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/* #u<Qc T@ **SiteFileFetch.java #F*|@ */ JuRoeq. package NetFox; 'Pz%c}hJ import java.io.*; ]AP1+
&9fN import java.net.*; GnV0~? <?jdNM 93-Y(Xx)bY public class SiteFileFetch extends Thread { ~m%[d.
}e >&L|oq7$ V la,avON SiteInfoBean siteInfoBean = null; //文件信息Bean IS C.~q2 long[] nStartPos; //开始位置 B.<SC long[] nEndPos; //结束位置 a(Y'C`x FileSplitterFetch[] fileSplitterFetch; //子线程对象 *2X6;~ long nFileLength; //文件长度 ~/:vr boolean bFirst = true; //是否第一次取文件 h@)U,& boolean bStop = false; //停止标志 KuNLu31% File tmpFile; //文件下载的临时信息 WSThhI DataOutputStream output; //输出到文件的输出流 +,Dc0VC? G#iQX` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) q:{#kv8 public SiteFileFetch(SiteInfoBean bean) throws IOException )!y>2$20 r { 2FcL-? siteInfoBean = bean; 4Nm >5*] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >hKsj{=R7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^Fk;t if(tmpFile.exists ()) Q&m85'r5X { fV:15!S[ bFirst = false; c?::l+ read_nPos(); 77e*9/6@ } ^df wWP else Z['.RF'` { J )1 nStartPos = new long[bean.getNSplitter()]; dzcF15H1 nEndPos = new long[bean.getNSplitter()]; ;!yK~OBxt } CjdM*#9lW ?z
,!iK` *[MWvs:, rK~-Wzwu } *0WVrM06? {f*Y}/@ \BOoY# !a public void run() ,|%KlHo^ { 3CUQQ_ //获得文件长度 I-v}
DuM //分割文件 #ydold{F //实例FileSplitterFetch 9O[IR)O~ //启动FileSplitterFetch线程 Ht`fC|E //等待子线程返回 /iW+<@Mas try{ ]kh]l8t ^ if(bFirst) Rq4;{a/j { >Wg=
Tuef nFileLength = getFileSize(); rOIb9: if(nFileLength == -1) i4C{3J^ { ?2<QoS System.err.println("File Length is not known!"); ",r
v%i2 f } G
hM else if(nFileLength == -2) #h!+b { c
'|*{%<e2 System.err.println("File is not access!"); |jsI-?%8J } ktu?-?#0, else RK# 6JfC3X { !E70e$Th for(int i=0;i<nStartPos.length;i++) B`pBIUu { cJKnB!iL5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); UhB+c } ?7\V)$00(& for(int i=0;i<nEndPos.length-1;i++) UG1<Xfu| { ,f03TBD} nEndPos = nStartPos[i+1]; l;F"m+B!$ } 3ML][|TR nEndPos[nEndPos.length-1] = nFileLength; fif;n[< } ^`H'LD } /4{WT?j ^Z (cVg s5,@=(,
//启动子线程 F`}'^> fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; " <bjS for(int i=0;i<nStartPos.length;i++) 'CBwE&AL { X[z;P!U fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ODJ"3 J siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !G%!zNA S nStartPos,nEndPos,i); tpI/Ibq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m:_#kfC&K" fileSplitterFetch.start(); "|\hTRQ } V[ UOlJ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g4W$MI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :?f<tNU$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Aez2n(yac nEndPos = " + nFileLength); 4S(G366 // fileSplitterFetch[nPos.length-1].start(); lp*5;Ls'q / Pjd" H UJqB0D
? //等待子线程结束 mQj# \<* //int count = 0; eI-fH //是否结束while循环 6Ga'_P: boolean breakWhile = false; >iyNZ]."\ r$<!?Z l,n_G/\ while(!bStop) 4DIU7#GG { k_g@4x1y* write_nPos(); b~;:[ #
Utility.sleep(500); Y58H.P breakWhile = true; '[
c-$X2Ak -=-^rQx9 5N9Cd[4 for(int i=0;i<nStartPos.length;i++) s:<y\1Ay { e`Yj}i*bx] if(!fileSplitterFetch.bDownOver) %+r(*Q+0$f { |\bNFnn( breakWhile = false; hyxv+m[ break;
