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/* 5|/vc*m_0' **SiteFileFetch.java 0q3:"X */ <9Chkb|B package NetFox; .!`j3W] import java.io.*; ,rN7X<s54 import java.net.*; >s>5k
O dp?uq' ]f\rB8k|& public class SiteFileFetch extends Thread { o 1b#q/ 8=e\^Q+ ?@XO*|xkSk SiteInfoBean siteInfoBean = null; //文件信息Bean *7Mrng long[] nStartPos; //开始位置 II2oV}7? long[] nEndPos; //结束位置 ;S%wPXj& FileSplitterFetch[] fileSplitterFetch; //子线程对象 :r6
bw long nFileLength; //文件长度 >,y QG+ boolean bFirst = true; //是否第一次取文件 c[YC}@l%a boolean bStop = false; //停止标志 Xak~He File tmpFile; //文件下载的临时信息 {Cd*y6lI DataOutputStream output; //输出到文件的输出流 LO2sP"9 ffWvrY;j[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) N$3F4b%+ public SiteFileFetch(SiteInfoBean bean) throws IOException [m"X*ZF { .c',?[S/vH siteInfoBean = bean; ePF9Vzq //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); f"-?%I*' tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b1^MX).vH if(tmpFile.exists ()) <k)rfv7 { "#OmmU<U bFirst = false; t9=rr>8) read_nPos(); |?0C9 } ;m\(fW*ii else QOO BCNe { 9:m+mpL=9 nStartPos = new long[bean.getNSplitter()]; 6tJM*{$$H nEndPos = new long[bean.getNSplitter()]; |_A35"v } 1wq6E 9K&b1O@Aj yb]a p O[m+5+ } +Y\#'KrA l>:?U "kL5HD]TC public void run() +Gjy%JFp { eC3ZK"oJ //获得文件长度 D]0#A|nF //分割文件 7_|zMk.J* //实例FileSplitterFetch 1,/oS&?E //启动FileSplitterFetch线程 )i?wBxq'MA //等待子线程返回 TcqqAc try{ ?iq:Gf if(bFirst) %@IR7v~ { ZA# jw 8F nFileLength = getFileSize(); 4[(P>`Unx if(nFileLength == -1) Vw,dHIe(3 { cL}g7D System.err.println("File Length is not known!"); {:"bX~<^ } d)
> if<o else if(nFileLength == -2) tV T(!&( { _ '}UNIL System.err.println("File is not access!"); phNv^R+ } VMNihx0FJ else 1ptP ey { ruA!+@or for(int i=0;i<nStartPos.length;i++) S4\T ( { [#.QDe nStartPos = (long)(i*(nFileLength/nStartPos.length)); ul:jn]S* } NQOdgp for(int i=0;i<nEndPos.length-1;i++) ^
sz4rk { e06r5%|.% nEndPos = nStartPos[i+1]; VJPt/Dy{ } Vdjca:` nEndPos[nEndPos.length-1] = nFileLength; f6z[k_lLN } O/FQ'o1F } sqkPC_;A K/08F|]a Xf.SJ8G //启动子线程 R[9[lQ'vR fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5` Q#2 for(int i=0;i<nStartPos.length;i++) }96^OQPE { Q2+e` fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,H|V\\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Iz ,C!c nStartPos,nEndPos,i); qEywExdiu Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); J0{0B=d; fileSplitterFetch.start(); Er%nSH^" } e\)PGjSI // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tW 9vo-{+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /Jo*O=Lpo // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f):|Ad| nEndPos = " + nFileLength); O* 7"Q& // fileSplitterFetch[nPos.length-1].start(); -()CgtSR AJj6@hi2P p!HpqW //等待子线程结束 uv Z!3 UH. //int count = 0; =WHdy; //是否结束while循环 V a<L[8 boolean breakWhile = false; p-;*K(#X "zYlddh %SIbpk% while(!bStop) _TkiI. ' { 8?ZK^+]y write_nPos(); xC{ W_a( Utility.sleep(500); >8QLo8)3C breakWhile = true; t.3b\RV[ k|&@xEbS
MvQ0"-ZQ for(int i=0;i<nStartPos.length;i++) tLLP2^_& { pWeKN` if(!fileSplitterFetch.bDownOver) l].dOso$` { O,hT<
s " breakWhile = false; VBy=X\w] break; V:yia^1 } \]GBd~i< } j]YS(Y@AY
