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/* TH YVT%v **SiteFileFetch.java FZH-q!"^cK */ xb]odYGdW package NetFox; H@Q` import java.io.*; Hxn<(gd
G import java.net.*; z|Ap\[GS LZ4xfB( `/0u{[
public class SiteFileFetch extends Thread { 4QO/ff[ o SD^E7W$? JCNk\@0i* SiteInfoBean siteInfoBean = null; //文件信息Bean e$32 long[] nStartPos; //开始位置 /h7.oD8CU long[] nEndPos; //结束位置 'u1=XX
h FileSplitterFetch[] fileSplitterFetch; //子线程对象 )d:K:YXt long nFileLength; //文件长度 8<{;=m8cQ boolean bFirst = true; //是否第一次取文件 XddHP;x boolean bStop = false; //停止标志 BKX9SL] File tmpFile; //文件下载的临时信息 Fe5jdV< DataOutputStream output; //输出到文件的输出流 %Lyz_2q A x~z_,': //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) [g`, AmR\! public SiteFileFetch(SiteInfoBean bean) throws IOException %Ci^*zb { L{<7.?{Y siteInfoBean = bean; E23w *'] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 2kVp_=c tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); rw]yKH if(tmpFile.exists ()) +aj^Cs1$ { P.h.MA] bFirst = false; uOre,AQR read_nPos(); @701S(0'7 } R:f7LRF/\ else ULIFSd Y { :/i~y $t nStartPos = new long[bean.getNSplitter()]; ~z`/9; nEndPos = new long[bean.getNSplitter()]; LN\[Tmd & } P5Dk63z] 2uL9.q 'W(xgOP1 x9~[HuJ } ;_N"Fdl hlC%HA h R~v public void run() Cg3ODfe { $_FZn'Db6 //获得文件长度 jtCZfFD? //分割文件 s/h7G}Mu //实例FileSplitterFetch YZ**;"<G //启动FileSplitterFetch线程 X4'kZ'Sy< //等待子线程返回 b2s~%}T try{ "H?QqrKx if(bFirst) I="oxf#q { cgN>3cE nFileLength = getFileSize(); :<%vE !$ if(nFileLength == -1) S=PJhAF { ;UpJ=?W System.err.println("File Length is not known!"); 8lb-}= } ESv:1o`?n else if(nFileLength == -2) > 0T
Za { Q;wB{vr$ System.err.println("File is not access!"); t!t=|JNf{ } )$_,?*fq: else ^/a*.cu { uw"*zBxl for(int i=0;i<nStartPos.length;i++) !.-.#<<_a { GO~k ' nStartPos = (long)(i*(nFileLength/nStartPos.length)); Q1T@oxV } A?,A(-0C for(int i=0;i<nEndPos.length-1;i++) O,irpQ { IT&i,`cJ~F nEndPos = nStartPos[i+1]; 6p m~sD } +NR n0
z( nEndPos[nEndPos.length-1] = nFileLength; =<.F3lo\s } ]EN&S Wh } uA%Ts*aN t7^D-l u]bz42] //启动子线程 sUciFAb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; iaRR5D- for(int i=0;i<nStartPos.length;i++) L[]BzsIv { VYigxhP7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |X 3">U +- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), mPG7Zy$z nStartPos,nEndPos,i); ls @5^g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I4~^TrznRa fileSplitterFetch.start(); ?!7
SzLll } !
