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/* nX~sVG{Q **SiteFileFetch.java )Fbkt(1 */ '<O&
: package NetFox; N?aU<-Tn import java.io.*; K.k=\N import java.net.*; +g*Ko@]m> ey:3F% \;~>AL* public class SiteFileFetch extends Thread { -LF^u;s8&S Tg[+K+ b qzXch["So SiteInfoBean siteInfoBean = null; //文件信息Bean F"_SCA?9? long[] nStartPos; //开始位置 -YYQnN long[] nEndPos; //结束位置 z5?xmffB FileSplitterFetch[] fileSplitterFetch; //子线程对象 U_+>4zdm long nFileLength; //文件长度 XWk^$ " boolean bFirst = true; //是否第一次取文件 Xln'~5~) boolean bStop = false; //停止标志 \ /o`CV{O File tmpFile; //文件下载的临时信息 ie5" DataOutputStream output; //输出到文件的输出流 (%".=x- =2<
>dM#` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 75a3H` public SiteFileFetch(SiteInfoBean bean) throws IOException h_J'dJS { ,oR}0(^"\< siteInfoBean = bean; ,>)/ y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); m}k rG tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Rh%x5RFFc if(tmpFile.exists ()) P*_Q 8I)Y { y'{0|Xj bFirst = false; 6j0!$q^ read_nPos(); ;s{rJG{inG } P66>w})@ else (sZB- { yPW?%7 h nStartPos = new long[bean.getNSplitter()]; I~Ziq10 nEndPos = new long[bean.getNSplitter()]; mN,Od?q[ } V^"5cW /Ue~W,| MSu_*&j9T R{/nlS5 } vU::dr J 5~bs*a8 ">|fB&~A public void run() ?me0J3u_ { Bc$t`PI //获得文件长度 (c_E*>c) //分割文件 ,
j7&(V~ //实例FileSplitterFetch qXgg"k%A\ //启动FileSplitterFetch线程 \G2& //等待子线程返回 PKk_9Xd try{ WEZ)7H if(bFirst) M1^pf<!s { A^xDAxk nFileLength = getFileSize(); +n7bbuxj(X if(nFileLength == -1) M,zUg_ @ { d(<[$3. System.err.println("File Length is not known!"); .z+[3Oj_E } #Fq6-]y1") else if(nFileLength == -2) {eL XVNR7R { ;V@o 2a System.err.println("File is not access!"); G 7b>r } &G:#7HX@- else ;>bcI). { EHmw(%a|+ for(int i=0;i<nStartPos.length;i++) i.Yz)Bw { +TL5yuA nStartPos = (long)(i*(nFileLength/nStartPos.length)); (U4]d` } ~m'PAC"Q$ for(int i=0;i<nEndPos.length-1;i++) dL!PpLR$2 { >yiK&LW^? nEndPos = nStartPos[i+1]; :T.j;~ } `*^
f =y nEndPos[nEndPos.length-1] = nFileLength; fnl~0 } %8s$l'Q; } Xi$2MyRd sk6C/ '0: B
E!HM{- //启动子线程 cyL"?vR*< fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; R^4JM,v9x` for(int i=0;i<nStartPos.length;i++) }Ndknut, { #!qa#.Yi fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xgou7x< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3w6}%=)$8 nStartPos,nEndPos,i);
F$X"?fj Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?U$H`[VF} fileSplitterFetch.start(); 4-1=1)c* } +G)L8{FY( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hX;JMQ915 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); e'Njl?>3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5o- WA1 nEndPos = " + nFileLength); `saDeur#X // fileSplitterFetch[nPos.length-1].start(); D<%/:M Wb4+U;C^!' .'aW~WR //等待子线程结束 hj[&.w //int count = 0; u 6A!Sw //是否结束while循环 Xy0*1$IS] boolean breakWhile = false; SHWD@WLE4 +es|0;Z4yP j6}/pe*;;T while(!bStop) O!xul$9 { N;gI %6 write_nPos(); ?>
)(;Ir9 Utility.sleep(500); u)J&3Ah% breakWhile = true; Mwm9{1{ cHP~J%&L <a_ytSoG1 for(int i=0;i<nStartPos.length;i++) 6_}&
WjU' { 4Cm+xAXG if(!fileSplitterFetch.bDownOver) Vh=10Et { U~H]w,^ breakWhile = false; .d/e?H: break; ,%Sf,h?"^ } Qx<86aKkF } w`ebZa/j if(breakWhile) ?y"=jn break; .Aj4?AXWc H+lBb$ [ 'aSPA //count++; `?P)RS30 //if(count>4) pQ2'0u5w5 // siteStop(); nz+k , } nymro[@O~ )a99@`L\P T3H\KRe6 System.err.println("文件下载结束!"); ol#|
