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/* &@v<nO- **SiteFileFetch.java L{8;Ud_2r */ $_D6_|HK package NetFox; 6f)2 F<
7 import java.io.*; 0CAa^Q^w import java.net.*; qp p/8M M \D]ml~ ;inzyFbL= public class SiteFileFetch extends Thread { p_2pU)% D WiBG
2oVV'9;B SiteInfoBean siteInfoBean = null; //文件信息Bean _P7tnXww long[] nStartPos; //开始位置 1S:|3W long[] nEndPos; //结束位置 SJ?)%[(T FileSplitterFetch[] fileSplitterFetch; //子线程对象 #VGjCEeU long nFileLength; //文件长度 }-DE`c boolean bFirst = true; //是否第一次取文件 06mlj6hV boolean bStop = false; //停止标志 K@u&(} File tmpFile; //文件下载的临时信息 m:+8J,jW DataOutputStream output; //输出到文件的输出流 gfa[4
z Q2|p\rO //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _\8qwDg"#e public SiteFileFetch(SiteInfoBean bean) throws IOException Pbu{'y3J { v?:: |{ siteInfoBean = bean; kH948<fk3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9X}I> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G"dS+,Q if(tmpFile.exists ()) J
CGC { Y&.UIosWb bFirst = false; {b)~V3rsY read_nPos(); )2e#HBnH } qu|i;WZE else ,h]o> { 'UU\4M nStartPos = new long[bean.getNSplitter()]; e}yX_Z'P< nEndPos = new long[bean.getNSplitter()]; Vw{*P2v) } g);^NAA hJ;$A*Y B 0ee?VC 'gMfN } ]wVk+%e YT#3n ]lO h&Cz[ public void run() /+]s.V. { s
+s" MI //获得文件长度 C.Uju`3 //分割文件 pB:$lS //实例FileSplitterFetch b~m2tC=AW //启动FileSplitterFetch线程 ) c2_b //等待子线程返回 1bnBji try{ J^#:qk if(bFirst) iq$$+y, { ,m3e?j@;r nFileLength = getFileSize(); PmpNAVE' if(nFileLength == -1) z+{,WHjo { / |r' System.err.println("File Length is not known!"); .="bzgC3A } 9!',b>C6 else if(nFileLength == -2)
!YL..fb { XOP"Px@ System.err.println("File is not access!"); / ~%KVe } .Pndx%X9s else Jju#iwb { r=uN9ro for(int i=0;i<nStartPos.length;i++) o{qr!*_3 { [Nm4sI11 nStartPos = (long)(i*(nFileLength/nStartPos.length)); Sjj>#}U } =8Jfgq9E for(int i=0;i<nEndPos.length-1;i++) :M3oUE{ { dUrElXbXd nEndPos = nStartPos[i+1]; ||7x;2e } LW6ZAETyL nEndPos[nEndPos.length-1] = nFileLength; y9H%
Xl } <xpph
t< } ZUm?*.g\^ \>. LW9 1/+C5Bp* //启动子线程 {$D,?V@%_ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >et-{(G for(int i=0;i<nStartPos.length;i++) *iO u' { en S}A*Io fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s8"8y`u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {P%9 nStartPos,nEndPos,i); u7%D6W~m0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IY'=DePd fileSplitterFetch.start(); `>Tu|3%\ } hg.#DxRi{ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CvSIV7zYo siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?Ea;J0V // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", j l.p'$Fbn nEndPos = " + nFileLength); f
3V Dv9( // fileSplitterFetch[nPos.length-1].start(); z
/KK)u(q 5^<h}u9 \uqjs+ //等待子线程结束 tsOrt3 //int count = 0; MB^~%uZ2K //是否结束while循环 C&LBr| boolean breakWhile = false; +Mewo P9Yy9_a|x 8
;d$54
b while(!bStop) {'sY|lou { N[]Hc write_nPos(); 1d"Z>k:mn Utility.sleep(500); T3UMCqc= breakWhile = true; zLs|tJOVp @+vXMJ $ >WJf=F`_H for(int i=0;i<nStartPos.length;i++) K5ZC:Ks { l:0s2 if(!fileSplitterFetch.bDownOver) ;7]u!Q { 5,qj7HZF breakWhile = false; _R'Fco break; ZRxZume<f
