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/* Xpa;F$VI **SiteFileFetch.java v:vA=R2 */ ^X_%e | package NetFox; W&*{j;e9%I import java.io.*; t4JGd)r import java.net.*; J,q: ^L'K?o
<<A@69"4n public class SiteFileFetch extends Thread { JN8k x;@ s0`uSQ2X @lJGdp SiteInfoBean siteInfoBean = null; //文件信息Bean oZ8SEC"] long[] nStartPos; //开始位置 AG9U2x long[] nEndPos; //结束位置 =*(d+[_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 xQD#;
7 long nFileLength; //文件长度 G's/Q-'[\ boolean bFirst = true; //是否第一次取文件 D~%cf boolean bStop = false; //停止标志 )q=1<V44d File tmpFile; //文件下载的临时信息 JRo{z{!O6 DataOutputStream output; //输出到文件的输出流 V,Gt5lL&/! aI\VqOt] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) O{dx+f public SiteFileFetch(SiteInfoBean bean) throws IOException 2N]y)S_<V { Ny~;"n siteInfoBean = bean; JZ c5U}i //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); M.128J+xfS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); -S|L+">=Z if(tmpFile.exists ()) ,{oANqP { d3![b 1 bFirst = false; 5(F!*6i> read_nPos(); :J<S-d= } \e=@h!p else P_?1Rwm-45 { [lnN~#(Y nStartPos = new long[bean.getNSplitter()]; t4<#k= nEndPos = new long[bean.getNSplitter()]; QHQj6] } %
,X(GwX "TxXrt%>A d6L(Q(:s 62zlO{ >rJ } kO5KZ;+N- lS,Hr3Lz c'(]n]a% public void run() J
L Z { \Js9U|lY //获得文件长度 =X1$K_cN //分割文件 t=pG6U //实例FileSplitterFetch #uH1!UQb //启动FileSplitterFetch线程 HD`%Ma
Yhc //等待子线程返回 hyBSS,I try{ ; w+A38N$J if(bFirst) ;WzT"yW)T { j`#|z9`(pB nFileLength = getFileSize(); H,?MG if(nFileLength == -1) : i(h[0 { :Ert57@l System.err.println("File Length is not known!"); Wm\f:|U5` } `"bm Hs7 else if(nFileLength == -2) ())|x[>JS+ { oZ=e/\[K System.err.println("File is not access!"); G>!"XK:fB } Lr+2L_/v` else 7f(UbO@BD { QvqBT for(int i=0;i<nStartPos.length;i++) ~+d]yeDrhx { i|=XW6J% nStartPos = (long)(i*(nFileLength/nStartPos.length)); cvC;QRx } Npu;f>g0_ for(int i=0;i<nEndPos.length-1;i++) :2?'mKa7 { %TR->F nEndPos = nStartPos[i+1]; q)%C| } /TB_4{ nEndPos[nEndPos.length-1] = nFileLength; 6^wiEnA } C
:e 'wmA } 2z-&Ya Qu YGNX+6Lz zxj!ihs< //启动子线程 dXOjaS# ~ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {6KU.'#iF for(int i=0;i<nStartPos.length;i++) 5 i#B?+Y { Y<|L|b6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9sRP8Nj| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?,Hk]Rl3 nStartPos,nEndPos,i); -x RsYYw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UIyOn` d " fileSplitterFetch.start(); |M0TG } *Lufz-[1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `t8e2?GH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6qw_ |A&g // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", aTPpE9Pa& nEndPos = " + nFileLength); vCi:cIp/ // fileSplitterFetch[nPos.length-1].start(); d }]b k"n#4o: \t1vYIY]T //等待子线程结束 Ig6s'^ //int count = 0; pGOS'.K%t8 //是否结束while循环 %+'&$ boolean breakWhile = false; UM#]olh B(>_.x#kv }??q{B@v while(!bStop) ~L1N1Z)Kk { p@^2.O+ write_nPos(); jLEU V Utility.sleep(500); =N3~2=g~A breakWhile = true; Mr&]RTEE gNO$WY^ ;Lu}>.t for(int i=0;i<nStartPos.length;i++) 9\"~ G) { Mc\lzq8\ 1 if(!fileSplitterFetch.bDownOver)
