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/* ;BjJ<?^{ **SiteFileFetch.java 0]MI*s>& */ Aj "SSX!L package NetFox; kYU!6t1 import java.io.*; TTm import java.net.*; D0@d}N ]R6Z(^XT,E vH/Y]Am public class SiteFileFetch extends Thread { O*-sSf ^=Egf?|[ :IX_}| SiteInfoBean siteInfoBean = null; //文件信息Bean cvO;xR long[] nStartPos; //开始位置 <G#z;]N long[] nEndPos; //结束位置 V|G[j\]E< FileSplitterFetch[] fileSplitterFetch; //子线程对象 6uubkt long nFileLength; //文件长度 gfmaO] boolean bFirst = true; //是否第一次取文件 b@yFqgJ_ boolean bStop = false; //停止标志 4!0nM|~ File tmpFile; //文件下载的临时信息 q.69<Rs DataOutputStream output; //输出到文件的输出流 ?&se]\ kq=tL@W`0} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ff<adl- public SiteFileFetch(SiteInfoBean bean) throws IOException O>sE~~g]? { Ll'!aar, siteInfoBean = bean; _~_6qTv-d //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); WDQw)EUl& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); iBPx97a if(tmpFile.exists ()) <]kifiN# { ?8aPd"x bFirst = false; jG~UyzWH; read_nPos(); u(P;) E"1 } rBovC else z{dn { Q5pm^X._j nStartPos = new long[bean.getNSplitter()]; jN^09T49 nEndPos = new long[bean.getNSplitter()]; ,Z p9,nf } :R9 DJh\ 8WRxM%gsH NzuH&o][ p:gM?2p1 } E!v^j=h$u ]#Q'~X W FAP1Bm public void run() Ax"I$6n> { h2#S ? //获得文件长度 t4CI +fqy //分割文件 PbN"+q M //实例FileSplitterFetch 7z4u?>pne* //启动FileSplitterFetch线程 6N]V.;0_5 //等待子线程返回 1[r; try{ x:WxEw>R if(bFirst) +jpC%o}C { 1q(o3% nFileLength = getFileSize(); y6!Zt}m if(nFileLength == -1) 0&|,HK { &+>)H$5 System.err.println("File Length is not known!"); xtP=/B/ } <6)
w else if(nFileLength == -2) jt8%
L[ { 8ncgTCH: System.err.println("File is not access!"); %l8nTcL_? } "7tEk<x else 7Vxe]s { {|Pz9a-: for(int i=0;i<nStartPos.length;i++) fG\]&LFBU { +
s snCr nStartPos = (long)(i*(nFileLength/nStartPos.length)); +: oD?h } lj o^ 2 for(int i=0;i<nEndPos.length-1;i++) sCF7K=a { xr\wOQ*` nEndPos = nStartPos[i+1]; @YfCS8
eH } Cq, hzi- nEndPos[nEndPos.length-1] = nFileLength; ^>f jURR } 7,N>u8cTh } C5jR|| )wwQv2E T c{]w?V //启动子线程 =2=n fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q9
*N/2+ for(int i=0;i<nStartPos.length;i++) :,^pL At { q$=EUB"C fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >@o}l:* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #Ua+P(1q nStartPos,nEndPos,i); ,lly=OhKb Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %wp#vO-$ fileSplitterFetch.start(); #815h,nP+ } @|^2 +K/ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \Ow-o0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); bUp
,vc* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?>p<!:E!r nEndPos = " + nFileLength); 2W=(
{e)$ // fileSplitterFetch[nPos.length-1].start(); VIxt;yE Sh_ =dzM (]mh}=:KDg //等待子线程结束 *0,?QS-a //int count = 0; =Xc[EUi<;g //是否结束while循环 )2P4EEs[ boolean breakWhile = false; 6QOdd6_d )A4WK+yD$z zaVDe9B,7 while(!bStop) 7gV"pa { `[;b#. write_nPos(); <k^P>Irb3t Utility.sleep(500); $MmCh&V breakWhile = true; .qioEqK8!y %#Vn?zr|~ Zbp ByRyN for(int i=0;i<nStartPos.length;i++) Q\~4J1 { [k9aY$baT^ if(!fileSplitterFetch.bDownOver) $z+iB;x { .FnO breakWhile = false; 1;l&ck-Gg/ break; ZL`G<Mo;. } A2b
C5lA } !t["pr\
? if(breakWhile) h
!~u9 break; O]n"aAu@ qYW{$K }V3p < //count++; Qj? G KO //if(count>4) 4><b3r;T' // siteStop(); )CzWq}: } In0kP" 6?0^U 9 K'%,dn System.err.println("文件下载结束!"); ~7!J/LHg } %3i/PIN catch(Exception e){e.printStackTrace ();} =De%]]> } g]V}azLr 1@Bq-2OD4 FhZ&^.: //获得文件长度 ~4wbIE_rN public long getFileSize() ;C%D+"l1g { hgE!)UE int nFileLength = -1; 1WPDMLuN try{ :XMw="u= URL url = new URL(siteInfoBean.getSSiteURL()); <v"C`cga HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wx&AY"J
httpConnection.setRequestProperty("User-Agent","NetFox"); p1HU2APFP 1V?}";T 'f<0&Ci8 int responseCode=httpConnection.getResponseCode(); 8 F'i5i if(responseCode>=400) Hi{c[; { J!
