IcW System.err.println("File is not access!"); W$Bx?}x($ } P( W8XC else o;JBe"1 { I
-obfyije for(int i=0;i<nStartPos.length;i++) jjm-%W@ { u[oYVpe)IG nStartPos = (long)(i*(nFileLength/nStartPos.length)); &~Q ?k } JPk3T.qp for(int i=0;i<nEndPos.length-1;i++) C6eo n4Ut { .0q %A1H nEndPos = nStartPos[i+1]; [J+K4o8L<A } "t"=9:_t nEndPos[nEndPos.length-1] = nFileLength; L$x/T3@ } .n`MPx' } k>Qr14F pDlh^?cux 7j&l2Z //启动子线程 <_H0Q_/( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; T+2I:W% for(int i=0;i<nStartPos.length;i++)
)[)-.{q { 4f"a/(>* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]IJ.} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b,G+=&6u nStartPos,nEndPos,i); Bd"7F{H Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6|LDb"Rvy fileSplitterFetch.start(); zq]V6.]J } b\?#O} // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,Ql3RO, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); N[ArwV2O // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", v.v3HB8p nEndPos = " + nFileLength); n@g[VR2t // fileSplitterFetch[nPos.length-1].start(); W^&t8d2 U'.>wjO fp4 d?3G //等待子线程结束 Q;5'I3w //int count = 0; k<W]VS3N //是否结束while循环 ( L RX boolean breakWhile = false; gpr];lgS Dl/UZ@8pl p9_45u`u2 while(!bStop) ASy7")5 { zAB-kE\) write_nPos(); k=bv!T_o Utility.sleep(500); n*iaNaU"' breakWhile = true; 4'9h^C& sS(^7GARa =GM!M@~,Ab for(int i=0;i<nStartPos.length;i++) 3g2t{% { ZLKS4 if(!fileSplitterFetch.bDownOver) <WBGPzVZE {
YQX>)' breakWhile = false; +I\bs.84 break; ?67j+) } |_[mb(<| } uNhAfZ if(breakWhile) -3_kS/ break; eB$v'9S8/ OR"n i [AX).b //count++; #0Oqw=F //if(count>4) pdnL~sv // siteStop(); N'm:V } PLo.q|% bJB:]vs$ =AcbX_[ System.err.println("文件下载结束!"); KS(T%mk\ } sQihyq6U; catch(Exception e){e.printStackTrace ();} YN>#zr+~ } ?QVD)JI*k Cv$TNkP* F/EHU?_EI //获得文件长度 [S</QS! public long getFileSize() <!OP b(g2 { p-KuCobz] int nFileLength = -1; 29Q5s$YD@ try{ R#\8jv v URL url = new URL(siteInfoBean.getSSiteURL()); n{'
[[2U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }.b[a z\T httpConnection.setRequestProperty("User-Agent","NetFox"); H V 6lWO8j^BN i,yK&*>JJ int responseCode=httpConnection.getResponseCode(); $V~%$ if(responseCode>=400) Va*Uwy?x/) { s9[v_(W processErrorCode(responseCode); .=@M>TZM return -2; //-2 represent access is error dqKTF_+VhA } +Qc^A & vLX 3?5
~KxOE( String sHeader; (J^
Tss ":-)mfgGU A<.Q&4jb for(int i=1;;i++) #sqDZ]\B { /{kyjf[o&* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *=|i" //Utility.log(in.readLine()); ^~`8 - TE sHeader=httpConnection.getHeaderFieldKey(i); Cq(Xa- if(sHeader!=null) Y6D=tb { ryn) if(sHeader.equals("Content-Length")) =v;-{oN! { ZA9']u%EJ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); W>DpDrO4ml break; giu~"#0/F } U.^)|IHW } h;ShNU else Bnxzy
