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/* !RMS+Mm? **SiteFileFetch.java g5}7y\ */ pcpxe&S package NetFox; FLbZ9pX} import java.io.*; ?[SVqj2- import java.net.*; S:97B\u`
D0%FELG05 0VG=?dq public class SiteFileFetch extends Thread { )1z4q` O)<r>vqe} 9".Uc8^p/F SiteInfoBean siteInfoBean = null; //文件信息Bean 8&Wx@QI long[] nStartPos; //开始位置 "Z9^} long[] nEndPos; //结束位置 wiV&xl FileSplitterFetch[] fileSplitterFetch; //子线程对象 5Fe-=BX( long nFileLength; //文件长度 Qx.jCy@ boolean bFirst = true; //是否第一次取文件 4!'1/3cY boolean bStop = false; //停止标志 $MT}l
File tmpFile; //文件下载的临时信息
kgc.8 DataOutputStream output; //输出到文件的输出流 %F3}/2
sL~, //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ar~{= X public SiteFileFetch(SiteInfoBean bean) throws IOException \]a uSO { PJwEA siteInfoBean = bean; 3;D?|E]1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); a(Sv,@/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); d<Dn9,G if(tmpFile.exists ()) E3tj/4:L { {{zua-F bFirst = false; r`>~Lp` read_nPos(); J[+Tj@n' } TAAR'Jz S else >C^/,/%v { 0#
UAjT3 nStartPos = new long[bean.getNSplitter()]; P%jkKE?B4 nEndPos = new long[bean.getNSplitter()]; [Yoa"K } Ltg-w\?] 7 s-`QdWX pP
oxVvG{ CRd_} } -&7=uRQk e@+v9Bs]q "o<D;lO public void run() _DrnL}9I7 { y3AL) //获得文件长度 :+1bg&wQ //分割文件 JOgmF_(>Z //实例FileSplitterFetch f-s~Q4 //启动FileSplitterFetch线程 kI]=&Rw //等待子线程返回 :7k`R62{ try{ 59/Q*7ZJ if(bFirst) y8D 8Y8B { /J8o_EV nFileLength = getFileSize(); q4zSS #]A if(nFileLength == -1) nYgx9Q"<om { &}O8w77 System.err.println("File Length is not known!"); SE-} XI\ } %N1T{ else if(nFileLength == -2) iUpSN0XkMM { KwQXA' System.err.println("File is not access!"); +}\29@{W } O{*GW0}55 else /o'oF { M +\rX1T for(int i=0;i<nStartPos.length;i++) >pa\n9=Q^ { =Y:5,.U nStartPos = (long)(i*(nFileLength/nStartPos.length)); @Z,qu2~|! } ju r1!rg% for(int i=0;i<nEndPos.length-1;i++) V 3%Krn1' { kU>#1He nEndPos = nStartPos[i+1]; k\%,xf; x } &7lk2Q\ nEndPos[nEndPos.length-1] = nFileLength; {MA@A5 } =cknE= } m_~y !__D}k, @gY'YA8m //启动子线程 EqYz,%I% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0.3^ for(int i=0;i<nStartPos.length;i++) a?l_-Fi { !HbqbS22 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 37,L**Dgs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C!`>cUhE{ nStartPos,nEndPos,i); c;nx59w]q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EGr|BLl fileSplitterFetch.start(); 9k*^\@\\x } =nw,*q + // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), YcEtgpz@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }isCvb // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8x`Kl( nEndPos = " + nFileLength); ,d3Q+9/ // fileSplitterFetch[nPos.length-1].start(); \;'_|bu3. ;}$Z
80 VoWA tNU //等待子线程结束 m]Hb+Y=;h //int count = 0; o8iig5bp //是否结束while循环 oPp!*$V boolean breakWhile = false; Qs~d_; Bi$
0{V Z8 HIQ]"Hl while(!bStop) Q>##hG:m { 5+J64_ write_nPos(); t*5z1T? Utility.sleep(500); @G7w(>_T3 breakWhile = true; QZ6[*_Z6 Ax :3} 6yy|V~5 for(int i=0;i<nStartPos.length;i++) <=#lRZW[z { )R8%wk?2 if(!fileSplitterFetch.bDownOver) A!Knp=Gw { TB;3` breakWhile = false; qr7 X-[& break; >Iu]T{QNO } (R9QBZP5 } m+;B!46 if(breakWhile) (rau8
