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/* `PUGg[Zx^ **SiteFileFetch.java h.*v0cq: */ :Dj0W8V package NetFox; S?[@/35)
import java.io.*; 7C9_;81_Dt import java.net.*; /os,s[w }3}H} ,(A
$WT@e public class SiteFileFetch extends Thread { YvG=P<_xw TYKs2+S6 9Wv}g"KY0 SiteInfoBean siteInfoBean = null; //文件信息Bean (2ZkfN long[] nStartPos; //开始位置 [Qqomm.[\w long[] nEndPos; //结束位置 6E-AfY'< FileSplitterFetch[] fileSplitterFetch; //子线程对象 RuGG3"| long nFileLength; //文件长度 fgoLN\ boolean bFirst = true; //是否第一次取文件 6]sP" boolean bStop = false; //停止标志 WS ^,@>A File tmpFile; //文件下载的临时信息 f.Y [2b DataOutputStream output; //输出到文件的输出流 T jE'X2/ !$hi:3{U, //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I<rT\':9 public SiteFileFetch(SiteInfoBean bean) throws IOException )~ 0TGy| { mKBO<l{S siteInfoBean = bean; b+CJRB1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); lc$wjK[w[ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "WzKJwFr if(tmpFile.exists ()) ubv>*iO { Y$5uoq%p3A bFirst = false; w,az{\ read_nPos(); a D+4uGN } a*&(cn else q5G`q&O5 { {e5DQ 21. nStartPos = new long[bean.getNSplitter()]; iax0V nEndPos = new long[bean.getNSplitter()]; bd\%K`JQ{ } *M^<oG yv|`A2@9 f_2(`T# K3iQ/j~a q } bC/Ql Ew JNpecX TM5 Y(Q* public void run() EsS$th)d { L54]l^ls> //获得文件长度 61w
({F //分割文件 ob;O,&e0> //实例FileSplitterFetch \U3v5|Q //启动FileSplitterFetch线程 ?<` ;lu/eL //等待子线程返回 jU-aa+ try{ %Gl1Qi+Po_ if(bFirst) PIAE6,* { ed2r<H$ nFileLength = getFileSize(); !QpOrg if(nFileLength == -1) c'>_JlG~ { x"n++j System.err.println("File Length is not known!"); & 'CUc/, } npd:a Gx else if(nFileLength == -2) 15S&,$1& { y 2)W"PuG System.err.println("File is not access!"); I^n DO\m < } f92z/5%V else TlowEh8r { &1Cs' for(int i=0;i<nStartPos.length;i++) ,+5:}hR+ { &f}w&k2yj nStartPos = (long)(i*(nFileLength/nStartPos.length)); F{4v[WP) } $A`m8?bY for(int i=0;i<nEndPos.length-1;i++) dVUe!S` { W4,'?o nEndPos = nStartPos[i+1]; ('{aOiSH } CBv0fQtL nEndPos[nEndPos.length-1] = nFileLength; PXyv);#Q` } Ze[,0Y!u& } ?;y-skh HB{'MBs i),bAU!+m //启动子线程 'J$@~P fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9GRQ^E for(int i=0;i<nStartPos.length;i++) zn>+\ { wBvVY3VQ^
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =P%&]5ts siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
Q6RTH nStartPos,nEndPos,i); ;NH^+h Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vm[F~2+HX fileSplitterFetch.start(); |dz"uIrT } X5\xq+Ih // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xKl1DIN[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); M!kSt1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @H<*|3J nEndPos = " + nFileLength); ''(rC38 // fileSplitterFetch[nPos.length-1].start(); sQJGwZ7 m8;w7S7,j~ |Iw glb!k //等待子线程结束 |lcp
(u*u //int count = 0; ="5D}%
//是否结束while循环 c6lCF & boolean breakWhile = false; [_nOo ` m^0vux F(#?-MCs while(!bStop) $btu=_|f { cS'{h write_nPos(); zPxR=0| Utility.sleep(500); W7Y@]QMX breakWhile = true; ggL/7I( + c+i u6+" P6O\\,B1A for(int i=0;i<nStartPos.length;i++) 6UqAs<c9 { vJaWHC$q if(!fileSplitterFetch.bDownOver) h=0a9vIXF { P%)r4+at breakWhile = false; 6Iqy"MQuq break; pr,,E[ } )AxD|A } I/XSW # if(breakWhile) FuBt`H break; v7SYWO# 1*yxSU@uY e6>G8d //count++; SDC'S]{ew //if(count>4) N[e,%heR // siteStop(); 5 ty2e`~K } /IG{j} ROmmak(y8 lKw-C[ System.err.println("文件下载结束!"); B,cFvS } 4~&3.1 catch(Exception e){e.printStackTrace ();} vUVFW'- } y^,Q M[ & x};~8lGT>t 4"k &9+> //获得文件长度 ~f(5l. public