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/* U$@p"F@P **SiteFileFetch.java x_CB'Rr6 */ ]X?~Cz/wl package NetFox; =/&ob%J)9] import java.io.*; 4#MvOjA5[ import java.net.*; 2cY7sE068 TK<~(Dk dPwe.: public class SiteFileFetch extends Thread { 3
[: x#r $=uyZTYF)} }A3(g$8KR SiteInfoBean siteInfoBean = null; //文件信息Bean |FGt' long[] nStartPos; //开始位置 b&f;p}C24 long[] nEndPos; //结束位置 hPLQ)c? FileSplitterFetch[] fileSplitterFetch; //子线程对象 )eop:!m long nFileLength; //文件长度 }\k"azQ` boolean bFirst = true; //是否第一次取文件 -Qgu6Ty boolean bStop = false; //停止标志 ] S<y,d- File tmpFile; //文件下载的临时信息 O?/\hZ"&c DataOutputStream output; //输出到文件的输出流 ~gQ$etPd .<}(J#vC //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z1XFc*5 public SiteFileFetch(SiteInfoBean bean) throws IOException -} \g[| { C2NJrg4( siteInfoBean = bean; 12n5{'H2% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J;,6ydf8! tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); D ksSD if(tmpFile.exists ()) %B5.zs]Of { )F4H' bFirst = false; v_?0|Ei[ read_nPos(); TkXD#%nFY } a@$ U?=\e else Aq@_^mq1A { q[`)A?Ae nStartPos = new long[bean.getNSplitter()]; 7Gd)=Q{uur nEndPos = new long[bean.getNSplitter()]; 0Aw.aQ~E8i } >MZWm6M8 ac%%*HN, o<ak&LX`9 e0Cr> I5/e } 9AK<<Mge. Fn.wd`'0 E,&BP$B public void run() zim]3%b*A; { P -0 //获得文件长度 w|!>>W6J //分割文件 fx(^}e //实例FileSplitterFetch 2V%si 6 //启动FileSplitterFetch线程 l&2A]5C //等待子线程返回 $BKGPGmh try{ Nv}'"V> if(bFirst) H~UxVQLPp { 0PO'9# nFileLength = getFileSize(); >fRI^Q, if(nFileLength == -1) tn!z^W { L1ZhH3}X System.err.println("File Length is not known!"); M7!>-P } |fnP@k else if(nFileLength == -2) +ptVAg+ { Ht|No System.err.println("File is not access!"); vHSX3\( } Nr)v!z~y
else S\=j; Uem { bE:oF9J? for(int i=0;i<nStartPos.length;i++) ZD\`~I|gp { C[MZ9r nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;1PnbU b } U,
_nEx for(int i=0;i<nEndPos.length-1;i++) >MD['=J[d { LdxrS5 nEndPos = nStartPos[i+1]; C5oslP/@ } #G2~#\ nEndPos[nEndPos.length-1] = nFileLength; jf25Ky~ } ({JXv } "]h4L <>JN3? c ;_ T //启动子线程 3\_ae2GW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Pf&\2_H3s9 for(int i=0;i<nStartPos.length;i++) .%) FK#s- { 3db ,6R fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IsjxD|u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), PqV9k,5f nStartPos,nEndPos,i); V|GH4DT= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I^erMQn[ z fileSplitterFetch.start(); _~V7m } d 7vD // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4FSA:]o- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); I\djZG$s;N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1OB,UU"S$ nEndPos = " + nFileLength); OUCLtn\ // fileSplitterFetch[nPos.length-1].start(); 'p<lfT YjaEKM8* (B|4wR\ //等待子线程结束 4CA(` _i~ //int count = 0; '.Iz*%" //是否结束while循环 k"_i7 boolean breakWhile = false; :lj1[q:Y> '&/ 35d9|* O[ tD7!1 while(!bStop) htC~BK3( { {A2EGUmF2 write_nPos(); Bk,:a, Utility.sleep(500); Co[fq3iX# breakWhile = true; `-a](0QU 2d:<P!B B-Bgk for(int i=0;i<nStartPos.length;i++) Gx Z'" x { TG4?"0`I5 if(!fileSplitterFetch.bDownOver) B#RBR<MFC { #OlU|I breakWhile = false; n8W+q~sW% break; kA3nhBH } :`('lrq } Qtj.@CGB if(breakWhile) eeKErpj8A break; zN}1Qh /{Ff)<Q.Z I5EKS0MQ! //count++; *sNZ.Y:. //if(count>4) R^8L^8EL // siteStop(); D7q%rO|F' } lmmB =F &'%b1CbE 'a ]4]d System.err.println("文件下载结束!"); dkTewT6' } M"cB6{st[ catch(Exception e){e.printStackTrace ();} #4hxbRN } tA#7Xr+ 5f5bhBZ< ,/{(8hn //获得文件长度 /S4$qr cM public long getFileSize() j1/.3\ { u,h ,;'J int nFileLength = -1; +um
