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/* Cdz&'en^ **SiteFileFetch.java 0!\C@wnH */ 2`$*HPj+G package NetFox; gT+g@\u[ import java.io.*; a|7C6#iz$ import java.net.*;
/:4J @.eN+o9| @ep.wW public class SiteFileFetch extends Thread { N>H@vt~ 3U@jw,K!{A ]<>cjk.ya SiteInfoBean siteInfoBean = null; //文件信息Bean =6[.||9 long[] nStartPos; //开始位置 u?Ffqt9' long[] nEndPos; //结束位置 ?s^qWA FileSplitterFetch[] fileSplitterFetch; //子线程对象 )j36Y =r3 long nFileLength; //文件长度 ,<rC,4-F< boolean bFirst = true; //是否第一次取文件 h+Co:pr boolean bStop = false; //停止标志 */;7Uv7 File tmpFile; //文件下载的临时信息 ,TQec:B DataOutputStream output; //输出到文件的输出流 IgX &aW >&PM'k //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) jq,M1 public SiteFileFetch(SiteInfoBean bean) throws IOException &j F'2D^_ { *-nO,K>y` siteInfoBean = bean; Te+(7
Z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); *4U_MM#rX tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); gZ,h95' if(tmpFile.exists ()) odhS0+d^ { g-sNYd%?a bFirst = false; /4an@5.\C read_nPos(); p3=Py7iz } m)tu~neM else JQ1MuE' { Ss>pNH@c nStartPos = new long[bean.getNSplitter()]; |U|>YA1[b nEndPos = new long[bean.getNSplitter()]; J\@6YU[A } R.^]{ 5 f*o Njc@5*rJ& kW/G=_6 } RpivO, lx:$EJ *:n~j9V- public void run() {rKC4: { h3?>jE=H //获得文件长度 SOOVUMj //分割文件 u<ed O+ //实例FileSplitterFetch WO qDW~ //启动FileSplitterFetch线程 a2Ak?W1 //等待子线程返回 -l= 4{^pK try{ w|9 >4 if(bFirst) "2cOS PpQL { 8fXiadP# nFileLength = getFileSize(); !Y~UO)u2 if(nFileLength == -1) Y2r}W3F= { Q@W/~~N System.err.println("File Length is not known!"); cRT'?w`} } 9J3fiA_ else if(nFileLength == -2) ?\V#^q- { B6
0 System.err.println("File is not access!"); e(0OZ_ w } Ehx9-*] else Tv=lr6t8 { (7Z+ De? for(int i=0;i<nStartPos.length;i++) `8!9Fp { h=#w< @ nStartPos = (long)(i*(nFileLength/nStartPos.length)); `B)@ } _,J+b R+b for(int i=0;i<nEndPos.length-1;i++) |MwV4^ { I1<WHq
nEndPos = nStartPos[i+1]; 6'# 5Dqw"r } TjUwe@&Rw nEndPos[nEndPos.length-1] = nFileLength; .?:*0 } lFzVd
N } =1IK"BA2? ok:uTeJI S1QMS //启动子线程 uM2@&)u fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; AF'< for(int i=0;i<nStartPos.length;i++) %(YQ)=w { `Lr], >aG fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /|?$C7%a\D siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h&0zR#t nStartPos,nEndPos,i); cC/h7odY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); PgkU~68` fileSplitterFetch.start(); |+nmOi,z } \&Yn)|! // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eAy,T<# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); . &^p@A~ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6w^P{%ul nEndPos = " + nFileLength); ( /]'e} // fileSplitterFetch[nPos.length-1].start(); Z8SwW<{ $
2v{WX FLi'}C //等待子线程结束 6<lo0PQ"Z //int count = 0; x92^0cMf //是否结束while循环 y]h0c<NP boolean breakWhile = false; !..<_qfw : K|
H/kht 'PF>#X'' while(!bStop) 5u!\c(TJ+ { eEZgG=s write_nPos(); f$lb.fy5 Utility.sleep(500); 0S{23L4C breakWhile = true; -|.NwGh 8 .%0JJ .3 )3h\QE!z for(int i=0;i<nStartPos.length;i++) sYKx3[ V/ { AQ,lLn+ if(!fileSplitterFetch.bDownOver) ;(i6 X) { +mocSx[ breakWhile = false; (nqry[g& break; *ID=X!v } 94tfR$W;- } kdNo<x1o if(breakWhile) FGV
L[\ break; a"jE\OZ{+s rW?WdEg j9
