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/* s*;rt **SiteFileFetch.java 2%{(BT6 */ \3bT0^7B package NetFox; +hZ{/ import java.io.*; .`ZuUr import java.net.*; &mPR[{ GEs5@EH w/49O;r V public class SiteFileFetch extends Thread { {9c_T!c v?@=WG [<nmJ-V SiteInfoBean siteInfoBean = null; //文件信息Bean }+/F?_I=
% long[] nStartPos; //开始位置 &Hj1jM' long[] nEndPos; //结束位置 HKXtS>7d FileSplitterFetch[] fileSplitterFetch; //子线程对象 #TG7WF5 long nFileLength; //文件长度 %E\ pd@ boolean bFirst = true; //是否第一次取文件 'Szk!,_ boolean bStop = false; //停止标志 zcE`.)y File tmpFile; //文件下载的临时信息 $/)0iL{0 DataOutputStream output; //输出到文件的输出流 Ib}~Q@?2 .-mlV ^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) qKjUp" public SiteFileFetch(SiteInfoBean bean) throws IOException cx_$`H { 6j6P&[ siteInfoBean = bean; *eEn8rAr //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gyT3[*eh tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); y,F|L?dIq if(tmpFile.exists ()) 4yDWVd; { 6DxT(VU} bFirst = false; TjWMdoU$J read_nPos(); +'`I]K> } ;kLp}CqV else /I@`B2 { #W2#'J:l nStartPos = new long[bean.getNSplitter()]; XJguw/[wm nEndPos = new long[bean.getNSplitter()]; VD0U]~CWR } q+1SU6x'm q +*>T=k M1,1J-h 5X}OUn8 } omZ
bn w<me(!-' pcO{%]?p public void run() @D2KDV3' { [W--%=Ou //获得文件长度 $E35W=~) //分割文件 tK LAA+Z //实例FileSplitterFetch ibxtrt= //启动FileSplitterFetch线程 Y6ORI //等待子线程返回 jx-8%dxtZ try{ VK/i5yT5N if(bFirst) mF@DO$ { .{Df"e> nFileLength = getFileSize(); =G-u "QJ6 if(nFileLength == -1) kOLS<>. { /GU%{nT System.err.println("File Length is not known!"); a4D4*=!G0 } $-R9J6NN else if(nFileLength == -2) O/{W:hJjd { ;h#nal>w@S System.err.println("File is not access!"); pNzpT!}H> } *+>R^\uT else O\[Td { +Heen3 for(int i=0;i<nStartPos.length;i++) 7).zed^ { o](nK5? nStartPos = (long)(i*(nFileLength/nStartPos.length)); pTzfc`~xv } &xjeZh4- for(int i=0;i<nEndPos.length-1;i++) WgC*bp{ { #Cz6c%yK nEndPos = nStartPos[i+1]; Q=cbHDB } C@q&0\HN nEndPos[nEndPos.length-1] = nFileLength; D[iIj_CKQ } H=k`7YN } O-K!Bv^
Q ^_^rI+cTX1 x1ID6kI[{* //启动子线程 X>6VucH{\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; uyDYS for(int i=0;i<nStartPos.length;i++) ~*Ir\wE { dwt<s[k fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), u:7=Yy
: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Lu?)Rya nStartPos,nEndPos,i); /,Sd Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q`X5W fileSplitterFetch.start(); v^_<K4N` } `[J(au$z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K\GIh8L siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j']Q-s(s // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f3]u-e'b nEndPos = " + nFileLength); k^PqB+P! // fileSplitterFetch[nPos.length-1].start(); .DkDMg1US 5bzYTK&- TAt9+\' //等待子线程结束 +6*
.lRA //int count = 0; B<Ynx_95 //是否结束while循环 ~-w boolean breakWhile = false; ljrA^P,>P ~Zd n#z\ $PQlaivA while(!bStop) cMEM}Qh
T { 3*gWcPGe write_nPos(); q[3b i!Q Utility.sleep(500); Pk; 9\0k7 breakWhile = true; #dGg !D ZN ?P4#ZS $u4esg for(int i=0;i<nStartPos.length;i++) 6]}Xi:I { :;XHA8 if(!fileSplitterFetch.bDownOver) 32IN;X| { XjwTjgL< breakWhile = false; DOWUnJ;5 break; Y4Z?`TL } "A:wWb<m } Tj{!Fx^H if(breakWhile) ZtEHP`Iin
break; .6E7 R !+M H?A f41!+W= //count++; R^F99L //if(count>4) `4&\ %9 // siteStop(); DZXv3gnX } \Rp)n=| P
N_QK Z _TB\@)\ System.err.println("文件下载结束!"); T"Q4vk,3*J } ZF;S}1 catch(Exception e){e.printStackTrace ();} "MXd! } 2uWzcy ?F SAG)vmm Q$,8yTM //获得文件长度 $Y,]D*|"K public long getFileSize()
