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/* ]Ag{#GJ5D **SiteFileFetch.java ,N@N4<C] */ &D#B"XI package NetFox; Z.3*sp0
yv import java.io.*; B5MEE import java.net.*; f\c%G=y ?Y'r=Q{w e*hCf5=- public class SiteFileFetch extends Thread { DPylc9[- e<-^ }`D-]/T8. SiteInfoBean siteInfoBean = null; //文件信息Bean +YnQOh%v0s long[] nStartPos; //开始位置 % QI6`@Y" long[] nEndPos; //结束位置 &OP =O*B FileSplitterFetch[] fileSplitterFetch; //子线程对象 "<1-9CMl long nFileLength; //文件长度 MVZ9x% boolean bFirst = true; //是否第一次取文件 [K#pU:lTH boolean bStop = false; //停止标志 t2#zQ[~X! File tmpFile; //文件下载的临时信息 MB3
N3,yL DataOutputStream output; //输出到文件的输出流 ErY-`8U" {14sI*b16 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 0=c:O public SiteFileFetch(SiteInfoBean bean) throws IOException :my@Oxx4@ { @j+X>TD siteInfoBean = bean; .R{+Pz D //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #PZBh tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ZA8FX
if(tmpFile.exists ()) K])|
V { X2to](\%X bFirst = false; -`d(>ok read_nPos(); zR_yxs' } \aB"D=P\ok else <n)R?P(or { ]]lM) nStartPos = new long[bean.getNSplitter()]; SCKpW#2dP{ nEndPos = new long[bean.getNSplitter()]; m`H9^w%W } gfmaO] b@yFqgJ_ 4!0nM|~ q.69<Rs } ?&se]\ kq=tL@W`0} ff<adl- public void run() 5H
|<h { 9Li.B1j //获得文件长度 _~_6qTv-d //分割文件 WDQw)EUl& //实例FileSplitterFetch iBPx97a //启动FileSplitterFetch线程 dxF/]>t //等待子线程返回 I<L<xwh1(E try{ uc-Go
6W if(bFirst) n9r3CLb[ { S[L2vM) nFileLength = getFileSize(); 7T@"2WYat if(nFileLength == -1) R;Gf3K { /S\y-M9
System.err.println("File Length is not known!"); E?3$ *t } :h)A/k_ else if(nFileLength == -2) %QKRl5RM- { |q*s)8 System.err.println("File is not access!"); wO3K2I]>0 } N~@VZbS(6 else P
g1EE"N@ { I0]"o#LjT for(int i=0;i<nStartPos.length;i++) PmT,*C`/X { ,Jh('r7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); Zfn390 _ } |?
l6S for(int i=0;i<nEndPos.length-1;i++) =| M[JPr { xtP=/B/ nEndPos = nStartPos[i+1]; -(YdK8 } 1O]27"9 nEndPos[nEndPos.length-1] = nFileLength; g&6O*vx } l\Or.I7n
} GDj
ViAFm ewb/Z[4 4yu ^cix( //启动子线程 smt6).o fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Uv"GG:
K_ for(int i=0;i<nStartPos.length;i++) 6X.lncE@p { >o"3:/3 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 34P5[j!h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), l
TJqWSV=f nStartPos,nEndPos,i); Y8yRQz u Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 63?fn~0\ fileSplitterFetch.start(); bs_"Nn? } q$=EUB"C // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v|v^(P,o siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 32*FI SH^ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4f?Y'+>Z, nEndPos = " + nFileLength); Rtl;*ZAS // fileSplitterFetch[nPos.length-1].start(); Oy!j ` (mJqI)m8 p8q9:Tz //等待子线程结束 G;%Pf9o26 //int count = 0; B R-(@ //是否结束while循环 |,ZmRW^2K boolean breakWhile = false; y'<juaw 3=r8kh7, n_n0Q}du while(!bStop) hC.7Z] { <E|K<}W# write_nPos(); bTn7$EG Utility.sleep(500); L:y}