if(breakWhile) >+&524xc break; eAPGy- JH5ckgdZ =r#of|`Q //count++; \y{C>!WX4 //if(count>4) @/7tN3O // siteStop(); eR =P } Hh,q)(Wo ]^E<e!z={$ oS, %L System.err.println("文件下载结束!"); =M>pL+# } F!'y47QD catch(Exception e){e.printStackTrace ();} tpU[KR[- } *i&ks>4N bF<FX_}!s! 8|HuxE //获得文件长度 }H\wed]F/ public long getFileSize() M2{{B^*$6 { ]~GwZB'M int nFileLength = -1; )} tI8 try{ oBpHmMzA URL url = new URL(siteInfoBean.getSSiteURL()); 4Y;z46yM% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iJT_*,P^ httpConnection.setRequestProperty("User-Agent","NetFox"); )Z,O*u* g>cp;co9g =:uK$>[ int responseCode=httpConnection.getResponseCode(); X=8y$Yy if(responseCode>=400) }f/ 1 { )|zLjF$ processErrorCode(responseCode); Etj@wy/E return -2; //-2 represent access is error ~#C7G\R } Ho2#'lSKM &Y4S[- 1pg&?L.MA String sHeader; **N{XxdN f,9 /Yg_ ")}^\Om for(int i=1;;i++) Uf4A9$R.G { >^=upf/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *2P%731n5 //Utility.log(in.readLine()); \oA>%+]5 sHeader=httpConnection.getHeaderFieldKey(i); &s-iie$"@x if(sHeader!=null) !:]CKbG { Cjc>0)f&. if(sHeader.equals("Content-Length")) +`}QIp0 { ibAZ=RD nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Arc6d5Q break; aA7}> } 3"FvYv{ } }>]V_}h else &{-r 5d23 break; m<}>'DT } r~nD%H:}P } `tw[{Wb catch(IOException e){e.printStackTrace ();} B:J([@\' catch(Exception e){e.printStackTrace ();} <Nwqt[. JFewOt3 (E[c-1s Utility.log(nFileLength); ]Dec/Nnj y(^t &tgjS <n? cRk'. return nFileLength; '{*{ } \MI2^JN j*Uz.q? 'guXdX]Gu //保存下载信息(文件指针位置) 3CcCcZ9I private void write_nPos() X$BN&DD { fqpbsM;M] try{ Pu>jECcz output = new DataOutputStream(new FileOutputStream(tmpFile)); >>bsr#aJ output.writeInt(nStartPos.length); +-2o b90_m for(int i=0;i<nStartPos.length;i++) :8h\x { B8.a#@R // output.writeLong(nPos); &YpViC4K. output.writeLong(fileSplitterFetch.nStartPos); CiF(
output.writeLong(fileSplitterFetch.nEndPos); ( f]@lNmx } EdcbWf7 output.close(); QiKci%=SX } x$hhH= catch(IOException e){e.printStackTrace ();} Bm"-X:=' catch(Exception e){e.printStackTrace ();} r ]s7a?O } 3EkCM_] X\4d|VJ?m fJ<I|ZZ //读取保存的下载信息(文件指针位置) iq1HA.X( private void read_nPos() .bYZkO:oy { &X3G;x2; try{ 03pD< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <fSWX>pR int nCount = input.readInt(); -d>2&)5 nStartPos = new long[nCount]; `) y<X#[8 nEndPos = new long[nCount]; 00SYNG! for(int i=0;i<nStartPos.length;i++) >^:*x_a9 { WoV"&9y nStartPos = input.readLong(); |#(KP nEndPos = input.readLong(); A:b(@'h } 1aAY7Dm_& input.close(); I%(YR" } NTWy1 catch(IOException e){e.printStackTrace ();} aC90IJ8^ catch(Exception e){e.printStackTrace ();} _+7+90u } 0Wkk$0h9 S@Iza9\|@ d6^:lbj private void processErrorCode(int nErrorCode) eR3v=Q { Kd r7 V System.err.println("Error Code : " + nErrorCode); ;O `ZVB } atiyQuT6Wh ES}V\k*} \qf0=CPw8 //停止文件下载 kz_gR;"(Z public void siteStop() O:E0htdWr { ZWmS6?L. bStop = true; jlxY|;gZ-0 for(int i=0;i<nStartPos.length;i++) YY zUg fileSplitterFetch.splitterStop(); b1TIVK3m ]J1oY]2~ yopC
