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/* mn(/E/ **SiteFileFetch.java J1nXAh)J */ 3,%nkW package NetFox; 9)jo7,VM import java.io.*; @>+^W& import java.net.*; .zQ4/ >).@Nb;e ZUv
ZNf public class SiteFileFetch extends Thread { =kwb`
Z/a 7Y%!,ff 3L?WTS6(u SiteInfoBean siteInfoBean = null; //文件信息Bean H U:1f)aa long[] nStartPos; //开始位置 '_k >*trV long[] nEndPos; //结束位置 ful]OLV+ FileSplitterFetch[] fileSplitterFetch; //子线程对象 hcd!A5 long nFileLength; //文件长度 <zfO1~^ boolean bFirst = true; //是否第一次取文件 =VCi8jDkP boolean bStop = false; //停止标志 /]pX8
d File tmpFile; //文件下载的临时信息 _RN/7\ DataOutputStream output; //输出到文件的输出流 ) )fDOJ u):X>??
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9)#gtDM%J public SiteFileFetch(SiteInfoBean bean) throws IOException Ewa[Y=+tx { "9)1K!tH siteInfoBean = bean; Gs^(YGtU //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6{cybD`Ef& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); UEN YJ*tnP if(tmpFile.exists ()) jQY>9+t { -[G/2F' bFirst = false; [[#xES21F read_nPos(); GTT5<diw } m}; ~JMo] else s.<olxXRW { I/u'bDq nStartPos = new long[bean.getNSplitter()]; 58M'r{8_ nEndPos = new long[bean.getNSplitter()]; I[tAT[ < } qPp1:a" 0Ei\VVK> LBW.*PHW z~GVvgd } e_YW~z=6t ^nG1/} J&
1X public void run() \/?
!
6~ { sZ0g99eX //获得文件长度 _Jf J%YXy //分割文件 l*~"5f03 //实例FileSplitterFetch ~+sne7
6 U //启动FileSplitterFetch线程 U;x99Go: //等待子线程返回 ]$* $0 try{ HY*l 4QK if(bFirst) *=($r%) { ~5-~q0Ge nFileLength = getFileSize(); pP?<[ql[w if(nFileLength == -1) *5ka.=Qs { @C!JtgO% System.err.println("File Length is not known!"); Se!gs> } ( 1QdZD| else if(nFileLength == -2) [d!Af4 { >VpP/Qf System.err.println("File is not access!"); dM);LT8@ } 0S)"Q^6ny else Hj}g1"RA { MsN2A6|33 for(int i=0;i<nStartPos.length;i++) ^4n2
-DvG { .F{}~K] nStartPos = (long)(i*(nFileLength/nStartPos.length)); { Hktu| } a7QlU=\ for(int i=0;i<nEndPos.length-1;i++) eyI-s9#t { &xPOp$Sx~ nEndPos = nStartPos[i+1]; `XQx$I } A5 &>!y nEndPos[nEndPos.length-1] = nFileLength; <) >gg! } |[lxV&SD. } KUl
Zk^a r< d? $ioaunQKP //启动子线程 TMnT#ypf<5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; umq$4}T'$ for(int i=0;i<nStartPos.length;i++) &4ug3 { !?tu!
M<1? fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $i1>?pb3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Hl4vLx@ nStartPos,nEndPos,i); &F@tmM~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (hD X4;4 fileSplitterFetch.start(); e#76h; } -jcrXskb&N // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "6|'&6& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7v4-hfN // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Jgi{7J nEndPos = " + nFileLength); ex;Yn{4 // fileSplitterFetch[nPos.length-1].start(); s+OvS9et_ NKIk d 'ugR!o1 //等待子线程结束 BP7<^`i& //int count = 0; yKX:Z4I/ //是否结束while循环 \kua9bK boolean breakWhile = false; $S"zxEJJ Y ijR-?nrR ss|6_H = while(!bStop) VC_3 ll]vr { ;&7qw69k write_nPos(); .{-iq(3 Utility.sleep(500); +#i,87 breakWhile = true; JsAb q YQfZiz}Fv LiHXWi{s for(int i=0;i<nStartPos.length;i++) r`mzsO-' { +ik N) D if(!fileSplitterFetch.bDownOver) ]8q%bsl+ { ]ci|$@V breakWhile = false; (<5'ceF)X break; B8BY3~}] } ]% ZjD } dxae2 tV if(breakWhile) )nbyV a break; Z;dwn~Tw rsq'60 T^f&58{ 7 //count++; ] BP^.N= //if(count>4) 2yVGEp^ // siteStop(); | eVTxeq } lN]X2 4t .