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/* hS]g^S==2h **SiteFileFetch.java BrYU*aPW; */ HRkO.230
package NetFox; 7%?2>t3~ import java.io.*; 7'wt/9 import java.net.*; ~=h M y`Ml :.kc1_veYS (_G&S~@. public class SiteFileFetch extends Thread { [+0rlmB oh+Q}Fa: j-wSsjLk SiteInfoBean siteInfoBean = null; //文件信息Bean *yJCnoF long[] nStartPos; //开始位置 oTOr,Mn0\6 long[] nEndPos; //结束位置 ?>b>LDpx? FileSplitterFetch[] fileSplitterFetch; //子线程对象 L><# I long nFileLength; //文件长度 WP, Ll\K)7 boolean bFirst = true; //是否第一次取文件 rU?sUm,ch boolean bStop = false; //停止标志 0r?975@A File tmpFile; //文件下载的临时信息 zbH Nj(~ DataOutputStream output; //输出到文件的输出流 q)%F#g "Y(stRa //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yl|?+ public SiteFileFetch(SiteInfoBean bean) throws IOException )cA#2mlS'1 { Jy&O4g/'5 siteInfoBean = bean; |J:n'} //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); z-<091, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); f,:SI&c\ if(tmpFile.exists ()) D<}z7W- { &u5OL?> bFirst = false; hE>ux"_2/ read_nPos(); y<7C!E#b8 } \l^L?69 else :^7P. lhK { z3!j>X_w nStartPos = new long[bean.getNSplitter()]; U ObI&*2 nEndPos = new long[bean.getNSplitter()]; `"CIy_m } ^):m^w. $hexJzX gycjIy@t W}&[p=PAS } r*#ApM"L :1h1+b@, O;RsYs9 public void run() +X[+SF)! { o&]b\dV //获得文件长度 t']d_Vcza //分割文件 L ]HtmI //实例FileSplitterFetch 1Rlg%G' //启动FileSplitterFetch线程 }SL&Y `Y] //等待子线程返回 @<]sW*s try{ 3IXai)6U if(bFirst) k
I{)" { l,cnMr^.W nFileLength = getFileSize(); ks92-%;: if(nFileLength == -1) ~{Gbu oH { r!H'8O! System.err.println("File Length is not known!"); m80e^ } G-`4TQ else if(nFileLength == -2) X}T/6zk { 0k]$ he;h System.err.println("File is not access!"); `Y HnL4 } *|)a@VL else NfG<! { !cP2,l'f for(int i=0;i<nStartPos.length;i++) YbaaX{7^ { >*jcXao^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); eVL#3|= } ${(v
Er#}k for(int i=0;i<nEndPos.length-1;i++) a1p Z{Od { uw'>tb@ nEndPos = nStartPos[i+1]; ><<(6 } Lhg4fuos@) nEndPos[nEndPos.length-1] = nFileLength; &PY~m<F } 0$RZ~ } }xZR`xP( +NML>g#F~z ra87~kj< //启动子线程 8 xfn$ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Y0nnn for(int i=0;i<nStartPos.length;i++) pq8XCOllXx { ;U7o)A; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9a\H+Y~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ziclw) nStartPos,nEndPos,i); r6
k/QZT Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m]C|8b7Y fileSplitterFetch.start(); OIi8x?
