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/* :TVo2Zm[@ **SiteFileFetch.java !- [ZQ */ z<Z0/a2'1 package NetFox; J"#6m&R_q import java.io.*; )P?0YC import java.net.*; xM{[~Kh_x ,7$&gx>2& e!=7VEB public class SiteFileFetch extends Thread { w#2apaz &%v*%{|j sc t3|H# SiteInfoBean siteInfoBean = null; //文件信息Bean -Tvnd, long[] nStartPos; //开始位置 46M=R-7= long[] nEndPos; //结束位置 em7L`, FileSplitterFetch[] fileSplitterFetch; //子线程对象 pPxgjX long nFileLength; //文件长度 ZKW1HL ]m boolean bFirst = true; //是否第一次取文件 0aq{Y7sYU boolean bStop = false; //停止标志 J+CGhk File tmpFile; //文件下载的临时信息 N9ipw r'P DataOutputStream output; //输出到文件的输出流 8-gl$h lB2F09` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I3Co public SiteFileFetch(SiteInfoBean bean) throws IOException iTevl>p! { FoE}j
siteInfoBean = bean; %cs"PS //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J3+qnT8X tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =f@71D1 if(tmpFile.exists ()) 2cu2S"r { =H: N!!: bFirst = false; A99;bf}" read_nPos(); Zk7!CJVM } ;=0-B&+v else ,aWI&ve6 { %-YWn`yEm nStartPos = new long[bean.getNSplitter()]; DI/d(oFv` nEndPos = new long[bean.getNSplitter()]; J<NpA(@^ } ZT"vVX-)G {%6
'|<`[ uih8ZmRt lhQMR(w^ } `4ga~Ch [6\O
<-? bs}SFT L public void run() Rhlm { U4Zx1ieCKH //获得文件长度 HI1|~hOb' //分割文件 /g0' +DP //实例FileSplitterFetch <bn|ni|c" //启动FileSplitterFetch线程 a^G>|+8 //等待子线程返回 .`*(#9(M9 try{ )%9:k9 if(bFirst) }.u[';q]S { gdAd7
T nFileLength = getFileSize(); .R)Ho4CE if(nFileLength == -1) jn]l!nm { WCaMPz System.err.println("File Length is not known!"); U e-AF# } FYNUap,A else if(nFileLength == -2) Dd
OK& { 8~!h8bkC System.err.println("File is not access!"); sw$JY}Q8x } %U<lS.i else a@_n>$LZL { bTx4}>=5l for(int i=0;i<nStartPos.length;i++) A\"4[PXpQ { |Eu#mN nStartPos = (long)(i*(nFileLength/nStartPos.length)); Q(WfWifu-| }
'mv|6Y for(int i=0;i<nEndPos.length-1;i++) _x-2tnIxXv { D41.$t[ nEndPos = nStartPos[i+1]; }WR@%)7ay } #p{8 nEndPos[nEndPos.length-1] = nFileLength; 1@-l@ P } ?iaO+G&| } `^g-2~ 9e;{o,r@ O|v8.3[cT //启动子线程 Nog{w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; JBV
06T_4o for(int i=0;i<nStartPos.length;i++) G]-\$>5R { # b3 14 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ieO w& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), FIJ]` nStartPos,nEndPos,i); (h&=Na~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )
[)1 fileSplitterFetch.start(); Qc Xw - } R{B5{~m>W@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), U~|)=+%O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :p1_ij]ND // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Oxi^&f||` nEndPos = " + nFileLength); AAi4}
8+\ // fileSplitterFetch[nPos.length-1].start(); gxDyCL$h3 1"l48NL L| b^~4 k; < //等待子线程结束 p%Ns
f[1> //int count = 0; So NgDFD //是否结束while循环 wG 5H^>6u> boolean breakWhile = false; [MAvU?; E0A[{UA -t*P=V|@ while(!bStop) q)"yP\ { M VE:JNm write_nPos(); #E/|WT Utility.sleep(500); 4SkCV breakWhile = true; 0sq?>$~Kc* ?;rRR48T9E 9:!V":8q for(int i=0;i<nStartPos.length;i++) >(gbUW { %zjyZ{= if(!fileSplitterFetch.bDownOver) t4zKI~cO
{ PTF|"^k+
