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/* 0m YZ7S5g **SiteFileFetch.java "K$ Wh1<7 */ VRQbf package NetFox; B/9<b{6 import java.io.*; IU'!?XVo import java.net.*; N"
Jtg@w MHr0CYyb. am'p^Z@ public class SiteFileFetch extends Thread { `\4JwiPo Wh'_slDH+ 7~l SiteInfoBean siteInfoBean = null; //文件信息Bean ;aK !eD$ long[] nStartPos; //开始位置 seqF84Xd< long[] nEndPos; //结束位置 7k#${,k FileSplitterFetch[] fileSplitterFetch; //子线程对象 Dss/>!
mN long nFileLength; //文件长度 zEPx boolean bFirst = true; //是否第一次取文件 z1SMQLk boolean bStop = false; //停止标志 rb}wv16? File tmpFile; //文件下载的临时信息 23\j1? DataOutputStream output; //输出到文件的输出流 77&^$JpM NtA|#"^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ZG\ I1 public SiteFileFetch(SiteInfoBean bean) throws IOException z Jo#3 { <E7Vbb9* siteInfoBean = bean; j
zmSFK g* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); C`th^dqBV tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); B:A1W{l if(tmpFile.exists ()) qp~4KukL { Sv~1XL W bFirst = false; sRe#{EuJ read_nPos(); Q!2iOvK } AR+\uD=\I- else s?G'l=CcKu { sAjKf\][ nStartPos = new long[bean.getNSplitter()]; 5nxS+`Pn.) nEndPos = new long[bean.getNSplitter()]; N9JgV,` } M8",t{7 8NAWA3^B bUAR<R'E ?;r8SowZ7 } X@h^T>[" LcpyW=)}"V %M;_(jda public void run() \A3>c| { x(3
I?#kE //获得文件长度 THbtu*El //分割文件 32bkouq //实例FileSplitterFetch Gkodk[VuLs //启动FileSplitterFetch线程 pT
ocqJ22 //等待子线程返回 ;( Ajf.i try{ `3sy>GU? if(bFirst) [nN\{"~O { %+7T9>+ nFileLength = getFileSize(); Vr/` \441 if(nFileLength == -1) UP~WP@0F { A}#]g>L System.err.println("File Length is not known!"); -|k&L}\OB0 } J^g,jBk else if(nFileLength == -2) 0,~6TV<K { GOZQ5m
- System.err.println("File is not access!"); q(jkit~`A } vU8FHVytV else 7i+!^Qj?y { M]4 =(Vv+5 for(int i=0;i<nStartPos.length;i++) h[-d1bKwS { =mi:<q nStartPos = (long)(i*(nFileLength/nStartPos.length)); aX[1H6&=7 } z3vsz for(int i=0;i<nEndPos.length-1;i++) MKVfy:g%So { )4'x7Qg/ nEndPos = nStartPos[i+1]; M ~ i+F0 } Q2[prrk%j nEndPos[nEndPos.length-1] = nFileLength; k binf } :p\(y } /+x#V!zM wzDk{4U 6HEqm>Yau //启动子线程 Ha=_u+@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; d Y:|Ef|v( for(int i=0;i<nStartPos.length;i++) }:RT,< { %EJ\|@N: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
pT3X/ra siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {w |dM# nStartPos,nEndPos,i); T<TcV9vM Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _X,[]+ziu% fileSplitterFetch.start(); /slm
]' } 7|+|\7l# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,TKs/-_? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [w+h-q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", $KwI}>E4 nEndPos = " + nFileLength); w PG1P'w; // fileSplitterFetch[nPos.length-1].start(); LL= Z$U
$ Uw2,o|=O |b$>68: //等待子线程结束 $S6HZG:N //int count = 0; }XGMa?WR //是否结束while循环 BrlzN='j} boolean breakWhile = false; cQ3W;F8|n nOAJ9 fr}1_0DDz while(!bStop) ,?xLT2>J_ { 7xv4E<r2 write_nPos(); ,]PyDq6 Utility.sleep(500); i}/e}s<-6 breakWhile = true; -y&v9OC2- E ;BPN sJ))<,e5I for(int i=0;i<nStartPos.length;i++) [K cki+ { AfbB~Ll Bq if(!fileSplitterFetch.bDownOver) v"P&`1=T { Pl rkgS0J breakWhile = false; ,hpH!J'5f/ break; e2]4a3 } *#&k+{a^2 } |^7f\.oF if(breakWhile) 8sN#e(@
break; ADv^eJJ| DS#cm3 a|DsHZ^6^ //count++; Q^z=w![z //if(count>4) prNhn:j // siteStop(); IVI~1~ } ./'~];& FAQr~G} sU) TXL'_! System.err.println("文件下载结束!"); s<[A0=LH } ,O:EX0 catch(Exception e){e.printStackTrace ();} :a_BD } H~A"C'P3# K0w<[CO ;{<aA 5 //获得文件长度 q,[k7&HS public long getFileSize() C`\9cej { s kN9O"^A int nFileLength = -1; $> "J"IX try{ k:b/Gq` URL url = new URL(siteInfoBean.getSSiteURL()); Q~Ay8L+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v,/[&ASz httpConnection.setRequestProperty("User-Agent","NetFox"); yXJ]U
