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/* v\(6uej^ **SiteFileFetch.java y:zNf?6& */ B !x6N" package NetFox; BQ,749^S import java.io.*; f^}n# import java.net.*; 4<<eqxI$| MYJMZ3qBi ?W dY{;& public class SiteFileFetch extends Thread { KWYjN
h#* 3it*l-i\ ,y0 &E8Z SiteInfoBean siteInfoBean = null; //文件信息Bean q(46v`u long[] nStartPos; //开始位置 D
@wIbU long[] nEndPos; //结束位置 %Ze7d& FileSplitterFetch[] fileSplitterFetch; //子线程对象 (uHyWEHt long nFileLength; //文件长度 _^?_Vb boolean bFirst = true; //是否第一次取文件 Ei2M~/ boolean bStop = false; //停止标志 #$ka.Pj File tmpFile; //文件下载的临时信息 sWTa;Qi DataOutputStream output; //输出到文件的输出流 VeEa17g& ,<7HLV //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \ %xku: public SiteFileFetch(SiteInfoBean bean) throws IOException a$iDn_{ { 25 U+L siteInfoBean = bean; =^zGn+@z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); T#e|{ZCbq tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); N3Q
.4?
z9 if(tmpFile.exists ()) Z>/
*q2 { W3('1 bFirst = false; ]T40VGJ:h read_nPos(); u!HbS*jqq } O<AGAD else <v\$r2C* { wqjR-$c nStartPos = new long[bean.getNSplitter()]; r~|7paX! nEndPos = new long[bean.getNSplitter()]; ifl
LY7j } H7drDw \,m*CYs` [\ 0>@j}Z -:!Wds } TQ~a5q 00-2u~D& Om;`"5 public void run() J`; 9Z { E&"V~ //获得文件长度 qm9=Ga5 //分割文件 mU[ //实例FileSplitterFetch [Ak0kH> //启动FileSplitterFetch线程 %LqT>HXJ //等待子线程返回 re4z>O* try{ @tRDKPh if(bFirst) 3C;;z { 5)rN#_BKj nFileLength = getFileSize(); lN"@5(5% if(nFileLength == -1) }0/l48G { 2H] 7 =j System.err.println("File Length is not known!"); FUL'=Xo } ^P.U_2& else if(nFileLength == -2) |<8Fa%!HHc { VV[Fb9W ; System.err.println("File is not access!"); *6}'bdQbNP } 5+b73R3r else 1<Uv4S { z X+i2, for(int i=0;i<nStartPos.length;i++) <jaQ0S{| { T`u
,!S nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6Xn9$C) } ,t*H: * for(int i=0;i<nEndPos.length-1;i++) >~'z% { }Q^*Zq9- nEndPos = nStartPos[i+1]; "2tKh!?Q } pI_:3D
xe nEndPos[nEndPos.length-1] = nFileLength; )RWY("SUy1 } ?oV|.LM:W } _Wp.s]D [ 7pyaHe 6!Mm") //启动子线程 qd'Z|'j fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ts,V+cEA for(int i=0;i<nStartPos.length;i++) VHLNJnA { Hh&qjf fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O sy_C<O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), JPZH%#E( nStartPos,nEndPos,i); ra@CouR^c{ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B oiS fileSplitterFetch.start(); CLuQ=-[| } : S-{a // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #B!M,TWf9s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); k2#|^N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", wT,=C' nEndPos = " + nFileLength); (*T$:/zIS // fileSplitterFetch[nPos.length-1].start(); 2P=~6( L{XW2c$h [{>1wJ Pdj //等待子线程结束 alsD TQ' //int count = 0; ^oE#;aS //是否结束while循环 u2[L^]| boolean breakWhile = false; d+
[2Sm(7 ZC^NhgX uA t{WDHm while(!bStop) _ib
@<% { d*U<Ww^q write_nPos(); Ue>{n{H"y Utility.sleep(500); #D ]CuSi breakWhile = true; 6y^GMlsI {lppv(U U+["b-c for(int i=0;i<nStartPos.length;i++) >4+KEK { h$6~3^g:P if(!fileSplitterFetch.bDownOver) lO 0} { Jy('tfAHp breakWhile = false; I_R 6
M1 break; ;Z`R! } Pj!f^MN } P%!=Rj^ 2m if(breakWhile)
rrphOG break; LEX @hkh vbG&F.P 43O5|8o //count++; 2,|;qFJY-@ //if(count>4) ID{XZ // siteStop(); Tgbq4xR( } -]n%+,3L
3kwkU W|s";EAM System.err.println("文件下载结束!"); }EJ/H3< } i;29*" catch(Exception e){e.printStackTrace ();} hR.vJ2oa } zW)Wt.svP RU>qj
