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/* #ZIV>(Q\H **SiteFileFetch.java j=)%~@ */ kRgyvA,*; package NetFox; {sy#&m(el import java.io.*; g
S;p:: import java.net.*; u pf7:gk + {MKq
Yl{ *g5df[ public class SiteFileFetch extends Thread {
^sq3@*hCw Y#c11q Z E~zLhJTUL' SiteInfoBean siteInfoBean = null; //文件信息Bean IPcAE!h6zN long[] nStartPos; //开始位置 k6~k long[] nEndPos; //结束位置 @ -JD`2z FileSplitterFetch[] fileSplitterFetch; //子线程对象 q<}5KY long nFileLength; //文件长度
^Y xqJy boolean bFirst = true; //是否第一次取文件 ?Z]}G boolean bStop = false; //停止标志 \1RQ),5 %] File tmpFile; //文件下载的临时信息 cW),Y|8 DataOutputStream output; //输出到文件的输出流 !+ IxPn U<eVLfSij //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y[;Pl$ public SiteFileFetch(SiteInfoBean bean) throws IOException )%C482GO- { pM\)f siteInfoBean = bean; B4&@PX"'>, //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); r{kV*^\E tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); tqrvcnQr^ if(tmpFile.exists ()) T}P|uP { /'G'GQrr bFirst = false; N7Z&_$Bx read_nPos(); [*?P2.b f } #l-,2C~ else ']f]:X;6w { T~%5^+[h nStartPos = new long[bean.getNSplitter()]; 7F3Hkvd[k nEndPos = new long[bean.getNSplitter()]; ]k{cPK } ZzI^*Nyg M!=v"C# quf,ZK5 2Z,;#t } ekP=/;T#S ~MO'%'@ 9XS+W
w7 public void run() "
%|CD"@ { 8ne'x!1 D //获得文件长度 _Ux>BJmP //分割文件 AUoi$DF(@ //实例FileSplitterFetch M.d{:&@`% //启动FileSplitterFetch线程 622mNY //等待子线程返回 ms
;RJT2O' try{ 3Du&KZ if(bFirst) u!nt0hS { "SyyOD
)WA nFileLength = getFileSize(); nH% / if(nFileLength == -1) y~1UU3k5 { Ft`#]=IS System.err.println("File Length is not known!"); pWps-e } e7/J:n$ else if(nFileLength == -2) GG;M/}E9 { .6$ST Ksr System.err.println("File is not access!"); 9A3Q&@, } &)fPz-s else X~G"TT$) { x`%;Q@G for(int i=0;i<nStartPos.length;i++) tq@<8? { DfV_08 nStartPos = (long)(i*(nFileLength/nStartPos.length)); wGISb\rr } ffm19 B= for(int i=0;i<nEndPos.length-1;i++) 3=dGz^Zdv: { RPaB4> nEndPos = nStartPos[i+1]; m^T$H_*; } 6Om-[^ nEndPos[nEndPos.length-1] = nFileLength; Ko''G5+ } FPFt3XL } 9z_Gf]J~ i>,5b1x~ RLulz|jC //启动子线程 A1%V<im@Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; kf-ZE$S4 for(int i=0;i<nStartPos.length;i++) N4fuV?E` { ENJ] fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wqE ]o=
k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), P).
@o.xl nStartPos,nEndPos,i); )CdglPK Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O:lD>A4{ fileSplitterFetch.start(); f
21w`Uk48 } 1 ,D2][ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [(ty{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Di-"y, [ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8CA4gnh nEndPos = " + nFileLength); #wM0p:< // fileSplitterFetch[nPos.length-1].start(); .D4D!! $!obpZ~ } v
l{hE~ //等待子线程结束 o{UwUMw5` //int count = 0; 3O#7OL68v //是否结束while循环 4sZ^:h,1 boolean breakWhile = false; >454Yir0Mk T| 4c\ L?9Vz&8] while(!bStop) <hy>NM@$ { zG&
N5t96X write_nPos(); 8%`Sx[ Utility.sleep(500); sSD(mO<( breakWhile = true; IUc!nxF# 3\mFK$#sr gs'bv#4yd for(int i=0;i<nStartPos.length;i++) @4$F%[g
