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/* ]"q9 ~ **SiteFileFetch.java =^ZDP1h/} */ IE]? WW5 package NetFox; <<WqL?8W import java.io.*; ^-nL!>FYY import java.net.*; c`,'[Q5(O U-+o6XX W=G8l% public class SiteFileFetch extends Thread { l;7T.2J'Z qL2!\zt>g E>_N|j)9 SiteInfoBean siteInfoBean = null; //文件信息Bean 1#tFO long[] nStartPos; //开始位置 !1m7^3l7j long[] nEndPos; //结束位置 8SGqDaRt FileSplitterFetch[] fileSplitterFetch; //子线程对象 |!m8JV|x long nFileLength; //文件长度 kLE("I:7 boolean bFirst = true; //是否第一次取文件 U\y:\+e l boolean bStop = false; //停止标志 ly9tI-E File tmpFile; //文件下载的临时信息 Nhf@Y}Cu DataOutputStream output; //输出到文件的输出流 e92,@ 2y`X) //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) KwAc Ga}J public SiteFileFetch(SiteInfoBean bean) throws IOException pGRk { aoUz_7 siteInfoBean = bean; 3kzO
VZ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); .RW&=1D6 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *(g0{V if(tmpFile.exists ()) eL" +_lW { @oKW$\ bFirst = false; k^@dDLr" read_nPos(); #IvHxSo& } .~O-
<P# else A'6-E{ { "UYlC0 S\ nStartPos = new long[bean.getNSplitter()]; HkPdqNC& nEndPos = new long[bean.getNSplitter()]; n:"0mWnL$y } l~Hu#+O
i"`N5 x1`4hB `eEiSf } w!_6* ]WYddiF vJj}$AlI public void run() <s=i5t
My5 { DFMf"_p //获得文件长度 ]!>tP,<`' //分割文件 H-iCaXT //实例FileSplitterFetch {zIcEN$ ~ //启动FileSplitterFetch线程 ##6u //等待子线程返回 Ak kth*p try{ )">uI\bi if(bFirst) oM^VtH=> { z!G?T(SpA nFileLength = getFileSize(); l@:&0id4I if(nFileLength == -1) ,K15KN.' { RF[Uy?es System.err.println("File Length is not known!"); \_)[FC@ } M{t/B-'4 else if(nFileLength == -2) :z-?L0C=0 { fl8eNiE| System.err.println("File is not access!"); .4J7 ^l } 9fy[%M else 7Y.mp9, { C1==a FD for(int i=0;i<nStartPos.length;i++) 3!op'X! { Y41b8.|P+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); kx%\Cz } o&$Of for(int i=0;i<nEndPos.length-1;i++) T@xaa\bzg { V'FKgzd nEndPos = nStartPos[i+1]; #Xk/<It } 8I~*9MUp nEndPos[nEndPos.length-1] = nFileLength; {nMCU{*k } soOfk!b } o'_eLp SaOOD-u mtf><YU //启动子线程 1RauI0d* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; BsR3$ for(int i=0;i<nStartPos.length;i++) _"t"orD6 { |RH^|2:x9Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,f~)CXNT? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), kl|m @Nxp nStartPos,nEndPos,i); BPSie0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [:/mjO K fileSplitterFetch.start(); ky{@*fg. } =d$m@rc0r // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iU|X/>k? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); x<5;# // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4D[(X=FSU nEndPos = " + nFileLength); !jR 1!i // fileSplitterFetch[nPos.length-1].start(); p'kB1)~| Jq:Wt+a qFp]jbU //等待子线程结束 Wb5n> * //int count = 0; [+!~RV_ //是否结束while循环 !jg<
S>S5 boolean breakWhile = false; f3*SIKi g*WY kv *|,ye5" while(!bStop) lQL/I[} { B$G9#G6pZ write_nPos(); 4|hfzCjMI Utility.sleep(500); 7g4IAsoD breakWhile = true; ~X-v@a |[@v+koq U9XOs)^ for(int i=0;i<nStartPos.length;i++) _=K\E0I.m {
uyoV) if(!fileSplitterFetch.bDownOver) 6 u,w { cS>xT cj breakWhile = false; c3)6{ break; }-@h H( } $e%m=@ga } RijFN.s if(breakWhile) {
3Qlx/6< break; g6H` uO t;
