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/* 8y-e+ **SiteFileFetch.java +GRxHuW, */ K3a>^g package NetFox; *Ro8W-+ import java.io.*; qw9e)
`3$ import java.net.*; ( P v!nm
&" 6{cybD`Ef& public class SiteFileFetch extends Thread { Bjurmo X@i+&Nv"< -[G/2F' SiteInfoBean siteInfoBean = null; //文件信息Bean [[#xES21F long[] nStartPos; //开始位置 GTT5<diw long[] nEndPos; //结束位置 m}; ~JMo] FileSplitterFetch[] fileSplitterFetch; //子线程对象 Fsnw3/Nr long nFileLength; //文件长度 3s3a> boolean bFirst = true; //是否第一次取文件 58M'r{8_ boolean bStop = false; //停止标志 ] dW%g? File tmpFile; //文件下载的临时信息 RmcYaj^= DataOutputStream output; //输出到文件的输出流 9vB9k@9 sx<}
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H4P\hOK7r public SiteFileFetch(SiteInfoBean bean) throws IOException '~ jy { hVQ7'@ siteInfoBean = bean; 9m%7dsv //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ju8',ZC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &gY;`*< if(tmpFile.exists ()) THrc
H { \a{Aa bFirst = false; ?y+\v'3v read_nPos(); 9m<wcZ } c2tEz&=G else ~r(g|?}P { $I?=.:<+ nStartPos = new long[bean.getNSplitter()]; V`WI"HO+ nEndPos = new long[bean.getNSplitter()]; gn-=##fT:i } 43UJ#rF 9itdRa== .d<~a1k -0=}|$H. } FCsyKdM c@0l-R{q ek Y? public void run() nEjo, { aL_;`@4 //获得文件长度 3MS3O.0]/ //分割文件 j<.
<S { //实例FileSplitterFetch 7AZ5%o //启动FileSplitterFetch线程 eyI-s9#t //等待子线程返回 &xPOp$Sx~ try{ `XQx$I if(bFirst) A5 &>!y { e["Z!D_H nFileLength = getFileSize(); GE/IaLo if(nFileLength == -1) jUV#HT { $bF`PGR_ System.err.println("File Length is not known!"); YHwVj?6W } 5#9`ROT9 else if(nFileLength == -2) o+)m}'T8 { VZ9e~){xA System.err.println("File is not access!"); )?=
kb } ZwY`x') else mSVX4XW< { `<]P"G for(int i=0;i<nStartPos.length;i++) DzX6U[= { v.~Nv@+kR nStartPos = (long)(i*(nFileLength/nStartPos.length)); 20SF<V } D@/9+]-, for(int i=0;i<nEndPos.length-1;i++) E
6>1Fm8%V { LH?gJ8` nEndPos = nStartPos[i+1]; oT9XJwqnv } MY0[Oq cm= nEndPos[nEndPos.length-1] = nFileLength; +oxqS&$L } FvtM~[Q } z9OMC$,V K-g=td/@ =CD:.FG. //启动子线程 A;/Xt fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; fzPgX for(int i=0;i<nStartPos.length;i++) K284R=j -& { H4K(SGx fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), m \R@.jkZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (o6A?37i nStartPos,nEndPos,i); _BeX7 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gn;nS{A fileSplitterFetch.start(); f"}0j|Gg } ;I0yQlx|U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a8lo!e9q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ]ci|$@V // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 0*]<RM nEndPos = " + nFileLength); <9MQ // fileSplitterFetch[nPos.length-1].start(); n]6w)wE( gvwCoCbb 9e :d2 //等待子线程结束 MO(5-R` //int count = 0; ;1(qGy4 //是否结束while循环 D%5 {A= boolean breakWhile = false; YA/H;707l W+-f ` mtHi9).,y| while(!bStop) 0zq\ j { =:0IHyB#0 write_nPos(); ej??j<] Utility.sleep(500); G%W03c breakWhile = true; CO6XIgTe zL[U; @N:3`[oB for(int i=0;i<nStartPos.length;i++) m8j#{[NE {
:jN;l if(!fileSplitterFetch.bDownOver) G41$oalQ1 { G1n>@Y'j'' breakWhile = false; g'l7Jr3 break; Q%b46" } .bY1N5=sz } +MZ2e^\F if(breakWhile) `zvT5=*-# break; u.xA}yVS U%SNROj O.m.]%URW //count++; k%bTs+]* //if(count>4) (HP={MrV // siteStop(); Ug[F3J|Mu } p_kTLNZd9 9BgQoK@ rqG6Ll`=+ System.err.println("文件下载结束!"); EzY
