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/* +> d;%K **SiteFileFetch.java ^*+M9e9Z */ z@o6[g/*Q package NetFox; ;MK|l,aIQ import java.io.*; IW>~Yl? import java.net.*; B/qN1D]U. l'M/et{: Q+wO\TtE public class SiteFileFetch extends Thread { Q'!'+;&% MM*~X"A xIW]e1pu=( SiteInfoBean siteInfoBean = null; //文件信息Bean <Rs$d0/ long[] nStartPos; //开始位置 fI2y(p{? long[] nEndPos; //结束位置 h oM%|,0 FileSplitterFetch[] fileSplitterFetch; //子线程对象 3
{hUp81> long nFileLength; //文件长度 Fw{68ggk boolean bFirst = true; //是否第一次取文件 8SLE*c^8 boolean bStop = false; //停止标志 n*' :,m File tmpFile; //文件下载的临时信息 u8<[Q]5 DataOutputStream output; //输出到文件的输出流 8~yP?#p UjLq[,_! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) BOR$R}q public SiteFileFetch(SiteInfoBean bean) throws IOException g kV`ZT9 { [s\8@5?E
siteInfoBean = bean; c0HPS9N\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); tC oE4Ed tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p&u\gSo if(tmpFile.exists ()) =cb!2%?} { 5O]ZX3z> bFirst = false; WNb2"W read_nPos(); \x:U`T } \IYv9ScAx else Vgkj4EE { N6p0` nStartPos = new long[bean.getNSplitter()]; )V+/@ 4 nEndPos = new long[bean.getNSplitter()]; I<,~>'cq. } {T,}]oX US^%pd 3-6MGL9 [` }w7 } PFx.uqp f Ayh9 iOCs%J public void run() ;K|K]c { f2pA+j5[ //获得文件长度 bA2[=6 //分割文件 D|<_96_m //实例FileSplitterFetch ZR%$f- //启动FileSplitterFetch线程 /ueOc<[8" //等待子线程返回 (UhJ Pco" try{ }EHL
}Q if(bFirst) BzH0"xq^ { _TmKn!Jw nFileLength = getFileSize(); 0_-o]BY if(nFileLength == -1) iR PE0 { W1Fhx` System.err.println("File Length is not known!"); y`5
? } JUj.:n2e else if(nFileLength == -2) (CH6Q]Wi_! { yi Xb<g+B System.err.println("File is not access!"); aIQC[ry } $cuBd else 1{]S[\F] { Y,yU460T8 for(int i=0;i<nStartPos.length;i++) [{#TN { %C #Ps nStartPos = (long)(i*(nFileLength/nStartPos.length)); #`=>Mza } WA1yA*S for(int i=0;i<nEndPos.length-1;i++) \ZhkOl { 0S4Y3bac& nEndPos = nStartPos[i+1]; n[qnrk*3
% } @jjxgd'%& nEndPos[nEndPos.length-1] = nFileLength; 92R,o'# } }.U(Gxu$ } OC-d5P
wu11)HFL|z 7J`v# //启动子线程 ;;rx)|\<R fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ^&y*=6C for(int i=0;i<nStartPos.length;i++) t5S|0/f { J}4RJ9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &'i>d& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), p\#;(pf}s nStartPos,nEndPos,i); 'rFLG+W Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &e3}Vop fileSplitterFetch.start(); yw%ES } L0H^S)g // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :SO4@JT{W siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); -:Fr($^ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }?Pa(0=U
nEndPos = " + nFileLength); |0>rojMq // fileSplitterFetch[nPos.length-1].start(); P s|[ /NR*<,c% $7xfLS8Vo //等待子线程结束 uh#E^~5S //int count = 0; a #s
Nd //是否结束while循环 <;>k[P' boolean breakWhile = false; $Jn.rX0}$ xiQc\k$ OEzSItAI/[ while(!bStop) xO%yjG= { >b#CR/^z write_nPos(); X}h}3+V Utility.sleep(500); fpjFO&ML breakWhile = true; |F'eT
4 e.(d?/!F_ ygm6(+ for(int i=0;i<nStartPos.length;i++) n}1hmAhZ { qh&KNJ>1 if(!fileSplitterFetch.bDownOver) +!`$( { @m:'
L7+ breakWhile = false; P@n
rcgM. break; \k6OP } ,If"4C!w } BVH)!]m0 if(breakWhile) qX6zk0I a break; "]'W^Fg x
0vW9*& i!JSEQ_8 //count++; $Op:-aW& //if(count>4) 8Jp?@qt=$ // siteStop(); prIJjy-F } Oq3t-omXS !^1oH** B%))HLo' System.err.println("文件下载结束!"); (U.VCSn } nHfAx/9! catch(Exception e){e.printStackTrace ();} h]|2b0 } K&dc< 4DC u8<Fk
! uV'C_H //获得文件长度 ,g|ht%" public long getFileSize() eUgKwu; { %\B?X;( int nFileLength = -1; i
