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/* E7,\s
**SiteFileFetch.java wKN9HT */ e#
DAa package NetFox; n >^?BU import java.io.*; _<$=n6# import java.net.*; 6)8']f V l%k: :>;#/<3{ public class SiteFileFetch extends Thread { ~tWBCq 6 @9L9c !
^W|;bq SiteInfoBean siteInfoBean = null; //文件信息Bean Us<lWEX;k long[] nStartPos; //开始位置 pfG:PrZ long[] nEndPos; //结束位置 QZY(S*Up FileSplitterFetch[] fileSplitterFetch; //子线程对象 H0S7k`. long nFileLength; //文件长度 E_z@\z MB boolean bFirst = true; //是否第一次取文件 #'[ f^xgJ boolean bStop = false; //停止标志 %2{E'^#)p- File tmpFile; //文件下载的临时信息
J' ;tpr DataOutputStream output; //输出到文件的输出流 Ny#%7%( ;Mc}If* //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) w?[)nlNW public SiteFileFetch(SiteInfoBean bean) throws IOException ]PFc8qv{ {
Hi9]M3Ub siteInfoBean = bean; ]3v //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Sa Nx;xgi tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); a36<S0R if(tmpFile.exists ()) `U1"WcN { ;rFa I^ bFirst = false; 0Ec -/
read_nPos(); `>V.}K^4 } 6*e:ey U else ecb[m2z { *6h.#$\ nStartPos = new long[bean.getNSplitter()]; dZm{?\^_ nEndPos = new long[bean.getNSplitter()]; i|<*EXB" } R'{V&H^Z 3K'3Xp@A (GeJBw,Q i55']7+0 } -*WD.|k r"n)I$ TiOvrp7B public void run() aoBM_# { Nb$ )YMbA //获得文件长度 wxoBq{r; //分割文件 NEN br$,G //实例FileSplitterFetch k~?@~xm,R //启动FileSplitterFetch线程 fF9vV. } //等待子线程返回 )a.U|[:y[+ try{ 1.uyu if(bFirst) H1X6f7` { XW19hG nFileLength = getFileSize(); ^Ab|\5^3 if(nFileLength == -1) ,0~'#x> { hGpaHY>My System.err.println("File Length is not known!"); \dP2xou= } ]6%| L else if(nFileLength == -2) M]&9Kg3 { ]-O:| q>] System.err.println("File is not access!"); #bGt%*Re p } iQA
f else p1Els/| { -O ej6sILO for(int i=0;i<nStartPos.length;i++) $,R|$0B7 { O|8p # nStartPos = (long)(i*(nFileLength/nStartPos.length)); {6n B83BB } Oh|Hy/&6W for(int i=0;i<nEndPos.length-1;i++) P'g$F<~V { ua2SW(C@ nEndPos = nStartPos[i+1]; En[cg } nzU@}/A/ nEndPos[nEndPos.length-1] = nFileLength; /N~.,vf } 2r1.,1 } pN?
.i&]VGv {|
Tl3 //启动子线程 ]A'E61t<n fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; q),yY]5 for(int i=0;i<nStartPos.length;i++) Og^b'Kx/ { >R
:Bkf- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h_H$+!Nzb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), wVp nStartPos,nEndPos,i); j134iVF% Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p*vEVo fileSplitterFetch.start(); F(mm0:lT } ?&"-y)FG // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WOquG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); g&&5F>mF // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", % gmf nEndPos = " + nFileLength); ,|}Pof=]xk // fileSplitterFetch[nPos.length-1].start(); >=$( ,8" H:2#/1Oz> '`^`NI` //等待子线程结束 Bh<)e5lP: //int count = 0; tKu'Q;J //是否结束while循环 e0qU2 boolean breakWhile = false; ~:v" TuuK r,a V11{ UhXZ^k3 while(!bStop) (@[c;+x { ^pIT,|myY7 write_nPos(); J1KV?aR Utility.sleep(500); a}EO7tcg, breakWhile = true; |]*]k`o<) ~{/"fTif N8_
c%6GE for(int i=0;i<nStartPos.length;i++) *\L\Bzm { 09HlL=0q if(!fileSplitterFetch.bDownOver) |Q[[WHqj2f { <XDYnWz breakWhile = false; 1U^;fqvja break; .0}]/%al } {d|e@`"T } W^v3pH-y# if(breakWhile) GAI(= break; =^%#F~o: 86y)+h` Wo+fMn(O //count++; \jH^OXxb //if(count>4) g]%sX6T // siteStop(); Y- esD'MD } .W>LEz' =Kqb
V{! bh
V.uBH System.err.println("文件下载结束!"); 41dB4Td5t } 1g<jr. catch(Exception e){e.printStackTrace ();} Jvac|rN } 7.}Vvg#G ~?E.U,R QmxI;l //获得文件长度 M5\$+Tu public long getFileSize() v{tw ;Z# { :k&R]bc9 int nFileLength = -1; x)GpNkx: try{ tr?U/YG URL url = new URL(siteInfoBean.getSSiteURL()); 0KT^V R HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z8 eB5!$ httpConnection.setRequestProperty("User-Agent","NetFox"); 8U86-'Pq we?#
Dui -?%81 z.Qq int responseCode=httpConnection.getResponseCode(); Z /G`8|A if(responseCode>=400) w&F.LiX^ { I.dS-)Y processErrorCode(responseCode); ; ,9:1.L return -2; //-2 represent access is error h[*:\P` } <b>g^ `}?D ~$PY6s r&rip^40 String sHeader; yX7P5c. Te d1Ky2O XiW~?
