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/* JA<Hm.V# **SiteFileFetch.java ,SVl>~! */ m,3H] package NetFox; V]{^}AKc import java.io.*; Zb? u'Vm=u import java.net.*; tjId?}\ <meQ <F%c"Rkh public class SiteFileFetch extends Thread { t5M"M{V s+fjQo4 $URL7hrhU SiteInfoBean siteInfoBean = null; //文件信息Bean (H[.\O-` long[] nStartPos; //开始位置 K5"8zF)* long[] nEndPos; //结束位置 &;x*uG FileSplitterFetch[] fileSplitterFetch; //子线程对象 kWZ@v+Mk3 long nFileLength; //文件长度 o1k
X` Eu boolean bFirst = true; //是否第一次取文件 #s}& boolean bStop = false; //停止标志 q4xP<b^ File tmpFile; //文件下载的临时信息 l.iT+T DataOutputStream output; //输出到文件的输出流 Md5|j0#p Quts~Q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) pRez${f.(s public SiteFileFetch(SiteInfoBean bean) throws IOException m|by^40A( { pl4:>4l/ siteInfoBean = bean; Tu[I84 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); C"
2K U* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Uv|?@zy# if(tmpFile.exists ()) <0h,{28 { {^jRV@ bFirst = false; W{l{O1, read_nPos(); *K'_"2J } Cx[Cst` else .Xcf*$.;s { f [DZ nStartPos = new long[bean.getNSplitter()]; *U}cj A:ZN nEndPos = new long[bean.getNSplitter()]; QNcbl8@ } `z!6zo2d !8@8 tupAU$h?! C&/_mm5 } W>'KE:!sp K @h94Ni6 hf1h*x^J public void run() esk~\!d { ^U.t5jj //获得文件长度 PHh4ZFl]_I //分割文件
']__V[ //实例FileSplitterFetch o+%($p //启动FileSplitterFetch线程 G5T( //等待子线程返回
$*S&i(z try{ 9Z^\b)x if(bFirst) &VdKL2 { d>1cKmH! nFileLength = getFileSize(); IA3m.Vxj ^ if(nFileLength == -1) q}r{%ypf { 'mm~+hp System.err.println("File Length is not known!"); Wi"3kps q } tW[dJKw else if(nFileLength == -2)
%c-T Gr, { `#c36 System.err.println("File is not access!"); JF6=0 } .:(T}\]R else r=4vN=: { i$jzn
ga for(int i=0;i<nStartPos.length;i++) 6BY(Y(z { 9.^2CM6l nStartPos = (long)(i*(nFileLength/nStartPos.length)); QTmMj@R&( } k8S`44vj for(int i=0;i<nEndPos.length-1;i++) Dwa.ZY}- { Q*W$!ZUT nEndPos = nStartPos[i+1]; ur|
vh5 } 2SRmh!hr nEndPos[nEndPos.length-1] = nFileLength; l\"wdS} } ,1e\}^ } "x4}FQ E(miQ $X ]t}= //启动子线程 {osadXdC fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; uMb[0-5 for(int i=0;i<nStartPos.length;i++) >mUSRf4 { lDVw2J'p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }Q-%ij2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^tRy6zG nStartPos,nEndPos,i); J_}Rsp ED Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); iVZX fileSplitterFetch.start(); o!Y61S( } \L:+k ` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Sh;Z\nj siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); u_'XUJ32! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )tp;2rJ/ nEndPos = " + nFileLength); 3\Tqs // fileSplitterFetch[nPos.length-1].start(); {D`_q| s#4Q?<65u %j.
