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/* #+ai G52+ **SiteFileFetch.java 7=`_UqCV */ >HRL@~~Z package NetFox; 0
zn }l6OS import java.io.*; qe_qag9 import java.net.*; {oVoN>gp Qj3l>O 8{B]_:
-: public class SiteFileFetch extends Thread { U
UYx-x f?BApm [AN= G!r SiteInfoBean siteInfoBean = null; //文件信息Bean ., =\/ C< long[] nStartPos; //开始位置 c2~oPUj long[] nEndPos; //结束位置 [kKg?I$D@B FileSplitterFetch[] fileSplitterFetch; //子线程对象 H[[#h=r0f long nFileLength; //文件长度 I7]qTS[vg boolean bFirst = true; //是否第一次取文件 L7"B`oa(p boolean bStop = false; //停止标志 ^@f-Ni\ File tmpFile; //文件下载的临时信息 :=oIvSnh DataOutputStream output; //输出到文件的输出流 XY)I ~6$Y IfzW%UL //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Sau?Y public SiteFileFetch(SiteInfoBean bean) throws IOException [J\! 2\Oo { Wagb|B\ siteInfoBean = bean; XtftG7r9S //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); bFB.hkTP tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); g$T%
C? if(tmpFile.exists ()) HLb`'TC3r+ { zW:r7
P. bFirst = false; \H{UJ read_nPos(); $Ma*q EB } z;lWr(-x else A|<i7QVY { /#Lm)-%G nStartPos = new long[bean.getNSplitter()]; Sej(jJX1 nEndPos = new long[bean.getNSplitter()]; ^X|Bzz) } &'"dYZj{ ZRn!z`.0 PL*1-t?# 9iM[3uyO } jpt-5@5O u!TMt8+c ;.I,R NM public void run() lnWscb3t { 8c<OX! //获得文件长度 a"!r]=r //分割文件 +L-(Lz[p //实例FileSplitterFetch gxCl=\ //启动FileSplitterFetch线程 W.7XShwd*2 //等待子线程返回 il~A(`+YO try{ WKB
K)= if(bFirst) 2@>#?c7 { get$r5 nFileLength = getFileSize(); )~C+nb '6/ if(nFileLength == -1) 4O'%$6KR( { ,jJbQIu# System.err.println("File Length is not known!"); 19*D*dkBR } @XN*H- | else if(nFileLength == -2) (dHil#l { # 5b
System.err.println("File is not access!"); 6g 5Lf) yG } V!zU4!@qP else m/p:W/0L { eD)@:K for(int i=0;i<nStartPos.length;i++) :$^cY>o { c3!YA"5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); &w{:
qBa } =q<t,U P8 for(int i=0;i<nEndPos.length-1;i++) ^
Q { ^-g-]?q nEndPos = nStartPos[i+1]; LDYk\[81 } j%Wip j;c nEndPos[nEndPos.length-1] = nFileLength; I9hZ&ed16 } dw3H9(-lp } `s~[q u$
a7 ';KZ.D //启动子线程 P$Fq62;}r4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; DlxL: for(int i=0;i<nStartPos.length;i++) <>R\lPI2 { 66l+cb fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &b=OT%D~FU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NflRNu:- nStartPos,nEndPos,i); 9PWqoz2c Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2SJ|$VsLaE fileSplitterFetch.start(); `FRdo } arb'.:[z^ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L%31>)8 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6rh^?B // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", H57wzG{xG nEndPos = " + nFileLength); VY j
pl // fileSplitterFetch[nPos.length-1].start(); Ct9dV7SH 18AlQ+')?w ?h3t"9 //等待子线程结束 9e0t //int count = 0; 9N;y^
Y\ //是否结束while循环 0<u(!iL boolean breakWhile = false; 4rH:`494 F+285JK m?`?T
while(!bStop) =m/BH^|&W { [f#7~ write_nPos(); w~Jy,[@n Utility.sleep(500); k@9CDwh*s breakWhile = true; ?^!:
Lw WNo< 0|X p(pL" for(int i=0;i<nStartPos.length;i++) ^9
Pae) { OHK]=DH:M if(!fileSplitterFetch.bDownOver) R y"N_Fb { 905Lk>rB breakWhile = false; 7Lx=VX#]q break; lzK,VZ=mM } #KwK``XC4 } e8VtKVcY if(breakWhile) gbjql+Mx+ break; |s, Add:S j[Oh>yG /<)kI(gf //count++; aJSBG|IC //if(count>4) 9