nw,x$ //count++; <%)vl P#@ //if(count>4) L `1 ITz // siteStop(); `5Y*)
q } f?5>V /QXUD.(
8 bmG`:_ System.err.println("文件下载结束!"); z
CLaHx! } t`o"K catch(Exception e){e.printStackTrace ();} $_.t'8F } 5Tl5T& b| L;*<KU <C`bf$ak //获得文件长度 EFX2>&mWo8 public long getFileSize() [q9B"@X { 0*{(R# int nFileLength = -1; \YvG+7a try{ Dz }i-tw+ URL url = new URL(siteInfoBean.getSSiteURL()); [ws
_ g,/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &N}"4 httpConnection.setRequestProperty("User-Agent","NetFox"); e9LX0= ~`
tuPk~l 0Ui.nz j int responseCode=httpConnection.getResponseCode(); i2<z"v63 if(responseCode>=400) u&zY>'}zm { 5 ^{~xOM5 processErrorCode(responseCode); *Soi return -2; //-2 represent access is error Tz,-~ mc } 5Kzt8Tv[ {ZeY:\G~ Fd9[Pe@?` String sHeader; Ud/>oaW?s m\>gOTpA4 Y|tHU'x for(int i=1;;i++) `D+zX { Olzw)WjG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5%,3)H{;t //Utility.log(in.readLine()); pCKP{c=6Q sHeader=httpConnection.getHeaderFieldKey(i); /2K"Mpf8 if(sHeader!=null) K6v~!iiK$ { I5"wa:Z if(sHeader.equals("Content-Length")) ^+(5[z { Q>1BOH1by nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Z=Y29V8 break; <nk|Z'G E } Nc+0_|, } >G`p T# else hUMG}< break; %1#\LRA( } '{d_q6,% } ,3:f4e\< catch(IOException e){e.printStackTrace ();} T~UDD3 catch(Exception e){e.printStackTrace ();} +5y^c|L0 ";/]rwHa) NpVL;6?7T Utility.log(nFileLength); ZKi&f,:
'w:ugb9] 6P{bUom? return nFileLength; y [Vd*8 } +<E#_)}`D6 P'~`2W0sz >2#<gp3 //保存下载信息(文件指针位置) er3Mvw private void write_nPos() 6))":<J { v`4w=!4 try{ 9^*RK6 output = new DataOutputStream(new FileOutputStream(tmpFile)); %H\b5&
_y output.writeInt(nStartPos.length); HI5NWdfRl for(int i=0;i<nStartPos.length;i++) t'_EcYNS { 2}^=NUM\NX // output.writeLong(nPos); {6u)EJ output.writeLong(fileSplitterFetch.nStartPos); kff N0(MR output.writeLong(fileSplitterFetch.nEndPos); #S7oW@ } >LPb>t5%p output.close(); 7-S?RU]g } !8@yi"n catch(IOException e){e.printStackTrace ();} P>_O :xD catch(Exception e){e.printStackTrace ();} 2Bt/co-~4 } yi8vD~aA[ i#:To
|\u b!H1|7> //读取保存的下载信息(文件指针位置) gJ l^K private void read_nPos() +P(*S { Gamn,c9 try{ <EC"E #p DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); aImzK/ int nCount = input.readInt(); t jM9EP nStartPos = new long[nCount]; rxp|[>O< nEndPos = new long[nCount]; C^q|(G) for(int i=0;i<nStartPos.length;i++) Jt$YSp=!! { &g?GF\Y nStartPos = input.readLong(); g1t6XVS$9 nEndPos = input.readLong(); 3,i j@P } ld(60?z>FH input.close(); i9 aR# } !Yc:yF catch(IOException e){e.printStackTrace ();} !gI0"p? catch(Exception e){e.printStackTrace ();} o@A`AA9 } ~&~4{ c|<F8n hNc8uV{r= private void processErrorCode(int nErrorCode) CVO_F=; { xa`xHh{0 System.err.println("Error Code : " + nErrorCode); ,!>
~izB } 4Uny.C] Yo %U{/e t'K+)OK //停止文件下载 ;"D}"nL public void siteStop() d- ZUuw { Lv+{@) bStop = true; + }"+ for(int i=0;i<nStartPos.length;i++) 2*snMA fileSplitterFetch.splitterStop(); mc]+j,d H:~bWd'iz 8cO?VH,nk } 1e\cJ{B } [>NMuwtG //负责部分文件的抓取 %Za}q]? **FileSplitterFetch.java IYn`&jS{ */ )B]"""J package NetFox; wXQu%F3 ~2*LWH*@ ]{=y8]7 import java.io.*; -gGw_w?)( import java.net.*; M2%@bETJ jNxTy UU =*fq5v public class FileSplitterFetch extends Thread { #GGa, @O kO)Y|zQ 0=,Nz String sURL; //File URL X!h>13fW long nStartPos; //File Snippet Start Position !$98U~L long nEndPos; //File Snippet End Position {
