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/* >$L7J=Em **SiteFileFetch.java a{hc{ */ EGQgrwY5 package NetFox; Q+9:]Bt import java.io.*; ".(vR7u' import java.net.*; |.0~' _OuNX.yrG K3[+L`pz public class SiteFileFetch extends Thread { ~h; U{M3QOF @=dv[P"jn SiteInfoBean siteInfoBean = null; //文件信息Bean aXJ/"k #Tl long[] nStartPos; //开始位置 6Jb0MX"AVr long[] nEndPos; //结束位置 NGl
8*Af FileSplitterFetch[] fileSplitterFetch; //子线程对象 3,{eH6,O7M long nFileLength; //文件长度 7KhS{w6 boolean bFirst = true; //是否第一次取文件 rMbq_5} boolean bStop = false; //停止标志 DlE, aYB File tmpFile; //文件下载的临时信息 j7kX"nz DataOutputStream output; //输出到文件的输出流 kF~(B]W( V@k+RniEO //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) .G!xcQ`? public SiteFileFetch(SiteInfoBean bean) throws IOException =zK4jiM1 { 4hwb]
Yz siteInfoBean = bean; rVNx2 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); b2UDP W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); k!0O[U if(tmpFile.exists ()) g}D)MlXRq { 7N[".V]c bFirst = false; NOXP}M read_nPos(); ?8"*B^*Sh } X%IqZ{{ else -GPJ,S V> { CMW4Zqau* nStartPos = new long[bean.getNSplitter()]; U\?D;ABQ% nEndPos = new long[bean.getNSplitter()]; 49&i];:%7% } S1U0sP@o 7UMZs7L$ 0HoHu*+FX |di(hY| } .c+U=bV- <7\j\` i3N{Dt public void run() (is' ,4^b { $ItmYj.m //获得文件长度 s"`~Xnf //分割文件 m.m6. //实例FileSplitterFetch nXLz<wE //启动FileSplitterFetch线程 j}ob7O&U'w //等待子线程返回 Mu[lk=jC try{ #:gl+ if(bFirst) 2MRd { :
"|/ nFileLength = getFileSize(); fc*>ky.v if(nFileLength == -1) h2Nt@ { jL\j$'KC System.err.println("File Length is not known!"); OA&'T*)-A6 } E .Xp\Dm71 else if(nFileLength == -2) H@1'El\9 { $kTm"I System.err.println("File is not access!"); &<98nT } H}F
UgA; else \+R %KA/F { xX%ppD7 for(int i=0;i<nStartPos.length;i++) vF$(
Y/ { l[$GOLeS nStartPos = (long)(i*(nFileLength/nStartPos.length)); cj>UxU][eS } ?uSoJM`wa! for(int i=0;i<nEndPos.length-1;i++) *HR
pbe2 { ?K[Y"*y2 nEndPos = nStartPos[i+1]; j9>[^t3U } Unb2D4&' nEndPos[nEndPos.length-1] = nFileLength; KSchgon0V } qKfUm:7Q_ } eavn.I8J :6nD "5( qhGz2<}_j //启动子线程 bQautRW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HXKM<E{j for(int i=0;i<nStartPos.length;i++) q8d](MaX { Ow/,pC >V fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g D6S%O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), sWr;%<K nStartPos,nEndPos,i); p6<JpW5@_ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (NLw#)? fileSplitterFetch.start(); prj( } y<FC7 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2@ZVEN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); U_*,XLU // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", n>, :*5"G nEndPos = " + nFileLength); (a_bU5) // fileSplitterFetch[nPos.length-1].start(); D0jV}oz u?`{s88_mF /(JG\Ut //等待子线程结束 l{dsm1#W~ //int count = 0; 9?,i+\)qK@ //是否结束while循环 fY&TI}Y boolean breakWhile = false; T&'Jc -H6[{WVW! m~
ah!QM while(!bStop) MTtx|L\4 { ej-A=avd write_nPos(); %JE>Z] Utility.sleep(500); 4}m9, breakWhile = true; N4+Cg t( IrL%0&*hS ~6i'V?> for(int i=0;i<nStartPos.length;i++) g9" wX?* { 61H_o7XXk if(!fileSplitterFetch.bDownOver) l%EvXdZuOy { AaYH(2m- breakWhile = false; X=whZ\EZ break; AE77i,Xa } _l7_!Il_ } e|{R2z"^ if(breakWhile) [=(8yUV'G break; l9f_NJHo OWewV@VXR lk