Rvn'|! // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <\ETPL,< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5#!ogKQ(i // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", r0Z+RB^I nEndPos = " + nFileLength); Ux_<d?p // fileSplitterFetch[nPos.length-1].start(); L|J~9FM SUu >6'LN MA6P"? //等待子线程结束 [+gzdLad //int count = 0; rS,j;8D- //是否结束while循环 ]1}h8/ boolean breakWhile = false; t'aSF{% H"D5e L#ZLawG while(!bStop)
,CKvTxz0 { c'rd $ write_nPos(); ytz8=\p_b Utility.sleep(500); $T/#1w P breakWhile = true; }4vjKSV #>bT< T.2ZBG~|[ for(int i=0;i<nStartPos.length;i++) y\Dn^ { @'gl~J7 if(!fileSplitterFetch.bDownOver) e?=elN { "Z~`e]> breakWhile = false; v:A:37#I break; [TEcg^ } LU(%K{9 } 8f-:d] if(breakWhile) j6og3.H- break; Y}/c
N\ @'HT;Q!\Vd IfB/O.;Kz //count++; uS-3\$ //if(count>4) x<
S\D& // siteStop(); NQR^%<hU } N]u2ql& K7Gm-=% e`AUYli" System.err.println("文件下载结束!"); Yw[{beo } }!=U^A) catch(Exception e){e.printStackTrace ();} 3SFg# } >fbo
r'| M8zE3;5 _NT[
~M_Q //获得文件长度 K%PxA#P} public long getFileSize() ]?#
#))RUS { EZ{/]gCK int nFileLength = -1; 7t3X`db try{ | lE-&a$xd URL url = new URL(siteInfoBean.getSSiteURL()); VWD.J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bKByU{t httpConnection.setRequestProperty("User-Agent","NetFox"); )2]a8JVf Gql`>~ ]< +3Vw int responseCode=httpConnection.getResponseCode(); 9N1#V
K if(responseCode>=400) (Xj.iP { 8H_l[/ processErrorCode(responseCode); @`Wt4< return -2; //-2 represent access is error ,02w@we5 } 6J"(xT %Gu][_.L f,JX" String sHeader; C/y(E|zC$ (FG^UA#' Y-= /,
for(int i=1;;i++) ;.AV;C" { egWx9xX //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); `{<JC{yc? //Utility.log(in.readLine()); D!/0c]" sHeader=httpConnection.getHeaderFieldKey(i); sNf
+ lga0 if(sHeader!=null) @sdS0pC {
aH if(sHeader.equals("Content-Length")) ^ `je { ?y46o2b*) nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1xIFvXru break; ~hzEKvs } Wxc^_iqA1 } ,0h3x$l) else La]4/=a break; $Ba`VGP>)3 } +xq=<jy } ,$ mLL catch(IOException e){e.printStackTrace ();} ^1Yo-T(R catch(Exception e){e.printStackTrace ();} :cb[M5c 4]]b1^vVj fSr`>UpxC Utility.log(nFileLength); aTX]+tBoe }I)z7l. *.xZfi_| return nFileLength; VT
Vm7l } x~nQm]@`h m3B\)2B TRo4I{L6S //保存下载信息(文件指针位置) zaBG= private void write_nPos() P.!;Uf}32 { xp(mB7;: try{ K: 4P;ApI output = new DataOutputStream(new FileOutputStream(tmpFile)); OK.-]()! output.writeInt(nStartPos.length); K# /Ch5? for(int i=0;i<nStartPos.length;i++) {aT92-D3 {
+*<K"H|, // output.writeLong(nPos); !}y8S'Yjw output.writeLong(fileSplitterFetch.nStartPos); sC9-+} output.writeLong(fileSplitterFetch.nEndPos); YyG~#6aCh } _m" ^lo output.close(); 1BTgGF } |KTpK(6p catch(IOException e){e.printStackTrace ();} (5>{?dR)| catch(Exception e){e.printStackTrace ();} B
JU*`Tx } tjt=N\; UJ
O]sD`i xTGP //读取保存的下载信息(文件指针位置) !\3}R25 private void read_nPos() 1O|RIv7F[/ { J tThkh'-" try{ 7G?Ia%u DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <
rv1IJ int nCount = input.readInt(); Pb*q;9 nStartPos = new long[nCount]; bU:V%B?=] nEndPos = new long[nCount]; t]gq+ c Lo for(int i=0;i<nStartPos.length;i++) Ja^7$WY { {jrZ?e-q nStartPos = input.readLong(); ^Kb9@lz/ nEndPos = input.readLong(); 5f/@:~ } C:WtCAm( input.close(); \YjB+[. } >t2]Ssi( catch(IOException e){e.printStackTrace ();} "9TxK6 catch(Exception e){e.printStackTrace ();} PXOq# } t%0r"bTi aB/{ %%o yLV2>kq private void processErrorCode(int nErrorCode) nLzX
