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/* y1AS^' **SiteFileFetch.java cCj3,s/p */ T-x`ut7c package NetFox; qxrOfsh import java.io.*; S_WY91r import java.net.*; oC?b]tzj #?,cYh+ ']rh0? public class SiteFileFetch extends Thread { RoiMvrJQP =kCpCpET 9\n}!{@i SiteInfoBean siteInfoBean = null; //文件信息Bean 8uu:e<PLv long[] nStartPos; //开始位置 >\i{,F=U7 long[] nEndPos; //结束位置 0-#ct1- FileSplitterFetch[] fileSplitterFetch; //子线程对象 {C6Yr9 long nFileLength; //文件长度 [AGm%o=) boolean bFirst = true; //是否第一次取文件 ofi']J{R boolean bStop = false; //停止标志 g 08
`=g File tmpFile; //文件下载的临时信息 iy4JI,-W DataOutputStream output; //输出到文件的输出流 (;M"'.C cCeD3CuRA% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ov+qYBuFw public SiteFileFetch(SiteInfoBean bean) throws IOException mR{0*< { k |Lm;g siteInfoBean = bean; c8Opc"UE //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); {B}0LJIpL tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); :L?zk"0C if(tmpFile.exists ()) Gm%[@7- { S
xg Yq bFirst = false; ^:q(ksssY read_nPos(); ht-6_]+ME } kOjq LA else qI"mW@G~H { &0lNj@/ nStartPos = new long[bean.getNSplitter()]; kP6r=HH@ nEndPos = new long[bean.getNSplitter()]; 9QYU
J } ULJI`I|m `=>Bop) OGVhb>LO1 L%<1C\k } /U`"|3 ?+!KucTF
y>o#Hq&qM public void run() COT;KC6
n { C$hsR& //获得文件长度 8e-{S~@W //分割文件 B}jZ~/D} //实例FileSplitterFetch 6lhVwgy3A //启动FileSplitterFetch线程 l nZ=< T //等待子线程返回 W,<Vr2J[ try{ QO
k%Q$^G if(bFirst) dYsqF
3f { '"TBhisky nFileLength = getFileSize(); {L+?n*;CA if(nFileLength == -1) IFE C_F> { 0s8S`hCn> System.err.println("File Length is not known!"); AV'> } k-89( else if(nFileLength == -2) @-m&X2J+c { QA%GK4F70 System.err.println("File is not access!"); _3E7|drIX } k`&mHSk- else e*g; +nz { 4j | vzyc for(int i=0;i<nStartPos.length;i++) !At _^hSqz {
s9Xeh" nStartPos = (long)(i*(nFileLength/nStartPos.length)); w&H
?; 1 } V^0*S=N for(int i=0;i<nEndPos.length-1;i++) z!1j8o2 { -r,J>2`l nEndPos = nStartPos[i+1]; 06ueE\@Sg } Q`oi=OYB nEndPos[nEndPos.length-1] = nFileLength; :?S2s Ne2 } z><JbSE? } Ri,UHI4 W Y3-P* >Z3}WMgBN //启动子线程 Pc$<Cv|vz
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; LHacHv for(int i=0;i<nStartPos.length;i++) +(<CE#bb[ { <1@_MYo fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8U8"k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), KctD=6 nStartPos,nEndPos,i); ,og@}gOMB
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [<%yU y fileSplitterFetch.start(); Bf7RW[ -v } s=6w-'; V // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~U^0z|. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); jR48.W // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P#yS]F/ nEndPos = " + nFileLength); 2L,e\]2Z // fileSplitterFetch[nPos.length-1].start(); @z2RMEC~ 0nl)0|?Az l&C%oW //等待子线程结束 b'ew
Od= //int count = 0; hsl Js^ //是否结束while循环 E7*]t_p" boolean breakWhile = false; u?aq'
