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/* w}zl=w{G **SiteFileFetch.java '!]ry< */ PPU,o8E+ package NetFox; kG[u$[B import java.io.*; yBXdj`bV import java.net.*; HDvj{ t/yGMR= _}:9ic]e public class SiteFileFetch extends Thread { (=}U2GD* M\ vj&T{k X3tpW`alo SiteInfoBean siteInfoBean = null; //文件信息Bean 1@"eeR long[] nStartPos; //开始位置 J
[J, long[] nEndPos; //结束位置 @QV|<NeH FileSplitterFetch[] fileSplitterFetch; //子线程对象 :/c=."z. long nFileLength; //文件长度 PaP47>( boolean bFirst = true; //是否第一次取文件 \|BtgT *$b boolean bStop = false; //停止标志 B_i@D?bTD File tmpFile; //文件下载的临时信息 |lm DataOutputStream output; //输出到文件的输出流
]hpocr 3kx/Q# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) i=OPl public SiteFileFetch(SiteInfoBean bean) throws IOException |!euty :: { 6AKH0t|4 siteInfoBean = bean; u3(zixb //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F-k3'eyY tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P6&@fwJ< if(tmpFile.exists ()) zGHP{a1O7 { j!B+Q bFirst = false; Bf~ read_nPos(); U=\ZeYK. } x[U/
8#f& else &?f{. { sDTCV8"w nStartPos = new long[bean.getNSplitter()]; 1`)ie%= nEndPos = new long[bean.getNSplitter()]; fWhw I+ } lZ.x@hDS JaoRkl?F 5"%r,GM U I7ZY9W(S } }` E5I&r4 Rx<m+= {Lwgj7|~ public void run() vz#VW { `of 5h*k //获得文件长度 j2\bCGY //分割文件 <k-&Lh:o3 //实例FileSplitterFetch =o^oMn //启动FileSplitterFetch线程 8ME_O~,N //等待子线程返回 2~Z P[wr try{ FPE[} if(bFirst) YHAhF@& { kA1]o nFileLength = getFileSize(); |6'(yn if(nFileLength == -1) ?lW-NPr { K:gxGRE System.err.println("File Length is not known!"); Vz6p^kMB } GGo)k1T|) else if(nFileLength == -2) /)sA{q
4 { qqA(Swe)T System.err.println("File is not access!"); }&BE*U8_ } rCR?]1*Z
else (Gr8JpV { O]>9\!0{ for(int i=0;i<nStartPos.length;i++) q4'szDYO2 { fw$/@31AP? nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;wwhW|A } 8!2NZOZOS for(int i=0;i<nEndPos.length-1;i++) 9\ZlRYnc= { Yf:xM>.% nEndPos = nStartPos[i+1]; };6[Byf } DXu#07\ nEndPos[nEndPos.length-1] = nFileLength; {R%v4#nk } Kmc*z (Q } ~Mbo`:>(4v NBEcx>pma 1wP#?p)c //启动子线程 h}r* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; rCU f,) for(int i=0;i<nStartPos.length;i++) k ,wr6>'Vt { GjN/8>/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Vp{! Ft8> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GEj/Z};;[b nStartPos,nEndPos,i); QH@?.Kb_qU Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "| cNY_$&s fileSplitterFetch.start(); d
4w+5H"u } FDBj<uXfM| // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ts%XjCN[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;#$ 67G$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", WP[h@#7< nEndPos = " + nFileLength); 4>eY/~odq] // fileSplitterFetch[nPos.length-1].start(); !)gTS5Rh: 6$$4!R- c<- F_+[ //等待子线程结束 lx_jy>$}r //int count = 0; n6D9f~8" //是否结束while循环 1><@$kVMm~ boolean breakWhile = false; y|X</3w Z BjyQ4h hr3RC+ y while(!bStop) 2f>G { "[M,PI!B write_nPos(); Gu[G_^> Utility.sleep(500); lz=$Dz breakWhile = true; LA &W@ \) DJo )7!q>^S{B for(int i=0;i<nStartPos.length;i++) Jm8{@D% { gZ