*e @Q;s[Kg{! //获得文件长度 !*?9n^PaF public long getFileSize() @tJic|)x { vF[ 4kDHk int nFileLength = -1; 8f65;lyN try{ h b8L[ 4 URL url = new URL(siteInfoBean.getSSiteURL()); y3PrLBTz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {9^p3Q+:P httpConnection.setRequestProperty("User-Agent","NetFox"); ,^DP B^ddi A<( DYd1H int responseCode=httpConnection.getResponseCode(); =([4pG if(responseCode>=400) dt"& { _,d<9 Y) processErrorCode(responseCode); &rl;+QS return -2; //-2 represent access is error roBb8M|q } $3%+N|L hMV>5Y[s +F2X2e)g" String sHeader; |y+_BZ5 x]3[0K5; ~-R2mAUK for(int i=1;;i++) K{B| { 8N3y(y0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); rI6+St //Utility.log(in.readLine()); p(Osz7K sHeader=httpConnection.getHeaderFieldKey(i); qL[SwEc if(sHeader!=null) Mq'm
TM { l@-h.tS if(sHeader.equals("Content-Length")) (=EDqAZg { f/iMI)J nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ibG>|hV break; Z/|=@gpw } @g]EY&Uzl } 8.+
yZTg else :fq4oHA# break; I`i"*z } t*u#4I1 } }Gy M<!: catch(IOException e){e.printStackTrace ();} XP?)xDr8 catch(Exception e){e.printStackTrace ();} )OVa7[-T (XY`1|])` 1EWZA Utility.log(nFileLength); PrA(==FX/ Xkg Gzg3{fXl return nFileLength; !ab ef.%: } i$<")q (Nv-wU
;Me*#/ //保存下载信息(文件指针位置) ;K%/sIIke private void write_nPos() 5Z6MQ`(k { {t!7r_hj try{ %/5Wj_|p output = new DataOutputStream(new FileOutputStream(tmpFile)); NK(_ &.F
output.writeInt(nStartPos.length); M CP GDr for(int i=0;i<nStartPos.length;i++) y\Utm$)j { ()F{kM8 // output.writeLong(nPos); 1xkrhqq output.writeLong(fileSplitterFetch.nStartPos); DH.UJ+ output.writeLong(fileSplitterFetch.nEndPos); W8;!rFW } B;W%P.<. output.close(); Jyr
V2Tk^ } +lhCF*@*N catch(IOException e){e.printStackTrace ();} %H2ios[UO catch(Exception e){e.printStackTrace ();} qd#7A ksm } ,VSO;:Z c"pOi& 5Dz$_2oM3 //读取保存的下载信息(文件指针位置) 9cU9'r# h private void read_nPos() Bx#=$ka { \<09.q<8 try{ `Pc<0*`a DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); GNq
f int nCount = input.readInt(); bovAFdHW nStartPos = new long[nCount]; L[,19;( nEndPos = new long[nCount]; CjP<'0gT for(int i=0;i<nStartPos.length;i++) r@bh,U$ { $bFK2yx?= nStartPos = input.readLong(); zNdkwj p+ nEndPos = input.readLong(); ASre@pW } kfT*G
+l] input.close(); s(J>yd= } oD1k7Gq1 catch(IOException e){e.printStackTrace ();} Xc}XRKiy{ catch(Exception e){e.printStackTrace ();} 1?1Bz?EKF* } 8N?D1;F; 0y?;o*&U\ pRL:,q\ private void processErrorCode(int nErrorCode) gZ7R^]
k { UxzF5V5 System.err.println("Error Code : " + nErrorCode); 2Q5 @2jT } bv b\G z ynu0X G9yK/g&q //停止文件下载 KAI2[ gs public void siteStop() j%^4
1 y { Y?3tf0t/ bStop = true; ahy6a,)K~ for(int i=0;i<nStartPos.length;i++) 8T6NG!/ fileSplitterFetch.splitterStop(); |%mZ|,[ ?+.C@_QZQ 2zW IB[ } s&-MJ05y } aekke//y //负责部分文件的抓取 *kg->J **FileSplitterFetch.java ?+^p$'5 */ a.}#nSYP package NetFox; M*kE |q/K 0doJF@H UeLO `Ug0; import java.io.*; QuPz'Ut# import java.net.*; /lu|FWbEw >7%T%2N G8klWZAJ public class FileSplitterFetch extends Thread { V-n{=8s zqXF`MAB= m m`#v
g, String sURL; //File URL \AKP ea= long nStartPos; //File Snippet Start Position ||awNSt long nEndPos; //File Snippet End Position bvB',yBZ int nThreadID; //Thread's ID =\5WYC boolean bDownOver = false; //Downing is over G[yzi boolean bStop = false; //Stop identical z+{qQ! FileAccessI fileAccessI = null; //File Access interface fx[&"$X orH6R8P] tm^joK[{|J public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ZL\^J8PRK { o,dp{+({ this.sURL = sURL; 9&AO this.nStartPos = nStart; ,)#rD9ZnC this.nEndPos = nEnd; MK)}zjw nThreadID = id; 1BU97!
