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/* " twq#Alx **SiteFileFetch.java > ?<C+ZHh */ WJF#+)P:Y package NetFox; * vW#XDx import java.io.*; yp\sJc` import java.net.*; Y/Q/4+ g!.k> |}2X|4&X public class SiteFileFetch extends Thread { HZEDr}RN 1@ .Eh8y I+g[
p SiteInfoBean siteInfoBean = null; //文件信息Bean Nlk' long[] nStartPos; //开始位置 < (<IRCR long[] nEndPos; //结束位置 0MX``/Z72 FileSplitterFetch[] fileSplitterFetch; //子线程对象 XfYhLE long nFileLength; //文件长度 ?JI:>3e boolean bFirst = true; //是否第一次取文件 fFNwmH-jv boolean bStop = false; //停止标志 TF- k|##G File tmpFile; //文件下载的临时信息 ^Uq"hT(41 DataOutputStream output; //输出到文件的输出流 3PgiV%] zD%@3NA41 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2m0laJ3p9 public SiteFileFetch(SiteInfoBean bean) throws IOException
I'>r { g1B[RSWv siteInfoBean = bean; '/v@q]! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @WfX{485 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5fDnr&DR if(tmpFile.exists ()) Jrm 9,7/ { X0e#w? bFirst = false; kZJ.G read_nPos(); )ND%MYJSq } g}Esj"7 else P8=!/L2? { l4smAT nStartPos = new long[bean.getNSplitter()]; ExJexjOWI^ nEndPos = new long[bean.getNSplitter()]; x9s1AzM{ } YMfjTt@Q \g<=n&S? W*/0[|n* J8:f9a:|M } xI b^x=|h zf}X%tp W&Pp5KR public void run() ,sln0 { o:8*WCiqrN //获得文件长度 ZQ'bB5I //分割文件 .uwD;j
+# //实例FileSplitterFetch !i77v,
(#| //启动FileSplitterFetch线程 Q{"QpVY8 //等待子线程返回 sm>5n_Vw try{ C=uYX" if(bFirst) FEzjP$ { I|oS`iLl$ nFileLength = getFileSize(); w\QMA3 if(nFileLength == -1) y1@*)|
r { oGXndfd" System.err.println("File Length is not known!"); oP 4z> } M9s cZuj else if(nFileLength == -2) ERQc1G]3Dd { j!;y!g System.err.println("File is not access!"); :^[HDI-[2 } Kfl#78$d else Z<^TO1xs9B { 67{>x[ for(int i=0;i<nStartPos.length;i++) eg$y,Tx { `7mRUDz nStartPos = (long)(i*(nFileLength/nStartPos.length)); k}h\RCy%f } k;W`6:Kjp for(int i=0;i<nEndPos.length-1;i++) a }m> { n%Df6zQ<@s nEndPos = nStartPos[i+1]; l6O8:XI } Vim*4^[#L nEndPos[nEndPos.length-1] = nFileLength; @#CZ7~Hn } y_e$W3bON, } "-HmXw1+t (;.wsz&K cN(Toj'` //启动子线程 W$bQS!7y fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; H$o=kQN for(int i=0;i<nStartPos.length;i++) {Z^ G]@ { [;n/|/m, fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), r(Vz( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &3t[p= nStartPos,nEndPos,i); 3j2#'Jf|: Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7Fd`MTo fileSplitterFetch.start(); p,'Z{7HG } r3_O?b // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yoc;`hO- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Z2cumx( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -4IHs=`;I nEndPos = " + nFileLength); /suW{8A(E // fileSplitterFetch[nPos.length-1].start(); eKw!%97> #lld*I"d b)1v:X4Bv= //等待子线程结束 F\G-. 1 //int count = 0; HZDeQx`*s //是否结束while循环 +thkx$o boolean breakWhile = false; f+K vym. jqeR{yo&0b !i{9wI while(!bStop) KqI<#hUl { W3.(s~)o write_nPos(); `z)q/;}fC Utility.sleep(500); ZD(VH6<g% breakWhile = true; C ks;f6G tW)KpX yur5"$n for(int i=0;i<nStartPos.length;i++) a6<UMJ { &uMx*TTY if(!fileSplitterFetch.bDownOver) d)yu`U { iXsX@ S^F breakWhile = false; 6";ew:Ih^ break; !Yi2g-( } ?Xq"Q^o4#e } 9>I&Z8J$M if(breakWhile) (O@fgBM break; uZ/XI {/ g;n6hXq4 kQt#^pO) //count++; ><Awk~KR //if(count>4) 3<%ci&B // siteStop(); ^_rBEyz@ } Nm.G,6<J R|u2ga~ c`E0sgp System.err.println("文件下载结束!"); YQ7\99tj } P]mJ01@' catch(Exception e){e.printStackTrace ();} TEN~3 Ef# } }gR!]Cs)^ 618k- #q
