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/* VLJ]OW8cO **SiteFileFetch.java ?*ZQ:jH */ $4qM\3x0, package NetFox; reM~q-M~o@ import java.io.*; OR37 import java.net.*; J:O&2g"g
DLD9 {Ppb ; public class SiteFileFetch extends Thread { 7U^{xDg.b N(3Bzd) oOaLD{g> SiteInfoBean siteInfoBean = null; //文件信息Bean ^bfU>02Q6p long[] nStartPos; //开始位置 4wGBB{X long[] nEndPos; //结束位置 5evk_f FileSplitterFetch[] fileSplitterFetch; //子线程对象 Zj_2B_|WN# long nFileLength; //文件长度 L,ax^] boolean bFirst = true; //是否第一次取文件 wG6Oz2( boolean bStop = false; //停止标志 pred{HEye File tmpFile; //文件下载的临时信息 h:sf?X[ DataOutputStream output; //输出到文件的输出流 Db;>MWt+e '-Oh$hqCx| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) U#Iwe= public SiteFileFetch(SiteInfoBean bean) throws IOException ovdaK"q2 { dBS_N/ siteInfoBean = bean; ~*]7f%L- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G9GHBwT tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 06Q9X!xD if(tmpFile.exists ()) s^4wn:*$zd { `^
a:1^ bFirst = false; teC/Uf5 read_nPos(); :Nwv&+ } ]w0Y5H " else {47Uu%XT { +$#XV@@~ nStartPos = new long[bean.getNSplitter()]; aof'shS8 nEndPos = new long[bean.getNSplitter()]; mN . } S)W?W}*R\ ecO$L<9> ;PnN$g]Q R3.w")6 } f`_{SU"3 :SWrx MT /-t!)_zvw public void run() a>9_#_hI { <:T/hm$ //获得文件长度 [>\e@ = //分割文件 adRIg:2 //实例FileSplitterFetch XKDX*x G //启动FileSplitterFetch线程 [2>zaag //等待子线程返回 9I$}=&" try{ :eT\XtxM~{ if(bFirst) fY?:SPR+ { EyA(W;r. nFileLength = getFileSize(); qR_Np5nHF if(nFileLength == -1) }Kp$/CYd { 9_.pLLx System.err.println("File Length is not known!"); @F*z/E}e } 3orL;(.G else if(nFileLength == -2) 5|>ms)[RQ { i)$+#N System.err.println("File is not access!"); eibkG } ~D`R"vzw= else uFhPNR2l { jTZi<
Y:bB for(int i=0;i<nStartPos.length;i++) 9j5|o([J { GoH.0eQ^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); dm40qj } A$n.'*gK for(int i=0;i<nEndPos.length-1;i++) !q$>6P { fe"w--v nEndPos = nStartPos[i+1]; >Z<ZT } 7GG`9!l]D nEndPos[nEndPos.length-1] = nFileLength; UH;bg}=8 } a`]ZyG*P } -[pfLo ^eefR5^_w G#@#j]8 //启动子线程 kmo#jITa` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ' V*}d for(int i=0;i<nStartPos.length;i++) w7Mh8'P54 { u,}>I%21 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), DMs8B&Y= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9C{Xpu nStartPos,nEndPos,i); l@u
"iGw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6W3."}; fileSplitterFetch.start(); +lZ-xU1 } Eza^Tbq%j? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AE`UnlUSF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); n "^rS}Y] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1vCp<D9< nEndPos = " + nFileLength); 0(9gTxdB // fileSplitterFetch[nPos.length-1].start(); Xc^(e?L4 m^0 I3; C8YStT //等待子线程结束 +
65<|0 //int count = 0; TiZ
MY:^ //是否结束while循环 k`]76C7 boolean breakWhile = false; Zy{hYHQ _ouZd. | z_av while(!bStop) Ol<LL#<j4 { 9&<c)sS&B write_nPos(); B<h4ZK% Utility.sleep(500); (!0_s48f breakWhile = true; B}*\ pdJ _ Qek|> ,I+O;B:0 for(int i=0;i<nStartPos.length;i++) kK
5~hpv { \IzZJGi if(!fileSplitterFetch.bDownOver) 9$VdYw7D { 7lJ8<EP9
u breakWhile = false; V~5vR`} break; CDW|cr{ } 7~ZG"^k } SrOv*
D 3 if(breakWhile) kkj@!1q(wO break; >yqEXx5{ #)#'^MZX 2t //count++; ;A*sub //if(count>4) RU=g|TL // siteStop(); ^YfAsBs& } 3/&