Ua try{ L~x
PIu URL url = new URL(siteInfoBean.getSSiteURL()); qg521o$* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $ =
uz httpConnection.setRequestProperty("User-Agent","NetFox"); b6KO_s:'g SvR:tyF B[XVTok int responseCode=httpConnection.getResponseCode(); =W+ h.? if(responseCode>=400) E?$|`<o{|` { %:61@< processErrorCode(responseCode); tE&@U$0>o return -2; //-2 represent access is error ""AP-7 } BS-nn y w[`2t{^j Po+I!TL' String sHeader; y3!r;>2k= Fk&W*<}/; 5Q_T=TL for(int i=1;;i++) )=,%iL- { h7],/? s //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); n*%o!= //Utility.log(in.readLine()); rHS;wT sHeader=httpConnection.getHeaderFieldKey(i); =E{e|(1+u if(sHeader!=null) >lyX";X# { 05$;7xnf( if(sHeader.equals("Content-Length")) W lDcKY { sZ~q|}D- nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ;Y/{q B! break; um/2.Sn> } $U3|.4 } SZ/}2_; else Xr?(w(3 break; 2oY.MQD7iW } U[l7n3Y= } PwF
1Pr`r catch(IOException e){e.printStackTrace ();} >F@qFPN] catch(Exception e){e.printStackTrace ();} 4 h}03 oG +TA'P$j \BIa:}9O Utility.log(nFileLength); +w'"N x#wkODLqi m8Wv46% return nFileLength; n^} -k'l } z ^e99dz Z )Imj&; fW/G_ //保存下载信息(文件指针位置) ixK&E#
private void write_nPos() XUI9)Ne { 4!%@{H`3 try{ =bn(9Gm!J output = new DataOutputStream(new FileOutputStream(tmpFile));
dv?ael^ output.writeInt(nStartPos.length); ^,P#
<,D, for(int i=0;i<nStartPos.length;i++) ->BGeP_=| { Y|'0bujr // output.writeLong(nPos); M%*D}s-QE output.writeLong(fileSplitterFetch.nStartPos); HR.^
y$IE output.writeLong(fileSplitterFetch.nEndPos); X@ zw;Se } yH\3*#+ output.close(); B=EI&+F+ } |rjHH< catch(IOException e){e.printStackTrace ();} O=,[u? catch(Exception e){e.printStackTrace ();} _J|TCm } [#+yL QNH-b9u>8 nRP|Qt7> //读取保存的下载信息(文件指针位置) l|,
Hj private void read_nPos() NNKI+!vg { Z&f@)j try{ )K=%s%3h< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3K8#,TK3 int nCount = input.readInt(); 5y
9(<}z nStartPos = new long[nCount]; @W4tnM,# nEndPos = new long[nCount]; .G ^-.p for(int i=0;i<nStartPos.length;i++) HDmjt+3&n { {}sF?wZf nStartPos = input.readLong(); gD13(G98 nEndPos = input.readLong(); <7U\@si4 } 2)iwAu
input.close(); +ESEAi91 } M2pe*z catch(IOException e){e.printStackTrace ();} >9WJa 5{ catch(Exception e){e.printStackTrace ();} SG5GJCkc } [`F}<L." 4AIo,{( 5%qq#;[n private void processErrorCode(int nErrorCode) {D6p?TL+ { 9.:]eL System.err.println("Error Code : " + nErrorCode); n@TK}?\UoR } Su4&qY Aof)WKo QR ?JN\%? //停止文件下载 nrhzNW>] public void siteStop() :4Gc'bR { qjcPJ bStop = true; @r.w+E= for(int i=0;i<nStartPos.length;i++) &oz^dlw fileSplitterFetch.splitterStop(); Az+k8=? u<g0oEs) r<%ua6@ } H^VNw1. } lQ8h -Tz //负责部分文件的抓取 h_( #U)z_3 **FileSplitterFetch.java [NxC7p:Lo */ BR*'SF\T package NetFox; 4# L}& d@0p<at>~ s6DmZ^Y% import java.io.*; xJ$/#UdP import java.net.*; Q.U
