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/* f&ZxG,]Hi **SiteFileFetch.java E`iT>+LG< */ 9
o-T#~i package NetFox; .pi#Z/v import java.io.*; @p|[7' import java.net.*; phl5E:fIKx 3l`yy])t K,|Gtaa~ public class SiteFileFetch extends Thread { _myam3[W w^p
'D{{ cpFw]w%] SiteInfoBean siteInfoBean = null; //文件信息Bean #TZYe4#f long[] nStartPos; //开始位置 /%Rz`} long[] nEndPos; //结束位置 %I(N FileSplitterFetch[] fileSplitterFetch; //子线程对象 Kdx?s;i long nFileLength; //文件长度 *u
3K8"XZ boolean bFirst = true; //是否第一次取文件 9:fVHynr boolean bStop = false; //停止标志 H=Yl
@ File tmpFile; //文件下载的临时信息 O jE wJ$$ DataOutputStream output; //输出到文件的输出流 ;r^8In@6 0}PW?t76 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #?!)-Q% public SiteFileFetch(SiteInfoBean bean) throws IOException (IIOKx _ {
Cg}cD. siteInfoBean = bean; `B
:Ydf //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H `),PY2 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 6;I&{9 if(tmpFile.exists ()) l]T|QhiVd { Tp)-L0kD_k bFirst = false; jf*M}Q1jHE read_nPos(); bzk@6jR1 } e]uk}#4 else ?%;7k'0" { yew9bn0a= nStartPos = new long[bean.getNSplitter()]; {\;CGoN| nEndPos = new long[bean.getNSplitter()]; `Kpn@Xg } {/XzIOO;b }j+ZF'# 'Xxt[Jy 1W$ @ V! } ~-A5h( >e=tem~/ ;[ pyKh public void run() BtVuI5*h { ::9U5E;! //获得文件长度 Q;)[~p //分割文件 ~U~KUL| //实例FileSplitterFetch #)GL%{Oa //启动FileSplitterFetch线程 $;@^coz9U //等待子线程返回 F.c,F R2 try{ dF5EIPl;J if(bFirst) xs.>+(@|; { ,wlFn nFileLength = getFileSize(); 9Fv1D if(nFileLength == -1) (05/}PhB` { pLDseEr< System.err.println("File Length is not known!"); HP:ee+n } TlQ#0_as[ else if(nFileLength == -2) 7xMvf<1P { ?Z.p.v System.err.println("File is not access!"); r[q-O&2& } PUuxKW} else #[qmhU{s { c/^}
=t( for(int i=0;i<nStartPos.length;i++) ymrmvuh { d2Z5HFtY nStartPos = (long)(i*(nFileLength/nStartPos.length)); U rm&4&y } i'H{cN6 for(int i=0;i<nEndPos.length-1;i++) =XzrmPu { mHM38T9C% nEndPos = nStartPos[i+1]; I
^?TabL } <ZSH1~<{6 nEndPos[nEndPos.length-1] = nFileLength; *l)_&p } $.a<b^.Xi } Mi%i_T^i ylUxK{ :"5i/Cx //启动子线程 -=H*(M fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }rj.N98 for(int i=0;i<nStartPos.length;i++) -+Axa[,5= { lG I1LUo fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), YiJnh47 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !TA6- ]1 nStartPos,nEndPos,i); EcxPbRg Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yS^";$2Tc fileSplitterFetch.start();
GbUw:I } Iojyku\W. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (dd+wx't siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~Z9Eb|B // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \T`InBbf nEndPos = " + nFileLength); _PLY<i2vr // fileSplitterFetch[nPos.length-1].start(); |`+kZ-M* B7zyMh =
NHuj. //等待子线程结束 ##+|zka!U //int count = 0; ]-QY,
k //是否结束while循环 s6bILz-u boolean breakWhile = false; 3=5K7F d[E~}Dq3# YT'G#U1x~ while(!bStop) jd8`D6|Z { dn(I$K8 write_nPos(); Aslh}'$}- Utility.sleep(500); -sO[,
breakWhile = true; Rah"La d3-F?i