fileAccessI = new FileAccessI(sName,nStartPos);//定位 >19s:+ } \\#D!q* UGy3B) to</ public void run() ,.>9$( s { h%ys::\zF while(nStartPos < nEndPos && !bStop) WcNQF!f { dB0#EJaE PENB5+1OK !V3+(o1 try{ L%is"NZh URL url = new URL(sURL); d$3md<lIB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >{tn2Fkg> httpConnection.setRequestProperty("User-Agent","NetFox"); cOX )+53 String sProperty = "bytes="+nStartPos+"-"; wTU$jd1;+ httpConnection.setRequestProperty("RANGE",sProperty); sIgTSdk Utility.log(sProperty); ]B=*p0~j^n T:X* u@ #%SX InputStream input = httpConnection.getInputStream(); aq}hlA(w //logResponseHead(httpConnection); uH%b rbrU PR:B6 F8 A+* lV*@0 byte[] b = new byte[1024]; L,y
q=%h| int nRead; 8xgBNQdPT while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $Z#~wsw { }%/mPbd# nStartPos += fileAccessI.write(b,0,nRead); 8:V,>PH //if(nThreadID == 1) _uMG?Sbx // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); N'WTIM3W } klT?h[I! `D~oY= l_Lz9k Utility.log("Thread " + nThreadID + " is over!");
*af\U3kx bDownOver = true; G&{yM2:E //nPos = fileAccessI.write (b,0,nRead); p7;K] AW } {\`ttc> catch(Exception e){e.printStackTrace ();} D!,5j_,j% } K}re{y } |kPgXq6 |7c],SHm -(:T&rfTp //打印回应的头信息 z@~H{glo public void logResponseHead(HttpURLConnection con) _.; PLq~0 { Yp;Z+!!UZ for(int i=1;;i++) scH61Y8` { J4::.r String header=con.getHeaderFieldKey(i); y,x 2f%x if(header!=null) MLHCBRi //responseHeaders.put(header,httpConnection.getHeaderField(header)); Sc>mw
Utility.log(header+" : "+con.getHeaderField(header)); 'sUOi7U else IeYNTk&< break; e&VC}%m } l%"DeRp,/ } hHJvLs>^ k4LrUd }vZf&ib-
public void splitterStop() -J+1V{ { ~iH a^i?2* bStop = true; :a;F3NJ } it\$Pih] O~V^] q<q IT } KMIe%2:b5 ?m]vk|> Dnw^H. /* {. 9BG& **FileAccess.java auK9wQ%\ *//文件访问(定位,写) \{ EVRRXn package NetFox; giNXXjl import java.io.*; azv173XZ )v_Wn[Y.H erEB4q+ #O public class FileAccessI implements Serializable{ #U`AK9rP_g 1*hE bO //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _dd! nU\A| RandomAccessFile oSavedFile; kiM:(=5 long nPos; LP#wE~K"b YXWDbr:JX U|Fqna public FileAccessI() throws IOException v3Vve:}+ { (1D1;J4g this("",0); K^fs#7 } 5`p9Xo>)yW yR>P 1(BLdP3& public FileAccessI(String sName,long nPos) throws IOException g]vB\5uA: { K{DC{yLu oSavedFile = new RandomAccessFile(sName,"rw"); N=1ue`i this.nPos = nPos; ZEI)U,
I. oSavedFile.seek(nPos); ~@c<5 -`{ } (7G4 v E42)93~C rt*x[5< public synchronized int write(byte[] b,int nStart,int nLen) 88_ef7w { Bu=1-8@=qs int n = -1; PEvY3F}_rh try{ [oU\l+t oSavedFile.write(b,nStart,nLen); f5 bq)Pm& n = nLen; vmAnBY } n5d8^c! 2 catch(IOException e) `YqtI/-w { yk4@@kHW e.printStackTrace (); c46-8z$ } Qa=Y?=Za PSq?8. /";tkad^ return n; p}!i_P } ASbIc"S6 DW7E ]o
