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/* &>Vfa **SiteFileFetch.java c}0@2Vf */ ,f&5pw
= package NetFox; [2Ud]l:6E import java.io.*; ;{[.Zu import java.net.*; y.Z?LCd< fS`$'BQ 42qYg(tZ public class SiteFileFetch extends Thread { 'R:"5d NG6& :4! .AU)*7Gh SiteInfoBean siteInfoBean = null; //文件信息Bean ',S'.U long[] nStartPos; //开始位置 JGQj w(Xs long[] nEndPos; //结束位置 *H|M;G FileSplitterFetch[] fileSplitterFetch; //子线程对象 d0,s"K7@ long nFileLength; //文件长度 ~JH:EB: boolean bFirst = true; //是否第一次取文件 _hk.2FV:3m boolean bStop = false; //停止标志 T'b_W,m~,u File tmpFile; //文件下载的临时信息 =*LS%WI DataOutputStream output; //输出到文件的输出流 %x}
O1yV f^.AD- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #KiRfx4G public SiteFileFetch(SiteInfoBean bean) throws IOException E^SH\5B { 'Un" rts siteInfoBean = bean; x>Jr_A( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); v 7x:dcV tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AoI/n4T^ if(tmpFile.exists ()) Ny%(VI5: { RnDt)3 bFirst = false; +PuPO9jKO@ read_nPos(); 9\DQ>V TQ } _zwUE else ` 5C~ { 9uQ 4u/F nStartPos = new long[bean.getNSplitter()]; $
<#KA3o\ nEndPos = new long[bean.getNSplitter()]; X7g1:L1Ys }
({=gw9f [bk?!0]aV
7?%k7f [`):s= FC } n .RhxgC< #*(td<Cp ksN+?E4w public void run() bG(3^"dS { ZKckAz\# //获得文件长度 O~^" //分割文件 k4[|'Dk? //实例FileSplitterFetch w2'f/ //启动FileSplitterFetch线程 +qwjbA+ //等待子线程返回 lh;:M-b9 try{ KSNPkd6 if(bFirst) %GS(:]{n { TBT:/Vfun nFileLength = getFileSize(); z21|Dhiw& if(nFileLength == -1) `p;I} { O|M{-) System.err.println("File Length is not known!"); ]&pds\ } >\Ww;1yV else if(nFileLength == -2) EG=Sl~~o { T]=r Co System.err.println("File is not access!"); -u8NF_{c } vG"=h% else 6'Worj { 4Q6mo/=H for(int i=0;i<nStartPos.length;i++) _`:1M2= { EpX&R,Rxk nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0p!>JQ]m } #a8B/- for(int i=0;i<nEndPos.length-1;i++) :1bWVM) { VeQg-#&I nEndPos = nStartPos[i+1]; !74S } :dQ B R nEndPos[nEndPos.length-1] = nFileLength; 8;+B*+%@n } +yD`3`
E } $NZ-{dY{ 8Y7Q+p|O m~-K[+ya`D //启动子线程 +w{*Xk)4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; m4l&
eEp for(int i=0;i<nStartPos.length;i++) &b%zQ4%d-` { Z*= $8e@ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Lja>8m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), j+uLV{~g6 nStartPos,nEndPos,i); yU-e3O7L Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [VsKa\9u fileSplitterFetch.start(); ~ijVmWNk } B=^)Ub5' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hUp.tK:X7o siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !FElW`F // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [k;\S XDZo nEndPos = " + nFileLength); w"cZHm // fileSplitterFetch[nPos.length-1].start(); IV\'e} %~2YE U$WxHYo //等待子线程结束 |6K+E6H //int count = 0; @c;|G$E@3 //是否结束while循环 J:V6 boolean breakWhile = false; 5',8 ziJQ )W;o<:x3 4;0lvDD while(!bStop) iiS-9>]/ { ]);%wy{Ho write_nPos(); Hn%xDJ' Utility.sleep(500); (2^gVz=j breakWhile = true; 2[O&NdP\Zk ~l]ve,W[ {pnS Q for(int i=0;i<nStartPos.length;i++) 3@M|m<_R$ { { +
Zd*)M[ if(!fileSplitterFetch.bDownOver) Pa
V@aM~3 { `\#B18eU breakWhile = false; `OXpU,Z 6U break; B1>/5hV} } 8TLgNQP } g" .are'7 if(breakWhile) IDB+%xl#S break; 2ZG5<"DQ" [f1
