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/* { ]{/t-= **SiteFileFetch.java ]Idk:et */ :'-/NtV)o? package NetFox; gjwn7_ import java.io.*; ^e _hLX\SW import java.net.*; x7&B$.>3 @s;;O\ H?vdr:WlTN public class SiteFileFetch extends Thread { IqaT?+O\?r 3*"WG O5 XK3tgaH SiteInfoBean siteInfoBean = null; //文件信息Bean XkE`U5. long[] nStartPos; //开始位置 JV^=v@Z3 long[] nEndPos; //结束位置 rNWw?_H-H( FileSplitterFetch[] fileSplitterFetch; //子线程对象 $oID(P long nFileLength; //文件长度 | `2RShu boolean bFirst = true; //是否第一次取文件 KE5kOU; boolean bStop = false; //停止标志 q]ku5A\y File tmpFile; //文件下载的临时信息 {9&;Q|D z DataOutputStream output; //输出到文件的输出流
!Y0Vid @]%IK(| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _LEK% public SiteFileFetch(SiteInfoBean bean) throws IOException mZS
>O_E { I(L,8n5 siteInfoBean = bean; J s@hLP` //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |^"1{7) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )Xz,j9GzJS if(tmpFile.exists ()) rxvx { s 8jV(P(O bFirst = false; 7hD>As7`/ read_nPos(); _ @NL;w:! } kzQ+j8.,U else GX!G> { s^G.]%iU nStartPos = new long[bean.getNSplitter()]; A@!qv#' nEndPos = new long[bean.getNSplitter()]; r[`9uVT/ } -8ywO"6 +K:Dx!9 D09Sg%w Ha0M)0Anv } #C74z$ h,u,^ r %op**@4/t\ public void run() ]b:Lo { abmYA# //获得文件长度 %A9NB! //分割文件 <s31W3<v //实例FileSplitterFetch 0y'H~( //启动FileSplitterFetch线程 :1.L}4"gg //等待子线程返回 WTQ\PANAaR try{ 8`B3;Zmm if(bFirst) M>xK+q?O { B:yGS*.tu nFileLength = getFileSize(); ;s = l52 if(nFileLength == -1) L2[($l { W fN2bsx> System.err.println("File Length is not known!"); V5nwu# } ky,(xT4 else if(nFileLength == -2) <SAzxo:I { *MFIV02[N System.err.println("File is not access!"); 7?!d^$B } ed{ -/l~j else z [}v{ { .]Y$o^mf for(int i=0;i<nStartPos.length;i++) bivuqKA { 4<w.8rR:A nStartPos = (long)(i*(nFileLength/nStartPos.length)); k<nZ+! M } %8 B}Cb&2c for(int i=0;i<nEndPos.length-1;i++) ojm @t { CAig]=2' nEndPos = nStartPos[i+1]; !7O+ogL } d=$Mim nEndPos[nEndPos.length-1] = nFileLength; j;+b0(53 } Fbr;{T
. } 6m/r+?' 1Z/(G1 }1L4"}L. //启动子线程 4$HhP,gL= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Fj 8z for(int i=0;i<nStartPos.length;i++) n:I,PS0H< { htO+z7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,a{P4Bq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;>U2|>5V nStartPos,nEndPos,i); :DK {Vg6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z}77Eh< fileSplitterFetch.start(); q<x/Hat) } #X+JHl // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IEL%!RFG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j1Y~_ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", !,_u)4 nEndPos = " + nFileLength); +[6G5cH // fileSplitterFetch[nPos.length-1].start(); H*?t^ ANAVn@ [ 1sy[@Q2b //等待子线程结束 r(>@qGN //int count = 0; o)M}!MT //是否结束while循环 >jDDQ@ boolean breakWhile = false; ozyX$tp <`8n^m* { T/[cu< while(!bStop) T=
8 0, { kUb>^-
-K write_nPos(); 3,_aAgeE Utility.sleep(500); o"s)eh breakWhile = true; W<h)HhyG k&M;,e3v6 `z}?"BW| for(int i=0;i<nStartPos.length;i++) yt+L0wzzB { (fH#I tf if(!fileSplitterFetch.bDownOver) [~+wk9P { 2"v6
