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/* n`
M!K:Pq **SiteFileFetch.java FLUvFD */ l$/.B=] package NetFox; 2+s#5K&i import java.io.*; owQSy9Az import java.net.*; zi%Ql|zI~ 9lqH @S9^~W3G3 public class SiteFileFetch extends Thread { <<w*_GM }2%L
0 As{ "B SiteInfoBean siteInfoBean = null; //文件信息Bean QNWGUg4*& long[] nStartPos; //开始位置 5Q7Z$A1a
9 long[] nEndPos; //结束位置 h>k[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 <
#FxI long nFileLength; //文件长度 Cg_9V4h.C boolean bFirst = true; //是否第一次取文件 u'`eCrKT* boolean bStop = false; //停止标志 ;|U
!\Xp File tmpFile; //文件下载的临时信息 lV".-:u_ DataOutputStream output; //输出到文件的输出流 q]Vxf!0*> J~}sQ{ 0 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ANWfRtiU# public SiteFileFetch(SiteInfoBean bean) throws IOException '9u(9S { fQQj2>3w siteInfoBean = bean; z_f^L %J0 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); D| |)H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); FdGnNDl*e if(tmpFile.exists ()) Xrl# DN { L0.F}~S bFirst = false; {;5\ #VFg read_nPos(); Ahkq } Y]VLouzl else @B\$
me { ZSvU1T8 nStartPos = new long[bean.getNSplitter()]; 45Hbg nEndPos = new long[bean.getNSplitter()]; q\Q'9Rl0( } z94#:jPmG k:[T#/; o4U0kiI@ 8B!MgNKV } B@k2lHks( 56o(gCj?y Q2qT[aD, public void run() I
>aKa { TrPw*4h 9s //获得文件长度 WeZ?L|&%w0 //分割文件 2Q=I`H_ //实例FileSplitterFetch 'pj*6t1~ //启动FileSplitterFetch线程 >t#5eT`_ w //等待子线程返回 vN&(__3(( try{ ;oCSKY4 if(bFirst) C <Pd_& { #$X _,+<HZ nFileLength = getFileSize(); v`hn9O if(nFileLength == -1) Cz|F%>y# { x7GYWK
9 System.err.println("File Length is not known!"); ]w0_!Z& } s}q tM.^W else if(nFileLength == -2) p~WX\; { "^Vnnb:Z*o System.err.println("File is not access!"); ~jJF&*) } /%1-tGh else *b7evU *1 { % oJH 6F for(int i=0;i<nStartPos.length;i++) K;7ea47m N { {X5G nStartPos = (long)(i*(nFileLength/nStartPos.length)); @>*r2=#14 } `y>BbJqy for(int i=0;i<nEndPos.length-1;i++) &$bcB]C\3 { '>cZ7: nEndPos = nStartPos[i+1]; O1Ynl`} } }Gva=N: nEndPos[nEndPos.length-1] = nFileLength; h0] bIT{ } \
[bJ@f*." } .B?fG)'WsF cHC1l l6-
n{zG //启动子线程 ^+w1:C 5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v:"Y for(int i=0;i<nStartPos.length;i++) l}@C'Np { 3aw-fuuIb fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9^7z"*@# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4k!>JQor nStartPos,nEndPos,i); WCY5F Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); T9FGuit9 fileSplitterFetch.start(); 2y IDyo } ;o158H$gz; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [>LO'}% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); iUbcvF3aP // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", iD.p KG nEndPos = " + nFileLength); cx[[K. // fileSplitterFetch[nPos.length-1].start(); xFcW%m>9C ):\+%v^ }{}?mQ //等待子线程结束 wbB\~*Z) //int count = 0; e=+q*]> //是否结束while循环 :w]NN\ boolean breakWhile = false; %Z8wUG T|p%4hH 1{Ik.O) while(!bStop) l{QlJ>%~{; { BCO (,k write_nPos(); m2HO .ljc Utility.sleep(500); OaKr_m breakWhile = true; tkQrxa| oT|:gih5 @~&|BvK% \ for(int i=0;i<nStartPos.length;i++) M< H+$}[ { 'U,\5jj'Y if(!fileSplitterFetch.bDownOver) 558!?kx$ { sf
O{.#5< breakWhile = false; ]E.\ |I( break; FE1'MUT_ } Y.q$"lm7k } F-XMy>9 if(breakWhile) XZ2 ji_D break; w\M"9T fZ(k"*\MZ cT@H49#uB //count++; K#Xl)h}y7 //if(count>4) O;$}j:;KF // siteStop(); p0D@O_
