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/* MA
.;=T **SiteFileFetch.java \, R; */ #X Q/y} ( package NetFox; gL<n?FG4b import java.io.*; qu B[S)2} import java.net.*; 5 -i,Tx&: !h?HfpYv ~J\qkQ
public class SiteFileFetch extends Thread { _8G
w Mj bBIh}aDN G'|ql5Zw SiteInfoBean siteInfoBean = null; //文件信息Bean ^\}MG!l long[] nStartPos; //开始位置 |E+.y&0; long[] nEndPos; //结束位置 ZRMim6a4X FileSplitterFetch[] fileSplitterFetch; //子线程对象 vQ rxx long nFileLength; //文件长度 FJ_JaIby boolean bFirst = true; //是否第一次取文件 B=A!hXNa boolean bStop = false; //停止标志 St5;X&Q File tmpFile; //文件下载的临时信息 wFMH\a DataOutputStream output; //输出到文件的输出流 ERPg TZT #]h
X."b2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) APu$t$dmm public SiteFileFetch(SiteInfoBean bean) throws IOException -YNpHd/;, { i(~DhXz*T siteInfoBean = bean; #j2kT //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); k>&cHCS`* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =.`\V] if(tmpFile.exists ()) o z*;q] { RV~t%Sw^ bFirst = false; m6R/, read_nPos(); =3-=p&* } E/cV59 else ^E}?YgNp { h,/Aq nStartPos = new long[bean.getNSplitter()]; ?:r?K|Ku nEndPos = new long[bean.getNSplitter()]; =lAjQt } IfmQPs+f L{/%
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b) } BX/3{5Y>{ /&Q{B f IiE6i43 public void run() E#!N8fQ { 2^[dy>[y0 //获得文件长度 V$ZclV2:Ih //分割文件 @c^ Dl //实例FileSplitterFetch l"ms:v //启动FileSplitterFetch线程 fd[N]I3 //等待子线程返回 `W86]ut[ try{ 1(p:dqGS if(bFirst) ///Lg{ie { !.P||$x`& nFileLength = getFileSize(); A}ZZQ if(nFileLength == -1) xn*$Ty+ { <,CrE5Pl System.err.println("File Length is not known!"); W>#yXg9 } iC3z5_g*@ else if(nFileLength == -2) TuQGF$n@ { #@FA=p[% System.err.println("File is not access!"); ?tYZ/ }
ZiUb+;JA else 0&s6PS% { sD3ZZcy|= for(int i=0;i<nStartPos.length;i++) 1(DiV#epG {
GK/Po51 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ZVgfrvZP } jn^X{R\ for(int i=0;i<nEndPos.length-1;i++) d?7?tL2 { @v2<T1UC nEndPos = nStartPos[i+1]; s| p I` } gsL=_#
? nEndPos[nEndPos.length-1] = nFileLength; 2 GRI<M } nJe}U# } -leX|U}k _v&fIo ,4'gj0 //启动子线程 4]r_K2.cc fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; *I 1 H for(int i=0;i<nStartPos.length;i++) >[ B.y { wqo:gW_ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wsmgkg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), aDdxR: nStartPos,nEndPos,i); &Ym):pc Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WJq>%<# fileSplitterFetch.start(); t^'nh
1= } 2u$-(JfoS // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "'CvB0> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); IHTimT? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a/ Ac^!( nEndPos = " + nFileLength); Dck/Ea // fileSplitterFetch[nPos.length-1].start(); z_>~=Mm >W> rhxU YF{MXK} //等待子线程结束 "L2*RX.R //int count = 0; `4*I1WZW //是否结束while循环 S1$^ _S
= boolean breakWhile = false; ?("O.< hF$`=hE,F~ 4o#]hB';ni while(!bStop) [S'1OR$FQ\ { ehW [LRtq write_nPos(); J2qsZ Utility.sleep(500); &>qUT]w breakWhile = true; SRfh{u kQ>2W5o-d- llZU: bs for(int i=0;i<nStartPos.length;i++) `ArUoYbB { yx8G9SO? if(!fileSplitterFetch.bDownOver) Lip#uuuXXN { Rs=Fcvl breakWhile = false; UC+Qn break; I<2`wL= } nZioFE} } O: :FB.k if(breakWhile) 44e]sT.B break; <.)=CK 2BC!,e$Z &6\&McmkX //count++; 2mEqfy //if(count>4) THwM',6 // siteStop(); N[