long getFileSize() IJ&Lk=2E] { W-l+%T! int nFileLength = -1; xa@$cxt try{ X!qK[b@Z URL url = new URL(siteInfoBean.getSSiteURL()); o0]YDX@T HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nj'5iiV`] httpConnection.setRequestProperty("User-Agent","NetFox"); 5XUm} D$ Ga5*tWj :Y\ ~[Y int responseCode=httpConnection.getResponseCode(); **L&I5Hhm if(responseCode>=400) pX{wEc6} { 1,%`vlYv processErrorCode(responseCode); F5qA!jZ1] return -2; //-2 represent access is error Q{|%kU" } P,ueLG= H oABo: ?UAuUFueA String sHeader; dI
,A;. {KNaJ/:>W Vf&U`K for(int i=1;;i++) D9[19,2r` { T2MC`s|` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )b #5rQ //Utility.log(in.readLine()); o 2Nu@^+ sHeader=httpConnection.getHeaderFieldKey(i); [M[<'+^* if(sHeader!=null) 8Y.qP"s { ?!P0UTe~ if(sHeader.equals("Content-Length")) !i) !|9e { v?OVhV nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); lG\uJxV break; D,}bTwRb- } &liON1GLM } q* p else LDc EjFK( break; NgDhdOB } /"8e, } |@iM(MM[? catch(IOException e){e.printStackTrace ();} @W>@6E catch(Exception e){e.printStackTrace ();} =|]h-[P' 5[jcw` .oyAi|| Utility.log(nFileLength); P|<V0
Vs. "00j]e. ~j'D%:[+VH return nFileLength; 1`K-f
m) } i90 X0b-A 'z;(Y*jb Xx{| [2` //保存下载信息(文件指针位置) o>r
P\
private void write_nPos() {P8d^=#q { 4{YA[' try{ lH4Nbluc^ output = new DataOutputStream(new FileOutputStream(tmpFile)); x(TF4W=j output.writeInt(nStartPos.length); f?UI+TU for(int i=0;i<nStartPos.length;i++) k9}8xpH { %=UD~5!G0 // output.writeLong(nPos); 9jTBLp-i#N output.writeLong(fileSplitterFetch.nStartPos); }#FV{C] output.writeLong(fileSplitterFetch.nEndPos); wuH*a3( } +Ww] %`_ output.close(); MW7~=T } * @4@eQF catch(IOException e){e.printStackTrace ();} -`PziGl@< catch(Exception e){e.printStackTrace ();} H%O\4V2s } Y1-dpML [7I bT:ph [f_^BU& //读取保存的下载信息(文件指针位置) O`~#X w private void read_nPos() O JcS%-~ { YRlf U5 try{ KEOk%'c, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +>#SNZ[ int nCount = input.readInt(); 2T&MVl!% nStartPos = new long[nCount]; PY5 &Fwjc nEndPos = new long[nCount]; uCDe>Q4@/ for(int i=0;i<nStartPos.length;i++) jsN[Drr a { '5BD%#[ nStartPos = input.readLong(); TmG);B} nEndPos = input.readLong(); 7%Y`j/ } +-j-)WU?, input.close(); [Arf!W-QG } &>zH.6%$ catch(IOException e){e.printStackTrace ();} YCbvCw$Ob catch(Exception e){e.printStackTrace ();} sG`x |%t } X<L=*r^C,= >9{?]x SY+0~5E private void processErrorCode(int nErrorCode) fkZHy|m { I_r@Y:5{ System.err.println("Error Code : " + nErrorCode); Me.I>7c } s(=wG| $X#y9<bW <N vw*yA //停止文件下载 Vgm'&YT public void siteStop() IEhD5? { j L|6i-?! bStop = true; =
wD#H@ h for(int i=0;i<nStartPos.length;i++) /Q;wz!V$ fileSplitterFetch.splitterStop(); =-2~>B [./FzlA s ?@ oF@AEx= } KW .4 9 } cqG6di7# //负责部分文件的抓取 <+k&8^:bi **FileSplitterFetch.java EV?}oh"x */ H>CbMz1u package NetFox; =Wcvb?;* }p~2lOI l8oaDL\f import java.io.*; [Z$H<m{c- import java.net.*; B7 s{yb WQ9e~D" fQfn7FaW_\ public class FileSplitterFetch extends Thread { (.4lsKN< Tvx1+0Z%z d6J/)nl String sURL; //File URL OD8
fn long nStartPos; //File Snippet Start Position aFTWzz long nEndPos; //File Snippet End Position Zonjk%tC int nThreadID; //Thread's ID ;QBS0x\f@ boolean bDownOver = false; //Downing is over : "85w#r boolean bStop = false; //Stop identical s)E \ FileAccessI fileAccessI = null; //File Access interface }X)vktE+| 296}LW
["3dr@T9Z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &&&-P\3 { 4,)9@-|0R this.sURL = sURL; u9!
