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/* B9#;- QO **SiteFileFetch.java %{'4.
, */ qqvF-mDN package NetFox; A[JM4x
import java.io.*; ir&.Z5= import java.net.*; "DpKrVuG yU_9a[$V L~&" aF/b public class SiteFileFetch extends Thread { ,LUTHWEo"I k|B2@{ @i1q]0 SiteInfoBean siteInfoBean = null; //文件信息Bean j^EbO3 long[] nStartPos; //开始位置 qm%nIU \* long[] nEndPos; //结束位置 m~>@BCn; FileSplitterFetch[] fileSplitterFetch; //子线程对象 [W;[v<E; long nFileLength; //文件长度 ^yVl"/ boolean bFirst = true; //是否第一次取文件 uJ8{HB boolean bStop = false; //停止标志 nk/vGa4 File tmpFile; //文件下载的临时信息 D=&K&6rr DataOutputStream output; //输出到文件的输出流 (/?R9T[V&^ S#2[%o //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (>AFyh&3,X public SiteFileFetch(SiteInfoBean bean) throws IOException Dbz]{_Y; { 38Efp$) siteInfoBean = bean; X| <yq //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); fj+O'X tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i0ybJOa4 if(tmpFile.exists ()) LNiS`o\ { a.,_4;'UE1 bFirst = false; +)gB9DoK read_nPos(); O-!,Jm } I7G,`h+H else xZ+]QDKC { _B$"e[:yX nStartPos = new long[bean.getNSplitter()]; =bL{i&& nEndPos = new long[bean.getNSplitter()]; .
#U}q 7X } 0p3vE,pF '{VM>Q M[s\E4l:t d+5:Qrr } zH=hIVc Dl A Z"C p+<}YDMb public void run() K\^&+7&zVg { ipZHSA //获得文件长度 9,WG!4:+W
//分割文件 @]?R2bI //实例FileSplitterFetch aU(tu2 //启动FileSplitterFetch线程 Z*eoA //等待子线程返回 r0btC@Hxy try{ YoAg if(bFirst) f:vD`Fz1 { RIjM(P nFileLength = getFileSize(); D]u=PqHk2 if(nFileLength == -1) /b{HG7i\ { [`nY2[A$ System.err.println("File Length is not known!"); C +@ i } fSI %c3 else if(nFileLength == -2) * nCx[ { 9L HuS System.err.println("File is not access!"); eP= j.$ } _}ele+ else {D,RU8& { V(..8}LlD for(int i=0;i<nStartPos.length;i++) E}$V2ha0zu { x6e +7"#~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); %U?)?iZdL } 7\%$>< K for(int i=0;i<nEndPos.length-1;i++) ]o*$h$? s { ) 4ncutb nEndPos = nStartPos[i+1]; CZ tiWZ } M/B/b<[' nEndPos[nEndPos.length-1] = nFileLength; &+- e } v#U pw\! } 2AK}D%jfc #r}uin*jD kqf8=y //启动子线程 m6MaX}&zv fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6~@5X}^<0 for(int i=0;i<nStartPos.length;i++) usH%dzKK { ]l&'k23~p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), o#}mkE87 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \ V?I+Gc nStartPos,nEndPos,i); +-ewE-:|L Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z!Hx @){| fileSplitterFetch.start(); 8ds}+TtbY } 5hz_P+Q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8\_*1h40s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); vgAFuQi( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5/(sjMB nEndPos = " + nFileLength); XhA4:t // fileSplitterFetch[nPos.length-1].start(); sam[s4@eQ F*\4l;NJ [*HiI= //等待子线程结束 ZIW7_Y>_ //int count = 0; K~@`o-Z[ //是否结束while循环 O6]u!NqG boolean breakWhile = false; ]_#SAhOR) {AgBwBCE ^A#x<J+ while(!bStop) !gJzg*{u@ { ]-Lruq# write_nPos(); }!B.K^@) Utility.sleep(500); y5%5O xB breakWhile = true; m1y `v" mATH*[Y 5rN7':(H!% for(int i=0;i<nStartPos.length;i++) ?i%nMlcc { b9#m m if(!fileSplitterFetch.bDownOver) AY;<q$8j%, { zq=&4afOE breakWhile = false; t=
*Jg/$ break; Hz? ,#>{ } y/\ZAtnLo } ;sQ20 B' if(breakWhile) pN+I]NgQ break; _yJ|`g]U3 -(
Kh.h KBj@V6Q //count++; ~'{VaYk]v //if(count>4) |*1xrM:v~ // siteStop(); r\RFDj } >#?iO]). Om6Mmoqh D 2$^" System.err.println("文件下载结束!"); 5p{25N_t } #G~wE*VR$ catch(Exception e){e.printStackTrace ();} C*Xik9n } vX 1W@s 9tAE#A B!iFmkCy //获得文件长度 UOJ*a1BM public long getFileSize() kwc*is { <(?'
