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/* aj51%wKMb: **SiteFileFetch.java >~_y\ */ 9G` 2t~% package NetFox; h']RP import java.io.*; YN_#x import java.net.*; RQWVjF# t }7hD "B*a|
'n! public class SiteFileFetch extends Thread { ,w,>pO'[ #R4Mv(BG s+(%N8B SiteInfoBean siteInfoBean = null; //文件信息Bean 7f8%WD) long[] nStartPos; //开始位置 H[@uE*W long[] nEndPos; //结束位置 TyD*m$`y FileSplitterFetch[] fileSplitterFetch; //子线程对象 \)eHf
7H
long nFileLength; //文件长度 ~0w7E0DE[ boolean bFirst = true; //是否第一次取文件 J5)e 7 boolean bStop = false; //停止标志 91r9RG> File tmpFile; //文件下载的临时信息 VQU [5C DataOutputStream output; //输出到文件的输出流 C6,GgDH` p18-yt;
1 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) eW"i'\`0 public SiteFileFetch(SiteInfoBean bean) throws IOException {/uBZ( { W:O<9ZbQ_ siteInfoBean = bean; ~:b bV6YO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F7^8Ej9*a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); e
&^BPzg if(tmpFile.exists ()) t1b$,jHmKl { YN?@ S bFirst = false; L!V`Sb read_nPos(); 3H%R`ha } A^q= :ofQ else .{`+bT^b<2 { qGuz`&i nStartPos = new long[bean.getNSplitter()]; ,pa,:k? nEndPos = new long[bean.getNSplitter()]; 0&=2+=[c } 0*L|rJf _s><>LH~ D@uw[;Xb5 `Gx"3ZUn } j|FGb: Fkuq'C<|Y D;Fvd: public void run() >9a%"<(2# { oo)P(_"u //获得文件长度 -}%'I]R= //分割文件 R"6Gm67 t //实例FileSplitterFetch leiED' //启动FileSplitterFetch线程 >s1FTB-$W //等待子线程返回 &JAQ:([: try{ bv;&oc:r if(bFirst) 6#T?g7\pyR { |w- tkkS nFileLength = getFileSize(); E"!9WF(2t5 if(nFileLength == -1) ?=jmyDXH! { b5Rjn1@ System.err.println("File Length is not known!"); GC66n1- X } \hdR&f5q else if(nFileLength == -2) GsqR8n= { vVc:[i System.err.println("File is not access!"); Z{+h~?63 } [#V"a:8m} else _55T { ,r{*o6 for(int i=0;i<nStartPos.length;i++) 8xj4N%PA { B3O^(M5W nStartPos = (long)(i*(nFileLength/nStartPos.length)); Bjml% } 8H./@~_ = for(int i=0;i<nEndPos.length-1;i++) Ox?LVRvxI { E87/B%R nEndPos = nStartPos[i+1]; cx|[P6d } !s.G$ JS< nEndPos[nEndPos.length-1] = nFileLength; w4'(Y,(` } Yk(OVl T } Xx:0Nt] >r{3t{ d%1S6eYa' //启动子线程 ?Ee?Ol?i2 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _S8]W
!c for(int i=0;i<nStartPos.length;i++) Il2DZ5-
) { , Ot3N\%yn fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H`-%)c= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), BT
98WR"\ nStartPos,nEndPos,i); t"2WJ-1k} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bVtboHlY fileSplitterFetch.start(); l6xC'c,jg } =ADAMP // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I
m_yY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); m{mK;D
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +
h`:qB nEndPos = " + nFileLength); yZxgUF&` // fileSplitterFetch[nPos.length-1].start(); wz.Il-sm 4I"QT(; EYGJDv(S //等待子线程结束 TnL%_!V! //int count = 0; fB1JU1 //是否结束while循环 miuJ!Kr' boolean breakWhile = false; ]j*o&6cQf AbZ:AJ(
X^_,`H@ while(!bStop) eWqJ 2Tt { bsM`C]h& write_nPos(); Br]VCp Utility.sleep(500); LAwX9q` breakWhile = true; BRQ9kK20 PHfGl aC]~ for(int i=0;i<nStartPos.length;i++) ?P<&8eY { rMe`HM@ if(!fileSplitterFetch.bDownOver) (S5'iksx { }w8h^(+B breakWhile = false; }O2hhh_ break; |1g2\5Re } g.DgJX&i } %!(6vm>8 if(breakWhile) U~Ni2|}\C9 break; L$ ]D&f8: uAzVa!) t1Hd-]28V //count++; J9/9k //if(count>4) s]L`&fY]O // siteStop(); ?U|~h1
} Se"\PxBR IZJV6clM rM [Ps=5 System.err.println("文件下载结束!"); *Ei~2O} } |YZ`CN<
catch(Exception e){e.printStackTrace ();} F!pUfF,& } {zbH.V[ i`2Q;Az_P6 ?aSL'GI //获得文件长度 Lrq+0dI 65 public long getFileSize() VxjHB?) { &9o @x]) @ int nFileLength = -1; 8C,?Ai<ro try{ "kP.Kx! URL url = new URL(siteInfoBean.getSSiteURL()); L2{to f HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @#VxjXW^ httpConnection.setRequestProperty("User-Agent","NetFox"); M*t@Q|$: E'XFn' 2(\>PN- int responseCode=httpConnection.getResponseCode(); &JfyXM[] if(responseCode>=400) mWmDH74 { Pl1:d{"d processErrorCode(responseCode); `E!t,*(*E return -2; //-2 represent access is error r}f-.Fo } 5 Nl>4d` ,:>>04O g'pE z String sHeader; =C`v+NPM)| rZJp>Q)s G9E?
