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/* v2Bks2 **SiteFileFetch.java |f0KIb}d */ WV"{oED package NetFox; 8V(#S:G35 import java.io.*; "syf@[tz7 import java.net.*; /\KB*dX MW+]w~7_Q b|*A%?m public class SiteFileFetch extends Thread { =e,2/Ep{i c.PPVqx n'JwT!
A SiteInfoBean siteInfoBean = null; //文件信息Bean %!HmtpS long[] nStartPos; //开始位置 q*<Df=+B long[] nEndPos; //结束位置 1qb 3. FileSplitterFetch[] fileSplitterFetch; //子线程对象 Bk1Q.Un long nFileLength; //文件长度 BS#@ehdig boolean bFirst = true; //是否第一次取文件 KPUc+`cN% boolean bStop = false; //停止标志 }IGr%C(3% File tmpFile; //文件下载的临时信息 G?MNM -2 DataOutputStream output; //输出到文件的输出流 xF_ Y7rw1w '+|{4-V //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) s]r"-^eS3 public SiteFileFetch(SiteInfoBean bean) throws IOException _Ucj)Ud k { 7@m siteInfoBean = bean; :(Feg 2c //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); B" wk:\zC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); GjA;o3( if(tmpFile.exists ()) VWG#v#o { K{HRjNda# bFirst = false; 81/Bn! read_nPos(); l\*} } W]n%$a else %u43Pj { .Lp0_R@ nStartPos = new long[bean.getNSplitter()]; Xt /muV nEndPos = new long[bean.getNSplitter()]; PZRpH } ~/hP6* 8Hs>+Udl `yHV10 /z,sM"d } X{ZBS^M QKbX^C w=3@IW public void run() iR(A^ { {`~{%2ayq7 //获得文件长度 ts%@1Y? //分割文件 S0g5Ym
ia //实例FileSplitterFetch 2[Q*?N //启动FileSplitterFetch线程 wI}5[m //等待子线程返回 E'&UWDh try{ 7##nY3",^ if(bFirst) ^`\c;!)F< { IX^k<Jqr nFileLength = getFileSize(); Jnm{i|6N if(nFileLength == -1) f
7et { 7^Jszd:c08 System.err.println("File Length is not known!"); ^Y~ ,s } =6q?XOM else if(nFileLength == -2) o'%F*>#v { C&3#'/& System.err.println("File is not access!"); $[[6N0}*: } or~o' else WUdKj { Z.:5<oEKg for(int i=0;i<nStartPos.length;i++) {`KgyCW: { C_PXh>H]' nStartPos = (long)(i*(nFileLength/nStartPos.length)); U{LDtn%@h6 } bP Er+?fu for(int i=0;i<nEndPos.length-1;i++) )~O{jd
{ JXGIVH?Rpu nEndPos = nStartPos[i+1]; Rmn| "ZK } YurK@Tq7 nEndPos[nEndPos.length-1] = nFileLength; 3>0/WbA:7E } /,/T{V[ } 1B6Go <hdR:k@# \"_;rJ{!aE //启动子线程 *2 4P T7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; xh@H@Q\ for(int i=0;i<nStartPos.length;i++) doP4N6 { sG0cN;I]t fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /zuU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;#3!ZB:} nStartPos,nEndPos,i); Q2^}NQO= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); vjZX8KAiZ fileSplitterFetch.start(); ~{Tus.jk } T
{(6*^g<B // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 20zIO.&o siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "KW\:uc / // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @6
gA4h nEndPos = " + nFileLength); 0$}+tq+ // fileSplitterFetch[nPos.length-1].start(); A7+eWg{ [ #A!B#` yXppu[= //等待子线程结束 M)I&^mm39 //int count = 0; 5U3="L //是否结束while循环 :5U(}\dL{ boolean breakWhile = false; ',kYZay 4zpprh+`K /r[0Dw while(!bStop) ub+>i { 0RYh4'=F write_nPos(); SG8|xoL Utility.sleep(500); HP. j. breakWhile = true; 6;I&{9 UG&/0{j5XV G}BO!Z6 for(int i=0;i<nStartPos.length;i++) Tp)-L0kD_k {
YmB
z$ if(!fileSplitterFetch.bDownOver) F FR_1Vf { K$#(\-M
breakWhile = false; -g;iMqh# break; -7'>Rw } {{SQL)yJ } G0CmY43 if(breakWhile) _s|C0Pt break; ~hE"B)
