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/* d`9W **SiteFileFetch.java aE7u5PM */ RHwaJ;:)# package NetFox; tLD~ import java.io.*; ^])e[RN7?n import java.net.*; :H!(?(Pie gf68iR.Gs }A4nJ>`tq public class SiteFileFetch extends Thread { i\=z' x7P([^i Sc1+(z SiteInfoBean siteInfoBean = null; //文件信息Bean >
$w^%I long[] nStartPos; //开始位置 Q;$
9qOF long[] nEndPos; //结束位置 W NwJM FileSplitterFetch[] fileSplitterFetch; //子线程对象 s;fVnaqG: long nFileLength; //文件长度
eeW' [ boolean bFirst = true; //是否第一次取文件 LbJtpwz>z boolean bStop = false; //停止标志 0$eyT-:d File tmpFile; //文件下载的临时信息 ~9JW#HHzn DataOutputStream output; //输出到文件的输出流 |'V DI]p& O!+nF]V4f //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L@{!r=%_> public SiteFileFetch(SiteInfoBean bean) throws IOException )p$\gwr=2 { M11"<3]D siteInfoBean = bean; ^Yj"RM$;N //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Q'Jv}'eK_ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Ni2]6U if(tmpFile.exists ()) 9z5"y|$ { ,c4c@|Bh? bFirst = false; "El^38Ho read_nPos(); G1kaF/`O } Z69+yOJI else N#(jK1`y { 8{R_6BS nStartPos = new long[bean.getNSplitter()]; ! jbEm8bt nEndPos = new long[bean.getNSplitter()]; _Kc1 } Dh2:2Rz=#7 IK*oFo{C=K Y%<`;wK=^
s1X]RXX&j } 1s#yWQ n,t6v5>88 9o-!ecx} public void run() kWB, ;7 { Ya}T2VX //获得文件长度 3g4e']t //分割文件 `1nRcY //实例FileSplitterFetch 9<xTu>7J //启动FileSplitterFetch线程 BG'6;64kx6 //等待子线程返回 8AT;8I<K try{ 2HcsQ*H]G if(bFirst) cyW;,uT)D { :e1'o nFileLength = getFileSize(); JXpoCCe if(nFileLength == -1) nIf N" { o_iEkn System.err.println("File Length is not known!"); rmOQ{2} } vG Y!4@[ else if(nFileLength == -2) Ci;h { xT W3UY System.err.println("File is not access!"); N<9w{zIK( } "Dyym<J else @ru<4`h { |2z}Xm5\ for(int i=0;i<nStartPos.length;i++) {tPnj_|n< { x+4vss nStartPos = (long)(i*(nFileLength/nStartPos.length)); iJ}2"i7M } m&Lt6_vi for(int i=0;i<nEndPos.length-1;i++) Z.!g9fi8> { egfi;8]E nEndPos = nStartPos[i+1]; Osnyd+dJY } E]NY
(1 nEndPos[nEndPos.length-1] = nFileLength; GGH;Z WSe } #C4|@7w% } :]'q#$! d!o.ASL{ _*Pfp+if //启动子线程 aC`Li^ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }/20%fP for(int i=0;i<nStartPos.length;i++) y =R
aJm { NdZ)[f:2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }d_<\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DB#$~(o nStartPos,nEndPos,i); g[M]i6h2 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L^lS^P fileSplitterFetch.start(); tyB)HF } ;TtaH // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XJUEwX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b7bSTFZxC // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", bZ/
hgqS nEndPos = " + nFileLength); h0|[etaf // fileSplitterFetch[nPos.length-1].start(); V{!lk]p}a TZ'aNcGg ^]VcxKU J //等待子线程结束 m$?.Yig? //int count = 0; B~?c3:6 //是否结束while循环 *|oPxQCtK boolean breakWhile = false; F=srkw:*. Vc| NL^ *%X.ym' while(!bStop) T8U[xu.> {
=^Th[B write_nPos(); q-YL]PgV Utility.sleep(500); Q\|18wkW breakWhile = true; 6J\q`q(W( |~eY%LB
L;3aZt,#O for(int i=0;i<nStartPos.length;i++) y`rL=N# { $.a|ae|K if(!fileSplitterFetch.bDownOver) F99A;M8( { mbyih+amCr breakWhile = false; ;Z*'D} break; (-\]A| } /l^y}o %? } usy,V"{ if(breakWhile) UeA2c_
