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/* Xji<oih **SiteFileFetch.java u m,Zt */ :Fu.S1j$ package NetFox; 3lQGU import java.io.*; !bRoNP import java.net.*; i#=s_v8 d%8hWlffz [O7:<co public class SiteFileFetch extends Thread { >Ta|#]{ gWL'Fl}H G?v]p~6 SiteInfoBean siteInfoBean = null; //文件信息Bean dJ#mk5=
" long[] nStartPos; //开始位置 ncjtv"2R long[] nEndPos; //结束位置 AQ7w5}g+V FileSplitterFetch[] fileSplitterFetch; //子线程对象 t&*X~(Yb! long nFileLength; //文件长度 K`Vi5hR~c boolean bFirst = true; //是否第一次取文件 <#k(g\/R boolean bStop = false; //停止标志 h0_od/D1r File tmpFile; //文件下载的临时信息 N D`?T
&PK DataOutputStream output; //输出到文件的输出流 1<IF@__ 76Ho\}-U"> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) xJlf}LEyF public SiteFileFetch(SiteInfoBean bean) throws IOException Q+YYj { K*NCIIDh siteInfoBean = bean; +`'=K ;{U //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gE;r;#Jt4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cdY|z]B if(tmpFile.exists ()) Y)lYEhF { V $Y=JK@ bFirst = false; ]6#bp, read_nPos(); 41dB4Td5t } 1g<jr. else V'alzw7# { xL&M8: nStartPos = new long[bean.getNSplitter()]; m?*}yM nEndPos = new long[bean.getNSplitter()]; \%[sv@P9s } Pk)>@F< #$-{hg{ g4z*6L,u 5\S
s`#g } GP<PU [C@|qAh pg0Sq9qCN public void run() X3mHg5zt { xfegi$ //获得文件长度 we?#
Dui //分割文件 '/O >#1 //实例FileSplitterFetch Fw.df< //启动FileSplitterFetch线程 7H=V|Btnc //等待子线程返回 X?f\j"v try{ !pTi.3 if(bFirst) b;xn0sDn# { +V
Oczl= nFileLength = getFileSize(); ?2q4dx0 if(nFileLength == -1) -HQ(t { 4 x|yzUx System.err.println("File Length is not known!"); fmgXh)= } G1tua"Px else if(nFileLength == -2) u7(<YSOs { X^o0t^
System.err.println("File is not access!"); 0Ba*"/U]t~ } O
n/q&h5 else xu<oQBt { (baBi9<P= for(int i=0;i<nStartPos.length;i++) (ay((|) { 4"^v]&I nStartPos = (long)(i*(nFileLength/nStartPos.length)); 6N<
snBmd } .(g"(fgF for(int i=0;i<nEndPos.length-1;i++) )i/x%^ca$ { <rI8O;\H nEndPos = nStartPos[i+1]; -^ceTzW+ } /<
-+*79G nEndPos[nEndPos.length-1] = nFileLength; c9O0YQ3&8 } s:zz8oN } Um%$TGw5 R1?LB"aN 1| XC$0 //启动子线程 AFdBf6/"i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Vw";< <0HZ for(int i=0;i<nStartPos.length;i++) |V-)3#c { Uys[0n fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l1UN.l'p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), '*=kt nStartPos,nEndPos,i); wOV}<.W Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L %20tm fileSplitterFetch.start(); UFPSQ } ItxC}qT // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AGMrBd|J{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); z8JdA%YBM // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Qm@v}pD nEndPos = " + nFileLength); U2CCjAgRs // fileSplitterFetch[nPos.length-1].start(); fI }v}L^ eh /QFm
4 o2_mcJ //等待子线程结束 m\eYm;RVj //int count = 0; -F&*>?I //是否结束while循环 ' Ivr =- boolean breakWhile = false; mw flx8 wvz_)bN~A 7-j=he/ while(!bStop) ,}23 { h
e1= write_nPos(); ss'`[QhR2 Utility.sleep(500); S*' breakWhile = true; j-(k`w\ VQ/Jz5^ 8dCa@r&tz for(int i=0;i<nStartPos.length;i++) k|;[)gE { HOb0\X if(!fileSplitterFetch.bDownOver) 9 #)& { gaVQ3NqF breakWhile = false; @ $2xiE.[ break; w6G<&1iH } 'w`3( ':= } +&qj`hA-b if(breakWhile) U( (F< break; |n*<H| >*e,+ok ,%U'>F? //count++; a[A*9%a //if(count>4) 3fhlMOm // siteStop(); 0})mCVBY } rF)[ Sed:T cRS2v--\- t`eUD>\ System.err.println("文件下载结束!"); E;Q
