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/* 10$:^ **SiteFileFetch.java SW=%>XKkh */ kI/%|L%6D package NetFox; FO?I}G22 import java.io.*; <u2iXH5w import java.net.*; bE2{^5iG Q&?B^[N*Q GlaZZ, public class SiteFileFetch extends Thread { #oEq)Vq>g| (eO_]<wmky q4ej7T8 SiteInfoBean siteInfoBean = null; //文件信息Bean @{x+ln1r long[] nStartPos; //开始位置 ;Yn_*M/* long[] nEndPos; //结束位置 P!~B07y FileSplitterFetch[] fileSplitterFetch; //子线程对象 jQ5FvuNOy long nFileLength; //文件长度 #5_pE1 boolean bFirst = true; //是否第一次取文件 7kQ,D,c' boolean bStop = false; //停止标志 -|_io,eL; File tmpFile; //文件下载的临时信息 Fo&ecWhw DataOutputStream output; //输出到文件的输出流 kud2O>> &A~(9IV //负责整个文件的抓取,控制内部线程(FileSplitterFetch类)
-(|}:J public SiteFileFetch(SiteInfoBean bean) throws IOException t2&} { 73(5.'F siteInfoBean = bean; %)j^>W5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); dhI+_z tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mbZg2TTy if(tmpFile.exists ()) q@iZo,Yk { =lS@nRH bFirst = false; o)Nm5g read_nPos(); 5C"A*Fg?; } 2T}FX4' else *mfPq"/ { Aq{7WA nStartPos = new long[bean.getNSplitter()]; a: [m; nEndPos = new long[bean.getNSplitter()]; UJGmaE } a8r+G]Z 1Yy*G-7} dF0:'y Kw,ln<)2 } }#9 |au` `pYL/[5 3Tr}t.mt public void run() ,:"c" { KPs
@v@5M //获得文件长度 M@O<b- //分割文件 d,%@*v]S //实例FileSplitterFetch S3_QOL //启动FileSplitterFetch线程 u^&,~n@n7 //等待子线程返回 4L[-[{2 try{ v@
OM if(bFirst) _c6 zzGtH { Lcy>!3q3~ nFileLength = getFileSize(); `jH 0FJQ if(nFileLength == -1) ?&r>`H E { vA,tW, System.err.println("File Length is not known!"); "AMsBvzgo } s h^&3} else if(nFileLength == -2) 5 }F6s { >`+-Yi$(\ System.err.println("File is not access!"); 407;M%?'A } T|lyjX$Q]9 else zd#/zUPI { t^@4n&Dg for(int i=0;i<nStartPos.length;i++) 0Kenyn4 ? { &\s>PvnquX nStartPos = (long)(i*(nFileLength/nStartPos.length)); "Kt[jV;6 } 8??%H7~ for(int i=0;i<nEndPos.length-1;i++) qGc>+!y { MA5BTq<& nEndPos = nStartPos[i+1]; ?3Dsz } vCtag]H2@ nEndPos[nEndPos.length-1] = nFileLength; 6d|%8.q1 } >,%7bq=T! } N^&T5cAC NuKx{y}P oi}\;TG //启动子线程 `(?x@Y>.Ht fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .=-K7.X.) for(int i=0;i<nStartPos.length;i++) @X*r5hjc { L~xzfO fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bLi>jE.%. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), E>6:59+ nStartPos,nEndPos,i); e8<[2J)P& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z hFk84 fileSplitterFetch.start(); BFyVq } $2\k| @)s // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), YC0FXN V siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); *FEY"W+bY // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 9Fm><,0'u nEndPos = " + nFileLength); LXQ-J // fileSplitterFetch[nPos.length-1].start(); Gm1vVHAxv :i ft{XR' l<#*[TJ //等待子线程结束 a
uz2n //int count = 0; 1u0NG)*f //是否结束while循环 j(maj boolean breakWhile = false; u6(>?r- &MsBcP[ SZQ4e while(!bStop) )51H\o { 8y,
]>n write_nPos(); xkzC+ _A Utility.sleep(500); b bO1`b- breakWhile = true; N/fH% AtM t'0dyQ%u `[5QouPV for(int i=0;i<nStartPos.length;i++) 7T3ub3\ { +#! !
