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/* P><o,s"v **SiteFileFetch.java A*um{E+ */ AhNq/?Q Q~ package NetFox; xe*aC import java.io.*; ak;*W import java.net.*; A]DTUdL 0$-xw !=N"vD* public class SiteFileFetch extends Thread { fXc m|U,ho Lliqj1& k70|'* Kh SiteInfoBean siteInfoBean = null; //文件信息Bean B`
k\ EL' long[] nStartPos; //开始位置 HB7;0yt`: long[] nEndPos; //结束位置 1n@8Kv FileSplitterFetch[] fileSplitterFetch; //子线程对象 PnoPbk[< long nFileLength; //文件长度 Yc'kvj)_M boolean bFirst = true; //是否第一次取文件 2/0v B> boolean bStop = false; //停止标志 n-%s8aaVf File tmpFile; //文件下载的临时信息 APO>y DataOutputStream output; //输出到文件的输出流 o0pII )v h}xeChw] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %%4t~XC# public SiteFileFetch(SiteInfoBean bean) throws IOException %wSj%>&-R { d.P\fPSD siteInfoBean = bean; -*XCxU' //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); M6}3wM*4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); '60 L~`K if(tmpFile.exists ()) K5XK%Gl" { IhA* " bFirst = false; Oj^,m.R read_nPos(); Q_Gi]M9 } r3\cp0P;s else PoT`}-9 { |P%DkM*X nStartPos = new long[bean.getNSplitter()]; D&/L: nEndPos = new long[bean.getNSplitter()]; z5r$M } o5Q{/ IzpZwx^3'' OdB?_.+$ f4PIoZ e } ?'<nx{!c <NuUW9+ `YIf_a{ public void run() Iwc{R8BV { 48*Do}l] //获得文件长度 u6bXv( //分割文件 o!!yd8~*r //实例FileSplitterFetch A$a1(8H //启动FileSplitterFetch线程 n2fbp\ I //等待子线程返回 Q
!(pE& try{ (owrdPT! if(bFirst)
!OuWPH.
: { `^4vT3e nFileLength = getFileSize(); -Q
U^c2 if(nFileLength == -1) $n^gmhp { lj?v4$ System.err.println("File Length is not known!"); ]._LLSzWhg } cwL1/DGDB else if(nFileLength == -2) \
5,MyB2/` { %C=]1Q=T) System.err.println("File is not access!"); |e2be1LD } }eRD|1 else :P(K2q3 { &Ky_v^ for(int i=0;i<nStartPos.length;i++) :"!9_p(,, { r!{LLc}> nStartPos = (long)(i*(nFileLength/nStartPos.length)); hc'-Dh } %Pqf{*d8 for(int i=0;i<nEndPos.length-1;i++) 1M}&Z H { :G<E^<M\)^ nEndPos = nStartPos[i+1]; _z1(y}u} } MC{
2X nEndPos[nEndPos.length-1] = nFileLength; 44F`$.v96 } Rh>}rGvCUN } Ey4z.s'-l qvv2O1c"A C|?o*fQ //启动子线程 {U_$&f9s fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; R?p00 for(int i=0;i<nStartPos.length;i++) {4-[r#R<M { Yp:KI7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ($~RoQ=0S siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Y)}Rb6qGW nStartPos,nEndPos,i); QurW/a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ZPD[5)~ fileSplitterFetch.start(); Cj?L@%" } ubmrlH\d // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eEn;!RS) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); V}zEK0n(6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", NMi45y(Y nEndPos = " + nFileLength); bcZf>:gVf // fileSplitterFetch[nPos.length-1].start(); jr`Es s leQT-l2Bk 59Gk3frk( //等待子线程结束 B.L]Rk\4 //int count = 0; b? j< BvQ //是否结束while循环 U2%.S&wS,e boolean breakWhile = false; "5, dzkw$m^@^ 0]jA<vLR while(!bStop) p}<w#p
| { ~jb"5CX write_nPos(); ]J#9\4Sq Utility.sleep(500); vC5n[0 breakWhile = true; i}~SDY nYJTKU
J;prC for(int i=0;i<nStartPos.length;i++) @ G4X { +Lnsr\BA if(!fileSplitterFetch.bDownOver) q`G, L( { ScSZGs 5& breakWhile = false; "XT"|KF|D break; 1\r|g2Z
: } =ID
