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/* \?Xoa"^ **SiteFileFetch.java k%sxA */ I^n,v )
8 package NetFox; #
eFdu import java.io.*; "?iyvzo import java.net.*; F]<2nb7 Ut/%+r"s 8y[Rwa public class SiteFileFetch extends Thread { ?y"M># R S>qP;V*- !N][W#: SiteInfoBean siteInfoBean = null; //文件信息Bean k3Puq1H long[] nStartPos; //开始位置 {z;K0 long[] nEndPos; //结束位置 f1U8 b*F< FileSplitterFetch[] fileSplitterFetch; //子线程对象 m9DTz$S. long nFileLength; //文件长度 `]l|YQz\ boolean bFirst = true; //是否第一次取文件 oe<@mz/ boolean bStop = false; //停止标志 :}#j-ZCC"
File tmpFile; //文件下载的临时信息 _sL;E<)y( DataOutputStream output; //输出到文件的输出流 7@k3-?q \W=Z`w3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (_3'nFg public SiteFileFetch(SiteInfoBean bean) throws IOException im)r4={
9 { ]HXHz(?;F siteInfoBean = bean; X1[zkb //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5'`DrTOA tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4?
rEO(SZ if(tmpFile.exists ()) >'WTVj ` { hl)jE
06 bFirst = false; xh25 *y read_nPos(); 7A$mZPKh } -QBM^L else -H|!KnR { W+4Bx=Mj nStartPos = new long[bean.getNSplitter()]; ,[dvs&-* nEndPos = new long[bean.getNSplitter()]; }w>UNGUMh } m*i,|{UZ mjk<FXW Q]RE,ZZ g
4$ } KilN`?EJ 1g$xKe~]4 bB*cd!7y public void run() 8f%OPcr& { nhZ/^`Y< //获得文件长度 6O0aGJ,H //分割文件 gt~u/Z% //实例FileSplitterFetch hD, |CQ //启动FileSplitterFetch线程 *UG?I|l|I //等待子线程返回 ]'hel#L;l try{ [' iEw! if(bFirst) 2$o\`^dy { x~D8XN{ nFileLength = getFileSize(); WVp6/HS if(nFileLength == -1) (b"q(:5oX { txX>zR*)
System.err.println("File Length is not known!"); EF9Y=(0| } )?LZg<< else if(nFileLength == -2) oBo |eRIt| { [W3sveqj& System.err.println("File is not access!"); {QOy'
8/ } V<ilv< else >S{8sN { Wdj|RKw for(int i=0;i<nStartPos.length;i++) yDRi { #|=lU4Bf nStartPos = (long)(i*(nFileLength/nStartPos.length)); #v6<9>% }
7$IR^ for(int i=0;i<nEndPos.length-1;i++) '0I> { Np$ue
}yr nEndPos = nStartPos[i+1]; slP>; } 3Lv5>[MnN nEndPos[nEndPos.length-1] = nFileLength; y*=Ipdj } 1/?K/gL } )YwLj&e4tf z"FxKN~Z ;Qc^xIPy //启动子线程 0c,!<\B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; y!q`o$nK for(int i=0;i<nStartPos.length;i++) |nqN95'u+] { @`iz0DPG?Y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N]\)Ok siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), nFn} nStartPos,nEndPos,i); f=8{cK0j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); i4M%{]G3Y fileSplitterFetch.start(); l=#b7rBP } %D%
Ok7s}) // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j^h:*rw siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7E5=Qx // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", T!^v^m@>y nEndPos = " + nFileLength); Wy /5Qw~s // fileSplitterFetch[nPos.length-1].start(); VM;vLUu!e `-?`H>+OG 6#a82_ //等待子线程结束 z$M-UxY //int count = 0; FiXqypT_( //是否结束while循环 )a%E $` boolean breakWhile = false; us.IdG [EK^0g 8~BLTZ while(!bStop) gQ<{NQMzvd { %:OX^^i; write_nPos(); 3/]~#y%2 Utility.sleep(500); RRl`;w? breakWhile = true; TpdYU*z_Br QcjsQTAbk 2~vvE for(int i=0;i<nStartPos.length;i++) j'lC]}kH { GXRW"4eF5 if(!fileSplitterFetch.bDownOver) |C0!mU { {xICR ~,* breakWhile = false; cxx8I break; B$S@xD $ } 46B'Ec } ]K%d if(breakWhile) cyh;1Q break; !\'HKk~V CdtCxy5 Fzn! //count++; .z*}%,G //if(count>4) FL&L$#X // siteStop(); Tr;&bX5]H } rX)_!mR ?JW/Stua Z>dvth System.err.println("文件下载结束!"); 7f<@+& } &!FI!T
