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/* !Qjpj KRy **SiteFileFetch.java e'(n ^_$nl */ f[.RAHjk package NetFox; pZ+zm6\$ import java.io.*; %>Z=#1h/a import java.net.*; NS-u,5Jt Ud^+a H {z|0Y&>[= public class SiteFileFetch extends Thread { 2W|4 }fZT$'*; $@Zb]gavt? SiteInfoBean siteInfoBean = null; //文件信息Bean s2_j@k?% long[] nStartPos; //开始位置 /#20`;~F) long[] nEndPos; //结束位置 5|NM]8^^0[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 l Vo](#W long nFileLength; //文件长度 ]o$Kh$~5 boolean bFirst = true; //是否第一次取文件 5dT-{c%w4 boolean bStop = false; //停止标志 LTS3[=AB File tmpFile; //文件下载的临时信息 ] $$ciFM DataOutputStream output; //输出到文件的输出流 -WE pBt7* m@.4Wrv //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #l2wF>0 public SiteFileFetch(SiteInfoBean bean) throws IOException x`{ni6} { [ hm/B`t*e siteInfoBean = bean; `(H]aTLt , //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); VaJX,Q tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); s) u{A if(tmpFile.exists ()) k<ku5U1| { s!nFc{ bFirst = false; /$\yAOA'y read_nPos(); I|m fr{ } %<O'\&!, else 7.CzS { {3yzC nStartPos = new long[bean.getNSplitter()]; pwT|T;j* nEndPos = new long[bean.getNSplitter()]; >wej1#\3 } k`Ab*M$@Xs SEr\ u# 2U2=ja9:Y '|':W6m, } YTL [z:k} D@^ r
7n,nODbJ public void run() {G&K_~Vj { Tcz67&c |W //获得文件长度 uZz^>*b //分割文件 Z$X2*k6PK //实例FileSplitterFetch 37?%xQ! //启动FileSplitterFetch线程 ?T7`E q //等待子线程返回 Lx8^V7X try{ L:%ek3SOz if(bFirst) PQWo<Uet { u Y V= nFileLength = getFileSize(); &sR{3pC} if(nFileLength == -1) 7`6n]4e { J^hj
R%H System.err.println("File Length is not known!"); S-gL]r3G8 } ?#ndMv!$ else if(nFileLength == -2) ZL #4X*zT { \ s`'3y System.err.println("File is not access!"); G2ZF`WQ } %N|7<n<S else }%| (G[ { yb*SD! for(int i=0;i<nStartPos.length;i++) 7 '2E-#^ { 0h^upB#p nStartPos = (long)(i*(nFileLength/nStartPos.length)); w?Nvm?_] } W>wIcUP<< for(int i=0;i<nEndPos.length-1;i++) cm%QV? { t&mw@bj nEndPos = nStartPos[i+1]; Z7JI4" } +NxEx/{ nEndPos[nEndPos.length-1] = nFileLength; ?%{bMqYJD{ } igOjlg_Q } L=Dd` 5Jp@n . 28d: //启动子线程 .oO_x> fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =9i:R!,W for(int i=0;i<nStartPos.length;i++) x/~V
ZO { 1oFU4+{ 4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B*zb0hdo: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), IJD'0/R'c nStartPos,nEndPos,i); Axk
p Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nrUrMnlg fileSplitterFetch.start(); 9^4^EY# } 58mzh82+ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KG'4;Z5J siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .Ig`v // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", zY(w`Hm2 nEndPos = " + nFileLength); t.j q]L // fileSplitterFetch[nPos.length-1].start(); ) Y\} ,O Iu2RK J}i$ny_3OB //等待子线程结束 rxI?|}4 //int count = 0; ;pU9ov4) //是否结束while循环 x(hUQu 6 boolean breakWhile = false; Wgq*| teW "}\z7^.W> -[~{c]/ c while(!bStop) pA!+;Y!ZB< { |5F]y"Nb write_nPos(); []1VD# Utility.sleep(500); rD%(*|Y"c breakWhile = true; CP7Zin1S/w AXH4jQw ]QtdT8~ for(int i=0;i<nStartPos.length;i++) 5[al^'y { /6gqpzum4 if(!fileSplitterFetch.bDownOver) )KaQ\WJ: { Zu$f-_" breakWhile = false; /!eC;qp;[ break; {3$ge } C&NoEtL>s } ?)",}XL6 if(breakWhile) R{8nR00|1 break; 3`n5[RV 3+{hO@O WWrDr //count++; !!o69 //if(count>4) 5A7!Xd // siteStop(); |42E'zH& } u&STGc[ <hZA$.W3 6@wnF>'/\ System.err.println("文件下载结束!"); 6.EfM^[ } )UI T'*ow catch(Exception e){e.printStackTrace ();} UrH^T;# } *B)>5r &%fy g5V9fnb!d //获得文件长度 w/d9S(
