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/* P;mmK&& **SiteFileFetch.java d+ql@e ] */ CYes'lr package NetFox; yngSD`b_P import java.io.*; Q0Dw2>~_K import java.net.*; :
R.,<DQM /8Ca8Ju f\2'/g}6a public class SiteFileFetch extends Thread { '~<D[](/F *"q ~z "a>%tsl$K SiteInfoBean siteInfoBean = null; //文件信息Bean QR\qGhQ~ long[] nStartPos; //开始位置 =Q[5U9 long[] nEndPos; //结束位置 O`rAqO0F FileSplitterFetch[] fileSplitterFetch; //子线程对象 ){icI< long nFileLength; //文件长度 i[T!{< boolean bFirst = true; //是否第一次取文件 q71Tg boolean bStop = false; //停止标志 ;,'eO i File tmpFile; //文件下载的临时信息 $l 0^2o= DataOutputStream output; //输出到文件的输出流 haqL
DVrf cuW$%$F //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $*`fn{2 public SiteFileFetch(SiteInfoBean bean) throws IOException `?2S4lN/ { W29@`93 siteInfoBean = bean; ;_1D-Mf //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :&9#p%/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); N=)N
if(tmpFile.exists ()) maXQG&.F { KR?-< bFirst = false; (VU: &. read_nPos(); ;~tKNytD`B } dHg[0Br)r else f* p=]]y { <Mxy&9}ic nStartPos = new long[bean.getNSplitter()]; `:R8~>p nEndPos = new long[bean.getNSplitter()]; gX.4I; } }Q/xBC) JY4 +MApN QE m6#y Z_ak4C } ?.,..p
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N P8:k"i/6J public void run() q: ?6 { 3{]csZvW //获得文件长度 cRI&cN"o //分割文件 !n@Yg2 w //实例FileSplitterFetch .ie \3q) //启动FileSplitterFetch线程 ikw_t? //等待子线程返回 bX=A77 try{ Rm&i" if(bFirst) G\=7d%T+ { ROW8YTYb nFileLength = getFileSize(); M(jSv if(nFileLength == -1) [qI, $ + { bmGIxBRq System.err.println("File Length is not known!"); CM!bD\5 }
~%bz2Pd% else if(nFileLength == -2) gY=nU,; { Fnzv& System.err.println("File is not access!"); L:}hZf{p* } (w6 024~ else 6Y`eYp5A { 6L}$R`s5H for(int i=0;i<nStartPos.length;i++) \L<Hy)l { Pz:,q~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); LW{7|g } 9V9K3xWn for(int i=0;i<nEndPos.length-1;i++) _RST[B.u6 { zL+jlUkE
nEndPos = nStartPos[i+1]; Gh>Rt=Qu% } ~Yb5FYE nEndPos[nEndPos.length-1] = nFileLength; |zKFF?7#wE } `DUMTFcMX } ,KdDowc ;vy" i f)Z$,& //启动子线程 9h9 jS~h fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; bd5\Rt for(int i=0;i<nStartPos.length;i++) pi7W8y
{ :uSo2d fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Uz} #. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), AU OL?st nStartPos,nEndPos,i); AD_")_B|i Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zN:VT& fileSplitterFetch.start(); Tu o`>ZA } -B* = V // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8Mf6*G#Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8LB,8*L^ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", J NPEyC nEndPos = " + nFileLength); onI%Jl sq // fileSplitterFetch[nPos.length-1].start(); iV58 m ; $i{>mDT zogw1g&C //等待子线程结束 hs!a'E //int count = 0; &5h{XSv //是否结束while循环 o:W>7~$jr= boolean breakWhile = false; Ej~vp2 jAie[5 M ~zA while(!bStop) !ow:P8K? { :k*'MU} write_nPos(); {E@Fk, Utility.sleep(500); LP-~; breakWhile = true; HIsIW%B .!e):&(8 2!Yq9,` for(int i=0;i<nStartPos.length;i++) a\pOgIp { 'y[74?1 if(!fileSplitterFetch.bDownOver) ($pN OGH { ;|}N\[fk%] breakWhile = false; K!Te*?b break; 2Tec#eYe } SR!EQ< } _2xNio& if(breakWhile) -K eoq break; z6)b XL[f *:gx1wd t~]n"zgovz //count++; rofj&{w //if(count>4) `u$
