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/* MZ0 J/@( **SiteFileFetch.java #jQITS7 */ lyP<&<Y5 package NetFox; ~MOIrF import java.io.*; -0Ps.B import java.net.*; '2eggX% [l0>pHl@ OmsNo0OA public class SiteFileFetch extends Thread { FbF P (f7R~le &T{+B:*v SiteInfoBean siteInfoBean = null; //文件信息Bean \j4TDCs_[ long[] nStartPos; //开始位置 e7-U0rrE long[] nEndPos; //结束位置 OF}vY0oiw? FileSplitterFetch[] fileSplitterFetch; //子线程对象 z&w@67
>j long nFileLength; //文件长度 %k9GoX_ boolean bFirst = true; //是否第一次取文件 y:m Xv<g boolean bStop = false; //停止标志 V
V<Zl File tmpFile; //文件下载的临时信息 Z\n
nVM= DataOutputStream output; //输出到文件的输出流 bO9X;}\6 |(]XZ !{ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Wh,p$|vL public SiteFileFetch(SiteInfoBean bean) throws IOException `rvS(p[s { {q:6;yzxl siteInfoBean = bean; uZCPxog //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L+&$/1h] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ?e0ljx; if(tmpFile.exists ()) F&^u1RYz { alyWp bFirst = false; ol-U%J read_nPos(); +ps(9O/B> } 1jDN=hIl else /@:I\&{f'9 { [&51m^ nStartPos = new long[bean.getNSplitter()]; `j9 ;9^ nEndPos = new long[bean.getNSplitter()]; A2..gs/ } Yf1?3(0O >o.4sN@ T< D&%) ta%yQd7 } G@s
rQum( `#R[x7bA1 09/Mg public void run() `KB; 3L { 6YNd;,it>p //获得文件长度 L\aG.\ //分割文件 voiWf?X //实例FileSplitterFetch 5y0N }} //启动FileSplitterFetch线程 wZ0RI{)s' //等待子线程返回 UZz/v#y~ try{ `fS$@{YI_ if(bFirst) zt6GJz1q { Kqm2TMO]>V nFileLength = getFileSize(); m9 1Gc?c if(nFileLength == -1) @kd`9Yw { G8}k9?26( System.err.println("File Length is not known!"); jBb:) } 1N,</<" else if(nFileLength == -2) qx|~H'UuBN { G0)}?5L1J System.err.println("File is not access!"); 4}`z^P<C } EV/DJ$C } else )\Am:?RH; { DZ"'GQSg for(int i=0;i<nStartPos.length;i++) 7v't# = { fS?}(7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); \ ,D>zF } evjj~xkte for(int i=0;i<nEndPos.length-1;i++) sFt"2TVr3 { l|v`B6( nEndPos = nStartPos[i+1]; Ir#]p9:x } [>![ViX nEndPos[nEndPos.length-1] = nFileLength; pLSh
+*F } FJCs$0 } 7H.3.j(L H\RejGR Ym% XCl //启动子线程 _0}u0fk fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Ogv9_X8 for(int i=0;i<nStartPos.length;i++) >e>%AMzo[ { {>g{+Eq fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ia@ |+r siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $O3.ex V nStartPos,nEndPos,i); gWQ(B Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q<0X80w> fileSplitterFetch.start(); >
9.%hSy } C cPOK2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9:R3+,ZN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b+1!qNuCW# // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1%ENgb:8 nEndPos = " + nFileLength); (@m/j2z // fileSplitterFetch[nPos.length-1].start(); H-\Ym}BGu -^+fZBU; ^hNl6)hR //等待子线程结束 9HB+4q[ //int count = 0; xpX<iT>5u //是否结束while循环 u8.F_'` z boolean breakWhile = false; _AzI\8m .do8\ (\ge7sE-oo while(!bStop) t0,=U8]w { tq}MzKI* write_nPos(); ClG\Kpirh Utility.sleep(500); E5!vw@, breakWhile = true; A3)"+`&PUl zZ6m`]{B9? 