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/* OhIUm4=|$ **SiteFileFetch.java 3",6 E( */ ISOPKZ#F package NetFox; %K?~$;Z. import java.io.*; cjH
~H8 import java.net.*; ijC;"j/( OB5{EILej M3 u[E public class SiteFileFetch extends Thread { 0(0Ep(Vj I%pQ2T$; ?c(f6p?% SiteInfoBean siteInfoBean = null; //文件信息Bean G=\rlH]N long[] nStartPos; //开始位置 DlTV1X-^1 long[] nEndPos; //结束位置 gM_Z/$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 Qb9) 1 long nFileLength; //文件长度 vzs6YsA boolean bFirst = true; //是否第一次取文件 )W uuU [( boolean bStop = false; //停止标志 <g,xc)[ File tmpFile; //文件下载的临时信息 /V:%}Z DataOutputStream output; //输出到文件的输出流 KvC:(Vqj %!LrC!6P4 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]ujH7T public SiteFileFetch(SiteInfoBean bean) throws IOException 4AUY8Pxp { 0p&:9|'z siteInfoBean = bean; ])0&el3- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @4hxGk= tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7;c{lQOj} if(tmpFile.exists ()) &\K,kS [.r { ]+ug:E{7 bFirst = false; F;`es%8 read_nPos(); trM8p } u{exQ[,E else hnH:G`[F { hg=\L5R nStartPos = new long[bean.getNSplitter()]; _d)w, ;m# nEndPos = new long[bean.getNSplitter()]; O^|,Cbon6 } C+O`3wPZp pcm| !0E$9Xon 4Uz6*IQNl } (\#j3Y)r 0+M1,?+GfF EGU?54 public void run() V?5QpBKI { gXs@FhR0 //获得文件长度 &)<]AG.vd! //分割文件 ENjrv //实例FileSplitterFetch vg
*+>lbA //启动FileSplitterFetch线程 et/mfzV //等待子线程返回 CSwNsFDR% try{ Hm%[d;Z7 if(bFirst) V<nh+Q3<d { Zna
}h{ nFileLength = getFileSize(); :cIE8<\% if(nFileLength == -1) v"y
e\ZG { tWL9>7]G System.err.println("File Length is not known!"); U#@:"v| } Q y$8!( else if(nFileLength == -2) >aN@)=h} { %[;<'s5e~ System.err.println("File is not access!"); 2- UZ|y } ()3+!}; else 2 R 1S>X { j&[63XSe for(int i=0;i<nStartPos.length;i++) 4hZ-^AL"( { v#=WdaNz nStartPos = (long)(i*(nFileLength/nStartPos.length)); tE<L4;t } _/P"ulNb for(int i=0;i<nEndPos.length-1;i++) ^J\)cw { xLq+njH E nEndPos = nStartPos[i+1]; {Yv
|C)O } cidS/OH nEndPos[nEndPos.length-1] = nFileLength; -&@[]/ } 29x
"E$e } CA[k$Sw* q{n~s= hTH"jAC+ //启动子线程 >-EoE;s fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k:`^KtBMl for(int i=0;i<nStartPos.length;i++) /8J2,8vZ { SJIJV6}H fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $(#o)r>_R siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), kZSe#'R's nStartPos,nEndPos,i); .oAg
(@^6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?W%3>A fileSplitterFetch.start(); Wb/@~!+i` } 5j,)}AYO // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .J&~u0g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ",Ek| z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", //K]zu nEndPos = " + nFileLength); !Z<Z"R/ // fileSplitterFetch[nPos.length-1].start(); w[:5uo( ra$_#HY u\smQhQGE //等待子线程结束 [sACPn$f //int count = 0; {l\v J#r: //是否结束while循环 kd!f/'E! boolean breakWhile = false; i|.!*/qF S#2'Jw B>YrDJUN while(!bStop) 9Ni$nZN { Ho\K
%#u write_nPos(); e[>(L% QV+ Utility.sleep(500); (J$JIPF breakWhile = true; 3l5q?" $
2Xe2%{ d=N5cCqq for(int i=0;i<nStartPos.length;i++) u&2uQ-T0 { [C
