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/* 6^Q/D7U;s **SiteFileFetch.java 1Z$` }a */ jG E=7 package NetFox; {\P`-'C import java.io.*; %x]8^vze import java.net.*; h{5K9$9= h,!#YG@> f6*6 *= public class SiteFileFetch extends Thread { HtN!Hgpwg K8R}2K-Y !Z}d^$ SiteInfoBean siteInfoBean = null; //文件信息Bean CI}zu;4| long[] nStartPos; //开始位置 4H]~ ]?F& long[] nEndPos; //结束位置 lG>,&( FileSplitterFetch[] fileSplitterFetch; //子线程对象 bzC|aUGM long nFileLength; //文件长度 'LyEdlC] boolean bFirst = true; //是否第一次取文件 tx9;8K3 boolean bStop = false; //停止标志 X9S`#N File tmpFile; //文件下载的临时信息 2d:5~fEJp DataOutputStream output; //输出到文件的输出流 cU[^[;4J< X%sMna) //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6!;eJYj, public SiteFileFetch(SiteInfoBean bean) throws IOException *URBx"5XZ { `p'(:W3a siteInfoBean = bean; tW8&:L,m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); lR8Lfa*/7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jI;iTKjB( if(tmpFile.exists ()) Z+%w|Sx { dln1JZ! bFirst = false; h8)m2KrZ!. read_nPos(); GI
; } ALO0yc else })#SjFq<V { iL6Yk @ nStartPos = new long[bean.getNSplitter()]; ,P.yl~'Al nEndPos = new long[bean.getNSplitter()]; $-Yq?: } q-lejVS(g ?r}'0dW Ob~7r*q bZKlQ<sI } 6]D%|R,Q#} h@H8oZ[ IHs^t/;Iv public void run() F^/b!)4X { f7y3BWOi] //获得文件长度 L#>^R //分割文件 b rpsZU //实例FileSplitterFetch ;&2f { //启动FileSplitterFetch线程 &$V&gAN //等待子线程返回 ;J&p17~T9 try{ #=81`u if(bFirst) EG&97lb { )/{zTg8$?/ nFileLength = getFileSize(); =U- w!uW if(nFileLength == -1) zcrM3`Zh { #JD:i% System.err.println("File Length is not known!"); oj'a%mx } =mQdM]A)2 else if(nFileLength == -2) )%6h9xyXt { ~#SLb=K System.err.println("File is not access!"); 7/># yR } GX\6J]x=^2 else 8rEUZk { Mcfqo0T- for(int i=0;i<nStartPos.length;i++) !C3ozZ< { W-8U~*/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0hB9D{`,{ } +WTO_J7 for(int i=0;i<nEndPos.length-1;i++) qH9bo-6 { )a=58r07 nEndPos = nStartPos[i+1]; qZwqnH } t"Tv(W?_ nEndPos[nEndPos.length-1] = nFileLength; t8:QK9|1 } m~;}8ObQE } '&+5L. "WfVZBWG$ 5%#V>|@e# //启动子线程 nPRv.h fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; xJ(}?0h-X for(int i=0;i<nStartPos.length;i++) gbvMS*KQz { rFLm!J] fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wnr<# =,I' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DN 0`vl{* nStartPos,nEndPos,i); \|f3\4;! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,l )7]p*X fileSplitterFetch.start(); CEXD0+\q } ar[I|
Q_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Tfow_t}\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Pz77\DpFi // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~\]lMsk+ nEndPos = " + nFileLength); Ss$/Bh>hN // fileSplitterFetch[nPos.length-1].start(); M7PGs-l D~T;z pS ygo4. //等待子线程结束
A}l+BIt //int count = 0; ui .riD[,O //是否结束while循环 Q| _e= boolean breakWhile = false; ,u@Vi0 ]Dd}^khv
ur@"wcl"V while(!bStop) AbA_s I<; { !V~,aoKTj write_nPos(); g)`;m%DG6 Utility.sleep(500); T?e(m breakWhile = true; 2qgm(jo *y y{k65dk- {^V9?^?d ( for(int i=0;i<nStartPos.length;i++) VNT*@^O_= { vAt]N)R if(!fileSplitterFetch.bDownOver) 'Z}3XVZEN { QJ^'Uyfdn breakWhile = false; my+2@ln break; f j:q>}V } ZFFKv } O =gv2e if(breakWhile) ]*v[6 + break; o$rA;^2X Y=$PsDh! DOB#PI[/ //count++; uN*Ynf(:- //if(count>4) ;_iDiLC; // siteStop(); ;k fl5 } 6+LBs.vl} E'iN==p_: S9kA69O System.err.println("文件下载结束!"); N?j#=b+D } lK"m|Z catch(Exception e){e.printStackTrace ();} $VNj0i. Pr } yR$ld.[uf jzb%?8ZJ |6o!]~&e$1 //获得文件长度 L )53o! public long getFileSize() (kmrWx=
