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/* iW-t}}Z>B **SiteFileFetch.java U-ULQ| 6U */ y0y+%H- package NetFox; b8e*Pv/ import java.io.*; acy"ct*I import java.net.*; iI}nW (Y>U6 BMF3XcH~G public class SiteFileFetch extends Thread { %WmZ ]@M I'P.K| "R qWkx:-g] SiteInfoBean siteInfoBean = null; //文件信息Bean [@zkv)D6 long[] nStartPos; //开始位置 E8
\\X long[] nEndPos; //结束位置
TiTYs FileSplitterFetch[] fileSplitterFetch; //子线程对象 R<t&F\> long nFileLength; //文件长度 8@Q"YA3d+ boolean bFirst = true; //是否第一次取文件 fA;x{0CAMX boolean bStop = false; //停止标志 JfR kp File tmpFile; //文件下载的临时信息 "hfw9Qm DataOutputStream output; //输出到文件的输出流 zcZ^s v> Wl?<c
uw00 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) DU(X,hDBF public SiteFileFetch(SiteInfoBean bean) throws IOException }&=uZ: { rC~_:uXtE siteInfoBean = bean; f)qPFM]%z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :E}6S tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x={kjym L if(tmpFile.exists ()) w:n(pLc< { (1OW6xtfG bFirst = false; ;Kt'Sit read_nPos(); EwC5[bRjUp } zv&ePq\# else F1zT )wW { 0,+EV, nStartPos = new long[bean.getNSplitter()]; 6
bYC nEndPos = new long[bean.getNSplitter()]; -i2D#i' } iz,]%<_PE 9$n+-GSK nqBG]y aI }3LBbG0Bw } dVij <! Lu `4se7{'UK` V}j%gy` public void run() X^u4%O[' { pW`ntE#L //获得文件长度 CD*f4I#d //分割文件 !k4 }v'= //实例FileSplitterFetch p`shYyE //启动FileSplitterFetch线程 [P (rY //等待子线程返回 >aNbp try{ };4pZceV if(bFirst) `M towXj { $K5ni {M; nFileLength = getFileSize(); @'6S[zU if(nFileLength == -1) Krt$=:m|1 { cg>!<T* System.err.println("File Length is not known!"); aUsul'e;M } @2-Hj~ else if(nFileLength == -2) ]?v?Qfh2 { ~Rx~g System.err.println("File is not access!"); v4nvZ6 } ~xsb5M5 else 6{Krw\0 { z(8)1#(n7 for(int i=0;i<nStartPos.length;i++) F(?Fz8 { LC~CPV'F nStartPos = (long)(i*(nFileLength/nStartPos.length)); \<0G
kp } :mCw.Jz<h for(int i=0;i<nEndPos.length-1;i++) }3
fLV { G_4K+
-K nEndPos = nStartPos[i+1]; ~z-?rW } Fjb4BdZP nEndPos[nEndPos.length-1] = nFileLength; x9FLr}e } wdN>KS2! } A)O_es2 ,)B~cic'u 0xvMR&.H //启动子线程 %RfY`n fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Zi2Eu4p l{ for(int i=0;i<nStartPos.length;i++) ,6y-.m7> { tkm~KLWV&7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sK"" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -$sl!%HO% nStartPos,nEndPos,i); d=xI Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |,M#8NOp: fileSplitterFetch.start(); t
wa(M? } +Tgy,oD0 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), JN;TGtB^p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &"~,V6,q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HlOAo:8' nEndPos = " + nFileLength); Q+y-*1
// fileSplitterFetch[nPos.length-1].start(); EA%#/n Sh~ 8jEk 9}'l=b:Jms //等待子线程结束 (F4d Fh //int count = 0; /jK17}j //是否结束while循环 $h|I7` boolean breakWhile = false; "R\\\I7u 3Aqe;Wf9%+ (|ct`KU0# while(!bStop) ^Xt]wl*]+ { gOES2
4$2 write_nPos(); ~,`\D7Z3 Utility.sleep(500); VfE^g\Ia breakWhile = true; .H[Lo> 7DHT)9lD/ Gr"2G,,VI for(int i=0;i<nStartPos.length;i++) D/!eov4" { LzEE]i if(!fileSplitterFetch.bDownOver) p[k9C$@e} { HPd+Bd breakWhile = false; (`uC"M Lk break; ,pGCgOG#}c } ([4{n } ~;O=
