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/* J^mm"2 **SiteFileFetch.java )2bbG4:N */ >UV=k :Q package NetFox; ASr3P5/ import java.io.*; x'
3kHw import java.net.*; }G<A$*L1 :(4];Va i6k~j%0m public class SiteFileFetch extends Thread { (y2P." ::Pf\Lb> lH>6;sE SiteInfoBean siteInfoBean = null; //文件信息Bean 1tH#QZIT long[] nStartPos; //开始位置 z|zd=3c long[] nEndPos; //结束位置 p49T3V FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;{"uG>#R long nFileLength; //文件长度 U5j0i] boolean bFirst = true; //是否第一次取文件 N0(($8G boolean bStop = false; //停止标志 XK
yW File tmpFile; //文件下载的临时信息 (FOJHjtkM DataOutputStream output; //输出到文件的输出流 :;o?d&C tsf!Q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a&gf0g;@I public SiteFileFetch(SiteInfoBean bean) throws IOException >soSOJ[ { X Qj+]-m siteInfoBean = bean; {G _|gs //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); vtTXs]> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); D 6F/9| if(tmpFile.exists ()) ,>I_2mc { a0cW=0l= bFirst = false; iBqIV read_nPos(); L%f$ & } `e+eL*rZ~ else 9`DY6qfly { [Ny'vAHOj nStartPos = new long[bean.getNSplitter()]; Z
DnAzAR nEndPos = new long[bean.getNSplitter()]; 5K|s]Y; } `,6^eLU )h;zH,DA[3 +9_E+H'?! fq0[7Yb } &3Mps[u:h 3$kElq[ Wr.~Ns< public void run() ,+RoJwi m { 5$
rV0X,O //获得文件长度 E=~Ahkg //分割文件 ZmJHLn[B //实例FileSplitterFetch SrXuiiK //启动FileSplitterFetch线程 q^b_'We_9 //等待子线程返回 z0 _/JwJn try{ zKaEh
if(bFirst) Redxg. P { ^s?i&K,! nFileLength = getFileSize(); {>.qo<k if(nFileLength == -1)
XOJ@-^BX { L&~>(/*7U System.err.println("File Length is not known!"); r7N%onx } #>qA&*+{n else if(nFileLength == -2) DT#Z6A { Mer\W6e"e System.err.println("File is not access!"); pPZ^T5-ks } 0 mR else 8\8%FSrc { w7h=vy n? for(int i=0;i<nStartPos.length;i++) AmT*{Fz8 { I,!>ZG@6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); c#(&\g2H } rDU"l{cg for(int i=0;i<nEndPos.length-1;i++) }ilX
2s?> { :a9$f8*b nEndPos = nStartPos[i+1]; " qrL:, } %b`B.A nEndPos[nEndPos.length-1] = nFileLength; , MU9p* } aV?r %'~Z } zGE{Z A ?C9>bKo*2H }#U3vMx( //启动子线程 dLTA21b# fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; lpeo^Y}N for(int i=0;i<nStartPos.length;i++) >.#tNFAs { 'P~6_BW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (ZuV5|N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `G.:G/b%H nStartPos,nEndPos,i); <2RxyoDL6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AkRZUj\ fileSplitterFetch.start(); _k.gVm } 6 0Obek` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _fANl}Mf: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); eE;")t, // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 'k[gxk|d2 nEndPos = " + nFileLength); G6x 2!Ny // fileSplitterFetch[nPos.length-1].start(); sOW,hpNW >@U
lhJtW 4WV)&50 //等待子线程结束 S~ 3| //int count = 0; )Z2t=&Nw //是否结束while循环 <0I=XsE1iX boolean breakWhile = false; o M#S.f? ^7~w yAr .:#6dG\0z while(!bStop) YJ^TO\4WM { @Ao E> write_nPos(); jj 9eFB Utility.sleep(500); "t"&6\ breakWhile = true; >zAI#N4 k|T0Bly3P QabYkL5@ for(int i=0;i<nStartPos.length;i++) abM4G { Y_<(~eN` if(!fileSplitterFetch.bDownOver) )z?Kq0 { T3
