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/* dfij|>:*0 **SiteFileFetch.java D>LZP! */ * iF]n2g: package NetFox; rl#p".4q import java.io.*; i*@<y/&' import java.net.*; TZY3tUx0|G lp(8E6 AD|2qM)) public class SiteFileFetch extends Thread { Yj6*NZ* SN1}xR$ \Hn>oonph SiteInfoBean siteInfoBean = null; //文件信息Bean #g]vc_V long[] nStartPos; //开始位置 1*@'-mj long[] nEndPos; //结束位置 ;e1ku|>$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 6I4oi@hZz long nFileLength; //文件长度 %>g3~yl boolean bFirst = true; //是否第一次取文件 T Kg aV;92 boolean bStop = false; //停止标志
$7rq3y File tmpFile; //文件下载的临时信息 j'MO(ev DataOutputStream output; //输出到文件的输出流 UOxkO H*$jc\
dC //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5
4L\Jx public SiteFileFetch(SiteInfoBean bean) throws IOException CnG+Mc^ { V{:A3C41 siteInfoBean = bean; xUa{1!Y8 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0 g?z&? tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *%S"eWb if(tmpFile.exists ()) LC'{p { XYZ4TeW\1 bFirst = false; f7X6fr< read_nPos(); B4i!/@0s } Yd#/1!A7u else {l/-LZ. { 2kIa*#VOJ nStartPos = new long[bean.getNSplitter()]; 7Z-O_h3;)@ nEndPos = new long[bean.getNSplitter()]; Vv.|br`;} } R'! /XzH?n/{R ,Q
HU_jt u (em&M } 9mmCp&~Z ucG@?@JENm 6 1F(<! public void run() 93`
AWg/T { 3v5%y' //获得文件长度 X;"Sx#U //分割文件 >JC //实例FileSplitterFetch iC98_o_9 //启动FileSplitterFetch线程 f;x kT //等待子线程返回 y&?6FY try{ SBIj<Yy] if(bFirst) Zw ^kmSL" { !AKg m'Nw nFileLength = getFileSize(); 3 G`aHTWk if(nFileLength == -1) z6w3"9Um { ).sRv6/c System.err.println("File Length is not known!"); a{qM2P(S } =A!@6Nw else if(nFileLength == -2) .`4{9?bR { g!+|I System.err.println("File is not access!"); + EGD.S{ } w(/aiV else #w\~&0 { YQ6f}O for(int i=0;i<nStartPos.length;i++) @!yMIM%P { 7:)n$,31FW nStartPos = (long)(i*(nFileLength/nStartPos.length)); s3R(vd } [`c^4E for(int i=0;i<nEndPos.length-1;i++) n1VaLD { BE_ay- nEndPos = nStartPos[i+1]; ]jmL]Ny^ } |>tKq;/ nEndPos[nEndPos.length-1] = nFileLength; RkBb$q9F] } z2QP)150 } TTt#a6eJ d[V;&U 2gq9k}38 //启动子线程 ~XWQhIAM4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Te}8!_ohyC for(int i=0;i<nStartPos.length;i++) VI'hb'2 { /5:bvg+ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), INi]R^- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q^e}?v%=%3 nStartPos,nEndPos,i); zBk'{[y9L Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WzF !6n!h
fileSplitterFetch.start(); fvF?{k> ~} }
s8rE$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I$0)Px%z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); dK2p7xo // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @>)r}b nEndPos = " + nFileLength); %]8qAtV^3j // fileSplitterFetch[nPos.length-1].start(); 7TDy.] U}PiY"S< ,}))u0q+: //等待子线程结束 Hr]h
Jc //int count = 0; 1PP $XJtyD //是否结束while循环 X7i/fm{l' boolean breakWhile = false; 8peDI7[| (m:Zk$ i2&ed_h<? while(!bStop) 3
"Q=Vl" { j(k:
@ write_nPos();
GrAujc5| Utility.sleep(500); (3#Cl
1]f breakWhile = true; .b-f9qc= OI0;BBZ *i- _6s for(int i=0;i<nStartPos.length;i++) L.1_(3NG { EVVP]ND if(!fileSplitterFetch.bDownOver) N.]qU d { 8qu2iPOcZ breakWhile = false; }=6'MjF] break; 0VGPEKRh } L_+k12lm } k'IYA#T6 if(breakWhile) R@6zGZ1 break; jlBanGs? i]|Yg$ we;G]`@? //count++; wm$}Pch //if(count>4) 1I<rXY(a` // siteStop(); {6c2{@ } r!HwXeEn/ 5c^Z/