breakWhile = false; {o%OG/!1 break; R|\kk?,u } 9KL)5_6 M } tac_MtW? if(breakWhile) o^d break; m7cG]a~a fo;^Jg. q' t" //count++; @Bsvk9} //if(count>4) J32"Ytdo< // siteStop(); RHI?_gf& } e=i9l dY?>:ce 1mv8[^pF System.err.println("文件下载结束!"); xn<x/e } w\>@>*E> catch(Exception e){e.printStackTrace ();} T#YJ5Xw } F@xKL;'N74 dsZ-|C KctbNMU]k //获得文件长度 [TmZ\t!5$ public long getFileSize() `$] ZT>& { \uOR1z int nFileLength = -1; zrA=?[ try{ `9DW} URL url = new URL(siteInfoBean.getSSiteURL()); e$-Y>Dd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "2
qivJ httpConnection.setRequestProperty("User-Agent","NetFox"); F,xFeq$/{ 239gpf]} d?[8VfAnh int responseCode=httpConnection.getResponseCode(); GS,}]c= if(responseCode>=400) Ye\&_w"
{ [58qC: processErrorCode(responseCode); qD(dAU return -2; //-2 represent access is error Mgux(5`; } fp$U%uj 2()/l9.O' Y-v6M3$ String sHeader; ^B'N\[ $btk48a 7 P\2x9T for(int i=1;;i++) N}\3UHtO { U1pwk[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?fvK<0S` //Utility.log(in.readLine()); 810uxw{\ sHeader=httpConnection.getHeaderFieldKey(i); Nf9$q| %! if(sHeader!=null) %xwtG:IKEV { j>O!|V if(sHeader.equals("Content-Length")) o=Kd9I# { KD8,a+GL nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); z#srgyLt break; %xN91j[" } ! ?GW<Rh } LE+#%>z> else 7eyx cr;z break; l\&Tw[O } . L]!* } L@~0`z:>iP catch(IOException e){e.printStackTrace ();} #D Oui] catch(Exception e){e.printStackTrace ();} M~djX} #\ jGKI|v4U( ;<s0~B#9} Utility.log(nFileLength); g$9s}\6B KiMEd373- &}b-aAt return nFileLength; g:[yA{Eh } T3/Gl6f 0t0m?rVW l\t<_p/I)^ //保存下载信息(文件指针位置) dQPW9~g8Hg private void write_nPos() HAGpM\Qa { @l&>C#K\ try{ :cE~\BS& output = new DataOutputStream(new FileOutputStream(tmpFile)); `j(-y`fo output.writeInt(nStartPos.length); ^r^) &] for(int i=0;i<nStartPos.length;i++) O`'r:W { 1y6{3AZm< // output.writeLong(nPos); 5H/D~hr& output.writeLong(fileSplitterFetch.nStartPos); 3/RNStd<L! output.writeLong(fileSplitterFetch.nEndPos); ),U>AiF] } $w
,^q+ output.close(); j%Z%_{6Ds* } S!.H _=z%p catch(IOException e){e.printStackTrace ();} <iznB8@ catch(Exception e){e.printStackTrace ();} oz?pE[[tm } W< :7z
mI3
\n 8Rd*`]@[pk //读取保存的下载信息(文件指针位置) (-hGb: private void read_nPos() Q1u/QA:z7 { yxL(mt8 try{ HpR(DG)
? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); nB#XQ8Nzx^ int nCount = input.readInt(); ]"-c?%L nStartPos = new long[nCount]; MI|anM nEndPos = new long[nCount]; S2"H E` for(int i=0;i<nStartPos.length;i++) nQ^ c{Bm: { yq\p%z$: nStartPos = input.readLong(); |eFce/ nEndPos = input.readLong(); C?7I(b: } ^Z:qlYZ input.close(); *waaM]u } H4IJLZ3G catch(IOException e){e.printStackTrace ();} U9:I"f, catch(Exception e){e.printStackTrace ();} }^n346^ } pJ3Yjm[l 9*j$U$:' [BKX$A:Y private void processErrorCode(int nErrorCode) j#YPo { (2p<I)t System.err.println("Error Code : " + nErrorCode); cP`[/5R } H+F># K}9 c$C4 \"?5CHz* //停止文件下载 Z-rHYfa4 public void siteStop() TAKvE=a; { hScC<=W bStop = true; .{
r
%C4q9 for(int i=0;i<nStartPos.length;i++) @_C?M5v fileSplitterFetch.splitterStop(); p2uZ*sY(D pn-`QB:{h 8;1,saA_9 } !t!\b9= } b[`fQv$G //负责部分文件的抓取 _!Ir|j.A **FileSplitterFetch.java ;A;FR3=) */ "vN~7% package NetFox; hYEUiQ .GOF0puiM &ub0t9R import java.io.*; @w5x;uB|%G import java.net.*; ]U)Yg 9a3mN(< }+ZZO0 public class FileSplitterFetch extends Thread { U@<]>.$ U6yZKK ud:5_* String sURL; //File URL VDy\2-b8d long nStartPos; //File Snippet Start Position 'fr~1pmx#3 long nEndPos; //File Snippet End Position t p<wMrq< int nThreadID; //Thread's ID
