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/* o1FF"tLkN **SiteFileFetch.java *Df,Ijh $ */ \E%'Y package NetFox; E
,|xJjh import java.io.*; )6|yb65ZUX import java.net.*; S"OR% rdJ d#S 1n:8s'\ public class SiteFileFetch extends Thread { ?<(m
5Al7 [^U#Qj)hL lzYnw)Pv SiteInfoBean siteInfoBean = null; //文件信息Bean 6P5Ih
long[] nStartPos; //开始位置 *:L?#Bw long[] nEndPos; //结束位置 Z; A`oKd FileSplitterFetch[] fileSplitterFetch; //子线程对象 /4`
0?/V long nFileLength; //文件长度 YwZ
Z{+n boolean bFirst = true; //是否第一次取文件 @+ BrgZv` boolean bStop = false; //停止标志 ?q;Fp File tmpFile; //文件下载的临时信息 .zn;:M#T DataOutputStream output; //输出到文件的输出流 Db;G@#x v(EEG/~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (&+kl q public SiteFileFetch(SiteInfoBean bean) throws IOException 0Sgaem` { uWM{JEOl siteInfoBean = bean; 8;Yx<woR //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); b+f'[; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mxz-4. if(tmpFile.exists ()) 0el9&l9Ew { &8] d }-e bFirst = false; ++V=s\d7 read_nPos(); +;#Y]xy: } 7tcPwCc{ else Kd=%tNp { ],Rd ySN& nStartPos = new long[bean.getNSplitter()]; K)\M5id] nEndPos = new long[bean.getNSplitter()]; " e}3:U5n } rfNm&!K Mi/&f WnGGo'Z 2UFv9 } )e a :Q? (Nx;0"5IX 49w=XJ public void run() Ee3hG2d` { op6CA "w //获得文件长度
*X,
/7C
//分割文件 @ ]/AjjLt //实例FileSplitterFetch A@sZ14+f //启动FileSplitterFetch线程 |m80]@> //等待子线程返回 XI9js{p try{ uwjGDw if(bFirst) *{yK
8 { /ig:9R nFileLength = getFileSize(); []A%<EI7 if(nFileLength == -1) /k<WNZM { C\di 7 z: System.err.println("File Length is not known!"); !kE-_dY6) } ;ByOth|9P else if(nFileLength == -2) /6h(6 *JI { hrhb!0 System.err.println("File is not access!"); Xt#4/>dlR } qt;y2gf= else Hrz f'a|^ { #_(jS+lP?k for(int i=0;i<nStartPos.length;i++) 5JLu2P { #:^YI
c nStartPos = (long)(i*(nFileLength/nStartPos.length)); -$WYj" } l?Fb ='# for(int i=0;i<nEndPos.length-1;i++) @)-$kk* { y^}6!>Ou: nEndPos = nStartPos[i+1]; 5<ux6,E1{ } j'BMAn ? nEndPos[nEndPos.length-1] = nFileLength; m
q{]; } rORZerM } d\ ~QBr? dVFf. =<NljOR4` //启动子线程 *H.oP fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yZ7,QsEsN for(int i=0;i<nStartPos.length;i++) Hf vTxaK { Ie4 hhW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S}ECW,K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]f_6 '|5A nStartPos,nEndPos,i); 9>g, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W"k8KODOY fileSplitterFetch.start(); Ce")[<: } 6'RrQc=q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gF5a5T, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Tp9-niW // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |)K]U nEndPos = " + nFileLength); IrWD%/$H // fileSplitterFetch[nPos.length-1].start(); S -'fS2 gW1b~(
fD %0mMz.f //等待子线程结束 [_.5RPJP8 //int count = 0; mUz\ra;z //是否结束while循环 K