\ % J|VK P7 9T(L"9r-e int responseCode=httpConnection.getResponseCode(); ;B&^yj&; if(responseCode>=400) e^j<jV`1 { c_
La^HS processErrorCode(responseCode); bGbqfO` return -2; //-2 represent access is error "j{i,&Y$_ } 9n1ZVP.ag "(s6aqO$ K&=D-50% String sHeader; PJzc=XPU ^_v[QV AY#wVy for(int i=1;;i++) t)YUPDQ@J { 6X/wdk //DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
qE )Y}oN //Utility.log(in.readLine()); tawe Gc%~ sHeader=httpConnection.getHeaderFieldKey(i); F\a]n^
Y if(sHeader!=null) Pm4e8b { 3sH\1)Zz if(sHeader.equals("Content-Length")) g>so
R&* { 9YB2e84j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (+*
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break; et=7}K]l } pmD4j8F_ } cv}aS_`f else <OTWT`G2 break; nqT> qS[Z } RctU' T } |,b2b2v? catch(IOException e){e.printStackTrace ();} zj<ahg%z catch(Exception e){e.printStackTrace ();} \V,c]I
"!O1j
r; |^R*4;Phe Utility.log(nFileLength); ((XE\V\}Z m`z7fi7u /
s,tY74'5 return nFileLength; e@E17l- } #ZJMlJ:q`" Vtr3G.P^ Ly;I,)w //保存下载信息(文件指针位置) i}v9ut]B private void write_nPos() W{
fZ[z { @}Zd (o try{ Gqb])gXpl output = new DataOutputStream(new FileOutputStream(tmpFile)); ]4`t\YaT output.writeInt(nStartPos.length); J!{Al for(int i=0;i<nStartPos.length;i++) mzX;s&N# { 'BY-OA#xJ // output.writeLong(nPos); ?~J i-{#X output.writeLong(fileSplitterFetch.nStartPos); l<(cd, output.writeLong(fileSplitterFetch.nEndPos); > !L&>OOx } [E7MsX output.close(); d+;gw*_Ei } O gmSQ catch(IOException e){e.printStackTrace ();} DECB*9O^ catch(Exception e){e.printStackTrace ();} xACdZB( } 8$0\J _ wJe?t$ac? %%%S"$t //读取保存的下载信息(文件指针位置) {T=52h=e private void read_nPos() fiVHRSX60 { )tS-.P rA- try{ .h4\{| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 4*TmlY int nCount = input.readInt(); qTT,U9]: nStartPos = new long[nCount]; Tk*w3c"$ nEndPos = new long[nCount]; T>A{qu for(int i=0;i<nStartPos.length;i++) dH\XO-Z7v { >O#grDXb nStartPos = input.readLong(); 24ux nEndPos = input.readLong(); 8Hi!kc;f6> } ^rL_C}YBj- input.close(); %y&]'A } <_Eg?ePW# catch(IOException e){e.printStackTrace ();}
%v+=;jw catch(Exception e){e.printStackTrace ();} lwT9~Hyp } D'b#,a;V 2C$R4:Ssw) & ze>X private void processErrorCode(int nErrorCode) (CJ.BHu] { 9@K.cdRjQ System.err.println("Error Code : " + nErrorCode); .$&Q[r3Lu } e4`uVq5 a^t?vv d;7uFh|o //停止文件下载 m}3gZu] public void siteStop() ('C7=u&F { #]E(N~ bStop = true; ujr(K=E for(int i=0;i<nStartPos.length;i++) Y
ya`&V fileSplitterFetch.splitterStop(); A(8n S QY"OBo<e t
P"\J(x } u,1}h L } +/rH(Ni //负责部分文件的抓取 !2tW$BP^ **FileSplitterFetch.java 3GH(wSv9\ */ }tG3tz0%fX package NetFox; 2&Jdf }7s>B24J HfB@vw^ import java.io.*; OtTBErQNF import java.net.*; 5GQLd >9H@|[C wW 2d\Zd& public class FileSplitterFetch extends Thread { 4/e60jA ~+G#n"P n P[ r];e String sURL; //File URL 47r&8C+&\ long nStartPos; //File Snippet Start Position f )Z%pgB long nEndPos; //File Snippet End Position t<j^q`;@v int nThreadID; //Thread's ID amWD-0V boolean bDownOver = false; //Downing is over zR;X*q"T$4 boolean bStop = false; //Stop identical ?4 S+edX FileAccessI fileAccessI = null; //File Access interface #]]Su91BA ]y@F8$D! &fOdlQ? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException yxt[=
