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/* ["^? vhv **SiteFileFetch.java 6UKZ0~R */ dym K @ package NetFox; =&I9d;7 import java.io.*; IOT-R!.5V import java.net.*; 4$+1&+@ ] `?G&w.Vs ,GF]+nI89 public class SiteFileFetch extends Thread { b4&l=^:e= ?DGg.2f QpD-%gN SiteInfoBean siteInfoBean = null; //文件信息Bean jS ?#c+9 long[] nStartPos; //开始位置 ShesJj long[] nEndPos; //结束位置 4<V}Aj8l FileSplitterFetch[] fileSplitterFetch; //子线程对象 |*$0~mA long nFileLength; //文件长度 bH.SUd) boolean bFirst = true; //是否第一次取文件 H/U.Bg 4 boolean bStop = false; //停止标志 v\o
m File tmpFile; //文件下载的临时信息 Z 4QL&?U
DataOutputStream output; //输出到文件的输出流 R-YNg A <_{7F9 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <?>tjCg' public SiteFileFetch(SiteInfoBean bean) throws IOException o~7D=d?R { Tq?7-_MLC$ siteInfoBean = bean; 5=#2@qp //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $5:I~-mx tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); FsLd&$?T& if(tmpFile.exists ()) GL%)s?
{ h
S)lQl:^ bFirst = false; 2]]}Xvx4# read_nPos(); h~lps?.#b } ot0g@q[3 else 5PsjGvm.% { Ya4yW9* nStartPos = new long[bean.getNSplitter()]; #mYe@[p@ nEndPos = new long[bean.getNSplitter()]; \%&):OD1 } 6 2#@Y-5 d uP0US NvC @ $zM \Jd } (&SPMhs_|( RzU9]e :{
iK 5 public void run() zZ,"HY=jN { ++n_$Qug //获得文件长度 xR8y"CpE //分割文件 ~ mz X1[ //实例FileSplitterFetch =h xyR; //启动FileSplitterFetch线程 #jJ0Mxg //等待子线程返回 ZUD{V try{ P?^%i if(bFirst) =ld!=II { $_3)m nFileLength = getFileSize(); 6"?#E[ #[ if(nFileLength == -1) !jf!\Uu[U { ep4?;Qmho System.err.println("File Length is not known!"); W[R`],x` } WcQkeh3n else if(nFileLength == -2) Po&'#TC1 { # [
+n( System.err.println("File is not access!"); #&ei } +IMt$}7[ else ,`PYU[ { $4*gi& for(int i=0;i<nStartPos.length;i++) EeHghq { @Ko#nDEq nStartPos = (long)(i*(nFileLength/nStartPos.length)); -/
G#ls|? }
`n@;%*6/ for(int i=0;i<nEndPos.length-1;i++) hXvC>ie(i { ;66{S'*[ nEndPos = nStartPos[i+1]; 3-oKY*jO } [)?9|yY"` nEndPos[nEndPos.length-1] = nFileLength; J:J/AgJuH }
fda4M } ii&ckg>]z l[i1,4 [+8*}03 //启动子线程 el\xMe^SY fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]TJ258P} for(int i=0;i<nStartPos.length;i++) 1;PI%++ { 97 ,Y q3 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), u1gD*4+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Nf)SR#; nStartPos,nEndPos,i); =dwy 4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "&{.g1i9 fileSplitterFetch.start(); 6J_$dzw } ZuZCIqN // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D^a(|L3; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :wEy""*N0 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", q&}+O nEndPos = " + nFileLength); i9V, // fileSplitterFetch[nPos.length-1].start(); c$lZ\r" mN>(n+ly Q+/P>5O/ //等待子线程结束 x0%yz+i{: //int count = 0; z`eMb //是否结束while循环 GXk
|p8 boolean breakWhile = false; kkW }:dBl ^x$1Nf ,B /b>i while(!bStop) 8Q"1I7U { acgx')!c write_nPos(); E^A!k=> Utility.sleep(500); >vR2K^ breakWhile = true; 6$kh5$[ q: X^V$` 3[m2F O,Z for(int i=0;i<nStartPos.length;i++) =GW[UnO { m=Gb<)Y if(!fileSplitterFetch.bDownOver) ;Wa&Dg/5` { Jl6lZd(Np breakWhile = false; dt>9mF q break; \.+:yV<$ } ;)SWwhQ } Bj"fUI!dK if(breakWhile) m.\JO break; &;`E3$> u.*}'C>^^v ZD7qw*3+ //count++; ~3&hvm[IQ //if(count>4) dPxJ`8 // siteStop(); xZM4CR9]*C } #_|O93HN' g_!xD;0 )]LP8
J& System.err.println("文件下载结束!"); j,SZJ{ebXg } Dd,i^,4Gj catch(Exception e){e.printStackTrace ();} -1~o~yGE } AX'-}5T= L
" 'd(MD X<pNc6 //获得文件长度 5sj$XA?5 public long getFileSize() =;F7h
@: { FD~
UF;VQ int nFileLength = -1; ;g;1<?