a(J52 boolean breakWhile = false; #~.w&~: !Wy[).ZAf O=dJi9;`#_ while(!bStop) A6pjRxg { LI6hEcM= write_nPos(); Wf&W^Q Utility.sleep(500); BZXUwqEh breakWhile = true; =T7A]U] 4)<~4 ' (Gw,2-A for(int i=0;i<nStartPos.length;i++) }Iz7l{al { _+^ 2^TW if(!fileSplitterFetch.bDownOver) S9>0t0 { =l0Jb#d breakWhile = false; }QsZ:J. break; 2d {y M(=( } sqS=qC } fz3lV if(breakWhile) ~35U]s@v break; /2HN>{F^Y ?l $Nf@- 7zv1wb //count++; ]+m/;&0 //if(count>4) m/@<c'i // siteStop(); 9Y<#=C } ]d]JXt?)i UEzb^(8> ,E$@=1) System.err.println("文件下载结束!"); _C+b]r/E } XbZ*& catch(Exception e){e.printStackTrace ();} 60)iw4<wf } hAjM1UQ,Y }irn'`I bC3 F //获得文件长度 4ON_$FUe public long getFileSize() _ %x4ty { ]Y| 9?9d int nFileLength = -1; s #S%#LM try{ vc]cNz:mQ URL url = new URL(siteInfoBean.getSSiteURL()); *\o/q[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1<h>B: httpConnection.setRequestProperty("User-Agent","NetFox"); Vm|Y$C {"
4e+y ad_`x int responseCode=httpConnection.getResponseCode(); \6 93kQ if(responseCode>=400) ee/&/Gt { 2EK%N'H processErrorCode(responseCode); $
A9%UhV return -2; //-2 represent access is error f(eQ+0D } nWvuaQ0} V&|!RxWK rJ o"fx String sHeader; /2m?15c+ LsM7hLy 6y5A"- for(int i=1;;i++) thqS*I'#g { NKmoG\* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); R+~cl;#G6 //Utility.log(in.readLine()); %,iIpYx sHeader=httpConnection.getHeaderFieldKey(i); 62>zt2= if(sHeader!=null) P\&! ] { KHDZ if(sHeader.equals("Content-Length")) a@pz*e { )kJH5/ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 0'r%,0 break; l6u&5[C } _NcYI } oiH|uIsqR else #DjCzz\ break; [,aqQ6S } JNFIT;L } BvU"4d;x catch(IOException e){e.printStackTrace ();} j2Pn<0U catch(Exception e){e.printStackTrace ();} 1'4J[S\cM nCKbgM'" gs
W0 Utility.log(nFileLength); YUdxG/~' NA.1QQ;e T`9-VX;` return nFileLength; TFepxF } CVi`bO 4\
YOAn4]j c:l]=O //保存下载信息(文件指针位置) 3?E&}J<n private void write_nPos() yxBUj*3 { #2:a[
~Lf try{ jb /8?7 output = new DataOutputStream(new FileOutputStream(tmpFile)); /"ymZI!k\ output.writeInt(nStartPos.length); F#{gfh for(int i=0;i<nStartPos.length;i++) (Bo bB]~a { ;p ]y)3 // output.writeLong(nPos); w&BGJYI output.writeLong(fileSplitterFetch.nStartPos); ntP|\E output.writeLong(fileSplitterFetch.nEndPos);
-~4+w } SjdZyJa output.close(); R1-k3;v^ } J@9}`y=K catch(IOException e){e.printStackTrace ();} ~^vC,]hU catch(Exception e){e.printStackTrace ();} -K[782Q } p[2GkP jvVi%k b8f+,2Tk //读取保存的下载信息(文件指针位置) htPqT,L private void read_nPos() ^I]{7$6^ { #'hLb try{ a9~"3y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :h:@o h_= int nCount = input.readInt(); somfv$'B nStartPos = new long[nCount]; )uLr?$qe nEndPos = new long[nCount]; 9B+wYJp for(int i=0;i<nStartPos.length;i++) +/?iCmW { s~},y]YV nStartPos = input.readLong(); E-1"+p nEndPos = input.readLong(); ^UA(HthY } ]Fb0Az input.close(); %TrF0{NR90 } xiyxrR; catch(IOException e){e.printStackTrace ();} \O7J=6fn catch(Exception e){e.printStackTrace ();} XV'fW~j\ } 89cVJ4]g~! !~lW3 l>v{ private void processErrorCode(int nErrorCode) *wi}>_\ { Q;nAPS System.err.println("Error Code : " + nErrorCode); mo1
puU } >m_v5K dZ:r&Qa c#b:3dXx9 //停止文件下载 \%,&~4
! public void siteStop() Y~n`~( { fn9#>~vrD bStop = true; s%;<O:x8o for(int i=0;i<nStartPos.length;i++) "D*Wi7 fileSplitterFetch.splitterStop(); &B!%fd.' w5]l1}rl :k46S<RE } %d: A`7x } A2x;fgi //负责部分文件的抓取 3z{S}~ **FileSplitterFetch.java ?kt=z4h9( */ jnoL2JR[=- package NetFox; 30FykNh ~_ !ts{[E Xz;b,C&*t import java.io.*; .F0]6#( import java.net.*; a%hGZCI >Csbjf6 ^Y^"'" public class FileSplitterFetch extends Thread { c!&Qj {@M14)-x>_ FQf#* String sURL; //File URL Xy#VQ{! long nStartPos; //File Snippet Start Position JZ`L% long nEndPos; //File Snippet End Position .#^0pv! int nThreadID; //Thread's ID xKp0r1} boolean bDownOver = false; //Downing is over |0{ i9.= boolean bStop = false; //Stop identical Kla:e[{ FileAccessI fileAccessI = null; //File Access interface um8AdiK R9.HD?H@