&hF>}O { mg3jm breakWhile = false; iffU}ce break; E O}(MXS } p3Gj=G } L,:U _\HQ if(breakWhile) Ea3tF0{ break; G{s ,Y^ M0]fh5O 11)~!in //count++; H37Z\xS //if(count>4) ?Jma^ S // siteStop(); q!7\`>.2:{ } kC#;j=K? v<-D>iJ |UBJu `% System.err.println("文件下载结束!"); ROfmAc } .Kv@p jOr catch(Exception e){e.printStackTrace ();} O}%=c\Pb } <Q8bn?Z NR3IeTd )-sEm`(`I9 //获得文件长度 eygyVhJ public long getFileSize() ES+&e/G"ds { @.gCeMlOf int nFileLength = -1; .)o5o7H try{ 'IgtBd|K> URL url = new URL(siteInfoBean.getSSiteURL()); a@X'oV`(2b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); LRmO6>y httpConnection.setRequestProperty("User-Agent","NetFox"); |n~v_V2.0 TX
87\W. @<AIPla int responseCode=httpConnection.getResponseCode(); '|+_~ZO*d if(responseCode>=400) =GpLlJ`- { mHhm~u processErrorCode(responseCode); ]A\n>Z!; return -2; //-2 represent access is error {!="PnB } %? g]{ {7;TQ?/ |;].~7^ String sHeader; Lf,gS*Tg? 44]ae~@a $~2Ao[ for(int i=1;;i++) Fb*;5VNU. { _,'UP>Si //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); m1cyCD //Utility.log(in.readLine()); 7z$+ *]9- sHeader=httpConnection.getHeaderFieldKey(i); v:+se6HY?p if(sHeader!=null) 4SOj>(a# { ]F_u if(sHeader.equals("Content-Length")) S !e0: { ]f\rB8k|& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o 1b#q/ break; 8=e\^Q+ } z4<h)hh"k6 } A76=^iw else R:fu n, break; O=mJ8W@ } i44`$ps } >,y QG+ catch(IOException e){e.printStackTrace ();} c[YC}@l%a catch(Exception e){e.printStackTrace ();} Xak~He c]O4l2nCL Rbl(oj# Utility.log(nFileLength); U-Iwda8v J|>P,x#G _Ih~'Y Fd return nFileLength; abK/!m[q } B^OhL!*tI IQ|~d08} t]m#k%) //保存下载信息(文件指针位置) b
:+
X3 private void write_nPos() B>'\g
O\2 { C2VZE~U+ try{ i^W\YLE output = new DataOutputStream(new FileOutputStream(tmpFile)); .d*v fE$ output.writeInt(nStartPos.length); g,1\Gj%y for(int i=0;i<nStartPos.length;i++) _7;#0B { ru U| // output.writeLong(nPos);
#8(@a
Y output.writeLong(fileSplitterFetch.nStartPos); ugL$W@ output.writeLong(fileSplitterFetch.nEndPos); C{,nDa?| } d9^h
YS{ output.close(); `Ffn:=Do } 8<o(z'&y catch(IOException e){e.printStackTrace ();} mT9TSW} catch(Exception e){e.printStackTrace ();} R{WG>c } $`riB$v ^yfT7050 ](O!6_'d //读取保存的下载信息(文件指针位置) 0 8U:{LL private void read_nPos() F!Uk `[L { .z9JoQ try{ #A|MNJ%m DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Axcm~!uf int nCount = input.readInt(); i\3`?d nStartPos = new long[nCount]; R` N-^x nEndPos = new long[nCount]; B EY}mR] for(int i=0;i<nStartPos.length;i++) )S5Q5"j&=f { U2h?l
`nP nStartPos = input.readLong(); LsmC/+7r$1 nEndPos = input.readLong(); YS/DIH{9e } <?I~ + input.close(); 1M+mH#? } ^,rbA>/L catch(IOException e){e.printStackTrace ();} m!PN1$9V catch(Exception e){e.printStackTrace ();} h qxe } m=#2u4H4 ptsi\ 7BG tIRw"sz private void processErrorCode(int nErrorCode) BeVQ[ { a~{mRh System.err.println("Error Code : " + nErrorCode); r..Rh9v/=E } HWc=.Qq 8'f:7KF *f,EDSN1@d //停止文件下载 +DU}f;O8v public void siteStop() 8J@REP4 { jbG #__#_ bStop = true; .<tb*6rX> for(int i=0;i<nStartPos.length;i++) VbZZ=q=Kd fileSplitterFetch.splitterStop(); :*\JJ w ?{+}gS^ Bq\%]2;eo{ } ? 1_*ct=g9 } khyVuWN
