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/* q$L%36u~/ **SiteFileFetch.java #&+{mCjs */ T}Tp$.gB package NetFox; 3=#<X-); import java.io.*; E#RDqL*J import java.net.*; xH4m| ]2A^1Del ;7*[Bcj. public class SiteFileFetch extends Thread { >fG3K` 6{K,c@VFd _`$qBw.Nx SiteInfoBean siteInfoBean = null; //文件信息Bean U)TUOwF long[] nStartPos; //开始位置 299H$$WS,Z long[] nEndPos; //结束位置 !vi>U|rh FileSplitterFetch[] fileSplitterFetch; //子线程对象 q_lKKzA long nFileLength; //文件长度
Q>qUk@ boolean bFirst = true; //是否第一次取文件 t|?ez4/{z boolean bStop = false; //停止标志 evJ4C#Pr File tmpFile; //文件下载的临时信息 k?yoQL* DataOutputStream output; //输出到文件的输出流 r wL`Czs 1dY}\Sp //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) K`eCDvlH public SiteFileFetch(SiteInfoBean bean) throws IOException %fZJRu
1b { sfH_5
#w siteInfoBean = bean; Sz
$~P9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); n6=By|jRh tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Wb,KjtX if(tmpFile.exists ()) $QF{iV@6d4 { f^ZRT@`O bFirst = false; >~rTqtKd read_nPos(); O^PKn_OJ } ?5__oT else t^-d/yKt0w { R+:yVi[F]U nStartPos = new long[bean.getNSplitter()]; _%Bi: HG0 nEndPos = new long[bean.getNSplitter()]; =[ 46`-_ } z|uDy2 .#!lP/.eQP Y|m+dT6 j3oV+zZ49 } \&:nFb%= hW')Sp h8j.( public void run() B4/>H| { ? V1*cVD6i //获得文件长度 yu {d! {6 //分割文件 t,Lrfv]) //实例FileSplitterFetch udH7}K v //启动FileSplitterFetch线程 ]]![EHi(\ //等待子线程返回 234p9A@ try{ LrfVh-}|:Y if(bFirst) 1nM
#kJ" { E =67e=h nFileLength = getFileSize(); R- wp9 ^ if(nFileLength == -1) &AMl:@p9 { urc|
D0n System.err.println("File Length is not known!"); +QavYqPF } ^0)g/`H^> else if(nFileLength == -2) G't$Qx,IC { EP&,MYI%E System.err.println("File is not access!"); FkDmP`Od } %Xd[(Q) else 5ta `%R_ { 7"D",1h for(int i=0;i<nStartPos.length;i++) BVQqY$> { m 0C@G5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); u#fM_>ML } /62!cp/F/D for(int i=0;i<nEndPos.length-1;i++) P5V}#;v { 6wRd<]C nEndPos = nStartPos[i+1]; K3&qq[8.e } s[*rzoA nEndPos[nEndPos.length-1] = nFileLength; #zy:a% } ODN/G%l } Wb_J(!da ~_)^X qwcD`HV, //启动子线程 \K{
z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]c*4J\s for(int i=0;i<nStartPos.length;i++) qZh/IW { GA)`-*.R fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C=xa5Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ,ng Cv;s nStartPos,nEndPos,i); <=&`ZH Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R^fPIv`q fileSplitterFetch.start(); uMv,zO5 } bWS&Yk( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), FxY}m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); lFj]4 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~P
qM]^ nEndPos = " + nFileLength); E=Bf1/c\ // fileSplitterFetch[nPos.length-1].start(); {uFO/ Qljpx?E V &T~zh1 //等待子线程结束 MJ)RvNF //int count = 0; D)P ._? //是否结束while循环 3M`M boolean breakWhile = false; v/plpNVp> `RW HN/U ;;t yoh~t while(!bStop) I@N8gn { (lqC[: write_nPos(); ]N]!o#q}L Utility.sleep(500); gVuFHHeUz breakWhile = true; n8[!pH~6 %2{ye
Q{>k1$fkV for(int i=0;i<nStartPos.length;i++)
K5 z<3+ { R29~~IOqO if(!fileSplitterFetch.bDownOver) C): 1?@ { Nx;~@ breakWhile = false; ~8+ Zs break; @
q3k%$4 } +`0k Fbx } JR|ck=tq if(breakWhile) 1&OW4_ break; q
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Kc RB\uK
