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/* 4!14:mq **SiteFileFetch.java & *tL)qKDc */ =9TwBr.CJ package NetFox; DD/B\ import java.io.*; `Fcr`[ import java.net.*; [+FiD 1Z 0Qkd( <<
=cZ.HP public class SiteFileFetch extends Thread { hXFT(J= xjBY6Ylz 1E$\&*( SiteInfoBean siteInfoBean = null; //文件信息Bean vcW(?4e long[] nStartPos; //开始位置 ZeG4z({af long[] nEndPos; //结束位置 UD14q~ (1Z FileSplitterFetch[] fileSplitterFetch; //子线程对象 =m<b+@?T long nFileLength; //文件长度 io\t>_ boolean bFirst = true; //是否第一次取文件 EkV#i
boolean bStop = false; //停止标志 :Xy51p`.;] File tmpFile; //文件下载的临时信息 NcbW"Qv3 DataOutputStream output; //输出到文件的输出流 Z>UM gu3c (6/aHSXI //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) C_3,|Zq?| public SiteFileFetch(SiteInfoBean bean) throws IOException ,#N}Ni: { ~NE`Ad.G siteInfoBean = bean; e
6wevK\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @ddCVxd tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @D[+@N if(tmpFile.exists ()) K!AA4!eUzM { h}|.#!C3 bFirst = false; uj)vh read_nPos(); Iep_,o.Sk } u~,hTY(% else 0B[~j7EGO
{ G5|nt#> nStartPos = new long[bean.getNSplitter()]; v~x`a0 nEndPos = new long[bean.getNSplitter()]; F,as>X# } cGs&Kn;h pzt<[; _x|R`1` :CqR1_n% } E<D^j^T N[-$*F,:_ J:)ml public void run() HjzAFXRG { 3w>1R>7 //获得文件长度 C/
VHzV%q //分割文件 gc I<bY //实例FileSplitterFetch i{9.bpp/ //启动FileSplitterFetch线程 N
G vb] //等待子线程返回 ZUj1vf6I try{ \0Xq&CG=E if(bFirst) -+i7T^@| { -p0*R<t nFileLength = getFileSize(); oR%cG"y if(nFileLength == -1) HoX={^aG% { $ r-rIW5\ System.err.println("File Length is not known!"); djoP`r } 4h?@D_{k else if(nFileLength == -2) CXGMc)#>f { [T9]q8" System.err.println("File is not access!"); C[{E8Tg/ } Za?BpV~ else KXz7l\1Gb { 7Ou]!AOhG for(int i=0;i<nStartPos.length;i++) A.yIl`'UP# { t(vyi nStartPos = (long)(i*(nFileLength/nStartPos.length)); *'?V>q, } 1}Guhayy for(int i=0;i<nEndPos.length-1;i++) GB Vqc!d { 3xRn nEndPos = nStartPos[i+1]; a;a1>1 } *yHz#u' nEndPos[nEndPos.length-1] = nFileLength; R4 b!?}d } *Cp:<Mnd } DGTE#?'( XL44pE
m 2zbn8tO //启动子线程 J!|R1 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; L)<~0GcP for(int i=0;i<nStartPos.length;i++) M%$ITE { h'GOO( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Myn51pczl siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), F(/Ka@
nStartPos,nEndPos,i); eC<?g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S&&QU# fileSplitterFetch.start(); kZ6:=l } 1:yil9.\* // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #y"LFoJn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (i\{hq/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", OrL4G
`O nEndPos = " + nFileLength); Z6- // fileSplitterFetch[nPos.length-1].start(); YIIc@) ew,okRCN UHk)!P> //等待子线程结束 cM,g,E} //int count = 0; `2\:b^h //是否结束while循环 7$Wbf4 boolean breakWhile = false; ?MfwRWY ![4_K':= 4\ElMb[] while(!bStop) .=yv m { n``9H91 write_nPos(); #RyTa
/L Utility.sleep(500); ugj I$u breakWhile = true; 2[1t
)EW F.@|-wq& p1.3)=T for(int i=0;i<nStartPos.length;i++) B7Zi|-F { +~:OUR*> if(!fileSplitterFetch.bDownOver) b&Laxki { -2u)orWP breakWhile = false; 9D,!] break; 8N |K } +Y;hVcE9 } 1A*
