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/* `!rH0]vy **SiteFileFetch.java phr6@TI */ #K:|@d package NetFox; `@eo <6 import java.io.*; Y>LgpO. import java.net.*; E~Eh'>Y(B c|OIUc -h+=^, public class SiteFileFetch extends Thread { @|! 9~F eJFGgJRIvF ij i<+oul SiteInfoBean siteInfoBean = null; //文件信息Bean d5mhk[p7\J long[] nStartPos; //开始位置 '~Uo+<v$w long[] nEndPos; //结束位置 3)ac
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Z".mEF-b long nFileLength; //文件长度 *vqlY[2Ax boolean bFirst = true; //是否第一次取文件 `oQ)qa_ boolean bStop = false; //停止标志 V~ph1Boz2 File tmpFile; //文件下载的临时信息 @| kBc.(] DataOutputStream output; //输出到文件的输出流 $Ay
j4|_- o%_MTCANy //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9|#YKO\\i public SiteFileFetch(SiteInfoBean bean) throws IOException ug*#rpb { {a-bew siteInfoBean = bean; lIPy)25~ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); D.elE: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
d1$3~Xl] if(tmpFile.exists ()) fZ!fwg$ { iy_'D bFirst = false; 0?59o!@h read_nPos(); A??(}F L } ma@3BiM else #Bq.'?c'~ { .zxP,]"l nStartPos = new long[bean.getNSplitter()]; P[{qp8(g nEndPos = new long[bean.getNSplitter()]; ns`|G;1vv } oo sbf#V /c/t_xB Y
Y4"r\V 3";Rw9 } $@k[Xh 2K?~)q&t* m:|jv|f public void run() Esh3cn4 { NMq#D$T //获得文件长度 CMI'y(GN //分割文件 d3Dw[4 //实例FileSplitterFetch o|#Mq"od //启动FileSplitterFetch线程 PR rf$& u //等待子线程返回 8`Wj 1 ,q try{ Omy4Rkj8bh if(bFirst) b=[gK|fu { ;4XvlcGo nFileLength = getFileSize(); Bc%A aZ0x if(nFileLength == -1) e45gjjts { X :2%U System.err.println("File Length is not known!"); "[(&$I } py#` else if(nFileLength == -2) jM`)Nd { P&PPX#% System.err.println("File is not access!"); ]C.x8(2!f } :EOx>Pf_9) else ~<b/%l>h1 { O 1TJJ8 for(int i=0;i<nStartPos.length;i++) D4
{?f<G0F { "JI FF_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5)X;q- } aRFLh for(int i=0;i<nEndPos.length-1;i++)
!]]QbB { ;M,u,KH)/ nEndPos = nStartPos[i+1]; C? pi8Xg } VA4>!t) nEndPos[nEndPos.length-1] = nFileLength; J[E_n;d1 } yh9fHN)F } {ctEjgiE /7W N,a cBICG",TA //启动子线程 H:9Z.|{Gv fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; "-aak )7w for(int i=0;i<nStartPos.length;i++) JNhHQvi\ { w`Q"m x* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0Y rdu,c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), RiHOX&-7 nStartPos,nEndPos,i); 4dy2m! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); a^yBtb~,P fileSplitterFetch.start(); lZT9 SDtS } Xk#"rM< Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @\-i3EhR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J6x#c`Y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (!FUu nEndPos = " + nFileLength); ftBbO8e // fileSplitterFetch[nPos.length-1].start(); ]3.Un,F 8`bQ,E+2 |$[WnYP //等待子线程结束 a[TR_uR //int count = 0; IT,d(UV_ //是否结束while循环 uK6_H vHuy boolean breakWhile = false; 3f'dBn5 3$Ecq|4J: .Q'/e>0 while(!bStop) Wxjv=#3 { k2>gnk0 write_nPos(); z;Pr] *F Utility.sleep(500); Uh.XL=wY breakWhile = true; +<p?i]3CHe M%=V vE.I oK3uGPi
for(int i=0;i<nStartPos.length;i++) C)^FRnb { :uM2cc^ if(!fileSplitterFetch.bDownOver) >dH5n$Gb { {"<6'2T3 breakWhile = false; ml7nt0{ break; yX:A?U } 9G8n'jWyY } _4E .