.~] } pib i# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W 7xh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); F"p7&e\W|l // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &BF97%E2 nEndPos = " + nFileLength); 2~`lvx // fileSplitterFetch[nPos.length-1].start(); MNC=r? _=%F6}TE >"LHr&;m&h //等待子线程结束 \X3Q,\H
@ //int count = 0; Uh6LU5 //是否结束while循环 ;Fo%R$y boolean breakWhile = false; :/rl \woA> P{T\zT %"<|u)E while(!bStop) &,v-AL$:Q { #}M\ J0QG write_nPos(); -DVoO2|Dv Utility.sleep(500); G909R> breakWhile = true; *R'r=C` ,W8EU =g.R?H8cj5 for(int i=0;i<nStartPos.length;i++) ;$a+ > { `efC4#*!! if(!fileSplitterFetch.bDownOver) fAEgrw%Ti { q fc:%ks2 breakWhile = false; 1iA0+Ex(j break; (M0"I1g|w } \eF_Xk[ } <QuIX A if(breakWhile) ~^{>!wU+ break; nrBpq ^_4e^D]P" G_m $?0\ //count++; %IA1Y>` //if(count>4) J#>)+ // siteStop(); [Xa,| }
g2LY~ jj,CBNo( ^4 MJ System.err.println("文件下载结束!"); D%`O.2T Y| } `w6*(t:T catch(Exception e){e.printStackTrace ();} TdU'L:<4l } 3 as~yF0 opXxtYC@ d/8p?Km //获得文件长度 )_&P:;N public long getFileSize() ndmsXls { bIWSNNV0F int nFileLength = -1; JpRn)e'Z try{ 4Wd
H!z URL url = new URL(siteInfoBean.getSSiteURL()); JRw<v4pZ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ao )\/AR' httpConnection.setRequestProperty("User-Agent","NetFox"); \?D~&d,a= 1^ijKn@6 "u.'JE;j int responseCode=httpConnection.getResponseCode(); xA'RO-a}h if(responseCode>=400) HUFm@? { .9u0WP95 processErrorCode(responseCode); @*16agGg return -2; //-2 represent access is error 9bQD"%ha=d } :hBLi99
o S.zY0 >"q?P^f/ String sHeader; hS 9^Bi b$eN]L ~} 02q5H for(int i=1;;i++) `t>A~.f { [$DI!%e| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #AR$'TE# //Utility.log(in.readLine()); dHkI9; sHeader=httpConnection.getHeaderFieldKey(i); 0;L.h|R T( if(sHeader!=null) cGSG}m@B` { y&W3CW\: if(sHeader.equals("Content-Length")) KY%LqcC { n%ypxY0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
a)8;P7 break; 0<XxR6w } <74r } V}MRdt7 else I&%KOe0 break; Eb7GiRT# } "$n ff=] } nh]HEG0CZJ catch(IOException e){e.printStackTrace ();} eMLcmZJR catch(Exception e){e.printStackTrace ();} FN<Sagj C)mR~Ey =`k',V_ Utility.log(nFileLength); Ov#G 7a" U;=1v:~d m@W>ku return nFileLength; 6 u 1|pX8 } r+usMF<' #0:rBKm, /?1^&a //保存下载信息(文件指针位置) [a!)w@I: private void write_nPos() ]m :Y|,:6 { n= q7*<l try{ 6@;sOiN+ output = new DataOutputStream(new FileOutputStream(tmpFile)); ,FwJ0V output.writeInt(nStartPos.length); HF<h-gX for(int i=0;i<nStartPos.length;i++) X>i{288M3 { cAn_:^ // output.writeLong(nPos); A[`2Mnj output.writeLong(fileSplitterFetch.nStartPos); P}"T3u\N output.writeLong(fileSplitterFetch.nEndPos); 2Z-QVwa*U
} N<O<wtXIj output.close(); T7^?j :kJ/ } }LY)FT4n catch(IOException e){e.printStackTrace ();} Dqc2;> catch(Exception e){e.printStackTrace ();} bZ#5\L2 } >uxAti\ -6xh tHEZuoi //读取保存的下载信息(文件指针位置) I9<%fv private void read_nPos() @V Sr'?7- { :_h#A}8Xd try{ Fd#Zu.Np DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); VV/aec8 int nCount = input.readInt(); 4+Jf!ovS= nStartPos = new long[nCount]; mRy0zN>? nEndPos = new long[nCount]; ,hWuAu6.L for(int i=0;i<nStartPos.length;i++) {mB!mbr
{ }S;A%gYm nStartPos = input.readLong(); M }$Td_g nEndPos = input.readLong(); 7u:QT2=& } tF6-@T\6 input.close(); pM~-o? } }tQ^ch; Q catch(IOException e){e.printStackTrace ();} L9]d$ r" catch(Exception e){e.printStackTrace ();} y@r0"cvz9 } xX@9wNYD pq:[` dsg-;*% private void processErrorCode(int nErrorCode) /CUBs! { Bh&dV%' System.err.println("Error Code : " + nErrorCode); a+j"8tHu$ } R7A:K]iJ5 5n[''#D Ed+jSO0 //停止文件下载 lx7]rkWo|a public void siteStop() e|q~t