5d ]L+YnZ?6 for(int i=0;i<nStartPos.length;i++) yY_(o]k { ~QgyhJM_h= if(!fileSplitterFetch.bDownOver) +Ysm6n ' { !~Vo'ykwx' breakWhile = false; 2;Vss<hR4A break; 5.m&93P } hgIqr^N9 } 1P4cBw% if(breakWhile) BIGln`;,f break; ~puXZCatN URU,&gy= ,;;7+|` //count++; HYcLXh vgu //if(count>4) e_RLKFv7 // siteStop(); 8T6LD } s?Lx\?T s%M# X$*MxMNs System.err.println("文件下载结束!"); O2i7w1t } zs/4tNXw catch(Exception e){e.printStackTrace ();} ot\ FZ } SeuC7!q{ [|iWLPO1&k <PLQY //获得文件长度 C,;T/9 public long getFileSize() YcQ$nZAU { r<'ni int nFileLength = -1; {!RDb'Zp try{ >+,w2m@0 URL url = new URL(siteInfoBean.getSSiteURL()); ')R+Z/hG. HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); E_q/*}]pE httpConnection.setRequestProperty("User-Agent","NetFox"); G5WQTMzf& HQp \0NC] q+iG:B /Z int responseCode=httpConnection.getResponseCode(); pbCj
^ if(responseCode>=400) :1*q}R { DWv(|gO processErrorCode(responseCode); ^b M\:z"M return -2; //-2 represent access is error e
p jb } J`6IH#54 [^Z)f<l R*[X. H String sHeader; #|PPkg%v< @h&:xA56 Ky0}phGRu for(int i=1;;i++) ^fiJxU { _0cCTQE //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7xF)\um //Utility.log(in.readLine()); r'J="^k{ sHeader=httpConnection.getHeaderFieldKey(i); r` B(ucE if(sHeader!=null) ag V z
{ &Fiesi!tET if(sHeader.equals("Content-Length")) M)F_$
ICE- { zqHG2:MN" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); HLe/|x\@< break; zG0]!A } m?<^b_a} } Sj ly] else t[e]AU[} break; ]'NL-8x"> } eo@kn yA<& } PglSQ2P catch(IOException e){e.printStackTrace ();} jn
5v catch(Exception e){e.printStackTrace ();} (*M*muk HNRAtRvnY /[=Yv! Utility.log(nFileLength); S$O5jX 0 "MvSF1 _/czH<
return nFileLength; kwXUjnp } 0 <E2^ ZEp>~dn; XU`ly3! //保存下载信息(文件指针位置) v<Ywfb private void write_nPos()
>akC { ]xkh"j+W try{ "38L ,PW0Z output = new DataOutputStream(new FileOutputStream(tmpFile)); dWx@<(`OC output.writeInt(nStartPos.length); J-|&[-Z
for(int i=0;i<nStartPos.length;i++) ih|;H:"^ { =]r2;014
// output.writeLong(nPos); A<]
$[2qPj output.writeLong(fileSplitterFetch.nStartPos); bv;.6C(T< output.writeLong(fileSplitterFetch.nEndPos); 1V wcJd } hx*4xF output.close(); YQ@2p?4m } G|*&owJ catch(IOException e){e.printStackTrace ();} !F:mDZeY catch(Exception e){e.printStackTrace ();} :?}mu1 } EJP] E) \11+~ %Z+**>1J //读取保存的下载信息(文件指针位置) Kx?.g#>U; private void read_nPos() v}J0j { !PA ><F try{ I94-#*~I DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $|g
; int nCount = input.readInt(); OkAgO3>Y/ nStartPos = new long[nCount]; Z4X, D`s nEndPos = new long[nCount]; #K`0b$ for(int i=0;i<nStartPos.length;i++) #sg*GK+|:R { q9H\ $ nStartPos = input.readLong(); E]v]fy" nEndPos = input.readLong(); ubZJ Um } lX-i <0` input.close(); U {Knjo S } )"?eug}D catch(IOException e){e.printStackTrace ();} |VzXcV-"8) catch(Exception e){e.printStackTrace ();} jU kxA7 }} } 0Vrs bkS d/T&J= \4LTViY] private void processErrorCode(int nErrorCode) 6uv~.-T<l { J>k
6`gw System.err.println("Error Code : " + nErrorCode); ZqdoYU' } /\_n5XI1 0WfnX>(C7R 1hlU
6=Y //停止文件下载 9=j)g public void siteStop() AAs&P+;
{ [Y$TVwFwX bStop = true; `|Hk+V for(int i=0;i<nStartPos.length;i++) >_xuXEslUz fileSplitterFetch.splitterStop(); g1?9ge1 liG|#ny{ g~b$WV% } 5~/EAK` } -)B_o#2=2 //负责部分文件的抓取 DRR)mQBb **FileSplitterFetch.java \@yJbhk */ FF#+d~$z package NetFox; q*4U2_^. AC'_#nPL# a$h^<D