[eSKtbc) FHnHhB [ System.err.println("文件下载结束!"); SbQ{ > } ni 02N3R catch(Exception e){e.printStackTrace ();} lzQ&)7` } ,rvZW}= MZhJ,km) * Kp ^al //获得文件长度 <T=o]M$ public long getFileSize() Di5Op(S(( { B=nx8s int nFileLength = -1; % 'L= try{ KlSY^(kHR URL url = new URL(siteInfoBean.getSSiteURL()); s3fGX|; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @%5F^Vbd httpConnection.setRequestProperty("User-Agent","NetFox"); @)M.u3{\ )9;kzp/ X~/9Vd g int responseCode=httpConnection.getResponseCode(); YRT}fd>R& if(responseCode>=400) sjVl/t`l { 07HX5 Hd processErrorCode(responseCode); =,}!Ns{k return -2; //-2 represent access is error 2[bR6 T89 } hF{mm(qyv Q=9VuTE EzY
scX.[ String sHeader; fh5^Gd~
s*A|9uf5 jak|LOp for(int i=1;;i++) 0$dY;,Q . { 'rcsK //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |Y,X=Ed //Utility.log(in.readLine()); XQ?) sHeader=httpConnection.getHeaderFieldKey(i); a6K$omu if(sHeader!=null) 4QN6BZJ5 { v|hKf6 if(sHeader.equals("Content-Length")) Bg
8t'dw?K { s t 3]Yy nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); M3xi 0/. break; )-6[Bw } wE=8jl* } NIcNL(] else v(WL 3[y; break; u>-uRz<)t } rBL_]\$7} } hrtN.4p[ catch(IOException e){e.printStackTrace ();} I[YfF catch(Exception e){e.printStackTrace ();} )-7(Hv1 ?(XX UW~tS Utility.log(nFileLength); (j\UoKLRt TTjjyZ@ )}k`X<~k return nFileLength; >?Y3WPB<F } r;s3(@[,@ ~o\]K WW
Kr & ) //保存下载信息(文件指针位置) "Mu$3w private void write_nPos() .cnw?EI { jq]\oY8y try{ ]{ l
O output = new DataOutputStream(new FileOutputStream(tmpFile)); ;Q%19f3,6 output.writeInt(nStartPos.length); ckkM)|kK for(int i=0;i<nStartPos.length;i++) pRfHbPV? { =dJEcC_J // output.writeLong(nPos); Mdq'> <ajL output.writeLong(fileSplitterFetch.nStartPos); N_~Wu output.writeLong(fileSplitterFetch.nEndPos); gj(l&F *@ } 8*X
L19N output.close(); d(cYtM,P } )fcpE,g' catch(IOException e){e.printStackTrace ();} [;\<
2 =H catch(Exception e){e.printStackTrace ();} r4qV}-E } ^*T{-U' B=qRZA!DQ? AFnlt //读取保存的下载信息(文件指针位置) REe%>|
private void read_nPos() [}B{e=`! { +vY`?k` try{ jYssz4)tp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); QrRCsy70 int nCount = input.readInt(); (inwKRH nStartPos = new long[nCount]; v6(l#,
nEndPos = new long[nCount]; gl4
f9Ff for(int i=0;i<nStartPos.length;i++) )e$-B]>7z { ~<Qxw>S# nStartPos = input.readLong(); EwJn1Mvq nEndPos = input.readLong(); qQ\hUii } }z%/6`7)| input.close(); TEy.zzt } k-p7Y@`+a catch(IOException e){e.printStackTrace ();} ]0nC;|]@Lx catch(Exception e){e.printStackTrace ();} H5rNLfw
' } +R jD\6bJb h3ZL0Fi* G?X,Y\Lp private void processErrorCode(int nErrorCode) [}Yci:P_ + { j;c^pLUP System.err.println("Error Code : " + nErrorCode); `Y9}5p } Y@xeyMzE )qQg n] 1+[|pXT} //停止文件下载 3B]+]e~ public void siteStop() BwA~*5TFu { <i@jD bStop = true; \% Ih 6 for(int i=0;i<nStartPos.length;i++) [IX!3I[J] fileSplitterFetch.splitterStop(); {ca^yHgGy o".O#^3H% 9S`b7U=P } x6mq['_ } |UiykQ //负责部分文件的抓取 z+`)|c4- **FileSplitterFetch.java :BiR6>1: */ ymJw{&^am package NetFox; B~?Q. <M U0=zuRr n 246!\zf import java.io.*; mLdyt-1 import java.net.