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/* 9[0iIT$q$ **SiteFileFetch.java DHO]RRGV */ DH(<{ #u package NetFox; FQZ*i\G>> import java.io.*; TGCB=e import java.net.*; f{sT*_at j}+3+ 8D >ahDc!Jyu public class SiteFileFetch extends Thread { 8U{D)KgS 5zl+M` ? x)^f+:9| SiteInfoBean siteInfoBean = null; //文件信息Bean ! ]4u"e long[] nStartPos; //开始位置 M:+CW;||! long[] nEndPos; //结束位置 ,-UF5U FileSplitterFetch[] fileSplitterFetch; //子线程对象 KOcB#UHJ long nFileLength; //文件长度 H/,KY/>i boolean bFirst = true; //是否第一次取文件 eaw!5]huu boolean bStop = false; //停止标志 ^m\o(R File tmpFile; //文件下载的临时信息 Kd\0nf6 DataOutputStream output; //输出到文件的输出流 LmrdVSs_ &.A_d+K& //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) wi2`5G6|z public SiteFileFetch(SiteInfoBean bean) throws IOException ^z?b6kTC { (v]%kXy/G siteInfoBean = bean; 3?93Pj3oPt //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3[m~-8 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); R"nB4R0Uh if(tmpFile.exists ()) g4?2'G5m? { RY-iFydPc bFirst = false; R5HT
EB read_nPos(); WtM%(8Y[] } -cgO]q+Oq else ipSMmpB { +H-=`+, nStartPos = new long[bean.getNSplitter()]; ]!hjKu" nEndPos = new long[bean.getNSplitter()]; "{0G,tdA } #CS>_qe.{ BQu
|qrq T.bFB+'E| `PWKA;W$0 } #:)'D?, eg[EFI.h t@%w:*& public void run() ^~4]"J};M { N?\X2J1 //获得文件长度 5P,&VB8L //分割文件 V?mP7 //实例FileSplitterFetch bWFa{W5! //启动FileSplitterFetch线程 PRhC1# //等待子线程返回 aV;|2}q " try{ w-|Rb~XT
h if(bFirst)
@|gG3 { UHl3/m7g nFileLength = getFileSize(); ]ch=@IV if(nFileLength == -1) C,| & { GS;GJsAs System.err.println("File Length is not known!"); pc`P;Eui } j<AOC? else if(nFileLength == -2) P{Nvt/% { >y%H2][ System.err.println("File is not access!"); LuS@Kf8N+ } bZowc {!\ else *xnZTj: { z'L0YqXG/ for(int i=0;i<nStartPos.length;i++) ~Ntk-p { w{ja*F6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); _){|/Zd } g/GI'8EMj for(int i=0;i<nEndPos.length-1;i++) [&TF]az { |$WHw*F^ nEndPos = nStartPos[i+1]; *i"9D: } xm m,-u nEndPos[nEndPos.length-1] = nFileLength; o/AG9|()4 } ~j!n`#.\ } i"Jy>' (4H\ho8+mp SioeIXU //启动子线程 h.<f%&)F fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; d`sZ"8}j for(int i=0;i<nStartPos.length;i++) vC]X>P5 Px { *byUqY3( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i?T-6{3I siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q 3WD!Z8y nStartPos,nEndPos,i); cU;Bm}U Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w2B)$u fileSplitterFetch.start(); wNa5qp
0 } =!TUf/O- // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L>Y+}]~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C[FHqo9M?H // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", PT>b%7Of nEndPos = " + nFileLength); @A[)\E1 // fileSplitterFetch[nPos.length-1].start(); %. 1/#{ 1]xmOx[mb n_kwtWX( //等待子线程结束 \8CCa(H //int count = 0; >}SEU-7&\ //是否结束while循环 GcO2oq boolean breakWhile = false; `KQx#c>' jg$qp%7i% 80nE QT
y while(!bStop) 6,t6~Uo/ { & SXw=;B write_nPos(); yP58H{hQM8 Utility.sleep(500); 7?dWAUF breakWhile = true; O-,
"/Z * +
T(i ! ._q8q\ for(int i=0;i<nStartPos.length;i++) &}DfIP< { y##h(y if(!fileSplitterFetch.bDownOver) .}__XWK5 { CW1l;uwtU breakWhile = false; 9p_?t'&>q break; @a8lF$< } Tm"H9 } oidZWy if(breakWhile) Jm_)}dj3o break; '_v~+ V%-hP~nyBx qda 2 //count++; ebA:Sq:w //if(count>4) dIC\U // siteStop(); 0)&!$@HW } x%dny]O1; VMah3T! %lCZ7z2o System.err.println("文件下载结束!"); H-_gd.VD } !Fl'?Kz catch(Exception e){e.printStackTrace ();} g*$2qKm } 12`u[O}\}- >axeUd+@i w$
