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/* )$MS
0[? **SiteFileFetch.java g+:$X- r */ #N; $ package NetFox; [fd~nD#. import java.io.*; }'u3U"9) import java.net.*; .8-PB*vb )8:n}w K3Huu!Tr public class SiteFileFetch extends Thread { [0K=I64
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, :Jt Q?Wr7 SiteInfoBean siteInfoBean = null; //文件信息Bean OdO{xG G@ long[] nStartPos; //开始位置 {PL,VY)Z long[] nEndPos; //结束位置 BeAk21xb FileSplitterFetch[] fileSplitterFetch; //子线程对象 7^HpVcSM long nFileLength; //文件长度 rZ pbu>S boolean bFirst = true; //是否第一次取文件 C=8H)Ef,l boolean bStop = false; //停止标志 8a7YHUL<3i File tmpFile; //文件下载的临时信息 QT_Srw@ DataOutputStream output; //输出到文件的输出流 L+_8QK < wbBE@RU>! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) C2NzP & FD public SiteFileFetch(SiteInfoBean bean) throws IOException QDP-E[ { SzRL}}I siteInfoBean = bean;
1U //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); S<*' ;{5~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); I`lDWL if(tmpFile.exists ()) ~Hs=z$ { cnbo+U bFirst = false; HTw#U2A;+ read_nPos(); =+`D } *<w3" iq else o.v2z~V { #sL/y nStartPos = new long[bean.getNSplitter()]; 0xv\D0 nEndPos = new long[bean.getNSplitter()]; \Ph]*% } @sN^BX`z E{<?l 7t "=FIFf g/x_m. } "X`Qe!zk4 AYt*'Zeg!s !`Le`c public void run() CK=ARh#|
{ Xp#~N_S$ //获得文件长度 /GyEV Cc //分割文件 ZH% we //实例FileSplitterFetch Ohc^d"[7 //启动FileSplitterFetch线程 hRk,vB] //等待子线程返回 W.IH#`-9E try{ cFw3Iw"JJ if(bFirst) B+|IZoR { %,XI]+d nFileLength = getFileSize(); ^+EMZFjg( if(nFileLength == -1) QJQJR/g { D_Guc8* System.err.println("File Length is not known!"); n7@j}Q(&? } @$Yb#$/ else if(nFileLength == -2) rj}(muM,R { Mg+4huT System.err.println("File is not access!"); -gB{:UYi3 } !1("(Eb else !W(`<d]68: { lelMt= for(int i=0;i<nStartPos.length;i++) SGQDro=l { =ydpU<aS nStartPos = (long)(i*(nFileLength/nStartPos.length)); <W?WUF } 7O"hiDQ for(int i=0;i<nEndPos.length-1;i++) &h\7^=s. { _OLI%o nEndPos = nStartPos[i+1]; yk`)Cq%=; } s_TD4~
$ nEndPos[nEndPos.length-1] = nFileLength; XYMxG: } FQ1arUOFW, } C]M7GHe1q &"xQ~05
SijS5irfk //启动子线程 $ND90my fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q]^Yi1PbS for(int i=0;i<nStartPos.length;i++) <;aJ#qT { !KAsvF,j fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A4}#U=3tI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .izf#r:< nStartPos,nEndPos,i); %TDXF_.[ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]b> pI; fileSplitterFetch.start(); (ZS/@He } *l:&f_ngV // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fwy"w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); L*9H#%3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", bK?MT]%}r nEndPos = " + nFileLength); *{Yh6{ // fileSplitterFetch[nPos.length-1].start(); K\~v& ^:+Rg}]W^ ~oo'ky*H! //等待子线程结束 J+lGh9G //int count = 0; sSz%V[XWL //是否结束while循环 %/Bvy*X& boolean breakWhile = false; 0lBat_<8 ldYeX+J
_ i2`# while(!bStop) }DbE4"^K7 { 'd+:D' write_nPos(); i0iez9B
Utility.sleep(500); .N!{ U breakWhile = true; 6W$rY] h! FZH-q!"^cK Ajg\aof0{ for(int i=0;i<nStartPos.length;i++) ?3Pazc]+| { JA< :K0 if(!fileSplitterFetch.bDownOver) qv$!\ T { H }B2A" breakWhile = false; SYeE) mI