Z6JlU { b/T20F{W\o System.err.println("Error Code : " + nErrorCode); ~+7a d$ }
h4J{j h. Vi Cg|1c tU8g(ep,o //停止文件下载 2O}s*C$Xav public void siteStop() }G"r3*
{ 41P4?"O bStop = true; i528e{& for(int i=0;i<nStartPos.length;i++) p,3go[9X:R fileSplitterFetch.splitterStop(); ^yzo!`)fso fRZUY<t 2&zn^\%" } oHYD_8'f } azz#@f1 //负责部分文件的抓取 CpBQ>!CW **FileSplitterFetch.java COxZ
Q */ IM l9\U package NetFox; xCDA1y;j 2@"0}po# HV#?6,U} import java.io.*; 03i?"MvNo import java.net.*; (cPeee%Q ;'b!7sMO~ U*` public class FileSplitterFetch extends Thread { 9Bbm7Gd mcAH1k e
4\ uZKv@, String sURL; //File URL $1Q3Y'Q9 long nStartPos; //File Snippet Start Position )]0[`iLe long nEndPos; //File Snippet End Position 'l0eo' K int nThreadID; //Thread's ID -eSPoZ boolean bDownOver = false; //Downing is over H|UV+Q0, boolean bStop = false; //Stop identical e+d6R[`M FileAccessI fileAccessI = null; //File Access interface ~T;ajvJ Zu [?' u"Hd55"& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Y_|K,T6Zj@ { "63zc1 this.sURL = sURL; 2V=FWuXC" this.nStartPos = nStart; j?Jd@(*y$ this.nEndPos = nEnd; s)`1Rf nThreadID = id; .MzP}8^ fileAccessI = new FileAccessI(sName,nStartPos);//定位 p;c_<>ws-Y } ],fwZd[t @+T{M:&l 3;-@<9 public void run() h[[/p {z { %$9)1"T0Y while(nStartPos < nEndPos && !bStop) {Vt^Xc { K{r1&O>W 6qHvq
A, %0y3 /W try{ x1 &b@u URL url = new URL(sURL); ]Gi+Z1q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !Xv2PdP httpConnection.setRequestProperty("User-Agent","NetFox"); 6\S$I5 String sProperty = "bytes="+nStartPos+"-"; ]<o.aMdV httpConnection.setRequestProperty("RANGE",sProperty); j4
& Utility.log(sProperty); t3yQ/ 4E>/*F! kVG6\<c] InputStream input = httpConnection.getInputStream(); "k_n+cH% //logResponseHead(httpConnection); EU&3Pdnd DbNi;m 71n uTE%! byte[] b = new byte[1024]; O>"r. sR int nRead; lJz?QI1 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) e$xv[9 { *F%ol;|Q nStartPos += fileAccessI.write(b,0,nRead); uYFcq //if(nThreadID == 1) t$PnQ@xu // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >I8hFtAM } UV
*tO15i E't G5,/m %]:vT&M Utility.log("Thread " + nThreadID + " is over!"); ;P0Y6v3 bDownOver = true; =ZJ?xA8 //nPos = fileAccessI.write (b,0,nRead); g ]PLW3 } 2I(@aB+ catch(Exception e){e.printStackTrace ();} lh(+X-}D } Cak/#1 } (a)@<RF`Q} as\K(c9 V]S06>P //打印回应的头信息 >"$-V Y6 i public void logResponseHead(HttpURLConnection con) !k??Kj { B+q+)O+ for(int i=1;;i++) '14l )1g. { ;x0 KaFk String header=con.getHeaderFieldKey(i); +n.j.JP"X if(header!=null) VL!kX``^F //responseHeaders.put(header,httpConnection.getHeaderField(header)); d(B;vL@R2V Utility.log(header+" : "+con.getHeaderField(header)); !L.z4n,n+ else t-|=weNy break; *y\tns U } bHH}x"d[x } .2 SIU4[P fdEj#Ux<H wqoN@d public void splitterStop() /a/uS3& { yar IR| bStop = true; }lvP|6Y: y } _itN.^ )Jjw}}$}Y xXh]z| } z^GGJu%vjr (i~%4w= :Y?08/V /* *l8vCa9Y **FileAccess.java JI; i1@|b *//文件访问(定位,写) ?*5l}y= package NetFox; OZ]3OL, import java.io.*; s#Y7*?Sm T-cVM>u\D l:C0:m% public class FileAccessI implements Serializable{ 2{tJ'3 W p*
v Vv //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 (#Kvm RandomAccessFile oSavedFile; aj-uk(r long nPos; iQR})=Q Fi=8B&j b,V=B{(~ public FileAccessI() throws IOException &T.P7nJ= { T`DlOi]Z_ this("",0); -Z&{$J } p2?+[d ]6 7wk lMf5F8 public FileAccessI(String sName,long nPos) throws IOException 'WgwLE_ { vPq\reKe oSavedFile = new RandomAccessFile(sName,"rw"); ] ]-0RJ=S? this.nPos = nPos; z4UQ:z@ oSavedFile.seek(nPos); qq{N; C } P@![P Ij kqB00