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3eS L&kCI`Tb /* D^@@ P **SiteInfoBean.java D{B?2}X */ gEk;Tj package NetFox; {4 Yxh8 Bz } nP9 G7&TMg7i public class SiteInfoBean { DK?aFSf\ (o|bst][S 2@tnOs(* private String sSiteURL; //Site's URL 9k;,WU(K< private String sFilePath; //Saved File's Path aU(.LC private String sFileName; //Saved File's Name o C|oh private int nSplitter; //Count of Splited Downloading File s*Qyd{"z %.=}v7&<z !lfE7|\p public SiteInfoBean() Vpg>K #w {//nSplitter的缺省值为5 t~ {O)tt //default value of nSplitter is 5 ( 5!'42 this("","","",5); 2JK
'!Ry) } Kc\8GkdB nIg 88*6b, +w]#26`d public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ,7@\e&/& { X,w X)9]J sSiteURL= sURL; }BC%(ZH6 sFilePath = sPath; *w@1@6?j sFileName = sName; Cqnuf5e>L this.nSplitter = nSpiltter; aH."|
*. ]?(kaNQ"D i5TGK#3o } \|S%zX 4:rwzRDY flPS+ public String getSSiteURL() KR$Fd { 14'\@xJMM return sSiteURL; x$-kw{N } -/?)0E iz-z?)% 5c::U= public void setSSiteURL(String value) [voZ=+/ { ~Fh+y+g? sSiteURL = value; +ytP5K7 } q~> +x?30 Y!xPmL^]? ~b]enG5xS4 public String getSFilePath() >gp53\ { v)O0i2 return sFilePath; 3/]1m9x }
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\l57 [Ep'm rEWJ3*Hb public void setSFilePath(String value) "yQBHYP { [mv? \HDa~ sFilePath = value; 9
3)fC } ^Saf
z8-3o ZXs,TaU nV8'QDQ:Al public String getSFileName() d\>XfS { \
86g y/ return sFileName; OD~Q|I(j } t4UK~ {gh HY5R 2!-Q!c`y public void setSFileName(String value) `W1uU=c { KMi$0+ sFileName = value; GwF8ze+cH } $[A^8[// +&7V@ .9x*YS public int getNSplitter() lU!_V%n { `_cv& "K9f return nSplitter; -crMO57/ } a&JY x 3}\ z&| z` 6$p1U public void setNSplitter(int nCount) PpFQoY7M { h.R46 : nSplitter = nCount; !T<,fR+8X } X(/fE?%; } VX8rM!3 1_{ e*=/y }i^M<A O /* *~P| ? D' **Utility.java -}<Ru) */ !k%
PP package NetFox; o}r_+\n !IR
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a _}[WX[Le{ public class Utility { +/celp k5K5OpY $H+X'1 public Utility() ^J> m4` { 3A^AEO kkZ}&OXS; L@O>;zp; } 5nib<B%<V ;!f~ //线程睡眠 `r1j>F7Xb public static void sleep(int nSecond) VB90 5% { gnZ#86sO try{ J=Kv-@I>E Thread.sleep(nSecond); Mw,]Pt6~i } s/@uGC0> catch(Exception e) wowf1j- { 8B-PsS|' e.printStackTrace (); EE]xZz>o } 1/mBp+D } {wM<i `\(co;: //日志 EXeV@kg public static void log(String sMsg) yg8= G vO { }JtcAuQt System.err.println(sMsg); Z{vc6oj } O-7)"
TI8\qIW 5yt= ~ public static void log(int sMsg) i
Ehc< { [ p,]/ ^ N System.err.println(sMsg); 'V%w{ZiiV } #tg\
bb } OMk3\FV2Z 8Y8bFWuc afHRy:<+% /* bK }ZR*) **TestMethod.java ;B
| */ X,+a 6F package NetFox; FWeUZI+ ~m<K5K6 V (t3gNin public class TestMethod { DXD+,y\= ,? <;zq 8Ckd.HKpQ public TestMethod() . 0yBI=QI { ///xx/weblogic60b2_win.exe *\#<2 QAe try{ "uuM#@h SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); U*{0, Ue' //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); W2-l_{ SiteFileFetch fileFetch = new SiteFileFetch(bean); A?04,l]y fileFetch.start(); v(Kj6 ' } 0=
bXL!] catch(Exception e){e.printStackTrace ();} Q'jGNWep f9UDH8X Efe(tH2q } mEYfsO 9[\do@ TT9
\m=7 public static void main(String[] args) k;<@2C { g:~q&b[q6 new TestMethod(); bHm/Z Zx } RLex#j } 13 L&f\b 点击下载更多相关资料
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