"v if(breakWhile) "&`>+Yw break; m;1/+qs0 9s7TLT k 6Z=Qs=q //count++; e_l|32#/ //if(count>4) 7hLh} // siteStop(); >o3R~ [ } E{^W- a3A3mBw sk:B;.z System.err.println("文件下载结束!"); v>mK~0.$ } u"wWekB catch(Exception e){e.printStackTrace ();} %h,&N D } (F3R!n @A`j Wao c/j+aj0.v //获得文件长度 6kAGOjO public long getFileSize() @w(|d<5l:L { KLuOg$i int nFileLength = -1; z6,E}Y try{ e^x%d[sU URL url = new URL(siteInfoBean.getSSiteURL()); '.gi@Sr5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $-jj%kS httpConnection.setRequestProperty("User-Agent","NetFox"); DvLwX1(l qu'D"0 bI(8Um6m int responseCode=httpConnection.getResponseCode(); XWNo)#_3 if(responseCode>=400) 2AMb-&po&f { k!bJ&} Q(b processErrorCode(responseCode); 35x]' return -2; //-2 represent access is error
}J-e:FUF# } 1_;{1O+B *(5T?p[7 ~4twI*f String sHeader; C9""sVs darbL_1 Z.x]6 for(int i=1;;i++) <Ter\o5% { Jt<J#M<}7 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); C(8!("tU //Utility.log(in.readLine()); ?<\2}1 sHeader=httpConnection.getHeaderFieldKey(i); kkMChe};5 if(sHeader!=null) to1r
88X { 3` D[' if(sHeader.equals("Content-Length")) 1{a4zGE?[ { DWCf+4 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); suFk<^3 break; JBZ1DZAWC } 0jPUDkH* } 6V@_?a-K else zKaj<Og break; T5I#7LN# } 0V^I.S/q } B(} 'yY@%u catch(IOException e){e.printStackTrace ();} X8R:9q_ catch(Exception e){e.printStackTrace ();} Zu>-y#Bw Z#^|h0 JY;u<xl Utility.log(nFileLength); JR&yaOws -XK;B--c Ho[]03 return nFileLength; ]|=`-)AP3 } FgrVXb_q 7&%HE\ {X_I>)Wg //保存下载信息(文件指针位置) 9HlWoHuC private void write_nPos() a'n17d& { dV}]\8N try{ \1n (Jr.< output = new DataOutputStream(new FileOutputStream(tmpFile)); 9Nx%Sdu output.writeInt(nStartPos.length);
]w$cqUhM for(int i=0;i<nStartPos.length;i++) \d]Y#j< { $<&_9T#&w // output.writeLong(nPos); G%zJ4W% output.writeLong(fileSplitterFetch.nStartPos); UWK|_RT6SA output.writeLong(fileSplitterFetch.nEndPos); kCoE;)y$ } _IV!9 JL output.close(); q"DHMZB } z}Us+>z+jc catch(IOException e){e.printStackTrace ();} #T{)y catch(Exception e){e.printStackTrace ();} ^Oeixi@f } v]H9`s#, MA}}w& >LN*3&W //读取保存的下载信息(文件指针位置) ._<,
Eodv private void read_nPos() s1#A0%gx { bKzG5|Qu try{ D&G?Klq DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #Ak|p#7 ^ int nCount = input.readInt(); 1wdc4> nStartPos = new long[nCount]; ' u;Zw%O(J nEndPos = new long[nCount]; qdmAkYUC for(int i=0;i<nStartPos.length;i++) yJ ljCu)f { SyT{k\[ nStartPos = input.readLong(); 8t)gfSG nEndPos = input.readLong(); 1w7XM0SHcn } %B1)m A; input.close(); "M\rO!f: } g>w {{G catch(IOException e){e.printStackTrace ();} ?E}gm> catch(Exception e){e.printStackTrace ();} )UTjP/\gN } ?$uF(>LD
_Ex<VF u w:iMrQeJg private void processErrorCode(int nErrorCode) r ?<kWR?w { Q>9bKP System.err.println("Error Code : " + nErrorCode); %X}vuE[[UC } 1;i|GXY:h 4GG>n ^;9l3P{ //停止文件下载 ur=:Ha public void siteStop() mW+5I-~ { 0 z]H= bStop = true; YktZXc?iI< for(int i=0;i<nStartPos.length;i++) j72mm! fileSplitterFetch.splitterStop(); VlSM/y5 jvD_{r z 0zB&} } )PYh./_2 } Gm9 //负责部分文件的抓取 9ZatlI, **FileSplitterFetch.java J4U_utp */ G51-CLM, package NetFox; Tp.]{* .3V L @p}_"BHYWt import java.io.*; %hw4IcWJ| import java.net.*; 9^`cVjD5 &,:!gYN >&R@L KP public class FileSplitterFetch extends Thread { *//z$la `kv7Rr}Q \/gf_R_GN String sURL; //File URL U>bIQk"4 long nStartPos; //File Snippet Start Position 'irwecd8 long nEndPos; //File Snippet End Position `