L breakWhile = true; syYg, G[ Hop$w <4W"ne28 for(int i=0;i<nStartPos.length;i++) AE)<ee%\\ { m$xyUv1 if(!fileSplitterFetch.bDownOver) xwj%X%2 { 2dr[0tE breakWhile = false; y/m^G=Q6g# break; |Aw(v6 } ,Jf)A/_ } d/G P.d if(breakWhile) J(\"\Z break; *My? l75 3d.JV'C'c C'hI{4@P //count++; _|ucC$* //if(count>4) WRJ+l_81 // siteStop(); ?zKVXK7}0 } TIV1?S +OF(CcA^ KZL5>E System.err.println("文件下载结束!"); ?'K}bmdt}. } Z3G>DF:$ catch(Exception e){e.printStackTrace ();} 'A,&9E{%1 } Lrr^obc fz
W%(.tc\ 2FO.!m //获得文件长度 _1c'~; public long getFileSize() u!%]?MSc { I'o9.B8%# int nFileLength = -1; X9nt;A2TU+ try{ <GShm~XD2 URL url = new URL(siteInfoBean.getSSiteURL()); j8@YoD5o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L;xc,"\3 httpConnection.setRequestProperty("User-Agent","NetFox"); yg "u^*r& Etj*3/n| IC9:&C[ int responseCode=httpConnection.getResponseCode(); B7TA:K
if(responseCode>=400) 2C %{A { f{lg{gA( processErrorCode(responseCode); LS?hb)7 return -2; //-2 represent access is error 2|o6~m<pE } Um\Nd#=: GljxYH"]# 0K,*FdA String sHeader; 0z."6r JW&/l >.PLD} zE_ for(int i=1;;i++) Q/iaxY# { mqk~Pno|< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); b^PYA_k-Xn //Utility.log(in.readLine()); uj&^W[s sHeader=httpConnection.getHeaderFieldKey(i); A$W,#`E if(sHeader!=null) 7I`e5\ u { q+t*3;X. if(sHeader.equals("Content-Length")) fk P@e3
{ `6!l!8
v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &:8a[C2= break; 6@!<'l%z } 3bpbk } [e ;K$ else gyieS Xz[ break; PP&AF?C } E/LR(d_ } m$A|Sx&sG$ catch(IOException e){e.printStackTrace ();} f6^H
Q1SSt catch(Exception e){e.printStackTrace ();} (I, PC*: j0o_`` 8;.WX Utility.log(nFileLength); R3&W.?C
T 6+FmYp mN_RB{g{ return nFileLength; ]m(Uv8/6 } (ui"vLk8PP 'HkV_d[li cy?u
* //保存下载信息(文件指针位置) Revc
:m1o private void write_nPos() M'HmVg4' { hp,bfcM try{ _i:yI-jA output = new DataOutputStream(new FileOutputStream(tmpFile)); O~-#>a output.writeInt(nStartPos.length); j,Qp*b#Qo for(int i=0;i<nStartPos.length;i++) 8@Xq ,J { KCDEMs}}zM // output.writeLong(nPos); ar=uDb; output.writeLong(fileSplitterFetch.nStartPos); [1dlV/ output.writeLong(fileSplitterFetch.nEndPos); ^{-J Y } e0+N1kY output.close(); kfg9l?R$I< } 5>"$95D catch(IOException e){e.printStackTrace ();} =wPl;SDf! catch(Exception e){e.printStackTrace ();} U9IN# ;W } lEANN u nod?v2% \NS\>Q+d //读取保存的下载信息(文件指针位置) A/W0O;*q private void read_nPos() M2[;b+W9 { 4{X5ZS?CkI try{ TNUzNA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); U=QV^I Qm int nCount = input.readInt(); L/"XIMI*Xg nStartPos = new long[nCount]; y!."FoQ nEndPos = new long[nCount]; Qy*`s for(int i=0;i<nStartPos.length;i++) 65\'(99yU { 55Y BO$
nStartPos = input.readLong(); VW I{ wC nEndPos = input.readLong(); {XC# -3O } My76]\Psh input.close(); g03I<<|@ } =" #O1$ catch(IOException e){e.printStackTrace ();} \eT0d< catch(Exception e){e.printStackTrace ();} 1xar
