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/* grWmF3c# **SiteFileFetch.java $bdtiD */ a|5^4 J\% package NetFox; >anq1Kf import java.io.*; u.~`/O import java.net.*; O
S% {!]7=K)W9 R8(Bt73 public class SiteFileFetch extends Thread { +"8-)' Dmq_jt "$6 .L^9W SiteInfoBean siteInfoBean = null; //文件信息Bean A-GU:B long[] nStartPos; //开始位置 EH2a long[] nEndPos; //结束位置 ~;ZT<eCIA FileSplitterFetch[] fileSplitterFetch; //子线程对象 QswbIP/>:' long nFileLength; //文件长度 Lo-\;%y boolean bFirst = true; //是否第一次取文件 iFBH;O_~ boolean bStop = false; //停止标志 /'<Qk' File tmpFile; //文件下载的临时信息 S9@2-Oc DataOutputStream output; //输出到文件的输出流 6vL+qOd x CG397Y^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]\ DIJ>JZ public SiteFileFetch(SiteInfoBean bean) throws IOException M>m+VsJV { NBaXfWh siteInfoBean = bean; y'#i'0eeL //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G0^,@jF?b tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Uk0Fo(HY if(tmpFile.exists ()) \]$TBN
dJ4 { $ytlj1. bFirst = false; c'Mi9,q read_nPos(); bayDdR4T } E!SxO~ else g71|t7Q { 16Gp nb nStartPos = new long[bean.getNSplitter()]; 1*vt\,G nEndPos = new long[bean.getNSplitter()]; wB0Ke } 2nsW)bd q?TI(J+/ K2gg"#ft? ~P@6fK/M } ;G\RGU~ -NuRf# *<rBV`AP public void run() n `Ry! { g]a5%8*{ //获得文件长度 b$O1I[o //分割文件 $1< ~J //实例FileSplitterFetch 8*\PWl //启动FileSplitterFetch线程 E6njmdu //等待子线程返回 $Il:Yw_ try{ tLc9- if(bFirst) aH(B}wh{ { W^sH|2g nFileLength = getFileSize(); ZlEH3-Zv if(nFileLength == -1) KDUa0$" { 4qe!+!#$ System.err.println("File Length is not known!"); \&Bvh4Q } stcbM else if(nFileLength == -2) 9EI Oa/* { |',$5!:0O System.err.println("File is not access!"); H}}g\|r& } %"{jNC? else sn=_-uoU { 6Q}WX[| tQ for(int i=0;i<nStartPos.length;i++) k6|wiSyu { = U)e_q nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5$;#=WAY } NJ ];Ck for(int i=0;i<nEndPos.length-1;i++) f.X<Mo { e/*T,ZJ nEndPos = nStartPos[i+1]; pipO,n } +D&aE$< nEndPos[nEndPos.length-1] = nFileLength; [\ALT8vC?m } E%tGwbi7 } *~H\#N|x W2 p&LP b0n " J` //启动子线程 %M
KZ':m fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Wd78 bu| for(int i=0;i<nStartPos.length;i++) !T3b]0z { c^a Dr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @GrQ/F7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $CgR~D2G nStartPos,nEndPos,i); i<ug("/ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
<f+9wuZ fileSplitterFetch.start(); WD${f#]N } hNWZ1r~_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CpG]g>]L&[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =MCQNyf+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ;kv/(veQ1< nEndPos = " + nFileLength); [n!5!/g>j // fileSplitterFetch[nPos.length-1].start(); gdKn!; ,w# [Kc"L+H\ QW[
gDc //等待子线程结束 I&lb5'6D //int count = 0; b!hs|emo; //是否结束while循环 {6, l#z boolean breakWhile = false; Aq~}<qkIF+ /6@~XO)w [(65^Zl` while(!bStop) zv>3Tc0R { 'Bc{N^ write_nPos(); L2GUrf Utility.sleep(500); ln~;Osb breakWhile = true; M}cgVMW 5:r*em A\IQM^i for(int i=0;i<nStartPos.length;i++) IA$)E { ^}>Ie03m50 if(!fileSplitterFetch.bDownOver) v0|[w2Q2 { Dx1 w I breakWhile = false; F
