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/* 7*@BCu6 **SiteFileFetch.java -NUA */ d+]/0J!c package NetFox; _FzAf5DO import java.io.*; e84O
6K6o import java.net.*; y)T|1) B1o*phM
g W"H(HA public class SiteFileFetch extends Thread { (
c +M"s F+/#ugI )@6iQ SiteInfoBean siteInfoBean = null; //文件信息Bean w5q'M long[] nStartPos; //开始位置 [ N0"mE< long[] nEndPos; //结束位置 Ha~}NO FileSplitterFetch[] fileSplitterFetch; //子线程对象 R@2*Lgxz~ long nFileLength; //文件长度 P=.T|l1 boolean bFirst = true; //是否第一次取文件 afye$$X boolean bStop = false; //停止标志 (
\7Yo^ File tmpFile; //文件下载的临时信息 B dxV [SF DataOutputStream output; //输出到文件的输出流 l:j>d^V*&x B1 xlWdm //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?'^yw C` public SiteFileFetch(SiteInfoBean bean) throws IOException dyt.(2 { )pw53,7>aN siteInfoBean = bean; uwu`ms7z 2 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); !$#8Z".{v{ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P.kf|,8L if(tmpFile.exists ()) `FAZAC\ { y>&
s; bFirst = false; iM~qSRb#mJ read_nPos(); #yOn / } f&?
8fB8{ else Gy!bPVe { h/7_I uD nStartPos = new long[bean.getNSplitter()]; Y"E*#1/ nEndPos = new long[bean.getNSplitter()]; ,ZvlKN } 2 P9{?Y rXVRX#Lh TJs ~}&L S=3 H.D!f } :CG;:( | >C -N0H kV$VKag*A public void run() DhT8Kh{ { -{Fy@$! //获得文件长度 jNW/Biy4u //分割文件 TlJ'pG 4^ //实例FileSplitterFetch +kT
o$_Wkz //启动FileSplitterFetch线程 Y|aaZ|+ //等待子线程返回 |],ocAN{ try{ jiP^Hz"e
if(bFirst) eI+p { HQ^:5XH nFileLength = getFileSize(); o_PQ]1 if(nFileLength == -1) D>K=D" { :{~TG]4M System.err.println("File Length is not known!"); <ugy-vSv } tFX!s;N[ else if(nFileLength == -2) WP4"$W { X,`e1nsR System.err.println("File is not access!"); O:+?:aI@ } cT#R B7 else WR}<^ax { sF1j4 NC for(int i=0;i<nStartPos.length;i++) P;ovPyoO { $%"~.L4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); JvM:x y9 } E 7"`D\* for(int i=0;i<nEndPos.length-1;i++) MzIn~[\ { :tX,`G nEndPos = nStartPos[i+1]; {\ J%i|u } JmbWEX| nEndPos[nEndPos.length-1] = nFileLength; =7-@&S=?s } d.p%jVO)" } E~1"Nh cB}6{c$_sW H`NT`BE //启动子线程 6='x}Qb \H fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #)( D_* for(int i=0;i<nStartPos.length;i++) pxHJX2 { iTJE:[W"y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vSGvv43G siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), S0tPnwco[~ nStartPos,nEndPos,i); B q7Qbj Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g UA_&_ fileSplitterFetch.start(); [u7i)fn5? } W.TdhJW9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), myDcr|j-a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); L*1yK* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", </|m^$v nEndPos = " + nFileLength); b!z kQ?h // fileSplitterFetch[nPos.length-1].start(); >e QFY^d5 HI{IC!6 nmUMg //等待子线程结束 )"f*Mp //int count = 0; wQN/MYF[ //是否结束while循环 /t_AiM,( boolean breakWhile = false; xRm~a-rp B^"1V{M p$l'y""i while(!bStop) xoN?[ { \Wf1b8FW write_nPos(); ![{0Yw
D Utility.sleep(500); S"Drg m. breakWhile = true; <CGJ:% AY N3?hu} #~6au6LMC for(int i=0;i<nStartPos.length;i++) 5U<;6s { \mDBOC0eK if(!fileSplitterFetch.bDownOver) BVv{:m{w { l&uBEYx breakWhile = false; N_f>5uv break; 9NausE40 } =J^FV_1rJ } v42Z&PO
if(breakWhile) L'<.#(| break; d`4F U t.#h=" 'Sjt*2blq //count++; Y%@a~| //if(count>4) vABUUAo!Jr // siteStop(); zfm#yDf } &``nYI g/ utBKl'` @;h$!w< System.err.println("文件下载结束!"); 3}2a3) } %q_b\K catch(Exception e){e.printStackTrace ();} qp55U* } 6Wc'5t3 ~a`