@T~% Dc3bG@K*G //count++; BSY7un+`: //if(count>4) km,@yU // siteStop(); nu X`>Oy } *>T@3G.{Rm `pXPF}T /~+j[oB System.err.println("文件下载结束!"); ?:7.3{|Aq } vv D515i catch(Exception e){e.printStackTrace ();} QSvgbjdE } nc?Oj
B (/|f6_9! *X2dS
{ //获得文件长度 iwfH~ public long getFileSize() ={I(i6 { }O:l]O` int nFileLength = -1; qJK6S4O] try{ U3p Mv|b URL url = new URL(siteInfoBean.getSSiteURL()); [ak[ZXC, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mpzm6Ieu httpConnection.setRequestProperty("User-Agent","NetFox"); oYX#VX mW#p&{ :+ AqY(Gz int responseCode=httpConnection.getResponseCode(); ~Dj_N$_+9 if(responseCode>=400) Lmc"qFzK { tj: >o#D processErrorCode(responseCode); O*1la/~m return -2; //-2 represent access is error fn.}LeeS> } N
lB%Qu b|U3\Fmc b(_PV#@$ String sHeader; 5xc-MkIRL `IK3e9QpcA eSSv8[u for(int i=1;;i++) 0*:4@go0}i { XtIY8wsP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6S?*z
`v //Utility.log(in.readLine()); (oB9$Zz!t sHeader=httpConnection.getHeaderFieldKey(i); $B@K if(sHeader!=null) #.<(/D+ { AeEF/* if(sHeader.equals("Content-Length")) bAL!l\&2 { A"T*uv| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T]?QCf break; p"q4R2_/jh } tH9BC5+r} } `BY&&Bv#? else vH vwH break; Nk shJ2 } %|3NCyJ*7 } 6M@m`c catch(IOException e){e.printStackTrace ();} Zc*gRC catch(Exception e){e.printStackTrace ();} ^4tz*i ]|/\Sd !Baq4V?KN Utility.log(nFileLength); vU,
]UJ} !,N),xG}~ cz$q~)I$ return nFileLength; Sv03="& } 0& ?/TSC !J+< M~o} l}mzCIw% //保存下载信息(文件指针位置) N2`u
]*"0 private void write_nPos() J/ ^|Y6 { 3,{tGNl| try{ /yL:_6c- output = new DataOutputStream(new FileOutputStream(tmpFile)); \:91BQP
c output.writeInt(nStartPos.length); ]73BJ for(int i=0;i<nStartPos.length;i++) \B
D'" { qGKQrb,K // output.writeLong(nPos); FrD,)Ad8Q output.writeLong(fileSplitterFetch.nStartPos); .{LJ output.writeLong(fileSplitterFetch.nEndPos); LxxFosi8 } #zc{N"! output.close(); j?P8&Fm< } ){XG%nC catch(IOException e){e.printStackTrace ();} JheF}/Bx catch(Exception e){e.printStackTrace ();} UZqk2D } V7i1BR8G .+hM1OF`x ""^.fh //读取保存的下载信息(文件指针位置) a
|+q:g0M private void read_nPos() 4)~GHb { i:,37INMt try{ lBnG!!VrWa DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); N}j^55M_] int nCount = input.readInt(); ;COZHj9b nStartPos = new long[nCount]; R?$Nl nEndPos = new long[nCount]; C!aK5rqhv for(int i=0;i<nStartPos.length;i++) |{H-PH*Iz { ~F9WR5}] nStartPos = input.readLong(); ^ql+l~ nEndPos = input.readLong(); Ga}&% } J2adA9R/, input.close(); kQMALS@R } tL~?)2uEN catch(IOException e){e.printStackTrace ();} hh>mX6A catch(Exception e){e.printStackTrace ();} ckPI^0A! } *$o{+YP xYCX}bksh M/mUY private void processErrorCode(int nErrorCode) CJu3h&Rp { |lhVk\X System.err.println("Error Code : " + nErrorCode); SmYY){AQ/ } F,-S&d \Q<Ur&J]% 0 SeDBs //停止文件下载 , *A', public void siteStop() *eo<5YUHt { wIT}>8o bStop = true; )Vb_0 n=^ for(int i=0;i<nStartPos.length;i++) ?[G!6 fileSplitterFetch.splitterStop(); -O-qEQd xl~%hwBd #7~M1/eH=t } C4~`3Mk } 2v6QUf //负责部分文件的抓取 DIurFDQSS **FileSplitterFetch.java Ge]2g0 */ ;f7;U=gl, package NetFox; ) b