)|0U~ break; (^)" qsB } B<}0r4T} } ~8#Ku,vEy if(breakWhile) _/(7: break; VP\'p1a vSf ?o\O fVJsVZ"6v` //count++; zVL"$ ) //if(count>4) `Fn6*_n // siteStop(); ja1WI } qT}AY.O%^ g82_KUkB Yc] System.err.println("文件下载结束!"); (}jYi*B } KOqp@K$ catch(Exception e){e.printStackTrace ();} W:z?w2{VI( } ]u\K}n6[q q[rBu9 `~ , //获得文件长度 |1z?#@BH public long getFileSize() iJH;OV;P { H)u<$y!8 int nFileLength = -1; Frxim try{ >^\}"dEvr URL url = new URL(siteInfoBean.getSSiteURL()); Z6Kw'3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); E/[<} ./ httpConnection.setRequestProperty("User-Agent","NetFox"); E?@batIrf KTzkJx |#x]FNg int responseCode=httpConnection.getResponseCode(); XX])B%* if(responseCode>=400) =^L?Sgg { PX%Y$` processErrorCode(responseCode); 4IEF{"c_8 return -2; //-2 represent access is error D%k`udz< } &N^^[
uG ]EhU8bZ (w+dB8)X String sHeader; kCoTz"Z- N4z(2. "h >B`S for(int i=1;;i++) `VB]4i}u { =5PNH 2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); f-M 9OI //Utility.log(in.readLine()); WOgPhJ sHeader=httpConnection.getHeaderFieldKey(i); 7G^`'oZ if(sHeader!=null) c(tX761qz { xbeVqP if(sHeader.equals("Content-Length")) B"9 /+Yj { 5qx,b&^w nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K.{:H4_ break; {Al}a`da } pMfP3G7V } S9'8rn!_ else e?"XMY break; X=Th } 'I tsu~fza } 6,D)o/_ catch(IOException e){e.printStackTrace ();} `!t+sX-n catch(Exception e){e.printStackTrace ();} = @UgCu>= O_n) 2t(c? acXB
vs Utility.log(nFileLength); `QIYnokL w&F/P]1 H$j`75#u?- return nFileLength; ) C?emTih } @\_l%/z{ GdxMHnn= .^Z^L F //保存下载信息(文件指针位置) .gPXW=r private void write_nPos() XKTX~: { 0i4X,oHjG try{ ?'I[[KuG output = new DataOutputStream(new FileOutputStream(tmpFile)); i5QG_^X& output.writeInt(nStartPos.length); \vU1*:3 for(int i=0;i<nStartPos.length;i++) G31??L:< { _ zh>q4M // output.writeLong(nPos); .%iJin" output.writeLong(fileSplitterFetch.nStartPos); 4IW7^Pq`P output.writeLong(fileSplitterFetch.nEndPos); e!:/enQo } [^U#ic>cT output.close(); 3O W)% } (zm5
4
Vm catch(IOException e){e.printStackTrace ();} >*5+{~k~4 catch(Exception e){e.printStackTrace ();} RH+'"f } b.<>CG' ns{BU->f ) ag8]
//读取保存的下载信息(文件指针位置) pX nY= private void read_nPos() #DL( %=: { oZY2K3J) try{ 0^27grU> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Xg](V.B6 int nCount = input.readInt(); RnA>oKc nStartPos = new long[nCount]; j\ dY nEndPos = new long[nCount]; ,s?7EHtC for(int i=0;i<nStartPos.length;i++) LHt{y3l] { ]Gm$0uS nStartPos = input.readLong(); ~sI$xX! nEndPos = input.readLong(); ]lKQwpX3 } *TjolE~o input.close(); T2nbU6H } 7H1 ii catch(IOException e){e.printStackTrace ();} 5g{L
-8XwI catch(Exception e){e.printStackTrace ();} `3v!i } I^5T9}>Q RawK9K_1 ae)0Yu`*G7 private void processErrorCode(int nErrorCode) ; U)a)l'y { 1lxsj{>U System.err.println("Error Code : " + nErrorCode); tPT\uD#t } GQNs :oRJ' ^Ms)T3dM m]1=o7 //停止文件下载 S<hj6A public void siteStop() rb/m;8v> { ]m#.MZe bStop = true; 4)o_gm~6c4 for(int i=0;i<nStartPos.length;i++) :?Xd&u0){ fileSplitterFetch.splitterStop(); 5 W<\J x<0-'EF/S G%a8'3d, } kH!I&4d& } hLVS}HE2 //负责部分文件的抓取 iXN7+QO) **FileSplitterFetch.java [w%MECTe */ 8-N8v