Jl$c u
a~CEs System.err.println("文件下载结束!"); 5KDGSo } ""1^k2fj catch(Exception e){e.printStackTrace ();} CFqJ/'' } "E8zh|m o J]G?Rc 2cq I[t@0 //获得文件长度 &b?LP] public long getFileSize() `(f!*Ru@/z { sM?MLB\Za int nFileLength = -1; %T)oCjM[\ try{ kWe{r5C7 URL url = new URL(siteInfoBean.getSSiteURL()); }2uI?i8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hvuIxqv !y httpConnection.setRequestProperty("User-Agent","NetFox"); %9M~f* 0LfU=X0#7 1Lg-.-V
int responseCode=httpConnection.getResponseCode(); E !a|Xp if(responseCode>=400) HKqwE=NZ { oA =4=` processErrorCode(responseCode); (A?H1 9 return -2; //-2 represent access is error )~+ e`q } kIGbG;"_ LwK+:4$ B:e
@0049 String sHeader; Xy@7y[s] g"?Y+j 0MkSf* for(int i=1;;i++) 05spovO/' { Wt=| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); XP1~d>j //Utility.log(in.readLine()); 8:#rA*Y sHeader=httpConnection.getHeaderFieldKey(i); rDQ!zlg>l if(sHeader!=null) +=mkCU { xw3YK!$sIF if(sHeader.equals("Content-Length")) BWM YpZom { +{/*z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :LQ5u[g$\ break; Wa1,
p } ecgtUb8K } 9:!gI|C else .%^]9/4 break; ]miy/V }5 } 2OwV^-OG } N @#c,, catch(IOException e){e.printStackTrace ();} EM/@T} catch(Exception e){e.printStackTrace ();} Cz W:L&t T<L^N+<,{N m@Qt.4m%g Utility.log(nFileLength); KMV=%o 2Y>~k{AN% $YXMI",tt< return nFileLength; 7As|Ns` } v9D22,K- x&`~R>5/ h[?O+Z^ //保存下载信息(文件指针位置) BA:yQ private void write_nPos() =r.mlc``W { =Me5ftw try{ dTL5-@ output = new DataOutputStream(new FileOutputStream(tmpFile)); w~;I7: output.writeInt(nStartPos.length); 2<][%> ' for(int i=0;i<nStartPos.length;i++) Hzhceeh_+ { X5]TY] // output.writeLong(nPos); Kv rX{F= output.writeLong(fileSplitterFetch.nStartPos); )
gzR=9l output.writeLong(fileSplitterFetch.nEndPos); AxZD-|. } q\q=PB6r output.close(); `xc^_781\ } $&=p+ catch(IOException e){e.printStackTrace ();} +*n-<x5" catch(Exception e){e.printStackTrace ();} R.s^o]vT } `g_"GE yCXrVN:`, { K_kPgKS //读取保存的下载信息(文件指针位置) r,]#b[:.s| private void read_nPos() *1'`"D~ { HJC(\\~ try{ |w*R8ro_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _oB_YL;,* int nCount = input.readInt(); z**hD2R! nStartPos = new long[nCount]; kip`Myw+ nEndPos = new long[nCount]; e* for(int i=0;i<nStartPos.length;i++) /R
LI,.% { ;@nFVy>U nStartPos = input.readLong(); 9ktEm|F3 nEndPos = input.readLong(); v6GsoQmA } '&FjW-`"
G input.close(); ]}mxY
vu_i } vNW jH!' catch(IOException e){e.printStackTrace ();} @f!AkzI catch(Exception e){e.printStackTrace ();} zD)pF1,7:8 } phYDs9-K >m'x8xB= =9G;PVk| private void processErrorCode(int nErrorCode) QR>
Y%4 ;h { @cq`:_.[ System.err.println("Error Code : " + nErrorCode); U{ ;l0 2S } MDRe(rF= +zkm( }sxn72, //停止文件下载 %@R~DBS public void siteStop() J.RAmU < { 4.K'\S bStop = true; eV6o3u:9 for(int i=0;i<nStartPos.length;i++) [WB{T3j fileSplitterFetch.splitterStop(); CkRX>)=py x3e]d$ &,i~ cG? } "%@uO)A / } [B0K //负责部分文件的抓取 ,}C8;/V **FileSplitterFetch.java gor<g))\ */ @("}]/O
