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/* +)j ll#}? **SiteFileFetch.java UlE%\L0GD& */ EaO@I.[ package NetFox; DdgiY9a. import java.io.*; V >' import java.net.*; #lLUBJ#: ]zSFX
=~(S g8%O^)d=> public class SiteFileFetch extends Thread { &P|[YP37_ x [FLV8`b| :BF ? r SiteInfoBean siteInfoBean = null; //文件信息Bean
[fa4 long[] nStartPos; //开始位置 A>yU0\A long[] nEndPos; //结束位置 l:!L+t*}6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ilL0=[2 long nFileLength; //文件长度 !rM~ boolean bFirst = true; //是否第一次取文件 1jl!VU6 boolean bStop = false; //停止标志 E6A"Xo File tmpFile; //文件下载的临时信息 `S@TiD* DataOutputStream output; //输出到文件的输出流 )O~[4xV~ .z`70ot? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) GrL{q;IO public SiteFileFetch(SiteInfoBean bean) throws IOException ^QRg9s,T< { xLz=)k['' siteInfoBean = bean; -[V-f> : //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^[tE^(|T tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p?:5U[KM if(tmpFile.exists ()) 5:h[%3'bB { cqNK`3:.j bFirst = false; ((k"*f2% read_nPos(); -Ks>s } w6%
Q"%rp else m.e]tTe { f
V. c6 nStartPos = new long[bean.getNSplitter()]; !.]JiT'o nEndPos = new long[bean.getNSplitter()]; 7z{wYCw } q!5:M\ %SM;B-/zHt _8VP'S= senK(kbc } az(<<2= PLyity-L[7 Cl}nPUoL public void run() Nz,yd%ua { R2~Tr$: //获得文件长度 iEr,ly //分割文件 `
R6`"hx$ //实例FileSplitterFetch \2i7\U //启动FileSplitterFetch线程 I0)`tQ+ //等待子线程返回 w
)R5P[b try{ JbMTULA if(bFirst) _/s"VYFZ { i6`"e[aT[o nFileLength = getFileSize(); @p+;iS1} if(nFileLength == -1) |7s2xRc { bmfM_oz System.err.println("File Length is not known!"); V8?}I)#(7 } K9lgDk"i else if(nFileLength == -2) g7*)|FOb { yw3"jdcl System.err.println("File is not access!"); W lMcEje } |"3<\$[ else 7;"0:eX { 11[lc2 for(int i=0;i<nStartPos.length;i++) :gh[BeqQ) { ?{{w[U6NE nStartPos = (long)(i*(nFileLength/nStartPos.length)); |cPHl+$nh. } %BqaVOKJ"f for(int i=0;i<nEndPos.length-1;i++) k9^Hmhjw { IHl q27O nEndPos = nStartPos[i+1]; ^OR0Vp>L } 5'~_d@M nEndPos[nEndPos.length-1] = nFileLength; _kj]vbG^; } SUncQJJ0S* } RK>Pe3< #WpkL]g2+% WNjwv/ //启动子线程 > VG fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Ccf/hA#mb for(int i=0;i<nStartPos.length;i++) +eM${JyXH { XpIiJry!6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a&y^Ps6= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), c7Z4u|G nStartPos,nEndPos,i); Zp_(vOc Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;?-AFd\i fileSplitterFetch.start(); o`?rj!\ } woYD &Oml // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ie}OZM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5,RUPaE // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", T(4d5 fY nEndPos = " + nFileLength); w2)Ro:G // fileSplitterFetch[nPos.length-1].start(); mo0\t#jA o\AnM5 L[` l80 //等待子线程结束 s[1ao"sZ^ //int count = 0; lo1Ui`V //是否结束while循环 ]rmBM boolean breakWhile = false;
5\- uo iHK~?qd} ^[L(kHOGzk while(!bStop) J~Xv R { ] $ew 5% write_nPos(); [uq>b|`RG Utility.sleep(500); pMc6p0 breakWhile = true; fCl}eXg6w ]Z JoC!u DHidI\*gT for(int i=0;i<nStartPos.length;i++) (JhX:1 { c}x1-d8 if(!fileSplitterFetch.bDownOver) X'9.fKp { X|M!Nt0' breakWhile = false; E-MPFL break; +jN}d=N- } !XA3G`}p6s } 7p&jSOY if(breakWhile) XX;4A break; 30Yis_l2h .p`4>XA g8),$:Uw //count++; )^h6'h` //if(count>4) cH]tZ$E` // siteStop(); dn6B43w } KWwtL"3 W+XWS,( xS18t=" System.err.println("文件下载结束!"); 3:%k
