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/* >&K1+FSmyJ **SiteFileFetch.java k<xiP@b{y */ $a|DR package NetFox; \;w+_<zE5{ import java.io.*; #!wL0p import java.net.*; o|\0IG(\ ?QGAiu0 \de824 public class SiteFileFetch extends Thread { ?UAB}CjY IfHB+H
/n=
%# { SiteInfoBean siteInfoBean = null; //文件信息Bean ,LjB%f[ long[] nStartPos; //开始位置 xP<cF long[] nEndPos; //结束位置 {/]Ks8`Dm FileSplitterFetch[] fileSplitterFetch; //子线程对象 w$~|/UrLf long nFileLength; //文件长度 $`:/OA<. boolean bFirst = true; //是否第一次取文件 gf`uC0 boolean bStop = false; //停止标志 p&wXRI File tmpFile; //文件下载的临时信息 S0V%JY;Gv DataOutputStream output; //输出到文件的输出流 H\tz"<*`` B_w;2ZuA //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "]}+QK_ public SiteFileFetch(SiteInfoBean bean) throws IOException -ec~~95 { Las4ux[_ siteInfoBean = bean; B;A^5~b //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ][8ZeM9&p tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =;.#Bds if(tmpFile.exists ()) eW$G1h: { X4emhB bFirst = false; ,Mf@I5? read_nPos(); [gZd$9a } 9Ny{2m=Ye else \~4uEk"] { V#;6<H" nStartPos = new long[bean.getNSplitter()]; H
R$\jJ nEndPos = new long[bean.getNSplitter()]; &P>wIbE } c yq]-B Cj?X+#J/@d .W{\wkn .d:sQ\k~= } C<CE!|sfr k$nQY @,i_
KN6C public void run() o/EA%q1 { 8UArl3 //获得文件长度 FyN@mX //分割文件 *bu/Ko] //实例FileSplitterFetch xXl^\?HC //启动FileSplitterFetch线程 CybHr#LBc //等待子线程返回 K9co_n_L try{ K29]B~0%E if(bFirst) B JDe1W3;' {
^|DI9G(Bs nFileLength = getFileSize(); ($^XF: #5 if(nFileLength == -1) RG=!,#X { W/U&w.$ System.err.println("File Length is not known!"); 7Wg0-{yK4 } kd9rvy0oK else if(nFileLength == -2) 0eY$K7
U { *V(TNLIh; System.err.println("File is not access!"); lJ!+n<K+ } {uEu
^6a5 else J2_D P { :UmY|=v?t for(int i=0;i<nStartPos.length;i++) ye1kI~LO( { =/MAKi}g nStartPos = (long)(i*(nFileLength/nStartPos.length)); nfck3h } iQpKcBx for(int i=0;i<nEndPos.length-1;i++) CMa ~BOt # { E 5PefD\m nEndPos = nStartPos[i+1]; L-[<C/`;t } ^y"Rdv nEndPos[nEndPos.length-1] = nFileLength; (l :;p&[ } _|.q?;C]$ } n0#HPI" ;wCp j9hir ?#^(QR|/ //启动子线程 :`6E{yfM fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; w^09|k for(int i=0;i<nStartPos.length;i++) WZaOw w { Jq) !)={ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;Dg8> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ETe,RY nStartPos,nEndPos,i); 3X,9K23T Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EeWCy5W fileSplitterFetch.start(); xfw)0S } 6bCC6G
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |S#)[83*3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); O G#By6O // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ",
| Euf:yWY nEndPos = " + nFileLength); M
H }4F // fileSplitterFetch[nPos.length-1].start(); eS9/-Y 'Syq!=, rgheq<B: //等待子线程结束 weC$\st:D //int count = 0; U]Q2EL\%
//是否结束while循环 {zhN>n_ boolean breakWhile = false; (</cu$w>H) D t\F]\6sd hH8:7i while(!bStop) Jla ;^X { :i+Tf~k{ write_nPos(); Kr`Cr5v Utility.sleep(500); [aX'eMq breakWhile = true; p%5RE%u GYYk3\r *b9=&:pU( for(int i=0;i<nStartPos.length;i++) jLc4D' { hh`7b ,+ 4 if(!fileSplitterFetch.bDownOver) ?fcQd6-} { zZDa71> breakWhile = false; <T JUKznO break; \M1- } aB~?Y+m } ;,n{6` if(breakWhile) j.X3SQb4G break; 1QXv}36#3n 'cJHOd hb7H- Z2 //count++; C0;c'4( //if(count>4) zuR!,-W // siteStop(); *KSQ^.sYh } ^'r/;(ZF*/ MDa 4U@Q dN
