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/* HS(<wI **SiteFileFetch.java N..9N$+( */ ya:H{#%6 package NetFox; *
+OAc`8 import java.io.*; .*Hv^_ import java.net.*; tCc}}2bC& < "~k8:=4 1d\K{ 7i# public class SiteFileFetch extends Thread { l_,8_u7G []dRDe;# )s6tjlf8 SiteInfoBean siteInfoBean = null; //文件信息Bean A%Bz52yg long[] nStartPos; //开始位置 !^8'LMY<I long[] nEndPos; //结束位置 /f# rN_4 FileSplitterFetch[] fileSplitterFetch; //子线程对象 !kV?h5@Bo long nFileLength; //文件长度 ][?GJ"O+U boolean bFirst = true; //是否第一次取文件 o,aI<5" boolean bStop = false; //停止标志 .-WCB File tmpFile; //文件下载的临时信息 Uj!L:u2b DataOutputStream output; //输出到文件的输出流 &Q&$J )0 $7BD~U //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >Zr/U!W*? public SiteFileFetch(SiteInfoBean bean) throws IOException QkF-}P% { 8=2)I. siteInfoBean = bean; P AKh v.7 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <?Lj!JGX tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x1Si&0T0P< if(tmpFile.exists ()) .0a$E`V=D { f3596a bFirst = false; Q7DkhKT read_nPos(); Xt7uCs } eA+6-'qN else tGf { 5|>jz ` nStartPos = new long[bean.getNSplitter()]; (TY^
ky Sr nEndPos = new long[bean.getNSplitter()]; Ql\GL" } FijzO ,>~92 Fe/*U4xU ZAiQofQ:2 } 3F4I{L G4=v2_] @|cas|U.r public void run() c3Mql+@ { f|<
*2Mk //获得文件长度 H ~$a6T"& //分割文件 +q=/}| //实例FileSplitterFetch Q p<6qM35 //启动FileSplitterFetch线程 )fC^h=Qp //等待子线程返回 QzV:^!0J try{ )9PQj if(bFirst) |\b*p:el { lJK U^?4S8 nFileLength = getFileSize(); $Itehy if(nFileLength == -1)
zx\?cF { >Vg<J~[g System.err.println("File Length is not known!"); bx5X8D } \Mi y+<8$ else if(nFileLength == -2) ?p}m[9@ { 2>UyA.m0 System.err.println("File is not access!"); BGUP-_& } Z$+0gm\Cnw else
ft$/-; { +='.uc_ for(int i=0;i<nStartPos.length;i++) QRa>W/N { )TP7gLv=b nStartPos = (long)(i*(nFileLength/nStartPos.length)); M#2DI?S@ } tTP"*Bb for(int i=0;i<nEndPos.length-1;i++) *%Q!22?6F { ~xzRx$vU nEndPos = nStartPos[i+1]; QPdhesrd- } zQD$+q5h nEndPos[nEndPos.length-1] = nFileLength; zf6k% } $%sOL(
r } 3VKArv- 7zy6`OP )Ibp%'H //启动子线程 &grT} fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; A<AZs~f for(int i=0;i<nStartPos.length;i++) VBsS1!g { !7Ta Vx}`( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ULAAY$o@5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Uln[UK nStartPos,nEndPos,i); RV7l=G9tq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); rFdovfb
fileSplitterFetch.start(); a B%DIH, } p]IF=~b // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IU/dY`J1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BEN=/
v // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Xb3z<r
nEndPos = " + nFileLength); $^}?98m // fileSplitterFetch[nPos.length-1].start(); RCo!sZP} _KC()OIeC 1Y\g{A" //等待子线程结束 TDk' //int count = 0; t%V!SvT8+ //是否结束while循环 j8L!miv6 boolean breakWhile = false; 4tof[n3us $9j\sZj& zT*EpIa+LS while(!bStop) %sbDH { TE3A(N' write_nPos(); 8|OsVIe% Utility.sleep(500); ;1A4p`) breakWhile = true; w?Cqe
N ^#9
&Rk!t |Xlpgdiu for(int i=0;i<nStartPos.length;i++) ZM`6zS! { xJ:15eDC if(!fileSplitterFetch.bDownOver) &2d^=fih { NVAt-u0LB breakWhile = false; R6r'[-B2 break; # 4L[8(+V } odD^xg"L } #qtAFIm' if(breakWhile) $0~H~- break; K?8{y {m.l{<H NiQ`,Q$B //count++; ~k'KS
