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/* =>c0NT **SiteFileFetch.java &l]F&- */ E_A5KLP package NetFox; AEnkx!o import java.io.*; KG(FA import java.net.*; VT4>6u} E"p _!!1 H/M]YUs/3 public class SiteFileFetch extends Thread { tlD^"eq4: k"gm;,` ~ L%,9 SiteInfoBean siteInfoBean = null; //文件信息Bean /v<Gt%3X long[] nStartPos; //开始位置 FO[ s;dmzu long[] nEndPos; //结束位置 iOhX\@& FileSplitterFetch[] fileSplitterFetch; //子线程对象 Q`'cxx long nFileLength; //文件长度 3=oxT6"k boolean bFirst = true; //是否第一次取文件 fA<os+*9i boolean bStop = false; //停止标志 [Q8Wy/o
Q File tmpFile; //文件下载的临时信息 H'udxPF DataOutputStream output; //输出到文件的输出流 hM!g6\ w zj2y=A|Y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !m~r0M7 public SiteFileFetch(SiteInfoBean bean) throws IOException %pOxt< { 9#1?Pt^{< siteInfoBean = bean; s 7wA3|9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); h@*I(ND< tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~a2|W|? if(tmpFile.exists ()) %hBwc#^ { >6&Rytcc] bFirst = false; q9{ h@y read_nPos(); ltkARc3 } :d35?[ else TAOsg0 { ;PG=
3j_ nStartPos = new long[bean.getNSplitter()]; $v2t6wS," nEndPos = new long[bean.getNSplitter()]; {g[kn^| } ndDF(qHr "AXgT[ O DAf@-~c Q.jThP`p } >)NS U 'L7u` @N<h`vDa public void run() dQrz+_ { .
4RU'9M //获得文件长度 NpM;vO //分割文件 <w*WL_P //实例FileSplitterFetch ct=K.m@E%X //启动FileSplitterFetch线程 -&1P2m/46 //等待子线程返回 wsQuJrG try{ x|d? ' if(bFirst) PWp=}f.y { /%7&De6Xg nFileLength = getFileSize(); 7D>_<)%d= if(nFileLength == -1) 95j`^M)Q { Tr}XG System.err.println("File Length is not known!"); ep},~tPZn } V8WSJ=-&
else if(nFileLength == -2) Z*b l J5YC { B>cT<B System.err.println("File is not access!"); l+&DBw[ } X-"
+nThMn else #/H2p`5 { ~;]zEq-hG for(int i=0;i<nStartPos.length;i++) TUwX4X6m { x)eF{%QB nStartPos = (long)(i*(nFileLength/nStartPos.length)); =a+
} 6 } 2/A*\ for(int i=0;i<nEndPos.length-1;i++) 9* 3;v;F { =~W=} nEndPos = nStartPos[i+1]; ci2Z_JA+ } ^C~R)M:C nEndPos[nEndPos.length-1] = nFileLength; FAc^[~E } !wEe<], } hW!n"qU a
@3s71 4bw4!z9G //启动子线程 nJYIkfdA fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; * Wp?0CP for(int i=0;i<nStartPos.length;i++) \I}EWI { ^ZS!1%1 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @x!+_z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ,H.5TQ# nStartPos,nEndPos,i); h0dZr-c Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -(lP8Y~gFY fileSplitterFetch.start(); kmu`sk" } 9I<~t@q5e@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }!Pty25j siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); umnQ$y
0 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =w`uZ;l$Q nEndPos = " + nFileLength); w 2U302TZ // fileSplitterFetch[nPos.length-1].start(); n`w]? bL Pe\Obd8d 2T?Y //等待子线程结束 T fIOS] //int count = 0; [Pjitw/? //是否结束while循环 c1a$J` boolean breakWhile = false; a-FI`Dv -nHkO&&R gzKMGL?%? while(!bStop) S!gzmkGcj { [iO8R-N8d write_nPos(); eGpKoq7a Utility.sleep(500); #+U1QOsz breakWhile = true; 1$C?+H zv/dj04> ?fC9)s for(int i=0;i<nStartPos.length;i++) d8 Jf3Mo { Wuk8&P3 if(!fileSplitterFetch.bDownOver) 0m> 8 { ]i0=3H2 breakWhile = false; U~?mW,iRL break; 6=,zkU*i^ } zd!%7
UP } xb0,dZb if(breakWhile) #%E^cGfY break;