^ import java.io.*; v-SXPL]_^ import java.net.*; Ll-QhcC$ JBLUX, 'e' p`* public class FileSplitterFetch extends Thread { utBrH W;cYg.W2 a;^lOU|L{ String sURL; //File URL {l5fKVb\C long nStartPos; //File Snippet Start Position HzKY2F(, long nEndPos; //File Snippet End Position Y)]C.V,~ int nThreadID; //Thread's ID z6l'v~\ boolean bDownOver = false; //Downing is over x~R,rb
boolean bStop = false; //Stop identical `Fo/RZOW FileAccessI fileAccessI = null; //File Access interface \>pm (gF 0IdA!.| L'S,=NYXY public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "OK[uug { $,]U~7S this.sURL = sURL; T@i*
F M this.nStartPos = nStart; ZAU#^bEQB this.nEndPos = nEnd; qbeUc5`1 nThreadID = id; Y I;iG[T,& fileAccessI = new FileAccessI(sName,nStartPos);//定位 $-Ex
g*i } CYQ)'v ~Ck OiWC0 fglfnx0{ public void run() ![_0GFbT { v\4<6Z:4 while(nStartPos < nEndPos && !bStop) Wh| T3& { ;s{'cN[. ~ gff{Nzk b^C27s try{ =t)qy5 URL url = new URL(sURL); <7F-WR/2n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z:7eroZP httpConnection.setRequestProperty("User-Agent","NetFox"); p> >H$t String sProperty = "bytes="+nStartPos+"-"; 0V>HoH httpConnection.setRequestProperty("RANGE",sProperty); 1u7D:h># Utility.log(sProperty); 2;WbXc!#! .4[3r[ } v:YSG InputStream input = httpConnection.getInputStream(); 1J/'R37lP //logResponseHead(httpConnection); !pw)sO~ ed#fDMXGQ% MkoK(m{7 byte[] b = new byte[1024]; HrvyI)4{ int nRead; [UZr|F
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) f%@~|:G: { r4X}U|s!0 nStartPos += fileAccessI.write(b,0,nRead); o4WQA"VxM //if(nThreadID == 1) reh{jMC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q0VAkVHw4 } r5S/lp+Y+N JOY&YA$U hFv{?v Utility.log("Thread " + nThreadID + " is over!"); Z>g>OPu bDownOver = true; Ge-Bk)6 //nPos = fileAccessI.write (b,0,nRead); )wM%Ul<s } O;<wDh)Yt catch(Exception e){e.printStackTrace ();} 3;BIwb_ } *
&:_Vgu } `hj,rF+4 }^Q:Q\ %5gdLm!p //打印回应的头信息 bp:`m>4< public void logResponseHead(HttpURLConnection con) F5
]<=i { z eT`kZ for(int i=1;;i++) lEFd^@t { Mi8)r_l%O String header=con.getHeaderFieldKey(i); f_S$CFa@ if(header!=null) bKCE;Wu:G //responseHeaders.put(header,httpConnection.getHeaderField(header)); -[-oz0`Sl{ Utility.log(header+" : "+con.getHeaderField(header)); `w:kY9
else H
u;"TG break; 1 6zxPSTr} } -| m3=# } !\7`I}: B~KxUp V'XEz;Ze public void splitterStop() O0qG
6a { bzNnEH`^] bStop = true; R}0gIp= } dRJ
](Gw H<_Tn$<zH. 4<#ItQ( } ;pW8a? )_jboaNzwI KNAvLcg /* rc8HZ **FileAccess.java ~{Iw[,MJ *//文件访问(定位,写) -iDs:J4Iq package NetFox; (WT\HR import java.io.*;
+x
3x ]XEyG7D 1YV1Xnn, public class FileAccessI implements Serializable{ 6LDZ|K@ JU>~[yAP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :b44LXKCP RandomAccessFile oSavedFile; 71nZi`AR long nPos; m0bxVV^DK! Mgw#4LU 1$T`j2s public FileAccessI() throws IOException .z,-ThTH@\ { yQrgOdo,w this("",0); %" H:z } /+92DV ,"`20.Lv *U1*/Q. public FileAccessI(String sName,long nPos) throws IOException o!BCR: { b/UXO$_~- oSavedFile = new RandomAccessFile(sName,"rw"); R@3HlGuRKw this.nPos = nPos; @o0HDS oSavedFile.seek(nPos); \7LL neq } ([q>.[WbH] UmVn: a )jL@GW public synchronized int write(byte[] b,int nStart,int nLen) nN{DO:_o { bW
W!,-|R int n = -1; g&g:HH: try{ QgU]3`z" oSavedFile.write(b,nStart,nLen); |^ 8ND#x n = nLen; _K9PA[m5~ } ^N<aHFF catch(IOException e) GhfhR^P { Ja3#W