C { yX!HZu;j this.sURL = sURL; C&~1M}I this.nStartPos = nStart; =1p8i this.nEndPos = nEnd; Rp9fO?ZjHt nThreadID = id; &?,6~qm[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?GA&f2]a } ORN6vX(1 "LhvzM-<8 "O[j!fG8, public void run() N587(wZ { o>Er_r while(nStartPos < nEndPos && !bStop) 6w[}&pX"z { j*v40mXl`2 ? "/ fPV- m#vL*]c} try{ w
Y URL url = new URL(sURL); SqA
J-_~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A{ eL l httpConnection.setRequestProperty("User-Agent","NetFox"); +rXF{@
l String sProperty = "bytes="+nStartPos+"-"; E
Y<8B3y httpConnection.setRequestProperty("RANGE",sProperty); sP@X g;] Utility.log(sProperty); b5G}3)'w .|qK+Hnc h}`!(K^;3 InputStream input = httpConnection.getInputStream(); JAjmrX //logResponseHead(httpConnection); 'XrRhF
( 4+;$7"fJ 4mjgt<` byte[] b = new byte[1024]; Y-mK+12 int nRead; LhXUm while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) WLa!.v> { %+>s#Q2d nStartPos += fileAccessI.write(b,0,nRead); "syh=BC
v //if(nThreadID == 1) p?D2)( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <*!i$(gn } U9y|>P\)T JA)?p{j tR0pH8?e" Utility.log("Thread " + nThreadID + " is over!"); z4#(Ze@u~_ bDownOver = true; !" #9<~Q,p //nPos = fileAccessI.write (b,0,nRead); <h).fX } PNOGN|D catch(Exception e){e.printStackTrace ();} oX@ya3!Pz } )tHaB, } LVJI_ O{fH 7hW+T7u? ._w8J"E5 //打印回应的头信息 :<Y}l-x public void logResponseHead(HttpURLConnection con) [D-Q'"'A { 9^"b*&>P for(int i=1;;i++) g"s$}5{8: { ,#FLM` String header=con.getHeaderFieldKey(i); 9E2j! if(header!=null) acP+3u?r //responseHeaders.put(header,httpConnection.getHeaderField(header)); aprm0:Q^ Utility.log(header+" : "+con.getHeaderField(header)); Zn=T#o else kE8>dmH23 break; Wz4&7KYY } zya5Jb:Sg } \Ng\B.IQ \<Sv3xy&O QxuhGA public void splitterStop() p.I.iAk%G^ { 7(M(7}EKA bStop = true; w=]Ks'C] } %W,D;?lEo> X"gCRn%tn A[IL
H_w } NjPDX>R\K ^D^4
YJz p.}Ls)I /* ]5~s"fnG **FileAccess.java \!IMaB] *//文件访问(定位,写) 2sNK package NetFox; :@W.K5 import java.io.*; NNhL*C[_7 Xs&TJ8a MV_Srz public class FileAccessI implements Serializable{ 0]QRsVz+ ETp%s{8 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y@2epY?{ RandomAccessFile oSavedFile; j'[m:/ long nPos; ^ -FX yR{x}DbG b" xmqWa public FileAccessI() throws IOException CT0l!J~5m~ { C%*k.$#r! this("",0); Mb3}7 @/[ } %ms'n -jgysBw+Xb M/x >51< public FileAccessI(String sName,long nPos) throws IOException }N_NvY { Pe C7 oSavedFile = new RandomAccessFile(sName,"rw"); yC
77c= this.nPos = nPos; hA\K</h. oSavedFile.seek(nPos); [."[pY } `V)Z)uN{0 p a}*E ]yjl~3 public synchronized int write(byte[] b,int nStart,int nLen) 9/+Nj / { :o:e,WKxb int n = -1; %WqNiF0- try{ {`2R,Jb%S oSavedFile.write(b,nStart,nLen); E?(xb B n = nLen; #r
PP* } 7+x? "4 catch(IOException e) ]9}HEu;1M { tm7u^9] e.printStackTrace (); sr@j$G#uW5 } r{L4]|(utY QwhRNnE= PoEqurH0 return n; r=yK,d/1 } AiD[SR Fnk_\d6Ma ?+T^O?r|O } >]o}}KF? .0R v(Y \om%Q[F7a /* {3N'D2N **SiteInfoBean.java L4uFNM] */ eZ"1gYqy package NetFox; Bgmn2- iC
iZJ" RwS@I/ public class SiteInfoBean { Y>jiXl?&
"c}@V*cO<d 5*[2yKsTi private String sSiteURL; //Site's URL 7ugZE93! private String sFilePath; //Saved File's Path O;7)Hjw t private String sFileName; //Saved File's Name f|u#2!7 private int nSplitter; //Count of Splited Downloading File 7JSNYTH eNiaM6(J jA#/Z public SiteInfoBean() [r/k% < {//nSplitter的缺省值为5 s; UH] //default value of nSplitter is 5 PRNoqi3sY this("","","",5); ~ %B<
} v]B
L[/4 ;S xFp gm9mg*aM public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5k|9gICyd* { i-yy/y-N sSiteURL= sURL; @
P|LLG' sFilePath = sPath; OFje+S sFileName = sName; 1Bxmm# this.nSplitter = nSpiltter; r!
