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/* q9 brpbg_ **SiteFileFetch.java dA)4(0o8fD */ rrY{Jf9> package NetFox; H'0*CiHes import java.io.*; Kt90mA import java.net.*; l?JO8^Nn jqGo-C~ 0"^oTmQN public class SiteFileFetch extends Thread { 9U<)_E<y SZ2q}[o`R }C{}oLz SiteInfoBean siteInfoBean = null; //文件信息Bean Q)6wkY+! long[] nStartPos; //开始位置 }1]!#yMfq long[] nEndPos; //结束位置 OgXZ-<' FileSplitterFetch[] fileSplitterFetch; //子线程对象 oA;jy long nFileLength; //文件长度 H@2v<e@ boolean bFirst = true; //是否第一次取文件 V1`5D7Z boolean bStop = false; //停止标志 #HM\a File tmpFile; //文件下载的临时信息 I4<{R DataOutputStream output; //输出到文件的输出流 /s8%02S L_~I~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) e}R2J`7 public SiteFileFetch(SiteInfoBean bean) throws IOException 9O=05CQ { o?va#/fk siteInfoBean = bean; CS;W)F //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); K_&c5(-(_ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); A:.IBctsd if(tmpFile.exists ()) YoF\MT]W { 1>@]@ST[: bFirst = false; 38U5^` read_nPos(); 2u~c/JryN } Xrj(,| else |.8d,!5w} { kg?T$}O nStartPos = new long[bean.getNSplitter()]; 11B{gUv.] nEndPos = new long[bean.getNSplitter()]; Y-%l7GErhL } xV,4U/T /h7>Z9T Y*kh$E%<# qXU:A-IdIl } Z9"{f)T \2R`q*a+ KO-Zz&2f public void run() z[5Y
Z~}* { [/AdeR //获得文件长度 k,;lyE //分割文件 Pu$kj"|q*[ //实例FileSplitterFetch qP;{3FSkAF //启动FileSplitterFetch线程 ~Q_)>|R2 //等待子线程返回 P e$^Mo.q try{ )4!CR /ao if(bFirst) 0H OoKh { lTV@b& nFileLength = getFileSize(); o5=)~D{/G3 if(nFileLength == -1) NoJnchiU { uG=t?C6 System.err.println("File Length is not known!"); ^J#?hHz } 3^02fy else if(nFileLength == -2) FI?gT { %Ye)8+- System.err.println("File is not access!"); ;z.6'EYMG } yfM>8"h@ else `'xQ6Sy { DMAf^.,S for(int i=0;i<nStartPos.length;i++) 6z9R1&~% { nc3ltT,R nStartPos = (long)(i*(nFileLength/nStartPos.length)); -uv
9(r\P } <}28=d for(int i=0;i<nEndPos.length-1;i++) K-2o9No?j` { Gg=aK~q6 nEndPos = nStartPos[i+1]; KFTf~!|
} R<n8M"B nEndPos[nEndPos.length-1] = nFileLength; L,C? gd@" } aPD?Bh>JU } $f<eq7rRe }t@f|TX m4Phn~>Gg //启动子线程 3}>: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; g[#k.CuP for(int i=0;i<nStartPos.length;i++) 'DCKD4@C/ { }zkL[qu; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c!\.[2n siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), jw/'*e nStartPos,nEndPos,i); qs6Nb'JvQR Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 935-{h@k fileSplitterFetch.start(); MB]#%g& } ~/j$TT" // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gt
=j5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); XGE
2J // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", xb4Pt`x)rS nEndPos = " + nFileLength); {E3xI2 // fileSplitterFetch[nPos.length-1].start(); Ne &Xf o,?!"*EP ]regi- LGU //等待子线程结束 DAjG*K{ //int count = 0; =oo[ Eyr //是否结束while循环 $R A4U< boolean breakWhile = false; h]kn%?fpmB Z"6 2#VM cr76cYq"Q while(!bStop) t[]['Iosd { `Mg8]H~ write_nPos(); cJxW;WI!, Utility.sleep(500); vC{h2A breakWhile = true; \ V[;t- t2=a(N-/, Pv< QjY for(int i=0;i<nStartPos.length;i++) M0cd-Dn { ~A^E if(!fileSplitterFetch.bDownOver) G;2R]H#p { F;IP3tD breakWhile = false; mSU@UD|' break; C-Nuy1o } J?._/RL8- } qq
