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/* Nm):9YQ/ **SiteFileFetch.java m0{ !hF[^ */ 1
y}2+Kk package NetFox; ( )sTb>L import java.io.*; JY!l!xH(6 import java.net.*; tRpEF2 %zU`XVNN+ =uDgzdDyE public class SiteFileFetch extends Thread { -*2Mf Mh &_5tqh c#N<"cy> SiteInfoBean siteInfoBean = null; //文件信息Bean _lW+>xQ long[] nStartPos; //开始位置 !EQ@#qW/ long[] nEndPos; //结束位置 3sCFHn#c FileSplitterFetch[] fileSplitterFetch; //子线程对象 5X.e*; long nFileLength; //文件长度 fJZp?e" boolean bFirst = true; //是否第一次取文件 0b91y3R+ boolean bStop = false; //停止标志 (Toq^+`c File tmpFile; //文件下载的临时信息 d*pF> j DataOutputStream output; //输出到文件的输出流 wB>r(xQ' L!_ZY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;v public SiteFileFetch(SiteInfoBean bean) throws IOException ;V<iL? { DP/J(>eG siteInfoBean = bean;
$hxNhI //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }bU8G ' tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); /MQU
>& if(tmpFile.exists ()) *Ywpz^2?: { T!W~n
ZC bFirst = false; R_sC! - read_nPos(); 2wqk,c[] } .lhn;*Yi else ^[Cv26 { ~7!7\i,Y8\ nStartPos = new long[bean.getNSplitter()]; v&FF|)$ nEndPos = new long[bean.getNSplitter()]; yk2 !8 } 97!>%d[0 W(fr<<hL l8K5k:XCU3 27ckdyQx } >MJ?g- I|$
RJkD }B7K@Wu# public void run() G1 o70 { ^7]"kg DA //获得文件长度 *=Z26 //分割文件
QH]M //实例FileSplitterFetch hl&-\ dc+ //启动FileSplitterFetch线程 g/=K. //等待子线程返回 }Vu\(~ try{ (SVWdgb if(bFirst) -oz`"&% { ]<DNo&fw nFileLength = getFileSize(); 9]$8MY if(nFileLength == -1) ,D6v4<jh { ')S;[= v System.err.println("File Length is not known!"); vhr+g 'tf } 6{d6s#|% else if(nFileLength == -2) 5W
=(+Q>C { B@Nt`ky0* System.err.println("File is not access!"); &p<(_|Af } BcA31% else +5v}q.:+ { PZ8U6K' for(int i=0;i<nStartPos.length;i++) xr(|* { q^rl) nStartPos = (long)(i*(nFileLength/nStartPos.length)); k&hc m } AgF5-tz6x for(int i=0;i<nEndPos.length-1;i++) +)nT|w45 { !\[+99F# nEndPos = nStartPos[i+1]; ~`Qko-a& } M^rM-{?< nEndPos[nEndPos.length-1] = nFileLength; _nT{g } 3-40'$lE } Y^"4?96 m8+(%>+7 *5%*|> //启动子线程 D}Ilyk_uUw fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; [-*F"}D, for(int i=0;i<nStartPos.length;i++) ~#:e *:ro { lhC6S'vq fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jn9 ShF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~c{:DM nStartPos,nEndPos,i); cd;NpN Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h$C@j~ fileSplitterFetch.start(); DJhb } u"$a>S_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0BkV/v1Uc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); r0m)j // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5CJZw3q nEndPos = " + nFileLength); vd#,DU=p! // fileSplitterFetch[nPos.length-1].start(); 2>S~I"o0 -'rj&x{Q)U ")s!L"x //等待子线程结束 Q"a2.9Eo //int count = 0; |c-LSs'\ //是否结束while循环 Oi:JiD= boolean breakWhile = false; -7'#2P<) 9CUimZ IN^9uL]B while(!bStop) 4lc)& { *2u
E write_nPos(); fUag1d Utility.sleep(500); rlok%Rt4Z breakWhile = true; QF-)^`N .BTx&AqU 7x.%hRk for(int i=0;i<nStartPos.length;i++) pt:;9hA { !^U6Z@&/R if(!fileSplitterFetch.bDownOver) {j(4m { >3;^l/2c breakWhile = false; ](r
^.k,R break; 2xmk,&s } (0*v*kYdL+ } nYv#4* if(breakWhile) ]>:^d%n,} break; ;np_%?is i%(yk#=V `rWB`q|i<