h { G =< KAJ if(!fileSplitterFetch.bDownOver) SC|cCK hqi { M9f*7{c breakWhile = false; u%}vTCg*p break; )[nzmL*w } t'9E~_!C } IyP\7WZ if(breakWhile) Ujj2A^ break; tanuP@O T_Y 6AII 9sE>K) //count++; 7*`ldao~ //if(count>4) O=mGL // siteStop(); I}k!i+Yl } B[$KnQM9Y o~iL aN\+ })!n1kt System.err.println("文件下载结束!"); ARU,Wtj# } e2B~j3-?z catch(Exception e){e.printStackTrace ();} j./bVmd. } >Q+EqT
|qbJ]v! k+i}U9c" //获得文件长度 NqF-[G< public long getFileSize() mup3ua]! { h{PLyWH int nFileLength = -1; 4El{2cfA try{ x!YfZ* URL url = new URL(siteInfoBean.getSSiteURL()); **s:H'M w_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^?J:eB! httpConnection.setRequestProperty("User-Agent","NetFox"); 1km=9[;w' %0u7pk h/_z QR- int responseCode=httpConnection.getResponseCode(); !J2Lp if(responseCode>=400) slQKkx \Dn { Kw?,A
processErrorCode(responseCode); W%h<@@c4, return -2; //-2 represent access is error E-"Jgq\aC } MESQAsx% }W|CIgF* w[|!$J? String sHeader; 1m![;Pg3 'GW@P #x%O0 for(int i=1;;i++) {UPIdQ'g { 5 !NPqka}. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ^NnZYr. //Utility.log(in.readLine()); KR522YW sHeader=httpConnection.getHeaderFieldKey(i); uNRGbDMA= if(sHeader!=null) 3(PU= { qmL!"ZRLF if(sHeader.equals("Content-Length")) ^ul `b { 5SKu \H\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S3oU7*OZ break; 2qn~A0r } _`D_0v(X } KM\`,1?x92 else f%|g7[ break; ~;`i&s } BM3)`40[] } Jhut>8 catch(IOException e){e.printStackTrace ();} XM=`(e
o catch(Exception e){e.printStackTrace ();} nwkhGQ P4N{lQ.> !.w S+ Utility.log(nFileLength); 6U""TR! qBwqxxTc \+>b W( return nFileLength; T[;{AXLeI } $==hr^H hi
]+D= S MBwp{ET!p //保存下载信息(文件指针位置) };KmMpBn private void write_nPos() S%T1na^x { 4a646jg) try{ [%h^qJ output = new DataOutputStream(new FileOutputStream(tmpFile)); }5S2v+zE output.writeInt(nStartPos.length); 4Fz^[L}[ for(int i=0;i<nStartPos.length;i++) )O+9v}2 { 5GRN1Aov< // output.writeLong(nPos); nC*/?y*9 output.writeLong(fileSplitterFetch.nStartPos); Ugs<WVp$ output.writeLong(fileSplitterFetch.nEndPos); @'U4-x } TZ*ib~ output.close();
P.fgt>v] } f~U|flL^ catch(IOException e){e.printStackTrace ();} ~O|0.)71] catch(Exception e){e.printStackTrace ();} gT+/CVj R } +_ G'FD U
*I52$ N4}h_mh^' //读取保存的下载信息(文件指针位置) woR)E0'qx private void read_nPos() 4%]{46YnK { jBB<{VV| try{ ~_oTEXT^O DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }Jtaq[y\r int nCount = input.readInt(); `}=Fw0 nStartPos = new long[nCount]; U$J]^-AS nEndPos = new long[nCount]; |zUDu\MZ{ for(int i=0;i<nStartPos.length;i++) xFvSQ`sp { |Y99s)2&N nStartPos = input.readLong(); v
EX <9 nEndPos = input.readLong(); VEpQT
Qp } 6D+k[oHZm input.close(); # K-Q/* } r94BEC 2 catch(IOException e){e.printStackTrace ();} /2U.,vw catch(Exception e){e.printStackTrace ();} !eO?75/ }
m$cM+ }@#eD dy0!Zz private void processErrorCode(int nErrorCode) >/n/n{{ { w5|"cD#8A System.err.println("Error Code : " + nErrorCode); vTP_vsdeG } )a6i8b3 |On6?5((e mPh; //停止文件下载 kjmF-\ public void siteStop() m|y]j4 { *X>rvAd3 bStop = true; [v&_MQ for(int i=0;i<nStartPos.length;i++) *%8us~w5/ fileSplitterFetch.splitterStop(); iVl"H@m/ K~E]Fkw!; !XicX9n } !hc7i=V? } - Z|1@s& //负责部分文件的抓取 f Xq e7[ **FileSplitterFetch.java 4 I~,B[| */ LRI_s>7 package NetFox; ywdNwNJ Y#m0/1- KOxD%bX_ import java.io.*; OGVhb>LO1 import java.net.*; T]myhNk o4J K$% -OHG1"/ public class FileSplitterFetch extends Thread { /U`"|3 ?