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/* C_}]`[ **SiteFileFetch.java HmGWht6R */ oq
Xg package NetFox; {3mRq"e import java.io.*; EH J.T~X import java.net.*; ( Y[Q, :D5Rlfj L\J;J%fz. public class SiteFileFetch extends Thread { ,f%S'(>w ~g]Vw4pv I3L<[-ZE SiteInfoBean siteInfoBean = null; //文件信息Bean zFfr.g;L long[] nStartPos; //开始位置 8b&/k8i: long[] nEndPos; //结束位置 _`j7clEz FileSplitterFetch[] fileSplitterFetch; //子线程对象 w,.TTTad long nFileLength; //文件长度 e8a+2.!&\ boolean bFirst = true; //是否第一次取文件 y'.p&QH'` boolean bStop = false; //停止标志 sUO`u qZV File tmpFile; //文件下载的临时信息 z\W64^'"Z DataOutputStream output; //输出到文件的输出流
=4YhG;% A:%`wX} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -l*|M(N\ public SiteFileFetch(SiteInfoBean bean) throws IOException &jJL"gq" { \;Biq` siteInfoBean = bean; F0TB<1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); AO4U}? tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,?%Zc$\LW if(tmpFile.exists ()) m.rmM` { +Mb.:_7' bFirst = false; l_d5oAh
read_nPos(); _
]ipajT } & '`g#N else F v2-( { "%w u2%i nStartPos = new long[bean.getNSplitter()]; s/#!VnU6 nEndPos = new long[bean.getNSplitter()]; m+[Ux{$ } c7k~S-nU H/
HMm{4 NH4# =&]g "a' } rglXs b2Fe<~S{ U?Zq6_M& public void run() }o(-=lF { PJ%C N(0 //获得文件长度 kVMg 1I@ //分割文件 &U#|uc!+ //实例FileSplitterFetch QZ //启动FileSplitterFetch线程 YK'<NE3 4 //等待子线程返回 n b?lTX~ try{ +7.',@8_V if(bFirst) BX7kO0j { Cl7xt}I nFileLength = getFileSize(); T.BW H2gRP if(nFileLength == -1) zTSTEOP}%Y { 6%_nZvRv System.err.println("File Length is not known!"); IOmfF[ } .t!x<B else if(nFileLength == -2) ]w8(&,PP { FcU SE System.err.println("File is not access!"); R__OP`! } R&k<AZ else \ Gvm9M { 8Fu(Ft^9 for(int i=0;i<nStartPos.length;i++) .Yn_*L+4* { kn4`Fa;)O nStartPos = (long)(i*(nFileLength/nStartPos.length)); g8% &RG } #q=Efn' for(int i=0;i<nEndPos.length-1;i++) +a+Om73B2 { ^hM4j{|&M nEndPos = nStartPos[i+1]; *.t7G } .W!i7 nEndPos[nEndPos.length-1] = nFileLength; (hbyEQhF } *^ZV8c} } V**~m9f VU3upy< Why`ziks //启动子线程 YU'E@t5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; sUQ@7sTj for(int i=0;i<nStartPos.length;i++) @#l= l { hHnYtq fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), d\8l`Krs[_ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9W2Vo [( nStartPos,nEndPos,i); x'<X!gw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '\iCP1>+S fileSplitterFetch.start(); "+G8d'%YV } W^l-Y%a/o // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oZ|\vA%4^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); z<?)Rq" // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )jP1or nEndPos = " + nFileLength); S.NPZ39}ZE // fileSplitterFetch[nPos.length-1].start(); 2c*GuF9(0 x s|FE3:a h S&R(m //等待子线程结束 +cN8Y}V //int count = 0; .aQ \jA //是否结束while循环 1mG-} boolean breakWhile = false; 2P0*NQ vl:KF7:#m @\#td5' while(!bStop) ZUd-<y { r;N|) write_nPos(); u'BaKWPS Utility.sleep(500); 4|?;TE5 breakWhile = true; 1=V-V< h2d(?vOT VMWf>ZU for(int i=0;i<nStartPos.length;i++) wnC81$1l~ { S<Xf>-8w if(!fileSplitterFetch.bDownOver) &%J08l6 { UJ
breakWhile = false; <RL] break; %EB/b } /%^#8<=|U } 4Fr
