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/* "ulaF+ **SiteFileFetch.java h\dIp`H */
h!Q>h7 package NetFox; _AO0:& import java.io.*; "E8!{ import java.net.*; AH}
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Y9%yjh public class SiteFileFetch extends Thread { 8jZYy! F?dTCa )N=wJN1 SiteInfoBean siteInfoBean = null; //文件信息Bean YM;^c%
_7 long[] nStartPos; //开始位置 Oh^X^*I$@ long[] nEndPos; //结束位置 8%NX)hZyq} FileSplitterFetch[] fileSplitterFetch; //子线程对象 q"cFw${ long nFileLength; //文件长度
|z4 /4Y@ boolean bFirst = true; //是否第一次取文件 1dq.UW\ boolean bStop = false; //停止标志 Rsulp#[' File tmpFile; //文件下载的临时信息 p<+]+,|\~: DataOutputStream output; //输出到文件的输出流 W`\H3?C`xQ ~\/ J& //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) y#MLxm public SiteFileFetch(SiteInfoBean bean) throws IOException a=J?[qrx { CVUDN2 siteInfoBean = bean; A1@-;/H3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -Rvxjy)[N tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); .d fTv/n if(tmpFile.exists ()) 3}+/\:q* { X}!_p& WI bFirst = false; U!'lc}5 read_nPos(); %MIu;u FR } =MXF`k^} else she`_'?5 { r" D |1 nStartPos = new long[bean.getNSplitter()]; \xdt|:8 nEndPos = new long[bean.getNSplitter()]; 3xe8DD } 0g+@WK6y UtutdkaS dnx}c4P F>M$|Sc2 } zPmVECS d!d
3r W;A ^Y&Cm.w public void run() ^d"J2n,7L { oaKf{$vg //获得文件长度 V":BAn //分割文件 S ~_% //实例FileSplitterFetch I45A$nV#Q //启动FileSplitterFetch线程 {)[i\=,`{ //等待子线程返回 ceOjuzY try{ ^AM_A>HnG if(bFirst) :b>|U"ux { q5A+%# nFileLength = getFileSize(); ELPJ}moWZ if(nFileLength == -1) e%P;Jj476 { {,
|"Rpd System.err.println("File Length is not known!"); `~}7k)F( } bDkE*4SRX else if(nFileLength == -2) 8 N` $7^^ { *"5a5.`%, System.err.println("File is not access!"); `%Ghtm * } y"hM6JI else MT5A%|H e { I%&9`ceWY for(int i=0;i<nStartPos.length;i++) xo%iL { PHXP1)^}S nStartPos = (long)(i*(nFileLength/nStartPos.length)); t2:c@) } <d^7B9O?&w for(int i=0;i<nEndPos.length-1;i++) P=@lkF!\# { Po_OQJ:bd nEndPos = nStartPos[i+1]; <7 rK } %8tN$8P nEndPos[nEndPos.length-1] = nFileLength; )L!R~F
C }
'2tEKVb } cg.e(@( $SXxAS1 I5A^/=bf& //启动子线程 10rGA=x'( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; b>z.d- for(int i=0;i<nStartPos.length;i++) s`J=:>9* { hq*JQb;Y} fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \,EPsQV0? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), VqrMi *W6 nStartPos,nEndPos,i); P~<93 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V[M#qZS fileSplitterFetch.start(); acZHb[w } l!y
_P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D5>~'N3b siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (0Qq rNs // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", J9FNjM[qe nEndPos = " + nFileLength); t/ 1NTa // fileSplitterFetch[nPos.length-1].start(); _pGviGR ,OCTm%6e de6dLT>m //等待子线程结束 _e_%U<\4 //int count = 0; Sg$\ab $ //是否结束while循环 T/;hIX:R boolean breakWhile = false; $te,\$&} \i+h P1mz ,m?D\Pru while(!bStop) [J`G`s! { F"H!CJJu& write_nPos(); DG\YZV4 Utility.sleep(500); ] )L'Rk#4 breakWhile = true; -9I% \ Sby(l }tZAU\z for(int i=0;i<nStartPos.length;i++) N)*e^Nfb { +-\9'Q if(!fileSplitterFetch.bDownOver) P`