=I } [h-6;.e bkJ bnW= |V5BL<4 System.err.println("文件下载结束!"); +c_AAMe } )>ML7y catch(Exception e){e.printStackTrace ();} FJ84'T\~ } 3X(^`lAf) :Ak^M~6a5 :Pq&l. //获得文件长度 c^= q(V public long getFileSize() 8
o}5QOW { k1D7=&i int nFileLength = -1; bZ_&AfcB try{ vGyQ306 URL url = new URL(siteInfoBean.getSSiteURL()); 4>(K~v5;N HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); a >fA-@ httpConnection.setRequestProperty("User-Agent","NetFox"); .45wwouZkc
Z kw-a c&T5C,] int responseCode=httpConnection.getResponseCode(); MNs<yQ9I' if(responseCode>=400) ai;!Q%B#Q { l]|&j`'O processErrorCode(responseCode); bpsyO>lx/ return -2; //-2 represent access is error G5qsnTxUJ } Lx-%y'P :fmV||Q MLr L"I" String sHeader; .g/!u(iy O5du3[2x7a m LajiZ Bf for(int i=1;;i++) o2(w { AkW,Fp1e //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ANPG3^w //Utility.log(in.readLine()); :G#%+, sHeader=httpConnection.getHeaderFieldKey(i); Y#lAG@$ if(sHeader!=null) X)SUFhP\ { eQQVfEvS if(sHeader.equals("Content-Length")) 8GxT! { Oi?Q^ISxP nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 3R/6/+S- break; ~^.,Ftkb@7 } {Q/@ Y.~< } 08:K9zr else yHM29fEZk break; x/1FQ>n:9 } cMi9 Z] } 5 n 4/}s catch(IOException e){e.printStackTrace ();} 07^.Z[(pCt catch(Exception e){e.printStackTrace ();} M(8xwo-W 4`~OxL ,dba:D=l Utility.log(nFileLength); ruqE]Hx9( ]Q^8
9? ])pX)(a return nFileLength; lU|ltnU } 6Hc25NuQZ 7#
'j>] aJm5`az) //保存下载信息(文件指针位置) R GV{KL private void write_nPos() N+SA$wG { [9?]|4 try{ iP7KM*ks output = new DataOutputStream(new FileOutputStream(tmpFile)); PvUY
Q>Kw output.writeInt(nStartPos.length); Bptt" for(int i=0;i<nStartPos.length;i++) Ypm*or { b<fN,U<k // output.writeLong(nPos); 9F,XjPK= output.writeLong(fileSplitterFetch.nStartPos); yMNOjs'c { output.writeLong(fileSplitterFetch.nEndPos); j+<!4 0# } 1slt[&4N output.close(); Y\!:/h]E& } m$Tt y[0 catch(IOException e){e.printStackTrace ();} /XRgsF catch(Exception e){e.printStackTrace ();} ^umHuAAE } Ahd{f! M]\"]H? R U[ //读取保存的下载信息(文件指针位置) &m(eMX0lU private void read_nPos() 5NSXSR9c { ziW[qH { try{ 2b
{Y1* DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); EI9Yv>7 d{ int nCount = input.readInt(); yyR@kOGga nStartPos = new long[nCount]; uJ*|SSN~ nEndPos = new long[nCount]; r'}#usB( for(int i=0;i<nStartPos.length;i++) bv[*jr;45 { _}Gs9sHr0K nStartPos = input.readLong(); RAyR&p nEndPos = input.readLong(); 7Ph+Vs+h } `Geq, input.close(); d\z':d.Tt } 43J8PMY catch(IOException e){e.printStackTrace ();} {iq{<;)U?U catch(Exception e){e.printStackTrace ();} p|Fhh\,*`X } G`!;RX uuhvd h= 8DrKq]& private void processErrorCode(int nErrorCode) (aCl*vV1 { J! eVw\6 System.err.println("Error Code : " + nErrorCode); nfvs"B; } I^A01\p S67T:ARS FH H2 //停止文件下载 = &aD!nTx public void siteStop() .+AO3~Dg { ldoN!J bStop = true; ~w%Z Bp for(int i=0;i<nStartPos.length;i++) =TI|uD6T fileSplitterFetch.splitterStop(); eWx6$_| VA'< b OmM~pD } o9HDxS$~^ } Ll&5#q //负责部分文件的抓取 7]9s_13] **FileSplitterFetch.java -ap;Ul? */ e;}5~dSi package NetFox; >Q\H1|? ELNA-ZKp WU,72g= import java.io.*; Zr2QeLQC( import java.net.*; FkECY B