scX.[ } fh5^Gd~ catch(Exception e){e.printStackTrace ();}
s*A|9uf5 } jak|LOp h^3Vd K, E`Zh\u) //获得文件长度 5E!|on public long getFileSize() a6K$omu { &`9bGO int nFileLength = -1; C J}4V!;| try{ 9ixnf=$Jp URL url = new URL(siteInfoBean.getSSiteURL()); G#=b6DB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S3[oA& httpConnection.setRequestProperty("User-Agent","NetFox"); L:]; [xa% hF?\K^tF Q0oDl8~ int responseCode=httpConnection.getResponseCode(); ZBh@%A if(responseCode>=400) 'XjHB!!hU { J1wGK|F~ processErrorCode(responseCode); %>QSeX return -2; //-2 represent access is error e[Ul"pMvS` } l=.InSuLT DyV[+P (j\UoKLRt String sHeader; bgx5{!A
_M[[o5{ (>/Dw|,m for(int i=1;;i++) r;s3(@[,@ { ~o\]K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); WW
Kr & ) //Utility.log(in.readLine()); "Mu$3w sHeader=httpConnection.getHeaderFieldKey(i); .cnw?EI if(sHeader!=null) jq]\oY8y { ]{ l
O if(sHeader.equals("Content-Length")) ;Q%19f3,6 { ckkM)|kK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pRfHbPV? break; Wn)A/Z ^r } .m
% x-i } N_~Wu else v,O&UrZ break; 4iB)oR } 3_['[}
} a>e
1jM[ catch(IOException e){e.printStackTrace ();} 2LK*Cv[ catch(Exception e){e.printStackTrace ();} jZgnt{ DL/*t.)"et W!Os ci Utility.log(nFileLength); kO O~%|1CP SX<>6vH& N,'qMoNf return nFileLength; GVPEene } 7*W$GCd8 5EZr"[8M Pxuz { //保存下载信息(文件指针位置) pPqbD}p private void write_nPos() hB1 iSm { A-NC,3 try{ \y+F!;IxL output = new DataOutputStream(new FileOutputStream(tmpFile)); ~<Qxw>S# output.writeInt(nStartPos.length); EwJn1Mvq for(int i=0;i<nStartPos.length;i++) qQ\hUii { }z%/6`7)| // output.writeLong(nPos); CMB$RLf output.writeLong(fileSplitterFetch.nStartPos); hQrsZv:Q
output.writeLong(fileSplitterFetch.nEndPos); 6j.(l4} } MkIO0&0O output.close(); 2H0q\zZ } "VhrsVT catch(IOException e){e.printStackTrace ();} 9n2%7dLQ* catch(Exception e){e.printStackTrace ();} %.} } Z)>a6s$ih< q+=@kXs>+ #SOj4W //读取保存的下载信息(文件指针位置) bSKV|z/x private void read_nPos() M;@03 x W { ^C#bW<T try{ *fyEw\`a DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); dEl3?~ int nCount = input.readInt(); )HiTYV)]' nStartPos = new long[nCount]; nWg)zj: nEndPos = new long[nCount]; GeR-k9 for(int i=0;i<nStartPos.length;i++) 9!<3qx/ { :'Kx?Es nStartPos = input.readLong(); mr\L q~*c nEndPos = input.readLong(); F973U } <qZ+U4@I) input.close(); "U~@o4u; } <{~UKi catch(IOException e){e.printStackTrace ();} ;&:Et catch(Exception e){e.printStackTrace ();} 246!\zf } mLdyt-1 hndRgCo k:yu2dQh private void processErrorCode(int nErrorCode) S~`AnX3! { mAERZ<I System.err.println("Error Code : " + nErrorCode); T[II;[EiE } :9< r(22 <JuJ`t Tm,L?Jh //停止文件下载 Q>Q}/{8! public void siteStop() "uNxKLDB { i2c<q0u bStop = true; 8?R_O}U for(int i=0;i<nStartPos.length;i++) V&nJT~k fileSplitterFetch.splitterStop(); HBYpjxh ho=]'MS| {:j!@w 3 } d|HM } \d`Sz
* //负责部分文件的抓取 ,3[<C)'[ **FileSplitterFetch.java X+BSneu */ y6yseR! package NetFox; $+N^ s^ Lu5.$b 1F8EL)9 import java.io.*; j ZafwBi import java.net.*; 7l