if(breakWhile) >z@0.pN]7 break; jse&DQ S)@j6(HC4 sXFZWj}\ //count++; Cw&KVw* //if(count>4) xJ.M;SF4 // siteStop(); utV_W& } 0</);g} ,z=LY5_z) Qo|\-y-# System.err.println("文件下载结束!"); PCtzl) } *s3/!K catch(Exception e){e.printStackTrace ();} 7@W>E;go } X"eYK/7 {+>-7
9b cw
<l{A //获得文件长度 4o5t#qP5$S public long getFileSize() Jln:`!#fDf { j#4kY R{ int nFileLength = -1; o ^uA">GH try{ ^U/O!GK URL url = new URL(siteInfoBean.getSSiteURL()); u=e{]Ax#} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N8df8=.kw httpConnection.setRequestProperty("User-Agent","NetFox"); $[ *w"iQ ,I;>aE<# ;!Fn1|) int responseCode=httpConnection.getResponseCode(); ,eS)e+yzc2 if(responseCode>=400) "\yT7?}, { 2GG2jky{/ processErrorCode(responseCode); zfdl45 return -2; //-2 represent access is error VUuE T } 2&cT~ZX&' m9;SrCN_ v`T
c}c ' String sHeader; qf-8<{T )boE/4 -mh3DhJ, for(int i=1;;i++) 'V>-QD%1 { (/$^uWj //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); RxQ * //Utility.log(in.readLine()); E"IZ6)Q sHeader=httpConnection.getHeaderFieldKey(i); Dw"\/p:-3 if(sHeader!=null) ;n;p@Uu[
b { Q/Rqa5LI: if(sHeader.equals("Content-Length")) h{qgEIk& { +b6v!7_ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); yB!dp;gM{ break; |I=T@1_D } -yg7;ff } `WS&rmq&' else
v"0J&7!J break; DHRlWQox } -Lg
Ei3m } dc'Y`e catch(IOException e){e.printStackTrace ();} izR"+v catch(Exception e){e.printStackTrace ();} ~}Pfu P$,Ke< [#iz/q~} Utility.log(nFileLength); |uJ%5y# Dha1/g1q ~$J2g return nFileLength; ia?
c0xL } B)UZ`?>c w32y3~ RM/ 0A| //保存下载信息(文件指针位置) fN2lLn9/u private void write_nPos() CvdN"k { -:rUw$3J try{ wuo,kM output = new DataOutputStream(new FileOutputStream(tmpFile)); 8FhdN output.writeInt(nStartPos.length); iURe( [@ for(int i=0;i<nStartPos.length;i++) B-mowmJ3dg { }-2|XD%] // output.writeLong(nPos); |':{lH6+1 output.writeLong(fileSplitterFetch.nStartPos); Y4YJJYvD output.writeLong(fileSplitterFetch.nEndPos); .RL=xb|[ } {4PwLCy output.close(); 9tnD=A<PS } !n%j)`0M catch(IOException e){e.printStackTrace ();} D6Wa.,r catch(Exception e){e.printStackTrace ();} 2&5K.Ui% } H,NF;QPPC rT>wg1: Alq(QDs //读取保存的下载信息(文件指针位置) qxj(p o private void read_nPos() "Y.y:Vv; { p
K$`$H try{ (tO\)aS= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8?C5L8) int nCount = input.readInt(); (-co. nStartPos = new long[nCount]; 5-A\9UC*@ nEndPos = new long[nCount]; _VXN#@y for(int i=0;i<nStartPos.length;i++) "gwSJ~:ds { *K;~!P nStartPos = input.readLong(); -n;}n:wL nEndPos = input.readLong(); J~- 4C) }
AOx[ input.close(); "Yy n/ } t`QENXA} catch(IOException e){e.printStackTrace ();} Bbp|!+KP{( catch(Exception e){e.printStackTrace ();} TsZ@ } LH6vLuf =BrRYA _
x*3PE private void processErrorCode(int nErrorCode) >R=|Wo`Ri { Mb=" Te>| System.err.println("Error Code : " + nErrorCode); fXB0j;A } Vw"\{` tf G@&&%9 fc@A0Hf //停止文件下载 13wE"- public void siteStop() 048kPXm` { XX~,>Q}H= bStop = true; ch]29 for(int i=0;i<nStartPos.length;i++) wyG;8I fileSplitterFetch.splitterStop(); yDS4h(^ nRY5xRvK .wr>]yN } nj4/#W } dqAw5[qMJ //负责部分文件的抓取 eDB ;cN **FileSplitterFetch.java -{A<.a3P}= */ J8D,ZfPN`d package NetFox; o" SMbj xezcAwW 92-I~
