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/* xHD!8B) **SiteFileFetch.java E"L'm0i[[ */ 3_33@MM package NetFox; E> 4
\9 import java.io.*; 8V}c(2m import java.net.*; =A!I-@]q< 8i:b~y0 X(WG:FP27 public class SiteFileFetch extends Thread { IL>g- UI8M< Pv0+`>): SiteInfoBean siteInfoBean = null; //文件信息Bean ||!k 3t#< long[] nStartPos; //开始位置 V).M\ long[] nEndPos; //结束位置 )L#I#% FileSplitterFetch[] fileSplitterFetch; //子线程对象 8=2)I. long nFileLength; //文件长度 @l;f';+ boolean bFirst = true; //是否第一次取文件 =%]dk=n?TN boolean bStop = false; //停止标志 UyF]gO File tmpFile; //文件下载的临时信息 4p1{Ady DataOutputStream output; //输出到文件的输出流 w\@Anwj#L Q7DkhKT //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Q0 ^?jh public SiteFileFetch(SiteInfoBean bean) throws IOException \7/xb{z| { |J6CH87> siteInfoBean = bean; [e*8hbS //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); N86Hn]# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]"YG7|E U if(tmpFile.exists ()) ^T<<F}@q { wiFckF/
bFirst = false; 3gGF?0o read_nPos(); ,YiBu^E9 } sxuYwQ else O^IpfS\/ { =XWi+') nStartPos = new long[bean.getNSplitter()]; +Uk/Zg
w^ nEndPos = new long[bean.getNSplitter()]; `GSfA0? } goxgJOiB ey Cg * 3-Ti'xM i4uUvZf } RQh4RUm SYC_=X \
(X~Z public void run() K(Cv9YQ { 7d9%L}+q //获得文件长度 p oNQ<ijK //分割文件 &1VC0"YJWy //实例FileSplitterFetch g@S"!9[;U //启动FileSplitterFetch线程 ,7/N=mz //等待子线程返回 \Mi y+<8$ try{ WO
'33Q( if(bFirst) eR;cl$ { hsVWD,w nFileLength = getFileSize(); ]^.#d if(nFileLength == -1) ^Ji5)c { m+V'*[O{ System.err.println("File Length is not known!"); 3UBG?%!$f } Q Zd
,GY5{ else if(nFileLength == -2) )WBTqML[ { q,+d\-+ System.err.println("File is not access!"); ,!Q2^R } ^Dd$8$?[ else 'GNT'y_ { \]o#tYN\a0 for(int i=0;i<nStartPos.length;i++) \5O4}sm$* { a[t2TjB nStartPos = (long)(i*(nFileLength/nStartPos.length)); Rb\\6BU0 } WzZb-F for(int i=0;i<nEndPos.length-1;i++) 4GaF:/ { +e4o~p nEndPos = nStartPos[i+1]; &{"aD& } k+%6:r,r& nEndPos[nEndPos.length-1] = nFileLength; Au:Q4x. } ,qt9S0QS } p"Fj6T2 !7Ta Vx}`( Lymy/9 //启动子线程 Rl -Sr fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; H}X3nl\] for(int i=0;i<nStartPos.length;i++) 8g&uCv/Uk { 41,Mt fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $c[8-= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), HPm12&8, nStartPos,nEndPos,i); )CEfG Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hesL$Z [ fileSplitterFetch.start(); 91e&-acA } EubF`w$KWX // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I=|b3- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); G'Jsk4:c // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", XkOsnI8n nEndPos = " + nFileLength); a\aJw[d{ // fileSplitterFetch[nPos.length-1].start(); b=`h""u g!cTG-bh>J )"wWV{k //等待子线程结束 ojUBa/ //int count = 0; GR Rv0M //是否结束while循环 9UZKL@KC boolean breakWhile = false; 3<CCC+47 MAQkk%6[g !A, ] while(!bStop) 5fA<I _ D { $62!R]C9\ write_nPos(); =gw'MA Utility.sleep(500); m "h{HgJd breakWhile = true; "i(k 8+iK -:dUD1 j0~]o})@i for(int i=0;i<nStartPos.length;i++) 8:|F'{<<b { 7q^osOj" if(!fileSplitterFetch.bDownOver) a4Fe MCvV9 { :4;ZO~eq! breakWhile = false;
a2SMNC] break; #Huvn4x } /Z94<}C6b } ]EC zb/ if(breakWhile) R6r'[-B2 break; Ux2(Oph Q