OxTG] if(breakWhile) fA"<MslKLK break; \bU` Qo'yS"g<9) ! G*&4V3Mg //count++; f=t:[<
) //if(count>4) 7)B&(2D& // siteStop(); x1t{SQ-C } ctp?y {/-y>sm j_!bT!8 System.err.println("文件下载结束!"); }TSgAwsbC } dX_!0E[c catch(Exception e){e.printStackTrace ();} Wt>J` } x|.v{tQa fx<FIj7 sB?2*S"X)< //获得文件长度 HwB {8S?sm public long getFileSize() znt)]>f# { ?Fce!J int nFileLength = -1; <v]z6B@9! try{ ^:m^E0(H URL url = new URL(siteInfoBean.getSSiteURL()); @'*eC}\E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [-4KY4R httpConnection.setRequestProperty("User-Agent","NetFox"); K'x4l,rq dw~[9oh ^uia`sOP4 int responseCode=httpConnection.getResponseCode(); *~cqr if(responseCode>=400) 3I|O^ { \,2gTi,= processErrorCode(responseCode); w'A tf return -2; //-2 represent access is error &B}Lo
} E_~x==cb Yg/}ghF\ q7|:^#{av String sHeader; #;`Oj 27m@|M] R C`)_i3
^ for(int i=1;;i++) b 8>q; { gc##V]OD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Hk@r5<{ //Utility.log(in.readLine()); XlVc\? sHeader=httpConnection.getHeaderFieldKey(i); >W
r$Y{ if(sHeader!=null) eI^gV'UK { {|z#70 if(sHeader.equals("Content-Length")) ?{eY\I { F$i$a b nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); R<|ejw break; R\*)@[y9l } s2^B(wP } sm1;MF]/u else ^00{Hd6 break; 'f*O#&? } fuMN"T 6%+ } TtPr)F| catch(IOException e){e.printStackTrace ();} #:#Dz.$L catch(Exception e){e.printStackTrace ();} q]TqI' o bw9
nB{C< ]BfS270 Utility.log(nFileLength); vs+QbI6>- -j&Vtr .Rvf/-e return nFileLength; }S */b1 } ZZ("-#? #F!Kxks ^2EhlK^) //保存下载信息(文件指针位置) }%$OU = T private void write_nPos() ?KB@Zm+#~ { Ad/($v5+ try{ xI?0N<'.*q output = new DataOutputStream(new FileOutputStream(tmpFile)); eRs&iK2y output.writeInt(nStartPos.length); ox[ .)v for(int i=0;i<nStartPos.length;i++) (0OM"`j { 3V}(fnv // output.writeLong(nPos); 96=Z" output.writeLong(fileSplitterFetch.nStartPos); o&z!6"S< output.writeLong(fileSplitterFetch.nEndPos); 3C M^j<9 } %G[/H.7s- output.close(); F;P5D< } -IU4#s catch(IOException e){e.printStackTrace ();} s)ky/ce catch(Exception e){e.printStackTrace ();} )t%h[0{{ } ?ok)>P eLV.qLBUs #dxvz^2V.3 //读取保存的下载信息(文件指针位置) /;l[I=VI private void read_nPos() fagM7)x { #Ao !>qCE try{ 1[-vD= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9Kbw
GmSU int nCount = input.readInt(); k][h9' nStartPos = new long[nCount]; 2Lfah?Tx~C nEndPos = new long[nCount]; E]1##6Ae for(int i=0;i<nStartPos.length;i++) V&*D~Jq { NEVp8)w nStartPos = input.readLong(); s?c JV` nEndPos = input.readLong(); 5/?P|T } @7W?8 input.close(); qSTW b% } rslvsS: catch(IOException e){e.printStackTrace ();} jXp. qK\" catch(Exception e){e.printStackTrace ();} c<4F4k7 } ?Vc0) VI_+v[Hk/ ]
8Tzr private void processErrorCode(int nErrorCode) 6+3 $:? { jj,r <T System.err.println("Error Code : " + nErrorCode); l5k?De_(x } {<K=*rrZ 9x?'} 8sg|MWSU //停止文件下载 Fp%Ln(/m public void siteStop() Wp[9beI*M { ar$*a>'? bStop = true; ?pG/m%[ for(int i=0;i<nStartPos.length;i++) =45W\ fileSplitterFetch.splitterStop(); kRlA4h1u_$ q]FBl}nwl% 9S>g6}[E#0 } +sf .PSz$ } !^WHZv4 //负责部分文件的抓取 S^N{wZo **FileSplitterFetch.java :( ,mL2[ */ fu4!t31 package NetFox; 0V`[Zgf dv!r. ,j178EX import java.io.*; ?djQZ* import java.net.*; opp!0:jS* .Djta|puu C6jR=@42Q public class FileSplitterFetch extends Thread { zN!j%T.e