|Z<f Z/v )^VR B>z^W+Unyn System.err.println("文件下载结束!"); C:bA:O } <S;YNHLC catch(Exception e){e.printStackTrace ();} XRyeEwA;pp } kI5LG6 3W.D^^)eCV Z3ODZfu> //获得文件长度 W=|'&UU Ul public long getFileSize() ]^{5` { 0tMzVxS int nFileLength = -1; V/R@=[ try{ L;b-=mF URL url = new URL(siteInfoBean.getSSiteURL()); (5[#?_~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I/v#!`L httpConnection.setRequestProperty("User-Agent","NetFox"); -(}N-yu W&Xi&[Ux 5"q{b1 int responseCode=httpConnection.getResponseCode(); KpS=oFX{} if(responseCode>=400) YxA nh { R_Bf JD. processErrorCode(responseCode); M$f_I + return -2; //-2 represent access is error rfZg } ^BI&-bR@ 9+5F(pd( c]z^(:_> String sHeader; 0&r}'f? OT)`)PZ" =U:]x'g( for(int i=1;;i++) CaoQPb* { 40-/t*2Ly //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]Rp<64I o //Utility.log(in.readLine()); v{\~>1J{ sHeader=httpConnection.getHeaderFieldKey(i); |Z Cv>8?n if(sHeader!=null) P5"B7>L: { #}Ays#wA>? if(sHeader.equals("Content-Length")) : B1
"=ly { I4c%>R nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 6Hd^qouid break; D6e<1W } *1>T c,mb } _F8-4 else U[#q"'P|l break; $.B}zY{ } ~ r$I&8 }
Ox'KC catch(IOException e){e.printStackTrace ();} % %2~%FVb catch(Exception e){e.printStackTrace ();} !yV)EJ:$ 15DlD`QV U2JxzHXZ Utility.log(nFileLength); y>RqA*J X<1ymb3 [FWB return nFileLength; L;KLmxy# } g|!=@9[dv icK U) -r0oO~KT //保存下载信息(文件指针位置) 1;>RK private void write_nPos() BTE&7/i21 { SC2g5i` try{ a<V
Mh79* output = new DataOutputStream(new FileOutputStream(tmpFile)); 52.hJNq#L output.writeInt(nStartPos.length); VrFI5_M/ for(int i=0;i<nStartPos.length;i++) )9!ZkZbv_m { a$6pA@7} // output.writeLong(nPos); Io_7 output.writeLong(fileSplitterFetch.nStartPos); Z \- output.writeLong(fileSplitterFetch.nEndPos); _g"su# } Q?9eu%G6I output.close(); OQT i$2 } fAvB!e catch(IOException e){e.printStackTrace ();} HlX7A1i/ catch(Exception e){e.printStackTrace ();} ACgWT } &0-Pl.M _'s5FlZq \z2d=E //读取保存的下载信息(文件指针位置) u)ZZ/| private void read_nPos() ['0^gN$:e { vF@.BM> try{ 9x9E+DG#( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +Pn`AV1 int nCount = input.readInt(); Gs}lw'pK nStartPos = new long[nCount]; jg3['hTJT nEndPos = new long[nCount]; %,) Xi for(int i=0;i<nStartPos.length;i++)
q0\$wI { Q@UY4gA' nStartPos = input.readLong(); q{)Q ?E nEndPos = input.readLong(); %E2C4UbY } 2Xfy?U input.close(); <^8OYnp } 'wTJX> catch(IOException e){e.printStackTrace ();} WF<*rl catch(Exception e){e.printStackTrace ();} +Nka,C^O" } sM%.=~AN cACnBgLl zU};|Zw private void processErrorCode(int nErrorCode) V0:db { u\UI6/ System.err.println("Error Code : " + nErrorCode); jTY{MY Jh } 6[>Z y)P ]PXpzruy
(8j@+J //停止文件下载 8L(KdDY public void siteStop() \G1(r=fU { /M_kJe,% bStop = true; oga0h' for(int i=0;i<nStartPos.length;i++) 5wMEp" YHE fileSplitterFetch.splitterStop(); faI4`.i Qp>Q-+e0 PFeK;`[ } O,KlZf_B } dtq]_HvTJ //负责部分文件的抓取 yAVt[+0 **FileSplitterFetch.java ~9+\ */ k+cHx799 package NetFox; aeF^&F0 7kidPAhY W-ECmw( import java.io.*; Bk~M ^AK@~ import java.net.*; .'N#qs_ 2E3x= G{oM2`c'#8 public class FileSplitterFetch extends Thread { ZbcpE~<a cY*lsBo C/pu]%n@4 String sURL; //File URL ^kpu9H long nStartPos; //File Snippet Start Position Z7R+'OC long nEndPos; //File Snippet End Position Aaix?
