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/* u3kK!2cdP **SiteFileFetch.java o#E 3{zM */ ';??0M package NetFox; e;pVoRI import java.io.*; hu\HK81m import java.net.*; bJe*J\){ ~c[}%Ir> _Jj/"? public class SiteFileFetch extends Thread { qie7iE`o YE&"IH]lF La?q> SiteInfoBean siteInfoBean = null; //文件信息Bean c;e-[F 7 long[] nStartPos; //开始位置 Ld? tVi long[] nEndPos; //结束位置 |x["fWK FileSplitterFetch[] fileSplitterFetch; //子线程对象 =<(:5ive long nFileLength; //文件长度 8):I< }s# boolean bFirst = true; //是否第一次取文件 vJ>A
>RCB boolean bStop = false; //停止标志 "^gZh3 File tmpFile; //文件下载的临时信息 !zL1XW)q DataOutputStream output; //输出到文件的输出流 bv0B -@i)2J_WP //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6BVV2j)zl: public SiteFileFetch(SiteInfoBean bean) throws IOException .%`|vGF { )7=B]{B_ siteInfoBean = bean; P]T(I/\g //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X`]-)(UX tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G;V@oT if(tmpFile.exists ()) /dhx +K~ { Pca~V>Hd bFirst = false; sW+YfJT read_nPos(); PC/fb-J } KgVit+4u/ else "e g`3v { %@ $h?HP nStartPos = new long[bean.getNSplitter()]; q#v.-013r nEndPos = new long[bean.getNSplitter()]; QRdNi1&M } $ZYEH %0INtq o^4qY <1&kCfE& } ~X5yHf3 +,7dj:0S c a_N76o! public void run() m{!BSl { )V JAs| //获得文件长度 ?+GbPG~ //分割文件 +-'qI_xo //实例FileSplitterFetch E xKH%I //启动FileSplitterFetch线程 nFW^^v< //等待子线程返回 vX)6N#D! try{ MjE.pb if(bFirst) EG&^;uU { n=r}jRH1 nFileLength = getFileSize(); :7Rs$
-*Uk if(nFileLength == -1) (U2G" { )(*A1C[ System.err.println("File Length is not known!"); Di9yd } D/V.o}X$ else if(nFileLength == -2) *)ed( +b { J:f>/ System.err.println("File is not access!"); l}335;( } W)^:*z else '15j$q { BQSA;;n] for(int i=0;i<nStartPos.length;i++) yt>Pf<AI { yNc>s/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Yc=y Vh } -6~*:zg, for(int i=0;i<nEndPos.length-1;i++) Sn.I
]:l { seHwn'Jn nEndPos = nStartPos[i+1]; b-]E-$Uz } oHI~-{m3) nEndPos[nEndPos.length-1] = nFileLength; XZcsx } <Xp
F } H24g+<Tv POH>!lHu qS&PMQ"$ //启动子线程 U`FybP2R~ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; WeuV+}\b for(int i=0;i<nStartPos.length;i++) '`"LX!"ZO { -_uL;9r fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *IGxa siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), =d~]*[8 nStartPos,nEndPos,i); n8[sR;r5f Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x@DXW( fileSplitterFetch.start(); eno*JK } {,IWjt &> // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?MKf=!w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); P)1@HDN== // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \q3H#1A nEndPos = " + nFileLength);
tyP-J4J // fileSplitterFetch[nPos.length-1].start(); f*XF"@ZQV \2_>$:UoV edGV[=]F //等待子线程结束 Ez?vJDd //int count = 0; :FG}k Y //是否结束while循环 Q)#<T]~= boolean breakWhile = false; oCy52Bm.! HZ8
j[kO UgJlXB|a%2 while(!bStop) <kLY1EILM { 8S]Mf*~S' write_nPos(); &M>S$+I
n Utility.sleep(500); L!S-f4^5 breakWhile = true; yel>-=Vn d/Py, ,EZ&n[%Ko for(int i=0;i<nStartPos.length;i++)
@KOa5-u { e"r}I!. if(!fileSplitterFetch.bDownOver) /lr RbZ { KG>.7xVWV7 breakWhile = false; !Q.c8GRUQ break; Z6D4VZVF } ^{6Y7T] } FT|*~_@ if(breakWhile) iM8hGQ` break; rFx2S /4_}wi\ *N>Qj-KAM_ //count++; =7e8N&-nv //if(count>4) ^]U2Jd // siteStop(); H5&>Eny } "3\RJ?eW:S 7e8hnTzl8< P?9CBhN System.err.println("文件下载结束!"); EHzZ9zH\ } '/sc `(`:0 catch(Exception e){e.printStackTrace ();} m9L+|r } H~ks"D1 lg8~`96 T^sxR4F //获得文件长度 YvYav d public long getFileSize() >F+:ej { bzJKoxU int nFileLength = -1; 6:B5PJq try{
