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/* }l$M%Ps!a **SiteFileFetch.java 9\3% 5B7 */ ^y'xcq package NetFox; q)gZo[]~ import java.io.*; W>
.O"Ri import java.net.*; idnn%iO i,rP/A^q
Y<TlvB)w public class SiteFileFetch extends Thread { ONJW*!( X@Eq5s }`6-^lj SiteInfoBean siteInfoBean = null; //文件信息Bean VOwt2&mZ long[] nStartPos; //开始位置 ?2[=llS4 long[] nEndPos; //结束位置 fOiLb.BW FileSplitterFetch[] fileSplitterFetch; //子线程对象 k/AcXU%O+ long nFileLength; //文件长度 l2GMVAca boolean bFirst = true; //是否第一次取文件 ]Vhhx`0 boolean bStop = false; //停止标志 +JZ<9,4 File tmpFile; //文件下载的临时信息 G?\o_)IJ DataOutputStream output; //输出到文件的输出流 ;d G.oUk= $>v^%E;Y4 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) q_>DX,A public SiteFileFetch(SiteInfoBean bean) throws IOException <y'B
!d# { jjBcoQU$o siteInfoBean = bean; gXI_S9z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 2g-'.w tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Y?%MPaN: if(tmpFile.exists ()) RBr { @dX0gHU[c bFirst = false; z/ T| read_nPos(); _tL+39 u } S;NChu?8
else WhE5u&` { w3Aq[1U0 nStartPos = new long[bean.getNSplitter()]; 9pE)S^P nEndPos = new long[bean.getNSplitter()]; C yC<{D+ } ^q"p8 [ /*$?PXt ~cSC-|$^& !Y=s_)X } o;FjpZ :eS7"EG{3 Zm%}AzM public void run() qA9*t { 5{#9b^ //获得文件长度
&k\7fvF //分割文件 z QoMHFL3 //实例FileSplitterFetch Xfx(X4$ 9 //启动FileSplitterFetch线程 }@@1N3nnxV //等待子线程返回 0LoA-c<Ay try{ M7yJ2u <Ty if(bFirst) l1jS2O( { l,h#RTfry nFileLength = getFileSize(); I OF~V)8k= if(nFileLength == -1) HG@!J>YaD { uI%h$ System.err.println("File Length is not known!"); 5<IUTso5h } ;Iw'TF else if(nFileLength == -2) !f)'+_d { gtJ^8khME System.err.println("File is not access!"); ]gTaTY } )_+" else ZT8. r0 { y>2v 9;Qp for(int i=0;i<nStartPos.length;i++) %'\D_W& { C,]Q/6'> nStartPos = (long)(i*(nFileLength/nStartPos.length)); <WaiJy? } PZLW yp for(int i=0;i<nEndPos.length-1;i++) ] 5P{* { 'BAe>r_Pn nEndPos = nStartPos[i+1]; po=*%Zs*T } >~BU<# nEndPos[nEndPos.length-1] = nFileLength; (n"M) } ,~K_rNNZ } ?jw)%{iKYV Yc:b:\0}F6 XF\`stEnb //启动子线程 <n }=zu fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ":]O3 D{r for(int i=0;i<nStartPos.length;i++) rorzxp{ { `<HY$PAe fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \Zoo9Wy
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !"2OcDFx nStartPos,nEndPos,i); \nkqp
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &o4L;A#& fileSplitterFetch.start(); _I{&5V~z } b%$S6. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H/)= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); A
,LAA$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", C+5^[V nEndPos = " + nFileLength); dUb(C1h // fileSplitterFetch[nPos.length-1].start(); L8bq3Q'p "%f>/k;!h. OFRzz G@ //等待子线程结束 k%In
//int count = 0; xR#hU;E} //是否结束while循环 7{<F6F^P boolean breakWhile = false; mqsf#'ri Om}&`AP}; NLz$jk%=g while(!bStop) Qs%f6rL { B|, 6m 3. write_nPos(); KL5rF,DME Utility.sleep(500); ~PlwPvWo breakWhile = true; 5I&^n0h|& [&{"1Z DN^ln%# for(int i=0;i<nStartPos.length;i++) 5V?1/ { ni%^w(J3Q if(!fileSplitterFetch.bDownOver) ;"Ot\:0 { @
K@~4! breakWhile = false; pY8+;w
EI break; <mm}IdH } ~Dy0HVE } w-\fCp ) if(breakWhile) nosEo?{ break; m};_\Db` sn Ekei|0 [dzb{M6_ //count++; ;m`I}h< //if(count>4) }kOhwT8sI // siteStop(); klch!m=d } J25>t^ (nE$};c<b2 wfZ'T#1 System.err.println("文件下载结束!"); Tu6he8Q- } p!Gf^ catch(Exception e){e.printStackTrace ();} 6@I7UL > } ^k)f oD kW,yZ.?f T|{BT!