-WH catch(Exception e){e.printStackTrace ();} .B'ws/%5\ } Kk|)N3AV: F;Q'R|HQ (nYGN$qC9 //获得文件长度 ;1>V7+/ public long getFileSize() o> &-B.zq { 42:,*4t( int nFileLength = -1; V >~\~H2Y try{ mcs!A/]< URL url = new URL(siteInfoBean.getSSiteURL()); 57_AJT hR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^Cj3\G4, httpConnection.setRequestProperty("User-Agent","NetFox"); 3{TE6&HIa Z2-"NB E5Ls/ HK int responseCode=httpConnection.getResponseCode(); N(O*"1b if(responseCode>=400)
=NWzsRl, { r?pN-x$M= processErrorCode(responseCode); u)%/df qzZ return -2; //-2 represent access is error PtGFLM9R } "#h/sAIs .}E@7^X e488}h6#m String sHeader; V@\u<LO0G R{6M(!x j9BcoEl:; for(int i=1;;i++) =%B}8$.| { ~b%dBn]n> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 8:Dkf v //Utility.log(in.readLine()); CX;
m8 sHeader=httpConnection.getHeaderFieldKey(i); MVEh<_ if(sHeader!=null) 474
oVdGx { hI*6f3Vn(n if(sHeader.equals("Content-Length")) Yqv!ZJ6 { "
^!=e72 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 'CRjd~L break; G}aM~, v } -oY8]HrXfK } H)Z$j&S{ else gOp81) break; t&IWKu# } }}Gkipp } !P6?nS catch(IOException e){e.printStackTrace ();} (v$
i catch(Exception e){e.printStackTrace ();} "5<YN# GY"c1KE$ $MM[`^~ Utility.log(nFileLength); Z`n "}{ Ij9=J1c4 0QEcJ]Qb8 return nFileLength;
vF'IK, } },O7NSG<o V2g"5nYT SzG?m] //保存下载信息(文件指针位置) >VG*La'c private void write_nPos() _6]tbni?v { `u8(qGg7GF try{ \#gguq?[ output = new DataOutputStream(new FileOutputStream(tmpFile)); J?jxD/9Yb output.writeInt(nStartPos.length); oMNBK/X_ for(int i=0;i<nStartPos.length;i++) N_(-\\mq { }hXmK.[' // output.writeLong(nPos); Z'd]oNF output.writeLong(fileSplitterFetch.nStartPos); WJ\,Y} J output.writeLong(fileSplitterFetch.nEndPos); ^xr &E } Q{~;4+ZD output.close(); $M1;d1e6' } MI`<U:-lP catch(IOException e){e.printStackTrace ();} ]=Wq&~ catch(Exception e){e.printStackTrace ();} %V(U]sbV } i3>_E <"9 1TgD;qX ,5x9o"N! //读取保存的下载信息(文件指针位置) I1p{(fJ private void read_nPos() p;mV?B?oAQ { [9yy<Z5 try{ ?O9| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); CH6;jo] int nCount = input.readInt(); Krr51`hZH nStartPos = new long[nCount]; cHnd
gUW] nEndPos = new long[nCount]; c2PBYFCyC for(int i=0;i<nStartPos.length;i++) }'uV{$ { k40`,;}9 nStartPos = input.readLong(); ]'z 5%' nEndPos = input.readLong(); !z5Ozm+} } 1W7ClT_cQ input.close(); Uu|R]azbO } z%$M
IC catch(IOException e){e.printStackTrace ();} c >xHaA:V catch(Exception e){e.printStackTrace ();} %~N| RSec } v\5`n@}4 cY|@s?3NND =ibKdPtTh^ private void processErrorCode(int nErrorCode) +Ecn { )Zfb M| System.err.println("Error Code : " + nErrorCode); n9k-OGJ } @680.+Kw xBE}/F$45 M4t:)!dji? //停止文件下载 RVr5^l;" public void siteStop() *tl; 0<n { <Q_E3lQy/ bStop = true; uFfk! for(int i=0;i<nStartPos.length;i++) zTw<9 Nf fileSplitterFetch.splitterStop(); 12}!oS~_ n_6#Df* IJLuu@kRm, } ye4GHAm,p } iz27yXHZ~ //负责部分文件的抓取 ^a7a_M **FileSplitterFetch.java Yd<9Y\W%? */ 9e;:(jl^ package NetFox; $kxu- H2yPVJ\Y)" R3*{"!O import java.io.*; Y,-!QFS# import java.net.*; {3``B#}
4G j ~pwk[Q! public class FileSplitterFetch extends Thread { HcGbe37Xq sl)]yCD|5 Q3[nS(#Z/= String sURL; //File URL nd{k