public long getFileSize() X~ P0Q { [k@D}p
x int nFileLength = -1; @gE
+T37x2 try{ ok-sm~ bp URL url = new URL(siteInfoBean.getSSiteURL()); n4> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >`5iq.v httpConnection.setRequestProperty("User-Agent","NetFox"); n2Dnpe: O(~`fN?n Q'*-gg&) int responseCode=httpConnection.getResponseCode(); }}cVPB7 if(responseCode>=400) BtBy.bR { fk*JoR.o processErrorCode(responseCode); >f'nl return -2; //-2 represent access is error ^-~.L: }q } .Ky<9h.K fT[6Cw5w` gO*cX& String sHeader; qnrf%rS O*H:CW MZ=U}
&F for(int i=1;;i++) }UXj|SY { x@v,qF$K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); WB6g i2 //Utility.log(in.readLine()); KT{<iz_ sHeader=httpConnection.getHeaderFieldKey(i); RNRMw;cT if(sHeader!=null) E0ud<'3< { /B|#GJ\\3 if(sHeader.equals("Content-Length")) #c+N}eX{ { QMy;?, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
*ErTDy(
break; aZ*b"3 } ~<Gs<c}z } 9s73mu`Twg else 6M"J3\
x break; dvyE._/v } u\^<V) } Iy8gQdI catch(IOException e){e.printStackTrace ();} K?-K<3]9f catch(Exception e){e.printStackTrace ();} 45/f}kvy O5Yk=-_m c*~/[:} Utility.log(nFileLength); 7R7g$ Te$/[`<U S &s7] return nFileLength; lH:TE=|4 } Z:O24{ro5 BB--UM{7 %lv2 ;- //保存下载信息(文件指针位置) 6}C4 SZ private void write_nPos() U+@yx>! { 8Dhq_R'r try{ eJ'2CM6 output = new DataOutputStream(new FileOutputStream(tmpFile)); Jc`LUJT output.writeInt(nStartPos.length); Ip.5I!h[Xb for(int i=0;i<nStartPos.length;i++) Q`5jEtu#, { *:
e^yi // output.writeLong(nPos); |oSyyDYWP
output.writeLong(fileSplitterFetch.nStartPos); FLEf( output.writeLong(fileSplitterFetch.nEndPos); :/~`"`#1 } Haj`mc!<D0 output.close(); >bz}IcZP } IJS9%m# catch(IOException e){e.printStackTrace ();} }`5%2iG catch(Exception e){e.printStackTrace ();} fAUtqkB } "uTzmm$ .}SW`RPk fhMtnh: //读取保存的下载信息(文件指针位置) Bq79Ev
.- private void read_nPos() ptb t { %?X~, try{ zJ|Ek"R. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1kb?y4xeJ int nCount = input.readInt(); nHD4J;l nStartPos = new long[nCount]; F3H)B: nEndPos = new long[nCount]; pA(@gisg for(int i=0;i<nStartPos.length;i++) *Z|!%C { <G 2;nvRr nStartPos = input.readLong(); 3t68cdFlz nEndPos = input.readLong(); 2~R"3c+^ } Z(/jQ=ozQ input.close(); vB/MnEKR } R/ l1$} catch(IOException e){e.printStackTrace ();} ouVR[w>V catch(Exception e){e.printStackTrace ();} kn+`2-0 } jl3RE|M\< wbd>By(T1 {-Yp~HQF private void processErrorCode(int nErrorCode) 9y.C])(2 { C<qJnB:B9 System.err.println("Error Code : " + nErrorCode); h(GgkTj4+ } ],qG!,V ^YenS6`F FK@rZP //停止文件下载 j\@s pbE@ public void siteStop() iknB c-TLD { )3h=V^rm bStop = true; Q&`$:h.~ for(int i=0;i<nStartPos.length;i++) LtejLCf/ fileSplitterFetch.splitterStop(); f
IQ$a> !?O:%QG z[ z'.{;D } p*#SSR9< } [7|}h/ //负责部分文件的抓取 =]-! **FileSplitterFetch.java c!{.BgGN */ pR`.8MMc8 package NetFox; F~W*"i+EZ ,dzbI{@6 2#T|+mKxZM import java.io.*; Zp-
Av8 import java.net.*; r{>tTJFD(: P0'