A:D\!5= URL url = new URL(siteInfoBean.getSSiteURL()); V ?_%Y<|L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); LL[+QcH httpConnection.setRequestProperty("User-Agent","NetFox"); +ixDB0"\ dH`a|SVW9 >,] #~d int responseCode=httpConnection.getResponseCode(); ]6:5<NW if(responseCode>=400) >p<(CVX[ { SN]/~>/ processErrorCode(responseCode); Gi<f/xQk> return -2; //-2 represent access is error vi5~ Rd` } 5Q%#Z
L/' Y\op9Fw E_H1X'|qS4 String sHeader; qL'3MY.! W2<X 5' ?-i|f_` for(int i=1;;i++) c<H4rB { 3zl!x //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); _p_F v>>: //Utility.log(in.readLine()); 3/ [= sHeader=httpConnection.getHeaderFieldKey(i); KDXo9FzF if(sHeader!=null) Iewq?s\Fo { Etl7V if(sHeader.equals("Content-Length")) '@fk(~| { 3R{-\ZMd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1B1d>V$* break; RF;N]A?* } B"qG-ci } 5=?&q 'i else ?DRC!
9o^ break; Ee|@l3) } >N,G@{FR } CD[7h catch(IOException e){e.printStackTrace ();} #ERn 8k catch(Exception e){e.printStackTrace ();} VLO>{"{' :?p{ga9 +]>a`~ Utility.log(nFileLength); bkM$ Qo z N
t7DK /tUl(Fp J` return nFileLength; 4/h2_
} Gt1Up~\s Gg!))I+ jNyC%$ //保存下载信息(文件指针位置) .Yf
h* private void write_nPos() .U1dcL6 { Y{O&-5H^| try{ ex|kD*= output = new DataOutputStream(new FileOutputStream(tmpFile)); gSGe] output.writeInt(nStartPos.length); +p[~hM6? for(int i=0;i<nStartPos.length;i++) gO/(/e>P { eyE&<:F#J // output.writeLong(nPos); uVk8KMYU output.writeLong(fileSplitterFetch.nStartPos); \
bhok output.writeLong(fileSplitterFetch.nEndPos); QB.7n&u } ]u,~/Gy output.close(); /Mk)H
d } YL.z|{\e catch(IOException e){e.printStackTrace ();} h49Q2` catch(Exception e){e.printStackTrace ();} ]SPB c } =&p bh G8&'*7Bb Yn#8uaU //读取保存的下载信息(文件指针位置) PWmz7*/ private void read_nPos() 68!]q(!6F { SH(kUL5 try{ vr vzV DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); RasoOj$ int nCount = input.readInt(); U;nC)'~YW9 nStartPos = new long[nCount]; UQ8x#(`ak nEndPos = new long[nCount]; L,ra=SV F for(int i=0;i<nStartPos.length;i++) =I5XG"", { g\l;> nStartPos = input.readLong(); R#`itIYh nEndPos = input.readLong(); "a
g_ } ~h@tezF input.close();
U<t-LF3 } <2Q@^ catch(IOException e){e.printStackTrace ();} Y/^<t'o& catch(Exception e){e.printStackTrace ();} n>4S P_[E7 } S?{5DxilO ep?0@5D}] '-vyQ^ private void processErrorCode(int nErrorCode) 3dbf! { VZ,T`8" System.err.println("Error Code : " + nErrorCode); &8pXkD#A } 9,W-KM % n{W $ {+.1"/[ //停止文件下载 zfZDtKq public void siteStop() m=9N^_ { VMWg:=~$ bStop = true; "uCQm ' for(int i=0;i<nStartPos.length;i++) lkm(3y@']A fileSplitterFetch.splitterStop(); A!D:Kc3
.}E)7"Qi, lP
e$AI } X\x9CA } /kz&9FM //负责部分文件的抓取 d.AjH9 jg **FileSplitterFetch.java [z~Nw# */ K[[k,W]qb package NetFox; .ndQ(B LC{hoq\
SoX V import java.io.*; mig3.is import java.net.*; X W)A~wPBs =5`@:!t7 ~Hs{(7 public class FileSplitterFetch extends Thread { dO[4}FZ$ gp)ds^ `VsGa String sURL; //File URL Lm|X5RVq long nStartPos; //File Snippet Start Position X2[cR;;' long nEndPos; //File Snippet End Position KV_Ga8hs int nThreadID; //Thread's ID }#8uXA boolean bDownOver = false; //Downing is over ? st#6=M boolean bStop = false; //Stop identical 0I((UA/7Zs FileAccessI fileAccessI = null; //File Access interface kKM%
b..$5 Z-|C{1}A public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException .LhmYbQ2WE { CiI:
uU this.sURL = sURL; _w;+Jh this.nStartPos = nStart; :Y>]6 this.nEndPos = nEnd; At(9)6n8 nThreadID = id; [QbXj0en$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 .Qt3!ek } gN(hv.nQ <gLtX[v!CL 05B+WJ1 public void run() m;f?}z_\$ { }qhK.e while(nStartPos < nEndPos && !bStop) 5$U>M { kW&Z%k qD*\}b]9I
sK0VT"7K try{ F5+_p@!i URL url = new URL(sURL); g i'agB^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A#S:_d httpConnection.setRequestProperty("User-Agent","NetFox"); <UJJ],)^1A String sProperty = "bytes="+nStartPos+"-"; 7[BL 1HI* httpConnection.setRequestProperty("RANGE",sProperty); |nN/x<v Utility.log(sProperty); io7U[ # C-u/{CP Ok&>[qu InputStream input = httpConnection.getInputStream(); HY;?z`= //logResponseHead(httpConnection); %uVJLz Lc<xgN+cJ /dt!J
`: byte[] b = new byte[1024]; L59oh int nRead; |ozoc"' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6;frIl; { zL'IN)7MU nStartPos += fileAccessI.write(b,0,nRead); $af}+:' //if(nThreadID == 1) -!,]Y10 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jHlOP,kc } 7/_ VE 'S7@+kJ \Z20fh2 Utility.log("Thread " + nThreadID + " is over!"); 3D{4vMmX bDownOver = true; ^:DhHqvK //nPos = fileAccessI.write (b,0,nRead); Pmlgh&Z } QX.6~*m1 catch(Exception e){e.printStackTrace ();} %K'*P56 } m}[~A@qD } N5s|a5 /Jf`x>eiH v7FRTrqjj //打印回应的头信息 |vN@2h(|" public void logResponseHead(HttpURLConnection con) 8UT%:DlxQ { #A9_A%_.h for(int i=1;;i++) 3
9{"T0 { eM=) >zl String header=con.getHeaderFieldKey(i); '0')6zW5s if(header!=null) c48J!,jCd' //responseHeaders.put(header,httpConnection.getHeaderField(header)); %;(|KrUN Utility.log(header+" : "+con.getHeaderField(header)); _~ZQ b else xPMyG); break; _:X|R#d } * \o$-6<
} N~;
khS] hLbT\J`I zc/%1 public void splitterStop() >Ug?O~- { w<~<(5mM5; bStop = true; }SMJD } cbCE
$ NQ!N"C3u E`uaE=Mdq } %Mng8r *76viqY;dE _lPl)8k /* ?3,64[ **FileAccess.java Dg>'5`& *//文件访问(定位,写) $wYuH9( package NetFox; X!rQ@F3 import java.io.*; 8jjk?PUD8 '!^E92 vN,}aV2nq public class FileAccessI implements Serializable{ OKZam ik~ >!Ap/{2 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 nK jeH@ RandomAccessFile oSavedFile; \gp,Txueb long nPos; AO}i@YJth YKe0:cWc Z0"& public FileAccessI() throws IOException Naf`hE9 { !*?(Q6 this("",0); adO!Gs9f? } I,<>%Z|' \'?? Jn[q<e" public FileAccessI(String sName,long nPos) throws IOException 85%Pq:E { u1;e*ty oSavedFile = new RandomAccessFile(sName,"rw"); X(!AI|6Bt this.nPos = nPos; VX!Y`y^a oSavedFile.seek(nPos); ~*mOt7G } uZ/7t(fy N{^>MRK=5 l|vWeBs public synchronized int write(byte[] b,int nStart,int nLen) PUE'Rr(Q { )7I.N]= int n = -1; ST:
v3* try{ UN *dU oSavedFile.write(b,nStart,nLen); 1akD]Z n = nLen; 6)#- 5m } rKzv8d catch(IOException e) ayH%
qp { //X e*0 e.printStackTrace (); E+m]aYu" } 9B+ zJ Vte ^p"4)6p-W KkdG.c' return n; uP%axys } ^<>Jw%H y\)G7
( 2H?I'<NoC } Bbl)3$`, O^X[9vrW m~Y'$3w /* ' 1P=^ **SiteInfoBean.java xm}q6>jRV */ vbRrk($` package NetFox; (>rS
_#^ wRXn9 t<!+b@l5 public class SiteInfoBean { YQ 8j IqhICC1V- 7>PF ~= private String sSiteURL; //Site's URL 4f4 i1i: private String sFilePath; //Saved File's Path O1x0[sy private String sFileName; //Saved File's Name aCU7w5 private int nSplitter; //Count of Splited Downloading File -5V)q.Og e;A^.\SP ;Cr_NP[8|j public SiteInfoBean() cg(QjH" {//nSplitter的缺省值为5 (
}]37 //default value of nSplitter is 5 #*yM2H"7,; this("","","",5); 943I:, B } L4YVH2`0) JCw{ ?^F" #<a_: m)@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) )(h&Q?
