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/* Il$Jj-) **SiteFileFetch.java D@yu2}F{IY */ F^X:5g~K
package NetFox; P]`m5 N import java.io.*; -h{| u{t import java.net.*; jU=n\o=? P#qQde/y <xr\1VjA public class SiteFileFetch extends Thread { P30|TU+B O
718s\# =X=m_\=~@ SiteInfoBean siteInfoBean = null; //文件信息Bean tQcn%CK long[] nStartPos; //开始位置 <6!/B[!O= long[] nEndPos; //结束位置
U].3vju`c FileSplitterFetch[] fileSplitterFetch; //子线程对象 "j?\Ze* long nFileLength; //文件长度 JI|MR#_u boolean bFirst = true; //是否第一次取文件 N_f>5uv boolean bStop = false; //停止标志 #>O>=#Q File tmpFile; //文件下载的临时信息 YY
8vhnw DataOutputStream output; //输出到文件的输出流 E>k!d'+tb hbE~.[Y2r //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) nx@h public SiteFileFetch(SiteInfoBean bean) throws IOException aX|LEZ;D> { #iP5@:!Wm~ siteInfoBean = bean; yo_;j@BGR //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); (GbZt{. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); HHg[6aw if(tmpFile.exists ()) &E`=pe/e { z*G(AcS) bFirst = false; KN"<f:u read_nPos(); ,nz3S5~ } MUvgmJsN else d^^EfWU { 's 'H&sa nStartPos = new long[bean.getNSplitter()]; {V5eHn9/Q' nEndPos = new long[bean.getNSplitter()]; )1o<}7 } b0
y*} s!WI:E7 {=<m^
5b9 @&GfCg5Cb } *#Hw6N0# V25u_R`{ l[M?"<Ot; public void run() >^zbDU1wT { CyD)=e{ //获得文件长度 zM!2JC //分割文件 L5A?9zum/! //实例FileSplitterFetch GNab\M. //启动FileSplitterFetch线程 FFpG>+*3 //等待子线程返回 2~RG\JWTA try{ <-F[q'!C1 if(bFirst) EN{o3@ O' { &M*f4PeXb nFileLength = getFileSize(); Or,W2 if(nFileLength == -1) z 3N'Xk { hLF ;MH@ System.err.println("File Length is not known!"); 8N9X1Mb| } POt8G else if(nFileLength == -2) ,8Q&X~$rY { Rxk0^d:sNi System.err.println("File is not access!"); ,@0D_&JAl } !FHm.E_> else "]ZDs^7 { 2tI ,`pSU for(int i=0;i<nStartPos.length;i++) f&NXWo/ { Ji7<UJ30x nStartPos = (long)(i*(nFileLength/nStartPos.length)); MyaJhA6c } *5d6Q for(int i=0;i<nEndPos.length-1;i++) eH^~r{{R { VQl(5\6O nEndPos = nStartPos[i+1]; /[+%<5s } w'7=CzfYn nEndPos[nEndPos.length-1] = nFileLength; f_'8l2jK1i } ?3a:ntX h } <P.'r,"[ (Fs{~4T Usq.'y/o //启动子线程 *=zv:! fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &l?AC%a5 for(int i=0;i<nStartPos.length;i++)
IA680^ { }va>jfy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C@{-$z) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {fa3"k_ke nStartPos,nEndPos,i); AA<QI' 6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e\r%"~v fileSplitterFetch.start();
()e|BFL . } T(
fcE // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), aKz:hG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ZaF9Q% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", <h%I-e6 nEndPos = " + nFileLength); p} {H%L // fileSplitterFetch[nPos.length-1].start(); 9PdD =9HH pT/z`o$#V :*Y2na)qQ //等待子线程结束 sW@_' Lw //int count = 0; ZQ{-6VCjl //是否结束while循环 Z}S7%m boolean breakWhile = false; Vrs?VA`v$ Oi<yT"7 XIn,nCY; while(!bStop) 'OvM { oI-,6G} write_nPos(); 2P ^x'I Utility.sleep(500); -\n%K breakWhile = true; us+z8Mz Z@}qL1 ?AK`M #M for(int i=0;i<nStartPos.length;i++) HI7w@V8Ed { VS >xvF if(!fileSplitterFetch.bDownOver) */2nh%>$ { bEln.) breakWhile = false; 54=*vokX_ break; inh
