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/* oZL# *Z(h **SiteFileFetch.java }Q^*Zq9- */ "2tKh!?Q package NetFox; pI_:3D
xe import java.io.*; XKOPW/ import java.net.*; &tiJ=;R1 Y!ypG- [s]
ZT public class SiteFileFetch extends Thread { s|[qq7 qd'Z|'j ts,V+cEA SiteInfoBean siteInfoBean = null; //文件信息Bean VHLNJnA long[] nStartPos; //开始位置 Hh&qjf long[] nEndPos; //结束位置 O sy_C<O FileSplitterFetch[] fileSplitterFetch; //子线程对象 JPZH%#E( long nFileLength; //文件长度 ra@CouR^c{ boolean bFirst = true; //是否第一次取文件 B oiS boolean bStop = false; //停止标志 CLuQ=-[| File tmpFile; //文件下载的临时信息 8RVRfy,w DataOutputStream output; //输出到文件的输出流 #B!M,TWf9s 5CfD/}{:#I //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) aM_O0Rn== public SiteFileFetch(SiteInfoBean bean) throws IOException ^ME'D { 3".#nN siteInfoBean = bean; d\c)cgh% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]T.+(\I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Zv8GrkK if(tmpFile.exists ()) ]{t!J^Xn { Oe "%v;- bFirst = false; 4`o<e)c3 read_nPos(); >$a;+v
} g<$2#c} else I;UT;/E2 { AW!A+?F6 nStartPos = new long[bean.getNSplitter()]; iG=Di)O nEndPos = new long[bean.getNSplitter()]; ;R@D } {lppv(U Bob-qCBV >4+KEK r{*BJi.b } pWH,nn?w. |GP&!] t4hc X[ public void run() `9T5Dem|# { Cm"S=gV //获得文件长度 LEX @hkh //分割文件 f'M([gn^_ //实例FileSplitterFetch 43O5|8o //启动FileSplitterFetch线程 2,|;qFJY-@ //等待子线程返回 ID{XZ try{ Tgbq4xR( if(bFirst) =NNxe"Kd;U { &zP>pQr`# nFileLength = getFileSize(); %E [HMq<H if(nFileLength == -1) U: )Gc { q_9 tbZ; System.err.println("File Length is not known!"); NQvI=R-g } 9E[==2TO else if(nFileLength == -2) 4_$.gO { K7nyQGS System.err.println("File is not access!"); xZ>j Q_} } <zAYq=IU else n@q-f-2 { }O| 9Qb for(int i=0;i<nStartPos.length;i++) <jM
{ <8- { M0KU}h nStartPos = (long)(i*(nFileLength/nStartPos.length)); MhB>bnWXR } #k)t.P
Q for(int i=0;i<nEndPos.length-1;i++) ;&O *KhLH { [r'A8!/|[ nEndPos = nStartPos[i+1]; ki1j~q } Cbm^:
_LR nEndPos[nEndPos.length-1] = nFileLength; GY^;$ ? } H4sc7- } 1<*U:W
$g }WBHuVcZG ~_g{P3 //启动子线程 hMV>5Y[s fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +F2X2e)g" for(int i=0;i<nStartPos.length;i++) |y+_BZ5 { 6}|h fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j"VDqDDz siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), "{Y6.)x nStartPos,nEndPos,i); S.<4t*, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j5]ul!ji fileSplitterFetch.start(); Y4_xV& } l/\D0\x2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'G>9 iw siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \wK4bvUrX // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", VYt<j<ba nEndPos = " + nFileLength); 3=*ur( Qy // fileSplitterFetch[nPos.length-1].start(); |>.</68Z
`46.! t`>Z#=cl\ //等待子线程结束 j0(jXAc;UB //int count = 0; J(wFJg\/ //是否结束while循环 %&q}5Y4! boolean breakWhile = false; -~X[j2 6E9/z XP?)xDr8 while(!bStop) )OVa7[-T { (XY`1|])` write_nPos(); ErQ6a%~, Utility.sleep(500); UP%6s:>: breakWhile = true; hhFO, >7S@3,C3ke 5K)_w:U
X for(int i=0;i<nStartPos.length;i++) *-{|m1P { (mKH,r if(!fileSplitterFetch.bDownOver) *;~u 5y2b { ;-;lM6zP breakWhile = false; Z&P\}mm break; g2=PZR$ } ts=:r } 49c-`[d
L if(breakWhile) Vo6g /h?` break; y\Utm$)j ()F{kM8 #N'9
w . //count++; .aVt d
[ //if(count>4) 3dolrW // siteStop(); K>b4(^lf } G#^0Bh& X8N9*vy I3d}DpPx% System.err.println("文件下载结束!"); $$"G1<EZ } +%u3% } catch(Exception e){e.printStackTrace ();} p8?v
o?^ } ecR)8^1 ' Hrph>v #.$y //获得文件长度 R^P>yk8 public long getFileSize() RVLVY:h|F { A^A)arJS int nFileLength = -1; '3WtpsKA try{ ^w2 HF URL url = new URL(siteInfoBean.getSSiteURL());