U
5`y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @~jxG%y86 { ~uPk this.sURL = sURL; > zL|8f this.nStartPos = nStart; ~Sy-gaJ this.nEndPos = nEnd; I{dl% z73 nThreadID = id; i=QqB0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 +Z?[M1g } 6b:DJ ~HP
LV eX<K5K.B public void run() ;.Zh,cU { N4 [E~- while(nStartPos < nEndPos && !bStop) :$"7-a%f { R'EW7}& U($^E}I2( GhnE>d;i try{ $P?{O3:V URL url = new URL(sURL); o_yRn16 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xQz#i-v httpConnection.setRequestProperty("User-Agent","NetFox"); ^now}u9S6 String sProperty = "bytes="+nStartPos+"-"; A9BxwQU# httpConnection.setRequestProperty("RANGE",sProperty); @;9()ad Utility.log(sProperty); xbC~C~# *1;23BiH- #J+\DhDEPO InputStream input = httpConnection.getInputStream(); ^`&HWp //logResponseHead(httpConnection); |t\KsW ci7~KewJ* _hoAW8i byte[] b = new byte[1024]; 0]a1 5 int nRead; u~71l)LA while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'P/taEi=R { a!.!2a&t nStartPos += fileAccessI.write(b,0,nRead); ;4d.)-<No_ //if(nThreadID == 1) *IlQ5+3I // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yv${M u } 0^>E`/ v:P!(`sF hCLk#_ Utility.log("Thread " + nThreadID + " is over!"); TczXHT}G bDownOver = true; GUCM4jVT^ //nPos = fileAccessI.write (b,0,nRead);
d]k=' } zXgkcq) catch(Exception e){e.printStackTrace ();} #D:RhqjK } |!re8|JV_ } \|!gPc%s /:6Q.onmLn $f(agG] //打印回应的头信息 G4yUC<TqBP public void logResponseHead(HttpURLConnection con) 5TET<f6R { &V;x 4 for(int i=1;;i++) sUda
{ xL&PJ /' String header=con.getHeaderFieldKey(i); ^%zNa6BL if(header!=null) )b (X //responseHeaders.put(header,httpConnection.getHeaderField(header)); kt<@H11 Utility.log(header+" : "+con.getHeaderField(header)); #! @m y else g!`BXmW break; Q}z{AZ } 0(vdkC4\A } 7h1"^}M& M;@Ex`+?i |
W?[,|e public void splitterStop() i -V0Lm/ { -t b;igv bStop = true; aZ/yCS7 } *C/KM;& /T#o<D gDc]^K4> } SW-0h4 7`+UB>8 wKrdcWI,Z /* /p[y1 **FileAccess.java 7?]!Ecr" *//文件访问(定位,写) P59uALi package NetFox; c.6QhE import java.io.*; DsG !S* Vdy\4 nu( }Y$VB%&Hy public class FileAccessI implements Serializable{ q\G{]dz?R j>g9\i0O1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 +9}' s{ RandomAccessFile oSavedFile; 0, "ZV} long nPos; JSUzEAKe 2?pM5n R''Sfz>8 public FileAccessI() throws IOException ;>'SV~F { (aBP|rxg this("",0); 'iDu0LX } X{|k<^: SFOQM*H 'U*udkn 2] public FileAccessI(String sName,long nPos) throws IOException ?xf~!D { kz|[*%10 oSavedFile = new RandomAccessFile(sName,"rw"); )rS^F<C this.nPos = nPos; 2PI #ie4 oSavedFile.seek(nPos); b__n~\q_ } OT"lP(, ~CJYQFt cxk=|
?l public synchronized int write(byte[] b,int nStart,int nLen) "vvFq ,c { G)K9la<p int n = -1; !zl/0o try{ "9.6\Y\* oSavedFile.write(b,nStart,nLen); ~v,!n/(' n = nLen; hXBqz9 } @)06\h catch(IOException e) Q,O]x# { <6gU2@1 e.printStackTrace (); M`q#,Y?3^I } =I{S;md uJ7,rq :nTkg[49pJ return n; ud!r*E } C=M? FJ nG<5Rh MEDskvBG } AZ}%MA;q /}[zA@ ..]B9M. /* p$&_fzb **SiteInfoBean.java oF`-cyj" */