7c //if(count>4) & gnE" // siteStop(); `lX |yy" } AK]{^Hvz @`^+XP K\ FctqE/>}I System.err.println("文件下载结束!"); y0k*iS
e } 8*-8"It<" catch(Exception e){e.printStackTrace ();} !o1{. V9q } ,u8)g;8s ze@NqCF X`JWYb4 //获得文件长度 >RZ]t[)y public long getFileSize() ViIt'WX { (n_lu=E70 int nFileLength = -1; [DpGL/Y. try{ qpjtF' URL url = new URL(siteInfoBean.getSSiteURL()); Ab ,n^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >>oR@ httpConnection.setRequestProperty("User-Agent","NetFox"); Y&!M#7/'J3 i`U:uwW` nk|j(D int responseCode=httpConnection.getResponseCode(); 6A&e2K> A
if(responseCode>=400) `?r]OVe{y { $<cio
X processErrorCode(responseCode); HI)MBrj;r return -2; //-2 represent access is error 3C'`K, } |U)m'W-(q ^K*uP^B= B7BXS*_b String sHeader; O_^O1 hiO:VA Jf6uE?. for(int i=1;;i++) swNJ\m { $.{CA-~%[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v0hr ~1 //Utility.log(in.readLine()); ]AkHNgW sHeader=httpConnection.getHeaderFieldKey(i); banie{ e if(sHeader!=null) C/V{&/5w { Dlz||== if(sHeader.equals("Content-Length")) .I\)1kjX { eLE9-K+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); vl59|W6 break; B~zP!^m } E/ %S0 } v\7k else {.F``2 break; ;m6Mm`[i< } EGMj5@> } GB Oz,_pw catch(IOException e){e.printStackTrace ();} ;4.D% catch(Exception e){e.printStackTrace ();} dv3+x\`9 L-ans2? /?X1>A:* Utility.log(nFileLength); Cr0
\7 K^z-G=|N yH_L<n return nFileLength; +SCUS] }
/;LteBoY _YF~DU OdX-.FFl //保存下载信息(文件指针位置) G"!YV#"~ private void write_nPos() *]G&pmMs { AMqu}G try{ R<W#.mpo6 output = new DataOutputStream(new FileOutputStream(tmpFile)); w`XwW#!}@$ output.writeInt(nStartPos.length); 7kpCBLM(} for(int i=0;i<nStartPos.length;i++) xo{f"8}^ { b:fy // output.writeLong(nPos); E\!:MCL output.writeLong(fileSplitterFetch.nStartPos); G3QB Rh{ output.writeLong(fileSplitterFetch.nEndPos); u:H@]z(x } L^PZ\OC output.close(); X'N4a } t!^FWr& catch(IOException e){e.printStackTrace ();} $hB;r catch(Exception e){e.printStackTrace ();} j}YZl@dYV } 5r/QPJ<h 2 cfzLW( SxXh
N //读取保存的下载信息(文件指针位置) h`&@>uEiq private void read_nPos() g#FqjE|mx { 6$wS7Cu try{ vj0`[X DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ><iE VrpN int nCount = input.readInt(); (\FjbY9& nStartPos = new long[nCount]; e1{t qNJ nEndPos = new long[nCount]; [ d<|Cde for(int i=0;i<nStartPos.length;i++) Vja' :i { THQW8 V nStartPos = input.readLong(); +Cx~4zEq nEndPos = input.readLong(); "d'xT/l
" } l1`Zp9I input.close(); OB3AZH$ } *sf9(%j catch(IOException e){e.printStackTrace ();} U0u @[9! catch(Exception e){e.printStackTrace ();} W"Dj+/uS } Q"8)'dL' bf3LNV| Bt,qG1>$- private void processErrorCode(int nErrorCode) [K13Jy+ { !_<. 6ja System.err.println("Error Code : " + nErrorCode); do*`-SDy } 'N=' B<^;% 8s8q`_.)( FVG|5'V^ //停止文件下载 ]Ke|wRQD public void siteStop() Cd#*Wp)s { SiojOH bStop = true; u!g=>zEu for(int i=0;i<nStartPos.length;i++) &m8B%9w fileSplitterFetch.splitterStop(); %H<w.]> psRm*,*O <Q\`2{ } UkNC|#l) } $$ _ uQf //负责部分文件的抓取 iBJ*6orz **FileSplitterFetch.java DJ}xD&G */ %9mB4Fc6b) package NetFox; ygpC1nN NL&g/4A[a ?RWd"JTGue import java.io.*; 1:YDN.* import java.net.*; l0D.7>aj F]yclXf(' ieBW 0eMi public class FileSplitterFetch extends Thread { [%l+