,{{# } ctT6va catch(Exception e){e.printStackTrace ();} qcR"i+b } +5oK91o[y vj4n=F,Z jLCZ
JSK //获得文件长度 {n-6e[ public long getFileSize() p}9bZKyf { 6U[bAp int nFileLength = -1; " twq#Alx try{ > ?<C+ZHh URL url = new URL(siteInfoBean.getSSiteURL()); az;o7[rI^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yp\sJc` httpConnection.setRequestProperty("User-Agent","NetFox"); e sDd>W 5@< D6>6 ZhYOz int responseCode=httpConnection.getResponseCode(); !/wR[`s9w if(responseCode>=400) J)"g`)\2 + { TYN~c( processErrorCode(responseCode); mQqv{1 return -2; //-2 represent access is error :Miri_l } eZk4$y 3+d_5l;m) -9> oB String sHeader; cgF?[Z+x (OT&:WwW 1GI/gc\ for(int i=1;;i++) U6
$)e.FO { X0e#w? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5*IfI+} //Utility.log(in.readLine()); ,+hH|$ sHeader=httpConnection.getHeaderFieldKey(i); CF_pIfbaf if(sHeader!=null) 'v:%} qMv { Z+]Uw if(sHeader.equals("Content-Length")) +ew9%={zB { L2
^-t7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); XLxr@1 break; ~T'Ri= } R0_O/o+{ } R1lC_G] else !i77v,
(#| break; ]v,>!~8r } 2!E@Gbhm5 } FEzjP$ catch(IOException e){e.printStackTrace ();} AHl1{*
[ catch(Exception e){e.printStackTrace ();} hA!kkNqV %?WR9}KU0 $bd2TVNV: Utility.log(nFileLength); !=yNj6_f (@"5:M xhmrep6+< return nFileLength; 67{>x[ } AQ`
`Dp Fo@cz"% H 6~6hg //保存下载信息(文件指针位置) i9Tq h private void write_nPos() Vim*4^[#L { W{z{AxS try{ wSwDhOX= output = new DataOutputStream(new FileOutputStream(tmpFile)); CW9vC output.writeInt(nStartPos.length); )%T<Mw2u for(int i=0;i<nStartPos.length;i++) s%c>Ge { eG05} // output.writeLong(nPos); cEc_S42Z output.writeLong(fileSplitterFetch.nStartPos); ;ZVT[gi* output.writeLong(fileSplitterFetch.nEndPos); !CO1I-yL } GL<u#[ output.close(); |1[3RnGS } . \6q\7Ej catch(IOException e){e.printStackTrace ();}
+91j 1? catch(Exception e){e.printStackTrace ();} <*'%Xgm } HZDeQx`*s _>k&M7OU4 !/;/ X\d //读取保存的下载信息(文件指针位置) 2/ES.>K!. private void read_nPos() uz%<K(:Ov { ZD(VH6<g% try{ b2<((H DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); , A@uSfC( int nCount = input.readInt(); B2/d%B nStartPos = new long[nCount]; a(Fx1`} nEndPos = new long[nCount]; <jwQ&fm)/R for(int i=0;i<nStartPos.length;i++) Jdc{H/10 { xxS>O% nStartPos = input.readLong(); <Mq vGXI nEndPos = input.readLong(); N3rq8Rk } suF<VJ)&s input.close(); G3wkqd } "z6xS; catch(IOException e){e.printStackTrace ();} K}j["p<! catch(Exception e){e.printStackTrace ();} j2GTo~muq } fb*h.6^y9 2.>aL BJNZH# " private void processErrorCode(int nErrorCode) =Sp+$:q* { 9(AY7]6 System.err.println("Error Code : " + nErrorCode); e\7AtlW" } # X`t~Y' 5"WI^"6b: qvs&*lBY //停止文件下载 9
7U a, public void siteStop() =v:}{~M^$ { \'9(zb vz9 bStop = true; j' }4ZwEh
for(int i=0;i<nStartPos.length;i++) `37%|e 3bQ fileSplitterFetch.splitterStop(); 7zcmv"` ZTg[}+0e 8c3/n } e,DRQ2AU } O/b1^
Y
//负责部分文件的抓取 3\2^LILLO **FileSplitterFetch.java 1/tyne=m */ K0'= O package NetFox; 9'Cu9nR %$6?em_ #DA ,* import java.io.*; ZE[NQ8 import java.net.*; &ev#C%Nu %%+@s 9 Eqv^0u public class FileSplitterFetch extends Thread { %{B4M#~ U7xKu75G1 f7?u`"C String sURL; //File URL =J0r,dR long nStartPos; //File Snippet Start Position :qvA'.L/;z long nEndPos; //File Snippet End Position 4Dw|
