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/* "Ij I'c **SiteFileFetch.java I0Ia6w9 */ ?ny= package NetFox; uh3)0.nR import java.io.*; xBM>u,0.F import java.net.*; `'4)q}bB =
[@)R!3H :nJgwp()@ public class SiteFileFetch extends Thread { ?vtX"Fdz &xd.Qi2 smy}3k SiteInfoBean siteInfoBean = null; //文件信息Bean v;2CU long[] nStartPos; //开始位置 4{na+M long[] nEndPos; //结束位置 S\x=&R z FileSplitterFetch[] fileSplitterFetch; //子线程对象 p9[6^rjx8 long nFileLength; //文件长度 >s EjR! boolean bFirst = true; //是否第一次取文件 ql{_%x? boolean bStop = false; //停止标志 L8$1K &! File tmpFile; //文件下载的临时信息 Ib`-pRU; DataOutputStream output; //输出到文件的输出流 yi6N-7 `wz[='yM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) pmc=NTr&< public SiteFileFetch(SiteInfoBean bean) throws IOException 3=.Y,ENM; { On_@HQ/FI siteInfoBean = bean; })F*:9i* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1= VJ&D; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 6^F'|Wh if(tmpFile.exists ()) P,xwSvO#M { '+y_\ bFirst = false; 9^ed-h
Bf read_nPos(); KG9t3<-` }
gwB\<rzG else Qyh/ed/ { yW7'? nStartPos = new long[bean.getNSplitter()]; |zsbW9
W*m nEndPos = new long[bean.getNSplitter()]; 7=}F{U } ocR dbmS @cvP0A [0;buVU. 6z,Dyy]tl } GF<[ } sfD5!Z9#1 Kx`/\u=/ public void run() oOU1{[ { Pcd *">v //获得文件长度 WrGK \Vw[ //分割文件 TpfZ>d2 //实例FileSplitterFetch Ty4S~ClO#' //启动FileSplitterFetch线程 5]Da{Wmgs //等待子线程返回 .IrNa>J~ try{ :z"!kzdJ if(bFirst) #?O& { #J\rv' nFileLength = getFileSize(); *|:Q%xr- if(nFileLength == -1) #KpY6M-H { eny/
fm System.err.println("File Length is not known!"); m.Lij!0 } B;#J"6w else if(nFileLength == -2) k[|~NLB8 { ixfdO\nU System.err.println("File is not access!"); 1}m3; } IVvtX} else l&(l$@t { 3c'#6virz for(int i=0;i<nStartPos.length;i++) ;/O#4]2* { lx0~>K] nStartPos = (long)(i*(nFileLength/nStartPos.length)); rxZi8w>} } qv2!grp]*W for(int i=0;i<nEndPos.length-1;i++) R[[ ,q:4 {
m]Y;c_DO: nEndPos = nStartPos[i+1]; K`%tGVY } 0HeD{TH\ nEndPos[nEndPos.length-1] = nFileLength; \.{AAj^qD } X"asfA[6K } },-* (GKpA}~R wEft4o //启动子线程 ,ZE?{G{tuj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :*i f for(int i=0;i<nStartPos.length;i++) {=:#S+^ER { fL*T3[d fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,I.WX,OR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?,knit2x nStartPos,nEndPos,i); -%c<IX>z9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6cS>bl fileSplitterFetch.start(); X*eW#|$\ } w|Cx>8P8@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uBnoQ~Qd[z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); K!z` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", p]G3)s@> nEndPos = " + nFileLength); w!^~<{Kz // fileSplitterFetch[nPos.length-1].start(); k;yw#Af8 ]2SF9p_ R3.*dqo$ //等待子线程结束 `8_z!) //int count = 0; CON0E~" //是否结束while循环 )Di \_/G boolean breakWhile = false; \Q$HXK g(x9S'H3l +JyUe
while(!bStop) k\r(=cex6 { < B g8,; write_nPos(); ;T +pu>) Utility.sleep(500); QfjN"25_ breakWhile = true; H U+ I E; Y;r" T?