.a2O } tg5G`P5PJ catch(Exception e){e.printStackTrace ();} Ct@O S227x } % XvJJ ;fiH=_{us 9IfeaoZZ4q //获得文件长度 so=Ux2 public long getFileSize() KcPI,.4{ { Cg#@JuwHa int nFileLength = -1; 4 s&9A/&pC try{ s[2>r#M URL url = new URL(siteInfoBean.getSSiteURL()); JA!?vs HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S~GL_#a httpConnection.setRequestProperty("User-Agent","NetFox"); <e)u8+( 7:Cq[u fl Le,e,#hiY int responseCode=httpConnection.getResponseCode();
LeEv'] if(responseCode>=400) ;Gnk8lIsb { J) I|Xot processErrorCode(responseCode); (?y (0%q return -2; //-2 represent access is error lE|Hp } 3]MSS\uB ']Z1n b Cr&,*lUo String sHeader; =pa
F6!AB R%EpF'[~[ y*oH"]D for(int i=1;;i++) Ng,<4; { qL;u59 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S:F8`Gh //Utility.log(in.readLine()); 4arqlzlo sHeader=httpConnection.getHeaderFieldKey(i); {)KH% if(sHeader!=null) "Qci+Qq { FV~ENpncP if(sHeader.equals("Content-Length")) x%]5Q/|Ur { vHmsS\\~9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); BK*Bw,KQ< break; .G/>X%X } VV'*3/I } vr2cDk{ else og$%`o:{ break; jXH?os% } 1^v?Ly8 } CO5>Q o catch(IOException e){e.printStackTrace ();} K+P:g%M catch(Exception e){e.printStackTrace ();} a]]>(Txc myq:~^L
; =CqZ $ Utility.log(nFileLength); e09('SON( $_5a1Lq1 D^-6=@<3KD return nFileLength; [Z-S0 } a@?2T,$ L!qXt(` q{RH/. l //保存下载信息(文件指针位置) nm}wdel" private void write_nPos() @hV F}ybp { n,l{1 q try{ g#}a?kTM@ output = new DataOutputStream(new FileOutputStream(tmpFile)); T*3>LY+bb output.writeInt(nStartPos.length); z
Go*N,' for(int i=0;i<nStartPos.length;i++) =}pPr]Cc { N"k
IQe*}1 // output.writeLong(nPos); ~tM+! output.writeLong(fileSplitterFetch.nStartPos); UB8TrYra output.writeLong(fileSplitterFetch.nEndPos); hW Va4 } ;}W-9=81 output.close(); a9%^Jvm" } HAca'!p catch(IOException e){e.printStackTrace ();} &Cykw$s catch(Exception e){e.printStackTrace ();} _$vAitUe4S } 0x1#^dII jt6q8 #]vs*Sz //读取保存的下载信息(文件指针位置) Ex`!C]sQ private void read_nPos() ]>_Ie?L)< { v<u`wnt try{ |,)=-21&; DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); lO+6|oF0 int nCount = input.readInt(); \2U F J nStartPos = new long[nCount]; _*1{fvv0{ nEndPos = new long[nCount]; >0c4C<_ for(int i=0;i<nStartPos.length;i++) @b]?Gg { N*$L#L$* nStartPos = input.readLong(); V/,@hv`+ nEndPos = input.readLong(); Kh'7N! } BXj]]S2 input.close(); {37v.4d; } 9]]isE8r catch(IOException e){e.printStackTrace ();} CtO;_;eD' catch(Exception e){e.printStackTrace ();} 0; PV gO;9 } hH3~O`~ [OU[i(,{ EmFL
%++V private void processErrorCode(int nErrorCode) -:]-g:;/ { =ICakh!TO System.err.println("Error Code : " + nErrorCode); A@81wv
} 8p0ZIrD% S#[w).7 nMT"Rp //停止文件下载 K.P1| public void siteStop() @4FG&
>kQ { Ro:DAxi@L bStop = true; #=V[vbTY for(int i=0;i<nStartPos.length;i++) $!q(-+( fileSplitterFetch.splitterStop(); W+5<=jXFB nP5T*-~ }Kt1mmo:` } Z!eW_""wp } tQYkH$e`/{ //负责部分文件的抓取 }^a"
>$DU **FileSplitterFetch.java HA# 9y;\ */ >JUOS2 package NetFox; yZc_PC` edZhI eWw#
