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/* :<bhQY **SiteFileFetch.java MUsF */ 9a=>gEF],@ package NetFox; f^*Yqa import java.io.*; NtM ?Jh import java.net.*; Zj-U^6^L iNfAn& =+K?@;? public class SiteFileFetch extends Thread { kW2DKr-[ i}zz!dJTE u8.Tu7~ SiteInfoBean siteInfoBean = null; //文件信息Bean N&p0Emg long[] nStartPos; //开始位置 TE$6=; long[] nEndPos; //结束位置 Z1I.f"XY FileSplitterFetch[] fileSplitterFetch; //子线程对象 j'U1lEZm2 long nFileLength; //文件长度 _tX=xAO9 boolean bFirst = true; //是否第一次取文件 4ryG_p52l boolean bStop = false; //停止标志 q4Wr$T$gs= File tmpFile; //文件下载的临时信息 n[gE[kw DataOutputStream output; //输出到文件的输出流 $pAJ$0=sw ye=4<b_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /hu>MZ(\ public SiteFileFetch(SiteInfoBean bean) throws IOException ~v;+-*t { CEI"p2 siteInfoBean = bean; lH`TF_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~G@YA8} tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^~-YS-.J#, if(tmpFile.exists ()) tm5)x^7 { >h\u[I$7 bFirst = false; " (O3B read_nPos(); _qf39fM;\ } !CX WoM else (m,H 5 { X*@ tp,t nStartPos = new long[bean.getNSplitter()]; 0&|0l>wy. nEndPos = new long[bean.getNSplitter()]; ?R#$
c] } KS93v9| yD7} vs=q<Uw) D0xQXC3$` } ciN\SA ZY O#ZZ PJ" GW;%~qH[, public void run() vio>P-2Eho { eIalcBY //获得文件长度 ^_|kEvk0 //分割文件 B8T$< //实例FileSplitterFetch .>F4s_6l //启动FileSplitterFetch线程 )S%t)} //等待子线程返回 =oSd M2 try{ 6 Ln~b <I if(bFirst) *PnO$q@` { 0?>(H(D^/ nFileLength = getFileSize(); w'(/dr if(nFileLength == -1) UTyV6~ { 9% T"W System.err.println("File Length is not known!"); vHpw?(] } \OVtvJV] else if(nFileLength == -2) j0mN4Ny { NUltuM System.err.println("File is not access!"); ZAgXz{!H( } &R<aRE:+R else 7:u+cv { 50N4J for(int i=0;i<nStartPos.length;i++) tn'Jkwp { U*$P"sS` nStartPos = (long)(i*(nFileLength/nStartPos.length)); qXW\/NT"p< } H\ejW@<;h for(int i=0;i<nEndPos.length-1;i++) 6^]| { zg<-%r'$ nEndPos = nStartPos[i+1]; fx_#3=bXi } |^1U<'oM# nEndPos[nEndPos.length-1] = nFileLength; 8J(j}</>a } g;63$_< } w_56y8Pd4 8~o']B;lJ eA4:]A" //启动子线程 W%g*sc*+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; vAUt~X" for(int i=0;i<nStartPos.length;i++) SO0\d0?u { >s{I@#9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), f)/Z7*Z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C:J;'[,S nStartPos,nEndPos,i); Z;.-UXat Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :*''ci fileSplitterFetch.start(); }]vUr}Els } =#G
2}8mQD // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), e,p"=/!aY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); r<+C,h;aww // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", o]e,5] nEndPos = " + nFileLength); &n k)F< // fileSplitterFetch[nPos.length-1].start(); !2LX+*; Ht
Fr(g\"$ !,Uo{@E)Y //等待子线程结束
7=6:ZSI //int count = 0; b&z#ZY //是否结束while循环 JY0aE boolean breakWhile = false; `>:5[Y
?.?)5
&4 b{A[\ " while(!bStop) \]tBwa { v/`D0g-uX) write_nPos(); ob.<j Utility.sleep(500); B@,r8)D breakWhile = true; r<`:Q] rQjk
) O0Cz n for(int i=0;i<nStartPos.length;i++) cbzA`b'Mg { E=s h^Q(A if(!fileSplitterFetch.bDownOver) ;.>*O
oe& { \<LCp;- K breakWhile = false; \QvGkcDc{ break; sl' 4AK~\ } Qd}n4KF\ } Y <6|z3 if(breakWhile) 7~h3B< break; %F*9D3^h ]>n{~4a dN{At- //count++; HsCL%$k //if(count>4) b;i*}4h! // siteStop(); -^@FZR^Y } "Lp.*o xWLvx'8W Za|7gt];l System.err.println("文件下载结束!"); V}E['fzBFV } 5aQ)qUgAW catch(Exception e){e.printStackTrace ();} Xb_
