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/* &-<"HW **SiteFileFetch.java X$/3 */ GOJi/R.{ package NetFox; H!F'I)1 import java.io.*; -J[zJ4z# import java.net.*; aU^>kRGc gywI@QD%# 6i.'S5. public class SiteFileFetch extends Thread { [.6>%G1C JsnavI6 ]|u}P2 SiteInfoBean siteInfoBean = null; //文件信息Bean #Yw^n?~~ long[] nStartPos; //开始位置 [2i+f< long[] nEndPos; //结束位置 %T'?7^\> FileSplitterFetch[] fileSplitterFetch; //子线程对象 N#7 ]xL long nFileLength; //文件长度 + A0@#:B boolean bFirst = true; //是否第一次取文件 d.2b7q09 boolean bStop = false; //停止标志
)[p8 File tmpFile; //文件下载的临时信息 `yQHPN0/ DataOutputStream output; //输出到文件的输出流 wW%I < M "3\RJ?eW:S //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) X[@>1tl public SiteFileFetch(SiteInfoBean bean) throws IOException GGJ_,S* { K"}Dbr siteInfoBean = bean; \W= //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); GK&yP%Z3 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); UBqK$2
# if(tmpFile.exists ()) >E]*5jqU { g!~j
Wn?A bFirst = false; gKYn* read_nPos(); uXhp+q\ } +B8Ut{l else vnN_csJ#^ { Bs# #3{ylu nStartPos = new long[bean.getNSplitter()]; AP@xZ%;K nEndPos = new long[bean.getNSplitter()]; e. [+xOu` } aNqVs|H RLKO0 # J&3;6I
& 3M@>kIT8 } +uT=Wb \ W/\7m\B 66|lQE&n public void run() M
j5C0P( { L1F){8[ //获得文件长度 vo::y" //分割文件 {#[a4@B0 //实例FileSplitterFetch "Q/3]hc. //启动FileSplitterFetch线程 =pk'a_P8- //等待子线程返回 CC)9Ks\ try{ I*
bjE' if(bFirst) #5H@/o8!s= { VqbiZOZ@ nFileLength = getFileSize(); D>|:f-Z6Z if(nFileLength == -1) AGv;8'` { .s!:p pwl System.err.println("File Length is not known!"); v,M2|x\r} } t[Q^Xp else if(nFileLength == -2) +$UfP(XmH { 'P~ *cr ?A System.err.println("File is not access!"); 4;*V^\',9
} mD=?C else t&&OhHK { *,Re&N8 for(int i=0;i<nStartPos.length;i++) t%TZu>(1O { ^#=L?e nStartPos = (long)(i*(nFileLength/nStartPos.length)); H!Od.$ZIX } 8odVdivh for(int i=0;i<nEndPos.length-1;i++) HhpP}9P; { @i`gR% nEndPos = nStartPos[i+1]; w+MdQ@'5 } }`MO}Pz nEndPos[nEndPos.length-1] = nFileLength; o?b%L } ;T_9;RU<'b } AH7k|6ku<* fg1y@Dj/& p/:5bvA //启动子线程 S1+#qs{5a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .Gv~e!a8 for(int i=0;i<nStartPos.length;i++) 1z`,*eD7 { }UO,R~q~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D~y]d siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <N*>9S,} nStartPos,nEndPos,i); asF-mf;D Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <G&v fileSplitterFetch.start(); _4W#6! } srSTQ\l4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T9$U./69-L siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); kDz.{Ih // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", UP`q6]P nEndPos = " + nFileLength); $YC~02{ // fileSplitterFetch[nPos.length-1].start(); $e_ps~{7$ Wp]EaYt2D g|zK%tR_P //等待子线程结束 c[YjGx //int count = 0; ,qfa,O //是否结束while循环 o2|(0uN' boolean breakWhile = false; dL\8^L P$QjDu- <- ?B# while(!bStop) aE%VH ;? { _qg6(
X write_nPos(); %b?Pasf. Utility.sleep(500); &-*nr/xT breakWhile = true; k|_2aQ02 "4`%NA <oO,CXF for(int i=0;i<nStartPos.length;i++) G<z)Ydh_ { @Dy.HQ~ if(!fileSplitterFetch.bDownOver) O<3,n;56Z { wY95|QS breakWhile = false; d"78:+ break; 47 RY pd } q>[% C5 } :9#`|#uh if(breakWhile) Zb
2 break; J