J2pfvv System.err.println("文件下载结束!"); ($&i\e31N } <hg t{b4 catch(Exception e){e.printStackTrace ();} iqURlI);P } "<x%kD ^0ZabR' <)+9PV<w //获得文件长度 D_@WB.eL public long getFileSize() AjB-&Z { -4{sr|
lm int nFileLength = -1; +s.r!?49+ try{ b_@MoL@A! URL url = new URL(siteInfoBean.getSSiteURL()); dM8`!~#&PI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w$4fS httpConnection.setRequestProperty("User-Agent","NetFox"); lpLjfHr
Mp9wYM* _!kL7qJ" int responseCode=httpConnection.getResponseCode(); %{g<{\@4(; if(responseCode>=400) Ds c{- <v { 1foy.3g- processErrorCode(responseCode); .<j\"X( return -2; //-2 represent access is error C]K|;VQ } lO>w|=< z/(^E8F E9t[Mb %0 String sHeader; Fu:VRul=5$ h^eaV,x>= 9m MPkgc for(int i=1;;i++) ^2}0lP| { PJLSDIeN //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); DYkNP:+ //Utility.log(in.readLine()); ^@e4 mO sHeader=httpConnection.getHeaderFieldKey(i); s0
hD;`cm if(sHeader!=null) pTPWToKh { I5PI;t+ if(sHeader.equals("Content-Length")) -Zd0[& '] { 3
4CqLPg8 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {(#Dou break; H'Q4IRT } >QV=q`I } LO0<=4iN( else ^c"
wgRHc< break; `Et)@{iP } <m:8%]%M6 } ?bu-6pkx] catch(IOException e){e.printStackTrace ();} d- w#\ ^ catch(Exception e){e.printStackTrace ();} VJ;4~WgBz ^w'y>uFM dBkw.VOW Utility.log(nFileLength); u*0Ck*pZ FB3C'!'<) oHH-joYnn return nFileLength; `''\FPhh } ," ~ew , 0w}OE8uq ]wCg'EUB //保存下载信息(文件指针位置) f]N2(eM
private void write_nPos() kKwb)i { zI77#AUM try{ 8TIc;'bRM output = new DataOutputStream(new FileOutputStream(tmpFile)); d[ (KgX9 output.writeInt(nStartPos.length); N0h* | for(int i=0;i<nStartPos.length;i++) aj;OG^(!2_ { F@
lJk|*_ // output.writeLong(nPos); R@Ch3l@ output.writeLong(fileSplitterFetch.nStartPos); O+hN?/>v output.writeLong(fileSplitterFetch.nEndPos); ^Rriu $\ } H7!j5^ output.close(); A7,TM& } R,?7|x catch(IOException e){e.printStackTrace ();} qELy'\ catch(Exception e){e.printStackTrace ();} |9cJO@ } }_m/3*x_ ]Gm"U!h* LRl2@&z< //读取保存的下载信息(文件指针位置) ikd~ k>F private void read_nPos() Oo<L~7B { 7kJ =C try{ D0NSzCHx DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); HC4qP9Gs int nCount = input.readInt(); d*;wHA,}F nStartPos = new long[nCount]; MBZ/Pzl~ nEndPos = new long[nCount]; *mH++3h for(int i=0;i<nStartPos.length;i++) 5lehASBz { Fy_D[g nStartPos = input.readLong(); ;^VLx)q nEndPos = input.readLong(); vqDd][ n } :(gZ\q">k input.close(); &0A^_Z .nA } ;s
m )f catch(IOException e){e.printStackTrace ();} J eCKnt= catch(Exception e){e.printStackTrace ();} NJ\ID=3l } n@IpO
i$Q TV#X@jQ rbfP6t:c3 private void processErrorCode(int nErrorCode) NVqJN$z { ^5n"L29V System.err.println("Error Code : " + nErrorCode); }cUq1r-bW } Te&F2`vo fHK`u' t;g=@o9YA //停止文件下载 <49Gsm&0 public void siteStop() I29aja { S[g{
)p) bStop = true; imGg3' for(int i=0;i<nStartPos.length;i++) V?x&.C2Z fileSplitterFetch.splitterStop(); K]5@bm ;la sk4| rt- ^?2c? } mOm_a9ML } Ei@w*.3P< //负责部分文件的抓取 n1D,0+N= **FileSplitterFetch.java ?Ybgzb */ f'501MJu package NetFox; T \d-r#{ oT9dMhx8 90ZMO7_ import java.io.*; wQ!C9Gp3e import java.net.*; 9p|;Hh: PX7@3Y X)P;UVR0 public class FileSplitterFetch extends Thread { |^: A,%> l\+^.ezD R'M=`33M String sURL; //File URL Y|%s =0M long nStartPos; //File Snippet Start Position 3.[ fTrzJ long nEndPos; //File Snippet End Position J0xV\O