BStk&b kOjf #@c String sURL; //File URL Lm6**v long nStartPos; //File Snippet Start Position u =J&~ long nEndPos; //File Snippet End Position ~L{l+jK$p int nThreadID; //Thread's ID VkZ.6kV boolean bDownOver = false; //Downing is over =Op+v" boolean bStop = false; //Stop identical (D7$$!} FileAccessI fileAccessI = null; //File Access interface #;Tz[0 4W;S=#1 pe.QiMW{8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `A)"%~ { h<x4YB5Mj this.sURL = sURL; wCCV2tk this.nStartPos = nStart;
u0
y 1 this.nEndPos = nEnd; 2@khSWV nThreadID = id; 4kl Ao$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 X`JVR"=4 } ?*u*de[, S6D^3n gl7|H&&xV public void run() }]6f+ { f p[,C1U while(nStartPos < nEndPos && !bStop) qCPmbg { %d;ezY '2 (sTuG}
t ls60h try{ 1m@^E:w URL url = new URL(sURL); 9 OT,TpA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N#ioJ^}n: httpConnection.setRequestProperty("User-Agent","NetFox"); X+82[Y,mB. String sProperty = "bytes="+nStartPos+"-"; :iUF7P1I httpConnection.setRequestProperty("RANGE",sProperty); k'3Wt*i Utility.log(sProperty); 6.c^u5; Z?G&.# : Vba.uKNjk InputStream input = httpConnection.getInputStream(); (zcLx;N
//logResponseHead(httpConnection); M(Zc^P}N I#rubAl _$s> c!t,# byte[] b = new byte[1024]; IV `%V+
f int nRead; D(]E/k@;~ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &
,hr8 { YY5!_k nStartPos += fileAccessI.write(b,0,nRead); y~
rXl //if(nThreadID == 1) `T&jPA9eY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z(13~38+ } wvby?MhPY z rfUQO O7G"sT1Dv Utility.log("Thread " + nThreadID + " is over!"); k cuzB+ bDownOver = true; 7h9U{4r: M //nPos = fileAccessI.write (b,0,nRead); 19UN*g3( } y1f:?L-z catch(Exception e){e.printStackTrace ();} 1;F`c`0< } vVxD!EL } s1j{x&OSq g(E"4M@t! t^tmz PWA //打印回应的头信息 gm"#:< ) public void logResponseHead(HttpURLConnection con) }6u2*(TmD { 8|^CK|m6* for(int i=1;;i++) {*m ?Kc7k { SPkn3D6 String header=con.getHeaderFieldKey(i); ipE]}0q if(header!=null) <wd]D@l7r //responseHeaders.put(header,httpConnection.getHeaderField(header)); +9;2xya2 Utility.log(header+" : "+con.getHeaderField(header)); fS&6 else X[yNFW}S2W break; h*i9m o } C})'\1O% } Zyf P;& wq!iV | q(M:QWA q public void splitterStop() <%?#AVU[ { r(A.<`\ bStop = true; \}0-^(9zd } f58?5(Dc| 2{|$T2?e {Qu"%h.Al } 2}U!:bn( KzUlTl0 muON>^MbC /* <@v]H@E **FileAccess.java f .
}c7 *//文件访问(定位,写) C#0Qd% package NetFox; Ah69
_>N`S import java.io.*; xg@NQI@7 [{u(C!7L` ?#A]{l public class FileAccessI implements Serializable{ 8hanzwoJ: V~IIYB7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 f9$xk|2g RandomAccessFile oSavedFile; +j14Q$ long nPos; l! bv^ i]{1^pKq 3>M&D20Z public FileAccessI() throws IOException !U%T&?E l { >w6taX this("",0); @@G6p($ } -e GL) M W!Gdf^Yy< (.Y/ public FileAccessI(String sName,long nPos) throws IOException rh*sbZ68>E { 1Tp/MV/> oSavedFile = new RandomAccessFile(sName,"rw"); $g9**b@ this.nPos = nPos; }n:?7 oSavedFile.seek(nPos); >R,'5:Rw } U&Wwyu:4i
pmvT$;7I ^"\s eS public synchronized int write(byte[] b,int nStart,int nLen) 8)*2@-Rp { Fh|#u:n int n = -1; SymwAS+ try{ R7jmv n oSavedFile.write(b,nStart,nLen); >r@.F% n = nLen; K BE Ax3 } B;6]NCxD catch(IOException e) 9LnN$e { ;h=*!7:
e.printStackTrace (); k*rZ*sSp } `>(W"^ y;cUl, :v zdl%iop3e return n; = {'pUU
} 3\O|ii .jw}JJ {]*x*aa\ } rHge~nY< J@pb[O L, (:V>Hjt /* +ECDD'^! **SiteInfoBean.java _Q%vK*n */ ^g1f X1 package NetFox; S{]7C?4` u9woEe? Jq.lT(E8D public class SiteInfoBean { O=cxNy-I ,fDEz9-, `^JJ&)4iv private String sSiteURL; //Site's URL n"PJ,ao private String sFilePath; //Saved File's Path [D"t~QMr private String sFileName; //Saved File's Name Y}*\[}l:&x private int nSplitter; //Count of Splited Downloading File 'nQVj '+>fFM,*B N]EcEM # public SiteInfoBean() 1LJuCI=~ {//nSplitter的缺省值为5 gJiK+&8I //default value of nSplitter is 5 -$VZtex this("","","",5); s&kQlQ= } >>b3ZE|5 ,C.:;Ime({ D-Vai#Cd public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) AE`We$! { X[s8X!# sSiteURL= sURL; =h6
sPJ sFilePath = sPath; b !@Sn/ sFileName = sName; qW:)!z3\ this.nSplitter = nSpiltter; 'TC/vnM .MW@; `i) 2nNJ" } `(+o=HsD iB0WEj[? ,r^M?> public String getSSiteURL() r"2V { 5AS[\CB4 return sSiteURL; Qp"y?S } 4to% `)] Xv <G-N4 a {}|Bf< public void setSSiteURL(String value) G&xo1K] { hv 6@Jr3 sSiteURL = value; _Y=2/*y^ } <^~FLjsfg .?p\n7 jN-vY<?h] public String getSFilePath() P7ph}mB { etT + return sFilePath; H.<a`mm8 } e~ aqaY~} JjpRHw8\ n%R;-?*v public void setSFilePath(String value) FlfI9mm { zl-2$}<a sFilePath = value; V@7KsB } K3uG2g(>2 oRKEJNps kg][qn|>J] public String getSFileName() jV#ahNq; { n?\ nn3 return sFileName; `nKH"TaX } &R|/t:DN fP
tm0.r (>6*#9#p public void setSFileName(String value) +x9cT G { {e|*01hE sFileName = value; |py6pek| } uPYmHA}_/ gj\)CBOv q#Zs\PD public int getNSplitter() ZvYLL{>}w { QB:i/9 return nSplitter; 4k/VBZB } E3@QI?n^^ =.]l*6WV [S.ZJUns public void setNSplitter(int nCount) RT93Mt%P { < v]3g nSplitter = nCount; <R%;~) { } 6Ao%>;e* } BQcE9~H JGC=(; kyAXRwzI /* O3N0YGhJ **Utility.java I$Qs;- ( */ 5qg2Zc~ package NetFox; 4`Q3v4fOF ;fw1 ky
8e p public class Utility { ml@2wGyf t NsPB6Z "fg](Cp[z public Utility() cJM: { <APB11 mrm^e9*Z =X?\MVWB } )
\Y7& i>EgG5iJ //线程睡眠 7NC=*A~ public static void sleep(int nSecond) 1h*)@ { 9ukg }_Hx try{ D+~_TA Thread.sleep(nSecond); 1)}=bhT } k5kdCC0FCk catch(Exception e) h8\
T { th6+2&B6 e.printStackTrace (); Qn ^bVhG+ } o7B[R) 4 } 5L:1A2Z?c |AlR^N //日志 yNm:[bOER public static void log(String sMsg) Z5c~^jL$- { /h v4x9 System.err.println(sMsg); k3+e;[My+ } >7!6nF3x, tb:L\A^: %Pksv} public static void log(int sMsg) l5+gsEux] { |F.)zC5{ System.err.println(sMsg); ,!V]jP) } @&D?e:|!U }
;> m"x [2ax>Yk$ vP7K9Kx /* GDYFU*0 **TestMethod.java 9%*wb`& */ >3awn*N package NetFox; :'aAZegQY 3E
f1bhi /-6S{hl9Ne public class TestMethod { 8/z3=O& SuZ&vqS Z):n c% S public TestMethod() R3k1RE2c&g { ///xx/weblogic60b2_win.exe Ro2d,' try{ OD Ur SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7iJ&6=/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j@Yi`a(sdm SiteFileFetch fileFetch = new SiteFileFetch(bean); 0
ugT2% fileFetch.start(); FWH}j0Gj| } j3q~E[Mz\ catch(Exception e){e.printStackTrace ();}
E7Cy(LO +UJuB _C\[DR0n } =)O,`.M.Y 47r_y\U h g%u&Zkevx public static void main(String[] args) 56l@a{ { " P)*FT new TestMethod(); 8q`$y$06Dk } ^-FRTC } |[9?ma 点击下载更多相关资料
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