*Z for(int i=1;;i++) ^K3Bn { ka=EOiX. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 0Ba*"/U]t~ //Utility.log(in.readLine()); Ie"eqO! sHeader=httpConnection.getHeaderFieldKey(i); +Z7:(o< if(sHeader!=null) 15J t
@{<r { W6^YFN if(sHeader.equals("Content-Length")) a'!p^/6? { _<^mi!Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $Cnv]1% break; (Q(=MEar } ,II-:&H } IeN~E'~ else |\BxKwS^ break; {ovW6# } /0 2-0mNv } Q@(tyW+8U@ catch(IOException e){e.printStackTrace ();} @V =HY catch(Exception e){e.printStackTrace ();} R1?LB"aN q=x1:^rVH Xn6'*u>+;[ Utility.log(nFileLength); B%(-UTQf ;%^T*?t wl5+VC*l0 return nFileLength; 0zc~!r~ } b wqd`C E}lNb
:{=2ih-} //保存下载信息(文件指针位置) /NB;eV? private void write_nPos() $s<bKju { @)x8< try{ 7N8a48$8 output = new DataOutputStream(new FileOutputStream(tmpFile)); FA$1&Fu3Y output.writeInt(nStartPos.length); St|B9V?eEB for(int i=0;i<nStartPos.length;i++) P$i d? { =z4kK_?F, // output.writeLong(nPos); aTFT'(O, output.writeLong(fileSplitterFetch.nStartPos); i p;
RlO output.writeLong(fileSplitterFetch.nEndPos); Dssecc' } D:#e;K output.close(); 4fL/,j/^ } @QbTO'UzK` catch(IOException e){e.printStackTrace ();} Sp\
7 catch(Exception e){e.printStackTrace ();} #xNXCBl]O } :\69N/uw` EZ)$lw/!J ((
{4)5} //读取保存的下载信息(文件指针位置) VQ/Jz5^ private void read_nPos() 8dCa@r&tz { "zx4k8 try{ [`U9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ByivV2qd{ int nCount = input.readInt(); fl*>m, nStartPos = new long[nCount]; A5kz(pj nEndPos = new long[nCount]; A[Pz&\@ for(int i=0;i<nStartPos.length;i++) ^k}%k#) { g3kF&+2i nStartPos = input.readLong(); J`[He$7) nEndPos = input.readLong(); Y~g*"J5j } Wer.VL input.close(); 8jjq)d4# } -Ou@T#h" catch(IOException e){e.printStackTrace ();} c5AEn -Q catch(Exception e){e.printStackTrace ();} qV7nF
}V{ } 0k6S`e9gI yGX"1Fb?;x M'}iIO`L private void processErrorCode(int nErrorCode) gvy c(d { qIg^R@ System.err.println("Error Code : " + nErrorCode); eG\`SKx_ } PNG!q}(c K[M[0D y)D7!s //停止文件下载 !F[^?:pK public void siteStop() jLCZ
JSK { W>T6Wlxu`6 bStop = true; p}9bZKyf for(int i=0;i<nStartPos.length;i++) 6U[bAp fileSplitterFetch.splitterStop(); k/mO(i%qi h+d3 JM az;o7[rI^ } 5$Da\?Fpn } :vRUb>z //负责部分文件的抓取 ;=F]{w]$+ **FileSplitterFetch.java U]W+ers */ `&!J6)OJ package NetFox; 1Aw/-FxJ t Zqy \_G %\QK/`krp import java.io.*; 9Netnzv% import java.net.*; a[A9(Ftn XXA1%Lw% oRQJ YH public class FileSplitterFetch extends Thread { <j^bk"l p j_Qkw ? /4lm=ZE/ String sURL; //File URL 5V"g,]'Nd long nStartPos; //File Snippet Start Position D0HLU
~o long nEndPos; //File Snippet End Position CF_pIfbaf int nThreadID; //Thread's ID G~fM!F0 boolean bDownOver = false; //Downing is over WC
*e#QP boolean bStop = false; //Stop identical & U6 bOH%P FileAccessI fileAccessI = null; //File Access interface +*vg)F: TX7]$Wj ,sln0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ZQ'bB5I { Tye[iJ this.sURL = sURL; @EV*QC2l;Y this.nStartPos = nStart; dyNKok# this.nEndPos = nEnd; FEzjP$ nThreadID = id; afNqK~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 l1MVC@'pvP } /swNhDQ"o i>}aQ:&^0 WjVj@oC public void run() \C eP.,< { =%+O.