4_kY^"*#" for(int i=0;i<nStartPos.length;i++) d~ +(g! { EHN(K- if(!fileSplitterFetch.bDownOver) OClG dFJ| { oqAO@<dL! breakWhile = false; 0<7sM#sI! break; auga`* } _3(rwD } !wN2BCSY@ if(breakWhile) \3OEC` break; Ge_fU'F Q3Pu<j}Y URceq2_ //count++; "AU.Eh"-1 //if(count>4) nNq<x^@83 // siteStop(); l`.z^+!8@ } KLvAe>#, p[w! SR%= )$RV) System.err.println("文件下载结束!"); "4\k1H"_ } ^D<CoxG catch(Exception e){e.printStackTrace ();} L&c
&
<+0T } :.4O
Hp1 KCO.8=y3 D(l,Z //获得文件长度 6@TU9AZS` public long getFileSize() A|GtF3:G { 8tQ;N' int nFileLength = -1; XwUa|"X6 try{ ?r KbL^2 URL url = new URL(siteInfoBean.getSSiteURL()); 10fxK HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d7Vp^^}( httpConnection.setRequestProperty("User-Agent","NetFox"); R\|,GZ!`+ 1~t.2eU G vhPlH0 int responseCode=httpConnection.getResponseCode();
yUj`vu2 if(responseCode>=400) o3V\ { <Y."()}GeH processErrorCode(responseCode); o2X95NiH return -2; //-2 represent access is error :`e#I/, } ?h6|N%U' vof8bQ{& U|]cB String sHeader; S=ZZ[E_~S hH 5}%/vF TKM^ for(int i=1;;i++) 4^uSW&`;/ { E{EO9EI //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )w0x{_ //Utility.log(in.readLine()); +!0K]$VZs sHeader=httpConnection.getHeaderFieldKey(i); @QV0l]H0+ if(sHeader!=null) *#'j0;2F { tBbOxM m0 if(sHeader.equals("Content-Length")) a;t}'GQGk { ss[`*89 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wn.~Dx break;
][wb4$2 } ]R_R`X? } n9xP8<w8
else Iz1x| EQ break; [a04(
2g } `p&[b]b } tGgxI D catch(IOException e){e.printStackTrace ();} <Cv(@A-> catch(Exception e){e.printStackTrace ();} [K&%l]P7 UxL*I[z5 HwHF8#D*l Utility.log(nFileLength); O;~e^ <* }3^m>i*8 -T,?'J0 2 return nFileLength; lFGuQLuqA{ } &1$d`>fn r|EN 5 R3~,&ab //保存下载信息(文件指针位置) ^K;k4oK private void write_nPos() EY )2, { ZU73UL try{ g%&E~V/g$ output = new DataOutputStream(new FileOutputStream(tmpFile)); >E>yA d output.writeInt(nStartPos.length); mY.v: for(int i=0;i<nStartPos.length;i++) 1Z)Et, { 8cG?p // output.writeLong(nPos); @j^R+F output.writeLong(fileSplitterFetch.nStartPos); Z1eT>6|]r output.writeLong(fileSplitterFetch.nEndPos); rZKfb}ANQ } wAKHD*M) output.close(); m<h%BDSzr{ } /?eVWCR catch(IOException e){e.printStackTrace ();} iM@$uD$_Q2 catch(Exception e){e.printStackTrace ();} q#tUDxf(| } 5p (zhfuG '{"Rjv7 C`hdj/!A //读取保存的下载信息(文件指针位置) eR$@Q private void read_nPos() LH5Z@*0# { }T@=I&g; try{ ~Q&J\'GQH DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); HU'Mi8xxy int nCount = input.readInt(); M76p=* nStartPos = new long[nCount]; 5EFt0?G nEndPos = new long[nCount]; inWLIXC,
for(int i=0;i<nStartPos.length;i++) ,X.[37 { z:>cQUYl nStartPos = input.readLong(); 2aj1IBnz6/ nEndPos = input.readLong(); 8:$h&aBI } t(u2%R4<d input.close(); =]%JTGdp( } vN Bg&m catch(IOException e){e.printStackTrace ();} |NuMDVd+s catch(Exception e){e.printStackTrace ();} CRK%^3g } <rBW6o7 XOvJlaY)'. 'XK 'T\m private void processErrorCode(int nErrorCode) g&s.