vZ~t+^ v"&Fj #}rv) import java.io.*; Q@-7{3 import java.net.*; BI,j/SRK U,4:yc,)s a}+7MEUmZ/ public class FileSplitterFetch extends Thread { =@d IM 3+2&@:$t n)7olP0p String sURL; //File URL PDnwaK long nStartPos; //File Snippet Start Position zi*2>5g long nEndPos; //File Snippet End Position `2@t) : int nThreadID; //Thread's ID o(I[_oUy\ boolean bDownOver = false; //Downing is over 007SA6xq boolean bStop = false; //Stop identical [fU2$(mT+ FileAccessI fileAccessI = null; //File Access interface )MKzAAt~ ;hOrLy&O &T8prE? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException / 1jb8w' { ;O2r+n this.sURL = sURL; |?!Ew# w this.nStartPos = nStart; D+.h*{gD this.nEndPos = nEnd; a
N| MBX; nThreadID = id; :>.~"uWo{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 G2%%$7Jj } ^< ,Np+ I4Ys,n j6~#_t[ public void run() ]&3UF? { x-5XOqD{' while(nStartPos < nEndPos && !bStop) f-?00*T { M<,E[2op D 5q Cn^R k@eU #c5c try{ s wdW70 URL url = new URL(sURL); ,?+rM ; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "mnWqRpX httpConnection.setRequestProperty("User-Agent","NetFox"); F(8>"(C String sProperty = "bytes="+nStartPos+"-"; dE+xU(\,w httpConnection.setRequestProperty("RANGE",sProperty); Syn>;FX Utility.log(sProperty); 9'I
I! Uu9\;f J>P{8Aw InputStream input = httpConnection.getInputStream(); n:GK0wu.s
//logResponseHead(httpConnection); I-NzGx2u PF-7AIxs" 4425,AR byte[] b = new byte[1024]; *sqq] uD int nRead; .Z}ySd:X while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h'x|yy]@3 { Ch`XwLY9 nStartPos += fileAccessI.write(b,0,nRead); ;(Q4x"?I //if(nThreadID == 1) 6=kA // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D5]sf>~ } 8VJUaL@ xV'\2n=1T lK%pxqx Utility.log("Thread " + nThreadID + " is over!"); TE4{W4I bDownOver = true; <a |$Bl //nPos = fileAccessI.write (b,0,nRead); Ctxs]S tU% } SLL%XF~/Sb catch(Exception e){e.printStackTrace ();} J'O</o@e } Z@=1-l } wj/\!V! (z0S5#g
,x o[Yxh%T //打印回应的头信息 Da!A1|" public void logResponseHead(HttpURLConnection con) <LDVO'I0! { gRuNC=sR for(int i=1;;i++) A
e&t#,) { [0D( PV(n String header=con.getHeaderFieldKey(i); pq6}q($Rk if(header!=null) KDW%*%! //responseHeaders.put(header,httpConnection.getHeaderField(header)); Vh:%e24Z Utility.log(header+" : "+con.getHeaderField(header)); \cdNyVY else AHP_B&s,Qe break; lkK+Fm } @X_x?N } 2*-s3 >VK |A0LYKni ^0R.U+?+ public void splitterStop() 15_OtK { _PrK6M@"L bStop = true; .N8AkQ(Ok } <jT6|2' K*Zf^g
m #CoJ S[t } %^m6Q! &dZ-}.
af a3
<D1" /* pGz-5afL **FileAccess.java \~1M\gZP *//文件访问(定位,写) w:
~66 TCI package NetFox; q_5k2'4K import java.io.*; 716JnG> IMjnj|Fj Ns2M8 public class FileAccessI implements Serializable{ >&tPIrz &'4id[$9 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5YaTE<G RandomAccessFile oSavedFile; OWFLw long nPos; p q7G[ '$W@I s)#FqB8 public FileAccessI() throws IOException &IM;Yl { (Bd8@}\u_ this("",0); NH$a :> } SsfnBCVR tK6z#) @.T
'>;izr public FileAccessI(String sName,long nPos) throws IOException "o/:LCE { @ 9D, f oSavedFile = new RandomAccessFile(sName,"rw"); &,2h=H,M this.nPos = nPos; 7jT]J oSavedFile.seek(nPos); 1q<BYc+z } D(D:/L8T, Mo|[Muj8b <\GP\G public synchronized int write(byte[] b,int nStart,int nLen)
2J
=K\ L { LFob1HH*8 int n = -1; 9D++SU2:} try{ )f9f_^; oSavedFile.write(b,nStart,nLen); X>j% y7v n = nLen; O emi } } `:!mPNW# catch(IOException e) ~isrE;N1| { k/YEUC5 e.printStackTrace (); q?g4**C } m'k.R