for(int i=1;;i++) E'MMhlo { N_C\L2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \hi{r@k>} //Utility.log(in.readLine()); v{JCEb&wN sHeader=httpConnection.getHeaderFieldKey(i); .]r[0U if(sHeader!=null) _
esFx { /^#}
\<; if(sHeader.equals("Content-Length")) QR4v6*VpD { CXUNdB nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >#!n"i; break; E8%O+x} } _$cQAH0 E } 1-w1k^e else #7Qn\C2 break; ]t(g7lc}U } /&kZ)XOi } (6 0,0|s catch(IOException e){e.printStackTrace ();} ? _HTOOa catch(Exception e){e.printStackTrace ();} !o*oT}6n j:<E=[Kl 4+v~{ Utility.log(nFileLength); %#7M~RB[ 1ed#nB% j1/J9F' return nFileLength; 3kKXzIh } -MB,]m x!I7vs~~zW |2n2 //保存下载信息(文件指针位置) >{m>&u;Cc private void write_nPos() {tWfLfzU { /eIwv31 try{ l l&iMj] output = new DataOutputStream(new FileOutputStream(tmpFile)); WU=Os8gR output.writeInt(nStartPos.length); h!d#=.R for(int i=0;i<nStartPos.length;i++) _e`b^_ { 0CTI=<; // output.writeLong(nPos); VJ;'$SYx output.writeLong(fileSplitterFetch.nStartPos); u=ENf1{ $> output.writeLong(fileSplitterFetch.nEndPos); o
&Nr5S } ty-4yK# output.close(); 4{fi=BA } ,
/ 4}CM catch(IOException e){e.printStackTrace ();} s[xdID^3. catch(Exception e){e.printStackTrace ();} Bb-x1{t } ,{E'k+ tM@TT@.t~ pdtK3Pf //读取保存的下载信息(文件指针位置) N4H nW0 private void read_nPos() q=96Ci _a { Zqx5I~ try{ w7dG=a& DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); V]vk9M2q[l int nCount = input.readInt(); `^_.E:f nStartPos = new long[nCount]; A;2?!i#f nEndPos = new long[nCount]; :=~([oSNW" for(int i=0;i<nStartPos.length;i++) r-'j#|^tz { Cs*u{O nStartPos = input.readLong(); {BKI8vy nEndPos = input.readLong(); :j9;P7&"? } qPzgGbmD9 input.close(); *B3` #t } \J1Jn~ catch(IOException e){e.printStackTrace ();} [8)Zhw$ catch(Exception e){e.printStackTrace ();} DM>j@(uWF } Xq J@NgsY C/]0jAAE7 ["@K~my~D* private void processErrorCode(int nErrorCode) lHP[WO
{ "G4{;!0C System.err.println("Error Code : " + nErrorCode); 1h)I&T"kZ } Gc
SX5c 4|Z3;;%+ C:P, q6 //停止文件下载 CZbp}:| public void siteStop() :L\@+}{(c { bLf }U9 bStop = true; D $ `yxc for(int i=0;i<nStartPos.length;i++) M4')gG; fileSplitterFetch.splitterStop(); !JrVh$K qU=$ 0M F;MFw2G } M+nz~,![ } >TtkG|/U-T //负责部分文件的抓取 wt)tLMEv **FileSplitterFetch.java m\jp$ */ nq_sbli package NetFox; \UK 9 L
TO1LAac Lww0 LH
> import java.io.*; 6'*?zZrz import java.net.*; k6*2=
xK~ Ng;E]2" tK]r>?Y\ public class FileSplitterFetch extends Thread { WH'[~O A\z[/3& RK T.&^1q WWA String sURL; //File URL vH7"tz&RIp long nStartPos; //File Snippet Start Position #M8"b]oh6 long nEndPos; //File Snippet End Position JO1c9NyKr int nThreadID; //Thread's ID xT=|Uc0 boolean bDownOver = false; //Downing is over w3yI;P boolean bStop = false; //Stop identical [g<6i.