$ { !4vepa}Y int nFileLength = -1; n]x%xnt try{ 8~j1 URL url = new URL(siteInfoBean.getSSiteURL()); `)TuZP_) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c_Lcsn httpConnection.setRequestProperty("User-Agent","NetFox"); !e?2
x@J ]y\Wc0q _L%
=Q ulu int responseCode=httpConnection.getResponseCode(); pZ)N,O3 if(responseCode>=400) Rc2JgV { (TTS-( processErrorCode(responseCode); iPCDxDLN3V return -2; //-2 represent access is error K:L_y1!T } 5MHcgzyp #D ]P3 ^|UD&6 dx String sHeader; KbGz3O'u Ux-i iH#s t->I# t7 for(int i=1;;i++) :ZsAWe{%,J { sL4j@Lt //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); xRbtiFk9H //Utility.log(in.readLine()); *&doI%q sHeader=httpConnection.getHeaderFieldKey(i); rr^?9M*{V if(sHeader!=null) _~.S~;o!b { ]Ei*I} if(sHeader.equals("Content-Length")) z2U^z*n{ { MRN=-|fV^ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :-tMH02c break; .r~M7 I } k@|Go)~ } ESmWK;7b else KXT9Wt= break; -LU%z' } C17$qdV/ } 4vJg"*? catch(IOException e){e.printStackTrace ();} C+%6N@ catch(Exception e){e.printStackTrace ();} PrhGp
_5 _^@ >I8ix b_w(F_0 Utility.log(nFileLength); LhCwZ1 o0 |T<_ tLzb*U8'1w return nFileLength; E RjMe'q4 } k"F \4M 2#Du5d NCivh&HR //保存下载信息(文件指针位置) dZ|x `bIgs private void write_nPos() $&X-ay o { YB]{gm2 try{ S+bpWA output = new DataOutputStream(new FileOutputStream(tmpFile)); 8k )i-&R output.writeInt(nStartPos.length); +'9E4Lpx for(int i=0;i<nStartPos.length;i++) agd^ga3 { i\dd // output.writeLong(nPos); ']U<R=5T$ output.writeLong(fileSplitterFetch.nStartPos); yrG=2{I output.writeLong(fileSplitterFetch.nEndPos); S*V!t= } q,T4-
E output.close(); 6PT"9vR`) } I~Q
G catch(IOException e){e.printStackTrace ();}
<.=-9O6 catch(Exception e){e.printStackTrace ();}
bKt4 } I9L7,~s ~oz??SX 3c+ps;nh //读取保存的下载信息(文件指针位置) Ya;y@44 private void read_nPos() IG90mpLX { 9`td_qh try{ R!rj:f!> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~EM(*k._ int nCount = input.readInt(); &AnWMFo nStartPos = new long[nCount]; p^)w$UL}} nEndPos = new long[nCount]; 'fPDODE for(int i=0;i<nStartPos.length;i++) u] Z;Q_= { 7O,!67+^~ nStartPos = input.readLong(); e.WKf,e"X nEndPos = input.readLong(); uxlrJ1~M } v}TFM input.close(); {gb` %J } %5!K?,z% catch(IOException e){e.printStackTrace ();} dWP<,Z> catch(Exception e){e.printStackTrace ();} R$bDj>8 } SBg|V 20/P:; <>H^:iqn private void processErrorCode(int nErrorCode) U+,RP$r@ { ,olP} System.err.println("Error Code : " + nErrorCode); yof8L WXx } -I[K IeF NqM=Nu\ "V`5 $ur //停止文件下载 nd }Z[) public void siteStop() `L%<3/hF { _R}yZ=di bStop = true; Lk.tEuj=82 for(int i=0;i<nStartPos.length;i++) QzxEkTc; fileSplitterFetch.splitterStop(); ?2,{+d | &qP0-x) bnZ H } nP_)PDTFp } ART0o7B //负责部分文件的抓取 BS3{TGn **FileSplitterFetch.java y@r g_Paq */ 6+4SMf3 package NetFox; <c$rfjM+JU iKu4s #,h0K import java.io.*; W3jwc{lj import java.net.*; c7D{^$L9v 1#9PE(!2 3mhjwgP<nn public class FileSplitterFetch extends Thread { i,wZNX G5ShheZd u82 (`+B String sURL; //File URL J,J6bfR/ long nStartPos; //File Snippet Start Position CA5T3J@vAQ long nEndPos; //File Snippet End Position a n0n8l int nThreadID; //Thread's ID $HCgawQ boolean bDownOver = false; //Downing is over *U-:2uf boolean bStop = false; //Stop identical T+oOlug FileAccessI fileAccessI = null; //File Access interface B!U;a=ia 5A+@xhRf *T~b