vX~ if(!fileSplitterFetch.bDownOver) 9n4vuBgv { 5-'jYp/ breakWhile = false; uqe{F+;8& break; 7i^7sT8t } h0}r#L } 4UwXrEQp if(breakWhile) c6/+Ye =h break; Wy1#K)LRb &Ui*w% IxN0m7 //count++; _2u RY //if(count>4) _+Tq&,_:o // siteStop(); ^ [FK<9 } lh^-L+G:Ok L3}n(KAJj M~%~y`D^ System.err.println("文件下载结束!"); N3/G6wn } vEQw`OC catch(Exception e){e.printStackTrace ();} qJV2x.! } 'YQ^K`lV ;Z>u]uK4+ .axJ '*~W //获得文件长度 3sr>?/>: public long getFileSize() `;KU^dH { CB V(H$d int nFileLength = -1; ,liFo.kT8% try{ w_zUA'n+ URL url = new URL(siteInfoBean.getSSiteURL()); ZqT8G HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); R\DdU-k httpConnection.setRequestProperty("User-Agent","NetFox"); J)(KG dk {2jetX`@h <X@XbM int responseCode=httpConnection.getResponseCode(); w7Fz(`\ if(responseCode>=400) )}ygzKEa { }U <T>0 processErrorCode(responseCode); uWm,mGd9 return -2; //-2 represent access is error G bW1Lq&" } t~_j+k0K# `zf,$67>1 2I:x) String sHeader; wxC&KrRF (4:&tm/; ^G:}%4 for(int i=1;;i++) j}P
xq { ~V#MI@]V~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); a^:on?:9 //Utility.log(in.readLine()); DJ&ni` sHeader=httpConnection.getHeaderFieldKey(i); 9Q\CJ9 if(sHeader!=null) 4wLN#dpeEy { iYbp^iVg if(sHeader.equals("Content-Length")) NMaZ+g!t( { x<&2`= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Std?p{
i break; $H\[yg>4 } PSCzeR } 6( #fGH&[ else d_t> break; n*(9:y=l1 } GjVq"S } 8w,+Y]X<P[ catch(IOException e){e.printStackTrace ();} d yH<D5
catch(Exception e){e.printStackTrace ();} ~H<oqk:O-
qW~Z#Si >WYiOXYv Utility.log(nFileLength); LWH(bs9U 7TDt2:;] R'Gka1v return nFileLength; VkFvV><" } MTnW5W-r9 #6g9@tE >z{*>i,m1 //保存下载信息(文件指针位置) oe (})M private void write_nPos() 4KbOyTQ { 6_UCRo5h% try{ TRLz>m Q output = new DataOutputStream(new FileOutputStream(tmpFile)); nK!yu?mS output.writeInt(nStartPos.length); e6G=Bq$ for(int i=0;i<nStartPos.length;i++) 1gK<dg { c>SFttbU // output.writeLong(nPos); 5Z8Zb. output.writeLong(fileSplitterFetch.nStartPos); +qPpPjG; output.writeLong(fileSplitterFetch.nEndPos); ,\){-H/n } J#1-Le8@ output.close(); U-~6<\Mf } $ ,:3I*}be catch(IOException e){e.printStackTrace ();} w^Mj[v# catch(Exception e){e.printStackTrace ();} 2SjH7
' } z (1zth dM-qd` !O*'mX //读取保存的下载信息(文件指针位置) kdgU1T@y. private void read_nPos() 0f_+h %%= { 5{z muv: try{ \C{Dui)F DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 7dm:L'0 int nCount = input.readInt(); H[WsHq;T+9 nStartPos = new long[nCount]; Uzi.CYVs% nEndPos = new long[nCount]; ol[sX=5 * for(int i=0;i<nStartPos.length;i++) UO1WtQyu,H { FRBW(vKE nStartPos = input.readLong(); v|K, nEndPos = input.readLong(); !g`^<y! } 54lU~ " input.close(); kT@m*Etr{ } DPWt=IFU catch(IOException e){e.printStackTrace ();} l1 M
% catch(Exception e){e.printStackTrace ();} AfAlDM' } h0cdRi Vx
Vpl@ (^{tu89ab private void processErrorCode(int nErrorCode) '3i,^g0?t0 { ]2_b_ok System.err.println("Error Code : " + nErrorCode); _ww>u""B~ } m}-*B1 S3?Bl' ]NEr]sc-"F //停止文件下载 cD%_+@GaU public void siteStop() S|jE1v"L { L2sUh+'| bStop = true; o^efeI for(int i=0;i<nStartPos.length;i++) gTM*td(~^ fileSplitterFetch.splitterStop(); [
pe{,lp 7^oO
N+=d |#b]e|aP } 5V $H?MW> } mi';96 //负责部分文件的抓取 LJ8 t@ui **FileSplitterFetch.java gh?3 [q6 */ Nc da~h