:5 } |9Y~k,rF y7,t"XV Kpkpr`:)] System.err.println("文件下载结束!"); 9VMk? } &;RBG$t catch(Exception e){e.printStackTrace ();} @YVla!5O@ } (G~M E> H6Ytp^~> _0y]U];ce //获得文件长度 dGUiMix{N public long getFileSize() \~r_S { 8?rq{&$t int nFileLength = -1; e:K'e2 try{ 0$i\/W+ URL url = new URL(siteInfoBean.getSSiteURL()); OnyAM{$g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); T+PERz( httpConnection.setRequestProperty("User-Agent","NetFox"); `4e| I.`^r Y5y7ONcn ix38|G9U int responseCode=httpConnection.getResponseCode(); qeC^e}h if(responseCode>=400) ~i.rk#{?D { EN__C$ processErrorCode(responseCode); KpIY>k return -2; //-2 represent access is error fm$Qd^E|e } (w`_{%T a5(9~.9 11Uu5e!. String sHeader; pU<GI@gU S~W;Ld<>fB efuiFN; for(int i=1;;i++) AF,;3G { wc#k@"2AZb //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r*ziO#[ //Utility.log(in.readLine()); 2km0 sHeader=httpConnection.getHeaderFieldKey(i); TxH
amI l if(sHeader!=null) og_ylCh: { : rudo[L if(sHeader.equals("Content-Length")) 'UTMEN& { nGsFt. nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); JE# H&]
break; =@&>r5W1 } s@g _F } 7#N
?{3i else "Xl"H/3r break; jAovzZ6BL } %zR5q Lb } [;l;kom catch(IOException e){e.printStackTrace ();} 3#aLCpVla catch(Exception e){e.printStackTrace ();} ^5)=)xVF {E}D6`{ ~fs}
J Utility.log(nFileLength); #ApmJLeCO 4;(W0RQa CtUAbR return nFileLength; 9?^0pR p } ]AZCf`7/? 6G(K8Q{> 9ph>4u(R //保存下载信息(文件指针位置) (4IP&^j:\ private void write_nPos() $@w,9J\ { ^E)8Sb9t try{ zn0%%x+!g output = new DataOutputStream(new FileOutputStream(tmpFile)); oTr,zRL output.writeInt(nStartPos.length); CYsLyk for(int i=0;i<nStartPos.length;i++) %s ;5 { EpTc{ // output.writeLong(nPos); o5YL_=7m output.writeLong(fileSplitterFetch.nStartPos); j3S!uA?
output.writeLong(fileSplitterFetch.nEndPos); ?T,a(m<i{ } ~mZ[@Z output.close(); fhha-J } YgtW(j[ catch(IOException e){e.printStackTrace ();} O>i]*V catch(Exception e){e.printStackTrace ();} b?<@ } f3s4aARP vbtjPse eT?vZH[N //读取保存的下载信息(文件指针位置) sQ&<cBs2 private void read_nPos() C0khG9,BL { 7W+{U02O try{ :G=ol2Q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); e&K7n@ int nCount = input.readInt(); r1z+yx nStartPos = new long[nCount]; p^Z|$aZZ nEndPos = new long[nCount]; [.$/o} for(int i=0;i<nStartPos.length;i++) p9!jM\( { A;e"_$yt8 nStartPos = input.readLong(); `=kiqF2P} nEndPos = input.readLong(); I]cZcx,<q } #Fgybokm input.close(); 2Ky|+s[`[ } {bC(>k|CQ catch(IOException e){e.printStackTrace ();} P,7R/-u 5D catch(Exception e){e.printStackTrace ();} jF(R;?, } ]vw%J ^7:a p _2Y c]8 uTdz$Nh private void processErrorCode(int nErrorCode) 7.+vp@+ { {IF$\{Al System.err.println("Error Code : " + nErrorCode); QHsJo|. } cV7a, * BqavI&1= AbQnx%$u //停止文件下载 Fr<tk^~/ public void siteStop() 0d89>UB-8q { H> n;[ bStop = true; |Qpd<L for(int i=0;i<nStartPos.length;i++) g6$\i
m fileSplitterFetch.splitterStop(); _s:5) hVCxwTg^X e?\hz\^ } rKTc6h:) } y>cT{ )E$ //负责部分文件的抓取 X|4Kdi.r@ **FileSplitterFetch.java B->oTC`5 */ &KV$x3 package NetFox; B- |C%~fe DD6K[\ 6aWNLJ@ import java.io.*; V<U9Pj^?^ import java.net.*; q AsTiT6r `'9t^6mk cKIA.c}N public class FileSplitterFetch extends Thread { n:}'f-