KLE)+| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); sowwXrECg@ httpConnection.setRequestProperty("User-Agent","NetFox"); qMA-# 22U`1AD3U S6a\KtVa int responseCode=httpConnection.getResponseCode(); 5,g +OY=\ if(responseCode>=400) v\@RwtP { FF!PmfF' processErrorCode(responseCode); ela^L_N hF return -2; //-2 represent access is error <c:H u{D } evYn} o)^Wz jX(hBnGW String sHeader; ( }Bb=~ GQ>0E 2Q5 @2jT for(int i=1;;i++) Hbd>sS { z ynu0X //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); AX<f$%iqD //Utility.log(in.readLine()); Y0A(-" sHeader=httpConnection.getHeaderFieldKey(i); +@?'dw if(sHeader!=null) uLWu. Vx { hpPacN if(sHeader.equals("Content-Length")) y$SUYG'v { hh&$xlO)(v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o ]z#~^w break; 2zW IB[ } nPqpat`E } aekke//y else *kg->J break; ?+^p$'5 } p'1/J:EnV } M*kE |q/K catch(IOException e){e.printStackTrace ();} v^8sL` F catch(Exception e){e.printStackTrace ();} UeLO `Ug0; +>K&zS i/1$uQ Utility.log(nFileLength); ]a4+] vLK yNP4Ey nReld
:#T return nFileLength; ?_Z-}f } RLB"}&SF] 'xGhMgR; *Q/^ib9= //保存下载信息(文件指针位置) o5NmNOXm private void write_nPos() ^jwzCo- { t'@mUX:-A try{ G2)F<Y output = new DataOutputStream(new FileOutputStream(tmpFile)); }X^MB output.writeInt(nStartPos.length); ,aC}0t for(int i=0;i<nStartPos.length;i++) 3Z=yCec] { }6/M5zF3 // output.writeLong(nPos); H>+])~# output.writeLong(fileSplitterFetch.nStartPos); P=jsOuW output.writeLong(fileSplitterFetch.nEndPos); 4Z~ nWs } -bzlp7q* output.close(); V3q`V/\ } >19s:+ catch(IOException e){e.printStackTrace ();} \\#D!q* catch(Exception e){e.printStackTrace ();} UGy3B) } to</ 3?]81v/ h%ys::\zF //读取保存的下载信息(文件指针位置)
Y6VJr+Ap( private void read_nPos() A#T"4'#?< { PENB5+1OK try{ M-Efe_VRQc DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L%is"NZh int nCount = input.readInt(); d$3md<lIB nStartPos = new long[nCount]; 8X"4RyNSn nEndPos = new long[nCount]; cOX )+53 for(int i=0;i<nStartPos.length;i++) pF-_yyQ { sIgTSdk nStartPos = input.readLong(); ]B=*p0~j^n nEndPos = input.readLong(); fJc( } u@ #%SX input.close(); f(D'qV T{ } uH%b rbrU catch(IOException e){e.printStackTrace ();} RBn/7 catch(Exception e){e.printStackTrace ();}
h]ae^M } L,y
q=%h| (4/"uj5 $Z#~wsw private void processErrorCode(int nErrorCode) *u"%hXR { 8:V,>PH System.err.println("Error Code : " + nErrorCode); nsU7cLf"^V } m[v0mXE klT?h[I! `D~oY= //停止文件下载 f^B8!EY#: public void siteStop()
*af\U3kx { M=pQx$%a bStop = true; uhfK\.3 for(int i=0;i<nStartPos.length;i++) {\`ttc> fileSplitterFetch.splitterStop(); c-XO}\? >j hcSvM6 E4892B:` } ?96r7C| } ~&D
=;M/ //负责部分文件的抓取 E2>{se Z **FileSplitterFetch.java K9%rr_ja! */ )2?]c package NetFox; zMbFh_dcq w!6{{m E0+L?(; import java.io.*; mB_?N $K import java.net.*; B+Qf?1f ;QXg*GNAv$ :5%98V>02 public class FileSplitterFetch extends Thread { #C&';HB;y s_NY#MPz[ Q^2dZXk~ String sURL; //File URL '2lzMc>wvP long nStartPos; //File Snippet Start Position 9m$"B*&6G
long nEndPos; //File Snippet End Position V4V`0I int nThreadID; //Thread's ID -^m?%_<50l boolean bDownOver = false; //Downing is over 6)uBUM;i boolean bStop = false; //Stop identical 5tbCx!tL FileAccessI fileAccessI = null; //File Access interface 0q"4\#4l `KA==;0 *mp:#' public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k}fC58q { Tty'ysH this.sURL = sURL; yO)xN=o^\ this.nStartPos = nStart; )
~=pt&+ this.nEndPos = nEnd; B1 }-