;65 kl3#&>e public class FileSplitterFetch extends Thread { &Vnet7LfU k5g\s9n] CM9+h;Zm String sURL; //File URL `j_R ?mY long nStartPos; //File Snippet Start Position <|
Xf4. long nEndPos; //File Snippet End Position $'?CY)h{ int nThreadID; //Thread's ID jpm}EOq<% boolean bDownOver = false; //Downing is over VaVKWJg$ boolean bStop = false; //Stop identical L!mQP FileAccessI fileAccessI = null; //File Access interface akJ{- mQVduG 1m}'Y@I public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException F4kU) i { &rcr])jg[ this.sURL = sURL; W
86S)+h this.nStartPos = nStart; 'qQDM_+ this.nEndPos = nEnd; !Aunwq^ nThreadID = id; ?D57HCd`n fileAccessI = new FileAccessI(sName,nStartPos);//定位 \m5:~,p= } <C#
s0UX 1PLKcU I>L
lc Y public void run() jqb,^T|j;m { Zu&trxnNf[ while(nStartPos < nEndPos && !bStop) xhg{!w { d@,q6R}!MP JXUO?9 9dqD(S#C;" try{ 2=F_<Jh|+ URL url = new URL(sURL); I?bL4u$\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %b@>riR(y httpConnection.setRequestProperty("User-Agent","NetFox"); LO#{ String sProperty = "bytes="+nStartPos+"-"; rLh490@ httpConnection.setRequestProperty("RANGE",sProperty); ,_\h)R_ Utility.log(sProperty); <0v'IHlZ8 .N/4+[2p( /~gM,* InputStream input = httpConnection.getInputStream(); R;I}#b cJ //logResponseHead(httpConnection); 6<rc]T'| "i_tO+ iLv"ZqGrw byte[] b = new byte[1024]; ^4 es int nRead; 5>h2WL while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pA+Qb.z5z { -lb}}z+/ nStartPos += fileAccessI.write(b,0,nRead); X903;&Cim //if(nThreadID == 1) _I5p
7X // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '
nf"u } .(1=iL_3e <C${1FO7If ?G!^|^S* Utility.log("Thread " + nThreadID + " is over!"); nez5z:7F bDownOver = true; g.F{yX] //nPos = fileAccessI.write (b,0,nRead); F^A1'J } +/x|P- catch(Exception e){e.printStackTrace ();} ~X`vRSrH } f4!^0%l } #'$CC<*vy iDHmS6_c r)U9u 0 //打印回应的头信息 pxDZ}4mOh public void logResponseHead(HttpURLConnection con) &(Xp_3PO { \Cx3^
iX for(int i=1;;i++) ->8n.!F} { Jv7 @[<$ String header=con.getHeaderFieldKey(i); El"XF?OgpP if(header!=null) DU}q4u@) //responseHeaders.put(header,httpConnection.getHeaderField(header)); !X[lNtO Utility.log(header+" : "+con.getHeaderField(header)); IO v4Zx<) else p)TH^87 break; 'y'>0'et } Eptsxyz{ } , aawtdt/ Ix1ec^?f Zh3]bg5 public void splitterStop() 3bE^[V8/ { VMHiuBz: bStop = true; $JX_e } %,6@Uu#%6 N_/&xHw 0FEb[+N } QbOmJQ QD\S E RsTpjY*Xb /* 3 5|5|ma **FileAccess.java *dUnP{6 g *//文件访问(定位,写) DrMcE31 package NetFox; w
:^b3@gd import java.io.*; [DjdR_9*I E.6^~'/ {
"$2 public class FileAccessI implements Serializable{ Kpj0IfC,10 d*q_DV //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y6:=2(]w<p RandomAccessFile oSavedFile; `@Kh>K long nPos; {/#?n[" atl0#F Bd &yVii^ public FileAccessI() throws IOException ;'=!Fv { K})j5CJ/ this("",0); {yspNyOx } /\#qz.c2K N;Hf7K 1*>a public FileAccessI(String sName,long nPos) throws IOException S1`+r0Fk~n { 2"V?+Hhz oSavedFile = new RandomAccessFile(sName,"rw"); yDy3;*lE this.nPos = nPos; /xf%Rp4} oSavedFile.seek(nPos); QM;L>e-ZY } vQBfT% &Q- W dIr3 sVh!5fby& public synchronized int write(byte[] b,int nStart,int nLen) kFuaLEJi { gI\J sN int n = -1; 3+n&Ya1 try{ 3R4-MK oSavedFile.write(b,nStart,nLen); n%"s_W'E n = nLen; ,`-6!|: } ~rn82an@G catch(IOException e) )G*Hl^Z;4 { eJ7A.O e.printStackTrace (); 3n6_yK+D } *h-nI= W.0dGUi* VQqEsnkz return n; UN,@K9 } !7 *X{D v 4fpz;2% B.&q]CAv- } `<\AnhNW]I T(3"bS., eeB^c/k(P /* .&}}ro48 **SiteInfoBean.java sfVtYIu */ 8 wC3}U package NetFox; pN%L3?2 >rYP}k ]u2!)vZh' public class SiteInfoBean { (A( d]l