*0 package NetFox; RaKfYLw Q9lw~" $II[b-X?S import java.io.*; /\%K7\ import java.net.*; Q]';1#J\ H$^b.5K Su<Ggv" public class FileSplitterFetch extends Thread { +TzF*Np |P_\l,f8` xZ51iD$ String sURL; //File URL [e2sUO0~r long nStartPos; //File Snippet Start Position ;CU<\ long nEndPos; //File Snippet End Position *0 ;DCUv int nThreadID; //Thread's ID -%&_LE9ZtS boolean bDownOver = false; //Downing is over -fl?G%:(!0 boolean bStop = false; //Stop identical FtUO gL)| FileAccessI fileAccessI = null; //File Access interface &S}i)Nu6J TzXivE@mm U&fOsx?" public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U/ncD F%C { cxTP4\T\E this.sURL = sURL; rz]0i@ehv' this.nStartPos = nStart; &^ sgR$m this.nEndPos = nEnd; 't$(Ruw nThreadID = id; IT,TSs/Y fileAccessI = new FileAccessI(sName,nStartPos);//定位 /t-m/&> } +$MNG `U4R%
qhWA Bi"7FF(z public void run() tylMJ$ 9*. { g)*[W>M while(nStartPos < nEndPos && !bStop) f-9&n4=H { `;7^@ k :X>%6Xj?RV ~q]+\qty4 try{ mPNT*pAO URL url = new URL(sURL); f>)k<-<yj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6V= 69} httpConnection.setRequestProperty("User-Agent","NetFox"); Q 'R@'W9 String sProperty = "bytes="+nStartPos+"-"; :t\pi.uWt httpConnection.setRequestProperty("RANGE",sProperty); K~A$>0c Utility.log(sProperty); "5mdq-h( c9\jELO zcGeXX}V? InputStream input = httpConnection.getInputStream(); )%q]?@kB //logResponseHead(httpConnection); n'D1s:W^B >9{Gdq[gyr 1FU(j*~: byte[] b = new byte[1024]; 0>Y3>vwSl int nRead; 7Op6>i
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) uBLI!N-G { nB ?$W4 nStartPos += fileAccessI.write(b,0,nRead); Z~^)B8 //if(nThreadID == 1) sQrP,:=r# // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D 8^wR{-;J } G>{Bij44 xU#f>@v! 7/lXy3B4 Utility.log("Thread " + nThreadID + " is over!"); T:aYv;#0 bDownOver = true; c&.>SR') //nPos = fileAccessI.write (b,0,nRead); V`Z-m-V~1 } *.wX9g9\ catch(Exception e){e.printStackTrace ();} K
&m`1f } umrfA } Bk&ry)`gD <Q'J=;vV S[rz=[7{ //打印回应的头信息 3z9}cOFq]z public void logResponseHead(HttpURLConnection con) )CQ'kHT<e { [psW+3{bG for(int i=1;;i++) bX%9'O [- { 7A|n*'[T> String header=con.getHeaderFieldKey(i); PSz|I8
c if(header!=null) fOEw]B#@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); T+7O+X# Utility.log(header+" : "+con.getHeaderField(header)); won;tO]\;@ else ~=~|@K break; Sw<@u+Z;% } ftB-gItV } gT$`a mGZ^K,)&OR /k3v\Jq{ public void splitterStop() M<oIo036 { ~G.'pyW bStop = true; ohqi4Y!j/~ } '`Eb].s* _NQMi4 V( E}K6Op;=v5 } aMQfg51W: t<5$85Y~ hnag<= /* LIYj__4=| **FileAccess.java r9<OB`)3+ *//文件访问(定位,写) !, Y1FC package NetFox; '{+5+ J import java.io.*; m[6?v;w Zq7Y('=`t@ vZ[wr@) public class FileAccessI implements Serializable{ t'Zq>y;yg U_ELeW5@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ygoA/*s RandomAccessFile oSavedFile; 4lMf'V7*l long nPos; ^]}+s( JGl0
(i*| D?ojxHe public FileAccessI() throws IOException ?7>G\0G { -\C;2&( this("",0); -?L~\WJAL } +?r,Nn #[$^M:X. v4c*6(m public FileAccessI(String sName,long nPos) throws IOException o9I=zAGjy { Yxik.S+G oSavedFile = new RandomAccessFile(sName,"rw"); 2wR?ON=Q this.nPos = nPos; vz'/]E oSavedFile.seek(nPos); LYY3*d } MYyV{W*T> \\w<.\Yh GH ]c public synchronized int write(byte[] b,int nStart,int nLen) [t#xX59 { 8NCu;s int n = -1; !R@v\Eu try{ ejs_ ? oSavedFile.write(b,nStart,nLen); %l{0z< n = nLen; =^a Ngq } (lPiv+'n catch(IOException e) ;ED` 7 { JmlMfMpXMs e.printStackTrace (); /j%(Z/RM } 9R$0[HbI3 hO8~Rg
