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/* #~54t0|Cd> **SiteFileFetch.java &_
Ewu@4 */ A\Q]o#U package NetFox;
yf! import java.io.*;
AA9OElCa
import java.net.*; &E$jAqc x"~F=jT *Wv]DV=\ public class SiteFileFetch extends Thread { ,ijgq EN HHD4#XcU 2>#Pt^R:C SiteInfoBean siteInfoBean = null; //文件信息Bean e
=Vu; long[] nStartPos; //开始位置 Re('7m h~ long[] nEndPos; //结束位置 *TA${$K FileSplitterFetch[] fileSplitterFetch; //子线程对象 $!Z6?+ long nFileLength; //文件长度 ZGa>^k[: boolean bFirst = true; //是否第一次取文件 ;uNcrv0J boolean bStop = false; //停止标志 )'xTDi File tmpFile; //文件下载的临时信息 PIn' tV DataOutputStream output; //输出到文件的输出流 d:O>--$_tw Ze'AZF //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) V^=z\wBZ public SiteFileFetch(SiteInfoBean bean) throws IOException X3I\O,"I { I@a7AuOw siteInfoBean = bean; 'Zf_/y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;Aiuy{< tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &}VGC=F;d if(tmpFile.exists ()) ePK^v_vBD { w`,[w,t bFirst = false; uh%%MhTjv read_nPos(); (1fE^KF@f } #Oz<<G< else 49~5U+x; { m;lwMrY\7> nStartPos = new long[bean.getNSplitter()]; vL{~?vq6
nEndPos = new long[bean.getNSplitter()]; D|,d_W } =;0#F& "{&\ nt :^71,An >E >IC.Zt@ } Y.3]vno?X BS>|M}G)r B%Dy;zdWd/ public void run() }]N7CWy
{ u }D.yI8 //获得文件长度 xIf,1g@Cq9 //分割文件 K5z*DYT //实例FileSplitterFetch ~K 8eRT //启动FileSplitterFetch线程 [#kfl //等待子线程返回 Lg[*P8wE try{ hAHl+q)w? if(bFirst) CtV$lXxup { uz".!K[,wE nFileLength = getFileSize(); 7m{ 'V`F if(nFileLength == -1) 4\x'$G { THWT\3~, System.err.println("File Length is not known!"); R8F[
7&( } *TVr|
to else if(nFileLength == -2) r5Jy( ~ { ^E8&!s System.err.println("File is not access!"); PQ<""_S|| } 9XX&~GW/ else F(^vD_G { wo$9$~( for(int i=0;i<nStartPos.length;i++) VZ'[\3J { ]
NL-)8u nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9xyj,;P> } _N$3c<dY' for(int i=0;i<nEndPos.length-1;i++) RlyF#X#7{ { >B U0B nEndPos = nStartPos[i+1]; ++-HdSHY } 2aX|E4F nEndPos[nEndPos.length-1] = nFileLength; xmb]L:4F } h^D?G2O } SGre[+m~m B/:q
/qed_w.p //启动子线程 n@XI$>B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; QxH%4 )? for(int i=0;i<nStartPos.length;i++) cKdn3 2Y4 { tq H7M0Ry fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tisSj ?+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?>cx;"xF nStartPos,nEndPos,i); >N62t9Ll[ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g&!UaJ[#9 fileSplitterFetch.start(); s]50Y-C } {mrTpw // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D+P( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C$(US8:{ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Yrs7F.Y" nEndPos = " + nFileLength); #( F/P!qk // fileSplitterFetch[nPos.length-1].start(); <{GpAf8- L15?\|':Y >!848J //等待子线程结束 f6vhW66:?x //int count = 0;
&a5UQ> //是否结束while循环 8=CdO|XV boolean breakWhile = false; "s]r"(MX <K; ~~a,Fyko2 while(!bStop) qq.M]?Z { _8A write_nPos(); h/ 5|3 Utility.sleep(500); #%N v\g; breakWhile = true; G
d~
v _ S"'0lS
fI"sdzu^ for(int i=0;i<nStartPos.length;i++) s!,m,l[P { {,NGxqhE if(!fileSplitterFetch.bDownOver) "5
