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/* *d%U]Hby, **SiteFileFetch.java IJnh@?BC */ 0/Q"~H?% package NetFox; X!'nfN import java.io.*; Adyv>T9 import java.net.*; "~-Y'O O:^m#:[cE YY? }/r public class SiteFileFetch extends Thread { W{JNNf6G >%PPp.R b0vbE8wa SiteInfoBean siteInfoBean = null; //文件信息Bean OvFWX%uY long[] nStartPos; //开始位置 hp:8e@ long[] nEndPos; //结束位置 h~F`[G/' FileSplitterFetch[] fileSplitterFetch; //子线程对象 "@h 5
SF long nFileLength; //文件长度 |N^z=g P[ boolean bFirst = true; //是否第一次取文件 ~wX4j boolean bStop = false; //停止标志 v<2B^(i}VB File tmpFile; //文件下载的临时信息 fBZ\, DataOutputStream output; //输出到文件的输出流 $hCPmiI BAUo`el5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !uno!wUIYd public SiteFileFetch(SiteInfoBean bean) throws IOException `;'fCO! { [>pqf siteInfoBean = bean; HJV8P2f8` //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); QqS?- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "-tTN if(tmpFile.exists ()) P@RUopu,i { lMcSe8LBQa bFirst = false; vW\|%
@hW, read_nPos(); [u=DAk?8 } K9BoIHo else TAXl73j_CY { ~582'-=+ nStartPos = new long[bean.getNSplitter()]; KPT@I3P nEndPos = new long[bean.getNSplitter()]; p]7Gj&a } ;4g_~fB p| #gn<z} O8J:Tw}M* UdSu:V| } C}~/(;1V= Rlq6I?S+ e>oE{_e public void run() fK$N|r { _:tclBc8R //获得文件长度 c=-2c&=& //分割文件 q|8p4X}/] //实例FileSplitterFetch "eH~/ 6A //启动FileSplitterFetch线程 c/c%-= //等待子线程返回 te+5@k#t try{ gUrb\X if(bFirst) TF@HwF"# { wq( m%F nFileLength = getFileSize(); /@*J\0h(- if(nFileLength == -1) O>![IH(L { 0M?nXHA[ System.err.println("File Length is not known!"); vGk}r } rLzYkZ else if(nFileLength == -2) >QusXD"L> { x_&m$Fh System.err.println("File is not access!"); -}ebn*7i\ } LqHeLN else <?TJ- { cZ"
Ut for(int i=0;i<nStartPos.length;i++) 's]+.3">L1 { B) 81mcy nStartPos = (long)(i*(nFileLength/nStartPos.length)); I:~L!% } z"eh.&T for(int i=0;i<nEndPos.length-1;i++) ?gSk%]S/! { ;,z^!bD nEndPos = nStartPos[i+1]; x+O}R D*G } @'EP$!c nEndPos[nEndPos.length-1] = nFileLength; UeRx ^ } Xcq9*!%o } kUJ\AK \w
6%J77 }G8RJxy //启动子线程 GXEOgf#i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /WDz;,X for(int i=0;i<nStartPos.length;i++) Lp \%-s#5s { k?.HW?=zy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lA4Bq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NLJD}{8Ot nStartPos,nEndPos,i); n7vLw7 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l|-TGjsX fileSplitterFetch.start(); (u]ajT } zXB]Bf3TH // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p6V`b'*> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); f77uqv(Y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Q#@gOn=W\ nEndPos = " + nFileLength); O=1uF // fileSplitterFetch[nPos.length-1].start(); c;w~ -7Q*| JH~v e o8P 5C4y //等待子线程结束 hfY
Ieb#91 //int count = 0; #lyvb.; //是否结束while循环 s0Ii;7fA{ boolean breakWhile = false; %J`; xDBEs* F<?e79},` while(!bStop) KJa?TwnC { ?ng?>! write_nPos(); 7"f$;CN?~ Utility.sleep(500); `07u}]d8 breakWhile = true; VI%879Z\e /Q"nQSG M* W=v for(int i=0;i<nStartPos.length;i++) o'Q)V { ^zGgvFf> if(!fileSplitterFetch.bDownOver) " 7!K'i { |}*k| breakWhile = false; %E7+W{?*1 break; :^SpKe(7 } ->}K- n ), } qEE3x>&T] if(breakWhile) Z*kGWL break; v@k62@; ~?vm97l :~^ec|tp //count++; qy@gW@IU //if(count>4) [E(DGt // siteStop();