n break; ReK@~#hLY } )7i?8XiSZF } s*8hN*A/, catch(IOException e){e.printStackTrace ();} E$ngmm[ catch(Exception e){e.printStackTrace ();} Y\%}VD2k k Lv_P[I f`IgfJN Utility.log(nFileLength); "rKIXy !<YRocQY quKD\hL$ return nFileLength; BO9Z"|" } Zi[)(agAT _ma4 Iiy:<c //保存下载信息(文件指针位置) ynDx'Q* N' private void write_nPos() ,F-tvSc\Q { pz$$K? try{ NqwVsVL output = new DataOutputStream(new FileOutputStream(tmpFile)); [{ { ?e6J output.writeInt(nStartPos.length); KqS2 for(int i=0;i<nStartPos.length;i++) h?ia4t { +I Ze`M%n // output.writeLong(nPos); ~.@fk}'R output.writeLong(fileSplitterFetch.nStartPos); .nSupTyG output.writeLong(fileSplitterFetch.nEndPos); Z956S$gS } Qrt8O7&(' output.close(); iZSSd{jO } XsG]-Cw catch(IOException e){e.printStackTrace ();} _L=vK=, catch(Exception e){e.printStackTrace ();} Ov<3?)ok } xLD6A5n,[ *xl7;s ,X$Avdc2 //读取保存的下载信息(文件指针位置) 6Ss{+MF|v private void read_nPos() }agl:~C { {//F>5~[ try{ 8uGPyH DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ffxk] o&%c int nCount = input.readInt(); LNN:GD)> nStartPos = new long[nCount]; oOL3O@)w> nEndPos = new long[nCount]; Z~,.l
for(int i=0;i<nStartPos.length;i++) kCC9U_dj, { =3zn
Ta } nStartPos = input.readLong(); EIYM0vls( nEndPos = input.readLong(); aW6+Up+G* } b #^aM input.close(); 1`}fbX;"m) } )4`Ml*7x catch(IOException e){e.printStackTrace ();} <zf+Ii1:, catch(Exception e){e.printStackTrace ();} y="SzPl } V%0.%/<#5 rgYuF,BT. nM; G;
T private void processErrorCode(int nErrorCode) 28)TXRr- { b"Mq7&cf System.err.println("Error Code : " + nErrorCode); #VOjnc/rW } *M|\B|A. z8j(SI;3 qE`=^
//停止文件下载 V-cuG. public void siteStop() #pe{:f? { mWusRgj+8 bStop = true; Ad,r(0a LZ for(int i=0;i<nStartPos.length;i++) qbEj\
b[ fileSplitterFetch.splitterStop(); 9V66~Bf5 Ds
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* `Of wl%G } \i,cL)HM } ];I| _fXo% //负责部分文件的抓取 6|KX8\,A@ **FileSplitterFetch.java +_gT|vlU */ p\{+l;` package NetFox; X]yERaJ,i lz)"zV g&Z7h4!\ import java.io.*; Y1 P[^ws import java.net.*; |g7h#F~ i)2))C reA8=>b/ public class FileSplitterFetch extends Thread { `oMeR]~ ya{>= SznE:+ String sURL; //File URL +hg\DqO^M long nStartPos; //File Snippet Start Position [)3 U])w/ long nEndPos; //File Snippet End Position ?fmt@@]T? int nThreadID; //Thread's ID |\a:]SlH boolean bDownOver = false; //Downing is over lkfFAwnc boolean bStop = false; //Stop identical CJ?gjV6 FileAccessI fileAccessI = null; //File Access interface m"G N^V7 "k-ov9yK \B2d(=~4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException O^}v/}d { |mk}@OEf this.sURL = sURL; LO]6Xd" this.nStartPos = nStart; ]|N4 #4 this.nEndPos = nEnd; QklNw6, nThreadID = id; f%{Tu` fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z)
Xs;7 } M_1Tx aEDN]O95? zcB2[eaV public void run() b.4Xn0-M { \5P.C while(nStartPos < nEndPos && !bStop) qu~|d}0 { Fd[h9 G %?f:" Yg)V*%0n try{ M%{?\)s URL url = new URL(sURL); g`OOVaB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -(w~LT$ " httpConnection.setRequestProperty("User-Agent","NetFox"); jBv$^L String sProperty = "bytes="+nStartPos+"-"; 2 1~7{# httpConnection.setRequestProperty("RANGE",sProperty); b%;59^4AjD Utility.log(sProperty); JYd7@Msfc }[z<iij4 v1r_Z($ InputStream input = httpConnection.getInputStream(); )_v\{N //logResponseHead(httpConnection); )@qup _M@ *e<Eu>fW#& fhV0S>*< byte[] b = new byte[1024];