{=9S { B}J0d bStop = true; V{fG~19
for(int i=0;i<nStartPos.length;i++) yG;@S8zC fileSplitterFetch.splitterStop(); mNsd&Rk' agq4Zy :x3xeVtY } Yy;BJ_ } DPkH:X //负责部分文件的抓取 tO?-@Qf/9< **FileSplitterFetch.java f`iDF+h<6 */ av_ +M;G package NetFox; \uO^wJ} h^,av^lg^ dkeMiLm import java.io.*; 7GCxd#DJ import java.net.*; 6
$`l Xpt9$=d
qt6@]Y public class FileSplitterFetch extends Thread { 0\,! 3#Iq5vT D G|v'# String sURL; //File URL D/=k9[b! long nStartPos; //File Snippet Start Position
LnM$@ long nEndPos; //File Snippet End Position =\mJ5v"hA int nThreadID; //Thread's ID lPrAx0m13% boolean bDownOver = false; //Downing is over [7 NO !^ boolean bStop = false; //Stop identical ou{V/?rb FileAccessI fileAccessI = null; //File Access interface o' v!83$L { `xC~B h fWb+08}C public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p 16+(m { +(W7hK4ip this.sURL = sURL; D;*cy<_K8 this.nStartPos = nStart; ML0_Uc3en this.nEndPos = nEnd; KzJJ@D*4M] nThreadID = id; }0f~hL24 fileAccessI = new FileAccessI(sName,nStartPos);//定位 RS#C4NG } =pTTXo j WMTQLE. Z$B%V t public void run() :G]t=vr1 { 8'NT_NPNb while(nStartPos < nEndPos && !bStop) x 0#u2j?zj { fwlicbs ' LOr( HgyC hc|#JS2H@y try{ _g-0"a{- URL url = new URL(sURL); WQ9Q:F2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gVy`||z httpConnection.setRequestProperty("User-Agent","NetFox"); U9*< dR String sProperty = "bytes="+nStartPos+"-"; z`NJelcuz\ httpConnection.setRequestProperty("RANGE",sProperty); ;*ni%|K Utility.log(sProperty); Wyow MFp hztqZ: w9mAeGyE InputStream input = httpConnection.getInputStream(); [_}8Vv&6 //logResponseHead(httpConnection); Rf2mBjJ(z Xbrc_V\_ WJ LqH< byte[] b = new byte[1024]; }%<_>b\ int nRead; Mz86bb^J while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) VvT7v] { F,Ve, 7kh nStartPos += fileAccessI.write(b,0,nRead); Ix<!0!
vk //if(nThreadID == 1) UoUQ6Ij // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TtH!5{$s } >_ G'o 2E`mbT,v& u:6R|%1fNn Utility.log("Thread " + nThreadID + " is over!"); 2\1bQq\ bDownOver = true; ] W$V# //nPos = fileAccessI.write (b,0,nRead); * dk(<g=fM } JIHIKH-# catch(Exception e){e.printStackTrace ();} $o9@ ?2 } W BA7G } ^~6gkS
} iq^;c syKb Koj9]2<0 //打印回应的头信息 B !wr} ] public void logResponseHead(HttpURLConnection con) uBn35% { Xr'b{& for(int i=1;;i++) jSRi { UX<)hvKj String header=con.getHeaderFieldKey(i); pf+VYZ#) if(header!=null) tkkh<5{C
//responseHeaders.put(header,httpConnection.getHeaderField(header)); r .
(} Utility.log(header+" : "+con.getHeaderField(header)); 7$t['2j3 else wA)nryXV break; OVc)PMp } 2-Wy@\ } euW ;t,v/(/3 3 TTQff public void splitterStop() zSu,S4m_; { wXKt)3dm u bStop = true; E7_OI7C } '#eT {E7STLQ_% qmenj } ,A)Z.OWOq ET 0(/Zz -YmIRocx /* 2JcP4!RD **FileAccess.java 8OO[Le]1 *//文件访问(定位,写)
U0srwt97S package NetFox; &\Lu}t7Ru import java.io.*; ZLPj1L 9sd}Z,l l4(FM}0X5} public class FileAccessI implements Serializable{ &-X51O C 8V9OMOt! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [Fv,`*/sm RandomAccessFile oSavedFile; 8.7q
-<Q long nPos; !^v~hD$_q z|Yt|W Df:/r% public FileAccessI() throws IOException i1A<0W| { v-^tj}jA this("",0); fakad#O } t5u#[* wu &lG!# bNiJ"k<pN public FileAccessI(String sName,long nPos) throws IOException r4fg!]J; { )0"T?Ivp] oSavedFile = new RandomAccessFile(sName,"rw"); =6i+K.}e this.nPos = nPos; o^//|]H3Y oSavedFile.seek(nPos); F-