-p>KFHj6 } ewgcpV|spn )J_!ZpMC rsfA.o System.err.println("文件下载结束!"); K0]'v>AWr } w\;=3C` catch(Exception e){e.printStackTrace ();} ?ZSG4La\ } &a8#qv"l I
TJ>[c]x `sN3iD!@R //获得文件长度 w2~(/RgO public long getFileSize() o lNL|WJ`w { `h S<F"
j int nFileLength = -1; 8N(bLGUG try{ bF'~&<c URL url = new URL(siteInfoBean.getSSiteURL()); 76)(G/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j:|60hDz^ httpConnection.setRequestProperty("User-Agent","NetFox"); mf@YmKbp -3VxjycY ~`hI|i<] int responseCode=httpConnection.getResponseCode(); R*TCoEKO if(responseCode>=400) 8N6a= [fv< { ^lu)'z%6 processErrorCode(responseCode); AnPm5i. return -2; //-2 represent access is error Xr M[8a } KLqu[{y.' !j4C:L3F "JVzv U] String sHeader; D +)6#i
Y P,iLqat )X\.Xr-6q for(int i=1;;i++) *@G4i { 5G){7]P+r" //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *^c4q|G.- //Utility.log(in.readLine()); v! @/ sHeader=httpConnection.getHeaderFieldKey(i); /^uvY if(sHeader!=null) N jq#@*>[p { 2O9dU 5b if(sHeader.equals("Content-Length")) ACl:~7; { \\hZlCV, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); M)EKS break; -5vc0"?E } z}C#+VhQ` } N,'JQch},8 else (L|SE4 break; 8+gx?pb } y%TR2CvT } 9qXHdpb#g" catch(IOException e){e.printStackTrace ();} M=o,Sav5* catch(Exception e){e.printStackTrace ();} I6y&6g yc]ni.Hz "XC6 l4Z Utility.log(nFileLength); wc bs-arH ;
tvB{s_ J~gfMp. return nFileLength; r.i.w0B( } lu(G3T8 }~QB2&3 ^#3$C?d //保存下载信息(文件指针位置) //ZB B,[@ private void write_nPos() f[.hN { ?]9uHrdsN} try{ .[1A output = new DataOutputStream(new FileOutputStream(tmpFile)); Q=PaTh
output.writeInt(nStartPos.length); U"m!f*a for(int i=0;i<nStartPos.length;i++) N%r}0 { c_ygwO3.Q // output.writeLong(nPos); aGpRdF1;! output.writeLong(fileSplitterFetch.nStartPos); zo} SS[ output.writeLong(fileSplitterFetch.nEndPos); Vg
\-^$ } a
_ output.close(); ~iwEhF } AF3t#)q catch(IOException e){e.printStackTrace ();} M8cLh!! catch(Exception e){e.printStackTrace ();} _"0n.JQg } 'hya#rC&( K7f-g]Ibdn |!!E5osXq //读取保存的下载信息(文件指针位置) lmmyDg1R private void read_nPos() [7I|8 { )&dhE^
O try{ cWRB=`=qz DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !+hX$_RT int nCount = input.readInt(); )&R;!#;5 nStartPos = new long[nCount]; ['R=@. nEndPos = new long[nCount]; hLm9"N'Pf for(int i=0;i<nStartPos.length;i++) M0]l!x#7 { 6J|f^W-fs nStartPos = input.readLong(); mu{%%b7|^ nEndPos = input.readLong(); =JVRm
2#* } IB!Wrnj? input.close(); o~4n8 } e#nTp b catch(IOException e){e.printStackTrace ();} p\-.DRwT` catch(Exception e){e.printStackTrace ();} iL,3g[g } :X4\4B*~ M9&tys[ KX ~ml\| private void processErrorCode(int nErrorCode) $s]@%6f { iMA) (ZS System.err.println("Error Code : " + nErrorCode); %BG5[XQ7 } _-!6@^+ CIaabn
Bp/8 >EO` //停止文件下载 w`7l;7[ public void siteStop() ,o}[q92@w { @H_LPn bStop = true; zcZw} for(int i=0;i<nStartPos.length;i++) WX=+\`NyJ( fileSplitterFetch.splitterStop(); P)\f\yb 3\WES! RsOK5XnQn } "LxJPt\ } @2$8o]et //负责部分文件的抓取 }`M6+.z3F **FileSplitterFetch.java @<6-uk3S */ X_YD[ package NetFox; V3+%KkN '~2v/[<`} Q`s(T import java.io.*; *
