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/* 9u(pn`e 3 **SiteFileFetch.java lrv-[}} */ N ^rpPq package NetFox; )sm9%|.& import java.io.*; )-3~^Y#r_ import java.net.*; OOSf<I*> eA!Z7 ' o7!A(Eu public class SiteFileFetch extends Thread { =IMmtOvJ gt}Atr6>_ dA hcA. SiteInfoBean siteInfoBean = null; //文件信息Bean ; CCg]hX long[] nStartPos; //开始位置 6m;>R%S_ long[] nEndPos; //结束位置 I3nE]OcW@ FileSplitterFetch[] fileSplitterFetch; //子线程对象 5?>4I"ne long nFileLength; //文件长度 ~JL
qh boolean bFirst = true; //是否第一次取文件 vMp=\U-~^ boolean bStop = false; //停止标志 ,H7_eVLWR File tmpFile; //文件下载的临时信息 "mJo<i} DataOutputStream output; //输出到文件的输出流 #,#_" s1 >8uW //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -t4:%-wv public SiteFileFetch(SiteInfoBean bean) throws IOException uQ W)pD{_ { 7T)y"PZ siteInfoBean = bean; Z3TCi7,m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); w PR Ns9^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); fYP,V0P if(tmpFile.exists ()) m=6?%'
H} { @o0HDS bFirst = false; \7LL neq read_nPos(); h2zSOY{su } bra2xHK@ else <9pI~\@w { %6cr4}Zm} nStartPos = new long[bean.getNSplitter()]; jo"nK,r nEndPos = new long[bean.getNSplitter()]; bW
W!,-|R } j>JBZ#g yT/rH- j;5 ]x
metv|7 _K9PA[m5~ } DIGw4g4Kt K7&]|^M9 VzSkqWF/" public void run() Zl3l=x h { {1)b LG|$ //获得文件长度 a^&"gGg //分割文件 OG<*&V //实例FileSplitterFetch z!6_u@^- //启动FileSplitterFetch线程 bnfeZR1m_ //等待子线程返回 ODu/B'*
try{ H,KH}25 if(bFirst) 5]*lH t { 'n7|fjX?Y nFileLength = getFileSize(); YTTy6*\,_ if(nFileLength == -1) KN_n :`cH{ { ^iEf"r System.err.println("File Length is not known!"); h:Gs9]Lvtv } ek)rsxf1A else if(nFileLength == -2) wrJQkven- { qsp3G7\'= System.err.println("File is not access!"); 8i"CU:( } Ds]
.Ae else AT
t.}- { %rs2{Q2k for(int i=0;i<nStartPos.length;i++) ?:vg`m!* { ;L87
%P(. nStartPos = (long)(i*(nFileLength/nStartPos.length)); *><j(uz! } %tkqWK: for(int i=0;i<nEndPos.length-1;i++) ;,Vdj[W$> { >;G_o="X nEndPos = nStartPos[i+1]; `ci
P } iU.` TqR7 nEndPos[nEndPos.length-1] = nFileLength; vH6(p(l } TH4f"h+B3" } G AH< VKXi*F9 EO'+r[Y //启动子线程 nS$4[!0 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9i #,V@ for(int i=0;i<nStartPos.length;i++) xz@*V>QT { si%V63 ^lN fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Nc6y]eGz siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uR")@Tc nStartPos,nEndPos,i); ;N!n06S3 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MeV4s%*O+ fileSplitterFetch.start(); g0~m[[ } 0* ^f
EoV // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s!09cS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5Q}HLjG8Z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (
K-7z nEndPos = " + nFileLength); *s1o?'e // fileSplitterFetch[nPos.length-1].start(); lh0G/8+C zxv y& K~&3etQF //等待子线程结束 ,iiI5FR //int count = 0; Q\~#cLJ/
//是否结束while循环 $ ga,$G boolean breakWhile = false; qsN}KgTjg @uxg;dyI~ Oa5-^&I while(!bStop) Odt<WG { Q Na*Y@i write_nPos(); 'wLW`GX. Utility.sleep(500); T2T?)_f /
breakWhile = true; odeO(zuU dZJU>o'BG &6Wim<* for(int i=0;i<nStartPos.length;i++) $iy(+} { Y^?PHz'Go if(!fileSplitterFetch.bDownOver) /{ 8 .Jcx$ { tN)Vpb\J breakWhile = false; dI,H:g break; ,l)AYu!q4F } H,fVF837 } {6*UtG if(breakWhile) j;rxr1+w break; :)Nk U%2{PbL