vk@8 4>t=r\"4 //获得文件长度 HHg[6aw public long getFileSize() ?7R&=B1g { eTZ2f int nFileLength = -1; {Zrf>ST try{ Gw?$.@L'I6 URL url = new URL(siteInfoBean.getSSiteURL()); e6uVUzP4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FlepM* httpConnection.setRequestProperty("User-Agent","NetFox"); S~Yu; n_Bi HMIU' MUvgmJsN int responseCode=httpConnection.getResponseCode(); 7r wNjY# if(responseCode>=400) &,C;_3
{ m$B)_WW processErrorCode(responseCode); dn:/8~B"X return -2; //-2 represent access is error 3Tz~DdB } D4\
*
,w Q(h/C!rKe M 3c String sHeader; 9hdz<eFL |J^$3RX s!WI:E7 for(int i=1;;i++) |!"qz$8fB { Ygfv? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); _q3|Ddm2LN //Utility.log(in.readLine()); %S]g8O[}nl sHeader=httpConnection.getHeaderFieldKey(i); wvlM( if(sHeader!=null) q,*([yX { }WEF*4B! if(sHeader.equals("Content-Length")) c<]~q1 { lbiMB~rwI nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); y(*#0fJrTV break; .yb=I6D;<3 } dIOiP\^ } n0tVAH'> else
+z?SKc break; H:_R[u4r } c,_??8 } to#N>VfD catch(IOException e){e.printStackTrace ();} fE,Io3 catch(Exception e){e.printStackTrace ();} 0=V
-{ Jj,fdP#\ hvOl9W> Utility.log(nFileLength); I#9q^,,F i'`[dwfS L2\NTNY return nFileLength; OGn-~
#E } 4$_:a?9 p@jwHlX @szr '&\%A //保存下载信息(文件指针位置) J0,;F9<C#X private void write_nPos() gMUCVKGf { TI}Y U try{ q@Oe} output = new DataOutputStream(new FileOutputStream(tmpFile)); *PF=dx<8 output.writeInt(nStartPos.length); {`=k$1 for(int i=0;i<nStartPos.length;i++) D);w)` { J3,m{%EtNM // output.writeLong(nPos); n5;>e& output.writeLong(fileSplitterFetch.nStartPos); #D|n6[Y'.t output.writeLong(fileSplitterFetch.nEndPos); E>Lgf&R#W } mk]8}+^. output.close(); BSHtoD@e7 } [LDY;k~5+ catch(IOException e){e.printStackTrace ();} Q+a"Z^Z| catch(Exception e){e.printStackTrace ();} [ %6(1$Ih } :FX|9h O7lFg;9c` a+PVi //读取保存的下载信息(文件指针位置) @"__2\ 0 private void read_nPos() Q Zv}\C-c { /[+%<5s try{ y{Vh?Z<E DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /nB|Fo_&Q int nCount = input.readInt(); B<oBo&uA nStartPos = new long[nCount]; ^vha4<'-qG nEndPos = new long[nCount]; LZ<^b6Dxk for(int i=0;i<nStartPos.length;i++) ]oxi~TwY^ { 0Ait7` nStartPos = input.readLong(); M*2
Nq=3 nEndPos = input.readLong(); (Fs{~4T } J+r:7NvZ input.close(); %3@-.= } tZan1C%p> catch(IOException e){e.printStackTrace ();} <BjrW]pM catch(Exception e){e.printStackTrace ();} ][`% vj9r } E_T!|Q. @^Yr=d ba p,7,
tx private void processErrorCode(int nErrorCode) \@m^w"Ij { :s>x~t8g#n System.err.println("Error Code : " + nErrorCode); C@{-$z) } IQeiT[TF qrufnu5cC HMmB90P` //停止文件下载 iB#*XJ;q public void siteStop() lb\VQZp!y { 4Be\5Byr bStop = true; DhD^w;f] for(int i=0;i<nStartPos.length;i++) D";@)\jN fileSplitterFetch.splitterStop(); ^]MLEr!S ~DP_1V? bk:mk[ } OTzuOP8 } +F+M[ef<ws //负责部分文件的抓取 ,-[z?dvO **FileSplitterFetch.java 45;ey }8 */ %
Ou'+A package NetFox; xQkvK=~$ a!B"WNb+ bXk(wXX import java.io.*; Dvm[W),(k import java.net.*; |dhKeg_ :f~qt%%/ }/2M?W0 public class FileSplitterFetch extends Thread { # p2`9o *" +u^ %S/?Ci String sURL; //File URL 1P?|.W_^1 long nStartPos; //File Snippet Start Position Z}S7%m long nEndPos; //File Snippet End Position J?C:@Q int nThreadID; //Thread's ID u=t.1eS5 boolean bDownOver = false; //Downing is over qyP={E9A boolean bStop = false; //Stop identical ZlP+t> FileAccessI fileAccessI = null; //File Access interface MI)v@_1d U=PTn(2 ^@^K