9]sSx !r!Mq~X<= public class FileSplitterFetch extends Thread { 4_I,wG@ )@`w^\E_~_ TbU9
<mY String sURL; //File URL _5YL !v& long nStartPos; //File Snippet Start Position lB\j>.c long nEndPos; //File Snippet End Position $l[*Y int nThreadID; //Thread's ID LveqG boolean bDownOver = false; //Downing is over +Vf|YLbhJ boolean bStop = false; //Stop identical S(-=I!.G{ FileAccessI fileAccessI = null; //File Access interface iii$)4V M[*:=C)H 't_=%^q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c!\y\r { $BBfsaJPT this.sURL = sURL; /s*>V@Q this.nStartPos = nStart; .y2<2eW this.nEndPos = nEnd; x}>tX nThreadID = id; u!`C:C' fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]R>k0X.V } b~1p.J4 IKr7"` !<6wrOMa O public void run() +m7x>ie) { 6$dm-BI while(nStartPos < nEndPos && !bStop) $-AvH(@ { >`\*{] OB^2NL~Q~ *wF:Q;_<z try{ g4$%)0x% URL url = new URL(sURL); Zz&i0r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &s;%(c04A httpConnection.setRequestProperty("User-Agent","NetFox");
pn7 :")Zx String sProperty = "bytes="+nStartPos+"-"; A>g$[ httpConnection.setRequestProperty("RANGE",sProperty); |uZ=S]V@ Utility.log(sProperty); tr/dd&(Y1 J+|ohA q@-qA] InputStream input = httpConnection.getInputStream(); 7VXeu+-P //logResponseHead(httpConnection); 835Upj> CGe'z lM1!2d'P byte[] b = new byte[1024]; R39R$\ int nRead; 5)oIPHXw while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) B:r-')!0$# { g^4FzJ nStartPos += fileAccessI.write(b,0,nRead); =U2Te //if(nThreadID == 1) .}<B*e=y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9iy|= } @
:4Kk
4g1 pNJM]-D]m~ .-Lqo=o\ Utility.log("Thread " + nThreadID + " is over!");
n1/lE) bDownOver = true; Wkk Nyg, //nPos = fileAccessI.write (b,0,nRead); 1;gSf.naG } 2!otVz!Mh catch(Exception e){e.printStackTrace ();} ,<
icW&a } uWInx6p } QPcB_wUqu >oNk(.
% Z%{f[|h9} //打印回应的头信息 '> Q$5R1 public void logResponseHead(HttpURLConnection con) U
^9oc& { .>'Z9.Xnk for(int i=1;;i++) 9h(hx7] { ?BZ][~n-Q String header=con.getHeaderFieldKey(i); %Nn'p" if(header!=null) !m|%4/
M@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); LI<5;oE; Utility.log(header+" : "+con.getHeaderField(header)); w;$+7 else qU
n> break; ui{_w @o } {LD8ie|x1` } KTEis!w VT7NWTJ, "'#Hh&Us public void splitterStop() tp^'W7E { _D4}[` bStop = true; S%fBt?-Cm } 7dJaWD:& B~#@fIL y)E2=JQA/ } ) :@%xoF5 :GYv9OG s-V$N /* ,AM-cwwT:u **FileAccess.java eFI4(Y *//文件访问(定位,写) \(FDR package NetFox; _64@zdL+ import java.io.*; -JENY|6 B^?XE(. Sh6Cw4 R public class FileAccessI implements Serializable{ *~uuCLv_ { bn#:75r //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !?*!"S-Sl RandomAccessFile oSavedFile; 3@?YTez# long nPos; $@kw>2 F8Wq&X#r 1[`<JCFClc public FileAccessI() throws IOException c7IR06E { |u;PU`^-z this("",0); %Ab_PAw } se HbwO3 b iGMONJRO gu[dw3L public FileAccessI(String sName,long nPos) throws IOException yo,!u\^x { & }}WP:U oSavedFile = new RandomAccessFile(sName,"rw"); lh_zZ!)g this.nPos = nPos; ?\M6P?tpo& oSavedFile.seek(nPos); zpqNmxmF } # :w2Hf6Q QJM!Wx+ 5qSZ>DZ public synchronized int write(byte[] b,int nStart,int nLen) 9nS! { %:?QE
; int n = -1; )6
<byO try{ a&"*UJk<? oSavedFile.write(b,nStart,nLen); _l= n = nLen; ](:FW '- } S)@vl^3ec catch(IOException e) S{T d/1} { /t)c fFM e.printStackTrace (); DF|s,J`98 } zn1Rou]6 ]\,uF8gg) {FY[|:Cp return n; =e8L7_; } M.N~fSJ gam#6