&<:W4N* J 6D?$ //count++; x$tx!%,)/S //if(count>4) =c"`>Vi@d // siteStop(); D .oX>L#: } #H fvY}[o ?~Fk_#jz,@ g[!t@K System.err.println("文件下载结束!"); N0,wT6. } DpI)qg#>V catch(Exception e){e.printStackTrace ();}
0GK<l } )
wtVFG KuL2X@)} BqC!78Y/e //获得文件长度
<C`qJP- public long getFileSize() AKk6kI8F { $vlq]6V8 int nFileLength = -1; -,C">T%\ try{ jCa%(2~iQ7 URL url = new URL(siteInfoBean.getSSiteURL()); /g BB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }OZp[V httpConnection.setRequestProperty("User-Agent","NetFox"); [p^N].K$ .&:y+Oww~ U` uP^ int responseCode=httpConnection.getResponseCode(); >~8;H x].d if(responseCode>=400) `$vTGkGpY { [DpGL/Y. processErrorCode(responseCode); ?-1r$z
return -2; //-2 represent access is error W ZdEfY{ } e33 j&:O FR&4i" + bw\fKZ String sHeader; |WqEJ*$, 1BO$xq 1RpTI7 for(int i=1;;i++) `?r]OVe{y { eM
Ym@~4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,#:* dl //Utility.log(in.readLine()); yV[9 ( sHeader=httpConnection.getHeaderFieldKey(i); v6(Yz[ if(sHeader!=null) D!<[\G { $N4%I4 if(sHeader.equals("Content-Length")) =oQw?,eY
{ A(zF[\{] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Yt*2/jw^ break; uTTM%-DMHT } ^K*uP^B= } 41Bp^R}^/ else hqrI%% break; A[)od } b~dm+5W7 } D#Fe\8!l catch(IOException e){e.printStackTrace ();} )NAC9:8! catch(Exception e){e.printStackTrace ();} AT Dm$ * '?7th>pC DID&fj9m Utility.log(nFileLength); 9ZFvN*Zf' tVVnQX v0hr ~1 return nFileLength; <q|IP_ } ]4~-
z3=y ."b=dkx 2c:H0O
0o //保存下载信息(文件指针位置) y
Nb&;E7 H private void write_nPos() JA0$Fz { b[p<kMTir try{ tTrUVuZ output = new DataOutputStream(new FileOutputStream(tmpFile)); ZfalB output.writeInt(nStartPos.length); \|^fG9M~ for(int i=0;i<nStartPos.length;i++) 0w^\sf%s { w20E]4" // output.writeLong(nPos); @gzm4 output.writeLong(fileSplitterFetch.nStartPos); f5D.wSY output.writeLong(fileSplitterFetch.nEndPos); 5c6CH k`: } k<W n output.close(); p_h)|*W{ } F jdh&9Zc catch(IOException e){e.printStackTrace ();} eveGCV;@ catch(Exception e){e.printStackTrace ();} Ij;= } lOp/kGmn+ 2}`Q9? Vlb L
p; //读取保存的下载信息(文件指针位置) pl62mp! private void read_nPos() `L0aQ$'>z { /E>z8J$ try{ pL` snVz DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Q]X0O10 int nCount = input.readInt(); 7s:`]V% nStartPos = new long[nCount]; "o#N6Qu71 nEndPos = new long[nCount]; L8- for(int i=0;i<nStartPos.length;i++) MU5@(s3B? { : sIZ+3 nStartPos = input.readLong(); etF?,^)h=g nEndPos = input.readLong(); 7O5`&Z'- } +kCVi input.close(); ]PdpC" } b:fy catch(IOException e){e.printStackTrace ();} $$YLAgO4 catch(Exception e){e.printStackTrace ();} pGw|T~e% } /bA\O
Sd'Meebu 2,|*KN*e`W private void processErrorCode(int nErrorCode) DJgk"' { Zrfp4SlZZ System.err.println("Error Code : " + nErrorCode); 9/C0DDb } Y{y #us1 bu"Jb4_a> [o&Vr\.$ //停止文件下载 r$ue1bH}| public void siteStop() }8WpX2U { j9C=m"O bStop = true; K8*QS_* for(int i=0;i<nStartPos.length;i++) J)(H-xvV fileSplitterFetch.splitterStop(); EK.L>3 G[u_Uu=> z.23i^Q } EVmQ"PKL' } (_]{[dFr% //负责部分文件的抓取 BXueOvO8 **FileSplitterFetch.java Jl3l\I' */ KmV#%
