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/* vuPNru" 2 **SiteFileFetch.java \ m~?yq8H */ Zf@B<
m package NetFox; 30uPDDvar import java.io.*;
#O}}pF import java.net.*; 6 Ln~b <I T9Q3I \\<=J[R.M public class SiteFileFetch extends Thread { &Q~W{. iOURS w'(/dr SiteInfoBean siteInfoBean = null; //文件信息Bean jW`JThoq long[] nStartPos; //开始位置 4($"4>BA long[] nEndPos; //结束位置
SW#/;|m FileSplitterFetch[] fileSplitterFetch; //子线程对象 f;
|fS~ long nFileLength; //文件长度 gx9Os2Z|3 boolean bFirst = true; //是否第一次取文件 :}v-+eIQ boolean bStop = false; //停止标志 {IV%_y? File tmpFile; //文件下载的临时信息 |{YN3"qN DataOutputStream output; //输出到文件的输出流 `9K5 ;] h9ScN(|0y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <Pt?N2]A| public SiteFileFetch(SiteInfoBean bean) throws IOException Z)W8Of_ { Blzvn19'h siteInfoBean = bean; I61S0lz/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :LNE?@ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h:362&?] if(tmpFile.exists ()) !="q"X/* { v5S9h[gT bFirst = false; (~^fx\-S read_nPos(); 6I@j$edZ } BM,hcTr? else i)z|=
|? { Uv
*Aa7M nStartPos = new long[bean.getNSplitter()]; nFEJO&1+ nEndPos = new long[bean.getNSplitter()]; Z*co\ pW } 11yXI[ 1W{N6+u El<*) =9a2+ v0 } A%.mIc. v&YeQC> 4Lt9Dx1 public void run() NVv
<vu { _K~h?
\u //获得文件长度 eTS}- //分割文件 sh$-}1 ; //实例FileSplitterFetch %MjoY_<:_ //启动FileSplitterFetch线程 13!@LbC //等待子线程返回 LBK{-(% try{ 2@zduL'do_ if(bFirst) g^]Iw~T6$ { XX~vg>3_ nFileLength = getFileSize(); )Fv.eIBY if(nFileLength == -1)
l!|c_ { fkzSX8a9} System.err.println("File Length is not known!"); 2H|:/y } /e '3\,2_ else if(nFileLength == -2) .c"nDCFVR { ^}=)jLS System.err.println("File is not access!"); 9b+jT{Tg } ]^~}/@ else b0$)G-E/Y { FbE/x$;~O for(int i=0;i<nStartPos.length;i++) yV{B,T`W { PdcIHN nStartPos = (long)(i*(nFileLength/nStartPos.length)); A#"Wk]jX } 2!/Kt
O)i^ for(int i=0;i<nEndPos.length-1;i++) wGArR7r { !LN8=u. nEndPos = nStartPos[i+1]; tUv>1)
[ } wX"hUu nEndPos[nEndPos.length-1] = nFileLength; i?6&4 } QQ3<)i } >j5\J_(;D X1|
+9
7=6:ZSI //启动子线程 At(88(y-W fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )5Khl"6!z for(int i=0;i<nStartPos.length;i++) EjR(AqZY { ;l@94)@0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uks75W!}U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h:%,>I%{ nStartPos,nEndPos,i); d/7fJ8y8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MgJ6{xzz fileSplitterFetch.start(); cfLF@LW!]) } *r`=hNr // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v/`D0g-uX) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (u,)v_Oo]a // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", c?A$Y?|9 nEndPos = " + nFileLength); }\"EI<$s // fileSplitterFetch[nPos.length-1].start(); 3Zb%-_%j ]" 'yf;g @Po5AK3cy //等待子线程结束 q#K{~: //int count = 0; -N45ni87 //是否结束while循环 }@r23g% boolean breakWhile = false; DB' 0 >f]/VaMH{ KUI{Z I while(!bStop) v ccH(T { k"N>pjgd$ write_nPos(); oPSPb(. Utility.sleep(500); j_8 Y Fz5 breakWhile = true; !vSI"$xd B]rdgjz*
w$}q`k' for(int i=0;i<nStartPos.length;i++) Nm*(?1 { :5t4KcQ if(!fileSplitterFetch.bDownOver) -/Q5?0z { Qa{5]+E breakWhile = false; VdHT3r break; jRK}H*uem } #dauXUKH } O =Z}DGa+ if(breakWhile) F]$ Nu break; n1-p/a. Xoe|]@U` t;8)M$
