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/* >n\Q[W **SiteFileFetch.java !]T|=yw */ '(>N
gd[ package NetFox; ?`}U|]c import java.io.*; t\0JNi$2 import java.net.*; 9:~^KQ{? jzp%.4/j 39eoL;O_ public class SiteFileFetch extends Thread { m&8_i`%< rvO+=Tk $MGd>3%y SiteInfoBean siteInfoBean = null; //文件信息Bean +y#979A, long[] nStartPos; //开始位置 Z28@yD+ long[] nEndPos; //结束位置 [0@i,7{ZqE FileSplitterFetch[] fileSplitterFetch; //子线程对象 xGPv3TLH^ long nFileLength; //文件长度 Wd<}|?R boolean bFirst = true; //是否第一次取文件 9V!K._Cb boolean bStop = false; //停止标志 @L7rE)AU. File tmpFile; //文件下载的临时信息 *E6 p= DataOutputStream output; //输出到文件的输出流 Bqj*{m f& *E;l0 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) r?7^@ public SiteFileFetch(SiteInfoBean bean) throws IOException $a1.c;NE' { 4B(qVf&M siteInfoBean = bean; BpE[9N //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ?2c:|FD tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Iqv
5lo
. if(tmpFile.exists ()) A;PV,2|X { |.yRo_ bFirst = false; 2US8<sq+ read_nPos(); K~G^jAk+ } 0\A[a4crj else s5@^g8(+C { r]{:{Z nStartPos = new long[bean.getNSplitter()]; ;kA2"c]m nEndPos = new long[bean.getNSplitter()]; \t3i9#Q } wEyh;ID3# [c~zO+x }=5(*Vg $>Do&TU
} p!
1zhD iLei-\w6y vzPrG%Uu7g public void run() KxI(#}5o& { >ZWm0nTr //获得文件长度 5O*$#C;c //分割文件 ZN/") //实例FileSplitterFetch g}7%3D //启动FileSplitterFetch线程 QG
ia( //等待子线程返回 )^AO?MW try{ \WEC1+@ if(bFirst) Z_/03K$q { &nn": nFileLength = getFileSize(); QBg'VV if(nFileLength == -1) :a2?K5 { u)ItML System.err.println("File Length is not known!"); 57rP@,vj } *{Vyt5 else if(nFileLength == -2) C_o.d~xm { HH+XEM P/g System.err.println("File is not access!"); r\?*?sL } EhoR. else UlR7_ { 2t%)d9r32 for(int i=0;i<nStartPos.length;i++) Gl(,%~F9i { 420K fVA nStartPos = (long)(i*(nFileLength/nStartPos.length)); +=v|kd } A2 rRYzN; for(int i=0;i<nEndPos.length-1;i++) v?J2cL { l!2.)F` x nEndPos = nStartPos[i+1]; TDFv\y}yc } 3/D fsv nEndPos[nEndPos.length-1] = nFileLength; 7}MWmS^8j } oUH\SW8? } &x}JC/u]fd
E2l. l1msXBC //启动子线程 '=5N?) fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ~Km8-b(& for(int i=0;i<nStartPos.length;i++) $vd._j& { a&JAF?k fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [dUEe@P siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), JT<J[Qz5 nStartPos,nEndPos,i); :Li)]qN.I Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]d0Dd")n fileSplitterFetch.start(); N|; cG[W } .,4&/cd // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !&kOqc5:t< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >ObpOFb% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -Q/Dbz#- nEndPos = " + nFileLength); ;1WclQ!( // fileSplitterFetch[nPos.length-1].start(); UA^E^$f: 7G(X:! +!rK4[W' //等待子线程结束 b/)UN*~ //int count = 0; Pj$a$C`Z //是否结束while循环 ^gy(~u boolean breakWhile = false; 8EQ;+V s<{c?4T "D+QT+sD while(!bStop) 5|Uub, { W c nYD) write_nPos(); Wr;)3K
