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/* Qx% ]u8s **SiteFileFetch.java Q`4]\)Dp */ DJ#z0)3<p package NetFox; .wv!; import java.io.*; zcTY"w\b import java.net.*; -a(\(^NW <78LB/: oL69w1 public class SiteFileFetch extends Thread { -$J%.fdPs U~Ai'1?xz 1>1ii SiteInfoBean siteInfoBean = null; //文件信息Bean t <Z)D0. long[] nStartPos; //开始位置 .Iret: long[] nEndPos; //结束位置 }hjJt,m FileSplitterFetch[] fileSplitterFetch; //子线程对象 $EuWQq7OI2 long nFileLength; //文件长度 ;PrL)! boolean bFirst = true; //是否第一次取文件 al3[Ph5G boolean bStop = false; //停止标志 ;<yVJox File tmpFile; //文件下载的临时信息 $*u{i4b DataOutputStream output; //输出到文件的输出流 I;!zZ.\ ,UD,)ZPf[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /rqaUC )A public SiteFileFetch(SiteInfoBean bean) throws IOException Q hHexr6 { 5E#koy7
$s siteInfoBean = bean; H@8g 9;+ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H#joc0?P tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ZoiCdXvTN if(tmpFile.exists ()) G *f5B { {=NHidi~ bFirst = false; vKX
$Nf read_nPos(); zDk^^' } U/JeEI%L else -;?5<>zZ { U*'
YGv nStartPos = new long[bean.getNSplitter()]; 62Ab4! nEndPos = new long[bean.getNSplitter()]; ~!,Q<? } 3-Q*umh Q1Jkt 3}H"(5dL}z jnK8
[och } <h/\)bPB l_!.yV{ s'V8PN+- public void run() C_[V[k0( { 1D fB9n //获得文件长度 %^l77:O //分割文件 qO<'_7TN[ //实例FileSplitterFetch +|OkT //启动FileSplitterFetch线程 dQ8}mH! //等待子线程返回 3:rH1vG.m try{ #zcp!WE.OI if(bFirst) g#V3u=I8~ { W?"Z>tgp nFileLength = getFileSize(); $
;/Ny)" if(nFileLength == -1) v UAYYe { %<e\s6|P: System.err.println("File Length is not known!"); *HmL8c } 'nNw else if(nFileLength == -2) P'D~Y#^ { XbJ=lH System.err.println("File is not access!"); J,fXXi)J } #ZIV>(Q\H else xXK7i\ny { kNW&rg for(int i=0;i<nStartPos.length;i++) $2F*p#l(<Z { ,z)7rU` nStartPos = (long)(i*(nFileLength/nStartPos.length)); &b}!KD1 } lC6#EU; for(int i=0;i<nEndPos.length-1;i++) "w`f>]YLA { _Bh-*l?K> nEndPos = nStartPos[i+1]; Zg7~&vs$ } c3|;'s nEndPos[nEndPos.length-1] = nFileLength; sp[nKo^ } J1"u,H F*( } ..7"&-?g{4 gtz!T2% +I2P{7 //启动子线程 C["^%0lj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; g?(Z+w4A
3 for(int i=0;i<nStartPos.length;i++) 5SX0g(C { 9U58# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IqEY.2KN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L5cNCWpo nStartPos,nEndPos,i); Tp<=dH%$%" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V/|Ln*rm fileSplitterFetch.start(); 7 .+kcqX } tF&%7(EU3 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P _Zf(`jJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); vsoj] R$C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", h|%d=`P, nEndPos = " + nFileLength); D}!U?]la& // fileSplitterFetch[nPos.length-1].start(); sXl7 b_Ba0h= hS
+;HB, //等待子线程结束 lyZof_/* //int count = 0; "=|yM~V //是否结束while循环 yN~=3b> boolean breakWhile = false; SNff cY#TH|M Dw[w%uz while(!bStop) ?Dm! ;Z+7 { Aid{PGDk write_nPos(); r9s1\7]x Utility.sleep(500); f|6%71 breakWhile = true; Z/;rM8[{& o|alL- ;=)CjC8) for(int i=0;i<nStartPos.length;i++) 9z_Gf]J~ { e@0wF59 if(!fileSplitterFetch.bDownOver) |}q0G~l { Os@ofnC breakWhile = false; S~/iHXm break; W
.Hv2r3 } PU?kQZU~) } g"C$B Fc if(breakWhile) 6tG9PG98q9 break; 51;(vf -zc9=n<5 30<dEoF //count++; %7