'XP if(!fileSplitterFetch.bDownOver) 5=--+8[ bV { lj!f\C}d breakWhile = false; H|iY<7@ break; g+98G8R } ?5L.]Isa5 } [1*3 kt*h if(breakWhile) s$ 2@ |; break; Qm X(s N yK7TKui p7;/| ]o3 //count++; Ih.6"ISK} //if(count>4) 8Dq;QH} // siteStop(); ,??%["R } C%csQ m l;dZJ_Ut$ Ysk,9MR(F System.err.println("文件下载结束!"); MMfcY
3#% } C +%&!Q catch(Exception e){e.printStackTrace ();} zU'\r~c } &&;ol}W ]'F{uDm[ 5Go&+|c vJ //获得文件长度 }bVWV0Aeim public long getFileSize() ''f07R { L@|W&N;%a int nFileLength = -1; XKU+'Tz try{ }'KVi=qnHb URL url = new URL(siteInfoBean.getSSiteURL()); VBIY[2zf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); x^|J- httpConnection.setRequestProperty("User-Agent","NetFox"); e:Zc- 0pS|t/h0 0NB6S&lI^k int responseCode=httpConnection.getResponseCode(); lr[a~ca\ if(responseCode>=400) ~_Tm S9 { xPY/J#X$ processErrorCode(responseCode); 38%xB<Y return -2; //-2 represent access is error E Cx_
[|3{ } Dm j^aFB0| F-)lRGw zOpl#%" String sHeader; bg'B^E3 Fs_umy# wR?M2*ri for(int i=1;;i++) -k
p~pe*T { ,))UQ7N //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); [UVxtM J //Utility.log(in.readLine()); $C UmRi{T sHeader=httpConnection.getHeaderFieldKey(i); |yi3y `f if(sHeader!=null) Ok+zUA[Wu { 9K@>{69WQ if(sHeader.equals("Content-Length")) FBM 73D@` { N;A#3Ter nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U/2g N
H break; ]Ph~-O } eiJO;%fl>l } -}m#uUqI else 4'W| '4'b break; &t+ } \guZc}V]:\ } .[hQ#3)W catch(IOException e){e.printStackTrace ();} %6}S'yL catch(Exception e){e.printStackTrace ();} j[XA"DZR< 8z^?PZ/ R$&|*0
Utility.log(nFileLength); 0KyujU?sF A/N$ qwu++9BM return nFileLength; ~ySmN}3~' } r3l}I6 bh&,*Y6= @^y/V@lDm //保存下载信息(文件指针位置) ~y}M
GUEC private void write_nPos() K h9 $ { :z^ps0 try{ :".:Wd output = new DataOutputStream(new FileOutputStream(tmpFile)); ObIi$uJX output.writeInt(nStartPos.length); S<f&?\wK=v for(int i=0;i<nStartPos.length;i++) w~EXO;L2 { z= -u89] // output.writeLong(nPos); mf'N4y% output.writeLong(fileSplitterFetch.nStartPos); oh`I$ output.writeLong(fileSplitterFetch.nEndPos); `e0U-W]kF } sB_o
HUMH6 output.close(); !ZbNW4rIP } n37C"qJ/i catch(IOException e){e.printStackTrace ();} ]<q{0. catch(Exception e){e.printStackTrace ();} K6kPNi } kx'ncxN~ :b;2iBVB YNbs*i& //读取保存的下载信息(文件指针位置) zh'TR$+\hO private void read_nPos()
/I
{ =y8HOT}8 try{ EH"iK2n\9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); pvTV* int nCount = input.readInt(); #lQbMuR nStartPos = new long[nCount]; }$V]00
X nEndPos = new long[nCount]; !%NxSJ for(int i=0;i<nStartPos.length;i++) j-ugsV`2=* { -9/YS nStartPos = input.readLong(); 6rL'hB!!]* nEndPos = input.readLong(); j4le../N } Qp<?[C}'W input.close(); TH/!z,(> } yw5MlZ4P= catch(IOException e){e.printStackTrace ();} 4hztYOhJ{ catch(Exception e){e.printStackTrace ();} Hjli)*ev } M|FwYF^ jK\2y|&&c K;G1cFFyG private void processErrorCode(int nErrorCode) \~Zj](# { ;C-5R U
V System.err.println("Error Code : " + nErrorCode); m?xzx^xs/ } !,Wd$UK BnqAv xX =2bW"gs
I //停止文件下载 JGSeu =) public void siteStop()
}nYm^Yh { SY["(vP%# bStop = true; e%N\Pshgv for(int i=0;i<nStartPos.length;i++) Z?[;Japg fileSplitterFetch.splitterStop(); "j3Yu4_ks |Wj)kr !| SxC$EQgL } $I-$X? } N7%Jy?-+ //负责部分文件的抓取 bXc7$5(!VB **FileSplitterFetch.java 7i~::Z < */ GY<Y, package NetFox; [+gX6 P$2J`b[H$ 2Y&z}4'j import java.io.*; 8 +xLi4Pw import java.net.*; WE4:Jy iBxCk^ B+ GPTQSTb public class FileSplitterFetch extends Thread { WW@/q`h jfl7L"2 AZorz Q]s String sURL; //File URL Y:G6Nd