mv(VB4 //获得文件长度 rY,zZR+@ public long getFileSize() |mp~d<& { Ww&r int nFileLength = -1; !+(c/ gwBh try{ gx ]5)O URL url = new URL(siteInfoBean.getSSiteURL()); y`Nprwb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2P(6R.8;6 httpConnection.setRequestProperty("User-Agent","NetFox"); C4H$w:bVk D<wz%* p-o8Ctc?V int responseCode=httpConnection.getResponseCode(); \Aq$h:< if(responseCode>=400) Zb4+zps^- { m<liPl
uv processErrorCode(responseCode); L4t(Y7 return -2; //-2 represent access is error ?;xL]~Q~1 } epm ~ WZ6'"Cz` kuI$VC String sHeader; JUpb*B_z pt_]&3\e 3o^~6A for(int i=1;;i++) ~LF1$Cai { rf=oH
} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N eC]MW //Utility.log(in.readLine()); 9@^N*
E+ sHeader=httpConnection.getHeaderFieldKey(i); ;BmPP, if(sHeader!=null) \`oP\|Z { s/\<;g:u^ if(sHeader.equals("Content-Length")) me+u"G9I; { 8mM`v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &WJ;s* break; "~:P-]`G } uGU-MC* } >v'@p else j^)=<+Q;= break; *bl|[(pP } 6c[Slq!KA } ZU68\cL catch(IOException e){e.printStackTrace ();} 8O| w(z catch(Exception e){e.printStackTrace ();} =v(&qh9Q2 HXb^K U:q4OtiP Utility.log(nFileLength); OD6dMql -,qGEJ a^eR~efdu@ return nFileLength; ufB9\yl{~ } Egi(z9|Pp DCSmEy`. )u=46EU_ //保存下载信息(文件指针位置) 4Dw|
I${O private void write_nPos() t; b1<TLn0 { _+ERX[i try{ x }.&?m output = new DataOutputStream(new FileOutputStream(tmpFile)); jP31K{G? output.writeInt(nStartPos.length);
MZ%S3' for(int i=0;i<nStartPos.length;i++) V( =3K"j { *(o^w'5 // output.writeLong(nPos); p>1Klh:8.' output.writeLong(fileSplitterFetch.nStartPos); c?}{>ig/) output.writeLong(fileSplitterFetch.nEndPos); ekCt1^5Y } "Z#MR`;&29 output.close(); #&Fd16ov } {4B7a6 catch(IOException e){e.printStackTrace ();} V>"NVRY catch(Exception e){e.printStackTrace ();} `^:
v+! } GXwQ
)P5] :MILOwF ~EO=;a_ //读取保存的下载信息(文件指针位置) &`}ACTY'P private void read_nPos() <ahcE1h { ?MD\\gN try{ 4`p[t;q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); )AXa.y int nCount = input.readInt(); i|N(=Z= nStartPos = new long[nCount]; ) %bY2
pk nEndPos = new long[nCount]; 6Z!OD(/e for(int i=0;i<nStartPos.length;i++) 7,ffY/ { V/t- nStartPos = input.readLong(); ,a\pdEPj nEndPos = input.readLong(); 24I~{Qy } V&>mD"~MP input.close(); , R $ZZ4 } 7Yly^ catch(IOException e){e.printStackTrace ();} /S`d?AV catch(Exception e){e.printStackTrace ();} e[%g'}D:- } Ew2ksZ>B]& J72YZrc o%l|16DR private void processErrorCode(int nErrorCode) ^w~Utx4 { PHqIfH [ System.err.println("Error Code : " + nErrorCode); j6&7tK, } cp5 Am)XbN')1 gg QI //停止文件下载 htHnQ4Q public void siteStop() ZJ}|t { "uD^1'IW2 bStop = true; Zl7m:b2M for(int i=0;i<nStartPos.length;i++) _.BX#BIF fileSplitterFetch.splitterStop(); uDG#L6 `AxhA.&V :\,3=suWq } X-J<gI(Y } Ng1uJa[k!d //负责部分文件的抓取 XkuZ2( **FileSplitterFetch.java yWZ%|K~$ */ qb$f ,E[ package NetFox; j~`rc2n% =@go;," ;T?4=15c import java.io.*; I~NQt^sg import java.net.*; 3&7$N#v nnBl:p>< k 7V KTI:5y public class FileSplitterFetch extends Thread { Oz7WtN H8?Kgaj~vf ccJ!N String sURL; //File URL L
