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/* Cw;&{jY **SiteFileFetch.java k#"Pv" */ +LddW0h+=8 package NetFox; V#
Mw import java.io.*; lsmzy_gV7 import java.net.*; fq-$u;~h 7+]T}4; 1o)Vzv public class SiteFileFetch extends Thread { <jdS0YT T8Sgu6:*R 0_JbE SiteInfoBean siteInfoBean = null; //文件信息Bean "h.} o DS long[] nStartPos; //开始位置 |F5^mpU long[] nEndPos; //结束位置 W}B4^l FileSplitterFetch[] fileSplitterFetch; //子线程对象 AMqu}G long nFileLength; //文件长度 $s2Ty1 boolean bFirst = true; //是否第一次取文件 INwc@XB boolean bStop = false; //停止标志 .&2p Z File tmpFile; //文件下载的临时信息 8>q:Q<BB2 DataOutputStream output; //输出到文件的输出流
?PQiVL LnyA 5T //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Q@j:b]Y9 public SiteFileFetch(SiteInfoBean bean) throws IOException :-
5Mn3* { &a(w0< siteInfoBean = bean; /kWWwy<
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3&*%>) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1%:A9%O)t if(tmpFile.exists ()) .ev]tu2N { ;kF p)*i bFirst = false; M1>a,va8Zq read_nPos(); EXi+pm } +I~?8* else @6Mo_4)O { x-QP+M`Pu nStartPos = new long[bean.getNSplitter()]; DxD0iJ=W nEndPos = new long[bean.getNSplitter()]; 97g-*K } L7b{H2 2 *w6N& -|T^ >@|<1Fx| } ;K_B,@:' 2#[Y/p 0CR;t`M@ public void run() %In"Kh* { :({<"H)!' //获得文件长度 /6fPC;l //分割文件 6]3ZUH; //实例FileSplitterFetch =1(BKk> //启动FileSplitterFetch线程 `sXx,sV?B //等待子线程返回 ?|/}~nj7 try{ {V&7JZl,/ if(bFirst) |)_R
bqZ { ~_&.A* Jh nFileLength = getFileSize(); -$q/7,os if(nFileLength == -1) .s?OKy { 5zGj,y>u System.err.println("File Length is not known!"); :}z%N7T } d7P @_jO6 else if(nFileLength == -2) Yp)U'8{h c { ?uN(" I System.err.println("File is not access!"); {Vm36/a } rifxr4c[X> else D^{:UbN { YMd&+J` for(int i=0;i<nStartPos.length;i++) gK( 4<PO' { F~AS(sk nStartPos = (long)(i*(nFileLength/nStartPos.length)); .g~@e_;): } X
A|`wAGP for(int i=0;i<nEndPos.length-1;i++) (AYS>8O& { h~@+M5r, nEndPos = nStartPos[i+1]; h"ylpv+ } fz3*oJ' nEndPos[nEndPos.length-1] = nFileLength; >C[1@-]G%7 } 4:'] 'E } ^IH1@ hl:eF:'hm }v,THj //启动子线程 d@tr]v5 B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; nS4S[|w" for(int i=0;i<nStartPos.length;i++) 'qJ-eQ7e { id#k!*$7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D_19sN@0m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), K,C$J
I nStartPos,nEndPos,i); k.=S+#"} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ubw!/|mi fileSplitterFetch.start(); o~.o^0Y } n"<GJ.{ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K@j^gF/0B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); c]aK
N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ;/)Mcx] n nEndPos = " + nFileLength); */5<L99v // fileSplitterFetch[nPos.length-1].start(); fdq^!MWTi 6PQJgki JX\T
{\m# //等待子线程结束 10l1a4 //int count = 0; QC\g%MVG //是否结束while循环 rPo\Dz boolean breakWhile = false; {7Gx9( THbtu*El {Z?$Co^R while(!bStop) UU;-q_H6 { Lr24bv\ write_nPos(); hV>4D&< Utility.sleep(500); EYJ i6# breakWhile = true; A}#]g>L An8%7xa7 \\2k}TsB for(int i=0;i<nStartPos.length;i++) ,2