0+ { PMfW;%I. System.err.println("Error Code : " + nErrorCode); 4yyw:" } ib=)N)l lL}NiN-)t 'X;cgAq8( //停止文件下载 (`1io public void siteStop() G-d7}Uz? { hzo> :U bStop = true; "'U^8NA2 for(int i=0;i<nStartPos.length;i++) 4>d4g\Z0L fileSplitterFetch.splitterStop(); >Zb!?ntN`t aV\i3\da Vu3DP+u|i } '^UHY[mX8 } Zw]"p63eMa //负责部分文件的抓取 <tD,Uu{P **FileSplitterFetch.java fz(YP=@ZnP */ #EH=tJgO|J package NetFox; BU:;;iV8 C?\(?%B \O5L#dc# import java.io.*; 9{u= import java.net.*; #AJW-+1g.= =I# pXL YnEyL2SuU public class FileSplitterFetch extends Thread { ;z'&$#pA 8ymdg\I+L BJjic% V String sURL; //File URL TTXF
r long nStartPos; //File Snippet Start Position $
VT) long nEndPos; //File Snippet End Position .C'\U[A{ int nThreadID; //Thread's ID L/i'6(=" boolean bDownOver = false; //Downing is over z@,pT"rb boolean bStop = false; //Stop identical 1}d
F,e FileAccessI fileAccessI = null; //File Access interface
7kLurv )ros-dp` Nx 42k|8
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g88k@<Y { jZA1fV this.sURL = sURL; p*Z<DEh# this.nStartPos = nStart; ,X|Oe@/ this.nEndPos = nEnd; if*V-$[I nThreadID = id; G"/;Cq=t fileAccessI = new FileAccessI(sName,nStartPos);//定位 2P"643tz } LKM018H> JWNN5#=fQ WZ'<iI public void run() >V"{]v { E=I'$*C\D while(nStartPos < nEndPos && !bStop) ]3 "0#Y { w){B$X xrf|c LeCc`x,5 try{ rS [4Pey URL url = new URL(sURL); Y/sav; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'gY?=,dF> httpConnection.setRequestProperty("User-Agent","NetFox"); SY,ns*>1F String sProperty = "bytes="+nStartPos+"-"; RdX+:!lD httpConnection.setRequestProperty("RANGE",sProperty); tK3$,9+ Utility.log(sProperty); MSCH6R"5 \l/(L5gY jwI2T$ InputStream input = httpConnection.getInputStream(); Q`k;E}x_- //logResponseHead(httpConnection); &{Z+p(3Gj aT,WXW* 2XR!2_)O5 byte[] b = new byte[1024]; 7J);{ &x9h int nRead; bW`nLiw}% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -HF?1c { k6#$Nb606 nStartPos += fileAccessI.write(b,0,nRead); v?He]e' //if(nThreadID == 1) jkk%zu // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _
s 3aaOL } O ~5t[ 1K/HVj+'. ?8O5%IrJ Utility.log("Thread " + nThreadID + " is over!");
#w; "s* bDownOver = true; n*[ZS[I //nPos = fileAccessI.write (b,0,nRead); 3eUi9_s+ } 02,t catch(Exception e){e.printStackTrace ();} ~>@~U] } -8)Hulo/{U } &b (* /`M# e#oK%
{A //打印回应的头信息 ]WMzWt:L public void logResponseHead(HttpURLConnection con) "mn?* { ,1I-%6L for(int i=1;;i++) {iyJHY { LVUA"'6V String header=con.getHeaderFieldKey(i); `+Nv=vk if(header!=null) vd%AV(]<LJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); "nz\YQdg Utility.log(header+" : "+con.getHeaderField(header)); 8=D,`wog else F > rr. break; ~7b#BXzP } oaj.5hM } X+Sqw5rH (VO'Kd Z(q]rX5" public void splitterStop() |Ua);B ~F { _)j\
b bStop = true; JL
{H3r&/S } :i{M1z I "EpH02{i ,x\qYz+7| } 4V9BmVS|Th Lx_Jw\YO oLkzLJ /* g{Av
=66Z **FileAccess.java ASdW!4.p *//文件访问(定位,写) =R:O`qdC4e package NetFox; %f CkR`: import java.io.*; !n;3jAl&$ <<-L,0 Z,p@toj' public class FileAccessI implements Serializable{ d%I7OBBx@ /,SVG1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 qUfoEpW2=6 RandomAccessFile oSavedFile; GLIY!BU<C long nPos; )&E]
3*Q=)} -"zW"v)\ public FileAccessI() throws IOException ;'Hu75ymo { r\QV%09R this("",0); aEzf*a|fSV } or#]
![7N l[~$9C'ji @|cHDltH public FileAccessI(String sName,long nPos) throws IOException E-1u_7 { Z;N3mD+\ye oSavedFile = new RandomAccessFile(sName,"rw"); *04}84?: this.nPos = nPos; ekY)?$v3 oSavedFile.seek(nPos); 6*B%3\z) } GPni%P#a@0 5`3x(=b r?u4[