e tE3!; -AD3Pd|Y[ //count++; ;8|uY%ab //if(count>4) =6ZZ/+6b // siteStop(); Ct|iZLh`j } Eae]s8ek9 N=zrY`Vd 3)atqM)i System.err.println("文件下载结束!"); %:N5k+} } ~-A5h( catch(Exception e){e.printStackTrace ();} yGZb } $khWu>b ^Ml)g=Fq 'r(}7>~fC //获得文件长度 zK k;&y|{ public long getFileSize() ?bmP<(N5/ { T.`E DluG int nFileLength = -1; .N5}JUj try{ 5``/exG> URL url = new URL(siteInfoBean.getSSiteURL()); ,Tvk&<!0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Dx 4?6 httpConnection.setRequestProperty("User-Agent","NetFox"); *-3K],^a }/SbmW8(1 a7%5Qg9B; int responseCode=httpConnection.getResponseCode(); nP0|nPWz# if(responseCode>=400) O<Ht-TN& { ou6yi;
l% processErrorCode(responseCode); @4sv(HyDY return -2; //-2 represent access is error (05/}PhB` } 2%. A{! pu0IhDMn 3-lJ] 7OT String sHeader; }_@*, 9=ns.r U;`N:~|p# for(int i=1;;i++) r_@;eh { M//q7SHh //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -3_-n*k! //Utility.log(in.readLine()); Al5E sHeader=httpConnection.getHeaderFieldKey(i); rs]%`"&= if(sHeader!=null) g&`e2|[7 { #[qmhU{s if(sHeader.equals("Content-Length")) =n
cu#T] { 8l~]}2LAs nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ltwX- break; aiF7\^aw$ } brl(7_2 } r0+lH:G*q else g`d5OHvOo break; ;
"ux{ . } 0x4Xs } K``MS catch(IOException e){e.printStackTrace ();} #OqQD6 catch(Exception e){e.printStackTrace ();} plh.-" I
^?TabL Q0#oR[( Utility.log(nFileLength); Rf^$?D&^ |j^^*z@ ~-.}]N+([ return nFileLength; $.a<b^.Xi } o:.={)rX 5@%$M$E MT[V1I{LV //保存下载信息(文件指针位置) IGV @tI private void write_nPos() Nv,1F { -=H*(M try{ yS[:C
2v output = new DataOutputStream(new FileOutputStream(tmpFile)); 0BMKwZg output.writeInt(nStartPos.length); sX.L for(int i=0;i<nStartPos.length;i++) EeIV6ug { )D{L<.i_ // output.writeLong(nPos); b^~ keQ output.writeLong(fileSplitterFetch.nStartPos); A5S9F8Q/] output.writeLong(fileSplitterFetch.nEndPos); 1p[C5j3 } <4ccT l output.close(); ` .|JTm[ } [a:yKJ[ catch(IOException e){e.printStackTrace ();} ,|D_? D)U catch(Exception e){e.printStackTrace ();} (#k>cA(} } )e d5~ok 4/;hA
z jVC`38| //读取保存的下载信息(文件指针位置) 5=WzKM private void read_nPos() !_ZknZTT { 4zkn~oy try{ %PRG;kR DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); (OwAhjHE int nCount = input.readInt(); ea kj>7\s nStartPos = new long[nCount]; )r3}9J nEndPos = new long[nCount]; :hJHjh for(int i=0;i<nStartPos.length;i++) n+QUT { /{>$E>N; nStartPos = input.readLong(); cKJf0S:cx- nEndPos = input.readLong(); cXU8}>qY7 } w#vSZbh input.close(); Zyt,D|eWj } "(zvI>A catch(IOException e){e.printStackTrace ();} #tg,%*.s catch(Exception e){e.printStackTrace ();} >Akrbmh5 } 9>yLSM,!rS M<s16 4[m})X2( private void processErrorCode(int nErrorCode) xP#vAR { F0:|uC4 System.err.println("Error Code : " + nErrorCode); $\M<gW6 }
J@sH(S 6_]-&&Nr 4Vl_vTz{i //停止文件下载 eG&\b-% public void siteStop() d3-F?i
5d { *`2.WF@E) bStop = true; =lT~ for(int i=0;i<nStartPos.length;i++) I,TJV)B fileSplitterFetch.splitterStop(); ,cZhkXd
l/1u>' GKT2x '(e } Fa<>2KkOr } W!vN(1:( //负责部分文件的抓取 G&=4@pLY5 **FileSplitterFetch.java ,)/gy)~# */ (3cJ8o>& package NetFox; hgIqr^N9 H'KCIqo
P 4Vi~zMX
import java.io.*; BIGln`;,f import java.net.*; wJyrF tpu2e*n-| URU,&gy= public class FileSplitterFetch extends Thread { 0U|t@&q Hdvtgss! HYcLXh vgu String sURL; //File URL G>Fk