W1E //获得文件长度 <0kRky$ public long getFileSize() (g4g-"rc { +5({~2Lzvp int nFileLength = -1; {M%"z,GL7J try{ C*78ZwZ URL url = new URL(siteInfoBean.getSSiteURL()); d>AVUf<o~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8\a)}k~4 httpConnection.setRequestProperty("User-Agent","NetFox"); -8pHjry'q sztnRX_ Mys;Il" int responseCode=httpConnection.getResponseCode(); hCo&SRC/5 if(responseCode>=400)
JI*ikco- { yNDyh processErrorCode(responseCode); lN1zfM return -2; //-2 represent access is error uY;/3?k& } /kJ*WA?J M>]%Iu \JyWKET::_ String sHeader; 5#fLGXP =x^I 5Pn 6*LU+U=` for(int i=1;;i++) qq?>ulu*W { rmhCuY?f //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); n!N;WL3k //Utility.log(in.readLine()); NFa
; sHeader=httpConnection.getHeaderFieldKey(i); *U8#'Uan if(sHeader!=null) +f7?L]wzic { w{r->Phe if(sHeader.equals("Content-Length")) %(kq Hxc { vEgJmHv; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); J}YI-t break; E""/dC:B } e6_.ID'3 } 2;&13%@! else !
\gRXP} break; We4 FR4` } vc!S{4bN } YT3QwN9 catch(IOException e){e.printStackTrace ();} .(hb8 rCM catch(Exception e){e.printStackTrace ();} &x3"Rq_ nRo`O e;pNB Utility.log(nFileLength); txgGL' DRzpV6s JA)gM return nFileLength; [n}c}% } i;tA<-$- 3jn@ [ m T4#knSIlh //保存下载信息(文件指针位置) }(],*^'u- private void write_nPos() JZv]tJWq { QO?ha'Sl try{ /9yiMmr5W output = new DataOutputStream(new FileOutputStream(tmpFile)); {&;b0'!Tf output.writeInt(nStartPos.length); L.Lt9W2fi for(int i=0;i<nStartPos.length;i++) pts}? { cp2fDn // output.writeLong(nPos); HdLkof2i output.writeLong(fileSplitterFetch.nStartPos); 7]^ } output.writeLong(fileSplitterFetch.nEndPos); U'lD|R,g } ,yqzk. output.close(); XnY}dsSO } ]_=HC5" catch(IOException e){e.printStackTrace ();} 8qc%{8 catch(Exception e){e.printStackTrace ();} (o:CxhV } ^GAdl} oy`m:Xp g:6yvEu$ - //读取保存的下载信息(文件指针位置) ^&<*$Ai~ private void read_nPos() s7
KKH
w { c%U$qao=c+ try{ 6vjB;uS[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @uE=)mP@ int nCount = input.readInt(); B~aOs>1
S] nStartPos = new long[nCount]; I[`2MKh nEndPos = new long[nCount]; !Q3Snu= for(int i=0;i<nStartPos.length;i++) %zD-gw> { UxvsSHi nStartPos = input.readLong(); b(yO nEndPos = input.readLong(); KALg6DZe: } Gu}x+hG input.close(); nSow$6T_ } ^kD?0Fm catch(IOException e){e.printStackTrace ();} ^VIUXa catch(Exception e){e.printStackTrace ();} bSR<d } &Kve vPF 4GfLS.Ip /SKr.S61e private void processErrorCode(int nErrorCode) W@C56fCa { ]p*)
PpIl System.err.println("Error Code : " + nErrorCode); :fYwFD( 9 } _Ry.Wth 6uXW`/lvX pzax~Vp //停止文件下载 tZYI{m{ public void siteStop() X@:fW @ { 9HE(*S bStop = true; G}-.xj] for(int i=0;i<nStartPos.length;i++) 4d 3Znpf fileSplitterFetch.splitterStop(); } >w Ntnmd XH *tChf< } D+)=bPMe } ._&lG3' //负责部分文件的抓取 <ut DZ#k **FileSplitterFetch.java 4ufLP DH */ q-G|@6O package NetFox; (K6`nWk2 @Y<tH,* =.X?LWKY import java.io.*; f>5RAg import java.net.*; ZQkw}3*n @."o:K IPVzV\o public class FileSplitterFetch extends Thread { BR^J y<^F' Vrj1$NL% iW}l[g8sw! String sURL; //File URL 9xQ8` 7 long nStartPos; //File Snippet Start Position 4LEE
/ long nEndPos; //File Snippet End Position NN 6KLbC( int nThreadID; //Thread's ID i
