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/* D3%2O`9 **SiteFileFetch.java d`=LZio */ o"_'cNAz package NetFox; r4<aEj;l import java.io.*; 0m"Ni:KEf import java.net.*; `#vbV/sM
NRgVNE NFKvgd@ public class SiteFileFetch extends Thread { ;47z.i&T sx}S,aIU !&NrbiuN SiteInfoBean siteInfoBean = null; //文件信息Bean `uH7~ r^ long[] nStartPos; //开始位置 euVj,m long[] nEndPos; //结束位置 kX8NRPW FileSplitterFetch[] fileSplitterFetch; //子线程对象 iq[IZdza long nFileLength; //文件长度 $L?KNXHAF! boolean bFirst = true; //是否第一次取文件 d325Cw? boolean bStop = false; //停止标志 vm'Z A7f6 File tmpFile; //文件下载的临时信息 CPMGsW^ DataOutputStream output; //输出到文件的输出流 '4Fwh]Ee 9y<h.T //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -4zV
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S< public SiteFileFetch(SiteInfoBean bean) throws IOException tC5-^5[y { L(sT/ siteInfoBean = bean; ;{q* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); PB?2{Cj tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); c&FOt if(tmpFile.exists ()) !a-B=pn!] { 0!7p5 bFirst = false; ! Dj2/][ read_nPos(); V; CPn } +jyGRSo else X6 N&:< { 7nFOVZ nStartPos = new long[bean.getNSplitter()]; /
*PHX@ nEndPos = new long[bean.getNSplitter()]; bLAHVi<. } 2#r4dr0 :tI
F*pC R&a$w8 {]Hv*{ ] } /-G_0A2wF 9dBxCdpu ,&qC
R
sw public void run() eZN"t~\rX { "H<us?r{ //获得文件长度 k)|.< //分割文件 ;i'[c` //实例FileSplitterFetch zsJermF,O //启动FileSplitterFetch线程 LO>42o?/i //等待子线程返回 WmN(
( try{ A`ajsZ{q, if(bFirst) R&J?XQ { }v4dOGc? nFileLength = getFileSize(); 7B (%2 if(nFileLength == -1) x+pf@?w { 2\QsF,@`YU System.err.println("File Length is not known!"); 9 fYNSr } 3RT\G0?8f else if(nFileLength == -2) qc5[e { #j=yQrJ System.err.println("File is not access!"); G{E`5KIvm } Zd-6_,r else
2wHbhW[ { >3Q|k{97 for(int i=0;i<nStartPos.length;i++) ne/JC( { 5<R m{ nStartPos = (long)(i*(nFileLength/nStartPos.length)); [!-gb+L } G0Qw&
mqF for(int i=0;i<nEndPos.length-1;i++) Vm>E F~ r { >MYDwH nEndPos = nStartPos[i+1]; 9;?u% } ~"CGur P nEndPos[nEndPos.length-1] = nFileLength; }Mt1C~{( } 7K:V<vX5 } HP1QI/*v (rkg0 bAGKi. //启动子线程 G9 O6Fi fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ow.!4kx{ d for(int i=0;i<nStartPos.length;i++) wz*iwd- { (Y@T5-!D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $?G@ijk, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |f#hGk6 nStartPos,nEndPos,i); pX?3inQP%( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); v/.'st2% fileSplitterFetch.start(); f,KB BBbG } cN8Fn4gq // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'in%Gii siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); v#d\YV{I // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %gh#gH nEndPos = " + nFileLength); N}K
[Q= // fileSplitterFetch[nPos.length-1].start(); ?YLq
iAA ~<m^ r~j
[Qm"CJ //等待子线程结束 DylO;+ //int count = 0; C;N6",s! //是否结束while循环 YAOfuas]j boolean breakWhile = false; [ 49Cvde^ 7RL J MQ-u9=ys while(!bStop) {;c'@U { nQjpJ
/= write_nPos(); '\tI| Utility.sleep(500); cR/Nl pX breakWhile = true; jTvcKm|q %+N]$Q Pc`d]*BYi for(int i=0;i<nStartPos.length;i++) )Y7H@e\1 { VAz4@r7hkq if(!fileSplitterFetch.bDownOver) ApXf<MAy { 'z(Y9%+a breakWhile = false; f
+{=##'0 break; gwRB6m$ } <46&R[17M } FklR!*oL,) if(breakWhile) G?1GkR break; ,X4+i8Yc [-])$~WfW w={q@.