1\|Q
I //count++; &'>m;W //if(count>4) Kz42AC // siteStop(); z='%NZY } 1GK.:s6.f V gMgeja ]_h3 System.err.println("文件下载结束!"); I%J>~=]n_ } .3C::~: catch(Exception e){e.printStackTrace ();} cZBXH*-M! } ,kJ7c;:i >O\+ 9T@ CK n2ZL //获得文件长度 /3aW 0/^o public long getFileSize() @KL&vm(F$ { T9V=#+8#" int nFileLength = -1; Bn]=T try{ Hnt*,C.0 URL url = new URL(siteInfoBean.getSSiteURL()); Dq<la+VlO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Csuasi3]1d httpConnection.setRequestProperty("User-Agent","NetFox"); n!z!fh J1}\H$*X -E?:W`! int responseCode=httpConnection.getResponseCode(); o^~ZXF} if(responseCode>=400) 5\pS8<RJ; { 7_2D4CI processErrorCode(responseCode); sg7h&<Xx return -2; //-2 represent access is error =T9h7c R } vIJ5iLF JhFn"(O [<53_2]~ String sHeader; Eto"B" YAc:QVT87 Sh!c]r>\Q for(int i=1;;i++) L4Jm8sy{ { l48$8Mgrr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *gwaW!= //Utility.log(in.readLine()); 44*#qLN sHeader=httpConnection.getHeaderFieldKey(i); 1k6asz^T if(sHeader!=null) 5Qq/nUR { {C5:as if(sHeader.equals("Content-Length")) b5|*p(7[ { #1haq[Uv7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,A{Bx`o? break; &"%Ws{Qn] } 7=Muq]j2 } h,Hr0^? else ,}IcQu'O break; f`Fj-<v } MOQ6&C`7q } k3$'K}=d catch(IOException e){e.printStackTrace ();} `'s_5Ek catch(Exception e){e.printStackTrace ();} sR9$=91`
!tTv$L>
~frsgHW Utility.log(nFileLength); &'/"=lK }9\_s* mvjx
&+q return nFileLength; 5&s6(?,Eu } DD=X{{;D\" (
3B1X Em&3g //保存下载信息(文件指针位置) 5Hu[* private void write_nPos() anW['!T9{s { w3(G!: try{ /FN:yCf output = new DataOutputStream(new FileOutputStream(tmpFile)); vE)N6Ss output.writeInt(nStartPos.length); 3q/Us0jr for(int i=0;i<nStartPos.length;i++) I]eeV+U8W { x >a h, // output.writeLong(nPos); {nmu(EP output.writeLong(fileSplitterFetch.nStartPos); G{: B'08 output.writeLong(fileSplitterFetch.nEndPos); $Xwk8< } _\d|`3RM output.close(); z~h?"' } =Oy& f:s catch(IOException e){e.printStackTrace ();} ?Vg~7Eu0 catch(Exception e){e.printStackTrace ();} _5 SvZ;4 } 7310'wc E9\"@wu[d GbO j%
a //读取保存的下载信息(文件指针位置) ?-c|c_|$ private void read_nPos() vy~6]hH { %q|*}l try{ "J,|),Yd DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8)8~c@ int nCount = input.readInt(); y0p=E^QM nStartPos = new long[nCount]; fC'u-m?!Q' nEndPos = new long[nCount]; *N$XQ{o for(int i=0;i<nStartPos.length;i++) u;9iuc`* { c{Z
"'t7 nStartPos = input.readLong(); Mi.2
> nEndPos = input.readLong(); I?D=Q$s } q*lk9{> input.close(); P\Qvj7_ } YMu#<ZG catch(IOException e){e.printStackTrace ();} c<_1o!68 catch(Exception e){e.printStackTrace ();} h
i!K-_Uy } *66EkCj a.<XJ\ /b
#w.>e private void processErrorCode(int nErrorCode) kI`HD { I7Kgi3 System.err.println("Error Code : " + nErrorCode); -I{op
wd } JYNnzgd Y&b Yaq 6%p6BK6 //停止文件下载 CL2zZk{u_ public void siteStop() ?x",VA { BywEoS bStop = true; pHR`%2!"t for(int i=0;i<nStartPos.length;i++) \
R}I4' fileSplitterFetch.splitterStop(); $DH/ sRT5i9TQ WY|~E%k }
*1v3x:pQ' } s@~3L //负责部分文件的抓取 `Zuo`GP*1 **FileSplitterFetch.java Bs0~P 4^ */ (zsmJe package NetFox; aW:*!d# >AV9 K 3q/"4D import java.io.*; g.Ur~5r import java.net.*; ^kK")+K pWzYC@_W
