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/* 6)PnzeYW **SiteFileFetch.java hD[r6c */ AQ?;UDqU package NetFox; m5o$Dus+?' import java.io.*; FHSFH> import java.net.*; Hr7?#ZX;e MH|F<$42 Cw"[$E'J public class SiteFileFetch extends Thread { !rF1Remw 2^=8~I!n& id9 XwWV SiteInfoBean siteInfoBean = null; //文件信息Bean "L;@qCfhO long[] nStartPos; //开始位置 E4'z
long[] nEndPos; //结束位置 C+t0Zen FileSplitterFetch[] fileSplitterFetch; //子线程对象 *8_Dn}u?Jx long nFileLength; //文件长度 ;.Ld6JRunw boolean bFirst = true; //是否第一次取文件 fk9q 3 boolean bStop = false; //停止标志 Vh1y]#w File tmpFile; //文件下载的临时信息 *kpP)\P DataOutputStream output; //输出到文件的输出流 XDAP[V }.pqV
X{d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) m[%':^vSr public SiteFileFetch(SiteInfoBean bean) throws IOException 2$MoKOx8$ { d'&OEGb< siteInfoBean = bean; 1KY0hAx //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %wXjP`# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Ir-QD!!< if(tmpFile.exists ())
F3K<-JK+ { }]#z0'Aqsu bFirst = false; 8#HnV%|N read_nPos(); EP"Z 58&$R } T*gG <8 else OSfT\8YA { >tPf.xI|l nStartPos = new long[bean.getNSplitter()]; XjCx`bX^< nEndPos = new long[bean.getNSplitter()]; zRd.!Rv } *];QPi~ B'Jf&v mQ<4(qd) ul~6zBKO } `d^Q!QxE c ~~4eia) w;{Q)_A public void run() t#@z_Mn\ { @C!&lrf3 //获得文件长度 #rF`Hk: //分割文件 \+nV~Pi"A //实例FileSplitterFetch fI`gF^u( //启动FileSplitterFetch线程 Ww60-d}}Q //等待子线程返回 1x=x,lcL try{ Y#Q!mbp if(bFirst) n?$c"} { j{r@>g;3 nFileLength = getFileSize(); 8B &EH+ if(nFileLength == -1) EPH
n"YK { Bm,Vu 1]t System.err.println("File Length is not known!"); UimofFmI% } r180vbN$ else if(nFileLength == -2) =cZ24I { ~-6_-Y| System.err.println("File is not access!"); 8#lq: } g)^s+Y else 1++g@8 { 8Th,C{ for(int i=0;i<nStartPos.length;i++) .MG83Si { ~tt\^:\3~S nStartPos = (long)(i*(nFileLength/nStartPos.length)); * 30K}&T } ZIa,pON for(int i=0;i<nEndPos.length-1;i++) ^~-YS-.J#, { s5{=lP nEndPos = nStartPos[i+1]; >h\u[I$7 } qe#5;# nEndPos[nEndPos.length-1] = nFileLength; C0/^ 6Lu"o } \Z3K ~ } 2[Lv_<i| aIFlNS,y J_Tz\bZ3) //启动子线程 {eI'0== fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; nOL.% for(int i=0;i<nStartPos.length;i++) WYTqQqQk { ap )B%9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ur8+k4]\" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), c/tB_] nStartPos,nEndPos,i); 96<oX:# Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j;y~vX b fileSplitterFetch.start(); "E\mj'k } U< Xdhgo? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v;e8W9M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9/{ zS3h3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =n"k gn nEndPos = " + nFileLength); CUI+@|]% // fileSplitterFetch[nPos.length-1].start(); 30uPDDvar C$6FI`J ap}p?r //等待子线程结束 &Q~W{. //int count = 0; q/U-6A[0 //是否结束while循环 i m;6$3 boolean breakWhile = false; Ha-]U:Vcx gx9Os2Z|3 kaekH*m~ while(!bStop) g) oOravV { R>"Fc/{y write_nPos(); )Q
=>7%ZA Utility.sleep(500); X>o9mW breakWhile = true; vlbZ5 O[ird`/ ~SQxFAto for(int i=0;i<nStartPos.length;i++) ,<tJ`,0X { f<@!{y2Xe if(!fileSplitterFetch.bDownOver) |cma7q}p { pVy=rS- breakWhile = false; JyMk @Y break; xeU|5-d' } VjM3M<!g>M } Q p>b if(breakWhile) b/z-W`gw break; >J:=)1` V[nPTYO4 =WY'n