M!U@> // siteStop(); K%3{a=1 } 'I5~<"E baz~luM v|GDPq System.err.println("文件下载结束!"); 2_CJV } y9X1X{ catch(Exception e){e.printStackTrace ();} ?vV&tqnx% } ^8{:RiN6e~ |\J! x|xy xv~EwT) //获得文件长度 z1m$8-4 public long getFileSize() -"/l)1ox, { #Y<(7 int nFileLength = -1; TRku(w1f try{ N\W4LO6 URL url = new URL(siteInfoBean.getSSiteURL()); DH'0# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <a)L5<# httpConnection.setRequestProperty("User-Agent","NetFox"); q*d@5 zi= gOm $-"V
2 int responseCode=httpConnection.getResponseCode(); 'h{| ] if(responseCode>=400) :{M1]0NH { "Is0:au+?} processErrorCode(responseCode); 2PG= T/ return -2; //-2 represent access is error ]_y0wLq } xOBzT& TY]-L1$ xL}~R7 String sHeader; A&7~]BR\ #ByrX\ sX|bp)Nw for(int i=1;;i++) 8mv}-; { qN(,8P\90 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]n^TN
r7 //Utility.log(in.readLine()); (cdtUE8 sHeader=httpConnection.getHeaderFieldKey(i); taqmtXU=( if(sHeader!=null) Jpr`E&%I6 { /6nj
4.xxc if(sHeader.equals("Content-Length")) t{o&$s93 { Ob
m%\h nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Y(Q!OeC break;
Vc?=cQ'c } al{}p } B|.8+Q else =` KV),\ break; G_)(? } iw0|A } ~#nbD-*# catch(IOException e){e.printStackTrace ();} ]97`=,OUg catch(Exception e){e.printStackTrace ();} 'X/(M<c 7MhN>a;A\ XS`=8FQ Utility.log(nFileLength); $p~X"f?0 uH=^ILN. ;SVAar4r return nFileLength; MH h;>tw } rLJjK$_x 'o% .Qx b,o@m //保存下载信息(文件指针位置) JmJNq$2#c private void write_nPos() xI,7ld~ { ^K`Vqo try{ KdU&q+C^ output = new DataOutputStream(new FileOutputStream(tmpFile)); @zAav> output.writeInt(nStartPos.length); dXewS_7 for(int i=0;i<nStartPos.length;i++) .|x"'3# { xe9V'wICp( // output.writeLong(nPos); x'hUw* output.writeLong(fileSplitterFetch.nStartPos); PBY^m+
output.writeLong(fileSplitterFetch.nEndPos); mYw9lM } .jvRUD8A7 output.close(); m5\/7 VC } :+$/B N:iO catch(IOException e){e.printStackTrace ();} :9f/d;Mo3 catch(Exception e){e.printStackTrace ();} ?*: mR|= } D<UX^hU
-A)XYz
" UxKG+ //读取保存的下载信息(文件指针位置) I%gDqfdL private void read_nPos() BY!M(X
jrZ { M?m)<vMr* try{ X9/]<Y<! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); c/ s$*" int nCount = input.readInt(); ^y p`<= nStartPos = new long[nCount]; ,BuEX#ZaBl nEndPos = new long[nCount]; $5S/~8g( for(int i=0;i<nStartPos.length;i++) oH]"F { yjB.-o(' nStartPos = input.readLong(); DqbU$jt` nEndPos = input.readLong(); f<}>*xH/k } CZ.XEMN\ input.close(); YpwMfl4 } m*
JbZT catch(IOException e){e.printStackTrace ();} _tO:,%dL catch(Exception e){e.printStackTrace ();} (Aw!K`0Y1 } Q~S3d {Bm7'%i &&er7_Q private void processErrorCode(int nErrorCode) 6O#
xV:Uc< { iqh"sx{5bp System.err.println("Error Code : " + nErrorCode); z*BGaSX % } pG0Ca]( AW<z7BD t)h{ w"v //停止文件下载 )EptyH public void siteStop() cO^}A(Ma( { 2pn8PQfg) bStop = true; vivU4:uH3 for(int i=0;i<nStartPos.length;i++) ;"j>k>tg fileSplitterFetch.splitterStop(); _7qGo7bpN DP<[Uz& A57e]2_ } Z%1{B*(e } >p,FAz> //负责部分文件的抓取 W\l"_^d*
**FileSplitterFetch.java _|qs-USA */ WEVV2BJ package NetFox; /C"?Y' 5U5)$K'OA ,a1
1&"xl import java.io.*; -&3mOn& (1 import java.net.*; =abBD zy!mP *^_ywqp public class FileSplitterFetch extends Thread { P@pJ^5Jf ,[t>N>10TH !w #x@6yq String sURL; //File URL Rd^X. long nStartPos; //File Snippet Start Position -|aNHZr long nEndPos; //File Snippet End Position sUEvL(%nY int nThreadID; //Thread's ID 6y