J|pe" } me@)kQ8M } qA"BoSw 4 if(breakWhile) DLuaM?7 break; 5Dzf[V^]` :$0yp`k hZlHY9[t? //count++; 5?Pf#kq //if(count>4) v3]5`&3~ // siteStop(); .f"1(J8 } RLZfXXMn -K3d u&j GUZ.Pw System.err.println("文件下载结束!"); 6%}`!_N<Mc } ) J.xQ}g catch(Exception e){e.printStackTrace ();} 2vh }:A_ } (cyvE}g Q-rG~O9- zw+RDo //获得文件长度 at4JLbk public long getFileSize() {2YqEX-I* { 7F2 RH 8 ) int nFileLength = -1; `S0`3q}L3% try{ O-[ URL url = new URL(siteInfoBean.getSSiteURL()); ?|98Y"w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y0`;
br\X httpConnection.setRequestProperty("User-Agent","NetFox"); ?dbSm3 6<T:B[a- `+rwx int responseCode=httpConnection.getResponseCode(); '%wSs,HD if(responseCode>=400) ]A5Y/dd { Q4_r) &np processErrorCode(responseCode); Ar[|M2| return -2; //-2 represent access is error ^lt2,x } 9!(%Vf> ~\<$H' }Nd1'BVf String sHeader; 8lzoiA_9 2]Il:>n, Z|Oq7wzEH for(int i=1;;i++) 8["%e#%`$ { Jx~H4y=z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r5N TTc
//Utility.log(in.readLine()); 0FtwDM)) sHeader=httpConnection.getHeaderFieldKey(i); C#nT@;VO5 if(sHeader!=null) )v_v 7 ~H& { Jw8?o/1D@ if(sHeader.equals("Content-Length")) !u@P\8M} { ;cvMNU$fN nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); NLY=o@< break; (_"Zbw%cJy } ;b*qunJ3L } Bh'fkW3 else Q5T3 break; a`n)aXU l } 'mbLK#q } T>'O[=UWh catch(IOException e){e.printStackTrace ();} &`@YdZtd" catch(Exception e){e.printStackTrace ();} D$K'Qk c>K]$;} 9Z!n!o7D Utility.log(nFileLength); 05R"/r* U,#x\[3!Jt A~PR return nFileLength; +4_, , I } /]3[| i,r:R
g~ 'Og@<~/Xy //保存下载信息(文件指针位置) :vb5J33U private void write_nPos() 88v8lt;R { p"p~Bx try{ kEnGr6e output = new DataOutputStream(new FileOutputStream(tmpFile)); ?-<lIFFh output.writeInt(nStartPos.length); UgGa]b[9A for(int i=0;i<nStartPos.length;i++) ]|tg`*l!> { }x`Cnn // output.writeLong(nPos); &]o-ZZX output.writeLong(fileSplitterFetch.nStartPos); NUYKMo1ze output.writeLong(fileSplitterFetch.nEndPos); c%/b*nQ(= } |T""v_q output.close(); ~^' ,4<K-} } %US&`BT! catch(IOException e){e.printStackTrace ();} =0d|F
8 catch(Exception e){e.printStackTrace ();} -i:WA^yKgw } z qq y<Q"]H.CkQ \t7yH]:>@ //读取保存的下载信息(文件指针位置) xKSQz private void read_nPos() _M`ZF*o=c { =4eJ@EVM try{ >n09K8
A DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); T06(Q[) int nCount = input.readInt(); Dm)B? H" nStartPos = new long[nCount]; _eiqs nEndPos = new long[nCount]; gQ{ #C' for(int i=0;i<nStartPos.length;i++) :>fT=$i@ { WT ;2aS: nStartPos = input.readLong(); m>vwpRBOA nEndPos = input.readLong(); !#)t<9]fv } >4X2uNbZS input.close(); K|Sq_/#+U } cuQ!"iH catch(IOException e){e.printStackTrace ();} +-<G(^ catch(Exception e){e.printStackTrace ();} e3;& } L?[m$l!T} {Ge{@1 *lSu=dk+ private void processErrorCode(int nErrorCode) [;z\bV<S { Qfm$q~`D^W System.err.println("Error Code : " + nErrorCode); f#!+l1GV } !{jw!bB ez'NHodwk2 &THtQ1D //停止文件下载 `MI;.t public void siteStop() B"&-) ( { 2o?j{K bStop = true; a* cWj}u for(int i=0;i<nStartPos.length;i++) Km(i}:6" fileSplitterFetch.splitterStop(); ;W?#l$R 7\