!SN"SY try{ o@} qPvt0 URL url = new URL(siteInfoBean.getSSiteURL()); #0#6eT{- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5$$]ZMof httpConnection.setRequestProperty("User-Agent","NetFox"); A9[D.W9> w#bdb; '=(yh{W int responseCode=httpConnection.getResponseCode(); )D]LPCd[ if(responseCode>=400) T0\[":
A { 3A\Hiy!{F processErrorCode(responseCode); M[R' return -2; //-2 represent access is error I;P! } $"=0{H.? ^*~4[?]S *iPBpEWC String sHeader; d+8|aS<A Aj> )hK;27m4 for(int i=1;;i++) ,qdZ6bv,]| { H
a`V"X{} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Z$)jPDSr //Utility.log(in.readLine()); B|;?#okx sHeader=httpConnection.getHeaderFieldKey(i); 9!D
c= if(sHeader!=null) :{Iv
]d { mT1Q7ta*P if(sHeader.equals("Content-Length")) n{c-3w.uD { |B),N f|a nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); b&pL}o?/k break; b3-+*5L } +gb"}
cN } &23t/` else =VZ0+Yl break; ve(@=MJ } e#tWQM3 } ZQ#AE VI, catch(IOException e){e.printStackTrace ();} cW^u4%f't' catch(Exception e){e.printStackTrace ();} q&wv{ ~~WX#Od*$ f{D~ZC.* Utility.log(nFileLength); kAoh#8= *AYjMCo !t&C,@Ox return nFileLength; u$x'P <b } o-]8)G>~M B :1r;8{j \&Oc}] //保存下载信息(文件指针位置) 42DB0+_wz private void write_nPos() ob(~4H- { U }}E
E~W try{ NX<Q}3cC output = new DataOutputStream(new FileOutputStream(tmpFile)); n(Ry~Xu_ output.writeInt(nStartPos.length); 9z?B@;lMc for(int i=0;i<nStartPos.length;i++) FzFP 0 { FOX0 // output.writeLong(nPos); ~T'$gl output.writeLong(fileSplitterFetch.nStartPos); ')E4N+h/ output.writeLong(fileSplitterFetch.nEndPos); 88atj+N] } Otm7j>w output.close(); "I[uD)$ } {_J1m&/ catch(IOException e){e.printStackTrace ();} !f8]gT zN catch(Exception e){e.printStackTrace ();} 4({Wipd } ew8Manx Hb9r.;r<EW 'jU ;.vZex //读取保存的下载信息(文件指针位置) v;R+{K87 private void read_nPos() Q .cL1uHc { iA+zZVwO try{ }cI _$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); p!cNn7{; int nCount = input.readInt(); to'O;f">n nStartPos = new long[nCount]; D??
\H\ nEndPos = new long[nCount]; CK} _xq2b for(int i=0;i<nStartPos.length;i++)
kS(v|d { aaesgF nStartPos = input.readLong();
C6}`qD nEndPos = input.readLong(); T:EUI] } Jd/XEs?<q input.close(); K;(t@GL? } JuXuS catch(IOException e){e.printStackTrace ();} dw< b}2 catch(Exception e){e.printStackTrace ();} !tv+,l&L } 0[SrRpD BQ77n2(@ tumYZ)nW private void processErrorCode(int nErrorCode) i.>d#S { >]l7AZ:, System.err.println("Error Code : " + nErrorCode); Gv}~ } 1cPjgBxv# 'tzN.p1O Q!}LtR$ //停止文件下载 hk+"c^g:j< public void siteStop() si>gYO { ndB*^nT bStop = true; >U'gQS?\] for(int i=0;i<nStartPos.length;i++) ~px)Jd fileSplitterFetch.splitterStop(); WzO[-csy V]A*' ke/ 1ba* U~OEg } ?O#,|\v?] } hvU\l`m //负责部分文件的抓取 $3 ~/H"K **FileSplitterFetch.java !5h@uar */ I)cA:Ip package NetFox; PsoW:t Z <vTr6? 3gU*,K7 import java.io.*; 6I$:mHEhd import java.net.*; /c-%+Xd nL-kBW Ed> -&_;x&k
/ public class FileSplitterFetch extends Thread { _'DZoOH|VE iQ_^MzA }{m.\O String sURL; //File URL Z%O>|ozpq long nStartPos; //File Snippet Start Position wDS(zG long nEndPos; //File Snippet End Position (
G# W6 int nThreadID; //Thread's ID a$P$Ngi?S boolean bDownOver = false; //Downing is over |+(Hia,X boolean bStop = false; //Stop identical ^B7C8YP FileAccessI fileAccessI = null; //File Access interface QDJ:LJz\ w`r)B`!g #`{L_n$c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException j+>&~ { ?;)F_aHp this.sURL = sURL; :~+m9r this.nStartPos = nStart; w?zY9Fs=s this.nEndPos = nEnd; tR% &.,2 nThreadID = id; B< BS>(Nr> fileAccessI = new FileAccessI(sName,nStartPos);//定位 14;lB.$p } |9cSG),z XP!7@: y@Q?