P V5\2 if(!fileSplitterFetch.bDownOver) Hagj^8 { ?8YHz breakWhile = false; zSDiJ$Xk break; >d#B149 } ;(VJZ_ } M/Bn^A8@ if(breakWhile) LOR$d^l break; ^Q2K0'm5 ?HZ+fS,- :%!=Ej.J //count++; ~A>3k2N/e //if(count>4) >:KPvq!0 // siteStop(); dRas9g } } [D[ZLv NVJvCs)3f 3U1xKF System.err.println("文件下载结束!"); ^9qncvV } ;l}TUo catch(Exception e){e.printStackTrace ();} vJmE} } [rE,fR TX*s T {3
zq.e{ //获得文件长度 c>=[|F{{e public long getFileSize() 4)Z78H%> { %w'@:~0 int nFileLength = -1; S WYiI try{ nVs0$?} URL url = new URL(siteInfoBean.getSSiteURL()); evu @uq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kw}J~f2 httpConnection.setRequestProperty("User-Agent","NetFox"); dwB-WF%k ,B!u* GMB%A int responseCode=httpConnection.getResponseCode(); yBs if(responseCode>=400) Il*wVNrZI { VGq2ITg9eE processErrorCode(responseCode); |CStw"Fog return -2; //-2 represent access is error d=H C;T) } k@KX=mG< ]5uCs[ 6D w[n String sHeader; ~;Xdz/ .NwHr6/s* !oM1 for(int i=1;;i++) }3M\&}=8 { &d9";V"E //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F0Rk[GM //Utility.log(in.readLine()); WElB,a-RCp sHeader=httpConnection.getHeaderFieldKey(i); vIz~B2%x if(sHeader!=null) J}%&;uv
{ wQ4/eQ* if(sHeader.equals("Content-Length")) M6y:ze { "d%":F( nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 9b()ck-\F# break; ,v>P05 } =(.HO:# } 2l8jw:=H else bWjW_$8 break; ,#D&* } d}ue/hdw } @ ;rU# catch(IOException e){e.printStackTrace ();} /v=MGX@r catch(Exception e){e.printStackTrace ();} A!goR-J] `')3} 5I t+ S+a Utility.log(nFileLength); (Cqhk:F )[G5qTO H.!M_aJH return nFileLength; Sf
lHSMFw } b _cD
>A 0u-'{6 Jr
9\j3J{ //保存下载信息(文件指针位置) 6S<J'9sE private void write_nPos() "aAzG+NM { ~{RXc+ try{ zcP_-q]1 output = new DataOutputStream(new FileOutputStream(tmpFile)); lE$X9yIt output.writeInt(nStartPos.length); 60^dzi!vs for(int i=0;i<nStartPos.length;i++) F7cv`i?2." { N[ E
t // output.writeLong(nPos); 80
i<Ij8J output.writeLong(fileSplitterFetch.nStartPos); ndW??wiM output.writeLong(fileSplitterFetch.nEndPos); z9'ME } |;Jcf3e( output.close(); Rf2;O< } 'd0]`2tVg4 catch(IOException e){e.printStackTrace ();} u=
!?<Q catch(Exception e){e.printStackTrace ();} &*[T }
h ej 1r|'n aiZ oT%~)g //读取保存的下载信息(文件指针位置) F0+ u#/# private void read_nPos() ]"{K5s7 { iS=}| 8" try{ 4CfPa6_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }(20MW8rMc int nCount = input.readInt(); j`='SzVloW nStartPos = new long[nCount]; WPCaxA+l nEndPos = new long[nCount]; ~.yt for(int i=0;i<nStartPos.length;i++) 4^ $ { l;F3kA nStartPos = input.readLong(); >/ W:*^g) nEndPos = input.readLong(); 0rjxWPc } 7L? ~;;L$ input.close(); {b=]JPE } 2c_#q1/Z/ catch(IOException e){e.printStackTrace ();} vX/~34o]\ catch(Exception e){e.printStackTrace ();} ?psvhB{O } UR:cBr zD7\Gv kImS'i{A private void processErrorCode(int nErrorCode) '-S^z"ZrI { /
~w\Npf0 System.err.println("Error Code : " + nErrorCode); 5e6]v2 k } IF$f^$ y]+i.8[ \ C~Y //停止文件下载 kd9hz-* public void siteStop() d7N}-nsB { b P4R bStop = true; ]k
"
j for(int i=0;i<nStartPos.length;i++) i|)<#Ywl fileSplitterFetch.splitterStop(); ,*}SfCon _Cj u C`7 AQQeLdTq } s(r(! FZ } ]fnc.^{ //负责部分文件的抓取 o!gl
:izb **FileSplitterFetch.java =K-B
I */ m9a(f >C package NetFox; Ca0~K42~
TB1E1 w8%<O^wN, import java.io.*; }{ J<Wzw import java.net.*; R<a7TkL4? RxjC sjg v<HhB.t. public class FileSplitterFetch extends Thread { /P Qz$e-!Y (kK6=Mrf ^8ZVB.Fv String sURL; //File URL J-au{eP^