}&$5KiwV long nStartPos; //File Snippet Start Position ^n8r mh_% long nEndPos; //File Snippet End Position I:,D:00+ int nThreadID; //Thread's ID Wo~#R boolean bDownOver = false; //Downing is over y1+~IjY boolean bStop = false; //Stop identical ee{8C~ FileAccessI fileAccessI = null; //File Access interface O;~dao Pdw[#X<[` 9Sk?tl public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -<.b3M h { mqb6 MnK - this.sURL = sURL; e$y VV# this.nStartPos = nStart; ~$Pz`amT| this.nEndPos = nEnd; FT.;}!"l nThreadID = id; Oj^qh+r fileAccessI = new FileAccessI(sName,nStartPos);//定位 ) ]3(ue } y}!}*Qj+/ BjIKs~CT |HMpVT-;j public void run() Z4@GcdZ { *WpDavovyB while(nStartPos < nEndPos && !bStop) i& ybvTl { (lR9x6yf <X1^w h?ZxS try{ x"QZ}28(t URL url = new URL(sURL); FZ^j|2.L* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V+2C!)f( httpConnection.setRequestProperty("User-Agent","NetFox"); 9`p|>d!. String sProperty = "bytes="+nStartPos+"-"; dSm; e_s httpConnection.setRequestProperty("RANGE",sProperty); ULIpb Utility.log(sProperty); ESt@%7.F Zqnwf x-HN]quhe InputStream input = httpConnection.getInputStream(); =g+Rk+ jn //logResponseHead(httpConnection); "iY=1F"\R .#ASo!O5q hIv8A_>@` byte[] b = new byte[1024]; I,d5Y3mC int nRead; FOx&'dH%@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) O$,MdhyXC { >|@i8?|E nStartPos += fileAccessI.write(b,0,nRead); ~i y]X:U //if(nThreadID == 1) ?#0|A?U // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0O:')R& } D<d4"*qo HRxA0y= bI"_hvcFp Utility.log("Thread " + nThreadID + " is over!"); :7-2^7z) bDownOver = true; :AM5EO //nPos = fileAccessI.write (b,0,nRead); &?xZHr` } -*T<^G;rK catch(Exception e){e.printStackTrace ();} ij<6gv~ n" } c;dMXv } e=m=IVY#W 1$#{om9 fyE#8h_>4 //打印回应的头信息 s35`{PR public void logResponseHead(HttpURLConnection con) aX$Q}mgb { 3EN(Pz L for(int i=1;;i++) _`(WX;sK { ;9rS[$^$O String header=con.getHeaderFieldKey(i); "bC1dl< if(header!=null) t5Oeb<REz //responseHeaders.put(header,httpConnection.getHeaderField(header)); O.% $oV Utility.log(header+" : "+con.getHeaderField(header)); :]hNw1e else #7}1W[y9}l break; y:R!E *.L' } 86AZ)UP2D } 7}2Aq B<" `<oG@| M)JKe!0ad1 public void splitterStop() ,s9gGCA { A3|hFk bStop = true;
:ENdF `nC } KtO|14R: 45aUz@ _* m<Z;Et } e>] gCa =+z +`ot NtfzAz/ /* aVvma= **FileAccess.java x,% %^( *//文件访问(定位,写) a7@':Rb n package NetFox; ("r\3Mvs import java.io.*; .V
lPyY J_S8=`f% public class FileAccessI implements Serializable{ $&~moAl 2t,N9@u=UN //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 J{!U;r!6 RandomAccessFile oSavedFile; |Fi{]9(G2 long nPos; 6|G&d>G$_ <%iRa$i5 yCvP-?2 public FileAccessI() throws IOException |8q:sr_ { j"F?^0aR,Q this("",0); L}a-c(G+8 } 1p5n}| DEw>f%&4 BICG@ public FileAccessI(String sName,long nPos) throws IOException .mbqsb]&Y { @u @~gEt oSavedFile = new RandomAccessFile(sName,"rw"); qipV'T,S this.nPos = nPos; 2rV]n oSavedFile.seek(nPos); OAauD$Hh } \_]X+o; SNJSRqWL/ 4OaU1Y[ public synchronized int write(byte[] b,int nStart,int nLen) tiGBjTPt { jP{&U&!i int n = -1; yiw4<]{IX try{ `+m:@0&L oSavedFile.write(b,nStart,nLen); y '[VZ$^i n = nLen; Gl"|t't( } N<PDQ catch(IOException e) 0MI4"< { .0Kc|b=w e.printStackTrace (); Uc;~q-??# } 0,/I2!dF? jQrj3*V |z7V1xF return n; hp1+9vEN } -|GKtZ]} uCr :+"C \(A A|; } (Z0_e&=* ^B)f!HtU QR2S67- /* ~].?8C.>* **SiteInfoBean.java