"t B4{A(-Tc 31_5k./ while(!bStop) KDY~9?}TM { =GLsoc-b write_nPos(); +ivz Utility.sleep(500); K_My4>~Il breakWhile = true; R{*p\; Dm5UQe sd=i!r)ya for(int i=0;i<nStartPos.length;i++) ;z[yNW8 { *{tJ3<t(1 if(!fileSplitterFetch.bDownOver) Cd(Ov5% { -nU_eDy breakWhile = false; PCFm@S@Q break; a
@TAUJ, } -Y+[`0$' } b?Vu9! if(breakWhile) ~=c#Ff=Z break; vF*H5\ m<a jOe %_R tBf u{oC //count++; 9t)t-t#P; //if(count>4) y[}BFUy // siteStop(); 20K<}:5t1 } AU
>d1S. tw.%'oJ7 qg'm<[ System.err.println("文件下载结束!"); yJgnw6>r2 } gzuM>lf*{ catch(Exception e){e.printStackTrace ();} 1ra}^H} } {wd.aUB 2Yyc`o0R;h #$#{QEh0} //获得文件长度 578Dl(I#) public long getFileSize() t<$yxD/R { ; xs?^N| int nFileLength = -1; |_2O:7qe try{ M>'-P URL url = new URL(siteInfoBean.getSSiteURL()); lv{Qn~\y& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (D))?jnC httpConnection.setRequestProperty("User-Agent","NetFox"); AJq'~fC;I 4}l,|7_&I esxU44 int responseCode=httpConnection.getResponseCode(); 56L>tP if(responseCode>=400) y/Nvts2!C { &&tQ,5H5 processErrorCode(responseCode); }G-qOt return -2; //-2 represent access is error psYfz)1; } rYc?y lKe aI f9#B(4Tgi String sHeader; BPC$ v\a g*8sh )L^WD$"'Q for(int i=1;;i++) :egSW2"5S { whvM^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); agt7b@-5= //Utility.log(in.readLine()); 8;+t.{ sHeader=httpConnection.getHeaderFieldKey(i); -B@jQg@
> if(sHeader!=null) ncu>
@K$n { 20hE)!A if(sHeader.equals("Content-Length")) /X8b=:h { }!B<MGBd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); C[wnor! break; iT
IW;Cv } V_0e/7}Ya } II),m8G else =#uXO< break; "j~=YW+l } 9t;aJFI } rMLCtGi catch(IOException e){e.printStackTrace ();} Kx#G_N@ catch(Exception e){e.printStackTrace ();} nfl6`)oW Is-Kz}4L UD"e:O_ Utility.log(nFileLength); -6Cxz./#yS JTdK\A>l KLbP;:sr return nFileLength; oA73\BFfP } #B>Hq~ vrC 7CNEP2}:R ]%G[<zD,1 //保存下载信息(文件指针位置) Pbz-I3+66 private void write_nPos() ]`+>{Sx 1 { a*=\-;HaZ try{ dB< \X. output = new DataOutputStream(new FileOutputStream(tmpFile)); U4M!RdG output.writeInt(nStartPos.length); zYF'XB]4 for(int i=0;i<nStartPos.length;i++) &W }ooGg { AnI ENJ // output.writeLong(nPos); 3\6jzD output.writeLong(fileSplitterFetch.nStartPos); :0#!= output.writeLong(fileSplitterFetch.nEndPos); eF:6k qg } G4ZeO:r output.close(); :m-HHWMN } 6ffrV catch(IOException e){e.printStackTrace ();} 2Xgn[oI{ catch(Exception e){e.printStackTrace ();} 5a-8/.}cP } t3G%}d? v@< "b U FWPkvL //读取保存的下载信息(文件指针位置) #2Mz.=#G private void read_nPos() nwW`Q>+#U {
aS:17+! try{ HOXqIZN85 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5Sk87o1E(d int nCount = input.readInt(); qH"e:
wgL nStartPos = new long[nCount]; L
+-B,466 nEndPos = new long[nCount]; { 5h6nYu for(int i=0;i<nStartPos.length;i++) 5(TI2,4 { _?`3zm4 nStartPos = input.readLong(); #jK{)%}mA nEndPos = input.readLong(); yQ6{-:`) } 9/q4]%` input.close(); ]Jm9D= } =suj3.