long nStartPos; //File Snippet Start Position #t>w)`bA- long nEndPos; //File Snippet End Position GxuFO5wz int nThreadID; //Thread's ID sFT-aLpL@V boolean bDownOver = false; //Downing is over
R%"wf boolean bStop = false; //Stop identical *"d" FileAccessI fileAccessI = null; //File Access interface y.=ur,Nd _qR1M):yJ j7?53e public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException hg/G7Ur" { KtG|m'\D this.sURL = sURL; Uw8O"}U8 this.nStartPos = nStart; 4'cdV0] this.nEndPos = nEnd; t"cGv32b nThreadID = id; PeEC|&x fileAccessI = new FileAccessI(sName,nStartPos);//定位 =EA*h_"q9 } W`*S?QGzl@ ,JYvfCA j,Eo/f+j5 public void run() ]bz']` {
{F+7> X while(nStartPos < nEndPos && !bStop) b*+Od8r { /U4F\pZl CE=&ZHt9 l&R~I6^E try{ 5Q;Fwtm URL url = new URL(sURL); 3P2H!r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Gc^w,n[E httpConnection.setRequestProperty("User-Agent","NetFox"); NuRxk eEO String sProperty = "bytes="+nStartPos+"-"; 6FFQoE|n httpConnection.setRequestProperty("RANGE",sProperty); KB0HM Utility.log(sProperty); 82nQ] AcqsXBKd O(2)A>} InputStream input = httpConnection.getInputStream(); -NHA{?6r //logResponseHead(httpConnection); swss#?.se <5%x3e"7u jQxv`H byte[] b = new byte[1024]; sgW*0o int nRead; {dM18; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) fI9 TzpV { "g;^R/sfq nStartPos += fileAccessI.write(b,0,nRead); b) "bX} //if(nThreadID == 1) t:B~P,r // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Rf||(KC< } 7s+3^' +&6R(7XC hsr,a{B%$ Utility.log("Thread " + nThreadID + " is over!"); LmE%`qNg bDownOver = true; 2Dgulx5kGZ //nPos = fileAccessI.write (b,0,nRead); o?BcpWp } :s`~m;Y9? catch(Exception e){e.printStackTrace ();} D[yOFJ~p) } j
qfxQ } .Zv@iL5 `dO)}}| y Xxhzzm-B //打印回应的头信息 00X~/'! public void logResponseHead(HttpURLConnection con) Wnm?a!j5 { a NhI<.v for(int i=1;;i++) 9#Gz2u $ { e"Kg/*Ji1 String header=con.getHeaderFieldKey(i); `a2%U/U if(header!=null) SIQ 7oxS4 //responseHeaders.put(header,httpConnection.getHeaderField(header)); q$6fb)2I]e Utility.log(header+" : "+con.getHeaderField(header)); "Qj;pqR else r%QTUuRXC3 break; cy T,tN } Eh/B[u7T[ } kcGs2Y_*& )!M %clm. \ <b-I public void splitterStop() }i0(^"SoXZ { !A!}j.s bStop = true; f"My;K $l; } I<yd=#:n `p0+j ++=t|ZS
U } O7 5^(keW @AET.qGC X!#rw= Q /* v0Ww~4|], **FileAccess.java *-0tj~)> *//文件访问(定位,写) s~(!m. R package NetFox; Hs,pY(l^ import java.io.*; 6%?bl{pNn r1dP9MT\8 WxO2 public class FileAccessI implements Serializable{ ^~\cx75D >.'rN>B+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ldqn<wNnI RandomAccessFile oSavedFile; =*<Cw?Gc long nPos; Xo^P=uf% 7:iTx;,v _gDEIoBp public FileAccessI() throws IOException {6}H}_(] { \o}m]v
i this("",0); A9qbE } 5A^$!q P 3jH-!M5 3,;;C( public FileAccessI(String sName,long nPos) throws IOException CRXIVver { BOqu$f+ oSavedFile = new RandomAccessFile(sName,"rw"); Fb8~2N"3 this.nPos = nPos; wNQhz.>y oSavedFile.seek(nPos); sv}k_6XgY } ?VUW.- 2L?jp:$;X }_,1i3Rip public synchronized int write(byte[] b,int nStart,int nLen) W%$sA}O { %#7NCdk;S int n = -1; Z|l/6L8 try{ &USKudXmb oSavedFile.write(b,nStart,nLen); fviq}. n = nLen; ).IB{+ } NmbA~i catch(IOException e) vxN,oa{hf { p@`]9tLP(K e.printStackTrace (); Zw4z`x1f } B+)HDIPa- G_m$W3 zS V!^5#A< return n; :&59N^So| } VAGQR&T? ,e]|[,r#5 uKOsYN%D } \Z~|ry0v{d f&5'1tG cviPCjM /* kF,_o/Jc **SiteInfoBean.java Cf&.hod */ qGezmkNFm package NetFox; J*I G]2'H O:G5n 5J ePD~SO9* public class SiteInfoBean { ! J7ExfEA &;x*uG l>t0 H($ private String sSiteURL; //Site's URL GxynLXWo> private String sFilePath; //Saved File's Path R?Ou=p
