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/* X- P%^mK **SiteFileFetch.java q-r5z GI */ =6d'/D#J package NetFox; Zfc{}ius import java.io.*; T?KM}<$(O import java.net.*; },%,v2} V( =3K"j $VJE&b public class SiteFileFetch extends Thread { "\O{!Hj8 \F9HsR6 6g)X&pZ SiteInfoBean siteInfoBean = null; //文件信息Bean <Q@{6 long[] nStartPos; //开始位置 ?8ady%
.ls long[] nEndPos; //结束位置 rI'kZ0& FileSplitterFetch[] fileSplitterFetch; //子线程对象 h3(B7n7 long nFileLength; //文件长度 us )NgG boolean bFirst = true; //是否第一次取文件 $AF,4Ir-b+ boolean bStop = false; //停止标志 FPkig`(3 File tmpFile; //文件下载的临时信息 `{&l
_ DataOutputStream output; //输出到文件的输出流 I#-T/1N ~)#xOE} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yHnN7& public SiteFileFetch(SiteInfoBean bean) throws IOException *qKf!& { =zRjb> siteInfoBean = bean; f!bGH-.r5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :MILOwF tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 6.M!WK{+ if(tmpFile.exists ()) ch)#NHZ9F { 2>vn'sXdj bFirst = false; B&sa|'0U read_nPos(); -ze@~Z@ } @#::C@V] else @5\/L6SRfL { h{CMPJjD nStartPos = new long[bean.getNSplitter()]; 8nTdZu nEndPos = new long[bean.getNSplitter()]; N6h.zl&04 } *lyRy/POB y<^hM6S?Z A&`7 l5~X Q32GI,M%B } lTZcbaO?] xz){RkVzP @O| lA public void run() J\Z\q { TL@{yJ;s //获得文件长度 3gz4c1 s^: //分割文件 }b/G{92 //实例FileSplitterFetch 5[A4K%EL //启动FileSplitterFetch线程 WZf}1.Mh* //等待子线程返回 `_E@cZ4 try{
fYzZW if(bFirst) ,S7M4ajVZB { aq$adPtu nFileLength = getFileSize(); ^fhkWx 4i if(nFileLength == -1) .]BJM?9 { h"(HDn q System.err.println("File Length is not known!"); 9m}c2:p } Os)}kkja else if(nFileLength == -2) D1~3 3; { ;mXw4_{ System.err.println("File is not access!"); B'KZ >jO } !z_VwZ#, else PHqIfH [ { J-Wphc!m for(int i=0;i<nStartPos.length;i++) 3ms{gZbw { AjMx \'(C nStartPos = (long)(i*(nFileLength/nStartPos.length)); #6za
} ^vr`t9EE for(int i=0;i<nEndPos.length-1;i++) -MItZ { N}7tjk nEndPos = nStartPos[i+1]; 22"/|S } u|8yV.=R nEndPos[nEndPos.length-1] = nFileLength; S@vLh=65 } BCw0kq@ } <m+$@:cO 5#$5ct av}pT)]\
//启动子线程 ^?gs<-)B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Cs8e("w for(int i=0;i<nStartPos.length;i++) ^
,yh384 { ;T?4=15c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I~NQt^sg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3&7$N#v nStartPos,nEndPos,i); nnBl:p>< k Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qJLtqv fileSplitterFetch.start(); pax;#*QcQ } C]D voJmBs // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), TkV*^j5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); e"6!0Py#* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \&5t@sC nEndPos = " + nFileLength); CDgu`jj%] // fileSplitterFetch[nPos.length-1].start(); x)!NB99(tC s9b 6l,Z ypsT:uLT //等待子线程结束 y1+~IjY //int count = 0; ee{8C~ //是否结束while循环 O;~dao boolean breakWhile = false; nh+f,HtSt . [5{ f
iu?mb=* while(!bStop) jwZBWt )5 { kc-v(WIC write_nPos(); G9P)Y#WB Utility.sleep(500); pm}!?TL breakWhile = true; j?'It`s ET}Dh3A 4^Ghn for(int i=0;i<nStartPos.length;i++) i-_ * 5%A { _T[m YY if(!fileSplitterFetch.bDownOver) d}RR!i`<N { 4]3(Vyh` breakWhile = false; 0s8w)%4$ break; J,j! } l-RwCw4f } G!3d!$t
if(breakWhile) #jNN?,ZK break; 3erGTa[|q &ZUV=q%g9n &