pnO } j jpYg catch(Exception e){e.printStackTrace ();} *OVB;]D3+ } 6 Z/`p~e ;`9f<d#\ 1C[9}} //获得文件长度 y!e]bvN public long getFileSize() }fpya2Xt { fGgt[f[ int nFileLength = -1; ;?6vKpj; try{ 4 p_C+4 URL url = new URL(siteInfoBean.getSSiteURL()); &[.5@sv HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y>{:[L9* httpConnection.setRequestProperty("User-Agent","NetFox"); :fRXLe1= qZoDeN-CC UN I< r int responseCode=httpConnection.getResponseCode(); b^Hrzn if(responseCode>=400) p:,Y6[gMo { ~Eut_d processErrorCode(responseCode); ^S#; return -2; //-2 represent access is error yTaMlT| } -H1=N E' 5*w6 f49kf** String sHeader; @|!4X(2 |J`EM7qMK TyxIlI4" for(int i=1;;i++) :-&|QVH { -"(*'hD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r^9l/H~$ //Utility.log(in.readLine()); 4.6$m sHeader=httpConnection.getHeaderFieldKey(i); f*ZU a if(sHeader!=null) Z1Qz
LvWs { 1CtUf7 `/Q if(sHeader.equals("Content-Length")) ^({)t { c=\tf~}^Ms nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T.q2tC[bR break; b`0tfXzS5 } Nk~}aj } ` ]|X_!J- else UuG%5 ZC break; F[qXIL) } t2&kGf" } :WhJDx`j
catch(IOException e){e.printStackTrace ();} sW^M
] catch(Exception e){e.printStackTrace ();} &K[*vyD 2:+8]b 3i |@ mz@ Utility.log(nFileLength); xh6(~'$ |9@,ri\'Rg 0SpB2>_ return nFileLength; h!"2Ux3!x } >T$0*7wF W?7l-k=S LS@TTiN
//保存下载信息(文件指针位置) s"(RdJ-, private void write_nPos() *k$[/{S1- { D)* try{ O5dS$[`j\p output = new DataOutputStream(new FileOutputStream(tmpFile)); ~z[`G#dU output.writeInt(nStartPos.length); /i+z#q5' for(int i=0;i<nStartPos.length;i++) Q @}$b(b { 0'q4=!l // output.writeLong(nPos); H7O~So*N5 output.writeLong(fileSplitterFetch.nStartPos); =4ygbk output.writeLong(fileSplitterFetch.nEndPos); M!mL/*G@YE } AbU`wr/h 4 output.close(); $0* sjXV } F?L]Dff catch(IOException e){e.printStackTrace ();} jKS j ); catch(Exception e){e.printStackTrace ();} , c.^"5 } _h%Jf{nu
gqaM<!] u#05`i:Z //读取保存的下载信息(文件指针位置) !_glZ*tL private void read_nPos() Q+CJd>B { ; :e7Z^\/k try{ ! FcGa DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); KbJ6U75|f int nCount = input.readInt(); ^0,}y]5p nStartPos = new long[nCount]; aRd~T6I nEndPos = new long[nCount]; 6]4~]! for(int i=0;i<nStartPos.length;i++) +cpb!YEAb { 1nVQYqT_ nStartPos = input.readLong(); 2g(_Kdj*{ nEndPos = input.readLong(); qLR;:$]Q&8 } +in)(a. input.close(); ?pL|eS7 } tX*@r catch(IOException e){e.printStackTrace ();} O7.V>7Y9H catch(Exception e){e.printStackTrace ();} UlXm4\@ } 9~p;iiKGG EPo)7<|> ZbRRDXk! private void processErrorCode(int nErrorCode) )1 <0c@g= { PW*Vfjf4 System.err.println("Error Code : " + nErrorCode); x;ik
} K'OG-fn;
'CBwE&AL wGHft`Z //停止文件下载 Q\oa<R
D5 public void siteStop() ~z^l~Vyg? { |N,^*xP(6 bStop = true; 4+olyBht for(int i=0;i<nStartPos.length;i++) pEB3qGA fileSplitterFetch.splitterStop(); 8X;?fjl`" !~^2Mu(X g |)>65v } N2h5@*1Y } "|\hTRQ //负责部分文件的抓取 3Vu}D(PJ **FileSplitterFetch.java >=k7#av */ a%q,P @8 package NetFox; %p7