>b% breakWhile = false; >>4qJ%bL break; sU<Wnz\[ } }`@vF|2L } h6Ub}(Ov if(breakWhile) :^lI`9'*R break; LRxZcxmy MVpGWTH@F ~p6 V,Q //count++; C$=%!wf //if(count>4) B&M%I:i // siteStop(); SBu"3ym } 4!{KWL`A Ot0ap$& TIqtF&@o4 System.err.println("文件下载结束!"); /$Ir5=B } I.(,hFx; catch(Exception e){e.printStackTrace ();} {S]}.7`l9( } olB.*#gA o+iiSTJEe .D"m@~j7 //获得文件长度 +yG~T public long getFileSize() tn\yI!a { /obfw^ int nFileLength = -1; a@K%06A;' try{ R`5.[?Dt URL url = new URL(siteInfoBean.getSSiteURL()); 4d4ZT?V[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;J( 8
L httpConnection.setRequestProperty("User-Agent","NetFox"); V;VHv=9`o 3Y4?CM&0v 94`7a<&ZNL int responseCode=httpConnection.getResponseCode(); LtF,kAIt7v if(responseCode>=400) #FLb*%Nr { @}u*|P* processErrorCode(responseCode); h%na>G return -2; //-2 represent access is error tPWLg), } oN~&_*FE T3.&R#1M8- caR<Kb:;* String sHeader; ,$L4dF3 IxN9&xa ='r!g for(int i=1;;i++) *\a4wZ6<3 { :wyno#8`- //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4}baSV //Utility.log(in.readLine()); |fJ};RLI" sHeader=httpConnection.getHeaderFieldKey(i); Jl8H|<g~/ if(sHeader!=null) m,_Z6=I: { #4NaL if(sHeader.equals("Content-Length")) S"QWB`W2
{ Pl06:g2I nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); se2!N:|R!G break; bjW]bRw } pZ{+c } |-67\p] else <]t%8GB2V break; QD&`^(X1p } u(.e8~s8 } B2vh-%63 catch(IOException e){e.printStackTrace ();} `:fZ)$sY catch(Exception e){e.printStackTrace ();} j?\Qh vkV0On a 7V-C Utility.log(nFileLength); *!t/"b CJx|?yK2 .k%72ez return nFileLength; ,.8KN<A2]' } vzAax k% epe)a oUlY?x1 //保存下载信息(文件指针位置) @CL{D:d private void write_nPos() Y;M|D'y+ { SYJD?&C; try{ ? pmHFlx output = new DataOutputStream(new FileOutputStream(tmpFile)); VQt0 4? output.writeInt(nStartPos.length); ^ig' bw+WS for(int i=0;i<nStartPos.length;i++) h
0Q5-EA { 9d659iC // output.writeLong(nPos); ^98~U\ar output.writeLong(fileSplitterFetch.nStartPos); Tn e4 output.writeLong(fileSplitterFetch.nEndPos); wH&!W~M
} :6
R\OeH+ output.close(); `wEb<H
} >z>!Luw catch(IOException e){e.printStackTrace ();} '3fu catch(Exception e){e.printStackTrace ();} s?}e^/"v } :J@gmY:C +.[ <% ,/I.t DH //读取保存的下载信息(文件指针位置) ]y'>=a|T private void read_nPos() =z69e%. { `p-cSxR_ try{ %p=M; DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); G`61~F% int nCount = input.readInt(); :Yh+>c}N nStartPos = new long[nCount]; xGg )Y# nEndPos = new long[nCount]; F^BS/Yag for(int i=0;i<nStartPos.length;i++) Qbn"=n2 { J/aC}}5D nStartPos = input.readLong(); CYP q#rd nEndPos = input.readLong(); .@U@xRu7| } ^"2J]&x`G input.close(); Om\vMd@! } 5L%'@`mX catch(IOException e){e.printStackTrace ();} LckK\`mh catch(Exception e){e.printStackTrace ();} Hg izW } zu{P#~21 ,!y$qVg'\f PiIpnoM private void processErrorCode(int nErrorCode) 2r?G6D| { K7:)nv
E System.err.println("Error Code : " + nErrorCode); -;m0R } )9`qG:b' l<LI7Z]A AJ`h9%B //停止文件下载 BM
.~ 5\ public void siteStop() JIOR4' 9 { $ @`V bStop = true; .j0$J\:i for(int i=0;i<nStartPos.length;i++) ChPmX+.i_ fileSplitterFetch.splitterStop(); v MH :q%M_ #rfiD%c } UECK:61Me } f+,qNvBY/ //负责部分文件的抓取 [!#L6&:a8 **FileSplitterFetch.java K`zdc`/ */ m@v\(rT. package NetFox; K=h9Ce h2]P]@nW;W >W+%8e import java.io.*; !ons]^km import java.net.*; MaQqs= 9vc2VB$ }@q`%uzi public class FileSplitterFetch extends Thread { 6}Ci>_i4# 37.S\gO] H=vUYz