D>a long nStartPos; //File Snippet Start Position +)_#j/ long nEndPos; //File Snippet End Position 4p>, int nThreadID; //Thread's ID |W5lhx0U boolean bDownOver = false; //Downing is over USKC,&6&} boolean bStop = false; //Stop identical hcR^? FileAccessI fileAccessI = null; //File Access interface }-p-( HE+D]7^ O{EbL5p public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Q>WnSm5R { ov1#BeQ this.sURL = sURL; k>:\4uI|<\ this.nStartPos = nStart; ,E2c9V' this.nEndPos = nEnd; XLlJ|xhY-K nThreadID = id; "j=E8Dd} fileAccessI = new FileAccessI(sName,nStartPos);//定位 -9R.mG } ESuP ZB <,J O "P$')uwE public void run() lN_b&92 { VI)hA
^S while(nStartPos < nEndPos && !bStop) }'h\;8y { 8L*#zaSAf e/$M6l$Q*4 0"iQHi try{ X&A2:A 6\+ URL url = new URL(sURL); z\Z+>A HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kE1k@h#/ httpConnection.setRequestProperty("User-Agent","NetFox"); U :8cz=# String sProperty = "bytes="+nStartPos+"-"; _$KkSMA~_ httpConnection.setRequestProperty("RANGE",sProperty); |pE
~ Utility.log(sProperty); tD]vx`0> LWV^'B_X- #y1M1O g InputStream input = httpConnection.getInputStream(); %4w#EbkSS //logResponseHead(httpConnection); ^%qQ)>I=j UL xgvq u89Q2\z~"M byte[] b = new byte[1024]; $^W|@et{
] int nRead; @ZtvpL}e while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) tNxKpA |F { 4!Lj\.!$ nStartPos += fileAccessI.write(b,0,nRead); vH6.;j'^ //if(nThreadID == 1) N^jr // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); i$H9~tPs } 3&B- w BuS[( _"82W^W i Utility.log("Thread " + nThreadID + " is over!"); K pmq C$ bDownOver = true; cY.5z:7u~v //nPos = fileAccessI.write (b,0,nRead); J n'SGR } ^C;ULUn3 catch(Exception e){e.printStackTrace ();} 'NDr$Qc3 } yRt7&,}zL } ?F|F~A8dr *Q;?p
hr FMC]KXSd //打印回应的头信息 v R!
y# public void logResponseHead(HttpURLConnection con) {Bb:\N8X { 7~VDk5Z6 for(int i=1;;i++) 1}OM"V { =lx~tSiS String header=con.getHeaderFieldKey(i); _[N*k" if(header!=null) H_w?+Rig //responseHeaders.put(header,httpConnection.getHeaderField(header)); 'v5q/l Utility.log(header+" : "+con.getHeaderField(header)); ~g*5."-i else k!d<2Qp W break; Sp[]vm8N } >txeo17Ba\ } . $
HE 8*&YQId~ 2h1P!4W85 public void splitterStop() G'{&*]Z\: { Raf-I+ bStop = true; X5+$:jq& } <>V~ *C.Kdf3w Fm+V_.H/; } rv2;)3/* j2mMm/kq\ TwKi_nh2m /* r"dR}S.Uf **FileAccess.java y8dOx=c *//文件访问(定位,写) o 9d|XY_ package NetFox; j? Vs"d| import java.io.*; 'a>D+A: \ZBz]rh* GZm=>!T public class FileAccessI implements Serializable{ =]1g*~% }$s QmRR //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 l)V646-O,~ RandomAccessFile oSavedFile; LdnTdh? long nPos; ]hZk#rp} 'h[7AZ&)# :N' public FileAccessI() throws IOException B)rBM { F1p|^hYDW this("",0); uxL3 8d] } /'^BHA|h Y@+9Ukd/ u\km_e public FileAccessI(String sName,long nPos) throws IOException OK2\2&G { 1[\I9dv2 oSavedFile = new RandomAccessFile(sName,"rw"); LYTnMrM this.nPos = nPos; m;PTO$-- oSavedFile.seek(nPos); 'Y]<1M>.g } S5~(3I
)v D3y4e8+Z' 1U
='" public synchronized int write(byte[] b,int nStart,int nLen) {'#7b# DB> { u3sr"w& int n = -1; #q8/=,3EG try{ Se(apQH oSavedFile.write(b,nStart,nLen); Z1wfy\9c8 n = nLen; 4+4&}8FH } @9\E catch(IOException e) VYrs4IFT$ { =UxKa` e.printStackTrace (); S(: |S( } Ah
zV?6e Dc] J3r '@"A{mrE return n; !X=93% } " pL5j s*vtCdrE.