g% //count++; z'EQdQ) //if(count>4) %N*[{j= ^ // siteStop(); i[!|0U`p } J rx^ )8@- j Q5 F} System.err.println("文件下载结束!"); zjQ746<&)i } r ;RYGLx catch(Exception e){e.printStackTrace ();} 4,I,f>V } H9/!oI1P? rx1u*L 9&n9J^3L //获得文件长度 ub-3/T public long getFileSize() [a2]_]E% { ]#)(D-i int nFileLength = -1; $r/$aq=K try{ }qn>#ETi URL url = new URL(siteInfoBean.getSSiteURL()); .N X9Ab HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G%
tlV&In httpConnection.setRequestProperty("User-Agent","NetFox"); $[>{s9E N PT-d @7twe;07r int responseCode=httpConnection.getResponseCode(); -tj#BEC[H( if(responseCode>=400) k$3pmy* { JU?;Kq9R processErrorCode(responseCode); .9nqJ7] return -2; //-2 represent access is error yE8D^M|g } u}@N
Qeg ba|xf@=& K81X32Lm' String sHeader; d`^3fr'.4A J:@gmo`M;V )D+BvJ Y" for(int i=1;;i++) $ZM'dIk? { #n>U7j9`O //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .G{cx=; //Utility.log(in.readLine()); .l1x~( sHeader=httpConnection.getHeaderFieldKey(i); ?+t;\ if(sHeader!=null) ys9:";X;} { >dl5^ if(sHeader.equals("Content-Length")) 4YfM.~
6 { T+Z[&| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4$xVm,n|
break; (U:-z=E#1 } cRLw)"| } ,HZ%q]*:~ else |?T=4~b
break; u cpU$+ } w2
Y%yjCV } DBAyc# catch(IOException e){e.printStackTrace ();} Hr?lRaV catch(Exception e){e.printStackTrace ();} A8'RM F1 sFpg 4 /_jrZO Utility.log(nFileLength); ET}Z>vU}+ 1K Fd
~U LYDiqOrx return nFileLength; 4 Ej->T. } TKB8%/_p \3JCFor/ 1/M^7Vb. //保存下载信息(文件指针位置) Tb i?AJa} private void write_nPos() YV.' L { *yhA8fJ try{ 1>Sfv|ZP, output = new DataOutputStream(new FileOutputStream(tmpFile)); )'+[,z ;s output.writeInt(nStartPos.length); 2;v:Z^& for(int i=0;i<nStartPos.length;i++) xX<f4H\' { "\o#YC // output.writeLong(nPos); w6vbYPCN output.writeLong(fileSplitterFetch.nStartPos); KuJ)alD;1 output.writeLong(fileSplitterFetch.nEndPos); h4`8C] }
S_P&Fv output.close(); <=.6Z*x+ } <2pp6je\0s catch(IOException e){e.printStackTrace ();} 6Z_V,LD9L catch(Exception e){e.printStackTrace ();} a|t~&\@ }
/a1uG]Mt w%]) RTmp$lV //读取保存的下载信息(文件指针位置) NXOXN]=c< private void read_nPos() %~Yo{4mHs { ;Nn( try{ v9f+ {Y%- DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); jEBn"]\D int nCount = input.readInt(); dmF=8nff nStartPos = new long[nCount]; q;eb nEndPos = new long[nCount]; #/YS for(int i=0;i<nStartPos.length;i++) kLgkUck8] { T?1BcY
nStartPos = input.readLong(); c(Dp`f, nEndPos = input.readLong(); n#X~"|U` } 4/(#masIL input.close(); eo]nkyYDP } A%D'Z85
- catch(IOException e){e.printStackTrace ();} !aT:0m$:9c catch(Exception e){e.printStackTrace ();} "@G[:(BoB< } {)qr3-EM# -}6ew@GE IW\^-LI. private void processErrorCode(int nErrorCode) _[6sr7H! { 3 yx[*'e$ System.err.println("Error Code : " + nErrorCode); sC3Vj(d!i } $ar^U m,HE4`g dj0%?g> //停止文件下载 9`f@"%h public void siteStop() $FPq8$V { { "]!zL bStop = true; 2^'Ec:|f for(int i=0;i<nStartPos.length;i++) irlFB#.. fileSplitterFetch.splitterStop(); D\Ez~.H XM\\Imw >w.;A%|N } Vlx.C~WYn } }TTghE! //负责部分文件的抓取 "l&SRX?g **FileSplitterFetch.java `rn/H;r!Z */ 89M'klZ package NetFox; Q/|.=:~FO FAM{p=t]HT Au2?f~#Fv import java.io.*; qx#M6\L! import java.net.*; YrL(4 Nt8 UBL{3s^" `4K|L6 public class FileSplitterFetch extends Thread { F~Dof({: ,b5'<3\ t'2A)S String sURL; //File URL BH'*I