(`< |yQZt/*SOZ //count++; I+[>I=ewa //if(count>4) ->y J5smtY // siteStop(); V@cM |( } $m].8? ;>?rP88t {MCi<7j<? System.err.println("文件下载结束!"); +zaA,e?\ } w35J.zn catch(Exception e){e.printStackTrace ();} ifUGY[ L } i+S)
K Jrti
cK$ QxVq^H //获得文件长度 QLEKsX7p> public long getFileSize() BGD8w2 { [<g?WPCcC int nFileLength = -1; Mn2QZp4 try{ s;S?;(QI URL url = new URL(siteInfoBean.getSSiteURL()); 1 u| wMO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %|g>%D3Z? httpConnection.setRequestProperty("User-Agent","NetFox"); #h8Sq~0 v/68*,z[ zr+zhpp int responseCode=httpConnection.getResponseCode(); q)S^P> if(responseCode>=400) *W0y: 3dB3 { l_P-j96WD processErrorCode(responseCode); G-xDN59K return -2; //-2 represent access is error Y^8C)p9r } e;Ti&o} a(kg/s aY'C%^h] String sHeader; #{?PbBE} >/kcdWl Ljxz.2LGr for(int i=1;;i++) u37'~&o{U { 4C<jdv_J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &]e'KdXF //Utility.log(in.readLine()); "?ucO4d sHeader=httpConnection.getHeaderFieldKey(i); !;i`PPRwk if(sHeader!=null) Ox&P}P0f { 8+a4>8[M if(sHeader.equals("Content-Length")) s \;" X { \`oT#|0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 0B@SN)<kH break; /y _O4 } %{AO+u2i } 01r 8$+ else 8$85^Of break; zVXC1u9B } Ir`eL } /<@SFF. catch(IOException e){e.printStackTrace ();} *c~T@m~DR catch(Exception e){e.printStackTrace ();} a`&f { /K.3 WN{ 9 Utility.log(nFileLength); cik!GA "!Uqcay- x(hE3S#+ return nFileLength; YQ+tDZY8` } iVp,e
z.$4!$q ,k{#S?:b //保存下载信息(文件指针位置) (i34sqV$m private void write_nPos() F~%]6^$w { u
[m try{ ,uo'c_f(e output = new DataOutputStream(new FileOutputStream(tmpFile)); ?EJD?,} output.writeInt(nStartPos.length); ??PC
k1X for(int i=0;i<nStartPos.length;i++) dx;Ysn0- { IE;~?W" // output.writeLong(nPos); _hRcc"MS` output.writeLong(fileSplitterFetch.nStartPos); f!oT65Vmi output.writeLong(fileSplitterFetch.nEndPos); %+8F'&X } P_?gq>E8 output.close(); ';TT4$(m } b8V~S'6VqO catch(IOException e){e.printStackTrace ();} tZ}
v%3 catch(Exception e){e.printStackTrace ();} Gb8D[1=u= } c_-drS jNLw= @y='^DQ* //读取保存的下载信息(文件指针位置) >TOu|r private void read_nPos() UUzYbuS>&l { 4]h
=yc R try{ D2](da:]8) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $nb[G$ int nCount = input.readInt(); (8Bk;bd nStartPos = new long[nCount]; HG+%HUO$ nEndPos = new long[nCount]; "OQ^U_ for(int i=0;i<nStartPos.length;i++) +Vm}E0Ov { r G4';V^q nStartPos = input.readLong(); *pAV2V(!23 nEndPos = input.readLong(); *
mOo@+89 } @\|_ input.close(); |+iws8xK? } k.uMp<)D catch(IOException e){e.printStackTrace ();} JHz
[ 7 catch(Exception e){e.printStackTrace ();} S/D^ } @!`Xl*l k p<OJy (iL|Sq&}b private void processErrorCode(int nErrorCode) Z @^9PQG$ { Tav*+ System.err.println("Error Code : " + nErrorCode); :?/cPg'D } l-SAC3qhG a"FCZ.O1 QA<Jr5Ys //停止文件下载 GM3f-\/ public void siteStop() f>W- { 5[A@gw0u bStop = true; ~ vJ,`? for(int i=0;i<nStartPos.length;i++) W7 Cc fileSplitterFetch.splitterStop(); Zy o[(`y ~xD={9BL 5qr'.m } b]x4o#t } W0l,cOOZJ //负责部分文件的抓取 WN01h=1J_ **FileSplitterFetch.java %KmiH