p //count++; ;wv[';J //if(count>4) )@g[aRFa // siteStop(); 1WUSp;JMl } @.t +
BlVHP8/b o=m5AUe?J System.err.println("文件下载结束!"); 7)rQf{q7 } W5R/Ub@g catch(Exception e){e.printStackTrace ();} m}]{Y'i]R } k<9,Ypa
"- 4|HA tr0b#4 //获得文件长度 H,7='n7" public long getFileSize() %BI8m|6 { P3oYk_oW int nFileLength = -1; Xb_
V\b0 try{ S:xXD^n#H URL url = new URL(siteInfoBean.getSSiteURL()); Hg#tSE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
c1H.v^Y5 httpConnection.setRequestProperty("User-Agent","NetFox"); 2q?/aw ;Z {]CZgqE{ vt
EfH int responseCode=httpConnection.getResponseCode(); 46?z*~*G if(responseCode>=400) W{,fpm { 529;_| processErrorCode(responseCode); K;
#FU return -2; //-2 represent access is error #VQZ"7nI@ } VfnL-bDGV >.?yz aBAoSn String sHeader; %'2P4( 8FsQLeOE t[|oSF#i for(int i=1;;i++) }z]d] { ?^&ih:" //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A c_P^ //Utility.log(in.readLine()); IFLphm5 sHeader=httpConnection.getHeaderFieldKey(i); ql?w6qFs] if(sHeader!=null) </I%VHP,[f { > X~\(|EM if(sHeader.equals("Content-Length")) xQ9t1b|{e { q!z?Tn#!jd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); *DJsY/9d}' break; WIWo4[( } _H| )g*]t } `m 5\ else 5_^d3LOT0x break; Q2fxsa[ } 8eT#-9q@ } RXXHg catch(IOException e){e.printStackTrace ();} dDcQSshL catch(Exception e){e.printStackTrace ();} &8VH m?h vn.5X \'O/3Y7?X Utility.log(nFileLength); KXWcg#zFY [}L?EM {|9knP return nFileLength;
Dl!0Hl } .][yH[F E~y8X9HZ) U][E`[m# //保存下载信息(文件指针位置) PMQTcQ^ private void write_nPos() g`y9UYeh { <@J$hs9s try{ B>u`%Ry& output = new DataOutputStream(new FileOutputStream(tmpFile)); 8@3=SO output.writeInt(nStartPos.length); 5OdsT-y for(int i=0;i<nStartPos.length;i++) i4YskhT { r/h\>s+N // output.writeLong(nPos); }s2CND output.writeLong(fileSplitterFetch.nStartPos); /JNG}* output.writeLong(fileSplitterFetch.nEndPos); AD } |gkNhxzB output.close(); Uw4iWcC } {aE[h[=r catch(IOException e){e.printStackTrace ();} /)K') catch(Exception e){e.printStackTrace ();} lBP?7`U } SFg4}*"C / imOIO[<; / Xnq0hN //读取保存的下载信息(文件指针位置) veDv14 private void read_nPos() zlLZ8b+ { O72g'qFPE try{ +v/y{8Fu DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DN^+"_:TB int nCount = input.readInt(); =p|IWn{P nStartPos = new long[nCount]; 3[#^$_96b nEndPos = new long[nCount]; :[a*I6/^ for(int i=0;i<nStartPos.length;i++) F-kjv\ { j+!u=E nStartPos = input.readLong(); '@t,G,FJ nEndPos = input.readLong(); w/NT 5 } \BBs;z[/ input.close(); kQI'kL8> } %@QxU-k_ catch(IOException e){e.printStackTrace ();} QFTiE1mGH catch(Exception e){e.printStackTrace ();} iv`G}.Bo } }w)}=WmD aPJTH0u zd_N' :6 private void processErrorCode(int nErrorCode) Ry[7PLn] { #>yOp * System.err.println("Error Code : " + nErrorCode); |X{j^JP5 } "OwM'
n8 :U\*4l <xBL/e
% //停止文件下载 +;+G+Tn public void siteStop() D*UxPm"pw { 2Ys=/mh bStop = true; D <~UaHfk for(int i=0;i<nStartPos.length;i++) 9#[,{2pJr fileSplitterFetch.splitterStop(); 2-m@- rk=/iD !@!603Gy } 7
\xCNOKh } T6y~iNd< //负责部分文件的抓取 kRggVRM **FileSplitterFetch.java HnPy";{ */ KyIUz9$ package NetFox; |HAbZd7PG U]pE{^\w rFcz0 import java.io.*; ~xzr8 P import java.net.*; dr#%~I fFEB#l!oUb }#g]qK public class FileSplitterFetch extends Thread { :V$\y up GX23c