} 00I}o%akO } Ars687WB if(breakWhile) s4Sd>D7 break; ^'CPM6J Xp\/YJOibd OMhef,,H //count++; h^,8rd //if(count>4) 1wzqGmjmt // siteStop(); E#J';tUQ } Wt)Drv{@ { 'w>_+jLT #/"8F O%~p System.err.println("文件下载结束!"); WV3|?,y]qm } F|Mi{5G% catch(Exception e){e.printStackTrace ();} ZUz ^!d } Re:jVJgBz 6:GTD$Uz. PWh^[Rd) //获得文件长度 1c3TN#|)W public long getFileSize() >_rha~ { 9I1tN int nFileLength = -1; 8h3=b[ try{ P71 ( URL url = new URL(siteInfoBean.getSSiteURL()); IdYzgDH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ] h-,o
R?e httpConnection.setRequestProperty("User-Agent","NetFox"); q)H1pwxD u p.Q>28r l Z#o+d2Y int responseCode=httpConnection.getResponseCode(); lzw3= H if(responseCode>=400) ,NnhHb2\ { sK{l 9 processErrorCode(responseCode); +iRq8aS_
return -2; //-2 represent access is error .Ha'p. } A+y ;\EiM;Q] WZOY)>K String sHeader; l"\~yNgk mj|)nOd j4?@(u9;j for(int i=1;;i++) q@b|F- { \V9Z#> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -.g|l\ //Utility.log(in.readLine()); NCxqh < sHeader=httpConnection.getHeaderFieldKey(i); RoCfJ65 if(sHeader!=null) 0|R# Tb;Y { iXyO(w4D if(sHeader.equals("Content-Length")) 91Uj}n% { J]m{b09F nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); z0|&W&&D break; O+%WR } W@yJAQ } $P1O>x>LIL else N`)$[&NG] break; b-3*Nl _% } TKk-;Y=N } qwIa?!8o catch(IOException e){e.printStackTrace ();} 4iW'kuK catch(Exception e){e.printStackTrace ();} D:Q
21Ch IbcZ@'RSw )tCX
y4 Utility.log(nFileLength); -n'F v@U )c l5B{1P Zy|Mz& return nFileLength; sp@E8G%xO } ,K:ll4{b
#gm)dRKm% kId
n6 Wx, //保存下载信息(文件指针位置) A
AHt218 private void write_nPos() J8Yd1.Qj { `%09xMPu try{ mhW-J6u* output = new DataOutputStream(new FileOutputStream(tmpFile)); )'*5R <# output.writeInt(nStartPos.length); 9-]i.y for(int i=0;i<nStartPos.length;i++) w8g,a]p { ^F:k3,_[ // output.writeLong(nPos); DE2a5+^ output.writeLong(fileSplitterFetch.nStartPos); rP!#RzL output.writeLong(fileSplitterFetch.nEndPos); ]7;\E\o } 0* /{4)r output.close(); BTM),
w2 } `/HUV&i"S catch(IOException e){e.printStackTrace ();} WM)-J^)BJ catch(Exception e){e.printStackTrace ();} :ss,Hl } XUuu-wm:} 97K[(KE ljKrj //读取保存的下载信息(文件指针位置) a>mm+L8y private void read_nPos() C&++VRnm { ~rjTF! try{ C/(M"j M DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); z>w`ZD}XY int nCount = input.readInt(); N)&4Hy nStartPos = new long[nCount]; >DPB!XA3 nEndPos = new long[nCount]; OgF+OS for(int i=0;i<nStartPos.length;i++) jE#O>3+. { H3Se={5h\A nStartPos = input.readLong(); 5e
sQ; nEndPos = input.readLong(); *xp\4;B
} }E`dZW*!! input.close(); G;f/Tch } d|T!v catch(IOException e){e.printStackTrace ();} <cA/<3k) catch(Exception e){e.printStackTrace ();} E*?<KZe" } \6;=$f/?t 4mn&4e y>*xVK{D private void processErrorCode(int nErrorCode) S$2b>#@UJ { K(XN-D/c System.err.println("Error Code : " + nErrorCode); 8u!"#S#>a }
&YDK (&> JsO
*1{6g "bDs2E+W //停止文件下载 d~h:~ public void siteStop() >a3p >2 { V5 U?F6 bStop = true;
vSonkJ_ for(int i=0;i<nStartPos.length;i++) ={hX}"*D fileSplitterFetch.splitterStop(); JoSJH35=: nI0[;'Hn, ZylJp8U } (|wz7AY2 } QM?#{%31 //负责部分文件的抓取 7bDHXn **FileSplitterFetch.java fvb=#58N_ */ tl'n->G>v package NetFox; C{2xHd/* m! U9m oA1a /[# import java.io.*; "(qw-kil import java.net.*; fr!Pj(Q1 jF[ 1za U\rh[0 public class FileSplitterFetch extends Thread { y,pZTlE N?X~ w < |pa$*/!NT String sURL; //File URL uytE^ long nStartPos; //File Snippet Start Position Et_V,s<| long nEndPos; //File Snippet End Position 0| ;