V\b0 } yzS]FwW7 Y+-yIMt$r U2VEFm6 //获得文件长度 46?z*~*G public long getFileSize() #7uH>\r { VUP|j/qD int nFileLength = -1; *p{p.%Qs: try{ BtJkvg(2] URL url = new URL(siteInfoBean.getSSiteURL()); P;5)Net1X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }z]d] httpConnection.setRequestProperty("User-Agent","NetFox"); )vtbA=RH? 9{pT)(Wnb RoqkT|#$ int responseCode=httpConnection.getResponseCode(); mR0`wrt if(responseCode>=400) vl (``5{ { (Jq m9 processErrorCode(responseCode); 6i/unwe!`) return -2; //-2 represent access is error *l7 `C) } d?oXz| ;H( !'$*Z( [}L?EM String sHeader;
Dl!0Hl rJ/HIda \`k=9{R. for(int i=1;;i++) '(K4@[3t { HNkOPz+d&8 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); :(q4y-o6 //Utility.log(in.readLine()); J.iz%8 sHeader=httpConnection.getHeaderFieldKey(i); Uw4iWcC if(sHeader!=null) 0Gu77& { [n9l[dN if(sHeader.equals("Content-Length")) C:1(<1K { @3n!5XM{EE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2I:P}! break; sI\NX$M } ;(K/O?nrJ } 3[#^$_96b else Bo:epus}\ break; % )V=)l.j } F6vsU:TfB } -#%M,Qb catch(IOException e){e.printStackTrace ();} :V(C+bm * catch(Exception e){e.printStackTrace ();} }w)}=WmD I=DVMG| Ry[7PLn] Utility.log(nFileLength); 2dz)rjdO, x|Uwk=;X|s A8ViJ return nFileLength; H[w';u[% } /
0$!. 5CnNp?.t^ @o[ZJ4>* //保存下载信息(文件指针位置) W,8Uu1X = private void write_nPos() x`?>j$ { &NF$_*\E try{ gwNZ`_Q output = new DataOutputStream(new FileOutputStream(tmpFile)); |i
B# output.writeInt(nStartPos.length); fFEB#l!oUb for(int i=0;i<nStartPos.length;i++) *X3wf`C? { w[a(I}x // output.writeLong(nPos); U:x;4 output.writeLong(fileSplitterFetch.nStartPos); Xcfd]29 output.writeLong(fileSplitterFetch.nEndPos); wv3*o10_w8 } q%d,E1 output.close(); ebEI%8p g } "E<+idoz catch(IOException e){e.printStackTrace ();} \e'Vsy>q catch(Exception e){e.printStackTrace ();} nK< v } zw'%n+5m V+D <626o it{Jd\/hR //读取保存的下载信息(文件指针位置) {'alA private void read_nPos() ftmPdha%+ { nh7_
jEX try{ UvMkL DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _zbIS&4 int nCount = input.readInt(); ,J 2qLH1 nStartPos = new long[nCount]; NPv.7, nEndPos = new long[nCount]; w\[l4|g` for(int i=0;i<nStartPos.length;i++) ?9?A)?O<j~ { 7oZ Pb nStartPos = input.readLong(); z\FBN=54z nEndPos = input.readLong(); 4'3;{k$z } {1=|H$wKg input.close(); %4`
U' j } O\uIIuy catch(IOException e){e.printStackTrace ();} {tYY
_BI< catch(Exception e){e.printStackTrace ();} $S>bcsAy } *Mg@j;+5s ).HA#!SE qu#xc0? private void processErrorCode(int nErrorCode) m*1 { {a\! 1~ System.err.println("Error Code : " + nErrorCode); ,ye[TQ\,M } VJ
h]j( m|B)A"Sm }>y!I5O //停止文件下载 YeT{<9p public void siteStop() K%`]HW@I{ { C ]B P}MY< bStop = true; qh W]Wd"g for(int i=0;i<nStartPos.length;i++) b
IxH0=f fileSplitterFetch.splitterStop(); P )oNNY6} Y(aUB$" #Rfcp! } #|+4 `Gf^ } tf54EIy5Y //负责部分文件的抓取 Q"NZE **FileSplitterFetch.java f.j<VKF} */ A
?tna6W: package NetFox; A|K=>7n]U h$sOJs~6h GwXhn2 import java.io.*; "]2^O import java.net.*; JXRU9`3)A u,:hT]
~+ GL>YJ% public class FileSplitterFetch extends Thread { Yx,E5}- zC:Pg4=w] =mX26l`B String sURL; //File URL nT01B1/<] long nStartPos; //File Snippet Start Position %hmRh~/& long nEndPos; //File Snippet End Position A#K<5%U{Mv int nThreadID; //Thread's ID J9t?;3 boolean bDownOver = false; //Downing is over 1D)0\#>< boolean bStop = false; //Stop identical hMz)l\0
FileAccessI fileAccessI = null; //File Access interface `z q+Xl z{
M2tLNb ' A+L
# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
PPy~dp { YH+(N this.sURL = sURL; Uu*iL< ` this.nStartPos = nStart; &Qv HjjQ?u this.nEndPos = nEnd; K 0o F=| nThreadID = id; xR$T/] / fileAccessI = new FileAccessI(sName,nStartPos);//定位 f`;w@gR`= } [f {qb\ X}]A_G x'?p?u~[ public void run() SAitufS { "~.4z,ha while(nStartPos < nEndPos && !bStop) Yh^8
! { RiAMW|M"C $"(
15U 0=U|7%dOL try{ $8(QBZq URL url = new URL(sURL); a_0I)'
? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )l!