*; "PP0PL^5F hndRgCo bGLp0\0[ public class FileSplitterFetch extends Thread { >.sN?5}y ?v*7!2; {dH<Un(4Z String sURL; //File URL Z4tq&^ :c= long nStartPos; //File Snippet Start Position Q/SC7R&"t long nEndPos; //File Snippet End Position 6R,b 8 int nThreadID; //Thread's ID YuuG:Kk boolean bDownOver = false; //Downing is over "+C\f) boolean bStop = false; //Stop identical y^fU_L?p FileAccessI fileAccessI = null; //File Access interface *y$r y] c7N9X 3A SQ.Wj?W) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Dy'l]vN$ { qt;Tfuo this.sURL = sURL; J #5o this.nStartPos = nStart; s: .XF|e{ this.nEndPos = nEnd; |1 6v4 R nThreadID = id; ;'+cT.cmH fileAccessI = new FileAccessI(sName,nStartPos);//定位 z-E4-\a
} ^vz@d+\Kd jCa;g{#@ ,3[<C)'[ public void run() 2fA9L _:0 { `)P_X4e]` while(nStartPos < nEndPos && !bStop) TniKH(w/ { S :|*wB U6 R4UK *XR~fs?/*W try{ y`dzo`f URL url = new URL(sURL); (NlEb'~+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [Y~ s httpConnection.setRequestProperty("User-Agent","NetFox"); a-hGpYJJG String sProperty = "bytes="+nStartPos+"-"; H( m+rk httpConnection.setRequestProperty("RANGE",sProperty); BGjTa.& Utility.log(sProperty); =l9#/G#R !Z)^c& {NDe9V5 InputStream input = httpConnection.getInputStream(); .k(_j.v //logResponseHead(httpConnection); \mGM#E 8hA=$}y&x pdu byte[] b = new byte[1024]; k,(_R= int nRead; |g!#
\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I-hhHm<@ { g>CQO,s;w nStartPos += fileAccessI.write(b,0,nRead); m$g^On //if(nThreadID == 1) (o\~2e: // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (iP,YKG1? } 9mm(?O~'p SsZzYj.d iHB)wC`u Utility.log("Thread " + nThreadID + " is over!"); bc-)y3gHU bDownOver = true; {D#`+uw //nPos = fileAccessI.write (b,0,nRead); ARo5 Ss{ } z`SkKn0f
Y catch(Exception e){e.printStackTrace ();} 0rUf'S
?K } 7L"/4w } 2T9Z{v `Mg
"!n` 4N&}hOM'S //打印回应的头信息 1doqznO public void logResponseHead(HttpURLConnection con) ks$G6WC { (0S7 for(int i=1;;i++) sn%fE { nc)`ISI String header=con.getHeaderFieldKey(i); 8b!_b2Za if(header!=null) %#~Wk|8} Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); 1,,-R*x Utility.log(header+" : "+con.getHeaderField(header)); P9vROzXK else Ok!{2$P8U9 break; &@+;]t } )3 } @T"385> bv "S( DP_ \%(A public void splitterStop() jYv
!} { vCM'nkXY bStop = true; ! ZEKvW } /_\4(vvf /Y:Zqk3 HFOp4 } ^Tx1y[hw$ Z/x~:u_ bkTj
Q /* ojri~erJE? **FileAccess.java lRb)Tz6SE *//文件访问(定位,写) |a+8-@-Tj package NetFox; 2 6A#X import java.io.*; ZUycJ-[ {YFru6$ al/~ public class FileAccessI implements Serializable{ Alz#zBGb =[kv@p //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 x&
S >Mr RandomAccessFile oSavedFile; {$^|^n5j long nPos; v]v f(]"" "'Ik{wGc EZ4qhda public FileAccessI() throws IOException _PF><ODX2 { #~b9H05D this("",0); `m5iZxhw } V.J%4&^X ZfU_4Pl-> @u^Ib33 public FileAccessI(String sName,long nPos) throws IOException UWHC]V? { Hg4Ut/0 oSavedFile = new RandomAccessFile(sName,"rw"); @)B_e*6>' this.nPos = nPos; "<n{/x( oSavedFile.seek(nPos); DWAU8>c+ } @,]v'l!u <IYt*vlm 4.8,&{w<m public synchronized int write(byte[] b,int nStart,int nLen) ;
OsN^ { Hi Yx(hY int n = -1; %}/)_RzQ try{ 4J s>yP oSavedFile.write(b,nStart,nLen); r"+
