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/* %98' @$:0 **SiteFileFetch.java 0`.^MC? */ m42T9wSsx package NetFox; ^2d!*W| import java.io.*; AT2v!mNyCw import java.net.*; %:>3n8n Sw^X2$h 65z" public class SiteFileFetch extends Thread { ^
&E}r{? kp?w2+rz :.(;<b<\ SiteInfoBean siteInfoBean = null; //文件信息Bean OJT1d-5p long[] nStartPos; //开始位置 YzosZ! L!< long[] nEndPos; //结束位置 dpQG[vXe FileSplitterFetch[] fileSplitterFetch; //子线程对象 { pu85'DV long nFileLength; //文件长度 4${jr\q] boolean bFirst = true; //是否第一次取文件 ~DO4, boolean bStop = false; //停止标志 tMj;s^P1 File tmpFile; //文件下载的临时信息 s,bERN7'yO DataOutputStream output; //输出到文件的输出流 j.a`N2]WE jA".r'D% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ZnFi<@UB) public SiteFileFetch(SiteInfoBean bean) throws IOException W{z.?$SH { G6VF>2 siteInfoBean = bean; &<zd.~N" //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gh`m*@ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); `&0Wv0D0 if(tmpFile.exists ()) ]v[|B { T|&[7%F3" bFirst = false; 6cqP2!~ read_nPos(); bNT9 H`P } l1ZY1#%j else PcB_oG g { f>BWG` nStartPos = new long[bean.getNSplitter()];
F4=}}kU nEndPos = new long[bean.getNSplitter()]; |+ N5z } ) 9, ys_`e B1]bRxwn? zYXV; } vVGDDDz/ _%'},Xd.z gTRF^knrY public void run() '
|-JWH { wf,7== //获得文件长度 '=][J_ //分割文件 ~['Kgh_; //实例FileSplitterFetch /iG*)6*^k //启动FileSplitterFetch线程 Gm*X'[\DD //等待子线程返回 1[_mEtM:]B try{ w\)| if(bFirst) oJ#,XMKga { at2FmBdu C nFileLength = getFileSize(); UR:aD_h if(nFileLength == -1) m*e{\)rd# { zy*/T>{# System.err.println("File Length is not known!"); -}K<ni6 } 9&<x17' else if(nFileLength == -2) B|o2K}%f { BL@:!t System.err.println("File is not access!"); #plY\0E@ } JNcYJ[wqv else VDTcR { KfF!{g f for(int i=0;i<nStartPos.length;i++) lRh9j l { Uye|9/w8 ! nStartPos = (long)(i*(nFileLength/nStartPos.length)); S/;bU: } 9Fn\FYUq for(int i=0;i<nEndPos.length-1;i++) Dk48@`l2 { V I%
6.6D nEndPos = nStartPos[i+1]; U]a*uF~h } ){jla,[ nEndPos[nEndPos.length-1] = nFileLength; 8Lw B
B } m N8pg4 } F R|&^j6 ~
T>U phO;c;y} //启动子线程 E*i#?u fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _X?^Cy for(int i=0;i<nStartPos.length;i++) ctcS:<r/3@ { V|\7')Qq fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qZ@s#UiB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), @k&qb!Qah nStartPos,nEndPos,i); GfC5z n> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6'xsG?{JY fileSplitterFetch.start(); N&@}/wzZ } gv5*!eI // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q_l'o3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !ct4;.2
D // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", I-OJVZ( V nEndPos = " + nFileLength); a22XDes= // fileSplitterFetch[nPos.length-1].start(); q+,Q<2J Jmx Ko+- 4@xE8`+bG //等待子线程结束 1?Z4K/ //int count = 0; ;;&}5jcV //是否结束while循环 hlt[\LP=$ boolean breakWhile = false; n_'{^6*O S6fb f>[ Uix6GT; while(!bStop) Z0l+1iMx { K_&4D' write_nPos(); QY= = GfHt Utility.sleep(500); Y3Q9=u*5 breakWhile = true; 4j)tfhwd8 aMTu-hA Agrk|wPK for(int i=0;i<nStartPos.length;i++) \6\<~UX^ { qP<Lr)nUH if(!fileSplitterFetch.bDownOver) v0L\0&+ { &c1A*Pl/:G breakWhile = false; dO%W+K break; 7 [0L9\xm } sJNFFOz } $ MC)}l if(breakWhile) 5atYOep break; 8_N]e'WUh ;| 1$Q!4 $8BPlqBIZ //count++;
O#I1V K //if(count>4) z;y:9l // siteStop(); 3po:xMY } IsR!'%Pu !W?gR.0$= Kv~U6_=1O System.err.println("文件下载结束!"); _o8?E&d } o=1X^, catch(Exception e){e.printStackTrace ();} /&4U6a } X]y)qV)a[c ={u0_j
W u(G*\<z- //获得文件长度 W5R\Q,x6 public long getFileSize() }u1O#L}F5 { MHa#?Q9 int nFileLength = -1; NF?