? this.nStartPos = nStart; ]DVr-f
~ this.nEndPos = nEnd; \qG?'Iy nThreadID = id; bIU.C|h@ fileAccessI = new FileAccessI(sName,nStartPos);//定位 p[Po*c.b } y#GHmHeh Cy;UyZ q}LDFsU public void run() lbHgxZ { dbby.% while(nStartPos < nEndPos && !bStop) QHNyH { ?Lg(,-: KwL_ae6fV zy,SL
|6: try{ Xd(^7~i URL url = new URL(sURL); RDdnOzx HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ev7.! httpConnection.setRequestProperty("User-Agent","NetFox"); al2lC#Sy String sProperty = "bytes="+nStartPos+"-"; xgk~%X%K httpConnection.setRequestProperty("RANGE",sProperty); kq}byv}3I Utility.log(sProperty); tpJA~!mG3 Q4u.v,sE {'IO InputStream input = httpConnection.getInputStream(); 11oNlgY& //logResponseHead(httpConnection); kOydh(yE r07u6OA DB|1Sqjsn byte[] b = new byte[1024]; ^^b'tP1> int nRead; 7a"06Et^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) PeJ#9hI~rQ { njs: nStartPos += fileAccessI.write(b,0,nRead); dxX`\{E //if(nThreadID == 1) ]hS:0QE // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m4/qxm"Dx: } ,6>3aD1w~q =z'(FP5!0 c""&He4zp Utility.log("Thread " + nThreadID + " is over!"); uPfz'|, bDownOver = true; ZO<,V //nPos = fileAccessI.write (b,0,nRead); jrQ0-D%M d } FOk&z!xYKd catch(Exception e){e.printStackTrace ();} Z}S[fN8 } ;E.]:Ia~ } "6jt$-? QY;(Ny/(y t{>K).' //打印回应的头信息 cfIC(d public void logResponseHead(HttpURLConnection con) =dGp&9K,fw { pCE
GZV,d@ for(int i=1;;i++) B7f<XBU6> { O)q4^AE$ String header=con.getHeaderFieldKey(i); z8X7Y
>+SA if(header!=null) .y
s_'F-]0 //responseHeaders.put(header,httpConnection.getHeaderField(header)); [.}qi[=n Utility.log(header+" : "+con.getHeaderField(header)); 1$0Kvvg[ else
vfkF@^D break; _KM?
?& } lUu0AZQmG } <e UsMo< ,8 4|qI ]yPK}u public void splitterStop() H,%bKl# { z 206fF bStop = true; `]5qIKopL } !,`'VQw$ c]M+|R5 8$}<4 `39 } rCw4a?YS 6\7c: Jinh#iar /* )J 'F]s **FileAccess.java LQ~|VRRX< *//文件访问(定位,写) bL7Gkbs&| package NetFox; jF?0,g import java.io.*; liS' Tksv7*5$ ":/c|! public class FileAccessI implements Serializable{ "pO x"z\d,O%W //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 O&7.Ry
m RandomAccessFile oSavedFile; gCghWg{S long nPos; .s<0}<Aq> *y4g\#o. 2 ,nhs,FZ public FileAccessI() throws IOException i*|HN"! { hrKeOwKHU this("",0); Qf_N,Bq{a } WHC/'kvF r-T1^u `<tRfl}qs public FileAccessI(String sName,long nPos) throws IOException fn<dr(Dx { yP]>eLTSd oSavedFile = new RandomAccessFile(sName,"rw"); /H<{p$Wd this.nPos = nPos; HAH\#WE oSavedFile.seek(nPos); *<^C0:i( } j&
7>ph ;!HQ!#B }Q`+hJ0 public synchronized int write(byte[] b,int nStart,int nLen) [x)T2sA { x_7$g<n int n = -1; gxO~44" try{ 0o8`Y oSavedFile.write(b,nStart,nLen); 7X(2SI3m n = nLen; ;l%xjMcU } _`SDG5 catch(IOException e) 3rRIrrYO { W<q<}RSn e.printStackTrace (); %i? } Py*WHHO ,It0brF "7sv@I_j return n; BQfnoF } ;jgf,fbM pBAAwHD `RY}g; } DQ0S]:tC ZW?h\0Hh -9LvAV> /* P 'h39XoZ **SiteInfoBean.java JcRxNH