d package NetFox; SqY;2: k1>%wR mm%w0dOb" import java.io.*; qcke8Q import java.net.*; `h5HA-ud ] d| -r:4 `(aU_r= public class FileSplitterFetch extends Thread { Q"8)'dL' Kbx (^f12 /6F 1=O(c> String sURL; //File URL BieII$\P%P long nStartPos; //File Snippet Start Position !_<. 6ja long nEndPos; //File Snippet End Position `ZN@L<I6 int nThreadID; //Thread's ID u]E% R& boolean bDownOver = false; //Downing is over $Z10Zf= boolean bStop = false; //Stop identical (o^V[zV FileAccessI fileAccessI = null; //File Access interface _wM[U`H}s H*|Bukgt/M nL^6{I~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'DsfKR^s { V]H<:UE this.sURL = sURL; M;zRf3S this.nStartPos = nStart; R2Tvo?xI7 this.nEndPos = nEnd; O~d!*A nThreadID = id; eJ{"\c( fileAccessI = new FileAccessI(sName,nStartPos);//定位 SfJ/(q } <!X'- >i%q !QVd'e hl}#bZ8] public void run() ABhza| { f;u;hQxs while(nStartPos < nEndPos && !bStop) PyYKeo= { ygpC1nN mm#U a/~1u R$,`}@VqZ3 try{ 1I3u~J3]/ URL url = new URL(sURL); yF0,} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JPQ02&e httpConnection.setRequestProperty("User-Agent","NetFox"); +Q-~~v7, String sProperty = "bytes="+nStartPos+"-"; @{I55EQ] httpConnection.setRequestProperty("RANGE",sProperty); .U5+PQN Utility.log(sProperty); f+xGf6V @T/C<- /: n^&QOII@> InputStream input = httpConnection.getInputStream(); 8GlH)J+kq //logResponseHead(httpConnection); I]SR.Yp% fY%Sw7ql< D4#,9?us byte[] b = new byte[1024]; )CR8-z1` int nRead; )STt3. while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =j;o,
J:( { '2[ _U&e nStartPos += fileAccessI.write(b,0,nRead); njUM>E,' //if(nThreadID == 1) w4L\@y3 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D@
=.4z } ?!~au0 {7/6~\'/@ fI$,?> Utility.log("Thread " + nThreadID + " is over!"); `SW`d<+L bDownOver = true; yAi4v[ //nPos = fileAccessI.write (b,0,nRead); 8#Z$}?W } _4E+7+ catch(Exception e){e.printStackTrace ();} =Fj:#s } 3"L$*toRA } IL%&*B \17)=W Ue,"CQ6H //打印回应的头信息 V;:A& public void logResponseHead(HttpURLConnection con) $(CHwG- { T3?kabbF for(int i=1;;i++) H`io|~Q { / TJTu_# String header=con.getHeaderFieldKey(i); A1'IK. if(header!=null) "t\9@nzdX //responseHeaders.put(header,httpConnection.getHeaderField(header)); m",bfZ Utility.log(header+" : "+con.getHeaderField(header)); ih YfWG| else 0?`#ko7~d break; 15s?QSKj } 6)bfd^JYn } 1^W Aps Ys3C'Gc ~~fL`" public void splitterStop() dF?pEet?2 { X|q0m3jt bStop = true; ftH
0aI } B " B bFJn-g n LnyA 5T } ,`Mlo #UI`G3w< 2'}2r ~6 /* x
p$0J<2 **FileAccess.java 34l=U? *//文件访问(定位,写) mcR!P~"i package NetFox; kN) pi " import java.io.*; V('b|gsEo ~G$OY9UC zld>o3K} public class FileAccessI implements Serializable{ Fca?'^X nbRg<@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >L(F{c: RandomAccessFile oSavedFile; z>&D~0 long nPos; tO0+~Wm @kK=|(OB' YS~x-5OE\ public FileAccessI() throws IOException *Xo f;)Z^ { }B.C#Y$@ this("",0); eyG.XAP } [/kO> lt]U?VZ . =5Jpo public FileAccessI(String sName,long nPos) throws IOException d"cfSH;h { GhT7:_r~ oSavedFile = new RandomAccessFile(sName,"rw"); \X`P
W this.nPos = nPos; .`p_vS9 oSavedFile.seek(nPos); -I*A `M } SM<kE<q# lyPXlt %qHT!aP public synchronized int write(byte[] b,int nStart,int nLen) n"
~*9' { gdT_kb5HL8 int n = -1; ;0*^9 8K try{ Rb0{t[IU oSavedFile.write(b,nStart,nLen); 4s8E:I=K n = nLen; `iI"rlc } 4tU~ ^z catch(IOException e) n\YxRs7
