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/* 329xo03-[ **SiteFileFetch.java )sS<%Xf */ H*\ }W package NetFox; 'b^:"\t'Rh import java.io.*; t=e0z^2i+ import java.net.*; 2iG(v._x (wY%$kW4 gCm?nb) public class SiteFileFetch extends Thread { 7e=a D~f \qTn"1bQ 7R2)Klt SiteInfoBean siteInfoBean = null; //文件信息Bean 9vj:=,TNu long[] nStartPos; //开始位置 *r%mqAx( long[] nEndPos; //结束位置 <s7{6n') FileSplitterFetch[] fileSplitterFetch; //子线程对象 p$%h!.~99T long nFileLength; //文件长度 }.gg!V'9w boolean bFirst = true; //是否第一次取文件 ytC{E_ boolean bStop = false; //停止标志 pM7BdMp File tmpFile; //文件下载的临时信息 XWUTb\@ DataOutputStream output; //输出到文件的输出流 Jb$z(?S P`%ppkzV6 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2E1TJ.[BS public SiteFileFetch(SiteInfoBean bean) throws IOException =91'.c< { vaxg^n|v9 siteInfoBean = bean; G[^G~U\+! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); V[bc-m tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0,A?*CO if(tmpFile.exists ()) 8|tm`r`*Az { h1gb&?w5P bFirst = false; &4%J35~ read_nPos(); [qI* ] } dDuA%V0 else 6b8Klrar! { uE|[7,D7;u nStartPos = new long[bean.getNSplitter()]; -*Pt781 nEndPos = new long[bean.getNSplitter()]; eS=k 48'U } ?7p|
F^ X}=f{/\S i|O7nB@ <&Uk!1Jd } GJuD
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< SWGa%6| public void run() j`GbI0,bT { ,6bMfz //获得文件长度 Q+Fw =Xw //分割文件 ppD~xg] //实例FileSplitterFetch A X#!9-m3 //启动FileSplitterFetch线程 U`Ag|R //等待子线程返回 A-u5 try{ 2&d&$Jg if(bFirst) W.R'2R# { Rp|&1nS nFileLength = getFileSize(); Jqj6L993e if(nFileLength == -1) &; skB. { ^0
lPv!2 System.err.println("File Length is not known!"); k$ M4NF~$ } @~XlI1g$i else if(nFileLength == -2) (KMobIP^ { I7_D $a= System.err.println("File is not access!"); /
IS WC } j)DZmGg&t else =arsoCa { MB 5[Js| for(int i=0;i<nStartPos.length;i++) DQICD.X6R { KEN-G nStartPos = (long)(i*(nFileLength/nStartPos.length)); vTEkh0Ys } %Tb|Yfyr C for(int i=0;i<nEndPos.length-1;i++) #G=QL(f>/ { |*NrS<" nEndPos = nStartPos[i+1]; [L(l++.z } u_"h/)C'H nEndPos[nEndPos.length-1] = nFileLength; -YyH"f } r97[!y1gt } Y
fA\#N0;3 X&~Eo R"o,m //启动子线程 NXNon*" fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; b
. j^US^ for(int i=0;i<nStartPos.length;i++) HXHPz4 { =eoxT fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N6[^62 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .rm7Sd4K nStartPos,nEndPos,i); Kx+Bc&X Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); LD~'^+W fileSplitterFetch.start(); }gi'%e } 5;
[|k$ v // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), r3_gPK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 4Z<l>! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @<=#i nEndPos = " + nFileLength); z=_{jjs // fileSplitterFetch[nPos.length-1].start(); PI \,`^)y o#) !b:/ L,pSdeq //等待子线程结束 <xjv7`G7 //int count = 0; xm0#4GFUS //是否结束while循环 J-<B*ot+lX boolean breakWhile = false; B[B<U~I} \=V[ba:q
cgeS)C7 while(!bStop) Le
