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/* ?D8+wj **SiteFileFetch.java 2ms@CQy(00 */ uFl19 package NetFox; b<1+q{0r import java.io.*; IyJHKDFk import java.net.*; nlsif ~]LkQQ' 8\])p sb9 public class SiteFileFetch extends Thread { &8R!`uh1 :,[=g$CT: d]!`II SiteInfoBean siteInfoBean = null; //文件信息Bean 5?M d long[] nStartPos; //开始位置 ^p}|""\j long[] nEndPos; //结束位置 SoPiEq FileSplitterFetch[] fileSplitterFetch; //子线程对象 N:nhS3N<L long nFileLength; //文件长度 $7
FT0?kG boolean bFirst = true; //是否第一次取文件 G>>TB{} boolean bStop = false; //停止标志 &w7Ev21 File tmpFile; //文件下载的临时信息 *Tyr DataOutputStream output; //输出到文件的输出流 66 @#V I`-N]sf^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @&fAR2 public SiteFileFetch(SiteInfoBean bean) throws IOException ?Q#yf8 { Q-7C'| siteInfoBean = bean; j,@@[{tu //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); LUN"p#1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); -Mx\W|YK if(tmpFile.exists ()) wu53e= / { YOE!+MiO bFirst = false; GX-V|hLaGX read_nPos(); oTLA&dy@ } .m/$ku{/J else `j)S7KN { #ssSs]zl nStartPos = new long[bean.getNSplitter()]; jS<(Oo nEndPos = new long[bean.getNSplitter()]; %f'mW2 } (]gd$BgD :+*q,lX8 TVs#, 3I):W9$Qp } eF=cMC
XMpa87\ & cV$`L public void run() , tb\^ { DITo.PU //获得文件长度 bpp{Z1/4 //分割文件 Y5,[udF:O //实例FileSplitterFetch ":!7R<t //启动FileSplitterFetch线程 (RBzpAiH //等待子线程返回 ^T&@(|o try{ AAW])c`. if(bFirst) [QZ g=." { PqDffZ^z nFileLength = getFileSize(); i&_&4 if(nFileLength == -1) TG^?J` { l>){cI/D# System.err.println("File Length is not known!"); -'%>Fon } F)n^pT else if(nFileLength == -2) g:rjt1w`D { F :p9y_W System.err.println("File is not access!"); =&~7Q" } d":GsI?3 else U_[<,JE { l2Pry'3 for(int i=0;i<nStartPos.length;i++) aP&bW))CI { 8gn12._x nStartPos = (long)(i*(nFileLength/nStartPos.length)); orON)Sks } qSA]61U& for(int i=0;i<nEndPos.length-1;i++) l.nd Wv { o7i>D6^^ nEndPos = nStartPos[i+1]; :f_fp(T } xmXuBp:M(R nEndPos[nEndPos.length-1] = nFileLength; w_ONy9 }
bo|3sN+D } xm$-:N0q 9Rd&Jq^ UI%Z`.& //启动子线程 $s]vZ(H fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M)6iYA%$ for(int i=0;i<nStartPos.length;i++) B9(@. { ic;M=dsh: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), OC=g 1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zN3b`K. i nStartPos,nEndPos,i); L'L[Vpx Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); euiP<[|h= fileSplitterFetch.start(); -~] q?k? } j/p1/sJ[y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PX/7 :D? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); %iR"eEE // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", fK{m7?V nEndPos = " + nFileLength); Em ;2fh // fileSplitterFetch[nPos.length-1].start(); )eD9H*mq (J 1:J GTuxMg` //等待子线程结束 f Hd|tl //int count = 0; VSjt|F)t //是否结束while循环 (|9t+KP boolean breakWhile = false; G$mAyK: /P%OXn$i/ 5_7y 1 while(!bStop) ISHzlEY { fW=vN0Z write_nPos(); K
7OIT2- Utility.sleep(500); F87/p breakWhile = true; 7SJR_G6,{ Z_;!f}X 8}K^o>J&K for(int i=0;i<nStartPos.length;i++) )lZoXt_3 { Rn$[P.|| if(!fileSplitterFetch.bDownOver) rt0_[i { l=PZlH
y1G breakWhile = false; 0PD=/fh[ break; nq5qUErew } 6^e}^~| } 10d.&vNw if(breakWhile) IhjZ{oV/@ break; *$Z,kZ^^ #IR,KX3]A 6o
d^+>U //count++; PC!g?6J //if(count>4) ^D8~s; ? // siteStop(); 1I?`3N } 2h:{6Gq8 R8-=N+hX ?[<#>,W System.err.println("文件下载结束!"); yu>)[|- } SA?lDRF catch(Exception e){e.printStackTrace ();} PH$C."Vv } +Ly@5y" 19b@QgfWpb ?DGg.2f //获得文件长度 QpD-%gN public long getFileSize() HtV8=.^ { C2{*m{
D int nFileLength = -1; _9C,N2a{C try{ m+Kl
URL url = new URL(siteInfoBean.getSSiteURL()); (YM2Cv{4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6Ts[NXa httpConnection.setRequestProperty("User-Agent","NetFox"); 1ixBwnp? }qT{" *SC MY}/h@ int responseCode=httpConnection.getResponseCode(); A{p_I< if(responseCode>=400) I(H9-!& { Cto>~pV processErrorCode(responseCode); c] - return -2; //-2 represent access is error +ib&6IU } GL%)s?
