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/* Adm`s . **SiteFileFetch.java |,crQ'N' */ 7[PXZT package NetFox; rL/+`H import java.io.*; 9:WKG'E8a import java.net.*; Ig2VJ s; [; bLlS, 12E"6E) public class SiteFileFetch extends Thread { }K\_N]#6n u-$AFSt +iR;D$w SiteInfoBean siteInfoBean = null; //文件信息Bean aJts long[] nStartPos; //开始位置 >#Yq&@G long[] nEndPos; //结束位置 Bf.RYLsh6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 xYq8\9Qb long nFileLength; //文件长度 qYs6PLC boolean bFirst = true; //是否第一次取文件 1zffPC8jl boolean bStop = false; //停止标志 sQ$FtKm6 File tmpFile; //文件下载的临时信息 :1I,:L DataOutputStream output; //输出到文件的输出流 PC5FfX 6>Fw,$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6 9Cxh public SiteFileFetch(SiteInfoBean bean) throws IOException P#C`/%$S { *Bj G3Jc5 siteInfoBean = bean; B^Q#@[T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6lGL.m'Ra tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (`N/1}vk if(tmpFile.exists ())
~a}pYLxl { 4KKNw9L) bFirst = false; 3 ren1 read_nPos(); )_ y{^kn3^ } V l%k: else aap:~F{]X { ?bEYvHAzg nStartPos = new long[bean.getNSplitter()]; L r,$98Dy nEndPos = new long[bean.getNSplitter()]; , /pE*Yk } k dqH36&< _gHJ4(?w f{J7a1 `_ "(5}=T@, } >;Bhl|r~z d$ /o\G 0WFZx
Ad" public void run() [g{}0[ew { "v06Fj>q //获得文件长度 )]}*oO //分割文件 B sAglem //实例FileSplitterFetch @UA>6F //启动FileSplitterFetch线程 :5(TOF //等待子线程返回 LLMkv!%D try{ Y+N87C< if(bFirst) sr\MQ?\fB { )c*~Y=f nFileLength = getFileSize(); z t1Q_; if(nFileLength == -1) W$&Q.Z { m-:k]9I System.err.println("File Length is not known!"); Oj2[(7mO/ } (8{Z@ else if(nFileLength == -2) (]JJ?aAF { %+.]>''a System.err.println("File is not access!"); OCd[P1Y] } Sa Nx;xgi else @1pdyKK { B3D4fYQ for(int i=0;i<nStartPos.length;i++) gm8H)y, { ^a]:GPc nStartPos = (long)(i*(nFileLength/nStartPos.length)); Au
{`oxD } X!@Gv:TD for(int i=0;i<nEndPos.length-1;i++) q&+GpR { 6*e:ey U nEndPos = nStartPos[i+1]; 7J_H Ox# } k$hWR;U nEndPos[nEndPos.length-1] = nFileLength; m=R4A4Y7 } U>>J_2 } o)$sZ{` =" 67e1Y@Xu ]Kf HuYjM //启动子线程 DN!EsQ6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ?vhW`LXNB for(int i=0;i<nStartPos.length;i++) 5rc<ibGh { {BJxRH"&6* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ELm# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), hZpFI?lqc\ nStartPos,nEndPos,i); Bg3^BOT Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @=9QV3D fileSplitterFetch.start(); Nb$ )YMbA } `1P
& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !vsUL- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0ul2rZc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Pvtf_Qo^ nEndPos = " + nFileLength); '
ft
| // fileSplitterFetch[nPos.length-1].start(); >Nov9<p R(:q^? )a.U|[:y[+ //等待子线程结束 `a J[
!O //int count = 0; 2@ad! h //是否结束while循环 ,+JAwII>O boolean breakWhile = false; ;c'jBi5W F8pLA@7[ | o?@Eh while(!bStop) /5o~$S { /q> ""> write_nPos(); @M(vaJB8u Utility.sleep(500); hGpaHY>My breakWhile = true; v/kYyz eVy,7go h }NUP[% for(int i=0;i<nStartPos.length;i++) 8T%z{ A1T { old}}>_ if(!fileSplitterFetch.bDownOver) <mpkkCl, { ;xb:{? breakWhile = false; j3FDGDrg break; k`N)-`O7 } ON$u581 y } AttDD{Ta if(breakWhile) Q%85,L^ U break; K(_nfE{ <5nz:B/ ub-ZrC' //count++; <AB]FBo( //if(count>4) {6n B83BB // siteStop(); O*30|[ } N~a?0x {AB0 PM;- l{;vD=D System.err.println("文件下载结束!"); ua2SW(C@ } n\d-^ml catch(Exception e){e.printStackTrace ();} YpAjZQZ, } s]}P