>HT'M processErrorCode(responseCode); )}?'1ciHI return -2; //-2 represent access is error ^6 +P&MxM } MjG=6.J|` Y$EqBN RC8{QgaI String sHeader; 2|o6~m<pE Um\Nd#=: GljxYH"]# for(int i=1;;i++) 0K,*FdA { 0z."6r //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); JW&/l //Utility.log(in.readLine()); >.PLD} zE_ sHeader=httpConnection.getHeaderFieldKey(i); Q/iaxY# if(sHeader!=null) mqk~Pno|< { b^PYA_k-Xn if(sHeader.equals("Content-Length")) uj&^W[s { A$W,#`E nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !a3cEzs3 break; ]}F_nc2L } Tn/
3`j
{ } K3?7Hndf2 else QQ97BP7W break; > K,Q`sS } E'$r#k:o } #HB]qa catch(IOException e){e.printStackTrace ();} !l_1r$ catch(Exception e){e.printStackTrace ();} A75IG4] Y-n*K' GS~jNZx Utility.log(nFileLength); %Md;=,a:6 Cdiu*#f 5_M9 T3 return nFileLength; CIQo2~G } Hw<t>z
k br<,? ?YX2CJ6N //保存下载信息(文件指针位置) g!D?Yj4 private void write_nPos() Bfaj4i;_ { zp"sM
z] try{ kwK<?\D output = new DataOutputStream(new FileOutputStream(tmpFile)); %|o4 U0c output.writeInt(nStartPos.length); *gu~7&yoP for(int i=0;i<nStartPos.length;i++) L]kSj$A { `#2}[D // output.writeLong(nPos);
F[115/ output.writeLong(fileSplitterFetch.nStartPos); ;hmy7M1% output.writeLong(fileSplitterFetch.nEndPos); fT/;TK>z> } 2M=
gpy output.close(); _7]* 5Pxo } j*g5f catch(IOException e){e.printStackTrace ();} WU{G_Fqaz catch(Exception e){e.printStackTrace ();} sBq @W4 } qJVW :$1q xc8MOm F^&_O*" //读取保存的下载信息(文件指针位置) .!,T>:R private void read_nPos() #=5/D@ { \Q?r+VZ try{ ~0|Hw.OK DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ,#UaWq@7 int nCount = input.readInt(); Tw`^ nStartPos = new long[nCount]; JpxJZJ nEndPos = new long[nCount]; hPx=3L$ for(int i=0;i<nStartPos.length;i++) : UD<1fh { sk$MJSE
~ nStartPos = input.readLong(); yFshV\ nEndPos = input.readLong(); 1'R]An BV } P$N\o @
input.close(); RXb+"/ } %IW=[D6Tg catch(IOException e){e.printStackTrace ();} &voyEvX/S catch(Exception e){e.printStackTrace ();} wvcG <sj } ; @-7'%(C 2ME3= C #)hM]=,e private void processErrorCode(int nErrorCode) |JSj<~1ki { L/"XIMI*Xg System.err.println("Error Code : " + nErrorCode); ; a XcGa } >"{3lDyq- Qy*`s !CTchk<{( //停止文件下载 I/<aY*R4 public void siteStop() w8kp6_i' { 5K;jW bStop = true; |jk"; h for(int i=0;i<nStartPos.length;i++) Aj;Z
& fileSplitterFetch.splitterStop();
7pMrYIP \eT0d< 1xar
L)) } 0j7W\'!t } ~M3`mO+^U //负责部分文件的抓取 #O/ihRoaO **FileSplitterFetch.java -{>JF */ *@S:f"i package NetFox; "e0$/WQ6J OySIp[{tJ QnME|j\ import java.io.*; /=*h\8c~ import java.net.*; t)=u}t$ H? Z5ex 6FiI\ public class FileSplitterFetch extends Thread { !0CC &8C`
#pErGz'{ `6)GjZh^ String sURL; //File URL 0+}42g|_ Z long nStartPos; //File Snippet Start Position Cz-eiPlq long nEndPos; //File Snippet End Position x?9rT 0D int nThreadID; //Thread's ID <3m_}