.6\ int nThreadID; //Thread's ID K!,<7[MBg boolean bDownOver = false; //Downing is over S.!UPkW H boolean bStop = false; //Stop identical :$+-3_oLMQ FileAccessI fileAccessI = null; //File Access interface @|'5n S(:l+JP t20PP4FWM public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^*\XgX { a6kV!,.U this.sURL = sURL; <'G~8tA%v this.nStartPos = nStart; Xv@SxS-5l this.nEndPos = nEnd; UJs$q\#RO nThreadID = id; c)0amM fileAccessI = new FileAccessI(sName,nStartPos);//定位 {)AMw q } 4~U'TE
@ jmg!Ml pKS
{ 6P public void run() {-BRt)L[ { f3|@|'
; while(nStartPos < nEndPos && !bStop) fqu}Le { \n9zw' l]<L [Y,E- vy,&N^P try{ $)H@|<K URL url = new URL(sURL); ,YhdY6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
y<C<_2 httpConnection.setRequestProperty("User-Agent","NetFox"); cQ:"-!ff String sProperty = "bytes="+nStartPos+"-"; gT/@dVV httpConnection.setRequestProperty("RANGE",sProperty); n[YEOkiG Utility.log(sProperty); yz2Ci0Dwy :iR \% !gnj]k&/c InputStream input = httpConnection.getInputStream(); |j3'eW&= //logResponseHead(httpConnection); 0j(M*
sl <5=JE*s$NS /*Qq[C byte[] b = new byte[1024]; XlI!{qj| int nRead; R}mn*h6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^s.V;R { mZIoaF>t nStartPos += fileAccessI.write(b,0,nRead); n&MG7`]N //if(nThreadID == 1) e?bYjJq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 76.{0c } ET];%~ ^ &uUo3qXQ5l >yJ9U,Y Utility.log("Thread " + nThreadID + " is over!"); ~XeFOMq bDownOver = true; *Ei|fe$sa //nPos = fileAccessI.write (b,0,nRead); 0q\7C[R_ } `"@ X.}\ catch(Exception e){e.printStackTrace ();} m`6Yc:@E } W(RF n`g\ } Xtq{% ?X?&~3iD% (6v(9p //打印回应的头信息 0b91y3R+ public void logResponseHead(HttpURLConnection con) (Toq^+`c { e"r)R8 for(int i=1;;i++) `]Bxn)b( { D|qk_2R% String header=con.getHeaderFieldKey(i); Z`3ufXPNlO if(header!=null) 1{_A:<VBl //responseHeaders.put(header,httpConnection.getHeaderField(header)); HyiFy7j Utility.log(header+" : "+con.getHeaderField(header)); .}')f;jH5< else !se0F.K break; W0jZOP5_.$ } 7kKy\W } L}#0I+Ml7 0N=X74 YC]L)eafo` public void splitterStop() ~7!7\i,Y8\ { v&FF|)$ bStop = true; w#i[_ } ;d$qc<2uA VGL#!4wK ~"Gf<3^y+ } d7Ur$K\=y 1xf=_F0`& \n0Oez0z!B /* Cc?TSZ8[ **FileAccess.java l:]Nn%U(> *//文件访问(定位,写) ?t@v&s package NetFox; B~'MBBD" import java.io.*; 0:KE@= e$c?}3E!z 2fIRlrA$ public class FileAccessI implements Serializable{ (eCFWmO ECa$vvK
m //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9s
+z B RandomAccessFile oSavedFile; hgRVwX long nPos; 8&"(WuZ@ ;jK#[*y }_QKJw6/" public FileAccessI() throws IOException f^e6<5gdf { ^5=UK7e5KY this("",0); sM1RU } EPW7+Ve c':ezEaC Y<\^7\[x public FileAccessI(String sName,long nPos) throws IOException 'cDx{? { cD1o"bq oSavedFile = new RandomAccessFile(sName,"rw"); &$`hQgi this.nPos = nPos; {+zJI-XN/ oSavedFile.seek(nPos); *5$&`&, } AgF5-tz6x +)nT|w45 iV.p5FD public synchronized int write(byte[] b,int nStart,int nLen) .'[/|4H { ,G^[o,hS int n = -1; v}J;ZIb try{ i54md$Q^ oSavedFile.write(b,nStart,nLen); ^C&+