nThreadID = id; \{ EVRRXn fileAccessI = new FileAccessI(sName,nStartPos);//定位 gPk,nB } :k1?I'q% -#f.}H' )v_Wn[Y.H public void run() T"vf { 7wx=# while(nStartPos < nEndPos && !bStop) cmXbkM { VU,G.eLW $TXiWW+ |hika`35K try{ l}L81t7f URL url = new URL(sURL); aH1CX<3)~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DfAF-Yhut httpConnection.setRequestProperty("User-Agent","NetFox"); gxVr1DIkN String sProperty = "bytes="+nStartPos+"-"; $uTrM8 httpConnection.setRequestProperty("RANGE",sProperty); zb9G&'7 Utility.log(sProperty); '9f0UtT|[ JyE-c}I 62R";# K InputStream input = httpConnection.getInputStream(); ,:(s=JN+ //logResponseHead(httpConnection); C;m"W5+ ZEI)U,
I. C5dM`_3L byte[] b = new byte[1024]; c%pf,sm' int nRead; E42)93~C while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) rt*x[5< { 88_ef7w nStartPos += fileAccessI.write(b,0,nRead); b:F;6X0~Hl //if(nThreadID == 1) PEvY3F}_rh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +S4>}2N33 } tI{]&dev Uyb0iQ-,s rq3f/_#L!O Utility.log("Thread " + nThreadID + " is over!"); `YqtI/-w bDownOver = true; 6o#/[Tz //nPos = fileAccessI.write (b,0,nRead); {OPEW`F } Qa=Y?=Za catch(Exception e){e.printStackTrace ();} PSq?8. } /";tkad^ } p}!i_P ASbIc"S6 DW7E ]o
//打印回应的头信息 h s',f public void logResponseHead(HttpURLConnection con) Zu|NF
uFI { J;_4
3eS for(int i=1;;i++) AA=Ob$2$ { D^@@ P String header=con.getHeaderFieldKey(i); D{B?2}X if(header!=null) gEk;Tj //responseHeaders.put(header,httpConnection.getHeaderField(header)); c@[Trk m Utility.log(header+" : "+con.getHeaderField(header)); Bz } nP9 else G7&TMg7i break; DK?aFSf\ } (o|bst][S } 2@tnOs(* 9k;,WU(K< aU(.LC public void splitterStop() o C|oh { gJ|#xZ bStop = true; %.=}v7&<z } !lfE7|\p Vpg>K #w t~ {O)tt } i,;JI>U qa^cJ1@ Kc\8GkdB /* 0L/chP **FileAccess.java LnE/62){N *//文件访问(定位,写) ,7@\e&/& package NetFox; X,w X)9]J import java.io.*; }BC%(ZH6 *w@1@6?j f9K7^qwkiz public class FileAccessI implements Serializable{ tNFw1& 8B*(P> //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _$AM=?P& RandomAccessFile oSavedFile; q{&c?l*2 long nPos; A*DN/lG D-{*3?x g PCf+>X{ public FileAccessI() throws IOException aC}\`.Kb { jr)M], this("",0); ppz3"5 } %l!A%fn( 'EIe5Op ra'/~^9 public FileAccessI(String sName,long nPos) throws IOException 23r(4 { Ni>Ns=n oSavedFile = new RandomAccessFile(sName,"rw"); 'zm5wqrkAd this.nPos = nPos; }MOXJb @ oSavedFile.seek(nPos); op`9(=DJ] } %}TJr]'F "B:FSWM_- [Ep'm public synchronized int write(byte[] b,int nStart,int nLen) rEWJ3*Hb { lkT :e)w int n = -1; {*+J`H_G2a try{ zn-=mk;W oSavedFile.write(b,nStart,nLen); ~NIhS! n = nLen; CqEbQ>? } GPLop/6
catch(IOException e) d\>XfS { 01o<eZ, e.printStackTrace (); OD~Q|I(j } t4UK~ {gh HY5R }o:LwxNO return n; `W1uU=c } KMi$0+ GwF8ze+cH $[A^8[// } s]99'Q", .9x*YS ZX&e,X~V /* pZS]i
" **SiteInfoBean.java ^|Z'}p|& */ a&JY x package NetFox; dUa>XkPa\2 /g>-s&w y%vAEQ2j= public class SiteInfoBean { `0ym3} (O !T<,fR+8X @@*x/"GJG private String sSiteURL; //Site's URL E\D,=|Mul private String sFilePath; //Saved File's Path Zo2+{a private String sFileName; //Saved File's Name H4`>B>\ private int nSplitter; //Count of Splited Downloading File \Ebh6SRp\ b|AjB: G wzy[sB274 public SiteInfoBean() J#C4A]A {//nSplitter的缺省值为5 @}6<,;|DQ //default value of nSplitter is 5 H,TApF89A this("","","",5); "=DQ { (L } WwsNAJ 1f+A_k/@ ;O)*!yA(GG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) e^N~)Nlj { kAp#6->(q sSiteURL= sURL; v CsE|eMP sFilePath = sPath; JfkEJk< sFileName = sName; ~9o@1TO:v this.nSplitter = nSpiltter; :2xGfy?? i45.2, \\ItN } *
;sz/. g5+m]3#t +i}H $.