v#^GNm Lm?*p>\Q G4}q*&:k //count++; wgyO% //if(count>4) V4-=Ni]k // siteStop(); ]R@G5d } V!P3CNK V9VP"kD
x.yL'J\) System.err.println("文件下载结束!"); *p3P\ H^5 } SSXS catch(Exception e){e.printStackTrace ();} d0B+syl&4l } eTc`FXw` v2{O67j}
o k~R[5W|' //获得文件长度 [FL I+;gY public long getFileSize() ,
.I^ekF { 2UF94 int nFileLength = -1; mc'p-orAf try{ ~D5MAEazS URL url = new URL(siteInfoBean.getSSiteURL()); ddP,_.0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `VsGa httpConnection.setRequestProperty("User-Agent","NetFox"); RuZ;hnE& DKl7|zG4 cnthtv+(~ int responseCode=httpConnection.getResponseCode(); 9ojhI=: if(responseCode>=400) gcxk'd { dmz3O(]$ processErrorCode(responseCode); YZl%JX return -2; //-2 represent access is error %?hLo8 } 6W=:`14 \2pFFVT
A232"p_ String sHeader; E5 oD|'=WA jyhzLu / yi :Q0 for(int i=1;;i++) a1SOC=.M; { BUinzW z{a //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); mj=|oIMwT //Utility.log(in.readLine()); <&:&qngg sHeader=httpConnection.getHeaderFieldKey(i); pXv[]v if(sHeader!=null) j\f$r,4 { ap^=CEf if(sHeader.equals("Content-Length")) ^gzNP#A<'o { fR4l4 GU?) nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &|}IBu :T break; J~3T8e# } )V3(nZY } 5iddB $ else r)(BT:2m break; DA)v3Nd } 6;frIl; } `?^w catch(IOException e){e.printStackTrace ();} ""3m!qn# catch(Exception e){e.printStackTrace ();} %8CT -mQ +esNwz_ 6bKO;^0 Utility.log(nFileLength); n/oipiYx *}ee"eHs xeM':hD.o return nFileLength; eD{ @0& } 7.
9s.* WG/J4H`Od M
|?p3% //保存下载信息(文件指针位置) =+}}Sv2 private void write_nPos() %;(|KrUN { 8V|jL?a~ try{ 4Sstg57x~ output = new DataOutputStream(new FileOutputStream(tmpFile)); QeeC2 output.writeInt(nStartPos.length); %}MA5 t]o for(int i=0;i<nStartPos.length;i++) K=Z]#bm { L\Fu']l // output.writeLong(nPos); O%K?l}e output.writeLong(fileSplitterFetch.nStartPos); _SIs19"lR output.writeLong(fileSplitterFetch.nEndPos); +GYMJK`S+ } G:c8`*5Q output.close(); 8#]7`o } )xvx6?Ah| catch(IOException e){e.printStackTrace ();} R^yZG{?t catch(Exception e){e.printStackTrace ();} _d[2_b1 } LlA`QLe rw8J:?0x nN=:#4
>Y //读取保存的下载信息(文件指针位置) pO/SV6N private void read_nPos() vbA7I<; { A2|o=mOH try{ ))IgB).3M DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =F%wlzF: int nCount = input.readInt(); kyx SIQ^ nStartPos = new long[nCount]; -[=AlqL nEndPos = new long[nCount]; d@6:|auO for(int i=0;i<nStartPos.length;i++) Dl zmAN { 1( ?CNW[ nStartPos = input.readLong(); !
[|vx!p nEndPos = input.readLong(); >2lAy:B5 } n4vXm input.close(); loeLj4"" } n=G>y7b catch(IOException e){e.printStackTrace ();} 53`9^|: catch(Exception e){e.printStackTrace ();} JMirz~%ib } 7"n)/;la vfJ3idvo*w r%y;8$/- private void processErrorCode(int nErrorCode) E+m]aYu" { xxLgC;>[ System.err.println("Error Code : " + nErrorCode); J-, H6u } hsHVX[<5` + q
#Xy0u S2'`|uI //停止文件下载 8K@"B public void siteStop() {+C %D' { ;&+[W(7Sy bStop = true; @ate49W for(int i=0;i<nStartPos.length;i++) $Yx6#m}[M fileSplitterFetch.splitterStop(); 1Lm].tq VY+(,\)U r/CEYEJ&X } C.yY8?| } di3 B=A>3 //负责部分文件的抓取 1u"R=D9p,= **FileSplitterFetch.java -+3be(u */ (orrX Ez package NetFox; %_B:EMPd n_""M:X H 1DEO3p import java.io.*; |8&-66pX import java.net.*; IWjR0 @9OeC