yaAg!mW } q'jInwY|x K:Z|# i- ppO!v? /* !ce,^z&5 **SiteInfoBean.java e{.P2rnh */ cN)noGkp package NetFox; l
Ng)k1 pzU:AUW A$TFa:O| public class SiteInfoBean { >9[wjB2?} &p=(0$0&- CDDEWVd private String sSiteURL; //Site's URL z{qn|#} private String sFilePath; //Saved File's Path q&,uJo private String sFileName; //Saved File's Name = Ruq private int nSplitter; //Count of Splited Downloading File t0)hdX x8&~ ?$b*)< public SiteInfoBean() &y ~GTEP {//nSplitter的缺省值为5 #twl //default value of nSplitter is 5 ;AT~?o`n this("","","",5); Tg v]30F) } 3
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Cx;h= 2X=*;r"{J public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) MUp{2_RA { -yY]0 sSiteURL= sURL; cA`X(Am6]g sFilePath = sPath; =7zvp,B sFileName = sName; _i0,?U2C this.nSplitter = nSpiltter; G3t\2E9S Il!#] TzsNhrU{ } Yd<q4VJR 1!2,K ot yzz(<s:o/ public String getSSiteURL() vrXNa8,L { -}Gk@=$G return sSiteURL; L(3}
H,t } wTVd){q`. $-_@MT~ $:*/^)L public void setSSiteURL(String value) XNB4KjT { Y_M3-H=0 sSiteURL = value; J ?H|" } |FZIUS{] <>[]-Vq mV'^4by public String getSFilePath() wfBf&Z0{ { __,}/|K2 return sFilePath; -wn(J5NnR } !8OUH6{2 yI}_
U !\N|$-M public void setSFilePath(String value) 5\P3JoH:Yg { #6qLu sFilePath = value; |%7OI#t^ } ? Eh)JJt Z)H9D(Za tvvRHvL public String getSFileName() UNd+MHE74I { %%Z|6V74 return sFileName; X4:SH>U! } BJ7m3[lz /,#&Htk RF.8zea{O` public void setSFileName(String value) P
:D6w){ { +UC- sFileName = value; dEM=U; } rJ}k!}G 5$p7y: Y'%k
G5nF public int getNSplitter() =f{YwtG { q<*UeyE
S return nSplitter; ITu5Y"x } 7e
D<( W-ll2b G%RhNwm public void setNSplitter(int nCount) gw);b)&mx { jFMf=u&U nSplitter = nCount; Y>: e4Q } gzDNMM } pJ 7="n #GT4/Ej}W >X!A/;$ /* kan4P@XVS **Utility.java ^-i<TJ */ 51lN,VVD package NetFox; z4yV1 $9Yk]~ R7xEE7p public class Utility { #XJ`/\E] t*'U|K4L/ XLNR%)l public Utility() (jY -MF3 { 0cBk/x^s &=d0'3k> zU1[+JJY"{ } (]l}QR%Bxu -I\Y
m_) //线程睡眠 $rG~0 public static void sleep(int nSecond) ~HH6=qjU) { Y$SwQ;wl try{ &7CAxU;i3 Thread.sleep(nSecond); ?Q XS? } 9M&uQccY catch(Exception e) c<gvUVHIxR { e:&(y){n( e.printStackTrace (); }L1-2 } *j0kb"# }
g^dPAjPQ +%hA6n //日志 C
{GSf`D!T public static void log(String sMsg) </OZ,3J= { -8]M
,,? System.err.println(sMsg); )+nY-DB( } ARD&L$AX c9
UJ= ;
iK9'u public static void log(int sMsg) >lRa},5( { ^\X-eeA System.err.println(sMsg); ;be2sTo } `n#
{} % } 5+gSpg]i -2dk8]KB] +s}"&IV% /* UoLvc~n7 **TestMethod.java HW)4#nLhh */ kAEm#oz=g package NetFox; L;7x2& Myj 68_wf J 1?)z+t9~ public class TestMethod { /idQfff m{/?6h 1 ng-g\&- public TestMethod() V'";u?h#S { ///xx/weblogic60b2_win.exe R(?g+:eCpM try{ tntQO!pM SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); =+T$1 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); pV>M,f SiteFileFetch fileFetch = new SiteFileFetch(bean); '\$2+* fileFetch.start(); cMCGaaLU } V Q6&7@
c catch(Exception e){e.printStackTrace ();} /e^q>>z Ix;9D'^} q
F\a]e } U{2[nF { XN"L3A Fxu'(xa public static void main(String[] args) &*wN@e(c { H1]An'qz, new TestMethod(); Pd99vq/ } cr{;gP } <<zYF.9L] 点击下载更多相关资料
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