guB public void run() naB`@ { `tZ`a while(nStartPos < nEndPos && !bStop) /QCyA%y { H@hHEzO Qp]-4%^Vz 1brKs-z try{ b!xm=U URL url = new URL(sURL); ^5d9n<_xnQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1*J#:|({(
httpConnection.setRequestProperty("User-Agent","NetFox"); `di/nv) String sProperty = "bytes="+nStartPos+"-"; b9@VD)J0E httpConnection.setRequestProperty("RANGE",sProperty); \H5{[ZUn Utility.log(sProperty); VyL|d^'f_ J?N9*ap) o@g/,V $ InputStream input = httpConnection.getInputStream(); E?Ofkc$q //logResponseHead(httpConnection);
j8"2K^h= /Jc i1o
9
]W4o" byte[] b = new byte[1024]; bB|P`lL int nRead; "sU ~| while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [O"8Tzr { qo" _w%{ nStartPos += fileAccessI.write(b,0,nRead); z("Fy //if(nThreadID == 1) Um'r6ty // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !4l\*L } ``4lomz> gC qQ~lWZ Jf=$h20x Utility.log("Thread " + nThreadID + " is over!"); nzK"eNDN. bDownOver = true; 3?R QPP //nPos = fileAccessI.write (b,0,nRead); :},/D*v } .JkF{&=B catch(Exception e){e.printStackTrace ();} 86,$ I+ } uuMHD{}?} } S0<m><|kl Vz,2_QJ hu+% X.F4 //打印回应的头信息 lm;G8IP` public void logResponseHead(HttpURLConnection con) 15 ^5yRXC { CAD:ifV for(int i=1;;i++) X@n\~[.B { AE"E($S` String header=con.getHeaderFieldKey(i); vz_ZXy9Z if(header!=null) kbkq.fYr //responseHeaders.put(header,httpConnection.getHeaderField(header)); #Qp.O@e Utility.log(header+" : "+con.getHeaderField(header)); )c$)am\I{ else W=k%aB?p break; Ly$s0.! } z.7'yJIP# } )bGd++2 )4P5i
b Qe )#'$T public void splitterStop() axW4cS ? { hj.Du+1 bStop = true; sR1
&2hB } br9`77J8 aab?hR HKdR?HM1 } !bHM:!6^ G$D6#/rR 4U*uH /* H}$hk **FileAccess.java An%V>a-[ *//文件访问(定位,写) >WW5Apy[ package NetFox; UUt631 import java.io.*; p3NTI /- -)Y?1w F^]?'`7md public class FileAccessI implements Serializable{ :tA|g Um$a9S8b& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ymsqJ RandomAccessFile oSavedFile; Mwdw7MZ"S long nPos; 69v[*InSd ]cv|A^ 0+\~^ public FileAccessI() throws IOException %TJF+; { YTco;5/ this("",0); ^<e"OV } o\luE{H
.? (qP !x 2j 0P_Y6w+ public FileAccessI(String sName,long nPos) throws IOException afZPju"- { )^&)f!f oSavedFile = new RandomAccessFile(sName,"rw"); LQMVC^G this.nPos = nPos; W`PK9juu oSavedFile.seek(nPos); W&>+~A } pP'-}% z^f-MgWG CDcs~PR@B public synchronized int write(byte[] b,int nStart,int nLen) h ,@x5q>g { Wb4%=2Qn int n = -1; \4SFD3$& try{ 3\,TI`^C oSavedFile.write(b,nStart,nLen); Xm`K@hJ@ n = nLen; JHf}LZu } iDO~G($C catch(IOException e) "*@iXJxv5 { y(RbW_
? e.printStackTrace (); b* 6c.