g M- { O'!r]0Q if(!fileSplitterFetch.bDownOver) M]4 =(Vv+5 { h[-d1bKwS breakWhile = false; =mi:<q break; i>]<*w } Av;q:x? } P+;CE|J`X if(breakWhile) B.Zm$JZ: break; veX"CY`hn z*dQIC e0~sUVYf //count++; 1o;g1Z/ //if(count>4) n2jvXLJq // siteStop(); r{_B: } ax72e hL} ~_l6dDJ ySixYt System.err.println("文件下载结束!"); y;{^Ln4{ } c9*1$~(v0I catch(Exception e){e.printStackTrace ();} ?x5wS$^q< } XoKO2<3 T<TcV9vM ~|r'2V* //获得文件长度 QX/X {h6 public long getFileSize() ?u_gXz;A { qLQ <1>u int nFileLength = -1; (b/A|hl try{ q3AJwELXw URL url = new URL(siteInfoBean.getSSiteURL()); ;0w ^ud HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fr}1_0DDz httpConnection.setRequestProperty("User-Agent","NetFox"); @)W(q5)}9" (kWSK:l C%}]"0Q1 int responseCode=httpConnection.getResponseCode(); sJ))<,e5I if(responseCode>=400) JQKC;p { ;ZQ-uz processErrorCode(responseCode); Awu$g. return -2; //-2 represent access is error ;y>S7n>n: } \#4m@ _iG2J&1'L )E'Fke String sHeader; >5)<Uv$ :ozV3`%$( QWrIa1.JC for(int i=1;;i++) yXJ]U
\ % { yJ!OsD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;B&^yj&; //Utility.log(in.readLine()); x(L(l=^" sHeader=httpConnection.getHeaderFieldKey(i); Iz
DG&c if(sHeader!=null) y }\r#"Z` { Og,Y)a;= if(sHeader.equals("Content-Length")) KAd_zkUA { >^a$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); t)YUPDQ@J break; `
^DjEdUN } "\e:h|
.G } _ Yfmxn8V else 3sH\1)Zz break; aF!E x } !; IJ } {Fbg]'FQ catch(IOException e){e.printStackTrace ();} =I2@/, catch(Exception e){e.printStackTrace ();} P?kx +a%xyD:.? z~,mRgc$B Utility.log(nFileLength); m6^ 5S 2d*_Qq1 [F+(^- ( return nFileLength; >OV<_(S4 } #ZJMlJ:q`" $B\ H i}v9ut]B //保存下载信息(文件指针位置) IV'p~t private void write_nPos() l3. { MaO"#{i try{ ;f:gX`"\ output = new DataOutputStream(new FileOutputStream(tmpFile)); OF[?Z output.writeInt(nStartPos.length); 69-:]7.g for(int i=0;i<nStartPos.length;i++) 4S|=/f { O gmSQ // output.writeLong(nPos); ad9CsvW output.writeLong(fileSplitterFetch.nStartPos); j(iuz^I output.writeLong(fileSplitterFetch.nEndPos); 4:7m K/Z }
.[?BlIlm output.close(); )tS-.P rA- } _T5)n=| catch(IOException e){e.printStackTrace ();} &SH1q_&BQ catch(Exception e){e.printStackTrace ();} _%~$'Hy } rAb&I"\ZY 3uV4/%U !4WEk //读取保存的下载信息(文件指针位置) r3qf[?3`6 private void read_nPos() *FK`&(B+} { y7:tr try{ P`S@n/} DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); w\Mnu}<e$ int nCount = input.readInt(); -Fxmsi nStartPos = new long[nCount]; tu0aD%C nEndPos = new long[nCount]; N>|XS
, for(int i=0;i<nStartPos.length;i++) PE"v*9k { n_Onr0EvO nStartPos = input.readLong(); WA6!+Gy nEndPos = input.readLong(); fuUm}N7 } Md,pDWb input.close(); A(8n } QJn`WSw$_- catch(IOException e){e.printStackTrace ();} u,1}h L catch(Exception e){e.printStackTrace ();} fY,|o3# } 3GH(wSv9\ L?5f+@0. kL>d"w private void processErrorCode(int nErrorCode) [q*%U4qGO { jZpa0g rA System.err.println("Error Code : " + nErrorCode); 9zBMlc$X }
X[](Kj^`< nXA\|c0 QAPu<rdJP //停止文件下载 g&Vcg` public void siteStop() `.%JjsD< { !ABiy6d bStop = true; rJJ[X4$ for(int i=0;i<nStartPos.length;i++) vUA0FoOp fileSplitterFetch.splitterStop(); Sv'y e l"(6]Z 4 #]]Su91BA } ]y@F8$D! } &fOdlQ? //负责部分文件的抓取 e:w&(is **FileSplitterFetch.java F_;DN:
{ */ l[GOs&D1 package NetFox; jS.g]k
\