5 break; zj{(p Z1 I0iY+@^5 _lP4}9p //count++; 7,h3V=^)Q //if(count>4) Qwv '< // siteStop(); 9\AS@SH{^T } wlr Ign% VG)="g[%) uJY.5w System.err.println("文件下载结束!"); S6GMUaR } Wab.|\c catch(Exception e){e.printStackTrace ();} 8b7;\C~$p } )!eEO [\d VD/&%O8n Lyr2(^#: //获得文件长度 G?<pBMy public long getFileSize() LJWTSf"f? { _dr*`yXi int nFileLength = -1; 3za`>bUN try{ j7}lF?cJ2 URL url = new URL(siteInfoBean.getSSiteURL()); i:d`{kJ|[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,Aj }]h\L httpConnection.setRequestProperty("User-Agent","NetFox"); wu 2:'y>n N<liS3> lUHtjr int responseCode=httpConnection.getResponseCode(); vL$|9|W( if(responseCode>=400) IcFK,y%1 { f>niFPW" processErrorCode(responseCode); A#35]V06 return -2; //-2 represent access is error I8k } \i0-o8q@I A*F9\mjI5 nWGR5*e: String sHeader; Sph*1c(R *Tp]h 0 vTd-x>n for(int i=1;;i++) >jMH#TZaX { "15=ET //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]G*$W+G] //Utility.log(in.readLine()); /lJjQ]c;> sHeader=httpConnection.getHeaderFieldKey(i); >S'>!w if(sHeader!=null) zh%qS~8Yv { 2ce'fMV if(sHeader.equals("Content-Length")) O&V[g>x"U { &Mj1CvCv nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); BFh$.+D break; /cfHYvnz } Rg&19}BU } A$@o'Q;he else :Fw?{0 break; ZMdW2_*F } fa{@$ppx } 6V2j*J catch(IOException e){e.printStackTrace ();} B\[-fq catch(Exception e){e.printStackTrace ();} 3gc"_C\$ EwQae(PpA :B.G)M\ Utility.log(nFileLength); fhRjYYGI F\LsI;G TatMf;?h& return nFileLength; KO&:06V{ } l.oBcg[ -B9S}NPo q-
:4=vkn //保存下载信息(文件指针位置) yW("G-Nm private void write_nPos() d}-'<Z#G { xNX'~B^4d try{ j"hASBTgp output = new DataOutputStream(new FileOutputStream(tmpFile)); TQJF+;% output.writeInt(nStartPos.length); e+@xsn3 for(int i=0;i<nStartPos.length;i++) QNArZ6UQ { :l"dYfl // output.writeLong(nPos); v`B4(P1Z output.writeLong(fileSplitterFetch.nStartPos); jdM=SBy7q output.writeLong(fileSplitterFetch.nEndPos); S}cF0B1E* } "IwM:v output.close(); )0-o%- e } i&&qbZt catch(IOException e){e.printStackTrace ();} 5UOk)rOf catch(Exception e){e.printStackTrace ();} "8HE^Po/pn } s$GF 95^ ET-Vm >] _-%d9@x //读取保存的下载信息(文件指针位置) jczq`yW private void read_nPos() sRq U]i8l { Pp*}R2 try{ ~@P )tl> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j=ihbR^]Tl int nCount = input.readInt(); Q2c*.Y nStartPos = new long[nCount]; N9]xJgTze nEndPos = new long[nCount]; Ttv'k*$cP for(int i=0;i<nStartPos.length;i++) O]qPmEj { /9_#U#vhY nStartPos = input.readLong(); 2B` 8eb nEndPos = input.readLong(); \r;F2C0*i } FH*RU1Z input.close(); ]XUSqai } l1<?ONB.# catch(IOException e){e.printStackTrace ();} GwQn;gkF catch(Exception e){e.printStackTrace ();} $]*d#`Sy{% } ~/|zlu*jpc _tj&Psp gs`> C( private void processErrorCode(int nErrorCode) [5Y<7DS { <&U!N'CE System.err.println("Error Code : " + nErrorCode); (WE,dY+. } }-p,iTm
zu<3^=3 @^?XaU //停止文件下载 YwAnqAg public void siteStop() kon=il<@ { Ei~f`{i bStop = true; )N7n,_#T> for(int i=0;i<nStartPos.length;i++) 2[up+;%Y fileSplitterFetch.splitterStop(); 5AOfp2O / Z!i;@Wf D$nK`r } K"l0w**Og# } @\}YAa>>"I //负责部分文件的抓取 @ Nb%L&=P8 **FileSplitterFetch.java l h/&__ */ M<[?g5=# package NetFox; CgnXr/!L %MJ;Q?KB 8#59iQl import java.io.*; d+}k g import java.net.*; (1){A8=?o <xn;bp[ de YyaV public class FileSplitterFetch extends Thread { |(ocDmd Z;b+>2oL A}G|Yfn String sURL; //File URL -3hCiKq long nStartPos; //File Snippet Start Position Q)^g3J long nEndPos; //File Snippet End Position .mPg0 int nThreadID; //Thread's ID rkYjq4Z@ boolean bDownOver = false; //Downing is over onl>54M^ boolean bStop = false; //Stop identical f0oek{ FileAccessI fileAccessI = null; //File Access interface Kx6y"
