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/* B^E2UNRA **SiteFileFetch.java DW'0j$; */ "~.8eKRQ package NetFox; }Bv30V2-( import java.io.*; ~ex~(AWh import java.net.*; wFKuSd >\^N\& '[7C~r{% public class SiteFileFetch extends Thread { l4R<`b\Jt k1~nd=p JKEXYE SiteInfoBean siteInfoBean = null; //文件信息Bean Q'
OuZKhA long[] nStartPos; //开始位置 RZcx4fL}x long[] nEndPos; //结束位置 Pf^Ly97 FileSplitterFetch[] fileSplitterFetch; //子线程对象 O=4ceEmz long nFileLength; //文件长度 /6Jy'"+'0 boolean bFirst = true; //是否第一次取文件 4]|9!=\
boolean bStop = false; //停止标志 ~ wJ3AqNC? File tmpFile; //文件下载的临时信息 wj5qQ]WC DataOutputStream output; //输出到文件的输出流 =R"Eb1 M ,.0[+ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -(%ar%~Zd public SiteFileFetch(SiteInfoBean bean) throws IOException p@!@^1j= { LOyCx/n siteInfoBean = bean; < e7<t9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); s$2l"|h>B tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); LZZ:P if(tmpFile.exists ()) y~4SKv
$ { l,^i5t' bFirst = false; 8Izn'>" read_nPos(); V'f&JQA } VR5e CJ:i else 3.K{T { Lk8W&|;0| nStartPos = new long[bean.getNSplitter()]; v"G%5pq*\ nEndPos = new long[bean.getNSplitter()]; _k"&EW{ Ii } qCxD{-9x{ % RBI\tj #buV;!_!E? 3& fIO } b}}1TnS) tNi%}~Z T?p`Y| gl public void run() a@V/sh { S,)|~#5x //获得文件长度 6|"!sW`%N //分割文件 8R??J>h5\ //实例FileSplitterFetch avbr7X( //启动FileSplitterFetch线程 Ma*dIwEp //等待子线程返回 _L `N^I. try{ XYxm8ee"j if(bFirst) 4/-))F&s { &Curvc1fm nFileLength = getFileSize(); 7KSGG1ts if(nFileLength == -1) zw%n!wc_\ { #)h
~.D{ System.err.println("File Length is not known!"); $<>EwW } bVAgul=__ else if(nFileLength == -2) skC|io-Zv { 44fq1<.K System.err.println("File is not access!"); _:fO)gs|1 } -'p@ lk else *?R\[59 { !=h|&Vta for(int i=0;i<nStartPos.length;i++) mrLx]og, { y
T1Qep nStartPos = (long)(i*(nFileLength/nStartPos.length)); /i~^LITH } EV?47\~ for(int i=0;i<nEndPos.length-1;i++) ZR01<V { R6WgA@Z|r nEndPos = nStartPos[i+1]; h<^:Nn } U<,Kw6K nEndPos[nEndPos.length-1] = nFileLength; ,Q /nS$ } $bi_i|? } D@4&@> ,;=( )- <@AsCiQF //启动子线程 !$KhL.4P fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Mn }Z9S[ for(int i=0;i<nStartPos.length;i++) ("JV:u.L+ { uZiY<(X fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gt t$O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
UA!Gr3 nStartPos,nEndPos,i); j~L1~@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %[\Ft fileSplitterFetch.start(); !qw=I( } $qUta<o2@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \gI:`>-
x siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); h@m n
GE // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", :2UC{_ nEndPos = " + nFileLength); b-(UsY: // fileSplitterFetch[nPos.length-1].start(); :kiO FskJyB[ >eG&gc@$1$ //等待子线程结束 1-NX>E5 //int count = 0; dj'8x48H2W //是否结束while循环 nwZr3r boolean breakWhile = false; ,<P[CUD&& *A1TDc$ }jY[| >z while(!bStop) W6xjqNU { ]20"la5 write_nPos(); X-N$+[# Utility.sleep(500); IL6f~! breakWhile = true; "k1Tsd- =@jMx^A" ks#Z~6+3 for(int i=0;i<nStartPos.length;i++) /jn3'q_, {
&pY G if(!fileSplitterFetch.bDownOver) u g:G9vjQ { i(f;'fb* breakWhile = false; \Af|$9boHz break; On.x~t } xE-c9AH } `w=H'"Zv if(breakWhile) dK;\`>8 break; .kKwdqO+zB ~!d)J L|1zHDxQ //count++; FqUt uN
//if(count>4) q}F%o0 // siteStop(); #HuA(``[d } O"^a.`27 &P{p\ v2Y 4d._Hd=' System.err.println("文件下载结束!"); 6[|< } "QFADk1 catch(Exception e){e.printStackTrace ();} AB&wn>q } |m 5;M$M) ?!