EwQ YA8~O5 =&xoyF public class FileSplitterFetch extends Thread { <08 V- Kt0Tuj@CY <;"=ah7A String sURL; //File URL cC]1D*Bn long nStartPos; //File Snippet Start Position LxDhthZi_ long nEndPos; //File Snippet End Position %P6!vx:&^b int nThreadID; //Thread's ID N*-Z Jv boolean bDownOver = false; //Downing is over _ h-X-s Y boolean bStop = false; //Stop identical HK.J/Zr FileAccessI fileAccessI = null; //File Access interface H!=BjU1Pmg jg/<"/E .k(_j.v public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException md
s\~l73 { !d)i6W? this.sURL = sURL; ?5gpk1 this.nStartPos = nStart; q,Q|Uvpk this.nEndPos = nEnd; h}_q nThreadID = id; {<n)zLy fileAccessI = new FileAccessI(sName,nStartPos);//定位 m@?e
<$ } Z}f_\d' fe/6JV
e8v=n@0 public void run() SW,Po>Y { a^,RbV/ while(nStartPos < nEndPos && !bStop) M*uG`Eo& { hgltD8, Puh&F< B ?Ea"%z*c5 try{ rpWy 6oD URL url = new URL(sURL); #+\G-
=- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9mm(?O~'p httpConnection.setRequestProperty("User-Agent","NetFox"); /ep~/#Ia String sProperty = "bytes="+nStartPos+"-"; ?8/h3xV; httpConnection.setRequestProperty("RANGE",sProperty); ]vErF=[U, Utility.log(sProperty); ';F][x 5j 1>{(dd?L ) P])0Y- InputStream input = httpConnection.getInputStream(); {D#`+uw //logResponseHead(httpConnection); xx8na8 (v}: YJ$
=`lIM byte[] b = new byte[1024]; kRPg^Fw"Vw int nRead; 0rUf'S
?K while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @9a=D<'> { mws.) nStartPos += fileAccessI.write(b,0,nRead); A@r,A?( //if(nThreadID == 1) G.T1rUh= // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !HYqM(|{. } cGKk2'v? 4N&}hOM'S ?CDq^)T[ Utility.log("Thread " + nThreadID + " is over!"); q4oZJ -` bDownOver = true; ,,gYU_V //nPos = fileAccessI.write (b,0,nRead); e+TNG &_ } N5DS-gv catch(Exception e){e.printStackTrace ();} b.&YUg[# } |zKcL3* } F^-4Pyq@ jK53-tF~I ;*p}~#2 //打印回应的头信息 Q{60^vg public void logResponseHead(HttpURLConnection con) 7j8_O@_ { `R RORzXoS for(int i=1;;i++) P9vROzXK { [G*mQ@G9 String header=con.getHeaderFieldKey(i); ;U&VPIX$ if(header!=null) Z)%p,DiNM //responseHeaders.put(header,httpConnection.getHeaderField(header)); e`^j_VnEH Utility.log(header+" : "+con.getHeaderField(header)); |~Iw else AP%h!b5v break; ";]m]PRAam } 9`AQsZ2 } U^D7T|P$V b8&9pLl , fn=%tiUk public void splitterStop() }=gGs { <*P1Sd. bStop = true; O/Vue } g,nE iL XJ9>a-{ 2Z~ofrj } gN%R-e0 `Ec+i MZ'HMYed /* C'ZU .Y
**FileAccess.java [aC(Ga} *//文件访问(定位,写) }- Sr@bE package NetFox; RiklwR#~r/ import java.io.*; \N30SG?o DNPK1e3a{ <3KrhhH public class FileAccessI implements Serializable{ ;<\*(rUe @Klj!2cv$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 trLs4o, RandomAccessFile oSavedFile; N<x5:f#+ long nPos; dq2v[?*R c1[;a> SW7%SX,xM public FileAccessI() throws IOException 6c :$[owC { ?9:\1)] this("",0); ?jbam!A } W2RS G~| a$
}^z UWHC]V? public FileAccessI(String sName,long nPos) throws IOException Hg4Ut/0 { @)B_e*6>' oSavedFile = new RandomAccessFile(sName,"rw"); Z5Cv$bUc this.nPos = nPos; W3b\LnUa oSavedFile.seek(nPos); ~X/T6(n$ } [>E0(S] IWkBq]Y })B)-8 public synchronized int write(byte[] b,int nStart,int nLen) ^:BRbp37i { \MU4"sXw int n = -1; PA E)3 try{ &N EzKf oSavedFile.write(b,nStart,nLen); JsV#: n = nLen; S<TfvQ\,"@ } 4?Io@[7A) catch(IOException e) (&S v$L@ { ="`y<J P e.printStackTrace (); 0*q:p`OLw* } UxW~yk bWqGypq4 QO8/?^d return n;