<I FileAccessI fileAccessI = null; //File Access interface 0~^opNR 8HTV"60hTs oYqlN6n,=6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^#"!uCq]gM { oOJN?97!k this.sURL = sURL; yNI}=Z this.nStartPos = nStart; rY($+O@a< this.nEndPos = nEnd; x~Pv nThreadID = id; ^WM)UZEBC fileAccessI = new FileAccessI(sName,nStartPos);//定位 h4.ZR={E } ?M\3n5; }{9E~"_[ LI(Wu6*Y public void run() Y+WOU._46I { -bKli<C while(nStartPos < nEndPos && !bStop) 59ro-nA9v { L6U[H#3( xt40hZ$ Oja)J-QXb try{ mDj:w#q URL url = new URL(sURL); dr:)+R HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V&NOp httpConnection.setRequestProperty("User-Agent","NetFox"); ^$yr-p%- String sProperty = "bytes="+nStartPos+"-"; G?8,&jP~T httpConnection.setRequestProperty("RANGE",sProperty); CXJ0N Utility.log(sProperty); })ss. 6C) G +h[$\_y InputStream input = httpConnection.getInputStream(); 5H?`a7q N //logResponseHead(httpConnection); @\[&_DZ gxL5%:@ HiVF<tN byte[] b = new byte[1024]; K3 "co1]u int nRead; n_?<q{GW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Po=)jkW { #CVD:p nStartPos += fileAccessI.write(b,0,nRead); uKtrG,/ p //if(nThreadID == 1) 875V{fvPBU // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ZYkeW } f@>27&'WV 8[}MXMRdb ;xwa,1] Utility.log("Thread " + nThreadID + " is over!"); D<Ads bDownOver = true; ^9"|tWf6O //nPos = fileAccessI.write (b,0,nRead); o-7>^wV%BD } Z.VVY\ catch(Exception e){e.printStackTrace ();} J;'?(xO3\ }
sx(yG9 } %VSST?aUvX G4AX8@;U O/l|\n //打印回应的头信息 3P'.)=} public void logResponseHead(HttpURLConnection con) jskATA
/ { J%D'Xlb for(int i=1;;i++) d) G7U$z~ { Px'% 5TKN String header=con.getHeaderFieldKey(i); E%jOJA if(header!=null) tse(iX/D //responseHeaders.put(header,httpConnection.getHeaderField(header)); aI+:rk^ Utility.log(header+" : "+con.getHeaderField(header)); 8pt;'' else Y@RPQPmIQ break; +Bc/@.Q' } =s1"<hH}O) } hRGK W c9iCH~ #).om*Xh public void splitterStop() /3rt]h" { 3}n=o d= bStop = true; Lj({
T'f( } H6rWb6i a*74FVZo.; `h :&H,N } PS(9?rX#+ :uhvDYp(- In=3#u
,M /* ZXHG2@E) **FileAccess.java j:$2,?|5 *//文件访问(定位,写) fd*=`+P package NetFox; -Qqb/y import java.io.*; op&,& Y( D d7`c t`H^!
b public class FileAccessI implements Serializable{ '_@=9 \< 5K{(V^88F //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 (/Z~0hA[Q RandomAccessFile oSavedFile; @T]gwJ long nPos; T(7
8{A> >x&$lT{OY /]<0`nI. public FileAccessI() throws IOException VLu_SXlo* { 9v<BO$
,a this("",0); BeaX 0#\ } ~>xn9vb= 7Dom[f C6CX{IA] public FileAccessI(String sName,long nPos) throws IOException @QVAsNW:O { IS]0 3_uQ oSavedFile = new RandomAccessFile(sName,"rw"); >Mrz$
z{x this.nPos = nPos; $*8c0.{U oSavedFile.seek(nPos); ;^O^&< } 09%q/-$ dg/7?gV (!DH'2I[ public synchronized int write(byte[] b,int nStart,int nLen) -:cS}I { fC]+C(*d int n = -1; @MAk/mb& try{ (Qq! u oSavedFile.write(b,nStart,nLen); oQWS$\Rr. n = nLen;
`k_5Pz\ } DV*8Mkzg catch(IOException e) ?2_u/x { 7:{4'Wr@6| e.printStackTrace (); :14O=C } p5c'gziR m!N_TOl-^ H,KU!1p return n; 9"_qa q } OQW#BBet@ 1\kOjF)l J
A4'e@ } dq"b_pr; X
f!Bsp#\g RZm5[n /* 0MrtJNF]_O **SiteInfoBean.java dSk\J[D */ r"Pj,}$A package NetFox; % 49@ _6^ vxlF qJ#?=ITE public class SiteInfoBean { c<DsCzX +lO