X2i<2N*@ { ~ilbW|s?=k int nFileLength = -1; YQN=.Wtc try{ aXC`yQ? URL url = new URL(siteInfoBean.getSSiteURL()); ;gm){ g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /,0t,"&Aqa httpConnection.setRequestProperty("User-Agent","NetFox"); ]hvB-R16f v!F(DP.)Z K)Db3JIIk int responseCode=httpConnection.getResponseCode(); g\(7z
P if(responseCode>=400) $zmES tcm { Ky nZzR processErrorCode(responseCode); \k1Wh-3 return -2; //-2 represent access is error ?o.G@- } J*U(f{Q( c=
a+7> ^1cqx]>E String sHeader; (tq)64XVz :za!!^ RycEM|51V for(int i=1;;i++) (`!|
Uf$ { >uuX<\cW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #Y18z5vo //Utility.log(in.readLine()); ~!A,I 9 sHeader=httpConnection.getHeaderFieldKey(i); @6D<D6` if(sHeader!=null) AN~1E@" { d ,QJf\fc" if(sHeader.equals("Content-Length")) ZY/at/v { 56bB~=c nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); v}_$9&|S break; s{q2C}=$?D } D!mhR?t } +bO{UC[ else T]vD ,I+ break; DSjo%Brd- } yQx>h6 } }]s~L9_z[' catch(IOException e){e.printStackTrace ();} 9xKFX|*$ catch(Exception e){e.printStackTrace ();} Zka;}UL&Q 1OGlD+f gEe}xI Utility.log(nFileLength); 2)8lJXM$L nK|"; 8EE7mEmLH return nFileLength; FCe503qND$ } b]Y,& 8}[+ wk/->Rz SA&wW\Ym] //保存下载信息(文件指针位置) 'RA[_Z private void write_nPos() 53T2w,? { |-|BM'Y try{ 4Ek<
5s[ output = new DataOutputStream(new FileOutputStream(tmpFile)); ;|^fAc~9{r output.writeInt(nStartPos.length); f@}( <# for(int i=0;i<nStartPos.length;i++) WIGb7}egR { W[?B@ sdSZ // output.writeLong(nPos); 9BY b{<0tS output.writeLong(fileSplitterFetch.nStartPos); <h}?0NA4 output.writeLong(fileSplitterFetch.nEndPos); bCrB'&^t } j>T''Tf output.close(); "L)pH@) } m88~+o<G% catch(IOException e){e.printStackTrace ();} aj,ZM,Ad catch(Exception e){e.printStackTrace ();} qb<gh D=j } 3edAI&a5 b#m47yTW9< a9I8WQ //读取保存的下载信息(文件指针位置) 9j"\Lr*o" private void read_nPos() /7#&qx8 { b?$09,{0 try{ L8G4K) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); yR!>80$j int nCount = input.readInt(); <(MFEIt nStartPos = new long[nCount]; >H1d9y+Z nEndPos = new long[nCount]; (wfg84 for(int i=0;i<nStartPos.length;i++) _e3'f:
{ qcot
T\rq nStartPos = input.readLong(); T82_`u nEndPos = input.readLong(); pUr[MnQLf } -0`hJ_( input.close(); x\DkS,O } m&q;.|W catch(IOException e){e.printStackTrace ();} r Lh
h catch(Exception e){e.printStackTrace ();} twtDyo(\ } K)?^b|D 0- UeFy "v1(f| a private void processErrorCode(int nErrorCode) a}K+w7VY\ { "!tB";n System.err.println("Error Code : " + nErrorCode); #+;=ijyF } .{-yveE O5Lv:qAa WFd2_oAT //停止文件下载 t}7wRTG public void siteStop() WGmCQE[/c { |DW'RopM bStop = true; 1aE/_ for(int i=0;i<nStartPos.length;i++) 1Tq$ E[ fileSplitterFetch.splitterStop(); ej;taKzj dx}/#jMa l8-jFeeMd } O[y`'z;C } 2M?lgh4" //负责部分文件的抓取 Z?.*.<"Sj **FileSplitterFetch.java hYn'uL^~[ */ WDdi}i>2 package NetFox; tZ^;{sM /wE_eK. !5j3gr~ import java.io.*; aS vE import java.net.*; $O'2oeM <o+
7U p2vBj. *J public class FileSplitterFetch extends Thread { lM,zTNu-z \&5@ yh `M ygDG+u String sURL; //File URL Wk?|BR]O long nStartPos; //File Snippet Start Position {*;]I?9Al long nEndPos; //File Snippet End Position 0>=) int nThreadID; //Thread's ID "t:.mA<v boolean bDownOver = false; //Downing is over <IyLLQ+v boolean bStop = false; //Stop identical tR*W-% FileAccessI fileAccessI = null; //File Access interface d7J[.^\ ;j U-< .)>/!|i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException S}^s5ztm { =t$mbI this.sURL = sURL; }Tr83B| this.nStartPos = nStart; _qt;{,t this.nEndPos = nEnd; ^HFU@/ nThreadID = id; i @9Qb fileAccessI = new FileAccessI(sName,nStartPos);//定位 ; axaZV } P}9Y8$Y>U u rXb!e{l E#$_uZ4 public void run() $Kz\
