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/* c
@R6p+ **SiteFileFetch.java |&vuK9q */ fO nvC* package NetFox; U)8]pUI+/P import java.io.*; O1,[7F.4g import java.net.*; 37Y]sJrs$ _#B/#^a eH{ 9w8~ public class SiteFileFetch extends Thread { 6Tnzg`0I 9v0|lS!- Nig-D>OS SiteInfoBean siteInfoBean = null; //文件信息Bean FeLP!oS> long[] nStartPos; //开始位置
V;jz0B long[] nEndPos; //结束位置 /G ;yxdb FileSplitterFetch[] fileSplitterFetch; //子线程对象 Y2EN!{YU long nFileLength; //文件长度 !)34tu2 boolean bFirst = true; //是否第一次取文件 ZbUf|#GTB boolean bStop = false; //停止标志 H;1}Nvvd File tmpFile; //文件下载的临时信息 HxaUVg0 DataOutputStream output; //输出到文件的输出流 g=Di2j{A -f=hL7NW //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Km7 public SiteFileFetch(SiteInfoBean bean) throws IOException $(U|JR@ { wn&2-m*a siteInfoBean = bean; mZyTo/\0 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }__+[- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 9K!='u` if(tmpFile.exists ()) .2xkf@OP {
2X_ef bFirst = false; ZI7<E read_nPos(); )RFeF!(" } Sqs`E[G* else _rd{cvdR { -}@9lhS, nStartPos = new long[bean.getNSplitter()]; {W]jVh p nEndPos = new long[bean.getNSplitter()]; xFZq6si? } s? Kn,6Y }T,uw8?f! >YLm]7v} v&n&i? } g%trGW3{- @#apOoVW> Sls>
OIc public void run() VzesqVx { 5oS\uX| //获得文件长度 ?}[keSEh> //分割文件 VM[8w` //实例FileSplitterFetch @d\F; o< //启动FileSplitterFetch线程 il~,y8WTU{ //等待子线程返回 jPfoI- try{ /7^~* if(bFirst) H;2pk { (&(f`c@I nFileLength = getFileSize(); PW}.` if(nFileLength == -1) Cp%|Q.? { PBmt.yF System.err.println("File Length is not known!"); 0*)79Sz }
U{EW +> else if(nFileLength == -2) q<VhP2R { (P ?9Jct System.err.println("File is not access!"); T (qu~} } -g0>>{M' else i(WWF#N5 { #=rR[:M for(int i=0;i<nStartPos.length;i++) 7F.,Xvw&@ { art{PV4- nStartPos = (long)(i*(nFileLength/nStartPos.length)); ]G:xT v8 } m|
Z)h{& for(int i=0;i<nEndPos.length-1;i++) [C$ 0HW { #_d%hr~d nEndPos = nStartPos[i+1]; @lwqkJ } a|.u; nEndPos[nEndPos.length-1] = nFileLength; 'g#GUSXfj } {%
P;O ?
} YdFC YSiS l_:%?4MA )7^jq| //启动子线程 &kG<LGXP# fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; c\Dv3bF for(int i=0;i<nStartPos.length;i++) utr_fFu { om1 /9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XL:7$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *XJSa nStartPos,nEndPos,i); rhrlEf@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]Uu/1TTf fileSplitterFetch.start(); |fUSq1// } DcOLK\ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hXCDlCO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); D)Zv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", DCj!m<Y& nEndPos = " + nFileLength); b|N EU-oy // fileSplitterFetch[nPos.length-1].start(); Y3[@( + '`RJ,K+[ CVm*Q[5s" //等待子线程结束 R:Lu)d>= //int count = 0; 4T:ZEvdzf //是否结束while循环 4Xz|HU? boolean breakWhile = false; _#+i;$cO-X %X3T<3< D<MtLwH while(!bStop) &b_duWs { "k.<" pf write_nPos(); f c91D]c Utility.sleep(500); 6vDgMfw breakWhile = true; .MKxHM7 Fq8Z:;C8 [(C lvGx for(int i=0;i<nStartPos.length;i++) y3x_B@}BY { M<SZ7^9< if(!fileSplitterFetch.bDownOver) e*tOXXY1 { r<U }lK breakWhile = false; MStaP;| break; hYLu } ]?^mb n } ,q4 Y