:T er@.<Dc l=a<=i String sURL; //File URL hn$jI5*` long nStartPos; //File Snippet Start Position /8,cF7XL* long nEndPos; //File Snippet End Position II\}84U2
. int nThreadID; //Thread's ID ?9T,sX: boolean bDownOver = false; //Downing is over :#UA!|nV boolean bStop = false; //Stop identical M?DXCsZ,)s FileAccessI fileAccessI = null; //File Access interface G*-7}7OAs
BDX>J3h UI wTf2B public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException a!&m\+? { |T*t3} this.sURL = sURL; dd@
D
s this.nStartPos = nStart; vtzbF1?O this.nEndPos = nEnd; 6rlM\k@! nThreadID = id; b86c[2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;Wn0-`_1, } y+7A?"s) "rrE_ iE]^6i public void run() I@1VX5 { :Yi 4Ia while(nStartPos < nEndPos && !bStop) H.O&seY { y#nyH0U Nig)!4CG 7!e kINQ try{ /g!X[rn7Q URL url = new URL(sURL); !1<>][F HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JP]-a!5Ru httpConnection.setRequestProperty("User-Agent","NetFox"); 8vj]S5 String sProperty = "bytes="+nStartPos+"-"; m'2EiYX$}\ httpConnection.setRequestProperty("RANGE",sProperty); )-i (%;,*e Utility.log(sProperty); #BI6+rfv| , lBHA+@ }dEf |6_ InputStream input = httpConnection.getInputStream(); Slp_o\s$@ //logResponseHead(httpConnection); `Tr !Gj_ %.:]4jhk 3B4C@ { byte[] b = new byte[1024]; i}C%`1+( int nRead; zB6&),[,v while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9"dZ4{\! { ,!98VJmr nStartPos += fileAccessI.write(b,0,nRead); bGik~ //if(nThreadID == 1) .0dx@Sbv // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F[X;A\ } ALKzR433/ c}2"X, )2F%^<gZ# Utility.log("Thread " + nThreadID + " is over!"); hM8FN bDownOver = true; |W SvAM3 //nPos = fileAccessI.write (b,0,nRead); ?u{D-by%& } P_Exh]P catch(Exception e){e.printStackTrace ();} F&OcI.OTXF } ]/Cu,mX } 2'?C ` yM9XjEl> ?cD_\~ //打印回应的头信息 "@itn public void logResponseHead(HttpURLConnection con) nwJc%0 { ?Lr:> for(int i=1;;i++) l YjPrA]TC { KwxJ{$|xH String header=con.getHeaderFieldKey(i); )u307Lg if(header!=null) +4k4z:<n //responseHeaders.put(header,httpConnection.getHeaderField(header)); ?T>N vKF Utility.log(header+" : "+con.getHeaderField(header)); }G<A$*L1 else T>v`UN Bl] break; }vW3<|z } (y2P." } mXUe/*r0T &G7@lz@sK+ eS2VLVxu public void splitterStop() 9YwS"~Q =w { =jvN8R*[ bStop = true; q94*2@KV } 2VkA!o4nP K$-|7tJon 22D,,nC0+= } B_0]$D0
^ ?xo<Fv ZIaFvm&q7Z /* u6/;=]0
**FileAccess.java R)9FXz$). *//文件访问(定位,写) >fgV!o4 package NetFox; wM#q [m; import java.io.*; _;k))K^ Le,+jm ~h444Hp= public class FileAccessI implements Serializable{ \3cg\Q+~ OLDEB.@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UG,n
q RandomAccessFile oSavedFile; 1i$OcN?x% long nPos; TK#-;p_ Oz.Zxw \LDcIK= public FileAccessI() throws IOException oX[I4i%G { (9!kKMQW' this("",0); :$oi P } s *<T5Z `wNJ*` i$4lBy_2 public FileAccessI(String sName,long nPos) throws IOException q<A,S8'm { 7x`4P|Uu oSavedFile = new RandomAccessFile(sName,"rw"); ,+RoJwi m this.nPos = nPos; 2$oGy oSavedFile.seek(nPos); CIf""gL9 } Xd9<`gu W7
9.,# Bqb3[^;~ public synchronized int write(byte[] b,int nStart,int nLen) M,N(be- { $dHD int n = -1; SwmX_F#_ try{ +,bgOq\aG oSavedFile.write(b,nStart,nLen); p9iCrqi n = nLen; _ 4+=S)$ } ] Oe[;<I catch(IOException e) m{0u+obi&w { JT 5+d , e.printStackTrace (); e
