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/* 'EET3RK-S **SiteFileFetch.java Bd~cY/M */ jl-Aos"/ package NetFox; JBEgiQ/ import java.io.*;
W%9K5(e import java.net.*; zo7XmUI3P mQ60@_"Y=, K#f`_SCW public class SiteFileFetch extends Thread { u$=ogp=0
QXxLe* jvc?hUcLKT SiteInfoBean siteInfoBean = null; //文件信息Bean '}pgUh_ long[] nStartPos; //开始位置 '
ra B long[] nEndPos; //结束位置 iVi3 :7* FileSplitterFetch[] fileSplitterFetch; //子线程对象 Pn'(8bRm long nFileLength; //文件长度 (GcKaUg8* boolean bFirst = true; //是否第一次取文件 nB@iQxcz boolean bStop = false; //停止标志 $:BK{,\
File tmpFile; //文件下载的临时信息 _[vdY|_ DataOutputStream output; //输出到文件的输出流 Lr}b, Ie&b<k //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) eMl]td rI public SiteFileFetch(SiteInfoBean bean) throws IOException ^c0$pqZ}r { y.*=Ww+ siteInfoBean = bean; kuj12 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); KjwY'aYwr: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %][$y7 if(tmpFile.exists ()) [X">vaa { Op/79]$ bFirst = false; H(NT| read_nPos(); 5hH6G } AXh3LA else L740s[,`o# { Jm(&G nStartPos = new long[bean.getNSplitter()]; Q
f+p0E; nEndPos = new long[bean.getNSplitter()]; }EedHS } Ng'ZAG;O _L4<^Etfm
4 %!{?[$ Y!=
k } &J^4Y!gt ^/ DII`A {NY~JFM public void run() yXTK(<' { -q&7J'
N //获得文件长度 "0H56#eW //分割文件 oWx_O-_._ //实例FileSplitterFetch R7B,Q(q2- //启动FileSplitterFetch线程 :e&n.i^ //等待子线程返回 gVnwsE try{ KM6N'x ^z if(bFirst) Y1fy2\<' { @k+%y'Y? nFileLength = getFileSize(); q
M_/ if(nFileLength == -1) ne"?90~ { oGJ*Rn)Z System.err.println("File Length is not known!"); W%>i$:Qq
} ,5\2C{ else if(nFileLength == -2) KZrMf77= { iF [?uF System.err.println("File is not access!"); 4z9#M;qT } c:llOHA else =CjNtD2] { z;y^t4
^9 for(int i=0;i<nStartPos.length;i++) YXX36 { J+71FP`ZH nStartPos = (long)(i*(nFileLength/nStartPos.length)); -3G 4vRIo } 97(Xu=tX
for(int i=0;i<nEndPos.length-1;i++) S$jV|xKB { <}EV*`w4 nEndPos = nStartPos[i+1]; tM^;?HL] } *gd?>P7\0 nEndPos[nEndPos.length-1] = nFileLength; <Qcex3 } )+n,5W } JQ"`9RNb Xq,UV BKC7kDK3H //启动子线程 cebs.sF: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; gV"qV for(int i=0;i<nStartPos.length;i++) `dv}a-Q)c { /ojO>Y[< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Sa;<B:| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), t;.^K\S4 nStartPos,nEndPos,i); @K$VV^wp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %@lV-(5q fileSplitterFetch.start(); Lj&1K~U } n5Nan
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :!JpP
R5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _{LN{iqDv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yn/?=
?0 nEndPos = " + nFileLength); I*A0?{ // fileSplitterFetch[nPos.length-1].start(); 3Q'[Ee2-3 }W:*aU \7Gg2;TA6o //等待子线程结束 ?Oy'awf_ //int count = 0; E0"10Qbi //是否结束while循环 I 1 b boolean breakWhile = false; $J QWfGwR Q_&}^ hrs#ZZ:E while(!bStop) q&XCX$N { M.ZEqV+k write_nPos(); jWH{;V&ZV Utility.sleep(500); f^W[;w breakWhile = true; E?3 0J3S jM5_8nS&d =\~E n5 for(int i=0;i<nStartPos.length;i++) r0\cc6 { ?EI'^xg if(!fileSplitterFetch.bDownOver) lLuID { de> ?*%< breakWhile = false; .:}.b"%m break; #ZG3|#Q=L } <y@,3DD3A9 } p91`<>Iw if(breakWhile) |@ikx{W break; Vbg10pV0 q} ]'Q