l' //count++; LOx+?4|y //if(count>4) +r8bGS]ki // siteStop(); eA4:]A" } [v"Z2F<.= K4!-%d$ LBK{-(% System.err.println("文件下载结束!"); (E0 } tbRW6 catch(Exception e){e.printStackTrace ();} c
3QgX4vq } Z;.-UXat |NfFe*q0;8 =*,SD //获得文件长度 6^"QABc public long getFileSize() +'?Qph6o,7 { u-TT;k' int nFileLength = -1; l/X_CM8y~ try{ iNA3Y URL url = new URL(siteInfoBean.getSSiteURL()); 5.~Je6K U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !2LX+*; httpConnection.setRequestProperty("User-Agent","NetFox"); xPm. TPj X(N~tE dE7x
SI int responseCode=httpConnection.getResponseCode(); Y.viOHL if(responseCode>=400) lYx_8x2 { nj[TTndJt processErrorCode(responseCode); K~
eak\= return -2; //-2 represent access is error d/7fJ8y8 } xo"GNFh! 2Xt4Rqk $ n$/|r String sHeader; x%B_v^^^ _gT65G~z ?*fa5=ql for(int i=1;;i++) Ma^jy. { }@r23g% //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5p0~AN) //Utility.log(in.readLine()); AjVC{\Ik sHeader=httpConnection.getHeaderFieldKey(i); t%=7v)IOE if(sHeader!=null) r6DLShP-Ur { :;k?/KU7 if(sHeader.equals("Content-Length")) ;,4*uU'vq {
=z.j{% nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); uC'-: t# break; pHeG{<^ } >ED;_L*_o } E'AR.! else U4 !bW break; UUt"8]@[ } F]$ Nu } VeA@HC`?" catch(IOException e){e.printStackTrace ();} Xoe|]@U` catch(Exception e){e.printStackTrace ();} y~9wxK noZbsI4
0,Ds1y^ Utility.log(nFileLength); 22l'kvo4" 7)rQf{q7 BIx*t9wA return nFileLength; N1 t4o~ } V}E['fzBFV "#d$$ 8 ?%O>]s //保存下载信息(文件指针位置) V6g*"e/8 private void write_nPos() V+gZjuN$ { vt
EfH try{ ]iV]7g8: output = new DataOutputStream(new FileOutputStream(tmpFile)); a5a
;Fp output.writeInt(nStartPos.length); x ytrd. for(int i=0;i<nStartPos.length;i++) >.?yz { $fb%?n{ // output.writeLong(nPos); j*%#~UFw output.writeLong(fileSplitterFetch.nStartPos); NLsF6BX/- output.writeLong(fileSplitterFetch.nEndPos); <a R } uLdHE5vr output.close(); WBjJ)vCA. } uKx:7"KD catch(IOException e){e.printStackTrace ();} v^9eTeFO catch(Exception e){e.printStackTrace ();} L$ T2 bul } hb[ThQ rZI63S `,O7S9]R+ //读取保存的下载信息(文件指针位置) !'$*Z( private void read_nPos() Q& [!+s:2J { 1j2U,_- try{ xW"O|x$6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); U][E`[m# int nCount = input.readInt(); ekx(i
QA nStartPos = new long[nCount]; dsIbr"m nEndPos = new long[nCount]; jOhAXe;~X{ for(int i=0;i<nStartPos.length;i++) 9SC1A -nF { I
Fw7?G, nStartPos = input.readLong(); H{cOkuy nEndPos = input.readLong(); $1=7^v[U } L=(-BYS input.close(); DgEdV4@p } cqU6 Y*n catch(IOException e){e.printStackTrace ();} ?y|&Mz'XJ( catch(Exception e){e.printStackTrace ();} Q<>u)%92@ } t[|rp&xG aT^
$'_ G B7Ket8<J private void processErrorCode(int nErrorCode) sI\NX$M { jTwSyW System.err.println("Error Code : " + nErrorCode); &>-'|(m+2 } PTHxvml bWL!= Gza=
0 //停止文件下载 t__f=QB/ public void siteStop() Y6wr}U { gV)/lDEM5 bStop = true; /5 z+N(RFC for(int i=0;i<nStartPos.length;i++) a;$V;3C{b& fileSplitterFetch.splitterStop(); zd_N' :6 YusmMsN?