CkV5PU */ Qhq' %LR package NetFox; 3_ly"\I\ v YJ9G"E ;_=N
YG. public class SiteInfoBean { PU,%Y_xR UCt}\IJ /go|r ' private String sSiteURL; //Site's URL )qRH?Hsb7 private String sFilePath; //Saved File's Path Vel}lQD private String sFileName; //Saved File's Name %s! |,Cu private int nSplitter; //Count of Splited Downloading File H76iBJ66 s IFE:/1, g<N;31:c\ public SiteInfoBean() ^)(-7H {//nSplitter的缺省值为5 xg}Q~,: //default value of nSplitter is 5 bksv2@ar this("","","",5); ?I[*{}@n" } :
eCeJ~&E 3vs{*T" 0|Xz-Y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N=PSr 4 { EE^x34&= sSiteURL= sURL; kuI~lBWI sFilePath = sPath; `a%MD>R_Lg sFileName = sName; g#MLA5%=u this.nSplitter = nSpiltter; Gp{,v p$t|eu
q;}iW:r&Q } j4<K0-? Xhq7)/jp NS65F7<& public String getSSiteURL() P(3k1SM { Sx[
eX,q return sSiteURL; P6&%`$ } egvb#:zW? R
RE8|%p;B m"T}em# public void setSSiteURL(String value) !E_Zh*lgm { u0GHcpOm sSiteURL = value; `BQv;NtP } Z\$M)e8n -V4%f{9T3 QgI[#d{ public String getSFilePath() y^"@$ { ~nTj't2R return sFilePath; kU+|QBA@ } L
R\LC6kM drMMf[ H %c6I public void setSFilePath(String value) lxm/*^
{ M.K^W ` sFilePath = value; XC5/$3'M& } AN:yL
a! J\Hv42 *i}X(sfe public String getSFileName() qiB~ { o K>(yC[ return sFileName; S3:AitGJ } lH;V9D^ A#6zINK#B LQHL4jRXU public void setSFileName(String value) {O9(<g { 8Z0x*Ssk sFileName = value; Z2gWa~dBC } {nbT$3=Zt <)p.GAZ Lo~;pvv public int getNSplitter() 1_<x%>zG { 59O-"Sc[ return nSplitter; o//h|f U@ } %uN<^`JZ ]q.%_ O 5:bdt. public void setNSplitter(int nCount) Z(7kwhP[` { g_1#if& nSplitter = nCount; fO$){(]^ } dYwkP^KB } v,S5C 4WJY+) p_h/hTi /* QYMfxpiC **Utility.java yo=L1;H */ Bz<hP*.O package NetFox; ZRG
Cy5Rk >Jmla~A c3 O/#* public class Utility { F?|Efpzow? *m}8L%<HT X>Vc4n<} public Utility() =w!ik9 { ~x^y5[5{ Wk<fNHg _"ciHYHBQ } RkE)2q[5 *3H=t$1G} //线程睡眠 _Xt/U>N public static void sleep(int nSecond) 16zRe I( { V9,<> try{ 8i154#l+\ Thread.sleep(nSecond); dMH_:jb } GLn=*Dh# catch(Exception e) r*+~(83k { .`}TND~ e.printStackTrace (); @"@|O>KJ } q1T)H2S } ->rqr# {5~h //日志 F(yR\)!C public static void log(String sMsg) SO=gG 2E {
xgcxA: System.err.println(sMsg); Cgx:6TRS } k1<^Ept `Pvi+:6\Y 8f9wUPr public static void log(int sMsg) ZC N}iQu4 { [(heE
System.err.println(sMsg); %dzt'uz } TP
rq:"K } NX&dJ
6a uQIPnd(V ?>}p'{I /* Nvgi&iBh8 **TestMethod.java i%-yR DIX */ Q>, &@ package NetFox; z2iMpZ (oGYnN,2 xoKK{&J public class TestMethod { Byc;r-Q5V J'}+0mln m$p}cok#+S public TestMethod() rLsY_7! { ///xx/weblogic60b2_win.exe 5vyg-' try{ A|\A|8=b SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,`}yJ*7 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); R iLl\S# SiteFileFetch fileFetch = new SiteFileFetch(bean); "E\vdhk fileFetch.start(); ,~Mf2Y#m0p } ^%$IdDx catch(Exception e){e.printStackTrace ();} 9;+&}:IVS h$&Tg_/'#D CPJ21^ } O>' }q/ ]lwf6' +MX~1RU+ public static void main(String[] args) x4I!f)8Q { :}e< new TestMethod(); 8\rca:cF
} #yochxF_ } f)*?Ji|5F 点击下载更多相关资料
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