!j% (=c,b9cb gzat!>* //count++; ,#GB //if(count>4) "zXrfn // siteStop(); UmGKj9u } p"jze3mF j%bC9UkE3 5cU:wc System.err.println("文件下载结束!"); Rcw[`q3/ } 's5rl catch(Exception e){e.printStackTrace ();} ~QPTs1Vk8 } BB69U gdqBT]j ]yqE6Lf9 //获得文件长度 EH M 59s|B public long getFileSize() }#4Ek8nFR { &?1^/]'"r int nFileLength = -1; <~w 3[i=
try{ ln8NcAEx URL url = new URL(siteInfoBean.getSSiteURL()); P*|=Z>%[0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5=#d#dDc httpConnection.setRequestProperty("User-Agent","NetFox"); emrA!<w!W p-EU"O VMJaL}J] int responseCode=httpConnection.getResponseCode(); k%O3\q if(responseCode>=400) ]'Ho)Q { _$D!"z7i processErrorCode(responseCode); h.ftl2> return -2; //-2 represent access is error qAbmQ{|w } fXl2i]L(^B ]sVWQj I"lzOD; eI String sHeader; 8{i}^.p ?r8hl.Z> $Q'z9ghEg for(int i=1;;i++) f$-n%7 { 55$';gh,9 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); sb8bCEm-\ //Utility.log(in.readLine()); 7_)38 sHeader=httpConnection.getHeaderFieldKey(i); _TsN%)m if(sHeader!=null) 1t?OD_d!8 { A9K$:mL<2 if(sHeader.equals("Content-Length")) cRbA+0m> { 39P55B/o% nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >C6S2ISSz break; 2@z .ory. } )b2O!p } tAJ}36aG else Q#qfuwz break; u'_}4qhCC; } 2?Jw0Wq5D } .S/zxf~h catch(IOException e){e.printStackTrace ();} C3f\E: D) catch(Exception e){e.printStackTrace ();} 6hYz^}2g w4TQ4
Y '2<r{ Utility.log(nFileLength); NqOX);'L0 (6a<{ ?fq!BV return nFileLength; +By '6?22 } <)(W7#Ks HKT, 5 oS9Od8 //保存下载信息(文件指针位置) ~@xPoD& private void write_nPos() BQg3+w:> { &V(6N%A^U try{ `Z5dRLrd output = new DataOutputStream(new FileOutputStream(tmpFile)); mR
XRuK output.writeInt(nStartPos.length); x`@`y7( for(int i=0;i<nStartPos.length;i++) Ny$3$5/ { GQ@mQ=i // output.writeLong(nPos); /Qr`au output.writeLong(fileSplitterFetch.nStartPos); I{[Z
output.writeLong(fileSplitterFetch.nEndPos); .43cI( } Gbclu.4 output.close(); Vym0|cW } w"dKOdY catch(IOException e){e.printStackTrace ();} ~XuV:K3 catch(Exception e){e.printStackTrace ();} YCxwIzIR } M_ %-A Khc^q*|C) 0^uUt- //读取保存的下载信息(文件指针位置) ~:f..|JM private void read_nPos() aHpZhR|f$ { ZBY2,%nAo try{ +> !nqp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \$Wpt#V int nCount = input.readInt(); u?dPCgs;h nStartPos = new long[nCount]; {xov8M nEndPos = new long[nCount]; 3Xd:LDZ{ for(int i=0;i<nStartPos.length;i++) 5toa@#Bc% { AL3iNkEa nStartPos = input.readLong(); t ;h`nH[ nEndPos = input.readLong(); z5M6 } {en'8kS input.close(); HSROgBNI: } a <?~1pWtc catch(IOException e){e.printStackTrace ();} 5~IdWwG*w catch(Exception e){e.printStackTrace ();} sr&W+4T } z
rSPa\M I%a-5f$0 fDqT7}L private void processErrorCode(int nErrorCode) x:!s+q`
s { bl^Ihza System.err.println("Error Code : " + nErrorCode); .yXqa"p } -q{N1?tcy g:JSy 'gs P9 //停止文件下载 SKnYeT public void siteStop() 23L>)Q { O |P<s+ bStop = true; +8N6tw/& for(int i=0;i<nStartPos.length;i++) 6Nn+7z<*&z fileSplitterFetch.splitterStop(); 8t*sp-cy| At=d//5FFP N=2T~M 1 } C,l,fT } Qm[s"pM //负责部分文件的抓取 hd9HM5{p **FileSplitterFetch.java (M$>*O3SR */ 4l%W]' package NetFox; Hh=fv~X |> ]@w\] Wmcd{MOS import java.io.*; EC,`t*< import java.net.*; MU