Oe# public synchronized int write(byte[] b,int nStart,int nLen) }8AH/ { kxJs4BY0 int n = -1; 0e&&k try{ 5=*i!c
_m oSavedFile.write(b,nStart,nLen); <#8}![3Q n = nLen; <}RD]Sc$1 } HY_>sD catch(IOException e) CF3x\6.q} { \A^8KVE! e.printStackTrace (); (Zx--2lc } q~#>MB}". q{V e%8$" /t`|3Mw return n; e<uf)K=(C } 0,-]O= Pm#/j; )a0l:jEOc } ;HAvor=? Q\zaa9P Ae=JG8Ht~ /* hlreeXv **SiteInfoBean.java )n"0:"Ou */ 2u-J+ package NetFox; u`wD6&y* QDj%m %Xd c|3oa"6T> public class SiteInfoBean { )-"<19eu ]35`N<Ac MA_YMxP.' private String sSiteURL; //Site's URL M._E$y,5 private String sFilePath; //Saved File's Path [(a3ljbRX private String sFileName; //Saved File's Name ..h@QQ private int nSplitter; //Count of Splited Downloading File q.R(>ZcV 4pMp@b =RXeN+
&R public SiteInfoBean() 6|'7Mr~\ {//nSplitter的缺省值为5 ;o)'dK //default value of nSplitter is 5 s]e`q4ip this("","","",5); 8pf]M& } Jw=7eay$F &x B^ g?|Z/eVJ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) R|}4H*N { SVZ@'X\[M sSiteURL= sURL; :~R a} sFilePath = sPath; Y,L[0% sFileName = sName; X]9<1[f this.nSplitter = nSpiltter; lH?jqp q {}5wM [(g2u@ } 2.</n}g zOA~<fhT J~J+CGT~2 public String getSSiteURL() g||EjCsp { !"<rlB,J return sSiteURL; \:@7)(p\; } LN(\B:wAY ^w%%$9=:r b3_P??yp public void setSSiteURL(String value) 3n)Kzexh { 8mmnnf{P sSiteURL = value; Z" H; t\P } *tT}N@<% PA803R74 .7
)oWd! public String getSFilePath() SIm1fC { qZE3T:S return sFilePath; A@_>9; } ~9APc{"A jP/Vqe%%8 ;=IJHk1& public void setSFilePath(String value) <sm"3qs"_ { vO$cF* sFilePath = value; ` ;mQ"lO } ceJ#>Rj :sK4mR F l]D$QT3 public String getSFileName() 'bLP#TAzf { j&/+/s9N return sFileName; {hOS0).(w7 } (Nz`w "CC"J(&a 8pA<1H% public void setSFileName(String value) [*It' J^ { 55ec23m sFileName = value; N;YFr } fsK=]~<g 6Q>:vQ+E oV['%Z' public int getNSplitter() tA4Ra,-c { Oq% TW|a# return nSplitter; :4 z\Q] } 3QZm
*.
/" UkD\ma [O ^/"Qk public void setNSplitter(int nCount) d])ctxB { /N%i6t<xU nSplitter = nCount; li?@BHEf } +\%]<YO }
ox<&T| Iv3yDL; /kyO,g$9 /* H;_Ce'oU( **Utility.java Jb$G */ 12L`Gi package NetFox; qHgtd+
I ?mC'ZYQI kmTYRl
)j public class Utility { i)(G0/: V.$tq ?5ZvvAi public Utility() &0[L2x}7 { uUx7>algF >G"fMOOkW 5tkKd4VfL } h]~FYY aqqo>O3 s //线程睡眠
%X\A|V& public static void sleep(int nSecond) Hicd
-' { F-o?tU try{ k kD#Bb Thread.sleep(nSecond); f^QC4hf0 } x.t&NP^V) catch(Exception e) P}a$#a'! { am3JzH e.printStackTrace (); #E=8kbD7 } i"
u|119 } =AzkE] 05HCr"k //日志 GK,{$SC+= public static void log(String sMsg) t 3N}): { t@#5
G*
_Q System.err.println(sMsg); (i(E~^O } EI?8/c vvY?8/ 5CcX'*P public static void log(int sMsg) ` W);+s { OMmfTlM% System.err.println(sMsg); ; \co{_&D } ?-Of\fNu } 6rmx{Bt z<!A;.iD r6Vw!^]8u8 /* $ eL-fg **TestMethod.java 1TA!9cz0Z */ G8w @C package NetFox; q Sv!5&u g%]<sRl:- PCgr`($U public class TestMethod { h"8[1
; l}-k>fug ziO(`"v public TestMethod() fX,O9d$ { ///xx/weblogic60b2_win.exe WW3Jxd try{ 8/)q$zs SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %YF
/=l //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); {_.(,Z{ SiteFileFetch fileFetch = new SiteFileFetch(bean); mMZrBz7r fileFetch.start(); X#0yOSR } 5M'cOJ catch(Exception e){e.printStackTrace ();} [bo"!Qk% iKu3'jZ/O tFn[U#' } =Oh$pZRymu nXfz@q Si~wig2 public static void main(String[] args) ljrJC { 6=JJ!`"<2 new TestMethod(); Cpd>xXZz&S } u:(=gj,~x } +ru `Zw5, 点击下载更多相关资料
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