Zl_sbIY } HSud$(w } e"@r[pq-{u if(breakWhile) g.\b@0Uy' break; E2Sj IR} CfOyHhhKX /}u:N:HA% //count++; u`EK^\R //if(count>4) J5b3r1~D"[ // siteStop(); ErN[maix# } #h.N#{9 t{,$?} >MJ%6A> System.err.println("文件下载结束!"); 3 EAr=E] } *b;)7lj0h catch(Exception e){e.printStackTrace ();} /5%'q~ } yXkQ
,y }[%F !,-'wT<v //获得文件长度 9f['TG," public long getFileSize() 6l|L/Z_6 { l[ko)%7V int nFileLength = -1; M"mvPr9 try{ "eoPG#]& URL url = new URL(siteInfoBean.getSSiteURL()); "P.sKhuo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 02 FLe*zQ httpConnection.setRequestProperty("User-Agent","NetFox"); (9bU\4F\ U>IsmF>m *3^7'^j< int responseCode=httpConnection.getResponseCode(); |yNyk7~ if(responseCode>=400) '>OEQU5- { ;E}&{w/My processErrorCode(responseCode); 7|Vpk&.> return -2; //-2 represent access is error ]Y
&
2& } ,>g(%3C 'bv(T2d~~ &WCVdZK: String sHeader; 7d{xXJ- q.:a4w J 6o#J for(int i=1;;i++) 9U9ghWH8 { ^=I[uX-3ue //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); tIA)LF //Utility.log(in.readLine()); vr>J$(F sHeader=httpConnection.getHeaderFieldKey(i); *~`oA~-Q if(sHeader!=null) Z(E.F,k { u`L* if(sHeader.equals("Content-Length")) 11$v~<M { O[ans_8 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4pDZ +}p break; U:/_T>f% } v@X[0J_8 } Mc else JjAO9j% break; kSJ:4! lFU } Cn9MboXX } 8BIPEY -I? catch(IOException e){e.printStackTrace ();} c1]\.s catch(Exception e){e.printStackTrace ();}
?s 0")R& jaTCRn3|<
*!EHs04 Utility.log(nFileLength); UR`pZ.U? QD[l 6 |?fc]dl1] return nFileLength; m<9W# } WtSlD9 h =2wy;@f ku5g`ho //保存下载信息(文件指针位置) el0W0T private void write_nPos() a'@?c_y;$ { K)oN^ try{ 1n
ZE9;o output = new DataOutputStream(new FileOutputStream(tmpFile)); LD5E output.writeInt(nStartPos.length); xeHqC9Ou for(int i=0;i<nStartPos.length;i++) -E!V;Tgc%U { #`Et{6WS // output.writeLong(nPos); > cJX'U9 output.writeLong(fileSplitterFetch.nStartPos); -aMwC5iR@ output.writeLong(fileSplitterFetch.nEndPos); !FnH; } 2TC7${^9}J output.close(); =HvLuVc } F9SIC7}uH catch(IOException e){e.printStackTrace ();} j#XU\G catch(Exception e){e.printStackTrace ();} (aH_K07 } 7<ES&ls_ q}R" vCNYqa)m: //读取保存的下载信息(文件指针位置) jZY9Lx8o private void read_nPos() ;c>Rjg&[ { 'uOp?g' 7 try{ Ie;}k;?- DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); seH#v int nCount = input.readInt(); :!EOg4%i nStartPos = new long[nCount]; WxLILh nEndPos = new long[nCount]; ]+S.#x`# for(int i=0;i<nStartPos.length;i++) pRdO4?l { &"svt2 nStartPos = input.readLong(); h:+>=~\ nEndPos = input.readLong(); ZjJEjw } T+/Gz' input.close(); 2\!.w^7'^T } xH8nn3U catch(IOException e){e.printStackTrace ();} :U;ZBs3 catch(Exception e){e.printStackTrace ();} 86@@j*c(@k } )Nq$~aAm yyHr. C t
UW'E private void processErrorCode(int nErrorCode) Zt[1RMO { 4d3PF`,H` System.err.println("Error Code : " + nErrorCode); yz2NB?) } N|1k6g=0 m[u
6<C Hw/1~O$T //停止文件下载 Z)(C7,Xu public void siteStop() C`x>)wm: { 'u.`!w '|L bStop = true; an<tupi[E for(int i=0;i<nStartPos.length;i++) L+QEFQ:r5 fileSplitterFetch.splitterStop(); @*l}2W M|`%4vk> 4 ITSDx } *-Y|qS% } 0:nQGX!N //负责部分文件的抓取 (85F1"Jp **FileSplitterFetch.java ? P`]^# */ U]ouBG8/ package NetFox; Hj;j\R >2 +3t(kQ $X-,6* import java.io.*; `pN]Ykt import java.net.*; qx53,^2 \"PlM!0du mrd(\&EhA public class FileSplitterFetch extends Thread { Ef$xum{ -D.6@@%Kc} c#`Z[ String sURL; //File URL K=Fcy#,f long nStartPos; //File Snippet Start Position E<&VK*{zcO long nEndPos; //File Snippet End Position 6576RT int nThreadID; //Thread's ID ~&4,w9b)j boolean bDownOver = false; //Downing is over 0/(YH boolean bStop = false; //Stop identical
