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/* 4pC.mRu
0 **SiteFileFetch.java ~|. vz!A */ $Oi@B)=4d+ package NetFox; = 6^phZ( import java.io.*; 3e7P
w`gLl import java.net.*; \&.]!!Q 1k?k{Ri iES?}K/q public class SiteFileFetch extends Thread { a[A9(Ftn Y=YIz>u -9> oB SiteInfoBean siteInfoBean = null; //文件信息Bean 8}<4f|? long[] nStartPos; //开始位置 {v~.zRW%]r long[] nEndPos; //结束位置 N_eZz#); FileSplitterFetch[] fileSplitterFetch; //子线程对象 1GI/gc\ long nFileLength; //文件长度 7-`iI(N< boolean bFirst = true; //是否第一次取文件 ?/ Cl boolean bStop = false; //停止标志 jk-e/C File tmpFile; //文件下载的临时信息 |A% Jx__ DataOutputStream output; //输出到文件的输出流 G~fM!F0 uIb,n5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) p`}'-A|@ public SiteFileFetch(SiteInfoBean bean) throws IOException +ew9%={zB { Ql.abU siteInfoBean = bean; ^;gwD4(hs //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); M8}t`q[-& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); f_qW+fN::s if(tmpFile.exists ()) M->$'Zgh` { AV:P/M^B bFirst = false; 6|AD]/t^K read_nPos(); "l.1 UB& } 41Htsj else >4@/x{{ { L6E8A?>5rD nStartPos = new long[bean.getNSplitter()]; dyNKok# nEndPos = new long[bean.getNSplitter()]; UthH } K6X}d,g "Acc]CqH* Q ]F81N(@:F } =vc8u&L2 -T+7u 1w/Ur'8we public void run() _)6 N&u8 { @ky<5r*JU( //获得文件长度 <JNiW8 PG //分割文件 S#wy+* //实例FileSplitterFetch kvo V?<! //启动FileSplitterFetch线程 N+M^e`H //等待子线程返回 MzudCMF try{ V.U9Q{y" if(bFirst) rjLPX { wSwDhOX= nFileLength = getFileSize(); F:B8J4/ if(nFileLength == -1) MrGq{,6C { -=)Al^V4T System.err.println("File Length is not known!"); @;K-@*k3 } s%c>Ge else if(nFileLength == -2) 4T<4Rb[ { JX! @j3 System.err.println("File is not access!"); &3t[p= } 3j2#'Jf|: else $VRVMY [q { WXzSf.8p| for(int i=0;i<nStartPos.length;i++) dW`!/OaQD { GL<u#[ nStartPos = (long)(i*(nFileLength/nStartPos.length)); -fILXu } iF#|Z$g-( for(int i=0;i<nEndPos.length-1;i++) 2V6kCy@V { q*E<~!jL nEndPos = nStartPos[i+1]; xq<3*Bcw } d$}z,~sN nEndPos[nEndPos.length-1] = nFileLength; ~ WO } ccPTJ/%$ } jqeR{yo&0b *fj5$T-Z t5"g 9`A L //启动子线程 !um~P fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; T1YCld for(int i=0;i<nStartPos.length;i++) *@1(!A { 5zf bI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yJRqX]MLA siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !Yi2g-( nStartPos,nEndPos,i); NZW)$c' Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Pn| ;VCh fileSplitterFetch.start(); 2^;zj0]Rt } )4tOTi[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L)qDtXd4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
'K7m!y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \Hs*46@TC nEndPos = " + nFileLength); P]mJ01@' // fileSplitterFetch[nPos.length-1].start(); P1u(0t 49?wEm# rY,zZR+@ //等待子线程结束 ]I<w;.z //int count = 0; `$oy4lDKQ //是否结束while循环 5ca!JLs boolean breakWhile = false; LyuA("xB# Qt+i0xd V7}]39m(s while(!bStop) 089 <B& < { z55g'+Kab write_nPos(); W Yo>Md
8 Utility.sleep(500); ~4V-{-=0a7 breakWhile = true; gCL?{oVU 3o^~6A ;#XF.l,u for(int i=0;i<nStartPos.length;i++) $No^\.mV { e,DRQ2AU if(!fileSplitterFetch.bDownOver) O/b1^
