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/* ~-#Jcw$+n= **SiteFileFetch.java %DM0Z8P$B- */ Z9eP(ip package NetFox; 1Cw
HGO import java.io.*; xqfIm%9i} import java.net.*; A2SDEVU L~C:1VG5 -_= m j public class SiteFileFetch extends Thread { :QC |N@C 8vQR'<, a\&g;n8jA SiteInfoBean siteInfoBean = null; //文件信息Bean w-3Lw< long[] nStartPos; //开始位置 &Tg~A9y\ long[] nEndPos; //结束位置 AWi+xo| FileSplitterFetch[] fileSplitterFetch; //子线程对象 Kl<NAv%j long nFileLength; //文件长度 )KOIf{ boolean bFirst = true; //是否第一次取文件 }i J$&CJ boolean bStop = false; //停止标志 tVh"C%Vkr File tmpFile; //文件下载的临时信息 ] !n3j=* DataOutputStream output; //输出到文件的输出流 AcHeZb8b vU$n*M1`$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) A9MTAm{ public SiteFileFetch(SiteInfoBean bean) throws IOException :*s@L2D6 { D 9UM8Hxi siteInfoBean = bean; k 7:Z\RGy //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); U+zntB tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V[n,fEPBr if(tmpFile.exists ()) J$lfI^^ { %M:$ML6b< bFirst = false; fk!9` p' read_nPos(); sG\K$GP! } ]E6r)C else x"r,l/gzy { =}YX I nStartPos = new long[bean.getNSplitter()]; !j}L-1*{ l nEndPos = new long[bean.getNSplitter()]; j4u
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CE mtdy@=?1Y } ?!O4ia3nFk @8$z2 u60RuP& public void run()
F@mxd { Wg2 0H23XW //获得文件长度 '.C#"nY>1 //分割文件 UuC-R) //实例FileSplitterFetch VfUHqdg- //启动FileSplitterFetch线程 $Ggnn# //等待子线程返回 3W{!\ try{ nLx|$=W if(bFirst) 6OoOkNWF { 6b9J3~d\E nFileLength = getFileSize(); a$Hq<~46 if(nFileLength == -1) ~+ 9vz { *eX/ZCn System.err.println("File Length is not known!"); M&)\PbMc } 7D1$cmtH else if(nFileLength == -2) IR#BSfBZ { c=zSq%e
System.err.println("File is not access!"); !qU1RdZ } N9*:]a else U`5/tNx { \>G}DGz
for(int i=0;i<nStartPos.length;i++) m)3M) 8t { /0$fYrg>J nStartPos = (long)(i*(nFileLength/nStartPos.length)); (=%0$(S> } <fF|AbC: for(int i=0;i<nEndPos.length-1;i++) n oM=8C&U { 1vxQ`) a nEndPos = nStartPos[i+1]; Gp+\}<^Z } '.M4yif\g nEndPos[nEndPos.length-1] = nFileLength; `oH4"9&]k3 } (w:,iw# } P$Oj3HD LM -e_op'` Js vdC]+ //启动子线程 `(
w"{8laB fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _ Yc"{d3S for(int i=0;i<nStartPos.length;i++) j9l32<h7] { *ra>Kl0
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vbd)L$$20+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /'5d0' ,M nStartPos,nEndPos,i); ch25A<O<R. Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P|Gwt& fileSplitterFetch.start(); &GkD5b } 4 Yv:\c // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), LAH">E siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); SOn)'!g // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ie|5,qw
E nEndPos = " + nFileLength); d4*SfzB // fileSplitterFetch[nPos.length-1].start(); ' QMcQvU kkWv#,qwU x^1d9Z //等待子线程结束 &1R#!|h1W //int count = 0; &pjj //是否结束while循环 H7z)OaM boolean breakWhile = false; C*3St`2@9 J7^UQ $;'M8L while(!bStop) =J)<Nx.gA { wDGb h= write_nPos(); GZ,MC?W Utility.sleep(500); =QGmJ3 breakWhile = true; x^EW'-a 7 4MxU Mgi~j.[ for(int i=0;i<nStartPos.length;i++) ;+(VO { q6w)zTpJGJ if(!fileSplitterFetch.bDownOver) ~J&-~<%P} { E #B$.K breakWhile = false; J-<_e?? break; /I!62?)