/7WKY httpConnection.setRequestProperty("User-Agent","NetFox"); u^MRKLn String sProperty = "bytes="+nStartPos+"-"; 0#=xUk#LP` httpConnection.setRequestProperty("RANGE",sProperty); 7f
k)a Utility.log(sProperty); ~a4Y8r ex`T9j.=B pl[@U<8aw InputStream input = httpConnection.getInputStream(); F
=*4]O //logResponseHead(httpConnection); }%PK %/ zI S"?fa)~ |ssl0/nk byte[] b = new byte[1024]; IUEpE9_ int nRead; #^]vhnbN while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _OjZ>j<B. { .Mb0++% W nStartPos += fileAccessI.write(b,0,nRead); ){)-}M //if(nThreadID == 1) =Yl ea,S // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YL!{oHs4 } '
=5B smQl^
6a Nr]Fh Utility.log("Thread " + nThreadID + " is over!"); Sx
J0Y8#z bDownOver = true; oj{CNa //nPos = fileAccessI.write (b,0,nRead); \1<|X].jNY } __7}4mA catch(Exception e){e.printStackTrace ();} cNwHY
Z' } ~@6l7H6{ } ?aWVfX!+G5 EFx>Hu/[G 'nM4t //打印回应的头信息 Ye$j43b public void logResponseHead(HttpURLConnection con) sCt)Yp+8}B { <FU?^*~ for(int i=1;;i++) <)!,$]S { <"K*O9nst String header=con.getHeaderFieldKey(i); *U%3[6hm if(header!=null) H#V&5|K% //responseHeaders.put(header,httpConnection.getHeaderField(header)); >EFWevT{ Utility.log(header+" : "+con.getHeaderField(header)); p[xGL }
+\ else yZ[g2*1L break; N>*+Wg$Ne } U/kQw rM } _A!Fp0}` <},JWV3 6|B9kh} public void splitterStop() 1,)
yEeHjU { >w7KOVbN3
bStop = true; ^<-r57pz } @q>Hl`a M!i|,S \5! 7zPc } NZ i3U ToPjBvD "OwVCym? /* a,S;JF)v **FileAccess.java <>{m+=gA *//文件访问(定位,写) MYjc6@=cR package NetFox; (?t}S.>g import java.io.*; +e2:?d@ 7M7Ir\d0lp A&Aj!# public class FileAccessI implements Serializable{ S :}"gwFM &*7KQd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9NU0K2S RandomAccessFile oSavedFile; Kw?3joy long nPos; /u.ZvY3, -j]k^ jMTM:~0N public FileAccessI() throws IOException /N_:npbJF { LOi}\O8 this("",0); wxc#)W } I-r+1gty wz69Yw7 OrM1eP"I public FileAccessI(String sName,long nPos) throws IOException 54z.@BJhE { J@$~q}iG oSavedFile = new RandomAccessFile(sName,"rw"); !*"fWahv this.nPos = nPos; B T"R"w oSavedFile.seek(nPos); +ppA..1 } a=j'G]= u)<s*jk -c0ypz public synchronized int write(byte[] b,int nStart,int nLen) 7>j~;p{ { {LF4_9 = int n = -1; CKK}Z;~: try{ ]r|oNGD)G oSavedFile.write(b,nStart,nLen); :[_msd n = nLen; 1
rhZlmf[r } "t.`/4R2w catch(IOException e) q{Z#}|km# { < z2wt e.printStackTrace (); A)C)5W } @lE'D":? /
}$n_N\!) |0=UZK7%O return n; ,n8\y9{G } sNo8o1Hby i}DS+~8v [A,^F0:h } @pYEzizP7 rT/r"vr PZusYeV8b /* *l+Dbm,u **SiteInfoBean.java + tMf&BZ */ \$wkr package NetFox; 0Z8"f_GK E(PBV 8\lh'8 public class SiteInfoBean { ciS, =zyA~}M2 BtC*]WB"_' private String sSiteURL; //Site's URL R03 Te gwA private String sFilePath; //Saved File's Path DaQl ip private String sFileName; //Saved File's Name R);Hd1G private int nSplitter; //Count of Splited Downloading File ~bhS$*t64 LjBIRV7 be,Rj,- public SiteInfoBean() 3J+2#ML {//nSplitter的缺省值为5