J //if(count>4) @[
:s P // siteStop(); [(btpWxb^ } =nid #<X e>z7?"N 8%`Sx[ System.err.println("文件下载结束!"); 4f"be } &,$A7: catch(Exception e){e.printStackTrace ();} !0Q(x } >r]# 77d rKJ%/7m -Qn:6M>w^ //获得文件长度 sUbZVPDr public long getFileSize() $AsM 9D<BE { -'q=oTZ int nFileLength = -1; 79x^zqLb try{ 1Kc*MS URL url = new URL(siteInfoBean.getSSiteURL()); "n]B~D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &Puu Xz< httpConnection.setRequestProperty("User-Agent","NetFox"); lc5NC;JR OvK_CN{ ^Gd<miw int responseCode=httpConnection.getResponseCode(); u5R^++ if(responseCode>=400) dr/!wr'&hS { 8sbS7*# processErrorCode(responseCode); rSEJ2%iF* return -2; //-2 represent access is error O]2h=M@q. } ^`dp!1.+ },f7I^s| )YnB6@=nyk String sHeader; ~^5uOeTZ~ ^R<= } cL1cBWd for(int i=1;;i++) n$=n:$`q { m
CdkYN# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); f%@Y
XGf //Utility.log(in.readLine()); CWDo_g$ sHeader=httpConnection.getHeaderFieldKey(i); dR=SW0Oa{ if(sHeader!=null) 41C=O@9m { ^OQ_iPPI if(sHeader.equals("Content-Length")) nK96A.B%p { VUt
6[~? nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]}5jX^j break; 2qn~A0r } -#Wc@\; } xHL{3^ else BM3)`40[] break; (wA|lK3 } 0`qq"j[6a } $@#nn5^IX catch(IOException e){e.printStackTrace ();} (ZI&'"H catch(Exception e){e.printStackTrace ();} \+>b W( Y5n pz^i 6 8_UQ. Utility.log(nFileLength); };KmMpBn m3|,c[M1 [Q$"+@jw return nFileLength; <Jvrmm[ } i2!{.*. nC*/?y*9 Y}WO`+Vf5 //保存下载信息(文件指针位置) 43VuH private void write_nPos() f~U|flL^ { k1cBMDSokO try{ 1R:h$*-z output = new DataOutputStream(new FileOutputStream(tmpFile)); HmiwpI output.writeInt(nStartPos.length); U{_O=S u for(int i=0;i<nStartPos.length;i++) 5_i&}c23Vn { +,KuYa{lu // output.writeLong(nPos); oC?b]tzj output.writeLong(fileSplitterFetch.nStartPos); |zUDu\MZ{ output.writeLong(fileSplitterFetch.nEndPos); {&4qknPd% } 0GG;o[< output.close(); 6D+k[oHZm } +tA rH
C] catch(IOException e){e.printStackTrace ();} jjbw.n+1 catch(Exception e){e.printStackTrace ();} );*GOLka } f2Slsl; (;M"'.C 8q0 .yhb //读取保存的下载信息(文件指针位置) :kUH>O private void read_nPos() MdKZH\z/ { m|y]j4 try{ ~cez+VQe DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "8rP?B( int nCount = input.readInt(); 9Z* vp^3 nStartPos = new long[nCount]; C8jZcs#4 nEndPos = new long[nCount]; q\/|nZO4 for(int i=0;i<nStartPos.length;i++) *V\kS { ]x Kmz nStartPos = input.readLong(); \\T
I4A^# nEndPos = input.readLong(); )I<.DN& } xv ja input.close(); mPu5%% } r*$"]{m} catch(IOException e){e.printStackTrace ();} ?+!KucTF
catch(Exception e){e.printStackTrace ();} y^XwJX-f } RHBEC@d[} ewLr+8 <FJ#Hy+ private void processErrorCode(int nErrorCode) Gmwn: { J2R<'( System.err.println("Error Code : " + nErrorCode); _Nj;Ni2rD } JDs<1@ \ [Cs2H8=# Vr^wesT\Hx //停止文件下载 Jk~T.p?tF public void siteStop() V-
vVb { $`Ou * bStop = true; n-\B z. for(int i=0;i<nStartPos.length;i++) +j<Nu)0iY fileSplitterFetch.splitterStop(); 0s8S`hCn> ,aN/``j= x?%vqg^r } /yOd]N;$ } AiyjrEa% //负责部分文件的抓取 qV}zV\Nz **FileSplitterFetch.java s4Wk2*7Mq */ OUs2)H61 package NetFox; o+nU { R_*\?^k|A tQ)8HVKF import java.io.*; $a-~ozr`C import java.net.*; 55;xAsG $+mmqc8 Gzs x0%`) public class FileSplitterFetch extends Thread { n*;I2 FV] Y,8M[UIK IOJ fv8 String sURL; //File URL &