=\ boolean bDownOver = false; //Downing is over M^AwOR7< boolean bStop = false; //Stop identical 3E$M{l FileAccessI fileAccessI = null; //File Access interface %(MaH 6.ASLH3# casva; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException PB_+:S^8 { B<u6Z!Pp2 this.sURL = sURL; *8M0h9S$ this.nStartPos = nStart; <kN4@bd; this.nEndPos = nEnd; / Of*II& nThreadID = id; [`BMi-WQ fileAccessI = new FileAccessI(sName,nStartPos);//定位 +)h *) } __fa,kK {? )q8w+'z J cL4q\g public void run() :3pJGMv( { 5 >S#ew while(nStartPos < nEndPos && !bStop) =&;orP { ]B/Gz
s!X@ l 0?8O9i try{ (/UW}$] h URL url = new URL(sURL); Hm!ffqO_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :hr% 6K7 httpConnection.setRequestProperty("User-Agent","NetFox"); dlmF?N|EC String sProperty = "bytes="+nStartPos+"-"; y{
%2Q) httpConnection.setRequestProperty("RANGE",sProperty); u9ObFm$7 Utility.log(sProperty); 6c,]N@,Zw 0+L:+S
S<#>g
s4 InputStream input = httpConnection.getInputStream(); {4J:t_<nKO //logResponseHead(httpConnection); zP$0B!9 IL;JdIa kU{+@MA; byte[] b = new byte[1024]; @E;'Ffo int nRead; XP'<\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) gBp,p\ Xc { D[32t0 nStartPos += fileAccessI.write(b,0,nRead); |ZZl3l=] //if(nThreadID == 1) _&)^a)Nu // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); kH/u]+_ } W/DSj : Y"6
' 3eT5~Lbs Utility.log("Thread " + nThreadID + " is over!"); `2-6Qv bDownOver = true; h\| ~Q.kG //nPos = fileAccessI.write (b,0,nRead); ^YG'p?r.s } (8T36pt~ catch(Exception e){e.printStackTrace ();} `Sgj!/!F } 3D32'KO_" } NbgK#; zGzeu)d kZ7\zbN> //打印回应的头信息 $;7,T~{ public void logResponseHead(HttpURLConnection con) HHVCw7r0 { )r2$!(NQ for(int i=1;;i++) 8T<LNC { ;w>Dqem String header=con.getHeaderFieldKey(i); vP6NIcWC3 if(header!=null) t|-TG\Q X //responseHeaders.put(header,httpConnection.getHeaderField(header)); _3@[S
F Utility.log(header+" : "+con.getHeaderField(header)); KYa}k0tVAp else Q+@/.qJ break; s8BfOl- } ykK21P,v } NZT2ni4 <L'!EcHm%] 4SRjF$Bsz public void splitterStop() eb1WTK@ { ?.Iau/ bStop = true; dpAj9CX( } Qp>'V<%m- 1i=lJmr 4`E[WE:Q } t&|M@Ouet >-8r|};+ QIl=Ho"c /* ]hE%Tk- **FileAccess.java 5SV w71* *//文件访问(定位,写) c{.y9P6 package NetFox; C_>
WU import java.io.*; mq#8[D E>LZw>^YJ qmmQHS public class FileAccessI implements Serializable{ ^.3(o{g )<ig6b% //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U$,-F** RandomAccessFile oSavedFile; m[aBHA^g long nPos; iA.:{^_)09 YQ? "~[mL ycD.X" public FileAccessI() throws IOException 9 +1}8"~ { #*;G8yV this("",0); EBQ,Ypv } aI. 5w9 :O?+Ywn 813t=A public FileAccessI(String sName,long nPos) throws IOException Rtywi}VV2 { r0^ *|+
oSavedFile = new RandomAccessFile(sName,"rw"); $Gs9"~z?; this.nPos = nPos; Cx~,wk;= oSavedFile.seek(nPos); ZNfQM&<d } eewlK] 'kuLkM, o?,c#g public synchronized int write(byte[] b,int nStart,int nLen) cQzUR^oq, { cnw?3/J int n = -1; H8!;
XB try{ 8kdJ;%^N oSavedFile.write(b,nStart,nLen); 2^aXXPC n = nLen; 2xxw8_~C } P>U7RX
e catch(IOException e) uKA-<nM._c { F ?N+ __o e.printStackTrace (); _a]0<Vm C0 } evSr?ys 6uS;H]nd< ,vDSY N6 return n; /Fj*sS8 } 8*x/NaH
/\ \Gl>$5np `8 Ann~Z|k } PAD&sTjE* Q]1s*P qs$w9I /* 5M v<8P~ **SiteInfoBean.java QZwZ4$jkiO */ tkIpeL[d package NetFox; +b