while(nStartPos < nEndPos && !bStop) G.[,P~yy. { AQ`
`Dp X
cDu&6Dy ;R
x Rap try{ QFYO_$1Y) URL url = new URL(sURL); MzudCMF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8BgHoQ* httpConnection.setRequestProperty("User-Agent","NetFox"); p !
_\a String sProperty = "bytes="+nStartPos+"-"; MrGq{,6C httpConnection.setRequestProperty("RANGE",sProperty); p3R: 3E6p Utility.log(sProperty); %zCV>D 7\xGMCctM _I1:|y InputStream input = httpConnection.getInputStream(); !CO1I-yL //logResponseHead(httpConnection); !|@hU/ 01^+HEbm ?!Bf# "TY byte[] b = new byte[1024]; #lld*I"d int nRead; ~ WO while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <g4[p^A { {BS}9jZx nStartPos += fileAccessI.write(b,0,nRead); ~aZy52H_#. //if(nThreadID == 1) <RaM@E // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O7of9F~" } lNwqWOWy ;)'@kzi XHER [8l Utility.log("Thread " + nThreadID + " is over!"); 6J""gyK. bDownOver = true; "7X[@xX@ //nPos = fileAccessI.write (b,0,nRead); |DBj<|SX } :Ou[LF.O catch(Exception e){e.printStackTrace ();}
}\$CU
N } ??u*qO:p } dvX[,*wz
'K7m!y WNmG'hlA //打印回应的头信息 P]mJ01@' public void logResponseHead(HttpURLConnection con) mY1Gm| { hq|I%>y for(int i=1;;i++) J\%SAit@ { Ww&r String header=con.getHeaderFieldKey(i); 92 oUQ EK if(header!=null) m*f"Y"B.1I //responseHeaders.put(header,httpConnection.getHeaderField(header)); $c0<I59&| Utility.log(header+" : "+con.getHeaderField(header)); p-o8Ctc?V else RoLN# break; m<liPl
uv } kIwq%c; } w =2; QJ< vBLs88 pt_]&3\e public void splitterStop() zc.r&(d { Xf%vfAf bStop = true; 8c3/n } \`oP\|Z dIq*"Ry+~ eZdFfmYW^R } ym;I(TC+ m88(f2Ch *bl|[(pP /* -2qI2Z **FileAccess.java U9Gg#M4tY *//文件访问(定位,写) 's\rQ-TV package NetFox; @>q4hYF import java.io.*; UXPF"}S2 5h[<!f= kIJ=]wU|v public class FileAccessI implements Serializable{ Fgw$;W nU23D@l //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ,E&W{b RandomAccessFile oSavedFile; l{8t;!2t long nPos; =l4F/?u]f@ X&gXhr#dL\ nkkUby9 public FileAccessI() throws IOException ?8ady%
.ls { +%H2;8{F this("",0); Q94p*]W" } |]'gd)%S\ asL!@YE 0Ci:w|J public FileAccessI(String sName,long nPos) throws IOException q@d6P~[-gj { fiQ/ &]|5 oSavedFile = new RandomAccessFile(sName,"rw"); ge[&og/$ this.nPos = nPos; *n`8 -= oSavedFile.seek(nPos); fO}Y$y\q } 4`p[t;q )AXa.y i|N(=Z= public synchronized int write(byte[] b,int nStart,int nLen) l TJM}K { 6Z!OD(/e int n = -1; P`y 0FKS try{ (P 9$Ei0fv oSavedFile.write(b,nStart,nLen); _))--+cL n = nLen; bkL5srH } @\Yu?_a catch(IOException e) 7Yly^ { lt|UehJF e.printStackTrace (); 2^fSC`! } r~sQdf k2DBm q; p}
i5z_tS return n; 0[!38 } UP@-@syGw bEl)/z*gy/ 2@a]x( } J}s)#va9R k1_3\JO"6 `AxhA.&V /* B#K2?Et!t **SiteInfoBean.java Y?V>%eBu */ &&($LnyA] package NetFox; QVQ?a&HYS ;T?4=15c J2Eb"y>/; public class SiteInfoBean { M\jTeB"Z }~$96|J @G0j/@v private String sSiteURL; //Site's URL }|4dEao\ private String sFilePath; //Saved File's Path VD- 2{em private String sFileName; //Saved File's Name |k=L&vs
