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/* I:V0Xxz5t **SiteFileFetch.java F(#rQ_z] */ h0Z{,s} package NetFox; mnk"Vr` L import java.io.*; Z+`{ 7G?4m import java.net.*; ^[-el=oKn0 V}o n|A jeyLL< public class SiteFileFetch extends Thread { w6dFb6~R + 1IQYa| Z|9u]xL SiteInfoBean siteInfoBean = null; //文件信息Bean (}r|yE long[] nStartPos; //开始位置 P #F=c34u long[] nEndPos; //结束位置 ZlYPoOq FileSplitterFetch[] fileSplitterFetch; //子线程对象 SQ,?N
XZ long nFileLength; //文件长度 I2$T"K:eo boolean bFirst = true; //是否第一次取文件 /N>e&e[35\ boolean bStop = false; //停止标志 depYqYK7G File tmpFile; //文件下载的临时信息 ?; YC'bF DataOutputStream output; //输出到文件的输出流 C'=k<- plu$h-$d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;g_>
;tR/ public SiteFileFetch(SiteInfoBean bean) throws IOException Fhz*&JC# { ,
$Qo = siteInfoBean = bean; G'zF)0oD //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /:6Wzj tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jJ4qR:] if(tmpFile.exists ()) Ko&hj XHx { 5 )2:stT73 bFirst = false; WD;Y~| read_nPos(); `s '# } 5WqXo{S else Glq85S { &bqT/H18 nStartPos = new long[bean.getNSplitter()]; b5m=7;u*h nEndPos = new long[bean.getNSplitter()]; ]`g<w# } mDGn:oRj aw?=hXR! ;
UiwH p5O",3,A4 } {
74mf'IW 0w'j+ cH<q:OYi public void run() 8,O33qwH { 04J}UE]Ww //获得文件长度 E$a ?LFa6 //分割文件 B,z<%DAE //实例FileSplitterFetch ;v17K //启动FileSplitterFetch线程 k"kJ_( //等待子线程返回 z3t~}aL try{ 4E8JT#& if(bFirst) wn>edn { &`Y!;@K9W# nFileLength = getFileSize(); _ 46X%k if(nFileLength == -1) Z'^U ad6 { + SZYg[ System.err.println("File Length is not known!"); ^1:U'jIXO } 41#w|L
\ else if(nFileLength == -2) Md)zEj`\ { ~,D@8tv System.err.println("File is not access!"); x?x`oirh } FZd.L6q else j4FeSGa { ^^i6|l1 for(int i=0;i<nStartPos.length;i++) >Sa*`q3J { ""O" nStartPos = (long)(i*(nFileLength/nStartPos.length)); Nf+b"&Zh` } oRN-xng for(int i=0;i<nEndPos.length-1;i++) @=w<B4L { Bhqft;Nuh nEndPos = nStartPos[i+1]; *KK+X07 } NT%W;)6m9 nEndPos[nEndPos.length-1] = nFileLength; y#Ht{)C } EG'[`<*h } 8,?v?uE "Th$#3 v]2S`ffP //启动子线程 _2fkb=2@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; bLz*A- for(int i=0;i<nStartPos.length;i++) qZ@0]"h { @vgG1w fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !.7udYmB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5q{h 2).) nStartPos,nEndPos,i); u{&B^s)k. Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AJt!!crs fileSplitterFetch.start(); nU+tM~C%a } 4!$
M q;U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (VyNvB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J MX6yV // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", B;Nl~Y| \ nEndPos = " + nFileLength); "_L?2ta // fileSplitterFetch[nPos.length-1].start(); W]<$0 "Z,q?F c hf!|\f //等待子线程结束 R~L0{`
0 //int count = 0; L;_c|\% //是否结束while循环 {s,+^7 boolean breakWhile = false; KH KS$D '2J0>Bla P`$12<\O1 while(!bStop) oC*ees
g_ { z
`8cOK- write_nPos(); >: 0tA{bV Utility.sleep(500); P#kGX(G9! breakWhile = true; W:&R~R ~CRSL1? VCNT4m for(int i=0;i<nStartPos.length;i++) >(9F { <Pqv;WI|R if(!fileSplitterFetch.bDownOver) E
?2O( { @b&84Gn2
r breakWhile = false; ,reJ(s break; ]7sx;KFv } B,$l4m4 } \v@({nB8 if(breakWhile) PsjbR break; O[~x_xeW 4YG/`P /%x7+Rl\-^ //count++; ~yJ4qp- //if(count>4) *ck}|RhR // siteStop(); .;/L2Jv } &!.HuRiuC <T,A&`/ v vu<:16 System.err.println("文件下载结束!"); 8"'x)y } -Q