N-3 if(breakWhile) BEw(SQH break; ?IK[]=! aa|xZ C-8@elZ1 //count++; YJ6Xq||_ //if(count>4) <*L8kNykK // siteStop(); E:2Or~ } NunT1ved [Mx+t3M p|zW2L System.err.println("文件下载结束!"); x`4">:IA } [8ih-k catch(Exception e){e.printStackTrace ();} o.,hCg)X } 8O]$)E ?n}L+| c5JxKU_ //获得文件长度 BwR)--75 public long getFileSize() IMj{n.y4 { NOvN8.K% int nFileLength = -1; .A E(D7d6 try{ Yv>% 5` URL url = new URL(siteInfoBean.getSSiteURL()); [,VD^\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |g~.]2az httpConnection.setRequestProperty("User-Agent","NetFox"); nk[ixVc Ra/S46$ Ta_#Rg*! int responseCode=httpConnection.getResponseCode(); T!8,R{V]4 if(responseCode>=400) sPut@4[S { z;T?2~g! processErrorCode(responseCode); Gd!y,n&s return -2; //-2 represent access is error 9BP-Iet } -{HA+ YL H [l0>pHl@ OmsNo0OA String sHeader; FbF P (f7R~le qTG/7tn
" for(int i=1;;i++) \j4TDCs_[ { sq_
f[! //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); OF}vY0oiw? //Utility.log(in.readLine()); z&w@67
>j sHeader=httpConnection.getHeaderFieldKey(i); LKhUqW if(sHeader!=null) y:m Xv<g { V
V<Zl if(sHeader.equals("Content-Length")) flRok?iF { Gx!Y
4Q}- nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o<Q~pd#Ip, break; >mz<=n
} HZ/e^"cpM }
KrB"2e+J else Bx)4BPaN break; opd^|xx0 } ~OXPn9qPp } "~XAD(T6 catch(IOException e){e.printStackTrace ();} }}<^fM catch(Exception e){e.printStackTrace ();} s$A|>TOY +ps(9O/B> J%{>I Utility.log(nFileLength); /@:I\&{f'9 (m13
ong `j9 ;9^ return nFileLength; DKR2b`J } Yf1?3(0O nPE{Gp) } T< D&%) //保存下载信息(文件指针位置) ta%yQd7 private void write_nPos() G@s
rQum( { `#R[x7bA1 try{ 09/Mg output = new DataOutputStream(new FileOutputStream(tmpFile)); `KB; 3L output.writeInt(nStartPos.length); 6YNd;,it>p for(int i=0;i<nStartPos.length;i++) L\aG.\ { voiWf?X // output.writeLong(nPos); 5y0N }} output.writeLong(fileSplitterFetch.nStartPos); wZ0RI{)s' output.writeLong(fileSplitterFetch.nEndPos); X3@Uih}| } `fS$@{YI_ output.close(); ]@0C1r } Kqm2TMO]>V catch(IOException e){e.printStackTrace ();} y2KR^/LN|Y catch(Exception e){e.printStackTrace ();} @kd`9Yw } :>f}rq /@ m]@ A{MMY{K3 //读取保存的下载信息(文件指针位置) z#m ~} private void read_nPos() \(C6|-:GY { Qu|H_<8g try{ K|]/BjB/ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); s+DOr$\ int nCount = input.readInt(); 508v:?^' nStartPos = new long[nCount]; <- L}N ' nEndPos = new long[nCount]; g=n{G@ *N for(int i=0;i<nStartPos.length;i++) ^M0 { ]jjHIFX nStartPos = input.readLong(); f3^Anaa]l nEndPos = input.readLong(); *PM#ngLX}r } }]<0!q &xB input.close(); 4
Fl>XM } ]Q$S ei5 catch(IOException e){e.printStackTrace ();} }p5_JXBV catch(Exception e){e.printStackTrace ();} Kl_(4kQE_ } )V d^#p $t0o*i{ f\xmv|8 private void processErrorCode(int nErrorCode) iSbPOC7 { ||D PIn] System.err.println("Error Code : " + nErrorCode); !y+uQ_IS@ } x n?$@ 4(
$p8J *+(rQ";x //停止文件下载 %tB7 &%ut public void siteStop() R#HVrzOO|T { ^p)#;$6b bStop = true; OYSq)!: for(int i=0;i<nStartPos.length;i++) 'hR0JXy fileSplitterFetch.splitterStop(); 5\V""fH KT[ZOtu agt/;>q\~ } Hsn'" } z^vfha //负责部分文件的抓取 qA0PGo **FileSplitterFetch.java # ~Doz7~ */ sKCYGt$ package NetFox; hi`[ DG?g~{Y~b t'1g+g import java.io.*;
