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/* !%/(a)B$^$ **SiteFileFetch.java nT=XWM */ G| qsJ package NetFox; BB.120v&N import java.io.*; [H{2<! import java.net.*; 'k/:3?R _eUd
RL> |J:m{ public class SiteFileFetch extends Thread { r)oR`\7 L@`:mK+; eJE!\ucS2W SiteInfoBean siteInfoBean = null; //文件信息Bean l4\ !J/df long[] nStartPos; //开始位置 {}"a_L&[; long[] nEndPos; //结束位置 hQaa"U7[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 /g$8JL long nFileLength; //文件长度 Qb' Q4@. boolean bFirst = true; //是否第一次取文件 +.McC$!s
boolean bStop = false; //停止标志 0Z
jE(3i File tmpFile; //文件下载的临时信息 C#P7@ JE DataOutputStream output; //输出到文件的输出流 4tz@?TCb Fz2CXC //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yQ| V7G public SiteFileFetch(SiteInfoBean bean) throws IOException E51S#T { %XH%.Ps/ siteInfoBean = bean; I$*LMzve //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G!7A]s>C tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4{LKT^(!f if(tmpFile.exists ()) ~9c jc { :"`1}Q bFirst = false; V lS`m,:{ read_nPos(); "=yz}~, } UoHNKB73 else zin'&G>l { lKV7IoJ&; nStartPos = new long[bean.getNSplitter()]; fhmBKeFdV
nEndPos = new long[bean.getNSplitter()]; '}E"Mdb } s"x(i T2 /u7<D- /@0 <"nF`'olV } (>`S{L
C>s ]s`cn}d LXm@h public void run() /l;_ xs { )u]1j@Id //获得文件长度 #=#bv` //分割文件 60r0O5=|Fl //实例FileSplitterFetch `Db%:l^e //启动FileSplitterFetch线程 8" (j_~; //等待子线程返回 [9\Mf4lh# try{ %9_jF" if(bFirst) W/u_<\ { E+~1GKd nFileLength = getFileSize(); r=<1*u if(nFileLength == -1) Xuj=V?5 { .B{:<;sa System.err.println("File Length is not known!"); f9^MLb6) } z;\,Dt else if(nFileLength == -2) Aq_?8 Cd { @m9dB P System.err.println("File is not access!"); qm"AatA } IY}{1[<N else _vUId?9@+e { #-kx$(''V for(int i=0;i<nStartPos.length;i++) @[~j|YH} { >[4CQK`U nStartPos = (long)(i*(nFileLength/nStartPos.length)); nk2H^RM^ } q5~"8]Dls for(int i=0;i<nEndPos.length-1;i++) @Op7OFY% { Qk].^'\ nEndPos = nStartPos[i+1]; rDC=rG } >g2Z t;*@w nEndPos[nEndPos.length-1] = nFileLength; cCq mrjUmV } As(6E}{S } G<`6S5J>hr 2bxW`.fa hlFvm$P`M //启动子线程 2E@g#:3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ;qaNIOo9 for(int i=0;i<nStartPos.length;i++) J['i { Xe@:Aun fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N`+@_.iBX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $mn+ nStartPos,nEndPos,i); AhQsv.t Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o=
&/;X fileSplitterFetch.start(); iy [W:<c7j } qjf9ZD& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gF r-P! 3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (4C_Ft*~j // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,9~qLQ0O nEndPos = " + nFileLength); 8!qzG4F/ // fileSplitterFetch[nPos.length-1].start(); !uAqY\Is nI,-ftMD-| XF`?5G~~# //等待子线程结束 >!%+) //int count = 0; ~!"z`& //是否结束while循环 %h&F boolean breakWhile = false; #%.fsJNA$ q!<n\X3]u j Kp79]. while(!bStop) :nxBM#:xu { hf5+$^RZ write_nPos(); yXCJ? Utility.sleep(500); hh<ryuZ breakWhile = true; APq Yf<W (gb
vInZ W!)B%.Q for(int i=0;i<nStartPos.length;i++) tWA<OOl
{ (`&E^t if(!fileSplitterFetch.bDownOver) "$ep=h+ {
P5`BrY,hZ breakWhile = false; b.QL\$a