[?Aq#av FileAccessI fileAccessI = null; //File Access interface 1/w['d4l! NRq
jn; ,+ UmQ 9_H 7 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException iQin|$F_O { yNY1g?E this.sURL = sURL; rMf& HX this.nStartPos = nStart; D@d/O this.nEndPos = nEnd; +69sG9BA nThreadID = id; 6eK18*j%H fileAccessI = new FileAccessI(sName,nStartPos);//定位 D
7H$!(F> } |'=R`@w~0 d%4!d_I< jt-ayLq public void run() KH2a 2 { +l&ZN\@0X while(nStartPos < nEndPos && !bStop) yZA}WTGe { HK5\i@G+< YJXh|@LT pt|u?T_+ try{ \nPa>2r URL url = new URL(sURL); Scs \nF2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,p>=WX httpConnection.setRequestProperty("User-Agent","NetFox"); ^^)D!I"cA, String sProperty = "bytes="+nStartPos+"-"; =QOtag1; httpConnection.setRequestProperty("RANGE",sProperty); @y)-!MHN(8 Utility.log(sProperty); RNp3lXf O xC!, v 0& qeSxE`E" InputStream input = httpConnection.getInputStream(); x@Z?DS$) //logResponseHead(httpConnection); #ra:^9;Es: 4 K{4=uU &d 9tR\} byte[] b = new byte[1024]; z)yxz:E int nRead; S#_i<u$$ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
JTQ$p*2] { KDwjck"5; nStartPos += fileAccessI.write(b,0,nRead); 8GV$L~i //if(nThreadID == 1) [L]
ca* // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qnv9?Xh } C-m
OtI 6#KRI%adw` 2\lUaC#E Utility.log("Thread " + nThreadID + " is over!"); RBJgQ<j8 bDownOver = true; '1|r+(q|2 //nPos = fileAccessI.write (b,0,nRead); 4U~[8U}g } 4=>/x90y catch(Exception e){e.printStackTrace ();} j!qO[CJJ } ^'*9,.ltd } 70mQ{YNN B@=+Fg DD VLA9&.*@ //打印回应的头信息 * pyi; public void logResponseHead(HttpURLConnection con) b;Pqq@P|g { H)G ^ Y1 for(int i=1;;i++) ,cYU { uRh`qnL String header=con.getHeaderFieldKey(i); h$G&4_O if(header!=null) yx4B!U //responseHeaders.put(header,httpConnection.getHeaderField(header)); j{0_K+B Utility.log(header+" : "+con.getHeaderField(header));
TfDx>
F$ else qeb:n$ break; |/Am\tk#13 } 0:@:cz=#* } x0?8AG% 88$G14aXEk 's8NO
Xlj public void splitterStop() SVpvx`&kT { L8Z[Ly+_ bStop = true; /KO!s,Nk } WhMr'l/e '{@hBB+ D @c,}\"( } 5^t68
WOl ]m{;yOQdsC KIps{_J[< /* -P]J:7*0?\ **FileAccess.java VTa?y *//文件访问(定位,写) KN'l/9. package NetFox; |qE"60&"} import java.io.*; )**k3u
t4 JR<#el
3/H^YM
@ public class FileAccessI implements Serializable{ c BQ|mA {:$0j|zL1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 WIb\+! RandomAccessFile oSavedFile; +*WE<4"!6 long nPos; kzZtKN9Az `zAV# y@ J\h8_ public FileAccessI() throws IOException D9B?9Qt2[ { :c"J$wT/ this("",0); I1=YSi;A } hun
LV8z B08q/qi f&bY=$iff public FileAccessI(String sName,long nPos) throws IOException [Qa0uM#SU { s[)2z3 oSavedFile = new RandomAccessFile(sName,"rw"); 8XD9fB^ this.nPos = nPos; Z'6
o$Xv oSavedFile.seek(nPos); >|KfO> } JAj<*TB.% [-bL>8 W1$B6+}Z0V public synchronized int write(byte[] b,int nStart,int nLen) j_-$xz5- { - o$S= int n = -1; 0I* ^VGZ try{ _|D8~\y oSavedFile.write(b,nStart,nLen); u`$,S&Er n = nLen; %?J\P@ } 2/RK