break; `2,a(Sk# } M}u1qXa } oE6|Zw if(breakWhile) Fav^^vf*1 break; -w\M-wc/$ ljuNs@q 5tMh/]IeS //count++; $HxS:3D%D //if(count>4) b9DR%hO: // siteStop(); GY9y9HNZ } o(zTNk5d =!<^^6LZ ODek%0= System.err.println("文件下载结束!"); &>g~-s } N2[jO+6 catch(Exception e){e.printStackTrace ();} *Wso3 6an } p&\K9hfi dHq# McP~}"!^ //获得文件长度 :PUK6,"5]O public long getFileSize() >(OYK}ZN { HS7_MGU int nFileLength = -1; ^&-a/'D$, try{ (_U^ URL url = new URL(siteInfoBean.getSSiteURL()); -,|ha>r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nc&Jmo7 httpConnection.setRequestProperty("User-Agent","NetFox"); _[F@1NJ BJgDo >T QZk4$ int responseCode=httpConnection.getResponseCode(); S~> 5INud if(responseCode>=400) yhwy>12,K { #)`\!)? processErrorCode(responseCode); IkU|W3Vo return -2; //-2 represent access is error Dp`HeSKU^ } &wb9_?ir- !)nD xM`p [Y$V\h=V String sHeader; d/lffNS= aHC%19UN 9T?64t<Ju for(int i=1;;i++) f1J%]g! { r6MB"4xd //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); V_f`0\[x //Utility.log(in.readLine()); R1/q3x sHeader=httpConnection.getHeaderFieldKey(i); GG+5/hU if(sHeader!=null) xDUaHE1co { P5Dk63z] if(sHeader.equals("Content-Length")) AEqq1A { 7`dY 1.rq nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); _ eiF@G break; 8%-%AWF] } Hd374U<8]T } BGzO!s*@j else lJ&y&N<O break; O|7yP30?M } R6<4"?*r } Cg3ODfe catch(IOException e){e.printStackTrace ();} H-2_j catch(Exception e){e.printStackTrace ();} 9n 6fXOC h0lu!m#\_ nE7JLtbH Utility.log(nFileLength); SOj`Y|6^: 7k~Lttuk ]F+K|X9- return nFileLength; 1`QsW&9=b } lQL:3U0DjU :Y^I]`lR" ]u0Jd#@ //保存下载信息(文件指针位置) PQ3h\CL1n private void write_nPos() dyO E6Ex { fI]b zv; try{ qtY
m!g output = new DataOutputStream(new FileOutputStream(tmpFile)); \8>oJR 6 output.writeInt(nStartPos.length); F@EJtwLd5y for(int i=0;i<nStartPos.length;i++) >A=\8`T^ { 8lb-}= // output.writeLong(nPos); <xqba4O output.writeLong(fileSplitterFetch.nStartPos); I7zn>^0} output.writeLong(fileSplitterFetch.nEndPos); JiA'BEJN } v)+@XU2wZ output.close(); uy9!qk } ]Uh1l.O catch(IOException e){e.printStackTrace ();} 11{y}J catch(Exception e){e.printStackTrace ();} !^L-T?y.2 } )*D'csGc +v-LL*fa |!}wF}iLc) //读取保存的下载信息(文件指针位置) pX_b6%yX( private void read_nPos() F~R7~ZE { +$,dwyI2t try{ >|nt2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); HTR1)b int nCount = input.readInt(); 7xT[<?, nStartPos = new long[nCount]; Ow)R|/e/ nEndPos = new long[nCount]; R&Ci/ for(int i=0;i<nStartPos.length;i++) no|Gq>Xp { TY6
rwU nStartPos = input.readLong(); |[LE9Lq/ nEndPos = input.readLong(); jyQVSQs } ,C:o`fQ\ input.close(); $3#%aA!(# } C{&)(#*L catch(IOException e){e.printStackTrace ();} K'Spbn!nC catch(Exception e){e.printStackTrace ();} 0H+c4IW } #8UseK "i%jQL'. [b;Uz|o private void processErrorCode(int nErrorCode) -l[jEJS} { km4g}~N</ System.err.println("Error Code : " + nErrorCode); 9I kUZW } 9|3o< Z
Xb}R^O- zo44^=~% //停止文件下载 hVf^ public void siteStop() ERC<Dd0 { =fWdk\Wv bStop = true; vi|Zit for(int i=0;i<nStartPos.length;i++) > UWStzH< fileSplitterFetch.splitterStop(); ZAeQ~ j~ (}"S)#C PpFsp( )x } !
