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/* Ix1ec^?f **SiteFileFetch.java J0o U5d=3 */ Hb!Q}V+Kb8 package NetFox; 2uiiTg> import java.io.*; ;&JMBn]J import java.net.*; J8/>b{Y :,GsbNKW nM
R_ ?g public class SiteFileFetch extends Thread { !aLByMA '|WMt g $t}L|"=8X SiteInfoBean siteInfoBean = null; //文件信息Bean 8&`s wu& long[] nStartPos; //开始位置 xo^_;(; long[] nEndPos; //结束位置 <`6-J `. FileSplitterFetch[] fileSplitterFetch; //子线程对象 joM98H@ long nFileLength; //文件长度 K;[V`)d' boolean bFirst = true; //是否第一次取文件 K")-P9I6-f boolean bStop = false; //停止标志 Jc{zi^)(EN File tmpFile; //文件下载的临时信息 8)R)h/E> DataOutputStream output; //输出到文件的输出流 b3Y9 z %mM#X //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) sjShm public SiteFileFetch(SiteInfoBean bean) throws IOException %9Ulgs8 = { 7p u*/W~ siteInfoBean = bean; FUq@
dUv //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +twBFhS7k tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ?+`Zef.g if(tmpFile.exists ()) 3z~zcQ^\ { hr]NW>; bFirst = false; 1iF
|t5>e read_nPos(); N;Hf7K } 1*>a else .HGEddcC { hQ<" nStartPos = new long[bean.getNSplitter()]; XPWK"t01 nEndPos = new long[bean.getNSplitter()]; mYa0_P%^ } We9C9)0 HnOp*FP ''f
A:NsDEt } 7cvbYP\<lv sVh!5fby& $7|0{Dw public void run() B;G|2um:$ { {#Gr=iv~N //获得文件长度 `[o^w(l:5@ //分割文件 tYmWze.j //实例FileSplitterFetch S~Nx;sB //启动FileSplitterFetch线程 <niHJ* //等待子线程返回 '%K,A-7W try{ %li'j| if(bFirst) <([o4% { u!{P{C nFileLength = getFileSize(); q;B-np?U if(nFileLength == -1) '1.T-.4>& { TS=p8@w} System.err.println("File Length is not known!"); 6Y}#vZ } _Vp9Y:mX2 else if(nFileLength == -2) LZ\}Kgi(!T { ~>#=$#V System.err.println("File is not access!"); :Q&8DC#] } T(3"bS., else eeB^c/k(P { OBb for(int i=0;i<nStartPos.length;i++) ,h> 0k`J:a { 6aMqU?- nStartPos = (long)(i*(nFileLength/nStartPos.length)); U_M > Q_r( } o*r\&!NIw for(int i=0;i<nEndPos.length-1;i++) v?d~H`L { chfj|Ce]x nEndPos = nStartPos[i+1]; $ n
7dIE } i]F,Y;&| nEndPos[nEndPos.length-1] = nFileLength; /=Q7RJ@P } :LcR<>LZ } i~l0XjQbs Lxd*W2$3_ ULQ*cW&;? //启动子线程 2}509X(* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; P8;|>OLZ) for(int i=0;i<nStartPos.length;i++) )+cP8$n6L { 2/>AmVM fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,v)@&1Wh: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), SjG=H% nStartPos,nEndPos,i); {\lu; b! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4[+n;OI fileSplitterFetch.start(); -?'u"*#1, } vco:6Ab$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )v
['p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); O]lWaiR` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P9Rq'u nEndPos = " + nFileLength); T7!a@ // fileSplitterFetch[nPos.length-1].start(); |\N[EM%.@ .c~;/@{ *"1]NAz+ //等待子线程结束 c%i/ '<Afr //int count = 0; 2r[Q$GPM< //是否结束while循环 D97oS!* boolean breakWhile = false; SDdK5@1O4o ?c=l"\^x f]o DZO%^ while(!bStop) O!/J2SfuDH { bO^%#<7 write_nPos(); {-<h5_h@ Utility.sleep(500); <7)Vj*VxC breakWhile = true; [ &R-YQ@ rj<%_d'Z` 0)9GkHVu( for(int i=0;i<nStartPos.length;i++) uX`Jc:1q3 { Cw Z{& if(!fileSplitterFetch.bDownOver) yUEUIPL { {b]WLBy breakWhile = false; \]y$[\F> break; VbA#D 4; } 9{ciD