Utility.sleep(500); H]-nm+ breakWhile = true; Nt)9-\T a2z o_h2R %(i(ZW " for(int i=0;i<nStartPos.length;i++) m@ ~HHwj { /*[a>B4-q if(!fileSplitterFetch.bDownOver) CBc}N(9 { 8w$cj' breakWhile = false; z&eJ?wb break; PO#FtG } FU<rE&X2: } ezL*YM8?@ if(breakWhile) 5<61NnZ break; ]l4\/EW6 ,YH.n>`s+ R!`#pklB //count++; 9P]TIV. //if(count>4) ls=<c< // siteStop(); 1i{B47| } &]5<^?3 Zhw _L d(&vIjy System.err.println("文件下载结束!"); 7+0hIKrFC } Z]aSo07 catch(Exception e){e.printStackTrace ();} YWTo]DJV } sM4N`$Is23 8<P.>u 3B,nHU //获得文件长度 L\"$R":3{d public long getFileSize() Z|)~2[Roa { b{sFN! int nFileLength = -1; q.*qZ\;K try{ \]^|IViIQ URL url = new URL(siteInfoBean.getSSiteURL()); ,y^By_1wS HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]M_)f httpConnection.setRequestProperty("User-Agent","NetFox"); Vi]D](^! Q)v8hNyUmA sQR;!-j int responseCode=httpConnection.getResponseCode(); ]O 2_&cs if(responseCode>=400) b{(:'. { Q.nEY6B_ processErrorCode(responseCode); CnO$xE|{ return -2; //-2 represent access is error xx%WIY:} } r+>9O S_^ "$j 3p7*UVR" String sHeader; thOCzGJ$ H`fkds X,~8) W for(int i=1;;i++) \4V'NTjB { GU!|J71z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); aPWFb.JO4 //Utility.log(in.readLine()); [QeKT8 sHeader=httpConnection.getHeaderFieldKey(i); "5{\0CfS if(sHeader!=null) }L@YLnc% { E_$ST3 if(sHeader.equals("Content-Length")) X!&=S!} { ;DGp7f#9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); <F&S break; p<Zf,F} } rq$% } $UKDXQF" else e&E*$G@.7 break; qWo|LpxWt } b\}`L" } "|f ; catch(IOException e){e.printStackTrace ();} e7<~[>g) catch(Exception e){e.printStackTrace ();} A=BpB}b T%Z `:mf ~]N%
{;F} Utility.log(nFileLength); 2PRGwK/ ctj.rC)6n Oyz=|[^,W return nFileLength; dNIY`u } MECR0S9 7 0KZXgBy_ m"u 9AOH k //保存下载信息(文件指针位置) _w)0r}{ private void write_nPos() U;ev3 { (RGl, x: try{ lnTl"9F output = new DataOutputStream(new FileOutputStream(tmpFile)); Yh"R# output.writeInt(nStartPos.length); S7-?&[oeJ for(int i=0;i<nStartPos.length;i++) s*rtm { Rb#?c+&# // output.writeLong(nPos); 5FzG_ w output.writeLong(fileSplitterFetch.nStartPos); 10*U2FY)] output.writeLong(fileSplitterFetch.nEndPos); G$ip Wi } )5&Wt@7Kj` output.close(); >4bOM@[] } |`#[jHd catch(IOException e){e.printStackTrace ();} yl|+D] catch(Exception e){e.printStackTrace ();} =$fxK } O>H4hp K&Zdk (l) mh|M O( //读取保存的下载信息(文件指针位置) jt?R
a1Z private void read_nPos() z^~fVl { =n%?oLg^ try{ ^]OD+ v DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ]kc]YO7i%R int nCount = input.readInt(); P%.9 g nStartPos = new long[nCount]; V5R``Tp nEndPos = new long[nCount]; \\)3:1X for(int i=0;i<nStartPos.length;i++) 6VRVk7" { 2N `Vx3 nStartPos = input.readLong(); aNfgSo05@n nEndPos = input.readLong(); (n# } M1VRc[
RRo input.close(); S tn[M| } =T;%R^@ catch(IOException e){e.printStackTrace ();} )p( XY34] catch(Exception e){e.printStackTrace ();} ))u$j4V } /ZX8gR5x {_PV~8u VAV@Qn private void processErrorCode(int nErrorCode) cND2(<jx: { Wu%;{y~#} System.err.println("Error Code : " + nErrorCode); G| ^tqI }
}?"f#bI yU&A[DZQ 90M:0SH //停止文件下载 ]oZ$,2#;~ public void siteStop() h|_G2p^J+" { M`AbH19 bStop = true; 1 BVivEG for(int i=0;i<nStartPos.length;i++) ;z!~-ByzL fileSplitterFetch.splitterStop(); 2x'JR yef .b5B7x} d7P|
x } n8J';F
=P } o
KX!{ //负责部分文件的抓取 t:$p8qR **FileSplitterFetch.java t4h5R */ H<dm;cU package NetFox; QZ%_hvY[%> 5h1FvJg o{m$b2BW import java.io.*; G`gYwgU; import java.net.*; B
+_D*a u]CW5snz SC"=M^E public class FileSplitterFetch extends Thread { qDOx5.d oQFpIX;\m no^I![_M String sURL; //File URL 9