//count++; (b/d0HCND //if(count>4) MM#cLw // siteStop(); &jts:^N> } #dJ 2Q_2 PNF4>)
AvRcS]@= System.err.println("文件下载结束!"); Wb=Jj 9; } z<C[nR$N catch(Exception e){e.printStackTrace ();} 9rj('F&1 } &R]pw`mTH f[/.I,9U^ hd^x}iK" //获得文件长度 G_oX5:J* public long getFileSize() 0*(K DDv { GXb47_b^ int nFileLength = -1; +}!DP~y+ try{ }X1.Wt=? URL url = new URL(siteInfoBean.getSSiteURL()); 2o{@nN8% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %= u/3b:o httpConnection.setRequestProperty("User-Agent","NetFox"); Rlg#z4m j)D-BK&+ okBE|g int responseCode=httpConnection.getResponseCode(); uIP
iM8( if(responseCode>=400) =Q?f96T { ;bHfn-X processErrorCode(responseCode); oXc/#{NC return -2; //-2 represent access is error j8HOc( } ?M&4pO&Y OCx5/ 88X ~"mj;5Id String sHeader; yuNfhK/#r 0M!0JJy#* Fe="EDh for(int i=1;;i++) ' Js?N { r=csi //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); CM 9P"- //Utility.log(in.readLine()); i>Iee^_( sHeader=httpConnection.getHeaderFieldKey(i); 7Jx%JgF if(sHeader!=null) )*[
""& { .)ST[G]WK if(sHeader.equals("Content-Length")) O<`R~ { F!CAitxd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Dr'sIH^ break; atnQC } ('WY5Yps } ,+-? Zv 2 else k/#M<z break; aW`dFitpM } :o\5K2]: } B
T7Id catch(IOException e){e.printStackTrace ();} +Jw{qQR/* catch(Exception e){e.printStackTrace ();} i| xt f aF])"9 6GOg_P Utility.log(nFileLength); ;:_(7| wW()Zy0) t-lv|%+8 return nFileLength; :Y.e[@!1x } vXubY@k2 1l]C5P}E jaqV[*440U //保存下载信息(文件指针位置) 6$z'wy/* private void write_nPos() 4g!7
4a { {bTeAfbf] try{ $I(}r3r output = new DataOutputStream(new FileOutputStream(tmpFile)); ;C_ > output.writeInt(nStartPos.length); 1 ;Ju] for(int i=0;i<nStartPos.length;i++) G;2[ { ?>)yKa# U // output.writeLong(nPos); /| f[us-w output.writeLong(fileSplitterFetch.nStartPos); lM&UFEl-\ output.writeLong(fileSplitterFetch.nEndPos); ?waebuj> } =, TS MV output.close(); U?EG6t } b Fn(w:1Q catch(IOException e){e.printStackTrace ();} PSEWL6=]N catch(Exception e){e.printStackTrace ();} a>(~ C'(< } N?^_=KE@ U9F6d!:L7A sS'{QIRC' //读取保存的下载信息(文件指针位置) 'fl(N2t private void read_nPos() RO$*G
jQd { ! OfO:L7- try{ paYz[Xq DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Bt6xV<jD int nCount = input.readInt(); vrO%XvXW nStartPos = new long[nCount]; 0x4l5x$8 nEndPos = new long[nCount]; ~ a>S#S for(int i=0;i<nStartPos.length;i++) +{0=<2(EC { Wbd_aR
( nStartPos = input.readLong(); Bn_g-WrT nEndPos = input.readLong(); 9@etg4#] } Cg*kN"8q input.close(); H` Lu"EK } 9/Wn!Ld catch(IOException e){e.printStackTrace ();} >.@MR<H#5 catch(Exception e){e.printStackTrace ();} U2=hSzY } %Y 2G 0/*X=5 `r9^:TMN private void processErrorCode(int nErrorCode) CwB] )QV? { (ic@3:xR System.err.println("Error Code : " + nErrorCode); EGEMZCdk2 } lux9o$ % rxArTpS{.# X_!$Pk7ma //停止文件下载 _;VYFs public void siteStop() U-ULQ| 6U { |QMT
A5 bStop = true; )=Y-f?o! for(int i=0;i<nStartPos.length;i++) G
"c/a8 fileSplitterFetch.splitterStop(); R{ 4u|A?9 (Otur g!\QIv1D } Pd,!& } $4:~*IQ //负责部分文件的抓取 R1~7F{FW **FileSplitterFetch.java 0pCDEs */ m9k2h1 package NetFox; ,`+Bs&S 8 $ JuLAqq xNx`J@xt$ import java.io.*; ^[*AK_o_DQ import java.net.*; W -3w7^ o=@ UXi {YfYIt=. public class FileSplitterFetch extends Thread { 2t.fD@ %K`4k.gN w[|y0jtw String sURL; //File URL }0krSzcn#, long nStartPos; //File Snippet Start Position EtPgzw[#c9 long nEndPos; //File Snippet End Position r"6lLc int nThreadID; //Thread's ID (s.o boolean bDownOver = false; //Downing is over VJGwd`qo*A boolean bStop = false; //Stop identical mxZ4