1+ :OZrH<SW //count++; _f,C[C[e& //if(count>4) ({_{\9O,3 // siteStop(); c6]U E@A } s8Q 5ui] 0mVNQxHI qR{=pR System.err.println("文件下载结束!"); hfTY. } ?^{Ah}x catch(Exception e){e.printStackTrace ();} H?Wya.7 } IOH}x4 kD%( _K5 B6 ;|f'e! //获得文件长度 } OR+Io public long getFileSize() j (d~aqW { Ml5w01O int nFileLength = -1; \)[j_^ try{ & .j&0WE URL url = new URL(siteInfoBean.getSSiteURL()); ^ytrK
Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JbbzV> httpConnection.setRequestProperty("User-Agent","NetFox"); ,0 sm qDIZJh U)gH}0n& int responseCode=httpConnection.getResponseCode(); e*C(q~PQ if(responseCode>=400) _VN?#J)o { B 3I`40# processErrorCode(responseCode); HC8e>kP9b return -2; //-2 represent access is error '<<t]kK[N } L*+@>3mu) t{kG<J/l Llo"MO*sr String sHeader; G` A4|+W" +'a^f5 m0SlOgRsk for(int i=1;;i++) tk`v:t!6U { _{KG
4+5\X //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ND;#7/$> //Utility.log(in.readLine()); cI*;k.KU sHeader=httpConnection.getHeaderFieldKey(i); p2](_}PK if(sHeader!=null) Fxz"DZY6 { fr3d if(sHeader.equals("Content-Length")) q9_OGd|P { 7$=InK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); AkV#J,
3LC break; vE?G7%, } x;d6vBTUb } a=2%4Wmz else 4[eXe$ break; `;C V=,M } 5;EvNu } L4HI0Mx catch(IOException e){e.printStackTrace ();} /4Gt{ygSr catch(Exception e){e.printStackTrace ();} jLluj lo+A%\1 :F?C)F Utility.log(nFileLength); %h@EP[\ vs4>T^8e '=pU^Oz<} return nFileLength; y)@wjH{6 } K0>zxqY yN-9[P8C 0(HU}I //保存下载信息(文件指针位置) f:}
x7_Q private void write_nPos() S9.o/mr { ?@86P|19 try{ ;Y, y 4{H3 output = new DataOutputStream(new FileOutputStream(tmpFile)); ~DwpoeYX output.writeInt(nStartPos.length); XL^GZ for(int i=0;i<nStartPos.length;i++) <5051UEu { 2+XAX:YD // output.writeLong(nPos); ;V!D:5U output.writeLong(fileSplitterFetch.nStartPos); @VEb{ w[H output.writeLong(fileSplitterFetch.nEndPos); }K(TjZR } 9*M,R,y output.close(); @yYkti;4- } z b3tIRH catch(IOException e){e.printStackTrace ();} =s6 opL) catch(Exception e){e.printStackTrace ();} N!}f}oF } %N._w!N<5n ]-#DB^EQ uY To9A //读取保存的下载信息(文件指针位置) W>r+h-kR private void read_nPos()
J&_n9$ { RA 6w}:sq7 try{ 9(Xn>G'iT DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SXh-A1t int nCount = input.readInt(); wCBplaojJ nStartPos = new long[nCount]; :ws<-Qy nEndPos = new long[nCount]; (bS&D/N. for(int i=0;i<nStartPos.length;i++) m&3xJuKih { ~}
~4 nStartPos = input.readLong(); Vurqt_nb nEndPos = input.readLong(); %cn<ych
G } dZuOrTplA input.close(); tH4B:Bgj! } #'`{Qv0,
catch(IOException e){e.printStackTrace ();} c:('W16 catch(Exception e){e.printStackTrace ();} n$R)>nY } 2=}FBA,2 [-w%/D%@ y~V(aih}D private void processErrorCode(int nErrorCode) .xkM.g4{~ { %BODkc Zh System.err.println("Error Code : " + nErrorCode); UiNP3TJ'L } V;=cwy)I ;tf=gdX; DY*N|OnqJ //停止文件下载 EU#^7 public void siteStop() |7~<Is~* { >$7B
wO bStop = true; 6S#Cl>v for(int i=0;i<nStartPos.length;i++) Z\sDUJ fileSplitterFetch.splitterStop(); "dlVk~ >\8+:oS^ K
