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/* -W>zON|l **SiteFileFetch.java La}=Ng */ ,)+O.Lf7&. package NetFox; j#%*@]>Tg import java.io.*; g#=^U`y import java.net.*; R{.wAH( aisX56Lc 57+^T}/> public class SiteFileFetch extends Thread { ?,|_<'$4T 6X5m1+ Oi^ De|@}@ SiteInfoBean siteInfoBean = null; //文件信息Bean PpN+q:( long[] nStartPos; //开始位置 WT(R =bLw long[] nEndPos; //结束位置 ox {Cm FileSplitterFetch[] fileSplitterFetch; //子线程对象 O*oL(dk*8L long nFileLength; //文件长度
3 Yl[J;i boolean bFirst = true; //是否第一次取文件 9!V<=0b/ boolean bStop = false; //停止标志 ]\P File tmpFile; //文件下载的临时信息 iZ[o2Tre DataOutputStream output; //输出到文件的输出流 ,%dn)gt7 ;BoeE3*
6 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) e,I-u'mLQs public SiteFileFetch(SiteInfoBean bean) throws IOException M:?eK
[h { M 0-> siteInfoBean = bean; |6\ ?"# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _}Jz_RS2` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Yl1@gw7 if(tmpFile.exists ()) zEY
Ey1 { >T~{_|N bFirst = false; l;Zc[6 read_nPos(); CT4R/wzY7 } )+w0NhJw else r3ZY`zf { #eE:hiu<v nStartPos = new long[bean.getNSplitter()]; u4o%qK nEndPos = new long[bean.getNSplitter()]; #:Cr'U } 2ok>z$Y ..;LU:F (B]Vw+/ l%B1JGu*F } nC`#Hm.V% Tjure]wQz *GuCv3| public void run() ~2A<fL,- { sut j
G`m //获得文件长度 ?Pmj }f //分割文件 iCk34C7 //实例FileSplitterFetch biGaP#"0 //启动FileSplitterFetch线程 GLc+`,. //等待子线程返回 ?h>mrj try{ 1Sz5&jz if(bFirst) >!? f6
{\| { P9`i6H'~ nFileLength = getFileSize(); ~`tc|Zu if(nFileLength == -1) k1-?2kf"{ { WF-imI:EK System.err.println("File Length is not known!"); RWTv,pLK } hPFIf>%} else if(nFileLength == -2) XNu2G19jb { KU33P>a"[k System.err.println("File is not access!"); .:RoD?px } [Z
Ea3/ else |hp_X>Uv' { O";r\Z for(int i=0;i<nStartPos.length;i++) j-
F=5)A { $BH0W{S nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0?,EteR } .M:,pw"S] for(int i=0;i<nEndPos.length-1;i++) *o"F.H{#N { +<
BAJWU nEndPos = nStartPos[i+1]; m}Tu^dy } 8Yq6I>@! nEndPos[nEndPos.length-1] = nFileLength; 1ygu>sKS&A } m
U7Ad" } "c\T S2jo@bp! NX)7g}S //启动子线程 gWgK fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; qLYv=h$, for(int i=0;i<nStartPos.length;i++) d2X#_(+d { V=(4
c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
]g?G0m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _IpW& nStartPos,nEndPos,i); HTx7._b Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FLy|+4D_%4 fileSplitterFetch.start(); , PN?_N } 103^\Av8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), k )){1O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); B u4N~0 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", *QLl
jGe nEndPos = " + nFileLength); 4\sS // fileSplitterFetch[nPos.length-1].start(); d G:=tf&1R >b*Pd
*f |Ca$>]? //等待子线程结束 {8I93] //int count = 0; Uk*s`Y //是否结束while循环 ol`]6"Sc boolean breakWhile = false; ^Gs!" Y kf5921(P PrN?;Z. while(!bStop) yx/:<^"-$ { NmtBn^t write_nPos(); %8{' XJ! Utility.sleep(500); yY_]YeeR breakWhile = true; ]Dx?HBM"DC kt;X|`V{5z =}c~BHT for(int i=0;i<nStartPos.length;i++) [BV{=;iD { n }MG if(!fileSplitterFetch.bDownOver) VCc4nn# { dd4yS}yBlR breakWhile = false; kP;Rts8JD break; Vl9\&EL } b$gDFNa } )UJ]IB-Q|1 if(breakWhile) \-sDRW break; EKoCm)}d kc"U)> )0d3sJ8 //count++; +Tu:zCv. //if(count>4) Bq@G@Qi // siteStop(); cIgFSwQ4 }