pu~b\&^G import java.net.*; ,oykOda:| X!_&%^L' e>6|# d public class FileSplitterFetch extends Thread { DL`8qJ'mJs {7jl) x3l X$e*s\4 String sURL; //File URL By waD? long nStartPos; //File Snippet Start Position {xx}xib3 long nEndPos; //File Snippet End Position )xq=V int nThreadID; //Thread's ID v*[UG^+) boolean bDownOver = false; //Downing is over .' }jd# boolean bStop = false; //Stop identical O uNPD q% FileAccessI fileAccessI = null; //File Access interface Z_[ P7P 9U8x&Z]P ,Qx]_gZ` public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `Fie'[F5,) { zOd*> this.sURL = sURL; w"5Eyz-eO this.nStartPos = nStart; vJxEF&X this.nEndPos = nEnd; UB/"&I uo nThreadID = id; h4jo<yp\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 .fbY2b([ } :s6aFiz A
0v=7
] ;plBo%EBV public void run() To}eJ$8*5 { Q 9fK)j1$ while(nStartPos < nEndPos && !bStop) EB|
iW2' { ((C|&$@M /{f"0]-RA Qo)Da}uo20 try{ 9dq"x[ URL url = new URL(sURL); 6@TU9AZS` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A|GtF3:G httpConnection.setRequestProperty("User-Agent","NetFox"); 8tQ;N' String sProperty = "bytes="+nStartPos+"-"; TG[u3Y4 httpConnection.setRequestProperty("RANGE",sProperty); -'Ay(h Utility.log(sProperty); qCg<g 2TUV9Z (>vyWd] InputStream input = httpConnection.getInputStream(); O 2-n- //logResponseHead(httpConnection); fGb}V'x}r udu<Nis4 {.542}A byte[] b = new byte[1024]; m^!:n$ int nRead; 4j~q,#$LW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =WjHf8v; { :`e#I/, nStartPos += fileAccessI.write(b,0,nRead);
V1B!5N< //if(nThreadID == 1) 0KnL{Cj // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ("\{=XAQ } 5CZyA`3V^5 vP x/&x L/Q[N^ (^ Utility.log("Thread " + nThreadID + " is over!"); o!:Z?.! bDownOver = true; `Jk0jj6Z //nPos = fileAccessI.write (b,0,nRead); VxBBZsZO~ } ;+<IWDo catch(Exception e){e.printStackTrace ();} jB(+9?;1${ } A+="0{P } ''YqxJ fb g]lEG>y1R p;>A:i //打印回应的头信息 YZ5,K6u public void logResponseHead(HttpURLConnection con) `mzlOB { W?5') for(int i=1;;i++) Ux7LN@4og { R|n String header=con.getHeaderFieldKey(i); gYhY1Mym if(header!=null) 9T;4aP>6j# //responseHeaders.put(header,httpConnection.getHeaderField(header)); <mQXS87 Utility.log(header+" : "+con.getHeaderField(header)); LP6p else l3sF/zkH break; SK
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} wkM1tKhy/ } /QY F|%7! iqvLu{ q0NFz mG public void splitterStop() W}f)VC;D { }:m/@LKB bStop = true; ux<|8S } o5bp~.m<
8
MQq3 )GkJ%o#H2 } T9
/;$6s* f^FFn32u 7pm'b,J< /* m,lZy#02s3 **FileAccess.java &]DB-t#\ *//文件访问(定位,写) ?qNU*d package NetFox; -N8rs[c import java.io.*; x="Wqcnj{ `G qe]ZE#" pcy;]U? public class FileAccessI implements Serializable{ <{isWEW9]3 jc&k-d>=G //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !&{rnK RandomAccessFile oSavedFile; au{)5W4~ long nPos; 5dm ~yQN/ SXk.7bMV6 o]4]fLQ public FileAccessI() throws IOException itg_+%^R { j(=w4Sd_W this("",0); 5tYo! f } (-gomn _#u\ar) f' ?/P~[ public FileAccessI(String sName,long nPos) throws IOException A`n>9|R { n9'3~qVZ oSavedFile = new RandomAccessFile(sName,"rw"); a_RY Yj this.nPos = nPos; riDb!oC oSavedFile.seek(nPos); 17 Ugz? } wXKtQ#o} hq
3n&/ =]%JTGdp( public synchronized int write(byte[] b,int nStart,int nLen) vN Bg&m { 0~bUW V int n = -1; Wef%f]u try{ pR61bl) oSavedFile.write(b,nStart,nLen); wtw=RA n = nLen; <E2 IU~e } e$Ksn_wEq catch(IOException e) BS9VwG<Z { w\)K0RN e.printStackTrace (); 3YHEH\60^ } h3o'T=`Sm suY47DCX) 1,-C*T}nR return n; ye(b 7CX } l~i? &DLWlMGq dH y9