j
yTwv2l;U r7/y'Y]O return n;
@dQIl# } I.TdYSB PI(;t9]b qz"di~ 7 } e )l<D) tM]~^U u
HqP b8 /* cS/\&%7u **SiteInfoBean.java x2/\%!mt */ a}ogNx package NetFox; &U ]L@]x xtYX}u fEE[huG public class SiteInfoBean { DcA{E8Y *,X;4?:, jIwz
G+)$P private String sSiteURL; //Site's URL 0P^RciC f private String sFilePath; //Saved File's Path (:Rj:8{ private String sFileName; //Saved File's Name AJt*48H*G private int nSplitter; //Count of Splited Downloading File "2q}G16K &{NN!X g-"@%ps public SiteInfoBean() x zu)``? {//nSplitter的缺省值为5 VVO C-: //default value of nSplitter is 5 P:vAU8d> this("","","",5); {/G~HoY1i } Ac}+Uq 13wO6tS
k [ZU6z?Pf public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]3]I`e{ { ^WQ.' G5Q sSiteURL= sURL; #qY`xH'> sFilePath = sPath; hp+=UnW sFileName = sName; )isz
}?Dj this.nSplitter = nSpiltter; NpqMdd 0>Iy`>] G vMhgG=D } F7lhLly SYd4 3PA "s[wLclfG public String getSSiteURL() 8)HUo?/3 { UZ7Zzc#g return sSiteURL; L#mf[a@pCn } HZC^Q7]hy fTd=}zY O_}R~p public void setSSiteURL(String value) NovF?kh2 { "/[xak!g sSiteURL = value; low
0@+Q } >Lj0B%^EvM =i[ _C>U Xc~yr\%] public String getSFilePath() xR}^~14Bz { U Hh return sFilePath; (~ro_WC/I } ,Z*&QR UngDXD ) a)w
* public void setSFilePath(String value) 4{4VC"fa { cB#5LXbCE sFilePath = value; *P2_l
Q= } 3gtQS3$4s ;Gixu9u' Pj(DlC7G, public String getSFileName() ChzKwYDY { C$?gt-tJ' return sFileName; L!G]i;=: } MJ "ug8N {2"8^; J=?`~?Vbo public void setSFileName(String value) 7u7`z% { B8A-|S!,U sFileName = value; zA/tHlKc } APY^A6^:j QS(aA*D ;PM(q<@\ public int getNSplitter() &[71~.Od {
K|[p4*6 return nSplitter; D>tex/Of3 } ,5}%_ @p`*MWU fNR2(8;} public void setNSplitter(int nCount) q,S[[{(" { -;]m4R)z nSplitter = nCount; V$wW?+V } 2OT
RP4U } 6L5j Q8-;w{% N,k PR /* xAJ
N(8? **Utility.java 9~3;upWu! */ v *'anw&Z package NetFox; aia`mO] HK}br!? 2S%[YR>> public class Utility { |q|?y`X4/ <46>v< Hwb+@'o public Utility() 1M@OBfB8 { VZveNz@]r zD}@QoB X=C*PWa7 } ?XCFRt,ol \e)>]C}h //线程睡眠 gR5
EK$ public static void sleep(int nSecond) jGm`Qg{< { ky4;7RK try{ `G/%U~ Thread.sleep(nSecond); )ZZjuFQJ) } wPr9N}rf catch(Exception e) Ygeg[S!7 { 8M6
Xd]{% e.printStackTrace (); M~/Pk7CC } b"4'*<=au } '%Fg+cZN\ t+9[ki //日志 -d-vzri public static void log(String sMsg) ~,YxUn8@ { f%,Vplb System.err.println(sMsg); ,gO}H)v]t } Fh8 8DDJ L
i g7Ac, zv%]j0 ? public static void log(int sMsg) ]S { gm^j8B System.err.println(sMsg); 6DkFI kS } *s JT\J$D[ } gWk?g^KJL 0Y>5& pseN!7+or /* Fal##6B **TestMethod.java EKgY */ r!+..c package NetFox; QT8GP?F C4[) yJ c/6 public class TestMethod { ;{L ~|q J lwSZpS }yzCq+ public TestMethod() QG1+*J76b@ { ///xx/weblogic60b2_win.exe !l(D0 C try{ ?8U#,qq#` SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); s7d4)A% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); NZb}n`: SiteFileFetch fileFetch = new SiteFileFetch(bean); "1P[D'HV4| fileFetch.start(); AONEUSxJ } :
Iq catch(Exception e){e.printStackTrace ();} Tv[h2_+E a Fh9B\n y:HH@aa) } Sj'Iz # d6+$[4w 2RbK##`vC public static void main(String[] args) C^IPddw> { W5*Kq^6Pd new TestMethod(); b)+;=o% } w!%"b03q } 0:iR=S 点击下载更多相关资料
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