[7bY( } W6pS.} jV(ISD B~^\jRd" } |l9AgwDg %UmE=V bnlL-]]9z /* R~`Y6>o~9: **SiteInfoBean.java gVGq */ QwhPN'U package NetFox; ;BqX=X+# E$cr3 t7Xy +wmfl:\^{H public class SiteInfoBean { >,DR{A2hSB 7
ir T6O<. }5~;jN=k private String sSiteURL; //Site's URL L2 I/h`n" private String sFilePath; //Saved File's Path G
5)?! private String sFileName; //Saved File's Name 6c2fqAF>i private int nSplitter; //Count of Splited Downloading File F?UL0Q|u v \1tce`+ nP}/#Wy public SiteInfoBean() |aZ^K\yI F {//nSplitter的缺省值为5 /fX]Yu //default value of nSplitter is 5 $1axZ~8sS this("","","",5); O
@w= } H:|yu <a'j8pw9i 2]@U$E='s public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z
>pq<}R6 { U9JqZ! sSiteURL= sURL; m_pK'jc sFilePath = sPath; @FQ@*XD sFileName = sName; ;>PV]0bOm> this.nSplitter = nSpiltter; -/h$Yb , 7}Ri ]|-y[iu } @gZ%>qe Y$(G)Fs w'UP#vT5& public String getSSiteURL() 7|{QAv { }\1V;T return sSiteURL; 4-m}W;igu } ddw!FH2W
(
"dA"N$ &oT]ycz% public void setSSiteURL(String value) tvd/Y|bV= { *bR _
C"- sSiteURL = value; FCg,p2 } W7.]V)$wM aUd633 sUg7 public String getSFilePath() 2hquE_1S[w { @.%ll n return sFilePath; W] RxRdY6[ } d@C93VYp _mcD*V 9;:Lf public void setSFilePath(String value) xEbcF+@ { wt-)5f'{ sFilePath = value; U2G\GU1 X } T'w=v-(J oqG
0 @@ <}|+2f233+ public String getSFileName() u\6:Txqq { v=|ahsYC return sFileName; IuRKj8J)o } XrYz[h*)! 6}[W%S]8 gPDc6{/C< public void setSFileName(String value) ;0ake%v] { 'GAjx{gM sFileName = value; ,KZ_#9[> } @*F
NWT6 0'a.Ypf {AJspLcG public int getNSplitter() L>cTI2NB. { x H\5T! return nSplitter; \vKMNk;kz } =T9QmEBm $LKniK mhh8<BI public void setNSplitter(int nCount) 92XzbbLp { uQrD}%GI nSplitter = nCount; P.LMu } nd-y`@z } %|4Nmf$:Og `NrxoU= ]Rz]"JZ\S /* $dq
R]' **Utility.java e3&R3{ */ Rs7=v2>I package NetFox; &d=j_9 YMC*<wXN |]^OX$d public class Utility { F?TAyD* 5_{C \S`T @99@do|C public Utility() 1)H+iN|im/ { {i3]3V"Xp `5Q0U%`W /z`LB } zuXJf+] UP^{'eh //线程睡眠 }~yhkt5K public static void sleep(int nSecond) _z~|*7@ { Kh}#At^C8e try{ ,SH))%Cyt Thread.sleep(nSecond); c:M~!CXO } (m25ZhW catch(Exception e) d_]zX;_ { b<NI6z8\ e.printStackTrace (); 3`$- } g7rn|<6FI } DhYQ>Gv8U `VwZDU~6 //日志 i_Ab0vye public static void log(String sMsg) w>J|416 { ):31!IC System.err.println(sMsg); b+9M? k" } )u`q41! FTsvPLIv" EE=!Y NP] public static void log(int sMsg) JT#jJ/^ { {rBS52,Z# System.err.println(sMsg); p~6/ } { owK~ } fKb8)PDP Z`Rrv$M! Nyip]VwMJ /* uPQ:}zL2 **TestMethod.java ^giseWR( */ '1_CMr package NetFox; $OldHe[p gDa}8!+i =`Pgo5A public class TestMethod { sEm-Td+A5 mfc\w' pa*bqPi public TestMethod() 3dTz$s/[ { ///xx/weblogic60b2_win.exe 8m\*~IX= try{ gi#bU SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9@/X;zO //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6w|s1!Bl SiteFileFetch fileFetch = new SiteFileFetch(bean); >|'u:`A fileFetch.start(); W_8N?coM } w3WBgH catch(Exception e){e.printStackTrace ();} slaYr`u Z9,-FO{#3- F[RQ6PW } Nk*d=vj $aDAD4mmm \R\?`8Orz public static void main(String[] args) p#go<Y# { Q'>pOtJG*J new TestMethod(); )O*\}6:S } 3|x*lmit } :[YHJaK 点击下载更多相关资料
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