:%sG'_d } `n,RC2yo } P)VQAM //负责部分文件的抓取 /yU#UZ4; **FileSplitterFetch.java '&Ur(axs */
n\9IRuYO package NetFox; nZiwR4kM xkf2; N5 sR import java.io.*; 4UbqYl3|a import java.net.*; i:Y5aZc/Ds ~_BjcY 7 @\i5 public class FileSplitterFetch extends Thread { (KO]>!t OGEe8Z9Jt 5_A*IC] String sURL; //File URL tIn`L6b long nStartPos; //File Snippet Start Position 1.%|Er 4 long nEndPos; //File Snippet End Position JCxQENsVqB int nThreadID; //Thread's ID ['>ZC3?"h boolean bDownOver = false; //Downing is over #^9bBF/ boolean bStop = false; //Stop identical +Zi+
/9Z(H FileAccessI fileAccessI = null; //File Access interface uPho|hDp y?cN RKrNmD*rk* public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Sa)sDf1+` { RKzO$T this.sURL = sURL; ;E{jn4B' this.nStartPos = nStart; ,e|"p[z~T this.nEndPos = nEnd; \ v+>qY<q nThreadID = id; ,XscO7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 `]]5!U2 } ;\|GU@K{hC W*iTg%a\k C@;e< public void run()
&I-T { D]>Z5nr | while(nStartPos < nEndPos && !bStop) W3ms8=z { t<c7%i#Od 3ouy-SQ C ]B P}MY< try{ byP< !p* URL url = new URL(sURL); Y8%l)g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y(aUB$" httpConnection.setRequestProperty("User-Agent","NetFox"); tKyGD|g S String sProperty = "bytes="+nStartPos+"-"; L[:AU e httpConnection.setRequestProperty("RANGE",sProperty); vC1fKo\p Utility.log(sProperty); 3 ;" [WOv }; 7I @x*xgf InputStream input = httpConnection.getInputStream(); 2 Y9u9;ah //logResponseHead(httpConnection); bLWY Tj Yx,E5}- TH y?Y byte[] b = new byte[1024]; uDJ;GD[yc int nRead; ;:oXe*d while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) H;<>uELie { trjpq{,[U nStartPos += fileAccessI.write(b,0,nRead); 'y>Y */ //if(nThreadID == 1) YH+(N // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ) x+edYw } (#6Fg|f4Y &ID! lEd o+8H:7,o' Utility.log("Thread " + nThreadID + " is over!"); <L*`WO]\l bDownOver = true; 7l/ZRz}1 //nPos = fileAccessI.write (b,0,nRead); %t6-wWM97 } H)S!%(x4 catch(Exception e){e.printStackTrace ();} F#L1~\7 } Yj bp: } OXpN8Dh5 V'RbTFb9Z 8PVjNS/ //打印回应的头信息 p-\->_9)y` public void logResponseHead(HttpURLConnection con) yEjiMtQll] { [aA@V0l for(int i=1;;i++) 2?6]Xbs{ { 2<!IYEyT String header=con.getHeaderFieldKey(i); j[R.UB3J if(header!=null) YL!{oHs4 //responseHeaders.put(header,httpConnection.getHeaderField(header)); 4X/UyBk Utility.log(header+" : "+con.getHeaderField(header)); .vy@uT, else HnjA78%i break; ZI1]B944ni } 5oCg&aT }
$v#`2S(7 }6.@ k{vbi-^6rf public void splitterStop() ZCZ@ZN { /
yBrlf bStop = true; <)!,$]S } +ansN~3 OE0G*`m Wq+GlB* } /i27F2NQm Q~0>GOq* AIn/v`JeX /* LWTPNp:"{w **FileAccess.java H
I_uR$m *//文件访问(定位,写) Q 318a0 package NetFox; `#l3a import java.io.*; NZ i3U 6YNL4HE? 2'- "&d+O public class FileAccessI implements Serializable{ NNbdP;=:u 2YKa <?_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 I-g/)2 RandomAccessFile oSavedFile; j:'g*IxM_ long nPos; ARf{hiV6Wt :EQ{7Op` X|Y(* $?D7 public FileAccessI() throws IOException
UsFn! !+ { I-r+1gty this("",0); =HsE:@ } M:}u| !*"fWahv &5R|{',(Y public FileAccessI(String sName,long nPos) throws IOException Ws`ndR { T{3nIF oSavedFile = new RandomAccessFile(sName,"rw"); "#o..?K this.nPos = nPos; =s4(Y oSavedFile.seek(nPos); +Z|3[#W } J,CwC) gHstdp_3 A)C)5W public synchronized int write(byte[] b,int nStart,int nLen) 9)'f)60^ { -g2l-N{& int n = -1; Yjjh}R# try{ J>}J~[ap\J oSavedFile.write(b,nStart,nLen); 3)W zX n = nLen; LO{Axf% } :+PE1=v catch(IOException e) X^ Is-[OvE { 0Z8"f_GK e.printStackTrace ();