/P{'nI //count++; #4sSt-s& //if(count>4) M
w+4atO4[ // siteStop(); aOW~! f/M } X`}4=> Yceex}X*5 QRY7ck:N System.err.println("文件下载结束!"); 5sMyH[5zY } ?rwHkPJ{* catch(Exception e){e.printStackTrace ();} YP}r15P } Ef6LBNWY. 6FI`0j=~ !:dhK //获得文件长度 y=WCR*N public long getFileSize() nqujT8 { W QyMM@# int nFileLength = -1; V_Y2 @4 try{ 771r(X?Fa URL url = new URL(siteInfoBean.getSSiteURL()); ^d/,9L\U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `l}r&z(8 httpConnection.setRequestProperty("User-Agent","NetFox"); !%yd'"6Dl jowR!rqf /\uW[mt int responseCode=httpConnection.getResponseCode(); =^3B&qQNq if(responseCode>=400) \M-$|04Qt { cX-)]D processErrorCode(responseCode); `lq[6[n return -2; //-2 represent access is error d[Rs } so\8.(7n 9RN! <`H Xc@%_6 String sHeader; Z;_WU =B(zW.Gf l\yFx for(int i=1;;i++) LV&tu7c { 7ST[XLwt%} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }cll? 2 //Utility.log(in.readLine()); dOFxzk,g&R sHeader=httpConnection.getHeaderFieldKey(i); EV@xUq!x. if(sHeader!=null) }XiS:
{ *fq=["O if(sHeader.equals("Content-Length")) 1e;^MzB" { t`DoTb4 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pbivddi2 break;
@>J4K#" } zb}:wUR } \)ac,i@fy else HzM^Zn57% break; aT#R#7<Eg } V&DS+'P } [KR`%fD0 catch(IOException e){e.printStackTrace ();} !9i,V{$c`" catch(Exception e){e.printStackTrace ();} X+{4,?04+ (i7]N[ }`yIO"{8n Utility.log(nFileLength); 7 [55 "qb3\0O {vAq08 return nFileLength; -lyT8qZ:( } ocy fU=}X :?{ **&= `ejE)VL=8h //保存下载信息(文件指针位置) jd=k[Yqr private void write_nPos() 7vV3"uns { j3 ~: \H try{ lC.Yu$O5 output = new DataOutputStream(new FileOutputStream(tmpFile)); bzmT.! output.writeInt(nStartPos.length); 5-bd1!o for(int i=0;i<nStartPos.length;i++) ekfD+X { {y'c*NS // output.writeLong(nPos); (hVhzw"~ output.writeLong(fileSplitterFetch.nStartPos); lx~!FLn output.writeLong(fileSplitterFetch.nEndPos); `w]=xe } B[Uvj~g output.close(); \Btv76*, } ?K{CjwE.M catch(IOException e){e.printStackTrace ();} [X=-x=S, catch(Exception e){e.printStackTrace ();} H(!)]dO } _5.^A&Y* <r,l ~jmHzFkQ //读取保存的下载信息(文件指针位置) X<_(gg private void read_nPos() xe2Ap[Y'M { ju(&v*KA try{ |~CN]N DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); VLc=!W} int nCount = input.readInt(); t&wtw nStartPos = new long[nCount]; ;p/RS# nEndPos = new long[nCount]; rFSLTbTf for(int i=0;i<nStartPos.length;i++) t*82^KDU { |SZRO,7x nStartPos = input.readLong(); @X"p"3V nEndPos = input.readLong(); G#8HY VF } fpJM)HU input.close(); [x
?38 } 3zo]*6p0 catch(IOException e){e.printStackTrace ();} l)m\i_r: catch(Exception e){e.printStackTrace ();} DmAMr=p } ~X;r}l=k< SPA_a\6_ xy`aR< L private void processErrorCode(int nErrorCode) d|Wpub { \XwXs5"G System.err.println("Error Code : " + nErrorCode); X~abn7_ } -[OGZP`8 ehj&A+Ip ,c_[`q\ //停止文件下载 o2? [*pa public void siteStop() EOhUr=5~ { `.nkC_d bStop = true; p"ht|x for(int i=0;i<nStartPos.length;i++) 4A0R07" fileSplitterFetch.splitterStop(); ^.jIus5 k{Yj!C>
