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/* &S{RGXj_ **SiteFileFetch.java bhTb[r */ &gVN& package NetFox; we~[ ]
\
import java.io.*; H*RC@O_hv import java.net.*; 0%9 q8M; zT=Ho
j"ThEx0 public class SiteFileFetch extends Thread { Y;dz,}re 2iY3Lsna f2Klt6"9 SiteInfoBean siteInfoBean = null; //文件信息Bean mXRB7k long[] nStartPos; //开始位置 }iXDa?6% long[] nEndPos; //结束位置 \\r)Ue] FileSplitterFetch[] fileSplitterFetch; //子线程对象 2Nu=/tMN long nFileLength; //文件长度 "Gfh ,e boolean bFirst = true; //是否第一次取文件 q+H%)kF boolean bStop = false; //停止标志 1L%CJ+Q#0i File tmpFile; //文件下载的临时信息 8##-EN;ag DataOutputStream output; //输出到文件的输出流 #a/5SZP
Z\ wa<MRt W= //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I
WTwz!+ public SiteFileFetch(SiteInfoBean bean) throws IOException lGV0*Cji { /f:dv?!km siteInfoBean = bean; 6Z>FTz_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); UldXYtGe tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~bM4[*Q7 if(tmpFile.exists ()) |4)>:d { ;,C)!c& bFirst = false; WZ-s--n# read_nPos(); 0t^M3+nc } ?J%1#1L"/ else B -?6M6# { h;C5hU4P nStartPos = new long[bean.getNSplitter()]; L"E7#} nEndPos = new long[bean.getNSplitter()]; <;9I@VYK } 0IwA#[m1` :#LLo}LKp T%.8'9 %824Cqdc } 6*PYFf` _7Rr=_1} 4^p5&5F public void run() JmF l|n/H { iQ tNAj //获得文件长度 o1-m1 <ft //分割文件 3B1XZm //实例FileSplitterFetch #ZJ _T`l //启动FileSplitterFetch线程 h%o%fH&F! //等待子线程返回 gy,ht3 try{ Fu
SL}P if(bFirst) K#%&0D! { sd ,J3 nFileLength = getFileSize(); $h2){*5E{ if(nFileLength == -1) mPOGidxix { K{x\4 System.err.println("File Length is not known!"); g-Mj.owu= } X>1,!I9 else if(nFileLength == -2) X^T:8npxt { (X $=Q6 System.err.println("File is not access!"); %zA;+s$l } q
0$,*[PH else 2QD3&Q9 { 3*]eigi) for(int i=0;i<nStartPos.length;i++) *S]Ci\{_ { Q}1 R5@7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); [=E } &R[ Mc-2 for(int i=0;i<nEndPos.length-1;i++) -d~4A
{ FK:;e
lZ nEndPos = nStartPos[i+1]; _g+JA3sIJ } Vu)4dD! nEndPos[nEndPos.length-1] = nFileLength; |*oZ_gI } ))R5(R } q+Lr"&'Q )T/0S$@ DNOueU //启动子线程 f1`gdQ)H fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; !Z`j2
e} for(int i=0;i<nStartPos.length;i++) aUzBV\Yd} { :V1W/c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MC?,UDNd% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), gcE|#1> nStartPos,nEndPos,i); J,V9k[88 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )2pbpbWX> fileSplitterFetch.start(); {J{+FFsr( } V[{6e // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CpA|4'# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); qS403+Su1= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", dq7x3v^"ZG nEndPos = " + nFileLength); yL%K4$z // fileSplitterFetch[nPos.length-1].start(); y-T| # ^M3~^lV )`SES." //等待子线程结束 !Nu<xq@! //int count = 0; ?p9VO.^5 //是否结束while循环 fdxLAC boolean breakWhile = false; VO,!x~S! RS"H8P4W e>7]w,*| while(!bStop) u}>#Eb { &+a9+y
write_nPos(); /mXBvY Utility.sleep(500); B\<Q ;RI2; breakWhile = true;
*-+&[P]m 3;)>Fs; 1q~+E\x for(int i=0;i<nStartPos.length;i++) 6BY-^"W5` { O?NeSx1 if(!fileSplitterFetch.bDownOver) 3Vsc 9B"w { *YW/_ breakWhile = false; AK&S5F>D+B break; @En^wN } sJ#4(r` } /d0K7F if(breakWhile) j;%-fvd; break; oE<`VY| Wc,_RN- *7*lE"$p //count++; y#>,+a#5 //if(count>4) nnCGg+l