%=9 F {+`uG import java.io.*; r?/A?DMe import java.net.*; TUIk$U?/I 1f'Hif*r_X Wg`AZ=t public class FileSplitterFetch extends Thread { `J0i.0p ^|!I+ c{+A J8 String sURL; //File URL }8-\A7T long nStartPos; //File Snippet Start Position ZR0r>@M3v< long nEndPos; //File Snippet End Position nH|,T% int nThreadID; //Thread's ID k S#
CEU7 boolean bDownOver = false; //Downing is over )B#
, boolean bStop = false; //Stop identical h#r^teui) FileAccessI fileAccessI = null; //File Access interface \2 y5_;O kq=V4-a[ FQz?3w&ia public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException a:,y
Z { ;`YkMS`=W this.sURL = sURL; <A5]]{9 + this.nStartPos = nStart; !4"^`ors$ this.nEndPos = nEnd; MPgS!V1 nThreadID = id; Ycr3HLJy fileAccessI = new FileAccessI(sName,nStartPos);//定位 {c?JuV4q? } lbdTQ6R H9)m^* "syh=BC
v public void run() p?D2)( { <*!i$(gn while(nStartPos < nEndPos && !bStop) U9y|>P\)T { JA)?p{j tR0pH8?e" z4#(Ze@u~_ try{ ?~"bR% URL url = new URL(sURL); GNf 482 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fWc|gq httpConnection.setRequestProperty("User-Agent","NetFox"); ;22l"-F String sProperty = "bytes="+nStartPos+"-"; CT9 httpConnection.setRequestProperty("RANGE",sProperty); 6lwta`2 Utility.log(sProperty); ]uj=:@ &3F}6W6A OO dSKf8 InputStream input = httpConnection.getInputStream(); L4u;|-znw //logResponseHead(httpConnection); aNn"X y\ k /M;#_+VK< aI(7nJ=R byte[] b = new byte[1024]; NcOPL\ int nRead; H=*5ASc while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) im} ?rY { {Gq*e/ nStartPos += fileAccessI.write(b,0,nRead); <ljI;xE //if(nThreadID == 1) s>k Uh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \Ng\B.IQ } *L6PLe PWRy7d GZS1zTwBL Utility.log("Thread " + nThreadID + " is over!"); Q|Y0,1eVp| bDownOver = true; Pg9hW //nPos = fileAccessI.write (b,0,nRead); d)cOhZy } f4-a?bp catch(Exception e){e.printStackTrace ();} XC 7?VE } TD[EQ } YjF|XPv+ l ^,l_{ _=ua6}Xp //打印回应的头信息 ^;,M}|<h public void logResponseHead(HttpURLConnection con) a?|vQ*W { *<N3_tx" for(int i=1;;i++) }+o:j'jB { MV_Srz String header=con.getHeaderFieldKey(i); 0]QRsVz+ if(header!=null) ETp%s{8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); y@2epY?{ Utility.log(header+" : "+con.getHeaderField(header)); j'[m:/ else ^ -FX break; aQ^umrj@?9 } )"f
N!9,F } 4'$g(+z ?D,=37 J
PyOG_h public void splitterStop() 1O].v&{ { 1Je9,dd6 bStop = true; /bj
<Ft\ } o"wXIHUmV M/x >51< ^7;JC7qmN } P%)gO 5@*'2rO&!
}:0uo5B7 /* (feTk72XX **FileAccess.java '$4O!YI9@ *//文件访问(定位,写) e%8|<g+n6 package NetFox; @
'@:sM_ import java.io.*; Y(cN}44 eh1Q7~ &//wSlL3 public class FileAccessI implements Serializable{ E_KCNn-f iAT)VQ& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8Ll[ fJZA RandomAccessFile oSavedFile; LIg{J% long nPos; + OV')oE R52I=
a5,* zF5uN:-s public FileAccessI() throws IOException Oj<S.fi { ["\;kJ. this("",0); 0]D0{6x8 } w9
w%&{j u77E! z4Uz vI$t+m: public FileAccessI(String sName,long nPos) throws IOException %| G"-%_E { hOhS) oSavedFile = new RandomAccessFile(sName,"rw"); M#|dIbns
H this.nPos = nPos; V\(:@0" oSavedFile.seek(nPos); pP(XIC } 8M@BG8 0%!rx{f#\ :xKcpY[{ public synchronized int write(byte[] b,int nStart,int nLen) + [Hh,I7 { GUsl PnG int n = -1; cb5,P~/q try{ 2Z20E$Cb oSavedFile.write(b,nStart,nLen); 42>Ge>#F n = nLen; Qt]Q:9I[ } e#/E~r& catch(IOException e) .9O$G2'oh { 1-.~7yC e.printStackTrace (); 9&RFO$WH } 29XL$v], ?FfC wP"dZagpj return n; Qr