# Bn*D<<{T } S*rgYe!E } dUeM+(s1 //负责部分文件的抓取 q.i@Lvu# **FileSplitterFetch.java "
M8j? */ ->&AJI0 package NetFox; +#O?a`f `Q6@,-(3 _m0HgLS~ import java.io.*; 6d"dJV.\ import java.net.*; 6grJoim| PH97O`" 2H fP$. public class FileSplitterFetch extends Thread { ("o<D{A Lhu2;F\/ 1eI>Yy>} String sURL; //File URL i{PRjkR long nStartPos; //File Snippet Start Position Hk8:7"4Q long nEndPos; //File Snippet End Position .z7XYmv int nThreadID; //Thread's ID 7qA);N boolean bDownOver = false; //Downing is over YnuC<y
&p boolean bStop = false; //Stop identical s@
m
A\ FileAccessI fileAccessI = null; //File Access interface
' ^gF 2fTkHBhn& z~+_sTu public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException hf0G-r_ow { BIDmZU9tL this.sURL = sURL; VkhZt7]K}B this.nStartPos = nStart; "cRc~4%K this.nEndPos = nEnd; ,XCC#F(d1 nThreadID = id; 4JFi|oK0H fileAccessI = new FileAccessI(sName,nStartPos);//定位 cEi{+rfZd| } }q T @. JT&CJ&#[h rX%#Q\0h public void run() :+ @-F>Q { oP5G*AFUq while(nStartPos < nEndPos && !bStop) Tz+2g&+ { 8,=Ti7_ e"hm|' k!t5>kPSQ try{ Mkko1T=6 URL url = new URL(sURL); I:uxj% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [yL%+I httpConnection.setRequestProperty("User-Agent","NetFox"); n99:2r_ String sProperty = "bytes="+nStartPos+"-"; ?tE}89c httpConnection.setRequestProperty("RANGE",sProperty); IK(G%dDw Utility.log(sProperty); Crh5^? 4O9HoX#-? 5|x&Z/hL InputStream input = httpConnection.getInputStream(); U }MU>kzb //logResponseHead(httpConnection); ?,]%V1(@V` "w=p@/C 03J,NXs byte[] b = new byte[1024]; _a8^AG int nRead; WW0N"m' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) %MU<S9k { yopEqO nStartPos += fileAccessI.write(b,0,nRead); g$ZgR)q //if(nThreadID == 1) N'Ywn}!js // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5dT-{c%w4 } JxiLjvIq -WE pBt7* )"|'= Utility.log("Thread " + nThreadID + " is over!"); f,d @*E bDownOver = true; P9:7_Vc //nPos = fileAccessI.write (b,0,nRead); dwv xV$Nt } wWY6DQQB catch(Exception e){e.printStackTrace ();} D(Zux8l } :RzcK>Gub= } Ig"Krz QB#f'X >wej1#\3 //打印回应的头信息 <5@+:7Dv public void logResponseHead(HttpURLConnection con) {F6hx9? { gEIjG for(int i=1;;i++) Of7j~kdh83 { DGO_fR5L String header=con.getHeaderFieldKey(i); ~bL(mq if(header!=null) z[0L?~$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0fxA*]h Utility.log(header+" : "+con.getHeaderField(header)); LDBxw else ,8;;#XR3 break; ;dRTr * } .(VxeF(v_k } @{@x2'-A ;EW]R9HCH 9Wb9g/L public void splitterStop() +I/7eIG?| { 7F4$k4r< bStop = true; (+4gq6b } .r[DqC "%D+_Yb'X {O5;V/00} } llhJ,wD 6?+bi\6 RxAWX?9Z /*
8yOzD **FileAccess.java oPk 2ac *//文件访问(定位,写) L/%3_, package NetFox; ]r$S{< import java.io.*; 09_3`K.* Up`$U~%- n/pM[gI public class FileAccessI implements Serializable{ )U>q>< isj<lnQ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 *P$5k1 RandomAccessFile oSavedFile; r}WV"/]p long nPos; }{ pNasAU ykRKZYfsw( D(~6h,=m public FileAccessI() throws IOException yT-m9$^v { G-Sw`HHo this("",0); Pgr>qcbql } W`eYd|+C *Y9"-C+ }qmZ public FileAccessI(String sName,long nPos) throws IOException *Mg=IEu-6[ { Zr;.`(> oSavedFile = new RandomAccessFile(sName,"rw"); }Da8S|)H this.nPos = nPos; ro}plK(<WQ oSavedFile.seek(nPos); 'iXjt
MX } $$A{|4,aI 9C-F%te7 w<J$12
"p+ public synchronized int write(byte[] b,int nStart,int nLen)
Y_p { A8e b{qv int n = -1; {u9(qd;; try{ Z!G;q}zZ! oSavedFile.write(b,nStart,nLen); zXbTpm n = nLen; Gw~^6( Qu } W5