,P*l for(int i=0;i<nStartPos.length;i++) "UVFU-Z { zDOKShG if(!fileSplitterFetch.bDownOver) h11.'Eej` { %b2oiKSBx? breakWhile = false; e(
X|3h| break; LaMLv<)k } UL@9W6 } !c#]?b% if(breakWhile) V7Yaks break; X|LxV] ;QCrHqRT` H6TD@kL9Wr //count++; *>8ce-PV //if(count>4) ZAKeEm2A // siteStop(); d 4?d4;{ } Mz]:}qmFA 5sO@OV\
y `YBkF System.err.println("文件下载结束!"); Y4.Eq+$gh } [V8fu
qE> catch(Exception e){e.printStackTrace ();} M\<w#wZ } E ]9\R Lv[OUW#S (@0O //获得文件长度 'T=~jA7SkT public long getFileSize() ./6<r OW { 0C%W&;r0 int nFileLength = -1; eJCjJ) try{ 6vKS".4C URL url = new URL(siteInfoBean.getSSiteURL()); una%[jTc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nKr9#JebRC httpConnection.setRequestProperty("User-Agent","NetFox"); K4Dp:2/K% |]=2 }%1w Y/ot3[ int responseCode=httpConnection.getResponseCode(); ^eYqll/U if(responseCode>=400) SO\/-]9# { 7%?jL9Vw processErrorCode(responseCode); _,74)l1 return -2; //-2 represent access is error yF._*9Q3hK } G_H?f\/ oEz%={f T GB_~Bqe String sHeader; BG&cQr "t=hzn"~% Joe_PS for(int i=1;;i++) SlLw{Yb7\. { R8ONcG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); t`'iU$:1f //Utility.log(in.readLine()); 4\ c,)U} sHeader=httpConnection.getHeaderFieldKey(i); q"qo.TPh|$ if(sHeader!=null) zLw{ {| { lq:}0 <k if(sHeader.equals("Content-Length")) zhI#f0c {
6M.;@t,Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /c2'dJ(H break; =SOe}! } ?|{XZQ~ } 3oZ=k]\ else '|>9C^E9X break; uQb!= ] } bAk&~4Y_" } T^<>Xiam catch(IOException e){e.printStackTrace ();} r\6"5cQ= catch(Exception e){e.printStackTrace ();} 3Ug ZSy?T 2L_6x<u' Utility.log(nFileLength); AdZ;j6# #%@*p,xh gwd (N return nFileLength; nP~({:l8X }
6 Si-u 5v\!]?(O; w9RS)l2FQ //保存下载信息(文件指针位置) M@1r:4CoKH private void write_nPos() vR6Bn { x3ERCqTR try{ 5l-mW0,MK output = new DataOutputStream(new FileOutputStream(tmpFile)); 3ss6_xd+ output.writeInt(nStartPos.length); ^\:8w0Y^ for(int i=0;i<nStartPos.length;i++) q-ES6R { `~UZU@/x // output.writeLong(nPos); |tzg:T; output.writeLong(fileSplitterFetch.nStartPos); bOp54WI-g output.writeLong(fileSplitterFetch.nEndPos); 1{Mcs%W;w5 } FSuAjBl0- output.close(); i JxQB\x } h0Z{,s} catch(IOException e){e.printStackTrace ();} g$:Xuw1 catch(Exception e){e.printStackTrace ();} Si9Z>MR } Q^K "8 ; 8.=\GV \,Lo>G`! //读取保存的下载信息(文件指针位置) ;8S/6FI private void read_nPos() >N\0"F7. { t2" (2 try{ l%z< (L5 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *Oc.9 F88" int nCount = input.readInt(); Awv`) "RAR nStartPos = new long[nCount]; %owsBO+ nEndPos = new long[nCount]; yV3^Qtb! for(int i=0;i<nStartPos.length;i++) ZD#9&q'4< { vKwQXR~C nStartPos = input.readLong(); Z}A%=Z\/3 nEndPos = input.readLong(); >>Ts?? } Cp`j/rF input.close(); p,pR!qC> } @4(k( catch(IOException e){e.printStackTrace ();} SQ,?N
XZ catch(Exception e){e.printStackTrace ();} <!$:8ls } S_T^G` [ Sw`RBN[ yo $uui:wU%Q private void processErrorCode(int nErrorCode) WnwhSr2 { \k`n[{ System.err.println("Error Code : " + nErrorCode); (C]
SH\ } LWsP ya ']-@?sD$ CxhY$%C (L //停止文件下载 '$As<LOEd/ public void siteStop() Q(d9n8 { oBq 49u1 bStop = true; q{2I_[p for(int i=0;i<nStartPos.length;i++) o~FRF0f*VP fileSplitterFetch.splitterStop(); 49Df?sx *tOG*hwdT GT hL/M