private int nSplitter; //Count of Splited Downloading File #ZPy&GIr i*Ee(m]I $_NP4V8|z/ public SiteInfoBean() 9|RR;k[ {//nSplitter的缺省值为5 pTk1iGfB //default value of nSplitter is 5 H| 1O>p& this("","","",5); m\?H
<o0 } h` ,! p 9?#L/ cG~-OHU public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =)9@rV&~ { "8h7"WR sSiteURL= sURL; iLD:}yK sFilePath = sPath; yZ]u{LJS sFileName = sName; ?\NWKp this.nSplitter = nSpiltter; c;pv< lX' 01" b9`jU 6!^&]4 } p!xCNZ(m BR [3i}Ud V,qc[*_3 public String getSSiteURL() k(.6K[b { wc#E:GJcK return sSiteURL; xf]_@T; } I@<\DltPi Juqe%he` &KS*rHgt? public void setSSiteURL(String value) Vy7o}z` { lboi\GP| sSiteURL = value; _wKaFf } <|MF\D' ^yo~C3r~ e=m=IVY#W public String getSFilePath() lEe<!B$d" { X|w[:[P return sFilePath; jA}b=c } IDIok~B=e E 'O[E= -]K9sy)I public void setSFilePath(String value) M#7w54~b?M { q/lQEfR sFilePath = value; 86AZ)UP2D } Z.DO 2=+= 6,q}1- gx',~ public String getSFileName() KtO|14R: { WQ1~9# return sFileName; L
H8iHB } @z-%:J/$ n+XLZf# (Iz$_( public void setSFileName(String value) 4Lb!Au|Y { zY=eeG+4s sFileName = value; 3\B28m } j@HOU~x [PW\l+i ?~p]Ey}~9 public int getNSplitter() <n-}z[09 { ;#Y'SK return nSplitter; .*Mp+Q}^ } :[r/
Y Y*Ra!]62 L]kd.JJvy public void setNSplitter(int nCount) DQ*T2*L { =+z +`ot nSplitter = nCount; };Oyv7D+b } +>}LT_ } rn9n _) !jTtMx u$38"&cmA /* J_S8=`f% **Utility.java @/,:".
SM */ m0Geq. package NetFox; =f/CBYNw@V VchI0KL? ki6Lt public class Utility { j"F?^0aR,Q ?` lD|~ -Lhq.Q*a public Utility() >'1[Bh { BICG@ uo8[,' [o"<DP6w } U
#C@&2 g2;lEW //线程睡眠 "P9(k> public static void sleep(int nSecond) DYDeb i6 { C<Z{G%Qm try{ ?Gl]O3@3 Thread.sleep(nSecond); bEKh U\@=J } %vil~NU catch(Exception e) ?XbM { 7tbY>U8 e.printStackTrace (); hp1+9vEN } l+a1 `O }
=(]Z%Q-V d%za6=M //日志 ;,}Dh/&E public static void log(String sMsg) mCyn:+ { M$48}q+ System.err.println(sMsg); Zz1nXUZ } `/O AgV"` bp!Jjct JC MUK<CG public static void log(int sMsg) 6_s(Kx>j { ^)(-7H System.err.println(sMsg); b'W.l1]<- } Fw S>V2R } 5a-x$Qb9 s&hr$`V4 vc :% /* VsJiE0'% **TestMethod.java z2>LjM)
# */ v\[+ package NetFox; .g3=L aeISb83Y | * bd3^mP public class TestMethod { P)kJ[Zv>f DXo]O}VF q)mG6Su
d public TestMethod() /O5&)%N { ///xx/weblogic60b2_win.exe -p>~z ) try{ !> =ybRe SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); iy8J l //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); W#%s0EN<_ SiteFileFetch fileFetch = new SiteFileFetch(bean); ?!K6")SE fileFetch.start(); nTv}/M& } X@"G1j >/ catch(Exception e){e.printStackTrace ();} xorafL FpiTQC7d x9,jXd } A#6zINK#B 'f!U[Qatg BY.k.]/ public static void main(String[] args) Z4EmRa30 p { Lo~;pvv new TestMethod(); K8aqC{ } G[\TbPh } IH;sVT$M 点击下载更多相关资料
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