^ MT9n int nRead; ChTXvkdH while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ,iVPcza { ]&:b<]K3 nStartPos += fileAccessI.write(b,0,nRead); nnE_OK!}T //if(nThreadID == 1) FxfL+}?Q // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `<J#l;y } v
(ka,Dk3 irsfJUr[V _;:rkC fj Utility.log("Thread " + nThreadID + " is over!"); 8rwYNb.P bDownOver = true; R|1xXDLm*E //nPos = fileAccessI.write (b,0,nRead); 0HR|aqPo } ck+b/.gw` catch(Exception e){e.printStackTrace ();} qon{
g } tKZ&1E } `\jTpDV_W h.V]f S YN@6}B#1 //打印回应的头信息 ^IGyuj0]jG public void logResponseHead(HttpURLConnection con) @ EmGexLPM { T;!ukGoFP for(int i=1;;i++) ]G0dS
Fh{j { '_qQrP# String header=con.getHeaderFieldKey(i); #+"4&:my if(header!=null) 85D^@{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); q[G/} Utility.log(header+" : "+con.getHeaderField(header)); #%^\\|'z else (`6%og#8 break; B:-U`CHHQ } ] *-;' * } mP pvZ @H\pipT_b tqf&N0*
public void splitterStop() 0||"r&:X { dC`tN5 bStop = true; _1sMY hI } L)F1NuR ]4Y/x i- !:"-:O}>=, } SY,I>-% yI8m%g% o\ngR\> /* xQJIM. **FileAccess.java VLsh=v *//文件访问(定位,写) XDk'2ycv package NetFox; H&X:!xa5 import java.io.*; s=d+GMa {l2N& 84=-Lw public class FileAccessI implements Serializable{ )O3jQ_q= QjA&IZEC
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b~_B
[cf RandomAccessFile oSavedFile; }:`5,b%Y_ long nPos; V+lRi"m?| 1^C|k(t 5YiZ-CQ> public FileAccessI() throws IOException [p ii { 2sKG(^=Z this("",0); .^i<xY } :l+_ja&o z% V* K DVI7]+=nV public FileAccessI(String sName,long nPos) throws IOException ITyzs4"VV { XHs d- oSavedFile = new RandomAccessFile(sName,"rw"); } ^"0T-ua this.nPos = nPos; 1SW4Y oSavedFile.seek(nPos); naz:A } ^7u X$ Kax#OYLpg K@HQrv< public synchronized int write(byte[] b,int nStart,int nLen) \a\= gn { JO2xT#V int n = -1; `=79i$,,t
try{ -!cIesK;< oSavedFile.write(b,nStart,nLen); !!FR[NK n = nLen; 9\v.qo. } ~m=$VDWm catch(IOException e) Z>8eD|m%2 { "B#Y- e.printStackTrace (); A 4j<\xL } 3gpo
% c45tmul bGN
5 4{f return n; OX+hZ<y } 6lsL^]7 *>k!hq;j $A`xhh[ } !.EcP=S )1f+ld%R o/cr{>"N /* c3] C:t+ **SiteInfoBean.java XLm@etf */ I}+;ME|<2 package NetFox; $jG4pPG b3\B8:XFo| (/K5! qh public class SiteInfoBean { D`Gt ^agj4$ H`-=?t private String sSiteURL; //Site's URL WL l_'2h private String sFilePath; //Saved File's Path gg[9u- private String sFileName; //Saved File's Name D`VFf\7 private int nSplitter; //Count of Splited Downloading File Vclr2]eV4O %c X"#+e >,"sHm}l% public SiteInfoBean() ,=|4:F9
{//nSplitter的缺省值为5 `
W4dx& //default value of nSplitter is 5 )11W)G`w this("","","",5); B'}"AC" } KiAcA]0 O8lFx_N7Q )iU^&@[S public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) FXahZW~Ol { Uoji@ sSiteURL= sURL; s<vs:jna sFilePath = sPath; sTkkM9 sFileName = sName; /L&M,OUcr. this.nSplitter = nSpiltter; cy|%sf` SfW}"#L>5 L-\ =J } Mvb':/M )KY:m |Z g9KTn4 public String getSSiteURL() yNa;\UF { ffE#^| return sSiteURL; GK?4@<fY } .9h)bf+ t> .