f<<lq boolean bDownOver = false; //Downing is over ]X~g@O{>_ boolean bStop = false; //Stop identical )h0E$* FileAccessI fileAccessI = null; //File Access interface LZ)m](+M oe|e+ uK:-g,; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0c61q Q6 { eM+;x\jo? this.sURL = sURL; -z0{\=@#m this.nStartPos = nStart; !NYM(6!( this.nEndPos = nEnd; gc@#O#K~h^ nThreadID = id; ?GNF=#=M fileAccessI = new FileAccessI(sName,nStartPos);//定位 "x;k'{S } n+qVT4o &fSc{/ EO&ACG public void run() tt]V$V { WQ}!]$<"y while(nStartPos < nEndPos && !bStop) = (gmd>N { eAsX?iaH Dum`o^l# bfJ`}xl(8 try{ 8q [c URL url = new URL(sURL); egvy#2b@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }=hoATs httpConnection.setRequestProperty("User-Agent","NetFox"); X^D9)kel String sProperty = "bytes="+nStartPos+"-"; 2-V)>98 httpConnection.setRequestProperty("RANGE",sProperty); ;hA7<loY Utility.log(sProperty); 7_40_kwJi 2ly,l[p8 6#)Jl InputStream input = httpConnection.getInputStream(); T_x+sv=|X! //logResponseHead(httpConnection); @qPyrgy As+;qNO N
2"3~ # byte[] b = new byte[1024]; _ML~c&9jv int nRead; |R;l5ZKvV while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^Y7 /Ow { em1cc, nStartPos += fileAccessI.write(b,0,nRead); !wd'::C //if(nThreadID == 1) T1QsW<*j // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E ;!<Z4 } *?bk?*?s =kb6xmB^t % R|"Afa= Utility.log("Thread " + nThreadID + " is over!"); e[QxFg0E bDownOver = true; )4~sQ^} //nPos = fileAccessI.write (b,0,nRead); :5S |x/ } *1W,Mzg catch(Exception e){e.printStackTrace ();} tP`G]BCbt } QM ZUt } '}Wu3X +lW}ixt {@V3?pG?p //打印回应的头信息 }xb_s public void logResponseHead(HttpURLConnection con) z,bX.*.- { g. ?*F#2 for(int i=1;;i++) TH>?Gi)" { 7wQ+giu String header=con.getHeaderFieldKey(i); xegQRc if(header!=null) t0bhXFaiE //responseHeaders.put(header,httpConnection.getHeaderField(header)); abo>_"9- Utility.log(header+" : "+con.getHeaderField(header)); ~`2&'8 else u`Z0{d break; b0YiQjS6> } nuSN)}b<Q } Ug7`ez4vw `z}vONXpAX !ww:O| 0 public void splitterStop() j /H>0^ { c6,s+^^ bStop = true; l
Io9,Ke } F#1 Kk#t 1l+kO,X] 5L-lpT8P } [0u.}c;( d&|z=%9xl v7;J%9=0D` /* ;%u_ ;,(( **FileAccess.java Dxt),4%P *//文件访问(定位,写) 2(m85/Hr\; package NetFox; RCBf;$O import java.io.*; :8^M5} _8Nw D_" ;&Bna#~B public class FileAccessI implements Serializable{ mRhd/|g* 7fju //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 +@emX$cFV RandomAccessFile oSavedFile; ME$2P!o long nPos; yo\N[h7 EBoGJ_l 7/H^<%;y public FileAccessI() throws IOException fJN*s { C.J`8@a]? this("",0); Oj4v#GK] } 4\LZD{ rv9B}%e #NvQmz?J? public FileAccessI(String sName,long nPos) throws IOException bTLMd$ { Jd5\&ma oSavedFile = new RandomAccessFile(sName,"rw"); k"xGA*B| this.nPos = nPos; {=UFk-$= oSavedFile.seek(nPos); fdlvn*H } D \N
\BD 3k#[(phk sl/=g
public synchronized int write(byte[] b,int nStart,int nLen) z Yw;q3" { U;xu/xDRi int n = -1; Y^52~[w~ try{ q#P$'7" oSavedFile.write(b,nStart,nLen); v(DwU! n = nLen; 'X =p7 d|' } )~ 0}Et l catch(IOException e) o:2Q2+d { D.'h?^kA e.printStackTrace (); JD6aiI!Su } C5P$&s\ E{tx/$f g;pR^D'M5C return n; jY7=mAd } *YWk1Cwjo 00ofHZ Btj#EoSI_ } %.mEBI=hs W'a(oI V=pMq?Nr /* TG}d3ZU