Ay:r Y.^=]-n, dMR3)CO } /%lZu^ |W<+U :$MG*/Q public String getSSiteURL() *,Bzc Z { Vf(6!iRP@ return sSiteURL; };'\~g,1 } nC{%quwh{ Zw
wqSyuGf ^&g=u5
d0 public void setSSiteURL(String value) wcDRH)AW. { !bV5Sr^ sSiteURL = value; b,8{ X< } qC'{;ko _HhbIU "vtCTl~t public String getSFilePath() xeGb?DPu { \c^45<G2qA return sFilePath; y^o@"IYu3 } v9T_& v@# b}N0n 3]?#he public void setSFilePath(String value) %Qk/_ R1 { LkQX?2>] sFilePath = value; O9:U8$* } Ali9pvE T6ENtp )?wJF<[_# public String getSFileName() ;2Q~0a| { vX ] Gf4, return sFileName; ytNO*XoR } &HSq(te vzmc}y G x`6<m!d` public void setSFileName(String value) P'Q+GRpSw { D-N8<:cA sFileName = value; s=42uKz } n("0%@ov " LJq%E XkyKBg- public int getNSplitter() IUtx!.]4 { "--t e return nSplitter; >3&O::]3 } d|4}obCt `O'`eY1f 4V~?. public void setNSplitter(int nCount) "?mJqA { ;qBu4'C)T nSplitter = nCount; T9s2bC.z55 } @gG<le6 } ES40?o*]x w|Nz_3tI \(%Y%?dy /* '? jlH0; **Utility.java jMpD+Mb */ 0>zbCubPH package NetFox; VsA'de!V4[ WVLHfkN 1IVuSp`{FU public class Utility { tY
<Z'xA? xCtmXo E}ZJ)V7 public Utility() A2|Ud_ { )Y)pmjZaG xpOg8u5 }K3x } >a}f{\Q @/k@WhFZ //线程睡眠 5ms""LD/ public static void sleep(int nSecond) ]Zmj4vK J { <mAhr try{ gynh#&r Thread.sleep(nSecond); uIZWO.OdU } "U7qo}`I catch(Exception e) 5YrBW:_OI { }*L(;r)q e.printStackTrace (); E4hLtc^
+ } 5<w g8y } 9*a=iL*Nw h9eMcCU //日志 5ls6t{Ci public static void log(String sMsg) -{ZWo:,r~q { 0tU.( System.err.println(sMsg); QV\eMuNy } ` Jdb ; v,ju!I0. F+u|HiYG public static void log(int sMsg) ,{c?ym w? { F;]%V%F.X System.err.println(sMsg); -a-(r'Qc( } [Jv@J\ } #t+d iR f%*/cpA) 8]LD]h)B" /* Z4\=*ic@ **TestMethod.java Dtj&W<NXo */ Jkek-m package NetFox; pxa( 4]E3cAJ qT^I?g"! public class TestMethod { Ng_!zrx04 )Eo)t> K>{T_) { public TestMethod() 53[~bwD { ///xx/weblogic60b2_win.exe "
W|%~h try{ ~sXcnxLz SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); D"D<+
;S# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); JeE;V![ SiteFileFetch fileFetch = new SiteFileFetch(bean); d N$Tf fileFetch.start(); E@b(1@ }
)KAEt.
catch(Exception e){e.printStackTrace ();} rh^mJUh r3PT1'P?L &c,kQo+pA } VzVc37Z>6 b1($R[ 7"C$pm6 public static void main(String[] args) j}C}:\-fY { Ct>GYk$ new TestMethod(); UNBH } HZ:6zH } g?ULWeZg5 点击下载更多相关资料
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