JlTWotC { f {c[_OR write_nPos(); kte.E%.PE Utility.sleep(500); :+Ax3 breakWhile = true; I=yj AJd.K'=8 -*fYR#VQQB for(int i=0;i<nStartPos.length;i++) l_-n&(N2<[ { N>Y50 if(!fileSplitterFetch.bDownOver) Z;'.pU~ { A<5`[<x$ breakWhile = false; WbWW=(N'd break; MxEAs}MDv } %=8(B.I! } 2\\3< if(breakWhile) @h$0S+?: break; [(F<|f:n ^p zxwt 0P40K //count++; ]"g >> N //if(count>4) W.D3$ // siteStop(); `A _8nW) } ,Z7Z!.TY! s [F' h-y =G F System.err.println("文件下载结束!"); 7XWBI\SW } $,,>R[; w catch(Exception e){e.printStackTrace ();} }lTZq|;A } WriN]/yD Cj 2Xl 3@`H<tP'6o //获得文件长度 <4e*3WSG public long getFileSize() kok^4VV { H"rzRd;S int nFileLength = -1; /+t[, try{ &:I
+]G/W URL url = new URL(siteInfoBean.getSSiteURL()); LZC?383' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y2$;t' httpConnection.setRequestProperty("User-Agent","NetFox"); Cm;qDvj+u @IY?DO &f<1=2dm int responseCode=httpConnection.getResponseCode(); EN)A" if(responseCode>=400) 7$'mC9 { SKpPR;=q|: processErrorCode(responseCode); J1p75c% return -2; //-2 represent access is error 7(~H77 } kTZx-7~ U%t/wq 8{<[fZyC String sHeader; [&qbc#L a950M7 :6j :9lYL2 for(int i=1;;i++) *Z]WaDw { /4
LR0`A' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); W_,;eyo //Utility.log(in.readLine()); ,ANK3n\ sHeader=httpConnection.getHeaderFieldKey(i); %L13Jsw if(sHeader!=null) XCIa2Syo { +Sd,l>8\ if(sHeader.equals("Content-Length")) G(0y|Eq { i`KZ, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); IbJ[Og^Qyu break; 5nx<,-N*BP } Az< 9hk } yD"0=\ else 2>}\XKF). break; xOL)Pjo/m } 8q?;Hg } fQ36Hd?(5 catch(IOException e){e.printStackTrace ();} <@e+-$ catch(Exception e){e.printStackTrace ();} |[37:m p + l_MB 3U~lI& Utility.log(nFileLength); J/x@$' +:,`sdv6o rFq@]t3q return nFileLength; N8XC~Dh{ } J,1osG<6x },fo+vRM u.kYp //保存下载信息(文件指针位置) G?ugMl} private void write_nPos() JOdwv4(3V { U$A7EFK' try{ Q-`{PJ(p output = new DataOutputStream(new FileOutputStream(tmpFile)); D!RE-w92X output.writeInt(nStartPos.length); (}C^_q:7d for(int i=0;i<nStartPos.length;i++) $,;S\JmWP { 7SK3 // output.writeLong(nPos); %[nR|a< output.writeLong(fileSplitterFetch.nStartPos); zvGK6qCk output.writeLong(fileSplitterFetch.nEndPos); TsX+. i' } <4Q1 2: output.close(); !b7'>b'J<1 } R#/?AD& catch(IOException e){e.printStackTrace ();} e$Bf[F#;- catch(Exception e){e.printStackTrace ();} :6W^ S/pf } $Pd|6 9si}WqAw ^RV //读取保存的下载信息(文件指针位置) _3.G\/>[K private void read_nPos() p/hvQyE { |0L=8~M(j try{ e?!L}^f6X DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); w#xeua|*I# int nCount = input.readInt(); 7<3U? ]0 nStartPos = new long[nCount]; z+k=|RMau nEndPos = new long[nCount]; ,!I?)hwOC for(int i=0;i<nStartPos.length;i++) rv}mD { 6QII&Fg nStartPos = input.readLong(); U=kx`j> nEndPos = input.readLong(); ~M
,{ _ } "]T$\PJun input.close(); \TbsoWX } +5HnZ?E\ catch(IOException e){e.printStackTrace ();} V#NG+U.B catch(Exception e){e.printStackTrace ();} m
ZtvG, } KZF0rW =naR{pI NfTCpA private void processErrorCode(int nErrorCode) hj&fQ}X { 5iQmZ[ System.err.println("Error Code : " + nErrorCode); zJ;>.0 } 6 u-$ /mn-+u`K h(@R]GUX //停止文件下载 <)O>MI'