pl & catch(IOException e) e<dFvMO { G'q7@d{' e.printStackTrace (); d}3<nz, } I&3L1rl3{* F IDNhu l]Jk
}. return n; m1a0uEA
G } >Y?B(I2e R!lNm,i aD8cqVhM3& } |jJC~/WR )I9AF,K Y=sRVypJ /* Mii-Q`.: **SiteInfoBean.java Na=9ju */ VG*BAFs package NetFox; I>k3X~cG 8s-RNA>7^ u{"o*udU public class SiteInfoBean { EC&t+"=R { cnya* 38b%km# private String sSiteURL; //Site's URL 2/sD#vC private String sFilePath; //Saved File's Path w&f8AY)#]4 private String sFileName; //Saved File's Name *E+2E^B private int nSplitter; //Count of Splited Downloading File }OJ*o `sQ\j Nu @4^5C- public SiteInfoBean() L^yQb4$&M {//nSplitter的缺省值为5 E D*=8s2 //default value of nSplitter is 5 .21%~"dxJ this("","","",5); >Bq;Z}EV } 6_=qpP-? JQYIvo1,Q iaQ[}'6!$ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :k6|-A2 { k:4 Zc3 sSiteURL= sURL; 8jd<|nYnfc sFilePath = sPath; 6%H8Qv sFileName = sName; vC E$)z'" this.nSplitter = nSpiltter; +"Ih'bb`j v Q[{<|K iC?s`c0B } sqi~j(&\1 wXPNfV<(2 bM;yXgorU public String getSSiteURL() >"jV8%!sM { ,pa,:k? return sSiteURL; /%po@Pm#I } Dx$74~2e Ev0GAc1 Iwi>yx8 public void setSSiteURL(String value) .{k(4_Q?I { I+D`\OSL sSiteURL = value; leiED' } |xZDc6HDW r(yJE1Wz x5v^@_:
jr public String getSFilePath() 0(|R NV_ { GC66n1- X return sFilePath; _DMj)enH" } B, xrZ s <Xm5re. vY *p][$ public void setSFilePath(String value) }U7>_b2 { 2n?\tOm(V sFilePath = value; [POcO } cx|[P6d ($E(^p% O |(}uagfrd public String getSFileName() Vm'ReH { >ly= O return sFileName; w!:u| } (sS[F-2R7 reM%GU +6*oO| public void setSFileName(String value) t"2WJ-1k} { <3P?rcd,5K sFileName = value; &|%z!x6 f } I
m_yY c1wgb8 dS0G+3J&+E public int getNSplitter() \>cZ= { 9XT6Gf56 return nSplitter; Mki(,Y|1~ } cy)L%`(7 sa#=#0yg $MKx\qx} public void setNSplitter(int nCount) 1(w0*` { ]WN{8 nSplitter = nCount; (loUO;S= } fL83:<RK } o1Mb HBb #Q 2$v; o|]xj' /* $msT,$NJ **Utility.java b$PNZC8f */ ?-#w [J'6 package NetFox; ~W5fJd0 >m}.}g8 GJ%It. public class Utility { @)<uQ S z9h`sY~ xw%?R=&L public Utility() eX?o4> { \5s!lv*& -jC. dz SnQ$ } jt3s;U* cB.v&BSW //线程睡眠 ed{z^!w4 public static void sleep(int nSecond) Mk@ _uPm { zG [-n. try{ &JfyXM[] Thread.sleep(nSecond); k B2+ Tr } T%P0M* catch(Exception e) rxP^L(q0* { VrF]X#\) e.printStackTrace (); r2""p } E'MMhlo } gl]{mUZz} ~JC``&6E=} //日志 {zVJlJKxs public static void log(String sMsg) sB7DF<91 { ]NTHit^EX System.err.println(sMsg); R#1m_6I } Fi7pq2 JG/sKOlA ReSP)%oW public static void log(int sMsg)
HkEp}R { c%xxsq2n System.err.println(sMsg); :+E>UzT } AqN(htGvx } v`wPdb SvI 5n(p1OM2q /* v+Mt/8 **TestMethod.java 2a?
d:21 B */ rTmcP23] package NetFox; WU=Os8gR !*CL>}-, DCwldkdJN public class TestMethod { X^aujK^@ ig?]kZ .'X$SF` public TestMethod() P_b00",S { ///xx/weblogic60b2_win.exe !_x-aro3< try{ P6IhpB59 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); pdtK3Pf //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N18Zsdrp SiteFileFetch fileFetch = new SiteFileFetch(bean); A`OU}'v?L fileFetch.start(); V]vk9M2q[l } ;|
\Ojuf catch(Exception e){e.printStackTrace ();} Nk^#Sa? :j9;P7&"? JY>]u*= } [8)Zhw$ M%$zor 66z1_lA public static void main(String[] args) lHP[WO
{ j\Q_NevV new TestMethod(); nnr(\r~ } yYF80mnJz } bLf }U9 点击下载更多相关资料
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