catch(IOException e){e.printStackTrace ();} 8v c4J5 catch(Exception e){e.printStackTrace ();} P2 f~sx9 } A+:K!|w Rnun() plJ p4|:u[:& private void processErrorCode(int nErrorCode) eDIjcZ { ld`oIEj!P_ System.err.println("Error Code : " + nErrorCode); c tTbvXP } )|'? uN7 CP/`ON +-`Q}~s+ //停止文件下载 kLADd"C public void siteStop() KZ;U6TBiB { sR'rY[^/| bStop = true; 3| g'1X} for(int i=0;i<nStartPos.length;i++) Y#NlbKkzu fileSplitterFetch.splitterStop(); Y!CZ?c)@ HrWXPac
A HI)ks~E/ } xOPSw|!w } 44($a9oa2 //负责部分文件的抓取 dt^yEapjM **FileSplitterFetch.java FpCj$y~3 */ N]} L*o& package NetFox; X62z>mM xlv:+ 3-~_F*%ST import java.io.*; C5 ^_R import java.net.*; 86.!sQ8b J4xt!RW! l*xA5ObV public class FileSplitterFetch extends Thread { k7f[aM 5] ZXe[>H J1yy6Wq3[ String sURL; //File URL H Viu7kue` long nStartPos; //File Snippet Start Position p"JITH:G long nEndPos; //File Snippet End Position hFyN|Dqhds int nThreadID; //Thread's ID U7bG(?k) boolean bDownOver = false; //Downing is over <o^mQq& boolean bStop = false; //Stop identical ^4c2}>f FileAccessI fileAccessI = null; //File Access interface D?8t'3no R qOEQ*k M\>y&'J- public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ,N5Rdgzk { W^P%k:anK this.sURL = sURL; |`E\$|\p this.nStartPos = nStart; Uiv;0Tovl this.nEndPos = nEnd; ^kt#[N nThreadID = id; 7Ja^d-F7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 @X } ,dK% [ {;=+#QK/ (gs"2 public void run() _av%`bb&z9 { x{5I while(nStartPos < nEndPos && !bStop) R8O<}>3a { @fPiGu`L wa@X^]D8 sW@4r/F>:D try{ %fK"g2: URL url = new URL(sURL); 2pxl! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }m\ httpConnection.setRequestProperty("User-Agent","NetFox"); }eULcgRG String sProperty = "bytes="+nStartPos+"-"; M I/9?B httpConnection.setRequestProperty("RANGE",sProperty); 5 S7\m5 Utility.log(sProperty); \ bd?
`." //_v"dqP{) 8.'%wOU@A InputStream input = httpConnection.getInputStream(); d+ql@e ] //logResponseHead(httpConnection); s
<Ag8U8 UTHGjE D9 ,~Fc byte[] b = new byte[1024]; 3:dQN;= int nRead; y[.0L!C { while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ~,m6g&>R { pU<->d;-> nStartPos += fileAccessI.write(b,0,nRead); 6*tI~ //if(nThreadID == 1) r}pYm'e // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pV:X_M6 } NcB^qv Pdrz lu W29@`93 Utility.log("Thread " + nThreadID + " is over!"); A
ElNf: bDownOver = true; .
p<*n6E //nPos = fileAccessI.write (b,0,nRead); 2{|
U } !C&}e8M|eX catch(Exception e){e.printStackTrace ();} }+,1G!?z } {LrezE4 } svHs&v 4B^f"6'
AQ'~EbH( //打印回应的头信息 z;2kKQZm public void logResponseHead(HttpURLConnection con) P8:k"i/6J { u4rG e! for(int i=1;;i++) A@f`g[q { k`'^e/ String header=con.getHeaderFieldKey(i); cK1r9ED| if(header!=null) ;[uJ~7e3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); yAW%y Utility.log(header+" : "+con.getHeaderField(header)); <t.yn\G-w else EO:i+e]= break; CRw.UC\ } o/)]z } "tn]s>iAd= 1<Qb"FN!2 ri.;& public void splitterStop() ApG_Gd. { 4pduzO'I bStop = true; a>ZV'~zTf } !Hr~B.f7 &?#V*-;^ HX7"w
} @9~6+BZOq zw_Xh~4"b UQ}[2x(Kb /* LeF Z%y)F **FileAccess.java Z[[qW
f *//文件访问(定位,写) )4bBR@QM package NetFox; s%1 O}X$c import java.io.*; qm{(.b^ }} J?, >g -2{NI.-Xd public class FileAccessI implements Serializable{ `gDpb.=Y J4;w9[a$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 H"=%|/1M0 RandomAccessFile oSavedFile; kD8$ir'UYG long nPos; ^yb3L1y Rr{mD#+
X6)-1.T& public FileAccessI() throws IOException @4#q { 6k|o<`~, this("",0); _)"-zbh}{ } 8iGS=M wqk D "3(""0Q public FileAccessI(String sName,long nPos) throws IOException SIYBMe { ; :4&nJ*qG oSavedFile = new RandomAccessFile(sName,"rw"); 2FU+o\1% this.nPos = nPos; `u$
