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/* :}~B;s0M\ **SiteFileFetch.java FJ
V!B& */ ,a@jg&Mb] package NetFox; T oK'Pd import java.io.*; .^FdO$" import java.net.*; oAq<ag\qV a.G;s2> 0bI}
s`sr public class SiteFileFetch extends Thread { CDDOm8 ]n&Eb88 d7!, SiteInfoBean siteInfoBean = null; //文件信息Bean #s]` jdc long[] nStartPos; //开始位置 {$qLMx'; long[] nEndPos; //结束位置 +m1y#|08 FileSplitterFetch[] fileSplitterFetch; //子线程对象 v^Pjvv = long nFileLength; //文件长度 MN. $a9m boolean bFirst = true; //是否第一次取文件 r|0wIpi6Q boolean bStop = false; //停止标志 :"~n`
Q2[ File tmpFile; //文件下载的临时信息 =bl6: DataOutputStream output; //输出到文件的输出流 &6#Ft]6~ {P
$sQv //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5>"X?U}He public SiteFileFetch(SiteInfoBean bean) throws IOException KIHr% { ^@AIXBe siteInfoBean = bean; 8al%F_r] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0X4%Ccs tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); [<A|\d'x if(tmpFile.exists ()) 2VA mL7) { 4A~1Z,"%v( bFirst = false; DH{^9HK read_nPos(); ycSC'R } .KzU7 else |$.`4h? { GUdVsZjz( nStartPos = new long[bean.getNSplitter()]; Jz6zJKcA nEndPos = new long[bean.getNSplitter()]; v?qU/ } Pa\"l'!>^ .7M:AS> {G4{4D } yM*f}S/
( } B|6_4ry0U QwgP+ M+ 72{Ce7J4 public void run() DmpG35Jk { hy{1 Ea/T //获得文件长度 7!%xJ! //分割文件 w>Y!5RnO //实例FileSplitterFetch &Uu8wFbIJ //启动FileSplitterFetch线程 :7jDgqn^|i //等待子线程返回 DE _<LN
try{ h}cR>
if(bFirst) =^S1+B
MY- { w{5v*SHl}` nFileLength = getFileSize(); KO5! (vi@ if(nFileLength == -1) 3zuYN-; { Q"=$.M~ System.err.println("File Length is not known!"); a!Ht81gj } 7,&M6<~ else if(nFileLength == -2) { x/~gp { SdQ"S-H System.err.println("File is not access!"); rq_0"A } [,As;a*o else r*XEne { i*ErxWzu for(int i=0;i<nStartPos.length;i++) 68-2EWq { g6~B|?! nStartPos = (long)(i*(nFileLength/nStartPos.length)); 'n4$dv%q } -"MB(` for(int i=0;i<nEndPos.length-1;i++) }0z]sYI { t}q\. nEndPos = nStartPos[i+1]; 9L9+zs3k } On4tK\l@ nEndPos[nEndPos.length-1] = nFileLength; TIre,s)_ } 2u?k;"]V } eY#_!{*Wn
X6<%SJC ( ,!G$~Sy //启动子线程 vv5 u U8 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; OX[pK_:`l for(int i=0;i<nStartPos.length;i++) $~FnBD%|{ { "-aCF fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pGdo:L? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ( !=^ (Nd nStartPos,nEndPos,i); z}&JapJ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MclW!CmJ fileSplitterFetch.start(); $PE{}`#g } pZaOd;t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nb ,+!)+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); %AnqT|\#, // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1aBQ.-E- nEndPos = " + nFileLength); "[tb-$ER // fileSplitterFetch[nPos.length-1].start(); &D*22R4{CX %1^E;n 0\2#(^ //等待子线程结束 IMtfi(Y%F //int count = 0; "D1u2>( //是否结束while循环 i]M:ntB" boolean breakWhile = false; *
j]"I=D 2GC{+* 9qXKHro while(!bStop) }Z Nyd { ]p5]n*0X write_nPos(); h1+lVAQbT Utility.sleep(500); E[kf%\
breakWhile = true; (Y>|P pRrokYM
d wseb]=U for(int i=0;i<nStartPos.length;i++) k1HVvMD< { dD.;P=AP if(!fileSplitterFetch.bDownOver) "Q< { E\lel4ai breakWhile = false; b]cnTR2E break; Z/~7N9?m( } cH>3|B*y } YR/%0^M'0 if(breakWhile) 6h%_\I.Z[[ break; /_.1f|{B ?f'iS#XL mX&!/U //count++; vS'l@`Eg] //if(count>4) t`oH7)nut // siteStop(); q@0g KC&U } *j"u~ NF FQW{c3%qZ *p Q'w System.err.println("文件下载结束!"); Vnvfu!>( } vE<z0l catch(Exception e){e.printStackTrace ();} GZCX m+ }