s cNlY=L } SuH.lCF-g A{x
7 QsJW"4d /* v#]v,C-* **SiteInfoBean.java i6#]$ B */ D>b5Uwt package NetFox; 56SS
>b _pko]F|() apD=>O public class SiteInfoBean { +VLe'| ]ZzG!7 @U3foL2\ private String sSiteURL; //Site's URL ,o@~OTja* private String sFilePath; //Saved File's Path =ch
Af= private String sFileName; //Saved File's Name m_!vIUOz private int nSplitter; //Count of Splited Downloading File yC 7Vb
P 3E!<p vo6[2.HS public SiteInfoBean() g2{H^YUN$_ {//nSplitter的缺省值为5 (21 W6 //default value of nSplitter is 5 YP#AB]2\} this("","","",5); u2-@?yt } Ly)(_Tp@+ GtM(
Y De
nt? public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gJ3OK !/ { _h1 HuL sSiteURL= sURL; J(EaE2 sFilePath = sPath; ewAH'H]o sFileName = sName; /}nrF4S this.nSplitter = nSpiltter; uqa4&2(I=j fEj9R@u+h ,zN3? /7 } X$- boe? 'z-;* !A}j NDRW public String getSSiteURL() v;fJM5PA { ,ykPQzO return sSiteURL; &R'w-0k_ } fwi};)K B0)`wsb_ % QPWw~}: public void setSSiteURL(String value) DIG0:)4R. { dU ,)TKQ sSiteURL = value; ha|@ Xp } kRN|TDx( ShWHHU(QQ /lLov. public String getSFilePath() TsaW5ho<p { 7_Ba3+9jpa return sFilePath; 1
[Sv } *.m{jgi1X L289'Gzg \}$*}gW[} public void setSFilePath(String value) 8%o~4u3 { jDlA<1 sFilePath = value; x7"z(rKl } /[a|DUoHO
bKk CW -6rf( ER public String getSFileName() j|VXC(6P, { !uWxRpT,7 return sFileName; Md8(`@`o } ^Sy^+=wK3
?. zu2 2X|CuL{] public void setSFileName(String value) 2?GXkPF2;A { a(8>n
Z,V sFileName = value;
<1aa~duT } R{*_1cyW 9;=q=O/ Ur^YG4( public int getNSplitter() C/F@ ]_y
{ L)q`D2|' return nSplitter; 6#<Ir @z } c}\
'x5:o {bN Y 6 -]>]Hr- public void setNSplitter(int nCount) QT#b>xV)1 { y0,Ft/D nSplitter = nCount; x.I][(} } kr^0% A } G9\EZ\x! '.pgXsC:=? xb%/sz(4 /* Ay2b,q **Utility.java uu}'i\Q */ 8{oZi]ob package NetFox; F4Rr26M );=Q] > S#,+Z7 public class Utility { 9*' &5F= 5)w4)K-% $u:<x public Utility() $nj\\,(g { V]Sgx00; ^D>fis ]* 0(-@ } 19'5Re& _0K.Fk*(! //线程睡眠 f6Ml[!aU public static void sleep(int nSecond) (}G!np { Ddb-@YD&+0 try{ ?fV?|ZGZI Thread.sleep(nSecond); {o( *
f } F"I*-!o catch(Exception e) y>`5Kyj3-@ { }7%9}2}Iw e.printStackTrace (); E-^2"j>o } 2SYKe$e } EOhC6>ATh [O\9 9> //日志 "9w}dQ public static void log(String sMsg) &I%IaNco { avg4K*v v System.err.println(sMsg); ^ESUMXb } `g--QR \6{LR& +s ULo public static void log(int sMsg) #G[t X6gU { ^+wk System.err.println(sMsg); "TfI+QgLF } <KX&zi<L) } i0\)%H:z %yfE7UPS] Y3k[~A7X /* e gI&epN **TestMethod.java 19p8B& */ uxb:^d?D! package NetFox; :5jexz."M B X*69 pl|h>4af public class TestMethod { 9p4y>3 X &D{5~qC NEw$q4 public TestMethod() ~cIl$b { ///xx/weblogic60b2_win.exe "kU] try{ BKay*!'PX SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~ltg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); gX^ PSsp SiteFileFetch fileFetch = new SiteFileFetch(bean); %&h c"7/k fileFetch.start(); q6REh;$ } Z5$fE7ba+ catch(Exception e){e.printStackTrace ();} zW5C1:.3K pM9yOY tb,9a!? } P#MK 6Hk="$6K ~>g+2]Bn>$ public static void main(String[] args) 7\X$7 { {~_Y _- new TestMethod(); Bd&`Xfebj } VO_dA4C}z } FqZgdmwR 点击下载更多相关资料
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