h
S)lQl:^ #&X5Di[A String sHeader; U"RA*| ,N1pw w? E7q,6f3@r for(int i=1;;i++) N[A9J7}_R { ,bzC|AK //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); {)(Mkm+d //Utility.log(in.readLine()); Re+oCJ sHeader=httpConnection.getHeaderFieldKey(i); Kr?<7vMT5 if(sHeader!=null) ~BiLzT1, { Gz52^O: if(sHeader.equals("Content-Length")) iG#92e4 { p:V1VHT, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); M`n0
qy break; }kG>6_p? } D#P]tt.Z } R"j<C13;% else CG;+Z-"X break; g:Q:cSg< } {n&GZG"f } Id1de>:; catch(IOException e){e.printStackTrace ();} 9k\M<jA catch(Exception e){e.printStackTrace ();} *cZ7? !mmSF1f Tm$8\c4V:* Utility.log(nFileLength); }@"v7X $ v"o_V| ep4?;Qmho return nFileLength; W[R`],x` } V qcw2 *mH&Gn1 r
KYQ 8T //保存下载信息(文件指针位置) &@FufpPw/ private void write_nPos() lL'Bop@ { <Sr:pm try{ B}nT>Ub output = new DataOutputStream(new FileOutputStream(tmpFile)); KrR`A(=WL output.writeInt(nStartPos.length); LP !d|X for(int i=0;i<nStartPos.length;i++) 3?D{iMRM { m&yHtnt // output.writeLong(nPos); fw
VI%0C@ output.writeLong(fileSplitterFetch.nStartPos); "!_vQ^y output.writeLong(fileSplitterFetch.nEndPos); R;pIi/yDRe } BNe>Lk o output.close(); $&!|G-0' } <*+[E!oi catch(IOException e){e.printStackTrace ();} ~k%XW$cV catch(Exception e){e.printStackTrace ();} ayh235>a( } -BSO$'{7 b6xz\zCL K:A:3~I!NW //读取保存的下载信息(文件指针位置) "_2;+@+ private void read_nPos() M)U)Sc zHO { *2fJdY try{ (&u'S+ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); rp^:{6O int nCount = input.readInt(); re,}}' nStartPos = new long[nCount]; q6b&b^r+H nEndPos = new long[nCount]; B`gH({U for(int i=0;i<nStartPos.length;i++) I2krxLPd { D^a(|L3; nStartPos = input.readLong(); :wEy""*N0 nEndPos = input.readLong(); HYG1BfEaW } &-w. rF@ input.close(); ]q"y P0 } wz{c;v\J^ catch(IOException e){e.printStackTrace ();} C4GkFD
catch(Exception e){e.printStackTrace ();} r i)`e } Ms5R7<O.7 _2)QL ?o`:V|<v private void processErrorCode(int nErrorCode) R](cko= { =Ot_P7'5gv System.err.println("Error Code : " + nErrorCode); Gx4{ 9 } ;U$Rd,T4S p>f?Rw_ z_=V6MDM //停止文件下载 )||CU]"b? public void siteStop() H:
;XU { $Yp.BE<} bStop = true; U(Bmffn4Z for(int i=0;i<nStartPos.length;i++) 2Q7X"ek~[ fileSplitterFetch.splitterStop(); a]Y9;( 2 <@g * -PU.Uw] } `
@lNt} } :6Tv4ZUvcG //负责部分文件的抓取 &;`E3$> **FileSplitterFetch.java u.*}'C>^^v */ 4)>S3Yr package NetFox; KV-h~C OT$++cj^ \KS.A
4 import java.io.*; qq_ZkU@xg import java.net.*; O4:_c-V2 uRYq.`v, 5iI(A'R[7 public class FileSplitterFetch extends Thread { j,SZJ{ebXg yqtaQ0F~ a8G<x< String sURL; //File URL UI'fzlB long nStartPos; //File Snippet Start Position Ino]::ZJ/ long nEndPos; //File Snippet End Position '1fyBU int nThreadID; //Thread's ID @,}tY ?>a boolean bDownOver = false; //Downing is over M ac?HI boolean bStop = false; //Stop identical G1*,~1i FileAccessI fileAccessI = null; //File Access interface .>~er?- U_.}V m8G/;V[x public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \rO!lvX { +\u\BJ!LAJ this.sURL = sURL; f! )yE`4- this.nStartPos = nStart; 'i: lV' this.nEndPos = nEnd; 86!$<!I nThreadID = id; $ER9u2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 F- M)6&T } 'H4?V B2KBJ4rI[1 FFe{=H,= public void run() p:eaZ { "q!