Fl- z/ 7$NxJH public void setSSiteURL(String value) 3;_
n{& { -(#-I$z sSiteURL = value; mS%4gx~~_n } lb~E0U`\E` iW;i!, 3c #s|qW public String getSFilePath() XE rUS80 { ?Elg?)os return sFilePath; V8PLFt; } "DQ'C%sL9 ^Ga&}- %=Tr^{i public void setSFilePath(String value) ;..o7I { 8W+5)m.tp sFilePath = value; 2)
?q58 } t-7og;^8k p[v#EyoC 9(, @aZ public String getSFileName() sx
9uV { ~R]35Cp-# return sFileName; gfy19c 9 } g"hJ{{< B4g8
~f Br5o7(AE public void setSFileName(String value) ,^$|R32 { ,gx)w^WTm sFileName = value; 3[IJhR[ } #0"~G][# +(?>-3_z U \oy8FZ public int getNSplitter() kV&9`c+ { aeP[+ I9 return nSplitter; cpZc9;@IC } S%mfs!E> jz'< 6bO~/mpWT~ public void setNSplitter(int nCount) a~]bD { x_MJJ(q8g nSplitter = nCount;
CN& } *>q/WLR } sZhMa> aFj.i8+ 4n0xE[- /* /)>S<X **Utility.java cYNV\b4- */ lr@#^ package NetFox; 8g~EL{' q]% T:A= /rc%O*R public class Utility { $m| V :/ v;EQ, NL <a^Oj LLU public Utility() BR5BJX { [A2`]CE<@ (Ddp|a"b .12aUXo( } </"4 zD| $_;e>*+x //线程睡眠 sLL7]m} public static void sleep(int nSecond) /JJw 6[N { n,'OiVl[ try{ h9s >LY Thread.sleep(nSecond); FMw&( } hJ;$A*Y catch(Exception e) B 0ee?VC { Wp0
Dq( e.printStackTrace (); ]j<Bo4~Il } 39i9wrP } ^jE8+h W"q@Qa`Bm //日志 *OjKcs public static void log(String sMsg) An`3Ex[
{ P9Q~r<7n System.err.println(sMsg); !CTxVLl"F } J([s5:.[ Z|lU8`'5 s1N?/>lmB public static void log(int sMsg) t=
#&fSR { =EP13J System.err.println(sMsg); K=::)/{P } U(>4s]O6 } 6IcNZ!j98 cre;P5^E J3RB]O_ /* <O<LYN+( **TestMethod.java hfWFD, */ `>C<}xO package NetFox; Jju#iwb r=uN9ro o{qr!*_3 public class TestMethod { [Nm4sI11 g|X ;ahTT friWW^ public TestMethod() 1c4/}3* { ///xx/weblogic60b2_win.exe DOS0;^f try{ 0|4%4Mt SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); [lzN !!B! //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); d*8 $>GA SiteFileFetch fileFetch = new SiteFileFetch(bean); <xpph
t< fileFetch.start();
mEG6 } S[3iA~)Z- catch(Exception e){e.printStackTrace ();} XN=67f$Hw &)wiKh"$ I=)hWC/ } 2&mGT&HAVA 6RO(]5wX C$h<Wt=< public static void main(String[] args) yOU(2"8p { |077Sf| new TestMethod(); 3rW|kkn } 'NjzgZ~]P } 7,qYV} 点击下载更多相关资料
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