u"zox } H*P+>j& Zk>m!F>,p a/3'!} &e public synchronized int write(byte[] b,int nStart,int nLen) t~nW&]E { T!HAE#xC int n = -1; :nc%:z=O try{ /=A@O !l oSavedFile.write(b,nStart,nLen); rmtCCPF?0 n = nLen; [?;L } ! hEZV&y catch(IOException e) nZc6
*jiz { m_BpY9c]5 e.printStackTrace (); 7Kb&BF|Q } C8)Paop$ Aayd3Ph0% 1$6
u return n; 51H6
W/$ } |W@Ko%om {?EmO+![} |$ZS26aYw} } ZM<UiN 81(\8#./ sG[qlzR=8 /* J$sp6g>K **SiteInfoBean.java 'zT7$ .L */ a|#pl! package NetFox; 1
XJZuv,T: 4xg1[Z%: Bss*-K] public class SiteInfoBean { oIIi_yc OYn5k6 RL/7>YQ private String sSiteURL; //Site's URL ua &uR7 private String sFilePath; //Saved File's Path 1/qD5 *`Y private String sFileName; //Saved File's Name 8 ph1xQ' private int nSplitter; //Count of Splited Downloading File pY&dw4V ?hR0
MnP 8m
`Y public SiteInfoBean() aG4 ^xOD {//nSplitter的缺省值为5 zb02\xvf //default value of nSplitter is 5 6c/0OM# this("","","",5); f~TkU\Rh } 2Ur&_c6P Aw4)=-LKO x_?K6[G&} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ~i'!;'-_} { ="%887e sSiteURL= sURL; "&^KnWk= sFilePath = sPath; 7^UY%t sFileName = sName; _v,Wl/YAp this.nSplitter = nSpiltter; T
g3MPa#g &TrL!9FtJ >1]hR)Ip } sCQV-%9 ^T1caVb|> Us2> 5 :\ public String getSSiteURL() ,1JQjsR { B9cWxe4R# return sSiteURL; t7xJ" } /d Ua ) .' + { *8yC6|wL? public void setSSiteURL(String value) qD=b+\F { M
0RA& sSiteURL = value; B,Tv9(sv } *-q&~ ]W~M?1} !bnnUCTb\ public String getSFilePath() H!6&'=c {k { tI#65ox# return sFilePath; 2bw.mp&v1 } p:{L fQ o54=^@>O<j xcQ^y}JN public void setSFilePath(String value) D(dV{^} 9 { oY,{9H37b sFilePath = value; >qO l1]uF } BC1smSlJ
; 4/ n~ k+je-%hPj public String getSFileName() erTly2-SJ { 5xNOIOpDB return sFileName; a[sdYZ } -O/[c V2@(BliP ~Hj c?* public void setSFileName(String value) +2Aggv>* { ;G"!y<F sFileName = value; jO*H8XO } Qx!Bf_,J Y( EF ):: F J?]|S.?, public int getNSplitter() 8. +f@wv { N}{V*H^0QU return nSplitter; EBQ_c@ } .N\t3\9} 7X>@r"9< @$$J}~{ public void setNSplitter(int nCount) gf4Hq&Rf { qvhG^b0h nSplitter = nCount; Ep')@7^n } bun_R- } /6\uBy"Xt ?@Tsd@s~r Yc3\ /* o@aXzF2 **Utility.java _ |HA\! */ $`0,N_C<} package NetFox; M;KeY[u u3UN =_Z.x&fi public class Utility { j"zW0g!S QAY:H@Gt: +G7[(Wz(z public Utility() 7suT26C { j-FMWEp JPgFTr #E<~WpP } Cgf4E{\U! 1UB.2}/: //线程睡眠 B/hQvA;( public static void sleep(int nSecond) ?A*<Z%}1? { A4;~+L :M try{ )2Y]A^ Y Thread.sleep(nSecond); A
L|,\s } w^3S6lK catch(Exception e) U56g|V { "tpD -> e.printStackTrace (); "(';UFa } 6KN6SN$ } zd F;! &Fk|"f+ //日志 X .K*</(g public static void log(String sMsg) :inVwc { |^F$Ta System.err.println(sMsg); j*1MnP3/8Y } ^ ~Tn[w W_ ;vpq0t` W}(T5D" 3x public static void log(int sMsg) j4=\MK { ;LKYA?=/V System.err.println(sMsg); x&EMg! } rO/Sj<0^ } b!"FM/% 0}9j l k@[[vj|W /* p2+K-/}ApP **TestMethod.java k%s,(2)30 */ {!.w} package NetFox; O\%0D.HEz v&f\ Jv7 {)Wa"|+ public class TestMethod { Rdj^k^V+a1 @x*,fk >.XXB
5a public TestMethod() x{rjngp2 { ///xx/weblogic60b2_win.exe V%zo[A try{ 0B~x8f SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C}9|e?R[Rz //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $!\L6;: SiteFileFetch fileFetch = new SiteFileFetch(bean); n+vv
% fileFetch.start(); 5fmQ+2AC1 } ?PV@WrU>B catch(Exception e){e.printStackTrace ();} $8[JL\ "`a,/h' )$*B } vP%:\u:{ #9qX:*>h z>
N73 u public static void main(String[] args) 2Z`Jr/ {
"tA.`* new TestMethod(); Pt6d5EIG } _,p/2m-Pj } : 'pK 点击下载更多相关资料
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