k#6N. breakWhile = false; mF !=H% break; >qI|g={M } I3V>VLv } %S<( z5 if(breakWhile) DY%#E9 break; c F(]`49( }ZWeb#\ o(@F37r{? //count++; l?%U*~* //if(count>4) !Rw\k'<GKX // siteStop(); (&u)FB* } m=<;) XL7jUi_4:L &c!=< <5M System.err.println("文件下载结束!"); s~6irf/ } L"6@3 catch(Exception e){e.printStackTrace ();} kY6))9 O } -m~[z e?D,=A4mV" D0&{iZ( //获得文件长度 z[wk-a+w public long getFileSize() Kv:ih=? { Zb7:qe<UN int nFileLength = -1; aJ Du_ try{ RFu]vFff URL url = new URL(siteInfoBean.getSSiteURL()); c!%:f^7g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'HV}Tr httpConnection.setRequestProperty("User-Agent","NetFox"); PF(P"f.?D ,uP1U@Cas AcF;5h int responseCode=httpConnection.getResponseCode(); 1dK^[;v>3 if(responseCode>=400) /vB%gqJvX { gU}?Yy processErrorCode(responseCode); 7M1*SC return -2; //-2 represent access is error T<0Bq"'% } :q4Mnr "zO+!h'o i4"xvLK4 String sHeader; FBPT@`~v a|\_'# ]eq3cwR[| for(int i=1;;i++) \0pJ+@\T9 { WiL~b
=fT //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5aTyM_x //Utility.log(in.readLine()); O ,[aL;v sHeader=httpConnection.getHeaderFieldKey(i); X3Vpxtb if(sHeader!=null) n.y72-&v { y o[!q|z if(sHeader.equals("Content-Length")) |[TH
~o { sh?Dxodp9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); V@K}'f~ break; x9HA^Rj4- } &w3LMOT } T+2I:W% else ~4*9w3t
break; q6{ %vd } p$@=N6)I.k } GKPqBi[rO catch(IOException e){e.printStackTrace ();} /kVy#sT| catch(Exception e){e.printStackTrace ();} 9bXU!l[ }~-)31e'` \'"q6y Utility.log(nFileLength); '
n~N*DH h3xX26l 4#=!VK8ZH return nFileLength; Xb3vvHdI } M42D5|tZc ~eL7=G@{ ^LT9t2 //保存下载信息(文件指针位置) +.HQ+`8z] private void write_nPos() m=fmf( { W9V%Xc`LQ try{ AJ:@c7:eS output = new DataOutputStream(new FileOutputStream(tmpFile)); :"O=/p+*Us output.writeInt(nStartPos.length); #D+Fq^="P for(int i=0;i<nStartPos.length;i++) 6M$.gX
G. { Qq]UEI `Go // output.writeLong(nPos); j&m<=-q output.writeLong(fileSplitterFetch.nStartPos); &TWO/F+Y output.writeLong(fileSplitterFetch.nEndPos); 5
|C;]pq } n]coqJ output.close(); 8yFD2(# } Zml9ndzT catch(IOException e){e.printStackTrace ();} Ed*`d> catch(Exception e){e.printStackTrace ();} kC9A } `Xmpm4 ] O t`}eL- T:.J9 //读取保存的下载信息(文件指针位置) n3b@6V1_ private void read_nPos() i$:CGUb { x_Ais&Gc try{ Punbw\9!d, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); PD/JXExK int nCount = input.readInt(); fBd +gT\S nStartPos = new long[nCount]; Gh|1%g"gm nEndPos = new long[nCount]; +S%@/q for(int i=0;i<nStartPos.length;i++) <)n
{ #^#)OQq] nStartPos = input.readLong(); |Be.r{l nEndPos = input.readLong(); s9`T% pg } NK#Dq&W+& input.close(); [EGE| } $X*$,CCIB catch(IOException e){e.printStackTrace ();} u{p\8v%7 catch(Exception e){e.printStackTrace ();} Bdbw!zRR$ } JBUJc N{p2@_fnB <O\z`aA'q private void processErrorCode(int nErrorCode) FT(EH { [V jd)% System.err.println("Error Code : " + nErrorCode); vlj|[joXw } 4?yc/F=kI ;- ]f4O8 ^2^ptQj //停止文件下载 tfv]AC7x public void siteStop() B4|%E$1+ { &
bw1 bStop = true; s:]rL&| for(int i=0;i<nStartPos.length;i++) H#Og0gEE}5 fileSplitterFetch.splitterStop(); V">Uh@[J_ `XWxC:j3% bh7 1Zu } & vLX } 3?5