-* } 6/5,n0 } ,[zSz8R if(breakWhile) ;Q^>F6+_m break; BxjSo^n (RV#piM >}%#s`3W1_ //count++; AvB=/p@] //if(count>4) IZ7o6Etti // siteStop(); ES AX}uF } 2xf lRks ..X _nF -Dx3*Zh P System.err.println("文件下载结束!"); Yj/o17 } ",D!8>=s catch(Exception e){e.printStackTrace ();} DXI4DM"15I } 8FMxn{k2 @uCi0P t jH!;}q //获得文件长度 KFwuz()7 public long getFileSize() 6p*X8j3pW { rDhQ3iCqo int nFileLength = -1; c:u*-lYmK% try{ eZqEFMBTm URL url = new URL(siteInfoBean.getSSiteURL()); ZY]$MZf5yo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^4+NPk
httpConnection.setRequestProperty("User-Agent","NetFox"); E+qLj|IU lZL+j6Q 1W{ oj int responseCode=httpConnection.getResponseCode(); J8p; 1-C" if(responseCode>=400) 5WJ ~%"O { ndzADVP processErrorCode(responseCode); a1y<Y`SC9 return -2; //-2 represent access is error
Um{) ?1 } 3qf#NJN} I9qFXvqL -^2p@^ String sHeader; 3*~`z9-z SsTBjIX 6qFzo1LO for(int i=1;;i++) uX3yq<lK" { ?'+]d;UO& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); cZ|*Zpk //Utility.log(in.readLine()); RQ=$,
i` sHeader=httpConnection.getHeaderFieldKey(i); zKGZg>q if(sHeader!=null) yuBRYy#E|% { F:T(-, if(sHeader.equals("Content-Length")) } &+]UGv { V 97ORI nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Mf#@8"l break; [*p;+&+/ZM } 2A;i } %%}l[W else AXHY$f| break; rHB>jN@$ } #o/;du } .1RQ}Ro,< catch(IOException e){e.printStackTrace ();} hdx_Tduue catch(Exception e){e.printStackTrace ();} 9 da=q (WC
=om [mu8V+8@d4 Utility.log(nFileLength); tj~r>SRb+ pNOE
KiJ ~6n|GxR.[ return nFileLength; PiM(QR } 5?SE?VC=t 2|lR@L sr zPp22 //保存下载信息(文件指针位置) v4s4D1} private void write_nPos() bWp:!w#K { W,6q1 try{ iv_3R}IbX output = new DataOutputStream(new FileOutputStream(tmpFile)); "h_f-vP output.writeInt(nStartPos.length); f&4+-w.:V| for(int i=0;i<nStartPos.length;i++) y EfAa6 { s(3u\#P // output.writeLong(nPos); m_oUl(pk output.writeLong(fileSplitterFetch.nStartPos); _Sfu8k>): output.writeLong(fileSplitterFetch.nEndPos); ~6kF`}5 } n'^`;- output.close(); |.$B,cEd } F$tzsz,9n catch(IOException e){e.printStackTrace ();} yKl^-%Uq< catch(Exception e){e.printStackTrace ();} H!]&"V77 } -%MXt S8dfe~ |7: /B?wn=][ //读取保存的下载信息(文件指针位置) kE'p=dXx private void read_nPos() 8QJr!#u { jFdgFKc) try{ OP=brLGu0 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); en'[_43 int nCount = input.readInt(); HJN GO[*g nStartPos = new long[nCount]; 1?H;
c5?d& nEndPos = new long[nCount]; gU+yqT7= for(int i=0;i<nStartPos.length;i++) w/o^OjwQ { |Jd8ul:&e nStartPos = input.readLong(); Y+Z+Y)K nEndPos = input.readLong(); tqh)yr; } ,\"x#Cc f input.close(); V[kJ;YLPN } 1/?Wa catch(IOException e){e.printStackTrace ();} vc|tp_M67 catch(Exception e){e.printStackTrace ();} W vB]Rs } g]L8Jli }C_g;7* f\cTd/?Ju private void processErrorCode(int nErrorCode) 1$03:ve1 { J' P:SC1 System.err.println("Error Code : " + nErrorCode); k
6[ } eK1l~W% d^RcJ3w \A\ //停止文件下载 ,c`6- public void siteStop() {z_cczJ- { yJC:
bD1xi bStop = true; /c=8$y\%@ for(int i=0;i<nStartPos.length;i++) s3JzYDpy fileSplitterFetch.splitterStop(); !`=iKe&%E A'jL+dI. Q"
h]p } cI8\d 4/py } ;~:Z~8+{c //负责部分文件的抓取 +
>dC **FileSplitterFetch.java -{OJM|W+ */ ,0h{RZKw package NetFox; qbq2Bi'a jW8ad{ 8/R$}b>< import java.io.*; P{K\}+9F
import java.net.*; 5,MM`:{{ [rcM32 :!Q(v(M public class FileSplitterFetch extends Thread { JJ) VO:
Cj~e` VRhk String sURL; //File URL W895@ long nStartPos; //File Snippet Start Position e"^WXP.t& long nEndPos; //File Snippet End Position /'DAB** int nThreadID; //Thread's ID +sn0bi/rG boolean bDownOver = false; //Downing is over v2]N5 boolean bStop = false; //Stop identical ?SYmsaSr5 FileAccessI fileAccessI = null; //File Access interface ;U?=YSHk7 W#g!Usf:/ I_8 n>\u public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -!~pa^j { WP\kg\o this.sURL = sURL; ]#shuZ##>0 this.nStartPos = nStart; \kyoA
Z this.nEndPos = nEnd; 2<J2#}+\ nThreadID = id; $ bMmyDw fileAccessI = new FileAccessI(sName,nStartPos);//定位 P|ibUxSA~, } J3aom,$o }KUK|p5 /V+7:WDj public void run() k}g4? { GL0P&$h while(nStartPos < nEndPos && !bStop) aOinD { r\fkx> $ZyOBxI ]Gm4gd` try{ XLiwE$:t% URL url = new URL(sURL); ~5|R`% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l=P)$O|=w httpConnection.setRequestProperty("User-Agent","NetFox"); VSUWX1k4% String sProperty = "bytes="+nStartPos+"-"; gA EB httpConnection.setRequestProperty("RANGE",sProperty); w$&;s<0 Utility.log(sProperty); .u&X:jOE =[aiW|Y A?n5;mvq# InputStream input = httpConnection.getInputStream(); bydI+pVMo //logResponseHead(httpConnection); PyI"B96gz e9'0CH< DQu)?Rsk byte[] b = new byte[1024]; s^PsA9EAn int nRead; 9UteD@* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <6.`(isph { X^&--@l}T! nStartPos += fileAccessI.write(b,0,nRead); R>Ox(MG //if(nThreadID == 1) um/F:rp // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6:QlHuy0nH } t; #@t/` -8"K|ev N@X6Z!EO Utility.log("Thread " + nThreadID + " is over!"); *=O3kUoL bDownOver = true; UnVa`@P^:G //nPos = fileAccessI.write (b,0,nRead); ib> ~3s; } TT;ls<(Lg catch(Exception e){e.printStackTrace ();} 9k9}57m.i } p {.6 } fbdpDVmpU I4qS8~+# H^o_B1 //打印回应的头信息 @>ys,dy public void logResponseHead(HttpURLConnection con) k&[6Ld0~56 { W"\`UzOLQ for(int i=1;;i++) T%"wz3~ { 5sEk rT ' String header=con.getHeaderFieldKey(i); ep5`&g]3 if(header!=null) ^(T~ Q p //responseHeaders.put(header,httpConnection.getHeaderField(header)); [q0^Bn}h Utility.log(header+" : "+con.getHeaderField(header)); ,bM): else <h+UC# .x break; FD%OG6db]; } 'bH~KK5 } 7$0bgWi VL"Cxs
fO#nSB/
8 public void splitterStop() !w/fwOo { VS`{k^^ bStop = true; OqH3.@eK } 58mpW`Q Z"Q9^;0% D\J.6W } 8qfXc
^6 @Wm:Rz NTK9`#SA /* =%I;Y& K **FileAccess.java mss.\ *//文件访问(定位,写) S&l [z, package NetFox; %<O~eXY import java.io.*; O\=Zo9(NHF GKUjtPu P%R9\iajH public class FileAccessI implements Serializable{ ;ioF'ov
Zf??/+[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 fpO2bD%$8 RandomAccessFile oSavedFile; +_*iF5\ long nPos; M= 3w j-i>Jd7 6h&t%T public FileAccessI() throws IOException \v{HjqVkC { QAl4w)F this("",0); 6N Ogi } bQN3\mvY )L":I (6}7z+ public FileAccessI(String sName,long nPos) throws IOException F_/ra?WVH { 9@Cu5U] oSavedFile = new RandomAccessFile(sName,"rw"); eQ[}ALIq this.nPos = nPos; +4qR5(W oSavedFile.seek(nPos); >lJTS t5{ } eqOT@~H TB<$9FCHK {7$jwk public synchronized int write(byte[] b,int nStart,int nLen) |,H2ge { @a=jSB#B int n = -1; qrZ3`@C4k try{ d|W=_7z oSavedFile.write(b,nStart,nLen); ,E%O_:}R n = nLen; {C8IYBm } pP"j| catch(IOException e) ?y"M># { `q | )_ e.printStackTrace (); hc9ON&L\> } jWvi%Iqi xd"+ &YT u2fp~.'P return n; ?V~vP%1 } +RiI5.$=Z $i!r> .Jo S$40nM } 7dE.\#6r ![I|hB Dwr" - /* J5<16}* **SiteInfoBean.java KCp9P2kv. */ '9Q#%E!* package NetFox; +T,A^(&t b53s@7/mq :}#j-ZCC"