8APTk package NetFox; Rf&^th}TH HL|0 d
} >hh"IfIZ4 public class SiteInfoBean { mT}Aje-L v UJ sFR 5,g$|,Shv private String sSiteURL; //Site's URL `<bCq\+` private String sFilePath; //Saved File's Path =] 6_{#Z< private String sFileName; //Saved File's Name D_]i/
F% private int nSplitter; //Count of Splited Downloading File vs*_;vx %Tk}s fx I*%&)Hj~ public SiteInfoBean() gDgP;id {//nSplitter的缺省值为5 CA'hvXb. //default value of nSplitter is 5 P2s^=J0@ this("","","",5); `7+tPbjs } CAcOWwDm sz){uOI q|m#IVc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0R.Gjz*Q { ntd
":BKi sSiteURL= sURL; Nj"_sA
p sFilePath = sPath; ZzSJm+&' sFileName = sName; !NQf< ch this.nSplitter = nSpiltter; GIJV;7~ C%qtCk_cN `V$cz88b } ZhxfI?i)l =rE`ib $=QNGC2+ public String getSSiteURL() jCdZ}M($ {
9QO!vx return sSiteURL; a?f5(qW3 } e/ppZ> 5k_Mj*{6 Z.Lx^h+U public void setSSiteURL(String value) WcQZFtW { +K @J*W 1 sSiteURL = value; u^;sx/ } %6vMpB`g EC:x,i sP=2NqU3Q public String getSFilePath() BUboP?#%) { AF07KA# return sFilePath; Qt)7mf } t~udfOvY H znI R :5n"N5Go public void setSFilePath(String value) +$Ddd`J' { 4l#T_y sFilePath = value; SvCK;$: } w2RESpi
$Adp M?:f^ public String getSFileName() vs)HbQ { QB
oZCLv return sFileName; '3Y0D1`v } \^^hG5f 4%Z\G@0<' _dB0rsCnU% public void setSFileName(String value) 3L\s8O { O=9V X sFileName = value; (&a3v } \5v=pDd4g ({}O
M=_ !F}J+N=} public int getNSplitter() &'oacV= { 5Rt0h$_J return nSplitter; 1f bFNxo8M } ~]D\&D9=? (urfaZ;@+ Vtc)/OH public void setNSplitter(int nCount) *RqO3= { q#':aXcv" nSplitter = nCount; LU 5
`!0m } hBs>2u|z9 } K.sj"#D QL|:(QM E|6Z]6[ /* kcZ;SYosj **Utility.java :@z5& h */ *X=f package NetFox; \?Oly171 'KIi!pA. 4jZi62 public class Utility { jd*%.FDi{ PxCl]~v 9_CA5?y$: public Utility() 4<K ,w{I { LMhY"/hAXa #uDBF D ;T r } FZ'>LZ l%)=s~6z //线程睡眠 yvH#1F`{q public static void sleep(int nSecond) %<#$:Qb. { QP-<$P;~ try{ -EX3'
[*' Thread.sleep(nSecond); N_WA4?rB } \]d*h]Hms catch(Exception e) b~jvmcr { Rcm(Y7 e.printStackTrace (); h-v&I> } |jCE9Ve# } 2w.9Q
(Sn ]FnrbQ| //日志 7 +W?Qo public static void log(String sMsg) } k%\ { ~IN$hKg^ System.err.println(sMsg); yP=isi#dDY } {Z{NH:^ qh'f,#dI} H ]N/Y{ public static void log(int sMsg) rF
j)5~ { '<E8<bi System.err.println(sMsg); Xrzh*sp } <)*g7 } Q`wA"mw6k G cLp" NB yN}e /* 9j>sRE1 **TestMethod.java )9W#5V$ */ ~uD;_Y=u)r package NetFox; Q; /!oA_ V{^fH6;[ Zp(P)Obs# public class TestMethod { N55=&-p nN]vu 5FR#_}k]_F public TestMethod() y&I|m { ///xx/weblogic60b2_win.exe ;[\2/$- try{ Gw\HL SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r.G/f{=<@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); KD3To% SiteFileFetch fileFetch = new SiteFileFetch(bean); :?XHZ fileFetch.start(); eR
2T<7G } #dm@%~B{. catch(Exception e){e.printStackTrace ();} +(k)1kCMn q,>F#A' WD do{ } X}QmeY[0I (7#lN q^+NhAMz public static void main(String[] args) pvdZ>D-IU { HG6{`i new TestMethod(); jW0z|jr } =}o>_+" } \ A UtGP 点击下载更多相关资料
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