P if(breakWhile) W}+f}/&l break; =GO/r;4 )c9]}:W& k<b`v&G //count++; u15-|i{y7 //if(count>4) F8 *e // siteStop(); Eyw)f> } HVb9YU+ i!zh9,i>M L||_Jsu System.err.println("文件下载结束!"); ZLA&<]Ad"$ } 6;/>asf catch(Exception e){e.printStackTrace ();} c*nH= } + -e8MvP tPO\ e] 1$,t:/'-4 //获得文件长度 gI^);JrTE public long getFileSize() r,p6J7/lfS { nquKeH int nFileLength = -1; 1VW;[ ocQ try{ AF{k^^|H URL url = new URL(siteInfoBean.getSSiteURL()); >`rK=?12< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }qUNXE@ httpConnection.setRequestProperty("User-Agent","NetFox"); S312h'K
j :SxOQ(n a/@<KnT int responseCode=httpConnection.getResponseCode(); u7|{~D&f if(responseCode>=400) e2#"o{+@ { 75Xi%mlE7 processErrorCode(responseCode); XQEGMaZ return -2; //-2 represent access is error |xI\)VE^ } t3 AZS0 bH7[6#y$ GD1=Fb"&) String sHeader; K
GlO;Q~7 T!6H5>zA 1j*I`xZ for(int i=1;;i++) L2ePWctq} { !Ju?REH //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); yHW=,V. //Utility.log(in.readLine()); I\R5Cb<p sHeader=httpConnection.getHeaderFieldKey(i); &s!"pEZWck if(sHeader!=null) G9\Bi-'ul { t+0&B" if(sHeader.equals("Content-Length")) f~Dl;f~H_; { cvn4Q- ^ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); xG<H${
k; break; :" ZH } 4 !lbwqo } OwIW;8Z else +Q, 0kv break; 7 q<UJIf } x&3!z[m@@ } ]ABpOrg catch(IOException e){e.printStackTrace ();} ]Jj\** catch(Exception e){e.printStackTrace ();} 9H*$3 ~CRr)(M %hU8ycI*h Utility.log(nFileLength); jY-i`rJN W38My j! Auhw(b>}TW return nFileLength; w<_.T# } Du>dTi~ yWIM,2x} P,RCbPC4 //保存下载信息(文件指针位置) oS)0,p private void write_nPos() zypZ3g{vz { ).eT~e
Gj try{ sm}q&m]ad output = new DataOutputStream(new FileOutputStream(tmpFile));
/U<-N'| output.writeInt(nStartPos.length); uF>I0J#z? for(int i=0;i<nStartPos.length;i++) ]I"oS? { GCrh4rxgg // output.writeLong(nPos); ^DHFP-G?e output.writeLong(fileSplitterFetch.nStartPos); L>{E8qv>w output.writeLong(fileSplitterFetch.nEndPos); p}.P^`~j } TyMRm output.close(); 8?W!U*0aS } ]}9cOb%I catch(IOException e){e.printStackTrace ();} );$Uf!v4 catch(Exception e){e.printStackTrace ();} ~BCSm]j } ~\hA-l36 k%QhF] t~p9iGX< //读取保存的下载信息(文件指针位置) [ (tgoh/ private void read_nPos() AO;`k]0e { +-,Q>` try{ 9>psQ0IRvr DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); MoA2Cp;8X int nCount = input.readInt(); >q
<,FY!A nStartPos = new long[nCount]; NTiJEzW} nEndPos = new long[nCount]; `Oys&]vb for(int i=0;i<nStartPos.length;i++) zsI0Q47\ { :c,\8n nStartPos = input.readLong(); Z~g~,q nEndPos = input.readLong(); =HP_IG_ } HKP\`KBCj input.close(); pRXA!QfO } j._9;HifZ catch(IOException e){e.printStackTrace ();} fl~k')s catch(Exception e){e.printStackTrace ();} n4)G g~PE } #e&j]Q$Eh