I${O int nThreadID; //Thread's ID UWW'[gEP1 boolean bDownOver = false; //Downing is over _+ERX[i boolean bStop = false; //Stop identical x }.&?m FileAccessI fileAccessI = null; //File Access interface ,Yu2K`
MZ%S3' S76xEL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Z5`U+ ( { xA>3]<O this.sURL = sURL; <Q@{6 this.nStartPos = nStart; ;]VLA9dC this.nEndPos = nEnd; M!Ywjvw*)3 nThreadID = id; $]~|W3\G fileAccessI = new FileAccessI(sName,nStartPos);//定位 )(h<vo)-zX } ,!bcm SN5Z@kK BYZllwxwTE public void run() 98I m/v { fiQ/ &]|5 while(nStartPos < nEndPos && !bStop) v%)=!T, { ',s{N9 ZW ZKy JQ uWkuw5; try{ ,ik\MSS URL url = new URL(sURL); F>ps&h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DG/<#SCF httpConnection.setRequestProperty("User-Agent","NetFox"); jF6[+bW< String sProperty = "bytes="+nStartPos+"-"; xz){RkVzP httpConnection.setRequestProperty("RANGE",sProperty); X({R+ Utility.log(sProperty); }b/G{92 ;|.IUXEgcF @\Yu?_a InputStream input = httpConnection.getInputStream(); XB+Juk&d //logResponseHead(httpConnection); Jm3iYR+, y2@8? Ombvp; byte[] b = new byte[1024]; {3G2-$yb int nRead; }O8#4-E_Ji while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) o%l|16DR { ^w~Utx4 nStartPos += fileAccessI.write(b,0,nRead); k2DBm q; //if(nThreadID == 1) 4Dv42fO // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ILT.yxV } 5uD'Kd$H 3k* U/* FQw@@ Utility.log("Thread " + nThreadID + " is over!"); \"Aw
ATQ bDownOver = true; 3t$)saQR //nPos = fileAccessI.write (b,0,nRead); YCu9dBeVS } (\ Gs7 catch(Exception e){e.printStackTrace ();} ^vr`t9EE } -MItZ } ~MW_=6U Jtl[9qe#] 8\rHSsP //打印回应的头信息 pu5-=QN public void logResponseHead(HttpURLConnection con) S@eI3PkE { z=a{;1A for(int i=1;;i++) 2w67>w\ { ?iaD;:'qE String header=con.getHeaderFieldKey(i); S1W(]%0/ if(header!=null) -{a&Zkz>V //responseHeaders.put(header,httpConnection.getHeaderField(header)); v`9n'+h-c6 Utility.log(header+" : "+con.getHeaderField(header)); <rFKJ^ B else r?wE ;gH break; -,}ppTG } 'E~[I"0 } a[Oi X5wYfN 9 e0Oj3!B public void splitterStop() ompkDl\E { 2B&|0&WI bStop = true; s(M8 Y } x)!NB99(tC s9b 6l,Z ypsT:uLT } #ZPy&GIr or..e \k)(:[^FY /* |csR"DOqz **FileAccess.java mdPEF)- *//文件访问(定位,写) PV/SzfvIq package NetFox; Mwd(?o import java.io.*; 1U< g m\?H
<o0
QKtTy>5 public class FileAccessI implements Serializable{ k-a3oLCR, ,1&</R_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 d}RR!i`<N RandomAccessFile oSavedFile; 4]3(Vyh` long nPos; 63n<4VSH Vpsv@\@J> pt+[BF 6P public FileAccessI() throws IOException "8h7"WR { 2q,> *B? this("",0); #iAEcC0k5 } Wf>scl`s h$~\to$C ?\NWKp public FileAccessI(String sName,long nPos) throws IOException #Jqa_$\. { ]:vo"{*C oSavedFile = new RandomAccessFile(sName,"rw"); 'vUx4s this.nPos = nPos; x-HN]quhe oSavedFile.seek(nPos); \%+5p"Z< }
uRfFPOYH dy^ zOqc BR [3i}Ud public synchronized int write(byte[] b,int nStart,int nLen) c})f&Z@< { wA;Cj int n = -1; Kt3]r:&J try{ 9k[>(LC oSavedFile.write(b,nStart,nLen); wc#E:GJcK n = nLen; X,"(G}KUA } mIX[HDy:V$ catch(IOException e) Xv'5%o^i* { .#[== e.printStackTrace (); K6l{wyMb| } ~t-!{F Vy7o}z` j"c30AY return n; @?r[
$Ea1M } N\9Wxz$ <|MF\D' QZs ]'*=# } a{FCg%vD) =~f\m:Y }hy,
}2(8 /* F6\Hqv **SiteInfoBean.java QFtf.")[.