L)) } )Pakb!0H@t #O/ihRoaO t`o-HWfS. private void processErrorCode(int nErrorCode) {l%Of { GP<A v1 System.err.println("Error Code : " + nErrorCode); p}.L]Y } t)=u}t$ PzWhB* iBR "H" 4(3 //停止文件下载 (q59cA w~X public void siteStop() 5(^&0c>P { 1\=)b< y bStop = true; eqb8W5h' for(int i=0;i<nStartPos.length;i++) 75u/'0~5 fileSplitterFetch.splitterStop(); y$Sn3_9 V [ma'11?G Jajo!X*Wai } zp:kdN7!^ } KaNi'=nW //负责部分文件的抓取 3vfm$sx@ **FileSplitterFetch.java T@GT=1E) */ 1N{}G$'Go package NetFox; qT$;ZV
#
s!X@ l 0?8O9i import java.io.*; (/UW}$] h import java.net.*; Hm!ffqO_ _CO?HX5ek hCV e05
public class FileSplitterFetch extends Thread { N DZ :`D 1@rI4U@D [APwHIS String sURL; //File URL HQJ_:x
Y long nStartPos; //File Snippet Start Position h+<vWo}H long nEndPos; //File Snippet End Position 1G$fU
zS int nThreadID; //Thread's ID ``$Dgj[ boolean bDownOver = false; //Downing is over E #q
gt9 boolean bStop = false; //Stop identical cVYDO*N2T FileAccessI fileAccessI = null; //File Access interface B+[ri&6X\ B9^@d |T\`wcP`q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException b;G3&R] { -c|dTZ8D)8 this.sURL = sURL; F7P?*!dx this.nStartPos = nStart; KX D&FDkF this.nEndPos = nEnd; M3P\1 nThreadID = id; yB0xa% fileAccessI = new FileAccessI(sName,nStartPos);//定位 3tzb@T } %Hx8%G! _uwM%M; /~~aK2{^X~ public void run() GOrDDp { v EppkS U1 while(nStartPos < nEndPos && !bStop) -< D7 { FcVQ_6 ntR@[)K fy]z<SPhVJ try{ U4)x "s[CP URL url = new URL(sURL); 8T<LNC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nb-]fa httpConnection.setRequestProperty("User-Agent","NetFox"); %3b;`Oa String sProperty = "bytes="+nStartPos+"-"; #gn{X!;-; httpConnection.setRequestProperty("RANGE",sProperty); _3@[S
F Utility.log(sProperty); yvR3| `#@#eZ -': ;0 InputStream input = httpConnection.getInputStream(); ]nPfIBoS //logResponseHead(httpConnection); 2E5n07, +g %h,@ ! |4fww byte[] b = new byte[1024]; cxX/ b, int nRead; F{*{f =E!B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "#}Uh { Q1f)uwh nStartPos += fileAccessI.write(b,0,nRead); (bhMo^3/* //if(nThreadID == 1) h0**[LDH // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *rKj%Me } <"/b 5kc N;Hoi8W >A&D/kMO Utility.log("Thread " + nThreadID + " is over!"); @}9*rWJIE bDownOver = true; 3DjlX* //nPos = fileAccessI.write (b,0,nRead); WxPu{N } *^[m?3"W catch(Exception e){e.printStackTrace ();} Yr!@p Hy } )R
%>g-dw } B
]*v{?<W T{WJf-pI ZkWX4?&OMt //打印回应的头信息 WAq)1gwN public void logResponseHead(HttpURLConnection con) LV}Z[\? { PFR64HK2 for(int i=1;;i++) OVq(ulwi+ { 2/o_,k String header=con.getHeaderFieldKey(i); ^*?mb) if(header!=null) O q3aboAt //responseHeaders.put(header,httpConnection.getHeaderField(header)); D[jPz0 Utility.log(header+" : "+con.getHeaderField(header)); \B/!}Tn; else zX]4DLl, break; 9}-;OJe } ( JMk0H3u } Gx)U~L$B MZIZ"b r+%$0eB1^ public void splitterStop() o|7ztpr { ~K$dQb]) bStop = true; k2-+3zx } P~}Yj@2 ZuLW%z. x*'2%3C~ } N1D{ % !)r1zSY"g pNFVa<D /* DhVO}g)2# **FileAccess.java q%S^3C& *//文件访问(定位,写) aHR+4m~) package NetFox; evSr?ys import java.io.*; ,vDSY N6 /Fj*sS8 ]0o_-
NI public class FileAccessI implements Serializable{ TI5<'
U) k,,Bf-?