8O|?x] } Z_NCD`i; } =_^X3z0 //负责部分文件的抓取 a+QpM*n7Lq **FileSplitterFetch.java *^`Vz?g< */ pj(,Zd[47 package NetFox; LP=)~K< n6v6K1 x)&\z} import java.io.*; -?a 26o%e import java.net.*; ]M3yLYK/P zuCSj~ U0+-W07> public class FileSplitterFetch extends Thread { MQ2_`pi mE[y SrV V]^$S"Tv String sURL; //File URL X8\GzNE~R long nStartPos; //File Snippet Start Position HaYo!.(Fv long nEndPos; //File Snippet End Position /L3: int nThreadID; //Thread's ID B5QFK boolean bDownOver = false; //Downing is over d;>QhoiL boolean bStop = false; //Stop identical mkpMfPt FileAccessI fileAccessI = null; //File Access interface unxqkU/<Z ]$hBMuUa $cgcX public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Hr C+Yjp { tJmTBsn this.sURL = sURL; 2 E=L8< this.nStartPos = nStart; ;VK.2^jW! this.nEndPos = nEnd; ~J]qP #C nThreadID = id; rl.}%Ny fileAccessI = new FileAccessI(sName,nStartPos);//定位 XPPdwTOr } '%;m?t%q ^J{:x d-%hjy3N public void run() Sjj6q` { @)}L~lb[) while(nStartPos < nEndPos && !bStop) Y-9I3?ar { c@Is2
9t* l-3~K-k<@ 18Emi<&A try{ Ort(AfW URL url = new URL(sURL); p<%d2@lp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _0I@xQj- httpConnection.setRequestProperty("User-Agent","NetFox"); \U0'P;em String sProperty = "bytes="+nStartPos+"-"; @VI@fN httpConnection.setRequestProperty("RANGE",sProperty); "M0z(NkH Utility.log(sProperty); qgB_=Q#E QV8g#&z -g<oS9 InputStream input = httpConnection.getInputStream(); n+p }\msH //logResponseHead(httpConnection); u&e~1?R YkADk9fE A}w/OA97RO byte[] b = new byte[1024]; ?A0)L27UE& int nRead; sos5Y} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) z9"U!A4 {
.Y|!:t| nStartPos += fileAccessI.write(b,0,nRead); $Kd>:f=A //if(nThreadID == 1) 7$#u // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AFn7uW!9Gw } HKe K<V BLFdHB.$T =|9!vzG4 Utility.log("Thread " + nThreadID + " is over!"); ^^Vg~){4 bDownOver = true; d_CT$ //nPos = fileAccessI.write (b,0,nRead); MOC/KNb } eH,or ,r catch(Exception e){e.printStackTrace ();} A(X KyEx } j1Ezf=N6` } 4z)]@:`}z {[F A# )gi9f1n` //打印回应的头信息 d5 -qZ{W public void logResponseHead(HttpURLConnection con) <naz+QK' { [B3RfCV{ for(int i=1;;i++) SWLo|)@[/ { /@5YW"1 String header=con.getHeaderFieldKey(i); 13f)&#, F if(header!=null) )}vl\7= //responseHeaders.put(header,httpConnection.getHeaderField(header)); P
{'b:C Utility.log(header+" : "+con.getHeaderField(header)); `_h&glMJ,q else R#KU^]"( break; ULW~90 } :KO2| v\ } Va8&Z b Zt3| !9x} public void splitterStop() R-Sym8c { -qoH,4w bStop = true;
8Y?;x} } rlD8D|ZG V8(- pot~<d`:K" } ce(#2o&` Ca\6vR N21smC} /* ;}t(Wnu. **FileAccess.java %)n=x
ne *//文件访问(定位,写) Ho%CDz
z package NetFox; +[P{&\d4} import java.io.*; "#48% -'x 11lsf/IP W!<U85-#S public class FileAccessI implements Serializable{ j.YA2mr +|rj4j)L&' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _*zt=zn> RandomAccessFile oSavedFile; 7o4\oRGV long nPos; 3a|\dav% oU/5 a>9~ ;Xw~D_uv public FileAccessI() throws IOException ;Qq\DFe.w { ~5g ~;f[4 this("",0); `{Ul! } [
3HfQ ctUp=po YzWz| public FileAccessI(String sName,long nPos) throws IOException #Dac~>a' { *h|U,T7ew oSavedFile = new RandomAccessFile(sName,"rw"); A=4OWV? this.nPos = nPos; j39wA~K oSavedFile.seek(nPos); *`U~?q} } dRDnJc3 He)%S]RLk q:(%*sY> public synchronized int write(byte[] b,int nStart,int nLen) h$*!8=M { Ls%MGs9PI int n = -1; w(rE`IgW try{ _Y!IEAU/# oSavedFile.write(b,nStart,nLen); 8-i#8'/x n = nLen; n| ;Im&, } 6wxs1G catch(IOException e) $u.z*b_yy { D]}G.v1 e.printStackTrace (); +d>IHpt } .u:GjL'$ a