h#} { ./nYXREO| while(nStartPos < nEndPos && !bStop) @MZ6E$I { 7e4tUAiuU 2${,%8"0s I^O:5x>[l try{ }gi1?a59 URL url = new URL(sURL); K-5"# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _jrA?pY httpConnection.setRequestProperty("User-Agent","NetFox"); /-{O\7-D String sProperty = "bytes="+nStartPos+"-"; ]2\2/~l httpConnection.setRequestProperty("RANGE",sProperty); qa$[L@h> Utility.log(sProperty); 7
Mki?EG B#GZmv1 ~I\r1Wj; InputStream input = httpConnection.getInputStream(); 0|s$vqc //logResponseHead(httpConnection); |t 65#1 L2>?m`wp ccN &h byte[] b = new byte[1024]; ;8L+_YCa int nRead; h`EH~ W0:z while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _WDBG { i. u15$ nStartPos += fileAccessI.write(b,0,nRead); UQ$\
an' //if(nThreadID == 1) 1Fvv/Tj // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); lYZ@a4TA } /R(U>pZ *]:G7SW{ @8M'<tr<z Utility.log("Thread " + nThreadID + " is over!"); >|_gT%]5 bDownOver = true; ;H
y!0n //nPos = fileAccessI.write (b,0,nRead); F`;TU"pDf } Ng."+& catch(Exception e){e.printStackTrace ();} ^C:{z)"h } 0l(E!d8&' } Q_dXRBv=n 3)C6OF>7
lk*0c{_L //打印回应的头信息 |%:qhs, public void logResponseHead(HttpURLConnection con) gQI(=in { C NzSBm for(int i=1;;i++) hpqHllL { m0BG9~p| String header=con.getHeaderFieldKey(i); _cxm}*}\# if(header!=null) x;ERRK //responseHeaders.put(header,httpConnection.getHeaderField(header)); }"&n[/8~ Utility.log(header+" : "+con.getHeaderField(header)); (b`4&sQ< else {hvQ<7b break; c6?c>*z } 8"?Vcw& } .fLiX x RR~sEUCo{ Eo7 _v public void splitterStop() zH=/.31Q { PEX26== bStop = true; ,yHzo } |z!q
r}i 1kvPiV=X> (1kn): } 12:h49AP .KiPNTh' Pg*?[^* /* "%.|n| **FileAccess.java IL+#ynC *//文件访问(定位,写)
w2uRN? package NetFox; 9D{u,Q V import java.io.*; (!3Yc:~RE ~4MtDf ;1{iF2jZ: public class FileAccessI implements Serializable{ D+ah ok I<D&,LFH*w //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 "xe7Dl RandomAccessFile oSavedFile; dp"<KcP_ long nPos; Eonq'Re$ LKK{j,g7 AI^AK0.L public FileAccessI() throws IOException RJtixuvh@ { tl{]gz this("",0); -,K*~z.l } Ek"YM[ u4Y6B
]Q qO:U]\P public FileAccessI(String sName,long nPos) throws IOException otWo^CE$ { Qq`3S> oSavedFile = new RandomAccessFile(sName,"rw"); fap|SMGt this.nPos = nPos; 8eOl@}bV oSavedFile.seek(nPos); i>ESEmb- } 17V\2=Io 4'+d"Ok paq8L{R public synchronized int write(byte[] b,int nStart,int nLen) SjZd0H0 { q
Axf5 int n = -1; K:}h\ In try{ KcIc'G 9 oSavedFile.write(b,nStart,nLen); $x;tSJ)m~ n = nLen; t!6\7Vm/ } tpv?`(DDU catch(IOException e) q1N4X7<_ { Nbgp_:{ e.printStackTrace (); 3mpP|b" } C$KaT3I )v${&H !d:tIu{) return n; 'b LP~ } )vO_sIbnW P/FrE~ f?2zLE>u } cj$,ob&DX re7!p(W?, 6tOP}X /* |C~Sr#6)7 **SiteInfoBean.java 5\uNEs$T */ aF D="Zh package NetFox; qv.[k<~a> S/a/1n$ U I|$'Q$m~ public class SiteInfoBean { xg(<oDn+\ R|/Wz/$1A 8r2XGR private String sSiteURL; //Site's URL 5kK=S private String sFilePath; //Saved File's Path q A.+U:I8 private String sFileName; //Saved File's Name Us1@\|] private int nSplitter; //Count of Splited Downloading File 4#TnXxL Sq?,C&LsA w(aUEWYL public SiteInfoBean() 4DvdEt {//nSplitter的缺省值为5 >r~0SMQr //default value of nSplitter is 5 <inl{CX/ this("","","",5); *^n^nnCwp } 55LgBD {PL,VY)Z _wMc*kjJO public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) fv:L\N1u { yxqTm%?y sSiteURL= sURL; A8J?A#R*{q sFilePath = sPath; TV<Aj"xw sFileName = sName; TV?