public class SiteInfoBean { xDS]k]/(T Z@*!0~NH=4 *<"{(sAvk private String sSiteURL; //Site's URL *p\fb7Pu_3 private String sFilePath; //Saved File's Path !4Sd ^" private String sFileName; //Saved File's Name zITxJx private int nSplitter; //Count of Splited Downloading File /Ah'KN|EN %z.d;[Hs DqmKDU public SiteInfoBean() /+ais3 {//nSplitter的缺省值为5 JFNjc:4{0 //default value of nSplitter is 5 !HhF*Rlr this("","","",5); s%~Nx3, } 0~[M[T\ 'V <ZmJ2 ~*^o[~x]\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) c@nh>G:y{& { %uiCC>cC sSiteURL= sURL; ,R7j9#D sFilePath = sPath; Fo~q35uB sFileName = sName; $S2
/* this.nSplitter = nSpiltter; tWaGCxaE @`^Z5n.4 *mYGs )| } -Edi"B4K F|oyrG [
`_sH\ public String getSSiteURL() w?M"`O( { &5B/>ag1! return sSiteURL; Are0Nj&? } \CS4aIp j+gh*\:q S+^hK1jL public void setSSiteURL(String value) C}L2'l, { O9ro{ k sSiteURL = value; z 9WeOs } h\~!!F CC$rt2\e &wu1Zz[qcz public String getSFilePath() nhZ/^`Y< { ;/IXw>O(/ return sFilePath; #8BI`.t)j } hew"p( ` Z^WI~B0nt VOg'_#I public void setSFilePath(String value) ^![7X'!;pt { zh(=kS` sFilePath = value; !#e+!h@ } I,]q;lEMt N\?__WlBK7 g~9b_PY9 public String getSFileName() ;DKJ#tS}" { -0NkAQrg return sFileName; [I<J6= } wCj)@3F hwi_=-SL pm[i#V<v public void setSFileName(String value) Uw3wR!: { /pLf?m9 sFileName = value; oBo |eRIt| } x7jFYC %ca` v;]. 6J$I8b#/ public int getNSplitter() ]Qp-$)N { Y%r>=Jvu6 return nSplitter; Bcb
'4*: } M}=>~TA@ Y\4B2:Qd9 P1$D[aF9$ public void setNSplitter(int nCount) Wk!<P"
nHd { |fgh
ryI, nSplitter = nCount; WU,b<PU & } =&FaMR2 } OcC|7s", g{2~G6%;0 (W[]}k; /* zzd PR}VG **Utility.java 6C
?,V3Z */ z('t#J!b package NetFox; E!L_"GW ]4K4Nh~ 1vJj?Uqc public class Utility { Z=a~0&G ?<Mx* l _C|j"f/} public Utility() Kt/:caD { 4<f^/!9w b+$wx~PLi 4.~ <|T8 } la^K|!| # 00?]6`z //线程睡眠 Pw6%,?lQ public static void sleep(int nSecond) j}fSz)`i { Ie s` !W^ try{ OO,EUOh-T: Thread.sleep(nSecond); 15Jc PDV } J'k^(ZZ catch(Exception e) \i<7Lk { \+x#aN\ e.printStackTrace (); = U[$i"+ } 2NB$(4/ } ]a[2QQ+g ]M~7L[ //日志 ]x%sX|Rj public static void log(String sMsg) )a%E $` { / neY2D6 System.err.println(sMsg); kX)*:~* } `v'yGsIV W[>qiYf^b 7=&+0@R#/d public static void log(int sMsg) B^{~,' { dh%DALZ8t System.err.println(sMsg); _G2)=yj] } +HgyM0LFg } 2~vvE NW&2ca .*z$vl /* t oM+Bd:Y **TestMethod.java EZT 8^m */ BaMF5f+ package NetFox; - Nt8'- +G,_|C2J aEun *V^, public class TestMethod { F'JT7#eX #5iwDAw:|r bkrl>Im<n public TestMethod() B$7Cjv { ///xx/weblogic60b2_win.exe 5'<a,,RKu try{ pOj8-rr SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); y'z9Ya //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); kL<HG Qt SiteFileFetch fileFetch = new SiteFileFetch(bean); ?30pNF| fileFetch.start(); c6iFha;db } -"XHN=H catch(Exception e){e.printStackTrace ();} #/\Zo &V8 lsgZ -KZ9TV # R } (nYGN$qC9 s{42_O?,c $+,kibk*R public static void main(String[] args) )r(e\_n { 6t'.4SR new TestMethod(); 3~LNz8Z* } |`+ (O } ^Of\l:q* 点击下载更多相关资料
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