0V[`zOO(o #$;i 4a ll8Zo+-[ //获得文件长度
L$Yg*]\ public long getFileSize() CS|al(?~ { %|\Af>o4d int nFileLength = -1; |p\vH#6y+ try{ O\&-3#e URL url = new URL(siteInfoBean.getSSiteURL()); ' zz^!@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %Z]c[V. httpConnection.setRequestProperty("User-Agent","NetFox"); b"7L
;J5| PRQEk.C 6#za\[ int responseCode=httpConnection.getResponseCode(); yHNx,ra if(responseCode>=400) )g
; !IL { o`+$h:zm@ processErrorCode(responseCode); _KZ&/ return -2; //-2 represent access is error wJ Qm7n-+ } h5^qo ^;g7 FBGe s[, k=M_2T' String sHeader; QuWWa|g^. lNs;-`I~ >pRC$'Usx for(int i=1;;i++) f<;w1sM\ { -lqsFaW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); {;-wXzv` //Utility.log(in.readLine()); >^N{ sHeader=httpConnection.getHeaderFieldKey(i); &8xwR if(sHeader!=null) 3<R8_p { lGZf_X)gA^ if(sHeader.equals("Content-Length")) V(c>1xLlz { =%Z5"]; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); b<E+5;u break; Z;M th# } c]]e( } r~q3nIe/, else $LOwuvu> break; AJ"a } KMll8X } }|u>b!7_. catch(IOException e){e.printStackTrace ();} vp|'Yy(9z catch(Exception e){e.printStackTrace ();} h#JX$9 67D{^K"KT Ahf71YP Utility.log(nFileLength); >_'0 s I3,0vnE@ rm?C_ return nFileLength; UVlh7w jg } %yPjPUHy Jk>!I\ G<:gNWXd\ //保存下载信息(文件指针位置) `)WC|= w2 private void write_nPos() M7gb3gw6 { *F;W 1TF try{ f[fH1cu&` output = new DataOutputStream(new FileOutputStream(tmpFile)); Kv~'*A)d output.writeInt(nStartPos.length); Ls6C*<8 for(int i=0;i<nStartPos.length;i++) ;>*Pwz`~jT { ,Z$!:U // output.writeLong(nPos); Y5z5LG4 output.writeLong(fileSplitterFetch.nStartPos); /mG-g%gE output.writeLong(fileSplitterFetch.nEndPos); u?7^+z } G<M9 6V output.close(); u8r<B4k } B]#^&89wG) catch(IOException e){e.printStackTrace ();} F_d>@-< catch(Exception e){e.printStackTrace ();} WG]`Sy } q{CD:I:- iBh.&K{j AkAQ%)6qV //读取保存的下载信息(文件指针位置) u2
t=*<X private void read_nPos() RaC8Sq7hW { *4OB
88$ try{ h$l`)AH^ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); T%]@R4z#q int nCount = input.readInt(); L}= t"y nStartPos = new long[nCount]; 6`WI
S4 nEndPos = new long[nCount]; Mi)h<lY for(int i=0;i<nStartPos.length;i++) BT^HlW< { y&L Lx[8^ nStartPos = input.readLong(); Fk`|?pQm nEndPos = input.readLong(); a3J'
c } `MC5_SG 1 input.close(); 3<O=,F } jp880} catch(IOException e){e.printStackTrace ();} Rrw6\iO catch(Exception e){e.printStackTrace ();} 8DkZ@} } o3cE.YUF PS$g*x 0iI|eE o private void processErrorCode(int nErrorCode) M3!4,_!~ { 'l $ViNq; System.err.println("Error Code : " + nErrorCode); '37 <+N } 'OI(MuSn UK5u"@T aNUMF //停止文件下载 h{ T{3 public void siteStop() Vl/fkd,Z { 3FG'A[x3O bStop = true; hdDL92JVg for(int i=0;i<nStartPos.length;i++) V;d<S@$ fileSplitterFetch.splitterStop(); Y?AvcY. \ 0/m$V. 3?Fe(!@ } -unQ4G } %m##i //负责部分文件的抓取 $6]1T> **FileSplitterFetch.java _0o65?F */