i i^WY/ OhL String sURL; //File URL 'xd8rN%T long nStartPos; //File Snippet Start Position i&(1<S>P long nEndPos; //File Snippet End Position L0VZ>!*o int nThreadID; //Thread's ID H8g6ZCU~ boolean bDownOver = false; //Downing is over .Z]hS7t boolean bStop = false; //Stop identical ;u`8pF!_eE FileAccessI fileAccessI = null; //File Access interface !,$K;L Bor_(eL^ iB99.,o-& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zw'%n+5m { V+D <626o this.sURL = sURL; it{Jd\/hR this.nStartPos = nStart; {'alA this.nEndPos = nEnd; z,ryY'ua/I nThreadID = id; 1N65 M=) fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~%lUzabMa } {$t*XTY6R %1
RWF6 [PXq<ST public void run() #P!<u Lc% { Sg%s\p]N_# while(nStartPos < nEndPos && !bStop) ~jJ.E_i { iWWtL 6RIbsy ;Ows8 try{ FD!8o URL url = new URL(sURL); 6yYjZ< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W*iTg%a\k httpConnection.setRequestProperty("User-Agent","NetFox"); ]Ndy12,M String sProperty = "bytes="+nStartPos+"-"; ;HYEJ3 httpConnection.setRequestProperty("RANGE",sProperty); IAbQgBvUD Utility.log(sProperty); ta5_k&3N NHUJ:j@ YXTV$A+lW InputStream input = httpConnection.getInputStream(); +<$nZ=,hsy //logResponseHead(httpConnection); m|B)A"Sm }>y!I5O Rkg)yme!N byte[] b = new byte[1024]; K%`]HW@I{ int nRead; 4cy,'B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) vr"Pr4z4i { dHAT($QG nStartPos += fileAccessI.write(b,0,nRead); ic}TiTK //if(nThreadID == 1) o6w8Y/VPu // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zrSYLG } CN` ~DD{ 22ySMtxn Y>C05?> Utility.log("Thread " + nThreadID + " is over!"); 9%21Q>Y?b bDownOver = true; dYOY8r/ //nPos = fileAccessI.write (b,0,nRead); )^P54_2
} k8J zey]X catch(Exception e){e.printStackTrace ();} oM>UIDCY_v } AMB{Fssz } J:'_S `J z80(+`
y5c\\e //打印回应的头信息 ,%A|:T] public void logResponseHead(HttpURLConnection con) 7MZH'nO { |_g7k2oLY for(int i=1;;i++) T9J&^I { E;`^`T40 String header=con.getHeaderFieldKey(i); ]jI<Js*F if(header!=null) OpazWcMoo //responseHeaders.put(header,httpConnection.getHeaderField(header)); +VQD' Utility.log(header+" : "+con.getHeaderField(header)); :Hb`vH3x else /?
d)01 break; _R]0S } }M(xN6E } qGhg?u"n: ?Hdu=+ZV ) x+edYw public void splitterStop() n(V{ [ { )RTWt` bStop = true; nVoWER: } _pb*kJ 8G$BQ 9iJ$M! } wA7\K~fHV zp:QcL" ~s-gnp /* tBJ4lb **FileAccess.java RcJtVOrd *//文件访问(定位,写) )2l @%?9 package NetFox; Yj bp: import java.io.*; ,)dlL tUm /zXOtaG V'RbTFb9Z public class FileAccessI implements Serializable{ ~a4Y8r }pf|GdL //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 pl[@U<8aw RandomAccessFile oSavedFile; F
=*4]O long nPos; }%PK %/ zI o_b3G |ssl0/nk public FileAccessI() throws IOException >r\GB#\5 { _OjZ>j<B. this("",0); du~V=%9 } h*40jZ YL!{oHs4 '
=5B public FileAccessI(String sName,long nPos) throws IOException Id`V`|q { Nr]Fh oSavedFile = new RandomAccessFile(sName,"rw"); Sx
J0Y8#z this.nPos = nPos; oj{CNa oSavedFile.seek(nPos); \1<|X].jNY } !"yr;t>|Zb 7T6Zlp 5y
g`TW public synchronized int write(byte[] b,int nStart,int nLen) ?Be}{Qqlg { aaKf4} int n = -1; W 2[]m>; try{ (K8Ob3zN_ oSavedFile.write(b,nStart,nLen); t_!p({ n = nLen; 0fvOA*UP } QD3tM5(Yr catch(IOException e) })70S8k { uJH[C> e.printStackTrace (); \X\f~CB } |