<k } =cR"_ Z[8X } 9\'JtZO //负责部分文件的抓取 `' .;U=mF **FileSplitterFetch.java HVd y!J */ 4bs<j package NetFox; \E(^<Af ~U r gU&y5s~ import java.io.*; 8$F"!dc _ import java.net.*; CM%Rz-c 5^ck$af 38GkV.e}$ public class FileSplitterFetch extends Thread { m]+~F_/ K'Y/0:"* N_^PoX935O String sURL; //File URL u{- @,-{ long nStartPos; //File Snippet Start Position q4#$ca[_ak long nEndPos; //File Snippet End Position ))%f"=:wt int nThreadID; //Thread's ID U)[LKO1 boolean bDownOver = false; //Downing is over C:AD ZJL boolean bStop = false; //Stop identical A`~R\j FileAccessI fileAccessI = null; //File Access interface i/.#` =,b6yV+$D 4^Ss\$* public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1=Kt.tuf { ^Ig QIN this.sURL = sURL; 8NkyT_\ this.nStartPos = nStart; dl.gCiI this.nEndPos = nEnd; Cag^$nj nThreadID = id; N~uc%wOA fileAccessI = new FileAccessI(sName,nStartPos);//定位 S zNZY&8
f } Bs`mzA54 htT9Hrx {'Y()p3kl public void run() sWmqx$ { \G#_z|'dN while(nStartPos < nEndPos && !bStop) eQz.N<f" { c/7}5#Rs h`dHk]O Mkh/+f4 try{ [_eT{v2B4 URL url = new URL(sURL); )&DsRA7v HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {,!!jeOO httpConnection.setRequestProperty("User-Agent","NetFox"); -{}(U String sProperty = "bytes="+nStartPos+"-"; #<~oR5ddlb httpConnection.setRequestProperty("RANGE",sProperty); *>/w,E] Utility.log(sProperty); Lv?jg?$ H u9nJ <0VC`+p<) InputStream input = httpConnection.getInputStream(); ihJ!]#Fbm //logResponseHead(httpConnection); ch2m Ei( +DG-MM%\ w\mT ug byte[] b = new byte[1024]; mGDy3R90 int nRead;
E-%$1=; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R$!]z( { [+d~He nStartPos += fileAccessI.write(b,0,nRead); <BIQc,)2} //if(nThreadID == 1) ;m7~!m) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {qGXv@
I6 } rd>>=~vx=/ \2!. k`#E#1niN Utility.log("Thread " + nThreadID + " is over!"); |$;4/cKfy bDownOver = true; _&(L{cFx6 //nPos = fileAccessI.write (b,0,nRead); T6b~uE } F Uz1P catch(Exception e){e.printStackTrace ();} nuDu } <ne?;P1L } |"PS e~ u GSs?!BIC q:nUn?zB //打印回应的头信息 3ZC@q
#R
A public void logResponseHead(HttpURLConnection con) ,Ne9x\F { (t){o>l for(int i=1;;i++) !rs }83w! { ]c v/dY# String header=con.getHeaderFieldKey(i); nrA 4N1 if(header!=null) T+x
/J]A //responseHeaders.put(header,httpConnection.getHeaderField(header));
lI%RdA[ Utility.log(header+" : "+con.getHeaderField(header)); Wy\^} else BL~#-Mm<|l break; C=CZtjUt } qRgFVX+vc } w:9`R<L 5VpqDL~d =`*@OJHH public void splitterStop() {Mj- $G" { KwV!smi2 bStop = true; }9^'etD } B uso
`G =E$bZe8 A9g/At_ } p0y|pD $tF\7.e@ ~3-"1E>Rgy /* RX%)@e/@ **FileAccess.java nGwon8&]] *//文件访问(定位,写) U.V/JbXX package NetFox; dGj0;3FI% import java.io.*; tK@7t0 s?s,wdp HL]J=Gh public class FileAccessI implements Serializable{ pacD7'1{
;&gk)w6* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4%zy$,|e RandomAccessFile oSavedFile; Pwj|]0Y@ long nPos; S(U9Dlyarg #>HY+ ; ~ o2Z5,H public FileAccessI() throws IOException
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HWs { e`U
6JzC this("",0); 5~Ek_B } kN3 <l7 0 'THL%lK <KK.f9^o( public FileAccessI(String sName,long nPos) throws IOException x_I*6? { #_x5-?3 oSavedFile = new RandomAccessFile(sName,"rw"); Xn?.Od( this.nPos = nPos; `1n^~ oSavedFile.seek(nPos); Qd\='*:! } cl1ygpf( D 5oYcGc 9BpxbU+L; public synchronized int write(byte[] b,int nStart,int nLen) /F9Dg<#a { j!NXNuy: int n = -1; g\q4- try{ qBcbMa9m oSavedFile.write(b,nStart,nLen); oemN$g&7 n = nLen; SUIJ{!F/ } `R