Y
{ k((kx: breakWhile = false; 0 H0U%x8 break; i*jnC> } Min{&?a } I1 +A$<Fa if(breakWhile) #\l#f8(l break; &\iMIJ- C1w6[f1+ me
YSW //count++; U_C[9Z'P //if(count>4) O[j$n // siteStop(); H.]p\UY9 } 044Q>Qz, :2*0Jh3_ @>q4hYF System.err.println("文件下载结束!"); -_^#7] } Y;1s=B9 catch(Exception e){e.printStackTrace ();} u-u:7VtH0= } U7xKu75G1 |<2<`3 J;S Z"I' //获得文件长度 t3<HE_B| public long getFileSize() kk$D:UQX { ?Ll1B3f int nFileLength = -1; '>:%n try{ k[a5D/b URL url = new URL(siteInfoBean.getSSiteURL()); sp7#e%R\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -#`tS httpConnection.setRequestProperty("User-Agent","NetFox"); 3U9leY'2N L~!Lq4]V\g 0
} |21YED int responseCode=httpConnection.getResponseCode(); (YY!e2 if(responseCode>=400)
MZ%S3' { %4x,^ K] processErrorCode(responseCode); Ij?Qs{V return -2; //-2 represent access is error d;g]OeF } S9E<)L p>1Klh:8.' xMA2S*%ca String sHeader; *t bgIW+h 7b*9
Th*a IN=l|Q$8f for(int i=1;;i++) IXU~&5&J { }+fBJ$ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,T8fo\a4 //Utility.log(in.readLine()); ow7*HN* sHeader=httpConnection.getHeaderFieldKey(i); c8oE,-~ if(sHeader!=null) +:3p*x%1H { )VeeAu)p if(sHeader.equals("Content-Length")) X<uH [ { NC%)SG \ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); OyATb{`' break; yJ2A!id } ,ik\MSS } s@K #M else RJE<1!{ break; [(iJj3s! } jTN!\RH9NF } Z9UNp[0 catch(IOException e){e.printStackTrace ();} eo<=Q|nI& catch(Exception e){e.printStackTrace ();} GC)xQZU)s P`y 0FKS I{7Hz{ Utility.log(nFileLength); `r+`vJ$ ]64?S0p1c! Q@-
h return nFileLength; H1 e^/JD) } k-8$43 WO+_|*& 4p]hY!7 //保存下载信息(文件指针位置) x<>In"QV private void write_nPos() q&@q/9kz { .xg, j{%( try{ {3G2-$yb output = new DataOutputStream(new FileOutputStream(tmpFile)); }O8#4-E_Ji output.writeInt(nStartPos.length); Os)}kkja for(int i=0;i<nStartPos.length;i++) D1~3 3; { a*?,wmzl // output.writeLong(nPos); =aRE
output.writeLong(fileSplitterFetch.nStartPos); F17nWvF output.writeLong(fileSplitterFetch.nEndPos); ^:]~6p# } cp5 output.close(); Am)XbN')1 } gg QI catch(IOException e){e.printStackTrace ();} q6zKyOE catch(Exception e){e.printStackTrace ();} h9j/mUwV } oT[8Iu z/t+t_y ym6gj#2m //读取保存的下载信息(文件指针位置) QE~#eo private void read_nPos() wIK&EGQ { [ FNA: try{ `YPNVm<3) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =xPBolxm5U int nCount = input.readInt();
Y 9~z7 nStartPos = new long[nCount]; usOIbrQ nEndPos = new long[nCount]; S<DS|qOo for(int i=0;i<nStartPos.length;i++) >TwL&la { P*6&0\af| nStartPos = input.readLong(); MUqV$#4@I nEndPos = input.readLong(); (C!33s1 } /@f3|L<1@V input.close(); ]z5gC`E0 } Hv<jf38 catch(IOException e){e.printStackTrace ();} 5Y(f7,JX catch(Exception e){e.printStackTrace ();} qY%{c-aMA } TkV*^j5 e"6!0Py#* \&5t@sC private void processErrorCode(int nErrorCode) CDgu`jj%] { % yP*Vp,W System.err.println("Error Code : " + nErrorCode); ^FN(wvqb8 } \F8*HPM=* $K*&Wdo tJ@5E^'4 //停止文件下载 exL<cN public void siteStop() yXL]uh#b { PH3#\
v.
