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/* 9+_SG/@ **SiteFileFetch.java ~{/"fTif */ 0"3l2Eo package NetFox; 9Eu.Y import java.io.*; h`;w/+/Zr import java.net.*; 1#/>[B \ ?sM EA) K"C public class SiteFileFetch extends Thread { unY+/p $ T 5$db-^ S&^i*R4] SiteInfoBean siteInfoBean = null; //文件信息Bean iK%%
long[] nStartPos; //开始位置 #0GvL=}k long[] nEndPos; //结束位置 Xt& rYv FileSplitterFetch[] fileSplitterFetch; //子线程对象 AU0pJB' long nFileLength; //文件长度 Rw-!P>S$ boolean bFirst = true; //是否第一次取文件 g]%sX6T boolean bStop = false; //停止标志 P+K< /i File tmpFile; //文件下载的临时信息 %PW_v~sg DataOutputStream output; //输出到文件的输出流 2SVBuV/R 3g
ep_aC //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,aq0Q<}~lc public SiteFileFetch(SiteInfoBean bean) throws IOException ^/b3_aM5d { vVBu/) siteInfoBean = bean; ^qvN:v$1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); aGSix}b1P tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8=\}#F if(tmpFile.exists ()) dX^ ^
@7 { \k&2nYVHf bFirst = false; kn9ul3c read_nPos(); QmxI;l } - >_rSjnM{ else /zV&ebN] { ;=r_R!d@ nStartPos = new long[bean.getNSplitter()]; p`N+9t&I4 nEndPos = new long[bean.getNSplitter()]; fXD9w1 } `-yo-59E[ ~$w9L998+ l4:B( tr?U/YG } [C@|qAh ! W2dMD/ jTHgh>n public void run() wX/0.aZ | { lW6$v*
s9 //获得文件长度 xfegi$ //分割文件 !:BmDX[<n //实例FileSplitterFetch ?5VPV9EX //启动FileSplitterFetch线程 '/O >#1 //等待子线程返回 b}<?& @ try{ yVZLZLm if(bFirst) |tn.ZEgw3~ { w&F.LiX^ nFileLength = getFileSize(); n[+$a)$8 if(nFileLength == -1) w{+G/Ea { }aSTo"~m# System.err.println("File Length is not known!"); 5TynAiSD_> } 1|bg;X9+ else if(nFileLength == -2) <b>g^ `}?D { +PAb+E|, System.err.println("File is not access!"); {#U3A_y } W!jg else t nvCtuaR { e)BU6m% for(int i=0;i<nStartPos.length;i++) ~S\y)l\wZ { 6> DmcG:. nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2UbTKN } M1HGXdN* B for(int i=0;i<nEndPos.length-1;i++) #EG$HX] { wa1Qt nEndPos = nStartPos[i+1]; ka=EOiX. } 9@3cz_[J nEndPos[nEndPos.length-1] = nFileLength; %r
=9,IJ } 0^('hS& } omu)s
'8 xu<oQBt \0fS;Q^{j //启动子线程 15J t
@{<r fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; vCX
54 for(int i=0;i<nStartPos.length;i++) "rVf{ { X:2)C-l? fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &9OnN<mT1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), jCp^CNbA nStartPos,nEndPos,i); 2QIx~Er Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nVyV]'-z fileSplitterFetch.start(); nG4}8 } ,II-:&H // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `=%mU/v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); i K,^|Q8 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]iezwz`' nEndPos = " + nFileLength); \p.eY)> // fileSplitterFetch[nPos.length-1].start(); Gr&YzbSX bDtb"V8e %LjhK,'h //等待子线程结束 \%/Y(YVm //int count = 0; XlJA}^e //是否结束while循环 Um%$TGw5 boolean breakWhile = false; 1c4@qQyo
JRr'81\ h?7@]&VJ while(!bStop) b}HwvS: { 01w}8a( write_nPos(); 4{6XZ_J1 Utility.sleep(500); wX+KW0|> breakWhile = true; jJqq:.XqB8 )0XJOm eKvQS}11 for(int i=0;i<nStartPos.length;i++) @:w[(K[^b/ { hqc)Ydg_% if(!fileSplitterFetch.bDownOver) |C`.m| { H^fErl breakWhile = false; \AY*x=PF break; #-7w| } 6 K-jje;) } 8~|tl, if(breakWhile) 'U*Kb break; Y]neTX [ef AGMrBd|J{ jM[]Uh //count++; uRnSwJ"hE //if(count>4) ?#gYu%7DN // siteStop(); 6b-E|;"]:^ } "w&G1kw5I
+`&-xq76 ?4sF:Y+\ System.err.println("文件下载结束!"); pxV@ fH+` } Z(c2F] catch(Exception e){e.printStackTrace ();} ~{$5JIpCm }