_pP| E e\-q //获得文件长度 :0j`yo:w public long getFileSize() //5_E7Ehu$ { hCvLwZ?LF int nFileLength = -1; ryp$|?ckJ try{ #Xw[i URL url = new URL(siteInfoBean.getSSiteURL()); . nF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kq.h\[ httpConnection.setRequestProperty("User-Agent","NetFox"); vgW1hWmHJ l
75{JxZX O-lh\9{'R int responseCode=httpConnection.getResponseCode(); 07"Oj9NlA if(responseCode>=400) W]}V<S$ { %3+hz$E processErrorCode(responseCode); a={qA4N return -2; //-2 represent access is error zcWxyLifl0 } "gikX/Co= 5m7Ax]\ I nK)O'; String sHeader; P5xmLefng wYMX1= XhD fI
& for(int i=1;;i++) *n_4Rr { 8Gg/M%wq9U //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |21hY //Utility.log(in.readLine()); RowiSW sHeader=httpConnection.getHeaderFieldKey(i); 2T%f~yQ^ if(sHeader!=null) ^?]H$e { ftH%, /, if(sHeader.equals("Content-Length")) TIhzMW\/K { :;WDPRx nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Eg29|)qsz break; 5YH
mp7c-z } wVJFA1 } Ml/p{ *p else J+NK+,_*M break; OHnjI>/ } 5_C#_=E } 5t#]lg[06' catch(IOException e){e.printStackTrace ();} }<h.
chz, catch(Exception e){e.printStackTrace ();} /P"\+Qp Ib8{+j khIa9Nm Utility.log(nFileLength); &FF. Ddt{ ?[B[ F D=sc41] return nFileLength; j"u)/A8* } 6:tr8 X_ v]U;5Uo de47O //保存下载信息(文件指针位置) Hf{%N'4 private void write_nPos() ^|{fB,B { \` ^Tbn: try{ T|2%b*/ output = new DataOutputStream(new FileOutputStream(tmpFile)); 5t?2B] output.writeInt(nStartPos.length); sLqvDH?V for(int i=0;i<nStartPos.length;i++) Rs[]i; { Lbp6I0&n // output.writeLong(nPos); l4reG:uYG output.writeLong(fileSplitterFetch.nStartPos); xi. KD output.writeLong(fileSplitterFetch.nEndPos); X3O$Sd(D } Z2jb>% output.close(); iPO
S } I8;[DP9 catch(IOException e){e.printStackTrace ();} rg/vxTl catch(Exception e){e.printStackTrace ();} azc:C } emPm^M5/K 7O^ S.( :=eUNH //读取保存的下载信息(文件指针位置) 8vW`E_n private void read_nPos() &it/@8yH { (+ anTA= try{ :Rj,'uH+h) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); n1(X%%2 int nCount = input.readInt(); &)jZ|Q~ nStartPos = new long[nCount]; K)\gbQ| nEndPos = new long[nCount]; m9cT}x&j for(int i=0;i<nStartPos.length;i++) r['C.S6 { 9G/2^PI nStartPos = input.readLong(); DJ0T5VE W3 nEndPos = input.readLong(); wu&7#![, } *v/*_6f* input.close(); :]QxT8B } E2kRt'~N catch(IOException e){e.printStackTrace ();} G@!9)v]9 catch(Exception e){e.printStackTrace ();} hP<qK Vy } Q 9<_:3 >D62l*V C) r!,V_a4n private void processErrorCode(int nErrorCode) f.^w/ GJO/ { @2*6+w_Ae System.err.println("Error Code : " + nErrorCode); tgA
|Vwwk } Pp hQa!F$ S9oGf ]X|G+[Ujv //停止文件下载 S`w)b'B!M public void siteStop() !PIdw~YC { S]/+n> bStop = true; D07u? for(int i=0;i<nStartPos.length;i++) m
kf{_!TK fileSplitterFetch.splitterStop(); PzDgl6C Asu"#sd Lo9?,^S } P<x } <U pjAuG8 //负责部分文件的抓取 }h6z&:qA[? **FileSplitterFetch.java TN`:T.B */ yo?Q%w'Nh package NetFox; xR`2+t&t j pv,0( cSk}53 import java.io.*; ", ) import java.net.*; 5VbNWrw i%8 sy :XZ
pnjj public class FileSplitterFetch extends Thread { :zRboqe(cc uK5x[m oH"N>@ Vl String sURL; //File URL F|Q#KwN long nStartPos; //File Snippet Start Position ^T,cXpx| long nEndPos; //File Snippet End Position I0RWdOK8K int nThreadID; //Thread's ID c$fM6M