e~)7 catch(Exception e){e.printStackTrace ();} O0l^*nZ46t } W+>wu%[L aA*9, O>r-]0DI[ //获得文件长度 sOFa!bdPW public long getFileSize() Os),;W0w4 { n"{X!(RIcx int nFileLength = -1; dT@UK^\ try{ Qez SJ
io URL url = new URL(siteInfoBean.getSSiteURL()); u4'z$>B HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3*S[eqMJc httpConnection.setRequestProperty("User-Agent","NetFox"); R|,7d:k C?m,ta3 tn<6:@T
int responseCode=httpConnection.getResponseCode(); _j#SpL'P if(responseCode>=400) B+VuUt{S { w8M2N]&: processErrorCode(responseCode); NGzgLSm\ return -2; //-2 represent access is error e$l6gY } Rq)BssdF a<Uqyilm DQ6jT@ZDH String sHeader; 'w<BJTQIL gp )q^ Bj$ for(int i=1;;i++) ]
pPz@@xx { crmUrF# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); tB6k|cPC //Utility.log(in.readLine()); # mT]j"" sHeader=httpConnection.getHeaderFieldKey(i); mBl7{w;Iv if(sHeader!=null) /A(NuB<Pq { B4W\
t{ if(sHeader.equals("Content-Length")) |HbEk[?^s { (!zM\sF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :$H!@n*/R break; Ti= 3y497S } w=J4zkWk } F,}s$v else tHI*, break; p5*lEz|$ } ,b'4CF } TbNGgjT catch(IOException e){e.printStackTrace ();} K3ukYR catch(Exception e){e.printStackTrace ();} P^IY:
-s :,F=w0O MW@ DXbKVl Utility.log(nFileLength); Q=+8/b -<oZ)OfU DP>mNE return nFileLength; YFx=b!/s } .hN3`>*V epVH.u% zqGYOm$r //保存下载信息(文件指针位置) k>{-[X,/OV private void write_nPos() 8XbR { 79tJV try{ `Cj,HI_/* output = new DataOutputStream(new FileOutputStream(tmpFile)); t<lyg0f output.writeInt(nStartPos.length); O,9X8$5H-a for(int i=0;i<nStartPos.length;i++) N1?
iiv { v MWC(m // output.writeLong(nPos); kPJ~X0Fr{t output.writeLong(fileSplitterFetch.nStartPos); :&$Xe1)i] output.writeLong(fileSplitterFetch.nEndPos); cdsQ3o } nHU3%%%cU output.close(); >sV Bj(f } 8|<f8Z65! catch(IOException e){e.printStackTrace ();} Mcb<[~m catch(Exception e){e.printStackTrace ();} )/TVJAJ } wea\8[U3" 6QptKXu7 t^$Div_%G //读取保存的下载信息(文件指针位置) ^K>pT}u private void read_nPos() m?vAyi { D[W}[r try{ 2o}8W7y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SD I,M int nCount = input.readInt(); nK:`e9ES nStartPos = new long[nCount]; 9oD#t~+F4 nEndPos = new long[nCount]; I)uASfT$ for(int i=0;i<nStartPos.length;i++) ~p!QSRu~,b { "j;!_v>=f` nStartPos = input.readLong(); e)og4 nEndPos = input.readLong(); @f'AWeJ2 } Q,TaJ] input.close(); WFks|D:sB } +{bh catch(IOException e){e.printStackTrace ();} h!;MBn`8 catch(Exception e){e.printStackTrace ();} 3?6 Ber y= } w5=EtKTi .Px,=56$X '.xkn{c private void processErrorCode(int nErrorCode) (BhL/A 4 { 'jwTGT5x System.err.println("Error Code : " + nErrorCode); oPE.gn_$ } s={X-H< 2 :4b- sg# l9,w>]s //停止文件下载 m';|}z' public void siteStop() aGe \.A= { <C2c"=b bStop = true; sd7Y6?_C for(int i=0;i<nStartPos.length;i++) y& Gw.N}<r fileSplitterFetch.splitterStop(); U@MOvW) aw;{<?* <4S F~i } F\l!A'Q+t } +2f>