HD{ FileAccessI fileAccessI = null; //File Access interface }el,^~ &4[<F"W>47 z[%[bs2{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :> x:(K { EyzY2>"^ this.sURL = sURL; }&=uZ: this.nStartPos = nStart; T<_+3kw this.nEndPos = nEnd; &KLvr| nThreadID = id; ;,R[]B01u fileAccessI = new FileAccessI(sName,nStartPos);//定位 E=3#TBd } :E}6S &(GopWR`e i^~sn `o public void run() v)TUg0U=, { e-1;dX HL while(nStartPos < nEndPos && !bStop) g+VRT,r { t%
<pbZO 5BZ+b_A>VV _8Pmv$ try{ yFIl^Ck% URL url = new URL(sURL); PZ~`O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); EC0zH#N httpConnection.setRequestProperty("User-Agent","NetFox"); 5X#i65_- String sProperty = "bytes="+nStartPos+"-"; 7ucx6J]c httpConnection.setRequestProperty("RANGE",sProperty); g52 1Wdtnn Utility.log(sProperty); 1fmSk$ y.9 .Ydr[ F%9e@{ InputStream input = httpConnection.getInputStream(); lrq>TJEcx //logResponseHead(httpConnection); (q0No26;( 7O]J^H+7 Q=dw 6 byte[] b = new byte[1024]; oA5<[&~< int nRead; -wJ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) q|?`Gsr { 8|fLe\" nStartPos += fileAccessI.write(b,0,nRead); {H/8#y4qp& //if(nThreadID == 1) V}j%gy` // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "tEj`eR } jt0H5-x pW`ntE#L W`
WLW8Qsw Utility.log("Thread " + nThreadID + " is over!"); &E} I bDownOver = true; `8.1&fBr //nPos = fileAccessI.write (b,0,nRead); IY-(-
a8 } F0X5dv catch(Exception e){e.printStackTrace ();} "v*oga% } Cij$GYkv } >aNbp B:B0p+$I
}x{rTEq //打印回应的头信息 ]t8{)r public void logResponseHead(HttpURLConnection con) JI28O8 { {Q}!NkF1 for(int i=1;;i++) "FD<^
{ _Ac/i r[,: String header=con.getHeaderFieldKey(i); Krt$=:m|1 if(header!=null) f>.`xC{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); v)wY Utility.log(header+" : "+con.getHeaderField(header)); &\CJg'D:m else TsoCW]h break; z_5rAlnwT. } WV5r$ } ]Om'naD ahK?]:&QO ,+swH;=7#r public void splitterStop() |?4~T: { {o Q(<&Aw bStop = true; Yg\{S<wr } 5]A$P\7~1 fU\k?'x_ fzq'S]+ } ;$E~ZT4p O6*'gnke *
ePDc' /* \<0G
kp **FileAccess.java PEOM1oY)w *//文件访问(定位,写) (**-"o]HH package NetFox; ::^qy^n import java.io.*; <DA{\'jJ w!=_ 0R2S@4%Y public class FileAccessI implements Serializable{ LS R_x$G+t dXf]G6 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 AQJ|^'% RandomAccessFile oSavedFile; )3D+gu long nPos; &etL&s v 0xvMR&.H Cy`<^_i public FileAccessI() throws IOException F)[XIY&2/ { F``EARG)iu this("",0); % 8rr*l5 } -52@%uB 2 0{^l2?mgSb public FileAccessI(String sName,long nPos) throws IOException @'k,\$ / { Q{ |+3!!' oSavedFile = new RandomAccessFile(sName,"rw"); -$sl!%HO% this.nPos = nPos; e{qp!N1! oSavedFile.seek(nPos); +j)-L \ } 2fHIk57jP !9ceCnwbNN 46Y7HTwE public synchronized int write(byte[] b,int nStart,int nLen) 0{U ]STj { df21t^0/ int n = -1; ~:ub try{ *Dd(+NI oSavedFile.write(b,nStart,nLen);
]*kP> n = nLen; pUCEYR } ^^t]vojX catch(IOException e) 82^