K e.printStackTrace (); i`@cVYsL } oqwW MlWKfe< jF;<9-m& return n; \*CXXp` } ??nT[bhQ w]MI3_|'r( 2tK~]0x }
n/;{- -btNwE6[. BPkMw'a: /* jW#dUKS( **SiteInfoBean.java ;0WAfu}#H */ |h $Gs2 package NetFox; =&pR=vl
%t_'rv LeN }Q public class SiteInfoBean { E~q3o* ~*EipxhstJ 1R-0b{w[ private String sSiteURL; //Site's URL eW.qMx#:od private String sFilePath; //Saved File's Path ;L87
%P(. private String sFileName; //Saved File's Name 60~*$` private int nSplitter; //Count of Splited Downloading File MkVv5C }%wP^6G*x\ 7Z]?a public SiteInfoBean() Z=-#{{bv {//nSplitter的缺省值为5 9hK8dJw //default value of nSplitter is 5 d3E N0e+^ this("","","",5); Onqapm0 } gm]q<~eMW @B{ +q2\3REzx public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) o$bQ-_B` { mK M[[l&A sSiteURL= sURL; 2O(k@M5E? sFilePath = sPath; br0\O sFileName = sName; f(}&8~ & this.nSplitter = nSpiltter; d+P<ce2G T:Q+ Z }v+ 0F!Uai1 } sfG9R" :zC=JvKT X%!?\3S public String getSSiteURL() !K_<7iExI\ { :;#^gvH return sSiteURL; #\F8(lZ } d?U,}tv :'t"kS 8oHIXnK public void setSSiteURL(String value) %xx;C{g;a { Qmd2C&Xw sSiteURL = value; ~Gg19x.#uW } "
d~M\Az KPK`C0mg@k V!e`P public String getSFilePath() bMqS:+ { M(^IRI- return sFilePath; D_f:D^ } y#ON=8l 50S*_4R T/L\|_:' public void setSFilePath(String value) /KiaLS { ojWf]$^y} sFilePath = value; N:^4OnVR } 1{xkAy0 A[88IMZs -RThd" public String getSFileName() sQzr+]+#9 { mh_GYzd return sFileName; '~6l
6wi } DqH]F S?] |Pse=_i Fw#wVs)@: public void setSFileName(String value) n
u>6UjV { +zFEx%3^ sFileName = value; KC\W6|NtGj } y3 S T"U (n{!~'3 1 rmN) public int getNSplitter() zy9W{{:P(1 { >F!X'#Iv return nSplitter; na/,1iI< } XOY\NMo
PurY_ QRY7ck:N public void setNSplitter(int nCount) 6;\Tps;A { Of$gs- nSplitter = nCount; fVBu?<=d } %t-}dC& } QTI^?@+N> %aJ8wYj*
]O68~+6 /* qB=%8$J **Utility.java }l@7t&T| */ ]FO)U package NetFox; fPsUIlI/A E'_$?wWn5 ^$\#aTyFK public class Utility { yi1V \8DC oO,"B8a \E:l
E/y public Utility() BO=j*.YKy { u!VY6y7p F|W(_llfM wo!;Bxo
N } h|&qWv q"^T}d d, //线程睡眠 qgLj^{ public static void sleep(int nSecond) [U?a %$G> { 5},kXXN{+ try{ ,n+~S^r Thread.sleep(nSecond); +QVe - } |h1Y3 catch(Exception e) 2JRX ;s~ { wrt^0n'r)c e.printStackTrace (); XB-l[4? } }>u<, } 9l9|w4YJs 5 l(Q#pSX //日志 *6%r2l'kZ public static void log(String sMsg) CpF&Vy K { rY&Y58./ System.err.println(sMsg); e!~x-P5M` } /WKp\r(Hp %]i("21 /SZg34% public static void log(int sMsg) -( ,iwFb { q+-Bl System.err.println(sMsg); gcfEJN4' } m2$Qp{C6H } V|8`]QW@ BWN[>H %S ,d34v*U /* l6EDl0~r **TestMethod.java v(tr:[V */ p#95Q package NetFox; \hwz;V.J" C7[CfcPA m^)h/s0A public class TestMethod { o!+jPwEU MzsDDP+h qrmJJSJ public TestMethod() ?0VLx,kp { ///xx/weblogic60b2_win.exe M(2c{TT try{ a~F`{(Q2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); n3kYVAgF //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); iE$/ Rcp SiteFileFetch fileFetch = new SiteFileFetch(bean); !Z6GID})p fileFetch.start(); >@BvyZ)i } L@{5:#- catch(Exception e){e.printStackTrace ();} &<P!o_+eb >Cjb|f3'i} G*|2qX"o } 3wBc`vJ! Y`u.P(7# <eq93 public static void main(String[] args) =y/VrF.bV { r$*p new TestMethod(); <,Zk9 t& } dB`YvKr# } j/R 点击下载更多相关资料
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