String sURL; //File URL `0gyr(fES long nStartPos; //File Snippet Start Position nT$SfGFj8 long nEndPos; //File Snippet End Position WO>nIo5Y int nThreadID; //Thread's ID D8?Vn" boolean bDownOver = false; //Downing is over s$`0yGmQ boolean bStop = false; //Stop identical CxW>~O: FileAccessI fileAccessI = null; //File Access interface c]o'xd,T8\ {]@= ijjf YZ8>OwQz2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0-Ku7<a { V5>B])yQ this.sURL = sURL; >jLY" this.nStartPos = nStart; L\ "d this.nEndPos = nEnd;
|TH\`U nThreadID = id; DA,?} fileAccessI = new FileAccessI(sName,nStartPos);//定位 %pL''R9VF } 0znR0%~ _8UU'1d 'S&zCTX7j public void run() wE`]7mA { 16( QR- while(nStartPos < nEndPos && !bStop) AH7}/Rc { wc4{)qDE Fq<A V&2l5v try{ 2eY_%Y0 URL url = new URL(sURL); bwMm#f
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qqY"*uJ' httpConnection.setRequestProperty("User-Agent","NetFox"); ItrDJ' String sProperty = "bytes="+nStartPos+"-"; nMUw_7Y6 httpConnection.setRequestProperty("RANGE",sProperty); Fk7')? Utility.log(sProperty); Am|%lj+1z aeM+ d`f :tg)p+KB InputStream input = httpConnection.getInputStream(); ?GR"FmB( //logResponseHead(httpConnection); ZKTz
, ;h ;dgp+ byte[] b = new byte[1024]; 7[XRd9a5( int nRead; +\
.Lp 5 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >KhOz[Zg { :':s@gqr nStartPos += fileAccessI.write(b,0,nRead); 9qzHS~l //if(nThreadID == 1) 0 /U{p,r6` // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K is"L(C } yWo; a BW*rIn<?G ~=l;=7 T Utility.log("Thread " + nThreadID + " is over!"); 7;wd(8 bDownOver = true; `|&O*` //nPos = fileAccessI.write (b,0,nRead); @lr ztM } -x`@6 catch(Exception e){e.printStackTrace ();} :*9Wh } ;iL#7NG-R } &d^m 1 K1yzD6[eW SoSb+\*@h //打印回应的头信息 M%P:n/j public void logResponseHead(HttpURLConnection con) )1`0PJoHE { j'"J%e] for(int i=1;;i++) JU&c.p
/ { <6 Uf.u` String header=con.getHeaderFieldKey(i); i$6ypuc if(header!=null) Pw"-S?`( //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,R*
]>' Utility.log(header+" : "+con.getHeaderField(header)); p6!x=cW else hT+_(>hT break; VTY 5]|; } .Vvx,>>D } S3Xl 'e'cb>GnA 4O!ikmY:t public void splitterStop() G3AesTT| { e8?jmN`2 bStop = true; l}A93jSL } M&9+6e'-F 60?%<oJ oH T!)(Dv8@F } {q^[a-h> i2SR{e8:GF H9Q&tl9 /* O5T{eBo\ **FileAccess.java p}U ~+:v *//文件访问(定位,写) Yufc{M00 package NetFox; $suzW;{# import java.io.*; -;WGS o B>P{A7Q }y gD3:vN7 public class FileAccessI implements Serializable{ vy:Z /1q &E5g3lf //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 'c$+sp ? RandomAccessFile oSavedFile; %YqEzlzF long nPos; <bEbweQrgm m
GYoM k!'a,R: public FileAccessI() throws IOException ,/|T-Ka { m#\dSl} this("",0); bq0zxg% } UH"%N)[ Em~>9f
?Q( }`m/bgtFX
public FileAccessI(String sName,long nPos) throws IOException Ao&"r[oJSv { YNsJZnGr8# oSavedFile = new RandomAccessFile(sName,"rw"); j3E7zRm] \ this.nPos = nPos; LyFN.2qw oSavedFile.seek(nPos); V1B5w_^>h' } p9{mS7R9T >(t6.= 89(Q1R ?: public synchronized int write(byte[] b,int nStart,int nLen) &\*(Q*2N { d5:c^` int n = -1; j*r{2f4Rt try{ m^;f(IK5 oSavedFile.write(b,nStart,nLen); nUOz\y n = nLen; xdkZdx>N } J<jy2@"tXo catch(IOException e) M[,@{u/ { g{&ui.ml& e.printStackTrace (); ^.QzQ1=D } k~1?VQ+?M #!+:!_45 3L}A3de' return n; St*h>V6 } PB\x3pV!} u.xnO cOH! \(2sW^fY } sD#.Oq4&]y .U]-j\ 49HZ2`Y /* pIqeXY **SiteInfoBean.java c'yxWZEv */
