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/* !$98U~L **SiteFileFetch.java N:|``n> */ IWYQ67Yj package NetFox; k*_Gg import java.io.*; 'n h^; import java.net.*; `NhG|g tHzgZoBz 0$Tb5+H5 public class SiteFileFetch extends Thread { QP~["%}T bEF2-FO Qw_uw QZ) SiteInfoBean siteInfoBean = null; //文件信息Bean
~;?mD/0k long[] nStartPos; //开始位置 v[|-`e* long[] nEndPos; //结束位置 uWx<J3~q. FileSplitterFetch[] fileSplitterFetch; //子线程对象 YXo?(T.. long nFileLength; //文件长度 +8<$vzB boolean bFirst = true; //是否第一次取文件 #;99vwc boolean bStop = false; //停止标志 2lfEJw($ File tmpFile; //文件下载的临时信息 g]j&F65D DataOutputStream output; //输出到文件的输出流 <e! TF@ KxErWP% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >}wFePl public SiteFileFetch(SiteInfoBean bean) throws IOException 9O &]!ga { p7AsNqEp siteInfoBean = bean; ]ovtH.y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9'(^Coq tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j![1 if(tmpFile.exists ()) ~5Fx[q { %KF I~Qk bFirst = false; 'g<"@SS+ read_nPos(); .hckZx / } n-K/dI else !>'A2V~F { 8nZ_. nStartPos = new long[bean.getNSplitter()]; 3` IR
^ nEndPos = new long[bean.getNSplitter()]; !hJ!ck]M } 6
JI8l`S ;a|%W4 " @D[+@N &@xm< A\S } ?Xpk"N7 i~E0p
, U;kNo3= public void run() DN%JT[7 { aAqM)T83 //获得文件长度 V.8Vy1 $ //分割文件 gs+nJ+b //实例FileSplitterFetch c)Ng9p //启动FileSplitterFetch线程 4-HBXG9#/ //等待子线程返回 j0"4X try{ ){mqo%{SO if(bFirst) >'#vC]@ { P#3J@aRC nFileLength = getFileSize(); kXdXyq if(nFileLength == -1) uo?R;fX26 { KCpq<A% System.err.println("File Length is not known!"); qsEFf(9G } k]AL\)
&W else if(nFileLength == -2) Zk~Pq%u { {oAD;m` System.err.println("File is not access!"); % dtn*NU } 3rMi:*? else 7[ n
|3 { g?iZ RM for(int i=0;i<nStartPos.length;i++) 2f{p$YIt { ]w,|WZm nStartPos = (long)(i*(nFileLength/nStartPos.length)); vH}VieU } 7}NvO"u for(int i=0;i<nEndPos.length-1;i++) S@[NKY { 8B+C[Q:+' nEndPos = nStartPos[i+1]; IR3+BDE)> } N`d%4)|{ nEndPos[nEndPos.length-1] = nFileLength; _s<BXj } 'A3*[e|OS } ]N\D^`iQ K}N~KDW R| d" 0&=/ //启动子线程 D'%M#S0 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -`\n/"#X6i for(int i=0;i<nStartPos.length;i++) Wm}T=L` { s(Wys^[g fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -|u
yJh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), nm_taER nStartPos,nEndPos,i); YHY*dk*|C Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yzl}!& E fileSplitterFetch.start(); )b%zYD9p } QxbG-B^)= // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x8c>2w;6x^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); PYNY1|3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", vo:h"ti nEndPos = " + nFileLength); *6][[)( // fileSplitterFetch[nPos.length-1].start(); <Vt"%C Myn51pczl F(/Ka@
//等待子线程结束 X]2x0 //int count = 0; ,*9gy$ //是否结束while循环 zgGJ<=G. boolean breakWhile = false; YADXXQ" xEq? [M O` !XW8 while(!bStop) ml)\R L { #N|JC d_ write_nPos(); ,y-!h@( Utility.sleep(500); '
Qlj"U breakWhile = true; RH7!3ye zFDtC-GF RZVZ#q(DU for(int i=0;i<nStartPos.length;i++) n'j}u { a*&&6Fo if(!fileSplitterFetch.bDownOver) tCRsaDK> { A"qDc breakWhile = false; Z<=L break; ugj I$u } 2[1t
)EW } ]
X)~D!mA if(breakWhile) u^Ktz
DmL break; WAtv4 3A =\Mb .h/2-pQ> //count++; S !lrnH //if(count>4) 0ap'6 // siteStop(); 1fM`n5?" } M+j*5wNy 8N |K G pO*As_2 System.err.println("文件下载结束!"); FI$