{?-&
yA int nThreadID; //Thread's ID J>R$K boolean bDownOver = false; //Downing is over ^.J_ w boolean bStop = false; //Stop identical SB%D%Zx6'% FileAccessI fileAccessI = null; //File Access interface POk5+^ =.s0"[% pwMA,X/{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException cPcH
8Vd { i>S@C@~ this.sURL = sURL; /@
emE0 this.nStartPos = nStart; W(s5mX,Kv this.nEndPos = nEnd; 1*A^v nThreadID = id; bF9.k fileAccessI = new FileAccessI(sName,nStartPos);//定位 &Sb)a } ]6(%tU 8}yrsF# 4evN^es'I_ public void run() XR]bd { ;):;H?WS|A while(nStartPos < nEndPos && !bStop) &wDZ@{h { <e! TF@ KxErWP% >}wFePl try{ _'!qOt7D URL url = new URL(sURL); .+(ED HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h,y_^cf httpConnection.setRequestProperty("User-Agent","NetFox"); UD14q~ (1Z String sProperty = "bytes="+nStartPos+"-"; :YLs]JI< httpConnection.setRequestProperty("RANGE",sProperty);
Wx}-H/t'2 Utility.log(sProperty); -e$ T}3IV Qz=e'H 4wv0~T$;x InputStream input = httpConnection.getInputStream(); 4Kt0}W //logResponseHead(httpConnection); =zH)R0!eG F
u5zj\0J
cQ$[Ba byte[] b = new byte[1024]; ~;6^n int nRead; *_YH}U while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0v EQgx> { qbQdxKk nStartPos += fileAccessI.write(b,0,nRead); .0,G4k/yv //if(nThreadID == 1) a{ke%W$*P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &W3srJo } t[;-gi,, 5OPvy,e6 zvGncjMkC Utility.log("Thread " + nThreadID + " is over!"); v~x`a0 bDownOver = true; c)Ng9p //nPos = fileAccessI.write (b,0,nRead); cGs&Kn;h } PE;<0Cz\ catch(Exception e){e.printStackTrace ();} 3 }sy{Mx%9 } fP
3eR>e } ]Ky`AG`2~ N MkOx$ VN09g& //打印回应的头信息 Qn$YI9t public void logResponseHead(HttpURLConnection con) W
$mw9 { d lAb`ne for(int i=1;;i++) l?b*T#uIk { '_Q';T_n99 String header=con.getHeaderFieldKey(i); )Ko~6.:5H if(header!=null) z(,j)". //responseHeaders.put(header,httpConnection.getHeaderField(header)); +P+h$gQ Utility.log(header+" : "+con.getHeaderField(header)); >KQ/ c else <iH break; L{1[:a)']B } $ r-rIW5\ } djoP`r 'w1ll9O 'k}w|gNB public void splitterStop() IR3+BDE)> { N`d%4)|{ bStop = true; _s<BXj } 'A3*[e|OS ]N\D^`iQ K}N~KDW R| } d" 0&=/ Ya~Th)'>q Y_C6*T% /* ^N^s|c' **FileAccess.java )l(DtU!E *//文件访问(定位,写) NZG
^B/ package NetFox; |F\fdB}?S: import java.io.*; U:@tdH+A7 jT]R"U/Q ./zzuKO8XK public class FileAccessI implements Serializable{ ;FuST (QojIdHt //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `wIWK7i RandomAccessFile oSavedFile; C2b<is=H: long nPos; k|RY;
8_
"Q\b6
7Ch wmX(%5vY^ public FileAccessI() throws IOException ,jW a&7 { I\-M`^@ this("",0); UCj<FN ` } YuHXm3[ :}q)]W @o1#J`rv public FileAccessI(String sName,long nPos) throws IOException "9X!Ewm"P { vqVwo\oEdU oSavedFile = new RandomAccessFile(sName,"rw"); Kv:.bHN} this.nPos = nPos; pI.8Ip_r oSavedFile.seek(nPos); u^i3 @JuX } .qf~t/o 4\ElMb[] }fef* >>} public synchronized int write(byte[] b,int nStart,int nLen) 5zZQt+Ip { BhjDyB int n = -1; BaUuDo/ZO try{ Q t>|TGz oSavedFile.write(b,nStart,nLen); ]R!YRu n = nLen; <EE^ KR96 } M(C$SB> catch(IOException e) vxi_Y\r=T { !?J-Y e.printStackTrace (); 5-H"{29 } PQ;9iv B>I:KGkV _d^d1Q}V return n; +BhJske } S{)K_x <gFisc/#r &Cm]*$? } Hj `\Fm*A cdGBo4