bGN5.5 long nStartPos; //File Snippet Start Position Va?wG3 w long nEndPos; //File Snippet End Position RVX-3FvP int nThreadID; //Thread's ID ;w[|IRa boolean bDownOver = false; //Downing is over :@ 19,.L boolean bStop = false; //Stop identical B3e{'14 FileAccessI fileAccessI = null; //File Access interface %q(n'^#Z.y LR'F/.Dx AgO:"'c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /tx_I(6F?| { &&TQ0w&T this.sURL = sURL; KYd2=P6 this.nStartPos = nStart; @I#@%"AW this.nEndPos = nEnd; ppfBfMX nThreadID = id; MX6;ww fileAccessI = new FileAccessI(sName,nStartPos);//定位 `fc2vaSH = } O>)8< yi$ &PgbFy
*}A J7] public void run() |_
E)2b:h { WZ;f3
" while(nStartPos < nEndPos && !bStop) .u)Po;e` { pgfI1`h Q_qc_IcM y mp%i(Y"vp try{ o1-Zh!*a* URL url = new URL(sURL); 9Jaek_A` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); X{<j%PdC httpConnection.setRequestProperty("User-Agent","NetFox"); OV Iu&6# String sProperty = "bytes="+nStartPos+"-"; a*KB'u6& httpConnection.setRequestProperty("RANGE",sProperty); cPkN)+K Utility.log(sProperty); dy#dug6j Z#nj[r!l} [uW{Ap ~2 InputStream input = httpConnection.getInputStream(); Ga"$_DyM //logResponseHead(httpConnection); '72ZLdi}- mS0*%[S { kce+aiv|u byte[] b = new byte[1024]; ~g~z"!K int nRead; VctAQ|h^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) d* 7 Tjs{\ { C/tn0 nStartPos += fileAccessI.write(b,0,nRead); -D`*$rp, //if(nThreadID == 1) TBvv(_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hA/K>Z } sGc4^Z%l? n\ZDI+X 0ppZ~}& Utility.log("Thread " + nThreadID + " is over!"); #p6#,PZ bDownOver = true; 5<Xq7|Jt //nPos = fileAccessI.write (b,0,nRead); &iId<.SiJ } Oy&Myjny< catch(Exception e){e.printStackTrace ();} IH'DCY: } >jq~5HN } "#qyX[\ Ks{^R`Oau M~zdcVTbH //打印回应的头信息 Zii<jZ.)< public void logResponseHead(HttpURLConnection con) P<km?\Xp( { -_4U+Cfmtl for(int i=1;;i++) MX xRM~ { xmT(yv, String header=con.getHeaderFieldKey(i); Ud\Jc:DG if(header!=null) Ti=~y cwi //responseHeaders.put(header,httpConnection.getHeaderField(header)); \:'=ccf Utility.log(header+" : "+con.getHeaderField(header)); AJI,>I,}} else Wu,'S;>C break; bH~ue5q } qR--lvO } 7fgA)dU:K BOoLs(p $7T3wv9 public void splitterStop() BI3Q~ADV { MrXhVZ"d* bStop = true; )?:V5UO\ } 7eqax33f 1ZOHyO |l
03,dOF } W52AX.Nm mh2t ' O a.y_o50#T /* S=n,unn#t **FileAccess.java 3BDAvdJ4. *//文件访问(定位,写) 4Sf v package NetFox; e@Q<hb0<eU import java.io.*; YrS%Yvhj0 0-oR
{
{ I;S[Ft8d public class FileAccessI implements Serializable{ $RuJm\f rLw,? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ont4-AP
RandomAccessFile oSavedFile; 9_n!.zA< long nPos; i<YatW~Pu |-bSoq7t cP'' public FileAccessI() throws IOException L6fc_Mo.EE { b?hdWQSW7 this("",0); 7q<I7Wt } QU2\gAM Rf+ogLa= %`t;5kmR public FileAccessI(String sName,long nPos) throws IOException @V
Bv}Jo { ]!E|5=q oSavedFile = new RandomAccessFile(sName,"rw"); ^z-e" this.nPos = nPos; hw:zak#j, oSavedFile.seek(nPos); 559znM= } -n?}L#4%8 hu%UEB RX P 0
4 public synchronized int write(byte[] b,int nStart,int nLen) (Eq0 |"cj { \Azl6`Em int n = -1; x00"d$! try{ AkrUb$ } oSavedFile.write(b,nStart,nLen); yQ?N*'}$ n = nLen; <.s=)}'`P } /%\E2+6 catch(IOException e) X3NHQMI { {w$1_GU e.printStackTrace (); 7SE\(K=<% } I83ZN] #/Y t4n AF g* return n; qsk8 # } -9Wx;u4]o S 0eD