a`yCPnB( public class FileSplitterFetch extends Thread { XC6 |<pru I;jH'._k# br88b`L String sURL; //File URL P}AwE,&Q long nStartPos; //File Snippet Start Position JGq9RB]D$ long nEndPos; //File Snippet End Position @8J*vY =e int nThreadID; //Thread's ID
LT{g^g boolean bDownOver = false; //Downing is over X_-/j. boolean bStop = false; //Stop identical "d/54PKWx FileAccessI fileAccessI = null; //File Access interface T#rUbi>"" &O+S[~ |b@`ykD public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /b{@'] { #pRbRT9 this.sURL = sURL; ~Fvz&dO this.nStartPos = nStart; H)TKk%`7 this.nEndPos = nEnd; "=]'"'B: nThreadID = id; 0KExB{ K fileAccessI = new FileAccessI(sName,nStartPos);//定位 )]Zdaw)X } 7mnO60Z8N S9:ij1 y46sL~HRv public void run() "?aE3$/ { W{JR%Sq$ while(nStartPos < nEndPos && !bStop) clqFV
{ q ) 5s'( S8;c0}- qtVgjT2#H try{ 2|!jst URL url = new URL(sURL); dn~k_J=p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W"/,<xHuh httpConnection.setRequestProperty("User-Agent","NetFox"); #lFsgb String sProperty = "bytes="+nStartPos+"-";
1^hG}#6_ httpConnection.setRequestProperty("RANGE",sProperty); FFwu$S6e Utility.log(sProperty); S5m.oHJI* %[*_-% e#6H[t
InputStream input = httpConnection.getInputStream(); wD //logResponseHead(httpConnection); [Ketg C.=%8|Zy }rVLWt byte[] b = new byte[1024]; cPL6(&7 int nRead; l}S96B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) s Fk{Tv@Yz { 'u PI~l`g nStartPos += fileAccessI.write(b,0,nRead); uG.` //if(nThreadID == 1) @B+8' b$9 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y\6C9%. } G?s;L NR qoQ,3&< wMm+E "}W Utility.log("Thread " + nThreadID + " is over!"); &_QD1 TT bDownOver = true; sAX4giaLD //nPos = fileAccessI.write (b,0,nRead); ]*DIn1C^ } &z\?A2Mw% catch(Exception e){e.printStackTrace ();} 2sBYy 8.r } B_c-@kl } AA|G&&1y
9Z2aFW9 =;8q` //打印回应的头信息 H-&
ktQWK3 public void logResponseHead(HttpURLConnection con) xjDaA U, { q/7T-"q/G for(int i=1;;i++) L{f0r!d| { Ov:U3P?% String header=con.getHeaderFieldKey(i); 7'{%djL if(header!=null) 3gCP?%R //responseHeaders.put(header,httpConnection.getHeaderField(header)); Kv5 !cll5 Utility.log(header+" : "+con.getHeaderField(header)); 6XhS
g0s else X=Y>9 break; ]nS9taEA } O St~P^1 } #R=6$ jfR!M07| (=53WbOh/t public void splitterStop() cpq0'x\ { ]x_14$rk bStop = true; oe_,q&e } NUY sQO) I7#+B1t A{hST~s } >y@3`u] (a|Wq{`[ \$8p8MP<&D /* "X1{* **FileAccess.java /h!iLun7I *//文件访问(定位,写) v Dph}Z package NetFox; bsWDjV~ import java.io.*; n
QOLR?% M)nf(jw#G iaaD1<m public class FileAccessI implements Serializable{ FefS]G {M0pq3SL*t //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 uc;,JX!bN RandomAccessFile oSavedFile; }PzYt~Z`@ long nPos; =H^^A G\} mhnK{M @56 "OKsl2e public FileAccessI() throws IOException yc$8X sns { ;fY)7
' this("",0); '$CJZ`nt } {uO2m*JrI ByXcs' JA?P jo public FileAccessI(String sName,long nPos) throws IOException WB|SXto%4D { 9fb"R"(M oSavedFile = new RandomAccessFile(sName,"rw"); ~F]If \b this.nPos = nPos; 0>?78QL9< oSavedFile.seek(nPos); ld23^r } u/74E0$S +(2mHS0_a "IsDL^)A9 public synchronized int write(byte[] b,int nStart,int nLen) NB/ wJ3 F { T$xY]hqr int n = -1; ki_Py5 try{ }~ o>H a; oSavedFile.write(b,nStart,nLen); h3L{zOff n = nLen; kF *^" Cn } Kd,7x'h`E catch(IOException e) BBm;QOBU { r \]iw v e.printStackTrace (); wkZ}o,{*: } 6t6#<ts !Zf)N_k ,ffH:3F return n; KbF,jm5 } d\aU rsPn !xh.S#B V,Br|r$l( } 4qEeN-6h GCPSe A~cx [VwoZX: /* (%EhkTb **SiteInfoBean.java IE9A _u* */ xk5Z&z package NetFox; /7<l`RSr KrT+Svm H@,(