Y
IQ \qV5mD]"M private String sSiteURL; //Site's URL >xJt&jW- private String sFilePath; //Saved File's Path {B?%r[nW private String sFileName; //Saved File's Name H :d{Sru private int nSplitter; //Count of Splited Downloading File `
n@[=l~ ' OdZ[AN mL18FR N public SiteInfoBean() 7<|1 xOT {//nSplitter的缺省值为5 A$Es(<'9g //default value of nSplitter is 5 V4/P this("","","",5); v?fB:[dG
} =lr*zeHLC hLYSYMUb Uu>YE0/) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) f==o
{ [$8*(d"F' sSiteURL= sURL; Q:>;d-D|1 sFilePath = sPath; XuoI19V[ sFileName = sName; `lN1u'(: this.nSplitter = nSpiltter; 8Tt2T}
Y dZ`nv[]k~ u2JkPh&!rq } pb_mW;JVu q|=tt(}G %zb7M%dC6` public String getSSiteURL() &=X1kQG { QbxjfW"/+ return sSiteURL; (@uQ>dR: } g0cCw2S UyD=x(li H,:Cg:E/^ public void setSSiteURL(String value) b;9v.MZ4>g { *G'zES0x sSiteURL = value; @T?:[nPf&F } R4E0avt .<rL2`C[c kOFEH!9& public String getSFilePath() _+z@Qn?#6h { $J=9$.4" return sFilePath; }Jh!B| } <*2.B~ ehOF@IA_ D3;^!ln]D public void setSFilePath(String value) Ibd7[A\ { W{1=O)w sFilePath = value; Fl(+c0|kT } wb"Jj &AUL]:<s s:jr/ j! public String getSFileName() !i.`m-J* { 7bQ#M )} return sFileName; #9#N+ } j
7a;g7. N#Qby4w > , $78\B^ public void setSFileName(String value) ^^3
>R` { i.0}qS? sFileName = value; i*9eU*i|H } o Ep\po1 =QRLKo#_ H]}Iw5Z public int getNSplitter() 8
6?D { )
;-AT^ return nSplitter; xyBe*,u } qNC.|R csH1X/3ha\ F 3,hx public void setNSplitter(int nCount) Ndx.SOj { M\e%GJ0 nSplitter = nCount; .F'Fk=N } O`OntYwa> } u2 -%~Rlo WTY{sq\'
o 1,,o_e\nn3 /* o+/x8:
**Utility.java TcO@q ]+S */ k{y@&QNj package NetFox; .;/@k%> Pt";f n#,AZ& public class Utility { Zhz.8W 7! <cU Z-Bw?_e_K public Utility() [AE]0cO@ { r}D`15IHJ 1i2jYDB" jW?.>( } t#6gjfIi N''9Bt+: //线程睡眠 G)5%f\& public static void sleep(int nSecond) k+JDbJ@ { Gob1V try{ amlE5GK; Thread.sleep(nSecond); WASs'Gx } +)L
'qbCSM catch(Exception e) S[X bb=n { S-.!BQ@RMZ e.printStackTrace (); FyZw='D } s-o0N{b?#' } }"Hf/{E$_" pYceMZ$ //日志 bYgrKz@uK public static void log(String sMsg) 'JKFEUzM { #*}4= System.err.println(sMsg); l4L&hY^ } w<-CKM3qe BU<A+Pe> wKXKc\r public static void log(int sMsg) KosAc'/ M { vT\`0di~ System.err.println(sMsg); ;w}ZI<ou } K}&|lCsb }
\AoM'+ iNd8M V }yx'U 3 /* ]{.rx), **TestMethod.java TP'EdzAT */ cDm_QYQ package NetFox; hgfCM _Bb/~^ Y.[^3 public class TestMethod { $-jj%x\} <M7@JgC & EAj2uV public TestMethod()
^qS[2Dy { ///xx/weblogic60b2_win.exe T$0//7$') try{ ,]y)Dy SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 0rsdDME[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); FL/@e$AK SiteFileFetch fileFetch = new SiteFileFetch(bean); "9&6bBa fileFetch.start(); zRL[.O9 } ! Hdg
$, catch(Exception e){e.printStackTrace ();} H2E!A2\m K$R1x1lc2 #wk'&XsC#z } Z+(V'e; "_}Hzpy5k tm#T8iF public static void main(String[] args) TL1pv l { lRZt))3 new TestMethod(); 4g$mz:vo } 4WzB=C(f } )+u|qT3% 点击下载更多相关资料
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