ox public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1024L; { e*Y<m\* this.sURL = sURL; ^!z(IE' this.nStartPos = nStart; MT6"b this.nEndPos = nEnd; -Jt36|O nThreadID = id; Z!3R fileAccessI = new FileAccessI(sName,nStartPos);//定位 8nwps(3 } r7FJqd TfHL'u9B 2R W~jn" public void run() ^SK!?M { *c
9S. while(nStartPos < nEndPos && !bStop) /vC!__K9: { }X. Fm'` @^/aS;B$> ^7yaMB! try{ Eu<f URL url = new URL(sURL); - ,?LS w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $%4<q0- httpConnection.setRequestProperty("User-Agent","NetFox"); R{ udV String sProperty = "bytes="+nStartPos+"-"; Tv6y+l httpConnection.setRequestProperty("RANGE",sProperty); 9bhubx\^/ Utility.log(sProperty); =~5N/! 5H1N]v+ _l+C0lQl= InputStream input = httpConnection.getInputStream(); tEt46]{ //logResponseHead(httpConnection); f8ZuG !U U8-OQ:2. d2TIG<6/ byte[] b = new byte[1024]; w@Asz9Lq% int nRead; Z}{]/=h while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Xppv { Uf
MQ?(, nStartPos += fileAccessI.write(b,0,nRead); qoZ)"M //if(nThreadID == 1) ,.h@tN<C // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EwmNgmYq } I9m9`4BK }9glr]= jGT|Xo>t Utility.log("Thread " + nThreadID + " is over!"); hA;Ai:8 bDownOver = true; c,O;B_}M] //nPos = fileAccessI.write (b,0,nRead); +TX4," } pjl>ZoOM catch(Exception e){e.printStackTrace ();} e7b MK<:r } uUV"86B_ } , &n"# XE&h&v=> 9Ofls9]U //打印回应的头信息 aqWlX0+ public void logResponseHead(HttpURLConnection con) A3*(c3 { NCY2^ for(int i=1;;i++) hn\d{HP { h-RhmQA=Iz String header=con.getHeaderFieldKey(i); '$eJATtC if(header!=null) {> 8?6m- //responseHeaders.put(header,httpConnection.getHeaderField(header)); }!?RB v'W Utility.log(header+" : "+con.getHeaderField(header)); c{ +bY.J else 8vtembna4 break; ,LP^v'[V7 } .<Jv= } y?P`vHf pw5{=bD KV8<'g +2? public void splitterStop() qj `C6_? { |)C*i bStop = true; $rTb'8 } 8Lgm50bs S4?WR+:h jVZ<i}h0B } Pf<yLT] |i#06jIq aC%Q.+-t
/* Jgg< u# **FileAccess.java l5~O}`gfh *//文件访问(定位,写) mlCg&fnDB package NetFox; ~MXhp5PI import java.io.*; bo(w$&
VW BFg&@7.X WUo\jm[yr public class FileAccessI implements Serializable{ `34{/}w /HS"{@Z"h //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0FY-e~xr RandomAccessFile oSavedFile; &%GAPs% long nPos; mwyB~,[d+W A_WaRYG F3]VSI6^E, public FileAccessI() throws IOException Lq1?Y
{ K#AexA this("",0); &:IcwD& } 1r_V$o$ ;ISe@yR; k<CbI
V public FileAccessI(String sName,long nPos) throws IOException mF|KjX~s { )7[#Ti oSavedFile = new RandomAccessFile(sName,"rw"); u"m(a:jQ this.nPos = nPos; ^Il*`&+?P oSavedFile.seek(nPos); rf%VSxD9 } p\F%Nj, p!=O>b_f 7S&$M-k public synchronized int write(byte[] b,int nStart,int nLen) 6>)nkD32g { B f]Bi~w< int n = -1; "P54|XIJ\ try{ ?FjnG_Uz`D oSavedFile.write(b,nStart,nLen); Wz"H.hf n = nLen; Kop(+]Q&n } h3&|yS| catch(IOException e) Crg'AB? { ?w'86^_z e.printStackTrace (); xy4+