a[}? QE[<Y3M .aY$-Y< public class FileSplitterFetch extends Thread { !KK `+ 9/ c5WMN.z pl&nr7\ String sURL; //File URL ur'<8pDb$ long nStartPos; //File Snippet Start Position Kh$"5dy long nEndPos; //File Snippet End Position #Iz)Mu int nThreadID; //Thread's ID J}xM+l7uY boolean bDownOver = false; //Downing is over lRg?||1ik boolean bStop = false; //Stop identical eZT8gKbjJ) FileAccessI fileAccessI = null; //File Access interface 1a{3k#} &Z]}rn Z@+nkTJ9&t public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /v5A)A$7 { 8ex;g^e this.sURL = sURL; NC-K`) this.nStartPos = nStart; _`\!+qGq this.nEndPos = nEnd; YWH>tt9 nThreadID = id; oxc;DfJ_ fileAccessI = new FileAccessI(sName,nStartPos);//定位 PJN9[Y{^3 } B1nm?E 0i C&w0HoF &F~d~;G"q public void run() o(jLirnk { ZJBb%d1; while(nStartPos < nEndPos && !bStop) tjXg { iVZ}+Ct<" xE?KJ zs#-E_^%M try{ e3;D1@ URL url = new URL(sURL); \Yr*x7! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d%'#-w' httpConnection.setRequestProperty("User-Agent","NetFox"); B0Wf$
s^7t String sProperty = "bytes="+nStartPos+"-"; v~L\[&|_ httpConnection.setRequestProperty("RANGE",sProperty);
FJ~d&L\l Utility.log(sProperty); /y-D_ I{(!h90 lgU!D |v InputStream input = httpConnection.getInputStream(); BVb^ xL //logResponseHead(httpConnection); LsERcjwwK ^ l]!'" /)_4QSz7 byte[] b = new byte[1024]; 08nh y[ int nRead; Wds>'zzS while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c 1F^Gj!8 { K& ^qn& nStartPos += fileAccessI.write(b,0,nRead); lUEbxN //if(nThreadID == 1) Nz`8)Le // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "crR{OjE" } T/P\j0hR I &iyj99n $oQOOa@;i) Utility.log("Thread " + nThreadID + " is over!"); J2VPOn bDownOver = true; ;`7~Q //nPos = fileAccessI.write (b,0,nRead); h76j|1gI } 9t\14tVwx catch(Exception e){e.printStackTrace ();} %MHL@Nn>e } La1:WYt } |cY HH$ %;:![?M
W$hCI)m( //打印回应的头信息 *P*~CHx> public void logResponseHead(HttpURLConnection con) :[n~(~7? { ,nteIR'?? for(int i=1;;i++) u?72]?SM { K _VIk'RB String header=con.getHeaderFieldKey(i); ^R@)CIQ if(header!=null) 5 [~HL_u;, //responseHeaders.put(header,httpConnection.getHeaderField(header)); (]'wQ4iQ Utility.log(header+" : "+con.getHeaderField(header)); tB>!1}v else z]8Mv(eL break; s|<n7 =J } Q;3`T7 } x!GDS> g3kbsi7_: Gpxp8[ { public void splitterStop() Q"FN"uQ}x { ivo><"Y(r bStop = true; M8WjqTq } S,:!H@~B 1w7tRw }kmAUaa,Z } cF15Mm2 7/<~s]D[% TzaeE
/* =A6*;T"W **FileAccess.java kQ\ $0=6N9 *//文件访问(定位,写) /W,hOv package NetFox; 0 j!<eN= import java.io.*; _WWC8?6U 3:jxr xFp$JN public class FileAccessI implements Serializable{ zy$jTqDH m=9b/Nr4 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RM_%u=jC RandomAccessFile oSavedFile; ?+hEs =Xs long nPos; |k6+-
1~_ Iz+%wAZ|B6 O/#3QK public FileAccessI() throws IOException _=I1 { 'hr_g* i this("",0); M%ecWr!tj } !8UIyw m^L !_~ :(US um public FileAccessI(String sName,long nPos) throws IOException WZ?>F { Ne<S_u2nT oSavedFile = new RandomAccessFile(sName,"rw"); ~2rQ80_ this.nPos = nPos; K9xvog oSavedFile.seek(nPos); #>aq'47j } +g?uvXC& > .NLmzUX "G>d8GbIh public synchronized int write(byte[] b,int nStart,int nLen) n! 5(Z5= { A-4;$
QSm int n = -1; +&u/R')?6r try{ afX|R oSavedFile.write(b,nStart,nLen); ((]i}s0S n = nLen; [(*Eg!?W= } Y(6evo&IR catch(IOException e) E}9wzPs { &Pme4IHtm e.printStackTrace (); ~vDa2D<9% } {c)\}s(}F V $I8iVGL %(
7##f_ return n; P.Bwfa } | I:@: !%65YTxY- LI.WcI3uS } ShC$ue?Q ':_9o5I ktfm /* .:&`PaMt **SiteInfoBean.java mTu>S */ 9+9g (6 package NetFox; yOz6a :r V.