!e int nThreadID; //Thread's ID %NH#8#';2 boolean bDownOver = false; //Downing is over /Z':wu\ boolean bStop = false; //Stop identical 3QNu7oo FileAccessI fileAccessI = null; //File Access interface |"t)#BUtL V $'~2v{_ hsYS<] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :xqhPr]e { M.b1=Y this.sURL = sURL; ~MuD`a7#G this.nStartPos = nStart; s#phs`v this.nEndPos = nEnd; t]dtBt].: nThreadID = id; A5U//y![{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ollJ#i9 } O{YT6&.S0 njhDrwN O}$@|w(8; public void run() V 5ve { _[J @w .l( while(nStartPos < nEndPos && !bStop) 'IVNqfC)u { u`K)dH, q.xt%`@aA ~8fy
qE$ try{ 7sgK+
ip URL url = new URL(sURL); wlSl ~A/s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zVeQKN9^Z httpConnection.setRequestProperty("User-Agent","NetFox"); Xaz`L String sProperty = "bytes="+nStartPos+"-"; ,gag_o{*a httpConnection.setRequestProperty("RANGE",sProperty); )Q:.1Hgl Utility.log(sProperty);
e u{ L$T23*9XY Q}/2\Q=)j InputStream input = httpConnection.getInputStream(); 4gyC?#Ede //logResponseHead(httpConnection); c:[z({` I[P43>F3 hrT!S byte[] b = new byte[1024]; hh%fmc int nRead; k
5~#_D> while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [9}D+k F { nw.,`M,N nStartPos += fileAccessI.write(b,0,nRead); '+%<\.$ //if(nThreadID == 1) G&2UXr3 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q$#5>5& } E[IjeJB5 h\]D:S 3u&>r-V6Fn Utility.log("Thread " + nThreadID + " is over!"); *?l-:bc] bDownOver = true; 397IbZ\ //nPos = fileAccessI.write (b,0,nRead); l*l?aI } >VnBWa<j3 catch(Exception e){e.printStackTrace ();} B<V8:vOam } KM'*+.I } VaV(+X |+-D@22y /"Z6\T9 //打印回应的头信息 __B`0t public void logResponseHead(HttpURLConnection con) Rix|LKk{ { 2b&&3u8 for(int i=1;;i++) 9n\b!*x { u;@~P String header=con.getHeaderFieldKey(i); s2IjZF { if(header!=null) dq6|m
}g{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); D]P_tJI Utility.log(header+" : "+con.getHeaderField(header)); 8ch^e[U` else j@ehcK9| break; `<cnb!] } [wLK*9@& } S)n+E\c 9Q*T'+V DK6^\k][V public void splitterStop() xAZ-_}'tW {
_klT bStop = true; e-@.+f2CC } sWG_MEbu W`vgH/lSnZ _"4u?C# } [5"F=tT7WP sYMgi D F"G]afI9+ /* fV>12ici **FileAccess.java Z?@oe-mz *//文件访问(定位,写) :gwM$2vv package NetFox; VKZZTFmV2) import java.io.*; vq?aFX9F D#8uj=/% DI>SW%)> public class FileAccessI implements Serializable{ d?9 b6k? /Wx({N'h$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Kw/7X[|'G RandomAccessFile oSavedFile; %}`zq8Q; long nPos; _MmSi4]yd [yyL2=7 $'I-z.G V public FileAccessI() throws IOException Dr_ (u<[ { zJMm=Mw^ this("",0); >QA;02 } ]-2Q0wTj ukInS:7 #a$k3C public FileAccessI(String sName,long nPos) throws IOException lx)Bj6 { Q
1:7 9 oSavedFile = new RandomAccessFile(sName,"rw"); F5+)=P# this.nPos = nPos; (q
0wV3Qv oSavedFile.seek(nPos); rBLcj;, } CAJ]@P#Xj+ Y3n6y+Uzk ?l/$cO public synchronized int write(byte[] b,int nStart,int nLen) X+$IaLfCxD { O]1aez[ int n = -1; -Uj3?W try{ x("V+y* oSavedFile.write(b,nStart,nLen); 1SwKd*aRR? n = nLen; phc9esz } K}feS(Ji catch(IOException e) x^959QO~ { ?c6`p3p3L e.printStackTrace (); \F'tl{'\@ } /=i+7^ />13?o# Lk>GEi| return n; a49xf^{1"i } @