_MA!:< d~u=,@FK } uBRlvNJ } =1Sny7G //负责部分文件的抓取 :01d9|# **FileSplitterFetch.java MI`qzC*% */ GI]\ package NetFox; 12Oa_6<\0; ?sk>Mzr dkw.o.e import java.io.*; ^N/d`IAjv import java.net.*; sjyr9AF `7=$I~` w#b@6d public class FileSplitterFetch extends Thread { KmNnW1T v?VDASR2` V5K/)\# String sURL; //File URL ?/o 8f7Z long nStartPos; //File Snippet Start Position -hXKCb4YU long nEndPos; //File Snippet End Position #sw4)*v int nThreadID; //Thread's ID o.ZR5 `. boolean bDownOver = false; //Downing is over LaQ7A,] boolean bStop = false; //Stop identical P2'N4?2 FileAccessI fileAccessI = null; //File Access interface R/oi6EKv Y%?S:&GH p*b_"aF 1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException lI?P_2AaS { g!XC5*} this.sURL = sURL; )$!b`u this.nStartPos = nStart; O >h` this.nEndPos = nEnd; Y1h)aQ5{ nThreadID = id; 8s)b[Z5 fileAccessI = new FileAccessI(sName,nStartPos);//定位 uHKEt[PS$ } OyO]; Yk >:-e uN)c!='I public void run() !5 }}mf { +cH>'OXoB while(nStartPos < nEndPos && !bStop) tKV, { N6._Jb EnWv9I<
(I$%6JO: try{ x@OBGKV URL url = new URL(sURL); osXEzr( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |`o|;A] httpConnection.setRequestProperty("User-Agent","NetFox"); Eiu/p&ct String sProperty = "bytes="+nStartPos+"-"; >=0]7k; httpConnection.setRequestProperty("RANGE",sProperty); ,'0#q Utility.log(sProperty); V[(fE=cIN~ u
]"fwkL h^ Cm\V InputStream input = httpConnection.getInputStream(); \ivxi<SR //logResponseHead(httpConnection); ID_4M_G +;~N; BT 8NfXYR# byte[] b = new byte[1024]; .Exvuo`F int nRead; Z{B
e while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v":q_w<k { uA#K59E+ nStartPos += fileAccessI.write(b,0,nRead); 8_}t,BC //if(nThreadID == 1) tY;<S}[@7w // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Pdf-2
Tx } MSmr7%g3D f0H.$UAL Po)U!5Tm Utility.log("Thread " + nThreadID + " is over!"); :xr^E] bDownOver = true; :Dty([ //nPos = fileAccessI.write (b,0,nRead); 84WDR? } )9nW`d+ catch(Exception e){e.printStackTrace ();}
'6M6e( } yn\c;Z } n}UJ-\$ lMFo)4&P L?/AKg //打印回应的头信息 HF*0 public void logResponseHead(HttpURLConnection con) }*(_JR4G { 3JGrJ!x for(int i=1;;i++) *>a=ku:? { $l*?Ce: String header=con.getHeaderFieldKey(i); 08xo_Oysq if(header!=null) ]owgsR //responseHeaders.put(header,httpConnection.getHeaderField(header)); JH\:9B+:L Utility.log(header+" : "+con.getHeaderField(header)); IVPN=jg? else +%XByY5 break; #ELeW3
S} } L(yUS)O } D
\i]gfu8W v's1&%sM trDw|WA public void splitterStop() [
iTP:8 { l+6c|([ bStop = true; )>1}I_1j) } ]B )nN': >>T7;[h 5@5*}[M } y!1X3X,V T{
@@V / ]8e[t>!f /* 3g4=as4w **FileAccess.java )'m;a_r` *//文件访问(定位,写) ~qqxHymc package NetFox; XnP?hw% import java.io.*; ;J|t-$Z !M8_PC*a DyqqY$ vH( public class FileAccessI implements Serializable{ fof}I:vO fYPu%MN7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [RKk-8I RandomAccessFile oSavedFile; :lXY% [!6P long nPos; AM=,:k$ 4}DFCF%B QD0x^v8 public FileAccessI() throws IOException JE}VRMNr { 9@CRL= this("",0); J\@g3oGw }
ZY8.p C:No ^nH> Tl yyJ{~ public FileAccessI(String sName,long nPos) throws IOException |?J57( { Lx>[`QT oSavedFile = new RandomAccessFile(sName,"rw"); YT?Lt!cl= this.nPos = nPos; m4~
|z oSavedFile.seek(nPos); -6J <{1V } ?ja%*0