bStop = true; PV/SzfvIq for(int i=0;i<nStartPos.length;i++) Mwd(?o fileSplitterFetch.splitterStop(); o;2QZ"v M}BqSzd* \hFIg3 } >$p|W~x } cQldBc //负责部分文件的抓取 l]v>PIh~N **FileSplitterFetch.java Rjz~n38. */ :Vx5%4J package NetFox; -A17tC20J1 \t
04- H}B%OFI \+ import java.io.*; Ye) F{WqZ# import java.net.*; B&RgUIrFoY uQlQ%n% 0N19R 5NN8 public class FileSplitterFetch extends Thread { nnPY8pdjSD T?'Vb o$-!E(p String sURL; //File URL XB'PEvh8 long nStartPos; //File Snippet Start Position by8~'? long nEndPos; //File Snippet End Position oN6X]T<
int nThreadID; //Thread's ID M;K%=l$NG boolean bDownOver = false; //Downing is over fG*366W boolean bStop = false; //Stop identical \%+5p"Z< FileAccessI fileAccessI = null; //File Access interface
uRfFPOYH dy^ zOqc BR [3i}Ud public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c})f&Z@< { wA;Cj this.sURL = sURL; (5(TbyWwD this.nStartPos = nStart; 9akIu.H this.nEndPos = nEnd; _r&,n\
T nThreadID = id; 'lD"{^ fileAccessI = new FileAccessI(sName,nStartPos);//定位 L\Y4$e9bF8 } ;}k9YlQrN 8e3I@mv HRxA0y= public void run() YB1uudW9 { R:t>PFwo while(nStartPos < nEndPos && !bStop) }{.0mu9 { a2'f#[as b
qNM ;5 JzrbtL try{ _wKaFf URL url = new URL(sURL); oe{K0.` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nVt,= ?_ U httpConnection.setRequestProperty("User-Agent","NetFox"); U4*Q;A# String sProperty = "bytes="+nStartPos+"-"; ^*=.Vuqy httpConnection.setRequestProperty("RANGE",sProperty); 08TeGUjJ Utility.log(sProperty); yMoV|U6 _pS|bqF @ = M:RA InputStream input = httpConnection.getInputStream(); swh8-_[c/ //logResponseHead(httpConnection); OEFALt H<`<5M 8 ;9rS[$^$O byte[] b = new byte[1024]; "bC1dl< int nRead; k6?;D_dm while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [R~`6 { nPU=n[t8O nStartPos += fileAccessI.write(b,0,nRead); J*} warf& //if(nThreadID == 1) s}3`%?,6y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m=hUHA,p4 } <)dHe: ;mAlF>6]\ {5,
]7 =] Utility.log("Thread " + nThreadID + " is over!"); _^5OoE"}! bDownOver = true; gx',~ //nPos = fileAccessI.write (b,0,nRead); j aEUz5 } TC+L\7 catch(Exception e){e.printStackTrace ();} ZcLW8L } WQ1~9# } muJR~4 88l\8k4r RMvq\J}w! //打印回应的头信息 2`;&Uwt public void logResponseHead(HttpURLConnection con) C@3`n;yZ= { _vV3A3|Ec, for(int i=1;;i++) v{[:7]b_= { t)
:'XGk@ String header=con.getHeaderFieldKey(i); i l5Qo if(header!=null) DQy<!Wb+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); bk}'wcX<+] Utility.log(header+" : "+con.getHeaderField(header)); %qYiE!%& else t3//
U# break; ;n~-z5) } [ u.r]\[J } x[_SNX" O;dtz\ 'fIoN% public void splitterStop() f~0CpB*X { # zbAA<f bStop = true; z?DI4O#Up } ^.HvuG},O :+qd>;yf# 3Hd~mfO\ } &{uj3s&C
nign"r 45aUz@ /* \QvoL **FileAccess.java wJ%;\06 *//文件访问(定位,写) {)?:d6" package NetFox; 9k.5'# import java.io.*; };Oyv7D+b V*<`!w ("r\3Mvs public class FileAccessI implements Serializable{ .V
3HEm-pok //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 L GdM40 RandomAccessFile oSavedFile;
B8~JUGD long nPos; X;&Iu{&= <c77GimD? QB.QG!@ public FileAccessI() throws IOException JJZu%9~[ { >2t.7UhDI this("",0); d2a*xDkv } YLsOA`5X 2if7|o$= MfA@)v public FileAccessI(String sName,long nPos) throws IOException /Bw