; {v'Fg public synchronized int write(byte[] b,int nStart,int nLen) 8LKZ3Y| { ;lt;]7 int n = -1; VDN]P3 try{ } dlNMW oSavedFile.write(b,nStart,nLen); cO+`8`kv n = nLen; bW3o%srxa } vw
2@}#\: catch(IOException e) DKCy h` { 6>A8#VT e.printStackTrace (); /;ITnG } a'~y'6 mMWNUkDq GlZDuU return n; kniMXeiu } #8|NZ6x, l.)!jWY )gF9D1eA } r!uAofIi_ FvP1;E ;OyM~T gI /* 0:8'Ov( **SiteInfoBean.java %>z}P&Yz */ p}z0(lQ*~ package NetFox; Pl6=._
s[bKGn@ R[t[M}q public class SiteInfoBean { ?[">%^ u] b6> 3!x)LUWfWY private String sSiteURL; //Site's URL "de:plMofy private String sFilePath; //Saved File's Path ?H?r!MZ% private String sFileName; //Saved File's Name eu;^h3u;b private int nSplitter; //Count of Splited Downloading File `#bcoK5 WGn1pW ZC-N4ESr public SiteInfoBean() w6 .HvH-@? {//nSplitter的缺省值为5 7h~M&\M //default value of nSplitter is 5 yhmW-#+^e this("","","",5); &jcr7{cD } ZAwl,N){ k,& QcYw 2F(j=uV+ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Mt`.|N;y! { |/$#G0X;H sSiteURL= sURL; ?K"]XXsI sFilePath = sPath; E*vi@aI sFileName = sName; ^;d;b< this.nSplitter = nSpiltter; 5KzU&!Zh9 S;~_9i]upe COafVlJ,l } W0k_"uI B7;MY6h# ,*30Q public String getSSiteURL() "( xu { c9@* return sSiteURL; z,WrLZC } <:w7^m A@ +.[[ q I}Zg)q] public void setSSiteURL(String value) joq
;N]S { 6._):[_2 sSiteURL = value; 2Xosj(H } )XFMlSx) u CXd%
CzE :([,vO: public String getSFilePath() Lfor0-j { eYFCf; return sFilePath; KH-.Z0
2U } W+vm!7wX0 Z:}^fZP a%kj)ah public void setSFilePath(String value) <[Vr(.A { 8}&cE#@ sFilePath = value; h!MT5B)r. } `?:'_Ki -Ac^#/[0 tB[K4GNSQ public String getSFileName() r*Mm5QozA { iZUBw return sFileName; ]TQjk{X< } =vWnqF: DE[y&]/C{ u^uW<.#z public void setSFileName(String value) *m7e>]- { /Wa+mp sFileName = value; W $y?~2 } WJ%b9{< WrV|<%EQh *oF{ R^ public int getNSplitter() !vU[V,~
{ |:AjQ&PM) return nSplitter; 0Bll6Rd } (mzyA%;W ]b[3 th* 87-oR}/r public void setNSplitter(int nCount) 90q*V%cS { !U91 nSplitter = nCount; yO !*pC } tlW}lN} } ALG + vK$W)(Z Fax73vl|^a /* %c&h:7); **Utility.java aW"BN 5eM> */ }5A?WH_ package NetFox; hfY2pG9N B%,0zb+-L <fP|<>s$@1 public class Utility { R_-.:n%.z {P*RA'H3G O)hNHIF public Utility() v"^G9u { U+\\#5$ :/u
EPki S -im
o } /u?^s "C/ ?O28Q DUI //线程睡眠 |kjk{ public static void sleep(int nSecond) }^=J] { M]oaWQu try{ F&ux9zP Thread.sleep(nSecond); ,Q^.SHP8 } IF<jq\M catch(Exception e) w'}b 8m(L { 5Ba eHzI e.printStackTrace (); D&.+Dx^G } 0PZpE
"$X } emTqbO 6<gh:vj //日志 9OX&;O+5 public static void log(String sMsg) X'O3)Yg { KZ&{Ya System.err.println(sMsg); V4_ZBeWA } WxFVbtw +dlN^P647 iOw'NxmY public static void log(int sMsg) Zhf+u
r { "HlT-0F System.err.println(sMsg); 0ZTT^2R } 7V?TLGgd$ } wgY:W:y'N jruwdm^ SIVzc Hm /* \Gg6&:Ua **TestMethod.java [8[g_ */ `C$. package NetFox; M/T
ll]\| Kx7s
d i r761vtC# public class TestMethod { C`Zz\DNG@ "|`euxYV '_>8_ public TestMethod() 741Sd8 { ///xx/weblogic60b2_win.exe wX[g\,?}' try{ 3,t3\`= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ^z)p@sk# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .]24V!J(1w SiteFileFetch fileFetch = new SiteFileFetch(bean); DgW*Br8< fileFetch.start(); m5`<XwD9 } ^\KZE|^3@ catch(Exception e){e.printStackTrace ();} o !bV;] ^zn&"@ jnho*,X } $b OiP b@`h]]~: it77x3Mm
F public static void main(String[] args) opqY@>Vh& { ebfT%_N new TestMethod(); ZOw%Fw4B } ~>SqJ&-moo } d;@"Naw 点击下载更多相关资料
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