jh8 fHM<6i<C D@!#79:) //获得文件长度 0"ZRJl<)[I public long getFileSize() W#ev { 2?HLEiI1 int nFileLength = -1; .i&]VGv try{ "6.kZ$`% URL url = new URL(siteInfoBean.getSSiteURL()); dfk=%lZYd9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ' (ql7 httpConnection.setRequestProperty("User-Agent","NetFox"); q),yY]5 EKgTRRW HogT#BMs int responseCode=httpConnection.getResponseCode(); C EAwQH if(responseCode>=400) M[SWMVN{ { 0kmZO"K#e processErrorCode(responseCode); 'sJYt^ return -2; //-2 represent access is error "/wZt c } aQcJjF5x G!wFG-Y} X+iUT String sHeader; b^rPw@ z`'{l{ XO219 for(int i=1;;i++) YX-G>.Pc { 2b2/jzO}J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); hbn2(e;FZ //Utility.log(in.readLine()); IRD?.K]* sHeader=httpConnection.getHeaderFieldKey(i); g&&5F>mF if(sHeader!=null) {8'I+- { iFpJ/L if(sHeader.equals("Content-Length")) )p 2kx { IE,xiV nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %I?uO(
@ break; `Fnt#F} } u|i.6:/= } r6JdF!\d else Q/L:0ovR break;
/djr_T } j#zUO&Q@ } dy`K5lC@ catch(IOException e){e.printStackTrace ();} fpu^ catch(Exception e){e.printStackTrace ();} K8f;AK r+ k5Bk' i#=s_v8 Utility.log(nFileLength); O6 bB CF; |cUTP!iy ^pIT,|myY7 return nFileLength; 7ZqC1 } \= =rdW- +<7`Gn(n3 a;8q7nC //保存下载信息(文件指针位置) cl/}PmYIZ private void write_nPos() r<
sx On { |aIY try{ `2()Vf output = new DataOutputStream(new FileOutputStream(tmpFile)); 6O>NDTd% output.writeInt(nStartPos.length); -lAX-W0 for(int i=0;i<nStartPos.length;i++) ET.c8K1f { \%g#
__\ // output.writeLong(nPos); t&*X~(Yb! output.writeLong(fileSplitterFetch.nStartPos); -YPUrU[) output.writeLong(fileSplitterFetch.nEndPos); wak_^8x } rzsAnLxo output.close(); *#\da]"{ } rI23e[ catch(IOException e){e.printStackTrace ();} {d|e@`"T catch(Exception e){e.printStackTrace ();} W!MO}0s } Y`.FSs B}Qpqa=_c ezS@LFaA //读取保存的下载信息(文件指针位置) f_I6g uDPz private void read_nPos() xJlf}LEyF { * `1W}) try{ ~|QhWgq DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Wo+fMn(O int nCount = input.readInt(); ER-X1fD nStartPos = new long[nCount]; 6R1}fdHvP nEndPos = new long[nCount]; 1CXO=Q for(int i=0;i<nStartPos.length;i++) gE;r;#Jt4 { mO%F {' nStartPos = input.readLong(); qy|[V nEndPos = input.readLong(); z3>ldT } MROe"Xj input.close(); "&lQ5]N.% } H!PMb{e catch(IOException e){e.printStackTrace ();} ]jQj/`v1 catch(Exception e){e.printStackTrace ();} wA$ JDf)Vg } jJc:%h$|2 -q'G]} X?kw=x{2P private void processErrorCode(int nErrorCode) F5s Pd { X2\1OWR0 System.err.println("Error Code : " + nErrorCode); AYb-BaIc } a/p}
?!\ Q#M@!& Pr|BhX //停止文件下载 ,E
] vM& public void siteStop() O1xK\ogv { #$-{hg{ bStop = true; *5T^wZpj) for(int i=0;i<nStartPos.length;i++) ^E-BB 6D fileSplitterFetch.splitterStop(); 7\.{O$Q x)GpNkx: GP<PU } CvkZ<i){ } ;xqN#mqq //负责部分文件的抓取 N5K\h}'% **FileSplitterFetch.java Z8 eB5!$ */ ]40@yrc package NetFox; ,r_%p<lOFu ?/3'j(Gk JO[7_*s import java.io.*; f
N_8HP6& import java.net.*; n[+$a)$8 :}0>IPW-V [8%R*} public class FileSplitterFetch extends Thread { {wJ8%