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} (Hb
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u X2hV)8Sk /* x]&V7Y **SiteInfoBean.java $`W.9 */ U$@p"F@P package NetFox; WHk/Rg%< axW3#3#` -yHVydu= public class SiteInfoBean { RUC
V!L *lRP ZN /Y_F"GQ private String sSiteURL; //Site's URL L']EYK5 private String sFilePath; //Saved File's Path dPwe.: private String sFileName; //Saved File's Name 3
[: x#r private int nSplitter; //Count of Splited Downloading File $=uyZTYF)} }A3(g$8KR |FGt' public SiteInfoBean() b&f;p}C24 {//nSplitter的缺省值为5 `d2}>
//default value of nSplitter is 5 )eop:!m this("","","",5); }\k"azQ` } -Qgu6Ty ] S<y,d- O?/\hZ"&c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) i% 19|an { NTS
tk{s, sSiteURL= sURL; +h_'hz&HlS sFilePath = sPath; Me;@/;c( sFileName = sName; tz\7,yGT this.nSplitter = nSpiltter; s7e)Mt {|=
8wB Sh( } ;
>Tko< gO_{(\w* 6 "U&i9 public String getSSiteURL() [h SE^
m { Q]9H9?}N? return sSiteURL; fz#e4+oH } 5<\&7P3y Y0fX\6=h xZZW*d_b public void setSSiteURL(String value) Is&z~Xy/ { ]S4 TX sSiteURL = value; ~n9BN'@x } L!s/0kBg ,R]hNjs-{ S G|``}OA public String getSFilePath() Tu2BQ4\[ { 2mN>7Tj: return sFilePath; WW82=2rJ9 } 7t= e"|^ ^Lr)STh Y+75}]B public void setSFilePath(String value) DP **pf%j { YzJ\< tkp sFilePath = value; _Bm/v^( } N+%E=D> :=WiT_M RO"c+|Py public String getSFileName() E:/G!1 { :bFCnV`Q return sFileName; }UNRe]ft$ } roT$dL
P)w Fw? ;Y% ]4wyuP,up public void setSFileName(String value) 5m{!Rrb { 8##-fv] sFileName = value; I)Y ^_&= } ,4wVQ(,?cd CKwrE]h &.D3f" public int getNSplitter() MT9c:7}[& { Qfx(+=| return nSplitter; Hf!o6 o } Hv2t_QjKT T^.;yU_B? Lsa&A+fru public void setNSplitter(int nCount) +InAK>NZ' { 7WK^eW"y8 nSplitter = nCount;
T[*1*303 } Z ?` } 9SF2 l]D?S]{a Lh.?G#E M /* ?;Dh^mc **Utility.java Q`k=VSUk */ 17g\XC@ Cl package NetFox; S^0Po%d aC:Sy^Tf `(s&H8x# public class Utility { P @N7g`u3} 1M+o7HO.mG epM;u public Utility() ;BzbWvBo { oe,I vnt N"Y) zvv<w@rX } jf25Ky~ ]G.ttfC //线程睡眠 :ad public static void sleep(int nSecond) 1vKc>+9 { (n:d
{bKV try{ _Kdqa%L
! Thread.sleep(nSecond); :L gFd } 6d/;GyG catch(Exception e) AuIb>@a { iIWz\FM e.printStackTrace (); T(t@[U2^ } kSx^Uu* } L1=+x^WQ %xZYIYKf //日志 w@w(AFV9/ public static void log(String sMsg) i}teY{pyc {
s;V~dxAiv System.err.println(sMsg); `kb]tf } v5STe` 9}p>=' .?{rd3[ec public static void log(int sMsg) x Vk|6vA7 { ^uB9EP*P System.err.println(sMsg); ?m.WqNBH7 } S9/oBxGN } 8xs}neDg* cojtQD6 (T;4'c /* ?/ xk **TestMethod.java +>3XJlZV */ |iN!V3#S package NetFox; hTgWqp PwP;+R};| Y_m/? [: public class TestMethod { A&EVzmj-+X Cm@e^l! z}I =: public TestMethod() $:IOoS|e { ///xx/weblogic60b2_win.exe ~ [L4,q try{ l&3f<e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); NIZN}DnP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); h^_Sd"l3 SiteFileFetch fileFetch = new SiteFileFetch(bean); ~2
L{m[s| fileFetch.start(); E"d\N-I } _<tWy+. catch(Exception e){e.printStackTrace ();} :|cC7,S "|P8L|
@* irj{Or^k }
g/Q"%GN, 5(BB`) _,*ld#'s public static void main(String[] args) W/03L, 1 { o,o,(sII new TestMethod(); 9G njJ } hP1}Do } 1aEM&=h_W 点击下载更多相关资料
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