~KxOE( //负责部分文件的抓取 ;:$Na= **FileSplitterFetch.java o!\O) */ ]B,S <*h package NetFox; b0t];Gc%b H8-,gV 9I.v?Tap import java.io.*; .cZ&~ N import java.net.*; ;_Rx|~!! 1@nR.v"$ x6) public class FileSplitterFetch extends Thread { RXWjFv~/ e&0B4wVAQ `chf8 String sURL; //File URL y6PAXvv'{ long nStartPos; //File Snippet Start Position o$-8V:)6d long nEndPos; //File Snippet End Position v\MH;DW^Z int nThreadID; //Thread's ID >$Fc=~;Ba boolean bDownOver = false; //Downing is over mML^kgy\N boolean bStop = false; //Stop identical U<6k!Y9ny FileAccessI fileAccessI = null; //File Access interface dl":?D4H 'g=yJ ,-b{oS~u public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vy"Lsr3 { ;!~;05^iD this.sURL = sURL; dIpt&nH&$ this.nStartPos = nStart; 'Vrev8D this.nEndPos = nEnd; rf`Br\g8 nThreadID = id; nL:vRJr-$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 4
^+hw; } ASYUKh,h vSnb>z1 93!a public void run() X
]a> { .y\HQ^j while(nStartPos < nEndPos && !bStop) _E30t( _. { k]>k1Mi= ;Q"F@v}18 (%P* rl try{ `r iv`+J{s URL url = new URL(sURL); H_AV 3
; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VG8rd'Z httpConnection.setRequestProperty("User-Agent","NetFox"); O\D({> String sProperty = "bytes="+nStartPos+"-"; no/]Me!j= httpConnection.setRequestProperty("RANGE",sProperty); \iL,l87 Utility.log(sProperty); tm|lqa 5~44R@` v =?V{"wk! InputStream input = httpConnection.getInputStream(); FI/YJ@21 //logResponseHead(httpConnection); zhCI+u4/qz )-QNWN
H @B'Mu:|f byte[] b = new byte[1024]; W8P**ze4) int nRead; R Nv<kw while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) HJ'93, { bNaUzM!,H nStartPos += fileAccessI.write(b,0,nRead); R_N<j //if(nThreadID == 1) ?}]kIK}MC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7O9s5 } f C^l9CRY pS<b|wu?f $3[cBX.= Utility.log("Thread " + nThreadID + " is over!"); NF1D8uI bDownOver = true; GVfu_z? //nPos = fileAccessI.write (b,0,nRead); - dOT/%Ux } L$Leo6<3a catch(Exception e){e.printStackTrace ();} ]8_h9ziz } H3c=B /+ } w7Pe<vT x@Y2jM ,|4Ye //打印回应的头信息 wU ; f public void logResponseHead(HttpURLConnection con) 1 IlR { O\LW
8\M for(int i=1;;i++) =k*0O_ { &S3W/lQs String header=con.getHeaderFieldKey(i); `HS4(2+C if(header!=null) "~(&5M\8` //responseHeaders.put(header,httpConnection.getHeaderField(header)); uv-W/ p Utility.log(header+" : "+con.getHeaderField(header)); <?zTnue else h/fCCfO, break; kr*c?^b } QB.'8B_ }
{''|iwLr vaf9b}FL YT5>pM-% public void splitterStop() BH-[q9pf { 0o<qEo^ bStop = true; \i,cL)HM } rq1kj 8%2 %)/f; T6 ).]m@g:ew } {\aSEE/' @|GeR jSFN/C.9h /* )T64(_TE **FileAccess.java da2[
*//文件访问(定位,写) ILi5WuOYX package NetFox; 0 `!Q-G7 import java.io.*; baNfS E~>6*_? VRX"
@uCD public class FileAccessI implements Serializable{ bS<@Rd{g Jrk^J6aa //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 }R1`ThTM RandomAccessFile oSavedFile; gr
5]5u
long nPos; Qsntf.fT P*PL6UQ f^)uK+:. public FileAccessI() throws IOException +2zuIW. { Ib2 @Wi this("",0); KCk?)Qv } S(J\<)b mei_aN7zW RGO:p]t| public FileAccessI(String sName,long nPos) throws IOException A&P1M6Of { U R@BSK' oSavedFile = new RandomAccessFile(sName,"rw"); r}\h\ { this.nPos = nPos;
Is@a,k oSavedFile.seek(nPos); +?iM$}8!U } <s-@!8*( Uxemlp%%* 5b#6 Y public synchronized int write(byte[] b,int nStart,int nLen) *|HZ&} { j/9QV int n = -1; KupMndK try{ CjQ"o Qw oSavedFile.write(b,nStart,nLen); 5FSv"= n = nLen; , Ln