s9 int nFileLength = -1; oN ;-M-( try{ )@,N7Y1h URL url = new URL(siteInfoBean.getSSiteURL()); IywiCMjH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )r#,ML httpConnection.setRequestProperty("User-Agent","NetFox"); hpas'H>J O!,Ca1N l.uN$B int responseCode=httpConnection.getResponseCode(); jm+blB^%K if(responseCode>=400) Bs@:rhDi { A$ J9U3+O processErrorCode(responseCode); yWmrdvL return -2; //-2 represent access is error ?-S8yqe } wA1Ey:q 0}D-KvjyP OOfyGvs String sHeader; []=_<]{ <OIUyZS }1,'rmT for(int i=1;;i++) FvAbh]/4 { s!aO*\[<h //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3l$E8?[Zwi //Utility.log(in.readLine()); y,V6h*x2 sHeader=httpConnection.getHeaderFieldKey(i); 9u?Eb~#$ if(sHeader!=null) VZTmzIk.Y { X'xUwT|_+ if(sHeader.equals("Content-Length")) l[Tt[n { @wMQC\Z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |SxMN%M! break; %fBP:5%K } ]d^k4 d } V&g)m.d:n else TqXge{r break; W oWBs)E } FN>L7
*,0 } <c(&T<$ catch(IOException e){e.printStackTrace ();} _TrZ'iL}T catch(Exception e){e.printStackTrace ();} N6WPTUQ1mF }a'cm!" . Jptj Utility.log(nFileLength); )O9f hj) WqR7uiCi lS#7xh return nFileLength; X:U=MWc> }
}\>+H H<$pHyxU *!i,?vn //保存下载信息(文件指针位置) %n4@[fG%K private void write_nPos() 5`{=` { r1+c/;TpZ try{ 9uKOR7.zbo output = new DataOutputStream(new FileOutputStream(tmpFile)); k{_1r; output.writeInt(nStartPos.length); 0u>yT?jP for(int i=0;i<nStartPos.length;i++) ftxTX3X { z}iSq$ // output.writeLong(nPos); lx`q *&E output.writeLong(fileSplitterFetch.nStartPos); 7:z>+AM[r output.writeLong(fileSplitterFetch.nEndPos); ' 4,y } hN[X 1* output.close(); d3og?{i<}& } Gl.?U;4Z catch(IOException e){e.printStackTrace ();} 8~;{xYN ) catch(Exception e){e.printStackTrace ();} AjG)1 } 7,f:Qi@g PBCb0[\ YXgWH'i~ //读取保存的下载信息(文件指针位置) 4C6=77Jr private void read_nPos() =Y/}b\9`T { &ycjSBK try{ 0T(O'v}. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !X%S)VSMU int nCount = input.readInt(); ZT r:xX{R6 nStartPos = new long[nCount]; (Z5qf nEndPos = new long[nCount]; [?A&xqO3 for(int i=0;i<nStartPos.length;i++) [TP { Pb0)HlLq nStartPos = input.readLong(); tp7oc_s?. nEndPos = input.readLong(); L^6"'# } 1X[73 input.close(); 6BUBk>A` } zMbfV%b catch(IOException e){e.printStackTrace ();} uFz/PDOZ@ catch(Exception e){e.printStackTrace ();} JvKO $^ } fdN45in=> "&@gX_% fDL3:%D private void processErrorCode(int nErrorCode) dUI3erO { Rk}\)r\ System.err.println("Error Code : " + nErrorCode); MgHOj } mluW=fE p 7
,f6kG 3gC\{y!8 //停止文件下载 ] gH
wfqx public void siteStop() TViBCed40 { {F<)z%^ bStop = true; kZJt~} for(int i=0;i<nStartPos.length;i++) eH ;Wfs2f fileSplitterFetch.splitterStop(); f#*h^91x f;e_04K 2j2mW>Z } Ga]47pQ"F } u9esdOv //负责部分文件的抓取 `Q:de~+AM{ **FileSplitterFetch.java ~&t!$ */ { k
kAqJ package NetFox; i:C.8hmAE ;+TMx( h1n*WQ- import java.io.*; c$@`P import java.net.*; G%xb0%oi]% p^T&jE8])# eLCdAr public class FileSplitterFetch extends Thread { ,.~