|L)!LYx .xD-eWw3R String sURL; //File URL ;F:(5GBi long nStartPos; //File Snippet Start Position y>o#Hq&qM long nEndPos; //File Snippet End Position *oPSkEA{ int nThreadID; //Thread's ID eu4x{NmQ boolean bDownOver = false; //Downing is over hN} X11 boolean bStop = false; //Stop identical vrbS-Z<S9 FileAccessI fileAccessI = null; //File Access interface wx1uduT) emaNmpg F0yh7MItV public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9}\T?6?8pX { 6lhVwgy3A this.sURL = sURL; [DE8s[i- this.nStartPos = nStart; +:t1P V;l this.nEndPos = nEnd; hb_Ia]b nThreadID = id; RWoiV10 fileAccessI = new FileAccessI(sName,nStartPos);//定位 x O)nS _I } 7}#vANm Jk~T.p?tF "pH+YqJ$ public void run() eMF%!qUr { `b2I)xC# while(nStartPos < nEndPos && !bStop) ALG
#)$| { (I+-wki"e x|Ei_hI- v|"{x&I. try{ =:2V4H(F URL url = new URL(sURL); 3)xV-Y9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -{w&ya4X httpConnection.setRequestProperty("User-Agent","NetFox"); k-89( String sProperty = "bytes="+nStartPos+"-"; Uarb
[4OZ httpConnection.setRequestProperty("RANGE",sProperty); WFB2 Ub7 Utility.log(sProperty); *0iP*j/] qV}zV\Nz _3E7|drIX InputStream input = httpConnection.getInputStream(); $""[(
d?0 //logResponseHead(httpConnection); 7!%cKZCY YF"D;. *<UQ/)\ byte[] b = new byte[1024]; A ssf
f; int nRead; |hpm|eZG"h while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) NBeGmC|
{ o1Xk\R{ nStartPos += fileAccessI.write(b,0,nRead); m$o|s1t //if(nThreadID == 1) hsl8@=_ B // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _
9k^Hd[L$ } W$3p,VTMmB ?T^$,1- 6^zv:C% Utility.log("Thread " + nThreadID + " is over!"); LJiMtqg bDownOver = true; )O}x&@Q //nPos = fileAccessI.write (b,0,nRead); Gzs x0%`) } '`RCNk5l catch(Exception e){e.printStackTrace ();} E`X+fJx } EfyF]cYL } dRu@5
:BP NLdUe32A >S~ #E,Tg //打印回应的头信息 "#9WF} public void logResponseHead(HttpURLConnection con) WOwIJrP { lf Giw^ for(int i=1;;i++) 3!d|K%J { uM\~*@ String header=con.getHeaderFieldKey(i); x=H*"L= if(header!=null) c)lK{DC //responseHeaders.put(header,httpConnection.getHeaderField(header)); p#?1l/f"
Utility.log(header+" : "+con.getHeaderField(header)); Zj},VB*T else X{ Nif G break; 7' 6m;b~F } D~1nh%x_ } MLR3A
s sFGXW [A3hrSw public void splitterStop() $<yb~z7J { auO^v;s bStop = true; G,XFS8{% } 1
t#Tp$ @^P=jXi< Z^h4%o-l{ } $zdJ\UX J>+Dv?Ni$ gy>2=d /* BBp
Hp **FileAccess.java dJ|]W|q< *//文件访问(定位,写) wRuJein# package NetFox; vI+PL(T@ import java.io.*; 0nl)0|?Az #v`G4d 8en85
pp8P public class FileAccessI implements Serializable{ b'ew
Od= xF ,J[Aj //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 C ]#R7G RandomAccessFile oSavedFile; nmgW>U0jZh long nPos; YZoH{p9f FV^kOz
e%qMrR public FileAccessI() throws IOException doe[f_\ { bg$e80 this("",0); ^&,{ } XjX<?W E`'+1 ucMl>G'!gX public FileAccessI(String sName,long nPos) throws IOException uxR_(~8 { e0hT oSavedFile = new RandomAccessFile(sName,"rw"); mG2}JWA
this.nPos = nPos; +)V6"XY-( oSavedFile.seek(nPos); 3w0m:~KS6V } G q:7d]c~T )`U T#5 pZWp2hj{X public synchronized int write(byte[] b,int nStart,int nLen) (C. 1'<] { #cApk int n = -1; *{tJ3<t(1 try{ K|s+5>]W/[ oSavedFile.write(b,nStart,nLen); lxxK6;r~> n = nLen; 'Oq}BVR& } )JZfC&, catch(IOException e) #S1)n[ { fCTjTlh e.printStackTrace (); D}_\oE/n } bhg"<I ?49wq4L;a O'p7^"M return n; +C+3DwN } "#p)Z{v"! N/y.=] 5v?6J#]2 } d$>1 2>> "r|O / D9Q%*DLd$_ /*