T^ import java.io.*; z-g"`w:Lj import java.net.*; (;6vT'hE uJ@C-/BD!M @;1Ym\zc public class FileSplitterFetch extends Thread { gAxf5A_x) u+_6V 6aq=h`Y String sURL; //File URL [,?5}'we long nStartPos; //File Snippet Start Position *^=zQ~ long nEndPos; //File Snippet End Position E,wOWs* int nThreadID; //Thread's ID ,2MLYW, boolean bDownOver = false; //Downing is over i[V\RKH*F boolean bStop = false; //Stop identical hwj:$mR FileAccessI fileAccessI = null; //File Access interface [PP&}.k4" tsf)+`vt j.:I{!R# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -qNun3 { !Sj0! \ this.sURL = sURL; W9M~2<
L this.nStartPos = nStart; %}/ |/= this.nEndPos = nEnd; "x~su?KiA nThreadID = id; #[B]\HO fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]mZN18# } \&#IK9x{ X Z4q{^o 7^<{aE: public void run() Nay&cOz { 3-6Lbe9H while(nStartPos < nEndPos && !bStop) XFmTr@\M { !U[/P6
+0 nd3n 'b S|pf.l try{ 7Bs:u URL url = new URL(sURL); (Ee5Af,4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nA4PY] httpConnection.setRequestProperty("User-Agent","NetFox"); Tk~Y String sProperty = "bytes="+nStartPos+"-"; \iQ{Q&JR: httpConnection.setRequestProperty("RANGE",sProperty); AdGDs+at, Utility.log(sProperty); e,8[fp-7 n5s2\( 6*r#m%| InputStream input = httpConnection.getInputStream(); Zog&:]P'F //logResponseHead(httpConnection); !E.CpfaC t;/s^-} ic=tVs byte[] b = new byte[1024]; H9+[T3b int nRead; &|Cd1z#? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $ts1XIK% { ,(y6XUV~ nStartPos += fileAccessI.write(b,0,nRead); HY>zgf,0 //if(nThreadID == 1) ?Jy/]j5fI // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5e|yW0o } W\1V`\gF 2uT"LW/(H 8D:0Vhx\I Utility.log("Thread " + nThreadID + " is over!"); D4IP$pAD bDownOver = true; oUNuM%g9Dy //nPos = fileAccessI.write (b,0,nRead); Dhze2q)o } Ra)AQ
n catch(Exception e){e.printStackTrace ();} _/[}PQC6G } ,qu7XFYrY } ^_5t5> d]r?mnN W 155vY //打印回应的头信息 F!qt=)V@w public void logResponseHead(HttpURLConnection con) o8c5~fG1 { <Gw>}/-^ for(int i=1;;i++) reI4!,x { .9VhDrCK String header=con.getHeaderFieldKey(i); k^Qd%;bdF if(header!=null) Z3qr2/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); Boj#r ,x Utility.log(header+" : "+con.getHeaderField(header)); >hv8zHOO: else ?)V|L~/ break; kK%@cIXS3 } CAbR+y } K*9~g(' 4`zK`bRcK# 5iZx
-M public void splitterStop() hn[lhC { opfg %* bStop = true; kps}i~Jb } |YcYWok =Ohro' T o$D[- } vf0
fa46 |*>s%nF| #I}w$j
i /* Wf{&D> **FileAccess.java awU&{<,=g *//文件访问(定位,写) vB Vg/ package NetFox; n=A}X4^ import java.io.*; ["0DXm%t iT=h}> WGA"e public class FileAccessI implements Serializable{ ,Fzuo:{uy vn1*D-? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 .kc{)d*0K RandomAccessFile oSavedFile; 5b$QXO long nPos; z`:tl7 F~C7$ 0lLg uBW@ public FileAccessI() throws IOException
Fp~0 ^ { /WMJ#IE this("",0); V\*J"ZP& } P X>>h}% ~9Cw5rwH<; 99*QfC public FileAccessI(String sName,long nPos) throws IOException >=K~*$&> { (Qd@Q,@(s oSavedFile = new RandomAccessFile(sName,"rw"); <RCeY(1 this.nPos = nPos; AsO)BeUD oSavedFile.seek(nPos); 7bL48W<QD } [PH56f =|V [^#V FV\$M6
_ public synchronized int write(byte[] b,int nStart,int nLen) F5
7Kr5X { [B@R(z=H int n = -1; icN#8\E try{ }WnoI2 oSavedFile.write(b,nStart,nLen); 2[I[I*"_d n = nLen; 9t+:L(*pK } =VGRM#+D catch(IOException e) $D;-;5[-/r { paZcTC e.printStackTrace (); `P jS }