W d^ 2u}^kG s>LA3kT String sURL; //File URL TFAYVK~ long nStartPos; //File Snippet Start Position ]\[m=0K long nEndPos; //File Snippet End Position -0{T int nThreadID; //Thread's ID d1UVvyH boolean bDownOver = false; //Downing is over `)0Rv|? boolean bStop = false; //Stop identical n/ui<&( FileAccessI fileAccessI = null; //File Access interface {CW1t5$* Tm(Q@ X(4s;i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException <]Ij(+J; { O]c=Yyl this.sURL = sURL; h=uiC&B this.nStartPos = nStart; _cW_u?0X: this.nEndPos = nEnd; :Tlf4y:/w nThreadID = id; b{Z^)u2X fileAccessI = new FileAccessI(sName,nStartPos);//定位 AQE
eIFH } *!._Ais,\ (J6"
; }rO?5 public void run() yTzY? { q>Q:X3
while(nStartPos < nEndPos && !bStop) @WhZx*1 { <8}KEe4 Ah6wU|_-g s/r5,IFR try{ ;b, -$A URL url = new URL(sURL); 'CP/ym f/a HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mle_*Gy8 httpConnection.setRequestProperty("User-Agent","NetFox"); LEYWH%y String sProperty = "bytes="+nStartPos+"-"; %1Vu=zCAW httpConnection.setRequestProperty("RANGE",sProperty); v[0DE*p Utility.log(sProperty); E"Ya-8d= Xjs21-t% +AE&GU InputStream input = httpConnection.getInputStream(); #Tr;JAzVjG //logResponseHead(httpConnection); ygmv_YLjm
#pS]k<o%1 Q%M'[L?[ byte[] b = new byte[1024]; + ")qi= int nRead; {DKXn`V while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) F{#N6,T { !yoSMI- nStartPos += fileAccessI.write(b,0,nRead); 8[6ny=S` //if(nThreadID == 1) 7Vz[ji // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bBkm]
> } !!?+M @ Y|{r
vBKjf
`_NnQ% Utility.log("Thread " + nThreadID + " is over!"); >yV)d/ bDownOver = true; T0@](g //nPos = fileAccessI.write (b,0,nRead); Nrab*K(][ } ET >S catch(Exception e){e.printStackTrace ();} [@,OG-"& } />dB%* } tc+GR?-7W t_[M& GM)\)\kNF //打印回应的头信息 3::3r}g public void logResponseHead(HttpURLConnection con) -/(DPx { !Iw{Y' for(int i=1;;i++) {]t\`fjrg { LK'S)Jk String header=con.getHeaderFieldKey(i); p)?qJ2c| if(header!=null) K7t&fDI //responseHeaders.put(header,httpConnection.getHeaderField(header)); mF6@Y[/B Utility.log(header+" : "+con.getHeaderField(header)); ua]\xBWx else e5*5.AB6& break; %JP&ox|^& } no~O R Q } `^ieT#(O wx]+*Lzz 8ktjDs$=.: public void splitterStop() A}>|tm7| { )64LKb$ bStop = true; t*Z .e.q+ } kPx]u\ @+0@BO12 .u&&H_ UmE } KKeb ioW SY!`a:It !SLP8|Cd /* C:'WX*W **FileAccess.java ]p4`7@@)* *//文件访问(定位,写) <GL}1W"Ay package NetFox; ql#{=oGDnA import java.io.*; >,w\lf9 rh:s
7 d&PE,$XC public class FileAccessI implements Serializable{ 1S*8v 7 "4Vi=* 2V //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p6&LZ=tL3 RandomAccessFile oSavedFile; hYP6z^ long nPos; h/0<:eZ* w%i+>\tO X_-Hrp!h public FileAccessI() throws IOException
rE1np^z7 { cM> G>Yzo this("",0); ! /|0:QQi } #hy5c,}> .RQ Xxw
Ct =E;v7} public FileAccessI(String sName,long nPos) throws IOException _Ep{|]:gw { ~>}dse oSavedFile = new RandomAccessFile(sName,"rw"); tMD^$E"C this.nPos = nPos; U<ku_(2"# oSavedFile.seek(nPos); -dc5D@4`#s } Q{H!s_6iyv ~.PPf/
Z8] bl:a&<F public synchronized int write(byte[] b,int nStart,int nLen) ~cO?S2!W { 9}%~w(P int n = -1; |kBg8).B try{ r)9i1rI+ oSavedFile.write(b,nStart,nLen); _g^K$+F'} n = nLen; CI~hmL0 } wS F!Xx0 catch(IOException e) ~_dBND? { G<">/_jn e.printStackTrace (); z{D$~ ob } G:h;C].