yv long nStartPos; //File Snippet Start Position qm=U<'b^ long nEndPos; //File Snippet End Position h3`}{
w int nThreadID; //Thread's ID !=YE hQ- boolean bDownOver = false; //Downing is over ?|ZbQz(bL boolean bStop = false; //Stop identical Ck/44Wfej FileAccessI fileAccessI = null; //File Access interface GFFwk4n1 7^i7U-A<A 'HWl_M public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException $NR[U+ { xb\EJ1M> this.sURL = sURL; ]T)N{"&N/ this.nStartPos = nStart; HO<|EH~lu this.nEndPos = nEnd; I(M/X/ nThreadID = id; uX-^9t fileAccessI = new FileAccessI(sName,nStartPos);//定位 =dQ[I6 } ,=+t2Bn
xgxfPcI `t/j6e] public void run() _*H Hdd5I { r|l?2 eO~ while(nStartPos < nEndPos && !bStop) \ ITd\)F%N { 1%_RXQVG i
bzY&f Phi5;U! try{ QD7KE6KP' URL url = new URL(sURL); =DdPwr 0Op HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M0$MK> httpConnection.setRequestProperty("User-Agent","NetFox"); %np(z&@wi String sProperty = "bytes="+nStartPos+"-"; "s|P,*Xf httpConnection.setRequestProperty("RANGE",sProperty); 3VLwY!2: Utility.log(sProperty); ?kR1T0lKkE 3zB'AG3b WVR/0l&bU InputStream input = httpConnection.getInputStream(); ~HIj+kN //logResponseHead(httpConnection); [7}3k?42X gnH{_ VzXVy)d byte[] b = new byte[1024]; 9]v,3'QI int nRead; <eXGtD while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) vb[0H{TT2 { '9!_:3[d\] nStartPos += fileAccessI.write(b,0,nRead); jSpj6:@B //if(nThreadID == 1)
V.{HMeE4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s?HK2b^;D } =0?5hxM d lo!pslqsn }Nr6oUn Utility.log("Thread " + nThreadID + " is over!"); XncX2E4E bDownOver = true; Z}t;:yhR //nPos = fileAccessI.write (b,0,nRead); *+*W# de. } ND1hZ3(^ catch(Exception e){e.printStackTrace ();} x\'3UKQP+^ } :6o%x0l } g?80>-!bF D _dv8 ,a&,R*r@& //打印回应的头信息 +(=-95qZ public void logResponseHead(HttpURLConnection con) ZP~H! { ZV--d'YiEm for(int i=1;;i++) m}z6Bbis 0 { Y$>NsgQn6 String header=con.getHeaderFieldKey(i); {>
,M if(header!=null) :h(RS ; //responseHeaders.put(header,httpConnection.getHeaderField(header)); [\3ZMH
* Utility.log(header+" : "+con.getHeaderField(header)); QcrhgR else /)kJ iV break; f_)# } EPJ>@A>;D } Ub\^3f .#~!w!T wb9(aS4 public void splitterStop() 4 xqzdR_ { SZT n=\ bStop = true; ~IYR&GEaUG } SZXSVz0j Ye]K 74M. ?5CE<[ } d;<'28A =COQv= GT qeFaY74S /* gbYM1guiD **FileAccess.java eyh}O *//文件访问(定位,写) ,y'6vW`%g9 package NetFox; aAe`o2Xs import java.io.*; ' Z#_"s#L f/c&Ya(D~ IuP~Vt{m public class FileAccessI implements Serializable{ z2{y<a9;? 8H-yT1
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 k={1zl ; RandomAccessFile oSavedFile; c*B< -
l<5 long nPos; q)9n%- YgP KDb j
C'3 L4B/
g)K public FileAccessI() throws IOException I!?Xq { 31c*^ZE. this("",0); ;Q,t65+Am } %\-E
R!b "f