d/3k boolean bDownOver = false; //Downing is over 0b~{l; boolean bStop = false; //Stop identical 0 CFON2I FileAccessI fileAccessI = null; //File Access interface syR
+; Lkl+f~m q]r?s%x public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException byB
ESyV!O { ZuIw4u(9 this.sURL = sURL; R;2q=% this.nStartPos = nStart; /ig'p53jL this.nEndPos = nEnd; 1j":j %9M nThreadID = id; +kN/-UsB fileAccessI = new FileAccessI(sName,nStartPos);//定位 QYj 8c]8f } w +~,Mv \ x8q3 Njr |r%lJmBB public void run() xHo
iu$i6 { C.rLog# while(nStartPos < nEndPos && !bStop) Vv J]*D+e { u^NZsuak dOfEEqPI &Y/Myh[P try{ Fo86WP} URL url = new URL(sURL); nL]-]n; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <~}#Q,9 httpConnection.setRequestProperty("User-Agent","NetFox"); nm.~~h+8M String sProperty = "bytes="+nStartPos+"-"; h..D1(M httpConnection.setRequestProperty("RANGE",sProperty); @%}4R`S0 Utility.log(sProperty); 1deNrmp% 4EtP| K)!Nf.r$9 InputStream input = httpConnection.getInputStream(); %e,X7W`'2 //logResponseHead(httpConnection); VM [U&g<8n Dd:;8Xo SC6cFyp2 byte[] b = new byte[1024]; FsdxLMwk1 int nRead; *'&mcEpg while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Rz_fNlA { JDA :)[; nStartPos += fileAccessI.write(b,0,nRead); JE$aYs<(TF //if(nThreadID == 1) 8p)*;Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \vR&-+8dk } +o94w^'^$b !f^'- AO"pm Utility.log("Thread " + nThreadID + " is over!"); gPrIu+|F bDownOver = true; gBZ1We u-' //nPos = fileAccessI.write (b,0,nRead); |&hu3-( } },@1i<Bb catch(Exception e){e.printStackTrace ();} 5C^oqUZ } d
l<7jM? } 6IyD7PQ [EX@I
=? /v^1/i //打印回应的头信息 Aa#WhF public void logResponseHead(HttpURLConnection con) ;Fi(zl { !gm;g}]szG for(int i=1;;i++) >PD*)Uq& { yS)73s/MrY String header=con.getHeaderFieldKey(i); V7\@g if(header!=null) qbwX*E~; //responseHeaders.put(header,httpConnection.getHeaderField(header)); 1aQR9zg% Utility.log(header+" : "+con.getHeaderField(header)); ![OKmy else 7Y>17=| break; GVaIZh< } S3oSc<&2 } vg6'^5S7 jZX2)# a! hCcAAF*I;5 public void splitterStop() #ARQB2V { |*w}bT(PfR bStop = true; `?H yDny } :"pA0oB ,iQRf@#W_b uN)o|7 } e{<r<]/j +v7mw<6s fA k]]PU /* #_b
U/rk)* **FileAccess.java ?^<
E#2a *//文件访问(定位,写) c[I4'x package NetFox; FYs-vW { import java.io.*; !((J-:= +mgmC_Q(0 BcfW94 public class FileAccessI implements Serializable{ wM"PJG /4}B}"`Sl= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 mT7B#^H RandomAccessFile oSavedFile; kX2bU$1Q,i long nPos; i#lnSJ08 dV( "g], ky^p\dMh public FileAccessI() throws IOException =@%Ukrd@ { #Oeb3U this("",0); k[`9RGT } a->;K+ @We im7r 4w\@D>@}H public FileAccessI(String sName,long nPos) throws IOException /ehmy(zL { ^J
TrytIB oSavedFile = new RandomAccessFile(sName,"rw"); [K\Vc9 this.nPos = nPos; B3j oSavedFile.seek(nPos); j<HBzqP%6 } oVK3=m@{ S{q c1qj 1j9R^ public synchronized int write(byte[] b,int nStart,int nLen) -