Rvn'|! } e1uMR-Q //负责部分文件的抓取 Pb4q`! **FileSplitterFetch.java ]3+`` vL */ 5Eal1Qu package NetFox; }p*?1N O9e.=l Abf1"#YImy import java.io.*; GX5W^//} import java.net.*; liD47}+ `xIh\q tW(+xu36 public class FileSplitterFetch extends Thread { S&01SX6 `Cg ^in\ @yKZRwg String sURL; //File URL rS,j;8D- long nStartPos; //File Snippet Start Position xlw 2g<s long nEndPos; //File Snippet End Position p8>R#9 int nThreadID; //Thread's ID (:OHyeNt boolean bDownOver = false; //Downing is over ohsH 2]C boolean bStop = false; //Stop identical qiU5{} FileAccessI fileAccessI = null; //File Access interface :k N5?t= VA2<r(y~(
,CKvTxz0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QnU0"_- { r--;yEjWE this.sURL = sURL; Fr;lG this.nStartPos = nStart; $T/#1w P this.nEndPos = nEnd; Yrsp%<qj nThreadID = id; =GTD"*vwr fileAccessI = new FileAccessI(sName,nStartPos);//定位 _[JkJwPTx } 4=s9A {MxnIg7' :'Xr/| s public void run() S.hC$0vrj { <I1y while(nStartPos < nEndPos && !bStop) 045\i[l= { L=m:/qQL a2X h>{ zAI|Jv@ try{ 5[<F_"x URL url = new URL(sURL); OpqNEo\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); GA ik;R httpConnection.setRequestProperty("User-Agent","NetFox"); 8f-:d] String sProperty = "bytes="+nStartPos+"-"; ;dOs0/UM& httpConnection.setRequestProperty("RANGE",sProperty); @G(xaU'u Utility.log(sProperty); JCcQd01z
{,Fcd(MU r{Z[xWIX InputStream input = httpConnection.getInputStream(); Q"'V9m7
i //logResponseHead(httpConnection); zDd5cxFdZ OHhs y|W I+~bCcgPi byte[] b = new byte[1024]; eJ:Yj
~X`< int nRead; NQR^%<hU while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pns+y { 1MV@5j nStartPos += fileAccessI.write(b,0,nRead); !;+U_j'Pg //if(nThreadID == 1) ob]dZ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ] R<FKJ[ } 2Y;!$0_rv Aqu]9M~ 5%&] Utility.log("Thread " + nThreadID + " is over!"); H!. ZH(asY bDownOver = true; '=@r7g.2 //nPos = fileAccessI.write (b,0,nRead); H+R7X71{ } yZ~b+=UM catch(Exception e){e.printStackTrace ();} x
^[F]YU } 4oN${7k0 } ~v\hIm3=m s ^3[W0hL oXbI5XY)wb //打印回应的头信息 3G.r- public void logResponseHead(HttpURLConnection con) 1 KB7yG-#6 { #B}Qt5w for(int i=1;;i++) Jh^8xI,`C { [-]A^?yBM String header=con.getHeaderFieldKey(i); _25d%Ne0 if(header!=null) e{JVXc[D //responseHeaders.put(header,httpConnection.getHeaderField(header)); 6WO7+M;z Utility.log(header+" : "+con.getHeaderField(header)); :])JaS^ else 6e/7'TYwT break; 8sWr\&! } yl]UUBcQ } #]X2^ND47 e2bLkb3c %ZuLl( public void splitterStop() (Xj.iP { >|(%2Zl bStop = true; pX^=be_ } f)U6p 5}7ISNP;f p;e$kg1 } Ph
Ttx(! cyHU\!Z*Zq X\mz+al>[ /* IhwN],-V **FileAccess.java 2!idy]vy_ *//文件访问(定位,写) Mlwdha0 package NetFox; !3?yG import java.io.*; +0dT^Jkqg q-H&5K ;le0QA
Pf public class FileAccessI implements Serializable{ c(E,&{+E /:KQAM0 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?CFoe$M RandomAccessFile oSavedFile; tJz^DXqAc long nPos; {!y<<u1 ]K*GSU "]UIz_^'`U public FileAccessI() throws IOException MISE C[/ { @sdS0pC this("",0); 19) !$Hl } R|-j]Ne V pH|R *k4+ioFnKE public FileAccessI(String sName,long nPos) throws IOException L W?&a3e { V $>"f( oSavedFile = new RandomAccessFile(sName,"rw"); ~ttKI4 this.nPos = nPos; ]xYa yN!n oSavedFile.seek(nPos); 3AvcJ1 } OiF ]_" x*J|i4 oAaf)?8 public synchronized int write(byte[] b,int nStart,int nLen) G\):2Qz!| { ;&q]X]bJ int n = -1; ?l>e75V%w try{ 2$3kKY6$e oSavedFile.write(b,nStart,nLen); aTX]+tBoe n = nLen; /xJY7yF } *.xZfi_| catch(IOException e) VT