"!&V } Ep?a1&b if(breakWhile) qj/ 66ak break; Ct"h.rD ] 1Pn!{ bU3@ ;~/ //count++; yUNl)E //if(count>4) vxbO>c // siteStop(); Ct
#hl8b: } !BK^5,4?-- %&e5i p3sz32RX System.err.println("文件下载结束!"); a>""MC2 } h2uO+qEsu catch(Exception e){e.printStackTrace ();} x ?Q;o+2v } Wq"pKI#x ap_(/W SznNvd < //获得文件长度 ^@L public long getFileSize() B;?a. 81~ { $,'r}
% int nFileLength = -1; I#$u(2.H try{ CIYD'zR[2 URL url = new URL(siteInfoBean.getSSiteURL()); ]iPTB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _0Wdm* httpConnection.setRequestProperty("User-Agent","NetFox"); EeL~`$f !~>u\h qK(?\t$ int responseCode=httpConnection.getResponseCode(); ` LU&]NS3 if(responseCode>=400) t{x&|%u { dd98vVj processErrorCode(responseCode); yK [~(!c5 return -2; //-2 represent access is error tJ'U<s } .@ 1\26< PJkEBdM. o7hjx hmC String sHeader; ^"*r' {Ivu"<`L3 ~EX/IIa{ for(int i=1;;i++) B4U+q|OD# { dL[mX .j" //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5r`g6@ //Utility.log(in.readLine()); }ZR3 sHeader=httpConnection.getHeaderFieldKey(i); gzl_
"j if(sHeader!=null) mufF_e) { Z\LW<**b if(sHeader.equals("Content-Length")) #gi&pR'$ { W;Fcp nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); u~a<Psp&| break; 'nW:2(J } `?`\!uP" } 97<Y.
0 else w[]7{D]; break; +O\6p } U_oMR$/Z } =`.9 V< catch(IOException e){e.printStackTrace ();} Nu|?s- catch(Exception e){e.printStackTrace ();} 9>[$;> 6VCw>x vgsu~(L; Utility.log(nFileLength); o5AyJuS-u$ ]]9eUw= njvmf*A?S return nFileLength; 'B6D&xn'%& } wGb{O s)_sLt8? 9SMM%(3, r //保存下载信息(文件指针位置) @I_A(cr private void write_nPos() Etn]e;z4 { HLTz|P0JZ try{ 2Ni2Gkf@
output = new DataOutputStream(new FileOutputStream(tmpFile)); |V:k8Ab output.writeInt(nStartPos.length); h*d&2>"0m? for(int i=0;i<nStartPos.length;i++) }2JSa8 { \XmtSfFC // output.writeLong(nPos); MqXA8D output.writeLong(fileSplitterFetch.nStartPos); rd. "mG. output.writeLong(fileSplitterFetch.nEndPos); Q:@Y/4= } va#~ \%` output.close(); %qN8uQx } p2w/jJMD catch(IOException e){e.printStackTrace ();} GawLQst[+ catch(Exception e){e.printStackTrace ();} ZLo3
0* } sveFxI &Sc0l/ "T#c#? //读取保存的下载信息(文件指针位置) h`Y t4-Y private void read_nPos() ?Yz.tg { eN,m8A`/S try{ (Tc ~ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1!BV]&,[ int nCount = input.readInt(); w;{k\=W3Ff nStartPos = new long[nCount]; scN}eg:5 nEndPos = new long[nCount]; 2lXsD;[ for(int i=0;i<nStartPos.length;i++) "52wa<MVJ { pOw4H67 nStartPos = input.readLong(); }]tSWVb* nEndPos = input.readLong(); 0H;dA1 } =XudL^GF input.close(); Awe\KJ^` } WET $H, catch(IOException e){e.printStackTrace ();} 5%,n[qj4IT catch(Exception e){e.printStackTrace ();} o<T>G{XYB } dI'C[.zp[ e`8z1r gY;N>Yq,C private void processErrorCode(int nErrorCode) e#&[4 tQF { := *>:*.Kb System.err.println("Error Code : " + nErrorCode); ;?%2dv2d } Q;5aM%a` &[JI L=m5 b@5&<V;r2 //停止文件下载 vJXd{iQE@C public void siteStop() L'z?M]
{ r}03&h~Hc& bStop = true; QT^(
oog= for(int i=0;i<nStartPos.length;i++) I]ywO4 fileSplitterFetch.splitterStop(); ]:]2f9y )mwY]