O CrnB{Z4L public class FileSplitterFetch extends Thread { 8- dRdQu] Cz'xGW{ w1wXTt String sURL; //File URL b@=zrhQ long nStartPos; //File Snippet Start Position r?64!VS; long nEndPos; //File Snippet End Position &mh Ln4^ int nThreadID; //Thread's ID _:wZmZU} boolean bDownOver = false; //Downing is over Bz~ -2#l boolean bStop = false; //Stop identical uz*d^gr} FileAccessI fileAccessI = null; //File Access interface wXc,F D$ wn
&$C0 yB-.sGu public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wENzlXeOP { CdX`PQ this.sURL = sURL; _FL<egK this.nStartPos = nStart; LWD. this.nEndPos = nEnd; C=>B_EO nThreadID = id; E;9Z\?P fileAccessI = new FileAccessI(sName,nStartPos);//定位
%)pP[[h } fucUwf\_ @(Z( /P;: {J{1`@ public void run() Xa4GqV9M/- { JYPxd~T/- while(nStartPos < nEndPos && !bStop) {5SfE$r { .FuA;:@%\ ,,S9$@R S2ark,sp6 try{ DYX-5~;! URL url = new URL(sURL); =KV@&Y^x4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0[.3Es:_ httpConnection.setRequestProperty("User-Agent","NetFox"); _HwpPRVP/ String sProperty = "bytes="+nStartPos+"-"; iu+3,]7Fm httpConnection.setRequestProperty("RANGE",sProperty);
KZ]r8 Utility.log(sProperty); FS8S68 5Yl6? G=1m]>I8 InputStream input = httpConnection.getInputStream(); s,w YlVYf! //logResponseHead(httpConnection); K${}r0 w}d}hI `Z:3`7c byte[] b = new byte[1024]; sv'
Gt1&"Z int nRead; KCD5*xH while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) P 4QkY#v { zHV|-R nStartPos += fileAccessI.write(b,0,nRead); `0?^[;[u[ //if(nThreadID == 1) i-,'.w // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); HM):" } x:qr \Rz 6%%PP8.F [yC"el6PM Utility.log("Thread " + nThreadID + " is over!"); Ae6("Oid bDownOver = true; _-/x;C //nPos = fileAccessI.write (b,0,nRead); W<Z$YWr } 9
Va40X1 catch(Exception e){e.printStackTrace ();} !_dR' } tn{8u7 } =5Wp&SM6 izf~w^/ JR)/c6j //打印回应的头信息 ,%Z&*n public void logResponseHead(HttpURLConnection con) xor TL8 { gfm;xT/y for(int i=1;;i++) q3)wr%!k5D { jN6b*-2
String header=con.getHeaderFieldKey(i); H}
6CKP} if(header!=null) ]\BUoQ7I/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); -;>#3O- Utility.log(header+" : "+con.getHeaderField(header)); EE]=f=3 else \TUE<<?1s break; 87<9V.s2 } 8R}K?+] } YjLe(+WQ z]$>+MH_ [4XC#OgA public void splitterStop() 0[)VO[ { x@m<Ym- bStop = true; E:w:4[neh } P"F{=\V1`< Q]rqD83(( ?'sXgo.} } Yj|]Uff8O /C$
xH@bb HabzCH /* 7Ms90oE/c **FileAccess.java iCrxV{ *//文件访问(定位,写) sx5r(0Z package NetFox; qVBL>9O*. import java.io.*; n+;vjVS% JMlV@t7y< hD
q2-X} public class FileAccessI implements Serializable{ }1U*A#aN7K }+0z,s~0. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @B`Md3$7 RandomAccessFile oSavedFile; os$nL'sq long nPos; ^u)rB<#BR xU}M;4kH~ f^9&WT public FileAccessI() throws IOException *eUc.MX6x { |nY~ZVTt/ this("",0); hNbIpi= } V=}1[^ eko]H!Ov( )a cV-+{ public FileAccessI(String sName,long nPos) throws IOException ?`AGF%zp
{ 6GINmkA oSavedFile = new RandomAccessFile(sName,"rw"); <>=mCZ2 this.nPos = nPos; 4D"4zp7 oSavedFile.seek(nPos); (oaYF+T } aB"xqh)a}T 'jvpNn 8S
U% public synchronized int write(byte[] b,int nStart,int nLen)
c Zvf"cIs { 2z\;Q8g){r int n = -1; $}tjS3klr try{ "C74 oSavedFile.write(b,nStart,nLen); s@!$='| n = nLen; R1%y]]*-P } `ZGcgO<c\ catch(IOException e) 'fY9a(Xt. { 9%!dNnUk e.printStackTrace (); vV^dm)? } ]b}B2F'n }htPTOy5 R^8{bP return n; $j*Qo/xd } IOEM[zhb$ `fS^
