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/* eev-";c **SiteFileFetch.java f}t8V% ^E */ @GWJq
3e package NetFox; bs&>QsI?j import java.io.*; 8Drz
i!} import java.net.*; gkmV;0 1N}vz(0" )`BKEaf public class SiteFileFetch extends Thread { p/U{*i]t 4:9N]1JCb mIZ6[ ? SiteInfoBean siteInfoBean = null; //文件信息Bean 1{AK=H') long[] nStartPos; //开始位置 jx{wOb~oO) long[] nEndPos; //结束位置 z*UgRLKZD FileSplitterFetch[] fileSplitterFetch; //子线程对象 Y:R*AOx long nFileLength; //文件长度 ni85Ne$ boolean bFirst = true; //是否第一次取文件 IG Ax+3V boolean bStop = false; //停止标志 4nrn
Npf`b File tmpFile; //文件下载的临时信息 EO`eg] DataOutputStream output; //输出到文件的输出流 w,az{\ a D+4uGN //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a*&(cn public SiteFileFetch(SiteInfoBean bean) throws IOException q5G`q&O5 { {e5DQ 21. siteInfoBean = bean; v`@NwH<r //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /Nkxb& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *M^<oG if(tmpFile.exists ()) yv|`A2@9 { ,M9e * bFirst = false; bq2f?uD-} read_nPos(); FeZ*c~q } Za,myuI+ else \ZA@r|=$ { L54]l^ls> nStartPos = new long[bean.getNSplitter()]; 61w
({F nEndPos = new long[bean.getNSplitter()]; b Rc,Y< } \U3v5|Q _G&gF.| jU-aa+ %Gl1Qi+Po_ } PIAE6,* ed2r<H$ !QpOrg public void run() }xry { NBL%5!' //获得文件长度 H:)_;k //分割文件 @^Rl{p //实例FileSplitterFetch 15S&,$1& //启动FileSplitterFetch线程 y 2)W"PuG //等待子线程返回 6e8 gFQ"w2 try{ .DI?-=p|_# if(bFirst) osl\j]U8 { 2qot(Zs1i nFileLength = getFileSize(); ,+5:}hR+ if(nFileLength == -1) d'"|Qg_' { wX5q=I System.err.println("File Length is not known!"); d
N$,AO T } !S%0#d2 else if(nFileLength == -2) 1F_$[iIX] { ('{aOiSH System.err.println("File is not access!"); _, E/HAX } Cs(sar:7 else >(-A"jf { *4e?y for(int i=0;i<nStartPos.length;i++) \1SC:gN*# { i),bAU!+m nStartPos = (long)(i*(nFileLength/nStartPos.length)); 'J$@~P } 4l7
Ny\J for(int i=0;i<nEndPos.length-1;i++) ,kf.'N { q^:VF()d_z nEndPos = nStartPos[i+1]; 51u\am'T } @dUN3,} nEndPos[nEndPos.length-1] = nFileLength; ?;_*8Doq-a } 1BEs> Sm } '$c9 S[ r6nnRN/S= :w-:B^VB //启动子线程 $}.+}'7$ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 1+gF fKq for(int i=0;i<nStartPos.length;i++) |;7mDhj= { &=x4M]t9L fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;*$e8y2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), n\M8>9c nStartPos,nEndPos,i); Y!8FW| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yIcTc fileSplitterFetch.start(); c6lCF & } [_nOo ` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `KN>0R2k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); O5aXa_A_u // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", MI'"Xzp{s nEndPos = " + nFileLength); 4=o vm[ // fileSplitterFetch[nPos.length-1].start(); ,zdGY]$ j!w{ Gx8!AmeX //等待子线程结束 y|)VNnWM //int count = 0; .$H"j> //是否结束while循环 ,<* I5: boolean breakWhile = false; n0!2-Q5U)h f9 \$,7F YrJUs]A while(!bStop) */l;e<E { aG83@ABx write_nPos(); pr,,E[ Utility.sleep(500); )AxD|A breakWhile = true; ^Fh*9[Zf$ FuBt`H k#zDY*kj for(int i=0;i<nStartPos.length;i++) 9(J,&)J { n|{#5# if(!fileSplitterFetch.bDownOver) E]rXp~AZm { u5Vgi0}A breakWhile = false; TIxOMY y break; I`_I^C3 } Q"ZpT } 9OV@z6 if(breakWhile) YR*gOTD break; rD~/]y)t .wD