;Z7 C"7-lz (Y!{ UNq5 String sURL; //File URL ngLpiU0H& long nStartPos; //File Snippet Start Position 2e_ m>I long nEndPos; //File Snippet End Position 2-$O$&s. int nThreadID; //Thread's ID X^o0t^
boolean bDownOver = false; //Downing is over y\?NB:=% boolean bStop = false; //Stop identical z*,J0)<Q FileAccessI fileAccessI = null; //File Access interface 0^('hS& 9Ib#A `En>o~ L; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y?Cq{( { e|1.-P@ this.sURL = sURL; Ah:d2*SR4 this.nStartPos = nStart; o$q})! this.nEndPos = nEnd; Gov]^?^D- nThreadID = id; M4}b lh# fileAccessI = new FileAccessI(sName,nStartPos);//定位 [Fk|%;B/~ } 2]:Z7Ji ~8 S2BV3@ eXA@J[-M: public void run() 4ux^K:z { )`5=6i while(nStartPos < nEndPos && !bStop) &iI5^b-P {
,hSTR) SX1w5+p$C WJU[+|J try{ JavSR1_ URL url = new URL(sURL); N!lQ;o' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vw2yOLRX httpConnection.setRequestProperty("User-Agent","NetFox"); Q@(tyW+8U@ String sProperty = "bytes="+nStartPos+"-"; 2%_UOEayU httpConnection.setRequestProperty("RANGE",sProperty); ,z5B"o{Et Utility.log(sProperty); L)"E _ FE'F@aS\ 1| XC$0 InputStream input = httpConnection.getInputStream(); b}HwvS: //logResponseHead(httpConnection); CaB@,L S; Fj9\2)I wX+KW0|> byte[] b = new byte[1024]; jJqq:.XqB8 int nRead; hMnJH_siY while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) wl5+VC*l0 { wA< Fw
) nStartPos += fileAccessI.write(b,0,nRead); BTnrgs#[ //if(nThreadID == 1) '*=kt // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3)*Twqt } 3[Z7bhpV \Z8:^ct.P _Gtq]`y Utility.log("Thread " + nThreadID + " is over!"); HDQH7Bs bDownOver = true; 8i~n;AhDs //nPos = fileAccessI.write (b,0,nRead); vYNu=vnM } \Xpq=2` catch(Exception e){e.printStackTrace ();} @)x8< } $:IEp V{ } f#3!Q!C^ m{?uR.O U2CCjAgRs //打印回应的头信息 St|B9V?eEB public void logResponseHead(HttpURLConnection con) qr'P0+|~5 { v=J[p;H^H for(int i=1;;i++) eh /QFm
4 { M/evZ?uis String header=con.getHeaderFieldKey(i); Oi4y~C_Xd if(header!=null) e)#f`wM //responseHeaders.put(header,httpConnection.getHeaderField(header)); NR.YeKsBq Utility.log(header+" : "+con.getHeaderField(header)); q[5& else f9a_:]F break; ><w= } cz;gz4d8 } I?X!v6 F.$NYr/|y }%Vx2Q public void splitterStop() RxUzJ { <2ymfL-q bStop = true; "yf#sEabV } d: LP8 :<PwG]LO [DSD[[
z[ } S*' 7q@>d(xho
ZUK'z /* !8}x6 **FileAccess.java !9g>/9h *//文件访问(定位,写) hM[QR'\QS package NetFox; %y[
t+)!E import java.io.*; ByivV2qd{ 56!/E5qgW IgNL1KRD public class FileAccessI implements Serializable{ dFzlcKFFD aP` V //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 A[Pz&\@ RandomAccessFile oSavedFile; w<jlE8u long nPos; @Rs3i;"W =x-@-\m 50HRgoP5Y public FileAccessI() throws IOException $zD}hO9 { &-2i+KjEX this("",0); xO<Uz"R } &\
\)x.! *Ry{}|_8 8jjq)d4# public FileAccessI(String sName,long nPos) throws IOException 97\9!)`, { f{ER]U oSavedFile = new RandomAccessFile(sName,"rw"); a9niXy}a( this.nPos = nPos; <69Uq8GI oSavedFile.seek(nPos); by@}T@^\ } `>N_A!pr` .!yw@kg 7!jbID~ public synchronized int write(byte[] b,int nStart,int nLen) <j&LC
/]o { U`)o$4Bq int n = -1; K pSho< try{ 99u9L) oSavedFile.write(b,nStart,nLen); ? yek\X n = nLen; {3){f;b } HV\l86} catch(IOException e) u
