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/* |=js!R| **SiteFileFetch.java c!ieN9^+ */ +"1fr
package NetFox; .XT]\'vW import java.io.*; \q@Co42n\ import java.net.*; gA}?X qV0GpVJZU? *#9?9SYSk public class SiteFileFetch extends Thread { [Ob09#B%:5 Ggry,3X3 =P%?{7 SiteInfoBean siteInfoBean = null; //文件信息Bean ;pj,U!{%s\ long[] nStartPos; //开始位置 GTM@9^ long[] nEndPos; //结束位置 0`V;;w8 FileSplitterFetch[] fileSplitterFetch; //子线程对象 xzHb+1+p long nFileLength; //文件长度 )FN\jo!!. boolean bFirst = true; //是否第一次取文件 z HT#bP:o boolean bStop = false; //停止标志 #/>
a`Ur_ File tmpFile; //文件下载的临时信息 Z!-V&H. DataOutputStream output; //输出到文件的输出流 lK_T%1Gz :%_h'9Qq //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Vi`P
&uPF public SiteFileFetch(SiteInfoBean bean) throws IOException &F:%y(;{Y { WjguM siteInfoBean = bean; : T{VCw:* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6of9lO: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); S!rVq,| d if(tmpFile.exists ()) ,BFw-A { sJ{r+wY bFirst = false; 8<Pi}RH read_nPos(); ~b@"ir+g4 } Z((e-T#, else *q"1I9zvT { G.r .Z0 nStartPos = new long[bean.getNSplitter()]; 6l:uQz9 nEndPos = new long[bean.getNSplitter()]; Dn)B19b } B@v
(ZY #jJ0Mxg ZUD{V Oy b0t|do+ } =ld!=II `A9fanh *{,}pK2* public void run() X.sOZb?$ { 7 0PGbAD //获得文件长度 m>|7&l_ //分割文件 <0;G4fE7[H //实例FileSplitterFetch d3\KUR^ //启动FileSplitterFetch线程 BiDyr //等待子线程返回 |ZC'a! try{ T% GR{mp if(bFirst) +koW3> { >{l
b|Vx nFileLength = getFileSize(); KrR`A(=WL if(nFileLength == -1) LP !d|X { 3?D{iMRM System.err.println("File Length is not known!"); m&yHtnt } F"cZ$TL] else if(nFileLength == -2) "!_vQ^y { gF`hlYD System.err.println("File is not access!"); Xvk+1:D } ~^'WHuzPy else ?gBFfi { ~k%XW$cV for(int i=0;i<nStartPos.length;i++) /;vHAtt;f { -BSO$'{7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); b6xz\zCL } X,c`,B03 for(int i=0;i<nEndPos.length-1;i++) "_2;+@+ { M)U)Sc zHO nEndPos = nStartPos[i+1]; *2fJdY } (&u'S+ nEndPos[nEndPos.length-1] = nFileLength; rp^:{6O } gW^4@q } )?I*zc P,b&F cltx(C> //启动子线程 qA[cF$CIl) fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; EG|_YW7 for(int i=0;i<nStartPos.length;i++) Q+/P>5O/ { x0%yz+i{: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), z`eMb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GXk
|p8 nStartPos,nEndPos,i); kkW }:dBl Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^x$1Nf fileSplitterFetch.start(); OI8}v } \%9QE // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q,Y^9g"B`~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); E^A!k=> // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .|Yn[?( nEndPos = " + nFileLength); +~*e B // fileSplitterFetch[nPos.length-1].start(); I0><IaFy ef!f4u\ H:
;XU //等待子线程结束 x8x-b>|$&< //int count = 0; 1|AY&u%fiP //是否结束while循环 fz?woVn boolean breakWhile = false; :`lP+y?a1 \j-:5M#m Sx (E'?] while(!bStop) o?cNH { vR>GE?s6 write_nPos(); lauq(aD_C Utility.sleep(500); l_8ibLyo breakWhile = true; F@#p .XVL JJ# 4#.Q|vyl]" for(int i=0;i<nStartPos.length;i++) mg>wv[ 7 { P!IXcPKW53 if(!fileSplitterFetch.bDownOver) I[?bM- { sl(go^ breakWhile = false; uHRxV"@}[1 break; "c?31$6 } xn@oNKD0 } ];5Auh0o if(breakWhile) (9=E5n6o break; /1D.Ud^ !N_eZPU.v (i?9/8I //count++; 9Zmq7a