V: package NetFox; M;Wha;%E" q9dLHi<1 \NX Q import java.io.*; K`nJVc import java.net.*; HXJ9xkrr m]IysyFFK -)<mS public class FileSplitterFetch extends Thread { t#<KxwhcN "]t>ZT:OJ }`9`JmNM String sURL; //File URL gvnj&h.GV long nStartPos; //File Snippet Start Position o6?l/nJ long nEndPos; //File Snippet End Position 9b6!CNe! int nThreadID; //Thread's ID =Mhg boolean bDownOver = false; //Downing is over PaVO"y]C boolean bStop = false; //Stop identical b4 hIeBI\ FileAccessI fileAccessI = null; //File Access interface 9.0WKcwg =p&sl;PsLw 4w{-'M.B public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Yb=6C3l@ { wk02[ this.sURL = sURL; E' %lxr this.nStartPos = nStart; * Zd_
HJi this.nEndPos = nEnd; _2jw,WKr nThreadID = id; z };ZxN fileAccessI = new FileAccessI(sName,nStartPos);//定位 HR3_@^<7 } v3JPE])/
F$*3@Y j;2<-{ public void run() n6d^>s9J { *\LyNL( while(nStartPos < nEndPos && !bStop) ARx0zI%N { JCQ:+eqt -NDi5i\ $o^e:Y,
a try{ lEfBe)7+ URL url = new URL(sURL); i=8UBryr'e HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -3mgza httpConnection.setRequestProperty("User-Agent","NetFox"); rR!U; String sProperty = "bytes="+nStartPos+"-"; r] t )x* httpConnection.setRequestProperty("RANGE",sProperty); F^'v{@C Utility.log(sProperty); ?Bu}.0ku-$ tF`MT%{Va 6s,2NeVWa InputStream input = httpConnection.getInputStream(); Z5>V{o //logResponseHead(httpConnection); +{6`F1MO [A_r1g&_ `{G?>z Fp byte[] b = new byte[1024]; /{DaPqRa int nRead; z{6YC~ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) O3ZM:,. { >Zdi5')
5 nStartPos += fileAccessI.write(b,0,nRead); hNO)~rt //if(nThreadID == 1) #` +]{4hR // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); & z gPN8u } _[1^s$ 4zzlazU E|,30Z+ Utility.log("Thread " + nThreadID + " is over!"); (zmNa}- bDownOver = true; kr{) //nPos = fileAccessI.write (b,0,nRead); `Z8^+AMc } b8HE."*t catch(Exception e){e.printStackTrace ();} u0BMyH } qsvpW%?aE } =43d%N
M,JA;a, _ K6(.KEW //打印回应的头信息 1$OVe4H1 public void logResponseHead(HttpURLConnection con) bx7\QU+ { (!ZV9S for(int i=1;;i++) <c\]Ct { -? Tz.y& String header=con.getHeaderFieldKey(i);
7&px+155 if(header!=null) Q!x`M4 //responseHeaders.put(header,httpConnection.getHeaderField(header)); tO4):i1 Utility.log(header+" : "+con.getHeaderField(header)); T\cR2ZT~ else j Ii[ break; O8$~*NFJf }
Ft$^x-d } Nor`c+,4 NZ)b:~a &PSTwZd public void splitterStop() yP%o0n/"x { 55,=[ bStop = true; 9H[/T j-; } )"F5lOA6 K{N%kk%F pEkOSG } E+Im~=m$ _lNC<7+#h +.wT
9kFcc /* )+*{Y$/U **FileAccess.java }z?xGW/k *//文件访问(定位,写) 8Y xhd
. package NetFox; &!6DC5 import java.io.*; T|!D>l' Y!;gQeC 0w'|d@*wV public class FileAccessI implements Serializable{ ;n`
$+g:> pY,O_
t$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^aT;aP^l RandomAccessFile oSavedFile; cP,;Qbe long nPos; PlF!cr7:4 ZXh~79
A<2I! public FileAccessI() throws IOException KCl &H { hc6.#~i this("",0); @Mzz2&(dU } ^J0zXe -d [pr 9 $Jr &7fY_~ )B public FileAccessI(String sName,long nPos) throws IOException T6,V { %
<^[j^j}o oSavedFile = new RandomAccessFile(sName,"rw"); QTeFR&q8 this.nPos = nPos; 8i[".9}G\ oSavedFile.seek(nPos); 6GY32\Ac } z;ULQ U%h7h`=F? 70duk:Ri0 public synchronized int write(byte[] b,int nStart,int nLen) qP qy4V.; { aN:HG)$@ int n = -1; yB=C5-\F try{ v;Swo(" oSavedFile.write(b,nStart,nLen); ^g70AqUc n = nLen; 8g.AT@ ,Q } 9^(HXH_f catch(IOException e) Y:rJK|m { NoJUx['6 e.printStackTrace (); I Jqv w } g)X7FxS,z HgYc@P*b &|s+KP|d return n; V;H