Rd // siteStop(); H=RzY-\a% } X'Q?Mh ]Wr2I M Z}#'.y\ f System.err.println("文件下载结束!"); zisf8x7^W } .ZQD`SRrI catch(Exception e){e.printStackTrace ();} "{(|}Cds } Q6)Wh6Cm N-Fs-uB h;cl+c|B //获得文件长度 DB%}@IW" public long getFileSize() -@L7!,j { <+Eu.K& int nFileLength = -1; C@d*t? try{ DcYL8u URL url = new URL(siteInfoBean.getSSiteURL()); -:cBVu-m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `yF6-F httpConnection.setRequestProperty("User-Agent","NetFox"); .j^tFvN~L iZY4+
X i<@"+~n~GK int responseCode=httpConnection.getResponseCode(); X
.,Lmh if(responseCode>=400) W>TG!R 5 { 0,~||H{ processErrorCode(responseCode); kb3>q($ return -2; //-2 represent access is error +q n[F70} } Cm@rXA/ }?G([s56 nVB.sab String sHeader; :j^IXZW 2qd5iOhX+ [x{z}rYH for(int i=1;;i++) ]bxBo { ncTPFv
H5 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); wN
NXUW //Utility.log(in.readLine()); @=_4i&]$ sHeader=httpConnection.getHeaderFieldKey(i); I;1W6uD= if(sHeader!=null) |BGB60}]f { O|K-UTWH% if(sHeader.equals("Content-Length")) MrjgV+P}[ { 5"sd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +pUG6.j% break; W4Z8U0co } mR,w~wP } dCA| ) else 9K!kU6Gh break; .`p,pt; } _E %!5u } ;k?Z,M: catch(IOException e){e.printStackTrace ();} CWBlDz catch(Exception e){e.printStackTrace ();} LV2#w_^I |7%has3" [}$jO,H5r Utility.log(nFileLength); #`]`gNB0Yg ej91)3AO j]HzI{7y return nFileLength; :2t0//@X } ='A VI-go5 <+y%k~(" "m#17J_ //保存下载信息(文件指针位置) K_!R private void write_nPos() eI,'7u4q { i?wEd!=w try{ T.(C`/VM output = new DataOutputStream(new FileOutputStream(tmpFile)); A_eO output.writeInt(nStartPos.length); /a,"b8 for(int i=0;i<nStartPos.length;i++) 2#
72B { Bnp\G h // output.writeLong(nPos); UuS6y9@v output.writeLong(fileSplitterFetch.nStartPos); dNu?O>= output.writeLong(fileSplitterFetch.nEndPos); joz0D!-"# } ^F)t>K$0m output.close(); Mz7qC3Z } knn9s0'Q catch(IOException e){e.printStackTrace ();} nsL"'iQ catch(Exception e){e.printStackTrace ();} v6U Gr4 } *{:Zdg'~E 5GK> ~2c( 'XJqh|G //读取保存的下载信息(文件指针位置) LZtO Q__B) private void read_nPos() &|-jU+r}B { ?B+]Ex(\B, try{ ^HhV?Iqg DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); n\ 'PNB int nCount = input.readInt(); bL`>#M_^ nStartPos = new long[nCount]; ;n q"jm nEndPos = new long[nCount]; bvW3[ V for(int i=0;i<nStartPos.length;i++) ,(i`gH{D { q2b>Z6!5 nStartPos = input.readLong(); 8vkCmV nEndPos = input.readLong(); >,x&L[3 } 'yo-`nNFD input.close(); $^e(?Pq } 4A`U [r_>D catch(IOException e){e.printStackTrace ();} P5KpFL`B catch(Exception e){e.printStackTrace ();} 3xk-D &" } Spu>
ac s6F0&L;N& M3U?\g private void processErrorCode(int nErrorCode) `]`S"W7& { U?%T~! System.err.println("Error Code : " + nErrorCode); z"nMR_TTu } HV&i! M@T U5
ia| V cG"wj$'w //停止文件下载 *(s0X[- public void siteStop() 00B,1Q HP { 82)%`$yZw[ bStop = true; e'yw8U5E/ for(int i=0;i<nStartPos.length;i++) g@'2 :'\ fileSplitterFetch.splitterStop(); DH7]TRCMZ) tmd{Gx}c +~>cAWZq_ } G#Kw6 } `>4"i+NFF8 //负责部分文件的抓取 \kZ@2.pN **FileSplitterFetch.java $."DOZQ3U */ ekW#| package NetFox; n8E3w:A- +B[XTn,Cru Q#F9&{'l import java.io.*; ce3``W/H3 import java.net.*; ]eUD3WUe>q 4T6: C?V 0GW69 z public class FileSplitterFetch extends Thread { 5yyc0UG F}.R-j# ;}lsD1S: String sURL; //File URL J%]5C}v \ long nStartPos; //File Snippet Start Position 1#3eY?Nb long nEndPos; //File Snippet End Position ^-LnO%h? int nThreadID; //Thread's ID n&!q9CR` boolean bDownOver = false; //Downing is over ~Ede5Vg!!2 boolean bStop = false; //Stop identical #@' B\!<@= FileAccessI fileAccessI = null; //File Access interface JXjH}C ^RE[5h6^q L&KL]n public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException d/3bE*gr