[L=M=;{4 package NetFox; @k9n 0Qe|F z:oi@q n{(,r' import java.io.*; #'4Psz import java.net.*; !.{"Ttn;s 7QdboEa _'Rg7zHTp- public class FileSplitterFetch extends Thread { -ND1+`yD -_BX\iP{ cq~~a(IS String sURL; //File URL 2oo\ SmO] long nStartPos; //File Snippet Start Position >02p,W6S> long nEndPos; //File Snippet End Position yp]z@SYA@ int nThreadID; //Thread's ID J"K(nKXO_? boolean bDownOver = false; //Downing is over U>0bgL boolean bStop = false; //Stop identical y*!8[wASHq FileAccessI fileAccessI = null; //File Access interface l
p|`n qNWSDZQ 5a|{ytP public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException S5\KI+;PW { f h:wmc' this.sURL = sURL; nh? JiH
{ this.nStartPos = nStart; X*M2 O%g`L this.nEndPos = nEnd; {Ga=;0 nThreadID = id; nd"$gi fileAccessI = new FileAccessI(sName,nStartPos);//定位 VNwOD-b/] } P6A##z qwq5yt? Fg0!2MKq* public void run() d^8n { NInZ~4: while(nStartPos < nEndPos && !bStop) :xk+`` T { r-No\u_ piFZu/~Gq\ gF:|j( try{ U+[h^M$U URL url = new URL(sURL); j>G|Xv HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5|Oj\L{ httpConnection.setRequestProperty("User-Agent","NetFox"); f^lhdZ\ String sProperty = "bytes="+nStartPos+"-"; ~9#'s' httpConnection.setRequestProperty("RANGE",sProperty); q4g)/x%nc Utility.log(sProperty); K%UjPzPWw XB]>Z) 6Zx5^f(qd InputStream input = httpConnection.getInputStream(); dEkAUH //logResponseHead(httpConnection); #u3E{NB HGF&'@dn vXg^K}a# byte[] b = new byte[1024]; vj|#M/3> int nRead; qL5~Wr m-W while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 3`;1;T2$B { (9b%'@A@m nStartPos += fileAccessI.write(b,0,nRead); T^q^JOC4 //if(nThreadID == 1) c4.2o<(Xt // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {s{+MbD } )hC3'B/[Y e/x6{~ju^N T.W^L'L` Utility.log("Thread " + nThreadID + " is over!"); UG3}|\.u bDownOver = true; ^].U?t.n) //nPos = fileAccessI.write (b,0,nRead); D^6Q`o } jp|*kBDq\ catch(Exception e){e.printStackTrace ();} 4I#@xm8) } qMw_`dC } In8{7&iVO 9CAu0N5< :KqSMuKR //打印回应的头信息 <sSH^J4QqX public void logResponseHead(HttpURLConnection con)
Tj}%G { .>S1do+ for(int i=1;;i++) J>"qeR
/ { +
Y!:@d String header=con.getHeaderFieldKey(i); s^m`qi(H if(header!=null) !x!1H5" //responseHeaders.put(header,httpConnection.getHeaderField(header)); 5s@xpWVot Utility.log(header+" : "+con.getHeaderField(header)); sRZ?Ilua6 else FL b break; g _0| `Sm } G
@EEh.s9 } v`S ;.iD r;p@T8k o#WECs> public void splitterStop() M(I%QD { 0sH~H[ap bStop = true; smn~p/u } MI-S}Qoe 6Hfv'X5E`Z V+r&Z<& } |T]&8Q)S q=*bcDu pfw`<*e' /* /1_O5'5+v **FileAccess.java wPq9`9 # *//文件访问(定位,写) .hUlI3z9 package NetFox; ,3!TyQ\m' import java.io.*; %Y,Ru)5} 8l'W[6 *3s-=.U~ public class FileAccessI implements Serializable{ VVcli* g yegdky3 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ryqu2>(
RandomAccessFile oSavedFile; qJ2Z5 long nPos; X_!km-{ h50]%tp\ w03Ur4>T public FileAccessI() throws IOException Tu}EAr { =\)zb '\=d this("",0); };P=|t(r } rxy5Nrue b-@9Xjv 1.8"N&s public FileAccessI(String sName,long nPos) throws IOException %8Y+Df;ax { 69:-c@L0 oSavedFile = new RandomAccessFile(sName,"rw"); ~g#/q~UE this.nPos = nPos; suWO:]FR oSavedFile.seek(nPos); fY78 } HSU?4=Q SfY9PNck\ %FqQ+0^ public synchronized int write(byte[] b,int nStart,int nLen) t"J{qfNs {
H4YA int n = -1; >X:!Y[N try{ grkA2%N oSavedFile.write(b,nStart,nLen); z"7X.*] n = nLen; &IRM<A!8 } 8gt*`]I catch(IOException e) R/E6n &R { ZpBP#Y* e.printStackTrace (); %`lJA W[ } DaGny0|BB _.]mES| pAA)?/&oKV return n; KC(z TY } .EjR<UU )^6Os2