8r<?^3 //获得文件长度 cSt)Na~C public long getFileSize() e!VtDJDS { <+QdBp'd; int nFileLength = -1; GDLw_usV try{ xvl$,\iqE URL url = new URL(siteInfoBean.getSSiteURL()); v ,")XPY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8maWF.xq httpConnection.setRequestProperty("User-Agent","NetFox"); x/,;:S 12 p`ZD= 9E7 G%- int responseCode=httpConnection.getResponseCode(); t}+/GSwT if(responseCode>=400) TpU\IQ { tF;0P\i processErrorCode(responseCode); =Jm[1Mgt return -2; //-2 represent access is error ^s)`UZ<C= } W9SU1{*9 0? {ADQz 4*EMd!E=< String sHeader; ,YD7p= PY kjYM&q Dg&6@c| for(int i=1;;i++) x^1udK^re { v3r3$(Hr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?V6,>e_+ //Utility.log(in.readLine()); #E]K*mE' sHeader=httpConnection.getHeaderFieldKey(i); #/>TuJc if(sHeader!=null) um,f!ho-U { FGDVBUY@
if(sHeader.equals("Content-Length"))
0pE>O7 { =:rg1wo"c nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $tZ
{>!N break; 5`^@k< } SAP/jD$5]> } N{%7OG else Vk{;g break; zYzV!s2^ } P j } C|ZPnm>f30 catch(IOException e){e.printStackTrace ();} R U)(|; catch(Exception e){e.printStackTrace ();} wn"}<ka "B QnP9 Z- feMM Utility.log(nFileLength); C8m 9H8Qm W3le)& I}PI return nFileLength; C]!2 } 9q'&tU'a=c kY)Vr3uGA i$NlS}W //保存下载信息(文件指针位置) ( d_z\U7l private void write_nPos() ](Fey0@ { /DAR'9@h try{ J?o output = new DataOutputStream(new FileOutputStream(tmpFile)); qb? <u output.writeInt(nStartPos.length); !
I:N< for(int i=0;i<nStartPos.length;i++) kX8C'D4 gX { Yw|v5/> // output.writeLong(nPos); hl1IG
! output.writeLong(fileSplitterFetch.nStartPos); 8^>qor.]M output.writeLong(fileSplitterFetch.nEndPos); /2p*uv}IP } &N^j
}^ Z output.close(); = wz}yfdrC } }zGx0Q catch(IOException e){e.printStackTrace ();} |.k'?! catch(Exception e){e.printStackTrace ();} g* YDgY } J5{;+ysUMl ?c#s}IH -Q20af- //读取保存的下载信息(文件指针位置) c5ij2X|I private void read_nPos() Y5aG^wE[: { E0ED[d, try{ ^8
VW$} DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); KW:N
6w int nCount = input.readInt(); I[?\Or nStartPos = new long[nCount]; nXT`7 nEndPos = new long[nCount]; =v:?rY} for(int i=0;i<nStartPos.length;i++) gkr9+ { 81Z;hO"~ nStartPos = input.readLong();
f"s_dR nEndPos = input.readLong(); \]>YLyG } L$5,RUy input.close(); 6q^$}eOt } FJ3S
catch(IOException e){e.printStackTrace ();} @1*^ttC catch(Exception e){e.printStackTrace ();} phy}Hk/ } O=jLZ2os zM0}(5$m sT?{ private void processErrorCode(int nErrorCode) e"hfeNphz { Uj5-x%~ System.err.println("Error Code : " + nErrorCode); h4]^~stI } iwF_'I$#N 'WW:'[Syn' @}
Ig*@ //停止文件下载 cQEUHhRg! public void siteStop() FI^Wh7J { FOF@@C~aH bStop = true; }y6|H,t9 for(int i=0;i<nStartPos.length;i++) %Y&48''" fileSplitterFetch.splitterStop(); M/ 64`lcb j!4{+&Laq X /c8XLe" } JVoC2Z< } ^5X?WA,Z99 //负责部分文件的抓取 X$!fR >Zc **FileSplitterFetch.java x17:~[c'] */ HTL6;87w+] package NetFox; ':n`0+Eh e0(/(E: \HO)ss)" import java.io.*; GxhE5f; import java.net.*; |u>V>
PN v.]{b8RR $5XAS public class FileSplitterFetch extends Thread { Cfi4~ & BdD]HXB|_ %r|sb=(yT String sURL; //File URL t=Oq<r long nStartPos; //File Snippet Start Position Tf3CyH!k long nEndPos; //File Snippet End Position S/E&&{`ls int nThreadID; //Thread's ID "WKOlfPa boolean bDownOver = false; //Downing is over QATRrIj{e boolean bStop = false; //Stop identical Bc8&-eZ, FileAccessI fileAccessI = null; //File Access interface DXf "1,*6(;: 9 :2Bt <q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException m.+h@ { jG1(Oe;# this.sURL = sURL; hNXZL>6 this.nStartPos = nStart; *J4!+GD this.nEndPos = nEnd; ^os_j39N9 nThreadID = id; {dF@Vg_n fileAccessI = new FileAccessI(sName,nStartPos);//定位 L -Q8iFW' } #zP-,2!r @V
' HX $+80V{J# public void run() DzR,ou { !