sc3 S^Mx=KJG R$m?aIN public class SiteInfoBean { |S6L[Uo A u10]b <D`VFSEJ private String sSiteURL; //Site's URL a&z$4!wQB private String sFilePath; //Saved File's Path .;J6)h private String sFileName; //Saved File's Name vu@@!cT6e private int nSplitter; //Count of Splited Downloading File [,yYr d~abWBgC` \x=j public SiteInfoBean() Bo+Yu(|cL {//nSplitter的缺省值为5 Je*hyi7 //default value of nSplitter is 5 }PUY~
u this("","","",5); a7U`/* } Oh=E! *<ILSZ 230ijq3YG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) i'YM9*yN { +/>XOY|Ie sSiteURL= sURL; P>nz8NRq sFilePath = sPath; 'T+v&M sFileName = sName; wh2Ljskda8 this.nSplitter = nSpiltter; GHRr+ XXg~eu? 4+B&/}FDLo } tk\)]kj
frRO? `f<&=_,xfH public String getSSiteURL() d3;Sy`. { yPoa04!{= return sSiteURL; WRqpQEY } N{&Hq4^c m)ENj6A>yP +JejnG0 public void setSSiteURL(String value) Ake$M^Bz { Yln[ZmK9g sSiteURL = value; !NO)|N> } aZ'(ar: |hD)=sCj g[L}puN public String getSFilePath() [:M Fx6 { 0bfJD'^9RP return sFilePath; ne|N!!Dmk } \Lg{GN. PiJ>gDx \C kb: public void setSFilePath(String value) M@ =VIrX,m { _/z3QG{Ea^ sFilePath = value; Hrg -5_ } 19;Pjo8 3S"kw ,lFhLj7 public String getSFileName() 4 3G2{ { z7!@^!r return sFileName; UM}MK } 2O(= 2X z9
$1jC b *Ca*! public void setSFileName(String value) |xFSGrC { }qg.Go sFileName = value; m](q,65 2 } #k
t+
)> =JE5/ dO!B=/ public int getNSplitter() 8SN4E { a9!.e
rM return nSplitter; LMaY}m> } MDauHtF, h\/T b8 `s8!zy+ public void setNSplitter(int nCount) 1T
8|>2m 3 { "?>hQM1R nSplitter = nCount; 'MQJt2QU9{ } *6wt+twH } 5Ve
T8/7Q E*s8 nQ" ebiOR1)sN /* R6`,}<A]@ **Utility.java yk/BQ|G */ e=Q{CsP package NetFox; ~\UAxB= {-l:F2i |3C5"R3ZGO public class Utility { j/, I)Za h|N!U/(U W[qQDn!r public Utility() C zxF { yDw#V`Y^M ;:aCZ8e #@:GLmD% } j4+kL4M@H xeW}`i5_w //线程睡眠 <P_B|Y4N/ public static void sleep(int nSecond) f,VJfY?# { c^7QiTt_ try{ ]5+<Rqdbg Thread.sleep(nSecond); R]"
jr } h@+(VQ catch(Exception e) &d=ZCaP { MNocXK e.printStackTrace (); QFU1l"(qGk } "$ U!1 } "bA8NQIP 9uW\~DwsZ% //日志 qsHjqK@( public static void log(String sMsg) /{!?e<N>
{ -5GRit1q? System.err.println(sMsg); Jj7he(!_1 } Rz"gPU4;` .Lp\Jyegs Pk^W+M_)~ public static void log(int sMsg) -aQf(= { fcisDu8n System.err.println(sMsg); b$N&sZ } c;7`]}fGu } kZNVUhW6S x%%OgO+> i|CAN,' /* o,_R;'\E[a **TestMethod.java fvr|<3ojo */ tB<|7 package NetFox; .iZo/_ `Zd\d:Wyv 6.k>J{GG public class TestMethod { DwIX\9 KVp3pUO +t*Ks_V,* public TestMethod() z<,-:=BC" { ///xx/weblogic60b2_win.exe Qw.j try{ f~{4hVA SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); E\vW>g*W //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); />dYk Iv SiteFileFetch fileFetch = new SiteFileFetch(bean); xnPi'?A] fileFetch.start(); W6jdS;3 } c. 06Sw* catch(Exception e){e.printStackTrace ();} |`Iispn .y>G/8_i x"{WLZ } CQ:38l\`gd _qsg2e}n ':DLv{R public static void main(String[] args) %)sG 34 { O^sOv!!RH/ new TestMethod(); xMHu:,ND } iDV.C@ } tVhf1TH# 点击下载更多相关资料
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