public class SiteInfoBean { (f|3(u'e? pVm'XP GKKf#r74 private String sSiteURL; //Site's URL ^cF_z}Zi+ private String sFilePath; //Saved File's Path =h2zIcj private String sFileName; //Saved File's Name "S@%d(lg private int nSplitter; //Count of Splited Downloading File ~nG?> U_c.Z{lC4 ]`Y;4XR public SiteInfoBean() :X;'37o#q {//nSplitter的缺省值为5 hpJi,4r.d //default value of nSplitter is 5 YTpO4bX this("","","",5); <$'OSN`! } GoNX\^A ,0=:06l "+V.Yue`R public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) @'EU\Y\l { n +z5;'my sSiteURL= sURL; vrD]o1F sFilePath = sPath; $fA%_T_P'P sFileName = sName; bO%bMZWB!y this.nSplitter = nSpiltter; Rc H",*U f?1?$Sp/W H)5v X+9D } rOu7r 4 bytAdS$3 |};P"& public String getSSiteURL() ;'r} D!8w/ { cmv&!Egd return sSiteURL; 8D U|j-I8 } 'J&$L c n`krK"Ii d&QB?yLd public void setSSiteURL(String value) D"m]`H { @m[r0i0J" sSiteURL = value; 195m0'zda } N%\!eHxy 2\M^_x$N aoh"<I%]>4 public String getSFilePath() uMToVk`Uv { J
;=~QYn[ return sFilePath; W7lR54%| } ~I%m[fQ S ['~B& ee.#Vhz public void setSFilePath(String value) !>{`o/dZ { ~4\J}Kn sFilePath = value; 2WRa@;Tj } .>0j<|~
,=tPh4> `)5E_E3 public String getSFileName() *1fq :-- { #%xzy@` return sFileName; EencMi7J } c-L1 Bkw B6&;nU>; %EuJ~;x(Mg public void setSFileName(String value) 5
#)5Z8`X { B'OUT2cgB sFileName = value; ruG5~dm> } i"~J -{d} ]CD 'Tni; public int getNSplitter() ^#T@NN0T { ?H\K]; return nSplitter; @-9I<)Z/2 } "|yuP1;L 0HA` eot]VO: public void setNSplitter(int nCount) g?.ls{H { 3?F*|E_ nSplitter = nCount; "#d>3M_ } RCSG.*% %I } 0>?%{Xy d|!FI/ 2 HNKq< /* (,wIbwa **Utility.java ?8AchbK;N */ @7Oqp- package NetFox; 7cTDbc!E- !=7(3<? ]_6w(>A@3# public class Utility { gJE m
Em?Z ' XJ>;",[ public Utility() SW!lSIk { ToWiXH)4 @kCFc} 5hN`}Ve } RjC3wO:: 'O%itCy) //线程睡眠 &DQyJJ`k public static void sleep(int nSecond) .v?x>iV { v803@9@ try{ WZ\bm$
Thread.sleep(nSecond); A
dNQS } m5c?A+@fZ catch(Exception e) %~eIx=s { TUw+A6u:p e.printStackTrace (); -?_#Yttu } AI{Tw>hZ } Ah5`Cnv -][~_Hd{ //日志 SvZ~xTit public static void log(String sMsg) 3K2B7loD)~ { y:t@X~ System.err.println(sMsg); N~rA /B]T } rucgav @ev"{dY I$.HG] public static void log(int sMsg) w$Zi'+&* { vGe]; System.err.println(sMsg); c2Q KI~\x } q~esxp } 1:!_AU? 6#[ ]S@zhQ /* zSy^vM;6zf **TestMethod.java V
iY -&q' */ `1}WQS package NetFox; rC`pTN CD}::7$ U"nk AW public class TestMethod { ,%)O/{p_ &8p]yo2zO _yH{LUIj public TestMethod() =E6ND8l@2 { ///xx/weblogic60b2_win.exe ]Sj<1tx7f try{ yx0wR SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); PIk2mX/D_6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); in-|",O`Z SiteFileFetch fileFetch = new SiteFileFetch(bean); tu5g> qb fileFetch.start(); " pg5w } > 2)@(f~g catch(Exception e){e.printStackTrace ();} 9:DT+^BB 3K;V3pJ]. O52B } 73Zx`00 JWZG)I]r =VC"X ?N public static void main(String[] args) GkwdBy+ { /!7 new TestMethod(); bsuGZ } z):LF< } e}f#dR+( 点击下载更多相关资料
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