{ 4B9D this.sURL = sURL; n%;4Fm? this.nStartPos = nStart; s{OV-H this.nEndPos = nEnd; `z`=!1 nThreadID = id; `,O"^zR)z fileAccessI = new FileAccessI(sName,nStartPos);//定位 VnqcpJ } ?E,-P!&R Scug
wSB Q,M,^_ public void run() r0wAh/J| { d;,Jf*x\ while(nStartPos < nEndPos && !bStop) B8unF=u { 0dIGX |e .F'Cb)Z Aj]/A try{ Lf:#koaC URL url = new URL(sURL); guVuO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yf[1?{iVo httpConnection.setRequestProperty("User-Agent","NetFox"); beBv|kI4 String sProperty = "bytes="+nStartPos+"-"; ^ ;K"Y'f$ httpConnection.setRequestProperty("RANGE",sProperty); V$wbm z Utility.log(sProperty); g:.LCF ^I9U<iNIL ^F
qs,^~W InputStream input = httpConnection.getInputStream(); \PD%=~ //logResponseHead(httpConnection);
.:XX c ~1XC5.*-
nI4oQE byte[] b = new byte[1024]; z0x^HDAeC int nRead; ^?_MIS`4N while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h@]{j_$u { CfO{KiM(2 nStartPos += fileAccessI.write(b,0,nRead); P'[ISGt //if(nThreadID == 1) -aLM*nIoe // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); fu{v(^ } vM-kk:n7f y<*\D_J A8QUfg@uK~ Utility.log("Thread " + nThreadID + " is over!"); k.})3~F- bDownOver = true; nltOX@P- //nPos = fileAccessI.write (b,0,nRead); U\W$^r, } 1cx%+- catch(Exception e){e.printStackTrace ();} TD-B\ @_ } P)LQ=b}V#; } wz@[rMf ,gW$m~\ '"XVe+.O //打印回应的头信息 P9R-41! public void logResponseHead(HttpURLConnection con) |z8_]o+|r1 { W4qnXD1n for(int i=1;;i++) ^$mCF%e8H { 4`'Rm/) String header=con.getHeaderFieldKey(i); dKP| TRd if(header!=null) 4uH}
SG[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); RameaFX8 Utility.log(header+" : "+con.getHeaderField(header)); z8r?C else @My
RcC break; &xvNR=K[` } E:O/=cT } e\O625 ADM!4L(s4} P8H2v_)X& public void splitterStop() SmRFxqtN { unRFcjEa bStop = true; J7`;l6+Gb } 4uh~@ Lv <IBUl}|\ *y(UI/c } dQFUQ Pf;RJeD `Ba?4_>k /* )iVuac]E++ **FileAccess.java TwF.UL@G% *//文件访问(定位,写) [,;O$j} package NetFox; ONZ(0H{ 1$ import java.io.*; ~]Av$S
_,v>P2) AFeFH.G6Jr public class FileAccessI implements Serializable{ (w+SmD 7<L!" 2VB //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !s !el;G RandomAccessFile oSavedFile; KNN$+[_;H4 long nPos; hD7vjg&Z !HtW~8|: J9f]=1` public FileAccessI() throws IOException [g}0.J`_ { :T>OJ"p this("",0); a<]vHC7 } Ji1# >;& wzmQRn;s >I0 a$w public FileAccessI(String sName,long nPos) throws IOException Jh36NE8r { 0W_u"UY$c oSavedFile = new RandomAccessFile(sName,"rw"); 4H@7t,> this.nPos = nPos; b7">IzAe
oSavedFile.seek(nPos); +VJyGbOcC } W<TfDEEa fN21[Jv3 ]GsI|se public synchronized int write(byte[] b,int nStart,int nLen) ay`R jT { bYX.4(R int n = -1; <u1`o`|- try{ % .ss oSavedFile.write(b,nStart,nLen); '|*e4n n = nLen; C[l5[DpH } J l{My^I5 catch(IOException e) e2>AL { >5TXLOYZ e.printStackTrace (); )4hA Fy6l } \/nSRAk -G'3&L4