break; <W=~UUsn K'a#M g 'Wo?%n //count++; ocb%&m;i //if(count>4) !hwzKm=%N // siteStop(); ^aGZJiyJ } l{M;PaJ`} )Ix-5084 @>qx:jx(-S System.err.println("文件下载结束!"); /5L' 9e } 8<E!rn- catch(Exception e){e.printStackTrace ();} -lJx%9> } y|&.v< BnKP7e ]}UeuF\ //获得文件长度 u=_bM2;~Z public long getFileSize() yEMX ` { !D.= 'V int nFileLength = -1; i}v}K'` try{ $.suu^>^w URL url = new URL(siteInfoBean.getSSiteURL()); )nf=eU4| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [
t>}SE httpConnection.setRequestProperty("User-Agent","NetFox"); aYv'H UE}8Rkt Jdk3)
\ int responseCode=httpConnection.getResponseCode(); Zj%B7s1A if(responseCode>=400) l044c,AW( { BLl%D processErrorCode(responseCode); _QC?:mv6- return -2; //-2 represent access is error 7/5NaUmPTt } U.zRIhA] _mIa8K; Uxj<x`<1x String sHeader; %J/fg<W1 "z{_hp{T^ ^g}gT-l% for(int i=1;;i++) :,xyVb+ { =UI,+P: //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }a #b$]Y //Utility.log(in.readLine()); .!7Fe)(x sHeader=httpConnection.getHeaderFieldKey(i); $M}k%Z
if(sHeader!=null) Ak%no3:9 { b@{%qh,C if(sHeader.equals("Content-Length")) 2|T|K?R^ { *_2O*{V nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); GY0XWUlC break; oP43 NN~ } X\c1q4oB[ } PsF- 9&_ else @1J51< x break; z$I[kR%I{ } yi
AG'[ } Zh@4_Z9n! catch(IOException e){e.printStackTrace ();} ]noP catch(Exception e){e.printStackTrace ();} Et@=Ic^E rA1zyZlz O&rD4# Utility.log(nFileLength); {|7OmslC@ 0~@L%~ " kE:T., return nFileLength; Tv*1q.MB } &2P:A k@cZ"jYA P0`>{!r6@ //保存下载信息(文件指针位置) QXIbFv private void write_nPos() )DklOEO { pR@GvweA try{ )$lSG}WD output = new DataOutputStream(new FileOutputStream(tmpFile)); @Le ^- v4 output.writeInt(nStartPos.length); n !CP_ for(int i=0;i<nStartPos.length;i++) : e0R7sj { G]m[S- // output.writeLong(nPos); *1ID`o output.writeLong(fileSplitterFetch.nStartPos); Ul7pxzj output.writeLong(fileSplitterFetch.nEndPos); @>
+^< } pZ@W6} output.close(); /`j K } eK=m0 2 catch(IOException e){e.printStackTrace ();} W=;(t catch(Exception e){e.printStackTrace ();} YN5OuKMUd' } R5'Z4.~ v4,syd*3|V =@ L5 //读取保存的下载信息(文件指针位置) 'EH private void read_nPos() Gg3?2h"d { ~'Qpf 8) try{ a\[fC=]r: DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mNBpb} int nCount = input.readInt(); x jP" 'yU nStartPos = new long[nCount]; +lDGr/ nEndPos = new long[nCount]; NBbY## w0 for(int i=0;i<nStartPos.length;i++) @tjZvRtZ { %xbz&'W, nStartPos = input.readLong(); &ls!IN nEndPos = input.readLong(); =?I1V#. } )l[7;ZIw$ input.close(); Vbqm]2o& } 1=o(sIeA catch(IOException e){e.printStackTrace ();} 3' :[i2[ catch(Exception e){e.printStackTrace ();} Bgo"JNM } 79c 9+ (
F"& A? v&CO#vK5. private void processErrorCode(int nErrorCode) f-f\}G&G { EDa08+Y System.err.println("Error Code : " + nErrorCode); U7f&N } NkjQyMF No92Y^~/ Vp{RX8?. //停止文件下载 {7M4SC@p| public void siteStop() )*$ { ~A:;?A'. bStop = true; b$`4Nn| for(int i=0;i<nStartPos.length;i++) ]B[/sqf fileSplitterFetch.splitterStop(); Q'Jpsmwu %f3Nml E{k%d39> } L[[H\ } )l!&i?h% //负责部分文件的抓取 IpaJ<~ p **FileSplitterFetch.java !i"9f_ */ dC;d>j, package NetFox; >`,#%MH# b09#+CH? K~hlwjrt import java.io.*; H@&"M% import java.net.