j-_M A';QuWdT } P}r)wAt \Tm}mAvK/o J(iV0LAZb /* 91d },Mq: **SiteInfoBean.java m,tXE%l */ 9UD
@MA package NetFox; NQLiWz-q "JT;gaEm 4/*q0M{}B public class SiteInfoBean { [m2+9MMl `X
-<$x -s"0/)HD private String sSiteURL; //Site's URL p538r[f< private String sFilePath; //Saved File's Path `ROG~0lN( private String sFileName; //Saved File's Name h-XY4gq/ private int nSplitter; //Count of Splited Downloading File Mv|!2 [: Ai kf|)D[ u"+}I,'L public SiteInfoBean() (tCib 4 {//nSplitter的缺省值为5 %ROwr[Dj= //default value of nSplitter is 5 @Icq1zb]
y this("","","",5); S; /. % } (S9f/i^ .eF_cD7v yrr)
y
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) >^SEWZ_[ { ' [p)N, sSiteURL= sURL; \l,rpVv5m sFilePath = sPath; a!,r46>$H sFileName = sName; $3;Upgv this.nSplitter = nSpiltter; f_\_9o"l Ix8$njp[ z2 hFn& } `_qK&&s UA-7nb <hvRP!~<) public String getSSiteURL() J;QUPpHZ { P:{<*`q return sSiteURL; 5<R%H{3j } I.V:q!4* K-Mc6 i[nF.I5*f public void setSSiteURL(String value) < bUe/m { ejePDgi_[ sSiteURL = value; vq'k|_Qi= } [EZYsOr. $g\&5sstE {1Eu7l-4 public String getSFilePath() wpo1
{ Q!'qC*Gyfn return sFilePath; GDhM<bVqM* } elO<a]hX W>-B [5O&[
4na8 public void setSFilePath(String value) x]4Kkpqm { Gi?_ujZR sFilePath = value; !@L=;1, } f~h~5 (K{5fC xvm5 public String getSFileName() h5~n 1qX { q31>uF return sFileName; SreYJT% } c$H+g,7xQ- p]gT&[iJ :E_a0!' public void setSFileName(String value) j,-C{ K { 2}WDw>V sFileName = value; {ERMGd6Jp } 1=)r@X/6d UT]?;o" -4 Ux,9& public int getNSplitter() "Ij I'c { AHbZQulC return nSplitter; mOBACTY^ } TwahR:T Jfhk@27T v/QUjXBr public void setNSplitter(int nCount) nWYCh7 { oh-|'5+,;h nSplitter = nCount; &xd.Qi2 } smy}3k } !!,0'c L^J-("e_ Y "jE' /* .zj0Jy8N **Utility.java E4%j. */ [
!%R#+o=F package NetFox; u'5`[U
-! 2Aq~D@,9=: N/F$bv public class Utility { h0 |}TV^UJ @4GA^h ][@F public Utility() 5er@)p_ { bud&R4+ .2:\:H~3 l]LxL } 4ne5=YY* 9<1F[SS<s9 //线程睡眠 TJ_=1Y@z public static void sleep(int nSecond) X`r*ob { V%ii3 try{ "M
H6fF Thread.sleep(nSecond); Qyh/ed/ } yW7'? catch(Exception e) l|`^*%W@u6 { Snw3`|Y~< e.printStackTrace (); !u|Tu4G^ } MmoR~~* } t%VDRZo7 ]`o!1( GA //日志 Ud%s^A-qS public static void log(String sMsg) =\kMXB { oOU1{[ System.err.println(sMsg); %:9oDK } Qst$S} n ^4Uw8-/ 9 X ]j)+DX> public static void log(int sMsg) A#@_V'a8 { Ub$n |xn System.err.println(sMsg); ,J=P,]( } hwnJE958L } YlK7;yrq( ]7 GlO9 #@.-B,] /* !X^Ce)1K **TestMethod.java qa'gM@] */ PR7f(NC package NetFox; >4i>C 1}m3; IVvtX} public class TestMethod { y0bq;(~X~
#=c`of6 ^q[gxuL_ public TestMethod() `FF8ie 8L { ///xx/weblogic60b2_win.exe D)b}f` try{ pHE}ytcT SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
Yc Q=vt{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); M!m?#xz'c SiteFileFetch fileFetch = new SiteFileFetch(bean); hlJpElYf fileFetch.start(); P.\nLE J= } wEft4o catch(Exception e){e.printStackTrace ();} cWAtju?L; ~W0(1#
i \1%l^dE@ } k) \gWPH ,?cH"@RJ 7N8H)X public static void main(String[] args) a|j%n { A&5:ATQ/| new TestMethod(); 5N7H{vT_ } D/(CU#i" } *#U+qgA;` 点击下载更多相关资料
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