D ]r%fAmj return n; 3qDbfO[ } Ls3r( Tf &m]jYvRc Q4Qf/q;U } k'sPA_| _EP~PW#J T.B7QAI. H /* O%aHQL%Sz **SiteInfoBean.java h2= wC. */ [@3.dd package NetFox; b`Jsu!?{ W59 xe&l *o!#5c public class SiteInfoBean { p;D
{?H/ " ub0}p4V (\wV)c9 private String sSiteURL; //Site's URL SLH;iqPT private String sFilePath; //Saved File's Path x2/ciC
private String sFileName; //Saved File's Name ,w=u? private int nSplitter; //Count of Splited Downloading File y@AUSh; 0HQTe>! nU6UjC|3 public SiteInfoBean() Jp_ :.4 {//nSplitter的缺省值为5 O*n@!ye //default value of nSplitter is 5 2E!Q5 l!j this("","","",5); hvA|d=R( } ~jz51[{v aN6HO dl`{:ZR S public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) )YZx]6\l) { w6-<HPW<S sSiteURL= sURL; ~at:\h4: sFilePath = sPath; 6?JvvS5 sFileName = sName; (B?ZUXM, this.nSplitter = nSpiltter; t8.3 -[h|*G.J 0< }BSv } d7 :=axo, g;7u-nP "x0KiIoPk public String getSSiteURL() zH#urF6< { glBS|b$\: return sSiteURL; P{: 5i%qC } 8,e%=7h_e gr# |ZK.` ,# %I$ public void setSSiteURL(String value) VtGZB3 { %u2",eHCB sSiteURL = value; CT'#~~QB } ft4hzmuzM ::-*~CH)
*D1vla8 public String getSFilePath() M 5`hMfg { +%K~HYN return sFilePath; IlB*JJnl } )HX(-"c 2h)Qz+|7 Q5sJ|]Bc public void setSFilePath(String value) <\P
`< { 'T;;-M3* sFilePath = value; zw iS%-F } p\.IP2+c ?0qP6'nWx }d5~w[ public String getSFileName() k~fH:X~x { 7 y$a=+D i return sFileName; oa`7ClzD } ,R-aO= % #wZH.i# Qd>\{$N public void setSFileName(String value) ,lFp4 C { KleiX7 sFileName = value;
;kT~&.,y } Iv*u#]{t 0s RcA -9 su3Wk,MLP public int getNSplitter() k+Z2)j" { Jb-.x_Bf return nSplitter; "b%FkD } Z9Z\2t nlaW$b{= q>5j (,6F public void setNSplitter(int nCount) M+:9U&>
{ {-%8RSK=< nSplitter = nCount; iq,rS" } $dA]GWW5A } ]b:>7_la :\y' ?d- Q FW|_8q?}< /* Z[eWey_ **Utility.java 2(m#WK7>F */ |"+Ufw^ package NetFox; `3@?)xa l,zhBnD i4nFjz public class Utility { VKf&}u/ o$rF-?
Lw%_xRn) public Utility() $48Z>ij?f { q'TIN{\.{ / :6|)AW.{ e[0"x.gu } p@[ fZj ;47z.i&T //线程睡眠 !&NrbiuN public static void sleep(int nSecond) O;|Cu7WU { &b7_%,Bx4 try{ c*(^:#"9 Thread.sleep(nSecond); <HzL%DX } '2ZvK catch(Exception e) JodD6;P { ;_2+Y^Qb e.printStackTrace (); z?( b|v } ;{q* } -V;BkE76 0U H] //日志 ODhq
`?(N public static void log(String sMsg) yMTO 5~U{ { kFV, Fg System.err.println(sMsg); UL{J%Ze=~ } m<#12#D
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HU`j G0Qw&
mqF public static void log(int sMsg) Vm>E F~ r { >MYDwH System.err.println(sMsg); fyA-*)oHv } kMMgY? } $i5J} W>)0=8#\ %&|
uT /* R]iV;j| **TestMethod.java ,1$F#Eh */ uMS+,dXy package NetFox; C?T\5}h @XV&^l- '.(Gg%*\. public class TestMethod { o1x1SH "8{A4N1B5 }:
HG)V public TestMethod() .'gm2 { ///xx/weblogic60b2_win.exe x9 %=d try{ dQ.#8o= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %gh#gH //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N}K
[Q= SiteFileFetch fileFetch = new SiteFileFetch(bean); IrqM_OjC fileFetch.start(); oDz|%N2s| } E)gD"^rex catch(Exception e){e.printStackTrace ();} #e|o"R;/` 2 HEU dD=$$(
je } a3tcLd|7J 89g
a+#7 JfIXv public static void main(String[] args) 4JAz{aw'b { v{VF>qEP new TestMethod(); og5VB } )hXTgUZa } %+N]$Q 点击下载更多相关资料
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