,:z@Ji }l[t0C
t ,[Ytl System.err.println("文件下载结束!"); DTr0u}m } Vx#xq#wK catch(Exception e){e.printStackTrace ();} Tp0Tce/ } %|,j'V$ D@j `'&G TkQ05'Qc //获得文件长度 J\ 3~ public long getFileSize() 74Kl!A { MOOL=Um3 int nFileLength = -1; cxmr|-^ try{ @P@t/ URL url = new URL(siteInfoBean.getSSiteURL()); ^R2:Z&Iv% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ("9)=x *5 httpConnection.setRequestProperty("User-Agent","NetFox"); 7v\OS- #D}NT*w/ ]7br*t^zv int responseCode=httpConnection.getResponseCode(); _|s{G if(responseCode>=400) ^,`yt^^A { b8`O7@ar processErrorCode(responseCode); *.~M#M 9c return -2; //-2 represent access is error 5B@&]-'~ } m$$U%=r>@ NVOY,g=3X -aec1+o String sHeader; o!j? )0d O"{NHNG\oT 7W 4[1 for(int i=1;;i++) Wk$%0xZ7 { ~>qcV=F^d, //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *d)B4qG //Utility.log(in.readLine()); XLOk + Fn sHeader=httpConnection.getHeaderFieldKey(i); $)PNf'5Zg if(sHeader!=null) :MJTmpq, { rVZkG,Q if(sHeader.equals("Content-Length")) 1 "4AS_Q { 9v/1>rziE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `XI1,&Wp7 break; `+i<:,z-gs } $e0sa=/ } J/)Q{*`_ else sdrE4-zd break; ZfIQ Fh> } g9
g
&] } j1>1vD-`T catch(IOException e){e.printStackTrace ();} T}U`?s`) catch(Exception e){e.printStackTrace ();} zi<C5E` XFH7jHnL+U ,Y}HP3
Utility.log(nFileLength); .,feRK>3 Vbz$dpT *n}{)Ef return nFileLength; >a]{q^0 } X$J %m{h1UQQ+ WG1x:,- //保存下载信息(文件指针位置) l? 7D0
private void write_nPos() d)9=hp;,V { o2&mhT try{ ,@(lYeD" output = new DataOutputStream(new FileOutputStream(tmpFile)); z!?xz output.writeInt(nStartPos.length); $1/yc#w
u for(int i=0;i<nStartPos.length;i++) ql^n=+U { h\:"k_u# // output.writeLong(nPos); 7!z0)Ai_>= output.writeLong(fileSplitterFetch.nStartPos); !~PV\DQN output.writeLong(fileSplitterFetch.nEndPos); vr2t MD } W!htCwnkF output.close(); .y|* } A)'{G catch(IOException e){e.printStackTrace ();} 9Yd<_B# catch(Exception e){e.printStackTrace ();} Ptn0;GC } /_>S0 $xNZ.|al G4]T //读取保存的下载信息(文件指针位置) Qp]V~s( private void read_nPos() arRbq!mO { 51l : try{ kwWDGA?zFB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); S0du,A~ int nCount = input.readInt(); arET2(h nStartPos = new long[nCount]; r
",..{ nEndPos = new long[nCount]; =`99ez+y for(int i=0;i<nStartPos.length;i++) FL9Dz4 { O_*%_S}F& nStartPos = input.readLong(); 3Vs8"BFjz nEndPos = input.readLong(); 0.=dOz r } M;-PrJdyt input.close(); 7S}NV7 } UM3}7| catch(IOException e){e.printStackTrace ();} &r doMc;
catch(Exception e){e.printStackTrace ();} Qw}uB$S> } u{o3 RG0kOw0 l|j private void processErrorCode(int nErrorCode) fX2sjfk { F}wy7s2i System.err.println("Error Code : " + nErrorCode); P XKEqcQR } whxTCI V +DU^"q= <Z5-?wgf9 //停止文件下载 _Dr9 w&;< public void siteStop() L7;8:^ v { ($'W(DH4 bStop = true; < KGq for(int i=0;i<nStartPos.length;i++) _wH>h$E fileSplitterFetch.splitterStop(); %<8`(Uu5 HCfme<' ;x%"o[[> } EMQGP<[ } 4a}[&zm(5 //负责部分文件的抓取 0xVw{k}1U **FileSplitterFetch.java V^Y'!w\LGI */ }C4wED. package NetFox; GXC,p(vbE _Ne fzZWUJ ttOk6- import java.io.*; ~=va<%{