"-P g5 int nThreadID; //Thread's ID skTaIGRL boolean bDownOver = false; //Downing is over r$'.$k\ boolean bStop = false; //Stop identical ]@Z
nP,8 FileAccessI fileAccessI = null; //File Access interface ,O:p`"3`0= 1ah,Zth2 @,;h!vB*= public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException m|x_++3 { |`Yn'Mj8rm this.sURL = sURL; {Oq8A.daJ this.nStartPos = nStart; "UhE'\() this.nEndPos = nEnd; A
#m _w* nThreadID = id; 8t, &dq fileAccessI = new FileAccessI(sName,nStartPos);//定位 RW1+y/#%P } T5e#Ll/ R^sgafGl= )Y'g; public void run() ZNk[Jn
[. { {hN<Ot while(nStartPos < nEndPos && !bStop) !7Qj8YmS { IR:{ { ( I@O9bxR? 8'bZR] try{ JC~4B3! URL url = new URL(sURL); Mqk|H~l5c HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M"{*))O\-c httpConnection.setRequestProperty("User-Agent","NetFox"); tq@)J_7| String sProperty = "bytes="+nStartPos+"-"; e Y^zs0 httpConnection.setRequestProperty("RANGE",sProperty); F2_'U' a Utility.log(sProperty); <exyd6iI >SziRm>Y7 ^`aw5 +S InputStream input = httpConnection.getInputStream(); \ Ucv<S //logResponseHead(httpConnection); =2DK?]K; '+j;g tlg}"lY byte[] b = new byte[1024]; u2$.EM/iae int nRead; aaN/HE_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .3n\~Sn { ydY 7 :D nStartPos += fileAccessI.write(b,0,nRead); $UK m[:7 //if(nThreadID == 1) |22vNt_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `'EG7 } tl7:L> ^;( dF<?'r 4b`Fi@J\ Utility.log("Thread " + nThreadID + " is over!"); =ud~ bDownOver = true; %hZX XpuO //nPos = fileAccessI.write (b,0,nRead); kq?:<!z } G/fBeK$. catch(Exception e){e.printStackTrace ();} }Y!s:w# } xN}f? } q@XJ,e1A w'$>E4\ (vzYgU, //打印回应的头信息 ~&F|g2: public void logResponseHead(HttpURLConnection con) _y>drvg { *<SXzJ( for(int i=1;;i++) yM9>)SE5` { ~UQ<8`@a String header=con.getHeaderFieldKey(i); 5!$sQ@#}D if(header!=null) v,ni9DIu //responseHeaders.put(header,httpConnection.getHeaderField(header)); O7LJ-M Utility.log(header+" : "+con.getHeaderField(header)); -b8SaLak else VYh/URU> break; (4yXr|to} } d7QUg6= } @(E6P;+{ GE=S.P; {%^4%Eco public void splitterStop() qxHn+O!h { m?Cb^WgcF bStop = true; Oj_F1.
r } )^4Ljb1 pr4y*!|Y$ -a~n_Z>_ } KU0Ad);e q(hBqU W 9kqR-T|Q /* \dE{[^.5 **FileAccess.java OK`^DIr5l *//文件访问(定位,写) PvjZoF[" package NetFox; `U\l: ~]e import java.io.*; UGgo;e KC2Z@ 9xw"NcL public class FileAccessI implements Serializable{ dBovcc 7^M$u\a)U //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V:P]Ved RandomAccessFile oSavedFile; |S@ long nPos; #8M^;4N>[ Z(R0IW hy%5LV<( public FileAccessI() throws IOException Vjo[rUW { :7obxW1X this("",0); =ONM#DxH } *mWl=J;u gN[t J]S30&? public FileAccessI(String sName,long nPos) throws IOException S*J\YcqSC { ]>k8v6*= oSavedFile = new RandomAccessFile(sName,"rw"); ycOnPTh this.nPos = nPos; #<sK3 PT oSavedFile.seek(nPos); !T
,=kh } !^0vi3I `Je1$)% QOrMz`OA public synchronized int write(byte[] b,int nStart,int nLen) g=qaq