)<" */ V~PGmn[V package NetFox; ]n4PM=hz ;C-ds }h1BAKg public class SiteInfoBean { {eU>E/SQ p@78Xmu?q UG.:D';3, private String sSiteURL; //Site's URL v^eAQoFLhN private String sFilePath; //Saved File's Path >C,0}lj private String sFileName; //Saved File's Name rZ,qHM private int nSplitter; //Count of Splited Downloading File MZ%J
]Nd i@:^b_ -$!r+4|q public SiteInfoBean()
2l,>x {//nSplitter的缺省值为5 N]yT/8 //default value of nSplitter is 5 e_!h>=$%8 this("","","",5); Jm ,:6T } FTUfJIVN( t!wbT79/ pOK=o$1V8 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;ZB=@@l( { Vw;iE=L sSiteURL= sURL; <
R"Y^]P= sFilePath = sPath; PoZ$3V$(Lz sFileName = sName; fKEDe>B5 this.nSplitter = nSpiltter; %(s| =X(N+(1~ 'sAkrl8kt } ty!DMg# 6\l F t_ CMsp public String getSSiteURL() #>_t[9; { .;31G0<w2 return sSiteURL; u"5/QB{ } J4]"@0 ?6 Hd4 ~v0eS iM!V4Wih6 public void setSSiteURL(String value) 7r,GdP . { V@+sNM sSiteURL = value; jA8Bmwt;w } H`<u2fo|p 1<h@^s ; &5jc
&CS public String getSFilePath() I!F&8B+| { s]yZ<uA return sFilePath; 4qDa:D"5 } &pl)E$Y <.g)?nj1 <Y /3U public void setSFilePath(String value) xe OfofC(l { @/aJi6d"^E sFilePath = value; bHq.3; } ,6y.wNb :F qKXg'1#E) 1grcCL
q public String getSFileName() Y".?j5f? {
Mb_"M7 return sFileName; q:F6MW } Bph(\=
W rG-x 3>b bPV}T` public void setSFileName(String value) e8SAjl"} { Q$Qr)mcC sFileName = value; :V"e+I } xz: xNY&*jI |1kA6/ public int getNSplitter() hRKJKQ@7 { -=
c&K& return nSplitter; S]E|a@kD3 } R(>
oyxA[F 5 3+C;]J ixy:S1pI public void setNSplitter(int nCount) o7tlkSZ { ,*Wh{) nSplitter = nCount; m k~F@ } 0I)eYksh } M G&vduu Cjt].XR@ R8.@5g_ /* mr>E'd.' **Utility.java r"L:Mu */ 1"A"AMZf package NetFox; T*k{^=6"! s Wj:m ) {o'(_.{ public class Utility { ]q#"8= m{*_%tjN0 O~J f"Ht public Utility() 9;gy38.3 { 5[6{o$I 4M$"0}O;[h ^~B#r# } WYvcN8F f#38QP-T //线程睡眠 <@>icDFEHn public static void sleep(int nSecond) gBgaVG { G #$r)S try{ tR=1.M96Y Thread.sleep(nSecond); =?M{B1;H } ?YFSK catch(Exception e) o|KmKC n> { Fyz1LOH[X e.printStackTrace (); FLumI-se! } 8N<2RT8W } .4z_ohe ^6UE/4x!y //日志 pmUC4=&e public static void log(String sMsg) ],<pZ1V; { F6{Q1DqI System.err.println(sMsg); 93)1 } z9Y}[pN :2t?0YR :y~l?0b&8 public static void log(int sMsg) nqYarHi { V[*<^% System.err.println(sMsg); ~c,+)69"T } ZB$,\|^6 } UWgPQ%} Y4Jaw2b sVS),9\} /* a{I(Qh!} **TestMethod.java (Kkqyrb */ #9(iu S+BU package NetFox; ;|vn;s/ GQ9H>Ssz )"bP]t^_ public class TestMethod { B%co`0$ r+k~%5Ff~ qaBL public TestMethod() DRu#vC { ///xx/weblogic60b2_win.exe Gd2t^tc try{ b9l%5a SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); !5zj+N //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); k+u L^teyS SiteFileFetch fileFetch = new SiteFileFetch(bean); x]"N:t fileFetch.start(); L# .vbf } Ap(>mUs!i catch(Exception e){e.printStackTrace ();} Qv;^nj{\qV 3r2e_?m F`f8q\Fc } rV/! VJ6x %\!3tN 4:s!mHcz public static void main(String[] args) .Nd_p{
{ $0~_)$i: new TestMethod(); ^,fMs: } u3vw[k } mm`yu$9gbP 点击下载更多相关资料
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