r_o2d 8 **SiteInfoBean.java {^N=hI */ GHoPv-# package NetFox; lk+)-J-lj' ?C4a,% 9aXm} public class SiteInfoBean { , X|oCD 3"<{YEj8U O[8Lp? private String sSiteURL; //Site's URL LtNG<n)_BH private String sFilePath; //Saved File's Path ^91k@MC private String sFileName; //Saved File's Name L6',s4 private int nSplitter; //Count of Splited Downloading File 1*=[%
d7 Q}1PPi, ]zD/W%c public SiteInfoBean() <;acWT?( {//nSplitter的缺省值为5 2Gx&ECa, //default value of nSplitter is 5 WLizgVM this("","","",5); 4S9AXE6 } `
a@NYi6 6v.*%E*P {9)LHX7dN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) B\4SB { @jjp\ ~ sSiteURL= sURL; wCkkfTO sFilePath = sPath; &yYK%~}t[ sFileName = sName; id*UTY
Tg this.nSplitter = nSpiltter; )+ S" ` ^D6 JckW LtCkDnXk } IoA"e@~t ) I@gy AU)Qk$c public String getSSiteURL() ! 5[?n3 { E|Z Y2&J`4 return sSiteURL; eyy&JjVs } gBrIqM i5 ZL-@2ZU{1 dp+wwNe public void setSSiteURL(String value) (z"Cwa@e { >yT:eG sSiteURL = value; .'SM|r$ } {U&Mo97rzX S6Kaw N>@AsI public String getSFilePath() F-2HE><+ { Oa*/jZjr return sFilePath; KaO8rwzDN } zQ7SiRt7* _a c_8m Fnr*.k public void setSFilePath(String value) Inr ~9hz { v6iV#yz3( sFilePath = value; D<nTo&m_ } >j\zj] -" ah~7T~ )LnHm public String getSFileName() 0Wk}d(f { d~YDg{H return sFileName; Kf(% aDYq } )M}bc1 _ `
R^[s56wp |QXW$ public void setSFileName(String value) B< 6*Ktc { KJSN)yn\ sFileName = value; As78yfK } pcL02W|J G!%1<SLi. I'J=I{p* public int getNSplitter() 9;q@;)'5 { u\>Ed9^ return nSplitter; wGw}a[a } 011 _(v oXfLNe6>L t t#M4n@ public void setNSplitter(int nCount) g_.BJ>Uv { hC~lH eH nSplitter = nCount; {Uu7 @1@n } tpA7"JD } u5%.T0
P Jw9|I)H 1jQz%^~ /* X%39cXM C **Utility.java Hn:%(Rg=aW */ ]xV7)/b5G package NetFox; ,7tN&R_ RYmk6w!w 1G$kO90 public class Utility { B*,9{ g0m/ /ptIxe i7*4hYY public Utility() ^D/*Hp _ { 5GC{)#4 YAd.i@^
aS:17+! } 82>zu} ~pwp B2c //线程睡眠 yS lN|8d public static void sleep(int nSecond) 8(&C0_yD { b\H~Ot[i try{ Zj!S('hSY Thread.sleep(nSecond); &eyFApM[Z } K*p^Gs, catch(Exception e) [+>$'Du { v;{s@CM m e.printStackTrace (); oZP:}= F } HL*jRl } CEZ*a 0}= aRg-
rz //日志 aY8>#t? public static void log(String sMsg) Gz$DsaG { eH79,!=2 System.err.println(sMsg); %xkqiI3Ff } P4ot,Q4 Y{um1)k 0Tg/R4dI public static void log(int sMsg) a&4>xZU # { rOH8W System.err.println(sMsg); O*!+D- } Q]7r?nEEhW } e-\J!E'1F ,,b_x@y* 980[]&( /* $UO7AHk **TestMethod.java - C8h$P */ (F~eknJ package NetFox; T?NwSxGo Y!CZ?c)@ )vhHlZ *+ public class TestMethod { w/>k % e:VeP~ ;. /Tv84I^ public TestMethod() nBZqhtr { ///xx/weblogic60b2_win.exe _9""3O try{ '<$(* SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); N2xgyKy~ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !9OAMHa*9 SiteFileFetch fileFetch = new SiteFileFetch(bean); My
Af~&Y+ fileFetch.start(); ,7k)cNstW } ;]+kC catch(Exception e){e.printStackTrace ();} NuW9.6$Jrf 2}'&38wMT RhXX/HFk } LKftNSkg" !#g`R?:g {_KuztJGA public static void main(String[] args) 3-~_F*%ST { ]:Ocu--
new TestMethod(); J1P82=$, } 9akCvY#Q } );7csh% 点击下载更多相关资料
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