*YvveW //等待子线程结束 g..&x]aS( //int count = 0; qE@H~& //是否结束while循环 -40s boolean breakWhile = false; ::k
cV'* 9w}_CCj3 X(qs]: while(!bStop) rvG0aqO` { N+CcWs!E write_nPos(); |gwGCa+ Utility.sleep(500); >)8<d3m breakWhile = true; 4#&w-W N D1'XCN ^<`uyY))Q for(int i=0;i<nStartPos.length;i++) 5]F4.sa { HzZ.q2Zz% if(!fileSplitterFetch.bDownOver) +Cs.v.GA5 { >goG\y breakWhile = false; 9ohO-t$XkY break; vhz Q.> } %h4|$ } 1pJ?YV if(breakWhile) 5$%CRm break; ~zcB@; :
CJf4b:SY@ jVInTR0f[ //count++; n|Gw?@CU7 //if(count>4) &]jCoBj+_ // siteStop(); w|(
ix;pK } .,&6 x. IiZXIG4H >d<tcaB System.err.println("文件下载结束!"); <hB~|a<# } 9HG" }CGZP catch(Exception e){e.printStackTrace ();} l*]nvd_ } 3}x6IM2 RWdx)qj{ ^KjxQO6y3 //获得文件长度 o!sHK9hvJ) public long getFileSize() TSKR~3D# { 4mwLlYZ int nFileLength = -1; 5@yBUwMSj try{ >e^8fpgSo URL url = new URL(siteInfoBean.getSSiteURL()); ,.TwM;w= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #)z7&nD httpConnection.setRequestProperty("User-Agent","NetFox"); fk'DJf[M Q|tzA10E
}ZkGH}K_} int responseCode=httpConnection.getResponseCode(); 7f\/cS^ if(responseCode>=400) o>MB8[r { /[=U$=uH processErrorCode(responseCode); m?]=
=9 return -2; //-2 represent access is error drd5oZ } uYMH5Om+i 8c' 5P R/ 3#(5 String sHeader; H':0 Oi$$vjs2 C`b)}dY for(int i=1;;i++) gM_MK8py { }-%:!*bLj //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i?IV"*Ob1N //Utility.log(in.readLine()); .(X!*J]G sHeader=httpConnection.getHeaderFieldKey(i); Mq4>Mu if(sHeader!=null) t[%ELHV { g#r,u5<*? if(sHeader.equals("Content-Length")) ~vstuRRST { eGi|S'L' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Ep8 y break; MURHv3 } o{xA{ @< } FcmL4^s.` else X,ok 3c4X break; v\Edf;( } P;[>TCs ]8 } ?Y'r=Q{w catch(IOException e){e.printStackTrace ();} Na{&aqdz catch(Exception e){e.printStackTrace ();} K?H(jP2mpM l4Q v$ V2BsvR` Utility.log(nFileLength); 2X|nPhNi ],w+4;+ m}GEx)Y D return nFileLength; 0JX/@LNg0 } u!9bhL` Ct pc]lJ} u#`'|ko\9 //保存下载信息(文件指针位置) jU_#-<'r private void write_nPos() L;'C5#GN { 1j\wvPLr try{ =801nZJ output = new DataOutputStream(new FileOutputStream(tmpFile)); S'(Hl}h!. output.writeInt(nStartPos.length); @+(a{%~7y for(int i=0;i<nStartPos.length;i++) :AM_C^j~
D { apd"p{ // output.writeLong(nPos); 5gH'CzU? output.writeLong(fileSplitterFetch.nStartPos); {14sI*b16 output.writeLong(fileSplitterFetch.nEndPos); CV7%ud]E } [Ontip output.close(); u\P)x~-TM } y];@ M<<?e catch(IOException e){e.printStackTrace ();} ^ Mw=!n[ catch(Exception e){e.printStackTrace ();} '~OKt`SfIo } : ?z E@Ct #PZBh kYU!6t1 //读取保存的下载信息(文件指针位置) TTm private void read_nPos() uoe>T: { T[]kun try{ mBWhC<kKs DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <7yn : int nCount = input.readInt(); sZYTpZgW4L nStartPos = new long[nCount]; Ng+Ge5C9 nEndPos = new long[nCount]; i=j4Wg ,{J for(int i=0;i<nStartPos.length;i++) .p
/VRlLU { +e( (! nStartPos = input.readLong(); `]m/za%7 nEndPos = input.readLong(); =*Y=u6? } H`Ld,E2ex& input.close(); r:9H>4m } ]-tAgNzl% catch(IOException e){e.printStackTrace ();} Cswa5l`af catch(Exception e){e.printStackTrace ();} @ )m9#F } l527>7 eT iYl$25k/1 @d_;p<\l private void processErrorCode(int nErrorCode) V9<CeTl' { (]*!`(_b System.err.println("Error Code : " + nErrorCode); 2W q/_: } u}BN)%`B 31n|ScXv eKek~U& //停止文件下载 "i/3m'<2 public void siteStop() s&~.";b