2p;N|V cyXnZs ?| ~8tb^ //获得文件长度 3:MAdh[w public long getFileSize() Dssecc' { BvqypLI int nFileLength = -1; k.6(Q_TS try{ i1^#TC$x URL url = new URL(siteInfoBean.getSSiteURL()); QLDld[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); glUf.:] httpConnection.setRequestProperty("User-Agent","NetFox"); eb=#{ {w52]5l bCmlSu
int responseCode=httpConnection.getResponseCode(); q~6((pWi| if(responseCode>=400) :\69N/uw` { rvETt processErrorCode(responseCode); JAU:Wqlg1 return -2; //-2 represent access is error bR}=bp4K } f0ME$:2 E-i<^&E LWIPq" String sHeader; `kM:5f+>W dPb@[k 4n}^1eQ9 for(int i=1;;i++) "PfNC<MQo { dU.H9\p //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =*=qleC3 //Utility.log(in.readLine()); ~T:L0||.%9 sHeader=httpConnection.getHeaderFieldKey(i); fBZR if(sHeader!=null) A5kz(pj { 'D[g{LkL if(sHeader.equals("Content-Length")) CAtdx! { Y N*"q'Yz_ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); H q."_i{I break; -iySU 6 } vJfj1 f } pa2cM%48 else 2>h.K/pC break; n+H);Dg<8 } DcX,o*ec! } B`/p[ U5 catch(IOException e){e.printStackTrace ();} ,#hx%$f}d catch(Exception e){e.printStackTrace ();} BiI`oCX $94l('B6H ZuVes?&j Utility.log(nFileLength); L%5g]= gQlL0jAV @ZtDjxN
& return nFileLength; _su$]s } ]`u_d}` #9u2LK !fK9YW(Im //保存下载信息(文件指针位置) OE[N$,4I* private void write_nPos() D.Z4noMA6 { xyPz_9 try{ C?fa-i0l^ output = new DataOutputStream(new FileOutputStream(tmpFile)); xSL%1>MrN output.writeInt(nStartPos.length); lbnH|;`$]m for(int i=0;i<nStartPos.length;i++) G !;<#|a { +X4/l"| // output.writeLong(nPos); v|#}LQZ output.writeLong(fileSplitterFetch.nStartPos); Ika(ip#]= output.writeLong(fileSplitterFetch.nEndPos); !F[^?:pK } Yxd&hr output.close(); 6R';[um?q } d'*:2;)g^ catch(IOException e){e.printStackTrace ();} a_amO<!
catch(Exception e){e.printStackTrace ();} p}9bZKyf } Ai 5|N d,*#yzO zqs|~W]c //读取保存的下载信息(文件指针位置) 25m!Bf private void read_nPos() > ?<C+ZHh { WJF#+)P:Y try{ k+`e0Jago DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .F@0`*#rE~ int nCount = input.readInt(); CI~ll=9` nStartPos = new long[nCount]; WbH#@]+DN nEndPos = new long[nCount]; #b5V/)K for(int i=0;i<nStartPos.length;i++) ~E*`+kD { .E&-gXJ4 nStartPos = input.readLong(); ?h7(,39^> nEndPos = input.readLong(); `&!J6)OJ } JsyLWv@6xa input.close(); %:vM D }
QX>Pni catch(IOException e){e.printStackTrace ();} mQqv{1 catch(Exception e){e.printStackTrace ();} u!D AeE } 6%t>T~x eZk4$y 3PgiV%] private void processErrorCode(int nErrorCode) zD%@3NA41 { 2m0laJ3p9 System.err.println("Error Code : " + nErrorCode);
I'>r } $pGdGV\H o<\9OQ0 gy6Pf4Yo //停止文件下载 t-3y`31i. public void siteStop() k.("<) { *9I/h~I bStop = true; TaTs-]4 for(int i=0;i<nStartPos.length;i++) kZJ.G fileSplitterFetch.splitterStop(); )ND%MYJSq g}Esj"7 < rqFBq8 } l4smAT } ExJexjOWI^ //负责部分文件的抓取 ~.L\f%< **FileSplitterFetch.java WC
*e#QP */ '98 0. package NetFox; NB[(O# L-QzC<[F/ ;!H|0sv import java.io.*; 6im!v<1Qx import java.net.*; ~T'Ri= bL"!z"NA Kb5 Y A public class FileSplitterFetch extends Thread { M^3pJ=;5 qt{{q 'mR9Uqq\ String sURL; //File URL eSlZAdK long nStartPos; //File Snippet Start Position C=uYX" long nEndPos; //File Snippet End Position `am]&0g^+( int nThreadID; //Thread's ID sfwlv^ boolean bDownOver = false; //Downing is over *oca boolean bStop = false; //Stop identical "Acc]CqH* FileAccessI fileAccessI = null; //File Access interface 7GVI={b Z[pMlg6Z /Xo8 kC public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException u[;,~eB%w { **! this.sURL = sURL; Gn7P` t*. this.nStartPos = nStart; mpysnKH this.nEndPos = nEnd; =
