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/* c~+l|r=u? **SiteFileFetch.java n~k9Z^ $ */ q#N8IUN}4 package NetFox; ro4 XA1 import java.io.*; 3?GEXO&,E import java.net.*; -kd_gbnr3 |>P`Gl]E NI136P public class SiteFileFetch extends Thread { ~?n)1Vr| r$~
f[cA <ib#PLRM SiteInfoBean siteInfoBean = null; //文件信息Bean Ym*Ed[S long[] nStartPos; //开始位置 u%=M4|7 long[] nEndPos; //结束位置 rTjV/~ FileSplitterFetch[] fileSplitterFetch; //子线程对象 G#;$; long nFileLength; //文件长度 u;*Wc9>sU boolean bFirst = true; //是否第一次取文件 &Rx-zp&dJ boolean bStop = false; //停止标志 ISuye2tExq File tmpFile; //文件下载的临时信息 +9mnxU> DataOutputStream output; //输出到文件的输出流 OQON~&~ 85 tQHm6j //负责整个文件的抓取,控制内部线程(FileSplitterFetch类)
D=nuK25 public SiteFileFetch(SiteInfoBean bean) throws IOException 'WG%O7s. { 4X2/n siteInfoBean = bean; ~Xg@,?Zr //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Yg6 f tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); g2WDa'{L if(tmpFile.exists ()) ggUJ -M'2h { VL/%D* bFirst = false; 0g@
8x_3 read_nPos(); 4W9#z~' } "7pd(p *C else #Xc6bA& { 'i|z>si[* nStartPos = new long[bean.getNSplitter()]; iVt*N$iZ nEndPos = new long[bean.getNSplitter()]; 7usf^g[dh } +SSF=]4+ }pa@qZXh tF<|Eja* q|.
X[~e| } e8@@Pi<sB h@"dpmpe 6*/o public void run() do9@6[{Sv { {%5tqF //获得文件长度 Fss7xP' //分割文件 u"\HBbBx //实例FileSplitterFetch S/|'ggC //启动FileSplitterFetch线程 +_HPZo //等待子线程返回
zF2GW try{ joh=0nk;D if(bFirst) HUtuU X { q*oUd/F8 nFileLength = getFileSize(); >g@;`l.Z# if(nFileLength == -1) \*s'S*~ { ~/6m|k System.err.println("File Length is not known!"); Yq.Cz:>b } 8#w}wGV* else if(nFileLength == -2) )}
y1 { eXI ^9uH System.err.println("File is not access!"); 2c.~cNx`q[ } /u
}AgIb else E3\O?+h# { A`4j=OF\ for(int i=0;i<nStartPos.length;i++) :mU,g|~55 { 9i8D_[ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Pgs^#(^> } O>zM(I+p for(int i=0;i<nEndPos.length-1;i++) 95,y@~*] { >`a)gky%~ nEndPos = nStartPos[i+1]; 2bS)|#v<_t } fo$iV;x` nEndPos[nEndPos.length-1] = nFileLength; ,o}!pQ } 8 Vj]whE } h*f= @O<kjR<b xr)Rx{)3h //启动子线程 K4i#:7r'b fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zlmb_akJ for(int i=0;i<nStartPos.length;i++) 2yhtJ9/ { >WMH.5p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kE tYuf^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |*0oz= nStartPos,nEndPos,i); 5rqjqfFa Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yG5T;O& fileSplitterFetch.start(); ~l%Dcp } t+k"$zR // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #~54t0|Cd> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); s%Q
pb{ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^IuHc_ nEndPos = " + nFileLength); xNTO59Y-s // fileSplitterFetch[nPos.length-1].start(); \eE0Rnaf- 2+Z2`k]AC M=$y_9# //等待子线程结束 Cd.pMoS //int count = 0; O^I~d{M 5I //是否结束while循环 :<w3.(Z boolean breakWhile = false; inavi5. v6
DN:!& Rx*T7*xg{ while(!bStop) LMWcF'l { 9}Tf9>qP>M write_nPos(); kDJ5x8Q# Utility.sleep(500); t$8f:*6(* breakWhile = true; HHD4#XcU '+NmHu:q K3&v6 #] for(int i=0;i<nStartPos.length;i++) VY$hg { m,v"N%k, if(!fileSplitterFetch.bDownOver) G6xdGUM { EN()dCQHr breakWhile = false; eP-q[U?$n break; -c!{';Zn } Y'-BKZv! } ^:K"Tv.= if(breakWhile) Z mF}pa,gd break; ="RDcf/ WS@b3zzN i)P.Omr //count++; Deq~" //if(count>4) A?q[C4-BO, // siteStop(); A0yRA+ } u#?K/sU vV-ATIf