4 public void siteStop() C,A!tj7@ { &|.hkR2k bStop = true; ]cm6 |`pz for(int i=0;i<nStartPos.length;i++) Xnv@H:$mxk fileSplitterFetch.splitterStop(); (#6AKr9K &~~aAg `KpFH.k.K } c~}={4M] } oZvA~]x9\ //负责部分文件的抓取 V@D]bV@4 **FileSplitterFetch.java Vd+td;9( */ u5w&X8x package NetFox; jzs.+dAg IKi{Xh]\ 9u,8q:I.? import java.io.*; G'f9N^w import java.net.*; <4bz/^ j8GY`f# E6Q]A~ public class FileSplitterFetch extends Thread { -<qxO T[;;9z 1 -ZJT String sURL; //File URL }zFf0.82 long nStartPos; //File Snippet Start Position Y[Q@WdE9 long nEndPos; //File Snippet End Position _1^8xFe2 int nThreadID; //Thread's ID mZ~ qG5@/F boolean bDownOver = false; //Downing is over }I]j&\ boolean bStop = false; //Stop identical kE/`n],1U FileAccessI fileAccessI = null; //File Access interface 7J9l.cM3 Hm %g_Mt DY9fF4[9a public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :{LAVMG&^ { 9!9>
?Z this.sURL = sURL; \dRzS@l this.nStartPos = nStart; QyPg
|#T2> this.nEndPos = nEnd; X8/Tl\c nThreadID = id; ]3*P:$Rq fileAccessI = new FileAccessI(sName,nStartPos);//定位 ha*X6R } ~>V-*NT8 $<B
+K 1O
|V=K public void run() |G(1[RNu { ?c!:81+\ while(nStartPos < nEndPos && !bStop) Dv&>*0B { xS'zZ%? F4Zn5&.) i+f7 try{ UVB/vqGg URL url = new URL(sURL); 2-++i:, g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); t|}O.u-&;~ httpConnection.setRequestProperty("User-Agent","NetFox"); aG%kmS&fv String sProperty = "bytes="+nStartPos+"-"; 5m4DS:& httpConnection.setRequestProperty("RANGE",sProperty); !(Krf Utility.log(sProperty); (;aB!(_ [,=d7*b(l _%Bz,C8 InputStream input = httpConnection.getInputStream(); No)
m/17y //logResponseHead(httpConnection); Sp:l;SGd WsR+Np@c ?^ZXU0IkP byte[] b = new byte[1024]; jM~Bu.7 i6 int nRead; TyF{tuF while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2i\Q@h { 17}$=#SX nStartPos += fileAccessI.write(b,0,nRead); V/PAi.GZ
//if(nThreadID == 1) Py|;kF~! [ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j{"z4Y4 } +$47v$p {`%hgR 5IW8=$k~.) Utility.log("Thread " + nThreadID + " is over!"); *8bK')W bDownOver = true; P;vxT}1 //nPos = fileAccessI.write (b,0,nRead); V<8K@/n@ } B0d%c&N${ catch(Exception e){e.printStackTrace ();} J~KX|QY.S } 8eluO ?p } %j7:tf= k=[pm5ZvT~ 0GZq`a7[ //打印回应的头信息 q"akrI38 public void logResponseHead(HttpURLConnection con) ['cz;2{:W { 4KXc~eF[M" for(int i=1;;i++) XphE loL { !:WW String header=con.getHeaderFieldKey(i); [4*1}}gW%5 if(header!=null) J8?2R^;{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); n9%]-s\Hn Utility.log(header+" : "+con.getHeaderField(header)); 5t\HJ`C1Z else u%u&F^y break; _;hf<|c } OfTfNhpK } 5RF4]$zT w(U:U-MNe ESTM$k}X
public void splitterStop() }7eh F6 { zI^]esX!2_ bStop = true; qP3q } [dB$U}SEj *6Q|}b[qcD +r]zs^' } {tw+#}T a \'Ssn(s @PI%FV z~p /* fRB5U' **FileAccess.java +m)q% I> *//文件访问(定位,写) &]F3#^!^ package NetFox; @MiH(.Dq import java.io.*; }4&/VvN Y-)xTn ${I*nh>= public class FileAccessI implements Serializable{ +bA% J0Z7l //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3Bd X RandomAccessFile oSavedFile; 8w_7O>9 long nPos; ***a2Z/( uo2'"@[e ! zL1;d public FileAccessI() throws IOException tF7hFL5f { tGjhHp8}c this("",0); NBYH;h P } x|i_P|Z k7@t{Cu0D& >Lft9e public FileAccessI(String sName,long nPos) throws IOException 8`=v. { s@8w-]" oSavedFile = new RandomAccessFile(sName,"rw"); -TO\'^][X this.nPos = nPos; w_hHfZ9E oSavedFile.seek(nPos); 3Fs5RC~a } &c>?~-!W /3!fA=+ tyh@^7 public synchronized int write(byte[] b,int nStart,int nLen) %eg+F { H,QTYXi " int n = -1; y7/F_{ try{ j$Ab>}g] oSavedFile.write(b,nStart,nLen); E{E0Z9t7& n = nLen; t)f-mQz) } S<`I