VFM long nStartPos; //File Snippet Start Position B8Jev\_ long nEndPos; //File Snippet End Position 0gHJ%m9s int nThreadID; //Thread's ID w@.E}%bwq boolean bDownOver = false; //Downing is over A2Rr*e boolean bStop = false; //Stop identical I'BoP FileAccessI fileAccessI = null; //File Access interface 2j H` 8;p6~&).C~ uwQ{y>SG public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException J7emoD[ { O~9
%!LAu this.sURL = sURL; %fh
,e5(LT this.nStartPos = nStart; =9y'6|>l this.nEndPos = nEnd; ;%]Q%7 nThreadID = id; \Yz>=rY fileAccessI = new FileAccessI(sName,nStartPos);//定位 1]fqt[*) } :cG_aOkid sqei(OXy i5|A\Wv" public void run() ~m[^|w { @pY AqX2 while(nStartPos < nEndPos && !bStop) )#T(2A { :74^? (E&}SI~ 2y#4rl1Utx try{ C#p$YQf URL url = new URL(sURL); 9Q^>.^~^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ne@Iv)g? httpConnection.setRequestProperty("User-Agent","NetFox"); v/8K?$"q String sProperty = "bytes="+nStartPos+"-"; tn6\0_5n httpConnection.setRequestProperty("RANGE",sProperty); Jm\'=#U# Utility.log(sProperty); 0^]E-Zf
,L\OhT 7&:gvhw InputStream input = httpConnection.getInputStream(); JE9|;A //logResponseHead(httpConnection); vC$[Zm QZ"Lh s8{3~ Hv byte[] b = new byte[1024]; +G?4Wc1 int nRead; -#Yg B5 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9O?.0L { 8Y
sn8 nStartPos += fileAccessI.write(b,0,nRead); Vg\EAs>f //if(nThreadID == 1) D^04b<O<x // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f 7y1V(t } 0D/j2cT("k k:Uyez ;6L<Syl5 Utility.log("Thread " + nThreadID + " is over!"); 0DIaXdOdW+ bDownOver = true; n+rAbn5o$ //nPos = fileAccessI.write (b,0,nRead); xI<Dc*G } hBLJKSv catch(Exception e){e.printStackTrace ();} IJs*zzR } g/mVd;#o } q3VE\&*^F OlRBvfoh8 k^p|H: //打印回应的头信息 MH 'S,^J public void logResponseHead(HttpURLConnection con) Mm:6+ { .O3i"X] for(int i=1;;i++) pYI`5B4 { g>_6O[;t% String header=con.getHeaderFieldKey(i); (pH13qU5 if(header!=null) >72j,0=e //responseHeaders.put(header,httpConnection.getHeaderField(header)); X{9D fgW Utility.log(header+" : "+con.getHeaderField(header)); PX(.bP2^Lq else j S')!Wcu break; =KmjCz: } -G(z!ed } +su>0'a giyKEnP KU"?ZI public void splitterStop() y!1%Kqx1,n { ]V<[W,*(5 bStop = true; lHV
bn7 } pTST\0? {Rc/Ten &%>l9~F'~ } s59v*
/ z=N'evx~ AVOzx00U /* {e<J}-/? **FileAccess.java (%oZgvM *//文件访问(定位,写) ,`^B!U3m package NetFox; 8,a&i:C import java.io.*; 9<.FwV> 7F>5<Gv:-
3:PBVt= public class FileAccessI implements Serializable{ iJZqAfG{m? ;jfjRcU //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0X~
RandomAccessFile oSavedFile; T3@wNAAU long nPos; $`i$/FE b~Y$!fc g*N~r['dZ public FileAccessI() throws IOException R KFz6t { % rRYT8 this("",0); m_W\jz??k } ;? '`XB! %q;3bfq@N 8%_XJyg public FileAccessI(String sName,long nPos) throws IOException [kt!\- { 9Y&n$svB oSavedFile = new RandomAccessFile(sName,"rw"); fv5'Bl this.nPos = nPos; M+gQN}BAr oSavedFile.seek(nPos); ;'`T } [`Ol&R4k d8C?m*3J !?DPI) public synchronized int write(byte[] b,int nStart,int nLen) 4+:Q" { );kO27dg int n = -1; aG%KiJ7KEN try{ qy`@\)S/5 oSavedFile.write(b,nStart,nLen); Ih ;6(5z n = nLen; `ihlKFX } u&I?LZ-=, catch(IOException e) TKx.`Cf