fO1F catch(IOException e) G&/}P$ { !b rN)b)f e.printStackTrace (); (4$lB{% } BtBy.bR uEVRk9nb V F6OC4 K return n; %Q1v8l.} } M4nM%qRGQ ]B3 0d }C2I9Cl } 9 ?MOeOV8 +@Fy) {C7 Q7"KgqpQ3 /* /B|#GJ\\3 **SiteInfoBean.java >]T(}S~ */ @]H&(bw package NetFox; v^[tK2&v gLl?e8[F z;#}uC public class SiteInfoBean { '[qG ,^f ]'~'V2Ey ^zsCF0 private String sSiteURL; //Site's URL w][
; private String sFilePath; //Saved File's Path L@CN0ezQs private String sFileName; //Saved File's Name VG&|fekF private int nSplitter; //Count of Splited Downloading File h^x7[qe qL A Ujq)h:` public SiteInfoBean() 6st(s@> {//nSplitter的缺省值为5 }! zjj\g^ //default value of nSplitter is 5 kJJQcjAP: this("","","",5); wnt^WW=a[ } ; bP7| ~NU~jmT2 F3';oyy public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) oJyC{G { Dih~5 sSiteURL= sURL; u+8_et5T sFilePath = sPath; P4R.~J ;8 sFileName = sName; +n2x@ 0op this.nSplitter = nSpiltter; d@8_?G} 3Y=T8Gi# -lb}}z+/ } ^6J*yV% +1h^9Y' 7@+0E2' public String getSSiteURL() -cY/M~ { dn%/SJC return sSiteURL; ^Ud`2 OW;2 } "]zq<LmX oY +RG|j@ P5] cEZ n public void setSSiteURL(String value) yU .B(| { d{ OY sSiteURL = value; {nj\dU } ~)oC+H@{ P3lNns3 B: {bmvy public String getSFilePath() G@,qO#5& { ~a/yLI"'g return sFilePath; LjxTRtB_ } Zh3]bg5 Hb!Q}V+Kb8 J
)@x:,o public void setSFilePath(String value) 0qR;Z{k { ~j F5%Gu sFilePath = value; 7J$ ^R6rh } QI`Z[caF (qohb0 Kpj0IfC,10 public String getSFileName() L$7v;R3 { $Fd9iJ!k return sFileName; KwpNS(]I } .>CqZN,^ V4VTP]'n $XT&8%|*7 public void setSFileName(String value) "b -KVZ
{ CHBCi) '6h sFileName = value; J5|Dduv
} ly,d = We9C9)0 ?bN8h)>QQ8 public int getNSplitter() /l:3*u { Ev$?c9*> return nSplitter; C(W?)6? } 3R4-MK S~Nx;sB [@>Kd`!' public void setNSplitter(int nCount) }>)"!p;t_ { u!{P{C nSplitter = nCount; W.0dGUi* }
].:S!QO } 2psLX #( X4M{I =A=er1~% /* M-|4cd]6 **Utility.java
]9A9q<lZ */ M[TgNWl/[ package NetFox; $C^94$W a*%>H(x "v^Q
! public class Utility { dc%+f gX6'!}G8] Lxd*W2$3_ public Utility() LD^V="d { c&F"tLl dwAju:-H *K m%Vl } !:e}d+F atW;S99# //线程睡眠 CS6,mX public static void sleep(int nSecond) M@{GT/`Pf { =@{H7z(p& try{ hc~--[1c: Thread.sleep(nSecond); M}M. } *"1]NAz+ catch(Exception e) \zgRzO'N { H={fY:% e.printStackTrace (); 3go!P]) } xE4T\%-K } xNq&_oY7 &\c$s //日志 t{84ioJ"$ public static void log(String sMsg) 0W]Wu[k { ("H:T?4Qs System.err.println(sMsg); n;O
3.2 } JLc\KVmF _|H]X+| G^ n|9)CVW public static void log(int sMsg) iFga==rw { o+6Y/6Xp@ System.err.println(sMsg); m,)Re8W- } @@!t$dD } p3sz32RX % J+'7'g 80:na7$)# /* c#Ux{^ZE **TestMethod.java )+\e+Ad}H */ $,'r}
% package NetFox; 2R|2yAh bjD0y
cB[ >I!dJH/gj public class TestMethod { qK(?\t$ PksHq77 :vV?Yv%P)n public TestMethod() 2+y4Gd 7 { ///xx/weblogic60b2_win.exe )c+ZQq try{ F>!fu.Ws SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +a;:7[%& //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]9b*!n<z SiteFileFetch fileFetch = new SiteFileFetch(bean); 2BRY2EF fileFetch.start(); C]eb=rw$ } +F+jC9j(< catch(Exception e){e.printStackTrace ();} _(oJ8h( =]etw ~~wz05oRG
} >f}rM20Vm Xj|j\2$ 0 l_QpPo!a public static void main(String[] args) F<G.!Y8!& { ;~xkT' new TestMethod(); M62V NYt } "4Anh1,js } \s+<w3 点击下载更多相关资料
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