{ d&5GkD.P bStop = true; B)L;ja for(int i=0;i<nStartPos.length;i++) Dd$CN&Ca fileSplitterFetch.splitterStop(); Oky9GC.a 0fU^ X]AbBzy } } P/
x@N } "Go)t+- //负责部分文件的抓取 %QKRl5RM- **FileSplitterFetch.java "f3KE=cUm */ jj*e.t:F package NetFox; 7COJ.rA Mv^G%zg2 i=8){GX4 import java.io.*; V0'_PR@; import java.net.*; LTt|"D {qkd63X o= N_0. public class FileSplitterFetch extends Thread { y6!Zt}m
txW<r8 .3*VkAs String sURL; //File URL 0A>Fl* long nStartPos; //File Snippet Start Position 7+^4v(s long nEndPos; //File Snippet End Position b1`(f"&l int nThreadID; //Thread's ID 4<QSot boolean bDownOver = false; //Downing is over lg!{?xM boolean bStop = false; //Stop identical Pw_[{ LL FileAccessI fileAccessI = null; //File Access interface O`W&`B(*k j2"Y{6c b(McH*_8e public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zPT!Fa` { %xWscA%^u this.sURL = sURL; mQ]wLPP{1 this.nStartPos = nStart; L?(%
* this.nEndPos = nEnd; k1
nThreadID = id; IfGQeynj fileAccessI = new FileAccessI(sName,nStartPos);//定位 .+TriPL } 9QryW\6.@z Sk 10"D B/ Z/@%MEU[zl public void run() (" +/ : {
C6`<SW while(nStartPos < nEndPos && !bStop) $k&}{c8P { l
TJqWSV=f %<Q?|} Bz#K_S try{ 63?fn~0\ URL url = new URL(sURL); %7oB[2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $@blP<I httpConnection.setRequestProperty("User-Agent","NetFox"); 2o5v{W String sProperty = "bytes="+nStartPos+"-"; uKZe"wN; httpConnection.setRequestProperty("RANGE",sProperty); #Ua+P(1q Utility.log(sProperty); ,lly=OhKb {%;KkC8=R jW-j+WGSM InputStream input = httpConnection.getInputStream(); (SlrV8; //logResponseHead(httpConnection); gB?~!J? ~CB6+t>
iEf6oM byte[] b = new byte[1024]; Eb<iR)e H= int nRead; = ?hx+-' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ]8X Y"2b { vQ}'4i8( nStartPos += fileAccessI.write(b,0,nRead); fYzOT,c //if(nThreadID == 1) yEfV8aY'* // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |,ZmRW^2K } {m/\AG)1I hL,+wJ+A D~xUr)E Utility.log("Thread " + nThreadID + " is over!"); NgnHo\) bDownOver = true; Svmyg] //nPos = fileAccessI.write (b,0,nRead); T$'GFA } ?wR;" catch(Exception e){e.printStackTrace ();} wxg`[c$: } RJ_ratKN*g } <(Wa8PY2( MKdBqnM(F ZN2g( //打印回应的头信息 t_q`wKDE public void logResponseHead(HttpURLConnection con) nJ|8#U7 { %8T:r S for(int i=1;;i++) {daNw>TH { h
!~u9 String header=con.getHeaderFieldKey(i); O]n"aAu@ if(header!=null) qYW{$K //responseHeaders.put(header,httpConnection.getHeaderField(header)); =Po!\[SBU Utility.log(header+" : "+con.getHeaderField(header)); OKp(A else sM?bUg0w break; 1a)NM# } kQ$Q}3f } :ji_dQ8k 8IH&=3 gkuI!= public void splitterStop() Mc9P(5Bf { <)zh2UI bStop = true; B(mxW8y } EO,;^RtB A`7uw|uO$ 'r%`(Z{~ } daaEN( QY2!.a^q 0:**uion /* :XMw="u= **FileAccess.java aho;HM$hjP *//文件访问(定位,写) u!%]?MSc package NetFox; )Xa`LG=| import java.io.*; 6-#f1D 6 qoMYiF}/e yg "u^*r& public class FileAccessI implements Serializable{ e:V(kzAY; ^\cB&<h //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 r +;C}[E RandomAccessFile oSavedFile; jz|zq\Eek long nPos; '
%OQd?MhL } VE[W O!zH5 public FileAccessI() throws IOException e+=Oj o# { kRskeMr:Rd this("",0); qqSk*oH~ } T IPb ] uG3t%CmN A0M)*9 f public FileAccessI(String sName,long nPos) throws IOException xkOyj`IS
{ o:#MP(h,N oSavedFile = new RandomAccessFile(sName,"rw"); /MSz{ %v this.nPos = nPos; {t[j>_MYw oSavedFile.seek(nPos); ?N#mD } ]}F_nc2L Tn/
3`j
{ 4D[W;4/p public synchronized int write(byte[] b,int nStart,int nLen) -)