[u } Hk@Gkx_ v3FdlE AO]cnhC return n; @2a!T03 } %2\tly!{ % z7gX@@T ;b~\[ } '6WS<@%} t|i<}2 noL9@It0 /* M@<9/xPS **SiteInfoBean.java f,Dic%$q */ X(X[v] package NetFox; ,Kl?-W@ X-kOp9/. qIQRl1Tw;V public class SiteInfoBean { h~](9 es Rz|@BxB>n gGUKB2) private String sSiteURL; //Site's URL g#^MO]pY private String sFilePath; //Saved File's Path Iz#4!E|< private String sFileName; //Saved File's Name .(.< private int nSplitter; //Count of Splited Downloading File !|i #g$ 3NDddrL9 ^]D1': public SiteInfoBean() MuQ)F-GSUu {//nSplitter的缺省值为5 _8
|X820 //default value of nSplitter is 5 i,a"5DR8 this("","","",5); Iia.`"S } ?6&8-zt1? F]UH\1 :S_]!'H public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) &JqaIJh
{ O>1Cx4s5 sSiteURL= sURL; J-,ocO sFilePath = sPath; i2c|_B sFileName = sName; ^Y%_{
this.nSplitter = nSpiltter; ,!^5w,P: |g)>6+?]W F]?] |nZZ } =gM@[2 BLO ]78
?z&%VU" public String getSSiteURL() 7[1|(6$ { iW>^'W# return sSiteURL; %kV7 <:y } , >S7c ->{-yh]jv #0[^jJ3J public void setSSiteURL(String value) E'DHO2
Y { |?2fq&2 sSiteURL = value; 7g(Z@ } (BeJ,K7 qrw *|dK1'Xr public String getSFilePath()
Pap6JR{7 { 2a48(~<_ return sFilePath; U|%}B( } Z9+fTT H4AT>}ri tLa%8@;'$ public void setSFilePath(String value) |oXd4 { ZDbe]9#Xh sFilePath = value; Q]/%Y[%| } QR'# ]k;>% w"s@q$}]8M FZj>N( public String getSFileName() k-=LD { o?hr>b return sFileName; p ZTrh&I] } >a<1J(c cS9jGD92 @|DQZt public void setSFileName(String value) T TN!$?G3 { 9"]#.A^Q* sFileName = value; ucx02^uA } e@W+ehx" m)Kg6/MV. x'I!f? / & public int getNSplitter() </`\3t { ?}4,s7PR return nSplitter; ~s'tr&+ } kt978qfk W
H/.h$ 7<]
EH:9 public void setNSplitter(int nCount) p|ink): { Pa{ nSplitter = nCount; V9BW@G@9 } z m$Sw0#( } Wq1 jTIQ MkPQ@so JN|6+.GG /* 1d<Uwb> **Utility.java *b.
> */ nJ2x;';lA package NetFox; '6 F-% =x\`yxsG 7*{f*({ public class Utility { QH9t |l l\*9rs:! @5S' 5)4pB public Utility() Q7$o&N{ { SscB&{f /D3{EjUE= zTw"5N } _y^r== 5o dT\>Sn //线程睡眠 2H)4}5H public static void sleep(int nSecond) 7PX`kI { ,
,{UGe3 try{ 1
&9|~">{C Thread.sleep(nSecond); 6`e7|ilh6 } Z)#UCoK!c catch(Exception e) a,c!#iyl3 { 9_?xAJ e.printStackTrace (); "+ou!YK+ } ^Fco'nlM } 0- )K_JV
E=p+z"Ui //日志 Y"GNJtsL " public static void log(String sMsg) %'=*utOxy { zXn-E System.err.println(sMsg); PC#^L$cg} } #_wq#rF :pqUUZ6x& ,KW
Q
6 public static void log(int sMsg) 9qB0F_xl { q*l4h u%3 System.err.println(sMsg); S%i^`_=Q } ZNX38<3h } l4oyF|oJTH |1~n<=`Z 'p&,'+x /* qUkMNo3 **TestMethod.java VI&x1C */ FvxM package NetFox; $Iwvecn?I _F;v3|`D@< 'BjTo*TB]Z public class TestMethod { ,twx4r^ esqmj#G Fz%;_%j public TestMethod() /*mF:40M; { ///xx/weblogic60b2_win.exe hw^&{x try{ uw}Rr7q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); I+8n;I)]X //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); O,Q.- SiteFileFetch fileFetch = new SiteFileFetch(bean); hJ}i+[~be fileFetch.start(); Rm} ym9 } z~
cW, catch(Exception e){e.printStackTrace ();} N T`S)P*? 'u7-Qetj gsk?
!D } -Uwxmy + J?QS7#!% &0F' Ca public static void main(String[] args) `@/)S^jBau { HeRi67 new TestMethod(); L=r*bq } *VZ|Idp } cuhp4!! 点击下载更多相关资料
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