|XN int nThreadID; //Thread's ID ZsYT&P2 boolean bDownOver = false; //Downing is over x68s$H boolean bStop = false; //Stop identical ~#
|p=Y FileAccessI fileAccessI = null; //File Access interface /d-7n|#E ZpY"P6 rk(0w|zR+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException FKB)o7
{ >pA9'KWs] this.sURL = sURL; ]qc2jut" this.nStartPos = nStart; ^zaN?0%S33 this.nEndPos = nEnd; @;z}Hk0A nThreadID = id; 'GcZxF0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 aG\B?pn- } 6e;.}i \<A@Nf" |4a#O8d public void run() zHCz[jlrMq { U=bZy,FT$ while(nStartPos < nEndPos && !bStop) 7e&%R4{b { v<Ux+- [t`QV2um _/!IjB:(70 try{ 3^zOG2 URL url = new URL(sURL); %@FTg$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VIxcyp0X httpConnection.setRequestProperty("User-Agent","NetFox"); #65Uei|F`+ String sProperty = "bytes="+nStartPos+"-"; oMi"X"C:q httpConnection.setRequestProperty("RANGE",sProperty); ,!4(B1@
Utility.log(sProperty); ?wx|n_3<: 1cdM^k C,D~2G InputStream input = httpConnection.getInputStream(); Z5o6RTi //logResponseHead(httpConnection); #yVY!+A izi=`;=D^ zKk2>. byte[] b = new byte[1024]; ABp/uJI) int nRead; 5<ycF_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u|D_"q~+6 { A3N<;OOk nStartPos += fileAccessI.write(b,0,nRead); AHhck?M^ //if(nThreadID == 1) 9_GR\\ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cv["Ps#;`W } aNCIh@m~
Ol24A^ lH ^[b[ Utility.log("Thread " + nThreadID + " is over!"); R@r"a&{/ bDownOver = true; r#pC0Yj!3 //nPos = fileAccessI.write (b,0,nRead); _`zj^*% } 6F3#Rxh catch(Exception e){e.printStackTrace ();} #\$R^u]! } 5!G}*u. } I%whM~M1+ 3say&|kJ LdAfY0 //打印回应的头信息 "tbKKh66 public void logResponseHead(HttpURLConnection con) /%U+kW { a ^b_&}y for(int i=1;;i++) Bn/{J { GV([gs String header=con.getHeaderFieldKey(i); igsJa1F if(header!=null) X&6p_Lo //responseHeaders.put(header,httpConnection.getHeaderField(header)); i1?H*:] Utility.log(header+" : "+con.getHeaderField(header)); iVt6rX else x,z +l-y break; NQ!jkojD } q8.K-"f(Q } MDS;qZx= 0>m-J ,r{\aW@ public void splitterStop() /AP@Bhm { F"3PP ~ bStop = true; oToUpkAI } @%K@oD L (&FSoe/![' Cv|ya$}a } r"a0!]n gYx|Na,+ YzSUJ=0/ /* 8|w_PP1oE **FileAccess.java Z*QsDS *//文件访问(定位,写) nJ4i[j8 package NetFox; Qsc%qt-l import java.io.*; /4]M*ls QOkPliX n=n!Hn public class FileAccessI implements Serializable{ fNc3&=]] LzS@@'] //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RUmJ=i'4/ RandomAccessFile oSavedFile; ZUb6d*B long nPos; \&J7>vu^y -1~bWRYq Mjrl KI}f/ public FileAccessI() throws IOException C w`v\
9 { E3y" this("",0); g&H6~ +\ } ewSFB <
N T"XP`gk G_g~-[O public FileAccessI(String sName,long nPos) throws IOException J
A ]s { #n7uw oSavedFile = new RandomAccessFile(sName,"rw"); ao<@a{G this.nPos = nPos; BM#cosV7%h oSavedFile.seek(nPos); "8aw=3A } iNgHx[*? XS]=sfN M&
GA:` public synchronized int write(byte[] b,int nStart,int nLen) =usx' #rb { r"SuE:D int n = -1; yK<%AV@v try{ utC]GiR oSavedFile.write(b,nStart,nLen); JB a:))lw n = nLen; h&||Ql1 } impzqQlZ, catch(IOException e) -82Rz { 16[>af0<g e.printStackTrace (); 0 }k[s+^ } ig]*Z P'GX-H TGGeTtk= return n; j8!fzJG } [L8Bgw1 _K>cB<+d L{;q ^ } qCn(~: I3D8xl>P\ q4PRc<\^ /* hVI