- $ A-+E\vQ@ //count++; J DLTOLG //if(count>4) &w+;N5}3 // siteStop(); slU } 51I|0ly ;mDM5.iF i 8l./Yt/ System.err.println("文件下载结束!"); XB0a dp } &|v{#,ymeb catch(Exception e){e.printStackTrace ();} h ?uqLsRl } 06 QU 5Z/yhF.{ 5]jx5!N //获得文件长度 )O,wRd>5 public long getFileSize() 2Y400 { >(hSW~i~ int nFileLength = -1; N>+ P WE$ try{ S8
:"<B) URL url = new URL(siteInfoBean.getSSiteURL()); &J8Z@^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); uxWFM
$ httpConnection.setRequestProperty("User-Agent","NetFox"); V,V*30K5 6}ce1|mkg/ }$o* int responseCode=httpConnection.getResponseCode(); 1hl]W+9 if(responseCode>=400) B\\6# { Lp_$?MCD. processErrorCode(responseCode); `/z_rqJ0CL return -2; //-2 represent access is error k@#5$Ejc2 } EE+`i% UQ/qBbn
s[3e=N String sHeader; $:Rn; FY$fV"s gX[|;IZ0o for(int i=1;;i++) 4|`Yz%' { )h#]iGVN} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h@=7R //Utility.log(in.readLine()); puOC60zI sHeader=httpConnection.getHeaderFieldKey(i); K*~]fy if(sHeader!=null) _@Y"$V]=Vt { n5|l|#c$N if(sHeader.equals("Content-Length")) COR;e`%, { Jlp<koy nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mw_ E&v break; VZ$=6CavH } ^$!987" } WvujcmOf else %m9CdWb=w break; Bs[nV}c>> } wu A^'T } P''X_1oMC catch(IOException e){e.printStackTrace ();} +noZ<KFW
" catch(Exception e){e.printStackTrace ();} S='
wJ@?; Ht#@'x Cezh l Utility.log(nFileLength); oK2pM18 qD#VbvRc9+ bp#:UUO%S return nFileLength; 2R]&v;A } 9M_(He
- Z`Pd2VRp 6SVqRD<` //保存下载信息(文件指针位置)
6xoq;=o private void write_nPos() EM@;3.IO { ibJHU@l try{ -T7xK/ output = new DataOutputStream(new FileOutputStream(tmpFile)); 4[TR0bM% output.writeInt(nStartPos.length); 7{f_fkbs for(int i=0;i<nStartPos.length;i++) [*)Z!) { ZPHXzi3j // output.writeLong(nPos); btH _HE output.writeLong(fileSplitterFetch.nStartPos); c"7j3/p output.writeLong(fileSplitterFetch.nEndPos); V }>n } rz%<AF Z output.close(); \ p4*$ } -?<4Og[^ catch(IOException e){e.printStackTrace ();} V
>Hf9sZ catch(Exception e){e.printStackTrace ();} ;#TaZN } l?/Y !Vheq3"q/ RW_q~bA9 //读取保存的下载信息(文件指针位置) (DDyK[t+VX private void read_nPos() *XbI#L%> { w(j^ccPD try{ mf' ]O, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); eWvo,4 int nCount = input.readInt(); @m~RtC-Q nStartPos = new long[nCount]; ?7jg(`Yh nEndPos = new long[nCount]; QK; T~
_k for(int i=0;i<nStartPos.length;i++) 0)|Q6*E> { w%dL8k nStartPos = input.readLong(); PmR* }Aw nEndPos = input.readLong(); Ri#H.T<' } B@O@1?c[ input.close(); <*|?x86~ } #`;/KNp 9 catch(IOException e){e.printStackTrace ();} WZZ4]cC catch(Exception e){e.printStackTrace ();} 1zftrX~v!X } ~9=aT1S| w8iR|TV @*MC/fe private void processErrorCode(int nErrorCode) FB:<zmwR { #z!^<, System.err.println("Error Code : " + nErrorCode); aRJcSV } 5\Fz! {_#y z\j hXn3,3f3oZ //停止文件下载 YE}s public void siteStop() @]HXP_lyD/ { w!SkWS b,~ bStop = true; l&$$w!n0w for(int i=0;i<nStartPos.length;i++) T[?6[,. fileSplitterFetch.splitterStop(); PUdM[-zjh ;n6b%,s -x`G2i } M+`Hg_#Q } xd-XWXc //负责部分文件的抓取 9}29&O **FileSplitterFetch.java BVw Wj-, */ (k`{*!:1a package NetFox; &|Pu-A"5~ Xm1[V& cK`"lxO import java.io.*; q