LX</xI08W JlE b :LLz$[c8 return n; s)}EMDY } 5"z~BE7 TGzs|- -?1ed|I8 } rqEP!S^ "O<TNSbrC J5SOPG /* d=/a{lP\ **SiteInfoBean.java >x8~?)7z */ ;aImz*1%t package NetFox; bYwe/sR _Kg"l5?B no9=K4h` public class SiteInfoBean { )TOKHN /vAA]n8 &Vbcwv@ private String sSiteURL; //Site's URL q(Zu;ecBN private String sFilePath; //Saved File's Path S#l)|c_~ private String sFileName; //Saved File's Name -~_;9[uV private int nSplitter; //Count of Splited Downloading File $: qrh66 O4T_p=Xc N:UA+ public SiteInfoBean() ^3ysY24 Q {//nSplitter的缺省值为5 Kgb<uXk //default value of nSplitter is 5 e!P]$em|1E this("","","",5); \4n9m } lFD/hz7lc UQ~gjnb[c <zp|i#~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) /OeOL3Y { ^K[[:7Aem sSiteURL= sURL; ~"22X`;h[G sFilePath = sPath; '
eH Fa sFileName = sName; M4K>/-9X+V this.nSplitter = nSpiltter; NLZUAtx( crU]P $a :JCe,1!3@ } ]lA.? 6B@{X^6y Jqqt@5Ni public String getSSiteURL() g&O!w!T
{ +A<7:`sO return sSiteURL; g&d
tOjM } 2qPQ3-' p/Ri|FD6 M][Zu[\* public void setSSiteURL(String value) GL3olKnL { J4jL%5t sSiteURL = value; s`o_ER } =:Lc-y > 6Lz:J:Q) B^BbA-I public String getSFilePath() AUPTtc`#Y { Bu#\W return sFilePath; Mf`@X[-; } !\|L(Paf ;\gHFG} y-vQ4G5F| public void setSFilePath(String value) }bYk#6KX { 5Cl;h^R|m sFilePath = value; c'Zs2s7$ } wsAijHjJI! 9P# <T7 $GX9-^og=T public String getSFileName() B2)SNhF2Y { 2IFEl-IB[ return sFileName; =R0#WMf$@ } %$zX a%A dwmZ_m. |"k+j_/+ public void setSFileName(String value) ' O d_:] { we2D!Ywr sFileName = value; Fes/8*- } HsAKz]Mq E(0 [/N~ j/w*2+&v public int getNSplitter() lU% L { ]L9$JTGF`w return nSplitter; {KM5pK?,BJ } 'L ]k\GO H05U{vR K6e_RzP,.w public void setNSplitter(int nCount) mW_ N-z { +{@hD+ nSplitter = nCount; o|c%uw } S01Bc } 'v_VyK*w 5hE mXZ% fz`\-"f] /* LABLT;c **Utility.java yn KgNi */ 9vJ'9Z2\ package NetFox; .?;"iv+ U$AV"F&!&} "78BApjWT6 public class Utility { rWxQ;bb# 75RQ\_zDu Hy#<fKz`! public Utility() o :_'R5 {
d/&~IR SMbhJ}\O y<*/\]t9L[ } V"Y-|R +4m~D`fqt[ //线程睡眠 uz[5h0c public static void sleep(int nSecond) mNnt9F3Eq { d9yfSZ try{ f>jAu;S Thread.sleep(nSecond); 7Un5Y[FZo } _J-3{a catch(Exception e) `T~~yM)q { rd!4u14 e.printStackTrace (); g;t>jgX
} Yp8GW1@ } V]0~BV ~6O<5@k //日志 e$=0.GWT public static void log(String sMsg) -KFozwr5/ { m{C System.err.println(sMsg); FvV:$V| } H?W8_XiN 2JS&zF <R@w0b> public static void log(int sMsg) j5]6CG_ {
9M!J7 W System.err.println(sMsg); $ru()/pI)z } pv){R;f } t&L+]I'P3 p:CpY'KV_ )TV{n#n /* NY9\a[[^[8 **TestMethod.java x cA5 */ QeZK&^W package NetFox; j1U,X pv9Z-WCix$ y7WO:X& public class TestMethod { AQa;D2B$ T`gR&n<D 1T@#gE["Ic public TestMethod() ^-GzWT { ///xx/weblogic60b2_win.exe L!
DK2, try{ zs@xw@
SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); MeXGE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); cas5 SiteFileFetch fileFetch = new SiteFileFetch(bean); :Lze8oY(D} fileFetch.start(); c-gpO|4> } 6o!Y^^/U catch(Exception e){e.printStackTrace ();} HbXYinG% hxQx$ zUCtH* } 9C2DW,? `;vJ\$-< />q?H)6 public static void main(String[] args) W|e$@u9 { >GV= % new TestMethod(); krI@N}OU } J;AwC>N } LWp#i8, 点击下载更多相关资料
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