2 } >X51$wBL if(breakWhile) >B>CB3U break; BY]i;GVq p^pOuy8 =?-ye!w //count++; IO/4.m-aN# //if(count>4) 41_SRh7N // siteStop(); .n=Z:*JqQ } kVD(Q~< %G?;!Lz 1DA1N<' System.err.println("文件下载结束!"); {Ions~cO) } T_lsGu/ catch(Exception e){e.printStackTrace ();} ymNnkFv } mB\C?=_ MBXBog7U ~%2pp~1K //获得文件长度 sIv)' public long getFileSize() jU5 }\oP@ { 7^Yk`Z?|a int nFileLength = -1; wm+})SOX9 try{ ,p9i% i URL url = new URL(siteInfoBean.getSSiteURL()); I=!rbF;Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l]]l httpConnection.setRequestProperty("User-Agent","NetFox"); +GAf O0 "rAY.E] 3bNIZ#`|MB int responseCode=httpConnection.getResponseCode(); VG>vn`x>a if(responseCode>=400) Z,.G%"i3C { 5~yNqC processErrorCode(responseCode); x[Wwq=~ return -2; //-2 represent access is error ^`D=GF^tX } L.=w?%:H= g5q$A9.Jl U-^[lWn[@4 String sHeader; tM#lFmdd\P @;?T~^nGj ^xZ
e2@ for(int i=1;;i++) $v b,P( { c c //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =-o'gL //Utility.log(in.readLine()); Ea(,aVlj sHeader=httpConnection.getHeaderFieldKey(i); &k8vWXMGk% if(sHeader!=null) w;e(Gb%9 { A4QcQ" if(sHeader.equals("Content-Length")) W8g'lqc| { h},oF!, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p\Lq}tk< break; {W\T"7H } SAY
f'[|w } 4R8G&8b else _pH{yhA break; d`
Sr4c } +B|7p9qy } 28OWNS
M= catch(IOException e){e.printStackTrace ();} :5yV.7 catch(Exception e){e.printStackTrace ();} %AW4.3()8 n$:IVX"2b "+uNmUUnm Utility.log(nFileLength); Ap$y%6 > MG>=A UgN28YrW return nFileLength; -!({BH-M_ } pDhse2 #pHs@uvO _U{&@}3
//保存下载信息(文件指针位置) &J!aw private void write_nPos() 6q>+!kXh { [/_+>M try{ =\t /u output = new DataOutputStream(new FileOutputStream(tmpFile)); dXn%lJ output.writeInt(nStartPos.length); 5TUNX^AW for(int i=0;i<nStartPos.length;i++) s9oO%e< { LG]3hz9^9 // output.writeLong(nPos); &5t :H 8b output.writeLong(fileSplitterFetch.nStartPos); -xD*tf* output.writeLong(fileSplitterFetch.nEndPos); aV1lJ;0 } Hk7K`9 output.close(); -]:GL>b } 7'NS9| catch(IOException e){e.printStackTrace ();} [\Qr. 2 catch(Exception e){e.printStackTrace ();} cubUq5 } \x>65; O3o: qly! >ulY7~wUv //读取保存的下载信息(文件指针位置) *xR
2)u private void read_nPos() a8AYcEb { yA[({2% try{ x&A vUJ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +!0eu>~_& int nCount = input.readInt(); S|B$c E nStartPos = new long[nCount]; H@uE> nEndPos = new long[nCount]; EC6k{y}bA for(int i=0;i<nStartPos.length;i++) :"o
o> { 8p1ziz`4>$ nStartPos = input.readLong(); k8]O65t| nEndPos = input.readLong(); =iHiPvP0 } ug`NmIQP input.close(); ;PyZ?Z; } >\A8#@1 catch(IOException e){e.printStackTrace ();} k#:2'!7G catch(Exception e){e.printStackTrace ();} n+1y } Qju`e Eo #hw/^AaD- b.2J]6G
private void processErrorCode(int nErrorCode) 3_5XHOdE { W0cgI9=9 System.err.println("Error Code : " + nErrorCode); %}>dqUyQ } /Y^8SO4 |vFj*XU `3q;~ 9 //停止文件下载 DW(~Qdk public void siteStop() 0F;,O3Q { 1f(DU4h bStop = true; k6\^p;!Y for(int i=0;i<nStartPos.length;i++) C+NF9N fileSplitterFetch.splitterStop(); {w^uWR4f jQj,q{eA E&~nps8e } giavJ| } 7 boJ* //负责部分文件的抓取 kVDe6},D7 **FileSplitterFetch.java G.U5)4_^ */ 4-v6=gz. package NetFox; 5 ZfP Me:{{-V4 ?PPZp6A3L= import java.io.*; v@EQ^C2.& import java.net.*; yy(A(} bb=uF1 F#+ .>!