// siteStop(); ~1cnE:x;V } ie;]/va R#xCkl - UQ8M~x5$3% System.err.println("文件下载结束!"); `kOD[* } y]2qd35u_A catch(Exception e){e.printStackTrace ();} &yGaCq;0 } UUSq$~Ct
u*e.yN bnm
P{Ps //获得文件长度 D Gr>
2 public long getFileSize() BsBK@+ZyI { {xwm^p(f int nFileLength = -1; 2uG0/7 try{ s<*XNNE7 URL url = new URL(siteInfoBean.getSSiteURL()); 0F@"b{&0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); EM]s/LD@% httpConnection.setRequestProperty("User-Agent","NetFox"); MJ7 Y#<u +IrLDsd aF)1Nm[ int responseCode=httpConnection.getResponseCode(); GRGzP&}@ if(responseCode>=400) ^sa#8^,K { jL(qf~c_ processErrorCode(responseCode); =3|O%\ return -2; //-2 represent access is error c05TsMF&O }
-%2[2p ;ToKJ6hN|* HuB<k3#sPy String sHeader; S7=Bd[4 pV.Av Nqw&< x+ for(int i=1;;i++) >fe-d#!{ { umD!2
w //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); AP[|Ta //Utility.log(in.readLine()); %R@X>2l/_ sHeader=httpConnection.getHeaderFieldKey(i); 7+]=- if(sHeader!=null) &f!z1d-qg? { bx<RV7>0 if(sHeader.equals("Content-Length")) 6WV\}d: { GMMp|WV| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +hn+K1 break; }~#pEX~j* } xB_!>SqF1U } }MRd@ 0-?! else MHSs!^/g5 break; 8dV=[+ } /<E5"Mm% } Ge,;8N88 catch(IOException e){e.printStackTrace ();} Xua+cVc\y catch(Exception e){e.printStackTrace ();} !v X D yMyE s 8 7G.#O}).b Utility.log(nFileLength); *&?c(JU;< HU%o6c w K/A*<<r
~ return nFileLength; 8d?g]DEN)6 } "5;;)\o~ ?z}=B hZh9uI7. //保存下载信息(文件指针位置) ^[]}R: private void write_nPos() #Xhdn\7 { P/xKnm~ try{ -`<kCW" output = new DataOutputStream(new FileOutputStream(tmpFile)); XpmS{nb output.writeInt(nStartPos.length); bA=
|_Wt for(int i=0;i<nStartPos.length;i++) >wb'QzF: { SGh1 DB // output.writeLong(nPos); n3}!p'-CC output.writeLong(fileSplitterFetch.nStartPos); Of{/t1o? output.writeLong(fileSplitterFetch.nEndPos); KC(xb5x
Y } NLS%S q output.close(); /3eKN } /GIxR6i catch(IOException e){e.printStackTrace ();} ^\\Tx*#i catch(Exception e){e.printStackTrace ();} GKvN*
SU= } t=_J9| ]04e1F1J dYSr4pb //读取保存的下载信息(文件指针位置) \cC%!4 private void read_nPos() I?"q/Ub~h { Vl%^H[] try{ ._8KsuJG DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); la( <8 int nCount = input.readInt(); T32+3wb"I nStartPos = new long[nCount]; gN24M3{C nEndPos = new long[nCount]; '3TW [!m for(int i=0;i<nStartPos.length;i++) `9)t[7 { Z-E`> nStartPos = input.readLong(); *GxTX3i}vc nEndPos = input.readLong(); jov:]Bic } hGd<<\ input.close(); {Z3dF)> } |~'IM3Jw(Y catch(IOException e){e.printStackTrace ();} "`M?R;DH catch(Exception e){e.printStackTrace ();} >tO`r.5u9 } RY c!~Wh~Y t]$P 1*I Eq$&qV-?( private void processErrorCode(int nErrorCode) w4W_iaU { +<xQM h8 System.err.println("Error Code : " + nErrorCode); }Z{=|rVE } Ggl~nxz ,Y|^^?'j
Q bx]N>k J //停止文件下载 .q[SI$qO/ public void siteStop() \2ZPj)&-E { %CS@g.H=_ bStop = true; f 1w~!O9 for(int i=0;i<nStartPos.length;i++) 8>X d2X fileSplitterFetch.splitterStop(); dDm):Z*`b )\6&12rj X5X?&* %{ } 0j30LXI_ } T/^Hz4uA7 //负责部分文件的抓取 Jrg2/ee,* **FileSplitterFetch.java U+)xu>I