d)v(j } _k6x=V;9g DakLD~H; i^/
eN } L7s>su|c( N&?T0Ge; lt{lHat1 /* kV_#9z7% **SiteInfoBean.java Ft )t`E'%j */ qo)Q}0 package NetFox; j p! 1]_?$)$T <"hb#Tn public class SiteInfoBean { <V7SSm j.<:00< (W7;}g ysh private String sSiteURL; //Site's URL i5.?g <.H private String sFilePath; //Saved File's Path eVZa6la" private String sFileName; //Saved File's Name S@9w'upd private int nSplitter; //Count of Splited Downloading File iJ,M-GHK YR?3 61FK $K+4C0wX` public SiteInfoBean() ,2RC |h^O, {//nSplitter的缺省值为5 2T//%ys= //default value of nSplitter is 5 g8LT7 this("","","",5); \m(ymp<c` } Jq=00fcT+ K5 5} Wi C(EYM$ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z\e>DdS { XyvZ&d6(d sSiteURL= sURL; c9\B[@-q sFilePath = sPath; os}b?I*K sFileName = sName; yT[Lzv# this.nSplitter = nSpiltter; J"/JRn 5dg-d\6S UN-T^ } AF6d#Klog dNOX&$/= A
Z4|&iT public String getSSiteURL() BO?mQu~ { -
P\S>G. return sSiteURL; x1 .3W j } hq5NQi`
% '9IP; zY]Bu-S3 public void setSSiteURL(String value) 0|.7Kz^ { C<r(-qO{5 sSiteURL = value; B*-ToXQQr } ,Adus M ]jHgo](% ,:v.L}+Z public String getSFilePath() &?KPu?9 { 4C l,Iw/; return sFilePath; o}WB(WsG } I(z>)S'7r aSn0o_4bD "}S9`-Wd| public void setSFilePath(String value) [54@i rH { IW5*9)N? sFilePath = value; A6{t%k~F } B`g<Ge~ Q
mb[ e> Rf)'HT public String getSFileName() .'l.7t { di-O*ug return sFileName; Aivu %}_| } _ff=B @m+pr\h( GCcwEl!K^ public void setSFileName(String value) e#l*/G*, { g0^~J2sDd sFileName = value; >Sc$R0 } mA&RN"+V F3kC"H (Wm/$P; public int getNSplitter() d%}crM-KTL { r4;5b s6wm return nSplitter; ^m6k@VM } 9F2w.(m c*y$bf< LVPt*S= / public void setNSplitter(int nCount) ke3HK9P; { - XE79 fQ nSplitter = nCount; Fy}MXe"f } xT_fr,P } .yctE:n ^/`#9]<% PphR4 sIM /* Eg@R[ ^T **Utility.java _Vdb? */ @D.R0uM package NetFox; ?RgU6/2 pr0@sri@ c[wQJc public class Utility { OoAr% JVJ1Ay/be j33P~H~ public Utility() *=-__|t { &[?u1qQ%o 7h9 fQ&y v$gMLu= } c8k6(#\ &+E'1h10 //线程睡眠 K#9(|2J% public static void sleep(int nSecond) xG *lV|<7> { ~pd1) try{ %\(y8QV Thread.sleep(nSecond); uPv;y!Lsa@ } )8 "EI-/. catch(Exception e) 68&6J's; { Pe+ 8~0o=R e.printStackTrace (); :$SRG^7md } ;
McIxvj } r85Xa'hh ,?0-=o //日志 BNL8hK`D public static void log(String sMsg) yNhscAMNn { 877EKvsiC System.err.println(sMsg); }#\;np } PBxK>a VgFF+Eg Se^/VVm public static void log(int sMsg) GvZac { RvyBg:Aj5 System.err.println(sMsg); /XWPN(JC? } [#hl}q(P# } 4pfix1F g `mq4WXO\ _e:5XQ /* 0p:ClM2O
**TestMethod.java e6{[o@aM{ */ \J,- <wF package NetFox; xY\*L:TwW h9Tf@]W
Y2=Brtc[@ public class TestMethod { Oi
kU$~| 0_,3/EWa X YNUss public TestMethod() n3l"L|W^(< { ///xx/weblogic60b2_win.exe 9Th32}H try{ 6yu*a_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &{%S0\K Y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); #czyr@ SiteFileFetch fileFetch = new SiteFileFetch(bean); D<_,>{$gW fileFetch.start(); }QWTPRn } A1k&`
|k catch(Exception e){e.printStackTrace ();} PNxVW @Q$/eL 9?g]qy,1) } r7Q:l ?F2 -_{C+Y_ l$p_])x public static void main(String[] args) |oBdryi { U>L=.\\| new TestMethod(); 48~m=mI } ]df9'\ } 9aF.. 点击下载更多相关资料
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