7 if(breakWhile) Is*0?9qU break; S*DBY~pZy {ZBb.$}RC [&]YVn>kj //count++; Lu#@~ //if(count>4) 5>z:[OdY* // siteStop(); 3Oig/KZ } *{D:1S ,{mf+ 3&$, H $qdU!c System.err.println("文件下载结束!"); 'mY,>#sT } :BZx)HxQ catch(Exception e){e.printStackTrace ();} +D{*L0$D" } ,[K)E !\D]\|Bo mGyIr kE //获得文件长度 me}Gb a public long getFileSize() 5+Zx-oWq_ { DHu jpZXQ int nFileLength = -1; VkP:%-*#v try{ ZZ.0' URL url = new URL(siteInfoBean.getSSiteURL()); !^"!fuoNC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0.+Z;j httpConnection.setRequestProperty("User-Agent","NetFox"); Z@aL"@2]a ;NVTn<Uj qxCL int responseCode=httpConnection.getResponseCode(); aKU8"
5 if(responseCode>=400) bFdg'_ { &l}xBQAL processErrorCode(responseCode); WMRgf~TY=2 return -2; //-2 represent access is error O09g b[ } ~322dG )^@V*$D z8[|LF-dx String sHeader; *wZV*)} EjCzou `,]PM)iC for(int i=1;;i++) P*=3$-` { r\- k/ 0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ZaV66Y> //Utility.log(in.readLine()); 8}b[Q/h! sHeader=httpConnection.getHeaderFieldKey(i); )s[S.`STz if(sHeader!=null) ;xC~{O { T{xo_u{Q if(sHeader.equals("Content-Length")) QF6JZQh< { Pb&+(j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); gG> ^h1_o~ break; weadY,-H8 } yFtf~8s3 } 6? ly.h$ else >V=@[B(0 break; jmVy4* P_ } jJC((1| } TTak[e&j3 catch(IOException e){e.printStackTrace ();} nezbmpL4 catch(Exception e){e.printStackTrace ();} ;XuEMq,Di n
9M6wS ai9,4 Utility.log(nFileLength); vK~KeZ\,p= [<$d@}O 2{:
J1'pC return nFileLength; 6MQ:C'8T&= } _
9]3S>Rn mQuaO#
I, ,1+_k ="Z //保存下载信息(文件指针位置) ="E
V@H?U private void write_nPos() nL~
b { /hR]aw try{ Jtk(yp{Zz output = new DataOutputStream(new FileOutputStream(tmpFile)); ]`9K|v output.writeInt(nStartPos.length); 'mR+W{r for(int i=0;i<nStartPos.length;i++) W4Q]<<6& { Q(7l<z // output.writeLong(nPos); .q }k output.writeLong(fileSplitterFetch.nStartPos); yt,;^o^ output.writeLong(fileSplitterFetch.nEndPos); j)*nE./3 } 6%1o<{(%f output.close(); ?QVI'R:Z? } KK|Jach catch(IOException e){e.printStackTrace ();} VHNiTp catch(Exception e){e.printStackTrace ();} 4+bsG6i } NQ=YTRU Z_+No :F7I E+ 20-> //读取保存的下载信息(文件指针位置) . %7A7a private void read_nPos() 2wvDC@ { 5,Zn$zosJC try{ s50ln&2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); q>X2=&1 int nCount = input.readInt(); gp2)35 nStartPos = new long[nCount]; :"]ei@ nEndPos = new long[nCount]; b"9,DQB=i for(int i=0;i<nStartPos.length;i++) W -&5
v { TaG-^bX8B nStartPos = input.readLong(); P#PQ4uK \ nEndPos = input.readLong(); ~G:7*:[b } c
@R6p+ input.close(); O2f2Fb$B7 } 2=EKAg=S catch(IOException e){e.printStackTrace ();} ?C3cPt" catch(Exception e){e.printStackTrace ();} [*t EHW } ak[)+_k_ 9v0|lS!- (=9&"UH private void processErrorCode(int nErrorCode) <&iBR { +_Z/VQv System.err.println("Error Code : " + nErrorCode); H;1}Nvvd } (P-<9y@ z^.0eP8\j v!Z 9T //停止文件下载 $(U|JR@ public void siteStop() C+5nft6: { A$cbH. bStop = true; r8rR _M{P for(int i=0;i<nStartPos.length;i++) ZI7<E fileSplitterFetch.splitterStop(); jL SZ#H E3!twR*Aw &
j43DYw4 } HV@:!zM } UZ#2*PH2E //负责部分文件的抓取 "L]_NST **FileSplitterFetch.java b3+PC$z2h */ z{\.3G package NetFox; Pp2)P7 ?}[keSEh> bd4q/w4q import java.io.*; "|if<hx+ import java.net.*; /V&Y@j s><co] uZ+< public class FileSplitterFetch extends Thread { )c/]