)2<$d "<Q,|Md ~\yk{1S } Ia%S=xU{= NGs@z^&V K1oSoD8c /* A?;KfVq **SiteInfoBean.java /4M~ 6LT` */ vxt<}h5J/! package NetFox; +#LD@)G j` 5K7~hv "T~ce@ public class SiteInfoBean { Er !s\(h Rch?@O#J )1ct%rue private String sSiteURL; //Site's URL \-Ipa59U private String sFilePath; //Saved File's Path lmbC2\GT private String sFileName; //Saved File's Name T[\?fSP private int nSplitter; //Count of Splited Downloading File a
j13cC$ @ |^;d Ni
Y.OwKr public SiteInfoBean() %h^ f?.(: {//nSplitter的缺省值为5 NN"!kuM //default value of nSplitter is 5 N_Q\+x}zq this("","","",5); \ 0J&^C } JIh:IR(ta RbN# dI' 9J(jbJ7p public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) B4kJ 7Pdny { tvEf-z sSiteURL= sURL; {IG5qi?/E) sFilePath = sPath; 1c19$KHu sFileName = sName; 8;q2W
F{AX this.nSplitter = nSpiltter; C9Xj)5k@R ZmKxs^5S Og E<bw } '.5_L8 7dq*e4z) +m]Kj3-z@ public String getSSiteURL() gu|cQ2xV { Qs
#7<NQ return sSiteURL; wxW\L!@ } (-bLP ? f>pKe 2J1YrHj3 public void setSSiteURL(String value) /xh/M@G3 { 1
[D,Mu%E sSiteURL = value; 1@6FV x } FJH'!P\ 2)^gd F\BD7W public String getSFilePath() p`mNy
o' { TChKm-x return sFilePath; tO8<N'TD } /5&'U!:+ SMIr@*R u0?,CQPL public void setSFilePath(String value) 12y+g5b { :J~sz)n4 sFilePath = value; D)){"Q!b } uNXKUJ V0 E5`KUMZkq $9Pscu bM4 public String getSFileName() gzd)7np B2 { ["}Yp return sFileName; [
m#|[% } vq;_x ^wTod\y s;!Tz) public void setSFileName(String value) T$vDw|KSVP { M_Z(+k{Gy sFileName = value; 8TV
"9{
n } ?o883!&v )4CF*>*6V
TD6MP9L public int getNSplitter() P(Wr[lH\y { U%T{~f return nSplitter; bS"zp6Di } ~Jlo> kHx6]< Bq*aP*jv public void setNSplitter(int nCount) ,o68xfdZVW { p&Ev"xhs nSplitter = nCount; jTE~^ } alz2F.%Y } ReZ&SNJ ZgH(,g,TU RM `zxFn /* dVe **Utility.java r.#"he_6!. */ _+NM<o#A package NetFox; YfZ96C[a f>kW\uC i?D
KKjN$ public class Utility { CF0i72ul5 8-uRn38 Y>i5ubR~ public Utility() b@?pofZ`k { vzPuk|q3 z(JDLd p0Ra`*f } p"k[ac{ tShyG!b //线程睡眠 dp~] Wx public static void sleep(int nSecond) m%[`NP ( { zM+eb| >cr try{ '%\FT-{ Thread.sleep(nSecond); p"ElO,\ } ZCuLgCP?Z catch(Exception e) e=#'rDm { ;fl3'.S[ e.printStackTrace (); 2uy<wJE> } ocDAg<wo } ]46#u=y~3 |
l|7[ //日志 #[ZNiaWT public static void log(String sMsg) NpN-''B\ { >2[nTfS System.err.println(sMsg); Vb$4'K' } A[6D40o .M zAkZ= Wv4o:_} public static void log(int sMsg) ]UFbG40Zo { WO<a^g
{ System.err.println(sMsg);
SdM@7%UK } 71(C@/J } ?@LqrKj11 \2huDNW&
! . ]D7Il /* #Rx|oSc} **TestMethod.java iwS55o */ |z%:{ package NetFox; }V I}O{ j|X>:!4r 2ms@CQy(00 public class TestMethod { zc#$hIi DSX.84 6l,oL'$}P1 public TestMethod() .QVZ! { ///xx/weblogic60b2_win.exe N_^s;Qj try{ n)xLEx, SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); p81Vt //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >jH%n(TcC SiteFileFetch fileFetch = new SiteFileFetch(bean); 6(as.U>K fileFetch.start(); ?Ja&LNI9S } E
Zh.*u@^r catch(Exception e){e.printStackTrace ();} #BLmT-cl 75?z" i G}8Zkz@+ } ~P;KO40K P<s0f:". zvAUF8'_ public static void main(String[] args) SG@-b( { 2T >K!jS new TestMethod(); H4{CiZ } <]e 0TU?bk } 8AgKK=C= 点击下载更多相关资料
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