{;u+? uY } (w(k*b/ AkO);4A;Jd :Zob"*T /* 6<5:m:KE **SiteInfoBean.java ln,9v */ X+,0;% p package NetFox; v&]yzl ~>0H
k}Hv i tk/1 public class SiteInfoBean { ?0JNaf [^/a`Kda8 2_M+o]Z^ private String sSiteURL; //Site's URL }o[<1+W(. private String sFilePath; //Saved File's Path q j9q private String sFileName; //Saved File's Name 61gyx6v private int nSplitter; //Count of Splited Downloading File DYgB_Iak uT<<G)v) 9^Web~yi# public SiteInfoBean() MI:%Eq {//nSplitter的缺省值为5 C#)T$wl[E //default value of nSplitter is 5
yn<J>e this("","","",5); j]R[;8g } TVSCjI Ux= B*m1@{ a+~b3 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gnxD'1_ { r[GH#vF;7 sSiteURL= sURL; :kwDa
a sFilePath = sPath; IQ-l%x[fue sFileName = sName; #O8=M(- V this.nSplitter = nSpiltter; 15' fU! 9!Xp+< Cp>y<C" } }ALli0n`V) = iDd{$ cc}#-HKR[ public String getSSiteURL() 9zCuVUcd$. { 1Qz@ return sSiteURL; D~M R)z_p~ } T:|p[Xbo hy$VG%b;# f4+wP/n& public void setSSiteURL(String value) ?gvu
E1 { aX|(%1r sSiteURL = value; (FgX9SV]p9 } MpJ<. |h q6>} aU[!*n 4Ux public String getSFilePath() rwgj] { ^L7!lzyo return sFilePath; &1`Y&x:p } H/;AlN|! <$25kb R5K e+VE FWz public void setSFilePath(String value) h9iQn<lp4. { 5tZ0zr sFilePath = value; \$ss } 8_S| 8RW( .j**>&7L elpTak@ public String getSFileName() 3=} P l, { {{gt>"D, return sFileName; T-/3
A%v } FCKyKn bz~aj}"` [/ertB public void setSFileName(String value) y}|E) { aD_7^8> sFileName = value; a1%}Ee } 8IBr#+0 ib!TXWq A:yql`&s public int getNSplitter() (pd~ 2!;C { &%qDi_UD return nSplitter; Tm7LaM } MEp{v|1 x7`+T1IJ 9$C?)XKXB public void setNSplitter(int nCount) X')l04P@% {
8Djki] nSplitter = nCount; DQ[7p( } d&f!\n_~ } VEn3b vX}w_Jj> <8Nr;96IA /* 8pftc) k **Utility.java
_VmXs&4 */ gG}H5uN package NetFox; M7 kWJ a)Pr&9I ;Bzx}7A public class Utility { }&2,!;"">3 6iF&!Fd>J ki/Cpfq40* public Utility() O|^J;fS: { >kmgYWG eO*s,* RO%M9LISI } !y'>sAf Ht\2 IP //线程睡眠 .]JIo&>5 public static void sleep(int nSecond) T{"Ur:p { n~}[/ly try{ k)X\z@I' Thread.sleep(nSecond); U,61 3G } nKnrh]hX catch(Exception e) eMmNQRmH { #d/T7c# e.printStackTrace (); ~UNha/nt } "+wkruC } S?C.: iF837ng5 //日志 op9vz[o#4 public static void log(String sMsg) .QwB7+V4 { I.T?A9Z System.err.println(sMsg); v-q-CI?B# } z9g6%RbwX fiD,HGx
i B$x@I\(M public static void log(int sMsg) i'"#{4I { ZZTf/s* System.err.println(sMsg); ]FIIs58IM } ~K<h~TNP } ,r]H+vWS g;6/P2w B, H9EX /* D_ ~;!^ **TestMethod.java CmBgay */ >P\eHR,{- package NetFox; c_M[>#` jWi~Q o+ gTOx|bx public class TestMethod { &NoA, `|7 WWZ<[[ > (FaYagD public TestMethod() =s]2?m { ///xx/weblogic60b2_win.exe bM:4i1Z try{ {#4a}:3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); H>;,r, //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 7Hgn/b[?b SiteFileFetch fileFetch = new SiteFileFetch(bean); rwP)TJh" fileFetch.start(); [)GRP } -$0}rfX catch(Exception e){e.printStackTrace ();} ?~t5>PEonv ?E|=eO"I1 !X~NL+ } 7iwck.* dh [kx l5&5VC) public static void main(String[] args) fR'!p: ~ { bn8maYUZ new TestMethod(); |)Dm.)/0) } i$@xb_ } D6&P9e_5 点击下载更多相关资料
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