Wj>uR } K't]n{$ bQ|V!mrN} 1s1=rZ! } 5U_H>oD <0S=,! RpLE
02U /* |yo\R{&6 **SiteInfoBean.java V.wqZ {G */ 64:fs?H package NetFox; $%VuSrZ& Qp`gswvE HHqwq.zIy public class SiteInfoBean { Gycm,Cy dg4vc][ Vf(6!iRP@ private String sSiteURL; //Site's URL Wu)>U private String sFilePath; //Saved File's Path tH'2gl private String sFileName; //Saved File's Name YJ(*wByM private int nSplitter; //Count of Splited Downloading File lsN~*q?~] 02BuX]_0g 'l,V*5L public SiteInfoBean() u^029sH6j {//nSplitter的缺省值为5 BB|?1"neg //default value of nSplitter is 5 1>L(ul(qGF this("","","",5); 4Vq%N } \@&_>us :x_'i_w TIvRhbu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }MUn/ [x { r H ~" 4 sSiteURL= sURL; F[ewn/]n sFilePath = sPath; NWxUn.Gy9 sFileName = sName; FZ8b7nJ)4m this.nSplitter = nSpiltter; |>z3E z BL&LeSa 7t.!lh5G% } G\TfL^A ?)e37 &>H!}"Yk public String getSSiteURL() 8b0d]*q { S;]*) i,v return sSiteURL; Pb*5eXk } ^U]UqX`
^eoLAL } (!EuLL public void setSSiteURL(String value) n@ G[ { "--t e sSiteURL = value; >3&O::]3 } d|4}obCt `O'`eY1f 4V~?. public String getSFilePath() "?mJqA { 2U-3Q]/I} return sFilePath; T9s2bC.z55 } @gG<le6 ES40?o*]x jbR0%X2 public void setSFilePath(String value) 2<}NB?f`N { |.wEm;Bz sFilePath = value; VsA'de!V4[ } WVLHfkN 1IVuSp`{FU tY
<Z'xA? public String getSFileName() xCtmXo { E}ZJ)V7 return sFileName; A2|Ud_ } )Y)pmjZaG xpOg8u5 i E CrI3s public void setSFileName(String value) ~/*MY { <\;#jF%V sFileName = value; o;?/HE%,[ } 85GKymz$P `:axzCrCfR hqRw^2F public int getNSplitter() 6"}?.E$ { be +4junf return nSplitter; +a*tO@HG } \G-KplKS &~W:xg(jN 3d|9t9v public void setNSplitter(int nCount) YQY%M>F@d% { 3$X'Y]5a nSplitter = nCount; HbW0wuI } QcpXn4/* } Xn{1 FJX/ o^
XtU5SVq 50={%R /* |DsnNk0c **Utility.java xt*u4% */ sM9+dh package NetFox; ^`G}gWBx}w l]5w$dded~ O?|gp<=d public class Utility { _8E/)M &%-73nYw N ,z6y5Lu public Utility() >vA2A1WhW { r-<F5<H+K@ IC7M$ [Vma^B$7Vj } )6aAB| r9dyA5oD //线程睡眠 ow]053:i public static void sleep(int nSecond) MNV%
=G { Gh}*q|Lz try{ ukUGvK Thread.sleep(nSecond); v\{!THCSh } ,S!azN= catch(Exception e) }+sT4'Ah> { Er{>p|n= e.printStackTrace (); GP#aya } 8e(\%bX } L+q/){Dd( >:b Q //日志 @/31IOIV]` public static void log(String sMsg) gN"7be&J { .p(T^ m2A* System.err.println(sMsg); is-7
j7; } *I0T{~ y_?Me] 5@BBoeG public static void log(int sMsg) {lc\,F* $ { hzvd t System.err.println(sMsg); `V04\05 } ^cuc.g)c$? } d}4Y( ZEx}$<)_ Ll4g[8 /* 5bgs*.s **TestMethod.java wY_)y */ _/tHD]um package NetFox; 9c("x%nLpB .P"D c(~[$)i6 public class TestMethod { T]c%!&^_ lx7Q.su' b"{'T]"*j public TestMethod() N=7pK&NHSG { ///xx/weblogic60b2_win.exe k-^mIJo} try{ 5f 5f0|ok SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #%h-[/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !/]WrGqbS SiteFileFetch fileFetch = new SiteFileFetch(bean); >: g3k fileFetch.start(); R)m'lMi| } \r+8qC[, catch(Exception e){e.printStackTrace ();} BNs@n"k ZNvEW "9Q40w\ } =D<PVGo9 Rw0qcM\>| 0a XPPnuX public static void main(String[] args) ]Yn_}Bq { SR|`! new TestMethod(); @/ohg0 } P&^;656r } wLnf@&jQ% 点击下载更多相关资料
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