F'Nf2U { ;QQ7vo breakWhile = false; 5#)<rK break; HdUW(FZ } KL mB } BznA)EK?@ if(breakWhile) grdyiBSVn break; _ICDtG^ j~H`*R=ld# `_A?a_[* //count++; PJ@ ,01 //if(count>4) [Be53U{= // siteStop(); "T%'Rp`j| } p.] .M"A AV4HX\`{P0 cu^*x/0, System.err.println("文件下载结束!"); @!/fvP } <57l|}8 catch(Exception e){e.printStackTrace ();} /VO@>Hoh } _0q~s@- 8{fz0H.<? FqxOHovE //获得文件长度 1GE%5 public long getFileSize() nj0AO0 { k3[h'.ps int nFileLength = -1; 6xIYg ^ try{ w
a<C*o URL url = new URL(siteInfoBean.getSSiteURL()); {U '&9_y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %Dls36F httpConnection.setRequestProperty("User-Agent","NetFox"); 2 `h!:0 B;]5,`#! )UZ0gfx int responseCode=httpConnection.getResponseCode(); x5z4Yv^
m if(responseCode>=400) ZV]e- { ,(27p6! processErrorCode(responseCode); ~!-8l&C return -2; //-2 represent access is error >DUE8hp;< } Hq\E06S@ M|#5gKXd Z) i1?# String sHeader; ~1r*/@M[V [F)/mN 62l0
Z- for(int i=1;;i++) |id79qY7g { XQJ^)d00h //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); u%1k //Utility.log(in.readLine()); 8C,utjy sHeader=httpConnection.getHeaderFieldKey(i); ObyuhAR if(sHeader!=null) ho]!G498 { E}' d,v#Z{ if(sHeader.equals("Content-Length")) RvS q KW8 { iQzX-a|4] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T[XP\!z]B! break; \_Kt6= } 9X$#x90 } uWB:"&!^ else T
E&Q6 break; XBQ< } >@^yj+k } PWk?8dL- catch(IOException e){e.printStackTrace ();} *Qg5Z catch(Exception e){e.printStackTrace ();} }K/}(zuy1Y a][pTC\ rb rbK#a)7 Utility.log(nFileLength); Z&]+A, {y&\?'L' mfngbFa1 return nFileLength; _(6B. } g{v5mly xZP >g `\ef0 //保存下载信息(文件指针位置) ,%?; \?b%h private void write_nPos() >' ksXA4b { &,N3uy;Gc try{ 6MQs \ J6. output = new DataOutputStream(new FileOutputStream(tmpFile)); [W9e>Nsp0 output.writeInt(nStartPos.length); Tr+h$M1_Ja for(int i=0;i<nStartPos.length;i++) \,l.p_< { jSie&V@ px // output.writeLong(nPos); Q 7uAf3 output.writeLong(fileSplitterFetch.nStartPos); t +3 output.writeLong(fileSplitterFetch.nEndPos); H~?*KcZ 0\ } `;5VH ]V output.close(); jr,&=C( } Ha)3i{OM catch(IOException e){e.printStackTrace ();} GUu\dl9WA' catch(Exception e){e.printStackTrace ();} I|KY+k> / } ! fi &@k smfG,TI r~$}G-g //读取保存的下载信息(文件指针位置) p}YI#f
in/ private void read_nPos() ( zn_8s { "UQr :/ try{ oLrkOn/aY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); AI1@- int nCount = input.readInt(); $ \Q<K@{ nStartPos = new long[nCount]; ku/\16E/k nEndPos = new long[nCount]; 35Ai;mU' for(int i=0;i<nStartPos.length;i++) .'t (-eT, { Z/2,al\ nStartPos = input.readLong(); Js\-['` nEndPos = input.readLong(); @sc8}"J]# } <|{L[ input.close(); Gw
~{V } w^06z, catch(IOException e){e.printStackTrace ();} .S~@BI(|< catch(Exception e){e.printStackTrace ();} K0tV'Ml#" } Jj2g5={ ;_mgiKHg WGH%92 private void processErrorCode(int nErrorCode) ,>D ja59 { F>(qOH.I System.err.println("Error Code : " + nErrorCode); Mw/?wtW } :PgF fNmE,~ ^oS$>6| //停止文件下载 X AQGG> public void siteStop() PT3>E5`N u { _Zh2eXWdjM bStop = true; 4bP13f for(int i=0;i<nStartPos.length;i++) $Mdbto~ < fileSplitterFetch.splitterStop(); LtC~)R R<"2%oY %tT"`%(+ } %lN2n,AK } !\QeBd+ //负责部分文件的抓取
%b=Y