V_e /* RU/SJ1wM" **SiteInfoBean.java I#]pk! */ 6f
t6;*, package NetFox; >Y\?v-^~; OwNo$b]h` @.)[U:N public class SiteInfoBean { xzFQ)t& [wJ\.9<Oa / $s(OFbi# private String sSiteURL; //Site's URL M^e}w!U private String sFilePath; //Saved File's Path 5yj# 9H private String sFileName; //Saved File's Name OTAe#]# private int nSplitter; //Count of Splited Downloading File O:~J_Wwl! MXDCOe~07 !I&,!$ public SiteInfoBean() P1^|r} {//nSplitter的缺省值为5 3xdJ<Lrq //default value of nSplitter is 5 Q Wc^}#!! this("","","",5); %\}5u[V } AOwmPHEL IAN={";p 0S&J=2D! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) mfffOG { E.0J94>iM sSiteURL= sURL; `|v/qk7
^? sFilePath = sPath; z;/8R7L& sFileName = sName; D6fd(=t1Z this.nSplitter = nSpiltter; 'qG-)2
t ox\D04:M R>&8%%# } \L}7.fkb8 l,3,$ R[*n3
wB public String getSSiteURL() 62Tel4u { xpu2RE return sSiteURL; f<|*^+ } 3zc;_U2 Jt<J#M<}7 5')]Y1J public void setSSiteURL(String value) xsy45az<ip { ;R<V-gab sSiteURL = value; ,!PV0(F( } B&1E&Cv_8 f#7=N{wm S,avvY.U\ public String getSFilePath() GDiyFTr { ,Jn` qvmi return sFilePath; 4M6[5RAW{ } w-NTw2x,& Tdz#,]Q knpdECq&k public void setSFilePath(String value) 3J/l>1[ { )iK:BL*Nw sFilePath = value; cW"DDm
g } jP2#w{xq |b^UPrz)VS $A/?evJi8R public String getSFileName() d%nX;w,
{ 1A#/70Mo return sFileName; OQKc_z'" } ,q7FK z{ 7|_2@4-W6 3-1a+7fD public void setSFileName(String value) .j>MsQP#\C { OA} r*Wz sFileName = value; 23,pVo } J6>tGKa+e _% \% EAxdF
u public int getNSplitter() WB<MU:.Vc { gf9U<J#&C return nSplitter; S;D]ym } bGy|T*@ @de0)AJG6 9HlWoHuC public void setNSplitter(int nCount) a'n17d& { d+ZXi' nSplitter = nCount; cD)9EFo } dD~H ft } f5{|_]q] <r>Sj/w<D WiQVZ{ /* o1*P|.`
**Utility.java 3 p?nQ
O)L */ C+%eT&OO package NetFox; DnG9bVm> z}Us+>z+jc #T{)y public class Utility { F+ RE b353+7"| X=lsuKREZ public Utility() i3d2+N` { 0w< ilJ sX3qrRY L$+_ } iWFtb)3B >ke.ZZV? //线程睡眠 oR,zr public static void sleep(int nSecond) _iEnS4$A8 { "O|.e`C%^ try{ | WTWj Thread.sleep(nSecond); .jC5 y& } kt\,$.v8 catch(Exception e) EA9.?F
{ jENC1T( e.printStackTrace (); _O11SiP] } d<HO~+9 } jAv3qMQA HvKdV`bz //日志
4~ L1~Gk public static void log(String sMsg) . &`YlK { >}2
,2 System.err.println(sMsg); 0E,QOF{o } fR+{gazk
n Doq}UWp KhX)maQ public static void log(int sMsg) fE&s 6w& { nt-_)4Fm System.err.println(sMsg); r:E4Wi{\ } }[drR(]`dO } _8F;-7Sz KsK]y,^Z ;3xi.^=B /* gy~2LY !} **TestMethod.java `-R&4%t% */ v}D0t] package NetFox; *QIYq wJp1Fl~ I|>.&nb public class TestMethod { J7aYi]vI /me ]sOkn @p}_"BHYWt public TestMethod() %hw4IcWJ| { ///xx/weblogic60b2_win.exe KIR3m
) try{ LpSF*xm SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2QEH!)lvr //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .J&89I]U SiteFileFetch fileFetch = new SiteFileFetch(bean); 5} ur,0{ fileFetch.start(); <sM_zoprc } U>bIQk"4 catch(Exception e){e.printStackTrace ();} 'irwecd8 `
"-P g5 e8oAGh" } ~Cw7.NA{3 !$ii*} =h
+SZXe<r public static void main(String[] args) }Qe(6'l_ { D^P0X:T] new TestMethod(); %zRuIDmv } r!eW]M } N;BuBm5K 点击下载更多相关资料
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