! nef-xxXC^I } 7|65;jm+ } uA\A4 //负责部分文件的抓取 O(WFjmHx **FileSplitterFetch.java UDuKG\_J<y */ WDgp(Av! package NetFox; nE::9Yh8z QR79^A@5 &tp5y}=n import java.io.*; $#"}g#u import java.net.*; zz02F+H$Y Zad+)~@!tq | %6B#uy public class FileSplitterFetch extends Thread { yf_<o xp><7{ ?55('+{l String sURL; //File URL }R}tIC-: long nStartPos; //File Snippet Start Position HQ2in_' long nEndPos; //File Snippet End Position F fl`;M int nThreadID; //Thread's ID C8NbxP boolean bDownOver = false; //Downing is over yHT}rRS8 boolean bStop = false; //Stop identical c WK@O> FileAccessI fileAccessI = null; //File Access interface \U~ggg0h VO++(G) zA-?x1th& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException t"RgEH@ { X2sK<Qluql this.sURL = sURL; zA( 2+e 7 this.nStartPos = nStart; {"4t`dM this.nEndPos = nEnd; gxt2Mq;q~} nThreadID = id; AS4m227 fileAccessI = new FileAccessI(sName,nStartPos);//定位 a$;+-Y } $Q]`+:g*} 7e}p:Vfp x2|DI)J1' public void run() r@s, cCK9? { ]l+2Ca:-[j while(nStartPos < nEndPos && !bStop) 0r+-}5aSl5 { y0A2{'w Z AZQFr'* \k;raQR4t* try{ P+"#xH URL url = new URL(sURL); Xb6@;G" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vs6`oW"{# httpConnection.setRequestProperty("User-Agent","NetFox"); EXb{/4 String sProperty = "bytes="+nStartPos+"-"; %y8w9aGt httpConnection.setRequestProperty("RANGE",sProperty); zU1rjhv+ Utility.log(sProperty); QHtpCNTVb ,wZ[Y
3 xB9^DURr\ InputStream input = httpConnection.getInputStream(); R<JI //logResponseHead(httpConnection); Hi.JL = ng\ 5<d
Y,FvX byte[] b = new byte[1024]; e(!a~{(kq% int nRead; mHw1n=B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;Oe6SNquT { hM>xe8yE nStartPos += fileAccessI.write(b,0,nRead); vuw1ycy) //if(nThreadID == 1) |fRajuA; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )xTp7YnZ; } Vvv
-f }8x[ Ep0Aogp29 Utility.log("Thread " + nThreadID + " is over!"); N} Q, bDownOver = true; C-4I
e
//nPos = fileAccessI.write (b,0,nRead); sU+~#K$b } }14.u&4 catch(Exception e){e.printStackTrace ();} ]G|@F
: } >E)UmO{S } u45e>F= V|b?H6Q \a|gzC1G //打印回应的头信息 YK"({Z>U public void logResponseHead(HttpURLConnection con) ZO0_:T#Z { _KD(V2W for(int i=1;;i++) ijoR(R^r { R`s /^0 String header=con.getHeaderFieldKey(i); )NyGV!Zuu if(header!=null) t'[vN~I' //responseHeaders.put(header,httpConnection.getHeaderField(header)); JziMjR Utility.log(header+" : "+con.getHeaderField(header)); U/jJ@8 else QW~o+N~~ break; N#ex2c } EH4WR/x } :_^9.` _Zb_9& '| Ag,x[ public void splitterStop() sy>P n { FK
mFjqY bStop = true; %\5y6 } eZg31. b[BSUdCB G%'h'AV" } ]=]'*Z% -,XS2[ %iJ6;V4 /* r-[z!S
**FileAccess.java (<8T*Xo *//文件访问(定位,写) aIqNNR package NetFox; dIM:U:c import java.io.*; 7&HP2r HjV^6oP y{jv-&!xB public class FileAccessI implements Serializable{ )03.6Pvs O`@$YXuD //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b*p,s9k7 RandomAccessFile oSavedFile; av`b8cGg long nPos; zb;2xTH+ ;q$<]X_S)} $xloB public FileAccessI() throws IOException <`MHra8 { >6<g5ps.n this("",0); J^t=.-a| } ^g~-$ t<! e=2;z Ulktd^A\ public FileAccessI(String sName,long nPos) throws IOException Dq-h`lh!D# { =Oo*7|Z oSavedFile = new RandomAccessFile(sName,"rw"); A;Zg: this.nPos = nPos; JaIj9KLNX oSavedFile.seek(nPos); L`"cu.l } f_z2d+ czHO)uQ?d` G~m(&,:Mu public synchronized int write(byte[] b,int nStart,int nLen) 59EAqz[: { <@zOdW|{: int n = -1; Gjv'$O2_ try{ \Dt0
}
?;k oSavedFile.write(b,nStart,nLen); % yJs"% n = nLen; ShSh/0
} 6qHo$#iT catch(IOException e) 9k83wACry { # ^%'*/z e.printStackTrace (); MhJ`>.z1