<v **FileSplitterFetch.java 3(1]FKZtt */ b6 $,Xh package NetFox; h S4.3]ei dZPW2yf !n|#|.0m import java.io.*; EJ1Bq>u7 import java.net.*; >BBl7 ?#d6i$ &|)hCJu public class FileSplitterFetch extends Thread { 4w'lu"U Ve)ClH/DW +wipfL~&S String sURL; //File URL lK0s=4c{ long nStartPos; //File Snippet Start Position @&;(D!_& long nEndPos; //File Snippet End Position NwguP int nThreadID; //Thread's ID *P`v^& boolean bDownOver = false; //Downing is over 2z4<N2!M boolean bStop = false; //Stop identical X:>$8 ^gS FileAccessI fileAccessI = null; //File Access interface "jT#bIm :pRF*^eU cgyp5\*>+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ny)]GvxI { hR-K@fS%l' this.sURL = sURL; $*k)|4 this.nStartPos = nStart; c7\VTYT this.nEndPos = nEnd; GD!-
qH nThreadID = id; #<4--$Xo fileAccessI = new FileAccessI(sName,nStartPos);//定位 /#f^n]v } NetYg]8` Y(_KizBY JBz}|MD public void run() KF+mZB { um7o !yg, while(nStartPos < nEndPos && !bStop) B@ {&< { ^-hEr sK /prYSRn8 C ZJV_0 try{ u^=`%) URL url = new URL(sURL); B8 H75sz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *:g_'K"+ httpConnection.setRequestProperty("User-Agent","NetFox"); PnA?+u2m String sProperty = "bytes="+nStartPos+"-"; 8u>gbdU httpConnection.setRequestProperty("RANGE",sProperty); dy2rkV.z Utility.log(sProperty); =LI:S|[4 R(G\wqHUT3 _1aGtX|W InputStream input = httpConnection.getInputStream(); x0A7O //logResponseHead(httpConnection); /_)l|<k+V IxOc':/jY )1lu=gc byte[] b = new byte[1024]; zC=a3 int nRead; ^
q?1U?4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) je%l dY]/@ { UX2lPgKdLz nStartPos += fileAccessI.write(b,0,nRead); hJf2o //if(nThreadID == 1) E=AVrv5T // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jZd}OC< } n*<v]1 .po>qb6 o_f-GO Utility.log("Thread " + nThreadID + " is over!"); e\F}q)_ bDownOver = true; G>w+#{( //nPos = fileAccessI.write (b,0,nRead); F}36IM9/: } o5!f#Y catch(Exception e){e.printStackTrace ();} hi|! } c7K!cfO:{N } m|O1QM;T ;JT(3yK4>p zXZir7NfM //打印回应的头信息 U%>'" public void logResponseHead(HttpURLConnection con) _Zc4=c,K { O,s. D,S for(int i=1;;i++) P|xG\3@Z { O)]v;9oER String header=con.getHeaderFieldKey(i); Xgat-cy'DA if(header!=null) [/|zH'j: //responseHeaders.put(header,httpConnection.getHeaderField(header)); =sgdkAYwP Utility.log(header+" : "+con.getHeaderField(header)); q/PNJ#< else lr~0pL break; $4m*kQ } $SY]fNJQ } 8Lz]Z
h=ZU B{MaMf) V5p0h~PK public void splitterStop() jVWK0Zba { qf#)lyr<D6 bStop = true; poT&-Ic[ } (=u'sn:s 2eb1lJdS 3<:jx~y> } eSfnB_@x2 Y@uh[aS! )C~9E 5E /* Q@S-f:! **FileAccess.java e,0-)?5R *//文件访问(定位,写) 3n]79+w@z package NetFox; *
F4UAQzYb import java.io.*; nP3 E UvJ;A j:,9%tg public class FileAccessI implements Serializable{ 91Z' Vzg=@A# //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 O_~7Glu RandomAccessFile oSavedFile; Yh<WA>= long nPos; -_N)E ))G ;9a 6pz< ,$lemH1d public FileAccessI() throws IOException i=S~(gp { vB0RKk}d5 this("",0); L] %l51U } `3 cCH uLR<FpM vB'>[jvA| public FileAccessI(String sName,long nPos) throws IOException 6 %Mt { 12UD19! oSavedFile = new RandomAccessFile(sName,"rw"); m Y,|J\w@ this.nPos = nPos; v,@F|c?_S oSavedFile.seek(nPos); ?-)I+EAnE } Na{Y}0=^y >ut" OL9J }baR5v public synchronized int write(byte[] b,int nStart,int nLen) UL$}{2N,_ { j<<3Pr int n = -1; `G9 l try{ 5GzFoy)j> oSavedFile.write(b,nStart,nLen); 3FE( }G n = nLen; zp}eLm:=d } zeb=8Dg