M4q //负责部分文件的抓取 .jy)>"h0 **FileSplitterFetch.java ^O?l9(=/u */ + 4++Z package NetFox; UeC 81*XZ AZ]Z,s6 P[r}(@0rJ import java.io.*; _y.mpX& import java.net.*; r7IhmdA Sqb#U{E @lmk e> public class FileSplitterFetch extends Thread { ,)Q mQ^/ 9Qkww&VEk ae^xuM?7 String sURL; //File URL d[S!e`,iD long nStartPos; //File Snippet Start Position f9&D1Gh+w long nEndPos; //File Snippet End Position i>rn!?b int nThreadID; //Thread's ID dIf Jr}ih boolean bDownOver = false; //Downing is over L@2H>Lh35 boolean bStop = false; //Stop identical s0`uSQ2X FileAccessI fileAccessI = null; //File Access interface ct]5\g?U' *3k~%RM%? w?5b: W, public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException D~%cf { d+IPa<N this.sURL = sURL; .oe,#1Qh{ this.nStartPos = nStart; zO+nEsf^O this.nEndPos = nEnd; Ny~;"n nThreadID = id; " 7aFVf fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]c5Shj5|p } vx
,yz+yP $@U`zy"Y .:;i* public void run() 2GD%=rP2] { F(w>lWs; while(nStartPos < nEndPos && !bStop) 3!}#@<j
{ g=%W"v I#,,h4C V]<dh|x try{ wHY;Y-(ZT URL url = new URL(sURL); Xr~r`bR= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #
I<G:) httpConnection.setRequestProperty("User-Agent","NetFox"); w"sRK String sProperty = "bytes="+nStartPos+"-"; hyBSS,I httpConnection.setRequestProperty("RANGE",sProperty); :*8@MjZ4 Utility.log(sProperty); <8y8^m`P9 C
qxP@ xA-G&oC]<T InputStream input = httpConnection.getInputStream(); I{2e0 //logResponseHead(httpConnection); lz>5bR' VJNPs6 QvqBT byte[] b = new byte[1024]; #._!.P int nRead; H`".L^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Zc"]Cv( { 8"4`W~ 3 nStartPos += fileAccessI.write(b,0,nRead); d82IEhZ# //if(nThreadID == 1) R<wb8iir // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;;U2I5 M7 } aE;!mod \/,SH?>4x Qr0GxGWU Utility.log("Thread " + nThreadID + " is over!"); ~\Ynih bDownOver = true; |M0TG //nPos = fileAccessI.write (b,0,nRead); ~svu0[Vx } Pq`4Y
K catch(Exception e){e.printStackTrace ();} L@+j8[3BX } GY4yZa } Ig6s'^ 2/bck)p= 5H',Bm4- //打印回应的头信息 WUxr@0 public void logResponseHead(HttpURLConnection con) > Euput\ { =N3~2=g~A for(int i=1;;i++) '-*r&: { Llzowlf e String header=con.getHeaderFieldKey(i); 'fgDe if(header!=null) f.u{;W //responseHeaders.put(header,httpConnection.getHeaderField(header)); "=RB
# Utility.log(header+" : "+con.getHeaderField(header)); 0xjV*0?s else 6Z'zB&hM} break; w%$n)7<* } Dp'/uCW) } H;Bj\-Pa X `vDhfh>N 7>4t{aRf_8 public void splitterStop() !YoKKG~_0 { pu^1s#g8w bStop = true; J5\> 8I,a } g-]td8}# 4$;fj1!Z: 5<S1,u5 } n|F`6.G PJ_|=bn .p5*&i7 /* ^8\pJg_0 **FileAccess.java >B9rr0d0 *//文件访问(定位,写)
o]FQ)WRB package NetFox; mHhm~u import java.io.*; *r_.o;6 44]ae~@a $~2Ao[ public class FileAccessI implements Serializable{ *[jaI-~S 'R$~U?i8 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Hnaq+ _] RandomAccessFile oSavedFile; Z86[sQBg long nPos; ]F_u Wl,yznT E^qKkl public FileAccessI() throws IOException *7Mrng { c=K M[s. this("",0); Zw3|HV(so } EUNG&U c]O4l2nCL fpqKa r public FileAccessI(String sName,long nPos) throws IOException iGp@P=;m { \gzNMI* oSavedFile = new RandomAccessFile(sName,"rw"); -8TLnl~[ this.nPos = nPos; <k)rfv7 oSavedFile.seek(nPos); C2VZE~U+ } MdPwuXI t EN%mK 6tJM*{$$H public synchronized int write(byte[] b,int nStart,int nLen) )h/fr| { =EG[_i{r int n = -1;
[g/g(RL try{ @Wv*` oSavedFile.write(b,nStart,nLen); %>s y`c n = nLen; :jhJpm1Xq } 7<)