z-t{ { MIk #60Ab e.printStackTrace (); |)|vG_ } ^6N3n kyZ S+Yy &kr_CP:; return n; uJ)\P } ^>vO5Ho. h^[ppc{Z $h|I7` } 9:}RlL+cOk F|
,Vw{ ;ZE<6;#3IP /* O;&yA< **SiteInfoBean.java RpaA)R, */ $@ T6g package NetFox; )+Y\NO?O 6a 2w-}Fs g# 9*bF public class SiteInfoBean { K\Y6
cj rH}Dt@ @'NaA SB private String sSiteURL; //Site's URL n'x`oI)- private String sFilePath; //Saved File's Path XSHwE)m private String sFileName; //Saved File's Name )P(d66yq'u private int nSplitter; //Count of Splited Downloading File ]VHdE_7) {8>_,z^P) iBPdCp%]` public SiteInfoBean() bCY^.S- {//nSplitter的缺省值为5 q)z1</B- //default value of nSplitter is 5 >m;|I/2@ this("","","",5); JUaKj@a| } r,Y/4(.c7U +^]PBMM1w U(Hq4D public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %;"B;~ { b/D9P~cE sSiteURL= sURL; 4<eJ sFilePath = sPath; zYgK$u^H sFileName = sName; 4o)\DB?! this.nSplitter = nSpiltter; ?G%, k
LJJ ]mJAKycE% W&~iO } u=ds]XP@ ,uqbS +=29y@c public String getSSiteURL() 61eKGcjs: { [jtj~]&mO return sSiteURL; g^<q L| } ke;*uS d= T9mj.@ s_Ge22BZ public void setSSiteURL(String value) 1+PNy d { gp|7{}Q{ sSiteURL = value; 'k(~XA}X: } }mT%N eS aBA#\eV GO:1
Z?^ public String getSFilePath() (1r>50Ge { ,[K)E return sFilePath; n9-q5X^e> } zf!\wY"` GWkJ/EX o4I!VK(C#s public void setSFilePath(String value) fb=$<0Ocj { PB3!; sFilePath = value; VkP:%-*#v } Xm:gD6;9 ?D$b%G{ s%TO(vT public String getSFileName() @*`UOgP7 { 5KPPZmO return sFileName; ;(iUY/ h[h } g9r5t'; W0?Y%Da(4m 51(`wo>LS public void setSFileName(String value) d=5}^v#4 { WUOPYYW<o sFileName = value; $P}]|/Yb } F*jjcUk t%YX-@ /Geks/ public int getNSplitter() Qmc;s{-r; { .Mft+," return nSplitter; X=c
,`&^ } m=y,_Pz>U z1KC$~{O $^+KR]\q public void setNSplitter(int nCount) z?) RF[ { kKk |@ nSplitter = nCount; /dvnQW4}8 } &+r
;> } `GN5QLg#}0 :>-sITeY !m O] zn /* \S@=zII_ **Utility.java Z$=$oJzB */ MUt^mu$86 package NetFox; eq 1 4 t:j07 ,1~ 2,QApW_Y public class Utility { kE(-vE9 QO`Sn N} D30Z9_^%: public Utility() mM^8YL { LVcy.kU@] ppo$&W
&z H=SMDj)s+ } mt6uW+t/ wTuRo
J //线程睡眠 #Uk6Fmu] public static void sleep(int nSecond) .+~kJ0~Y { @_:?N(%( try{ v&/-&(+ Thread.sleep(nSecond); J3}C T } m_ONsZHy catch(Exception e) jE5
9h { Fu$Gl$qV?% e.printStackTrace (); O09g b[ } `[u>NEb } !";$Zu 5N</Z6f'o //日志 n)7$xYuH public static void log(String sMsg) ]be2jQx3 { \c^jaK5 System.err.println(sMsg); O
NzdCgY } (V%vFD1) X!HSS/' ^>}[[:( 6/ public static void log(int sMsg) 2X|jq4 { .B-,GD} System.err.println(sMsg); ;? QAPTz } $,v+i
- } Z42 Suy r\- k/ 0 0lq4 /* }@0. **TestMethod.java sEi.f(WA */ z{+; '9C package NetFox; D7'0o`| Y `p&*O ]Lft^,7 public class TestMethod { y/*Tvb #TJ =@/^1.` [*E.G~IS` public TestMethod() wbKBwI5w { ///xx/weblogic60b2_win.exe !x /Z" try{ Pb&+(j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Jy
NY * //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); oa|*-nw SiteFileFetch fileFetch = new SiteFileFetch(bean); -^yc yZ fileFetch.start(); XQ y|t"Vq> } `5jB|r/ catch(Exception e){e.printStackTrace ();} [4yQbqe; &=O1Qg=K d(tf: @ } mK/P4]9g AsF`A"Cdw< TTak[e&j3 public static void main(String[] args) 3Ya6yz { 'UCx^- new TestMethod(); Gf.o{ } #u(,#(P'# } KftM4SFbK 点击下载更多相关资料
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