} Z2
t0l% F92n)*[ q<;9!2py
return n; kdoE)C } wvUph[j}J <-lz_ `ZNjA},. } j" YJ1R-5 Q
|l93Rb` lGcHfW)Y /* $*2uI?87}: **SiteInfoBean.java x#ouR+< */ Ebq5P$ package NetFox; ]-ZD;kOr y:W$~<E`p g`1*p| public class SiteInfoBean { `NGCUGQ_7 4!monaB"e 6
#QS5 private String sSiteURL; //Site's URL ?=PQQx2_*u private String sFilePath; //Saved File's Path
YemOP9 private String sFileName; //Saved File's Name {8UBxFIM( private int nSplitter; //Count of Splited Downloading File ^U`[P@T 0<^K0>lm
p "ENgu/A! public SiteInfoBean() Ay2|@1e {//nSplitter的缺省值为5 *1elUI2Rg //default value of nSplitter is 5 Duz}e80 this("","","",5); >iG` } xy|;WB 63k8j[$ gbI0?G6XN/ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) C6/,-?%) { x^C,xP[#Y; sSiteURL= sURL; ^ qE4:|e sFilePath = sPath; 31bKgU{ sFileName = sName; "@Te!.~A. this.nSplitter = nSpiltter; k_y@vW3 {&2$1p/9' O:u^jcXA } <89js87 \x|(`;{ g/Qr]:; public String getSSiteURL() kvo741RO6 { kmP0gT{Sj return sSiteURL; 0TVO'$Gvi } H9 't;Do |5Z@7 ff{ESFtD public void setSSiteURL(String value) `T~M:\^D { ^:DlrI$ sSiteURL = value; -
+>~ } 9g 2x+@5T^ =fRP9`y -`Z5#8P public String getSFilePath()
xXHz)w { op"Cc return sFilePath; }uZhoA } hL8QA! q Rtgk .[CXW2k public void setSFilePath(String value) O?{pln { ||/noUK sFilePath = value; QtX ->6P> } n*-#VKK^ U2SxRFs >
HPU7
` b4 public String getSFileName() 7dW9i7Aj { ) d\Se9! return sFileName; dnN" } 0gt/JI($ H:0-.a^ZS )6!SFj>.O public void setSFileName(String value) OBj.-jL { snN1 sFileName = value; g *^"x& } N\xqy-L9 D* Vr)J *y`^Fc public int getNSplitter() Z\@vN[[ { xat)9Yb}0 return nSplitter; 3xj<ATSe } 9K)OQDv%6D |e+I5 2-{8+*_' public void setNSplitter(int nCount) 8n2*z { LkNfcBa_ nSplitter = nCount; Mu{mj4Y{ } (:@qn+
a } 2{{M{#}S. C~6aX/: [*50Ng>P` /* b7"pm)6 **Utility.java SHhg&~B */ A
#ZaXu/:X package NetFox; "\>
<UJ a{]1H4+bQ hBN!!a|l public class Utility { Iy e `~*qjA LsBDfp5/ public Utility() drN^-e { 8zZR%fZ lOZ.{0{f, A0&~U0*(~ } ~;U!? &_!BMzp4 //线程睡眠 >~XX'} public static void sleep(int nSecond) '+-R 7# { >Z>*Iz,LP try{ #7'ww*+ Thread.sleep(nSecond); W+1V&a}E } S0"OU0`N catch(Exception e) ts)0+x { :X@;XEol~ e.printStackTrace (); "I_3!Yu } '!En,*'IS } "jAV7lP 7E|0'PPR //日志 (&X"~:nm2 public static void log(String sMsg) GK\'m@k { } #%sI"9 System.err.println(sMsg); pY-izML } |nocz]yU$ E<~/AReo a}e7Q<cGj public static void log(int sMsg) 0Z9jlwcQ { +F 5 Dc System.err.println(sMsg); (<1DPpy95O } {|>~#a49h } 12cfqIo9 1w\Y._jK /\Q{i#v /* W%Um:C\I **TestMethod.java h2,AcM */ d6(qc< /!r package NetFox; IO,kP`Wcx 36lIV,YnU m,=$a\UC public class TestMethod { yP[GU| >( o@;w!' R_Eu*Quj public TestMethod() zSkM8LM2 { ///xx/weblogic60b2_win.exe z.[L1AGa|s try{ wX|]8f2Z SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >)5rOU //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _+^3<MT SiteFileFetch fileFetch = new SiteFileFetch(bean); 4N#0w]_,>Y fileFetch.start(); 6x -PGq } 5X~ko> catch(Exception e){e.printStackTrace ();} V&GFGds )P|Ql-rE4 ]kc_wFT< } BRH:5h 8N|*n"`} u,oxUySeG public static void main(String[] args) `cZG&R { Jr1^qY`0+ new TestMethod(); FRfMtxvU } s$Roe(J } >A1Yn]k 点击下载更多相关资料
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