*/ 3dht!7/ package NetFox; _<a7CCg 9uRFnzJVx M9y<t' import java.io.*; TUHi5K import java.net.*; wD68tG$ \[gReaI slg ]#Dy public class FileSplitterFetch extends Thread { HPb]Zj ,$'])A?$ Ps%qfL\ String sURL; //File URL AtF3%Zv2 long nStartPos; //File Snippet Start Position Gm9hYhC8 long nEndPos; //File Snippet End Position N@Y ljz| int nThreadID; //Thread's ID )RO<o O boolean bDownOver = false; //Downing is over ~4s'0 w^ boolean bStop = false; //Stop identical KN tt FileAccessI fileAccessI = null; //File Access interface cx}Q2S $/=nU*pd 4m*M,# mV public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException GN!qyT { F)+{AQL this.sURL = sURL; d}JP!xf% this.nStartPos = nStart; 6KVnnK this.nEndPos = nEnd; &^}6
9 nThreadID = id; |1ST=O7.LH fileAccessI = new FileAccessI(sName,nStartPos);//定位 +)j1.X } h$.:Uj8/ 9lGOWRxR) N\HQN0d9 public void run() tID%}Z v { &}?$i7x5 while(nStartPos < nEndPos && !bStop) ;5tazBy&:C { zo[[>MA ~mO62(8m ep=qf/vd< try{ ~=KJzOS,S URL url = new URL(sURL); 0pJ
":Q/2) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZTU&,1Y ; httpConnection.setRequestProperty("User-Agent","NetFox"); n>A98NQ String sProperty = "bytes="+nStartPos+"-"; 2Fz|fW_ httpConnection.setRequestProperty("RANGE",sProperty); VxY+h`4# Utility.log(sProperty); (y?ITz9 =QK$0r]c'k wMdal:n^ InputStream input = httpConnection.getInputStream(); GrTulN? //logResponseHead(httpConnection); `)T~psT :=8t"rO=W em\ 9'L^ byte[] b = new byte[1024]; ,RgB$TcE int nRead; /F4pb]U!* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) C_4)=#@GU { y_HN6 nStartPos += fileAccessI.write(b,0,nRead); 2*N_5&9mE //if(nThreadID == 1) ^Ve<>b // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K"b`#xN(t } b8%C*r7 K
=wBpLB qwK2WE%T Utility.log("Thread " + nThreadID + " is over!"); F:D
orE bDownOver = true; c-g)eV|)S //nPos = fileAccessI.write (b,0,nRead); $&"V^@ } ,SQZD,3v4 catch(Exception e){e.printStackTrace ();} *J+_|_0nlW } Vpr/ } ~}!3G A8q;q 2 F[4;Xq //打印回应的头信息 MB%Q WU public void logResponseHead(HttpURLConnection con) \~BDm { 6m VuyI for(int i=1;;i++) t^[8RhD { v3GwD00 String header=con.getHeaderFieldKey(i); M@3"<[g if(header!=null) @ JvPx 0 //responseHeaders.put(header,httpConnection.getHeaderField(header)); @h*fFiY&{ Utility.log(header+" : "+con.getHeaderField(header)); eL4NB$Fb else "wlt> SU break; f>s?4 } r}0\}~'?c } $t5V=}m> P
i Fm| Fbu5PWhlc public void splitterStop() RN)dS>$ { 3SSm5{197 bStop = true; .e'eE } 6Z`R#d #I Cn>ADWpT& k^ YO%_ } K9vIm4::d$
*]h`KxuO }hYZ"
A~ /* $''9K **FileAccess.java +rIL|c}J *//文件访问(定位,写) })w*m package NetFox; 7HVZZ!>~ import java.io.*; kGL1!=> l ^d[EL+ RZe'Kw - public class FileAccessI implements Serializable{ pGSai& gPu2G/Y //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 sHc Td>xS RandomAccessFile oSavedFile; ]`bQW? long nPos; MWNPPYww 11|Rdd+} h(qQsxIOhS public FileAccessI() throws IOException pDQ}* { lc_E!"1 this("",0); &QG6!`fK}3 } VdP`a(Yd; i/b'4o=8 XX1Il;1G# public FileAccessI(String sName,long nPos) throws IOException Iyd?|f" { T~fmk