!I$ //count++; o$-!E(p //if(count>4) XB'PEvh8 // siteStop(); by8~'? } )I`Ma6bX 01" b9`jU x-HN]quhe System.err.println("文件下载结束!"); x)Ls(Xh+g } "iY=1F"\R catch(Exception e){e.printStackTrace ();} .#ASo!O5q } @>sZ'M2mq 1O,<JrE+- f/6,b&l, //获得文件长度 CDTM<0`% public long getFileSize() =vZF/r { jjrhl int nFileLength = -1; sHQ82uX try{ %\2w
1 URL url = new URL(siteInfoBean.getSSiteURL()); :gJ?3LwTf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I@<\DltPi httpConnection.setRequestProperty("User-Agent","NetFox"); /"%(i#<)xs "`4V^1 bI"_hvcFp int responseCode=httpConnection.getResponseCode(); kL1StF#p if(responseCode>=400) v8!Ts" { Wy`ve~y processErrorCode(responseCode); :AM5EO return -2; //-2 represent access is error rW(<[2 vg } V O=
o)H\ YXr" ht1d[ String sHeader; U4*Q;A# ^*=.Vuqy w`$M}oX( for(int i=1;;i++) 1$#{om9 { fyE#8h_>4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +__PT4ps //Utility.log(in.readLine()); ^<VJ8jk< sHeader=httpConnection.getHeaderFieldKey(i); [|!A3o if(sHeader!=null) _`(WX;sK { at-+%e if(sHeader.equals("Content-Length")) ,=@%XMS { ?|;q=p`t- nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); vRQ7=N{3 break; ecRY,MN } U'(@?]2<G } QwSYjR:K else shAoib?Kw: break; H]x-s } Lm{qFu } $)O=3dNbo catch(IOException e){e.printStackTrace ();} *VPjBzcH catch(Exception e){e.printStackTrace ();} R@8pKCL. B3V; HDY2<Hzc Utility.log(nFileLength); EDf"1b{PX aF41?.s ,p\:Z3{ZH return nFileLength; e(~9JP9 } ^L@2%}6b` e: aa \_w>I_=F //保存下载信息(文件指针位置) 34gC[G= private void write_nPos() `,lry7] { /Q nq,`z try{ 5SNa~
kC& output = new DataOutputStream(new FileOutputStream(tmpFile)); "A]Xe[oS output.writeInt(nStartPos.length); p9`!.~[ for(int i=0;i<nStartPos.length;i++) -E(0}\ { Glw_<ag[ // output.writeLong(nPos); Sd |=*X output.writeLong(fileSplitterFetch.nStartPos); ._i|+[ output.writeLong(fileSplitterFetch.nEndPos); 15X.gx } NlG~{rfI output.close(); 1z5Oi u } ;#Y'SK catch(IOException e){e.printStackTrace ();} ?;0w 1 catch(Exception e){e.printStackTrace ();} dz>2/' } D,l&^diz #{DX*;1m u9zEhfg8 //读取保存的下载信息(文件指针位置) 5Y(<T~ private void read_nPos() <(c_[o/ { 5mYX#//: try{ iX|K4.Pz{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); e>] gCa int nCount = input.readInt(); =+z +`ot nStartPos = new long[nCount]; Z.l4< nEndPos = new long[nCount]; S<Os\/* for(int i=0;i<nStartPos.length;i++) w$##GM=Tq { x,% %^( nStartPos = input.readLong(); a7@':Rb n nEndPos = input.readLong(); LN0pC}F } ("r\3Mvs input.close(); .V
} :2zga=)g catch(IOException e){e.printStackTrace ();} BH"OphE catch(Exception e){e.printStackTrace ();} o^ zrF } y9)w(y! 6D&{+; /f}!G private void processErrorCode(int nErrorCode) je`Ysbe n { K!,T.qA&= System.err.println("Error Code : " + nErrorCode); rLpfybu } A+w'quXn }Be;YIhG Mm)yabP //停止文件下载 !y\r.fm!A public void siteStop() I?&/J4o: { 8v }B-cS bStop = true; [. Db56 for(int i=0;i<nStartPos.length;i++) {)jTq?? fileSplitterFetch.splitterStop(); >'1[Bh }]
p9 ?yc{@| } v6M4KC2? } y<g1q"F //负责部分文件的抓取 0H/)wy2ym **FileSplitterFetch.java d@XXqCR< */ U
#C@&2 package NetFox; akA7))Q SNJSRqWL/ dM=45$\q import java.io.*; tiGBjTPt import java.net.*; jP{&U&!i 7,lnfCm H lsaA
public class FileSplitterFetch extends Thread { U EjP` ;aN_!!