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A1 n}J^6:1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException SxMj,u%X/ { [xdj6W this.sURL = sURL; - DL"-%X. this.nStartPos = nStart; +v15[^F this.nEndPos = nEnd; Q2\ nThreadID = id; $(q8y/,R*- fileAccessI = new FileAccessI(sName,nStartPos);//定位 G;]:$J } _N'75 Vz w PBQ - @2' %o<lF public void run()
(ZPXdr { jJ++h1
K while(nStartPos < nEndPos && !bStop) Z$;"8XUM { F~_;o+e;X &KqVN]1+^ zk=\lp2 try{ e|'N(D}h* URL url = new URL(sURL); !T'X
'Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nq;#_Rkr httpConnection.setRequestProperty("User-Agent","NetFox"); X~RH^VYv String sProperty = "bytes="+nStartPos+"-"; wUp)JI httpConnection.setRequestProperty("RANGE",sProperty); P*G+eqX Utility.log(sProperty); r4eUZ .8R RP`
`mI ?_ RYqolz InputStream input = httpConnection.getInputStream(); X+ f9q0 //logResponseHead(httpConnection); rsF:4G"% JBcY!dy-d TzM=LvA byte[] b = new byte[1024]; 2QayM?k8 int nRead; e.;M.8N#SQ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #":a6%0Q { JJf<*j^G nStartPos += fileAccessI.write(b,0,nRead); L11L23: //if(nThreadID == 1) fLB1)kTS // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 77We;a } UR3 $B%i Alz~-hqQ kx{!b3" Utility.log("Thread " + nThreadID + " is over!"); q)iTn)Z! bDownOver = true; X?dfcS*!n //nPos = fileAccessI.write (b,0,nRead); |}S1o0v{(a } t26ij`V catch(Exception e){e.printStackTrace ();} ;f%|3-q1[ } p&3>
`C } h<3p8eB P s#>y& kO ![X ^V //打印回应的头信息 R&So4},B public void logResponseHead(HttpURLConnection con) 3g'+0tEl { a%K}j\M for(int i=1;;i++) )HVcG0H1 { QIA R String header=con.getHeaderFieldKey(i); D ,M@8h, if(header!=null) M|%c(K#E,3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); @"8R3BN Utility.log(header+" : "+con.getHeaderField(header)); ;<-7*}Dj else rn" pKUd break; \P?A7vuhLs } s4,(26y } Tf-CEHWD a[C&e,)} ~A >oO-0K public void splitterStop() l$XA5#k
{ hC>wFC bStop = true; (cs~@ } K`4GU[ul X8CVY0<o h4 vm{ho } ~:2K#q5C 8:{q8xZ=k \A(5;ZnuD /* 3k{ @.V?] **FileAccess.java .#!mDlY; *//文件访问(定位,写) ,-
HIFbXx@ package NetFox; (I=6Nnt' import java.io.*; MsjnRX:c3u #&siHHs \ 9}
*$n&B public class FileAccessI implements Serializable{ ~3=2=Uf &jm[4'$
*z //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 JEHK:1^ RandomAccessFile oSavedFile; qG9qN.|dC long nPos; D# v?gPo4 oVkr3KZ p>p'.#M public FileAccessI() throws IOException gpAHC { s*JE) this("",0); K0<yvew } kp`0erJqw 3*WS"bt F]5\YYXO public FileAccessI(String sName,long nPos) throws IOException NG9vml { RWikJ oSavedFile = new RandomAccessFile(sName,"rw"); Gvn : c/m; this.nPos = nPos; v@_in(dk oSavedFile.seek(nPos); PU+1=%'V } Hsl{rN
hW%p#g; z%};X$V`J public synchronized int write(byte[] b,int nStart,int nLen) /=ylQn3