^ 3@?#4]D{' System.err.println("文件下载结束!"); Ob?>zsx } Y:]~~-f\~ catch(Exception e){e.printStackTrace ();} I@a7AuOw } ZPn`.Qc ]v@#3,BV q(e&{pbM) //获得文件长度 C<2vuZD public long getFileSize() |x2>F
{ 0]{h,W3]@[ int nFileLength = -1; @"-<m|lM try{ a_m P$4T URL url = new URL(siteInfoBean.getSSiteURL()); FZz\zp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |uQJMf[L) httpConnection.setRequestProperty("User-Agent","NetFox"); -*k%'Gr #Oz<<G< g/W<;o<v(I int responseCode=httpConnection.getResponseCode(); s<|.vVi" if(responseCode>=400) O82T| 0uw { eCMcr !. processErrorCode(responseCode); ?UoA'~= return -2; //-2 represent access is error 1?`,h6d*= } /}r%DND' \y{Bnp5h s%>>E!Qi_ String sHeader; T.GY :^71,An >E *f$mSI= for(int i=1;;i++) b{s_cOr/ { P*T'R //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Q1IN@Db}y //Utility.log(in.readLine()); z)=D&\HX sHeader=httpConnection.getHeaderFieldKey(i); /OK.n3Tt if(sHeader!=null) R:x4j#( { (ta!4h, if(sHeader.equals("Content-Length")) `&b8wF { V"*|`z) nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1[C,*\X8v break; j./3 ) } ~K 8eRT } .JZoZ.FAb else 3_B .W break; n`? j.
s } sAfSI<L_ } l.\Fr+*ej catch(IOException e){e.printStackTrace ();} Cq?l> catch(Exception e){e.printStackTrace ();} wy<m&M<Gr
pMYEL %YM4x!6 Utility.log(nFileLength); w#U3h]>, /_l%Dm? :Sk0?WU return nFileLength; muo(bR8 } bdk"7N m.EI("n"J Gn#5zx#l //保存下载信息(文件指针位置) 5Az=)q4Q private void write_nPos() 7gfNe kr~W { q-eC=!#} try{ a9mLPP output = new DataOutputStream(new FileOutputStream(tmpFile)); &Hb6 output.writeInt(nStartPos.length); NZ/gp"D? for(int i=0;i<nStartPos.length;i++) YTpSR~!Rj { G$}\~dD // output.writeLong(nPos); DGj:qd( output.writeLong(fileSplitterFetch.nStartPos); _W/s=pCh output.writeLong(fileSplitterFetch.nEndPos); fySzZ } hf^, output.close(); Y[i> } m,,-rC catch(IOException e){e.printStackTrace ();} |3/=dG catch(Exception e){e.printStackTrace ();}
YH&`+ + } .slA} z*>"I SN(:\|f
2 //读取保存的下载信息(文件指针位置) )9 5&-Hs private void read_nPos() {'E%SIRZ) { 1T!b#x4 try{ "n,"> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xmb]L:4F int nCount = input.readInt(); eZIqyw nStartPos = new long[nCount]; "yXKu)_ nEndPos = new long[nCount]; ^](sCE7 for(int i=0;i<nStartPos.length;i++) Zk__CgS# { n'9Wl'
nStartPos = input.readLong(); d^mw&F)S nEndPos = input.readLong(); / @X! } GL_YT.(! input.close(); B^P)(Nu+ } UX;?~X catch(IOException e){e.printStackTrace ();} VUxuX5B3M catch(Exception e){e.printStackTrace ();} Xa=oryDt } tq H7M0Ry 8{#WF# NE,2jeZQ . private void processErrorCode(int nErrorCode) <iuESeDG { #wK { G)J System.err.println("Error Code : " + nErrorCode); vP`Sz}FU } ST5L
O#5 5,})x]'x Fm_^7| //停止文件下载 u\ro9l public void siteStop() G|Rsj{2' { a\
fG)Fqp bStop = true; C$(US8:{ for(int i=0;i<nStartPos.length;i++) #3>o^cN~8k fileSplitterFetch.splitterStop(); KV9'ew+M , 7KP F&%@p& } ztTj2M" }
]W~\%`#8? //负责部分文件的抓取 :JH#*5%gQ: **FileSplitterFetch.java de1cl< */ Ckd@| package NetFox; 7DDd1"jE ?;zu>4f| ~7+7{9g import java.io.*; GPz0qK import java.net.*; _v bCC7Bf8 Y<-h#_ FeoI+KA public class FileSplitterFetch extends Thread { c[J?`8 OB`(,m# 0uV3J String sURL; //File URL ^ gMoW long nStartPos; //File Snippet Start Position #%O|P&rA