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,KkENp_ private void processErrorCode(int nErrorCode) |LKhT4rE { }.gDaxj System.err.println("Error Code : " + nErrorCode); uf`o\wqU } ~/[cZY@ OM]p"Jd q=bJ9iJsq //停止文件下载 qsFA~{o. public void siteStop() oypq3V=5 { MLmc]nL= bStop = true; .eXIbd<C for(int i=0;i<nStartPos.length;i++) 'O]_A57 fileSplitterFetch.splitterStop(); /{7x|ay] m&,d8Gss^ jL8& } BmUEo$w } i[d-n/) //负责部分文件的抓取 ci5ERv` **FileSplitterFetch.java 2DTH|Yv */ yt C{,g> package NetFox; dz5bW> A3&8@/6, -+|0LXo import java.io.*; M6AQ8~z import java.net.*; P>L-,R(7e 7r"!&P*, /lttJJDU public class FileSplitterFetch extends Thread { 8c+i+gp! ~n]:f7?I 8[f]9P/i String sURL; //File URL @Qruc\_ long nStartPos; //File Snippet Start Position ;#/b=j\pi long nEndPos; //File Snippet End Position w[PW-m^` int nThreadID; //Thread's ID {FQ
dDIj# boolean bDownOver = false; //Downing is over oX3Q9) boolean bStop = false; //Stop identical |\?-k FileAccessI fileAccessI = null; //File Access interface g_>)Q * _C6.%{ lqqY5l6j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ReKnvF~ { D8`,PXtV this.sURL = sURL; '4HwS$mW3 this.nStartPos = nStart; E3,Z(dpX! this.nEndPos = nEnd; w
\0=L=J nThreadID = id; (U!WD`Ym fileAccessI = new FileAccessI(sName,nStartPos);//定位 8 gOK?>'9 } ?xK9 @Z@yI2#e !SiZA" public void run() <6p{eGAQV { rVQ:7\=Z while(nStartPos < nEndPos && !bStop) JEY%(UR8 { `mw@" W@"M/<r@/ 7_#v_ A^ try{ 1P8$z:|~ URL url = new URL(sURL); 6xnJyEQUM HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M P0ww$( httpConnection.setRequestProperty("User-Agent","NetFox"); 76 =uk!#3{ String sProperty = "bytes="+nStartPos+"-"; ixiRFBUcF~ httpConnection.setRequestProperty("RANGE",sProperty); R(pvUm&L Utility.log(sProperty); |[!xLqG x"AYt:ewuc v .r$]O InputStream input = httpConnection.getInputStream(); b)@D*plS& //logResponseHead(httpConnection); #:' P3)& ^_5$+ -Rjn<bTIy byte[] b = new byte[1024]; J>hl&J int nRead; seAkOIc while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (jY.S|% { + 6r@HK`,t nStartPos += fileAccessI.write(b,0,nRead); n{4&('NRFP //if(nThreadID == 1) P[XE5puC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;1{S"UY } N@Slc
0 2Y 6/,W a^Zn
}R r Utility.log("Thread " + nThreadID + " is over!"); k qwS/s bDownOver = true; Ta/G //nPos = fileAccessI.write (b,0,nRead); ( Y/
DMQ } ,iSs2&$m catch(Exception e){e.printStackTrace ();} 'kW`62AX } 7
hnTHL } j nI)n* C6'[ Tn 0C3Yina9
* //打印回应的头信息 Zpu>T2Tp public void logResponseHead(HttpURLConnection con) ml?+JbLg0 { V7rcnk# for(int i=1;;i++) @gxO%@@ { V3@^bc! String header=con.getHeaderFieldKey(i); i>)Whr'e8 if(header!=null) D\*raQ`n //responseHeaders.put(header,httpConnection.getHeaderField(header)); c$uV8_ V Utility.log(header+" : "+con.getHeaderField(header)); / d6mlQS else 8(Z*Vz uu break; zac>tXU; } i9.52 } db#y]>^l 9QY)<K~a 4,$x~m`N public void splitterStop() C?hw$^w7T { 6"_FjS3Sl bStop = true; vj{h*~ } Ap}:^k5{ p[Q 1q\U
(^ } m?<C\&)6x |dX#4Mq^, FpW{=4yk /* >xP $A{ **FileAccess.java Y;#P"-yH *//文件访问(定位,写) ^{~y+1lt' package NetFox; A|y&\~<A import java.io.*; TC R( H.i_,ZF ]4z?sk@ public class FileAccessI implements Serializable{ b;x^>(It bd)A6a\h //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 sBRw#xyS RandomAccessFile oSavedFile; ,HMB`vF long nPos; ^vG*8,^S=8 8swj'SjX 2^UFP+Yw public FileAccessI() throws IOException /6 P()Upe { w,`x(!& this("",0); PkG+`N } S4?ssI rm"bplLZA w
#1l)+ public FileAccessI(String sName,long nPos) throws IOException AeUwih.