mPS27z( boolean bDownOver = false; //Downing is over &(i_s boolean bStop = false; //Stop identical ;{f4E)t 7 FileAccessI fileAccessI = null; //File Access interface qttJ*zu _0E KE }>< v7 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException qpXsQim$~ { 8a,pDE this.sURL = sURL; L@>$
Aw this.nStartPos = nStart; x4%1P w this.nEndPos = nEnd; [ T!0ka nThreadID = id; (hFyp}jkk fileAccessI = new FileAccessI(sName,nStartPos);//定位 $hq'9}ASOL } SVJt= M RSK5 }2 $Z[W}7{pt# public void run() )H|cri~D { c-q=Ct while(nStartPos < nEndPos && !bStop) 8D6rShx = { G"D=ozr WI}cXXUKm0 caXSt2|' try{ &$8YW]1M URL url = new URL(sURL); ~zph,bk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o GN*p_g httpConnection.setRequestProperty("User-Agent","NetFox"); m*H' Cb String sProperty = "bytes="+nStartPos+"-"; ?:+sjHzXT httpConnection.setRequestProperty("RANGE",sProperty); \<0xg[ Utility.log(sProperty); c01i!XS G7uYkJO ;?.w!|6 InputStream input = httpConnection.getInputStream(); UNJAfr P //logResponseHead(httpConnection); 1Zt>andBF \^]*T'>b ?`T-A\A= byte[] b = new byte[1024]; ^SC2k LI int nRead; q!4eVg* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 35/K9l5 { `|WEzW~ nStartPos += fileAccessI.write(b,0,nRead); p` /c&} //if(nThreadID == 1) }C!g x6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :hFKmoy# } 3:"w"0[K3 ~Y 3X* i.Z iLDs\7 Utility.log("Thread " + nThreadID + " is over!"); 20?@t.aMp bDownOver = true; pi;'! d[l% //nPos = fileAccessI.write (b,0,nRead); =:;K nS } 0I['UL^!F catch(Exception e){e.printStackTrace ();} X<mlaXwrA } k<}3_ } t+Au6/Dx? |*n
B2 ,Vfjt=6]} //打印回应的头信息 )];Bo.QA public void logResponseHead(HttpURLConnection con) FL E3LH { o8h`9_ for(int i=1;;i++) 7r o&Q% { pj#l s String header=con.getHeaderFieldKey(i); Z~1uyr( if(header!=null) uZe"M(3r$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); bZW dd6 Utility.log(header+" : "+con.getHeaderField(header)); |qz&d=> else {@ Z=b5/P break; oe<DP7e } TXo`P_SE } kJK*wq]U6 Wn-'iD+9< kwUy^"O public void splitterStop() w0^}c8%WR { SW)jDy bStop = true; qT~a`ou: } \wF-[']N W5,&*mo r1[c+Hy } #\Zr$?t|V K$I`&M( XNJ3.w:R /* Zygu/M6 **FileAccess.java 6u>]-K5 *//文件访问(定位,写) K.Tob,5` package NetFox; i
?PgYk&} import java.io.*; >!Dp'6 q~`dxq`} Z rv:uEl public class FileAccessI implements Serializable{ o 3JSh= "h-ZwL //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _p^$.\k" RandomAccessFile oSavedFile; Jq?Fi'2F% long nPos; L%jIU<?Z7 hBi/lHu' a:Nf+t public FileAccessI() throws IOException |]5`T9K@b# { "x3x$JQZy this("",0); D)tL}X$ } "!ks7:}v foUB/&Ee 0<93i public FileAccessI(String sName,long nPos) throws IOException -9Dr;2\ { :!Nx'F9a oSavedFile = new RandomAccessFile(sName,"rw"); #>6Jsnv1 this.nPos = nPos; X0Wx\xDg[ oSavedFile.seek(nPos); +ZOKfX } =Cd{bj.8 SY.ZEJcv <nTZs`$LwL public synchronized int write(byte[] b,int nStart,int nLen) zx5#eMD { |DYgc$2pN int n = -1; G=]ox*BY try{ td7Of(k' oSavedFile.write(b,nStart,nLen); &0i$Y\g n = nLen; Fw:_O2 } e07u@_'^ catch(IOException e) >gDeuye { !jvl"+_FV e.printStackTrace (); 3CH>!QOA } fN/;BT (&Rql7](8 7>= return n; 0SQrz$y } }Ogb|8 bh(}f.@