;M?R?+ import java.net.*; )xK!i. [`b{eLCFX] VuBp$H(U public class FileSplitterFetch extends Thread { mPD'" uf>w* [m5 >L;O, {Px- String sURL; //File URL Ucy9fM long nStartPos; //File Snippet Start Position ;C{_T:LS long nEndPos; //File Snippet End Position }GC{~
SZ4 int nThreadID; //Thread's ID aLq;a boolean bDownOver = false; //Downing is over 0=5i\*5 p boolean bStop = false; //Stop identical B~ez>/H^ FileAccessI fileAccessI = null; //File Access interface gU%GM 2?ednMoE wS^-o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v6n(<0: { T*ic?! this.sURL = sURL; c"$_V[m this.nStartPos = nStart; A+l" this.nEndPos = nEnd; s-ou ;S3s nThreadID = id; A^Zs?<C- fileAccessI = new FileAccessI(sName,nStartPos);//定位 POG5x } +OH."4Z V&nN/CF fE:2MW!)* public void run() [5 V { -s 1VlS/ while(nStartPos < nEndPos && !bStop) d{m0 uX56 { Fi`:G} Bx qCV%9o xV6j6k try{ hf-S6PEsM URL url = new URL(sURL); 3OZ}&[3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2uHp %fv; httpConnection.setRequestProperty("User-Agent","NetFox"); fI|1@e1 String sProperty = "bytes="+nStartPos+"-"; ?7+2i\L httpConnection.setRequestProperty("RANGE",sProperty); p[eRK .$! Utility.log(sProperty); [n"<(~ v uP1gem {HU48v"W InputStream input = httpConnection.getInputStream(); Cnr48ukq //logResponseHead(httpConnection); TGLXvP&
\ `otQ'e~+t *k}d@j,*" byte[] b = new byte[1024]; D5p22WY int nRead; FN
R&
: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) gkdjH8(2 { 3YRzBf:h nStartPos += fileAccessI.write(b,0,nRead); r__M1
!3 //if(nThreadID == 1) %Fv)$ :b // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IW#(ICeb } #n"/9%35f` Pla EI p 88K*d8m Utility.log("Thread " + nThreadID + " is over!"); S!]}}fKEFm bDownOver = true; (`p(c;"*C! //nPos = fileAccessI.write (b,0,nRead); /$=^0v+ } uprQy<I@ catch(Exception e){e.printStackTrace ();} Ame%:K!t } `jHGNi } fjFy$NX&> =jN]ckn WToAT;d2h //打印回应的头信息 ]*|K8&jxl public void logResponseHead(HttpURLConnection con) uz#9w\=" { cPbz7 for(int i=1;;i++)
ZS+2.)A { q|l|gY1g) String header=con.getHeaderFieldKey(i); ^bG!k]U!2 if(header!=null) 9PAp*`J@kr //responseHeaders.put(header,httpConnection.getHeaderField(header)); UPYM~c+} Utility.log(header+" : "+con.getHeaderField(header)); bqO"k t else 1#(1Bs6X break; -ZB"Yg$l } -,dQ&Qf? } :9b RuUm >g&`g}xZQ +*V;
f, public void splitterStop() 7yp*I[1Qf> { $#r(1 Ev bStop = true; )YFs } 1%,Z&@^j l_c?q"X lu_Gr=#O } 5o/rV.I Jy_'(hG d
eg>m?Y /* 8##jd[o&p~ **FileAccess.java Z-@}~#E *//文件访问(定位,写) !UTJ) & package NetFox; >$DqG$D import java.io.*; P `"7m- kR|y0V {K* ^ne8~
;Q public class FileAccessI implements Serializable{ 7,TWCVap ~|rkt`8p //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5WT\0]RUa RandomAccessFile oSavedFile; ' T]oV~H long nPos; `?x$J
6p dK: " kdCOcJB public FileAccessI() throws IOException s/M~RB!w { J~q+G this("",0); dI-5%Um } ydQS"]\g 16|S 0 ) d]EvC> public FileAccessI(String sName,long nPos) throws IOException .TC
`\mV { h86={@Le oSavedFile = new RandomAccessFile(sName,"rw"); w|C~{ this.nPos = nPos; aB^G oSavedFile.seek(nPos); t5h_Q92N }
Z<W6Avr E6:p ^A`( public synchronized int write(byte[] b,int nStart,int nLen) M;qL)vf
{ 5H+k_U int n = -1; lIg2iun[n try{ fh#_Mj+y oSavedFile.write(b,nStart,nLen); sE6J:m( n = nLen; \aIy68rH, } %%6('wi catch(IOException e) c'";36y { dH|^\IQ e.printStackTrace (); e-9unnk } C`wI6! e6lOmgHn5 K"7;Y#1g return n; K/`RZ! } )1Nnn RFY!o<