E //if(count>4) |7 Ab_ // siteStop(); 9]lyV } A_e5Vb,u. {t.S_|IE (uy\~Zb System.err.println("文件下载结束!"); &Nw|(z&$ } _
b</
::Tp catch(Exception e){e.printStackTrace ();} XX
"3.zW } Sqyju3Yp 8J- ?bo Z6Z/Y()4Tl //获得文件长度 xP;>p|
M public long getFileSize() .<xD'54 { yq<W+b/ int nFileLength = -1; P_H_\KsH*( try{ lDF7~N9J_ URL url = new URL(siteInfoBean.getSSiteURL()); g:!R't? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); e\f\CMb httpConnection.setRequestProperty("User-Agent","NetFox"); &Vu-*? (d*||" QC&,C}t, int responseCode=httpConnection.getResponseCode(); !4<A|$mQ if(responseCode>=400) ?AQA>D#W { ts("(zI1E processErrorCode(responseCode); \PFj w9s return -2; //-2 represent access is error 2$VSH& } feeHXKD| 1'iQlnMO@ QUfF>,[sv String sHeader; W7@Vma` &3xda1H ?^^TR/ for(int i=1;;i++) `*`ZgTV { #l.s>B4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @v!#_%J //Utility.log(in.readLine()); {x[C\vZsi] sHeader=httpConnection.getHeaderFieldKey(i); 4x?I,cAN if(sHeader!=null) o>T+fBHE { y\[* mgl: if(sHeader.equals("Content-Length")) fF=tT C { ]{#Xcqx nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ?YDMl break; =W2I0nr. } )q\6pO@ } KoWG:~>| else Bn=YGEvz break; ?'"BX } )vg@Kc26 } PlT_]p catch(IOException e){e.printStackTrace ();} \OWxf[ catch(Exception e){e.printStackTrace ();} Lxv_{~I* tw.z5 <X5ge>. Utility.log(nFileLength); $fT#Wva-\d ,t9CP %nE%^Enw return nFileLength; <]|!quY<* } yX%> %#$ vq-;wdq?2 _J#oAE5]! //保存下载信息(文件指针位置) Ir*{IVvej private void write_nPos() +qqCk { "{3|(Qs try{
klY, @ output = new DataOutputStream(new FileOutputStream(tmpFile)); twK 3 output.writeInt(nStartPos.length); RyM29uD for(int i=0;i<nStartPos.length;i++) IjQgmS~G { 8]O#L}" // output.writeLong(nPos); [a}Idi`
K output.writeLong(fileSplitterFetch.nStartPos); F[0~{*/|G output.writeLong(fileSplitterFetch.nEndPos); x") Bmw$ } e eyZ$n output.close(); TIaiJvo } n!lE|if catch(IOException e){e.printStackTrace ();} [9Tnp]q catch(Exception e){e.printStackTrace ();} 0AoWw-H6V } MBU4Awj No+BS%F5 &_j<!3* //读取保存的下载信息(文件指针位置) *YX:e@Fm.a private void read_nPos() s$0dLEa9 { X &G]ci try{ BJLeE}=H DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); nr(C*E int nCount = input.readInt(); -~H
"zu` nStartPos = new long[nCount]; HzuG- V nEndPos = new long[nCount]; m`Z.xIA7; for(int i=0;i<nStartPos.length;i++) 9i{(GO { :b_hF nStartPos = input.readLong(); pL> Yx> nEndPos = input.readLong(); z8)&ekG } qF`]}7"^ input.close(); i~M-V=Zg } HW'I $ . catch(IOException e){e.printStackTrace ();} 'dv( catch(Exception e){e.printStackTrace ();} 98uMD } w_LkS/ #G?",,&dM M9(lxu y1 private void processErrorCode(int nErrorCode) "+
k}#<P4\ { fi&>;0?7 System.err.println("Error Code : " + nErrorCode); i1]}Q$ } 1-.i^Hal 7qWa>fX /#L4ec-' //停止文件下载 %rEP.T\i public void siteStop() 9VIAOky- { T8W^qrx.v bStop = true; qDfhR`1k for(int i=0;i<nStartPos.length;i++) 8vfC fileSplitterFetch.splitterStop(); <$#^)]Ts kKDf%= &XXr5ne~C } L&]{GNw } /7Q9(} //负责部分文件的抓取 _6YfPk+ **FileSplitterFetch.java 1Vz3N/AP%? */ {?A/1q4rr package NetFox; 8)83j6VF E(f|LG[I ?[DVYP import java.io.*; E5*pD*# import java.net.*; \Il?