} u-[t~-(a catch(IOException e) QWHy=(! { ,GX~s5S8 e.printStackTrace (); @E}X-r.^f } VK'T[5e b|dCEmFt O4/n!HOb return n; ,Us2UEWNv } >J}n@MZ c,q"}nE8w 0sd-s~; } +V9B ^
6.lb\ *kQCW#y0 /* ~B!O~nvdQ **SiteInfoBean.java z9 w&uZzi */ ~u0xXfv# package NetFox; A,gx5!J }{8Fo4/ HB7( public class SiteInfoBean { -k&{nD| YvruK:I V+qJrZ,i private String sSiteURL; //Site's URL g6g$nY@Jm private String sFilePath; //Saved File's Path hoR=%pC* private String sFileName; //Saved File's Name 3l%,D:
? private int nSplitter; //Count of Splited Downloading File M{xVkXc> @vQa\|j GzFE%< 9F public SiteInfoBean() ,<3uc {//nSplitter的缺省值为5 _IL2-c8 //default value of nSplitter is 5 u:k:C this("","","",5); Mjj}E
>& } `x}
Dk<HF 3}4p_}f/[4 zq;DIWPIoJ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &G/|lv>j { u<]mv sSiteURL= sURL; XocsSs sFilePath = sPath; f>r3$WKj sFileName = sName; rer|k<k;]G this.nSplitter = nSpiltter; voV:H[RD9 -+}5ma T;!ukGoFP } \E@s_fQ] >{m2E8U0 iS1Gb$? public String getSSiteURL() *q*HG W5 { nG"n-$A?< return sSiteURL; !&`}]qQZ } f<89$/w ^Cg^`n?@b e3eVvl5] public void setSSiteURL(String value) mF'-Is { =3|pHc hJ4 sSiteURL = value; &Vt2be* } &xiOTkqB ;cI#S%uvpn i-,D_ public String getSFilePath() d=XpO*v,[ { dC`tN5 return sFilePath; _1sMY hI } L)F1NuR 'j,oIqx +2DE/wE]e+ public void setSFilePath(String value) BWUt{,?KU { j1YH9T#|D sFilePath = value; a@#Q:O)4 } ]U,CKJF%/ x_==Ss )nwZ/&@ public String getSFileName() qL|
5-(P { B6bOEPQ return sFileName; H`m:X,6} } oYz!O]j;a tAqA^f*{ ~BZXt7DE public void setSFileName(String value) j z~[5m}J { ;8P_av}C sFileName = value; o]Wz6L } LJGJ|P pI7Ssvi^ X9fNGM1 public int getNSplitter() TDlZ!$g( { e?V,fzg return nSplitter; ~G>jw"r } TbLe6x vv+D*e&< *hVb5CS public void setNSplitter(int nCount) x;]x_fz { &%^K,Q" nSplitter = nCount; 6eQsoKK } \M5P+Wk' } Lt1U+o[ot =<{h^-j;a #{!O,`qD /* -(*nSD9 **Utility.java ]cIu|bRO */ P##Z[$IJ3 package NetFox; #?9Q{0e <uZPqi|| !@u&{"{` public class Utility { Sx8l<X ,"Tjpdf y%4 Gp public Utility() P5xI { q
IM Z>F@nTzb> .o}%~g <d } %[wTz$S" o{V#f_o //线程睡眠 bM"fk& public static void sleep(int nSecond) 2MuO*.9D { XaW4C-D& try{ bGN
5 4{f Thread.sleep(nSecond); OX+hZ<y } 6lsL^]7 catch(Exception e) *>k!hq;j { $A`xhh[ e.printStackTrace (); !.EcP=S } )1f+ld%R } o/cr{>"N pI>*u ]x //日志 R:A'&;S public static void log(String sMsg) I!0JG`& { JSgpb?( System.err.println(sMsg); =}v ;1m } h*s`^W3 @EHIp{0. SK+@HnKd public static void log(int sMsg) \~>e_; { ExCM<$, System.err.println(sMsg); WL l_'2h } gg[9u- } *69c-`o j0FW8!!-g R&#tSL /* 7^MX l **TestMethod.java d+6]u_J */ ;i\C]* package NetFox; F$Q04Qw RN[]Jt#6 <Ct_d
Cc public class TestMethod { (#o t^ !v9lk9SV )TU<:V public TestMethod() h*Je35
{ ///xx/weblogic60b2_win.exe tPU-1by$ try{ bLbR IY"l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6tn+m54_ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :)IV!_>'d SiteFileFetch fileFetch = new SiteFileFetch(bean); (a.1M8v+Sg fileFetch.start(); )eYDQA>J } ewnfeg1 catch(Exception e){e.printStackTrace ();} rbyY8
bX "MnSJ2 YT=eVg53 } & Kmy}q
yNa;\UF ffE#^| public static void main(String[] args) GK?4@<fY { .9h)bf+ new TestMethod(); /0lC KU!= } S~)w\(r } x<ax9{ 点击下载更多相关资料
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