} boolean bDownOver = false; //Downing is over P,_E 4y boolean bStop = false; //Stop identical 1hi j4m$b FileAccessI fileAccessI = null; //File Access interface 5wX>PJS `,d7_#9' G)7sXEe public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException q/?_djv { hGV/P94 this.sURL = sURL; Q#KjX;No this.nStartPos = nStart; `oBzt|f5 this.nEndPos = nEnd; <=M }[ nThreadID = id; o7zfD94I fileAccessI = new FileAccessI(sName,nStartPos);//定位 6u7wfAf } qr6jn14.c */E{s? n\Ixv public void run() S
&u94hlC { ||aU>Wj4 while(nStartPos < nEndPos && !bStop) >,3
3Jx { 9lV'3UG-? 4PQWdPv; KL4/"$l] try{ Q@n k T1o URL url = new URL(sURL); e IA=?k.y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J]B5w{??b httpConnection.setRequestProperty("User-Agent","NetFox"); `l"~"x^Rr String sProperty = "bytes="+nStartPos+"-"; {eUfwPAa3 httpConnection.setRequestProperty("RANGE",sProperty); 6<Z9p@6 Utility.log(sProperty); h[T3WE e
AjtW qg [dMxr9M InputStream input = httpConnection.getInputStream(); :^a$ve3(Jq //logResponseHead(httpConnection); ,-)1)R\. N{g=Pf?I} n4johV.# byte[] b = new byte[1024]; +E4_^ int nRead; \.]
U while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) E"=$p$k { bAp`lmFI nStartPos += fileAccessI.write(b,0,nRead); GWKefH //if(nThreadID == 1) ;rgsPVbVf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 51x,[y+Xe } tO7{g #Gx@\BE{ ~vmY2h\ Utility.log("Thread " + nThreadID + " is over!"); 4a-wGx#h bDownOver = true; v0=~PN~E //nPos = fileAccessI.write (b,0,nRead); /
yCV-L2J } {NR~>=~K- catch(Exception e){e.printStackTrace ();} ]mSVjF3l } -eTGRr } =%LS9e^7D 2dfA}i>k
r DuG[" //打印回应的头信息 k"J?-1L public void logResponseHead(HttpURLConnection con) zVu}7v() { OK=t)6&b for(int i=1;;i++) GF&"nW9A { o/R-1\Dn String header=con.getHeaderFieldKey(i); Wm 61 if(header!=null) s/V[tEC*z //responseHeaders.put(header,httpConnection.getHeaderField(header)); t&_lpffv Utility.log(header+" : "+con.getHeaderField(header)); ^^#A9AM else vs~*=d27Pf break; Vs
>1%$If } i^#RiCeo } UWI5/R ?W()Do1tR GfDA5v[ public void splitterStop() k4v[2y` { ',f[y:v; bStop = true; U|=y&a2Rb } *"@P2F& I,D=ixK 'PZJ{8= } Gx
m"HC `|R{^Sk1o K\G|q}E/1 /* TUG3#PSnm* **FileAccess.java Mtu8zm *//文件访问(定位,写) x)*[>d2yd package NetFox; 0!Yi.'+ import java.io.*;
Xma0k3;- ;I>`!|mT kDsUKO
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public class FileAccessI implements Serializable{ _>s.V`N' #ed]zI9O //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6*$N@>8& RandomAccessFile oSavedFile; y^ohns5{ long nPos; AWw'pgTQX Lxl?6wZ (U)=t$=o public FileAccessI() throws IOException \2Yh I0skW { 95}"AIi this("",0); &A~ 1Q#4 } n}2}4^ Rzp-Q5@MY p~t$ll0s public FileAccessI(String sName,long nPos) throws IOException rie1F, { \C#Vh7z"2& oSavedFile = new RandomAccessFile(sName,"rw"); 4_$f"6 this.nPos = nPos; AWw:N6\ oSavedFile.seek(nPos);