wU } wXIRn?z B*Tn@t W jH<
#)R /* 1&|]8=pG7 **SiteInfoBean.java 2 ? qC8eC */ z`wIb package NetFox; l7|z]v- fz(YP=@ZnP #EH=tJgO|J public class SiteInfoBean { ;|q<t C?\(?%B \O5L#dc# private String sSiteURL; //Site's URL 9{u= private String sFilePath; //Saved File's Path F7DA~G! private String sFileName; //Saved File's Name =I# pXL private int nSplitter; //Count of Splited Downloading File YnEyL2SuU 'H530Y\ I0m7;M7 P public SiteInfoBean() Gyq 6? {//nSplitter的缺省值为5 ?()*"+N(ck //default value of nSplitter is 5 hY`<J]-'` this("","","",5); ]3LLlXtK[ } 5T x4u%g q`9.@u@ a ^&qK\m_A public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ,b*?7R { CD&a_-'z$K sSiteURL= sURL; |p:4s"NT sFilePath = sPath; bf_
>?F^ sFileName = sName; $e\s8$EO this.nSplitter = nSpiltter; bo\ bs1 Uu_qy(4 vNSUrf,r } \D@j`o Z[#8F&QV!m 2R\K!e public String getSSiteURL() 5i[O\@]5 { /HdXJL9B return sSiteURL; 1dN/H)] } V'kBF2} @Tu`0=8 T8S&9BM7 public void setSSiteURL(String value) L1SX2F8 { ~O}r<PQ sSiteURL = value; D_l$"35? } 2j-l<!s A%^?z. ctP+ECH public String getSFilePath() vFUp$[ { k-~}KlP return sFilePath; {8m&Z36E } Qw0k-t0=4 Cff6EE *y4DK6OFe public void setSFilePath(String value) xm{?h,U, { P.Ntjz/B sFilePath = value; 5gf
~/Zr } sl$6Zv-l%0 ^(q .f=I!a QD-\'Bp/X public String getSFileName() mnA_$W3~I { S)EF&S(TC return sFileName; <V^o.4mOg> } sVh)Ofn I#OZ:g^ %Xc,l Y1? public void setSFileName(String value) 2hHRitt36 {
I bD
u+~) sFileName = value; L(3&,!@ } "]eB2k_> T6/P54S q]4h#?.-1v public int getNSplitter() XJo.^<m { KpGx<+0p return nSplitter; ;-3&yQ7N) } o33t~@ RX w[GEm,ZC CbZ;gjgY* public void setNSplitter(int nCount) vAM1|,U { lf-.c$.> nSplitter = nCount; kwp%5C-S } 'd
N1~Pa } ozY$}|sjDT H^'%$F?Ss G&h@ /* F:jNv3W1 **Utility.java _n:RA)4* */ >a975R*g package NetFox; 2D:/.9= 8v _OGv2r 3FvVM0l" public class Utility { Fx!D:.)/G ^x0N]/ 6|=]i-8 public Utility() Tv#d>ZSD { l$5nv5r ]EK(k7nH
,hf W2} } ViW2q"4= ]U#of O //线程睡眠 )"?'~ 5A public static void sleep(int nSecond) @KM?agtlbl { f
I%8@ : try{ B*:I-5 Thread.sleep(nSecond); Z,p@toj' } d%I7OBBx@ catch(Exception e) o~'p&f { ^Zvb3RJ g e.printStackTrace (); a =W%x{ } '`;=d<' } Z'A 3\f qMEd
R;o //日志 dA~_[x:Z public static void log(String sMsg) u"zR_CzYc { %KVmpWku System.err.println(sMsg); ]-t>F } b~UWFX#U sPc}hG+N vw>(JCR public static void log(int sMsg) ktPM66`b { z4
=OR@ h System.err.println(sMsg); } J?,?>Z } >-V632(/{o } z
8M\(< E-^(VZ_Xj 9Tr ceL; /* Ytc[ kp **TestMethod.java 48z%dBmTT* */ o6^ETQ package NetFox; TfJ*G6\7e# 3XB`|\: t;Z9p7rk public class TestMethod { +wz1kPRs 7:g_:}m 4Y'Ne2M{ public TestMethod() #8L:.,AYE { ///xx/weblogic60b2_win.exe khjdTq\\ try{ ]i075bO/ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &KBDrJEX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5mV!mn:H: SiteFileFetch fileFetch = new SiteFileFetch(bean); 8a)4>B fileFetch.start(); 9_==C"F } 1?w=v|b:P) catch(Exception e){e.printStackTrace ();} !4<D^eh ^O<v'\!z- `oe=K{aX } dLGHbeZ[( 'DXT7|Df h<M1q1) public static void main(String[] args) t]Ln(r { 1.u^shc&| new TestMethod(); UUDbOxD^w } #qk=R7"Q } /":/DwI' 点击下载更多相关资料
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