[ try{ LU8:]zOY URL url = new URL(siteInfoBean.getSSiteURL()); ^QG<_Dm] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); aR'~=t&;z1 httpConnection.setRequestProperty("User-Agent","NetFox"); ori[[~OyB FQE(qltf, cct/mX2&~ int responseCode=httpConnection.getResponseCode(); .6I'V3:Kg if(responseCode>=400) :h/v"2uDN { eAqpP>9n processErrorCode(responseCode); ITEf Q@#jU return -2; //-2 represent access is error =fdW H4 } ?GtI.flV NB86+2stu Y"^.6 String sHeader; ZR"qrCSw` fC[~X[H )O$S3ojZ for(int i=1;;i++) tA,J~|+f: { HD1/1?y!@q //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); WTjmU=<\ //Utility.log(in.readLine()); vS[\j sHeader=httpConnection.getHeaderFieldKey(i); (<@`MPI\@ if(sHeader!=null) i el@"E 4 { 9'(m"c_ if(sHeader.equals("Content-Length")) "DH>4Q]
d { U!K#g_} nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +x/vZXtOK break; >6@,L+-6r } &3xda1H } ?^^TR/ else uq7/G| break; ^#K^W V } skTtGz8R[ } .7:ecFKk catch(IOException e){e.printStackTrace ();} R9D2cu,{ catch(Exception e){e.printStackTrace ();} 6+"gk( i70\`6*;B .I $+
E Utility.log(nFileLength); =W2I0nr. opu)9]`z Snp(&TD<< return nFileLength; =UWW(^M#[: } {sj{3I u aGws?<1$ 'z)cieFKP //保存下载信息(文件指针位置) &OEBAtc/ private void write_nPos() ;B(16&l=q { qV,x )y:V try{ ,S@B[+VZ output = new DataOutputStream(new FileOutputStream(tmpFile)); E9t8SclV output.writeInt(nStartPos.length); "Vp:Sq9y for(int i=0;i<nStartPos.length;i++) l8_RA { fA[T5<66 // output.writeLong(nPos); :Z_abKt output.writeLong(fileSplitterFetch.nStartPos); Ir*{IVvej output.writeLong(fileSplitterFetch.nEndPos); +qqCk } "{3|(Qs output.close(); PI,2b(`h_ } Ml{4)%~Y7f catch(IOException e){e.printStackTrace ();} FFmXT/K"/j catch(Exception e){e.printStackTrace ();} ~Ga{=OM?? } A`>^A]% 5~(nHCf> lH@goh //读取保存的下载信息(文件指针位置) `krVfE;_O private void read_nPos() 8YgRJQZ! { 78<fbN5}r try{ oz[G'[\}F DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =}u?1~V int nCount = input.readInt(); i.eMrzJ| nStartPos = new long[nCount]; O'.{6H;t nEndPos = new long[nCount]; S&k/Pc for(int i=0;i<nStartPos.length;i++) oYJ<.Yxeb { cf*~Gx_l nStartPos = input.readLong(); JS<w43/j nEndPos = input.readLong(); Ad>@8^ } $?VYHkX input.close(); 6Bexwf<u } zzh7 "M3Qn catch(IOException e){e.printStackTrace ();} ]gF=I5jn] catch(Exception e){e.printStackTrace ();} w
!<-e> } knb0_nA 9(_n8br1 9#~jlq( private void processErrorCode(int nErrorCode) Y`6<:8[? { Gc5mR9pV System.err.println("Error Code : " + nErrorCode); g?Rq .py]! } MU:v& sk hgwS_L HW'I $ . //停止文件下载 'dv( public void siteStop() 98uMD { w_LkS/ bStop = true; #G?",,&dM for(int i=0;i<nStartPos.length;i++) CWB<I fileSplitterFetch.splitterStop(); |RqCI9N6 +@7c:CAy( B)0;gWK } ,W/Y@ScC } z U*Mk //负责部分文件的抓取 AXnKhYlu **FileSplitterFetch.java (OavgJ+Y */ D$w? package NetFox; -$@'@U Ywcgt| q6%m .X7 import java.io.*; t+^__~IX import java.net.*; @ Yo*h"s 9\kEyb$F= 04}c_XFFE public class FileSplitterFetch extends Thread { Y;dqrA>@ ]~ S
zb nf:wJ-;* String sURL; //File URL 2uF'\y long nStartPos; //File Snippet Start Position {W%XSE long nEndPos; //File Snippet End Position oL!C(\ERh int nThreadID; //Thread's ID 4Yt'I#* boolean bDownOver = false; //Downing is over }?O>.W,/ boolean bStop = false; //Stop identical W* n|T{n FileAccessI fileAccessI = null; //File Access interface /R6\_oM .R@XstQ
}wJH@'0+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0wF)bQv1 { GW7+# this.sURL = sURL; X]\; f this.nStartPos = nStart; E%Ko[G this.nEndPos = nEnd; fj9&J[ nThreadID = id; bz [?M} fileAccessI = new FileAccessI(sName,nStartPos);//定位 BgB0 } 1&Mpx!K*T 58`Dcx,yJ %/_E8GE
public void run() Kv#Q$$)r { `nc=@" 1 while(nStartPos < nEndPos && !bStop) n*#HokX { _U,Hi?b"$} Wi~?2-!