& break; K#[z5 } uw{K&Hxw } imZ"4HnPP if(breakWhile) 0w?G&jjNtM break; Jv59zI 3EA`]&d> uex([;y //count++; .CEl{fofj //if(count>4) k.W1bF9n6 // siteStop(); pZ&?uo67_ } Df=Xbf>jt9 lnt}l #BhcW"@ System.err.println("文件下载结束!"); z;PF%F } T;{"lp. catch(Exception e){e.printStackTrace ();} G>S3? jGk } )\QPUdOvx 5k`Df/ tWITr //获得文件长度 5.F/>?< public long getFileSize() #NQx(C { M+Eg{^ q` int nFileLength = -1; p~h[4hP try{ ""x>-j4 URL url = new URL(siteInfoBean.getSSiteURL()); Frum@n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O.$OLK;v httpConnection.setRequestProperty("User-Agent","NetFox"); y1kI^B 9bu1Ax1M W|V9:A int responseCode=httpConnection.getResponseCode(); h]p$r`i7 if(responseCode>=400) }cERCS\t { Ex4)R2c* processErrorCode(responseCode); bs?&;R.5 return -2; //-2 represent access is error 2;`WI:nt } DQ%(X&k 1NQU96 eRB
K= X String sHeader; xs$.EY:k X?n($z/{ pu
Z0_1uN for(int i=1;;i++) :zsMkdU { `f\+aD'u //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,*g.?q@W2 //Utility.log(in.readLine()); O*m9qF< sHeader=httpConnection.getHeaderFieldKey(i); dS;Ui]/J if(sHeader!=null) \>c1Z5H> { TS@U0Ror if(sHeader.equals("Content-Length")) iKA qM{( { D@`"99z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %(izKJl q break; /H :Bu } H<ZXe!q(nx } |!uC [= else ?xb2jZ/0X break; V( 3rTDg } #hh7fE'9 } @zSj&4 catch(IOException e){e.printStackTrace ();} (?kCo catch(Exception e){e.printStackTrace ();} !c=EB`<* ]`TX%Qni 0oo*F Utility.log(nFileLength); ?EA&kZR] vze|*dKS qWb 8" return nFileLength; {|R +|ow } la89>pF h3z9}' *M+ CA_I( //保存下载信息(文件指针位置) A5%cgr% 6 private void write_nPos() ky@DH(^> { /[>zFYaQ try{ ~
ve output = new DataOutputStream(new FileOutputStream(tmpFile)); $QJ,V~ output.writeInt(nStartPos.length); 4\(|V
fy for(int i=0;i<nStartPos.length;i++) ,Zb_Pu { .5+5ca // output.writeLong(nPos); #E@X'jwu output.writeLong(fileSplitterFetch.nStartPos); vz`r
!xj) output.writeLong(fileSplitterFetch.nEndPos); @S?D}myD } J9XV:)Yv# output.close(); c}D>.x|] } yvV]|B@sO catch(IOException e){e.printStackTrace ();} 1L<X+,]@ catch(Exception e){e.printStackTrace ();} G33'Cgo:, } xqzB=0 MFsW }Fb966 $ //读取保存的下载信息(文件指针位置) E9:p A5H-j private void read_nPos() yI8
/m| { Tizjh&*^ try{ T*zy^we DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); yrV]I(Xe int nCount = input.readInt(); <<+Hs/ ] nStartPos = new long[nCount]; bXK$H=S Bz nEndPos = new long[nCount]; 2hE+Om^n for(int i=0;i<nStartPos.length;i++) Q7SRf$4 { XMm(D!6 nStartPos = input.readLong(); vL~j6'
nEndPos = input.readLong(); +*KDtqZjk } S<"`9r)av input.close(); ~ ]^<*R } +V/m V7FK catch(IOException e){e.printStackTrace ();} }BLT2]y0 catch(Exception e){e.printStackTrace ();} ]M/*Beh } J3AS"+] cT3 s{k tk'3Q 1L private void processErrorCode(int nErrorCode) G?v]|wdI { 0A.9<&Lod System.err.println("Error Code : " + nErrorCode); o3>D~9 } E?F?)!% T``~YoIdz _43 :1!os //停止文件下载 3R ZD=` public void siteStop() znu[i&\= { i`" L?3T bStop = true; JsbH'l for(int i=0;i<nStartPos.length;i++) (Q ~<> fileSplitterFetch.splitterStop(); D8wZC'7 I>45xVA LKI2R_|n } M;1B}x@ } aXyg`CDv //负责部分文件的抓取 5'"l0EuD **FileSplitterFetch.java
Mgc|># = */ H&=3rkX package NetFox; Dv-ubki &*!) d" 5=9gH import java.io.*; iM{UB=C import java.net.*; ~OOD#/ j!hdi-aTU k{B;J\`E; public class FileSplitterFetch extends Thread { _-bEnF+/0 0O7VM)[ "uHU!)J#z String sURL; //File URL 6sl2vHzA long nStartPos; //File Snippet Start Position L+d4&x long nEndPos; //File Snippet End Position Y<9Lqc.i int nThreadID; //Thread's ID Q^\f,E\S boolean bDownOver = false; //Downing is over Pqb])-M9p boolean bStop = false; //Stop identical ]>k>Z#8E* FileAccessI fileAccessI = null; //File Access interface rc)vVv yB,{:kq7D :gacP? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException lO5*n|Ic, { \A/??8cgXs this.sURL = sURL; y/yg-\/XF this.nStartPos = nStart; {B+{2;Zk this.nEndPos = nEnd; "ba>.h,#' nThreadID = id; y|[YEY U) fileAccessI = new FileAccessI(sName,nStartPos);//定位 Y#aHGZ$i } rH5'+x K CHNIL^B _#rE6./@q public void run() d@,3P)? { +5IC-=ZB while(nStartPos < nEndPos && !bStop) _!C'oG6s? { {\zB'SNq Jb"0P`senY M8iI e:{ c try{ }wR&0<HA URL url = new URL(sURL); EHY}gG) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @8s:,Y_ httpConnection.setRequestProperty("User-Agent","NetFox"); QR]61v:` String sProperty = "bytes="+nStartPos+"-"; XH{P@2~l httpConnection.setRequestProperty("RANGE",sProperty); nPo YjQi Utility.log(sProperty); E<
Ini'od[ &Eqa y' $7JWA9#N! InputStream input = httpConnection.getInputStream(); @E@5/N6M //logResponseHead(httpConnection); j,i>
1|J v^QUYsar b^I(>l- byte[] b = new byte[1024]; GMRFZw_M int nRead; 8WvQ[cd while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v05B7^1@_ { 5/"&C-t nStartPos += fileAccessI.write(b,0,nRead); A~7q=- //if(nThreadID == 1) ;fnE"} // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "=ogO/_Q" } 8{iFxTz { WW!P,w N
J_#;t#j Utility.log("Thread " + nThreadID + " is over!"); wSP'pM{#2 bDownOver = true; 0?d}Oj //nPos = fileAccessI.write (b,0,nRead); _
BUD~'Q5 } qD/X% `>Q catch(Exception e){e.printStackTrace ();} i!9|R)c } It8m]FN } 9#A&Qvyywg 4x%R4tk |37y =" //打印回应的头信息 #X?#v7i",D public void logResponseHead(HttpURLConnection con) m? #J`?E { ?IHa>f: for(int i=1;;i++) 7o5~J)qIC { JK@"
& String header=con.getHeaderFieldKey(i);
;'g.% if(header!=null) (D5.NB%@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); K$(LiP Utility.log(header+" : "+con.getHeaderField(header)); E A8>{}Z*
else ); <Le6 break; fPLi8`r } _onEXrM } ]t|- 1}"PLq( x%\m/_5w% public void splitterStop() 9?~K"+-SI { s$ v<p(yl bStop = true; "P_PqM } )]~;Ac^x ~GZpAPg* !c 3li . } ELWm>'Q#9 ij/5m-{6) P:8P>#L /* 7w]NG`7 **FileAccess.java -w#Hy>E *//文件访问(定位,写) Sd0y=!Pj= package NetFox; n:P5m9T import java.io.*; jLLZZPBK +S3r]D3v/ NDv_@V(D public class FileAccessI implements Serializable{ )Ap0" ?q gvx
{;e //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~^u#Q\KE" RandomAccessFile oSavedFile; JIobs*e0m long nPos; x\m?* 5p HECZZnM V% c1+h < public FileAccessI() throws IOException uI*2}Q { eGJ}';O,g this("",0); W7ffdODb } 7<ZCeM2x ;0!rq^JG {_{&t>s2 public FileAccessI(String sName,long nPos) throws IOException KASw3!.W { PN&;3z Z oSavedFile = new RandomAccessFile(sName,"rw"); jdF~0#vH this.nPos = nPos; (GNY::3 oSavedFile.seek(nPos); R#QcQx } WO=,NQOw i[wEH1jR ;.g <u public synchronized int write(byte[] b,int nStart,int nLen) p*^[
~} N { F;&a=R!. int n = -1; DY~zi try{ ~Uet)y< oSavedFile.write(b,nStart,nLen); oy)'wb~ n = nLen; Pd[&&!+gV } itg
PG catch(IOException e) , Q5Z<\
{ *ydU3LG7 e.printStackTrace (); D`G ;kp } XtV=Gr8" %?7j
Q 0R0j7\{ return n; XZk?aik}` } jPjFp35;zb Td`0;R'<}c dGrm1w } [MkXQwY 5ma*&Q8+ [7:(e/& /* '#fwNbD **SiteInfoBean.java 3~%wA(|A */ ?l3PDorR package NetFox; ,X2CV INb} ?_+h+{/@B '*PJ-=G public class SiteInfoBean { *&\fBi] #)r
{J}Zv5 private String sSiteURL; //Site's URL }gr6naz private String sFilePath; //Saved File's Path q-;z!iq|! private String sFileName; //Saved File's Name iw$n*1M private int nSplitter; //Count of Splited Downloading File ;6?VkF \R0&*cnmo a_pNFe public SiteInfoBean() \2K_"5 {//nSplitter的缺省值为5 BZP~m=kq //default value of nSplitter is 5 m'Thm{Y,?n this("","","",5); gUcG# } 9?