yJ0Am> while(nStartPos < nEndPos && !bStop) 0BXr[%{` { eay|>xa2 atZe`0 2.Z#\6Vj try{ ^;F/^_ URL url = new URL(sURL); fizW\f8ai HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); & R_?6*n httpConnection.setRequestProperty("User-Agent","NetFox"); ovp/DM String sProperty = "bytes="+nStartPos+"-"; Qhj']>#g httpConnection.setRequestProperty("RANGE",sProperty); 1i#y>fUj Utility.log(sProperty); !SK`!/7c? X2V+cre ;y(;7n_ a InputStream input = httpConnection.getInputStream(); IT NFmD //logResponseHead(httpConnection); OP\jO DX \lg
^rfj 7I
~O|Mw byte[] b = new byte[1024]; 1KUjb@" int nRead; |pHlBzHj while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
P7w
RX F{ { ku,{NY
f^Y nStartPos += fileAccessI.write(b,0,nRead); O[ z0+Q?6Z //if(nThreadID == 1) &KMI C // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Lyc6nP;F
} +[
?!@) ` +YtTK #H7
SLQr\ Utility.log("Thread " + nThreadID + " is over!"); JLm3qIC bDownOver = true; Dspvc //nPos = fileAccessI.write (b,0,nRead); |-ZML~2S=h } vP,pK=5 catch(Exception e){e.printStackTrace ();} Zd-qBOB2L } 6
5zx< } hr]+4!/ Vja 4WK* Un8' P8C //打印回应的头信息 (EcP'F*;;y public void logResponseHead(HttpURLConnection con) pT=^o { [.>=>KJ_ for(int i=1;;i++) 79 4UY { K1X-<5]{ String header=con.getHeaderFieldKey(i); M.Q
HE2 if(header!=null) 4AL,=C3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); PV\J]
|d,% Utility.log(header+" : "+con.getHeaderField(header)); {-I+ else c!HGiqp break; oOprzxf"+Z } *m]Y6 } {*;8`+R& K\ Wzh; g#i~^4-1 public void splitterStop() x"Ll/E)\v] { Pt85q?- > bStop = true; _xAru9=n^ } vk|f"I B{\Y~>]Pj KGDN)@D } (LsVd2AbR d_(>:|oh z$1|D{ /* Vl+UC1M}B> **FileAccess.java EPW4
h/I *//文件访问(定位,写) hRXnig{;3 package NetFox; @N '_qu import java.io.*; Z4G%Ve[ 1^^{;R7N &PXT$x[i public class FileAccessI implements Serializable{ oC"
[rn a)W|gx6Y //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Y
22Ai RandomAccessFile oSavedFile; pF6u3] long nPos; o;wSG81 o.r D l'm|** public FileAccessI() throws IOException ~H#c-B { |};d:LwX this("",0); #qVvh3#g } w &YUb,{Y ?J6Ek*E# #NyO' public FileAccessI(String sName,long nPos) throws IOException )7Hx<?P { RNB-W% oSavedFile = new RandomAccessFile(sName,"rw"); bCP2_h3* this.nPos = nPos; "{@[06|1 oSavedFile.seek(nPos); ps:"0^7 } `\:Ede &(<>}
r <`-sS]=d} public synchronized int write(byte[] b,int nStart,int nLen) o.Ww.F { QN;5+p[N int n = -1; Mm,\e6#* try{ M5RN Z% oSavedFile.write(b,nStart,nLen); M
p<r`PM2 n = nLen; #<Y3*^~5d } CSjd&G*ZB catch(IOException e) 3_G0eIE"u { i<m)
s$u e.printStackTrace (); dSjO12b } 7_3 6xpw gHh(QRA "E7<S5cr return n; >lmqPuf } aVHID{Gf Z +uF}mZS^ \a0{9Xx F } ir}*E=* u0)O Fz Vxrj(knck, /* M&=SvM.f **SiteInfoBean.java fiC0'4., */ ?v,c) package NetFox; tMdSdJ8 V1P]pP ?$)a[UnqX public class SiteInfoBean { <9H3d7% Q7pCF,; F+VNrt- private String sSiteURL; //Site's URL Lm!]m\LRZD private String sFilePath; //Saved File's Path ox<6qW private String sFileName; //Saved File's Name &!;o[joG private int nSplitter; //Count of Splited Downloading File >~7XBb08 3;b)pQ~6CJ mGg/F&G9 public SiteInfoBean() {88|J'*L {//nSplitter的缺省值为5 D',7 T=C