89 ?\8 public FileAccessI(String sName,long nPos) throws IOException s<"|'~<n { X+sKG5nS oSavedFile = new RandomAccessFile(sName,"rw"); ,9d]-CuP; this.nPos = nPos; g_{N^wS oSavedFile.seek(nPos); ]B;`Jf } 5,p;b OQfFS+6 x#3*C|A public synchronized int write(byte[] b,int nStart,int nLen) !AJkd. { {H(l"KuL int n = -1; RtR@wZ2\s try{ ;8XRs?xyd oSavedFile.write(b,nStart,nLen); `1P|<VbZ n = nLen; 8#JX#<HEo } [u!n=ev catch(IOException e) zMA;1Na { \~A qA!)6 e.printStackTrace (); \8$~ i } g(tVghHxt$ 8Yk*$RR9 TaD;_)( return n; 1xEOYM) } NW5OLa")J< Jn=;gtD-* Ur]$@N } uarfH]T{ .,z6a b9X*2pnWJ /* 8>[g/%W **SiteInfoBean.java =MQ/z#:-P */ +Mijio package NetFox; \X&8EW tgG*k$8z Q*T'tkp public class SiteInfoBean { 3E*m.jX g=4^u* sq`Xz8u private String sSiteURL; //Site's URL Sj ~SG private String sFilePath; //Saved File's Path =W3
K6w private String sFileName; //Saved File's Name T%) E!:}v private int nSplitter; //Count of Splited Downloading File 7xeqs
q L>~Tc #}y8hzS$ public SiteInfoBean() VSY p {//nSplitter的缺省值为5 :+Ukwno?/ //default value of nSplitter is 5 A811VL^ this("","","",5); ` 'Qb?F6 } ?p@J7{a c$ZVvu {7goYzQsi% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 4Wiy2 { <v0`r2^S{- sSiteURL= sURL; RX>P-vp sFilePath = sPath; 0uDDaFS sFileName = sName; #gV n7wq this.nSplitter = nSpiltter; I2*rtVAP'j zw+aZDcV( >E+g.5
,:W } W#<1504ip 7m-% _aPAn|. public String getSSiteURL() =lJ
?yuc { /jGBQ-X return sSiteURL; @M"gEeI9 } ).5X )6)bI.BY !}TsFa public void setSSiteURL(String value) kh0cJE\_^ { 4uIYX sSiteURL = value; :_R:>n9 p } 12n:)yQy Y}c/wF7o :82h GU public String getSFilePath() *z0d~j*W; { Lg7A[\c
~ return sFilePath; EhHxB
fAQ } m]2xOR_ {=[>N>" e NIzI]~ public void setSFilePath(String value) ]X>yZec { l\s!A&L sFilePath = value; 0ae8Xm3J@R } Q>%n&;: [
/o'l: W91yj: public String getSFileName() 5X!-Hj
{ kMQ
/9~ return sFileName; yc]( } >Wr%usNxc d<a|dwAeh O{LCHtN public void setSFileName(String value) '}_r/l]K { -x//@8" sFileName = value; /WTEz\k } O]u'7nO{{ "Q.* S!b18|o" public int getNSplitter() s/D)X=P1 { .hat!Tt9 return nSplitter; "@UQSf, } vamZKm~p q\6(_U#Tl D`LBv,n public void setNSplitter(int nCount) B3#G { ! K>iSF< nSplitter = nCount; KMRPleF } sT\:** } 7<yc:}9nx LCHMh6 (wDE!H7 /* GI% &.V d **Utility.java F_
F"3'[ */ cszvt2BIg package NetFox; WUYI1Ij; 5}#wp4U ,S-h~x public class Utility { w"^h<]b 9"P|Csj dVQ[@u1, public Utility()
X06Lr!-% { I_J&>}V' [*',pG BR2Gb~#T }
po*G`b;v I^?tF'E //线程睡眠 kU<t~+ public static void sleep(int nSecond) l[}4
X/ { c2npma]DZ try{ tq3_az ~1 Thread.sleep(nSecond); ;m(iKwDt } C ^Y\?2h1 catch(Exception e) 8-2`S* { 4_R|3L e.printStackTrace (); w_(3{P[Iz }
THYw_]K } -R`{]7V YFO{i-*q //日志 YT\@fgBt public static void log(String sMsg) Z?axrGmg0 { hS]w
A"\87 System.err.println(sMsg); ~G!JqdKJ0 } YlHP:ZW-cu $coO~qvU X ,QsE{ public static void log(int sMsg) ,;)ZF { -#|D> System.err.println(sMsg); qA)OkR'm } cr1x
CPJj } ?%,NOX *G19fJ[5 m@4Dz| /* 6\4-I^=B **TestMethod.java \|;\ */ V
;T :Q% package NetFox; A6&*VD d#ir=+o{h !J`lA public class TestMethod { ZaFt4# O*EV~{K 6%v9o?:~l public TestMethod() Y=Vbs x { ///xx/weblogic60b2_win.exe %Y^J'' try{ oUv26t~ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); </h^%mnd //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %$!3Pbui SiteFileFetch fileFetch = new SiteFileFetch(bean); ag=d6q fileFetch.start(); t'qYM5 } :D.0\.p catch(Exception e){e.printStackTrace ();} GtA`0B .Mt3ec< TktH28tK } R@vcS=m7 kBu{ bxL oaoTd$/5 public static void main(String[] args) /R)wM#& { >[}oH2oi new TestMethod(); hx;f/EPx } OrY[ } ^Co-!jM 点击下载更多相关资料
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