9 ?)T@qn+ } @]!9;?so 6_:I~TTX Fv*Et-8tN5 /* e_"m\e#N **SiteInfoBean.java $01csj */ 1_};!5$. package NetFox; 1tLEKSo+ --EDr>'D5P S+"Bq:u" public class SiteInfoBean { TOhWfl; mfG m>U IEfYg(c0U private String sSiteURL; //Site's URL {1qr6P," private String sFilePath; //Saved File's Path YmpaLZJ private String sFileName; //Saved File's Name JfY(};& private int nSplitter; //Count of Splited Downloading File S'\e"w Np i)R) =?Ui(?tI public SiteInfoBean() Kv2S&P|jXM {//nSplitter的缺省值为5 |]9L# //default value of nSplitter is 5 zk"8mTg this("","","",5); iCLH } TW|- 0
vZW[y5 8+J>jZ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) r6kJV4I=re { J.'%=q(Sb sSiteURL= sURL; ANNVE}, sFilePath = sPath; 9ln=f= sFileName = sName; q#@r*hl this.nSplitter = nSpiltter; t|mK5aR4 bLSc=f& ^/6P~iK' } I)yF!E & k~gOL#$ XK\3"`kd public String getSSiteURL() C BoCT3@~ { PXqG;o*Q*? return sSiteURL; jFJ}sX9] } <_ENC>NP shw"TF>?zG iPkCuLQ} public void setSSiteURL(String value) {z\K!=X/ { lZuH:AH sSiteURL = value; rwVp}H G
} reNf?7G+m [sjkm+
? % P Ex public String getSFilePath() EZN!3y| m { #]6{>n1*+w return sFilePath; yCA8/)>Gm } KGcjZx04! Sb> &m kiyc ^s public void setSFilePath(String value) Ix}6%2\ { /Q3\6DCl sFilePath = value; 0Sz[u\w } s5rD+g]E` @"MQ6u G> /s~S\dG public String getSFileName() EEnl' { /aMOZ=,q} return sFileName; aWlIq(dU } hxK;f \xbUr`WBY \hZ%NLj public void setSFileName(String value) ZZ!">AN`^ { KbtV> sFileName = value; dzBP<Xyh } &b`W<PAc?4 D4,>g )B :)D7_[i public int getNSplitter() DJ@n$G`^^ { (S?Y3l| return nSplitter; 5QLK } as!a!1 ($kw*H{Ah^ mHHlm<?] public void setNSplitter(int nCount) BkGExz { "I)zi]vk nSplitter = nCount; ,!b<SQ5M } |5tZ*$nGa } (or"5}\6- ?q9]H5\ [#q]B=JB /* -PAEJn5$O **Utility.java |Ia9bg'1U */ p/?o^_s package NetFox; 8"9&x}
tl- uT4|43<
G F{!pii5O9 public class Utility { No} U[u.O z__?k Y |Z<\k x public Utility() n)98NSVDbT { ,`Y$}"M4 "mf$E| jt on \9 } ESIP+ U`i5B;k}- //线程睡眠 +q'1P}e public static void sleep(int nSecond) xNf}f 9l { NFZ(*v1U try{ j*G: 8Lg Thread.sleep(nSecond); robg1 } 0^gY4qx[u catch(Exception e) 1wKXOy=v0 { ^]nLE]M e.printStackTrace (); 7>__ fQu } HDhISPg } hc[ K
VLpS 5tQz!M //日志 ;_e9v, public static void log(String sMsg) JEp)8{.bW8 { n jWe^ System.err.println(sMsg); o+A1-&qhN } W&*&O,c ?gl&q+mv G/<zd) public static void log(int sMsg) #BUq;5 { 7TMq#Pb System.err.println(sMsg); gCb+hQq\ } >8"Svt$ } M% \T5 DFK@/.V _TOWqV^ /* J8alqs7 **TestMethod.java + U5Q/g */ ,Gt!nm_ package NetFox; 3!{imQT oQ<[`.s 6M*z`B{hV public class TestMethod { 0% rDDB Q+T#J9Y q`'f
/CS public TestMethod() OuTV74 { ///xx/weblogic60b2_win.exe iY,C0=n5Y try{ pT]hPuC SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); j8`
B //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); "/aZ*mkjfJ SiteFileFetch fileFetch = new SiteFileFetch(bean); PN
l/}' fileFetch.start(); 0\tac/ } AygdAg'\ catch(Exception e){e.printStackTrace ();} Ayw_LCUD ]`&_!T bE
!SW2:M } q !z"YpYB SH{@yS[c! xz8e1M public static void main(String[] args) _Sr7b#)o { iWf+wC| new TestMethod(); G&g;ROgY } 0+FPAqX } .n]"vpWm[ 点击下载更多相关资料
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