//default value of nSplitter is 5 yS
K81` this("","","",5); `tO t+>YWn } @lM-+q(tl B]hRYU r]}6iF. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <%^WZ:c { <% mD#S sSiteURL= sURL; 6;~V@t sFilePath = sPath; o
S{hv:)> sFileName = sName; b!MN QGs this.nSplitter = nSpiltter; <Ed; tq 9pi{)PDJ Q7`)&^
Hx } @)MG&X jB9~'>JY S_*Gv O public String getSSiteURL() rpEIDhHv { 2T%sHp~qt return sSiteURL; e6J>qwD? } kDJqT |61ns6i! 4TQmEM, public void setSSiteURL(String value) Dg~m}La { eo;MFd%; sSiteURL = value; AD!w:jT9 } f"\klfrRI_ #v$wjqK5 -1$z=,q' public String getSFilePath() (!m6>m2 { IrRe6nf@K return sFilePath; :Eh}]_ } GXLh(d!C d/+s-g p g>7i2 public void setSFilePath(String value) "tOm { %Y/;jCY sFilePath = value; bFG?mG: } {[bpvK pi70^`@ 'B [Djx@x public String getSFileName() | Wj=%Ol%o { '8R5Tl return sFileName; $AZ=;iP- } g;q.vHvsc" @b2?BSdUp 1Xh@x public void setSFileName(String value) T.QJ#vKO0 { "Ar|i8^G3 sFileName = value; [#X}( } x~m$(LT ~Sf'bj;( -d2) public int getNSplitter() 7Kj7or| { 4!3<[J;N; return nSplitter; ~kpa J'm } :|&6x!
v9TIEmZ W4#DeT public void setNSplitter(int nCount) ^K8XY@{& { AfZGI'%4[a nSplitter = nCount; \Lb wfd= } g rI#' x } ;K4=fHl k^KpQ&n j)nE!GKD( /* Mj2Dat`p9 **Utility.java EKw)\T1 */ aWvC-vZk package NetFox; zLxuxf~4@ [P6A$HC< BTOl`U public class Utility { lR
F5/ TR
`C|TV> Zu~t )W public Utility() 2h}FotlO { "-5FUKI- qauvwAMuX lA6{TH.x } pp#!sRUKPV %k"hzjXAw //线程睡眠 -IDhK}C&T public static void sleep(int nSecond) =_6 Q26 { yk^2<?z>2 try{
A;^{%S Thread.sleep(nSecond); x a\~(B. } 23+JuXC6> catch(Exception e) ':
Ek3' L { VY|UB7,C e.printStackTrace (); n~jW }
D4@(_6^ }
Du-Q~I6 ]|Ie E!6 //日志 WhFE{-!gX public static void log(String sMsg) vZ6R>f
{ P $r!u%W System.err.println(sMsg); J!Rqm!)q } VVuNU"- f*m^x7 I;<__ public static void log(int sMsg) l4I',79l { Y_XRf8Sw System.err.println(sMsg); jrm^n_6}; } R(}!gv}s } ; d}n89DXj %X\Rfn0J" A-^B?E /* ;?-{Uk **TestMethod.java E1A5<^t */ O|9Nl*rXz package NetFox; q}E'x/s2m h9nh9a(2 hA`9[58/ public class TestMethod { 0N6 X;M{zh ,oEAWNbgQ K)\D,5X^ public TestMethod() d(5j#? { ///xx/weblogic60b2_win.exe p-z!i +
try{ .Rb4zLYL*w SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Vrp]YRL` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D [v22 5 SiteFileFetch fileFetch = new SiteFileFetch(bean); mndEB!b fileFetch.start(); ,yfJjV*I } JmBMc}54 catch(Exception e){e.printStackTrace ();} c[C(3c|n
ILHn~d IC g,RhUt9 } ;>]dwsA*P Z]OX6G 0h('@Hb.K# public static void main(String[] args) 4i29nq^n { ,M\/[_: new TestMethod(); LG?b]'# } bvJ*REPL? } +xr;X 9 点击下载更多相关资料
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