Vm7l { BPqwDjW e.printStackTrace (); g/6nwa
} a 1NCVZ @| P3 _Po#ZGm~ return n; T*8_FR < } ;NBT 4 D*qzNT@`LR J7_8$B-j7 } N:d
D*[QZ PJ}[D.elO \k4M{h6 /* `P#8(GU **SiteInfoBean.java dbg|VoNf */ tgc@7 package NetFox; ea>[BB3# [1mIdwS bIq-1
Y( public class SiteInfoBean { <jg8y'm@0 z}D#WWSxf @|Z*f\ private String sSiteURL; //Site's URL yTP[,bM private String sFilePath; //Saved File's Path
-GK 'V private String sFileName; //Saved File's Name 5vYsA1Z private int nSplitter; //Count of Splited Downloading File 3/:LYvM< >d'EInSF qq/_yt public SiteInfoBean() jzQ9zy_ {//nSplitter的缺省值为5 xTGP //default value of nSplitter is 5 cK/PQsMP this("","","",5); G;Us-IRZ } 1O|RIv7F[/ O.dux5lfBd |b,zw^!e[' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Dxz5NW4 { C CLfvex sSiteURL= sURL; eK\|SQb sFilePath = sPath; py}.00it sFileName = sName; 0@:Y>qVa this.nSplitter = nSpiltter; O~nBz):2 38<~R t]gq+ c Lo } G[y&`Qc)G ]<Z&=0i# 9 S[ws0Y60 public String getSSiteURL() *1R##9\jU7 { ~>.awu+o| return sSiteURL; neK*jdaP } ,o4r,.3[s S$Qr@5 4RlnnXY public void setSSiteURL(String value) _, 11EeW@ { iZsau2K sSiteURL = value; #/\pUK~km } u!m,ilAnd PXOq# dCW0^k public String getSFilePath() {K< ~
vj; { Hf!9`R[ return sFilePath; b,=,px } ;jp6 }zfI R (t!xf ;b{pzIe= F public void setSFilePath(String value) XCKY
xv& { .LWOM8) sFilePath = value; |^
2rtI } QJ[(Y@ O6a C]aOgt/U ru#T^AI*^ public String getSFileName() Z $ p^v*y { )6PJ*;p- return sFileName; ,?P8m" } Lw!?T(SK K<Yn_G mrhsKmH public void setSFileName(String value) 2<p5_4"-U* { @1/Q sFileName = value; $71i+h]_ } fhVbJU 5q0BG!A%T xc:`}4 public int getNSplitter() olUqBQ&ol { #fJ/KYJU return nSplitter; uzat."`d' } _|Y.!ZRYP !7kAJG g <=B1"'\ public void setNSplitter(int nCount) IM l9\U { b(+w.R(+Ti nSplitter = nCount; ,%"\\#3S } g~bf! } BH.:_Qrbh[ I,?Fqg'sq 9n06n$F /* l}U~I
3}). **Utility.java [)C)p*!Y) */ c,b`N0dOKL package NetFox; c,g]0S?gu ,3fuX~g ~v{C6) public class Utility { ?qq!%4mTB gxBl1 o|b[(t$;O public Utility() "@UU[o { $1Q3Y'Q9 F&nMI:h7 ~Q.8 U3" } /j=DC9_ ,}xpYq_/ //线程睡眠 Vq)|gF[6i public static void sleep(int nSecond) #`YxoY ` { z=- 8iks| try{ 4iL.4Uj{N Thread.sleep(nSecond); ~T;ajvJ } P?WT)C2)u catch(Exception e) $=@9 D,R { h4$OXKme? e.printStackTrace (); C+Fh$ } `uaD.m$EJ } cNuuzA '6dD^0dZ //日志 Jq$6$A,f public static void log(String sMsg) softfjl&l { '.}6]l System.err.println(sMsg); yNb#Ia } utFcFdX .:r2BgL iuH8g public static void log(int sMsg) qxg7cj2 { 7 ~% System.err.println(sMsg); Uy_}@50"l } LB64W ;#h } P?3YHa^up V5(tf' 5~kW-x /* cx1WGbZ **TestMethod.java jl 30\M7 */ sJjl)Qs)T package NetFox; ECE{xoc mPw56> z9);e8ck public class TestMethod { 8h@)9Q]d\ l/y
Kc8^< 4%#V^??E public TestMethod() &EbD.>Ci { ///xx/weblogic60b2_win.exe ;s!ns N try{ TGt1d SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #:Sy`G6!? //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -G^t-I SiteFileFetch fileFetch = new SiteFileFetch(bean); L(!!7B_, fileFetch.start(); NdXy%Q } kp<} catch(Exception e){e.printStackTrace ();} yEw"8u' cQ8$,fo )W}/k$S } 3 DO$^JJ. 1>*UbV<R;u 0[$Mo3c+' public static void main(String[] args) rz%[o,s { A aF5` new TestMethod(); kgbr+Yw2X } >1)@n3. <O } 1X!f!0=g+ 点击下载更多相关资料
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