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 D[p_uDIz RandomAccessFile oSavedFile; 0{^ 0>H0 long nPos; qtR/K=^i )U|0vr8: ~o8 public FileAccessI() throws IOException `g}po%k { dDrzO*a\ this("",0); q<XleC } fK/|0@B8 >,6%Y3 Zdfruzl&` public FileAccessI(String sName,long nPos) throws IOException T)#e=WcP] { b3 NEYn oSavedFile = new RandomAccessFile(sName,"rw"); uqHI/4 this.nPos = nPos; 1xTNrLW oSavedFile.seek(nPos); L#k`>Qn2 } ]q`'l_O cj;k{Moc $Wn!vbL public synchronized int write(byte[] b,int nStart,int nLen) w#
R0QF { GT 5J` int n = -1; b3.}m[] try{ 230ijq3YG oSavedFile.write(b,nStart,nLen); i'YM9*yN n = nLen; +/>XOY|Ie } P>nz8NRq catch(IOException e) !sVW0JS h { nPR*mbW e.printStackTrace (); cI\&&<>SlG } Oil~QAd, oiRrpS\T. ' e:rL. return n; $!goM~pZ } ,a34=, "1wjh=@z .b|!FWHNS } q[TGEgG D KRF#*[=d (zml704dI) /* AA XQ+! **SiteInfoBean.java WRqpQEY */ ' OXL'_Xl package NetFox; sl_f+h0
TcpaZ
'x %CV.xDE8 public class SiteInfoBean { K''2Jfm yJGnN g "Z]z9( private String sSiteURL; //Site's URL @5j3[e private String sFilePath; //Saved File's Path
#_kV o3 private String sFileName; //Saved File's Name '/F%
ff private int nSplitter; //Count of Splited Downloading File zP8rW5/ quL+UFuM 7r{159&= public SiteInfoBean() |wM<n {//nSplitter的缺省值为5 6<o2 0(? //default value of nSplitter is 5 8}Cp(z2 this("","","",5); kYZj^tR } HhB&vi "IJ 9vXI tjJi| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) a v"dJm { +W+o~BE sSiteURL= sURL; Hto+spW sFilePath = sPath; Gt$PBlq0 sFileName = sName; wCt!.<, . this.nSplitter = nSpiltter; &PUn,9 Rm YP`/dX"4 FO:k
>F } | Zj=E$ s x2\ a8 .x=j< public String getSSiteURL() ~COd(,ul { >Yx,%a@~R return sSiteURL; !bBx' } L=&dJpyfT y q6:7< %\B@!4] public void setSSiteURL(String value) M7.H;.? { \ZtF,`Z sSiteURL = value; {JtfEna } /Jc54d @r/f cuQAXqXC@ public String getSFilePath() lZJbQ=K{ { ^=ar Kp,?5 return sFilePath; M)G|K a } &~"e["gF= c JOT{ ,HwOMoP7 public void setSFilePath(String value) !h70 <Q^ { ozkmZ; sFilePath = value; |3C5"R3ZGO } W3A9uk6 h|N!U/(U W[qQDn!r public String getSFileName() C zxF { yDw#V`Y^M return sFileName; qa,i:T(w } #@:GLmD% j4+kL4M@H (%)<jg1 public void setSFileName(String value) <P_B|Y4N/ { f,VJfY?# sFileName = value; ?sclOOh } z4r g.ai <|;)iT1VeT [&+5E1%L public int getNSplitter() S8Yti { EttQ<z_T return nSplitter; ;mwU>l,4 } k? !'OHmBL B`?5G\7L v4VP7h6uD) public void setNSplitter(int nCount) .-}F~FES { lj 2OOU{ nSplitter = nCount;
K2D,
*w } 'Omj-o'tn9 } ~#|Pe1Y f5,!,]XO :,Mg1Zf /* dPmNX-'7 **Utility.java %<h+_(\h */ wqAj=1M\ package NetFox; 7i88iT Q6hWHfS dReJ;x4 public class Utility { ?y2v?h" 1{?5/F \ + +J7xAyv_Oz public Utility() }o7"2hht { Pvz\zRq Y(C-o[-N V?N8 ,)j }
t&H3yV -$o4WSd~ //线程睡眠 5?-@}PL!Y public static void sleep(int nSecond) {xCqz0 { G'(8/os{ try{ HBcL1wfS Thread.sleep(nSecond); 0l2@3}e } fu{.Ir catch(Exception e) ~c${?uf { {J]x81}*; e.printStackTrace (); !c;BOCqa } M1J77LfS8 } a$]i8AeG .y>G/8_i //日志 o$k9$H>Na public static void log(String sMsg) u9D#5NvGs { >_SqM! ^v System.err.println(sMsg); TgvBy } s'=w/os +K7oyZg Gk]6WLi public static void log(int sMsg) ?(>fB2^ { eY8rm System.err.println(sMsg); >rid3~ } ?VR:e7|tU } 4x2,X`pe3 P:fcbfH+ Q$8K-5U% /* hv#|dI=kZR **TestMethod.java HB,
k}Q */ G$-[(eu- package NetFox; ;CLOZ{ @aUQy; E{xcu9 public class TestMethod { /eY}0q% UpS7>c7s ^(~%'f public TestMethod() M&^Iun { ///xx/weblogic60b2_win.exe 1XJLGMW, try{ pvY BhTz0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); mH/9J
//SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Z^O_7I<5E SiteFileFetch fileFetch = new SiteFileFetch(bean); wOF";0EN fileFetch.start(); rLp (}^ } z65Q"A catch(Exception e){e.printStackTrace ();} vY2^*3\<D m.w.h^f$& U$7]*#@& } ?V' zG&n@ cA{7*=G? J1"16Uu public static void main(String[] args) }N0v_Nas;v { J3c8WS{: new TestMethod(); Zce/& } l'twy$V4|~ } ayrCLv 点击下载更多相关资料
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