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/* $,'r}
% **SiteFileFetch.java \N/T^, */ 0/-[k package NetFox; M|Z]B<_x import java.io.*; HHg=:>L z import java.net.*; MZ% P(5 qK(?\t$ S}fIZ1 public class SiteFileFetch extends Thread { t{x&|%u M{hA` yK [~(!c5 SiteInfoBean siteInfoBean = null; //文件信息Bean !cWKY\lpv long[] nStartPos; //开始位置 U/{cYX long[] nEndPos; //结束位置 )c+ZQq FileSplitterFetch[] fileSplitterFetch; //子线程对象 nFxogCn long nFileLength; //文件长度 ))306*X\ boolean bFirst = true; //是否第一次取文件 o.y4&bC14; boolean bStop = false; //停止标志 NhpGa@[D File tmpFile; //文件下载的临时信息 n;2W=N?y DataOutputStream output; //输出到文件的输出流 !aIIjWz] 2BRY2EF //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) V{c
n1Af public SiteFileFetch(SiteInfoBean bean) throws IOException Udd|. J Rd { X*d,z~k%*d siteInfoBean = bean; 6;5}%
B:#h //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); xr.fZMOh4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =BNmuAY7 if(tmpFile.exists ()) #l{qb]n] { *-` /A bFirst = false; CUY2eQJ{U read_nPos(); %Ix^Xb0 } Y }e$5 else Xj|j\2$ 0 { FDpNM\SR1l nStartPos = new long[bean.getNSplitter()]; DAc jx:~ nEndPos = new long[bean.getNSplitter()]; qItj`F)d } kj+AsQC, MUVp8!*@ <qv:7@ MPNBA1s } !k%Vw18 `YIpZ
rB 1.jW^sM public void run() H:p(C?tk{ { fa"eyBO50 //获得文件长度 H|75, !< //分割文件 u9k##a4.E
//实例FileSplitterFetch 5?6ATP:[ //启动FileSplitterFetch线程 BA
L!6 //等待子线程返回 W\FKAvS try{ &5C%5C~ch if(bFirst) g[:5@fI#* { nD E5A nFileLength = getFileSize(); T>W(Caelq if(nFileLength == -1) .>h|e_E { ^VoQGP/cl System.err.println("File Length is not known!"); >;0z-;k6 } 4[rD| else if(nFileLength == -2) !"p,9 { !4-NbtT System.err.println("File is not access!"); saYn\o"m } ]3 Mm"7` else H6e^"E { Q/0;r{@Tq} for(int i=0;i<nStartPos.length;i++) )3z.{.F {
31J7# S2 nStartPos = (long)(i*(nFileLength/nStartPos.length)); Fda<cS] } )lH?XpfTjm for(int i=0;i<nEndPos.length-1;i++) 5.5dB2w { w;{k\=W3Ff nEndPos = nStartPos[i+1]; zg|yW6l)9 } 2lXsD;[ nEndPos[nEndPos.length-1] = nFileLength; "52wa<MVJ } pOw4H67 } !tX14O~B- 0H;dA1 lzl4pnj //启动子线程 n |.- :Zy fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; AE^&hH0^ for(int i=0;i<nStartPos.length;i++) M>1V3sM { b%T-nY2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kZf7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), AGOK%[[Ws nStartPos,nEndPos,i); }2DeqY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); GTJ\APrH fileSplitterFetch.start(); M`iJ6L } qfN<w&P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vWzNsWPK"{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); LF{ qI?LG // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )pJ}o&J nEndPos = " + nFileLength); P),%S9jP; // fileSplitterFetch[nPos.length-1].start(); NL2n\%n H+_oK
]/ r}03&h~Hc& //等待子线程结束 QT^(
oog= //int count = 0; :tR%y" //是否结束while循环 E39:}_IV boolean breakWhile = false; Cg )#B+ %l3RM*zb vad" N while(!bStop) <}B|4($ { KasOh"W.P write_nPos(); +Y 3_)
Utility.sleep(500); y$\K@B4 breakWhile = true; cS{ l2}E iHQFieZ.E h_y<A@[P} for(int i=0;i<nStartPos.length;i++) ChGwG.-%L { h-!(O^M if(!fileSplitterFetch.bDownOver) eYR/kZ%< { ZOS{F_2. breakWhile = false; 5p"*nkF break; =oiY'}%(i } b*.)m } #v~zf@<KLB if(breakWhile) Na3tK}x break; xp><7{ XwlUkw"q }R}tIC-: //count++; AGrGZ7p] //if(count>4) F fl`;M // siteStop(); 1\zI#"b ^ } Zj`eR\7~ 1mA)=hu ?;uzx7@F System.err.println("文件下载结束!"); .[K{;^> } @0B<b7Jv catch(Exception e){e.printStackTrace ();} F~RUb&*/< } ~V5k ho^1T3 .%~
