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/* &^3KF0\Q **SiteFileFetch.java
|7XSC," */ wYQTG*&h package NetFox; mr
dG-t(k import java.io.*; +b"RZ:tKp import java.net.*; bwR_ uF ZqT?7 |i _-eF
&D public class SiteFileFetch extends Thread { P9=L?t. PXqLK3AE 3^AycwNBA SiteInfoBean siteInfoBean = null; //文件信息Bean eL3HX _2( long[] nStartPos; //开始位置 GO{o #} long[] nEndPos; //结束位置 g+;)?N*j FileSplitterFetch[] fileSplitterFetch; //子线程对象 ,#3u.=IR[ long nFileLength; //文件长度 {WQH boolean bFirst = true; //是否第一次取文件 P0NGjS|Z{ boolean bStop = false; //停止标志 _PD RUJ File tmpFile; //文件下载的临时信息 X]ow5{e DataOutputStream output; //输出到文件的输出流 Dnn$-W|NC gpW3zDJ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) JRt^YX public SiteFileFetch(SiteInfoBean bean) throws IOException v- M3/* { b fy `UZr siteInfoBean = bean; 6X2>zUHR //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gD E',)3Q, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _Mq0QQ42 if(tmpFile.exists ()) 2c`m8EaJ { vH/z|< bFirst = false; NBHS
read_nPos(); $Y.Z>I; } 7OY<*ny else iU3)4(R { T&Z%=L_Q nStartPos = new long[bean.getNSplitter()]; ,RIGV[u nEndPos = new long[bean.getNSplitter()]; Q;{[U!\: }
$0>>Z GWo^hIfJ iJ.P&T9 `X[L62D } m8'B7|s n!=%MgF'*p PhF.\Wb public void run() e=K2]Y Q{ { ^%l~|w //获得文件长度 0!X;C!v; //分割文件 Y2709LWmP //实例FileSplitterFetch i
bAZ*I //启动FileSplitterFetch线程 QWVH4rg //等待子线程返回 ;d$PQi try{ *fyC@fI> if(bFirst) vJ5` :4n" { +p6cG\Gp nFileLength = getFileSize(); (qd $wv^h if(nFileLength == -1) NX7(;02 { w{uqy] System.err.println("File Length is not known!"); B;Pws$J } W:D'k^u else if(nFileLength == -2) ^9*FYV { ~XAtt\WS
System.err.println("File is not access!"); *V+6409m } _/;k;$gDp else }YUUCq& { YT7,=k _ for(int i=0;i<nStartPos.length;i++) E^uau=F { '}\{4Qst nStartPos = (long)(i*(nFileLength/nStartPos.length)); sute%6yM } O%? TxzX; for(int i=0;i<nEndPos.length-1;i++) .Rt_j
{ p;Ezmz nEndPos = nStartPos[i+1]; v~^c-]4I } .b]
32Ww nEndPos[nEndPos.length-1] = nFileLength; W+k`^A|@ } PZ5BtDm } w5*?P4P P<P4*cOV )zw}+z3st //启动子线程 ,Q|[Yr fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]~S,K}T for(int i=0;i<nStartPos.length;i++) }p-<+sFo { mXZOkx{ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C =fs[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Y4*ezt:;Q nStartPos,nEndPos,i); tI50z khaB Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r,}U-S.w fileSplitterFetch.start(); ! K? o H } hKq <e%oVH // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W\09hZ6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j" wX7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YrAaL"20 nEndPos = " + nFileLength); T' O5>e // fileSplitterFetch[nPos.length-1].start(); OiPE,sv 8joJe>9VJ zTi%j$o //等待子线程结束 ;)Rvk&J5 //int count = 0; |k5uVhN //是否结束while循环 AWlR" p2 boolean breakWhile = false; [@D+kL*> WK7=z3mu Qx,?v|Xg while(!bStop) V0hC[Ilr { "0Xa?z8" write_nPos(); Bi?.w5 Utility.sleep(500); fsc^8 breakWhile = true; ?DP]#9 /4 ;{b 1' bA]/p%rZ8 for(int i=0;i<nStartPos.length;i++) :@LFNcWE { I"awvUP]a[ if(!fileSplitterFetch.bDownOver)
KQsS)ju { 9( ;lcOz breakWhile = false; a<+Qw' break; $<^4G } ]'Y