r S"4eS,5L| String sURL; //File URL g7"2}|qxo long nStartPos; //File Snippet Start Position nSv@FT'~z long nEndPos; //File Snippet End Position ZfMs6`Wv
1 int nThreadID; //Thread's ID KTq+JT u boolean bDownOver = false; //Downing is over 6Hp+?mmh boolean bStop = false; //Stop identical B[,AR"#b FileAccessI fileAccessI = null; //File Access interface BPuum \i'Z(1 M>_vsI^I' public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k-Yli21-/| { 'eo/"~/*w this.sURL = sURL; ;,}Dh/&E this.nStartPos = nStart;
CkV5PU this.nEndPos = nEnd; Qhq' %LR nThreadID = id; w^"IR fileAccessI = new FileAccessI(sName,nStartPos);//定位 v YJ9G"E } ?g9:xgkF
^ d9& `/O AgV"` public void run() jF}-dfe { L^jjf8_ while(nStartPos < nEndPos && !bStop) "Ccyj / { M#_|WL~ F8S>Ld \%|Xf[AX try{ PjD9D. URL url = new URL(sURL); ;1HzY\d%< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); q6,z 1A" httpConnection.setRequestProperty("User-Agent","NetFox"); |h?2~D!+d
String sProperty = "bytes="+nStartPos+"-"; n$F~ httpConnection.setRequestProperty("RANGE",sProperty); Fw S>V2R Utility.log(sProperty); uGv|!UQw {Q}F.0Q L>h|1ZK InputStream input = httpConnection.getInputStream(); yQ)&u+r //logResponseHead(httpConnection); A;<wv>T gYCr,-_i [j}JCmWY byte[] b = new byte[1024]; _i_P@I<M|~ int nRead; " Lh&s<[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [l3ys {
$nb.[si\ nStartPos += fileAccessI.write(b,0,nRead); Ptc+ypTu //if(nThreadID == 1) -&COI-P8 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XEnu0gr } aeISb83Y | }T0O~c{$i PY;tu#W!% Utility.log("Thread " + nThreadID + " is over!"); <.mH-Y5i bDownOver = true; 9Ta0Li //nPos = fileAccessI.write (b,0,nRead); dU#-;/}o } CLTkyS)C catch(Exception e){e.printStackTrace ();} ;=7K*npT } 0k#7LubWZl } *a\6X(
~ 9O- 2 QgI[#d{ //打印回应的头信息 y^"@$ public void logResponseHead(HttpURLConnection con) p- a{6<h { kU+|QBA@ for(int i=1;;i++) L
R\LC6kM { pCDN9*0/ String header=con.getHeaderFieldKey(i); gW,hI> if(header!=null) {#:31)P //responseHeaders.put(header,httpConnection.getHeaderField(header)); n1JtY75#,/ Utility.log(header+" : "+con.getHeaderField(header)); j*5IRzK1%0 else $&=xw _ break; EJ>&\Iq } fZezDm(Q } 6Cz
O
ztn qVKd c*R- @)BO`;*$fF public void splitterStop() WR3,woo { `sCn4-$8 bStop = true; |mP};&b } ^$50[ 5Yhcnwdm! BZ=I/L } {O9(<g 8Z0x*Ssk @zC6` /* {nbT$3=Zt **FileAccess.java <)p.GAZ *//文件访问(定位,写) Lo~;pvv package NetFox; 1_<x%>zG import java.io.*; 59O-"Sc[ s(nT7x+W )Xh}N public class FileAccessI implements Serializable{ o]~\u{o#. -?-XO<I //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 g_1#if& RandomAccessFile oSavedFile; <(q(5jG long nPos; v,S5C &s='$a;4 UWF
\Vx*)b public FileAccessI() throws IOException [Q0V 5P~Q' { v !8=B21 this("",0); t&xoi7!$ } 8 ECX[fw c3 O/#* F?|Efpzow? public FileAccessI(String sName,long nPos) throws IOException *m}8L%<HT { X>Vc4n<} oSavedFile = new RandomAccessFile(sName,"rw"); =w!ik9 this.nPos = nPos; \c
-m\| oSavedFile.seek(nPos); HiA E9 } `^Vd* w.-x2Zg}, dgjK\pH`h public synchronized int write(byte[] b,int nStart,int nLen) Cjx4vP { ;NR|Hi] int n = -1; A<ds+0 try{ uYMn VE" oSavedFile.write(b,nStart,nLen); Xj