L //获得文件长度 dbnH#0i public long getFileSize() a$;+-Y { qxd{c8 int nFileLength = -1; &+%CC try{ ]l+2Ca:-[j URL url = new URL(siteInfoBean.getSSiteURL()); <|.S~HLTQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'fK_J}+P httpConnection.setRequestProperty("User-Agent","NetFox"); ]1D>3 7W}~c/ % 6jF~zI^ int responseCode=httpConnection.getResponseCode(); kv `x if(responseCode>=400) r!Mr\ { MZL~IX processErrorCode(responseCode); /[{?zS{ return -2; //-2 represent access is error mc9$" } <-FZ-asem kC LeHH|K T5Pc2R String sHeader; ?&/9b)c S |#!25qAT P[gk9{sv for(int i=1;;i++) QC
]z--wu { |bd5aRS9 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); DYzVV(_J" //Utility.log(in.readLine()); #gsAwna3 sHeader=httpConnection.getHeaderFieldKey(i); PB }$.8 if(sHeader!=null) -Ca.:zX { xbn+9b if(sHeader.equals("Content-Length")) 4b7}Sr=` { 5'oWd
e nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #9
}Oqm break; %tQIKjsVaY } _^&oNm1 } NK"y@)%0 else D8Ni=.ALL break; I`5MAvP } +{Q\B}3cj1 } i<%(Z[9Lk catch(IOException e){e.printStackTrace ();} |wK)(s catch(Exception e){e.printStackTrace ();} cH2
nG:H TR
]lP<m iW |]-Ba\ Utility.log(nFileLength); Az0Yt31= {/B) YR s'LG3YV-< return nFileLength; hoU&'P8 } Rzb663d (y(V,kXwa8 TXrC5AJx //保存下载信息(文件指针位置) oZOFZ-< private void write_nPos() s'/.eaV_ { ym ,S/Uz try{ ]YOQIzkL4} output = new DataOutputStream(new FileOutputStream(tmpFile)); BB>7%~3f output.writeInt(nStartPos.length); Txp~&a03 for(int i=0;i<nStartPos.length;i++) _VY] { 9rA3qj% // output.writeLong(nPos); Zz/w>kAG*{ output.writeLong(fileSplitterFetch.nStartPos); BAzqdG output.writeLong(fileSplitterFetch.nEndPos); ^!kvgm<{$ } 1b_->_9 output.close(); k$I[F<f } Dw.>4bA. catch(IOException e){e.printStackTrace ();} 7a@V2cr@ catch(Exception e){e.printStackTrace ();} ,ew<T{PL } ",~3&wx '# (lq 5
c ?$r+#'asd( //读取保存的下载信息(文件指针位置) '*)!&4f private void read_nPos() U?>zq!C&R { ;#f%vs>Y7i try{ faMUd#o& DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y{jv-&!xB int nCount = input.readInt(); )03.6Pvs nStartPos = new long[nCount]; j-A
S {w nEndPos = new long[nCount]; b*p,s9k7 for(int i=0;i<nStartPos.length;i++) av`b8cGg { tgrQ$Yjk nStartPos = input.readLong(); 4tq>Lx^5U nEndPos = input.readLong(); Tri.>@-u } <`MHra8 input.close(); KP:O]520 } ~vF.k, catch(IOException e){e.printStackTrace ();} L^ +0K}eD catch(Exception e){e.printStackTrace ();} 75^-93 } gHox{*hb[ mZq*o<kTA
;$|+H"g| private void processErrorCode(int nErrorCode) qBCZ)JEN#U { Sb,{+Wk System.err.println("Error Code : " + nErrorCode); RNi&OG( } KTf!Pf?g 2etlR 7:1Hgj( //停止文件下载 ?m~x%[Vn public void siteStop() zGz5|u { +<3tv&" bStop = true; ]B5\S for(int i=0;i<nStartPos.length;i++) ]v9<^! fileSplitterFetch.splitterStop(); @aj"12 5_`.9@eh. BwL:B\ } 071wo7 } ]k,fEn( //负责部分文件的抓取 65<p: **FileSplitterFetch.java C?E;sRr0 */ f$H"|Mbe package NetFox; FE_n+^|k< F.@yNr" y ruN5 import java.io.*; Wt4!XV import java.net.*; %!eK"DKG^ x"N,oDs :X;8$.z public class FileSplitterFetch extends Thread { 4vy!'r@ |d,1mmv@K g[eI-J+F String sURL; //File URL S++}kR);