wtH J1s~w`, Jbv[Ql# public class FileSplitterFetch extends Thread { R&-Vm3mc3 &x": '%H\k5^ String sURL; //File URL zu,F 0;De long nStartPos; //File Snippet Start Position Nf]h8d~ long nEndPos; //File Snippet End Position [$Dzf<0 int nThreadID; //Thread's ID /e:kBjysJ boolean bDownOver = false; //Downing is over V
6*ohC: boolean bStop = false; //Stop identical (u{?aG~ FileAccessI fileAccessI = null; //File Access interface h7P<3m} n@JZ 2K4 '^{:HR#i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException +55+%oGl { f@j )t%mh this.sURL = sURL; _.{I1*6Y2 this.nStartPos = nStart; qk{+Y this.nEndPos = nEnd; @W1F4HYds nThreadID = id; m8T< x> fileAccessI = new FileAccessI(sName,nStartPos);//定位 n9 %&HDl4 } 9n#lDL O *QGyF`Go{ 5r)]o'?s public void run() V JJ6q { 6CV9ewr while(nStartPos < nEndPos && !bStop) m]?C @ina { \) FFV-k5 Hrg~<-.La ;:]#Isq try{ 3J_BuMV URL url = new URL(sURL); A<U9$"j9J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); F1q6
3 httpConnection.setRequestProperty("User-Agent","NetFox"); tkX?iqKQ String sProperty = "bytes="+nStartPos+"-"; s=H|^v httpConnection.setRequestProperty("RANGE",sProperty); 8#{DBWU Utility.log(sProperty); _C%:AFPP> E]0}&YG 9 WO|g[Y3 InputStream input = httpConnection.getInputStream(); [["az'Lrk? //logResponseHead(httpConnection); IA;'5IF c gOkm}h Bnfp_SM byte[] b = new byte[1024]; _)U.5f< int nRead; s L=}d[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6Bf aB: { mUdj2vB$+' nStartPos += fileAccessI.write(b,0,nRead); i",7<01 //if(nThreadID == 1) 8W2oGL6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); rizWaw5E!8 } 0,]m.)ws f.G"[p J3z:U&%= Utility.log("Thread " + nThreadID + " is over!"); \0fk^
bDownOver = true; #/0d //nPos = fileAccessI.write (b,0,nRead); n)uck5 } M-V{( catch(Exception e){e.printStackTrace ();} \\)9QP? } O63:t$Yx# } UbEK2&q/8 .Y5o&at6s EXEB A&* //打印回应的头信息 4de:h E public void logResponseHead(HttpURLConnection con) !Z!X]F-fY { j[${h,p? for(int i=1;;i++) KQTv5|$? { $1uT`>% String header=con.getHeaderFieldKey(i); HZ[.,DuW if(header!=null) K"/3/`T //responseHeaders.put(header,httpConnection.getHeaderField(header)); +GvPJI Utility.log(header+" : "+con.getHeaderField(header)); +A-z>T( else #GuN.`__n, break; -R-yr.$j* } \~>
.NH- } _J X>#h `{1~]?-& @q"HZO[ public void splitterStop() y#{v\h
Cz { _KJ!C! bStop = true; 0^83:C
^{ } \h@3dJ4 awl3|k/ }0}=-g& } dT7!+)s5- ;R([w4[~ 3_ ZlZ_Tq /* [tk6Kx8a **FileAccess.java .$ X|96~$ *//文件访问(定位,写) WRp0. package NetFox; dUH+7.\ import java.io.*; Yy'CBIq#f =`ECM7 \YPvpUg public class FileAccessI implements Serializable{ -<l2 $&KS Wi@YJ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 oV'G67 W RandomAccessFile oSavedFile; I+/fX0-Lib long nPos; :E.T2na !;Vqs/E hrW2#v public FileAccessI() throws IOException 8 .t3`FGH { %J8uVD.2 this("",0); Ip|=NQL> } k_`h (R U&W/Nj snYyxi public FileAccessI(String sName,long nPos) throws IOException j@R"AP}
{ * .g[vCy oSavedFile = new RandomAccessFile(sName,"rw"); WOQ>]Z this.nPos = nPos; gKP=@v%- oSavedFile.seek(nPos); 8GeJ%^0o} } 3qkPe_<I #$;}-* @RHG@{x{K public synchronized int write(byte[] b,int nStart,int nLen) ~3)d?{5 { "fC>]iA8I int n = -1; I2WWhsNC try{ {_4`0J`3 oSavedFile.write(b,nStart,nLen); >en\:pJn)' n = nLen; On0,#i= } <;*w97n catch(IOException e) u6 Yp,!+ { TN/y4(j e.printStackTrace (); 3e9UD N2 } m=25HH7enb ^% L;FGaA hi/Z>1ZOX return n;