-."F } B\aVE|~PB catch(Exception e){e.printStackTrace ();} P;K3T![ } ={]POL\ A ~e)"!r Y]`o-dV //获得文件长度 q<^MC/] public long getFileSize() 7hLh} { g HxR w int nFileLength = -1; E{^W- try{ a3A3mBw URL url = new URL(siteInfoBean.getSSiteURL()); e7-IqQA{3C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tv~Y5e&8 httpConnection.setRequestProperty("User-Agent","NetFox"); oxUBlye py%~Qz% 'R-g:X\{ int responseCode=httpConnection.getResponseCode(); f`}/^*D if(responseCode>=400) amX1idHo^ { 1D!MXYgm1b processErrorCode(responseCode); WjSu4 return -2; //-2 represent access is error ?'H+u[1. } cf^ i!X0 &v;o }Q}E{ W4P+?c>'2 String sHeader; ^ rUq{ J,=ZUh@M 1U^KN~! for(int i=1;;i++) eJ ^I+?h { Ejf5M\o //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LylCr{s7 //Utility.log(in.readLine()); `|v/qk7
^? sHeader=httpConnection.getHeaderFieldKey(i); z;/8R7L& if(sHeader!=null) D6fd(=t1Z { 'qG-)2
t if(sHeader.equals("Content-Length")) ox\D04:M { R>&8%%# nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); \L}7.fkb8 break; l,3,$ } R[*n3
wB } !g)rp`? else ,)TnIByM break; h qhX } 2 J3/Eu } i]4n YYS catch(IOException e){e.printStackTrace ();} ~J5B?@2hK catch(Exception e){e.printStackTrace ();} C(z'oi:f ?<\2}1 g>gf-2%Uo Utility.log(nFileLength); .wlKl[lE2 f87XE";:A s%>8y\MaK return nFileLength;
{gD`yoPrV } q"S,<I<f lF40n4} 9`"#OQPn1 //保存下载信息(文件指针位置) F~7TE91C private void write_nPos() 5DkEJk7a { AGO"), try{ V,8Z!.MG output = new DataOutputStream(new FileOutputStream(tmpFile)); :>_oOn[ _ output.writeInt(nStartPos.length); *DZ7,$LQ~D for(int i=0;i<nStartPos.length;i++) \}Iq-Je { Y7I\<JG< // output.writeLong(nPos); 0V^I.S/q output.writeLong(fileSplitterFetch.nStartPos); tTubW=H output.writeLong(fileSplitterFetch.nEndPos); CBpwtI>p } iE_[]Vgc output.close(); ma<uXq } Di}M\!-[ catch(IOException e){e.printStackTrace ();} =w"Kkj>%oh catch(Exception e){e.printStackTrace ();} Rh$+9w } 3)2{c wf\7sz p&)d]oV> //读取保存的下载信息(文件指针位置) ;mGPX~38 private void read_nPos() iC>%P&|-)| { 7fS NF7/+ try{ Of$R+n. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); V\]j^$ int nCount = input.readInt(); @t*D<B$ nStartPos = new long[nCount]; ukc
7Z
OQ nEndPos = new long[nCount]; &N+`O)$ for(int i=0;i<nStartPos.length;i++) ~_F;>N~ { T(]*jaB nStartPos = input.readLong(); xdz 6[8d8 nEndPos = input.readLong(); l%?4L/J)# }
ylS6D input.close(); guf*>qNr } Q
8;JvCz catch(IOException e){e.printStackTrace ();} Dfc%
jWbA catch(Exception e){e.printStackTrace ();} 2+C:Em0yI } gX(Xj@=(& 0M&~;`W} '.>y'= private void processErrorCode(int nErrorCode) gN73)uJ0 { D`'Cnt/ System.err.println("Error Code : " + nErrorCode); kUT^o } YU)%-V\ i3d2+N` 0w< ilJ //停止文件下载 sX3qrRY public void siteStop() I3'UrKKO { ZitmvcMk bStop = true; o`7 Z<HF for(int i=0;i<nStartPos.length;i++) ZH>i2|W< fileSplitterFetch.splitterStop(); T\=#y ct
OCj$$u ""|;5kJS4 } njO~^Hl7 } G!G:YVWXP //负责部分文件的抓取 :2/jI:L~ **FileSplitterFetch.java ~Lg ;7i1L
*/ EE`[J0 ( package NetFox; uqa
pj(" BIew\N
YK$[)x\S import java.io.*; iVf7;M8O import java.net.*; t.VVE:A^% ])%UZM6 h| `R[ public class FileSplitterFetch extends Thread { /lPnf7 =PNkzFUo l?V#; String sURL; //File URL #b:YY^{g_ long nStartPos; //File Snippet Start Position gu~R4@3 long nEndPos; //File Snippet End Position u2`j\
Vu int nThreadID; //Thread's ID x*=m'IM[ boolean bDownOver = false; //Downing is over @uN+]e+3 boolean bStop = false; //Stop identical >H5t,FfQL FileAccessI fileAccessI = null; //File Access interface %6Vb1?x kzNRRs\e |!7leL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException sDTw</@ { ) j&khHD this.sURL = sURL; `L[q`r7 this.nStartPos = nStart; v^F00@2I this.nEndPos = nEnd; )R?uzX^qf nThreadID = id; 8O60pB;4 fileAccessI = new FileAccessI(sName,nStartPos);//定位 8bs' Ek{'o } kumo%TXB& *PB /I4>{ BS,EW public void run() -1NR]#P' { @g+v2(f2v while(nStartPos < nEndPos && !bStop) 0=t2|,} { }~ N\A Ea'jAIFPpO i gjn9p&_ try{ 5K682+^5 URL url = new URL(sURL); @]8flb
)T HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :D;pD l httpConnection.setRequestProperty("User-Agent","NetFox"); q
#7Nk)<.