long nEndPos; //File Snippet End Position h/ 5|3 int nThreadID; //Thread's ID Z<L}ur boolean bDownOver = false; //Downing is over `-fWNHs boolean bStop = false; //Stop identical Y[)b".K FileAccessI fileAccessI = null; //File Access interface [~*5uSG 1AQVj]#S fI"sdzu^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k>E^FB= { fb-Lp#!T39 this.sURL = sURL; q;Tdqv!Ju this.nStartPos = nStart; WD#
96V this.nEndPos = nEnd; + Ac.@!X}% nThreadID = id; ~k\Dde fileAccessI = new FileAccessI(sName,nStartPos);//定位 }A jE- K{ } vz5x{W vF@hg)A Q,R>dkS public void run() (VDY]Q) { SW5V:|/ while(nStartPos < nEndPos && !bStop) NIgqdEu1 { 2t 6m# DmU,}]#: >RJjm&M try{ 7irpD7P>
URL url = new URL(sURL); -fpe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H3-(.l[!b) httpConnection.setRequestProperty("User-Agent","NetFox"); -]el_:H String sProperty = "bytes="+nStartPos+"-"; E|{(O httpConnection.setRequestProperty("RANGE",sProperty); %"-bG'Yc Utility.log(sProperty); <G|i!Pm j5m KJC !q\MXS($#u InputStream input = httpConnection.getInputStream(); ]QKo>7%[ //logResponseHead(httpConnection); p3r("\Za, GsIVx! 6_|iXs(& byte[] b = new byte[1024]; z^lcc7 int nRead; `#HtVI while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +t*V7nW { j9gn7LS nStartPos += fileAccessI.write(b,0,nRead); i(T[ //if(nThreadID == 1) `-t8ag3 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <*JFY%y" } F+o4f3N r1<dZtb i>z_6Gax*[ Utility.log("Thread " + nThreadID + " is over!"); Kb X&E0 bDownOver = true; -t]3 gCLb //nPos = fileAccessI.write (b,0,nRead); m`i_O0T } 88Nx/:#Y* catch(Exception e){e.printStackTrace ();} @)#EZQi x } 5aj%<r } .~$!BWP )
>;7"v
I~T //打印回应的头信息 IiU\}<O public void logResponseHead(HttpURLConnection con) EfX\" y { e!W U for(int i=1;;i++) "C0?s7Y { wZ4w`|' String header=con.getHeaderFieldKey(i); WwsH7X) if(header!=null) >$$z 6A[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9?X8H1 Utility.log(header+" : "+con.getHeaderField(header)); FKZ'6KM&A else yPrF2@#XZ/ break; 9xi nX-x;n } J':X$>E| } r[?GO"ej5 K;z$~;F _(zZrUHB public void splitterStop() YMN=1Zuj? { fj|b;8_}l bStop = true; uMx6: } ?(Se$iTZ OZc4 -5 }y%c. } 8)lrQvZ apOXcZ xKR\w!+Z' /* arIEd VfNa **FileAccess.java Um}f7^fp^l *//文件访问(定位,写) e Fh7#~m package NetFox; 6Hbu7r*tm import java.io.*; g,9&@g/ 3
,zW6 -} 4#CHX^De public class FileAccessI implements Serializable{ "(r%`.l=I y2W|,=Vd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 VwudNjL RandomAccessFile oSavedFile; 5?MaKNm } long nPos; T;G<62`.h wz'= xa.tH)R public FileAccessI() throws IOException Ul_5"3ze { #M%K82" this("",0); TZ63=m } JM1O7I bwM?DY ]]0Yh public FileAccessI(String sName,long nPos) throws IOException PYBE?td { Fc#Sn2p* oSavedFile = new RandomAccessFile(sName,"rw"); A XhP3B] this.nPos = nPos; @9eN\b%I^H oSavedFile.seek(nPos); N4#D&5I", } Ngj&1Ta&[ yR?./M! fy]c=:EmD public synchronized int write(byte[] b,int nStart,int nLen) UX+vU@Co[ { $xT9e int n = -1; `OfD^Q= try{ SJ91(K oSavedFile.write(b,nStart,nLen); Q^;:Kl.b n = nLen; ua"2nVxK_K } s+~GQcj<T catch(IOException e) )=#e*1!b { LSo*JO6 e.printStackTrace (); tLi91)oG } g<@Q)p*ow ),CKuq> ? cXW\A( return n; pdB\D } I_5/e>9 U