$r **SiteInfoBean.java Z16G */ WaQCq0Enj package NetFox; /NaIMo5 c$Js<[1 ?&ThMWl public class SiteInfoBean { jm'(t=Ze SJ;u,XyWn a1]k(AuQrC private String sSiteURL; //Site's URL d {a^ private String sFilePath; //Saved File's Path oori t private String sFileName; //Saved File's Name -kxNJ Gc? private int nSplitter; //Count of Splited Downloading File qdrk.~_ W`K XO|'p@ xxgS!J public SiteInfoBean() f@+[-yF {//nSplitter的缺省值为5 as-
Z)h[B //default value of nSplitter is 5 &!vJ3: this("","","",5); kN>%y&cK } c%r?tKG6 }kdYR#{s pj G6v(zK public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z_~f/ { &i4*tE3], sSiteURL= sURL; Gvw4ot/ sFilePath = sPath; u[dR*o0' sFileName = sName; Ey=(B'A~ this.nSplitter = nSpiltter; M2_sxibI jzSh|a9_ ]d}Z2I' } <ZxxlJS)6 k:Sxs+)?1 $R%xeih1fz public String getSSiteURL() pHEhB9_A! { YA O,
rh return sSiteURL; Wo2TU! } I.A7H'j ,5HQHo@ B1oi]hDy public void setSSiteURL(String value) :XEP:8 { q
[Rqy !, sSiteURL = value; c_<m8b{AEF } X"YH49? R:P'QM *x2+sgSf_0 public String getSFilePath() |Xk'd@< { _>%P};G{> return sFilePath; 2i*-ET } mBSa*s) S)of.Nq.; l9"0Wu@_x public void setSFilePath(String value) b26#0;i { $Mm=5K% sFilePath = value; `@q[&^ } u~7mH -"[o|aa^ |}
;&xI public String getSFileName() X:bv
?o>Y { ~q4KQ&.! return sFileName; %bgjJ` } orYE& #'fh'$5" t=o0
#jo public void setSFileName(String value) lxx)l(& { Y b\t0:_ sFileName = value; wl1i@&9 } htX;"R& DW&%"$2 CRf !tsj@ public int getNSplitter() B :#5U85m { 2K4Jkyi return nSplitter; b<>GF-`w } : kz*.1 _^;+_6&[ QPB@qx#@ public void setNSplitter(int nCount) 5[}3j1 { Osncl5PD) nSplitter = nCount; sS(t
}$ } &NZl_7PL } =(:{>tO_" (? j $n?p 8}z]B^?Fy /* yH5^EY7rQ **Utility.java 5S`_q& */ XG FjqZr` package NetFox; oU`8\n]( <"F\&M`G @zo}#.g public class Utility { wZB:7E% 2(M^8Bl S`g:zb_ public Utility() 1.*VliY { &<hDl<E ,(&jG^IpVJ
uyBmGS2 } IlQNo 1 ATx6YP@7~ //线程睡眠 mOgsO
public static void sleep(int nSecond) &AM<H}> { };;\&# try{ l3kYfq{";" Thread.sleep(nSecond); +TzZ
} hbl%<ItI49 catch(Exception e) (1pI#H"f9 { /Iht,@%E e.printStackTrace (); \1|]?ZQ\ K } aK>5r^7S } !kCMw%[ b-4gHW //日志 7OuzQzhcK public static void log(String sMsg) n[DQ5l { &D@/_m $ System.err.println(sMsg); n.9k< } '](4g/% T,N"8N{K" rHe*/nN%* public static void log(int sMsg) [MLJs-* { >d#oJ?goX System.err.println(sMsg); YDh6XD<Z } }xhat,9 } L(Ww6oj O`Ht|@[6 CUJP"u>8M /* :eIPPh|\ **TestMethod.java &XG k */ 5A| 4 package NetFox; vwy10PlqL UrAg*v!Qy V.<$c1#=$ public class TestMethod { >JdA,i}1 >6 p
<n ~9#x/EG/ public TestMethod() 5gP<+S#>T { ///xx/weblogic60b2_win.exe X( Q*(_ try{ %1f, 8BM SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); "V/|RC //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j5hM|\] SiteFileFetch fileFetch = new SiteFileFetch(bean); lIR0jgP@z fileFetch.start(); !%w#h0(b } D2hEI2S catch(Exception e){e.printStackTrace ();} OPm?kr g7*"*%v 2 F\pw0^K;N } \=n0@1Q=> O<}^`4d /WIO@c public static void main(String[] args) Z)iRc$; { r]! <iw new TestMethod(); b1X.#pz7F } nq'vq]] } ?gZJ v 点击下载更多相关资料
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