Q package NetFox; g7UZtpLTm Xf YbWR MwuRxeRO- import java.io.*; WR.>?IG2E import java.net.*; >iV2>o _ +QW|8b '=WPi_Z5:C public class FileSplitterFetch extends Thread { ez-jVi-Fi w-j^jU><3 L-9AJk>V String sURL; //File URL c%+_~iBUN long nStartPos; //File Snippet Start Position o#Viz: long nEndPos; //File Snippet End Position <G_71J`MLC int nThreadID; //Thread's ID zk;'`@7 boolean bDownOver = false; //Downing is over 5Ic'6AIz boolean bStop = false; //Stop identical @ *<`*W FileAccessI fileAccessI = null; //File Access interface 'PqKb%B| ~Fe$/*v <-h[I&." public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {y%|Io`P { '>^!a!<G this.sURL = sURL; !jTxMf
this.nStartPos = nStart; h}U>K4BJ this.nEndPos = nEnd; Wt M1nnJp nThreadID = id; B'v~0Kau fileAccessI = new FileAccessI(sName,nStartPos);//定位 @kPe/j/[1 } fq[1 |Q 1xD?cA\vu K%g_e*"$ public void run() |
9 <+!t\ { 1KadT7<0} while(nStartPos < nEndPos && !bStop) @$|8zPs { t ch;_7? M{jJ>S{g 4M)oA|1w try{ $vLGX>H URL url = new URL(sURL); VvUP;o&/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i*)BFV_- httpConnection.setRequestProperty("User-Agent","NetFox"); VZ]}9k String sProperty = "bytes="+nStartPos+"-"; tc|PN+v; httpConnection.setRequestProperty("RANGE",sProperty); CklIrD{ Utility.log(sProperty); d6f T UlMc8 z b:Tv
Ta InputStream input = httpConnection.getInputStream(); mo D)^':. //logResponseHead(httpConnection); 6W/uoH=; ;w<r/dK O9P4r*prA byte[] b = new byte[1024]; 0<)Ep~! int nRead; [85b+SKW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) C({r1l4[D { lyzM?lK- nStartPos += fileAccessI.write(b,0,nRead); .3CQFbHF //if(nThreadID == 1) `$Y%c1; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
<64#J9T^ } _&RGhA fP/;t61Z ;3\'}2^|l Utility.log("Thread " + nThreadID + " is over!"); 8xt8kf*k bDownOver = true; 4jw q$G //nPos = fileAccessI.write (b,0,nRead); _/NPXDL } c{3P|O&. catch(Exception e){e.printStackTrace ();} U.Fs9F4M # } F*JbTEOn } jGUegeq }p>l,HD s[;1?+EI //打印回应的头信息 "9IR| public void logResponseHead(HttpURLConnection con) X2mZ~RB(p { pD]2.O for(int i=1;;i++) )S9}uOG# { 4xF}rm String header=con.getHeaderFieldKey(i); cp&1yB
if(header!=null) ge ]Z5E(1 //responseHeaders.put(header,httpConnection.getHeaderField(header)); tP89gN^PA| Utility.log(header+" : "+con.getHeaderField(header)); }\QXPU{UVd else -U{!'e8YiN break; ETm:KbS } ~g}blv0q+B } lXRB"z MM*9Q`cB E
<N% public void splitterStop() ]Na; b { Ch)E:Dvq6 bStop = true; "8
?6;!, } 3$3%W<&^ bD=R/yA ;!j/t3#a } }O\g<ke:u
&MBm1T|Y kyf(V)APPu /* x@*?~1ai **FileAccess.java zp\_5[qJ; *//文件访问(定位,写) Pf~0JNnc package NetFox; *G[` T%g import java.io.*; Y=@iD\u
75iudki & j*Ylj} public class FileAccessI implements Serializable{ {KSy I# %reW/;)l{ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~FVbL-2 RandomAccessFile oSavedFile; L+Gi long nPos; uT
Y G/O A:\_ \B%< e 8^%}\F public FileAccessI() throws IOException .*?)L3n+t { f[q_eY this("",0); gX(8V*os^ } x[R?hS,0t X;v{,P=J 4M;S&LA public FileAccessI(String sName,long nPos) throws IOException Pr,C)uch { }Qh%Z) oSavedFile = new RandomAccessFile(sName,"rw"); knzQ)iv&& this.nPos = nPos; ]''tuo2g8 oSavedFile.seek(nPos); bd3>IWihp } #fFD|q qnzNJ_ `R Q'[~$~&` public synchronized int write(byte[] b,int nStart,int nLen) ?sxf_0* { I#xhmsF int n = -1; r#d]"3tH try{ Xy9'JVV6 oSavedFile.write(b,nStart,nLen); ;1k_J~Qei n = nLen; Q;@w\_OR } HS|x catch(IOException e) :I^4ILQCD { M#yUdl7d e.printStackTrace (); qJ$S3B } xzRC % ]@qD4: [n +( return n; cGWL'r)P } 17VNw/Y 0.#%KfQ zu1gP/ } !9^GkFR6n +EZr@ F|&mxsL /* eXdH)|l,\ **SiteInfoBean.java *T{KpiuP */ '=IuwCB|; package NetFox; ^fM=|.? l4OPzNc' *}LQZFrnX public class SiteInfoBean { _K~?{". +*RpOtss +@PZ3