*; I`n1M+=% yn ?U7`V EBn:[2 public class FileSplitterFetch extends Thread { .n|3A3: @l6dJ Zs K'</7 String sURL; //File URL V\7u long nStartPos; //File Snippet Start Position )mo|.L0 long nEndPos; //File Snippet End Position ?k7/`gU int nThreadID; //Thread's ID d7-F&!sQ boolean bDownOver = false; //Downing is over GL0' :LsZ boolean bStop = false; //Stop identical |sZ9/G7 FileAccessI fileAccessI = null; //File Access interface O9 Au = TXk"[>,:H ea[a)Z7# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U -^S<H { m5Laq'~0_ this.sURL = sURL; B xN#Nk~ this.nStartPos = nStart; s].Cx4VQ this.nEndPos = nEnd; wYxFjXm nThreadID = id; Z(`K6`KM fileAccessI = new FileAccessI(sName,nStartPos);//定位 @Oc}\Rg } _q!ck0_ V@s/]|rf, k}a!lI: public void run() 0BwQ!B. { Zo6a_`)d while(nStartPos < nEndPos && !bStop) E6IL,Iq9 { g8@i_ _"e(
^yiK '
xq5tRg> try{ Wv'B[;[) URL url = new URL(sURL); Z"8cGN' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #2t\>7] httpConnection.setRequestProperty("User-Agent","NetFox"); :QY 9p T String sProperty = "bytes="+nStartPos+"-";
nLLHggNAV httpConnection.setRequestProperty("RANGE",sProperty); u6&Ixi/s' Utility.log(sProperty); +( 7vmC. [~H`9Ab= HDG"a&$
InputStream input = httpConnection.getInputStream(); Jx[e{o)o //logResponseHead(httpConnection); |vE#unA n7<-lQRaxZ F,$$N> byte[] b = new byte[1024]; \A"a>e int nRead; 24k}~"We while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) T{2//$T? { ep1Ajz.l nStartPos += fileAccessI.write(b,0,nRead); S^_yiV
S //if(nThreadID == 1) 3JO:n6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]o[HH_`s@ } E )SOcM) H zK=UcD dKG<" Utility.log("Thread " + nThreadID + " is over!"); F#9KMu<<cI bDownOver = true; 3Jit2W4 //nPos = fileAccessI.write (b,0,nRead); vYun^(_- } -2XIF}.Hu catch(Exception e){e.printStackTrace ();} qoq<dCt3 } PltPIu)F } 667tL( $9b6,Y_- NWcF9z%@ //打印回应的头信息 l )eaIOyk public void logResponseHead(HttpURLConnection con) 3Q6#m3AWY { unB "dE for(int i=1;;i++) ^E8Hv { F.w#AV String header=con.getHeaderFieldKey(i); @uWD>(D if(header!=null) `OK
}q //responseHeaders.put(header,httpConnection.getHeaderField(header)); p`ZGV97 Utility.log(header+" : "+con.getHeaderField(header)); A~t7I{` else \%*y+I0> break; /qY(uPJ } ~~
w4854 } t38T0Ao Z ISd0hV ]5L3[A4Vu public void splitterStop() ;#Nci%<J\ { ~nlY8B( bStop = true; &wvv5Vd } AY]nc#zz "R]K!GUU `hhG^O_ } YLr2j 7 #.aLx$"a 3Pq)RD|hn /* r-uIFhV^ **FileAccess.java g==^ioS}* *//文件访问(定位,写) ZaV@}=Rd8 package NetFox; w|e i*L import java.io.*; [!$>:_Vq/ c}cboe2 h Nwb.[ public class FileAccessI implements Serializable{ Ved:w^
, F!<x;h( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 %;gWl1&5 RandomAccessFile oSavedFile; :zoX
Xo long nPos; -"H9 W: wm4e:& .YlM'E*X public FileAccessI() throws IOException K ajyQ"j { S]a$w5ZP this("",0); &!Vp'l\9 } YWdvL3Bgk, _X/`4 G z@j&vW public FileAccessI(String sName,long nPos) throws IOException :4TcCWG { N"{o3QmA oSavedFile = new RandomAccessFile(sName,"rw"); V-|}.kOH2 this.nPos = nPos; '`"&RuB oSavedFile.seek(nPos); F'!}$oT" } 03y<'n .?TVBbc%5 VP&lWPA}\$ public synchronized int write(byte[] b,int nStart,int nLen) ShP V!$0 { `.XU|J*z, int n = -1; Ab)7hCUW try{ h:wD