$$4<L { =4yME int n = -1; d> Y9g try{ au574tj oSavedFile.write(b,nStart,nLen); :n>m">4 n = nLen; XN]kNJX } :SSe0ZZ_6b catch(IOException e) B{QY-F~ { p0uQ>[NV0 e.printStackTrace (); 0<Px2/ } @g""*T1:$ v%V$@MF ^o|igyS9 return n; /bVU^vo } TH)gW G F,/<R # G[6V=G } ?`,UW; Br6 iO3@2J Tm[IOuhM'? /* " 9 h]P^ **SiteInfoBean.java eqs.zL */ O} QTg package NetFox; +=Crfvt Q9X_aB0 GKtG#jZ& public class SiteInfoBean { {k}S!T <"AP&J'H F^&_O*" private String sSiteURL; //Site's URL ,S:LhgSP private String sFilePath; //Saved File's Path 0NZg[ >H private String sFileName; //Saved File's Name hI;tB6 private int nSplitter; //Count of Splited Downloading File {?l#*XH; `*8p T 4&r^mGs, public SiteInfoBean() o{?s\)aBa {//nSplitter的缺省值为5 DK&J"0jz, //default value of nSplitter is 5 LnxJFc:1K this("","","",5); Wze\z
} CP'?Om2 %z tCcgu* JpD<2Mz_|V public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) lzfaW-nu { zOCru2/ sSiteURL= sURL; }X)mZyM [ sFilePath = sPath; i=.zkIjSh sFileName = sName; Cz+>S3v M this.nSplitter = nSpiltter; 8"LvkN/v^ :u` \$V~kgQ0 } z(aei(U= y0M^oLx 5"c#OU public String getSSiteURL() :U0z; { eFp4MD8? return sSiteURL; BE:HO^-.1 } :o&qJ% 5K;jW ~0!s5 public void setSSiteURL(String value) bB->\ { TV#pUQ3K sSiteURL = value; g03I<<|@ } F# y5T3(P hoD (G X ZTVX5"#Q public String getSFilePath() 4W*52*'F, { 8{ 8J(~ return sFilePath; ,mhO\P96ik } 6OF&Q`*4 ib0M$Y1tIS -{>JF public void setSFilePath(String value) u=5&e)v3 { <6)Ogv", sFilePath = value; PP.QfY4 } D4ESo)15' p}.L]Y ow!utAF public String getSFileName() xJa { 0g,;Yzm return sFileName; cclx$)X1X } d0"Hu^] %]h5\%@w !<Ma9%uC{ public void setSFileName(String value) 2)Grl;T]s { UIi;&[ sFileName = value; Q35$GFj"jD } Waj6.PCFm X&8&NkH oa? bOm public int getNSplitter() <xKer<D
% { 3~;LNi return nSplitter; -uIu-a] } 3'}(:X( "9jt2@< aJ}y|+Cj public void setNSplitter(int nCount) k(pI5N}pJZ { Fo=Icvo nSplitter = nCount; g'ha7~w(p } s3>,%8O6 } ]+<[D2f R?b3G4~ 1N{}G$'Go /* 5 >S#ew **Utility.java =&;orP */ ]B/Gz package NetFox; c
Owa^; RSC^R}a5 NGcd public class Utility { SU~t7Ta!G P$ZIKkf !K-lO{Z^ public Utility() wmAZ { {
$A]2Iw!& 18f!k :W6`{Z } FNL[6.!PV `U?"
{;j
{ //线程睡眠 {VtmQU?cJ public static void sleep(int nSecond) cVYDO*N2T { B+[ri&6X\ try{ M!Q27wT8O Thread.sleep(nSecond); [-5%[ty9X } Sio^FOTD catch(Exception e) 0tyoH3o/d { z SDRZ! e.printStackTrace (); v._Q XcE } \{``r } G_vWwH4XtL Y"6
' //日志 }K':tX? public static void log(String sMsg) Q#w mS&$f { &YC Z
L System.err.println(sMsg); h_#x@p } }%Mj`Bh W^#HR {9:[nqX public static void log(int sMsg) ;,2i1m0" { v;m`d{(i2 System.err.println(sMsg); o81RD#>E) } fy]z<SPhVJ } Bn:"qN~ J<hqF4z ZeM~13[ /* [d
30mVM **TestMethod.java Sggha~E2s */ omz%:'m`~ package NetFox; =h5&:?X g~EN3~ 7X
4/6]* public class TestMethod { s8BfOl- &CBW>*B cHo@F!{o= public TestMethod() dpG l { ///xx/weblogic60b2_win.exe c=d` DJ try{ $d0xJxM SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); cxX/ b, //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); F{*{f =E!B SiteFileFetch fileFetch = new SiteFileFetch(bean); pRR1k? fileFetch.start(); m8M2ka } = VIU
catch(Exception e){e.printStackTrace ();} stGk*\>U' ?R-4uG[( bd|ZhRsL } ox:m;-Ml?_ -c%#Hd ,~8&0p public static void main(String[] args) 03N|@Tu { C_>
WU new TestMethod(); 6=N!()s } RJ}%pA4I } X%(1C,C( 点击下载更多相关资料
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