4 { FirmzB Il5 oSavedFile = new RandomAccessFile(sName,"rw"); A E7>jkHB this.nPos = nPos; 2!" N9Adt oSavedFile.seek(nPos); >mt<`s } AV&W&$ KtV_DjH: ]Ff&zBJ public synchronized int write(byte[] b,int nStart,int nLen) ^'FY!^dE { t~@TUTbx int n = -1; .`,YUr$. try{ 0Y!Bb2m oSavedFile.write(b,nStart,nLen); 0kC!v, n = nLen; YtIJJH } <cepRjDn catch(IOException e) urog.Q { }"xC1<] e.printStackTrace (); !T
@|9PCp } :5CwRg M>T#MDK\( Gm>8=
=c return n; %W`pTvF } x%x[5.CT ,"}'NH@ gL}K84T$S } Q) FL| g7d) YUc $> #PhOC /* /- kMzL **SiteInfoBean.java X8*q[@$ */ y'E)iI* package NetFox; !-2S(8 k92189B9j/ # <&=ZLN public class SiteInfoBean { \=83#*KK -JUv'fk 0 ]NsT0M private String sSiteURL; //Site's URL UGR5ILf private String sFilePath; //Saved File's Path b/S4b private String sFileName; //Saved File's Name ^M?uv{354 private int nSplitter; //Count of Splited Downloading File KN+*_L- TXy*- <#vR 5(DCq(\P* public SiteInfoBean() R8HA X {//nSplitter的缺省值为5 *(r85lEou) //default value of nSplitter is 5 |4-Ey! P this("","","",5); ]>`Q"g~0 } >:wk.<Z- 9`c :sop ^. Pn)J public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) m'429E]\S { k,q` ^E8k sSiteURL= sURL; O
gycP4z[ sFilePath = sPath; ~8|$KD4I sFileName = sName;
NU_VUd2 this.nSplitter = nSpiltter; Q$RP2& h!)(R< 8qBw;A) } _;0:wXib= ,
:kCt=4% [& hdyLt public String getSSiteURL() Gzm[4|nO^ { v_G4:tY return sSiteURL; gw5CU)r4$ } I#9K/[ =#>P! qLPI^g, public void setSSiteURL(String value) } 10Dvt>+ { ,cbP yg sSiteURL = value; 2poU\|H } + ^~n09 iAXx`>}m A
7TP1 public String getSFilePath() 3HfT9 { -98bX]8 return sFilePath; ;N4mR6 } wV(_=LF n}._Nb
5 (r7~ccy4 public void setSFilePath(String value) V#sANi?mpo { +/UInAM sFilePath = value; Ya,>E@oc } \W$>EH %7L'2/Y2x ~}TVM%0RTq public String getSFileName() 57r\s8 { ?DpMR/ return sFileName; +L X&1GX } ok[R`99 4#=^YuKaF1 c{&sf
y public void setSFileName(String value) [c3hwogf: { SUvHLOA sFileName = value; ^TB%| yZ _ } 4$y|z{[<
5 4\-kzGgmo `%rqQnVB public int getNSplitter() a:P%
r { c.d*DM}W return nSplitter; \WZ00Y,* } p%,JWZ[ HK
;C*;vC% >r{,$)H0 public void setNSplitter(int nCount) $R"~BZbt; { )|2g#hH5 nSplitter = nCount; 7$b78wax } $r_z""eOc } `cVG_=2 |@Z
QoH H,zRmK6A% /* Bv/v4(G5g **Utility.java znu?x|mV */ mEE/Olh W package NetFox; y+X%qTB AMtFOXx%I 33
N5> } public class Utility { TNiFl hq F1MPo;e ,!Ah+x public Utility() ?K}/b[[0v { f$/Daq <M <v0 d8 :a`l_RMU } YMm Fpy =FdS'<GM //线程睡眠 S* <:He&1 public static void sleep(int nSecond) oBIKtS*L { ~9x$tb x- try{ 6h;$^3x$ Thread.sleep(nSecond); UG1^G07s } u*PN1E catch(Exception e) 2uqdx'^" { H%sbf&
gi e.printStackTrace (); &o)j@5Y? } g3"`b)M } |-Y,:sY: 9g "?`_ //日志 9n44 *sZ public static void log(String sMsg) `_z8DA}E { Riu0;U( \ System.err.println(sMsg); GndF!#?N( } o3%Gc/6% &{l?j>|TM (}c}=V public static void log(int sMsg) `ZNzDr { M-0BQs`N System.err.println(sMsg); v')T^b
F@ } ~
dmyS?Or } o- GHAQ .}]5y4UQ. iv3NmkP1 /* p6I@o7f **TestMethod.java [
tmJ6^s */ Jfo#IRC package NetFox; *`mwm:4 R%54!f0
% Hz+edMUL public class TestMethod { u9}=g%TV +dIg&}Tr lts{<AU~ public TestMethod() J
Wof<D, { ///xx/weblogic60b2_win.exe >5)$Qtz# try{ aq[kKS` SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8CwgV //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \>M3E SiteFileFetch fileFetch = new SiteFileFetch(bean); -pyTzC$HO fileFetch.start(); ~?S/0]?c } i!sKL%z} catch(Exception e){e.printStackTrace ();} W
aks*^| :'a |cjq >L5[dkg% } lHr?sMt /ey}#SHm, 8 w^i public static void main(String[] args) o{nBtxZ" { aElEV
e3 new TestMethod(); iv:[]o } B-'Xk{ } (t fADaJM 点击下载更多相关资料
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