vI!r } y- S]\tu if(breakWhile) ;)ffGg> break; K{[yS B dRg1I=|{_ n"B"Aysz //count++; J;+AG^U< //if(count>4) TbyQ'MbUv // siteStop(); 5=CLR } nA8]/r1k cy=,Dr9O dR2#n System.err.println("文件下载结束!"); dtJaQ` } <d$kGCz catch(Exception e){e.printStackTrace ();} KA:>7- } @W3fKF9*R $I(2}u?1+d #W<D~C[I _ //获得文件长度 ]>h2h ?2te public long getFileSize() S9X~<!] { $^R[t; int nFileLength = -1; x9r5 ;5TI try{ ,6rg00wGE URL url = new URL(siteInfoBean.getSSiteURL()); kM>0>fkjE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I^ W httpConnection.setRequestProperty("User-Agent","NetFox"); @DK,ka( [.tqgU @
?y(\> int responseCode=httpConnection.getResponseCode(); cWIX!tc8 if(responseCode>=400) kQlXcR { "dwx;E processErrorCode(responseCode); =]x FHw8A return -2; //-2 represent access is error |YjuaXd7N } P\bW k p0 jYKs| J)[ LL Oe String sHeader; )_!t9gn*wr fx|$(D@9 l= 5kd.{ for(int i=1;;i++) xy`aR< L { C/dqCUX: //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); lPm'>,}Y //Utility.log(in.readLine()); _[h1SAJ sHeader=httpConnection.getHeaderFieldKey(i); Cec!{]DL& if(sHeader!=null) YBQO]3f { P(fTlrb if(sHeader.equals("Content-Length")) -[OGZP`8 { *1iJa nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); drTX break; -Zfzl`r } " ^~f.N } (PU0\bGA else l'-dB break; vvw6 GB,M } w C]yE\P1 } j<!rc>)2+L catch(IOException e){e.printStackTrace ();} 0}$",M!p catch(Exception e){e.printStackTrace ();} gsufd{{ Uj}iMw, ' U {?"FP Utility.log(nFileLength); Fc>W]1 :av6*&+ c_a*{L|c return nFileLength; Bn*D<<{T } `/ix[:}m^ Fs_V3i3|L J!%Yy\G //保存下载信息(文件指针位置) zllY$V&<! private void write_nPos() l){l*~5zl2 { 7~TE=t try{ t6_6Bl: output = new DataOutputStream(new FileOutputStream(tmpFile)); ?m#X";^V output.writeInt(nStartPos.length); uy{mSx?td for(int i=0;i<nStartPos.length;i++) +#O?a`f { 69(z[opW // output.writeLong(nPos); tDFN
*#( output.writeLong(fileSplitterFetch.nStartPos); 2Xk(3J!!'a output.writeLong(fileSplitterFetch.nEndPos); F>&Q5Kl R } Oa\!5Pw1 output.close(); Ac<V!v71 } ]hTYh^'e catch(IOException e){e.printStackTrace ();} X<ZIeZBn catch(Exception e){e.printStackTrace ();} )K>XLaG) } u*`acmS>N *>rpcS<l rP,i,1Ar 4 //读取保存的下载信息(文件指针位置) /Q5pAn -u private void read_nPos() -wlob`3 { =UA-&x@ try{ \tLJ( <8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @5Q}o3.zA- int nCount = input.readInt(); ^#e:q nStartPos = new long[nCount]; .z7XYmv nEndPos = new long[nCount]; wIuwq> for(int i=0;i<nStartPos.length;i++) sxJKu { w(n&(5FzB< nStartPos = input.readLong(); y.5mYQA4=[ nEndPos = input.readLong(); )zI<C=])" } g*\u8fpRq input.close(); "t~I;%$[ } h>$,97EU catch(IOException e){e.printStackTrace ();}
' ^gF catch(Exception e){e.printStackTrace ();} +SkD/"5ng } ;Avd$&:: :^lyVQ%@ O:Bfbna private void processErrorCode(int nErrorCode) qrO]t\ { b,/fz6
{N System.err.println("Error Code : " + nErrorCode); A_T-]YQ } zMt "ST. g"(
vl-Uw Y'S xehx //停止文件下载 ?mS798=f public void siteStop() 4JFi|oK0H { Xj"/6|X bStop = true; fG;)wQJ for(int i=0;i<nStartPos.length;i++) o %A4wEye fileSplitterFetch.splitterStop(); lYT}Nc4"=" CjORL'3 :2Qm*Y&_$V } `23&vGk} } )y'`C@ijI //负责部分文件的抓取 r
vVU5zA4H **FileSplitterFetch.java e{U`^ao`F8 */ IB
/.i( package NetFox; QkZT%!7 o1MI&}r S20x import java.io.*; $1.iMHb