DO { Ob+Rnfx37 int n = -1; M$9?{8m try{ m~#f L oSavedFile.write(b,nStart,nLen); ( 2oP=9m n = nLen; -Dx_:k|k } \x,q(npHi catch(IOException e) {c;][>l { r?w^#V e.printStackTrace (); N'8u}WO } Y M<8>d vH^6O:V 'K L"i return n; n I63Ns } (&W&1KT C [Ap&S ]r^/:M } g p2S 2+2Gl7" s bI_6';hq! /* 3u)NkS= **SiteInfoBean.java X#|B*t34 */ 7<T1#~w4L package NetFox; Q=,6W:j $y0[AB|V k"kGQk4 public class SiteInfoBean { %|tDb _{]\} =@ i; qb\ private String sSiteURL; //Site's URL .d JX,^ private String sFilePath; //Saved File's Path GV+K]
KDI private String sFileName; //Saved File's Name -|"[S"e private int nSplitter; //Count of Splited Downloading File TQ/EH~Sz JZa^GW:YQh rkF>c public SiteInfoBean() y*BS
%xTF {//nSplitter的缺省值为5 z^ai * //default value of nSplitter is 5 b6mSPH@ this("","","",5); >o]!-46 } R 2{ kS 95wi~^^ ji|+E`Nii public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) _6tir'z { o4%H/|Oq. sSiteURL= sURL; Ap:mc: sFilePath = sPath; wb#ZRmx} sFileName = sName; e2~$=f- this.nSplitter = nSpiltter; bvxol\7 ; @d+NeS ,EE,W0/zzM } YR 5C`o P1r)n{; vky@L! &, public String getSSiteURL() D<16m<b { ,esryFRG return sSiteURL; 7CK3t/3D } B$Z%_j& z154lY}K u{6b>c|,X public void setSSiteURL(String value) t-;zgW5mwF { iFJ1}0<(x sSiteURL = value; R/_bk7o]H } zF)&o} 69 >- /S9(rI<' public String getSFilePath() `/"rs@ { 17
k9h?s* return sFilePath; ccdP}|9e } pZ@)9c |g$n-t /.1yxb#Z?, public void setSFilePath(String value) ]g3RVA%\l { )wt mc4' sFilePath = value; R7nT,7k. } 1?oX" Az`c ?
W% K1gZ>FEY|N public String getSFileName() M2$.Yom[ { __3s3YG return sFileName; NrVE[Z# } )'+
tb\g G2 E4 9 W7 ljUg public void setSFileName(String value) Wq+a5[3" { wm'a)B? sFileName = value; m\0Xh* } tbH`VD"u zc`gm~@ -J06H&/k public int getNSplitter() X0}+X'3 { 6dNW2_ return nSplitter; 6H #4iMeh } C'wRF90 Sb/`a~q^ xa=Lu?t%< public void setNSplitter(int nCount) +=V[7^K; { vGX}zzto nSplitter = nCount; $$5E+UDOs } Ik\n/EE } +D@+j S.I3m- n&n WY+GEo /* j6JK4{ **Utility.java '#oNOU */ Rs +), package NetFox; F%]ZyO9 <TDp8t9bU -5 Q
gJ public class Utility { B&M-em= [Zpx
:r} l9P=1TL public Utility() 4#D<#!]^ { ,(@J Ntx M SnRx*- g0Ff$-#7 } :kU-ol$ #H5i$ o //线程睡眠 Fmd^9K public static void sleep(int nSecond) !1b4q/ { 5fT"`FL? try{ auai@)v6 Thread.sleep(nSecond); ;usR=i36b } `q$a
p$? catch(Exception e) YaT6vSz { %*A|hK+G:W e.printStackTrace (); JG:li} N } 0^-1/Ec } okkMx" HPus/#j'+ //日志 ] oMtqkiR public static void log(String sMsg) XH`W( { zgnZ72% System.err.println(sMsg); z|k0${iu# } Wp
|qv J6C/`)+w LFskNF0X public static void log(int sMsg) $SbgdbX { nkxv,_)ZT System.err.println(sMsg); "8#EA<lsS } JnY.]: } KB$SB25m 6]^~yby P
QB"Tlw( /* n90DS/Yx **TestMethod.java xe&w.aBI> */ t9\}!{<s package NetFox; tYk!Y/O} 2N}U B=J t8?$q})RL public class TestMethod { JGRL&MG4 unB`n'L 579<[[6~d2 public TestMethod() '~\\:37+ { ///xx/weblogic60b2_win.exe &*YFK/ ] try{ 2e<u/M21> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,vh$G 7D //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N87)rhXSo, SiteFileFetch fileFetch = new SiteFileFetch(bean); Q{:=z6& fileFetch.start(); U(rY,4' } U ID0|+%Y catch(Exception e){e.printStackTrace ();} lvd`_+P$ Rh :|ij>B "2=v:\~= } #7r13$>! ]5',`~jkF 8fSY@ public static void main(String[] args) X? l5} { /_D_W,#P new TestMethod(); 3Ow bU } t8ZzBD!dP } f6])M) 点击下载更多相关资料
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