. private String sFileName; //Saved File's Name Quts~Q private int nSplitter; //Count of Splited Downloading File .@`5>_ +9fQ YJBA E&_q"jJRi public SiteInfoBean() S}}L&
_ {//nSplitter的缺省值为5 W{l{O1, //default value of nSplitter is 5 7]}2`^9 this("","","",5); Rk$ } N~)RR {$w +N>z|T< Ij{ K\{y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) x^XP<R{D { 04E
S>'@ sSiteURL= sURL; $p)e.ZMgE sFilePath = sPath; 0Z&ua sFileName = sName; ZQ)vvD< this.nSplitter = nSpiltter; :RG=3T[ 9cJ1J7y F`eo3z } ZP(T=Q "">{8 IA3m.Vxj ^ public String getSSiteURL() jFH wu* { LUfo@R return sSiteURL; d cG)ql4d } fpA%:V .:(T}\]R \<kQ::o1y public void setSSiteURL(String value) ,w|Or}h]7 { hx$bY sSiteURL = value; 9lR- } DWXHx E06)&tF "wj~KbT}& public String getSFilePath() pkEx.R) { 4%"Df1U return sFilePath; 0wpGIT!2 } *Kmo1>^ ,(v=ZeI XQI!G_\+C public void setSFilePath(String value) &S9O:>=* { pp1kcrE\M sFilePath = value; n>L24rL } 3ahbv%y 5}|bDJ$% _ ]wHXrB8vx public String getSFileName() QqCwyK0 { Z1N=tL return sFileName; & oj$h } kj]m@mS[ D&|HS! G@8wv J public void setSFileName(String value) ^"GDaMF { fb_q2p}
G sFileName = value; ,wB)hp } L
4Sa,ZL @E%fAC K0^Tg+U($p public int getNSplitter() rvRIKc|}l { {Z_?7J&z return nSplitter; /=gU } ,c6c=di WJBwo%J H|I.h{: public void setNSplitter(int nCount) (yv)zg9 { yGE)EBH nSplitter = nCount; aBT8mK -. } Xp?WoC N } UYkuz m.&"D>
\t $LHF=tYS /* n|Gw?@CU7 **Utility.java jUCDf-_ m */ (AswV7aGe package NetFox; .&;:X ) <ql:n mt]50}eK public class Utility { XEb+Z7L 1 |l673FcJ TSKR~3D# public Utility() ,'a[1RN { #|;;>YnZ =g<Y[Fi2 O_^
uLp } naiy] oY" {9|S,<9 //线程睡眠 jFGY`9Zw0 public static void sleep(int nSecond) XBN,{ { y7-daek try{ )(W%Hmi Thread.sleep(nSecond); Oi$$vjs2 } 7da~+(yhr catch(Exception e) Pw/$
}Q9X { 6;p"xC- e.printStackTrace (); wOr pp3I } E#/vgm=W; } )mE67{YJh~ 4]m?8j)
6b //日志 'aJm4W&j public static void log(String sMsg) Z.3*sp0
yv { z.0!FUd System.err.println(sMsg); LhQidvCNJ } _2rxDd1#. TM0DR'. *@[N~:z/ public static void log(int sMsg) R*>EbOuI { }`D-]/T8. System.err.println(sMsg); J%lEyU } )d7U3i } g <5G# QI{<q< @+(a{%~7y /* 6M X4h **TestMethod.java C.Re*;EI, */ mFJb9, package NetFox; nWsR;~pK ~)%DiGW& P(Z\y^S public class TestMethod { sT+\
z $Y<(~E$FX >&l{_b\k public TestMethod() ]R6Z(^XT,E { ///xx/weblogic60b2_win.exe +8|r_z\A5a try{ /<it2= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]]lM) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); nQM7@"R SiteFileFetch fileFetch = new SiteFileFetch(bean); ,7*-%05[\ fileFetch.start(); Nj|~3
*KO } Uiu9o]n catch(Exception e){e.printStackTrace ();} IXt cHAgX Eumdv#Qg O>sE~~g]? } Ll'!aar, ]WZi + .}DL%E`n public static void main(String[] args) ~.f[K{h8 { Q2K)Nl >_ new TestMethod(); 31n|ScXv } Z=CY6Zu7 } C;.+ kE 点击下载更多相关资料
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