o 1lj"P import java.net.*; HKO739&n} !@A#=(4R4 fP HLXg5s public class FileSplitterFetch extends Thread { 7=XL!:P %7hB&[ 5 J*fBZ.NO String sURL; //File URL ILwn&[A0 long nStartPos; //File Snippet Start Position otJ!UfpR8 long nEndPos; //File Snippet End Position a j\nrD1 int nThreadID; //Thread's ID =~KsS}`1, boolean bDownOver = false; //Downing is over !yOeW0/2[ boolean bStop = false; //Stop identical SC &~s$P; FileAccessI fileAccessI = null; //File Access interface jJZgK$5+ C'A]i5 sZ&G%o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException %\$;(#h { B>y9fI this.sURL = sURL; jZoNi this.nStartPos = nStart; }/P5>F<H[ this.nEndPos = nEnd; 7piuLq+ nThreadID = id; !T,AdNa8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 8}e,%{q } ul f2vD 6t'l(E + AJ^#eY5 public void run() {yA$V0`N{ { Q&'}BeUbm while(nStartPos < nEndPos && !bStop) JRMM? y { Wu6<\^A 'b*%ixa U-kVNBs try{ Q7X3X, URL url = new URL(sURL); B[4pX
+f HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {<>K]P~wD httpConnection.setRequestProperty("User-Agent","NetFox"); sOCs13A" String sProperty = "bytes="+nStartPos+"-"; WY:&ugGx httpConnection.setRequestProperty("RANGE",sProperty); in`aGFQO Utility.log(sProperty); &sXRN&Fp <#GB[kQa gb=/#G0R InputStream input = httpConnection.getInputStream(); 6[E| //logResponseHead(httpConnection); F0vM0e- ?ULo&P[ z+ a%5J byte[] b = new byte[1024]; '})0!g<Y int nRead; P|tNL}2`; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `+:.L>5([ { !HeSOzN nStartPos += fileAccessI.write(b,0,nRead); G`fC/Le //if(nThreadID == 1) /walu+]h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *+'2?* } (+<1*5BEkT )Or.; 73#x|lY Utility.log("Thread " + nThreadID + " is over!"); [YrHA~=U bDownOver = true; &N~ZI*^ //nPos = fileAccessI.write (b,0,nRead); UO*Ymj
1 } [%Bf<
J< catch(Exception e){e.printStackTrace ();} bwM@/g%DL } !o=U19) } }]n$ %g( +Q=1AXe `LAR@a5i //打印回应的头信息 l
{jmlT public void logResponseHead(HttpURLConnection con) ?{w3|Ef& { -Y
Bd, k3 for(int i=1;;i++) 'bld,Do6 { *KY=\
%D String header=con.getHeaderFieldKey(i); hQ6a~?f if(header!=null) .h&k jD //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;$Y4xM`=m Utility.log(header+" : "+con.getHeaderField(header)); l\M_-:I+4 else
z@|GC_L break; ;,i]w"* } i
wxVl)QL } )[mwP.T= 5zFR7/p{ dVB~Smsr public void splitterStop() "s!7dKXI" { kr$b^"Ku bStop = true; jdE5~a+ } -C(b,F%% 9% l% Yt|6
X:l } YEkh3FrbwH .<tquswg
t#%R
q /* '>$]{vQ3 **FileAccess.java MX4]Vpv *//文件访问(定位,写) s&\I=J. package NetFox; B+^(ktZp@ import java.io.*; \AL
f$88>@ h~{aGo 7eWk7&Xul public class FileAccessI implements Serializable{ Mu'8;9_6 pdJ/&ufh //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;nC.fBu RandomAccessFile oSavedFile; V=fEPM long nPos; <mi-}s S=_vv)6+4 2z\zh[(w public FileAccessI() throws IOException z'uK3ng\hH { HB
Iip? this("",0); l;y7]DO } O6IB.