i{IW &X:;B' public class SiteInfoBean { =M-=94 F&!vtlV) fWJpy#/^*K private String sSiteURL; //Site's URL 2R,}
j@ private String sFilePath; //Saved File's Path >(P(!^[f private String sFileName; //Saved File's Name U:8]G private int nSplitter; //Count of Splited Downloading File z0LspRaz vW eg1 =cV|o] public SiteInfoBean() Z4Q]By:/L {//nSplitter的缺省值为5 %2dzx[s //default value of nSplitter is 5 u3qxG3 this("","","",5); ;8PO}{rD } giu{,gS0?M E`_T_O=P ?l%4
P5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 4F.,Y3 { P`@Rt sSiteURL= sURL; ] :LlOv$ sFilePath = sPath; U%bm{oVn sFileName = sName; z<9C- this.nSplitter = nSpiltter; !y XGAg, D*2*FDGI s i2@k } 3);P!W4> Mrgj*| $=diG public String getSSiteURL() hO[_ _j8 { |oU I2<" return sSiteURL; kiJ=C2'& } Hre&a!U <o|fH~?X c6 &k?Puy public void setSSiteURL(String value) <vWP_yy { v3cMPN sSiteURL = value; KwHN c\\ } kCD]& n[e C ynM:]*~K public String getSFilePath() ./;uhj { 94&t0j_ return sFilePath; .F$}a% } F8<G9#%s\ ByP<-Deh !0hyp |F:> public void setSFilePath(String value) \E,2VM@6 { [ x+-N7 sFilePath = value; y'`7zJ } .9e5@@VR ]wDqdD y7S qdZ ^D public String getSFileName() eY#^vB { wipl5O@L return sFileName; X<IW5* } oS$7k3s
fj 40MKf/9 \:Tq0|]Px public void setSFileName(String value) 9d|8c >
I { 8/j|=Q,5 sFileName = value; ` Ny(S2 } # *pB"L `},:dDHI :k?`gm$ public int getNSplitter() ;/kd.Q { B|a <=~ return nSplitter; VD&wO'U } @yb'h`f] M2ex
3m G{6@]72 public void setNSplitter(int nCount) 8D`+3 { Xj+_"0
# nSplitter = nCount; I2HV{1(i } i/-IjgM"- } Epp>L.?r .S|T{DMQ[ j;uUM6 /* `q]' ^EzJ **Utility.java @mZK[*Ak<* */ nI?*[y} package NetFox; @d{}M)6\! $!. [R} r4[=pfe25 public class Utility { 1lIs
jBo g IY6Ll6OK 2~hdJ/ public Utility() wN'S+4 { n:40T1:q ,=C ipL9] _+P*XY5 } 0
N7I:vJ p/_W*0/i //线程睡眠 A@|Z^T: public static void sleep(int nSecond) gYN;Fu-9Z { XGR63hXND try{ M:OZWYQ Thread.sleep(nSecond); 5P #._Em } T_2'=7 catch(Exception e) yn ofDGAf { uY)4y0 e.printStackTrace (); 7Fpa%N/WL } EwG+' nlE } ?MSZO]Q4+ [V_mF //日志 ha|2u(4 public static void log(String sMsg) X~m57bj { :CM-I_6 System.err.println(sMsg); 9$v\D3<Z } *-]k([wV &u|t{C#0 =.S2gO > public static void log(int sMsg) 2u_=i$xW { gYbvCs8O! System.err.println(sMsg); wT+60X' } YhglL!pC } l2W+VBn6 }`
`oojz OO/>}? ob /* zx"EAF{ **TestMethod.java Bi fI.2| */ D_<B^3w) package NetFox; JfJ ln[ yD3vq}U! }mp`!7?>O public class TestMethod { sCy.i/y "Ke_dM =>Ae]mi7 public TestMethod() Kc
r)W { ///xx/weblogic60b2_win.exe ;;UsHhbhI try{ IuPDr % SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~hk!N!J\ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); o+OX^F0 SiteFileFetch fileFetch = new SiteFileFetch(bean); W!8$:Ih_Z fileFetch.start(); UE_>@_T } BSy4
d> catch(Exception e){e.printStackTrace ();} 4V@0L GPAC0K^p vr47PM2al } (.oDxs()I FLPN#1 myXGMN$i public static void main(String[] args) *URY8a`bO { eWYet2!Q new TestMethod(); `mAYK)N } .-s!} P" } >oy%qLHe~t 点击下载更多相关资料
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