public class FileSplitterFetch extends Thread { Ey&aBYR HT`1E0G8) oYM,8 K String sURL; //File URL >E"9*:.^a long nStartPos; //File Snippet Start Position u2sR.%2U< long nEndPos; //File Snippet End Position rU#li0
> int nThreadID; //Thread's ID mxqG-*ch- boolean bDownOver = false; //Downing is over ?n'OF pd boolean bStop = false; //Stop identical %kU'hzLg FileAccessI fileAccessI = null; //File Access interface q9}m!*8e eK`PxoTI-I ,|To#umym> public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException .\5$MIF { (%<' A this.sURL = sURL; ]re'LC!d this.nStartPos = nStart; %c6E-4b this.nEndPos = nEnd; "<l<&
qp nThreadID = id; G5'_a$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 W."f8ow } -)w]a{F .`C
V^\ @Z\~ public void run() S]2 {ZDP { \3PE+$ while(nStartPos < nEndPos && !bStop) cBEHH4U { t;#Gmo zX5G;,_ fnH3CE try{ hG Apuy URL url = new URL(sURL); M$&>5n7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #s+X+fe httpConnection.setRequestProperty("User-Agent","NetFox");
E8-53"m String sProperty = "bytes="+nStartPos+"-"; YL5>V$i httpConnection.setRequestProperty("RANGE",sProperty); y@apJ;_R- Utility.log(sProperty); v:d9o.h Q~
0Dfow? 68x}w
Ae InputStream input = httpConnection.getInputStream(); MTmO>V&O //logResponseHead(httpConnection); qa!RH]B3 4#Eul yr4ou byte[] b = new byte[1024]; mtw9AoO int nRead; g"y?nF.&F while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) BXTN>d27 { +Z+ExS<#z nStartPos += fileAccessI.write(b,0,nRead); W(@>?$& //if(nThreadID == 1) zk>h u<_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); SFO&=P:U } D<nxr~pQ !A[S6-18%- 2a[9h# Utility.log("Thread " + nThreadID + " is over!"); AMk~dzNt bDownOver = true; KU2$5[~j //nPos = fileAccessI.write (b,0,nRead); fI11dE9&?[ } $!`L"szqD* catch(Exception e){e.printStackTrace ();} 5G?.T? } W/v|8-gcK } YsAF{ k|#Zy, #?m{YT{P //打印回应的头信息 -2lRia public void logResponseHead(HttpURLConnection con) *ro.mQ_ { 3A
R%&:- for(int i=1;;i++) ){tPP$-i= { ]p$zvMf} String header=con.getHeaderFieldKey(i); \GHOg.P if(header!=null) ~hD{coVTI //responseHeaders.put(header,httpConnection.getHeaderField(header)); +k
rFB?>` Utility.log(header+" : "+con.getHeaderField(header)); l10-XU02 else *g$agyOfh break; X')S;KW } $,P\)</VR } '49L(>. /c^e&D T~:_}J public void splitterStop() GYqJ!, { r{V.jZ%p'Z bStop = true; h[H%:743 } Ej|A
; &E m0Z7N5v) 1NGyaI } ~'[jBn) RHXvee55 Dqr9Vv /* M c@GH **FileAccess.java oeGS
*//文件访问(定位,写) Bbs5f@E package NetFox; f+^c@0que import java.io.*; xOM_R2Md 08io<c,L O0zi@2m?B public class FileAccessI implements Serializable{ VIYV92[ wWFW,3b //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 "7?t)FOo RandomAccessFile oSavedFile; MHNe>C-!q long nPos; t
2G1[j! u#VweXyU Z^+a*^w~{ public FileAccessI() throws IOException D1!