;fuM1 { uzg(C#sp breakWhile = false; Su?e\7aj break; U{i xok } ${m;x: ' } lC/1,Z/M if(breakWhile) EQI9J#;+ break; @W}cM v+Eub;m [As9&]Bv5 //count++; %"-bG'Yc //if(count>4) g>G+?PY // siteStop(); ! yqez } & "i4og< 9gq+,g>E_ R !g'zS' System.err.println("文件下载结束!"); q9Zp8&<EqH }
_U.|$pU catch(Exception e){e.printStackTrace ();} ~,ZU+ } {uUV(FzF6 aeZ$Wu>]W a+'k#m //获得文件长度 1lo.X_ public long getFileSize() &~mJ
).* { ^h\(j*/#X int nFileLength = -1; I3gl+)Q try{ {p\ll URL url = new URL(siteInfoBean.getSSiteURL()); )<Fq}Q86 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n%|og^\0 httpConnection.setRequestProperty("User-Agent","NetFox"); '0-YFx'U0V -pmb-#`M >|X ) int responseCode=httpConnection.getResponseCode(); Q
XSS if(responseCode>=400) Su/8P[q_ { Sq&r
; processErrorCode(responseCode); "QD>m7 return -2; //-2 represent access is error E1r-$gf_ } _(zZrUHB 'C4cS[1 M*!WXQlud String sHeader; :V3z`}Rl (Bq^
D9 dGyrzuPJ for(int i=1;;i++) Y5CDdn { HQvJ*U4++ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2&"qNpPtE //Utility.log(in.readLine()); .k:heN2-x sHeader=httpConnection.getHeaderFieldKey(i); M>E~eb/ if(sHeader!=null) +GJPj(S { u,V_j|(e if(sHeader.equals("Content-Length")) mC0_rN^Aj { b)@D@K"5 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @9eN\b%I^H break; Sn
S$5o } It7R}0Smg } ,Nt^$2DZW else c/Fgx/hr break; iC3C~?,7 } nY7gST } )=#e*1!b catch(IOException e){e.printStackTrace ();} +OqEe[Wk# catch(Exception e){e.printStackTrace ();} l\F71pwSI ? cXW\A( 55' Utility.log(nFileLength); /oW]? 9 76bMy4re OP<N!y ?[ return nFileLength; Nc&J%a } ~`Rar2%B J/fnSy "={* 0P //保存下载信息(文件指针位置) |.,]0CRg private void write_nPos() 41R6V>e@9J { LPBa!fq try{ m~
5"q%; output = new DataOutputStream(new FileOutputStream(tmpFile)); &8w#
4*W output.writeInt(nStartPos.length); O2\(:tvw for(int i=0;i<nStartPos.length;i++) 67hfv e { 5RvE ), // output.writeLong(nPos); :_y!p output.writeLong(fileSplitterFetch.nStartPos); ywl=@ output.writeLong(fileSplitterFetch.nEndPos); {1Y@%e } DI8<0.L output.close(); gyD ;kn\CP } 5@%.wb4 catch(IOException e){e.printStackTrace ();} (:qc[,m catch(Exception e){e.printStackTrace ();} /2zan} } gs;^SRE I 5wmd[YL PcEE`. //读取保存的下载信息(文件指针位置) &oMWs]0 private void read_nPos() M,S'4Szuk { 9sT5l"?g try{ /zt M' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hO&b\#@~ int nCount = input.readInt(); y/y~<-|<@ nStartPos = new long[nCount]; PBnH#zm nEndPos = new long[nCount]; 71\53Qr#U for(int i=0;i<nStartPos.length;i++) # H
w(w { 'St6a* nStartPos = input.readLong(); &:g:7l]g nEndPos = input.readLong(); *s*Y uY%y } ?9a%g\`?: input.close(); A
$gn{ c } n'v\2(&uYN catch(IOException e){e.printStackTrace ();} +x=)Kp> catch(Exception e){e.printStackTrace ();} ] re=8s6 } R__:~uv, #M16qOEw UMR ?q0J private void processErrorCode(int nErrorCode) Z;Hkx1 { L)bMO8JH~m System.err.println("Error Code : " + nErrorCode); <mE`<-$ } VFL^-tXnA^ qU7_%Z 'ZW(Hjrd //停止文件下载 C)z4Cn9# public void siteStop() )&c#?wx'w { k?14'X*7yu bStop = true; m4 (pMrJ for(int i=0;i<nStartPos.length;i++) \~l_w
,Poo fileSplitterFetch.splitterStop(); 3NgXM mkn1LzE|F /ooGyF } &2y4k"B&) } ]8\I{LR //负责部分文件的抓取 P>C'?'Q7 **FileSplitterFetch.java ki9&AFs2X */ YpDJ(61+ package NetFox; "Gp[.=.z? eo0-aHs [j+:2@ import java.io.*; Reikf}9Q import java.net.*; HeAXZA, AU$~Ap*rsa Dcvul4Q public class FileSplitterFetch extends Thread { HrBJi U =.PL\ ^)Hf% String sURL; //File URL 0N,<v7PX long nStartPos; //File Snippet Start Position ,x8;| o5 long nEndPos; //File Snippet End Position b#