* { p&5S|![\ int n = -1; bi,mM,N/ try{ ^s*\Qw{Ii oSavedFile.write(b,nStart,nLen); an KuTI n = nLen; KjYDFrR4 } }vD;DSz: catch(IOException e) DV,DB\P$ { {^wdJZ~QLK e.printStackTrace (); RbAt3k;y } ~:Ixmqi}R owMmCR \`gEu{ return n; i+AUQ0Zbf6 } V6+Zh>'S 1;`Fe":;vC ~B]jV$= } 6Ahr_{ ee<H@LeG VN+\>j- /* @g\;` #l **SiteInfoBean.java Y)OBTX */ -<d(
package NetFox; wA",SBGX Y^3)!> l0#4Fma public class SiteInfoBean { 1RA }aX w"6aha* %7 zn^ v!:[ private String sSiteURL; //Site's URL `WlH*p)z9 private String sFilePath; //Saved File's Path xp=Zd\5W$ private String sFileName; //Saved File's Name j%5a+(H,z; private int nSplitter; //Count of Splited Downloading File K @C4*?P g? I!OG ]|y}\7Aa public SiteInfoBean() ZM
8U]0[X {//nSplitter的缺省值为5 yU!GS- //default value of nSplitter is 5 YM8rJ- this("","","",5); ^k;mn-0 } "5(W[$f*]v Se/ss!If 1=>2uYKR public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 8? F
2jv { L}b'+Wi@ sSiteURL= sURL; vlAy!:CV sFilePath = sPath; GjL W`> sFileName = sName; (QKsB3X this.nSplitter = nSpiltter; ]f5c\\) lfRH`u <d S5||| } g<a<{| +9jivOmK +8eVj#N public String getSSiteURL() 1Df,a#,y" { ,A?{~?u. return sSiteURL; 'rvE } -zR.'x% CMFC"e Se Zg2]GJP public void setSSiteURL(String value) :S#i9# aB { ] .`_,
IO sSiteURL = value; r;$r=Uf r } h*l
cEzG?A oLd:3,p} c{ 7<H public String getSFilePath() !L/tLHk+ { A^t"MYX@ return sFilePath; _=6vW^s } kM,@[V lqauk)(A0 n~.% p public void setSFilePath(String value) <34 7 C{q { Vl-D<M+ih sFilePath = value; JLml#Pu4 } $Q=$?>4U !#C)99L"F 3eJ\aVI>pE public String getSFileName() 50COL66:7 { M.X}K7Z_/ return sFileName; K[n<+e;G } )Gmb?!/^ p0 }!Xf&c{7{ public void setSFileName(String value) OW?uZ<z { ta@ISRK sFileName = value; LMt0'Ml9 } xNn>+J :J<Owh@ SCqu, public int getNSplitter() pz.Y=V\t {
nMLU-C!t return nSplitter; BEFe~* ~ } -?[O"D"c $3lt{ % y|$vtD%c public void setNSplitter(int nCount) bOi};/f { |{zHM2 3gD nSplitter = nCount; pHigxeV2 } C3]\$ } dBsRm{aS 2*N&q|ED )Uc$t${en /* )-MA!\=< **Utility.java %g!yccD9 */ 0~Um^q*'3 package NetFox; M-{b L[`R8n1C <)r,CiS public class Utility { 38Bnf "bv,I-\ : ;|)/ public Utility() d;;>4}XJ] { Bu*W1w\ #|)JD@;Q t-3v1cv" } yg]suU<z] 9:bh3@r/ //线程睡眠 nF|#@O`1 public static void sleep(int nSecond) #j(q/
T{x { tI/mE[W try{ _lP4ez
Y Thread.sleep(nSecond); Ukk-(gjX } UchALR^5 catch(Exception e) i{Y=!r5r { K,`).YK e.printStackTrace (); IKNFYe[9e } Jnh;;< } =; ~%L s!8J.hD'I //日志 W}#QKZ)MB public static void log(String sMsg) G%V=idU*" { EuR!yD System.err.println(sMsg); X
,V= od> } GC5#1+fQ U89]?^|bb :F!dTD$ public static void log(int sMsg) EM>c%BH<N { f;@b
a[ System.err.println(sMsg); u|_ITwk } m'G?0^Ft } N7RG5? #+2:d?t .N2nJ/ /* l<0[ K( **TestMethod.java )A>U<n $h */ Zi[{\7a package NetFox; ;-Y]X(z> mh!N^[=n g:~?U*f- public class TestMethod { ?~]1Gd 3iwoMrp "w:\@Jwu( public TestMethod() |k['wqn" { ///xx/weblogic60b2_win.exe YoSo0fQA try{ !Vp,YN+yN SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Ee$"O6*! //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9TbS>o SiteFileFetch fileFetch = new SiteFileFetch(bean); :FKYYH\ fileFetch.start(); thlpj*| } 3isXgp8 catch(Exception e){e.printStackTrace ();} wB1-|=K1 |p=.Gg=2 $v?! 6: } ,J`lr
U0
Rsa\V6N> :*F3 public static void main(String[] args) PpJE|[] { $BR=IYby new TestMethod(); %%-U. } ZF/J/;uI } WIH4Aw 点击下载更多相关资料
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