2g ?Jb5) =FtM;(\ return n; ?;AL F } 7})!>p ) )9A<fwpN fw(j6:p } MYDf`0{$_a jt'Y(u]2 S+_A
<p /* 0]:*v? **SiteInfoBean.java J-eA,9J */ WQIM2_=M package NetFox; J]=aI>Ow 3%vx'1h[ ?vht~5' public class SiteInfoBean { T(sG.% 1eE]4Z4Q JhMrm% private String sSiteURL; //Site's URL ySr091Q private String sFilePath; //Saved File's Path m 1'&{O: private String sFileName; //Saved File's Name K*HVn2OV private int nSplitter; //Count of Splited Downloading File &|'Kut?8 .swgXiRvs J#Ne:Aj_ public SiteInfoBean() PoBukOv {//nSplitter的缺省值为5 NR;S3-Iq( //default value of nSplitter is 5 G(7\<x: this("","","",5); o3TBRn, }
FM;;x(sg nL7S3 NSiYUAug public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) eBSn1n
{ k<j)?_=` sSiteURL= sURL; T|BY00Sz` sFilePath = sPath; jziA;6uL sFileName = sName; 1v[#::Bs this.nSplitter = nSpiltter; _Sk<S \J3v>&m<7 8,H#t@+MT } ^)C$8:@ 35@Ibe~ e%@[d<Ta\ public String getSSiteURL()
4s1kZ`e { P5
<85t return sSiteURL; wNf*/?N } g`~lIt[=
t;e]L'z@: of[|b{Ze4~ public void setSSiteURL(String value) yN WbI0a { RqX4ep5j sSiteURL = value; 6M<mOhp@}n } N8L)KgM5#7 V"2AN3~& [hv3o0". public String getSFilePath() zhR_qW+ { 6Ymo%OT return sFilePath; V)?x*R*T) } #:ED 0</ `MpC<sit PE;0
jgsiI public void setSFilePath(String value) qI V`zZc { 2)I'5?I sFilePath = value; G.q^Zd#.T } v;F+fOo p-(ADQS 9^Vx*KVrU public String getSFileName() d@>k\6%j { a,0o{*(u$ return sFileName; ?w5nKpG#RI } )Ido|!]0d si
mX z7l;|T public void setSFileName(String value) `aWwF}
+Y { *V@MAt sFileName = value; g9lg } E*T84Jh6 T=f;n;/> d8 BK/b public int getNSplitter() @SQ*/sw (c { Fp|rMq return nSplitter; uTlT'9) } Bdk{.oh6 E6^S2J2 ;~1/eF public void setNSplitter(int nCount) @Ozf}}# { yV]-Oa$*s0 nSplitter = nCount; zC>(!fJqq } S,<.!v 57 } CK`3 }yC,uEV [Ey%uh
6* /* %Ty
{1'o **Utility.java fdH'z:Xao */ v8fZ?dx package NetFox; pt|$bU7 K/.hJ 7rDRu] public class Utility { PA-0FlV| g7Q*KA+ T[! q&kFB public Utility() HOQ
_T4 { :~A1Ud4c Y"\T*lKa 3<'Q`H > } 3L!&~'.Ro nTtt$I@hW //线程睡眠 yI|?iBc7nC public static void sleep(int nSecond) vheAh`u^& { OFAqP1o{$ try{ q2U"k Thread.sleep(nSecond); R^O)fL 0_ } LAVt/TcZS| catch(Exception e) 2'^OtM, { N4]6LA6x6 e.printStackTrace (); _.8]7f`*Gc } PH4bM } Qs[EA_ om39;nk!} //日志 N*oJ$:# public static void log(String sMsg) pYvF}8
{ waq_ d. System.err.println(sMsg); mE@o27 } /g-X=|?F GDQg:MgX 2uR4~XjF public static void log(int sMsg) ]~ 8N { <.B> LU System.err.println(sMsg); mt]YY<l } wU3ica&[ } 5OqsnL_V BL^Hj PaI63 ! /* o|n0?bThS- **TestMethod.java LUVJ218p */ {rJF)\2 package NetFox; &$Ip$"H 2<. /HH*f ;}9Ws6#XQs public class TestMethod { >;U%~yy}qc q9z!g/,d/ zyn =Xv@p public TestMethod() {[y"]_B4 { ///xx/weblogic60b2_win.exe w3|.4hS try{ hfa_M[#Q- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ' g!_Flk //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); NP`ll0s SiteFileFetch fileFetch = new SiteFileFetch(bean); ?B:wV?-` fileFetch.start(); {ZI6!zh' } NbMH@6%E catch(Exception e){e.printStackTrace ();} %.gjBI= 7n/I'r g#nsA(_L } t4W0~7 2Sd6b 2- &`y_R' public static void main(String[] args) {YLJKu!M { p.Yg-CA new TestMethod(); _BaS\U%1( } n/Z =q?_ } 0~5}F^8[L 点击下载更多相关资料
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