Ar { %~#!NX sSiteURL= sURL; r{K\(UT]! sFilePath = sPath; {B FT sFileName = sName; F5N>Uqr*oN this.nSplitter = nSpiltter; [{S;%Jj*X/ ?%cn'=>ZI -yX.Jv } CRZi;7`*1 I@3Q=14k% =cf{f]N public String getSSiteURL() LPEjRG, { T&9`?QD return sSiteURL; 94T}iY. } )u39}dpeu <@u0.-] 5TXg;v#Z public void setSSiteURL(String value) k~0#'I9 { =4frP*H? sSiteURL = value; PHQ{-b?4t } $.oOG"u0] 0s860Kn 0zeUP{MQ public String getSFilePath() !(kX~S { Bz~ -2#l return sFilePath; 6RK ~Dl&g } =E;=+eqt \e?.hmq w) =eMdj\o public void setSFilePath(String value) f!5F]qP>- { kx|me~I
sFilePath = value; +VSZhg,Np8 } wENzlXeOP ]UK`?J=t2g ^F>4~68d public String getSFileName() ^Vag1(hdq { f"Ost;7zg return sFileName; 60`+9(^ } fph-v -cl e Wc_ N T1l&B public void setSFileName(String value) W;^N8ap% {
%)pP[[h sFileName = value; Hab!qWK` } OZG0AX+=# O[; +i pPoH5CzcK public int getNSplitter() ?K0U3V$s { pp(H
PKs=} return nSplitter; Oz:D.V
3~ } s>T`l fCLcU@3W? Gu2_dT public void setNSplitter(int nCount) ft{W/ * +_ { a]`itjL^ nSplitter = nCount; /Z:N8e } >Cvjs } \0D$Mie 1XG$ z@NN /v5qyR7an /* rxQ<4 **Utility.java ICk(z~D~ */ WS5A Y @(~ package NetFox; ?RDO] I> Ru:n~77{ KL
"Y!PN: public class Utility { 1:_=g #WH p:B
]Ft ~u!gUJ: public Utility() j5zFDh1( { Z)NrhJC T$u~E1 7k `_# } "r@G@pe U M@naU //线程睡眠 K${}r0 public static void sleep(int nSecond) zyDZ$Dhka { T:U4:"
try{ G[#.mD{k Thread.sleep(nSecond); Khj=llo, } 3)y{n%3L catch(Exception e) z4g+2f7h-X { eO'xkm e.printStackTrace (); )`<6taKx@n } 90p3V\LO } i (0hvV>' BH5w@ //日志 prUHjS public static void log(String sMsg) $R"; { 0rcjorWI System.err.println(sMsg); ^PC\E} } ~Yl<S(/4 P])L8zK dN<5JQql public static void log(int sMsg) +lKrj\Xj { +5-]iKh System.err.println(sMsg); XoJgs$3B } 8^y= H= } vb
%T7 ;,dkJ7M iOll WkF /* [%jxf\9jJ_ **TestMethod.java Q&gPa]z]} */ @HvScg*Y package NetFox; d5:tSO K@6`-|I dnwdFsf public class TestMethod { O4E(R?wd WO@H* 8[~~gYl public TestMethod() [^M|lf { ///xx/weblogic60b2_win.exe x<@kjfm5 try{ HVGr-/ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VJg,~lQN#t //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 7G"7wYc>R SiteFileFetch fileFetch = new SiteFileFetch(bean); ,%Z&*n fileFetch.start(); SW#BZ3L } |Ytg catch(Exception e){e.printStackTrace ();} 6b<+8w [fxuUmU sQtf,e|p } 5DOE3T`^Oc oIR.|=Hk{ U@?6*,b(. public static void main(String[] args) {`F1u?l {
/W`$yM3 new TestMethod(); 5%P[^} } E=kw)<X2 } )v1CC.. 点击下载更多相关资料
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