import java.net.*; g$kK)z IV;juFw}G wKe^5|Rr public class FileSplitterFetch extends Thread { j[m\;3Sp !tv3.:eT <<LmO-92 String sURL; //File URL n_AW0i. long nStartPos; //File Snippet Start Position Y1+4ppZ long nEndPos; //File Snippet End Position ygS*))7
r int nThreadID; //Thread's ID $$<9tqA boolean bDownOver = false; //Downing is over SG
|!wH^ boolean bStop = false; //Stop identical t*zve,?} FileAccessI fileAccessI = null; //File Access interface BqP:] Hx2UDHF y.JAtsxD public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `r'q(M { XJ?|\=] this.sURL = sURL; U }MU>kzb this.nStartPos = nStart; |^C?~g this.nEndPos = nEnd; M:6H%6eT nThreadID = id; -]~U_J] fileAccessI = new FileAccessI(sName,nStartPos);//定位 >pO[S[ } j\q1b:pE wd~e3%JM ,!F'h:
public void run() TgJx% { %MU<S9k while(nStartPos < nEndPos && !bStop) 1sYwFr 5 { HB {w: (<s7X$(]e R+P,kD? try{ %Ub"V\1 URL url = new URL(sURL); C"k8M\RW? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k7>* fQ89@ httpConnection.setRequestProperty("User-Agent","NetFox"); JxiLjvIq String sProperty = "bytes="+nStartPos+"-"; .hn{m9|U httpConnection.setRequestProperty("RANGE",sProperty); pnca+d Utility.log(sProperty); )"|'= (k6=o';y /],:sS7 InputStream input = httpConnection.getInputStream(); P9:7_Vc //logResponseHead(httpConnection); !w]!\H *y5d&4G2 &E.0!BuqV byte[] b = new byte[1024]; *W y0hnr;] int nRead; D(Zux8l while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _ D1bR7 { ,[,+ _A nStartPos += fileAccessI.write(b,0,nRead); yx3M0Qo //if(nThreadID == 1) g~h`wv' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
'`T.K< } v+znKpE ^TVy:5Ag <5@+:7Dv Utility.log("Thread " + nThreadID + " is over!"); 50rCW)[# bDownOver = true; =bded(3Z //nPos = fileAccessI.write (b,0,nRead); W>K2d
} !-2nIY! catch(Exception e){e.printStackTrace ();} r-^Ju6w{ } ggVB8QN{ } $n(?oyf g}{Rk>k
bnUpH3 //打印回应的头信息 z[0L?~$ public void logResponseHead(HttpURLConnection con) 7SoxsT) { T mH# for(int i=1;;i++) Lx8^V7X { L:%ek3SOz String header=con.getHeaderFieldKey(i); PQWo<Uet if(header!=null) u Y V= //responseHeaders.put(header,httpConnection.getHeaderField(header)); %((F}9_6 Utility.log(header+" : "+con.getHeaderField(header)); ppR~e*rv- else =\J^_g4-l break; =:P9 $ } @Rig@ } ~PHAC@pU W!4GL>9m}A }(Nb]_H public void splitterStop() <po.:c
Ce { `XP]y= bStop = true; _Z#yI/5r } )6PZ.s/F6p bnWIB+%_ ^>.?kh9z } t#&^ -; "%D+_Yb'X c;Hf +n /* mc?5,oz;pz **FileAccess.java A~\:}PN *//文件访问(定位,写) 2fO ~%!.G package NetFox; *1ekw#' import java.io.*; /_xwHiA mdypZ 1f_ |n=m8X public class FileAccessI implements Serializable{ 1'"o; a]k/ L/%3_, //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~4=4Ks0 RandomAccessFile oSavedFile; <#7}'@
long nPos; ~YlbS- AVOqW0Z+y 8 fVI33 public FileAccessI() throws IOException "6Nma)8 { n/pM[gI this("",0); UN`-;! } >9esZA^'; ',z'.t &~6Z)} public FileAccessI(String sName,long nPos) throws IOException 1e'-rm
F { KOV^wSwS oSavedFile = new RandomAccessFile(sName,"rw"); 6G/)q8'G this.nPos = nPos; 8niQG'] oSavedFile.seek(nPos); }z,4IHNn } 7xVI,\qV bo$xonV @y b}9K"GT public synchronized int write(byte[] b,int nStart,int nLen) Xleoh2&M { :)q/8 0@ int n = -1; r*>XkM& M try{ gA2Il8K oSavedFile.write(b,nStart,nLen); .7g^w+W n = nLen; j Z3N+_J1 } v8y77: catch(IOException e) +'=^/! { ?T$i e.printStackTrace (); |w>"oaLN|Q } W`eYd|+C 5ii`!y k^C;"awh return n; .',ikez } Fng":28o *Mg=IEu-6[ jzI\Q{[m' } ~~;fWM ' =5oFutg` }dAb}0XK. /* Zul]ekv **SiteInfoBean.java EqUiC*u8{I */ :QUZ 7^u package NetFox; Dd!MG'%hlb H6/@loO!Xy *.Y!ZaK public class SiteInfoBean { |B)e!# nDiD7:e7=