irRAU } n/GJ&qLi:g
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return n; }i2dXC/ } SlUt&+) s&qr2'F+z &bS!>_9 } TWTRMc;z+ IN94[yW{1 ~7&O[ /* y1hJVYE2 **SiteInfoBean.java ki|w?0s */ j_~lc,+m package NetFox; '#x<Fo~hT Q$DF3[NC MYeGr3V3 public class SiteInfoBean { c9;oB|8| gc{5/U9H* Dv+:d 4|" private String sSiteURL; //Site's URL `z3"zso private String sFilePath; //Saved File's Path BcD%`vGJ private String sFileName; //Saved File's Name e\>g@xE% private int nSplitter; //Count of Splited Downloading File 2E}^'o =;HmU.Uek% +v'n[xa1v public SiteInfoBean() `pd1'5Hm {//nSplitter的缺省值为5 ;V3d"@R, //default value of nSplitter is 5 `o!a
RX this("","","",5); +)K yG } 1Du9N[2'P b1qli5 jRIm_) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) p h=[|P) { 4WV)&50 sSiteURL= sURL;
) XHcrm& sFilePath = sPath; _i{4 4zE sFileName = sName; VR0#" this.nSplitter = nSpiltter; t~"DQqE ]6 {\`a E.~~.2
} uu582%tiG B 9AE* W4(O2RU public String getSSiteURL() [u2)kH$ { {01wW1 return sSiteURL; ihdtq } b`sph%& >jDx-H.N S=~8nr/V public void setSSiteURL(String value) bwAL: { mF !=H% sSiteURL = value; CiGN?1| } 3
,?==? Aw *:5 I[ k)R>5?_ public String getSFilePath() c F(]`49( { JP<Z3
A2q return sFilePath; ~0>{PD$@ } <=,KP) >h
m<$3
wc'K=;c public void setSFilePath(String value) lCyp&b#(L { XL7jUi_4:L sFilePath = value; n`hes_{,g } s~6irf/ L"6@3 kY6))9 O public String getSFileName() -m~[z { e?D,=A4mV" return sFileName; D0&{iZ( } z[wk-a+w Kv:ih=? Zb7:qe<UN public void setSFileName(String value) aJ Du_ { RFu]vFff sFileName = value; c!%:f^7g } 'HV}Tr o*u A+7n ,uP1U@Cas public int getNSplitter() AcF;5h { G#4cWn' return nSplitter; `&U ['_% } gU}?Yy 7M1*SC T<0Bq"'% public void setNSplitter(int nCount) :q4Mnr { "zO+!h'o nSplitter = nCount; i4"xvLK4 } FBPT@`~v } | JL47FR ]eq3cwR[| \0pJ+@\T9 /* .j4IW3) **Utility.java 5aTyM_x */ O ,[aL;v package NetFox; X3Vpxtb w`VmN}pR y o[!q|z public class Utility { |[TH
~o sh?Dxodp9 V@K}'f~ public Utility() x9HA^Rj4- { &w3LMOT 8X]j;Rb z@ A5t4+3 } q6{ %vd )x"Z$ jIs //线程睡眠 H2RNekck public static void sleep(int nSecond) ,Fg&<Be}Jx { 0r=Lilu{q try{ y\@;s?QL Thread.sleep(nSecond); ASaG }h } !U/:!e`N catch(Exception e) (.!q~G { N1(}3O e.printStackTrace (); SJ7>*Sa(u$ } Z-H Kdv!d } u6jJf@!ws (s{%XB:K //日志 Af0E_ public static void log(String sMsg) a@,tf'Sr { Zk}e?Grc System.err.println(sMsg); ?#D@e5Wf } Z#;ieI\ e= "/oo a+mq=K public static void log(int sMsg) lLtC9: { ^O\tN\g;c System.err.println(sMsg); aM.l+DP } foE2rV/Y } O,JthlAV4 =OO_TPEZ kZGhE2np /* r:Cad0xj;^ **TestMethod.java Q:VD2<2 */ ,bmTBZV package NetFox; a$t [}D2 nhXa&Nro rmQGzQnun public class TestMethod { /yrR
f;}<O x_Ais&Gc iJrscy- public TestMethod() o
ohf)) { ///xx/weblogic60b2_win.exe +bf%]
try{ |klL KX& SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); pdnL~sv //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N'm:V SiteFileFetch fileFetch = new SiteFileFetch(bean); PLo.q|% fileFetch.start(); Z*]n]eS } _TQt!Re`, catch(Exception e){e.printStackTrace ();} ~?b(2gn sQihyq6U; J;q3
fa } ]P<&CEk /e{Oqhf[n ( v
~/glf public static void main(String[] args) 4N` MY8', { #2HygS new TestMethod(); aeBth{ } 1NOz $fW } 'OX6eY5 点击下载更多相关资料
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