U import java.net.*; VWq]w5oQO .DNPL5[v v%:VV*MxF public class FileSplitterFetch extends Thread { TZ&X0x8 CRBj> vjjVZ String sURL; //File URL J3 `0i@ long nStartPos; //File Snippet Start Position IjGPiC long nEndPos; //File Snippet End Position H-vHcqFx3 int nThreadID; //Thread's ID d~1uK-L]* boolean bDownOver = false; //Downing is over rk6K0TQ8 boolean bStop = false; //Stop identical 27k(`{K FileAccessI fileAccessI = null; //File Access interface _j+!Fd a`L:E'|B9 m9vX8;. public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException eU\xOTl~<{ { _f'v>"K this.sURL = sURL; 85YUqVi9 this.nStartPos = nStart; 84vd~Cf9 this.nEndPos = nEnd; aaP_^m O nThreadID = id; NV7k@7_{B fileAccessI = new FileAccessI(sName,nStartPos);//定位 !_vxbfZO } SE'!j]6jI +D@5zq:5 \?pyax8 public void run() tI1OmhNN { LH)XD[ while(nStartPos < nEndPos && !bStop) I)tiXcJw { ]?pQu '-( (`S^6-^ M@#T`aS try{ 9.8%Iw URL url = new URL(sURL); vfc:ok 1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); s3HVX' httpConnection.setRequestProperty("User-Agent","NetFox"); -8xf}v~u String sProperty = "bytes="+nStartPos+"-"; Wl |5EY httpConnection.setRequestProperty("RANGE",sProperty); As< B8e] Utility.log(sProperty); +x(#e'6p R*:>h8 [% C,&h5 InputStream input = httpConnection.getInputStream(); s bj/d~$N //logResponseHead(httpConnection); Keozn*fzI kk%3 2(By CJ*
D byte[] b = new byte[1024]; _Z23lF9 int nRead; 8LbwEKl while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )\|+G5#` { ]QhTxrF" nStartPos += fileAccessI.write(b,0,nRead); W7^[W. //if(nThreadID == 1) 5BJE // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -~mgct5 } $#q`Y+;L2 #L~i|(=U5 &)Xc'RQ.C Utility.log("Thread " + nThreadID + " is over!"); Lm
TFvZ bDownOver = true; &^r>Q`u
//nPos = fileAccessI.write (b,0,nRead); OvtE)ul@ } DMM<,1 catch(Exception e){e.printStackTrace ();} 51SmoFbMz } X*QS/\ } P(hGkY=( X_]rtG BH">#&j[ //打印回应的头信息 maXg(Lu public void logResponseHead(HttpURLConnection con) 5J10S { $@>0;i:: for(int i=1;;i++) Ix5&B6L8 { _!nsEG
VV String header=con.getHeaderFieldKey(i); b6bs . if(header!=null) ;f[lq^eV //responseHeaders.put(header,httpConnection.getHeaderField(header)); l4>^79* * Utility.log(header+" : "+con.getHeaderField(header)); U[@y8yN6M else m^k0j/ break; zaqX};b } |_V(^b} } y0%1YY U ? +_\ 4J2^zx,H public void splitterStop() }yz>(Pq { "8xAe0-4 bStop = true; ]:P7}Kpb } (N7uaZ?Z S6TNu+2w4 bGPE0}b } ~HZdIPcC e$# *t CKYg!\g(: /* =p+y$ **FileAccess.java E
TT46%Y *//文件访问(定位,写) S<tw5!tJ package NetFox; Lo%n{*if import java.io.*; Gv:~P_vBH[ #BC"bY b 7UJ public class FileAccessI implements Serializable{ >STtX6h ]A*}Dem*5 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 rE3dHJN; RandomAccessFile oSavedFile; UUah5$Iy long nPos; ;cor\R ;]{ee?Q^ld B,%Vy!o public FileAccessI() throws IOException wA)
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{ Lc3&\q
e this("",0); 8-q^.<9 } ]Bhy=1 oBzl=N3< {/'T:n# public FileAccessI(String sName,long nPos) throws IOException y0zMK4b { +P/kfY" oSavedFile = new RandomAccessFile(sName,"rw"); W(, j2pU this.nPos = nPos; 3/G^V'Yu oSavedFile.seek(nPos); 34@ [ZKJ5 } 8v4}h9*F"7 Sc)^k _?{7%(C public synchronized int write(byte[] b,int nStart,int nLen) JJ?{V: {
Ei;tfB int n = -1; C|'DKT4M& try{ ([>ecS@eO oSavedFile.write(b,nStart,nLen); K7
e~%mY n = nLen; [a=exK } iI3:<j
l catch(IOException e) J2UQq 7-y { q7R]!zk e.printStackTrace (); gFDnt } ]%Q!%uTh k6G