hF { Ss:,#| e.printStackTrace (); K6U>Qums } xRUYJ=|oh Dfo9jYPf X3nhqQTZ return n; l_%~X9" } ("6W.i> Y Pc< SDwSlwf } (?!0__NN; 6~S0t1/t? [
lW
" M /* -Tx tX8v **SiteInfoBean.java o0L#39`'g */ D2p6&HNT package NetFox; c5R{Sl G= cxc_9 \sd"iMEi public class SiteInfoBean { Y
zS*p~| mW-W7-JhO7 E2IV R]C2^ private String sSiteURL; //Site's URL M<unQ1+wh private String sFilePath; //Saved File's Path ArYF\7P private String sFileName; //Saved File's Name 5KR|p Fq private int nSplitter; //Count of Splited Downloading File O:)IRB3 g-FZel
^mpB\D)q public SiteInfoBean() NO^t/(Z {//nSplitter的缺省值为5 @U{M"1zZe //default value of nSplitter is 5 GJs[m~`8# this("","","",5); RH Vv}N0 } S$52KOo GuWBl$|+b HW726K* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) PEEY;x { 7V
(7JV<> sSiteURL= sURL; vs|6ww sFilePath = sPath; #\BI-zt sFileName = sName; k+$4?/A this.nSplitter = nSpiltter; G3+a+=e L0b]^_tI 03WRj+w } 2TEeP7 ~q(C j"7 ~^~RltY public String getSSiteURL() tcEf
~|3 { 7 afA'.= return sSiteURL; YO$b# } -_DiD^UcXn jA4v?(AO}# \BaN5+B6 public void setSSiteURL(String value) h<ct W>6v { n "KJB sSiteURL = value; OW}j4-~wL } H)T# R? BC{J3<0bf@ OCO,-( public String getSFilePath() t0H=NUP8 { L_ qv<iM$ return sFilePath; 5zw23! } 8sF0]J[g{ p]|ME G!LNP&~ public void setSFilePath(String value) vKf;&`^qE { ^%$W S, sFilePath = value; u$,Wyi )L } MQH8Q$5D |ezO@ Ox*T:5 public String getSFileName() [-Tt11 { :G=1$gb return sFileName; _&Uo|T } Y1_6\zpA +6)kX4 nB Iv{ public void setSFileName(String value) YSz$` 7i { xKLcd+hCZ sFileName = value; .'{6u;8 } dms:i)L2 y#Za|nt aco}pXz public int getNSplitter() (9 z.IH7}k { Ta\8>\6 return nSplitter; 3g#=sd!0O@ } '"fU2M<. ?]:EmP 2:HP5 public void setNSplitter(int nCount) A"<)(M+kG { Hs`#{W{. nSplitter = nCount; ))69a } (VXx G/E3 } K-Dk2(x ':2*+ pT;-1c%: /* k1Mxsd **Utility.java ~iR!3+yg4 */ Up/u|A$0V package NetFox; cM<hG:4%wX MHr0CYyb.
k E#_Pc public class Utility { ;'Vipj A]O5+"mc #9hXZr/8 public Utility() ~SR(K{nf#. { vLK\X$4 >]XaUQ- >upXt? } :
`6$/DK
Eagmafu //线程睡眠 Z>w^j.( public static void sleep(int nSecond) D_19sN@0m { q{De&Bu try{ Rqb{)L
X* Thread.sleep(nSecond); hA1gkEM2o } ({H+ y
9n catch(Exception e) &DbGyV8d"| { gcW{]0%L^ e.printStackTrace (); C>`.J_N } WP%{{zR$ } ),y!<\oQ bUAR<R'E //日志 z5yb$-j public static void log(String sMsg) +%le/Pg@ { nzE,F\k System.err.println(sMsg); {7Gx9( } (9YYv+GGd* '[=yfh gM;) public static void log(int sMsg) EDgob^> { [nN\{"~O System.err.println(sMsg); LE0J ;|1 } Fyh?4!/. } mOz&6T<| V$Xl^# tN &8X
.!r`f /*
ENYF0wW **TestMethod.java m_E[bDON */ M]4 =(Vv+5 package NetFox; )ZgER[ C$'D]fX 68J 9T^84 public class TestMethod { ,>QMyI
hv L)R[)$2(g _@BRpLs:4 public TestMethod() Hlt8al3 { ///xx/weblogic60b2_win.exe !0!U01SWa try{ ,{uW8L SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~_l6dDJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 'd2qa`H'}B SiteFileFetch fileFetch = new SiteFileFetch(bean); D 8@nkSP fileFetch.start(); 4[LLnF-- } 6=G~6Qu catch(Exception e){e.printStackTrace ();} ==h|+NFa )y%jLiQv E VN-<=i^ } [w+h-q cD'HQ3+ f.aB?\"f6 public static void main(String[] args) !^)wPmk { J0ZxhxX35 new TestMethod(); sFQ4O- SM } !cEbzb } G%P>Ag 点击下载更多相关资料
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