$Bsm`t 0U@#&pUc //count++; }L)[> //if(count>4) &hO-6(^I // siteStop(); ;aV3j/ } W~0rSVD$<z 5h&sdzfG =T,Q7Dh System.err.println("文件下载结束!"); 9-/q-, } T{k_3[{0o catch(Exception e){e.printStackTrace ();} Gk{ 'U } !9WGZfK+0Y gK QJ^a\! ;_vhKU)%J# //获得文件长度 9e=}PL public long getFileSize() -R]0cefC<f { Bd <0} int nFileLength = -1; P*A+k"DU1 try{ zXx/\B$&d* URL url = new URL(siteInfoBean.getSSiteURL()); fJ[ ^_,O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m~5 unB9 httpConnection.setRequestProperty("User-Agent","NetFox"); s`_EkFw>Gl h/t;ZLUAZP Rey+3*zUb int responseCode=httpConnection.getResponseCode(); `z\hQ%1!F if(responseCode>=400) _i}b]xfM { I09 W= processErrorCode(responseCode); O{_t*sO9q* return -2; //-2 represent access is error vt{[_L(h } 8Y.qP"s v*?8 :>:} !i) !|9e String sHeader; v?OVhV m2\\!C]f 6X*vCylI for(int i=1;;i++) Ku l<Q< { 3e&+[j //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Yi%lWbr //Utility.log(in.readLine()); (|K+1R sHeader=httpConnection.getHeaderFieldKey(i); x*7A33@i if(sHeader!=null) "-$}GUK?Z { 1H-Y3G>jN if(sHeader.equals("Content-Length")) FC] *^B { 7b[sW|{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); SG)Fk *1 break; EL$DvJ~ } <#h,_WP* } z3uR1vF' else S-S%IdL break; C P}fxDW } A7Ql%$v7^ } ^x\VMd3*w catch(IOException e){e.printStackTrace ();} P+o"]/7U catch(Exception e){e.printStackTrace ();} G0UaE1n {P8d^=#q 4{YA[' Utility.log(nFileLength); /e0B$UymFu dn#I,xa` f?UI+TU return nFileLength; k9}8xpH } %=UD~5!G0 iAk:CJ{ 9jTBLp-i#N //保存下载信息(文件指针位置) ->b5"{t private void write_nPos() v`Jt+?I { wHj1+W try{ $&as5z8 output = new DataOutputStream(new FileOutputStream(tmpFile)); ._G,uP$ output.writeInt(nStartPos.length); %^@l5h.lqB for(int i=0;i<nStartPos.length;i++) ^YLC {V { o99ExQ. // output.writeLong(nPos); <{kPa_`' output.writeLong(fileSplitterFetch.nStartPos); _u[tv, output.writeLong(fileSplitterFetch.nEndPos); 1?Y>Xz } <-v
zS; output.close(); m[}k]PB> } Ic2?1<I ZA catch(IOException e){e.printStackTrace ();} rE+B}O catch(Exception e){e.printStackTrace ();} S[zvR9AW& } GQtNk<?$I qLmzA@Cv m
!*F5x //读取保存的下载信息(文件指针位置) BYq80Vk%@ private void read_nPos() mKZzSd)p { eTa_RO,x try{ @:}c(j DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y|6n:<o int nCount = input.readInt(); .G[/4h :. nStartPos = new long[nCount]; G?$@6 nEndPos = new long[nCount]; Ab@G^SLX for(int i=0;i<nStartPos.length;i++) :*}Q/]N { =x8[%+ nStartPos = input.readLong(); \ASt&'E nEndPos = input.readLong(); c*)T4n[e } %
"(&a'B input.close(); g{Hgs } (Mk7"FC7 catch(IOException e){e.printStackTrace ();} i1B!oZ3q catch(Exception e){e.printStackTrace ();} t1?aw< } j$)ogGu sLr47 NC Ek L2nI private void processErrorCode(int nErrorCode) u_k[<&$ { "W7|Xp System.err.println("Error Code : " + nErrorCode); `WayR^ 9 } 4C*ywP KnG7w^ Tvx1+0Z%z //停止文件下载 d6J/)nl public void siteStop() OD8
fn { aFTWzz bStop = true; QF>T)1&J[7 for(int i=0;i<nStartPos.length;i++) &*v\t\]
fileSplitterFetch.splitterStop(); &en.