~+ n = nLen; z41_oG7 } yj@tV2 catch(IOException e) M4Z@O3OIE { !}3,B28 e.printStackTrace (); P];JKE% } u%O-;>J f<y&\'3 09M;}4ev&7 return n; o7&4G$FX~ } BdbJ< Is FqA3{ i`%. } ;)DzCc/ z}}]jR\y? ]Gc3Ea;4 /* g(0;[#@ **SiteInfoBean.java P2n2Qt2 */ MrE<vw@he package NetFox; Ni[4OR$-O UkR3}{i -7'#2P<) public class SiteInfoBean { 9CUimZ #:3r4J%+~ %IpSK 0<Sp private String sSiteURL; //Site's URL <2 private String sFilePath; //Saved File's Path ?BCy J private String sFileName; //Saved File's Name MBk"KF private int nSplitter; //Count of Splited Downloading File #`GbHxd }wt%1v-10U >e5zrgV public SiteInfoBean() o}8{Bh^ {//nSplitter的缺省值为5 t\j!K2 //default value of nSplitter is 5 0rMqWP this("","","",5); .")b?#K } PB~_I= &yH#s
8^8 nR5bs;gk" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]>:^d%n,} { ;np_%?is sSiteURL= sURL; i8V0Ty4~N sFilePath = sPath; ]S8LY.Az5 sFileName = sName; n~z\?Y=* this.nSplitter = nSpiltter; G=M] 8+h !awh*Xj6 Oo%!>!Lt, } 3
%(Y$8U EHf)^]Z sV0Z public String getSSiteURL() l%"`{ { <4F7@q,V return sSiteURL; xi {| } }F{=#Kqn^ &>}.RX]t ;cSGlE | public void setSSiteURL(String value) MUof=EJg>u { +}!DP~y+ sSiteURL = value; M|CrBJv+F } . A<sr +80 2`eax iV)ac\ public String getSFilePath() UC9{m252 { !y vJpdsof return sFilePath; p?myuNd[ } q@ Kk\m @[r ={s\ dt-K public void setSFilePath(String value) QJ<[Zx { n! .2aq sFilePath = value; t!l%/$- } :4;S"p <%!J? .:0M+Jr" public String getSFileName() Z*bC#s? { me. /o(!? return sFileName; 2,AaP*, } D3?N<9g Qyj(L[K J .w'vD/q; public void setSFileName(String value) R`He^ { _@prmSc sFileName = value; /_OOPt=G } atnQC ('WY5Yps D9^7m
j?e public int getNSplitter() Z\!rH"8 { *( *z|2 return nSplitter; 7Dl%UG] } <ZrFOb hPPB45^ kME^tpji public void setNSplitter(int nCount) rA#s { G.ud1,S# nSplitter = nCount; IIP.yyh> } 2Guvze_bU } <|JU(B A70(W{6a9@ _<u;4RO(s /* >-<F) **Utility.java Yq0# #__ */ X8b#[40: package NetFox; {bTeAfbf] n#>5?W `cO|RhD@ public class Utility { no3Z\@% cj^bh &|z|SY]DL public Utility() 8*)4"rS { Doj(.wm~ :)LC gIQo 66dTs,C } ;Id"n7W I7b i@t //线程睡眠 7sguGwg) _ public static void sleep(int nSecond) N(7u],(Om { 8bbVbP try{ `$Kes;[X Thread.sleep(nSecond); _FFv#R*4 } -$ali[ catch(Exception e) ! OfO:L7- { paYz[Xq e.printStackTrace (); ^?sSx!:bZ } V g6S/- } !=knppY @SQceQfB //日志 R_9 o!sTZ public static void log(String sMsg) =SL^>HS.fo { S| "TP\o System.err.println(sMsg); PHl4 vh#E! } uH]
m]t XC}1_VWs :3gFHBFDj public static void log(int sMsg) (k#t}B[ { * 2%oZXF System.err.println(sMsg); [U']kt } pLJeajv)z } ^@N`e1 5E.vje{U; U5clQiow /* iW-t}}Z>B **TestMethod.java Y)v% */ Hq-v@@0 * package NetFox; i2U/RXu E]?2!)mgce d~,n_E$q; public class TestMethod { YOlH*cZtg $WJy?_c iI}nW public TestMethod() @M9_j{A { ///xx/weblogic60b2_win.exe R1~7F{FW try{ BMF3XcH~G SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ',%5mF3j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); MKe *f% SiteFileFetch fileFetch = new SiteFileFetch(bean); I'P.K| "R fileFetch.start(); P1e5uJkd } ~"\P~cg0J catch(Exception e){e.printStackTrace ();} .;j"+Ef y
"<JE<X . *Z#cq0 } F-i&M1\_ 78gob&p? eNivlJ,K|@ public static void main(String[] args) <%(f9j { i'9eKO new TestMethod(); 7~L|;^( } %va[jJ } U<|B7t4M 点击下载更多相关资料
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