[s private String sSiteURL; //Site's URL K$M,d-
`b private String sFilePath; //Saved File's Path & aF'IJC private String sFileName; //Saved File's Name FFH{#|_1 private int nSplitter; //Count of Splited Downloading File 94XRf"^ )
|hHbD^V Uzk_ae public SiteInfoBean() cr{dl\Na {//nSplitter的缺省值为5 hy:K) _
//default value of nSplitter is 5 bre6SP@ this("","","",5); dRTpGz } <pUc(
tPoz j MA%`*r _[
`"E' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 98WJ"f_ # { !v 3wl0 sSiteURL= sURL; 4 W+ nSv sFilePath = sPath; gwYTOs^ sFileName = sName; g:"Hg-s this.nSplitter = nSpiltter; wD[qE wSs78c= ;<` } 3lNw*M|") uMP&.Y( L^nS%lm public String getSSiteURL() Xg97[ I8/ { < YuI}d~' return sSiteURL; \y/+H } JDC,] 5TdI W&^2Fb public void setSSiteURL(String value) M~!LjJg; { B?_ujH80m sSiteURL = value; m<22E0=g } Q&9& )8- @aGS~^Uh Mq,_DQ public String getSFilePath() Eb9M;u { P^*gk P return sFilePath; :Ee5:S } fKT(.VNq5 GgjBLe=C 6d/b*,4[ public void setSFilePath(String value) 3!B3C(g { HjN )~<j sFilePath = value; 6_a.`ehtj< } 5(OF~mX# uO-R:MC /h%MWCZWm^ public String getSFileName() oDas~0<oh { 8%#uZG\} return sFileName; BF6H_g } ihhnB E0S[TEDa] sw &sF public void setSFileName(String value) XC{(O:EG { }c,}+{q sFileName = value; AuYi$?8|5 } I!Za2? `P4qEsZE>` gf2w@CVF>= public int getNSplitter() )+9D$m=P; { rQ$A|GJ L return nSplitter; cWM|COXL+ } I@q>ES!1H g^En6n) aa1XY&G"! public void setNSplitter(int nCount) OiY2l;68 { c#;LH5KI nSplitter = nCount; "Hjw } 4%j&]PASa1 } |qNrj~n@ LGCL*Qbsg Sb[rSczS~ /* @;,O V&XYn **Utility.java jIc;jjAF */ zFuUv_t package NetFox; [%nG_np z(orA} [ emS +%6U public class Utility { k*c:%vC! [I4FU7mpH MgMLfgt"V public Utility() 7<^D7 { KwQO,($,] )SUN+YV^ Q84KU8?d } ,em6wIq, W@$p'IBwm //线程睡眠 ;+b}@e public static void sleep(int nSecond) ]:E]5&VwV} { '\*Rw]bR| try{ rrwsj` Thread.sleep(nSecond); TcfBfscU } Jp-ae0 Ewa catch(Exception e) X)f"`$ { |f?C*t', e.printStackTrace (); *u{.K:.I } 1v\-jM" } IfXLnD^|| fF[ g%?w //日志 rw\4KI@ L public static void log(String sMsg) H@j ^, { b);}x1L.T System.err.println(sMsg); i)(QNpv } Ju9v n44 ^:)&KV8D| wbS++cF< public static void log(int sMsg)
610k#$ { ^&rbI,D System.err.println(sMsg); S~Hj.
d4/ } $^0YK|F } Csc2 yI%3 1aT$07G0 d|NNIf /* d<3"$%C **TestMethod.java z"O-d<U5 */ e #OU {2X package NetFox; [1UqMkXtf 6kuSkd$. $WPN.,7 public class TestMethod { YWZF*,4 Mk9kGP% x/S% NySG public TestMethod() tQ}gBE63 { ///xx/weblogic60b2_win.exe z*[Z: try{ j{Fo 6## SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~3YNHm6V //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5k(#kyP SiteFileFetch fileFetch = new SiteFileFetch(bean); 68!fcK fileFetch.start(); vxt^rBA } ,RHHNTB(" catch(Exception e){e.printStackTrace ();} A{o{o++ mHMej@ vPsX!m[# } KE3v3g< o <'gM]$ ]/']{*T1 public static void main(String[] args) D_)vGvv3;. { T:&+#0< new TestMethod(); N.`]D)57 } @&W?e?O ~G } ~GeYB6F 点击下载更多相关资料
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