gbB)u-Pc nThreadID = id; xQK;3b fileAccessI = new FileAccessI(sName,nStartPos);//定位 9/_ F } 1?j['~aE @x@*= Fo@cz"% public void run() 3sy|pa { Sp>v`{F while(nStartPos < nEndPos && !bStop) /
Hg/) { M)v4>Rw+ G378,H %=GF try{ *sbZ{{]e URL url = new URL(sURL); ;%_s4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); F:B8J4/ httpConnection.setRequestProperty("User-Agent","NetFox"); P/hV{@x String sProperty = "bytes="+nStartPos+"-"; @f z!]/ httpConnection.setRequestProperty("RANGE",sProperty); qPI1\!z6 Utility.log(sProperty); h.ln%6:d ]1k"'XG4, Y!C8@B$MR3 InputStream input = httpConnection.getInputStream(); 3j2#'Jf|: //logResponseHead(httpConnection); K,'v{wSr quGvq"Y> GL<u#[ byte[] b = new byte[1024]; /-v6jiM int nRead; UBZ37P while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) eK)R=M@i { G!L(K nStartPos += fileAccessI.write(b,0,nRead); Spqbr@j //if(nThreadID == 1) Gi=s|vt // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]dj
W^C]94 } CfMCc:8mL &?)?
w-$p 8M,AFZ>F Utility.log("Thread " + nThreadID + " is over!"); XVwJr""+ bDownOver = true; l1?$quM^V //nPos = fileAccessI.write (b,0,nRead); _hz}I>G@B } *@1(!A catch(Exception e){e.printStackTrace ();} AIU=56+I\ } xxS>O% } YooPHeQ
}\$CU
N rTmVHt //打印回应的头信息 d(X/N2~g public void logResponseHead(HttpURLConnection con) I)YUGA5 { cKM#0dq for(int i=1;;i++) YQ7\99tj { F).7%YfY String header=con.getHeaderFieldKey(i); gL(_!mcwu if(header!=null) 49?wEm# //responseHeaders.put(header,httpConnection.getHeaderField(header)); rY,zZR+@ Utility.log(header+" : "+con.getHeaderField(header)); S8Ec.]T else !+(c/ gwBh break; p`I[3/$3 } V=cJdF } $c0<I59&| GnFm*L ,%X"Caz public void splitterStop() 49iqrP' { aT_%G&. bStop = true; w}WfQj } =v:}{~M^$ 2K
VX o^8Z cN> } vBLs88
/Y#Q<=X `37%|e 3bQ /* B{hV|2 **FileAccess.java 4o69t *//文件访问(定位,写) <To$Hb,NP package NetFox; ]]eI80u[ import java.io.*; f>zd,|)At o#\c:D*k i[4t`v'Dk public class FileAccessI implements Serializable{ @=NTr GvTA/zA //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 qF3s&WI RandomAccessFile oSavedFile; wvcj*{7[ long nPos; >Hwf/Gf[ Z/e^G f#i %$6?em_ public FileAccessI() throws IOException u/.# zn@9h { ZU68\cL this("",0); 8O| w(z } =v(&qh9Q2 HXb^K U:q4OtiP public FileAccessI(String sName,long nPos) throws IOException OD6dMql { 9yYNX;C oSavedFile = new RandomAccessFile(sName,"rw"); AK//]
this.nPos = nPos; a^eR~efdu@ oSavedFile.seek(nPos); ">v-CSHY } 9WT{~PGj Egi(z9|Pp 9ePR6WS4 public synchronized int write(byte[] b,int nStart,int nLen) r*kz`cJ { ^~kfo| int n = -1; 9|l6.$Me/ try{ d04fj/B
oSavedFile.write(b,nStart,nLen); UWW'[gEP1 n = nLen; ;-quK%VO! } Z\S'HNU catch(IOException e) #Fckev4 { B,4
3b O e.printStackTrace (); /}Ct2w&<k } Q;k
D Jo @g]>D S76xEL return n; $VJE&b } "\O{!Hj8 J?/NJ-F nkkUby9 } c?}{>ig/) i;<K)5Z 1Gw_S?$7 /* "Z#MR`;&29 **SiteInfoBean.java $qk(yzY */ qj<_* package NetFox; |^t8ct?x~ *_tJ ; k1_3\JO"6 public class SiteInfoBean { #3((f[ YojYb]y+j S@vLh=65 private String sSiteURL; //Site's URL LE@`TPg$R private String sFilePath; //Saved File's Path QiQO>r private String sFileName; //Saved File's Name 'fIirGOl private int nSplitter; //Count of Splited Downloading File WHvxBd e]u3[ao QVQ?a&HYS public SiteInfoBean() q/^&si {//nSplitter的缺省值为5 APY*SeIV //default value of nSplitter is 5 ~
H $q this("","","",5); -,}ppTG } Xw<N nvz6 "~aCW~ ^r0mx{i& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9 e0Oj3!B { ompkDl\E sSiteURL= sURL; \&5t@sC sFilePath = sPath; s(M8 Y sFileName = sName; x)!NB99(tC this.nSplitter = nSpiltter; s9b 6l,Z \F8*HPM=* $K*&Wdo } tJ@5E^'4 exL<cN yXL]uh#b public String getSSiteURL() PH3#\
v.