C~m ]CC~Eo-%- G&C)`}; String sURL; //File URL .e.vh:Sz long nStartPos; //File Snippet Start Position QH\*l~;B\ long nEndPos; //File Snippet End Position " "a+Nc int nThreadID; //Thread's ID qwFn(pK[ boolean bDownOver = false; //Downing is over A9l^S|r boolean bStop = false; //Stop identical Arp4$h FileAccessI fileAccessI = null; //File Access interface 3%EwA\V( 3;:xEPb._6 {7/6~\'/@ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException UO:>^,(j { GUN<ZOYb= this.sURL = sURL; +#B%Y K|LR this.nStartPos = nStart; (/*-M]> this.nEndPos = nEnd; e:7aVOm nThreadID = id; |um)vlN;9 fileAccessI = new FileAccessI(sName,nStartPos);//定位 qA30z%#z_ } r1?LKoJOn n.1a1 Tf wkm
SIN: public void run() HKxrBQr78 { T3?kabbF while(nStartPos < nEndPos && !bStop) ~{NDtB) { D1g1"^~g `HJw wKd W}=2?vHV= try{ wy-!1wd URL url = new URL(sURL); uPo>?hpq+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,~4(td+R7 httpConnection.setRequestProperty("User-Agent","NetFox"); 0?`#ko7~d String sProperty = "bytes="+nStartPos+"-"; 15s?QSKj httpConnection.setRequestProperty("RANGE",sProperty); Bf*
F^ Utility.log(sProperty); 3=K-+dhk|t }oU&J81 LnyA 5T InputStream input = httpConnection.getInputStream(); H{ $ yy)@F //logResponseHead(httpConnection); }}xR?+4A 8'quQCx*= < 1r.p<s byte[] b = new byte[1024]; T(}da**X int nRead; y\)w# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;kF p)*i { ;s!H nStartPos += fileAccessI.write(b,0,nRead); bQ4 }no0 //if(nThreadID == 1) ]f c:CR // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :Oj+Tc9A } h}d7M55#| JjCf<ktE. x~z 2l#ow Utility.log("Thread " + nThreadID + " is over!"); }B.C#Y$@ bDownOver = true; ?=G H{
%E //nPos = fileAccessI.write (b,0,nRead); Y\=:j7' } Z`!pU"O9l catch(Exception e){e.printStackTrace ();} 9c 6V&b } `fRy"44nR } 6]3ZUH; h^c'L=dR +Oscy-; //打印回应的头信息 j
AE0$u~. public void logResponseHead(HttpURLConnection con) 93dotuF { r]S9z for(int i=1;;i++) &Y>u2OZ { vqHJc2yYkZ String header=con.getHeaderFieldKey(i); vOS0E^ if(header!=null) >tzXbmFp; //responseHeaders.put(header,httpConnection.getHeaderField(header)); nXS%>1o, Utility.log(header+" : "+con.getHeaderField(header)); P:TpB6.=q else KWUz]>Z break; Ed-gYL^< } a8 1%M } #Q"vwek (
A) wcB 1sJN^BvuG public void splitterStop() Uu+C<j&- { v\eBL&WK bStop = true; B@=<'/S\7 } :I('xVNPz _ XZ=4s #77UKYj2L- } *PEuaRDN ,LZ:y1z'V- uH[0kh /* `[CJtd2\ **FileAccess.java 81cmG`G7 *//文件访问(定位,写) j%;)CV
G" package NetFox; xW =$j| import java.io.*; @45 H8|:k !&lPdEc@T cloI 6%5r public class FileAccessI implements Serializable{ #pSOZX 836m5/kH[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 fJ2{w[ne RandomAccessFile oSavedFile; SZ{cno1` long nPos; |sa7Y_ 9 Zm<1Fw U_'q- *W public FileAccessI() throws IOException zDyeAxh4 { _kN%6~+U this("",0); :, [!8QP } PAV2w_X~ zI! R-Nb >-lL-%N_ public FileAccessI(String sName,long nPos) throws IOException "NH+qQhs { yQ{_\t1Wd oSavedFile = new RandomAccessFile(sName,"rw"); 0t?<6-3`/ this.nPos = nPos; ~@ b}=+n oSavedFile.seek(nPos); T zYgH } y=xe<#L )]>
'7] i Q 02??W public synchronized int write(byte[] b,int nStart,int nLen) &W+G{W{3 { xKST-:c + int n = -1; zl