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catch(IOException e) &;pM<h { ? %8%1d e.printStackTrace (); *U6+b } ;du},>T$n /\<x8BJ Z*f%R\u return n; 'K02T:\iZ } l`l6Y>c*] ^|zag _68vSYr } XkkzY5rxOc !;mn]wR>a iLJ@oM;2 /* yGNpx3H
**SiteInfoBean.java F!g1.49"" */ rNJU &
.] package NetFox; o~e_M- ]T|$nwQ fMUh\u3 public class SiteInfoBean { !ht2*8$lQ Wu<;QY($5 @k)J
i!7 private String sSiteURL; //Site's URL P7zUf private String sFilePath; //Saved File's Path 6M`gy|"(~ private String sFileName; //Saved File's Name )eT>[['fm private int nSplitter; //Count of Splited Downloading File hu} vYA7ZH vf@j d}? 1$.svR public SiteInfoBean() ;+(_stxqV9 {//nSplitter的缺省值为5 /n(0w` //default value of nSplitter is 5 `p9N| V this("","","",5); V sxI } [;7zg@Sa 4i{Xs5zk <9
^7r J public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) G1w$lc { AaxQBTB sSiteURL= sURL; QW,:'\G sFilePath = sPath; ~XP|dn} sFileName = sName; 7S
8X) this.nSplitter = nSpiltter; 0>BI[x@ pZeOdh S>h\D4. } 8x)i{>#i $:oC\K6 MZX)znO public String getSSiteURL() 0;T7fKj { I}o}
#OJ return sSiteURL; )D#} /3s } eGg6wd fNu/> pN qD\9h`a public void setSSiteURL(String value) 1$Q[%9 { QwpX3
k6 sSiteURL = value; 'h0>]A 2|X } mRC3w(W :<B_V< dmXfz D public String getSFilePath() @v@F%JCZ { |>xuH#Q return sFilePath; bo90;7EK8 } 6'N_bNW QtG6v<A ps:`rVQ7 public void setSFilePath(String value) `?R{sNr. { _*?qOmf= sFilePath = value; O9d"Z$~n=j } <`=Kt[_BQ VVAc bAGJ UCmy$aW public String getSFileName() -Z:x!M[Xr { QN$s%&O return sFileName; &PL=nI\) } Rh)XYCM y;fF|t<y LI3L~6A> public void setSFileName(String value) )P
b$ { h9imS\gfr sFileName = value; W!\%v" } kiN,N]-V G%l')e)9Gq j7Y7&x" public int getNSplitter() )4qspy3 { S .x>w/ return nSplitter; %JiF269 } ?)(/SZC0 ]o"E4Vht X[tB ^` public void setNSplitter(int nCount) |hi,]D^Kc { fVY I nSplitter = nCount; G8__6v~ } SE' |||B } DMsqTB` !e<2o2~. z8"1*V /* _<mY| **Utility.java ?t6wozib2 */ {*hvzS{1d package NetFox; e~(e&4pb !idVF!xG [o(!/38"@= public class Utility { RV{%@1Pu H.>EO|p H<fi,"X^ public Utility() # }}6JM { Dzu//_u BH~zeJ*Pr r0[<[jEh } 8N"WKBj|_d \MmOI<Hd- //线程睡眠 eHs38X public static void sleep(int nSecond) x"C7NW[$ { R+K|K2" try{ S&IW]ffK Thread.sleep(nSecond); _oG%bNM } nIlTzrf6 catch(Exception e) l1<=3+d {
<a=OiY e.printStackTrace (); Hik=(pTu> } oLX[!0M^ } t>N2K-8Qh T+B-R\@t //日志 qyVARy public static void log(String sMsg) %B#T"=Cx { 1QD49) System.err.println(sMsg); 6XZjZ*)W } H{N},B XY? Cl fB7Jx6 public static void log(int sMsg) MS#*3Md&y { VO {z)_ System.err.println(sMsg); oGI'a:iff } z^tzP~nI } T*#M'H7LSQ 0nD?X+ u D4hT Hh /* U*yOe*> **TestMethod.java QP50.P5g */ dwUDhQt3Q package NetFox; B-KMlHe n^|xp;] : JCBX?rM/ public class TestMethod { "HqmS P* &0HbJ d*6/1vyjT public TestMethod() Z]DZ:dF { ///xx/weblogic60b2_win.exe S~fP$L5 try{ DHeZi3&i SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C%E~9_w //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); J|
wk})? SiteFileFetch fileFetch = new SiteFileFetch(bean); FF^h(Ea fileFetch.start(); 1Vz^?t: } "PN4{"`V catch(Exception e){e.printStackTrace ();} ,66(*\xT VR1]CN"G sk8DW } $")Gd@aR <
-W 8 ge?0>UU;~ public static void main(String[] args) }|;j2'(R { I9xu3izAmR new TestMethod(); (b[=~Nh' } owA8hGF } C<9GdN 点击下载更多相关资料
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