<SVc public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `T{'ufI4B { $4q$!jB5 this.sURL = sURL; G`RQl@W>)( this.nStartPos = nStart; ; Vpp1mk| this.nEndPos = nEnd; "3/&<0k nThreadID = id; )3k?{1: fileAccessI = new FileAccessI(sName,nStartPos);//定位 us+z8Mz } JJK-+a6cX bvS6xU-
J ?AK`M #M public void run() J4u>77I { </2 aQn while(nStartPos < nEndPos && !bStop) O L 9(~p { " =6kH, )]kxLf# Whe-()pG{ try{ 9g]%}+D URL url = new URL(sURL); <Xw\:5
F<7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FLXn%/ httpConnection.setRequestProperty("User-Agent","NetFox"); &x7iEbRs String sProperty = "bytes="+nStartPos+"-"; F^81?Fi. httpConnection.setRequestProperty("RANGE",sProperty); >wb Uxl%{5 Utility.log(sProperty); E+lr{~ Jv} &8D ?tA%A InputStream input = httpConnection.getInputStream(); f-p$4%( //logResponseHead(httpConnection); -iKoQkHt 5Dzf[V^]` $ ^@fV=e byte[] b = new byte[1024]; 3&mpn, int nRead; Ft38)T"2R\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Lv#0-+]$Bt { mm;sf nStartPos += fileAccessI.write(b,0,nRead); w!'y,yb% //if(nThreadID == 1) .N( X.C // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `]^W#6l } n'0r
( > l]Ble Ft?eqDS1 Utility.log("Thread " + nThreadID + " is over!"); RLZfXXMn bDownOver = true; |<'6rJ[i> //nPos = fileAccessI.write (b,0,nRead); [>t;P, } ]|tR8`DGZ% catch(Exception e){e.printStackTrace ();} `][vaLd`Q } h,n}=g+? } .+kg1=s S`$%C=a. x-]:g&5T //打印回应的头信息 t+_\^Oa) public void logResponseHead(HttpURLConnection con) D|ra ;d { (cyvE}g for(int i=1;;i++) 6l[v3l"t { `So/G String header=con.getHeaderFieldKey(i); +(PUiiP'"v if(header!=null) h8X[*Wme //responseHeaders.put(header,httpConnection.getHeaderField(header)); XwFTAaZ Utility.log(header+" : "+con.getHeaderField(header)); .]s? 01Z else >]8(3&zd break; s1h|/7gG } %P D}VF/Y } uVKe ?~RC `S0`3q}L3% _QEw=*.< public void splitterStop() qoOwR[NDcq { .$7RF!p bStop = true; /
g{8 } _VVq&t} _",<at l i)6^f# } L""ZI5J{F9 J]#rh5um Z,O*p,Gzn /* FzcXSKHV% **FileAccess.java H(gY= *//文件访问(定位,写) I;-Y2* package NetFox; oyr b.lu/ import java.io.*; Q4_r) &np o$eCd{HuX ^lt2,x public class FileAccessI implements Serializable{ c?e-2Dp( YoW)]n //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 URs]S~tk RandomAccessFile oSavedFile; ox%j_P9@: long nPos; AH :uG# e4,SR(O> f;Oh"Yt public FileAccessI() throws IOException "[!b5f3!I { 'tY(&& this("",0); +<.o,3 } LRts
W(A/ qB (Pqv #>("(euXMF public FileAccessI(String sName,long nPos) throws IOException f}"eN/T { 3>^]r jFw oSavedFile = new RandomAccessFile(sName,"rw"); 2|=hF9
this.nPos = nPos; 3qn_9f ] oSavedFile.seek(nPos); B}[f]8jrM } &R?`QB2/ l cHf\~ ZnRT$ l O public synchronized int write(byte[] b,int nStart,int nLen) >mX6;6FF { 5{oc int n = -1; }oA>0Nw$K try{ ) WbWp4 oSavedFile.write(b,nStart,nLen); C1e@{> n = nLen; ]95VMyN } `BK b60 catch(IOException e) "gJ.mhHX { NIVR;gm e.printStackTrace (); Ht4O5yl" } Yj1|]i5b X=KW
> ^)?Wm,{"w return n; [#mkTY } N|$9v{ j_ ~ HhB@G!3 #Zw:&'
QB } Bh'fkW3 :MY=Q]l :>JfBJ]| /* P*BRebL: **SiteInfoBean.java lYCvYe */ -f&vH_eK package NetFox; !5(DU~S*@S 4pf@.ra,
,AweHUEn public class SiteInfoBean { d}zh.O5P!