;U */ u/M+u; package NetFox; pL{U `5S qMLD)rL dR"@` import java.io.*; d5oIH import java.net.*; '=Rs/EDME Qk,I^1w?7 ch0{+g& public class FileSplitterFetch extends Thread { t0IEaj75c <-[wd.M_ pov)Z):}G< String sURL; //File URL gLy&esJl1 long nStartPos; //File Snippet Start Position m06ALD_ long nEndPos; //File Snippet End Position {buo^kgj`] int nThreadID; //Thread's ID @}@Z8$G^ boolean bDownOver = false; //Downing is over O*0l+mop boolean bStop = false; //Stop identical YhDtUt}? FileAccessI fileAccessI = null; //File Access interface 8=gjY\Dp M+w=O!dq ptU\[Tq public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *T5!{ { w]]8dz this.sURL = sURL; UPG9)aF this.nStartPos = nStart; DP3PYJ%+B this.nEndPos = nEnd; \'|>p/5I nThreadID = id; mGJasn fileAccessI = new FileAccessI(sName,nStartPos);//定位 i(>4wK!! } ;*:Pw?' R'C2o] eD*A) public void run() P;Ga4Q. { MM(xk while(nStartPos < nEndPos && !bStop) X4 A<[&F/ { hRK/T7v kzt(i Y_6 <})2#sZO! try{
w-Da~[J URL url = new URL(sURL); vTJ}8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %k'!Iq+ httpConnection.setRequestProperty("User-Agent","NetFox"); c.>oe*+ String sProperty = "bytes="+nStartPos+"-"; :TJv=T'p' httpConnection.setRequestProperty("RANGE",sProperty); jO!y_Y]B Utility.log(sProperty); O"F_* R}q>O5O r\/9X}y4z InputStream input = httpConnection.getInputStream(); UFp,a0| //logResponseHead(httpConnection); oxz OA x
"^Xj]- P] UJ0b byte[] b = new byte[1024]; "4uS3h2r int nRead; C/TF-g-_Y while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) e>(<eu~P { TWQG591 nStartPos += fileAccessI.write(b,0,nRead); f!!V${)X //if(nThreadID == 1) X@K-^8 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P!+'1KR } cm&I* 0\ J6L K DX"xy Utility.log("Thread " + nThreadID + " is over!"); i`dCG[ bDownOver = true; w*oQ["SL //nPos = fileAccessI.write (b,0,nRead); 9983aFam } ?e,pN,4 catch(Exception e){e.printStackTrace ();} >hk=VyU; } )u/yF*:n } 6^%68N1k dIRm q+d^ Qj.l:9% //打印回应的头信息 1n:8s'\ public void logResponseHead(HttpURLConnection con) &?*V0luP) { u%$Zqee for(int i=1;;i++) 1oN^HG6O { ENGg
~D String header=con.getHeaderFieldKey(i); ;9#Z@]p if(header!=null) ev#;t@^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); Qzlo'e1 Utility.log(header+" : "+con.getHeaderField(header)); Axe8n1*y else SRrw0&ts break; @@8J6*y } #m{UrTC } |aT| l^2R@ UG'9*(* XVvK2( public void splitterStop() k;w- E { .)<(Oj|4 bStop = true; rz@=pR : } -lhLA`6_R nIU 6h 1rkE yh?? } B:!W$< Z(Bp 0a ~[\_N\rm /* jC7&s$>Q"g **FileAccess.java IFDZfx *//文件访问(定位,写)
'+$EhFwD package NetFox; }lfnnK# import java.io.*; dVsE^jsL $D}{]MN. "QWq_R public class FileAccessI implements Serializable{ r9
!Tug*>m
jz5qQt]^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 sIK;x]Q) RandomAccessFile oSavedFile; TJ1+g
\ long nPos; M
$Es% .8P.)% JvT"bZk(o public FileAccessI() throws IOException }(1JaG { ~fT_8z this("",0); pb$~b\s]= } qU#BJON]BR 3AsT z&{5;A}Q@ public FileAccessI(String sName,long nPos) throws IOException rxy&spX { ho0@ l oSavedFile = new RandomAccessFile(sName,"rw"); ^d~1E Er this.nPos = nPos; Pri`K/ oSavedFile.seek(nPos); 4Rvf } #@"<:!?z AKRTBjG"
e(I=^#u6 public synchronized int write(byte[] b,int nStart,int nLen) hrhb!0 { Xt#4/>dlR int n = -1; qt;y2gf= try{ Hrz f'a|^ oSavedFile.write(b,nStart,nLen); t| 'N+-T3 n = nLen; `$B3X } :@!ic<p catch(IOException e) l?Fb ='# { @)-$kk* e.printStackTrace (); &d5ia+# } <~n$1aA ;d'Z|H; m