=QCp4^ kP"9&R`E return n; ceV}WN19l } VE24ToI?W" 5m*,8 ]!- =Uh$&m } ^s=8!=A( L$-T,Kze 9gFUaDLo /* $?Wb}DU7_L **SiteInfoBean.java PeT'^?> */ 6 r"<jh # package NetFox; ise-O1' "fI6Cpc ?EL zj public class SiteInfoBean { ,)XLq8 _LPHPj^Pg w@b)g private String sSiteURL; //Site's URL (?c-iKGc private String sFilePath; //Saved File's Path pGZ8F private String sFileName; //Saved File's Name P'2Qen* private int nSplitter; //Count of Splited Downloading File E3i4=!Y Zh,71Umz g ?k=^C public SiteInfoBean()
eIlva? {//nSplitter的缺省值为5 <N)oS-m> //default value of nSplitter is 5 >bxS3FCX this("","","",5); liZxBs
:%i } ?0SEMmp`H #?E"x/$Y6 RpK@?[4s public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) g*Phv|kI { '7/)Ot( sSiteURL= sURL; B6"0OIDY" sFilePath = sPath; _+,TT['57s sFileName = sName; gSgr6TH0 this.nSplitter = nSpiltter; Gq6*SaTk <UI
[%yXj <[phnU^
8 } aYeR{Y] JLYi]nZ %RVZD#zr public String getSSiteURL() y(&Ac[foS} { 6mE\OS-I return sSiteURL; y2v^-q3 } ZoeD:xnh[ TV:9bn?r) GeqPRah public void setSSiteURL(String value) :Al!1BJQ { ;j7#7MN2_E sSiteURL = value; dI2
V>vk } y9;Yivr) =vPj%oLp'a lk!@? public String getSFilePath() =-T]3! { T+$[eWk"a return sFilePath; H.;Q+A,8^ } \!(zrfP{( ZC?Xqp n|hNM?v public void setSFilePath(String value) GB^B r6 { 9$Y=orpWxr sFilePath = value; 83m3OD_y } ~>G^=0LT pdMc}=K @d_M@\r=j public String getSFileName() KXrjqqXs { i@q&5;%% return sFileName; k!^{eOM } K@2),(z Fcx&hj1gQ }qUX=s
GG public void setSFileName(String value) $j~RWfw- { 3'Rx=G' sFileName = value; I'Hf{Erw } gr{ DWCK z{543~Og59 ]iWRo' public int getNSplitter() {vj)76%y { "~nZ GiK return nSplitter; Zfw,7am/ } *Ly6`HZ9 5(2;|I,T F{wzB public void setNSplitter(int nCount) V+\Wb[zDJ { l}h!B_P' nSplitter = nCount; dQvcXl] } cl1T8vFM } :3PH8TL +t.b` U`- ?M2J wAK5 /* RFGffA&
**Utility.java :m;p:l|W */ 54,er$$V package NetFox; pCDmXB W)/#0*7 *a)n62 public class Utility { !Cs_F&l"j f<_Cq<q" ]GS bjHsO public Utility() A,]h),b { l{9Y Wqnc{oq|$ x;S @bY } S/ *E,))m gUlo]!$ //线程睡眠 +|v90ed public static void sleep(int nSecond) ~o( { wkq 66? try{ .}t
e>]A* Thread.sleep(nSecond); 9$t(&z= } GdwVtqbX catch(Exception e) x2EUr,7 { F
[M,]? e.printStackTrace (); }k0_5S } mw!F{pw } '91/md5 29rX%09T] //日志 _$'ashF public static void log(String sMsg) /z!%d%" { }C:r9?T System.err.println(sMsg); \zY!qpX< } O^.#d ~&T~1xsFJ 8}[).d160 public static void log(int sMsg)
XX@ZQcN { dG{A~Z z System.err.println(sMsg); Y*^[P,+J*} } 0@(&eH= } \RiP
_-D{-Bu# uZ5p#M_ /* +z( Lr=G **TestMethod.java eDMO]5}Ht */ +TJCLZ.. package NetFox; M{@(G5 zda 3
,U2o UZMd~| public class TestMethod { uT{q9=w uD'6mk* 2HdC |$_+ public TestMethod() 8Wx=p#_ { ///xx/weblogic60b2_win.exe A<{{iBEI` try{ d~H`CrQE* SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8r{.jFGv //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5);
}pYqWTG SiteFileFetch fileFetch = new SiteFileFetch(bean); >j/w@Fj fileFetch.start(); uYN`:b8 }
)2.Si# catch(Exception e){e.printStackTrace ();} nKY6[|!# xEI%D|)< 0;k# *#w } 3n _htgcv siI;"? {.yB'.k? public static void main(String[] args) {mg2pfhB! { M >u_4AY new TestMethod(); 2ESo2 } ^sw?gH* } EwN}l 点击下载更多相关资料
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