!d import java.io.*; FPTK`Gd0 import java.net.*; |K~Nw&rZ] mVmGg, xLn%hxm?, public class FileSplitterFetch extends Thread { 'f|o{ A\;U3Zu ET >](l9 String sURL; //File URL :H[6Lg\* long nStartPos; //File Snippet Start Position Aa]" long nEndPos; //File Snippet End Position U<-D(J int nThreadID; //Thread's ID 8r!zBKq2~ boolean bDownOver = false; //Downing is over k_R"CKd boolean bStop = false; //Stop identical F<w/PMb FileAccessI fileAccessI = null; //File Access interface bjS{( LIdF 0 h1(4Ic public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Np)lIGE { :i7;w%B this.sURL = sURL; =qIyqbXz this.nStartPos = nStart; )_NO4`ejs/ this.nEndPos = nEnd; Q7A MRrN nThreadID = id; Vq2$'lY fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;=UsAB] } -%dCw6aX+ {_dvx*M A(0lM`X public void run() fn!KQ`,# { 4`R(? while(nStartPos < nEndPos && !bStop) _tXlF; { %%wNZ{ M@ZI\ KG5>]_GH try{ ]s748+ URL url = new URL(sURL); lHIM}~#;nd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9k=3u;$v httpConnection.setRequestProperty("User-Agent","NetFox"); b u"!jHPB String sProperty = "bytes="+nStartPos+"-"; a'z7(8$$ httpConnection.setRequestProperty("RANGE",sProperty); ~v"L!=~G;a Utility.log(sProperty); 1i] ^{;] W}1
;Z(.* Tb-F]lg$ InputStream input = httpConnection.getInputStream(); .}*"Nv //logResponseHead(httpConnection); UY2O Z&& 2Hv+W-6v yiI1x*^ byte[] b = new byte[1024]; >"<Wjr8W!$ int nRead; 3yXY.>' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) EZ`{Wnbq { RX5dO% nStartPos += fileAccessI.write(b,0,nRead); s|ITsz0,td //if(nThreadID == 1) b_):MQ1{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xP,hTE } YgoBHE0# FsryEHz 188*XCtjQ9 Utility.log("Thread " + nThreadID + " is over!"); I`p;F!s bDownOver = true; as_PoCoss //nPos = fileAccessI.write (b,0,nRead); C6yuX\ } eR" <33{ catch(Exception e){e.printStackTrace ();} BF <ikilR } Z(!\%mn } @ry_nKr9 2 Vrw 1'\/,Es //打印回应的头信息 IaXeRq?< public void logResponseHead(HttpURLConnection con) .6'qoo_N { tnG# IU
* for(int i=1;;i++) pHJ3nHLQ { 6K<K String header=con.getHeaderFieldKey(i); Tu 7QCr5* if(header!=null) r>U@3%0& //responseHeaders.put(header,httpConnection.getHeaderField(header)); O8.5}>gDn. Utility.log(header+" : "+con.getHeaderField(header)); ia 73?*mXT else 3%ZOKb"D* break; m%e68c } t<viX's } VU d\QR- W#sU`T
# Vha7 public void splitterStop() I.k
*GW { .VzT:4-<Q" bStop = true; 1y4 } <A'$%`6m 0_t`%l= 8*T=Xei8 } E+w<RNBmz `^y7f n=ux5M /* 5[u]E~Fl} **FileAccess.java xUistwq *//文件访问(定位,写) Vy,DN~ag package NetFox; hfy_3} _ import java.io.*; "6?0h[uff {jX2} J6aef^> public class FileAccessI implements Serializable{ 3kMf!VL FG*r'tC~r //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Np0u,t%vs RandomAccessFile oSavedFile; q#=(e:aCb long nPos; 5N&?KA- J~UuS+Ufv Tyf`j,= public FileAccessI() throws IOException Eg3q!J&Z { C-[eaHJ'$ this("",0); 'u b@]ru| } $'hEz/ OH(waKq2I +&2%+[nBZ public FileAccessI(String sName,long nPos) throws IOException %n: k# { b`O'1r\Y; oSavedFile = new RandomAccessFile(sName,"rw"); d4c8~L
H- this.nPos = nPos; nK%LRcAs oSavedFile.seek(nPos); QW(Mz Hg } }@+:\ ~1vDV>dpE [^98fAlz6 public synchronized int write(byte[] b,int nStart,int nLen) 7Da` { }2<7%FL int n = -1; SJ>vwmA4 try{ d,n 'n oSavedFile.write(b,nStart,nLen); [e}]}t8m n = nLen; Y\?"WGL)p } >e[i5 catch(IOException e) (jl
D+Y_ { 6MMOf\