_c;V I \:WD" return n; &V"oJ}M/a } !X>u.}?g e+
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v+c>iI /* d2k-MZuT6 **SiteInfoBean.java K/Q"Z* */ t@q'm.:uw< package NetFox; +H)'(< Q8p6n .Y)[c.,j public class SiteInfoBean { !Ok(mgV$/ -YRIe<}E - F:{*4b private String sSiteURL; //Site's URL HU3:6R& private String sFilePath; //Saved File's Path m'4f'tbN private String sFileName; //Saved File's Name ?J}Q&p. private int nSplitter; //Count of Splited Downloading File $( hT{C,K $] 6u#5 @MW@mP)# public SiteInfoBean() +-9vrEB {//nSplitter的缺省值为5 @6u/)>rI //default value of nSplitter is 5 7|rH9Bc{U this("","","",5); tne_]+ } sZ;|NAx) D6 B-#u!M @^{Hq6_`
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Kxe\H'rR { ]9@:7d6 sSiteURL= sURL; C2
N+X ( sFilePath = sPath; a#oROb-*~ sFileName = sName; 7Ai?}%b- this.nSplitter = nSpiltter; sNf& "C!; tUn>=>cWP "wUIsuG/p } m|*B0GW !avol/* bO~y=Pa\ public String getSSiteURL() eP{srP3 9 { QX,$JM3 return sSiteURL; @gUp9ZwtH } k.J%rRneN `e[S Zj\ i'tMpS3 public void setSSiteURL(String value) Hv,|XE@Y { ^r}c&@ sSiteURL = value; ggso9ZlLu+ } FO{=^I5YA *$p*'vR 2"/MM2s public String getSFilePath() dFg>uo { JK,MK| return sFilePath; V&Y`?Edc } *k?:k78L rPxRGoR ,H7X_KbFD4 public void setSFilePath(String value) "N4^ ^~s { )f8>kz( sFilePath = value; {v={q1 } kHM Jh~ `sjY#Ua< e=amh public String getSFileName() 5eAZfe%H { 4&)sROjV= return sFileName; %h.zkocM } Bk8}K=%w <JPN<
Kv cXweg; public void setSFileName(String value) ,05PYBc3 { y<`5 sFileName = value; d3%qYL_+a } 7UTfafOGX `IHP_IfR )W\)37=. public int getNSplitter() p.8 bX { 79DNNj~ return nSplitter; ixTjXl2g } jCd]ENl+_ ]3r}>/2( Upz)iOqLi public void setNSplitter(int nCount) F`=p/IAJK { 0d2P nSplitter = nCount; (3e.q'
} 4:MvC^X~z } Jb,54uN .G/Rh92 vG |!d+ /* z']6C9m} **Utility.java xj5TnE9^ */ KGt: package NetFox; KpN]9d XG#?fr}L &YFe"C public class Utility { >N&{DJmD ^}
{r@F *F$@!ByV public Utility() TE`5i~R* { Va!G4_OT ^[hAj>7_8$ =OufafZb } 7cc^n\c?Y -jQ*r$iRE //线程睡眠 hqRC:p#9 public static void sleep(int nSecond) 0kJ8H!~u { Y e0,0Fpw try{ lHiWzt
u Thread.sleep(nSecond); ~[H8R|j " } h!tpi`8\z catch(Exception e) 2EgvS!" { @@R Mm$ e.printStackTrace (); }L0
[Jo: } (bm^R-SbB } fY]"_P |v+z*}fKw //日志 wv~:^v' public static void log(String sMsg) @Y0ZW't { xMbgBx4+ System.err.println(sMsg); .!1[I{KU } 3f=ZNJ> sY<UJlDKT r8"2C# public static void log(int sMsg) =gF035 { 6R :hs C$ System.err.println(sMsg); w!lk&7Q7Z } zJXK:/ } Dgz,Uad8f 'Agw~
&$ +~n:*\ /* #7;?Ls **TestMethod.java 2:
QT`e& */ 628iN%[- package NetFox; 5V 2ZAYV -!!]1\S*Y y)zZ:lyIq public class TestMethod { ^cZ< .d2 GVhqNy
cs6oD!h public TestMethod() <M9NyD` { ///xx/weblogic60b2_win.exe 'p5M|h\:T try{ ILr=<j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +cfcr* //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Y. J!]| SiteFileFetch fileFetch = new SiteFileFetch(bean); "U^m~N9k{ fileFetch.start(); `h'+4 } lEl.'X$ catch(Exception e){e.printStackTrace ();} A~xw:[zy$a 'goKYl#1Q +yI$4MY } \me5"ZU XQ~Xls%]
_-BP?'lN public static void main(String[] args) D\M"bf>q1 { 3IRur,|' new TestMethod(); .xqi7vVHZ } PVg<Ovi^d } pO *[~yq5 点击下载更多相关资料
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