! **SiteInfoBean.java %$@1FlqX; */ .%=V">R package NetFox; F{<5aLaYti -? s&pKi 96d~~2p public class SiteInfoBean { ~h-C&G,v [J^ -LtK8wl^ private String sSiteURL; //Site's URL m9in1RI% private String sFilePath; //Saved File's Path +`@M*kd private String sFileName; //Saved File's Name j 5Qo*p private int nSplitter; //Count of Splited Downloading File {7*>Cv} ^/HW$8wEi lbQQtpEKO public SiteInfoBean() >M]6uf {//nSplitter的缺省值为5 '+j<n[JLC //default value of nSplitter is 5 _AFQ >j this("","","",5); 62) d22 } NzQ9Z1Mxy : [q0S@ ^$v3eKA public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &(EHq { j[I`\" sSiteURL= sURL; b_TS<, sFilePath = sPath; 98RKCc9h sFileName = sName; FmEc`N9\v this.nSplitter = nSpiltter; }bH$O% Q8T`wd$D# 3iRA$C-p } "13"`!m > _ <'D k|xtrW`qo; public String getSSiteURL() Y34/+Fi { G O{.9_2 return sSiteURL; *wuqa)q2 } !*aPEf270 Z\~GU*Y.e 5;\gJf public void setSSiteURL(String value) #`(WUn0H? { ]PWDE" sSiteURL = value; {ox2Tg? } M*sR3SZ
O:'?n8rWL +vW)vS[ public String getSFilePath() :w`3cwQ { l.`u5D return sFilePath; .~>?*} } j~E",7Q' K<4Kk3 }lP;U$ public void setSFilePath(String value) ljC(L/I { RBwO+J53y sFilePath = value; ]}Z4P-"t } ST5V!jz r@U3sO#N a,|?5j9,P public String getSFileName() ?m7:if+y { ujFzJdp3k return sFileName; s&a1y~rv } fpWg R4__ oR .cSGh b| M3` public void setSFileName(String value) J-xS:Ha'l { cc}Key@D sFileName = value; 7a4o1;l } <IJu7t> (xl\J/ d>0+A)6> public int getNSplitter() K4Sk+
v { 6"/WZmOp return nSplitter; $P z`$~ } ,CvG 20> <eN_1NTH_ 'sh~,+g public void setNSplitter(int nCount) j}1zdA { mYxyWB nSplitter = nCount; dq\FBwfe } 6at1bQ$ } bWWXc[O2&( vb
Y3;+M> 6e,xDr /* .IarkeCtb **Utility.java 7O5`v(<9n> */ 5U`ZbG package NetFox; /./"x~@ [AU
II*:} `B/0i A public class Utility { i;/xK=L >Dw~POMy ^3VR-u <O public Utility() /ID3s`D) { xu5ia|gYz7 NLS"eDm x5}'7,A } v+7kU= #:jb*d? //线程睡眠 {\H/y c|@ public static void sleep(int nSecond) 54lu2gD' { mw$r$C{ try{ aNcd`
$0 Thread.sleep(nSecond); S$TmZk= } M<O{O}t< catch(Exception e) Vd^g9 { E 99hlY~1: e.printStackTrace (); $YxBE`)d- } (*}yjUYLZ } S$)*&46g ^G&3sF} //日志 ^d}gpin public static void log(String sMsg) }KUd7[s { GSclK|#tE System.err.println(sMsg); q6Rr.A } q<y#pL=k"* o[oM8o< m!<i0thJ public static void log(int sMsg) m>USD?i { w(ln5q System.err.println(sMsg); <q*oV } dr)YzOvba } 6+r$t# Zl 9aDg _Zk{! /* NBl+_/2'w **TestMethod.java )?+$x[f!* */ 1b=lpw1} package NetFox; oSiMpQu08 |4$M]M f0 E_Z{6&r public class TestMethod { C~fjWz' V O~j> ? ahx>q public TestMethod() JB!:JML { ///xx/weblogic60b2_win.exe sn7AR88M; try{ |*Z$E$k: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Lg8nj< TF //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); *I}`dC[ SiteFileFetch fileFetch = new SiteFileFetch(bean);
'iLpE7 fileFetch.start(); 4tL<q_ } ~wg:!VWA) catch(Exception e){e.printStackTrace ();} X%yO5c\l2 ]7-&V-Ct* F,
U*yj } SGb;!T* mF` B# n]8<DX99Q0 public static void main(String[] args) %X#zj" { 2,ECYie^ new TestMethod(); \RNg|G } /Mb"V5S(W } %%(R@kh9 点击下载更多相关资料
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