8KU W=!f `c(@WK4 String sURL; //File URL |wDCIHzQ long nStartPos; //File Snippet Start Position U,'n}]=4A3 long nEndPos; //File Snippet End Position \"SI-`x int nThreadID; //Thread's ID J5k% boolean bDownOver = false; //Downing is over yWzTHW`)Mr boolean bStop = false; //Stop identical <mN3:G FileAccessI fileAccessI = null; //File Access interface 5S1m&s5k \1ZfSc tz,FK;8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k;sUD mrO { ~J|0G6H this.sURL = sURL; _bX)fnUu this.nStartPos = nStart; 7u zN/LAF this.nEndPos = nEnd; {-xnBx nThreadID = id; DxlX- fileAccessI = new FileAccessI(sName,nStartPos);//定位 {#vo^& B } `d8TA#|` )Ii=8etdv hXCDlCO public void run() '&9b*u";x( { /SiQw7yp% while(nStartPos < nEndPos && !bStop) $)U
RY~;i { @:63OLlrG 4T:ZEvdzf M-NR!? 9 try{ 'Gk|&^ URL url = new URL(sURL); p s2C8;zT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <t8}) httpConnection.setRequestProperty("User-Agent","NetFox"); CV k8MA String sProperty = "bytes="+nStartPos+"-"; yxH[uJpb httpConnection.setRequestProperty("RANGE",sProperty); Vh&uSi1V Utility.log(sProperty); \?j(U8mB> 8:f(PN %lBFj/B InputStream input = httpConnection.getInputStream(); e.N#+ //logResponseHead(httpConnection); s
SDBl~g R#0UwRjeF u URf byte[] b = new byte[1024]; =#W6+=YN8 int nRead; K$4Ky&89
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k20tn
ew { ="V6z$N nStartPos += fileAccessI.write(b,0,nRead); l{<@[foc //if(nThreadID == 1) HxjhP( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r;-\z(h } BwR)--75 V[~/sc ) .k}h'nE Utility.log("Thread " + nThreadID + " is over!"); #soWX_> bDownOver = true; d;`JDT //nPos = fileAccessI.write (b,0,nRead); >6c{CYuT } !( /dbHB catch(Exception e){e.printStackTrace ();} *cf#:5Nl } p &A3l } "_lSw3 oYW:ptJ &Mol8=V) //打印回应的头信息 (f7R~le public void logResponseHead(HttpURLConnection con) `On%1%k8 { Ls( &. for(int i=1;;i++) A," u~6Bn { gF&1e5`i String header=con.getHeaderFieldKey(i); BRzrtK if(header!=null) F8q|$[nH //responseHeaders.put(header,httpConnection.getHeaderField(header)); |(]XZ !{ Utility.log(header+" : "+con.getHeaderField(header)); 0y*8;7-|r) else Pwf":U) break; 3{CXIS } ->d3FR } }}<^fM Dc
U$sf* *~cq
(PFQ public void splitterStop() q>t#5Z81 { NbH;@R)L bStop = true; nPE{Gp) } } jx J5F3d U 1vZr{\ ? g}G#j } 51xiX90D BKi@c\Wb )m|)cLT& /*
(cx
Q<5 **FileAccess.java vr"O9L
w *//文件访问(定位,写) y2cYRHN[X} package NetFox; PY[nnoF"| import java.io.*; h:xvnyaI ''tCtG"
Xi
Z/RSZ- public class FileAccessI implements Serializable{ lxf+$Z`~: ;?4EVZ#o //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B 1jeIk, RandomAccessFile oSavedFile; FN\*x:g long nPos; }20~5! id+ ~ V 4
Fl>XM public FileAccessI() throws IOException I'}&s|6 { Y7BmW+ this("",0); @q]4]U) } 2u Zb2O ||D PIn] >e>%AMzo[ public FileAccessI(String sName,long nPos) throws IOException -Gy=1W`09 { s5h}MXIXw oSavedFile = new RandomAccessFile(sName,"rw"); y*=sboX this.nPos = nPos; OYSq)!: oSavedFile.seek(nPos); S#kYPe } |P@N}P@ L+N\B@ 0- Fs"i fn0 public synchronized int write(byte[] b,int nStart,int nLen) ;6:9 EEd { D%L^[|)c\s int n = -1; Jr5dw=B gw try{ 't6l@_x oSavedFile.write(b,nStart,nLen); LAkBf n = nLen; /% g+|C } IdqCk0lVD catch(IOException e) ,p{naT%R { =^1jVaAL