^c?{5 this.nSplitter = nSpiltter; cS4xe(n8 "pYe-_"@ '=$TyiU } 7Ez}k}aR< m^z,,t9 6{L F-`S% public String getSSiteURL() 2ed@HJu { OO$|9`a return sSiteURL; T)`gm{T } \Ph]*% n>n"{! gEE9/\>%- public void setSSiteURL(String value) se!g4XEWD { /=bSt sSiteURL = value; 9wzwY[{ } [@g ~ qv.n9 9?] (s&ORoVGn public String getSFilePath() Dp^95V@ { _'&k#Q return sFilePath; R !9qQn? } 1p~5h(jI $]Jf0_ YjX*)Q_sl? public void setSFilePath(String value) Mg+4huT { )t5;d sFilePath = value; _$!`VA% } t]4!{~, _g65pxt =Z ;e2Ij public String getSFileName() Y4`QK+~fH { 'g2vX&=$A return sFileName; `6UtxJSx } FQ1arUOFW, IOX:yxj >C:If0S4X public void setSFileName(String value) Q]^Yi1PbS { URLk9PI sFileName = value; 9]Lo } /;7ID41 RU7!U mf n? }5! public int getNSplitter() Qd?CTYNsv { ,b4g.CV return nSplitter; Q4=|@|U0 } j6HR&vIM /-><k,mL? t|<FA# public void setNSplitter(int nCount) vn ``0!FX { %/Bvy*X& nSplitter = nCount; &/iFnYVhy } {!MVc<G. } XO%~6Us^ B 2Qp} g1ytT%] /* !D7"=G}HD **Utility.java uS&LG#a */ @ R UP$ package NetFox; ![).zi+m W~<m[#:6C %2}C'MqS public class Utility { Fav^^vf*1 `On3/gU| 9{$8\E9*nd public Utility() UP]1(S? { Qww^P/vm P2t_T'R} `\ R{5TU } aLYLd/ KV e6 2y //线程睡眠 o)p[
C
public static void sleep(int nSecond) 0 7\02f { Co[n--@C try{ "9ue76 Thread.sleep(nSecond); VVFV8T4 } c_Tzyh7l4 catch(Exception e) K\aAM;)- { E23w *'] e.printStackTrace (); N ocFvF7\ } ZtR&wk } u1N1n;# 0E1=W6UZ //日志 p/3BD&6 public static void log(String sMsg) @701S(0'7 { R:f7LRF/\ System.err.println(sMsg); _YLUS$Zw } :/i~y $t ~z`/9; Dkw*Je#6PX public static void log(int sMsg) ED/FlL{ { Oy%Im8.-A# System.err.println(sMsg); r:NH6tAL } (AuPZ } Zih ?Bm [;FofuZ g|4w8ry /* oq. r\r
**TestMethod.java L+t[&1cW */ '?8Tx&}U8 package NetFox; h0lu!m#\_ Um\0i;7 ~4 (6clq:c7j public class TestMethod { 6__K#r r0{]5JZt/ akCIa'>t public TestMethod() |xeE3,8 { ///xx/weblogic60b2_win.exe JGgxAd{L try{ GS4_jvD- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); n_9x"m$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); [e1L{ _*l
SiteFileFetch fileFetch = new SiteFileFetch(bean); 8lb-}= fileFetch.start(); ESv:1o`?n } SK-W%t catch(Exception e){e.printStackTrace ();} D%gGRA !+KhFC&Py H`el#tt_ } t!~S9c o|rzN\WJn :1MMa6 public static void main(String[] args) %E.S[cf%8& { gl
"_:atW new TestMethod(); HTR1)b } hy!6g n } IT&i,`cJ~F 点击下载更多相关资料
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