*RO'a while(nStartPos < nEndPos && !bStop) l8 $.k5X { \qlz< vlipB} c/:k|x try{ \m1^sFMZ URL url = new URL(sURL); d2)]6)z6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); U[OUIXUi httpConnection.setRequestProperty("User-Agent","NetFox"); q}0I`$MU String sProperty = "bytes="+nStartPos+"-"; B-"F67 : httpConnection.setRequestProperty("RANGE",sProperty); +(z[8BJl Utility.log(sProperty); YfMs~}h, ue4{h #?eMEws InputStream input = httpConnection.getInputStream(); dWe%6s;
//logResponseHead(httpConnection); g!r)yzK PnB2a'(^@? rW_cLdh]# byte[] b = new byte[1024]; %$Xt1ub6( int nRead; <b\8<mTr while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) NS TO\36 { AxF$7J( nStartPos += fileAccessI.write(b,0,nRead); oIMS >& //if(nThreadID == 1) (H:A|Lw // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); fF=tT C } ]{#Xcqx ?YDMl 1CM8P3 Utility.log("Thread " + nThreadID + " is over!"); )q\6pO@ bDownOver = true; KoWG:~>| //nPos = fileAccessI.write (b,0,nRead); #`l&HV } I3i zLi catch(Exception e){e.printStackTrace ();} +"JWsD(C( } 4d}n0b\d } '<*%<J{( _JA)""l% +_gA"I
//打印回应的头信息 gS`Z>+V5!c public void logResponseHead(HttpURLConnection con) G `B=:s] { cWo__EE for(int i=1;;i++) Y?zo") { <Lt"e8Z> x String header=con.getHeaderFieldKey(i); tK'9%yA\ if(header!=null) qSD3]Dv" //responseHeaders.put(header,httpConnection.getHeaderField(header)); *,*XOd:3TL Utility.log(header+" : "+con.getHeaderField(header)); hx/A215L else b^()[4M; break; PL!dkaD^y> } =4U$9jo!; } ,JTyOBB<I "A5z!6T{ L'"c;FF02i public void splitterStop() x&m(h1h { $(08!U
bStop = true; mv`b3 $ } nPl,qcyY ?P#\CW %|f@WxNrU } ~x@V"rxGw F[F
NtZ 0;*[}M]Z /* /q7$"wP **FileAccess.java >?G!>kw *//文件访问(定位,写) ljz=u;O) package NetFox; EU'rdG*t/R import java.io.*; k)y<iHR_o A1z<2.R QA)"3g
public class FileAccessI implements Serializable{ nrXKS&6 "GJ.`Hj //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 YB^m!A),I[ RandomAccessFile oSavedFile; 6lkCLH long nPos; 'P4V_VMK 9i{(GO :b_hF public FileAccessI() throws IOException pL> Yx> { z8)&ekG this("",0); 8=
82x } =*>.z@WQ eu$"GbqY 2
'$nz public FileAccessI(String sName,long nPos) throws IOException rg
0u#- { {!wd5C@ oSavedFile = new RandomAccessFile(sName,"rw"); \8vZZ t this.nPos = nPos; M9(lxu y1 oSavedFile.seek(nPos); "+
k}#<P4\ } fi&>;0?7 i1]}Q$ 62G%.'7 public synchronized int write(byte[] b,int nStart,int nLen) AI,E9 { 300[2}Y] int n = -1; 9+.3GRt7 try{ /c4$m3?] oSavedFile.write(b,nStart,nLen); p!<PRms@ n = nLen; )oM%
N } uaCI2I catch(IOException e) c]qh)F$s8 { :3J`+V}9; e.printStackTrace (); r/0AM}[!*j } 2n#H%&^?a }/IP\1bG (hRg0Z= return n; 1 .o0" } sqRvnCD! ,ZO?D|M1 XB:E<I'q!3 } 4s"x}c">F ' 8Q}pp` NpbZt;%t /* fl4'dv **SiteInfoBean.java R4zOiBi'B */ 55,2eg#{O package NetFox; %/!f^PIwX !RjC0, ,Hp7`I>/ public class SiteInfoBean { r CUs }We-sZ/w7r 3-[+g}kak? private String sSiteURL; //Site's URL 1&Mpx!K*T private String sFilePath; //Saved File's Path 58`Dcx,yJ private String sFileName; //Saved File's Name %/_E8GE
private int nSplitter; //Count of Splited Downloading File +vV?[e 0[8uuqV[cB n*#HokX public SiteInfoBean() _U,Hi?b"$} {//nSplitter的缺省值为5 Wi~?2-!