-G#k/Rz6 } sG2 3[t8 E]U0CwFtr `Xdxg\| /* KVxb"|[ **SiteInfoBean.java :-La
$I> */ fhKiG%i'l package NetFox; .To:tN# <C;>$kX sdYj'e:N public class SiteInfoBean { e oSM@Isu |SKG4_wGe z \>X[yNpA private String sSiteURL; //Site's URL J"/z?!)IB private String sFilePath; //Saved File's Path t<F]%8S private String sFileName; //Saved File's Name j#t8Krd] " private int nSplitter; //Count of Splited Downloading File ^G&D4uZ ?K {1S JZ/O0PW public SiteInfoBean() ii
y3 {//nSplitter的缺省值为5 BWdc^ //default value of nSplitter is 5 GA.bRN2CI2 this("","","",5); AUsQj\Nm% } Fx5d@WNa> 6L9[U^`@ d`uO7jlm public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) v9m;vWp { Tw;qY sSiteURL= sURL; WwtE=od sFilePath = sPath; yr2L sFileName = sName; \&&(ytL this.nSplitter = nSpiltter; ~49N /I'u/{KB `(/saq* } e>9Z:vY Yc`j )kKmgtj public String getSSiteURL() o Xi}@ { Du:p!nO return sSiteURL; YQV?S } An #Hb= s%[GQQ-N UXPegK! public void setSSiteURL(String value) Wk#h,p3 { E8_Le sSiteURL = value; R{uJczu } s^YTI\L
\ q%k(M[ a`b zFu{ public String getSFilePath() RE
$3| z { |W*@}D return sFilePath; %=9yzIjbAt } 5%?b5(mnD RefRoCD1 UlNfI}#X public void setSFilePath(String value)
1Dya?}3 { o.3YM.B# sFilePath = value; ]]=fA 4( } XL
PpxG !Nl.Vb M*|VLOo=v public String getSFileName() }"?nU4q;S { Zxc7nLKF~ return sFileName; (s$u_aq77 } ? x"HX|n !@<@QG- [Z5[~gP3 public void setSFileName(String value) -9>LvLU { zf3:<CRX5 sFileName = value; G/z\^Q } a=*ALd_&0 %7 v@n+Q 6UW:l|}4#2 public int getNSplitter() 9Ue7
~"= { uR:=V9O return nSplitter; Yi&-m} } m
io1kDq< =^Sw*[eiy Bhu@ 2KdA public void setNSplitter(int nCount) u-QO>3oY6 { 2zKo nSplitter = nCount; z_Wm
HB } Yn4)Zhkk } ,<$YVXe/ 9rTz N ~|'y+h89 /* xY2}Wr
j, **Utility.java XpgV09.EE */ | 7 m5P@X package NetFox; _}zo
/kDA z$c&=Q gX$0[
sIS. public class Utility { p,w|=@= c.(Ud`jc ZD)0P=% public Utility() 6Q2orn[ { ,2,SG/BB XLZ j B:?#l=FL } df4sOqU *H5PT //线程睡眠 CZJHE> public static void sleep(int nSecond) BbrT f"` { Y9i9Uc.] try{ Nmp>UE,7[ Thread.sleep(nSecond); -@ZzG uS( } \5'O.*pr catch(Exception e) %j*k { 4ZI!,lv* e.printStackTrace (); 3}B5hht"D } Km)X_}| } xd^&_P$= q%-&[%l //日志 .Vo"AuC} public static void log(String sMsg) vuR5}/Ev { ImWXzg3@{ System.err.println(sMsg); 3(!/["@7 } IXZ(]&we ~reQV6oQua .3{[_iTM public static void log(int sMsg) 2{t)DUs { {)B9Z
I{+A System.err.println(sMsg); CKv&Re } ^\M
dl } ,`<^F:xl \|2tTvW,0 \6 \hnP /* S3uyn78hI **TestMethod.java >|a\>UgC */ 3 ppuQQ package NetFox; Fweh =v >Hih g/IH|Z=A public class TestMethod { w]};0v&\~s )A="eW_> 9&jQ
35 public TestMethod() f}[H
`OF { ///xx/weblogic60b2_win.exe #P(l2 ( try{ ~ J0,)_b%* SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >P<z |8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); [ULwzjss#L SiteFileFetch fileFetch = new SiteFileFetch(bean); Zc-#;/b3T fileFetch.start(); )xB$LJM8 } dh&W;zs catch(Exception e){e.printStackTrace ();} 2m_'z 1"}B]5! br0u@G } p?Ed-
S sFLcOPj-% B?SNea,I4 public static void main(String[] args) k}D[Hp:m { _yj1:TtCNT new TestMethod(); 4,2(nYF } BwC<rOU } |*:tyP%m^ 点击下载更多相关资料
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