?vm.zp eC%Skw Cy/VH"G= return n; eCsk\f` } <},JWV3 &wY$G! P 8TAJ#Lm } <B0f Xj{fM\,"9 M!i|,S /* \5! 7zPc **SiteInfoBean.java NZ i3U */ g<;::'6 package NetFox; ,e9M%VIu6[ IaSpF<&Y; <>{m+=gA public class SiteInfoBean { MYjc6@=cR ojlyW})$% *-5N0K<kQ private String sSiteURL; //Site's URL Q0K$ZWM`7 private String sFilePath; //Saved File's Path .?QYqGcG private String sFileName; //Saved File's Name N2'aC}
I private int nSplitter; //Count of Splited Downloading File %>=6v}f,+ P[G>uA>Z1 # >bj6< public SiteInfoBean() :EQ{7Op` {//nSplitter的缺省值为5 B1!xr-kC //default value of nSplitter is 5 >O24#!9XW this("","","",5); 0'Ho'wDb } , p~1fB-/ J+E,Ui ZU }]mxKz public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Kd^.>T- { yCN_vrH> sSiteURL= sURL; [H<TcT8 sFilePath = sPath; /QyKXg6)l sFileName = sName; G'G8`1Nj this.nSplitter = nSpiltter; /<8y> qT(6T P Ws`ndR } uz{RV_IX7 rq8 d}wj lcm[l public String getSSiteURL() >god++,o { _7;:*'>a4 return sSiteURL; 8vR_WHsL } ; iia?f1 y{hy7w' d =gQ9>An public void setSSiteURL(String value) 1F`jptVQ\G { Px=@Tw N, sSiteURL = value; ;mk[! } }H\I[5* 1\&j)3mC ]1<GZ` public String getSFilePath() 9/(jY$Ar { v}Ju2 }IK return sFilePath; rjK`t_(= } u7[}pf$} sg^|dS{3D w(6n public void setSFilePath(String value) <8^x
Mjc { k[ro[E sFilePath = value; 0Z8"f_GK } E(PBV 8\lh'8 ciS, public String getSFileName() 6qH0]7m aI { <R /\nY Xz return sFileName; >UaQ7CRo } /gZyl|kdy Df^F)\7!N? '&![h7B public void setSFileName(String value) ~pQN#C)CO> { /qX?ca1_4^ sFileName = value; 'V]&X.=zC } "G K9Y ?FAI@4 !o /=,ZIx public int getNSplitter() Eu`|8# [ W { r!2U#rz return nSplitter; w]0@V}}u$o } [Vo5$w V9<`?[Usv RPW46l34 public void setNSplitter(int nCount) $mn0I69 { aZWj52 nSplitter = nCount; Z]]Ur } !,m } CP~ZIIip" \x}\)m_7M< IFp%Ta /* aaR& -M@ **Utility.java ;XurH%Mg */ 4a-JC" package NetFox; hF,|()E[ nMyl(kF[ #0P_\X`E public class Utility { H;1@]|sH# P0n1I7| "0An'7'm public Utility() VLez<Id9( { !#c'|
*k by/H:5}7 GXtK3YAr } qSc-V`* vQljxRtW //线程睡眠 gJ
\6cZD public static void sleep(int nSecond) gw]%:
WeH { ;miif try{ Q\N*)&Sd<M Thread.sleep(nSecond); r=H?fTY<3E } 0X=F(,>9 catch(Exception e) !!y]pMjJa@ { t}YcB`q) e.printStackTrace (); ?*fY$93O } vk92j? } b6N[t _, hx:q@[ +J/ //日志 X7},|cmD_ public static void log(String sMsg) _=GjJ~2n { V*giF`gq System.err.println(sMsg); r/j:A#6M]o } bv[#|^/ 9n&
&`r ?b;2PH" public static void log(int sMsg) $Nu{c;7" { F8f}PV]b System.err.println(sMsg); .[Sis<A]% } 1M]=Nv } ubcB<=xb 9TW[;P2> ) D=0YLQ*rP /* SMEl'y **TestMethod.java ]`/>hH>+~9 */ %QezC+n package NetFox; 1<YoGm& -s3`mc}* q+?<cjVg public class TestMethod { oD)]4| $w0TEO! YOl$sgg} public TestMethod() ?jmP]MM { ///xx/weblogic60b2_win.exe DrK]U}3fh" try{ 0!hr9Y]Lx SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :os8" //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \P<aK$g SiteFileFetch fileFetch = new SiteFileFetch(bean); +A|
Bc~2! fileFetch.start(); Q|'f3\ } J:Cr.K` catch(Exception e){e.printStackTrace ();} 4t,
2H" M aLa<zEssz D:z'`v0j } uvId],dQ5 A)f-r ,
>LJpv public static void main(String[] args) +fP.Ewi { -?Cr&!*B new TestMethod(); G:AA>t } 5\Q Tm; } p*;!5;OUR 点击下载更多相关资料
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