(aLjW= } n&2OfBJ W5/|.} sB5@6[VDI } gs&F
.n nrR2U` 6mqp`x` /* QjKh#sU& **SiteInfoBean.java urg^>n4V] */ *M.,Yoj package NetFox; n#sK31;yb QO:Z8{21So [X7gP4 public class SiteInfoBean { 1p8pH$j' S9[Y1qH>K P(!%Pp private String sSiteURL; //Site's URL dL~^C I private String sFilePath; //Saved File's Path *z};&UsF{ private String sFileName; //Saved File's Name I|wC`VgB private int nSplitter; //Count of Splited Downloading File B`YD>oCN CwD=nT5` Vjd(Z public SiteInfoBean() {Wndp% {//nSplitter的缺省值为5 j`#H%2W\; //default value of nSplitter is 5 %Fx^" this("","","",5); yqH9*&KH{ } g_JQW(_ gvr&7=p !>f:wk2 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) -s0\ 4 { B|.A6:1g+ sSiteURL= sURL; }a;H2&bu sFilePath = sPath; egAYJK-,! sFileName = sName; qcC(#0A> this.nSplitter = nSpiltter; !<out4Mz" WcY $=\7 P)Rq\1: } Q.fUpa v NLu[<u U* JXHf$k public String getSSiteURL() P/xEn_*v { BF 0#G2`h> return sSiteURL; `KZu/r-M9 } K'B*D*w zN9#qlfv ^Vi{._r public void setSSiteURL(String value) gjx-tp 1. { qMoo#UX sSiteURL = value; -3 Sb%V\ } ]$#9B-uB SAdo9m' -q8l"i>h= public String getSFilePath() ^j2ve's: { L c
)i return sFilePath; >cpv4Pgm } $@l=FV_; yo8mfH_, s>W :vV@ public void setSFilePath(String value) * U}-Y* { #U4
f9.FY* sFilePath = value;
N3zZ>#{ } )!U@:x\K =[zP ^nK 7&]rK public String getSFileName() DWEDL[{ { e1y#p3 @d return sFileName; (BngwLVDK } )CHXfO w jT/P+2hMW p2< 927z public void setSFileName(String value) 4>HaKJ-c# { j5og}Pq: sFileName = value; g7^|(!Y% } !D ?(}nag @eutp`xoT\ >?_}NZ,y public int getNSplitter() y^[t3XA6Q { 9_4(}|"N| return nSplitter; :pNS$g[ } .R#-u/6g( U#bmMH Ya>AI.!K public void setNSplitter(int nCount) [qxU
\OSC { Vf.*!`UH nSplitter = nCount; \B:k|Pw6~ } We\i0zUU } s: iBl/N} c`&g.s@N\ R4T@ ]l&W /* bg/=P>2 **Utility.java P{BW^kAdH */ D?UURUR f package NetFox; W /*?y & 2(x|
% X
@pm !c# public class Utility { ExN$J t: oQHhO? gz~ug35 public Utility() Jt#HbAY { +0j{$MPZ Zy.A9Bh~ h_\(
$" } CBNt
_y mIp> ~ //线程睡眠 ~:PM_o*6 public static void sleep(int nSecond) oO`a {n- { 'U*#71S try{ dh.{lvlX| Thread.sleep(nSecond); jl]3B } Yyd]s\W catch(Exception e) {:b~^yW { Ju&FwY+ e.printStackTrace (); ylb)SXBf } w c~s: } mP/#hwzB&q wnK6jMjkSf //日志 9+$IulOvk public static void log(String sMsg) 2+?W{yAEi { *DXX*9 0 System.err.println(sMsg); ?B$L'i[l } F6{/iF isdNW l <RpTk*Yo^= public static void log(int sMsg) PkZ1Db { U$y wO4. System.err.println(sMsg); T8)X?>CIW } 3$Vx8:Rhdn } -ah)/5j S:Jg#1rww- ]=ZPSLuEm% /* 'h7x@[| **TestMethod.java if*~cPnN */ aMxj{*v7 package NetFox; ~l?c.CSd N$v_z>6Z _L` uCjA public class TestMethod { zUDXkG*Lv Qds:*]vGS UZmUYSu; public TestMethod() ->o[ S0 { ///xx/weblogic60b2_win.exe r$-P try{ %Y0BPTt$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); =cb!2%?} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5O]ZX3z> SiteFileFetch fileFetch = new SiteFileFetch(bean); WNb2"W fileFetch.start(); sZxTsUW } e=p_qhBt catch(Exception e){e.printStackTrace ();} 6rWq
hIaI R,["w98a \ltS~EuWU } xLLTp7b( 'p\&Mc_Gu Cg%Owe/E?0 public static void main(String[] args) ki }Li*)7 { Y~Vc|zM^( new TestMethod(); |pbetA4& } _(~LXk^C } Y2tBFeWY 点击下载更多相关资料
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