vg/{ try{ CD8}I85K URL url = new URL(siteInfoBean.getSSiteURL()); mx=BD' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vhhC>
7 httpConnection.setRequestProperty("User-Agent","NetFox"); h yv2SxP* 2PG [7u^ "Iix
)Ue int responseCode=httpConnection.getResponseCode(); g&{9VK6. if(responseCode>=400) =z8f]/k*> { i7ly[6{^pr processErrorCode(responseCode); VH:]@x//{ return -2; //-2 represent access is error Od|$Y+@6 } #^]n0! mml
z&h x,'!eCKN String sHeader; z<5m
fAm =Qn ;_+Ct $.bBFWk for(int i=1;;i++) Qa.uMq { &y#r;L<9 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /soKucN"h //Utility.log(in.readLine()); @$z<i `4 sHeader=httpConnection.getHeaderFieldKey(i); &
GreN if(sHeader!=null) 1m .W< { 'g{9@PkGn if(sHeader.equals("Content-Length")) e zOj+vz { }[xs~!2F nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); <'g:T(t break; Sr?#S } JwXT%op9RP } `[n("7, else %$DI^yS break; =yy5D$\ } 9`9R!=NM } h*<P$t catch(IOException e){e.printStackTrace ();} wKsT7c' catch(Exception e){e.printStackTrace ();} ki)#d'
} w[ ~#av9 6VhjJJ Utility.log(nFileLength); [0D
Et _(KbiEB{ 3@]SKfoo1 return nFileLength; >i6yl5s } 9WR6!.y#f &%/7E_j7 b2FO$Os //保存下载信息(文件指针位置) gatB QwJb9 private void write_nPos() cA:*V|YV` { mbueP.q[? try{ >&U,co$> output = new DataOutputStream(new FileOutputStream(tmpFile)); pn^ d]rou? output.writeInt(nStartPos.length); rX1QMR7? for(int i=0;i<nStartPos.length;i++) nt@aYXK4| { T|TO }_x // output.writeLong(nPos); +="e]Yh; output.writeLong(fileSplitterFetch.nStartPos); |u ;v27 output.writeLong(fileSplitterFetch.nEndPos); qQH]`#P } @qHNE,K output.close(); 6!(@@^7{* } ~b2wBs)r catch(IOException e){e.printStackTrace ();} ,zT y?OQ catch(Exception e){e.printStackTrace ();} (zFi$ } k Zq!& &EnuE0BD ^) s2$A:L //读取保存的下载信息(文件指针位置) L{`JRu private void read_nPos() E)fglYWs2 { s91JBP|B7 try{ UMcgdJB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); z.I9wQ]X[ int nCount = input.readInt(); /n8B,-Z5s5 nStartPos = new long[nCount]; '3 ^+{=q nEndPos = new long[nCount]; RnDt)3 for(int i=0;i<nStartPos.length;i++) 5O6hxcMjT { Dv/WE>?Aw nStartPos = input.readLong();
D N*t~Z3[ nEndPos = input.readLong(); eh5gjSqx } 0p\@!Z H input.close(); I2nhqJy^ } I'0@viF"Nx catch(IOException e){e.printStackTrace ();} qC?:*CXH catch(Exception e){e.printStackTrace ();} b 'pOJS } J>bJ
449B UCClWr Z LD}a:s private void processErrorCode(int nErrorCode) >:|q&|x- { >#y^;/bb System.err.println("Error Code : " + nErrorCode); bAm(8nT7w } EB8\_]6XJ 1[vi. oTuOw|[ //停止文件下载 .?Gd'Lp public void siteStop() #gcF"L|| { =Yt
R` bStop = true; #*(td<Cp for(int i=0;i<nStartPos.length;i++) 5EebPXBzB fileSplitterFetch.splitterStop(); $+I;oHWI ^~A>8CQOU bG(3^"dS } AlIpsJ[UU } Q(oN/y3, //负责部分文件的抓取 y7i*s^ys{ **FileSplitterFetch.java K]9"_UnN */ k4[|'Dk? package NetFox; d$Pab* 2FW\O0U oczN5YSt import java.io.*; `6xkf&Kt import java.net.*; lh;:M-b9 gjAIEI ixT:)|'i public class FileSplitterFetch extends Thread { SK#(#OQoh W!>.$4Q9 u[
Yk String sURL; //File URL 6gs01c,BA long nStartPos; //File Snippet Start Position