m>9, Wlc&QOfF g+#awi7 } M6g8+ sio } o!tC{"g //负责部分文件的抓取 K?uZIDo **FileSplitterFetch.java +u$l]~St\ */ #LasTN9 package NetFox; q/ljH_- -ZaeX]^&Q\ b}K,wAx
import java.io.*; pl]|yIZ import java.net.*; hP"2X"kz& {:1j>4m2 q}LDFsU public class FileSplitterFetch extends Thread { lbHgxZ dbby.% T-] {gc String sURL; //File URL ?Lg(,-: long nStartPos; //File Snippet Start Position joe)b long nEndPos; //File Snippet End Position d/; tq int nThreadID; //Thread's ID "`% ,l|D boolean bDownOver = false; //Downing is over [M\ an6h6O boolean bStop = false; //Stop identical Jy(G
A FileAccessI fileAccessI = null; //File Access interface GL
n M1 {+J{t\` PJ5}c!o[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 3]*Kz*i { ? "I %K% this.sURL = sURL; tl0|.Q, this.nStartPos = nStart; ?AyxRbk this.nEndPos = nEnd; d>p' A_ nThreadID = id; kOydh(yE fileAccessI = new FileAccessI(sName,nStartPos);//定位 r07u6OA } Xz^nm\ ^^b'tP1> .a@12J(I public void run() V%8(zt { KsKE#])&l while(nStartPos < nEndPos && !bStop) eh9?GUr5 { Dj\nsc@e3 _WEJ,0*#' H,(vTthd try{ #~
x7G
URL url = new URL(sURL); gC1LQ!:;Oi HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k6bct@7 httpConnection.setRequestProperty("User-Agent","NetFox"); h3@tZL#g String sProperty = "bytes="+nStartPos+"-"; ~q ^o|? httpConnection.setRequestProperty("RANGE",sProperty); OFtaOjsyUa Utility.log(sProperty); b G:\*1T U`(=iyWP= ;E.]:Ia~ InputStream input = httpConnection.getInputStream(); vD#U+ //logResponseHead(httpConnection); 'ZF6 Z9 KL_/f !yd B,S byte[] b = new byte[1024]; d0>U-. int nRead; ,j_js8r while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) lx|Aw@C3~ { R%jOgZG nStartPos += fileAccessI.write(b,0,nRead); z x-[@G //if(nThreadID == 1) j}u L // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >?@5>wF } u}%OC43 aGbG@c8PRi 5SY%B#;5G Utility.log("Thread " + nThreadID + " is over!"); n[jXqFm!` bDownOver = true; "u6pl);G //nPos = fileAccessI.write (b,0,nRead); rDWAZ<;; } ogFo/TKM catch(Exception e){e.printStackTrace ();} _pTcSp3 } vqeH<$WHvy } *p(_="J, $}&a*c> c]M+|R5 //打印回应的头信息 cpOt?XYR~ public void logResponseHead(HttpURLConnection con) )k(K/m { X~r9yl> for(int i=1;;i++) LA Crg {
o
]*yI[\ String header=con.getHeaderFieldKey(i); x {NBhq(4 if(header!=null) GJ%^hr`P //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0Q{lyu Utility.log(header+" : "+con.getHeaderField(header)); }h^
fX else 1K9.3n break; eke[{%L } +
+L7*1t } i6#*y!3{ HUx`RX0> b=EI?XwJ public void splitterStop() !P{ /;Q { |Y!^E %* bStop = true; )Eozo4~ } +Csb8 -PPwX~;! Z,)H f } +v
B}E 2'fd4rE5 O!"K'Bm /*
:tZsSK **FileAccess.java dUv@u!}B *//文件访问(定位,写) wH|%3@eJ package NetFox; cP?GRMX@} import java.io.*; 8ae`V!5 li%@HdA! pb97S^K[ public class FileAccessI implements Serializable{ U;bx^2<m N*A*\B%{x' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Iy_5k8] RandomAccessFile oSavedFile; AZ!/{1 Az long nPos; b:S$oE 9?\cm}^? ^|MS2' public FileAccessI() throws IOException }n&nuaj { "bej#'M# this("",0); +<\LY(o } 8[@,i|kgg0 +'m9b7+v 11l=zv public FileAccessI(String sName,long nPos) throws IOException ->I.D?p { FsqH:I4O oSavedFile = new RandomAccessFile(sName,"rw"); 5X^\AW this.nPos = nPos; X4o#kW oSavedFile.seek(nPos); NV./p`k } (A?>U_@ YW7w>}aW ;>7~@
K public synchronized int write(byte[] b,int nStart,int nLen) HB )+.e { "[