} UmnE@H"t$\ } e6X[vc|Y} //负责部分文件的抓取 6J~12TU, **FileSplitterFetch.java o[ENp'r */ O<)y-nx;X package NetFox; LIU}a5 ki0V8]HP GBFw+v/|4 import java.io.*; &AuF]VT import java.net.*; S|rgCh!h Dlo xrdOY& 6ZgU"!|r public class FileSplitterFetch extends Thread { cr?7O;, =z?%;4'| &bqT/H18 String sURL; //File URL 8;y&Pb~) long nStartPos; //File Snippet Start Position rV({4cIe9R long nEndPos; //File Snippet End Position vB37M@wm int nThreadID; //Thread's ID G1t\Q-|l0 boolean bDownOver = false; //Downing is over mDGn:oRj boolean bStop = false; //Stop identical @cRZk`|1n FileAccessI fileAccessI = null; //File Access interface P X;Ed*y /:<IIqO. ~'5 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Uw-p758dD { \ 6EKgC1 this.sURL = sURL; LAx4Xp/ this.nStartPos = nStart; @`-[;?> this.nEndPos = nEnd; 6OiSK@<Hk nThreadID = id; G Ejd7s]C fileAccessI = new FileAccessI(sName,nStartPos);//定位 V Km!Ri$ } /!}'t ]Ni$.@Hu$ 5!C_X5M public void run()
O=) { H$ftGwS8 while(nStartPos < nEndPos && !bStop) ~`>e5OgOJ { /2{5; .yT8NTu~0j :[@k<8<] try{ z3t~}aL URL url = new URL(sURL); o ]Jv;Iy@? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); s{ V*1$e~ httpConnection.setRequestProperty("User-Agent","NetFox"); r4x3$M c String sProperty = "bytes="+nStartPos+"-"; \^1+U JU httpConnection.setRequestProperty("RANGE",sProperty); &`Y!;@K9W# Utility.log(sProperty); = 5D nR PqNFyQkl H7+Xs% InputStream input = httpConnection.getInputStream(); E^_wI> //logResponseHead(httpConnection); iFSJL,QZ3 q;5i4| B:"THN^ byte[] b = new byte[1024]; DlMe5=n-u int nRead; dk
QaM@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @4%L36k { ULc`~] nStartPos += fileAccessI.write(b,0,nRead); J68j=`Y //if(nThreadID == 1) I"AYWo? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ub0/r$]DK } $(s\{(Wn _$<Gyz* U%7i=Z{^Ks Utility.log("Thread " + nThreadID + " is over!"); 5`~mmAUk;` bDownOver = true; 3QI?[R. //nPos = fileAccessI.write (b,0,nRead); %xwIt~Y } )Fd
HV;K catch(Exception e){e.printStackTrace ();} rQ4*k'lA: } 4fh^[\ } 0s#vwK13 }MR1^ 7;.xc{ //打印回应的头信息 -Z4{;I[Q@ public void logResponseHead(HttpURLConnection con) +u@aJ_^ { X.ONa_ for(int i=1;;i++) 2c<&eX8" { $=sXAK9 String header=con.getHeaderFieldKey(i); IUGz =%[ if(header!=null) A>VI{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ?6Cz[5\ Utility.log(header+" : "+con.getHeaderField(header)); rdJm{< else |5I'CNi\ break; xy+QbDT } "O+5R(XT } nmlPX7!{$ E{=2\Wkcp _2fkb=2@ public void splitterStop() 0,*%vG?Q { qP!eJ6[Nh" bStop = true; P ]N
[y } Jxf~&!zR z^o 1GY ;vhyhP.oM } A6<C-1
N}j 5q{h 2).) L+B?~_* /* u{&B^s)k. **FileAccess.java =9L$L|W *//文件访问(定位,写) {-9jm%N package NetFox; ^\ ?O4,L import java.io.*; +&tgJ07A Q8p&Ki;i (-7ZI"Ku public class FileAccessI implements Serializable{ +i `*lBup$ (VvKGh //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 '"pd RandomAccessFile oSavedFile; 3[p_!eoW long nPos; ?wMHS4 K*K1(_x= 5_K5?N public FileAccessI() throws IOException F}Mhs17!| { G
DSfT{kK\ this("",0); ,F+B Wot4 } N;F)jO
xsl iMF<5fLH& 'f8(#n=6qP public FileAccessI(String sName,long nPos) throws IOException -0o[f53}p { I9$c F)zk oSavedFile = new RandomAccessFile(sName,"rw"); XXmE+aI this.nPos = nPos; )j6eE+gF oSavedFile.seek(nPos); oC*ees
g_ } L^kp8o^$ +5<k-0v Kj=gm . public synchronized int write(byte[] b,int nStart,int nLen) WV;=@v { P#kGX(G9! int n = -1; D| I Ec? try{ :(3|HTz oSavedFile.write(b,nStart,nLen); NX* O_/ n = nLen; ir>]r<Zl } 5FvOznK^e catch(IOException e) <dA8
'7^ { u%|zc= e.printStackTrace (); |YJCWFbs8 } Qx|H1_6 `znB7VQ0 q)u2Y] return n; tury<* } 3K/Df# ske@uzAz -P=g3Q i } p?(L'q"WK {B$2"q/~ :@
uIxa$[ /* Ftb%{[0}u3 **SiteInfoBean.java O/AE}] */ Df07y<>7Q package NetFox; 4FeEGySow KHiFJ_3 \jW)Xy public class SiteInfoBean { `T*U]/zQ YZ#V#[j'^ e]+OO
g& private String sSiteURL; //Site's URL _68BP)nz>. private String sFilePath; //Saved File's Path noVa=aU^ private String sFileName; //Saved File's Name U SOKDDm private int nSplitter; //Count of Splited Downloading File yFIy`9R 6y+b5-{' wjU.W5IR public SiteInfoBean()
~m=EM; {//nSplitter的缺省值为5 I\P Bu$Ww //default value of nSplitter is 5 2F_
R/{D this("","","",5); ?v]-^X=& } rp!