long nStartPos; //File Snippet Start Position ZZeqOu7^ long nEndPos; //File Snippet End Position g5Hs= c5=\ int nThreadID; //Thread's ID b LxV boolean bDownOver = false; //Downing is over 9Y/c<gbY boolean bStop = false; //Stop identical HVk3F|]V FileAccessI fileAccessI = null; //File Access interface :b.#h7Qt< <p<gx*% z?yADYr9 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 8:0l5cZE { !CsoTW9C: this.sURL = sURL; SJy? ^ this.nStartPos = nStart; J 0s8vAs this.nEndPos = nEnd; p*dez! nThreadID = id; 3Um\?fj>}( fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q 2tGe~H } V;)'FJ)] h~nl
.Q?AzU,2D public void run() Mr`u!T&sc { 4y
P
$l while(nStartPos < nEndPos && !bStop) !UgJ^v { =e ;\I/ 52:oe1-8 ;
4S#6# try{ ;JAe=wt^'I URL url = new URL(sURL); 3J[P(G>Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;w@: httpConnection.setRequestProperty("User-Agent","NetFox"); pR~PB String sProperty = "bytes="+nStartPos+"-"; i#Wl?(-i httpConnection.setRequestProperty("RANGE",sProperty); ]" )i~-|R Utility.log(sProperty); vKI,|UD&- qA03EU &[kwM395 InputStream input = httpConnection.getInputStream(); LoTq2 / //logResponseHead(httpConnection); GLk7#Y 3S.rIai+ }~A-ELe: byte[] b = new byte[1024]; y`\/eX int nRead; .oSKSld while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @NV$!FB< { ,ciNoP*-~% nStartPos += fileAccessI.write(b,0,nRead); (-~tb- //if(nThreadID == 1) |1t30_ /gS // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Nzr zLK } qdcCX:Z< d/* [t! x9@%L{* Utility.log("Thread " + nThreadID + " is over!"); (j cLzq bDownOver = true; U2SxRFs >
//nPos = fileAccessI.write (b,0,nRead); HPU7
` b4 } v3~,1)#aI catch(Exception e){e.printStackTrace ();} ) d\Se9! } dnN" } 0gt/JI($ H:0-.a^ZS 8LiRZ" //打印回应的头信息 43 |zjE public void logResponseHead(HttpURLConnection con) Oj<2_u { ~ae68&L6 for(int i=1;;i++) F.T~txQ~u { i:W
oT4 String header=con.getHeaderFieldKey(i); YF."D%? if(header!=null) 3xj<ATSe //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9K)OQDv%6D Utility.log(header+" : "+con.getHeaderField(header)); .Yh-m else {Y
IVHl break; SXgpj } .
vYGJ8(P } D./e|i? tuUk48!2I W_M]fjL. public void splitterStop() 4jar5Mz { Z0E+EMo bStop = true; czedn_}%Q } 5oORwOP N7Ne *A8CJ } N8m^h:b XrBLw}lD`N (o e;pa /* /V3*[ **FileAccess.java Z1q'4h=F. *//文件访问(定位,写) *]F3pP[ package NetFox; 3>?ip; import java.io.*; /i$&89yod A0&~U0*(~ V+( public class FileAccessI implements Serializable{ )_+#yaC o F@{& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >Z>*Iz,LP RandomAccessFile oSavedFile; #7'ww*+ long nPos; ^=W%G^jJy SDTX0v $\0j:<o public FileAccessI() throws IOException :X@;XEol~ { spFsrB this("",0); \`4}h[ } DY,Sfh;tp nA+[[(6 S:
/ShT public FileAccessI(String sName,long nPos) throws IOException l*%?C* { /$ L;m oSavedFile = new RandomAccessFile(sName,"rw"); 1!=$3]l0Lj this.nPos = nPos; 'v\!}6 oSavedFile.seek(nPos); Sgr<z d'b } &Vl,x/ y
?Q"-o ( }S%a] public synchronized int write(byte[] b,int nStart,int nLen) 2]Y (<PC { ,j2qY'wi int n = -1; !%5{jO1 try{ in B}ydk oSavedFile.write(b,nStart,nLen); KF7f< n = nLen; QmgwIz_ } 2X6y^f';\ catch(IOException e) d6(qc< /!r { >%d]"] e.printStackTrace (); ?J)%.~! } 9lny[ {9 )Cx8?\/c=x y)/d- return n; u4Vc:n } \