.luV catch(IOException e) xOt|j4 { ?$gEX@5h e.printStackTrace (); mbd@4u } Lkb?,j5 ;+5eE`]a/L Kg%_e9nj# return n; YlYTH_L>E } 1M+mH#? Aw5yvQ>]e :JOF!Q } S |B7HS5 tIRw"sz '91Ak,cWB /* Bkcs4 x **SiteInfoBean.java Vdjca:` */ vm Hf$rq package NetFox; jbG #__#_ FkRrW^?5G 0R; ;ou public class SiteInfoBean { ~UL;O\-b0 ;Neld #%J No h*1u* private String sSiteURL; //Site's URL khyVuWN
private String sFilePath; //Saved File's Path "d{ |_Cf private String sFileName; //Saved File's Name WyO10yvR private int nSplitter; //Count of Splited Downloading File :V >Z|?[*H Xp%JPI { `i<U;?=0' public SiteInfoBean() _RAPXU~ 6- {//nSplitter的缺省值为5 zHyM@*Gf( //default value of nSplitter is 5 %SIbpk% this("","","",5); pvcD
61, } _57i[U r XC~|{d 9CxU:;3 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) X\uN:;?#W{ { sN;xHTY sSiteURL= sURL; hg |DpP sFilePath = sPath; \]GBd~i< sFileName = sName; GsxrqIaD this.nSplitter = nSpiltter; f7\$rx %[5hTf Ij4oH } r
5:DIA! PjDYdT[ |&3[YZY public String getSSiteURL() L_Ff* { +Y6=;*j$
return sSiteURL; 3u_[=a } 6gNsh yd'>Mw 7$Jb"s public void setSSiteURL(String value) A+_361KH { Nxp7/Nn3 sSiteURL = value; n~@;[=o?5 } H)ud?vB6 ( hp 52Vse V+(1U|@~
public String getSFilePath() %`?IY < { JgEPzHgx return sFilePath; %
tT L } il|e5TD^ -c{O!z6sX OWx-I\: public void setSFilePath(String value) &s-iie$"@x { yb\T<* sFilePath = value; Y23- Im } F0(P2j m&a.i
B P%2aOsD0 public String getSFileName() #ue WU {
\,&,Q return sFileName; 6V-u<FJ } E^qJ5pr_P y(^t &tgjS Y7vUdCj public void setSFileName(String value) |Tv}leJF { tpPP5C{ sFileName = value; Vq-W|<7C= } 2@~.FBby7@ +-2o b90_m S#Q0aGj public int getNSplitter() 71b0MHNkvv { 08czP-)OZ return nSplitter; ~?#>QN\\c } nQ*9E|Vx C-h9_<AwJQ hQ7-m.UZw public void setNSplitter(int nCount) yzyBr1s { 3']a1\sy^ nSplitter = nCount; yxk:5L \A } X<8?># } {#` O'F> C GN=kQ )_C+\K* /*
}_mVXjF **Utility.java PaD6||1F */ b!p]\B! package NetFox; S4 j5- &u+l`F^Z ES}V\k*} public class Utility { C]EkVcKFA yE&WGpT - f?8O6e public Utility() 0 i'bo* { ]SC|%B_* I=[Ir8}; HVd y!J } ='vD4}"j J8'1 ~$6 //线程睡眠 `- HI)-A97 public static void sleep(int nSecond) x{O) n { 9r.h^ try{ _`I}"`2H Thread.sleep(nSecond); %}IrZrh } 5,\-; catch(Exception e) ))%f"=:wt { bey:Qj?? e.printStackTrace (); {^D; ($lm } wrQ02? } Q7.jSL6 8NkyT_\ //日志 KpBOmXE public static void log(String sMsg) XJ!?>)N . { " Tk, System.err.println(sMsg); C$0rl74Wi } sYhHh$mwA %[, R Q">v Mkh/+f4 public static void log(int sMsg) s~QIs { l 88n*O System.err.println(sMsg); bY-koJo } D<hX%VJ%M } >V?W_oM) ^7uXpqQBr Im?/#t X /* GEvx<: **TestMethod.java [+d~He */ sib/~j package NetFox; b<!' WpY- tPa(H; ]x).C[^ public class TestMethod { b*W,8HF 4, a~ RY 8s u -)ED public TestMethod() _Ss}dU9 { ///xx/weblogic60b2_win.exe "n{';Q) try{ qzNXz_#+u SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]c v/dY# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9B![l=Gh SiteFileFetch fileFetch = new SiteFileFetch(bean); e_-7,5Co fileFetch.start(); 5t-d+vB } eIy:5/s catch(Exception e){e.printStackTrace ();} ePZAi"k [ #ih
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K+ AFM+`{Cq skXzck public static void main(String[] args) tAo$;| { $0x+b!_l@ new TestMethod(); ~%lA!tsek } 8KN3|) } R:(i}g<3 点击下载更多相关资料
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