q{]; return n; ea~:}!-P } OBP1B@|l$+ 2c:#O%d( a)#1{JaoY } k}0^&Quc4 RhvfC5Hq <F.Tx$s /* JGH60| **SiteInfoBean.java DNj"SF(J */ 2w-51tqm package NetFox; Hx\H $Y Pw;!uag TM|)Ljm public class SiteInfoBean { jMN[J|us51 ,i,q!M{- v0ES; private String sSiteURL; //Site's URL [w&$| h:; private String sFilePath; //Saved File's Path CBD6b l|A private String sFileName; //Saved File's Name zBJ7(zh! private int nSplitter; //Count of Splited Downloading File ea00\ zA!0l*H _dJ{j public SiteInfoBean() ]<q[Do8k {//nSplitter的缺省值为5 _Jt 2YZdA //default value of nSplitter is 5 t6A:ZmG_ this("","","",5); 1s{^X
- } {nvLPUL GKFq+]W 3RR_fmMT) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =pk)3<GwF { <@Fy5k-%. sSiteURL= sURL; N]<!j$pOz sFilePath = sPath; D.1J_Y=9 sFileName = sName; {!K-E9_,S this.nSplitter = nSpiltter; HCa wu4NLgkE p!<$vE } {M?vBgR\B ?x0pe4^If q=DN
{a: public String getSSiteURL() h'$9C { Y"6w,_'m return sSiteURL; RNhJ'&SYs } ]+m/;&0 m/@<c'i 9Y<#=C public void setSSiteURL(String value) C>[fB|^ { A,)VM9M_l sSiteURL = value; >N?2"" } yx<WSgWZ[ Qo1eXMW vYU;_R public String getSFilePath() VT.;:Q { TcGoSj<Z return sFilePath; h#hxOVl%x } 5 XA=G I6s3+x;O &k1T08C* public void setSFilePath(String value) *\o/q[ { U7DCx=B sFilePath = value; [M%9_CfZOy } wV)}a5+ ee/&/Gt 2EK%N'H public String getSFileName() }=2; { 7rC uu *M return sFileName; ZJjTzEV%^B } hHPs&EA.p q,3;m[cA xwH?0/ public void setSFileName(String value) $7'gRb4 { {q3H5csFq sFileName = value; wM_
6{ } @Fpb-Qd" -.|4Y#b:& \Fe_rh public int getNSplitter() :Yj)CGl$ { \i[BP return nSplitter; \bx~*FaX } 3 s>'hn "z*:'8;E ?~QIALA public void setNSplitter(int nCount) U5]pi+r { t
nS+5F nSplitter = nCount; _7D _72 } 4TwQO$C } cFagz* ! TbehR:B5g )!Bd6- /* D5an\gE **Utility.java X{g%kf,D= */ gLSA!#[h package NetFox; $y?k[Y-~ G3G6IP '&;69`FSe public class Utility { -[Qvg49jy
Xm4CKuU@ (#oycj^< public Utility() Sc]P<F7N] { 2Nj9U#A [Lp,Hqi5 ^MmC$U^n } %Z8vdU# l M]-VHI[&W //线程睡眠 K{l5m{:% public static void sleep(int nSecond) S
}>n1F_ { cMzkL% try{ s(_+!d6 Thread.sleep(nSecond); c[ht`!P } .!}hhiF,Z catch(Exception e) $iM=4
3W { K"2|[ 5 e.printStackTrace (); Uw<&Wm`' } x>~p;z#VX } ~B$b)`* !Do,>gO //日志 B/"2., public static void log(String sMsg) MbXq`% { lr2rQo> System.err.println(sMsg); c
{I"R8 } p[WX'M0f y>\S@I Fpt-V public static void log(int sMsg) 2>\\@1 { 4UAvw System.err.println(sMsg); zx1:`K0bi } n$2 RCQ } \nqo%5XL
0v^: T[Pa/j{ /* !CjqL~ **TestMethod.java \Z/k;=Sla */ ZB5?!.ND package NetFox; MF[z-7 5A&y]5-Q` V8O.3fo`[` public class TestMethod { Vj;
vo`T Ih1|LR/c *T4<& public TestMethod() NfE.N&vI_c { ///xx/weblogic60b2_win.exe '9J|=z9. try{ Napf"Av SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2@vj!U 8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); /!Z^Y SiteFileFetch fileFetch = new SiteFileFetch(bean); eFTX6XB:i fileFetch.start(); 6(sIYZ2yq } S2~@nhO`U( catch(Exception e){e.printStackTrace ();} }iIbcA `eRLc}aP2 g$j6n{Yl } qvt- /f1'm@8; )qPSD2h public static void main(String[] args) GLKO]y { 2r];V'r new TestMethod(); zL s^,x } !;>(ie\ } {aN(d3c 点击下载更多相关资料
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