WUU n = nLen; dn Xc- < } +] #>6/2q catch(IOException e) V4 7Fp { @azS)4L e.printStackTrace (); WKG=d]5 } -}%zus5 ep5aBrN]" L>B0%TP^ return n; GCrN:+E0FJ } N`M5`=. xK/`XY wgrYZ^] } rO
NLbrj Hl#o& *Ui" 3]'3{@{}H /*
#xmUND`@ **SiteInfoBean.java *jYwcW"R{z */ -&c@c@dC package NetFox; I
?1E}bv o}T]f(>} IAfYlS#<yD public class SiteInfoBean { , Le_PJY) n}l Z HBt?cA ' private String sSiteURL; //Site's URL &5B+8> private String sFilePath; //Saved File's Path Z"n]y4h private String sFileName; //Saved File's Name <C&UDj private int nSplitter; //Count of Splited Downloading File nJ,56}
Ac|`5'/Tx o` e~1 public SiteInfoBean() }Eav@3h6 {//nSplitter的缺省值为5 @t_<oOI2 //default value of nSplitter is 5 kz#DBh!& this("","","",5); !n7?w@2a' } 5+U~ZW0|+ I0Vm^\8 :7R\"@V4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E( TY%wO { b`^$2RM& sSiteURL= sURL; +G?3j ,a\ sFilePath = sPath; )T>a|. sFileName = sName; 3}"VUS0wh this.nSplitter = nSpiltter; z
>pq<}R6 U9JqZ! m_pK'jc } @FQ@*XD ;>PV]0bOm> zIQ\_> public String getSSiteURL() iB\d`NUf { ]Y3ALQr! return sSiteURL; zRe0z2 } e@6}?q; &P\T{d2" 9Vp$A$7M public void setSSiteURL(String value) }>grGr%oR { pD){K sSiteURL = value; dZZHk } &B))3WFy UPbG_ #"wZ 2+|[e_ public String getSFilePath() 6ds&n#n { V482V#BP return sFilePath; ;$W|FpR2 } +ux,cx.U" (j2]:BVu z8gp<5= public void setSFilePath(String value) n.XT-X^ { poM VB{U sFilePath = value; _N<8!(|w } _Wgg=A"G `/0FXb
8h tf>?; public String getSFileName() C3D1rS/I { ~V (WD;Mk return sFileName; k&9
b&-=fk } P*\.dAi }APf^Ry f9;M"Pd public void setSFileName(String value) A6-JV8^ { `>K;S!z sFileName = value; T;I a;<mfE } CnJO]0Op3 q'PA2a: w@hm>6j public int getNSplitter() La9dFe-uu{ { H=B8'N return nSplitter; X.g1
312~ } 0'a.Ypf {AJspLcG L>cTI2NB. public void setNSplitter(int nCount) x H\5T! { !)ee{CwNc nSplitter = nCount; "MlY G6 } ptX;-'j( } >i=mw5`D] |',MgA yY8q{\G /* ~Q5L)}8N **Utility.java ao Y"uT+ */ SeKU?\ package NetFox; !5pnl0D K* O"^KX5 gR%fv public class Utility { =p$1v{L8 -fYgTst2 I9H+ $Wjd public Utility() =!
/S | { 9FK%"s` xoPpu
%b0..Zz } 98G>I(Cw% HjLY\.S //线程睡眠 L=
hPu#&/ public static void sleep(int nSecond) @MTm8E6au { <!R~G-D#_T try{ 0zetOlFbO Thread.sleep(nSecond); nCJ)=P.d } G,%R`Xns catch(Exception e) G|v{[>tr { rD
fUTfv|Q e.printStackTrace (); ~gmj/PQ0 } :,% vAI } <t&0[l y?;&(Tcbt8 //日志 eA4@)6W P( public static void log(String sMsg) an=8['X { ~[t%g9 System.err.println(sMsg); b v~"_)C } P;{f+I|` )mS
Aog< gm\P`~+o public static void log(int sMsg) >`SIB; &>j { "I}3*s9Q- System.err.println(sMsg); {+!m]-s } *C Me:a } ~+7q.XL$$K .9PPWY;H RdRF~~R% /* q0&g.=; **TestMethod.java +g>)Bur */ w/#k.YE package NetFox; LW
8LD|@ f9?\Q'v8 jIaAx_ public class TestMethod { Z~CL|= s,)Z8H +QGZ2_vW public TestMethod() 2c
LIz@ { ///xx/weblogic60b2_win.exe R#DnV[!\ try{ U@Y0 z.Y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); '
cR||VX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >$j?2,Za(V SiteFileFetch fileFetch = new SiteFileFetch(bean); .Ce30VE- fileFetch.start(); K1Snag } |>Qj] catch(Exception e){e.printStackTrace ();} 1/:WA:]1, ozy~`$;c &A)AV<=>T } fucG 9B 4"U/T1& O4dJ> O public static void main(String[] args) =W$
f+ { f.-b.nNf new TestMethod(); FCgr } 7j| ^ZuI+ } * G!C 'w\$ 点击下载更多相关资料
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