shIQh s7afj t } 76bMy4re hxzA1s%~ CuD}Uo+u /* /vq$/ **SiteInfoBean.java 9dw*
++ */ X;H\u6-|>6 package NetFox; "={* 0P F^$;hMh% n$N$OFuO public class SiteInfoBean { {nXygg
J }K8e(i6z LPBa!fq private String sSiteURL; //Site's URL Ui!l3_O private String sFilePath; //Saved File's Path d)S`.Q private String sFileName; //Saved File's Name 5JhvYsf3_ private int nSplitter; //Count of Splited Downloading File !ej]'>V,X O2\(:tvw ~Th,<w*o public SiteInfoBean() mogmr {//nSplitter的缺省值为5 lP*n%Pn) //default value of nSplitter is 5 e'>q( B this("","","",5); :_y!p } N2k<W?wQ .dMdb7 6_<~]W& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;@T0wd_i| { DI8<0.L sSiteURL= sURL; `3i<jZMG sFilePath = sPath; PxgJ7d sFileName = sName; a_+?#m this.nSplitter = nSpiltter; ]+46r!r| y+T[="W 9@ YKx0 } zBlv?JwG Cdib{y<ji L-}J=n\ public String getSSiteURL() (M"rpG>L { ~5`oNa return sSiteURL; 5?F5xiW } t[J=8rhER e*qGrg (E M,S'4Szuk public void setSSiteURL(String value) $%q=tn'EX { nX 9]dz sSiteURL = value; HO['o{>BL } hO&b\#@~ CxeW5qc :^WF%X public String getSFilePath() G~o!u8^; { 71\53Qr#U return sFilePath; 3ZI7;Gw } &}[P{53sr C6[W/,eS &n
)MGg1% public void setSFilePath(String value) &:g:7l]g { (z>t 4(%\ sFilePath = value; i?Pnyi } ^l|b>z"0ao C= V2Y_j 1Vdi5;dn public String getSFileName() F'b%D { y7M{L8{0 return sFileName; z,4mg6gt } '{UKO7 ] re=8s6 T"[]'|' public void setSFileName(String value) $GFR7YC 7 { fE+zA)KX sFileName = value; 7n6g;8xE } z,G_&5|f% hp)^s7H Cl`i|cF\ public int getNSplitter() _yv#v_Z { c%C6d97q return nSplitter; .Zczya } RC/ 3\' 4_kN';a4Q tLWw<)t public void setNSplitter(int nCount) Bj1%}B { R
,qQC< nSplitter = nCount; ];LFv5" } GeTk/tU } nFNRiDx #dj?^n g uy's eJ /* )rK2%\Z **Utility.java \~ChbPnc */ s:}? rSI package NetFox; 'ZW(Hjrd }I&.xzJ ZrTB% public class Utility { X+aQ 7^"s GYx0U8MJ[e Q2VF+g, public Utility() m4 (pMrJ { n?.; *: W~/d2_|/ CpO_p%P } aX^T[ mkn1LzE|F //线程睡眠 j 4?Qd0z public static void sleep(int nSecond) Bz/Vzc( { yx5e try{ &.,K@OFE} Thread.sleep(nSecond); zHb[.ry~ } t1adS:)s catch(Exception e) e4tIO { MqnUym e.printStackTrace (); fz=?QEG } {siOa%;* } G kjfDY: e{5?+6KH //日志 +7H)s public static void log(String sMsg) qh~bX
i! { 1IA1; System.err.println(sMsg); ?eIb7O } vd4@ jZ5 ,Y/B49 AU$~Ap*rsa public static void log(int sMsg) [yXmnrxA { f1MRmp-f' System.err.println(sMsg); TVD~Ix } sllT1%? } "l56?@- x 'dwT&v]@ -I|xW /* 0N,<v7PX **TestMethod.java s1D<R,J|H */ = {O ~ package NetFox; :Z//
vmqa_gU\
@'R)$:I%L public class TestMethod { {Yj5Mj|# OoSk^U) &u.{]Yjx public TestMethod() \)6glAtN { ///xx/weblogic60b2_win.exe x%}D+2ro-t try{ 8}B SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); W%!(kN&d //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8wsU`40=Q SiteFileFetch fileFetch = new SiteFileFetch(bean); 0>sa{Z fileFetch.start(); 9GD0jJEu } {cm?Q\DT catch(Exception e){e.printStackTrace ();} _RbfyyaN =X4Fn^w"4O fCr2'+O"b } t1FtYXv`/ e xb}
y 86r"hy~ public static void main(String[] args) LTWkHyx { V)^Xz8H_ new TestMethod(); ,MCTb '=G } +`HMl;0m } E=s,- 点击下载更多相关资料
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