0^EltiU try{ KH>sCEt oSavedFile.write(b,nStart,nLen); !9 LAXM n = nLen; F>kn:I"X) } ?>jArzI catch(IOException e) /{MH' { 2G5!u) e.printStackTrace (); 1=5'R/k } j_uY8c>3\q GnrW{o a 8hv .43 return n; _AHB|P I } T>Rf?%o A;j$rGx i-s?"Fk } \BcJDdL h9w^7MbO VE"0VB. /* IcA\3j **SiteInfoBean.java 9
roth */ p F*~)e package NetFox; LOUKURe E 2td|8vDA >`?+FDOJ, public class SiteInfoBean { h:Mn$VR, e9hVX[uq }Oh'YX#[ private String sSiteURL; //Site's URL ^AjYe<RU} private String sFilePath; //Saved File's Path
9q)nNX<$) private String sFileName; //Saved File's Name tTh;.88Z{ private int nSplitter; //Count of Splited Downloading File @uM3iO7& t k/K0u I1 R\Ts@ public SiteInfoBean() yZ~eLWz {//nSplitter的缺省值为5 vb. Y8[ //default value of nSplitter is 5 s?;<F this("","","",5); &~JfDe9IS } ]^6y NtLK Up/u|A$0V :*&9TNUE@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) voej ~z+ { 6[3Ioh sSiteURL= sURL; CMxjX sFilePath = sPath; T.w}6?2 sFileName = sName; kq}eUY] this.nSplitter = nSpiltter; ,ORG"]_F EO9kE.g cH* /zNp } WVT5VJ7* B-ri}PA At[n<8_| public String getSSiteURL() C`th^dqBV { ! N"L`RWD return sSiteURL; 2c>H(t h= } ;LF)u2x= gcW{]0%L^ C>`.J_N public void setSSiteURL(String value) N9JgV,` { ),y!<\oQ sSiteURL = value; XC/]u%n8]( } T?]kF- H6PXx
uRB)g public String getSFilePath() S`2mtg { \{MrQ2jd return sFilePath; gM;) } L%o6 5 @^:7UI_ 9OQ0Yc!3 public void setSFilePath(String value) EYJ i6# { T)Zt'M sFilePath = value; 7S dV%" } %];h|[ax] g@k#J"Q'[ GEe 0@q#YA public String getSFileName() Q0L@.`~ { }4\!7]FVYX return sFileName; L&DF,fWsF& } 68J 9T^84 MKVfy:g%So }o!#_N0T public void setSFileName(String value) !HdvCYB> { 4(Cd sFileName = value; MR?*GI's } cz7CrK~5 _[$T29:8\] j*eUF-J1 public int getNSplitter() XoKO2<3 { 5M<'A= return nSplitter; /slm
]' } L=
:d!UF `FzYvd"N FUyB"-< public void setNSplitter(int nCount) "W &:j:o { m?D
<{BQ; nSplitter = nCount; Sc4obcw% } q3AJwELXw } [5?4c'Ev `j&0VIU>> )h>\05|T /* (kWSK:l **Utility.java |+Hp+9J */ sJ))<,e5I package NetFox; vU_d=T%$ T3USNc51 _pz,okO[V public class Utility { aN^]bs?R e/"yGQu <*s"e)XeqF public Utility() ||-nmOy { v229H< EJf #f ]{f^;y8 } di6B!YQP CS/Mpmsp //线程睡眠 ;y>S7n>n: public static void sleep(int nSecond) H~A"C'P3# { Tub1Sv>J try{ yfmp$GO: Thread.sleep(nSecond); s kN9O"^A } D(y+1^> catch(Exception e) Q~Ay8L+ { j$3rJA%rN e.printStackTrace (); ~I{EE[F>qL } c |>=S)| } BjJ,"sT ,N53Iic //日志 `W@T'T" public static void log(String sMsg) F%xK"l`& { "(s6aqO$ System.err.println(sMsg); ')B =|T) } J,f/fPaf7 10p8|9rE}B 6X/wdk public static void log(int sMsg) "jMqt9ysN { 7ftR4 System.err.println(sMsg); ~12_D'8D[ } MkwU<ae AB } n.*3,4.] 9A~>`.y ]eE 1n2 /* 4SgF,ac3r **TestMethod.java JIzY,%`\ */ eP "`,< package NetFox; 5iVQc -m& 3UdU"d[75 )zU: public class TestMethod { z
v>Oh# e@E17l- ?WQNIX4 public TestMethod() 5F2_xH$5 { ///xx/weblogic60b2_win.exe av-#)E try{ F/>*Ifs SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]4`t\YaT //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); gH[,Xx?BN! SiteFileFetch fileFetch = new SiteFileFetch(bean); kY"KD22a fileFetch.start(); s=Df ` } OOnX` catch(Exception e){e.printStackTrace ();} H3, ut t2-
^-g6 xACdZB( } ciudRK63M %%%S"$t ?7
\\e ;j} public static void main(String[] args) jfD1 { ]IZ>2!6r new TestMethod(); /`[!_4i } v!9i"@<! } >O#grDXb 点击下载更多相关资料
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