w(&EZDe \.}T_,I private String sSiteURL; //Site's URL XQ9W
y private String sFilePath; //Saved File's Path V%s7*`U private String sFileName; //Saved File's Name )f|`mM4DW! private int nSplitter; //Count of Splited Downloading File +1YEOOfVY OyVP_Yx,V Lo1ySLo$G public SiteInfoBean() ;W|NG3_y {//nSplitter的缺省值为5 XDJE]2^52? //default value of nSplitter is 5 6T'UWh0S this("","","",5); =DJ:LmK } EN\cwa#FU ,\iHgsZ 0 (wu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (Fon!_$: { KCyV |,+n sSiteURL= sURL; sdZ$3oE. sFilePath = sPath; BP@tI| sFileName = sName; P?/JyiO} this.nSplitter = nSpiltter; JkWhYP } ?LmeZ}K wDh]vH[ } ;&O?4?@4 p"p~Bx a%B&F|u public String getSSiteURL() wpM2{NTP { __'4Qt return sSiteURL; 4F|79U # } @d0f +9d 7/IL"
D Q}@t' public void setSSiteURL(String value) xyL)'C { B#S8j18M sSiteURL = value; 0fXMY-$I } NUYKMo1ze (Of6Ij? W+!UVUpW public String getSFilePath() AE}cHBwZE { o'$"MC+ return sFilePath; ]6^<VC`5D } {IJ;)<>&VE YUEyGhkMV{ ESRj<p%W public void setSFilePath(String value) &~P4yI;, { 1OMXg=Y sFilePath = value; Gy/w #4xj } uKP4ur@1 FSA%,b;U y<Q"]H.CkQ public String getSFileName() uVn"L:_ { Ahwi return sFileName; sWo`dZ\6WB } |ZH(Z}m '-%1ILK$3r .@,t}:lD public void setSFileName(String value) UmWXv#q\l { /%& d: sFileName = value; dR]-R/1| } kP%hgZ UA8hYWRP losqc *| public int getNSplitter() (p%|F` { pz
/[${X return nSplitter; 7?=^0?a } XG.[C> V+"%BrM '%rT]u3U public void setNSplitter(int nCount) p3U)J&]c6 { Rsfb?${0G nSplitter = nCount; M9W
zsWM } r&E gP } =%7drBo D nXRa_M(z8 L5FOlzn /* k)n
b<JW|r **Utility.java 6#+&/ "* */ 9Y,JYc# package NetFox; GP%V(HhN }N[X<9^Z zkRAul32| public class Utility { Z&n[6aV'F (&e!u{I D!o[Sm}JO[ public Utility() fIoc)T { 4$KDf;m@ ]#]Z]9w !Ap5Uwd } xx`YBn~" *lSu=dk+ //线程睡眠 LIcc0w3 public static void sleep(int nSecond) [LnPV2@e { Vn^GJ'^ try{ 0P5VbDv$r7 Thread.sleep(nSecond); A7X
a } $yASWz catch(Exception e) f=l/Fp}4UH { +^Xf:r`
G e.printStackTrace (); bZYayjxZ5i } ZG^<<V$h } ]
]U )wg .#QE*<T)] //日志 @A1f#Ed< public static void log(String sMsg) $t;:"i> { 7~XC_Yc1 System.err.println(sMsg); Z`tmuu } 1jg* DQ7L YcobK#c t<8)h8eW public static void log(int sMsg) MIZdk'.U { G]ek-[- System.err.println(sMsg); {1SsHir> } xfb .Z( } G+<XYkz* 0*XsAz1,9 +LRKS /* be8T<F **TestMethod.java 0/su` */ H@uu;:l<7A package NetFox; |E1U$,s~u DJ"PP5d ,m# public class TestMethod { ni ?k' \\ ;A,X,f
T>B'T3or public TestMethod() dkw.o.e { ///xx/weblogic60b2_win.exe D0\>E}Y E try{ <,)R`90_X6 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,&UKsrs_ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); a dqS.xs SiteFileFetch fileFetch = new SiteFileFetch(bean); ,->K)Rs ; fileFetch.start(); So&gDR;b } /"Vd( K2Z catch(Exception e){e.printStackTrace ();} XjN4EDi+E KmNnW1T |HmY`w6*z } V;%ug'j _;k<=ns(= ,H{9`a#+: public static void main(String[] args) ,4Q4{Tx { RzqgN*]lY new TestMethod(); -hXKCb4YU } T aS1%( } F{ %*(U 点击下载更多相关资料
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