String sProperty = "bytes="+nStartPos+"-"; f\Hw Y)^> httpConnection.setRequestProperty("RANGE",sProperty); /0Qo( Utility.log(sProperty); *O @Zn !b4AeiL>w 8;c\}D InputStream input = httpConnection.getInputStream(); Qp)?wny4 //logResponseHead(httpConnection); |`Yn'Mj8rm !Fxn1Z, PYs0w6o byte[] b = new byte[1024]; ggkz
fg & int nRead; u^c/1H:6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) XeY[;}9 { {D|ST2:E nStartPos += fileAccessI.write(b,0,nRead); X&5N89 //if(nThreadID == 1) Q=vo5)t // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); br
3-.g } ycki0&n3 ,`!lZ|
U P$N5j~* Utility.log("Thread " + nThreadID + " is over!"); @qjN>PH~ bDownOver = true; bi+g=cS //nPos = fileAccessI.write (b,0,nRead); "rEfhzmyF } ;mz#$"( catch(Exception e){e.printStackTrace ();} x?u@
j7[ } -)Vy)hD, } ZqpK}I [cZ/)tm 2J$vX( //打印回应的头信息 \w1',"l` public void logResponseHead(HttpURLConnection con) ?OoI63& { Z)=S>06X Q for(int i=1;;i++) ePI N<F;I { ydY 7 :D String header=con.getHeaderFieldKey(i); $UK m[:7 if(header!=null) ?$tD //responseHeaders.put(header,httpConnection.getHeaderField(header)); tl7:L> Utility.log(header+" : "+con.getHeaderField(header)); 3XQe? 2:< else =ud~ break; %hZX XpuO } UWS 91GN@ } }lhk;#r >=:mtcph M6qNh`+HO public void splitterStop() G,^ ?qbHg { M.Tp)ig\# bStop = true; _5(p=Zc } "$K]+0ryG< Z1+Ewq3m <|X+T, } 5M #',(X w2/3[VZ}l )K$xu (/K /* hu"-dT;4] **FileAccess.java 0`p"7!r *//文件访问(定位,写) ot!m=s package NetFox; G?\eO&QG{" import java.io.*; Ex*{iJ;\ {}iS5[H] AW|SD public class FileAccessI implements Serializable{ "iX\U'` qxHn+O!h //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 m?Cb^WgcF RandomAccessFile oSavedFile; Oj_F1.