: catch(IOException e) tq1CwzRX { > L2HET e.printStackTrace (); _}xd}QW } I:cg}JZ>| i1lBto[ S$,'Q^~K return n; u\yVR$pQ } w;6bD'.>; Lh.b5Q| M5357Q } NPa\Cg[ co8"sz0(U ').}N z /* tBbOY}.VD **SiteInfoBean.java yw-8#y */ r!1D*v5&: package NetFox; %EbPI)yY3 ~^jq(:d) CNZ z]H public class SiteInfoBean { Q4*?1`IsR ElhRF{R @gC=$A# private String sSiteURL; //Site's URL -VKS~{ private String sFilePath; //Saved File's Path #DU26nCL private String sFileName; //Saved File's Name TfYVw~p_ % private int nSplitter; //Count of Splited Downloading File soA|wk\A )Z 9E=% 8Me:Yp_Xt public SiteInfoBean() PXzsj. {//nSplitter的缺省值为5 |1b_*G4| //default value of nSplitter is 5 yZr M.%V this("","","",5); >{gPN"S"a }
S8[=S Dl(3wgA K_)eWf0a public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) i':ydDOOHA { 58\&/lYW sSiteURL= sURL; XR2~Q)@ sFilePath = sPath; TxjYrzC sFileName = sName; `*", < this.nSplitter = nSpiltter; 6tHO!`}1 M5nWVK7c B~]5$- } Qd}m`YW-f$ )a9 ]US^ DI+]D~N public String getSSiteURL() d@`M
CchCB { JWvjWY2+P return sSiteURL; wN1niR' } |8>3`w! [[PEa-992 poGc a1 public void setSSiteURL(String value) IG)s^bP { ;c~cet4 sSiteURL = value; S#)Eom?V } @k[R/,#'[t F<>!kK/c B~o\+n public String getSFilePath() wW>zgTG { xh7c VE[UM return sFilePath; f` =CpO* } _XJ2fA ) jK \T|vGJa x~xa6 public void setSFilePath(String value) VE+IKj!VG0 { &%})wZ+Dj sFilePath = value; m'P1BLk } l^ZI* z7N /VmR<C?h R\o<7g-| public String getSFileName() yFDv6yJ. { m_?d=o
return sFileName; MZ Aij } R|O8RlH u[nyW3MZ 6qcO?U public void setSFileName(String value) @-UL`+ { .>Ljnk sFileName = value; DXz}YIEC } >:D
j\"o ]|`Cuc *`ZH` V public int getNSplitter() 64hk2a8 { Q+g!V5' return nSplitter; b
Q]/?cCYV } 2M#r] :Ad&$eg+ t#q<n:WeYU public void setNSplitter(int nCount) 9U$EJN_G { ^i:`ZfA# nSplitter = nCount; (aD_zG=k5 } 5:'hj$~|\1 } B}PIRk@a1 K~@Mg1R '1M7M(va /* 0eK*9S] **Utility.java W5SJ^,d)J */ |V<h=D5W package NetFox; 035rPT7-2- v|U(+O ZDbc public class Utility { rn<PR* #1>X58I^ r*Yi1j/ public Utility() }Ho Qwy|& { >JiltF7H0 sQMFpIrr **}h&k&%2 } ,3@#F/c3i~ In`mtn q //线程睡眠 `w]s;G[ public static void sleep(int nSecond) y@\V+ { c%=IL M4 try{ qWmQ-|Py Thread.sleep(nSecond); YW{C} NA } N^3N[lD{ catch(Exception e) Fd0%lnui { P*cNh43U e.printStackTrace (); ;[fw]P n } s`0QA!G{- } rF]h$Z8o qh`t- //日志 \Ym5<];E public static void log(String sMsg) F7Zwh5W { ,_Z+8 System.err.println(sMsg); j?MAED } By% =W5 3-&QRR#p Q=]w !I\ public static void log(int sMsg) !Y-98<|b
M { |+T1XYG5 System.err.println(sMsg); ztw@Y|<2 } V O3x~E } z<yU-m2h q5?# 3 T= JU4qzi /* ^k]XEW{PG **TestMethod.java l8?>>.<P= */ 2 $Tj84'X package NetFox; #5f-`~^C{ M@5?ZZ4L f"<O0Qw public class TestMethod { xP [n ONe# rKJ_ ^k9kJ+x^S2 public TestMethod() K"r*M.P> { ///xx/weblogic60b2_win.exe X-wf:h?i try{ ?]*^xL;x? SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); kkQVNphc //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }I
:OsAw SiteFileFetch fileFetch = new SiteFileFetch(bean); XHK70: i fileFetch.start(); ^/r7@: } m@^1JlH catch(Exception e){e.printStackTrace ();} -?0qf,W. yxH ( c ?Orxmxc
2 } t2lS
~l) RO.k]x6 Bro9YP4< public static void main(String[] args) B&@?*^. { oZAB _A)[- new TestMethod(); 9^j &VmF } !P-^O } IP(Vr7-v 点击下载更多相关资料
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