ioBId { ctT6va e.printStackTrace (); pHv~^L%= } sFa5#w*> '/~j!H4q9 B,avI&7M;S return n; Jwe9L^gL } KV]8o' /><+[\q4LM {n-6e[ } MNVOlo A m+'vrxTY !)+8:8H' /* 6rg?0\A< **SiteInfoBean.java KQ2jeJ/pj */ +"F 9yb package NetFox; JVt(!%K}& nWb0S D/Hob public class SiteInfoBean { 5$Da\?Fpn q}MPl 2 ]}HuK# private String sSiteURL; //Site's URL mrId`<L5l{ private String sFilePath; //Saved File's Path 6ujePi <U private String sFileName; //Saved File's Name #P5tTCM private int nSplitter; //Count of Splited Downloading File !/wR[`s9w E'wJ+X9 + :y8wv|m public SiteInfoBean() TYN~c( {//nSplitter的缺省值为5 3e7P
w`gLl //default value of nSplitter is 5 \&.]!!Q this("","","",5); 1k?k{Ri } iES?}K/q iU9> qJ] GEQ3r'B| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0
V3`rK { e
QGhX( sSiteURL= sURL; t%Hy#z1W_ sFilePath = sPath; \SQ wIM sFileName = sName; (OT&:WwW this.nSplitter = nSpiltter; zcE[wM GMJ</xG p7eRAQ\' } e9@7GaL`"S 8nQjD<- 0VBbSn}Z< public String getSSiteURL() jce^Xf { ,+hH|$ return sSiteURL; K3On8 } |A% Jx__ 'v:%} qMv >nOU 8 public void setSSiteURL(String value) LJ+Qe%| { mOE%:xq9- sSiteURL = value; L-QzC<[F/ } 1Kc[).O1 VdetY\ WPu{
]<pl public String getSFilePath() eh5j { N]iu
o. return sFilePath; j@4AY}[tX } >4@/x{{ QM'Db`B q#!]5 public void setSFilePath(String value) <C6*-j1oz { *D6X&Hg&5 sFilePath = value; (M,IgSn9 } %?WR9}KU0 u[;,~eB%w :d ,]BB public String getSFileName() (@"5:M { ne(zGJd return sFileName; ]|PDsb"e } @ky<5r*JU( #FQkwX'g S#wy+* public void setSFileName(String value) SB#Y^! { |A0)-sVZ sFileName = value; Yl#|+xYA5[ } cN(Toj'` p3R: 3E6p svTKt%6X public int getNSplitter() ^^C@W?.z { yl'@p5n return nSplitter; Y!C8@B$MR3 } LqA&@ WXzSf.8p| ejjL>'G/|% public void setNSplitter(int nCount) ZgD%*bH*B { FC BsC# nSplitter = nCount; mIy|]e`SJ } N(W;\>P } qVDf98 @V>BG8Y !/;/ X\d /* Zl4X,9Wt **Utility.java t5"g 9`A L */ UG5AFZ\ package NetFox; "ytPS~ m: _hz}I>G@B public class Utility { V~%C me a#L:L8T;j 5zf bI public Utility() #FNSE*Y { o,D7$WzL <jwQ&fm)/R "7X[@xX@ } {k"t`uo_ 9>I&Z8J$M //线程睡眠 (O@fgBM public static void sleep(int nSecond) 2^;zj0]Rt { )A1u uW ( try{ ??u*qO:p Thread.sleep(nSecond); ^_rBEyz@ } Nm.G,6<J catch(Exception e) yPXa { c`E0sgp e.printStackTrace (); aB*'DDlx"r } B}U:c] } mY1Gm| ;.'\8!j //日志 MX)mm^A public static void log(String sMsg) ;b6h/*;' { ALY3en9, System.err.println(sMsg); 4A{6)<e } q4y sTm )kpNg:2p $3'xb/3| public static void log(int sMsg) W_bp~Wu
{ GnFm*L System.err.println(sMsg); qOs'Ljx6l } ~cL)0/j} } 49iqrP' E3"j7y[S L4t(Y7 /* ?;xL]~Q~1 **TestMethod.java %5yP^BL0 */ ;ZtN9l package NetFox; fG_<HJS(~ ? l>Ra0 D_)N!,i public class TestMethod { !(8)'<t9 IDK~
(t Xf%vfAf public TestMethod() $No^\.mV { ///xx/weblogic60b2_win.exe _fM=J+ try{ f>zd,|)At SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); P|tNmv[; //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %u!)1oOIz SiteFileFetch fileFetch = new SiteFileFetch(bean); LFX[v fileFetch.start(); 4L _AhX7 } n3"
@E<rW catch(Exception e){e.printStackTrace ();} 7I=vgT1F qp{3I("_ V
M{Sng } JKY lKBI3oYn q5G`N>"V public static void main(String[] args) x,j%3/J^2 { 3S=$ng new TestMethod(); W!R7D%nX } .$U=ngj\t } Sah!|9 点击下载更多相关资料
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