=frt3 long nStartPos; //File Snippet Start Position FVSz[n long nEndPos; //File Snippet End Position N(
/PJJ~ int nThreadID; //Thread's ID uM\~*@ boolean bDownOver = false; //Downing is over c)lK{DC boolean bStop = false; //Stop identical A$oYw(m# FileAccessI fileAccessI = null; //File Access interface ~@-Az([H e8[*=& 8IX6MfR}C public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;Y~;G7 { nc3 1X this.sURL = sURL; |S4yol this.nStartPos = nStart; S`R
( _eD@ this.nEndPos = nEnd; 5!5P\o nThreadID = id; n3)g{K^ fileAccessI = new FileAccessI(sName,nStartPos);//定位 W=|B3}C? } >g F 4];NX TX*P*-' public void run() PGybX:L { R
sujKh/ while(nStartPos < nEndPos && !bStop) O@ "6)/ { 2V =}V`O> Z|~<B4#c try{ W9u( URL url = new URL(sURL); ad"&c*m[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zcA"\ httpConnection.setRequestProperty("User-Agent","NetFox"); v&?Bqj String sProperty = "bytes="+nStartPos+"-"; ^&,{ httpConnection.setRequestProperty("RANGE",sProperty); Z|j8:Ohz Utility.log(sProperty); =GLsoc-b :Z/ig% >#V8l@IH InputStream input = httpConnection.getInputStream(); .t["kaA //logResponseHead(httpConnection); lID5mg31 '[A>eC++ 5[ @4($q8 byte[] b = new byte[1024]; q_W NN/w int nRead; }we"IqLb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) i=SX_#b^ { m=n
V$H nStartPos += fileAccessI.write(b,0,nRead); H%/$Rqg //if(nThreadID == 1) {~=[d`t // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `HHbQXB } eR3!P8t zL>nDnL 4 U2K>\/ -~ Utility.log("Thread " + nThreadID + " is over!"); _o`'b80; bDownOver = true; Maq{H` //nPos = fileAccessI.write (b,0,nRead); 1W-!f% } bb#w]!q catch(Exception e){e.printStackTrace ();} s~TYzfA } "PuP J| } O,DA{> *m QXF>xZ~ LtNG<n)_BH //打印回应的头信息 %u!#f<"[ public void logResponseHead(HttpURLConnection con) m2 OP=z@) { JM M\ for(int i=1;;i++) AA@J~qd
u { K;YK[M1! String header=con.getHeaderFieldKey(i); dLo%+V#/A if(header!=null) O[-wm;_(=* //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8^HMK$ Utility.log(header+" : "+con.getHeaderField(header)); 1 iE else y_a~>S break; (I\aGGW } (3_2h4O } {)`5*sd V&qXsyg EI+.Q public void splitterStop() f)*}L? { gmrjCLj bStop = true; dp+wwNe } bk"` hq ww[STg dmf~w_(7 } uD<*g(R TCB<fS~U- ZfMJU /* :vc[ iZ **FileAccess.java B<_T"n'#b *//文件访问(定位,写) jp2l}C package NetFox; >j\zj] -" import java.io.*; Vrz<DB^-e qxE~Moht 3A'd7FJ0G public class FileAccessI implements Serializable{ '9i:b]Hru UD"e:O_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 L(}T-.,Slr RandomAccessFile oSavedFile; E7y<iaA{~ long nPos; ~!Onz wmO '0w'||#1 oXfLNe6>L public FileAccessI() throws IOException y8
`H*s@ { nuXaZRH this("",0); 00<iv"8 } #&&^5r-b- [L9e.n1 K2)),_,@5+ public FileAccessI(String sName,long nPos) throws IOException Q +qN` { RYmk6w!w oSavedFile = new RandomAccessFile(sName,"rw"); +-HaYB|p this.nPos = nPos; `/0X].s#o oSavedFile.seek(nPos); Qp%kX@Z' } IOt!A <A+Yo3|7 `W{Ye=|[d# public synchronized int write(byte[] b,int nStart,int nLen) qH"e:
wgL { fv#e 8y int n = -1; N'|zPFkg try{ Kkdd }j oSavedFile.write(b,nStart,nLen); =3""D{l n = nLen; kXv
-B-wOj } 8v c4J5 catch(IOException e) ${mHbqN { }_XKO\ e.printStackTrace (); P4ot,Q4 } @ttcFX1:W >:h