$Kb/ c`\qupnY gl2l%]=\' public class FileSplitterFetch extends Thread { e<~bDFH OF; "%IW~} GW7+# String sURL; //File URL X]\; f long nStartPos; //File Snippet Start Position E%Ko[G long nEndPos; //File Snippet End Position r CUs int nThreadID; //Thread's ID }We-sZ/w7r boolean bDownOver = false; //Downing is over 3-[+g}kak? boolean bStop = false; //Stop identical r $ YEq5 FileAccessI fileAccessI = null; //File Access interface )2u_[Jc= R[m+s=+ a\B?J public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException (S6>^:;=~ { ]IDhE{ this.sURL = sURL; 5*Dh#FRp this.nStartPos = nStart; 5CH8;sMK this.nEndPos = nEnd; _BCq9/ nThreadID = id; y"K[#&,0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 KR%NgV+}!0 } 'mF&`BN}b *w6F0>u G1I<B public void run() };gcM@]]E {
Mi}k>5VT while(nStartPos < nEndPos && !bStop) 6!=q+sw/X { Zl.,pcL >yLdrf y~VLa try{ Le,;)Nd URL url = new URL(sURL); gXY]NWI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C0ORBp httpConnection.setRequestProperty("User-Agent","NetFox"); 'S9jMyZrZ String sProperty = "bytes="+nStartPos+"-"; 7dR]$~+*e httpConnection.setRequestProperty("RANGE",sProperty); '
wp _U/ Utility.log(sProperty); \"Qa)1| w.+G+r= ~{{7y]3M- InputStream input = httpConnection.getInputStream(); S&Hgr_/}c //logResponseHead(httpConnection); YjPj#57+ ]L3MIaO2T 3,Iu!KB byte[] b = new byte[1024]; Odw9]`,T int nRead; dkQP.Tj$i while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Pv*]AF;9pQ { z1.vnGP nStartPos += fileAccessI.write(b,0,nRead); "DX2Mu= //if(nThreadID == 1) Dh<}j3] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :*t5? } <uo@k' Nkn2\w #TB
3|= Utility.log("Thread " + nThreadID + " is over!"); e=_Ng
j) bDownOver = true; pTH5-l_f] //nPos = fileAccessI.write (b,0,nRead); jFI`CA6P } s;[WN. catch(Exception e){e.printStackTrace ();} {.Brh"yC } I:;umyRH } '<6DLtZl [88PCA: EbJc%%c //打印回应的头信息 $Xs`'>," public void logResponseHead(HttpURLConnection con) YmHu8H_Q { Bt(nm>Ng for(int i=1;;i++) Sb }=j;F { p]7IoO
-@ String header=con.getHeaderFieldKey(i); |!CAxE0d$B if(header!=null) m<J:6^H@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); *0_Q0SeE,o Utility.log(header+" : "+con.getHeaderField(header)); +.uQToqy else VWk{?*Dp break; ~CHVU3 } *De'4r 2 } nUCOHVI7 NFqGbA| U[Lr+nKo\ public void splitterStop() zT>BC}~.b { k/)h @K8@ bStop = true; N_l_^yD } E=]|v+#~ ss`Sl$ RP k'1nD } B'b OK`p '*<I<? z; =}Yz[-I /* O<MO2U+^x **FileAccess.java p@oz[017/J *//文件访问(定位,写) Ue!yK package NetFox; StiWa<"c import java.io.*; [n3@*)q's D J7U6{KLq T`GiM%R;g public class FileAccessI implements Serializable{ mrig5{ Mt@Ma ]! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 WYIv&h<h" RandomAccessFile oSavedFile; N686~ long nPos; 2AEVBkF;M {+EnJ" yI/ FD public FileAccessI() throws IOException Zh`[A9I/ { b,>>E^wd! this("",0); 3u<
ntx >< } 2q*wYuc Y+5aT(6O bGxHzzU} public FileAccessI(String sName,long nPos) throws IOException `v)ZOw9& { lAkg47i oSavedFile = new RandomAccessFile(sName,"rw"); 2WE01D9O this.nPos = nPos; 1*.*\4xo oSavedFile.seek(nPos); pnXwE-c_ } sD|}?7 p =-~qBw IsDwa qd| public synchronized int write(byte[] b,int nStart,int nLen) ]<S{3F= { )4>7X)j> int n = -1; ARG8\qU try{ t/l<X]o oSavedFile.write(b,nStart,nLen); P(a}OlG n = nLen; %D~Mij } g8@F/$HY catch(IOException e) Lyit`j~yH { $)d34JM e.printStackTrace (); Mh{>#Gs } Eqh*"hE7 AJ)&+H ;s -@m< return n; tq51;L } 45OAJ?N ?#RhHD DWN9_*{ } ncTMcu v:n[H]K| +,TrJg /* EK&0Cn3z **SiteInfoBean.java )JJF}m= */ ls~9qkAyLx package NetFox; #)3 B !OMCsUZ whm|"}x)u public class SiteInfoBean { Xg;;<