}b{7+ +
Ah try{ +]~}kvk: URL url = new URL(sURL); hxw6^EA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gnf4H
V~ httpConnection.setRequestProperty("User-Agent","NetFox"); ?]+!gz1 String sProperty = "bytes="+nStartPos+"-"; >J:liB|( httpConnection.setRequestProperty("RANGE",sProperty); 8zjJshE/ Utility.log(sProperty); _5OxESE bJeF1LjS Sg\+al7 InputStream input = httpConnection.getInputStream(); SxkY ;^-U //logResponseHead(httpConnection); &7{yk$]* zIr-Rx'dL^ &F'n
>QT9q byte[] b = new byte[1024]; M`)3(|4 int nRead; EQ"+G[j~x while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Z8f?uF { zP|^@Homk nStartPos += fileAccessI.write(b,0,nRead); r*FAUb`bG //if(nThreadID == 1) \(zUI // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^^YP kh6sS } ~ET XXu${I &F*eo`o}6 iWkC:fQz Utility.log("Thread " + nThreadID + " is over!"); N7)K\)DS!z bDownOver = true; 1DH P5q //nPos = fileAccessI.write (b,0,nRead); o}52Qio } c68,,rJO]i catch(Exception e){e.printStackTrace ();} ajf(Ii\/ } Pv*]AF;9pQ } z1.vnGP /38XaKc{6 )vY )Mg //打印回应的头信息 /
w[Tu public void logResponseHead(HttpURLConnection con) yEkwdx5!( { ^pqJz^PO. for(int i=1;;i++) AyOy&]g { _Y)Wi[ String header=con.getHeaderFieldKey(i); =t.T9'{ if(header!=null) Xs~IoU //responseHeaders.put(header,httpConnection.getHeaderField(header)); ih: XC Utility.log(header+" : "+con.getHeaderField(header)); R\x3'([A5 else #f_. break; 02YmV% } XXXQA Y-,C } vu:] [2"0 m.lzkS]P "}S6a?]V public void splitterStop() !';;q { yMpZ-b$*~ bStop = true; \86NV="U } |:L}/onK E+$D$a vLGnLpt } z]&?}o {??bJRT ^3QJv{)Q /* {9cjitl **FileAccess.java zT>BC}~.b *//文件访问(定位,写) lx> ."rW package NetFox; (N9g6V import java.io.*; S.?DR3XLc %{?9#)) }-T,cA_H| public class FileAccessI implements Serializable{ gO m8 O, }q,d JE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 {W=5
J7 RandomAccessFile oSavedFile; )G*xI`(@ long nPos; W<$!H
V$ |FSp`P hV
fANbs public FileAccessI() throws IOException yl0;Jx? { =VV><^uzdY this("",0); y~Mu~/s } 2AEVBkF;M ZzxWKIE'c eYevj[c; public FileAccessI(String sName,long nPos) throws IOException YdN]Tqc { ?.Ip(g oSavedFile = new RandomAccessFile(sName,"rw"); %l!-rXp this.nPos = nPos; ZVrZkd` oSavedFile.seek(nPos); >Sb3]$$ } s@6Jz\<E "/%o'Fq 2WE01D9O public synchronized int write(byte[] b,int nStart,int nLen) 1*.*\4xo { }]=@Y/p int n = -1; L-%'jR try{ m ^w{:\p oSavedFile.write(b,nStart,nLen); w:mm@8N n = nLen; ZKM@U?PK } }T}xVd0 catch(IOException e) :#D~j]pP { as@?