D&N5) t3U*rr|A private String sSiteURL; //Site's URL nC[L"%E|se private String sFilePath; //Saved File's Path zL)m!:_ private String sFileName; //Saved File's Name trgj]|?M private int nSplitter; //Count of Splited Downloading File DSET!F;PG Kw-E%7gh4c ^5"s3Qn public SiteInfoBean() W@pVP4F0xM {//nSplitter的缺省值为5 2/>AmVM //default value of nSplitter is 5 ,v)@&1Wh: this("","","",5); .sjM$#V= } 4[+n;OI ]S%qfna e1 F=d#$-yg public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) CS6,mX { =b !f sSiteURL= sURL; 5:56l>0 sFilePath = sPath; #l:qht sFileName = sName; ]j_S2lt this.nSplitter = nSpiltter; hc~--[1c: Hh54&YKZ m0un=>{ } 6!b9 6bV 6,s@>8n \zgRzO'N public String getSSiteURL() gpE5ua& { xN2{Vi{ad return sSiteURL; $IB@|n } f]o DZO%^ 9e8@0?0 oa;[[2c public void setSSiteURL(String value) wf8vKl#Kfw { - +
$u sSiteURL = value; w 7=Y_ } 37M7bB0 QGLfZvTT &o:ZOD. public String getSFilePath() / ^!(rHf {
4[bw/[ return sFilePath; m6'YFpf)V } "L{;=-e oPre$YT}h $@Hw DRP public void setSFilePath(String value) "kf7??Z { m,*t}j0 7 sFilePath = value; 1Pn!{ bU3@ } ;~/ o+6Y/6Xp@ 1VJE+3 public String getSFileName() ,n&Dg58K { G7zfyw}W return sFileName; C"hc.A&4 } gKS^-X{x
tTQ>pg1{qh PjRKYa_U public void setSFileName(String value) 3tOnALv { QE-t v00 sFileName = value; l2n>Wce9 } I>ofSaN 8kO|t!?:U b4,yLVi<T public int getNSplitter() tEf-BV;\y { 2R|2yAh return nSplitter; 0/-[k } R,6?1Z:J EeL~`$f !~>u\h public void setNSplitter(int nCount) :Wb+&|dU { EY> %#0 nSplitter = nCount; kiqq_`66 } .F%RW8=Q } : @YZ6?hf i,b>&V/Y$ #(XP=PUj /* 3MkF **Utility.java ?i9LqHL */ zb:p,T@5 package NetFox; @GjWeOj] p/SJt0 Q,)G_lO public class Utility { Yckl,g_ srg#<oH|{c ~#(bX]+A public Utility() 5n?fZ?6( { 6;5}%
B:#h xr.fZMOh4 }bjTb! } .5_w^4`b 7\5 [lM //线程睡眠 Pu}r`
E_ public static void sleep(int nSecond) #!Kg?BR2 { b"{7f try{ Uv5E$Y"e10 Thread.sleep(nSecond); O:k@'& } ]6}|X#_ catch(Exception e) F<G.!Y8!& { z[CCgs&vqe e.printStackTrace (); `[CXxp } /UM9g+Bb } W}JJaZR*X njvmf*A?S //日志 wGb{O public static void log(String sMsg) %Z.>)R4 { udW,
P System.err.println(sMsg); ?XW+&!ar } 3}Uae#oy HLTz|P0JZ 2Ni2Gkf@
public static void log(int sMsg) =}_c=z?UY { *i)GoQoB System.err.println(sMsg); &bA;>Lu#|o } [(UQQa=+ } uw;s](~E H^'EY:| tAYu|\] /* fZXd<Fg+ **TestMethod.java [=.. #y!U */ N[r@Y{ package NetFox; ygT,I+7\ /m9t2,KB PvKe|In( public class TestMethod { TC J\@|yw .6 ,!bOzth2>K public TestMethod() iTxn { ///xx/weblogic60b2_win.exe =:9n+7~$
try{ ;jI\MZ~l\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); M.H4ud //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,>"1'i&@ SiteFileFetch fileFetch = new SiteFileFetch(bean); *4=Fy:R]O fileFetch.start(); Vv6xVX } 4}#*M2wb catch(Exception e){e.printStackTrace ();} J&
yDX> }]tSWVb* {s_0[> } b!_l(2 d p_J*8 oLB pG1Va public static void main(String[] args) WMl_$Fd6 { $c f?`k new TestMethod(); ^3AJYu } -/7[_, } Tcr&{S&o 点击下载更多相关资料
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