//default value of nSplitter is 5 }b{7+ +
Ah this("","","",5); UA4MtTp` } 9tmnx')_ GK3cQw :01B)~^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) @Yw42`>!s { e{^lD.E sSiteURL= sURL; '?3(& sFilePath = sPath; VmXXj6l& sFileName = sName; -f?,%6(1 this.nSplitter = nSpiltter; 1] .m4vC 3S%/>)k TpHzf3.I } p>+Q6o9O EQ"+G[j~x Z8f?uF public String getSSiteURL() zP|^@Homk { r*FAUb`bG return sSiteURL; \(zUI } ^^YP kh6sS ~ET XXu${I &F*eo`o}6 public void setSSiteURL(String value) (SA^>r { 1DH P5q sSiteURL = value; dMI G2log } ~Ds3-#mMy {qs>yQ6a:- 3aJYl3:0B public String getSFilePath() }5Km \OI { @jZ1WHS_a return sFilePath; f'Oj01[ } 9j0o)] ZJ/K MW Nkn2\w public void setSFilePath(String value) #TB
3|= { e=_Ng
j) sFilePath = value; jFI`CA6P } s;[WN. L9!\\U DIkf#} public String getSFileName() fW=eB'Sl { 7IrH(~Fo return sFileName; 3A.lS+P1 } :+8qtIytKX {?r5~T`2 Sj viH public void setSFileName(String value) e`K{ { +{%)}?F sFileName = value; R ^INl@(O } #K/95!) ROO@EQ#`Z E+$D$a public int getNSplitter() vLGnLpt { z]&?}o return nSplitter; g#G ]}8C } ezS@`_pR; {9cjitl zT>BC}~.b public void setNSplitter(int nCount) lx> ."rW { E=]|v+#~ nSplitter = nCount; ss`Sl$ } vb9C } k=O '*<I<? z; _s}`ohKvD /* .d?LRf **Utility.java O0eM*~zI */ }:!X@C~ package NetFox; k[y^7,r !&5*H06 |3`8$- public class Utility { T`GiM%R;g 1-|aeJ mrig5{ public Utility() Mt@Ma ]! { WYIv&h<h" +fQJ#?N2n 2AEVBkF;M } ZzxWKIE'c eYevj[c; //线程睡眠 YdN]Tqc public static void sleep(int nSecond) Zg|l:^E { DHZ`y[&}|N try{ SF da?> Thread.sleep(nSecond); v4XEp
} ClNuO catch(Exception e) QZuKM 'D+ { h05<1>?| e.printStackTrace (); 20I/En } e`Co =' } Of}C.N8 RrdLh z2N //日志 OP\L public static void log(String sMsg) kM(m$Oo. { )4>7X)j> System.err.println(sMsg); LCuz_LTFq{ } yI^7sf7k oVW>PEgB- \9`.jB~< public static void log(int sMsg) *Rxn3tR7 { Rr}m(e= System.err.println(sMsg); gMp' S } 3rR1/\ } ` $q0fTz qqys`. 9_ZGb"(Lj /* \ _?d?:#RD **TestMethod.java T1'\!6_5 */ 5=R]1YI~$ package NetFox; GInw7 Q 9E.AN &y7xL-xP public class TestMethod { +k[w)7Q ls~9qkAyLx
;v/un public TestMethod() !OMCsUZ { ///xx/weblogic60b2_win.exe ~wO-Hgd try{ p|@#IoA/e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); N|3#pHm@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }Kn
l SiteFileFetch fileFetch = new SiteFileFetch(bean); 7k00lKA\w fileFetch.start(); @uanej0q7 } |*Oi:)qt catch(Exception e){e.printStackTrace ();} p7HLSB2Rp U+C^"[B DO( 3hIj }
:6/$/`I0W ^;tB,7:*V lS#^v#uS public static void main(String[] args) -!K&\hEjj { =^ \?{oV new TestMethod(); %jHe_8=o } 1U?5/Ja } H!>>|6OPF 点击下载更多相关资料
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