N"}-\^ int nThreadID; //Thread's ID
@'R)$:I%L boolean bDownOver = false; //Downing is over 35& ^spb boolean bStop = false; //Stop identical 8%7%[WC# FileAccessI fileAccessI = null; //File Access interface pbzFzLal VI2lwE3 hpAdoy[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 8)X9abC { 7Jf~Bn this.sURL = sURL; 6{y7e L3! this.nStartPos = nStart; 9(N this.nEndPos = nEnd; fjRVYOG# nThreadID = id; @V%\Gspv fileAccessI = new FileAccessI(sName,nStartPos);//定位 VL9wRu; } +`HMl;0m VsQ|t/|# M~taZt4 public void run() +~^S'6yB { TEC^|U`G while(nStartPos < nEndPos && !bStop) SyvoN,;Q { +/ukS6>gr ,X?/FAcb DK IH{:L7 try{ b(*\4n URL url = new URL(sURL); !#KKJ`uB" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b#6S8C+@ httpConnection.setRequestProperty("User-Agent","NetFox"); ~:a1ELqVw String sProperty = "bytes="+nStartPos+"-"; !mNst$-H4 httpConnection.setRequestProperty("RANGE",sProperty); |
&X<- Utility.log(sProperty); tIuM9D{P 9M96$i`P *()['c#CC InputStream input = httpConnection.getInputStream(); fkxkf^g) //logResponseHead(httpConnection); *g(d}C! ?@b6(f
xX "V|Rq]_+% byte[] b = new byte[1024]; H/D=$)3op int nRead; #1<m\z 7l while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) kKyU?/aj { 5|H;%T3_ nStartPos += fileAccessI.write(b,0,nRead); 8M5)fDu*? //if(nThreadID == 1) \"O5li3n // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d0aXA+S% } LqWiw24# UsE\p9mCuV ?qjdmB|w Utility.log("Thread " + nThreadID + " is over!"); 6Og@tho bDownOver = true; 7'\.QJ!< //nPos = fileAccessI.write (b,0,nRead); Z0<Vss } s%jBIeh catch(Exception e){e.printStackTrace ();} ~fXNj-'RW } #HcQ*BiF3 } K"!rj.Da jX7K-L mY 1l2 //打印回应的头信息 Id=20og public void logResponseHead(HttpURLConnection con) IL@yGuO, { gfL :SP8 for(int i=1;;i++) 7U [C=NL { 4&*lpl*N String header=con.getHeaderFieldKey(i); =D(a~8&, if(header!=null) Q7+WV`& //responseHeaders.put(header,httpConnection.getHeaderField(header)); LK h=jB^bT Utility.log(header+" : "+con.getHeaderField(header)); 48xgl1R(j else Ab$E@H# break;
eXl?f_9 } QytO0K5
} :DH@zR 0]>bNbLB" O@$>'Z public void splitterStop() f}c;s { 8r(Vz bStop = true; ?wtKi#k'v# } YdI6|o@vc 6C$+D &OU.BR> } ,88B@a ihkZs3} X"Eqhl<t /* lr&2,p< **FileAccess.java {tVA(&\< *//文件访问(定位,写) 2?,lr2 package NetFox; <(E)M@2 import java.io.*; T)tr"<F5NP S%RxYJ( ZPf&4#| public class FileAccessI implements Serializable{ rT="ciQ thPAD+u.3 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 j Hq+/\ RandomAccessFile oSavedFile; -dMH>e0 long nPos; P#pb48^- 55v=Ij?M :/->m6C`0 public FileAccessI() throws IOException <_/etw86Z { T:j41`g%s this("",0); 9Zx| L/\ } ^3HSw ?a" IlEU6Rs
mcwd2) public FileAccessI(String sName,long nPos) throws IOException #cR5k@ { " "`z3- oSavedFile = new RandomAccessFile(sName,"rw"); ycN!N this.nPos = nPos; SP0ueAa} oSavedFile.seek(nPos); z%fjG} z } m<Gd 6V5 319 4] L{sFR^-G public synchronized int write(byte[] b,int nStart,int nLen) kb-XEJ}L { H(
LK}[ int n = -1; )m-(- I try{ b#709VHm oSavedFile.write(b,nStart,nLen); B4OFhtYE n = nLen; KjA7x } 0>Kgz!I catch(IOException e) Y}vV.q { :hHKm|1FE e.printStackTrace (); V\Lh(zPt } |}l/6WHB BAqwYWdS fN`Prs A return n; rp]H&5.* } LWo )x _Wp,