haNi[| return n; 2>`m1q: } cg`bbZ h"O4r8G} >~_oSC)E } \N3A2L)l \PU7,*2 Q`= ,&;T> /* n:dnBwY **SiteInfoBean.java f%#q}vK- */ 'P'f`;'_DC package NetFox; 2Kg-ZDK8 p;nRxi7' EhWYFQ public class SiteInfoBean {
\\U,|}L . faTp|T`nY Tj(DdR#w private String sSiteURL; //Site's URL _z6_mmMp private String sFilePath; //Saved File's Path (AIgW private String sFileName; //Saved File's Name W"3YA+qpI private int nSplitter; //Count of Splited Downloading File u7>{#] k`aHG8S\ RX])#=Cs public SiteInfoBean() PvHX#wJ {//nSplitter的缺省值为5 I='6>+P //default value of nSplitter is 5 UO~Xzx!e this("","","",5); /9QC$Z):< } /&>vhpZ} X0FTD':f 8%\0v?a5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) p)&Yr { 1@}s: sSiteURL= sURL; *'l|ws sFilePath = sPath; f3;.+hJ]) sFileName = sName; bz'#YM this.nSplitter = nSpiltter; *@+E82D Z@1vJH6IbA PS:"mP7n } ",,W1]"% 6B8gMO &m5FYm\ public String getSSiteURL() ^}Wk { z79c30y]" return sSiteURL; j3t,Cx } _48@o^{ YP4lizs. hBRcI0R public void setSSiteURL(String value) fk5$z0 / { G4<M@ET sSiteURL = value; W ])Lc3X } l$:?82{ qmy3pnL 4Pv Pp{Y public String getSFilePath() gcI?)F { /:GeXDJw return sFilePath; jt?DogYx } bmP2nD6 0wE)1w<C~ O'.sK pXe public void setSFilePath(String value) qGkD] L { U32&"&";c sFilePath = value; wSPwa,)7s } <FofRFaS uXuA4o$t- 'UFPQ public String getSFileName() a<CJ#B2K { NK!#K>AO return sFileName; /6@$^paB } H"b}lf >c30kpGg ;!:@3c public void setSFileName(String value) q]\GBRp { [}Z!hq sFileName = value; \Y$@$) } D:=Q)Uh0I ^&!iq K2o /cC4K\M public int getNSplitter() H[J5A2b { qA>C<NL return nSplitter; ?'/#Gt` } M{)|9F Dd'4W 'z$!9ufY, public void setNSplitter(int nCount) LUKt!I0l { L43]0k nSplitter = nCount; q]rqFP0C } e13' dCG } 78h!D[6 %pUA$oUt z/P^Bx]r /* @3_."-d **Utility.java ;y]BXW&l& */ =2OLyZDI package NetFox; )u>/: Lg2z `uv $*qQ/hi public class Utility { <!a%GI DTN)#GCtF f\X7h6k8{ public Utility() ]&_z@Z.i { e3=-7FU 20`QA
u)' Lgrpy } a_(fqoW ^X|Bzz) //线程睡眠 @$R^-_m public static void sleep(int nSecond) \rSofn#c { p"|0PlW try{ ?F^O7\rw Thread.sleep(nSecond); $0,lE+7* } ~vV+)KI catch(Exception e) /7&WFCc)( { "VgPaz# e.printStackTrace (); 1qE*M7_:E> } \:Z8"~G } owe6ge7m
V*%Lc9<d //日志 4YyVh.x public static void log(String sMsg) W0\
n?$ZC~ { I!u fw\[ System.err.println(sMsg); bF c
% } ve*m\DU WVdF/H @XN*H- | public static void log(int sMsg) (dHil#l {
4Ixu% System.err.println(sMsg); h:Hpz } 4=C7V,a } !~-@p?kW/ 4%>2>5 v
O@7o /* 1JY3c
M **TestMethod.java Z ItS(oJ. */ -m_H]<lWZ package NetFox; j%Wip j;c I9hZ&ed16 zc&i 4K public class TestMethod { u$
a7 ';KZ.D !Nx'4N`&l public TestMethod() I`S?2i2H { ///xx/weblogic60b2_win.exe sG:tyvln try{ *ulkqpO SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >{.|Ng4K //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Fh~
pB>t SiteFileFetch fileFetch = new SiteFileFetch(bean); L%31>)8 fileFetch.start(); 6rh^?B } H57wzG{xG catch(Exception e){e.printStackTrace ();} `8b4P>';O' n|) JhXQ p#>d1R1& } MxLi'R= s/0~!0 &e;GoJ public static void main(String[] args) 8=WX`*-uH { UsnIx54D3 new TestMethod(); de,4Ms!% } fea4Ul{ib } M:R|hR{=* 点击下载更多相关资料
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