} NRKAEf_#w uREc9z`Q' ~P5!VNJ;r return n; Ej1 [ry } VmTk4?V4 b)u9#%Q d]e`t"Aj } <C4^Vem e<^tY0rR& <,0&Ox /* 1F5F2OT$8 **SiteInfoBean.java 33\b@F7b */ `bZ_=UAb package NetFox; RWBmQg^]X B`hxF(_p/ LFSOHJj public class SiteInfoBean { UhCd, E"Xi xiRTp:> private String sSiteURL; //Site's URL 6x@-<{L private String sFilePath; //Saved File's Path d*3R0Q|#{ private String sFileName; //Saved File's Name ?=IbiT private int nSplitter; //Count of Splited Downloading File -T{~m6 gr=ke #
hJ:Hv.{`)W public SiteInfoBean() O!f* @ {//nSplitter的缺省值为5 ]?)zH:2) //default value of nSplitter is 5 PJAir8 this("","","",5); kX1hcAa } nbpN+a% 7<.f&1MgI =GR
Em5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) '~ ]b;nA { GZ'hj_2%< sSiteURL= sURL; <6apv(2a sFilePath = sPath; g6W.Gl"5\w sFileName = sName; y+:< this.nSplitter = nSpiltter; cDTDim1F 9I RE@c #8/Z)-G } dy`~%lX? 1xtbhk]D Vxgc|E^J public String getSSiteURL() ^U_jeAuk8[ { k LD)<D return sSiteURL; ;pB?8Z } E/GI:}YUy_ nMc-kyl{ 9J]LV'f7 public void setSSiteURL(String value) G>_ZUHdI { &P{%C5?{ sSiteURL = value; d&'6l"${ } @pkozE- &(.ZHF Ra*9d]N@ public String getSFilePath() BLJ-'8G { "J{,P9P6 return sFilePath; 5d4-95['_ } -=qmYf fCVSVn"o jN {ED_ public void setSFilePath(String value) b'{D4/ { P7Y[?='v sFilePath = value; \|&5eeE@ } )O&$-4gL' U&eLj"XZ Ns9g>~ public String getSFileName() MoFZ { |]]fcJOBP return sFileName; gVl#pVO`N } h'jnc. yWK[@;S]% IaF79}^ public void setSFileName(String value) d~_OWCg` { l/I W"A sFileName = value; iCEX|Tj; } p' gv5\u[w <n`|zQ !{3pp public int getNSplitter() )t.q[O` { QTyl=z7 return nSplitter; $ `ho+ } . }1!MK5 BW*zj=N% }gn0bCJy public void setNSplitter(int nCount) -FPl",f=r { +<|w|c nSplitter = nCount; B=p'2lla } ><DE1tG } JEd/j
zR( v]1rH$ 6Rt pB\hq /* '\;tmD"N5# **Utility.java 9(I4x]` */ [zfGDMG& package NetFox; KVntBe]I NSkI2>+P P6?Q;-\q0 public class Utility { w7W-=\Hvh #nd,c n ](ninSX1w public Utility() k{#:O= { D *tBbV 5u!cA4e" doa$
;=wg } Q7s1M&K {%$=^XO //线程睡眠 2,fB$5+ public static void sleep(int nSecond) R3<+z { $200?[ try{ Yl f4q/- Thread.sleep(nSecond); S&0x:VW } =os j}( catch(Exception e) {J]|mxo { O//e0?]W e.printStackTrace (); #-`lLI:w0 } WZr~Pb9 } a"zoDD/ g$tW9 Q //日志 BCj&z{5"7e public static void log(String sMsg) ?b0\[ { t>[r88v System.err.println(sMsg); h
Na<LZ } wVVe L$28 v 3NaX. MoA{ /{ public static void log(int sMsg) g,;MV7yE { JB|I/\(A System.err.println(sMsg); B?M+`; } y/FisX } )v9[/
]*P pA2U+Q@ j0GI[# /* p#kC#{<nE **TestMethod.java s5pY)6) */ P8jK
yo package NetFox; fin15k w9FI*30 3%} Ma, public class TestMethod { cm]]9z_< gr;M
NR*SEbUU* public TestMethod() L`#+ZLo { ///xx/weblogic60b2_win.exe kpdFb7>| try{ ^WNJQg' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); H07j& //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |}`5<a!6U SiteFileFetch fileFetch = new SiteFileFetch(bean); >W;i2%T fileFetch.start(); I%p#E#[G } qj1z>,\ catch(Exception e){e.printStackTrace ();} X=3@M_Jzo #^9;<@M cC4T3]4l' } Zx_m?C_2_ coWB KWF R+K[/AA public static void main(String[] args) #RF=a7&F { Trrh`@R new TestMethod(); gy{a+Wbc* } <} %ir,8 } B /W$RcV 点击下载更多相关资料
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