R 4*Hzys[{ j~Pwt9G public synchronized int write(byte[] b,int nStart,int nLen) MH)V=xU|) { Ba?1q%eG int n = -1; m19\H try{ \%r0'1f oSavedFile.write(b,nStart,nLen); tXA?[ S n = nLen; (b~l.@xh } A-L1vu; catch(IOException e) ~x(|'` { o5J6Xi0+ e.printStackTrace (); muXP5MO } @_"cMU! i/*)1;xsk pf'DbY! return n; L/Kb\\f } a$?d_BX PeIi@0vA p4IyKry, } !pU^?Hy= >Z*b0j h0m5oV /* (M|DNDM'd **SiteInfoBean.java &8f/ 6dq */ u9Adu` package NetFox; h-Y>>l>PW0 {hN\=_6*EW &Y@),S9 public class SiteInfoBean { e;~(7/1 Y(`Bc8h ms Cz\8Xd private String sSiteURL; //Site's URL x1`w{5;C 2 private String sFilePath; //Saved File's Path du}HTrsC private String sFileName; //Saved File's Name %pWJ2J@ private int nSplitter; //Count of Splited Downloading File >0:3CpO* 6 Q7MAP M tk-)N+M. public SiteInfoBean() J
V}7c$_ {//nSplitter的缺省值为5 d~_5Jx //default value of nSplitter is 5 i@6g9\x+
this("","","",5); F$4=7Njv } <,p$eQ)T% x])j]k ([a;id public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) q("l?' { + AjV0 #n sSiteURL= sURL; A #SO}c sFilePath = sPath; 4MDVR/Z7 sFileName = sName; 3ONW u this.nSplitter = nSpiltter; 7}\AhQ, S fh_:ung _"D J|j } 1Zk1!> ? 1$# r)S[* <oP`\m public String getSSiteURL() PDc4ok`) { $=>:pQbBVX return sSiteURL; B^/Cx } 0Z((cI\J :T6zT3(")D G M;uwL# public void setSSiteURL(String value) d72( g$F { R.*
k7-(; sSiteURL = value; ~ cu+QR) } c uAp,! K4Nz I9@ J+0
?e9 public String getSFilePath() ^cW{%R>XY { =$~x] return sFilePath; xzMpT ZQ } 2.j0pg . c\P}ZQ *2pE39 public void setSFilePath(String value) 4;Hm%20g { h\)ual_r[j sFilePath = value; @:'E9J06 } 26_PFHQu4 ;$!0pxL)s MD1d public String getSFileName() <;+QK=f { zYPvpZV/ return sFileName; }
-hH2 } WV|9d}5 YE"MtL { c7?|Tipc public void setSFileName(String value) 3PzF^ 8KJ { )086u8w )y sFileName = value; bX`]<$dr3 } xU.Ymq& 5 *0a7H$iQ(] S +73 /Vs public int getNSplitter() bw#\"uJ { s5d[sx return nSplitter; 9%P$e=Ui# } '+^XL6$L 8fWnKWbbjw blbzh';0} public void setNSplitter(int nCount) 'i/"D8 { kc2E4i nSplitter = nCount; {;UBW7{ } OH+2)X } z"sv,W 3@;24X aI\>=*HF /* ok&v+A **Utility.java .$x822
*/ <&M5#:u package NetFox; [z}$G:s 99q$>nx,w ,n5 [Y) public class Utility { Zr\G=0` 1-4*YrA ]=0D~3o3 public Utility() +w3k_^X9c { x4_FG{AIu 7 Uu 9JC8OSjJ } !.{{QwZ i6h0_q8
> //线程睡眠 6ozBU^n public static void sleep(int nSecond)
w$I$xup { ~Oj-W6-+&, try{ +qF,XJ2 Thread.sleep(nSecond); 9VTE?, } O
>&,h^ catch(Exception e) WgV[,( { +7)/SQM5 e.printStackTrace (); ^yF2xJ)9- } <J1$s_^` } !3at(+4 Lr(wS { //日志 b(g?X
(& public static void log(String sMsg) }xzbg { $0E_4#kwB System.err.println(sMsg); 1T7;=<g` } A832z` pK2n'4
C _UeIzdV9 public static void log(int sMsg) 0l %|2}a { ] yXrD`J! System.err.println(sMsg); J
9k~cz } ! XNTk]! } 9o5_QnGE y {1p# nxYp9,c" /*
1(U\vMb **TestMethod.java <wt9K2, */ .hXdXY package NetFox; d5B96;3 _9zydtw u%Yr&u public class TestMethod { ]O;Rzq{D( )%5T*}j s*pgR=dZZ public TestMethod() "Q@ZS2;A { ///xx/weblogic60b2_win.exe !tD,phca~ try{ {YgB?kt5 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); }h)[>I( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); bQM_rqjJGw SiteFileFetch fileFetch = new SiteFileFetch(bean); |[lM2 fileFetch.start(); ddD $ 4+ } Z)zmT%t catch(Exception e){e.printStackTrace ();} [HhdeLOX U~8 oE_+ Z66@@?` } S}*%l)vfR @=[SsS )TcW.d6 public static void main(String[] args) $r=Ud > { `5Qo*qx new TestMethod(); 4 p(KdYc
} OW<5,h } d<v>C-nk% 点击下载更多相关资料
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