fwf\& )\^%w9h d8Upr1_ } hRA.u'M Qaagi
` &I d^n /* S%Ja:0=}? **SiteInfoBean.java ^hbh|Du */ )?4m} package NetFox; V <k_Q@K u1nv'\* c~c3; public class SiteInfoBean { <5L!.Ci -3KB:K< rhL<JTS private String sSiteURL; //Site's URL 2|Tt3/Rn private String sFilePath; //Saved File's Path ,PIdPaV-- private String sFileName; //Saved File's Name R]ppA=1*_l private int nSplitter; //Count of Splited Downloading File b^A&K@[W#, 0BE%~W 2%WZ-l!i public SiteInfoBean() eKu&_q {//nSplitter的缺省值为5 iUl{_vb //default value of nSplitter is 5 #0 ^QUOp this("","","",5); w7%N=hL1 } .+B!mmp Fs&m'g TF3Tha] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) OFUN hbg { dQizM^j sSiteURL= sURL; H ) (K sFilePath = sPath; pX*mX] sFileName = sName; d2(eX\56Z this.nSplitter = nSpiltter; kXG+zsT ^,`Lt * AM Rj N; } 6^
KDc I>P</TE7 &[3!Lk`.0 public String getSSiteURL() EA8(_} { Ye )(9 return sSiteURL; 8zpK;+ } 'TbA^U[ r
Ssv^W+ T!;<Fy"p public void setSSiteURL(String value) auGt>,Zj\Q { ;=e A2 sSiteURL = value; s)To# } 1pz6e8p:m fc!%W#- B8IfE` public String getSFilePath() FyY;F;4P { |d:URuG~:I return sFilePath; +rql7D0st } mCq*@1Lp9 bH,Jddc Je?V']lm public void setSFilePath(String value) uAJ_`o[ { C-2n2OM. sFilePath = value; .b]oB_ } bz>#}P=58G 4/d#)6
'ugG^2Y public String getSFileName() DPe`C%Oc1 { >U) ,^H( return sFileName; j5ui } n_c0=YH Lnj5EY er 3@}_ F<"* public void setSFileName(String value) c=|
a \\ { cb
UVeh7Q sFileName = value; +bQn2PG= } =h&^X>! rP3)TeG6
,p 'M@[ public int getNSplitter() S"_vD<q { r+Z+x{ return nSplitter; 95(VY)_6#A } S)[2\Z{**T Xt~/8)& S[ 2`7'XV public void setNSplitter(int nCount) Ads^y`b { Bq2}nDP nSplitter = nCount; LLU>c]a } d3 N %V.w } 5aWKyXBIx z&-`<uV~ h?CNChRJs /* t8^*s<O **Utility.java 0\gE^=o[ */ w$t2Hd package NetFox; f,?7,? x DSnsi@Mi s ^}V public class Utility { 1yKf=LZ^ x'
I~mw\K{.3M public Utility() [hiOFmMJZ- { P089Mh9 wYF)G;[wM ^.<IT" } DdFVOs| )lW<:?k //线程睡眠 8)H"w$jq public static void sleep(int nSecond) %R_8`4IQ { =|G PSRQ try{ 5N[Y2 Thread.sleep(nSecond); M.l;!U!} } Ao]F_hZ catch(Exception e) 0umfC { "5YsBih e.printStackTrace (); )<~b*^kl\ } >MhkNy } T , n
EeI& //日志 \[8I5w- public static void log(String sMsg) %8$wod6 { pFG~XW System.err.println(sMsg); |Rab'9U^ } ]9x30UXLwD Nls|R LXx3 public static void log(int sMsg) !}vz_6) { 4b<:67
% System.err.println(sMsg); b0&dpMgh: } ?}Mv5SO } 20Rgw ,qr)}s- iE&`Fhf? /* cq!>B{ **TestMethod.java D #A9 */ T8RQM1D_s package NetFox; 9^}GUJy? }SOj3.9{c XCt}>/"s\h public class TestMethod { %b_zUFHPp z24-hC bGSgph public TestMethod() _x>u"w { ///xx/weblogic60b2_win.exe 8,H try{ 3*'!,gK~[ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); HWHGxg['r //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 00$W>Gr SiteFileFetch fileFetch = new SiteFileFetch(bean); -MU^%t;- fileFetch.start(); `rM-b'D } EGa}ml/G catch(Exception e){e.printStackTrace ();} +XIN-8 `@:^(sMo 0_j! t } `9F'mT#o/ K1 $Z=]a+ \"uR&D public static void main(String[] args) T0Gu(c`1d { *=ALns?y new TestMethod(); apYf,"|9 } N(IUNL } ,0])] 点击下载更多相关资料
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