) long nStartPos; //File Snippet Start Position \WS2g"( long nEndPos; //File Snippet End Position KaVNRS int nThreadID; //Thread's ID s?Lx\?T boolean bDownOver = false; //Downing is over Z|3fhaT boolean bStop = false; //Stop identical .#^ta9^t7 FileAccessI fileAccessI = null; //File Access interface ?tzJ7PJ~B be?>C
5 ],`xd_=]= public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 7egE." { aa|u*afWQ this.sURL = sURL; UWU(6J|Fk this.nStartPos = nStart; ] V|hDU=t this.nEndPos = nEnd; xgDd5`W nThreadID = id; 5OEo(& fileAccessI = new FileAccessI(sName,nStartPos);//定位 a8 X}r. } #IJm*_J< 44Dytpvg AWaptw_p*
public void run() /{1s U}k- { yyPQ^{zD while(nStartPos < nEndPos && !bStop) "PgVvm#w' { MB7UI8 M3XG s|gw 6HroKu try{ 9S'u1% URL url = new URL(sURL); E_q/*}]pE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L
hp httpConnection.setRequestProperty("User-Agent","NetFox"); x,wXR=H String sProperty = "bytes="+nStartPos+"-"; V52>K$j httpConnection.setRequestProperty("RANGE",sProperty); @JW HG1qJ Utility.log(sProperty); CzMCd
~*7R 0gRj3al( 8Z&M}Llk InputStream input = httpConnection.getInputStream(); ,LE 15}, //logResponseHead(httpConnection); vCvjb\S ML _$/ 1G}f83yR byte[] b = new byte[1024]; 4^r4O# int nRead; iGq%|o> while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) FOPfob[ { F
u> nStartPos += fileAccessI.write(b,0,nRead); vYFtw L` //if(nThreadID == 1) @%lkRU) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $>JfLSyC } 5)5$h]Nz> uzoI*aqk-s -L-#-dK' Utility.log("Thread " + nThreadID + " is over!"); 2[Ofa(mkkp bDownOver = true; sKy3('5; //nPos = fileAccessI.write (b,0,nRead); <OH{7>V } WC Tmf8f catch(Exception e){e.printStackTrace ();} e{Q;,jsh } ai7R@~O:_k } "D\>oFu BGd# \2 Bd'X~Vj< //打印回应的头信息 ?"F9~vx&G public void logResponseHead(HttpURLConnection con) ol0i^d*9F { (k^%j for(int i=1;;i++) 7vo8lnQ{ { Ln'y 3~@ String header=con.getHeaderFieldKey(i); ,.kJF4s& if(header!=null) U[0x\~[$K //responseHeaders.put(header,httpConnection.getHeaderField(header)); HVJqDF Utility.log(header+" : "+con.getHeaderField(header)); a8WWFAC[ else }/w]+f* break; m?<^b_a} } z@g%9|U } &k@\k<2Ia XE>w& LR "=( public void splitterStop() XF&_**0n { `@q\R-` bStop = true; ^B_SAZ&%% } kYhV1I )[S#:PP r>e1IG } $7QGi|W*k l
k
sNy lfAiW;giJ /* TU6(Q,Yi| **FileAccess.java mtg=v@~ *//文件访问(定位,写) xfF;u9$; package NetFox; tj ?%{L import java.io.*; r|63T%q! HA J[Y3d< kwXUjnp public class FileAccessI implements Serializable{ `h|Y0x cP",szcY //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Dm@h'* RandomAccessFile oSavedFile; n^q%_60H long nPos; qyBC1an5, 'fs
tfk PNz]L public FileAccessI() throws IOException bUsX~R- { *rgF[
: this("",0); y6dQ4Whv& } rB|1<jR vX7U|zy ?n]adS{ public FileAccessI(String sName,long nPos) throws IOException k:&vW21E { yq?\.~ax oSavedFile = new RandomAccessFile(sName,"rw"); }S$OE))u this.nPos = nPos; 5hHLC7tT9 oSavedFile.seek(nPos); 3ey.r%n } cL<,]%SkE X