//负责部分文件的抓取 y0z}[hZ **FileSplitterFetch.java jPFA\$To */ U/TF,JUI package NetFox; yJ?4B?p( d#A.A<p* T]0qd^\4w import java.io.*; +.zriiF]i import java.net.*; RCsd +H+OYQ>^ 9 /0<Z_b2 public class FileSplitterFetch extends Thread { [5,#p$R 7q(RQQp >y2gfD String sURL; //File URL O>}aK.H long nStartPos; //File Snippet Start Position 3Hr ZN+D long nEndPos; //File Snippet End Position p6sXftk int nThreadID; //Thread's ID ]r|X[9 boolean bDownOver = false; //Downing is over SkS
vu} boolean bStop = false; //Stop identical Id9hC<8$dq FileAccessI fileAccessI = null; //File Access interface teET nz_L N 0`)WLW 2'N%KKmJL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException X\uN:;?#W{ { l].dOso$` this.sURL = sURL; O,hT<
s " this.nStartPos = nStart; VBy=X\w] this.nEndPos = nEnd; V:yia^1 nThreadID = id; \]GBd~i< fileAccessI = new FileAccessI(sName,nStartPos);//定位 j]YS(Y@AY
} >+&524xc lNqYpyvy* xMU4Av[{ public void run() =r#of|`Q { \y{C>!WX4 while(nStartPos < nEndPos && !bStop) @/7tN3O { eR =P Hh,q)(Wo ]^E<e!z={$ try{ g&X$)V4C URL url = new URL(sURL); 4y:yFTp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |&3[YZY httpConnection.setRequestProperty("User-Agent","NetFox"); y&UcTE2;%( String sProperty = "bytes="+nStartPos+"-"; N<9CV!_ httpConnection.setRequestProperty("RANGE",sProperty); R9^Vk*`gFU Utility.log(sProperty); RYy_Ppn96f +AO(e A-qdTJP InputStream input = httpConnection.getInputStream(); pm@Mlwg`1 //logResponseHead(httpConnection); zcy!YB >]s|'HTxF QT&2&#Z byte[] b = new byte[1024]; +q6/'ErN]m int nRead; A+_361KH while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
GMr jZ { B&VruOP0 nStartPos += fileAccessI.write(b,0,nRead); ~4<xTP\* //if(nThreadID == 1) >2tYw,m // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); VMZ\9IwI } ~#C7G\R 9-5H~<}fF 4v_<<l Utility.log("Thread " + nThreadID + " is over!"); wL\OAM6R bDownOver = true; "@#^/m) //nPos = fileAccessI.write (b,0,nRead); Rq|7$O5 } >;LXy catch(Exception e){e.printStackTrace ();} M2l0x @| } 'H0uvvhOp } k+t?EZ6L j KGfm9|zj [vrM,?X //打印回应的头信息 ;=fOyg public void logResponseHead(HttpURLConnection con) \oA>%+]5 { 3rBSwgRl for(int i=1;;i++) gY|f[M| { \!x~FVA String header=con.getHeaderFieldKey(i); ~=67#&(R if(header!=null) bnIl@0Y //responseHeaders.put(header,httpConnection.getHeaderField(header)); &e0BL z Utility.log(header+" : "+con.getHeaderField(header)); m&a.i
B else W US[hx, break; qr~P$ } Jz<-B } 98'/yZ g0O~5.f F>RL&i public void splitterStop() piULIZ0 { ])`w_y(> bStop = true; %Ya%R@b} } W8,4LxH 42]hX9E ;UUpkOQO( } `ECY:3"$KA {%Cb0Zh Vq-W|<7C= /* <hkSbJF **FileAccess.java ]ie38tX$ *//文件访问(定位,写) B>C+qj@ package NetFox; =S+*=j A import java.io.*; Z(F['Zf [ICFPY6 1K{u>T public class FileAccessI implements Serializable{ IyK^` y Is&0h| //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8z1#Q#5 RandomAccessFile oSavedFile; WVZ](D8Gc] long nPos; [`J91= lDsT?yHS`Z X(_xOU)V public FileAccessI() throws IOException O2{~Q{p { ddK\q!0 this("",0); iq1HA.X( } .bYZkO:oy /{Mo'.=Z 03pD< public FileAccessI(String sName,long nPos) throws IOException <fSWX>pR { aW=c.Q. oSavedFile = new RandomAccessFile(sName,"rw"); @I"&k!e<2 this.nPos = nPos; 0{Uc/ oSavedFile.seek(nPos); Eqizx~e qq } pKZRgA#kN RW-)({ Lh@0|k public synchronized int write(byte[] b,int nStart,int nLen) c~``)N { f4 k int n = -1; e'I/}J try{ (/gv
U80 oSavedFile.write(b,nStart,nLen); cV$an n = nLen; $Z|HFV{ } FP=up#zl catch(IOException e) ,ArHS { qPQ6`rD\ e.printStackTrace (); Nwwn #+ } )fy-]Ky