S[vkI int n = -1; x;W!sO@$ try{ qXtC7uNj$ oSavedFile.write(b,nStart,nLen); _`SDG5 n = nLen; !mK()# 6 } Sd6O?&( catch(IOException e) 7Q!ksp { [7><^?t
V e.printStackTrace (); diXWm-ZKL } ,It0brF .M:&Aj)x16
(7X return n; QI[WXxp } uT]$R _EMXx4J ?Q_ @@) } q# j[0,^ $ ?sHZeWZ( g}`g>&l5 /* q!W,2xqZoq **SiteInfoBean.java gbMA-r:IC */ Vn_&q6Pa package NetFox; f8-`bb x6K_!L*Fx] Ho(MO!( public class SiteInfoBean { \L>XF'o #eYYu2ND (g;O,`|c, private String sSiteURL; //Site's URL -|'@:cIZ private String sFilePath; //Saved File's Path -Jd7 private String sFileName; //Saved File's Name Z+V%~C1 private int nSplitter; //Count of Splited Downloading File W)1nc"WqY H^Pq[3NQ JX'}+.\ public SiteInfoBean() kVLZdXn,q2 {//nSplitter的缺省值为5 | K|AUI //default value of nSplitter is 5 y3j$?oM this("","","",5); nOyG7: } JA{kifu0+ t!wbT79/ pOK=o$1V8 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;ZB=@@l( { Vw;iE=L sSiteURL= sURL; <
R"Y^]P= sFilePath = sPath; PoZ$3V$(Lz sFileName = sName; !9gpuS[ this.nSplitter = nSpiltter; ^%*qe5J yuC"V' Q=!QCDO( } T.De1Q| \ MuKS4 #HL$`&m public String getSSiteURL() 0qR#o/~I { W+u@UJi return sSiteURL; +;!^aNJ, } eAO@B G>^= Bm_$ bh"
Caz.(t public void setSSiteURL(String value) zk }SEt- { 5[\g87\ sSiteURL = value; bLl
?!G. } /E/6(c ]l }v \Uh/(q7 public String getSFilePath() 0F uj-q { dw#pObH|` return sFilePath; HziQ%QR } B_#M)d
O `!N.1RP _ Wv5=$y public void setSFilePath(String value) >mQD/U { a%y*e+oM sFilePath = value; NjS<DzKhK } {<IHiB35q pV<K=;:x> ?`vGpi~ public String getSFileName() e]1)_;b* { Dg^s$2 return sFileName; + d>2 ' } k=t{o wR 2`*.O /hg^hF public void setSFileName(String value) Q_/UC#I8 { Oc~<`C~ sFileName = value; ,X|
>d } kFQo[O] G{pF! q U&^(%W# public int getNSplitter() aa]| { U0|wC,7" return nSplitter; fZs}u<3Q) } !j6CvclT FBi&MZ` n%2c<@p# public void setNSplitter(int nCount) *` - { q%s<y+ nSplitter = nCount; Yh,,(V6 } aEUEy:. } heES
[ =J-&usX % T$!I (L& /* fuf'r>1n **Utility.java Cs]\3R|D` */ J{;\TNkJ package NetFox; "2!5g )iO q.hpnE~#lh sz7<u| public class Utility { {Y+e|B0 4\U"e* 9nd,8Nji public Utility() N+UBXhh { 4fL>Ou[YuX \J~@r1 7CU<R9Kl } 6C_H0a/h& j%S}
T)pX //线程睡眠 mg3YKHNG public static void sleep(int nSecond) ZV/g_i# { MA=gCG/JD try{ H8Ra !FW@ Thread.sleep(nSecond); IYr4 } F6{Q1DqI catch(Exception e) 93)1 { ~!fOl)F e.printStackTrace (); :y~l?0b&8 } nqYarHi } <7%#RJw e (^|vN; //日志 0;5qo~1 public static void log(String sMsg) utdus:B#0 { 0d,&) System.err.println(sMsg); |@D%y& } CrGDo9JdvT U4NA'1yo + VhD]! public static void log(int sMsg) N@? z&urQi { R"`<ZY6(Ou System.err.println(sMsg); }1Hy[4B(k\ } ~Ctq } I~M@v59C Wh?3vZ^ T ^`R /* *kGk.a= **TestMethod.java |r`0< ` */ FPAj}as package NetFox; p?<T
_9e x]"N:t L# .vbf public class TestMethod { Ap(>mUs!i Qv;^nj{\qV -
[vH4~ public TestMethod() 2,6|l.WFpE { ///xx/weblogic60b2_win.exe CVgVyy^ try{ OYIH**? SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); H3|x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]#O~lq SiteFileFetch fileFetch = new SiteFileFetch(bean); /kFw(l_. fileFetch.start(); T;Ra/H } enQev?8% catch(Exception e){e.printStackTrace ();} ?Hf8<C} 3 x1.yi- 3AC/;WB9 } uWr vkLGN Qvhy9Cr; nxx&aq(._ public static void main(String[] args) N9AM% H$7 { s+]6X*) new TestMethod(); X|pOw," } 3Yf!H-(\uB } S4>1 d- 点击下载更多相关资料
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