LP#* E,G<_40 ;#?M)o:q public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ucYkxi`x { IxSV? k
sSiteURL= sURL; >X}{BDMb. sFilePath = sPath; V%L/8Q~ sFileName = sName; g1m-+a this.nSplitter = nSpiltter; @_'OyRd8 Go\VfLL w
Ayx^Wp*s } *3{J#Q6fk3 ~GB=Nz ^i%A7pg public String getSSiteURL() ~2}Pl) { @Z(rgF{{ return sSiteURL; ~&G4)AM } $`Nd?\$ '8`T|2 tn<6:@T
public void setSSiteURL(String value) M8W# io { j\)H sSiteURL = value; W*T{,M@Y } 3><u*0qe%I 9w~cvlv[ I=dGq;Jaz public String getSFilePath() ?qHF}k| { e$l6gY return sFilePath; LVtu*k } 9Ld9N;rWm# <bmLy_": hq_~^/v\ public void setSFilePath(String value) y%(X+E"n* { Ub)I66 sFilePath = value; z_SagU,\ } <+E%E4 -e`;bX_N) ]
pPz@@xx public String getSFileName() 0Oxz3r%}r { hb^!LtF#Y return sFileName; D!FaE N } ,"
R>}kPli KsdG(.I+ek a8uYs DS public void setSFileName(String value) 1p\Ak { qc8Ta" sFileName = value; 7[o {9Yp& } "n?<2
wso (O5)wej `.BR=['O public int getNSplitter() UmP'L! { T!^Mvat return nSplitter; }=GM?,7b } &TT":FPR " ~$$ 1kFjas`g public void setNSplitter(int nCount) [8]m8=n { X ,
ZeD nSplitter = nCount; xPQL?. } jXIEp01 } p5*lEz|$ J/Q|uRpmqr j7/(sf /* l]5% **Utility.java |-kEGLH[*V */ jxY-u+B package NetFox;
$Ub}p[L U6{dI@|B 4;<DJ.XlN= public class Utility { h5onRa*7 0=[0|`x Y6eEGo"K.+ public Utility() S<oQ}+4[~ { iHz[Zw^.s @>O&Cpt v]bAWo } f=ib9WbR# -9G]x{> //线程睡眠 &5q{viI public static void sleep(int nSecond) p.Y$A
if. { 7%CIt?Z% try{ `"Dy%&U Thread.sleep(nSecond); gMZ&,n4 } u%opY<h catch(Exception e) L>nO:`>h { #v8Cy|I e.printStackTrace (); 79tJV } BX$hAQ(6Q } `Cj,HI_/* ryEvmWYu //日志 "6V_/u5M;= public static void log(String sMsg) hEOJb
@:R { $FCw$ +w System.err.println(sMsg); ^Kw(&v } L?f qcW{ 1URsHV!xcM bOXh|u_3i public static void log(int sMsg) 6Bdyf(t { b\L)m ( System.err.println(sMsg); %HEmi; } cdsQ3o } 9p<:LZd~ +{ab1))/ #$u ZDQY_ /* n4*'B* **TestMethod.java -A@U0=o */ [+DNM
2A package NetFox;
rk|a'& CjZ6NAHc '#f?#( public class TestMethod { ~~dfpW _" JS2!)aqc {G.{ad public TestMethod() 6QptKXu7 { ///xx/weblogic60b2_win.exe y Hw!#gWM try{ bV7QVu8 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); s=j O;K$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `w=!o.1 SiteFileFetch fileFetch = new SiteFileFetch(bean); riEqW}{ fileFetch.start(); )`RZkCe } fiqj;GW catch(Exception e){e.printStackTrace ();} ^z?=?%{ ]}_,U!`8 "0Y&~q[= } L4mTs-M. hGKdGu`0 .Bijc G public static void main(String[] args) #ZwY?T
x { (QhAGk&lu new TestMethod(); |Kn^w4mN } cFxSDTR } RA~_]Hk 点击下载更多相关资料
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