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c dl hdsj: public FileAccessI(String sName,long nPos) throws IOException >^XBa*4;Y { P/EM : oSavedFile = new RandomAccessFile(sName,"rw"); J|'7_0OAx this.nPos = nPos; Ut$;ND.- oSavedFile.seek(nPos); kP/M<X" } v1a6?- gX0R)spg r$]HIvJD public synchronized int write(byte[] b,int nStart,int nLen) dnV[ P { 1hcjSO int n = -1; Or
!+._3i try{ .U T@p oSavedFile.write(b,nStart,nLen); 8]&i-VFof n = nLen; Q{B}ef } M33_ja +L catch(IOException e) /-bO!RTwf { aW!@f[%~F e.printStackTrace (); A:7k+4 } JK.ZdY% 3;%5Yu ^bEc6`eE return n; L%>n>w } R(n^)^? E;<l(.Ar
ox+ 3U } <7-J0btV
QtvY v! 4)1s M=u /* detwa}h[0 **SiteInfoBean.java f4L`.~b'hb */ TEDAb> package NetFox; rj6#1kt $H+VA@_ e["2QIOe public class SiteInfoBean { LBF 1;zjK v@e~k-# gUeuUj private String sSiteURL; //Site's URL 'uq#ai[5I private String sFilePath; //Saved File's Path 4.IU!.Uo private String sFileName; //Saved File's Name ;|UF)QGa2 private int nSplitter; //Count of Splited Downloading File bQ~j=\[r sg+uBCGB }1>[ public SiteInfoBean() 2(/g} {//nSplitter的缺省值为5 i+gQE! //default value of nSplitter is 5 3E3HL7 this("","","",5); ,\qs4& } ;]_o4e6\p E*jP8 7g ?s:d[To6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 44-R! {
<vXGi sSiteURL= sURL; 8P=o4lO+ sFilePath = sPath; C`5 sFileName = sName; OK\A</8r this.nSplitter = nSpiltter; w:
>5=mfk Y[L-7^o@y q7"7U=W0 } =2@B& A'2w>8 a{[x4d,z public String getSSiteURL() 1&e} ms { qu|B4?Y/CR return sSiteURL; .|/~op4; } "_`F\DGAZu $^@ ) wQRZ"ri, public void setSSiteURL(String value) L:9F:/G { &LbJT$}V sSiteURL = value; !E T~KL! } [ :zO}r: )KP5WudX @r?Uua public String getSFilePath() [o?*"c { p1vp8p return sFilePath; $ aUo aI } 48Mpf=f` X,LD ` \+@Fwfx public void setSFilePath(String value) ~V$|i" { \|K;-pL sFilePath = value; Uf, 4 } c
9jGq $ibuWb"a Q9Q|lO public String getSFileName() $]8h $ { d'Zqaaf k% return sFileName; '7oA< R } ,u/aT5\_ xKFn.qFr 7PkJ-JBA public void setSFileName(String value) Y*!qG { yR4|S2D3xn sFileName = value; u?+Kkkk } /r=tI)'$ ~{Mn{ n(el]_d public int getNSplitter() -Y='_4s { Q_t`.jus return nSplitter; !tp1:'KG } v;0|U:`] 5Lf{8UxI TY Qwy* public void setNSplitter(int nCount) qkC/\![@ { VH[hsj nSplitter = nCount; Qm/u h } DoeiW= } RoyPrO [3 W>O~-2 39=1f6I1 /* d$
^ ,bL2p **Utility.java gmm|A9+tv */ >Bgw}PI package NetFox; X@f "-\ $ mI0Bk vPD]hs public class Utility { |M+<m">E rs~wv(' ObiT-D?)g public Utility() g]c 6&Y,# { VhNz8) ]GRWnif EbdfV-E } TsGE cxIg z-b*D}& //线程睡眠 kP?KXT3y public static void sleep(int nSecond) et }T%~T { [AW"
D3 try{ ]Ei0d8Uo Thread.sleep(nSecond); 'CN|'W)g7 } *;fw%PW catch(Exception e) =|YxDas { ;]pJj6J&v e.printStackTrace (); D`VM6/iQR } ph-ATJ" } ^Y
iJV7 %b"\bHH //日志 1[yq0^\]M[ public static void log(String sMsg) ('hEr~& { Ck!VV2U# System.err.println(sMsg); +*hm-lv? } :Cp'm'omb /=gOa\k|p 2^l[(N public static void log(int sMsg) =hMY2D { R<=zCE `: System.err.println(sMsg); ~>+]%FPv } LH@j8YB5u } Yx>"bv >`%'4<I 2!$gyu6bpG /* q@xBJ[IM **TestMethod.java HdPoO; */ 0JJS2oY/ package NetFox; lj?v4$ ;asP4R= QJ7L7S public class TestMethod { l!g]a2x* $.[#0lCI pe{;~-|6 public TestMethod() y})70w@+_ { ///xx/weblogic60b2_win.exe g=$1cC+( try{
''Cay0h SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,qYJioWX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); [ U wi SiteFileFetch fileFetch = new SiteFileFetch(bean); R]i7 $}n fileFetch.start(); as>L[jyG/ } C,.Ee3T catch(Exception e){e.printStackTrace ();} *Otg*,\ mI>,.&eo -P]sRl3O; } 2[r^M'J [Ts"OPb%~ hjQ~uqbg public static void main(String[] args) U\sHx68 { = hN
!;7G new TestMethod(); }ga@/>Sl& } S*,rGCt'T } w#g#8o>' 点击下载更多相关资料
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