e.printStackTrace (); wx^Det } 1w~PHH`~ 9U8x&Z]P 3\2%i6W6 return n; @R%*; )*F } ,OWk[0/ O}>@G v4<W57oH } p[w! SR%= ?a#Gn2 Q 9fK)j1$ /* 9}%$j **SiteInfoBean.java /5)*epF+ */ E*O($tS package NetFox; NB1KsvD{ ]!ox2m_U e8rZP(g&g public class SiteInfoBean { f`:GjA,J$ D6Au)1y=& Vm|KL3}NRv private String sSiteURL; //Site's URL ,VS(4 private String sFilePath; //Saved File's Path UAPd["`)y private String sFileName; //Saved File's Name 4d\^ private int nSplitter; //Count of Splited Downloading File 5mQ@&E~#W 23P&n(. OKAU*}_ public SiteInfoBean() ele@xl {//nSplitter的缺省值为5 L/Q[N^ (^ //default value of nSplitter is 5 XHekz6_ this("","","",5); g:z<CSIq/ } H.\`(`6 9Q=VRH: &y5"0mA public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) D3cJIVM { g35!a<JW
sSiteURL= sURL; Iz1x| EQ sFilePath = sPath; iP0m1 sFileName = sName; tGgxI D this.nSplitter = nSpiltter; q)i %*IY gYD1A\ T[Zs{S } }9+;-*m/ 4~,Z ' k ~.aR=m\#
public String getSSiteURL() &cL1 EQ( { ~f h return sSiteURL; >x{("``D0y } Jqj!k*=/ Ea&|kO| 5Jbwl$mZ public void setSSiteURL(String value) iX$G($[l( { [3jJQ3O, sSiteURL = value; rZKfb}ANQ } BB6[(Z r,Uk)xa/^ 7v*gwBH public String getSFilePath() $Z:O&sD{ { C`hdj/!A return sFilePath; Kcm+%p^ } 1uAjy(y :~otzI4%! f' ?/P~[ public void setSFilePath(String value) hx9{?3# { )i~AXBt} sFilePath = value; )A\
ZS<@Z7 } /W/e%. <0})%V?- C^L+R7 public String getSFileName() FJ_7<4ET { ;Z]Wj9iY return sFileName; `,qft[1 } P.y +jyu 3YHEH\60^ z&6_}{2,] public void setSFileName(String value) gQ_<;'m)2 { N&HI)X2& sFileName = value; jE*{^+n
} aKDY_D \N9=13W<lK 2 ? qC8eC public int getNSplitter() PVI Oe}N { Fi/iA%, return nSplitter; qX,q*hr- } V&*IZt& ~*HQPp?v aJ'Fn public void setNSplitter(int nCount) k+J%o%* < { MgXZN{ nSplitter = nCount; AY /9Io- } ;z'&$#pA } ?()*"+N(ck dKzG,/1W[m $
VT) /* M+ +Dk7B **Utility.java J :O!4gI */ $94lF~ package NetFox; S2$66xr# g88k@<Y vNSUrf,r public class Utility { `NIb?/!f I~&*^q6 | /HdXJL9B public Utility() L^JU{\C { %Psg53N 1aAOT6h c8&3IzZ } i]ZGq7YJ% t/[2{'R4 //线程睡眠 'gY?=,dF> public static void sleep(int nSecond) f Fi=/} { A[l
)>: try{
Va?]:Q Thread.sleep(nSecond); xm{?h,U, } QNbZ) catch(Exception e) G#%Sokkb' { n*\o. :f e.printStackTrace (); Fl)nmwOc } TzKM~a# } $n<1D -0!r O ~5t[ //日志 *$9U/ d public static void log(String sMsg) !KI^Z1dP( { 3eUi9_s+ System.err.println(sMsg); _WS8I> } ThV>gn5 0Z2XVq~T$ JZ}zXv public static void log(int sMsg) "mn?* { Zq4%O7% System.err.println(sMsg); aj4ZS } k~)CJ6} } ozY$}|sjDT F > rr. &$XTe2 /* :
;8L1' **TestMethod.java FRxR/3& */ y{M7kYWtHV package NetFox; Kb]}p ICz:>4M-dn Tv#d>ZSD public class TestMethod { S:{xx`6K reR@@O <oXBkCi0r public TestMethod() Ko&4{}/ { ///xx/weblogic60b2_win.exe 3^P;mQ$p1 try{ 2=?3MXcjy SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 0=&S?J#! //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 4M%|N SiteFileFetch fileFetch = new SiteFileFetch(bean); 8pEA3py fileFetch.start(); Wu6'm&t } sSh." H catch(Exception e){e.printStackTrace ();} 9qDM0'WuU *ELU">!}G 0xZ^ f}@L } JFI*Pt;X9 " O
r1 fC Ep(xlHTv public static void main(String[] args)
kMW9UUw { P84YriLo new TestMethod(); ts<\n-f } gaC4u,Zb } 48z%dBmTT* 点击下载更多相关资料
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