e.printStackTrace (); BeoDKdAwY } JHTSUq Hn+~5@. !NvI:C_4| return n; l3I:Q^x@ } r:ptQo`1- >_"an~Ss |Uh } "]b<uV X=fYWj[H, +Kbjzh3<wG /* O5nD+qTQ# **SiteInfoBean.java 9H`XeQ. */ |_aa&v~ package NetFox; GH:jH]u!V ]R f[y \$T(t/$9 public class SiteInfoBean { T&u5ki4NE Doyx[zZ qm8B8&- private String sSiteURL; //Site's URL Cl8Cg~2 private String sFilePath; //Saved File's Path fN^8{w/O
private String sFileName; //Saved File's Name \B,@`dw private int nSplitter; //Count of Splited Downloading File iE^84l68 G.a b ql h-<81"}j1 public SiteInfoBean() dufu|BL|} {//nSplitter的缺省值为5 Ata:^qI //default value of nSplitter is 5 :hk5 .[ this("","","",5); Y;^l%ePuW } d K3*; %^GfS@t ARwD~Tr public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) HjD8u`qQ { hxd`OG<gF sSiteURL= sURL; Eq9x2 sFilePath = sPath; ;m{1_ 1 sFileName = sName; BdblLUGK# this.nSplitter = nSpiltter; cZU=o\ k(7&N0V%zz lKp"xcAD } .P%bkD6M YdC6k?tzS Nk VK public String getSSiteURL() 4`]^@"{ { ]i ,{ return sSiteURL; D_^
nI: } VfC <WVYiZ A:N|\Mv2b O6a<`]F public void setSSiteURL(String value) ]]9R mh= { $f=J2&D,Cz sSiteURL = value; {xB!EQ" } f:|1_ j 6J6BF% .A{tQ1&_ public String getSFilePath() QIvVcfM^ { hl (hJfp return sFilePath; BmMGx8P } 6x[}g A _
N;
ZC`wO%, public void setSFilePath(String value) %wvdn { yyRiP|hJ sFilePath = value; '(yAfL 9} } g:D>.lKd |[ k.ii6iO ~>Fu5i $i public String getSFileName() L Mbn { i8[t=6Rm@ return sFileName; 0gy/:T } %D}kD6= |w1Bq FR4QUk public void setSFileName(String value) D4-ifsP { JG!mc7 sFileName = value; Cc' 37~6~P }
+wvWwie G"U9E5O 7>Ouqxh21 public int getNSplitter() K'Tm_"[u { kmsb hYM) return nSplitter; eH3JyzzP, } &5spTMw8 O-~7b(Z &<5zqsNJ\a public void setNSplitter(int nCount) wh\}d4gN { 2"kLdD nSplitter = nCount; YY((V@|K } 7BjJhs } (Hz^)5(~ ZaDyg"Tw+ # 448-8x /* C] eSizS. **Utility.java '}JhzKNj */ X!Mx5fg package NetFox; B=yqW N^ds
RYC V>)OpvoT# public class Utility { Vb4#, o]` *M| 4(~L#}:r! public Utility() .TR9975 { 7he,?T)vD `H_ 3Uc f/NH:1)y } be{H$9' 3n1;G8Nf //线程睡眠 "XKy#[d2 public static void sleep(int nSecond) m
)zUU { #`iB`| try{ .hP D$o Thread.sleep(nSecond); ARVf[BAJ-* } 2d(e:rh] catch(Exception e) w d^': { ;%5N%0, e.printStackTrace (); YTpSHpf@ } ia~HQ$'+n } KB,j7
~V ;|5F[ //日志 zh`<WN&H public static void log(String sMsg) wj<6kG { Eh;'S"{/?j System.err.println(sMsg); # E^1|: } fue(UMF~ SSg8}m5)Q }6}l7x public static void log(int sMsg) E7 Ul;d
{ '&R2 U_ System.err.println(sMsg); @= Uh',F } i2A81>68< } A*R^n}sh |y#
Jx *74MWF@IY /* v
~?qz5:K~ **TestMethod.java o&zJ=k[4 */ cAqLE\h package NetFox; fZzoAzfv2 KKPh~ThC E`0? public class TestMethod { C8:f_mJU r1m]HFN '8.r-`l( public TestMethod() o>i4CCU+ { ///xx/weblogic60b2_win.exe #u(^0'
P try{ ]G=L=D^cK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \fr~ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); IH&|Tcf\ SiteFileFetch fileFetch = new SiteFileFetch(bean); 7P5)Z-K[ fileFetch.start(); Rz:]\jcIT/ } gHEu/8E catch(Exception e){e.printStackTrace ();} Ugt/rf5n gNrjo= [{,T.;'<j } Apag{Z]^B L>NL:68yN 9r<J"%*Q public static void main(String[] args) x8\?}UnB { y`5
9A new TestMethod(); Jr!JHC9i } D~iz+{Q4 } Uh4%}-; 点击下载更多相关资料
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