8T]F X]Sr]M^EK return n; 8`9!ocrM } A+NLo[swwu )7[>/2aGd '2v,!G]^
} r'k-*I 3fn6W)v? {v<Ig{{V /* GfPe0&h **SiteInfoBean.java 0t6s20*q */ (m~MyT#S package NetFox; B1J+`R3OX fHR1kuy h}rrsVj3 public class SiteInfoBean { p*n$iroy_{ Wvmf[!V; (\,mA-%E private String sSiteURL; //Site's URL $Ob]JAf} private String sFilePath; //Saved File's Path HFvhrG private String sFileName; //Saved File's Name XR]]g+Z private int nSplitter; //Count of Splited Downloading File ${0Xq k %\%1EZQ% Z9 }qds6 y public SiteInfoBean() b]Oc6zR,,~ {//nSplitter的缺省值为5 i#iY;R8 //default value of nSplitter is 5 h$4V5V this("","","",5); y @h^ } xL=g(FN(6L NS mo(c>5 L&q~5 9 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "f3, w { }0}J sSiteURL= sURL; V]`V3cy1+3 sFilePath = sPath; Td
X6<fVV sFileName = sName; -P@o>#Em this.nSplitter = nSpiltter; /$]dVvhX% N
y7VIh| g}L2\i688 } X7Cou6r ex&&7$CXc SDcD(G public String getSSiteURL() 6EP5n { ?)5}v4b return sSiteURL; (~zdS. } Eki7bT@/ Q^ bG1p//. nRb#M public void setSSiteURL(String value) ~|R"GloUw { @fPiGu`L sSiteURL = value; V92e#AR } \[+ZKj: 3Akb|r I]jVnQ>& public String getSFilePath() }m\ { W(a=ev2sa return sFilePath; FwmE1, } )TVyRY Z1 P=(\3ok #0hX)7(j public void setSFilePath(String value) =DcKHL(m { Xp4pN{h e sFilePath = value; +w%MwPC7` } OB;AgE@ Jg/WE1p> /8Ca8Ju public String getSFileName() Cp_"PvTmT { enDjP return sFileName; y~]>J^ } pV:X_M6 NcB^qv lHT? public void setSFileName(String value) kYmkKl_ { P0 hC4Sxf sFileName = value; "qMd%RP } pN1W|Wv2 7K%Ac X3<<f`X public int getNSplitter() Z
r { ]M-j_("& return nSplitter; "N D1$l } q: ?6 G#
.z((Rj u\Tq5PYXt public void setNSplitter(int nCount) "b|qyT* Sl { doW_vu nSplitter = nCount; QUH USDT } ROW8YTYb } |9@?8\ &3:-(:<U roVGS{4T\ /* p*8=($j4 **Utility.java rMdOE&5G */ wHEt;rc( package NetFox; Kj;Q;Ii */u_RJ zL+jlUkE
public class Utility { =j#uH`jgW &) T5V kL*
DU` public Utility() 6:fe.0H9 { +>M^p2l*& `gDpb.=Y pW 2NrBq@w } |~Z.l 9i;%(b{ //线程睡眠 RpOGY{[)[ public static void sleep(int nSecond) y
U
=) g { K7 -AVMY try{ zn@<>o8hU Thread.sleep(nSecond); <v>^#/.0 } ^<}9#q/rt catch(Exception e) %iPWg { ^Vso`(Ss e.printStackTrace (); M ~zA } J<'[P$D } ,.A@U*j 3CL/9C> //日志 2!Yq9,` public static void log(String sMsg) Ye% e! { xQ+UZc System.err.println(sMsg); Ti$G2dBO } eyUguA<lK\ ]V0V8fU| }E0~' public static void log(int sMsg) ~_8Dv<"a { `u$
Rd System.err.println(sMsg); lR5[UKr } /Jj7+? } }Z#KPI8\Q Ne#FBRu5 >Q3_-yY+ /* )O\w'|$G **TestMethod.java 'K&^y%~py, */ C@d*t? package NetFox; .8e]-^Z '2Q[g0VR |y1O M public class TestMethod { A0X'|4I 2 tD{c^
9< /5:2g#S4 public TestMethod() !z?& { ///xx/weblogic60b2_win.exe V6Z~#=EQ try{ 3E9 )~$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2iM]t&^<+ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -&q@|h' SiteFileFetch fileFetch = new SiteFileFetch(bean); 6`Hd)T5{w fileFetch.start(); B|d-3\sn } 3bYPi^ catch(Exception e){e.printStackTrace ();} BOt1J_;(rO CWT#1L= '3<T~t } ^AhV1rBB x{DTVa
6y2 3JYhF)G public static void main(String[] args) |\.:h":!0~ { |7%has3" new TestMethod(); A1Ru&fd! } AQ%B&Q(V1 } [~NJf3c" 点击下载更多相关资料
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