#c66) long nEndPos; //File Snippet End Position |YY_^C`"- int nThreadID; //Thread's ID ]f({`&K5 boolean bDownOver = false; //Downing is over ]&pds\ boolean bStop = false; //Stop identical M!XsJ<jN/ FileAccessI fileAccessI = null; //File Access interface z=3\Ab -#HA"7XOE sH[ROm public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException u!W0P6 { M%kO7>h8 this.sURL = sURL; Oz%>/zw[h this.nStartPos = nStart; X'qU*Eo this.nEndPos = nEnd; jmFz51 nThreadID = id; l|k`YC x fileAccessI = new FileAccessI(sName,nStartPos);//定位 4Q6mo/=H } &?yZv{ \hEN4V[ o_^?n[4 public void run() `I,,C,{C { n*{sTT while(nStartPos < nEndPos && !bStop) <t
\H^H! {
N#a$t& D5*q7A6 LB a[:j2 try{ 3 C<L URL url = new URL(sURL); cZ2kYn8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [CXrSST")E httpConnection.setRequestProperty("User-Agent","NetFox"); ?3.b{Cq{- String sProperty = "bytes="+nStartPos+"-"; j?x>_#tIY httpConnection.setRequestProperty("RANGE",sProperty); +yD`3`
E Utility.log(sProperty); <,e+
kL{ v63"^%LX ?I~()]k5 InputStream input = httpConnection.getInputStream(); <y NM%P<Oy //logResponseHead(httpConnection); V13N}] 70Wgg ty ?1K#dC52# byte[] b = new byte[1024]; vbC\?\_ int nRead; W1|0Yd ;P while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) K#=*9S { EH!
q=&d nStartPos += fileAccessI.write(b,0,nRead); < F.hZGss7 //if(nThreadID == 1) 3GhRWB-U // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !~rY1T~ } NP/Gn6fr f m)pulz 'g
m0) r Utility.log("Thread " + nThreadID + " is over!"); A"G
1^8wvX bDownOver = true; ^Uf]Q$uCjE //nPos = fileAccessI.write (b,0,nRead); G'ei/Me6{ } [Q/TlO t5 catch(Exception e){e.printStackTrace ();} ov_j4j>6P } j;-1J_e5 } rFj-kojg 9vGu0Um ~^r29'3 //打印回应的头信息 |6K+E6H public void logResponseHead(HttpURLConnection con) Z:sg} { 5',8 ziJQ for(int i=1;;i++) V`XNDNJ: { @W[f1 String header=con.getHeaderFieldKey(i); rLI8pA|. if(header!=null) Y6zbo //responseHeaders.put(header,httpConnection.getHeaderField(header)); <~n"m Utility.log(header+" : "+con.getHeaderField(header)); %&w3;d;c else sP;nGQ.eN break; 0;AA/ } hPUYyjXPB } 1+jAz`nA:T ~,oMz<iMV }dWq=)* public void splitterStop() ebUBrxZX { 7!EBH(,z bStop = true; kT"Kyd } Q;43[1&3w i]6`LqlO K1\a#w } /
zB0J? ND>r#(_\ w[S pw<Z /* QgU8s'e **FileAccess.java tG9BfGF *//文件访问(定位,写) jv%kOovj package NetFox; 17oa69G import java.io.*; T`\x,`
^ Vzdh8)Mu\ naYrpK,. public class FileAccessI implements Serializable{ %_RQx2 M<.d8?p ) //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \{Z;:,S RandomAccessFile oSavedFile; LcSX *MC long nPos; ?'@8kpb 3=FZ9>by GqaDL3Niqs public FileAccessI() throws IOException Mc09ES { q Gw -tPD< this("",0); C":32_q } -0$55pa/@: oX S1QT`B E*V`":efS public FileAccessI(String sName,long nPos) throws IOException #fM#p+v { P"y`A}Bx oSavedFile = new RandomAccessFile(sName,"rw"); ~sl{ |E this.nPos = nPos; OjJXysslXO oSavedFile.seek(nPos); -@yh>8v } 7\$qFF-y 4e~A1- :km61 public synchronized int write(byte[] b,int nStart,int nLen) u frW\X { tyXuG< int n = -1; Zhh2v>QOy try{ s>;v!^N?u oSavedFile.write(b,nStart,nLen); &x[E;P*Fg n = nLen; L+Xc-uv["p } < Z{HX[y catch(IOException e) 2XFU1 AW { xO^:_8=&: e.printStackTrace (); 5p<ItU$pnL } !UG