{ /iQh'rp int n = -1; J>;r(j try{ `r3 klL,W' oSavedFile.write(b,nStart,nLen); bXXX-Xc n = nLen; gYk5}E- } ;YMg4Cs catch(IOException e) R ;A8y { ?P>4H0@I+ e.printStackTrace (); u#^l9/tl } iPWr- w{*V8S3h9 @o'L! 5Y return n; 9h)8Mq+M } :~srl)|) 3ZyvX]@_ v+79#qWK|n } c9CFGo?)N .;ofRx< jJt4{c /* CH|cK8q **SiteInfoBean.java 5M5vxJ)Lh */ |/%5~=%7 package NetFox; fB,eeT1v?h $ywROa] 9b,0_IMHH public class SiteInfoBean { 8tna<Hx /7p(%vr 41+WIa
L private String sSiteURL; //Site's URL l`:u5\ rM private String sFilePath; //Saved File's Path X%(NI(+x, private String sFileName; //Saved File's Name Ej6ho 0_ private int nSplitter; //Count of Splited Downloading File @)[8m8paV R)*l)bpZ# p$jAq~C public SiteInfoBean() _JTK$\ {//nSplitter的缺省值为5 (aSuxl.Dq //default value of nSplitter is 5 zF{~Md1 this("","","",5); K`<HZK } WwtVuc| wpi$-i` P6ktA-Hv> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) f5un7,m { R2C~.d_TDu sSiteURL= sURL; .7 LQ l? sFilePath = sPath; d]^m^ sFileName = sName; _~C1M&b(X3 this.nSplitter = nSpiltter; *!*%~h8V XE2rx2k .oTS7rYw } t)?K@{ 9 Y`4 LMK[] J=: \b public String getSSiteURL() |s(Ih_Zn { 6J}Yr5oD return sSiteURL; 6vps`k$,~ } nHq4f&(H +,$pcf<[V KfZb=v;-l public void setSSiteURL(String value) YX)Rs
Vf { r@vt.t0# sSiteURL = value; XOI"BLd } )rAJ>; .j^BWr T{m) = (q public String getSFilePath() $0un`&W { nTwJR return sFilePath; 8Lx1XbwK } "$o>_+U
qnWM %k -OU{99$aS public void setSFilePath(String value) (y&sUc9 { B9$f y).Gp sFilePath = value; 'kY/=*=Q } /
j%~#@ Meep *l"CIG' public String getSFileName() zn&ZXFgN { ePJ_O~c return sFileName; GbZ~eI`,2 } WcY_w`*L 42 lw>gzr! zy"k b public void setSFileName(String value) L]!![v.VY { #ley3rJW] sFileName = value; !!V1#?0jw } -Q
JP J. v7KBYN {7]maOg>7J public int getNSplitter() *)
T"-}F { v@q&B|0 return nSplitter; .|hsn6i/- } |3T2}oh rr [+R_3'aK 1i~q~O, public void setNSplitter(int nCount) pOn &D { hxM{}}.E nSplitter = nCount; b)e;Q5Z(. }
zp}pS2DU } ]adgOlM "-X8 s2|.LmC3|B /* S1Od&v[R **Utility.java K?!W9lUq */ _E'}8.#{ package NetFox; V]+y*b.60 cHT\sJo`l y {Bajil public class Utility { 6jgP/~hP>N "9QZX[J|* \ ~+b& public Utility() !uIY , { vWM&4|Q1~ 0,0Z!-Y ,Zb } A[7H-1- TlkhI //线程睡眠 kp<Au)u public static void sleep(int nSecond) 2YY4 XHQS { qpCaW0]7 try{ aQ\SV0PI Thread.sleep(nSecond); h%W,O,K/ } ji\LC%U- catch(Exception e) r nr-wUW@ { mTWd+mx e.printStackTrace (); )8#-IXxp } #5{xWMp/0 } KU
oAxA >bQOpGy}l //日志 c*E7nc)u public static void log(String sMsg) \mJR^t { ~1}fL 1~5 System.err.println(sMsg); D86F5HT}} } U\qbr.< b1i~F45h e Ru5/y~ public static void log(int sMsg) HK<S|6B7V { u pUJF`3 System.err.println(sMsg); 26k~Z} } O#18a,o@ } &g23tT#P? Fv
%@k{ gzSm=6Qw0 /* ocK4Nxs **TestMethod.java Ij.mLO] */ u t4:LHF package NetFox; K39I j_3 /.!&d^ >yP>]r+ public class TestMethod { F02TM#Zi O|=?!|`o @d|Sv1d% public TestMethod() (2L,m { ///xx/weblogic60b2_win.exe C(B"@ try{ Q$]1juqg SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); GBRiU&D //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); /|UbYe, SiteFileFetch fileFetch = new SiteFileFetch(bean); oPa oQbR(A fileFetch.start(); +4T.3Njjn } F}meKc?a catch(Exception e){e.printStackTrace ();} hrzxc4,W >yT1oD0+x ^q/^.Gf } ,P`G IGvkA ^b|? ?9& +MaEet public static void main(String[] args) GeB&S!F { ?f'`b<o new TestMethod(); Et-|[ eL } jCNR63/ } Nb_Glf 点击下载更多相关资料
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