f$ oSavedFile = new RandomAccessFile(sName,"rw"); %+ FG ,d this.nPos = nPos; [ >^PRs oSavedFile.seek(nPos); =?h~.lo } 7 Sa1;%R }|B=h 2"fO6!hh public synchronized int write(byte[] b,int nStart,int nLen) ^'p|!`: { A~Xq,BxCV int n = -1; zZiJ 9 e try{ }n7th oSavedFile.write(b,nStart,nLen); bu&t'?zx! n = nLen; aF|d^ } `z0{S! catch(IOException e) -dv%H{ { *WE1;msr e.printStackTrace (); eUl/o1~mXa } l{VSb92f 'xv8Gwf" =&!HwOnp return n; tA$)cg+. } M0|'f' hUz[uyt N$TL;T> } ;pD)m/$h` q!f1~ aG s4 %(>Q /* rdnRBFt **SiteInfoBean.java CSV;+,Vv */ PY3ps2^K. package NetFox; >/<:Q & v(leide 6DL[aD public class SiteInfoBean { "4H8A= fWF|,A>>b ^). ) private String sSiteURL; //Site's URL D;Gq)]O private String sFilePath; //Saved File's Path OzT#1T1'c private String sFileName; //Saved File's Name Dml*T(WM> private int nSplitter; //Count of Splited Downloading File XJ!(F#zc o{*ay$vA] T\VNqs@ public SiteInfoBean() x90jw$\%7 {//nSplitter的缺省值为5 *?yJkJ" //default value of nSplitter is 5 1! p/6 this("","","",5); yMLOUUWa8x } >QHo@Zqj( Gg\G'QU XT,#g-oi public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7ou46v|m5 { VGw(6`|! sSiteURL= sURL; :)jJge&^p sFilePath = sPath; ;Qi }{;+ sFileName = sName; ~#}Dx
:HH this.nSplitter = nSpiltter; <DH*~tLp2 m}$+Hdk+7 BpO9As 1um } ZyR_6n>L$ z"DkFvA A>NsKWf{ public String getSSiteURL() XE}H 3/2 { %o?IsIys return sSiteURL; Pw@olG'Ah } 5&CDHc7Oj rZ_>`}O2 VohhQ public void setSSiteURL(String value) ]%RNA:(F' { P&*sB%B sSiteURL = value; +VEU:1Gt } )[&_scSa @\(v X ] ?IX!+>.H public String getSFilePath() OlxX.wP { Q\{x)|{$ return sFilePath; &"uV~AM } SW(q$i DhI>p0* T *.f2VQ~H public void setSFilePath(String value) >+cVs: { <Wl(9$ sFilePath = value; ,/&Zw01dGN } }tST)=M` ^T4Ay=~{ 2
Tvvq(?T public String getSFileName() h5|.Et { 2aNT#J"_ return sFileName; F5gObIJtuY } Jx-wO/ >s*Drf X6 <
/p8r public void setSFileName(String value) Mo|wME#M { v4*rPGv sFileName = value; % U`xu. } ~3WL)% Q
|i9aE `GQ{*_- public int getNSplitter() RE46k`44 { 6R}j-1
<n return nSplitter; a0Oe:]mo\ } NB8& 1M%S
gV-# }4%/pOi:f public void setNSplitter(int nCount) ]Ql 0v"` F { Az*KsY{/r nSplitter = nCount; d<o.o?Vc } US? Rr } ~el-*=<m _JGs}aQ j kn^Z": /* I#A2)V0P) **Utility.java (!K+P[g */ NVIWWX9? package NetFox; c^I0y! #]KgUc5B 8IY19>4'5J public class Utility { yOHXY& 0=U70nKr S0@T0y# public Utility() LZ~`29qw( { ~o15#Pfn/ T|'&K:[TJ l\q}
|o } )ctr"&- >w'$1tc?+F //线程睡眠 %l9$a`& public static void sleep(int nSecond)
7
Yv!N { mv
Ov<x;l try{ sy<iKCM\ Thread.sleep(nSecond); ahIE;Y\j' } mVH,HqsXa catch(Exception e) H:oQ { SX+RBVZU e.printStackTrace (); #n})X,ip2 } 66ohmP@04Z } ^7XAw:
? }Zl"9A#K //日志 ;[5r7
jHU public static void log(String sMsg) k
'zat3#f { ,-#GX{! System.err.println(sMsg); `<vxG4=62\ } ZCiY,;c tEhr x*8O*!ZZ public static void log(int sMsg) h
W.2p+ { C|e+0aW System.err.println(sMsg); -}<g-*m"q } snMQ"ju } +l\<? T1~)^qQ eK_*q- /* ;) pl{_ **TestMethod.java ~$aTM_4 */ 3IyZunFT package NetFox; Pz~q%J H7e / ?JqjYI{$ public class TestMethod { E$S`6+x`:a |`]oc,1h@ O~'FR[J public TestMethod() #8?^C]*{0 { ///xx/weblogic60b2_win.exe };SV!'9s?~ try{ YOw?'+8 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :EB,{|m //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); mTjm92 SiteFileFetch fileFetch = new SiteFileFetch(bean); b(T@~P/ fileFetch.start(); X4I]9t\ } xXOw:A' catch(Exception e){e.printStackTrace ();} s-6:N9- jH0Bo; 1xC`ZhjcD } J:};n@< ~%P3Pp e[4V%h public static void main(String[] args) Yo'K pdn { (T;9us0 new TestMethod(); 1ih* gJPpj } R+Lk~X^*l' } >l2w::l% 点击下载更多相关资料
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