<?: { q)j_QbW) oSavedFile = new RandomAccessFile(sName,"rw"); TKe\Bi this.nPos = nPos; D>fg oSavedFile.seek(nPos); [p+-]V } C==yl"w v8} vk]b .sCj3sX* public synchronized int write(byte[] b,int nStart,int nLen) VtN1 [} { \'Q rJ ?D int n = -1; { )-8P try{ !sG#3sUe[ oSavedFile.write(b,nStart,nLen); (hJ&`Tt n = nLen; 4OaU1Y[ } tiGBjTPt catch(IOException e) jP{&U&!i { yiw4<]{IX e.printStackTrace (); gHo sPY[ } lz7?Z }6_*i!68"U %b[>eIJU# return n; Xwo%DZKN } ;=p3L<~c`K ![i)_XO $*Kr4vh } Yu$QL@ `y|_hb jNvDE}' /* w*M&@+3I **SiteInfoBean.java %E\zR/ */ X- ZZLl# package NetFox; V,h}l" (^NYC$ZxM= SK*z4p public class SiteInfoBean { 3;RQ\{eM R4y]<8} M$48}q+ private String sSiteURL; //Site's URL ZZn$N- private String sFilePath; //Saved File's Path j'k
< private String sFileName; //Saved File's Name `/O AgV"` private int nSplitter; //Count of Splited Downloading File a$j ~YUG_ )qRH?Hsb7 Vel}lQD public SiteInfoBean() %s! |,Cu {//nSplitter的缺省值为5 H76iBJ66 //default value of nSplitter is 5 s IFE:/1, this("","","",5); g<N;31:c\ } ^)(-7H B<Q)z5KK .P
<3+ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) byFO^pce {
l*?_ @ sSiteURL= sURL; Z]e`bfNnI sFilePath = sPath; +Bf?3 5LP sFileName = sName; s&hr$`V4 this.nSplitter = nSpiltter; lA pZC6Iwk P8(hHuO ^Z-oO#)h# } uzI=.j u"uL,w
1- [!De|,u(^ public String getSSiteURL() 57~y 7/ 0 { Ptc+ypTu return sSiteURL;
ny
cn } <iA\ZS: %q}[ZD/HD /w1M%10 public void setSSiteURL(String value) E.Q]X]q { |AH>EXhv sSiteURL = value; :KgH7s} } DXo]O}VF S,j. ?u*! f S[-K?K public String getSFilePath() &s(J:P$! { =W &Mt return sFilePath; V2!0),]B } !~&&&85 xeL"FzF:V S=0DQ19 public void setSFilePath(String value) *s,[Uy![ { lLp,sNAj sFilePath = value; :r@t ' } `%
QvCAR -72EXO=| 1~'jC8&J public String getSFileName() 9vz\R-un { cGiL9|k return sFileName; *f3S tX } +J|H~` |{&M#qXe @)BO`;*$fF public void setSFileName(String value) WR3,woo { `sCn4-$8 sFileName = value; ,sIC=V + } .[}G{%M~[ "(3u)o9 0'Si
^>bW public int getNSplitter() Z,/K$;YWo { <n4` #d return nSplitter; e{7\pQK } Bb:C^CHIQm qa-FLUkIk! r=&,2meo public void setNSplitter(int nCount) qXg&E}]:= { 'S1u@p,q nSplitter = nCount; G[\TbPh } J09jBQ]R } kDE-GX"Y ~\mh\a& i1|>JM[V /* .G8>UXX **Utility.java K
J\kR */ 6q\*{_CPB package NetFox; 8f/KNh7#s z7ik/>d? _Z Sp$>)/ public class Utility { Bl*}*S PU ~%8P0AP %\v8FCb public Utility() aknIrblS\ { &yvvea] F)(^c gLB(A\yG } |ZL?Pqki {2h*NFp //线程睡眠 b!P,+!< public static void sleep(int nSecond) CtXbAcN2B { V6X )L>!xx try{ '< U&8?S Thread.sleep(nSecond); -B H/)$-$ } O|V0WiY< catch(Exception e) A<ds+0 { uYMn VE" e.printStackTrace (); Xj
1Oxm42 } :YI5O/gsk? } =3.dgtH wX0D^)NtF //日志 kU[hB1D5 public static void log(String sMsg) F#gA2VCm { l!f_ +lv System.err.println(sMsg); Qds<j{2 } rXi&8R[ s`jlE|jtN n.&7lg^X public static void log(int sMsg) SO=gG 2E {
xgcxA: System.err.println(sMsg); Cgx:6TRS } k1<^Ept } gS5REC4I/ !?nO0Ao-$ KClkPL!jP /* %dzt'uz **TestMethod.java TP
rq:"K */ NX&dJ
6a package NetFox; He(65ciT<O XgC^-A w f6%k;R.Wz public class TestMethod { 9j:]<?D,A kk /#&b2 XM`GK>*aC( public TestMethod() ?$|tT\SFV { ///xx/weblogic60b2_win.exe 0f6o0@ try{ d}\]!x3t SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ryL1<u
~ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); S=_u3OH0 SiteFileFetch fileFetch = new SiteFileFetch(bean); 9wYm(7M6 fileFetch.start(); ~_fc=^o } wa8jr5/k" catch(Exception e){e.printStackTrace ();} a9-Mc5^'n NPK; M0w Uis:` } = LNU%0m qWhW4$7x Y~vk>ZC public static void main(String[] args) H?=W]<!W{y { :1A:g^n new TestMethod(); W3,r@mi^s7 } Ddr.6`VJ } gAD f9x"b 点击下载更多相关资料
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