m { 7ib~04 e.printStackTrace (); _SY<(2s]B } Gx|$A+U jF<Y,(C\ rqxoqc Z return n; mEa\0oPGB } k_r12Bu :2^%^3+V KqP!={>" } SuB;Nb7r` JX7_/P |qH -^b.F /* Sqed* **SiteInfoBean.java Lp5LRw */ >to NGGU=~ package NetFox; lE78Yl] UA!-YTh AY5%<CWj8 public class SiteInfoBean { .5 p"o-:D G!RbM.6 mQ;b'0& private String sSiteURL; //Site's URL M n`gd# private String sFilePath; //Saved File's Path rZLTai}`>
private String sFileName; //Saved File's Name |_&vW\ private int nSplitter; //Count of Splited Downloading File v,bes[Ik [M 65T@v ^Y8?iC<+ public SiteInfoBean() b6RuYwHWV0 {//nSplitter的缺省值为5 O]DZb+O" //default value of nSplitter is 5 Zgkk%3'^' this("","","",5); M/x49qO# } ( MWh|kp eGHxiC ^ b{0|: public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J(ZYoJ { ]OL
O~2j sSiteURL= sURL; 7<*sP%6bD sFilePath = sPath; 0UB)FK,9 sFileName = sName; %"r3{Hs this.nSplitter = nSpiltter; (TM1(<j 7;:R\d6iL &|'1.^f@;E } #K.OJJaG 12U1DEd>- 0k>bsn/j public String getSSiteURL() QFY1@2EC { \L>3E#R-Q return sSiteURL; RZ#b)l } 5<wIJ5t 1//d68*" F.i*'x0u public void setSSiteURL(String value) i+( k { }dQW-U sSiteURL = value; L:nZ_O; } pUutI|mt/ g
VX bCHJLtDQ public String getSFilePath() m/Ou$ { cK%Sty'8+ return sFilePath; .|^L\L(! } 1v)ur\>R [`Seh $ M>nplHq
public void setSFilePath(String value) tGDsZ;3Yr { LG0+A}E=C sFilePath = value; a'u:1C^\ } C ?JcCD2 XZde}zUWn piIj
t public String getSFileName() VRQ'sn@ { [0<N[KZ) return sFileName; T}d%X MXq } P&@ 2DI3m i}"Eu<
P 1O3"W;SR<: public void setSFileName(String value) _;/onM { LI1OocY.] sFileName = value; i eQQ{iGJH } 4WU%K`jnXb
b)/, aqJ>l}{ public int getNSplitter() mX66}s}# { 6..G/,TB return nSplitter; :ZX#w`Y } D]X&Va 1(t{)Z< -i*{8t public void setNSplitter(int nCount) RG[b+Qjn { qp$Td<'Y nSplitter = nCount; 8 :B(}Y4K } *{[jO&&J } Hj\>&vMf KnK8\p88\ 7.U
CX" /* MG6taOO! **Utility.java 4+46z| */ ZyAm:yO package NetFox; jyB^a;- 1 ? be o+Cd\D69S public class Utility { "g}m xPe x[L/d"Wf >F7v'-*{ public Utility() vU|=" # { |hGi8 kD1[6cJ!=. +9Vp<( } )2vkaR X|]&K //线程睡眠 {Aq2}sRl{ public static void sleep(int nSecond) ))Q3;mI" { K`%{(^}. try{ C.su<B? Thread.sleep(nSecond); ,Hq*zc c } f-]5ZhM' catch(Exception e) ~d5f]6#` { q8 jI
y@ e.printStackTrace (); Igb@aGA } hHXTSk2 } (.D|%P BuwJR
Ql. //日志 3hUU$|^4gm public static void log(String sMsg) ]H[%PQ r`Z { :x*#RnRr. System.err.println(sMsg); U42B(ow } ?
}t[ {Ee[rAVGp lJ y\Ky(* public static void log(int sMsg) >2kjd { iH&BhbRu_ System.err.println(sMsg); ?-.Qv1hs6p } bSbUf%LKt } a[).'$S}' (c3%rM m] >U4hsr05 /* w&U>w@H^ **TestMethod.java 4<c#3] */ #@qd.,]2 package NetFox; ~m0l_:SF pXL@&]U+ b Ag>;e( public class TestMethod { j=>:{`*c /U1"P w]-,X` public TestMethod() H<YhO&D*u { ///xx/weblogic60b2_win.exe Ic!8$NhRS try{ L"Vi:zdp SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); "V7
SB //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s01W_P .@R SiteFileFetch fileFetch = new SiteFileFetch(bean); {Kdr-aC fileFetch.start(); vBRW5@ } s"jNS1B catch(Exception e){e.printStackTrace ();} T][r'jWQ cx_.+ R aNcuT,=(?8 } estDW1i) Qx{[#[Da (=de#wh2] public static void main(String[] args) 6<%W8m\ { e
9p + new TestMethod(); t93iU?Z } wfE%` 1 } Z{#;my*X| 点击下载更多相关资料
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