6j<!W+~G } gk%@& TB/ BtC*]WB"_' 2Ckx.m & return n; z2uL[deN'" } rtj`FH??11 'V]&X.=zC _rwJ:r } ]h,rgO; 8XB[CbO Q<
:RLKVT /* ">oySo.B? **SiteInfoBean.java @m#OhERv */ 06S
R74 package NetFox; _VKI@ ;2<5^hgk {p84fR1P public class SiteInfoBean { aaR& -M@ W#p7M[ I x%>aee private String sSiteURL; //Site's URL PW5]+ |# private String sFilePath; //Saved File's Path L"m^LyU private String sFileName; //Saved File's Name kyJbV[o<# private int nSplitter; //Count of Splited Downloading File pd|KIs%jl }4A] x`3 i41~-?Bc public SiteInfoBean() eThaH0 {//nSplitter的缺省值为5 C!VhVOy>d //default value of nSplitter is 5 hO=L|BJ?I this("","","",5); K*>%,mP$i } ^+_rv q!$s<n ~3F'X public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .[Sis<A]% { VeYT[Us" sSiteURL= sURL; s#9q3JV0 sFilePath = sPath; J}#gTG( ' sFileName = sName; !T{+s
T this.nSplitter = nSpiltter; }
oPO` 0bTj/0G? VdlT+'HF } !g@Ky$ $DY#04Je\= :@(('X(". public String getSSiteURL() uJw?5kEbv< { V}jGxt0 return sSiteURL; Mog>W&U } im<bo Mv bA^uzE r9[S%Def public void setSSiteURL(String value) )?F&`+ { !HY^QK sSiteURL = value; fN&,.UB^p } \|HEe{nA pbH!u+DF !oWB5x~:P public String getSFilePath() i,6OMB
$ { TSB2]uH return sFilePath; ~gDYb#p } Cv**iW 'C]w3Rh' 8 A>OQR public void setSFilePath(String value) i2=- su { 1oQw)X sFilePath = value; &6eo;8
`U } Rb6BY-/J YYWD\Y`8 rzfLp public String getSFileName() w!F>fcm { j4$nr=d.6 return sFileName; Fs/CW\ } msl.{ 'S`l[L:.8 cl& w/OJ# public void setSFileName(String value) oD2:19M@p { on_h'?2 sFileName = value; uo"<}>iJ } E'08'8y ?;XO1cs IiPX`V>RC public int getNSplitter() .?Eb{W)^br { H$`U]
=s| return nSplitter; $$9H1)Ny } Y{}
ub]i F9%_@n cYSn
public void setNSplitter(int nCount) 4.O) /0sU { q[s,q3n~ nSplitter = nCount; TU|#Pz7n-Z } f_c\uN@f } K[T0);hZR ,6^<Vg "laf:Ty1 /* 6#z8 %kaX **Utility.java [ V.67_~ */ 2S8;=x}/ package NetFox; Cl0kR3Y .j4y0dh33 |"*P`C= public class Utility { <B6md
i'R N9-0b 7KgaXi3r public Utility() xlv(PVdn { =xk>yw!O) 9PB%v.t5y 7Z>vQ f B } [N,+mX /stvNIEa //线程睡眠 vHi%UaD-y public static void sleep(int nSecond) P'KA-4! { ?mNB:-Q try{ 6,q0F*q Thread.sleep(nSecond); k$$SbStD } <X*oW ". catch(Exception e) 0>Y3xNb { -6)n QNj| e.printStackTrace (); OU{c|O } "}()/ } P00G*iY~\ lf"w/pb' //日志 {IOc'W-C#2 public static void log(String sMsg) C@a I*+@-" { !Q\*a-C System.err.println(sMsg); vA6`};| } `,AOxJ:$ 4q.;\n /Xi21W/ public static void log(int sMsg) Bw;isMx7 { q{h,}[U=
System.err.println(sMsg); B
W*8 } 8Yc-3ozH } zU1D@ faOiNR7;h /T6bc^nOW /* e
( ]] **TestMethod.java A{>w5T */ bIm4s package NetFox; 8(`e\)%l0 u^xnOVE 4-
QlIIf public class TestMethod { @7}XBg[pI e(w c
[bv =x+1A)Q public TestMethod() 4Pr^>m { ///xx/weblogic60b2_win.exe &&CrF~
try{ o|>=<l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;40Z/#FI //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); n
^9?(a4u SiteFileFetch fileFetch = new SiteFileFetch(bean); Q>Ct]JW& fileFetch.start(); Lu^uY7
?} } vRtERFL catch(Exception e){e.printStackTrace ();} OybmyGHY 6<@mBZ ^6# yL6E,~ } Ak3^en ^/Hf$tYI!` 1PxRj public static void main(String[] args) W/A@q o" { Q1Qw45$ new TestMethod(); )'jGf;du } ]*]*O|w } ,Gy,bcv{ 点击下载更多相关资料
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