@;bBc //default value of nSplitter is 5 >SK:b/i this("","","",5); (6S'wb } +1y$#~dl ]A3 t+8e?=" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) \c:$eF { '*b]$5*p sSiteURL= sURL; h<LFTYE@ sFilePath = sPath; =+!l8o&o, sFileName = sName; 3OZPy|".ax this.nSplitter = nSpiltter; K] (*l"'U5 1g{Pe`G, C}RO'_Pq } 2]5{Xmmo9 XnQR(r)pR2 W#p7M[ public String getSSiteURL() -[=eVS.2% { CBEf;Ig return sSiteURL; r0XEB,} } 2jFuF71 u
S1O-Q> }xk(aM_ public void setSSiteURL(String value) 3#>W\_FY*D { oBkhb sSiteURL = value; p%3z*2,( } At iUTA
!@=S,Vc. $8=|<vt public String getSFilePath() } a9Ah:.7/ { R c+olJ^5 return sFilePath; T-en|. } ^viabkf C V\;Xa0 _B0(1(M<2 public void setSFilePath(String value) \wK&wRn) { f"ndLX:'} sFilePath = value; q!ZM Wg } {]T?) !Vm @Vre)OrN# 0<uek public String getSFileName() Ek_5% n { hIJtu;}zU return sFileName; }5;4'l8 } >rCD5#DG {o}U"b<+Ra y|5L%,i public void setSFileName(String value) I=y7$+7% { ><<>4(eF p sFileName = value; @NL cO} } 9n&
&`r ?b;2PH" $Nu{c;7" public int getNSplitter() F8f}PV]b { .[Sis<A]% return nSplitter; 1M]=Nv } w4U,7%V
y{%0[x*N<m s#9q3JV0 public void setNSplitter(int nCount) 3p0v { MCKN.f%lP nSplitter = nCount; g#J`7n } PI9,*rOy } UM oj9/- }L\;W:0 $UR:j8C{p$ /* ^_WR) F'K **Utility.java hNN>Pd~; */ EeW
,-I package NetFox; -S'KxC !5`MiH .-d'*$
yJ public class Utility { xXe3E& 1BSd9Ydj B9maz"lJ public Utility() XO+BZB`F { M/N8bIC! Q vO}r(kNJ PG&t~4QM` } _~<sb,W e"E8BU //线程睡眠 $.PRav public static void sleep(int nSecond) RM;a]g* { g#5R||r try{ }"D;?$R! Thread.sleep(nSecond); ?I}RX~Tgg } G:AA>t catch(Exception e) 5\Q Tm; { p*;!5;OUR e.printStackTrace (); 'nCVjO7o } AV5={KK } [wGj?M} %K6veB{M //日志 c1#0o)q*7 public static void log(String sMsg) Xw?DN*`L { nK>CPqB^( System.err.println(sMsg); YX$(Sc3.6 } '+88UFSq5 $ev+0m_ Bqf(6\)F public static void log(int sMsg) w*F[[*j@. { CX|W$b)% System.err.println(sMsg); zI`I
Q } J"`VA_[ } @<\oM]jX (GJtTp~2C4 k@4N7} /* U=Ps# **TestMethod.java .j]tzX */ j4$nr=d.6 package NetFox; PLCm\Oh$l GA^hev ? i{?Q, public class TestMethod { R"B{IWQi .5|[gBK >?$2`I public TestMethod() s scbf { ///xx/weblogic60b2_win.exe 5YY5t^T try{ Z&
_kq| SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x[0T$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); )+_Vx}O:} SiteFileFetch fileFetch = new SiteFileFetch(bean); qG9a!sj fileFetch.start(); KF%BX~80C } _*mn4n= catch(Exception e){e.printStackTrace ();} P5Xp #pa $qNF /rF IiPX`V>RC } [\8rh^LFi VGS%U8; L!}!k N:? public static void main(String[] args) JW>k8QjyN { CIW4E new TestMethod(); 6.@.k } m{IlRf' } zMSwU]4I! 点击下载更多相关资料
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