r long nPos; DrAIQ7Jd a j
.7t=^ )1@%!fr public FileAccessI() throws IOException O\Z!7UQ$ { L>E{~yh this("",0); eLXL5&}`fh } oTXIs4+G kjdIk9 Y (f_J @n public FileAccessI(String sName,long nPos) throws IOException q *Hg-J} { &?5)Jis: oSavedFile = new RandomAccessFile(sName,"rw"); B~qo^ppVU this.nPos = nPos; c'Ibgfx%m oSavedFile.seek(nPos); H]wP\m) } T3SFG]H yENAc sv T;{:a-8 public synchronized int write(byte[] b,int nStart,int nLen) (.YSs { EL z5P}L6 int n = -1; 7 H:y=?X6 try{ F]>+pU
oSavedFile.write(b,nStart,nLen); v.TgB) n = nLen; -JPkC(V7] } c>3? T^= catch(IOException e) 5T( cy { ycOnPTh e.printStackTrace (); 6biR5&Y5U& } $MNJsc^n I!1+#0SG :5T=y @ return n; cT/mi":8{ } S'ms>ZENC L;{{P7 |#yT]0L%pA } \b!E"I_^ %VR{<{3f (0`w.n /* c9CFGo?)N **SiteInfoBean.java e00}YWf% */ -J#RGB{7 package NetFox; wxPl[)E \*b
.f S&]r6ss public class SiteInfoBean { ,2 W=/,5A &V+KM"Ow N$C+le private String sSiteURL; //Site's URL 3k(tv U+eC private String sFilePath; //Saved File's Path S+wT}_BQ private String sFileName; //Saved File's Name ONy\/lu| private int nSplitter; //Count of Splited Downloading File "_dg$j`Y&& XIZN9/; h7TkMt[l public SiteInfoBean() }YM\IPsPu {//nSplitter的缺省值为5 5VQ-D`kE+ //default value of nSplitter is 5 [UC_ this("","","",5); EEK!'[<,sE } G{>PYLxOb oqhJ2 'r\RN\PT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I^u~r. { [uHC
AP sSiteURL= sURL; 9rT^rTV sFilePath = sPath; -{9mctt/gE sFileName = sName; ;bg]H >$U7 this.nSplitter = nSpiltter; Sf.OBU1rs " Y^9g/ %la1-r~ } ]o0]i<: WvfM.D!
g"kI1^[nj public String getSSiteURL() tu* uQ:Ipk { T{m) = (q return sSiteURL; $0un`&W } S
~fz =2=rPZw9 yZgWFf.X public void setSSiteURL(String value)
EStui>ho { xDH#K0-#L sSiteURL = value; j3N d4# } N|>JLZ> .QZjJ9pvK yE,qLiH public String getSFilePath() 9%NobT { IvY3iRq6 return sFilePath; AJ&j|/ } *V\.6,^v EU|IzUjFj| (S+/e5c) public void setSFilePath(String value) JR15y3F { YwF&-~mp7n sFilePath = value; yZ)9Hd } 3#dz6+ ;fW~Gb?" yTK3eK public String getSFileName() cqJXZ.XC { Aaq%'07ihW return sFileName; I=<Qpd4 } i '*!c [+R_3'aK X;UEq]kcmn public void setSFileName(String value) ){'<67dK { /d:hW4}<}. sFileName = value; dW!El^w} } D|m3.si
zp}pS2DU ]adgOlM public int getNSplitter() ry=8Oq&[~ { L*,h=#x( return nSplitter; H&p: } Qox /abC
h A s}L=2 1;S?9N_B public void setNSplitter(int nCount) 'v
CMf { & /T} nSplitter = nCount; m;>G]Sbe } <Lxp t } w{xa@Q]t- Eri007? D $%"hhju /* N"G\H<n **Utility.java r63l( */ fpC":EX@r package NetFox; k+P3z&e (hZNWQ0 :):vB public class Utility { ,]: <l a:UkVK]MP r4K9W90 public Utility() 4K7ved) { g}R Cjl4 T8|?mVv s #5{xWMp/0 } KU
oAxA >bQOpGy}l //线程睡眠 fjy\Q public static void sleep(int nSecond) ]u$tKC { W'"?5} ( try{ )uo".n|n~B Thread.sleep(nSecond); 3%GsTq2o } $|J+ catch(Exception e) 7 L,`7k| { 7#G!es e.printStackTrace (); Et(H6O8 } j
nSZ@u } H'/V<% /j$pV //日志 @sZ7Ka public static void log(String sMsg) X@tA+ { I(7iD. ^: System.err.println(sMsg); YLA(hg| } wXqwb|2 iV?8'^ LA59O@r public static void log(int sMsg) W5Pur
lu? { HpIi- Es7C System.err.println(sMsg); 9e>2kd } 3gVU#T[[ } +2 oZML cl&?'`
) ~uZ9%UB_m /* G;u~H< **TestMethod.java MmvOyKNZF */ $^^M&[b- package NetFox; ',WJ'g XP}5i!}}7= 2YWO'PL public class TestMethod { qM26:kB{ Pp69|lxV=k .*oL@iX public TestMethod() 1D8S}=5& { ///xx/weblogic60b2_win.exe CPcUB4a%# try{ %@)q=*=y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); iM:-750n/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); G:lhrT{ SiteFileFetch fileFetch = new SiteFileFetch(bean); jCNR63/ fileFetch.start(); Nb_Glf } mrG?5.7W catch(Exception e){e.printStackTrace ();} w ~crj$UM 1pDU}rPJ. W1xPK* } GIpYx`mHi %++:
K hslT49m> public static void main(String[] args) lV4TFt, { 7SYe:^Dx new TestMethod(); d#bg(y\G| } %P<fz1 } (,+#H]L 点击下载更多相关资料
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