{S7 { 1t%<5O;R this("",0);
wQw-:f- } `uhL61cMp .$^wy3:F" CLktNR(45 public FileAccessI(String sName,long nPos) throws IOException r_=p,#}# { )(.%QSA\C oSavedFile = new RandomAccessFile(sName,"rw"); X}?ESjZJ this.nPos = nPos; (NM6micc oSavedFile.seek(nPos); <>&89E%j' } c&A]pLn+x z0;9SZ9 4)E|&)-fu8 public synchronized int write(byte[] b,int nStart,int nLen) }8
\|1@09 { uegb;m int n = -1; :Lc3a$qtx5 try{ L77EbP`P oSavedFile.write(b,nStart,nLen); #Wq#beBb n = nLen; X,&xhSzg? } {\lui eG catch(IOException e)
Y 0]Kl^\A { 4UazD_`' e.printStackTrace (); -g<cinNSp } tnNZ`]qY pr)K{~m]{< # a.\P.{L return n; Kf&r21h } S8vx[ < 6_Fpca3L UMv"7~ } j]#wrm GA7u5D"0 Q{8qm<0g /* rEg+i@~ **SiteInfoBean.java <gR`)YF7 */ 8 `o{b"l+ package NetFox; C*$|#.l s7vPI ]}/mFY?7 public class SiteInfoBean { |o|gP8 yI lV[_ F1E.\l private String sSiteURL; //Site's URL *|@+rbjVC private String sFilePath; //Saved File's Path |z T%$ private String sFileName; //Saved File's Name *WD;C0?z private int nSplitter; //Count of Splited Downloading File ,v|CombIc. TJE%
U0Ln N*HH,m& public SiteInfoBean() u1wg
C# {//nSplitter的缺省值为5 4VC/-.At //default value of nSplitter is 5 9armirfV'P this("","","",5); ;Sy/N|| } z( *]'Y l#p}{ KQ- ,W8Q5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) a (P^e)< { P_v0))n{ sSiteURL= sURL; }FHw"
{my sFilePath = sPath; EqVsxwa sFileName = sName; C+T&O this.nSplitter = nSpiltter; qjJ{+Rz2 $+0=GN `D4oAx d9 } `!] R!T@C 4n#YDZ G]1(X38[si public String getSSiteURL() "^Y6ctw { }7-7t{G return sSiteURL; `Fz\wPd } &3jBE-- ;HR 6X VjC*(6<Gj public void setSSiteURL(String value) te4F"SEf { /A0 [_ sSiteURL = value; U0!^m1U: } 0`V3s]%iu LG"c8Vv&)~ sg+ZQDF{x public String getSFilePath() z|Hy>|+ { m*\B2\2gJ return sFilePath; f2`P8$U)R } qPL^zM+ r9+E'\ H&~5sEGa public void setSFilePath(String value) 2f`WDL { @][ a8:Y9I sFilePath = value; "xL;(Fqu } f37ji e 4 p*51ra q-A`/9 public String getSFileName() fEx+gQW_ { <jpe u^7 return sFileName; Rrh<mo(yj# } x%_qJ]o oNiToFbQu : =
]sq}IN public void setSFileName(String value) JmnBq<&,0 { R)sp sFileName = value; 3Ne9%" } i7i|370 -iY9GN89c aQ32p4C public int getNSplitter() - 3C* P
{ muL>g_H return nSplitter; LvSP #$f } EC^Ev|PB\u b24NL'jm D?iy.Dg public void setNSplitter(int nCount) b*btkaVue { 2N
L:\%wz nSplitter = nCount; >{phyByI } NvQY7C } |WD,\=J2 pe\Txg6 l,imT$u /* #]5&mKi **Utility.java y%{*uH}SL */ S4#A#a2J package NetFox; y_}K? cmwzKu% 34X(J-1\|i public class Utility { f}L>&^I) u@GRN`yn nQ:ml public Utility() *,O
:>Z5I { NmH}"ndv+ 2E@C0Ha L A6@+gP< } C ffTv UgF) J //线程睡眠 gi1}5DR public static void sleep(int nSecond) o|rGy5 { n/KI"qa]9 try{ K[iY{ Thread.sleep(nSecond); Y|hzF:ll } s|{^ }4{ catch(Exception e) I}*]m%'-Y { Ma` e.printStackTrace (); aHBByH } }V1DyLg: } >XD02A[ +Z 93` //日志 [(D}%+2 public static void log(String sMsg) NZfo`iHAN { 1Qp1Es<) System.err.println(sMsg); W+#}~2&Dv } H]%mP| ?c|`R1D J]n7| L public static void log(int sMsg) u\Nw:Uu i { "'Q" (S System.err.println(sMsg); gt2>nTJz.Z } zPX=MfF } afxj[;p! zxk??0]/ %4|n-`: /* _'?8s6 H **TestMethod.java RT.wTJS; */ WU+Jo@]y package NetFox; `@u+u0 vSyi}5D NPB ,q& Th public class TestMethod { 8I5 VrT |1_$!
p 9E->;0- public TestMethod() H3p4,Y}'# { ///xx/weblogic60b2_win.exe +P>
A
P& try{ X]+(c_i:hC SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]X>QLD0W //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +(QMy&DtS SiteFileFetch fileFetch = new SiteFileFetch(bean); ;JPbBwm fileFetch.start(); Lyf? V(S } hr~qt~Oi catch(Exception e){e.printStackTrace ();} !T#8N7J> /ygUd8@ [T}%q"< } %#S "~) D]G'R5H ?c=R"Yg$ public static void main(String[] args)
rvwl { Ab^>z new TestMethod(); l ) )~& } %U=S6<lbj; } ~n8*@9[ 点击下载更多相关资料
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