Kv e.printStackTrace (); ex66GJQe1 } xqQK-?k rbl^ aik 8\jsGN.$JZ return n; &=XK:+ } |/n <,X=M6$0n }y vH)q }
[X*u`J bD-OEB B>@l(e)b /* k$>5v +r0 **SiteInfoBean.java Zay%QNsb */ $EzWUt package NetFox; {d.K)8\ 9!.S9[[N #)3 B public class SiteInfoBean { "2p\/VfA whm|"}x)u '*Ld,` private String sSiteURL; //Site's URL }$
Kd-cj+ private String sFilePath; //Saved File's Path CTxP3a9] private String sFileName; //Saved File's Name @uanej0q7 private int nSplitter; //Count of Splited Downloading File |*Oi:)qt p7HLSB2Rp U+C^"[B public SiteInfoBean() M27H{}v {//nSplitter的缺省值为5 u4bVp+ //default value of nSplitter is 5 qh6rMqq this("","","",5); WdB\n/BWB } Ey=}bBx JpxQS~VX 12;YxW>[ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) >8b%*f8R { ) TRUx sSiteURL= sURL; O%haaL\ sFilePath = sPath; c _!!DEe7 sFileName = sName; ;--D?Gs]Qr this.nSplitter = nSpiltter; >(.Y%$9"E .Lu3LVS *z.rOY=
8 } *LuRo 4C;y2`C 9,JWi{lIv public String getSSiteURL() Et0)6^-v { yvnDS"0< return sSiteURL; $PAAmaigi } !Ce!D0Tx .2s^8 g O GLX{EG9Z public void setSSiteURL(String value) E VC]B} { M|zTs\1I sSiteURL = value; !
h92dH } pMAP/..+2 /Z,hQ>/ *aFY+.;U` public String getSFilePath() 29m$S7[ { ^@{"a return sFilePath; *u",-n } ;tF&r1 R[)bGl6# @#$(Cs*{] public void setSFilePath(String value) p1K]m>Y{? { ei{tW3
H$ sFilePath = value; 5&O%0`t } (E,Ibz2G:e 7upWM~H^ yz5! >|EB public String getSFileName() :@eHV=|+> { ) xKW return sFileName; +r9neS.l } Nh}u]<B V!>j:" 9v?@2sOoE public void setSFileName(String value) !2^~ar{2 { WuFBt=% sFileName = value; `w`F-ke]I } 9*huO# _zi| GD 8R:Glif public int getNSplitter() O0s!3hKu { Jb^{o+s53 return nSplitter; 29VX-45 } xplV6q` Wq"-T.i ]f&f_"D public void setNSplitter(int nCount) e+D]9wM8 { IV1Y+Z ) nSplitter = nCount; Dln1 R[ } 9%"`9j~H> } 1uCF9P
ai >tx[UF@P@ SM2N3"\ /* r4DHALu#) **Utility.java qvK/} */ <;O^3_' package NetFox; (DS"*4ty SbzJeaZv )rt%.` public class Utility { SMJRoK3 Li"+` {@3v$W~7M public Utility() E^br-{|{ { h/5S2EB0!O 9 wbQ$>G9 4y?n62N8$ } &/ED.K RqP_^tB //线程睡眠 RyG6_G} public static void sleep(int nSecond) WSN^iDS { 0NKgtH~+ try{ sR[!6[AA Thread.sleep(nSecond); )0ydSz`B } @rDBK] V catch(Exception e) *|<~IQg { wfpl]d! e.printStackTrace (); K~I?i/P=z } dr+(C[= } vt^7:!r sQ,xTWdj //日志 lX)AbK]nb public static void log(String sMsg) !{+.)%d'g { '`.-75T System.err.println(sMsg); v9Sk\9}S } 32?'jRN(ue / o
I 4&W /3K)$Er public static void log(int sMsg) O9/)_:Wdh { .{*l, System.err.println(sMsg); M\ } -!\%##r7~ } P=KhR&gwV~ x<Gjr} NN1}P'6Ha /* D7JrGaF{ **TestMethod.java $u'"C|>8 */ ;UM(y@ package NetFox; S50}]5K
VltM{-k^ 6)ln,{ public class TestMethod { wet[f {c kGo2R]Dd[ 5`+9<8V public TestMethod() >1;jBx>Qy% { ///xx/weblogic60b2_win.exe .UQ|k,,t try{ doHE]gC2Uz SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .%e>>U>F //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); bv'>4a SiteFileFetch fileFetch = new SiteFileFetch(bean); la w$LL fileFetch.start(); kp* ! } JGTsVa2 catch(Exception e){e.printStackTrace ();} SA&(%f1d !ehjLFS? _ 1iLo$ } 2IRARZ,3 ?[m1? |N%
l
at public static void main(String[] args) F[yofRN { <!XunXh new TestMethod(); +6P[TqR } ab%I&B<b } v;9(FLtL 点击下载更多相关资料
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