Y_p private String sSiteURL; //Site's URL M7eO5 private String sFilePath; //Saved File's Path kR-N9|>i private String sFileName; //Saved File's Name WyA>OB<Zeq private int nSplitter; //Count of Splited Downloading File mf,mKgfG X~ P0Q 6%U1%; public SiteInfoBean() w{F8]N>0< {//nSplitter的缺省值为5 cGsP0LkHC //default value of nSplitter is 5 {h&*H[Z z this("","","",5); yIXM}i: } ^(N+s? \r324Bw>2 q}ZZqYk public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (FH4\ 't) { F!|Z_6\tv: sSiteURL= sURL; ^^jF*)DT@ sFilePath = sPath; @2CYv> sFileName = sName; l"IBt: this.nSplitter = nSpiltter; %Q1v8l.} H^K(1
'RQZU*8 } &I:X[=;g Gd%6lab 6\\B{%3R2 public String getSSiteURL() > :!faWX { lr +Kwve return sSiteURL; yeE_1C . } OJ@';ZyT= }s}b]v Lt@4F public void setSSiteURL(String value) ]=WJ%p1l { QMy;?, sSiteURL = value;
*ErTDy(
} aZ*b"3 ~<Gs<c}z 6M"J3\
x public String getSFilePath() dvyE._/v { u\^<V) return sFilePath; Yah3I@xGy } @o9EX } ;l4rg!r(S u5V<f; public void setSFilePath(String value) *vJ1~SRV { "! p#8jR^ sFilePath = value; b1nw,(hLY } r$k
*:A$% o$d; Y2K F8_pwJUpf- public String getSFileName() P%'bSx1 { ~UK)
p;| return sFileName; fR6ot#b } HQt=.#GW Fdm7k){A BxG0vJN| public void setSFileName(String value) cX7xG U { L.U [eH sFileName = value; FLEf( } C.8]~MP ?.\CUVK e<~uU9
lg1 public int getNSplitter() FxM`$n~K { HY5g>wv@ return nSplitter; [Gh T.
} MyCX6+Ci) ~;UK/OZ )uwpeq$j7l public void setNSplitter(int nCount) {*
>$aI { ^CZn<$ nSplitter = nCount; ;?= ] ffa{ } iP|h] ;a+@ } Va(R*38k Xa[gDdbL nt "VH5 /* e`k
2g^ **Utility.java YXrTm[P */ +Y)rv6}m package NetFox; J24UUZ9&$ c#u-E6 %pL
,A5M public class Utility { J^n(WnM*F J%j#gyTU ,_u8y&<|I public Utility() ThJLaNS { 4xtbP\= }k \a~<'X U>:CX
XHRt } `U2Z(9le ^B?{X|U37 //线程睡眠 ,GVHwTZ0` public static void sleep(int nSecond) kSB)}q6a { L)8;96 try{ ?*[t'D9f- Thread.sleep(nSecond); ofcoNLX5c } #`y7L4V*o catch(Exception e) 6dC!&leNi { 9p2"5x e.printStackTrace (); ,8+SQo#3 } p8Lb*7W } )"t=sFxaB ^4B6IF* //日志 yK"U:X public static void log(String sMsg) c{|soc[# { #(ANyU(#e System.err.println(sMsg); =ZzhH};aX } r A0[ y a(d'iAU8^ r6PiZgR public static void log(int sMsg) (tyo4Tz1 { (V{bfDu&h@ System.err.println(sMsg); r{>tTJFD(: } >/5D/}4 } ;`X -.45 kl3#&>e qZ`@Ro /* kj@#oLd% **TestMethod.java Qs#v/r */ ^a<=@0| package NetFox; WAqR70{KM isWB)$q 'e;*V$+ public class TestMethod { [A*vl9= Gxm+5q P1Re7/ public TestMethod() 47`{ e_YP0 { ///xx/weblogic60b2_win.exe t!D=oBCro try{ fm&l0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); [#3:CDT //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); dr,j~ s SiteFileFetch fileFetch = new SiteFileFetch(bean); 3~s0ux[ fileFetch.start(); 6NJ La|&n } cCyg&% zsT catch(Exception e){e.printStackTrace ();} qL A )ckx&e ^row=5]E } W%0-SR CEqfsKrsxE kJJQcjAP: public static void main(String[] args) P63z8^y {
{n.g7S~ new TestMethod(); Td8'z' } kC LeHH|K } eaF5S'k 4$ 点击下载更多相关资料
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