z` @&h_+|:- } #;2kN
& zPvTRW~H\ CyS.GdyP /* d.sn D)X **SiteInfoBean.java H8c -/ */ ^]LWcJ?"^! package NetFox; 2 $Z4 >! 2J(,Xf [c>YKN2qa public class SiteInfoBean { voN, u>U J<L"D/ t-FrF </0 private String sSiteURL; //Site's URL K>+c2;t; private String sFilePath; //Saved File's Path <XpG5vV private String sFileName; //Saved File's Name M4XU*piz private int nSplitter; //Count of Splited Downloading File bmC{d 5X`m.lhUc GQkI7C public SiteInfoBean() Nrp1`qY {//nSplitter的缺省值为5 i/DUB<>p6 //default value of nSplitter is 5 0Q/BTT%X this("","","",5); +_fxV|}P } xirZ.wj W CwzDkr&QC_ l;J B;0<s" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5,V3_p:)VI { DTV"~>@ sSiteURL= sURL; bq}o#d5p-_ sFilePath = sPath; SR'u*u! sFileName = sName; XuW>GT/ this.nSplitter = nSpiltter; 4q^'MZm1 z!\)sL/" 8z"*CJ@ } "M:0lUy G
C3G=DTt xcl8q: public String getSSiteURL() y[:xGf]8@ { Bt-2S,c,o return sSiteURL; (ft$ R? } &Ukh h.h\)>DM@ Y]{~ogsn$: public void setSSiteURL(String value) @ * *]o { %:]ive]e sSiteURL = value; ;l=ZW } kC-OZ VoO {`1gDKH jG&gd<^ public String getSFilePath() iyf vcKO { t5WW3$Nf return sFilePath; a{7'qmN1 } p!3!&{ vTU*6) %Y// } public void setSFilePath(String value) a@V`EEZ { J PK(S~ sFilePath = value; g
O ;oM?| } <mdHca avo[~ `. f&
>[$zh public String getSFileName() /V@9! { =Hwlo! return sFileName; s xp>9& } tjTnFP/= j>-O'CO 7awh__@ public void setSFileName(String value) m3i+b { TY6Q;BTU sFileName = value; Ga1(T$|H } NhYce> yvp$s dGY:?mf& public int getNSplitter() rsgTd\b { /f0*NNSat- return nSplitter; 2/m4| } sbi+o,%1 E\Et,l#|LY ~ '/Yp8( public void setNSplitter(int nCount) *kE<7 { yhSbX4Q nSplitter = nCount; q71~Y:7f } qzt.k^'-^
} wYAi-gdOi EAPjQA-B? +#V.6i /* $zUHka **Utility.java &K.js */ %!r@l7< package NetFox; g`9`/ M\rZr3 L.tW]43K public class Utility { f5ttQ&@FF N0_@=uE {\62c;. public Utility() |.EC>D/ { 3JJEj1O [;RO= {usv*Cm } xg8$ <Ut a
0+W-#G //线程睡眠 `+0K~k|DC public static void sleep(int nSecond) 2{;~Bgd { O.Xhi+ try{ |Jpi|'
Thread.sleep(nSecond); .Gq]Mrim9G } ;\48Q; catch(Exception e) Lsb` ,: { p38RgEf e.printStackTrace (); AREpZ2GiU } '74*-yd } * ,#SwZ VteMsL/H //日志 m:x<maP#E public static void log(String sMsg) z=1N}l~|* { # ;3v4P System.err.println(sMsg); &X&msEM } T6M=BkcP m[8?d~ .6HHUy public static void log(int sMsg) 8ZL9>"%l { `),ACkU>U System.err.println(sMsg); ,LftQ1*; } Of.%rpgy } gEISnMH nv'YtmR ]gjB%R[.m /* y)uxj-G **TestMethod.java ZZ2vdy38 */ hywy(b3 package NetFox; 4D=^24f`0 hZwJ@ Vm# '1vm]+oM public class TestMethod { B
x-"<^< &3CC | *iiyU}x public TestMethod() %Fp1c K { ///xx/weblogic60b2_win.exe JxmFUheLt try{ #M@Ki1 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); J-5E# v //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); [oDu3Qn SiteFileFetch fileFetch = new SiteFileFetch(bean); &e)V!o@wJV fileFetch.start(); u{8:VX } Aq;WQyZ2 catch(Exception e){e.printStackTrace ();} u#)ARCx ,w {n 4W3 y134m } OOZxs?pR 8>AST, 'bn$"A"{o public static void main(String[] args) 0 HPqoen$ { *IQQsfL) new TestMethod(); .1YiNmW= } nA#N ,^Rr } `G "&IQ8. 点击下载更多相关资料
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