#pqw -]?F v$H]=y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ft"B, { ftqi >^i sSiteURL= sURL; 2bB&/Uumsd sFilePath = sPath; wV9[Jl\Z sFileName = sName; Hz&.]yts2J this.nSplitter = nSpiltter; 2JV,AZf 6S~lgH: U# jbii6e } d`_X$P4y 42Gv]X "t{|e6
public String getSSiteURL() fgg;WXcT ~ { /puM3ZN return sSiteURL; lP!`lhc-^ } Dm"@59x *W#_W]Tu nEZoF public void setSSiteURL(String value) FE`:1 { jtMN )TM sSiteURL = value; c&Mci"nj0 } Iaq7<$XU k lRS:\dW +{$NN public String getSFilePath() d `z),A= { O=HT3gp& return sFilePath; BtSl%(w } Felu`@b 9Okb)K95 QzwA*\G public void setSFilePath(String value) ~olta\| { k-v@sb24_ sFilePath = value; em87`Hj^lo } *uLlf'qU] i_? S#L]h O;NQJ$^bI public String getSFileName() 2VNMz[W' { *o/Q# return sFileName; 0<{+M` G/ } ]yxRaW9f a-t}L{~ :\+;5Se+l public void setSFileName(String value) Tn~b#-0 { 8h&Ed=gi sFileName = value; Hd1e9Q,:| } ;t.LLd 8( ^;h2O! >taC_f06 public int getNSplitter() )$* T>.JA { o*OaYF'8 return nSplitter; RtrESwtR } >k6RmN 7PDz ]i OZ*V7o public void setNSplitter(int nCount) Bu ~N)^ { IT3xX=|b nSplitter = nCount; H+]>*^'8 } +%$'(ts } vGK'U*gGD `YDe<@6' B r GaCja /* DQ{Yr>J **Utility.java >f [Lb|t */ 6#/Riu% package NetFox; L}bS"=B[&W ? jywW$ <c[+60p" public class Utility { ,FvBZ.4c3= :
kVEB<G .c[v /SB] public Utility() MCOz-8@|Y { =R08B)yR Rw$>()}H8 $J>J@4 } >Lh+(M;+F F[Dhj,C" //线程睡眠 k!gft'iU public static void sleep(int nSecond) ,[To)x5o { a *n^( try{ N7=L^] Thread.sleep(nSecond); L{K:XiPn } {2`:7U~| catch(Exception e) 1M|DaAI { 4s?x 8oAy e.printStackTrace (); -r9G5Z!|n } x0ZEVa0`4 } p{knQ], Rc2| o.'y //日志 w l.#{@J]< public static void log(String sMsg) A$K>:Tt> { (fc
/"B- System.err.println(sMsg); r-#23iT.~ } f)xHSF" gDP\u<2! ^^[MDjNy@ public static void log(int sMsg) O]OZt,k( { }MKm>N System.err.println(sMsg); %Lec\(-4L } 4{Vw30DZ } 6e1/h@p\7 %4:tRF o|\0IG(\ /* ?QGAiu0 **TestMethod.java aB9Pdut */ ?UAB}CjY package NetFox; IfHB+H
/n=
%# { ,LjB%f[ public class TestMethod { xP<cF ;~Eb Q $:I~y|
!1 public TestMethod() @D!KFJ { ///xx/weblogic60b2_win.exe 0ad -4 try{ Jsi [,|G SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); uf;^yQi //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $9v:(:!Bm SiteFileFetch fileFetch = new SiteFileFetch(bean); y6|&bJ @ fileFetch.start(); T<*i($
[ } ~Uw**PT3M catch(Exception e){e.printStackTrace ();} 6,j6,Q(67 qGtXReK =;.#Bds } `3!ERQU 9QaEUy*, ,Mf@I5? public static void main(String[] args) [gZd$9a { D*d@<&Bl4< new TestMethod(); }-H<wQ&x } $QQv$ } bd[zdL#4K 点击下载更多相关资料
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