public String getSSiteURL() e~
OrZhJ=_ { fLs>|Rh return sSiteURL; (5]
[L<L } I N3-ZNx }^$#vJ(a7K K@e2%hk9x public void setSSiteURL(String value) HYO/]\al { .X3n9] sSiteURL = value; =_=%1rI~ } !EKt$8W axmq/8X l4T[x|')M public String getSFilePath() 1v:Ql\^cT { 4I&(>9 @z< return sFilePath; YSxr(\~j } 8 !:2: &i3SB[| G HQ~{ public void setSFilePath(String value) QaLaw-lx { >x%HqP#_V sFilePath = value; _YlyS )#@ } {i=V:$_# \y271}' #f(tzPD public String getSFileName() T\Xf0|y { #xx.yn(7 return sFileName; T\.~!Q } V?yQm4 MPnMLUB$\ *PlKl_nP6 public void setSFileName(String value) :j~4mb?$ { ;g8v7>p sFileName = value; 6I(Y<LZ5 } KW'nW >!Y#2]@}o ^7>~y( public int getNSplitter() x(sKkm`Q { 00IW9B- return nSplitter; PdVY tK% } f%n ;Z}= ;\}dQsX }>AA[ba"' public void setNSplitter(int nCount) |8{ k,!P'K { v(0ujfSR0 nSplitter = nCount; ]6^S:K_" } :I"22EH } ?99r>01> [bKc5qp @?J7=}bzz /* .!^OmT,u **Utility.java %n6<6t`$ */ @VHstjos^V package NetFox; 0VQBm^$( NApy(e5% IHCxM|/k(M public class Utility { LtwfL^ # 88:YU4:l`N *ze/$vz- public Utility() 8(-
29 { d]K8*a%[- ,Gbc4x Ha]vG@?+ } 416}# Mk #k/T\PQ0s //线程睡眠 }LS.bQKqi, public static void sleep(int nSecond) ?`Mk$Y%my { }vx
4 6 try{ /ho7~C+H*e Thread.sleep(nSecond); #X``^
} 7gOu|t catch(Exception e) 1Hhr6T^) { 6yUThv.G# e.printStackTrace (); %j@/Tx/ } Y5ei:r|^ } hFtjw6 <#"_Qgdix //日志 (gE<`b public static void log(String sMsg) 6b2h\+AP { !S7?:MJ?p\ System.err.println(sMsg); Z$c&Y>@) } *C|*{! 90F.9rh /Dc54Un public static void log(int sMsg) ?HOnDw.v1 { U7/
=|Z System.err.println(sMsg); SR.xI:}4 } G3!O@j!7w$ } D|$0~1y ;H8`^; K&{ _s /* Lwm /[ **TestMethod.java !]7b31$M_ */ jp}.W package NetFox; ldU ><xc2 =^ Ws/k (7,Q4T public class TestMethod { c3rj
:QK6I opn6 C ) wNl6a9# public TestMethod() "g"%7jK { ///xx/weblogic60b2_win.exe /_expSPHl try{ v`'Iew } SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h(~of( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 4/\Ynb.L SiteFileFetch fileFetch = new SiteFileFetch(bean); }h/7M fileFetch.start(); Ap"%%D^{: } Q;y4yJ$wI catch(Exception e){e.printStackTrace ();} 5>e<|@2
X YsiH=x vKPLh } %RwWyzm#\ ow`F 7 9T$%^H9 public static void main(String[] args) &.yX41R { c;t3I}, new TestMethod(); Q9p7{^m&E } {@x-T } WHjJR 点击下载更多相关资料
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