7Uer Xu<k3oD7 Sp@^XmX(S return n; W-x?:X<} } { /K.3 {sihus#Q "!Uqcay- } K`iv c N" <3xyjX'NE OMWbZ>jB /* ])|d"[ur= **SiteInfoBean.java Cdas P9"1 */ U=DmsnD, package NetFox; ]h>_\9qO o.w\l\ g!$!F>[ public class SiteInfoBean { p2n0Z\2 %X4xv_o`f eqP&8^HP private String sSiteURL; //Site's URL ),U X4%K= private String sFilePath; //Saved File's Path As 3.Q(#Z private String sFileName; //Saved File's Name U]^HjfX\ private int nSplitter; //Count of Splited Downloading File 4{hps.$?~ xIxn"^' Xf02"PXC public SiteInfoBean() ofPHmh` {//nSplitter的缺省值为5 :"=ez<t //default value of nSplitter is 5 CK,7^U this("","","",5); D2](da:]8) } W=#:.Xj[ bu:S:` +?u~APjNN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (d(hR0HKE { ue4Vcf sSiteURL= sURL; +Vm}E0Ov sFilePath = sPath; [`^a=:* sFileName = sName; &j4 xgh 9 this.nSplitter = nSpiltter; } \HN&@ ^aH\7J@Y \hBG<nH{0 } |+iws8xK? A6:es_ DE%KW:Hug public String getSSiteURL() ^Wc@oa` { 9cf:pXMi return sSiteURL; G]+&!4 } k p<OJy 7w'wjX- -i)ZQCE public void setSSiteURL(String value) ptDY3n~' { ;.TRWn# sSiteURL = value; X:6c}p%,! } *^f<W6xc _9=Yvc= p1&b!*o- & public String getSFilePath() [-\%4 { &K.?p2$X return sFilePath; OY:,D } ~ ip,Nl ~ vJ,`? VH+%a<v" public void setSFilePath(String value) c17_2 @N { f7=((5N sFilePath = value; pgOQIzu } /4g1zrU G*-b}f |962G1. public String getSFileName() !{^PO<9 { .u4
W / return sFileName; z"0I>gl } (>r[-Bft ~y/
nlb! 89o/F+ _b public void setSFileName(String value) .w0s%T,8}^ { oZ!m sFileName = value; M+w=O!dq } h&--,A > P*I}yPeb .
koYHq public int getNSplitter() yt.F\ [1 { i(>4wK!! return nSplitter; ;*:Pw?' } tE)suU5Y go'-5in( }Q=!Y>Tc public void setNSplitter(int nCount) dvt9u9Vg= { q U]gj@R nSplitter = nCount; kzt(i Y_6 } <})2#sZO! }
w-Da~[J v"#mzd.tW X22[tqg;& /* k + H3Bq **Utility.java (=* cK-3 */ YbTxn="_ package NetFox; H;YP8MoQ i*#-I3 Yy)tmq public class Utility { `/EGyN6X Tl2C^j XpBj%e: public Utility() wid;8%m { &NH$nY.r IW@PF7 A?-oL=' } J6L K *# tJM.Z //线程睡眠 <gJU?$ public static void sleep(int nSecond) RPE5K:P { QA5QweL try{ dIRm q+d^ Thread.sleep(nSecond); Qj.l:9% } V3c l~ catch(Exception e) ?<(m
5Al7 { ]>~)<
e.printStackTrace (); M;p
em< } kH]yl
2 } Z; A`oKd V`bi&1?6\ //日志 5A
sP5 public static void log(String sMsg) =gJb^
Gx(w { ,'p2v)p^4 System.err.println(sMsg); rzh#CnL3 } pO ml8SQf %2XHNW t4-pM1]1_
public static void log(int sMsg) m6',SY9T {
?sMP~RHQ System.err.println(sMsg); -5I2ga } 2Fq<*pxAY
} BPdfYu,il o[cV1G Y0_),OaY /* )FpZPdN+h **TestMethod.java +;#Y]xy: */ { Fawt: package NetFox; " e}3:U5n \>7^f
3m r9
!Tug*>m public class TestMethod { /4vG3 )*,5"CO OU/MiyP2 public TestMethod() >]W)'lnO { ///xx/weblogic60b2_win.exe > 3&: 5 try{ "87ghj_} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2U; t(,dn' //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); pb$~b\s]= SiteFileFetch fileFetch = new SiteFileFetch(bean); Z| V`B ` fileFetch.start(); EpFQ|.mQ } WC|.g,9# catch(Exception e){e.printStackTrace ();} *{yK
8 {6~l$ []A%<EI7 } dO4{|(z
AiK jSwf*u public static void main(String[] args) \o/n { |Tm!VFd new TestMethod(); DBT&DS } ^9ePfF)5 } F$hYKT2| 点击下载更多相关资料
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