r3UUlR/Do package NetFox; 86F1.ve >tW#/\x{ sLxc(d'A public class SiteInfoBean { ER.}CM6{[ k~nBiV YT(AUS5n private String sSiteURL; //Site's URL : eVq#3} private String sFilePath; //Saved File's Path A6(/;+n private String sFileName; //Saved File's Name ,Ko!$29[ private int nSplitter; //Count of Splited Downloading File H"WprHe hkQ"OsU $yNS
pNmT0 public SiteInfoBean() tK\~A,= {//nSplitter的缺省值为5 E hMNap}5" //default value of nSplitter is 5 z-)O9PV this("","","",5); Lw>N rY(Y } BnasI;yWb #S"nF@ *gWwALGo5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $-sHWYZ { @E|}Y sSiteURL= sURL; oXF.1f/h sFilePath = sPath; #QMz<P/Gl6 sFileName = sName; )\$|X}uny& this.nSplitter = nSpiltter; s?nR 4 -nV9:opD {_v#~595 } *0=j?~& W7nw6;7= ZPYS$Ydy public String getSSiteURL() tY4;F\e2|A { ~Z'?LV<t return sSiteURL; fI|Nc } d7bS
wL i=2N;sAl R4:b{ )=O public void setSSiteURL(String value) f) L { >~0Z& d sSiteURL = value; qUb& } t"oeQ*d%
92oFlEJ 8KzkB;=n public String getSFilePath() lrIe"H@ { L.JT[zOfb return sFilePath; j1T#yt
J } 1bwOmhkS ^^ixa1H< CRy|kkT public void setSFilePath(String value) $
$mV d+ { QoT;WM Z sFilePath = value; ;9QEK]@ } p9-K_dw3X@ AFwdJte9e ;
BHtCuY public String getSFileName() O0H.C0} { z+X}HL return sFileName; b@hqz!)l` } '!B&:X) J5,9_uo] 7s^'d,P public void setSFileName(String value) X 0+vXz{~g { {]4LULq sFileName = value; sK?twg;D*| } HJ.-Dg5U KHvYUTY 5]:U9ts# public int getNSplitter() j^RmrOg, { NC6&x=!3 return nSplitter; H3-hcx54T } (KZ{^X?a Tpa5N'O @-`*m+$U6 public void setNSplitter(int nCount) 3F^Q51:t { SNk=b6`9 nSplitter = nCount; ysnx3(+| } ('+d.F[109 } F#5~M<`.o yyTnL 2Y9 /PXzwP_(A /* G7/ +ogV **Utility.java 1<aP92/N& */ `r 4fm`< package NetFox; XC#oB~K' W=+ Y|R! b4Ekqas public class Utility { 6[AL|d
DK [AJJSd/: nQ3A~ () public Utility() :e+jU5;]3 { <<O$ G7c *wjrR1#81x -M#Wt`6A } k$:|-_(w C\hM =% //线程睡眠 i SQu#p@ public static void sleep(int nSecond) B&"Q\'c { -MBxl`JU try{ _Y m2/3! Thread.sleep(nSecond); XW92gI<O } w5 Li&m catch(Exception e) @_{=V0 { ?:eV%`7 e.printStackTrace (); ;5( UzQU } DzRFMYBR } pT6$DB# + Vdpy( //日志 ,|/f`Pl public static void log(String sMsg) cPQiUU~W@ { YtLt*Ig% System.err.println(sMsg); 86a\+Kz%%L } W[r>.7>?h E' uZA */S_Icf public static void log(int sMsg) Ab;.5O$y { t sRdvFFq System.err.println(sMsg); A^S gI-y| } )D%~`,#pQ } @IZnFHN ~pky@O#b )fAUum /* l9"s>P U **TestMethod.java ql~J8G9 */ %J-GKpo/S package NetFox; >y+B `\ol,B_l i,VMd public class TestMethod { O^rD HFj, b|(:[nB |JsZJ9W+J public TestMethod() Y}KNKO; { ///xx/weblogic60b2_win.exe `kSZX:=}; try{ hXya*#n# SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); G^@5H/) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9W);rL|5 SiteFileFetch fileFetch = new SiteFileFetch(bean); 7a}k fileFetch.start(); +
>!;i6| } b\,+f n catch(Exception e){e.printStackTrace ();} y8xE
6i wb ;xRP"w (**oRwr% } ]eV8b*d6 K:WDl;8(d -D:b*D public static void main(String[] args) 1{.9uw"2S { X5w$4Kj&4l new TestMethod(); q1ma%eiN } PZzMHK?hP } iU:cW=W|M\ 点击下载更多相关资料
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