Jpkv catch(IOException e) e}hmS 1>H { 'n;OB4 e.printStackTrace (); )G~w[~ } V5i*O3a~
8|6
4R: $q$7^r@ return n; i/H+xrCK } C0jj(ku& }}|)Yq ^uBxgWIC } ? *>]")[> *.#oxcll >UDd @ /* ~PnTaAPJ **SiteInfoBean.java .,0b E */ =WIJ>#Go< package NetFox; 1v zb8. #bX9Tu0 99xEm public class SiteInfoBean { F@ Swe S35~Cp ^r6!l. private String sSiteURL; //Site's URL A@hppaP! private String sFilePath; //Saved File's Path }e2VY
private String sFileName; //Saved File's Name vS\Nd1~ ? private int nSplitter; //Count of Splited Downloading File SAYLG ZJPmR/OV_ HpZ1xT public SiteInfoBean() ziPR>iz- {//nSplitter的缺省值为5 ",6M)3{|c //default value of nSplitter is 5 #>lG7Ns|4 this("","","",5); #J (~_%Wi } JN+_|` jhu 07HX_ kQ1w5mCh public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^9Qy/Er' { =X\^J sSiteURL= sURL; &>d:R_Q] sFilePath = sPath; >NYW{(j sFileName = sName; wX >*H this.nSplitter = nSpiltter;
#$1Z k:jSbbQ I[)% , jd } mKrh[nA 7xRl9 &xRo^iV? public String getSSiteURL() Q></`QWpoB { L:XC return sSiteURL; X+UJzR90 } "&/-N[is c\a_VRN>r '5&s=M_ public void setSSiteURL(String value) .<@8gNm3 { #@<9S{F sSiteURL = value; [8tL"G6s } ^[:p|U2mA 1-lu\"H` nRyU]=-X public String getSFilePath() i&{DOI%w { k0Ol*L!p return sFilePath; 2hzsKkrA
{ } {~Rk2:gx aDO! y=?)n\f public void setSFilePath(String value) (L^]Lk
x) { S$QG.K:<! sFilePath = value; i3rH'B-I. } eek7=Z |{CfWSB7~@ 8Z(Mvq]f& public String getSFileName() *98$dQR$ { 6I@h9uIsze return sFileName; n{6G"t:^l } !pD*p)`s 0u\GO; feQ **wI public void setSFileName(String value) +v=C@2T { .l.a(_R sFileName = value; j~!X;PV3 } ~l)-wNqR4r J0@X<Lt U Q~Hy%M%R3 public int getNSplitter() tQS5hwm* { @Y1s$,=xB return nSplitter; EK4d_L]I } sBcPq SMby V4_=<W P9T}S public void setNSplitter(int nCount) 6I%5Q4Ll { e)(wss+d7P nSplitter = nCount; nDHTV!]< } oH_;4QU4y } =3L;Z[^9 =weSyZ1~ -3Hy*1A. /* 2 B **Utility.java p6;OL@\~ */ ,^C--tgZJg package NetFox; k |eBJ% YJ\Xj56gv /Njd[=B public class Utility { g*_cPU0~m VIv&ofyAR <ZNzVnVA public Utility() RS8Hf~0G { ME*LHr, >k (C N<XNTf } E"5*Ei)^3 <i&_ooX //线程睡眠 tNbN7yI public static void sleep(int nSecond) ]@phF _ {
sG
F aL try{ ee^{hQi Thread.sleep(nSecond); Z'.AA OG } ;IZwTXu !S catch(Exception e) c}2jmwq
{ T( U_ e.printStackTrace (); `~By)?cT_> } /w}u3|L$ } t:'Mh9h7u wY[+ZT //日志 L6|oyf public static void log(String sMsg) ^SF&=NpV { ]SLP}Jwy System.err.println(sMsg); toBHkiuD } &7K?w~ cWe"%I KV0]m^@x public static void log(int sMsg)
2*^j { xD~5UER System.err.println(sMsg); YwjKAyLU } J^Wa8Q;9lX } [J?aD`{#O F^];U+J <+?7H\b /* ]1#e#M]# **TestMethod.java ?iWi */ Ju1D
=b package NetFox; @~"h62=]
- j~[z2tV |}Nn!Sj>#; public class TestMethod { #."-#"0 0tT(W^ho g :&V h? public TestMethod() ?kbiMs1;u { ///xx/weblogic60b2_win.exe c7x~{V8 try{ 4R1<nZ"e~ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); vunHNHltW0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); jtW!"TOY SiteFileFetch fileFetch = new SiteFileFetch(bean); S.-TOE fileFetch.start(); '!!CeDy } !
|<Fo'U catch(Exception e){e.printStackTrace ();} kuszb~`zPY Oi8.8M gG(fQ
89U" } [\v}Ul s %j_H uxvqMgR public static void main(String[] args) +0nJ { dMv=gdY new TestMethod(); nrub*BuA } (X\@t-8 } JfLqtXF[&" 点击下载更多相关资料
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