/Z mA@!t>=oMq kI2+& private String sSiteURL; //Site's URL cwzgIm+ private String sFilePath; //Saved File's Path C>SOd] private String sFileName; //Saved File's Name ^'fgQyj private int nSplitter; //Count of Splited Downloading File y>)c?9X Y?L>KiM$ _]{LjJ!M public SiteInfoBean() (H\ `/%Bp {//nSplitter的缺省值为5 nzbAQ3v //default value of nSplitter is 5 $VhY"< this("","","",5); &9"Y:), } f>|<5zm#< _ {6l} KP7 { public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) wuW{2+)B { D4uAwmc sSiteURL= sURL; V^rL sFilePath = sPath; [B +:)i sFileName = sName; c2?VjuB0 this.nSplitter = nSpiltter; %?Q&a ] 9ExI, 6ud<U#\b& } >0uj\5h)I] `6;$Z)=. 5:C>:pA V public String getSSiteURL() >s1?rC { `5rfO6; return sSiteURL; [HL>Lp&A? } ZOpKi:\ $?dQ^]<, ,eWLig
public void setSSiteURL(String value) 1'F!C { E VC]B} sSiteURL = value; M|zTs\1I } !
h92dH Od:-fw ^P*-bV4 public String getSFilePath() o\; hF3 { U<E]c 4* return sFilePath; d={o|Mf } `uZMln @ f1;@a>X
FCWk8/ public void setSFilePath(String value) pjs4FZ`Pd; { ?%Ww3cU+J sFilePath = value; e8#83|h } <q>d@Foi )[|_q, (E,Ibz2G:e public String getSFileName() 7upWM~H^ { yz5! >|EB return sFileName; 7[UD;&\k } q]VB}nO gNc;P[ gS@<sO$d> public void setSFileName(String value) y.6/x?Qc { .wyuB;: sFileName = value; $G5:/,Q } El: @l% &Yc'X+'4 EU04U public int getNSplitter() #TC}paIpj { |\/\FK]?] return nSplitter; =8%*Rrj^ } 1N:~5S}s> >EZZEd 29VX-45 public void setNSplitter(int nCount) xplV6q` { Wq"-T.i nSplitter = nCount; /oLY\>pD } MLg{Y?@ } %u_dxpx kyt HOn# ,D]g]#Lq /* 72.Msnn **Utility.java x5V))~Ou */ 6,MQT,F package NetFox; Yyr9Kj: -A=3W3:C "v(pluN| public class Utility { :Fu7T1 {$i>\) /&_q"y9 public Utility() BG=
J8 { {@3v$W~7M E^br-{|{ ';My"/
Z- } L F } d EtaKo}!A} //线程睡眠 ! K_<hNG& public static void sleep(int nSecond) E_DQ.!U!o { ] $r].,& try{ yT5OFD|T Thread.sleep(nSecond); yU4mS;GX } nk7>iK!i catch(Exception e) 9V[}#(f$ { sR[!6[AA e.printStackTrace (); )0ydSz`B } iyd$_CJ z } N)AlQ'Lwx !H[01 //日志 1q3"qYH public static void log(String sMsg) D~U RY_[A { ey,f igjd. System.err.println(sMsg); f 1+ } VB#&`]rdo kh:_,g Lo#G. s| public static void log(int sMsg) x[Hx.G}5+ { peT91b System.err.println(sMsg); i$Kx@,O8t } CCol>:8{P } /3K)$Er 19c_=$mV l|E4 7@# /* >]ZE<. **TestMethod.java P}UxA! */ N3aqNRwlk package NetFox; @ =~k[o NN1}P'6Ha UZrEFpi public class TestMethod { O(!;7v} h6^|f%\w*i sgGA0af public TestMethod() -,T!/E { ///xx/weblogic60b2_win.exe V,0$mBYa try{ Wf"GA i SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VHMQY*lk //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 0Xw>_#Y/xS SiteFileFetch fileFetch = new SiteFileFetch(bean); 1[u{y{9 q fileFetch.start(); !<HMMf,-D } SQn.`0HT catch(Exception e){e.printStackTrace ();} VjNr<~ |d Z"_8l3 (a8iCci: } 2[uFAgf@ 1'Q6l Rvx7}ZL! public static void main(String[] args) !ehjLFS? _ { fCF.P"{W" new TestMethod(); $fT5Vc]B4 } f\_PNZCc } qlYi:uygY 点击下载更多相关资料
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