1Oxm42 n = nLen; :YI5O/gsk? } _6nAxm&x`% catch(IOException e) u<Kowt<ci { UPI- j#yc e.printStackTrace (); "5&"Ij,/ } ^o{{kju tL$,]I$1+ 0+e=s0s. return n; <NMJkl-r8r } v-tI`Qpb H-PVV&r .;]WcC<3 } pL"{Uqi x
;|HT :QGkYJ /* oFj_o **SiteInfoBean.java ^e8xg=8( */ -K 'UXoU1 package NetFox; 8YFG*HSa taE
p WR{m?neE_N public class SiteInfoBean { fAgeF$9@
rO7_K>g? u%~'+= private String sSiteURL; //Site's URL rx2)uUbR private String sFilePath; //Saved File's Path y:RW:D& private String sFileName; //Saved File's Name F
qH))2 private int nSplitter; //Count of Splited Downloading File ENuL!H>;* C2}y#A I gz~oQ
l)zJ public SiteInfoBean() WT'-.UX m {//nSplitter的缺省值为5 )Ka-vX)D@ //default value of nSplitter is 5 S=_u3OH0 this("","","",5); cXPpxRXBD } .; F<X\_ lo$G*LWu: -qc'J<*^4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) a9-Mc5^'n { NPK; sSiteURL= sURL; ga;nM#/ sFilePath = sPath; Uj7YTB sFileName = sName; k|/VNV( =0 this.nSplitter = nSpiltter; /oT~CB.. ZAr6RRv ^ H~Uf2A)C } ,)1C"' SE+hB {Dpsr` & public String getSSiteURL() ',r` )9o { .dU91> ~Ov return sSiteURL; /o9it; } NV*
2 kG/1 @P7'MiP]K public void setSSiteURL(String value) (%X *b.n= { 1kvX#h&V sSiteURL = value; FOQ-KP\=, } )/jDt dI gy}3ZA*F cy8>M))c public String getSFilePath() 8J3#(aBm { 3gUY13C}:p return sFilePath; V
*@q< rQ } ^*}D*=>\ 7Mh'x:p 28"1ONs3 public void setSFilePath(String value) f6Y?),` { sE?%;uBb sFilePath = value; tg\Nm7I } jlBsm'M<m !igPyhi,hl NCKR<!( public String getSFileName() D,cD]tB2 { v@{y} return sFileName; bo=H-d| } ~rV $.:%va dHY@V>D'- PA^*|^;Xh public void setSFileName(String value) QZVyU8j3 { ;5/Se"Nd sFileName = value; nGVr\u9z } 7KlL%\ 8'Q+%{?1t
nOPB*{r| public int getNSplitter() =78y*`L { .4a|^ vT return nSplitter; jA,y.(mR } Z?eTjkNS# NOTG|\{ -U2Su|:\N8 public void setNSplitter(int nCount) 5S4Nx> { X?haHM#] nSplitter = nCount; /R B%m8@; } 7**zb"#y } j0L%jz (')t>B1Z ;j T{<
Y /* xQZOGq **Utility.java %1{S{FB */ q?j7bp] package NetFox; e)HFI|> l iY/BkpH @g[ijs\ public class Utility { Ov(k:"N 4m\Cc_:jO #bd=G(o~6 public Utility() 1jx?zvE, { OFohyy( Tcy9oYh!Pn &5HI } yFAUD
ro w_U#z(W3l //线程睡眠 <@M5 C-hH public static void sleep(int nSecond) ^h_rE
|c { KYTXf+ oh try{ Zdrniae
ah Thread.sleep(nSecond); "I=Lbh-` } -d?<t}a catch(Exception e) ):Fg {7b]n { Wgf
f+7k e.printStackTrace (); 9vi+[3s/=; } _&HFKpHQ } HxR5&o F~v0CBcAL //日志 F4=X(P_6 public static void log(String sMsg) p_xJKQS { %5L~&W}^" System.err.println(sMsg); l%V+]skS } ."Pn[$'. Ks3YrKk;p "U9e)a0v public static void log(int sMsg) ~e|E5[-i { <YCjo[(~ System.err.println(sMsg); h/5V~ :) } ZXhNn< } vmxS^_I <DMm
[V{ ]Y,V)41gCE /* 1^AQLOiRE1 **TestMethod.java +^J&x>5 */ `_D A! package NetFox; zq5N@dF 6oWFj eZ0 C| public class TestMethod { cm!vuoB~~ iJZvVs', * k\;G? public TestMethod() L]YJ#5 { ///xx/weblogic60b2_win.exe E\2f"s try{ e<DcuF<ZS SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); kJ* N`= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); An]Vx<PD SiteFileFetch fileFetch = new SiteFileFetch(bean); -Nr*na^H9# fileFetch.start(); <}^p5| } Cf 202pF3y catch(Exception e){e.printStackTrace ();} P/S ,dhs( dR s\e(H' 1< b~=" } mJ8EiRSE HII@Ed f? #m{F*(% public static void main(String[] args) U*EBH { 4tkb7D
q new TestMethod(); ,A#gF_8 } KsTE)@F: } $LBgBH&z 点击下载更多相关资料
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