&Fh8 oSavedFile.write(b,nStart,nLen); [%y D,8 n = nLen; )*B.y|b# } r+crE %- catch(IOException e) #wfR$Cd { C09@2M' e.printStackTrace (); 5=\b+<pE } R!ij CF\ |V5H(2/nk aDESO5 return n; O!jCQ{ T } :n4x}% @nK08Kj- xOH@V4z: } ^EZoP:x(oE ;8UHPDnst jw)t"S/E /* >?tpGEZ\ **SiteInfoBean.java inPGWG K] */ D]REZuHOI package NetFox; Mtlj I6 o/#e
y j~0hAKHG public class SiteInfoBean { z#b6 aP .'M]cN~ a>6p])Wh private String sSiteURL; //Site's URL \uH;ng|m private String sFilePath; //Saved File's Path Rh|&{Tf private String sFileName; //Saved File's Name e"Z~%,^A private int nSplitter; //Count of Splited Downloading File T^ -RP `B~%TEvMh e BPMT public SiteInfoBean() "A7tb39* {//nSplitter的缺省值为5 A'T! og|5 //default value of nSplitter is 5 <\u%ZB this("","","",5); P_}$|zj7 } ]v#Q\Q8> 8in8_/x LdL< 5Q[ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {.AFg/Z { i*3'O:Gq sSiteURL= sURL; xYbF76B sFilePath = sPath; G|V ^C_: sFileName = sName; wp$=lU{B this.nSplitter = nSpiltter; =6'A8d LS;kq', +-ue={' } TAP/gN' Rh39x-`Z aX!J0&3 public String getSSiteURL() Ty>`r n { Wjp<(aY[ return sSiteURL; {az8*MR=X } ~dv
C$ x~
I cSt ?AR6+`0 public void setSSiteURL(String value) 1'h?qv^( { `eA 0Z:`g! sSiteURL = value; ) E5ax~ } Xa36O5$4]9 j&F&wRD%r umc!KOkL public String getSFilePath() Bi]%bl>% { iC
2:P~ return sFilePath; g\2Y605DM } GerZA# LGK}oL' F$.M2*9 public void setSFilePath(String value) I3$v-OiL { 7l?-2I'c sFilePath = value; `*!.B } nRvV+F0# +:D0tYk2B 3N?uY2 public String getSFileName() #+XKfumLk { f"/NY6 return sFileName; w$1.h'2 } 8YCtU9D 7:]I@Gc' U]_1yX public void setSFileName(String value) 'kp:yI7w { |>m@]s7Z sFileName = value; ?=6zgb"9- } ezFyd 'P :[Fwc )V3G~p=0 public int getNSplitter() kIQMIL0+ { Xf:-K(%e return nSplitter; q0Fy$e]u } WKP=[o^ iidK}<o =*t)@bn public void setNSplitter(int nCount) gq/q]Fm\ { =5+:<e,& nSplitter = nCount; M}HGFN } xHHG|
u } U4%P0}q/ ?'^xO: 7&2xUcsz) /* Dzb@H$BQ7 **Utility.java S);bcowf_ */ >QCVsX>~ package NetFox; ^,,|ED\M{m &6h,' U }6`#u:OZ public class Utility { IU&n!5d$)| lBl`R|Gt eR?`o !@y public Utility() +hi!=^b] { hCM+=]z" J-b
Z`)[Q %G>*Pez% } $33wK wTqgH@rGtR //线程睡眠 x]w%?BlS public static void sleep(int nSecond) G$WMW@fy { ?z p$Wz;k try{ zoA]7pG- Thread.sleep(nSecond); 1Z|q0-Dw0 } h
~v8Q_6 catch(Exception e) DdPU\ ZWR { Lk4gjs,V e.printStackTrace (); ~#Vrf0w/ } ;=aj)lemCr } _A1r6 1#6c
sZW5 //日志 bvi
Y.G3 public static void log(String sMsg) A(ql}cr { @} qMI
System.err.println(sMsg); rMUn ~ } wm_xH_{F Dhv ^}m@ s@V4ny9x public static void log(int sMsg) ~Cm_=[ { `|+!H.3 System.err.println(sMsg); uL`_Sdjw } k,OP*M } V& _ &i$p5 =[`B -? /* s
+"?j **TestMethod.java OjFB_
N */ ch!/k package NetFox; "`s{fy~mV e+Vn@-L; /{|JQ'gqX public class TestMethod { ZuH@qq\ 6C7|e00v <>%2HRn<u public TestMethod() R0HzNk { ///xx/weblogic60b2_win.exe )T&ZiHIJ3 try{ gd#+N]C_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f@rR2xZoQ
//SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }Ox5,S}ra SiteFileFetch fileFetch = new SiteFileFetch(bean); k>SPtiAs fileFetch.start(); N"L@ } 9bwG3jn4? catch(Exception e){e.printStackTrace ();} a'r8J~:jy #?u#=] P-U9FKrt } Xw)W6H| C;>!SRCp N3"O#C public static void main(String[] args) Vq4g#PcG { 3qggdi new TestMethod(); %m )vQ\Vtx } '(fQtQ% } #\1)Tu%- 点击下载更多相关资料
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