{ 9|RR;k[ return sSiteURL; $.-\2;U } 1U< g "+:~#&r 5b-: e? | public void setSSiteURL(String value) m\?H
<o0 { Jp]eFaqp sSiteURL = value; Ee -yP[2
* } '}$$o1R -%t2_g, #jNN?,ZK public String getSFilePath() %#,EqN { ?\NWKp return sFilePath; #Jqa_$\. } o `N /w 'vUx4s ^z\*;
f public void setSFilePath(String value) %wuD4PRK { ]EZiPW-uy sFilePath = value; MUfhk)" } @>sZ'M2mq 1O,<JrE+- V,qc[*_3 public String getSFileName() mh=YrDU+L { 2RC|u?+@ return sFileName; 8RJ^e[?o( } NLA/XZ W6 U**ir. [:(^n0% public void setSFileName(String value) ~E tW B { QBI;aG<+b> sFileName = value;
BHa'`lCb } j6_tFJT ij<6gv~ n" c;dMXv public int getNSplitter() $06[D91' { lEe<!B$d" return nSplitter; +__PT4ps } ^<VJ8jk< [|!A3o K7CrRT3>6 public void setNSplitter(int nCount) n$O[yRMI[ { hPB^|#} nSplitter = nCount; <//#0r* } d1rIU6 } F$k^px NP#:} ) 7}2Aq /* uVn"'p- **Utility.java =
olmBXn/ */ j aEUz5 package NetFox; R]! [h E kvTl- }pMd/|A, public class Utility { 7(S66 f6r~Ycf,f $ rU"Krf67 public Utility() %H AforH { V6ICR{y<3 vk&6L%_~a 8$TSQ~ } ;qN;oSK KW1b #g%Z //线程睡眠 x[_SNX" public static void sleep(int nSecond) O;dtz\ { 'fIoN% try{ 0lm7'H*~ Thread.sleep(nSecond); H-|%\9&{S } z?DI4O#Up catch(Exception e) ^.HvuG},O { Ok V*,n e.printStackTrace (); 3Hd~mfO\ } &{uj3s&C
} nign"r 45aUz@ //日志 \QvoL public static void log(String sMsg) wJ%;\06 { {)?:d6" System.err.println(sMsg); 9k.5'# } };Oyv7D+b f)x(sk x,% %^( public static void log(int sMsg) a7@':Rb n { LN0pC}F System.err.println(sMsg); /L yoTBG } BtA_1RO } Rl/5eE8 5w+KIHhN| r&y0`M /* 31^Jg **TestMethod.java qC x|}5: */ Kt#_Ln_6 package NetFox; M(/ATOJ( <%iRa$i5 xk*&zAt public class TestMethod { S
T1V QHDR*tB:{ ]T:a&DHC public TestMethod() b$;qtfJG { ///xx/weblogic60b2_win.exe _@5|r|P> try{ vk0b b3){D SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 1)o6jGQ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >'1[Bh SiteFileFetch fileFetch = new SiteFileFetch(bean); }]
p9 fileFetch.start(); Fc6o6GyL|o } S 6CI+W catch(Exception e){e.printStackTrace ();} -^aJ}[uaI [o"<DP6w ?:$\
t?e^ } , UsY0YC i$5<>\g OU
esL9 public static void main(String[] args) { MV,>T_ { ?Qxf~,F new TestMethod(); HSk_'g(\0 } U EjP` } lz7?Z 点击下载更多相关资料
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