*/ <4|/AF*> package NetFox; mWPA]g( l@OY8z-_ wfXm(RYM public class SiteInfoBean {
nW*D E 'O[E= zZax![Z private String sSiteURL; //Site's URL bYKe5y= private String sFilePath; //Saved File's Path n$oHr private String sFileName; //Saved File's Name 9Oe~e private int nSplitter; //Count of Splited Downloading File q/lQEfR ?' :v):J} awic9uMH public SiteInfoBean() jJK`+J,i}X {//nSplitter的缺省值为5 Q'B2!9=LB //default value of nSplitter is 5 %P2l@}?a this("","","",5); =
olmBXn/ } yxx'g+D* iir]M`A.- <_N<L\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) tr t^o { e
1$<,.> sSiteURL= sURL; aF41?.s sFilePath = sPath; @z-%:J/$ sFileName = sName; ^L@2%}6b` this.nSplitter = nSpiltter; e: aa d~F4 .*(xkJI3 } %H AforH /5$;W'I vk&6L%_~a public String getSSiteURL() ^I CSs]}1 { +'VSD`BR return sSiteURL; Ey#7L
M) } !\6<kQg# %A^V@0K3 15X.gx public void setSSiteURL(String value) NlG~{rfI { ~]_U!r[FA sSiteURL = value; Ump$N# } gZHuyp(B %Y:"5fH 0Kytg\p} public String getSFilePath() lIUaGz| { 2]}4)_&d<e return sFilePath; s1GR!*z> } D02(6| G8t9Lx !w;oVPNg public void setSFilePath(String value) R0A|}Ee* { N7
FndB5% sFilePath = value; ]~K&b96( } ~EL3I
MOia]5 rijavZS6 public String getSFileName() V*<`!w { fFYfb4o return sFileName; "!w#E6gU } e"D%eFkDW N|@jHxy o^ zrF public void setSFileName(String value) J6[V7R[\ { {KGEv% sFileName = value; tSVWO]< } [Xyu_I-c U5RLM_a@M >_J9D?3S public int getNSplitter() SIridZ*% { $Vp*,oRL return nSplitter; 90[6PSXk } [2$mo;E? ?` lD|~ \5iMr[s public void setNSplitter(int nCount) B{ A b# { [p+-]V nSplitter = nCount; 9,wD } 4^Y{ BS fF } 7M/v[dwL m!K`?P]:N M
'#a.z% /* T T@U_^o **Utility.java _1,hO?TK */ +6`+Q2qi package NetFox; fg)VO6Wo& PS}'LhZ HSk_'g(\0 public class Utility { x fa- 4`GOBX1b.y ~NMx:PP public Utility() )GYnQoV4 { 2{Y~jYt{h z?^oy. re~T,PPM } ZfMs6`Wv
1 Yu$QL@ //线程睡眠 `y|_hb public static void sleep(int nSecond) Uv m:`e~? { ZXIw^!8@/ try{ oo\7\b#Jx Thread.sleep(nSecond); X- ZZLl# } V,h}l" catch(Exception e) (^NYC$ZxM= { SK*z4p e.printStackTrace (); 3;RQ\{eM } o (k{Ed } VIHuo, F[v:&fle //日志 BW:HKH.k public static void log(String sMsg) )dd1B>ej] { lvsj4cT System.err.println(sMsg); !-t,r%CG } Vw|P;LLl` M#_|WL~ F8S>Ld public static void log(int sMsg) f{.4#C' { q{ [!" , System.err.println(sMsg); -VeCX] } xg}Q~,: } bksv2@ar ?I[*{}@n" :
eCeJ~&E /* Sv_Nb > **TestMethod.java o"6
2~ */ W,|+Dl package NetFox; -.Blj<2ah _%[po%] YF)]B |I public class TestMethod { mqj-/DN6* ~Pj q3etk \h"U+Bv7 public TestMethod() QC?~$>h!? { ///xx/weblogic60b2_win.exe w_f.\\1r try{ ]rv4O@||w SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %vv`Vx2 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Sx[
eX,q SiteFileFetch fileFetch = new SiteFileFetch(bean); P6&%`$ fileFetch.start(); egvb#:zW? } R
RE8|%p;B catch(Exception e){e.printStackTrace ();} Sbl = U n)~*BpL3 u0GHcpOm } `BQv;NtP Z\$M)e8n W6Mq:?+ D public static void main(String[] args) o@BV&| { D#AqZS>B new TestMethod(); Q~tXT_ } m8=n `XI } ?=ffv]v| 点击下载更多相关资料
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