?\> + V=<vT d`\SX(C import java.io.*; U$:^^Zt`B import java.net.*; [*%lm9 x l|g*E.:4 '!>9j,BJ public class FileSplitterFetch extends Thread { <I,4Kc! <3Ftq= ?Ld),A/c String sURL; //File URL ~B<\#oO long nStartPos; //File Snippet Start Position 4vg,g(qi< long nEndPos; //File Snippet End Position O"9t,B>=i int nThreadID; //Thread's ID zJ`u>:*$ boolean bDownOver = false; //Downing is over ,7nu;fOT[ boolean bStop = false; //Stop identical (nqhX<T> FileAccessI fileAccessI = null; //File Access interface jMT[+f r$<!?Z -J]?M public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0GMb?/
{ /cS8@)e4 this.sURL = sURL; \mF-L,yu this.nStartPos = nStart; <XL%* this.nEndPos = nEnd; 6 `6I<OJ\ nThreadID = id; Z@Rqm:e fileAccessI = new FileAccessI(sName,nStartPos);//定位 /X8a3Eqp9 } mtUiO
p [_N1
.}e LM<*VhX public void run() V7$ m.P#uM { Yjg$o:M while(nStartPos < nEndPos && !bStop) 3P_.SF { 1@Ba7>%' H c/7x). e`Yj}i*bx] try{ h!B{7J URL url = new URL(sURL); -O})Y>=} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $GoS?\G httpConnection.setRequestProperty("User-Agent","NetFox"); j,rc9 String sProperty = "bytes="+nStartPos+"-"; 8;M,l2pmR{ httpConnection.setRequestProperty("RANGE",sProperty); \t{iyUxY Utility.log(sProperty); Jq1oQu|rs 6@aH2+4+ CI+)0=`<1B InputStream input = httpConnection.getInputStream(); x.t<@y~ //logResponseHead(httpConnection); ;apLMMsWC g.\b@0Uy' AB
$N`+& byte[] b = new byte[1024]; (~@.9&cBD int nRead; S1k*">< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Q_T,=y { d 6Y9D=O
nStartPos += fileAccessI.write(b,0,nRead); ['QhC( { //if(nThreadID == 1) $y;w@^ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); II^Rp],> } ~U+<JC Z h`Jc%6o <mX5VGY9^ Utility.log("Thread " + nThreadID + " is over!"); J
rK{MhO bDownOver = true; dC<%D'L* //nPos = fileAccessI.write (b,0,nRead); h5{//0 y } s?<FS@k catch(Exception e){e.printStackTrace ();} 58?WO} } 28JVW3&) } *wAX&+); E[hSL#0 /A5=L<T6F //打印回应的头信息 u%L6@M2 public void logResponseHead(HttpURLConnection con) Wz^;:6F { oD%n} for(int i=1;;i++) QeY+imM { 9f['TG," String header=con.getHeaderFieldKey(i); v~RxtTu if(header!=null) u!xgLf'` //responseHeaders.put(header,httpConnection.getHeaderField(header)); :qS~"@ ?< Utility.log(header+" : "+con.getHeaderField(header)); Qc33CA else yO-2.2h break; (muJ-~CJk } '+_-r'2 } "P.sKhuo [6@bsXiw Sw$&E public void splitterStop() [1~3\-Y { %B&O+~ bStop = true; `-nSH)GBM } bSM|" {?
yRO] C\rT'!Uk\Q } Zy Df@(z` DmoY],9I+p VK9E{~0= /* bO6z;D# **FileAccess.java x~l"'qsK *//文件访问(定位,写) \>T1&JT package NetFox; 1`II%mf[ import java.io.*; 8<Nz34Y JAW7Y:XB M|y!,/' public class FileAccessI implements Serializable{ 'Q'-7z-6 yR F+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B8cg[;e81 RandomAccessFile oSavedFile; qPN long nPos; %to.'R 57 Vn- Jbima> public FileAccessI() throws IOException m:EYOe,w { ")boY/ P/w this("",0); q89yW)XG } a"+VP>4 b6 g9! WOYZ public FileAccessI(String sName,long nPos) throws IOException |/-# N { AED