&f[[@EF7 } ipsNiFv: so;aN'{6@ bz1\EkLL public synchronized int write(byte[] b,int nStart,int nLen) bkb}M)C { {+!_; zzZ int n = -1; 2l9_$evK~ try{ kns[b [!H oSavedFile.write(b,nStart,nLen); s:%>H|- n = nLen; NFQ0/iuW } l1@:&j3h catch(IOException e) =uHTpHR { Xr@0RFdr[ e.printStackTrace (); M:ttzsd } sviGS&J9h kY|<1Ht {2!.3<# return n; (q)W<GYP } @ ~PL|Pp_ xMe[/7)4 &4DWLI } ~U`aH~R gX[6WB"p y<)x`&pcD /* f+rBIE **SiteInfoBean.java wEdXaOEB5 */ |KuH2,n0 package NetFox; L;Nm"[` \hg12],#:@ xk#/J]j public class SiteInfoBean { kc}e},k T7[ItLZ $cjidBi`): private String sSiteURL; //Site's URL ]2?t$"G8 private String sFilePath; //Saved File's Path +g(QF private String sFileName; //Saved File's Name 8xLvpgcZ private int nSplitter; //Count of Splited Downloading File -e30! A )nQ.6 `w2hJP public SiteInfoBean() 90;[5c
{//nSplitter的缺省值为5 }.x?$C+\" //default value of nSplitter is 5 a(F%M this("","","",5); A%pcPzG; } {@k5e)
Q ENygD 66v6do7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) /mmCqP { |[8&5[); sSiteURL= sURL; IG
6yt sFilePath = sPath; q45Hmz sFileName = sName; h60*=+vdJ this.nSplitter = nSpiltter; 4\3Z$%2^LZ |*Hw6m U5odSR$ } PC/Oo~Gx woQYP, 3s" Rv@ public String getSSiteURL() [*@"[u { 4;x{@Ln return sSiteURL; UE5T%zd / } o@vo,JU tv5G']vO\ 6Z0@4_Y@B6 public void setSSiteURL(String value) aH*)W'N? { $0
eyp]XC\ sSiteURL = value; 3V2"1Ic } ^As^hY^p
LGV"WE VD,g public String getSFilePath() n)gzHch { ) m[0, return sFilePath; -b8Vz}Y } ckS.j)@.c -m3O\X V^[o{'+ public void setSFilePath(String value) ,,OO2EgZ` { pri=;I(2A sFilePath = value; b 'jZ4{+W } /{6PwlP5 P-.>vi^+ u?i_N0H public String getSFileName() 8i;EpAwB { j@
lHgis return sFileName; f.4r'^ } 2Gd.B/L6 To.CY^M "k[-eFz/@M public void setSFileName(String value) )%I2#Q"Nt- { 1^jGSB.%A sFileName = value; yHsmX2s } ,3 =|a|p Y j;KKgk ~dg7c{o5 public int getNSplitter() ]c4?-Vq%u { Dk[m)]w\ return nSplitter; B&3oo } wylbs@ ..'k+0u^ -^yb[b, public void setNSplitter(int nCount) (e.?). e { &@NTedg! nSplitter = nCount; aNs~Uad1U } K Rs
e } 4>x]v!d hH_&42E6 >$Sc}a3 /* :s DE'o **Utility.java 2:3-mWE */ TrD2:N}dI package NetFox; Er509zZ,[ D+.<
kY. /P { Zo public class Utility { CobMagPhr Xfo3fW)s uyZ public Utility() ?tx%KU\3 { J)tk<&X O<}3\O )G( ZFYv|2l }
0N9`WK nE;^xMOK! //线程睡眠 t+y$i@R: public static void sleep(int nSecond) HGIPz{/5U { DO6Tz-%o try{ !D#wSeJ Thread.sleep(nSecond); q=Xd a0c } 742sqHx catch(Exception e) a_}k^zw( { RI.6.f1dy e.printStackTrace (); ;J[ed>v;3 } /q[5-96c } <j\osw1R max 5s$@ //日志 3>vSKh1z public static void log(String sMsg) {P/ sxh:e { V;}kgWc1 System.err.println(sMsg); o\<m99Ub } *WTmS2?'h *XN|ZGl/ [=/Yo1:v public static void log(int sMsg) 9NzK1V0X { _%M+!Ltz System.err.println(sMsg); 6WI-ZEVp& }
P}kBqMM } 5@ c/,6l n@1;5)&k~ #WE"nh9f|z /* 8d4:8} **TestMethod.java 4sJM!9eb[ */ -o:
ifF| package NetFox; ;zq3>A itotn!Wb` 3jR> public class TestMethod { JdYmUM|K/c B8=r^!jEL n{Ce%gy public TestMethod() uO]^vP]fT { ///xx/weblogic60b2_win.exe 7
k:w3M try{ 8&K1;l } SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |aWeo.;c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); *aem5E`c SiteFileFetch fileFetch = new SiteFileFetch(bean); skSs|slp fileFetch.start(); Dqxtc|vo } Gz09#nFZk catch(Exception e){e.printStackTrace ();} C6<*'5T ~%gO +qD SK][UxoHm } Wb)>APL /kZ{+4M +F>9hA public static void main(String[] args) y"bSn5B[ { p-CBsm5P new TestMethod(); A5WchS' } -9D2aY_> } c>~q2_}W( 点击下载更多相关资料
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