* r{ >`" f`<elWgc" return n; 2x5^kN7 } (n{x"rLy/ z`}z7e'> 6.Jvqn } &zR\Rmpt _ sqj~|K &L[i"1a /* 9epMw-)k **SiteInfoBean.java /9pN.E */ Yj CH KI"e package NetFox; o;TS69|D VQ"Z3L3-4 J8'1 ~$6 public class SiteInfoBean {
?kIyo "hmLe(jo} '@/1e\ -y private String sSiteURL; //Site's URL -1{f(/ private String sFilePath; //Saved File's Path 'Z*`~,Q private String sFileName; //Saved File's Name +0ALO%G;G" private int nSplitter; //Count of Splited Downloading File Tbp;xv_qo v!`:{)2C &HQ_e$1 public SiteInfoBean() $PstEL {//nSplitter的缺省值为5 ?:tk8Kgf //default value of nSplitter is 5 %lk^(@+ T this("","","",5); DFkDlx } bN\;m^xfu u\{MQB{T {^D; ($lm public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z+Guu8 { v,'k2H sSiteURL= sURL; ;kI)j
? sFilePath = sPath; 4Ei8G]O
$_ sFileName = sName; t[r6 jo7 this.nSplitter = nSpiltter; Sa[?B =X1oB,W{ !,+<?o y } `w&?SXFO8 z:a7)z ]]o?!NX public String getSSiteURL() Kf-XL),3l { O3V.4tp return sSiteURL; ZO!h!2* } F
EUfskv AGl#f\_^ /X]gm\x7s public void setSSiteURL(String value) s~QIs { 7Ll?#eun sSiteURL = value; Q45gC28x } QQ`tSYgex m@Dra2Cv'@ o~<jayqU public String getSFilePath() D<hX%VJ%M { TMGYNb%<bX return sFilePath; ihJ!]#Fbm } \gu8 ~zK 2n+ud ?|l w\mT ug public void setSFilePath(String value) mGDy3R90 { 8.G<+. sFilePath = value; R$!]z( } [+d~He 4{Q$^wD+. W__Y^\~ public String getSFileName() ?0'e_s { *LMzq9n3o return sFileName; =0L%<@yA } `YUeVz>q? _&(L{cFx6 b*W,8HF 4, public void setSFileName(String value) 7;c^*"Ud { d~MY
z6" sFileName = value; |"PS e~ u } GSs?!BIC V?Q45t Ae 4X",:B} public int getNSplitter() ,Ne9x\F { (t){o>l return nSplitter; # >I_ } :@@`N_2? =jKu=!QPq 15VvZ![$V public void setNSplitter(int nCount) W\($LD"X { Yecdw'BW? nSplitter = nCount; {sxdDl } )3A+Ell` } eIy:5/s fs yVu|G w_V A:]j4 /* <& 3[|Ca **Utility.java [ #ih
o(/ */ fN@ZJ~F%j package NetFox; P*i'uN Zn0a)VH%
KWeE!f 7G public class Utility { AFM+`{Cq -[J4nN &N T{2)d]Y public Utility() </Y(4Xwf= { #6
ni~d&0 $IS!GS&: J5{ } Wuo:PX'/9 #'},/Lm@ //线程睡眠 qO38vY){ public static void sleep(int nSecond) lxCAZa\ { FaWDAL=Vhk try{ 4s~X Thread.sleep(nSecond); ;w+ } +*xc4 catch(Exception e) r`"T{o\e { %sPze] e.printStackTrace (); wd32q7lGo1 } j^;P=L0= } N@Oe[X8 <7>1Z
82) //日志 Yyar{$he public static void log(String sMsg) vNs`UkA { p;'.7_1 System.err.println(sMsg); Kxa1F,dZ } }Xk_
xQVt{ Sk"hqF.2 ~QlF(@ue public static void log(int sMsg) #AP;GoIf"j { Z m%,L$F*L System.err.println(sMsg); $=,pQ q } vE8BB$D } 7QnWw0 mA$86 X_ 1=5HQ~|[TO /* Z9NND **TestMethod.java si)>:e */ Nd"IW${Kg package NetFox; *!TQC6b$ @%*2\8}C! !s^XWsb8 public class TestMethod { z. X
hE \ M9o/6 fzw:[z:% public TestMethod() X `EVjK { ///xx/weblogic60b2_win.exe bM5V=b_H try{ k0N>J8y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); po'b((q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 1<Mb@t SiteFileFetch fileFetch = new SiteFileFetch(bean); < qab\M0W fileFetch.start(); ]P#W\LZp } :!Dm,PP% catch(Exception e){e.printStackTrace ();} :*h1ik4t K?[Vz[-Fc KAD2_@l } h,B4Tg' AG}j'
BfCM\ij public static void main(String[] args) ,`Z4fz: { gE$Uv*Gj new TestMethod(); rr2!H%: } <`" } z/h]Jos 点击下载更多相关资料
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