9vDE oSavedFile = new RandomAccessFile(sName,"rw"); D9(4%^HxV1 this.nPos = nPos; 9(&$Gwi oSavedFile.seek(nPos); ,g P;XRe1 } .>`7d=KT EZ Q!~ q9(O=7O]- public synchronized int write(byte[] b,int nStart,int nLen) E?0RR' { _#<l -R` int n = -1; *nM.`7g*[ try{ ~9fTs4U oSavedFile.write(b,nStart,nLen); yYC\a7Al4 n = nLen; DL_M#c`< } hHt.No catch(IOException e) ;r;>4+zn\ { Yk4ah$}%-^ e.printStackTrace (); xoSBMf } (yu0iXZY }Ny~.EV5^ I1ibrn return n; yC}x6xG } g2lv4Tiq- )P/~{Ci:T& @S012} xH } [o'}R`5) +w?1<Z v|kL7t)} /* QD[l 6 **SiteInfoBean.java IetV ]Ff6 */ Z${@;lgP package NetFox; B@3>_};Ct BW)t2kR& [s!c c:JR public class SiteInfoBean { )o_$AbPt 87VXVI `tsqnw private String sSiteURL; //Site's URL i];@ e] private String sFilePath; //Saved File's Path 3~0Xe private String sFileName; //Saved File's Name 4p&SlJ private int nSplitter; //Count of Splited Downloading File nYY' hjZ MU_
>+Wnf b~G|Bhxa public SiteInfoBean()
BgG+ {//nSplitter的缺省值为5 0xutG/-&N //default value of nSplitter is 5 64!V8&Ay this("","","",5); !91<K{#A{ } ]_)=xF19 gtP;Qw' Kib?JRYt public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) l\-(li
H { YwM;G
g3 sSiteURL= sURL; E?f*Z{~, sFilePath = sPath; qoD
M!~ sFileName = sName; j[1^#kE this.nSplitter = nSpiltter; u`X}AKC U#_rcu t#J
#DyY5 } p&\x*~6u [26([H YI?y_S public String getSSiteURL() BUKh5L { !NOvKC! return sSiteURL; Y|i!\Ae } [+y/qx79
o;:a6D`
7~q'3 N public void setSSiteURL(String value) Y-,1&$& { 0r\hX6 k sSiteURL = value; Ol@
YSk d } \+w -{"u$ V/!8q`lYNJ ]pA}h.R#- public String getSFilePath()
!*xQPanL { Ts:pk return sFilePath; WS0RvBvb } BPKeG0F7 :U;ZBs3 L``K. DF public void setSFilePath(String value) P3YG:* { bsmnh_YRj sFilePath = value; B6Tn8@O } (iiyptJ tL4xHa6v] \h"QgHzp public String getSFileName() |5,q54d(K { ,G,T&W return sFileName; e~weYGK } F3a"SKMW [w)6OT 7<?v!vQ}- public void setSFileName(String value) Hca)5$yL { Pz +8u&~p sFileName = value; I|$_[Sw } [H)p#x \9BIRY` _hLM\L public int getNSplitter() Hp":r%) { NLF{W|X return nSplitter; |^@TA=_ } o0Hh&:6!M L+QEFQ:r5 $y> J= public void setNSplitter(int nCount) 413r3/ { >[Q(!Ai nSplitter = nCount; femAVx}go } aX1|&erI } #tBbvs+% F+AShh y#Ch /Jg?| /* i@_|18F]` **Utility.java M ~!*PCd5 */ (F7!&] 8% package NetFox; J74nAC%J^ crC];LMl/ 7z6y n=B public class Utility { c{#lKD<7 82Vxk eA_1?j]E3 public Utility() <
v_ ?} { 2Sb~tTGz79 f5/ba9nI q@u$I'`Bs } h_d!G+-] qx53,^2 //线程睡眠 Z!|nc. public static void sleep(int nSecond) <H E'5b { Jo
h&Ay try{ K#";! Thread.sleep(nSecond); 88)0Xi|]KP } WohK,<Or catch(Exception e) .'7o,)pJ< { dmrM %a}W- e.printStackTrace (); #ZGWU_l} } TiF$',WMv } }kXF*cVg Khw!+!(H //日志 IEeh)aj[ public static void log(String sMsg) Q:kpaMA1P { %r~TMU2" System.err.println(sMsg); hlkf|H } E9226 .Fh5:WN 8X*6i-j5E public static void log(int sMsg)
[?Aq#av { ~Cj+6CrT System.err.println(sMsg); <6n(a)L1 } JYKA@sZHe } [>?B`1;@ |TEf? <"c I%*o7" /* +5);"71 **TestMethod.java ;Cyt2]F */ w>VM-- package NetFox; 3r^i>r8B D@d/O ycCEXu2F public class TestMethod { Te!q(;L`4 6eK18*j%H Fv5@-&y$W public TestMethod() XF{}St~ ( { ///xx/weblogic60b2_win.exe 31YzTbl[H try{ )Cyrs~ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6]Ppa ~Xwq //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); M*+_E8Lh SiteFileFetch fileFetch = new SiteFileFetch(bean); ga~rllm;i fileFetch.start(); 0V`0=" rQ } qz(0iZ] Y catch(Exception e){e.printStackTrace ();}
@oug^]a k9WihejS A*~zdZ p } 7PP76$ .wS' Xn& xk.\IrB_ public static void main(String[] args) }3^t,>I=,6 { ?OvtR:h C new TestMethod(); X )g<F } M_UhFY=' } OES+BXGX 点击下载更多相关资料
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