Rd oSavedFile.seek(nPos); lR5[UKr } f>!)y- 7 hjf!FY*F b+Sq[ public synchronized int write(byte[] b,int nStart,int nLen) `?f6~$1 { [U]^:sV) int n = -1; 'K&^y%~py, try{ d!0iv'^ t oSavedFile.write(b,nStart,nLen); Z.'j7(tu n = nLen; \kWL:uU } (+uM |a catch(IOException e) W>TG!R 5 { ~wYGTm=(n e.printStackTrace (); uDD{O~wF, } V6Z~#=EQ 3E9 )~$
C 2t] return n; vT@*o=I } qlSI| @CO }aO6% WbJ|]}hJ\ } ]gjQy.c| )XCG4-1 mR,w~wP /* P* X^)R **SiteInfoBean.java d*$L$1S */ K@%o$S?>z_ package NetFox; :1asY:)vNP Me 5Xd| [}$jO,H5r public class SiteInfoBean { ej91)3AO OQ(w]G0LP gn//]|#H+ private String sSiteURL; //Site's URL Es<& 6 private String sFilePath; //Saved File's Path *kYJwO^ private String sFileName; //Saved File's Name 8k{KnH private int nSplitter; //Count of Splited Downloading File N\l|3~ Mmmg3%G1 >\br8=R public SiteInfoBean() -7Bg5{FA {//nSplitter的缺省值为5 pO?v$Rjl //default value of nSplitter is 5 bv^wE,+?o this("","","",5); =jEVHIYt } knn9s0'Q VLPPEV-u g^l~AR public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) k"3@G?JY { 0Q7|2{ sSiteURL= sURL; |LV}kG(2 sFilePath = sPath; ~6A;H$dr sFileName = sName; _u3%16,o this.nSplitter = nSpiltter; &w!(.uDO R$h
B9BK %i6/=
'u } ++sbSl)Q buldA5*!o `+h+X9 public String getSSiteURL() '4Drs}j5 { oeYUsnsbi return sSiteURL; A^c
( } }y1r
yeW< z"nMR_TTu ::p%R@? public void setSSiteURL(String value) s
!IvUc7' { :}UjX|D sSiteURL = value; ,|g&v/WlC% } <a&w$Zc/ tmd{Gx}c u4tv=+jh public String getSFilePath() x4i&;SP0 { y@@h )P# return sFilePath; +[ng99p } m*wDJEKo B)*1[Jf{4 \[G"/]J public void setSFilePath(String value) U2)?[C1q{ { Dz,|sHCmk sFilePath = value; 'rNLh3 } )<%CI#s# ]SAGh|+xl 4p7j"d5 public String getSFileName() )(OGo`4Qz { 1pK(tm return sFileName; DS+BX`i%#p } n/Dg)n? A{dqB z6Fl$FFP public void setSFileName(String value) ay
=B<|! { 1+"d-`'Z2O sFileName = value; X(O:y^sX} } ]4/C19Fe! @EURp m70AWG public int getNSplitter() ly69:TR7I { 1,:QrhC return nSplitter; fRxn,HyV } >7)QdaB V["'eJA,, /oZvm public void setNSplitter(int nCount) \PD%=~ { #]QS nSplitter = nCount; s1R#X~d } :L6%57 } bxPJ5oT A#{I-*D[ k%8kt4\wn6 /* AQtOTT$ **Utility.java y<*\D_J */ LN)yQ- package NetFox; nltOX@P- Lr20xm %__ @G_M public class Utility { Y
O|hwhe_ G({5Lj gW W9{;HGWS public Utility() ^Y!$WP { ;1s;" N
A_8<B^ bl^pMt1fv } EiP N44( C8i4z //线程睡眠 ,<C~DSAyZ public static void sleep(int nSecond) rLY I\ { 3''Uxlo\ try{ \acGSW
.c Thread.sleep(nSecond); ,-kz\N@. } fB&i{_J catch(Exception e) t'yh&44_ { ?=1i:h e.printStackTrace (); s'd\"WaQV } [S-#}C?~ } QxuU3#l 6(7dr?^eGT //日志 RQu[FZT, public static void log(String sMsg) T!pA$eE { zGc]*R System.err.println(sMsg);
R7;X } aI|X~b a[,p1}!_ 2f{a|| public static void log(int sMsg) (WP^}V5 { *5 \'$;Rg System.err.println(sMsg); ,1.Td=lY$ }
|eFaOL| } +.rE|)BPy loHMQKy@ eht>4) /* &T ^bv*P **TestMethod.java \IEuu^ */ V}~',o<m package NetFox; kY9$ M8b #;+SAoN
H(O|y2 public class TestMethod {
9l |*E )>iPx.hVSS 'geN
dx public TestMethod() -a"b:Q { ///xx/weblogic60b2_win.exe <xrya_R? try{ [@3.dd SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); W59 xe&l //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \.GA"_y SiteFileFetch fileFetch = new SiteFileFetch(bean); 8wEJyAu2 fileFetch.start(); ?(}~[ } \C2HeA\#SW catch(Exception e){e.printStackTrace ();}
ttt4h /)dyAX( A6E~GJa } H;DjM;be }I#_H 9[
o$/x} public static void main(String[] args) cFq2 6(e { .ezZ+@LI+# new TestMethod(); 10GU2a$0"$ } ICc:k%wE7 } {h.j6 点击下载更多相关资料
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