}`o9]y xnC:?d public synchronized int write(byte[] b,int nStart,int nLen) @Di!~e6 { AdpJ4}|0 int n = -1; gg/ts]$ try{ <PFF\NE9 oSavedFile.write(b,nStart,nLen); q;lR|NOh n = nLen; (rc7Cp3 } W}y)vrL catch(IOException e) c1q; { Gshy$'_e e.printStackTrace (); EJP] E) } '6kD6o_p1 E/hT/BOPK i)] f0F return n; oiIl\#C } [dR#!"6t id588Y78 >=d 5Scix } !PA ><F '`YZJ ]WzeJ"r {3 /* ^9`|QF **SiteInfoBean.java joDqv,iW8 */ `M*jrkM]x package NetFox; op@=0d?? g${JdxR: bSz@@s. public class SiteInfoBean { V%{WH} ek. @ 0c rq^%)tR private String sSiteURL; //Site's URL =k*XGbU private String sFilePath; //Saved File's Path kdWUz( private String sFileName; //Saved File's Name <$@I*xk[ private int nSplitter; //Count of Splited Downloading File ,N_/J4Us wMw}3qX$j J0
dY%pH# public SiteInfoBean() Vo6+| ztk| {//nSplitter的缺省值为5 vsyg u //default value of nSplitter is 5 n=PfV3B this("","","",5); u(fZ^ } gkX7,J-0 P^# 4m Y]*&\Ex"\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) j/_&]6! { D^2lb"3 sSiteURL= sURL; @}19:A<' sFilePath = sPath; \>>P%EU, sFileName = sName; -$kIVh this.nSplitter = nSpiltter; b\KbF/T FrUqfTi+W /\_n5XI1 } +I-BqA9 kh{3s:RQfC 1hlU
6=Y public String getSSiteURL() MRw4?HqB { ?:M4GY"gV return sSiteURL; [KFCc_: } q2r$j\L% o
^ \+Ua .P`QCH;Ih public void setSSiteURL(String value) $}r.fji,c { Zxd*%v; sSiteURL = value; "OA{[)fw" } =E>P,"D zfE8=d8U >MKj~Ud public String getSFilePath() zH Z;Y^{+ { t1 U+7nM return sFilePath; K9.Gjw } '.;{"G.@' _~MX~M3MB wPm public void setSFilePath(String value) |`Noj+T47I { (hdu+^Qj= sFilePath = value; SASLeGaV } jI0gf&v8 c|`$
h }IZw6KiN public String getSFileName() _{;_wwz { 9PACXW0 return sFileName; hd i0YL } lZ7
$DGe x{8h3.ZQ, 0MroHFh9` public void setSFileName(String value) @&EIH,c { ,Pcg+^A sFileName = value; [FrLxU } czU" V2`Ud[ uDXV@;6< public int getNSplitter() Z]R#F0"U { qB,0(I1-! return nSplitter; zRD-[Z/- } cV0CI& ,c^nW "OK[uug public void setNSplitter(int nCount) ypG*41 { 1AN$s
nSplitter = nCount; ppNMXbXR } NN=^4Xpc: } 23i2yT G`kz 0Vk U|Gy 9" /* [:#K_EI5% **Utility.java T]Ai{@i */ _K!.TM+9 package NetFox; |idw?qCn 2nC,1%kxhq rIJPgF public class Utility {
UWqD)6 mICEJ\`x ni%)a public Utility() v\4<6Z:4 { *9$SFe|&n: .,p=e$x] #"rK1Z } ~=iH*AQR K)mQcB-"? //线程睡眠 h*C!b?:" public static void sleep(int nSecond) )MK$E,W { Ze8.+Ee try{ N'9T*&o+ Thread.sleep(nSecond); :&TM0O } aK
-x{ catch(Exception e) M @-:iP { u "jV#,, e.printStackTrace (); RU4X#gP4Vh } (@5`beEd } (^y"'B OVDuF&0 //日志 oV0 45G public static void log(String sMsg) &=jPt%7#M { <A8>To< System.err.println(sMsg); 6V]m0{:E } :,aY|2si Sk>=C0f: !pw)sO~ public static void log(int sMsg) Vi-Ph;6[ { f+uyO7 System.err.println(sMsg); +"<+JRI(M5 } *0^~@U } F[Mwd &P@ fxPg"R!1i gAdqZJR%] /* :M6v<Kg{; **TestMethod.java =dDPQZEin */ `s T;\ package NetFox; ,P`NtTN- /CNsGx%% ?@$xLUHR4 public class TestMethod { .cQO?UKK Wy7w zt G/Sp/I<d public TestMethod() n]'
r3 { ///xx/weblogic60b2_win.exe XyE$0i~t try{ ^ZQMRNP{r SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2.niB> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,GYQ,9: SiteFileFetch fileFetch = new SiteFileFetch(bean); 6d6cZGS[: fileFetch.start(); )wM%Ul<s } Mc asnjC catch(Exception e){e.printStackTrace ();} ;un@E: z80P5^9 bc'IoD/ } 2 wY|E<E ,.QJS6Yv 8.B'O>\T public static void main(String[] args) }^Q:Q\ { Mt-r`W3 q new TestMethod(); 1l#46?]~ } j@z IJ } HbA/~7 点击下载更多相关资料
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