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/* x }\64 **SiteFileFetch.java Sp@^XmX(S */ ,&jhlZ i package NetFox; a`&f import java.io.*; { /K.3 import java.net.*; 0E,8R{e 0fF(Z0R, Pz>s6 [ob public class SiteFileFetch extends Thread { !c}O5TI|# hd>aZ"nm1 _/uFsYC SiteInfoBean siteInfoBean = null; //文件信息Bean 5R'TcWf#W long[] nStartPos; //开始位置 uw[<5 long[] nEndPos; //结束位置 ])|d"[ur= FileSplitterFetch[] fileSplitterFetch; //子线程对象 4
Y;Nm1@ long nFileLength; //文件长度 Mn9dqq~a boolean bFirst = true; //是否第一次取文件 "uuVy$6C boolean bStop = false; //停止标志 2^mJ+v< File tmpFile; //文件下载的临时信息 9o;^[Ql- DataOutputStream output; //输出到文件的输出流 _,xc[ 07 QrB@cK] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) KM}f:_J*lg public SiteFileFetch(SiteInfoBean bean) throws IOException qfL~Wp2E; { Y
;u<GOe siteInfoBean = bean; 4wID]bKM //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5mJ JU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $FlW1E j if(tmpFile.exists ()) 'oF%,4 !Y { As 3.Q(#Z bFirst = false; l)Pu2!Ic read_nPos(); oFy=-p+C } 9:ze{ c $ else LQtj~c>X-| { |zQ4u nStartPos = new long[bean.getNSplitter()]; P;P%n nEndPos = new long[bean.getNSplitter()]; g .onTFwN } lJu;O/ J?Ra bYd ~ KNS.Nw7 jX3,c%aQ5e } *of3:w JRSSn] pw 19O,a#{KHf public void run() $^OvhnL/ { RA KFU //获得文件长度 d]:I(9K //分割文件 w8kOVN2b //实例FileSplitterFetch -R57@D>j\ //启动FileSplitterFetch线程 Fy`(BF\ //等待子线程返回 iz8Bf; try{ ~i~7na| if(bFirst) E=e*VEjy { v}1QH nFileLength = getFileSize(); ]8Q4BW if(nFileLength == -1) k 8UO9r[ { 1u:
gFUb System.err.println("File Length is not known!"); 6^]!gR#B } E"+QJ~! else if(nFileLength == -2) Svondc
4 { RRRCS]y7$t System.err.println("File is not access!"); 4*Q#0`um } ^.1c{0Y^0 else 7on.4/;M { ?Cl%{2omO for(int i=0;i<nStartPos.length;i++) AtdlZ { 2] zq#6ix nStartPos = (long)(i*(nFileLength/nStartPos.length)); A D1=[I3 } 9[G[$c for(int i=0;i<nEndPos.length-1;i++) [x9KVd ^d { 1+9W+$=h2 nEndPos = nStartPos[i+1]; POvP]G9'" } ~~v3p>z Rr nEndPos[nEndPos.length-1] = nFileLength; n^z]q;IN2. } {B[=?6tQ } 7(qE0R&@ l-SAC3qhG &;+-?k| //启动子线程 KVD8YfF fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; [-\%4 for(int i=0;i<nStartPos.length;i++) ^:#D0[ { D@Vt^_ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >sK!F$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), f>W- nStartPos,nEndPos,i); U-IpH+E Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .v$D13L(o fileSplitterFetch.start(); N'g>MBdI } c2&q*]?l; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <)u`~$n2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5qr'.m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", b]x4o#t nEndPos = " + nFileLength); W0l,cOOZJ // fileSplitterFetch[nPos.length-1].start(); WN01h=1J_ %KmiH
;U u/M+u; //等待子线程结束 w,h`s.AN //int count = 0; JKGc3j,+# //是否结束while循环 Vm3v-=6 boolean breakWhile = false; rd9e \%A $4/yZaVb MhR:c7, while(!bStop) Qk,I^1w?7 { "J4WzA%i write_nPos(); Vl:^>jTki Utility.sleep(500); hnDBFQ{ breakWhile = true; [/Rf\T(,jn cUA7#1\T= 89o/F+ _b for(int i=0;i<nStartPos.length;i++) Z@3i$8 { ynE)Xdh if(!fileSplitterFetch.bDownOver) cUY`97bn { <Dwar>} breakWhile = false; ;\=M;Zt break; a>GyO&+Dkg } 4|CtRF<L } %`r?c<P} if(breakWhile) >U%gctIg break; 9 D7+[`r(- i'#E) hJZV}a| //count++; y *fDwd~ //if(count>4) f}x.jxY? // siteStop(); H^s<{E0< } Bs O+NP wM2*# FLGk?.x$\ System.err.println("文件下载结束!"); fpFhn } R)mu2^ catch(Exception e){e.printStackTrace ();} hRK/T7v } 1+}{8D_F <})2#sZO!
w-Da~[J //获得文件长度 vTJ}8 public long getFileSize() ~])t 6i { @Ub"5Fl4 int nFileLength = -1; J/[=p<I) try{ g7OqX \ URL url = new URL(siteInfoBean.getSSiteURL()); gK[YQXfTy HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @te!Jgu{ httpConnection.setRequestProperty("User-Agent","NetFox"); >_|O1H./4 EUN81F? Ry%Mej: int responseCode=httpConnection.getResponseCode(); .6`9H 1 if(responseCode>=400) &(xH$htv1 { (X?%^^e! processErrorCode(responseCode); 4}4Pyjh return -2; //-2 represent access is error 0@H|n^Md# } &NH$nY.r NiU2@zgl ]%?YZn<{ String sHeader; G>1eFBh } 1T-8K
r M#As0~y for(int i=1;;i++) wPwXM! { *=+td)S/1 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *# tJM.Z //Utility.log(in.readLine()); <8d^^0 sHeader=httpConnection.getHeaderFieldKey(i); <N_+=_ if(sHeader!=null) PYM(Xz$ { il:$sd if(sHeader.equals("Content-Length")) a hR ^ { A-T]9f9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2JJ"O|Ibz break; L1Iz<> } }>VG~u8 } ,PWgH$+ else }Ub6eXf(2 break; XgLL!5` } gG-BVl"59 } 1@QZnF5[ catch(IOException e){e.printStackTrace ();} /+\uqF8F catch(Exception e){e.printStackTrace ();} dt`{!lts' :k.NbN$i\ bpKZ3}U Utility.log(nFileLength); L"{JRbh[ ;)!Sp:mHX ]8f ms( return nFileLength; +(C6#R<LI } U2ZD]q a^=-Mp ,)iKH]lY= //保存下载信息(文件指针位置) :j]vf8ec private void write_nPos() )tl.s)"N { +TQ47Zc try{ hA33K #bC output = new DataOutputStream(new FileOutputStream(tmpFile)); *g[^.Sg output.writeInt(nStartPos.length); /Rg*~Ers
* for(int i=0;i<nStartPos.length;i++) >]W)'lnO { > 3&: 5 // output.writeLong(nPos); 8AnP7}n;?' output.writeLong(fileSplitterFetch.nStartPos); m"o ;L3 output.writeLong(fileSplitterFetch.nEndPos); q~*t@ } |m80]@> output.close(); XI9js{p } ,B0_MDA + catch(IOException e){e.printStackTrace ();} ^Nmg07_R catch(Exception e){e.printStackTrace ();} A` AaTP } Up,vD)tG D,g1<:< nSkPM5\TI //读取保存的下载信息(文件指针位置) %YSu8G_t private void read_nPos() C@bm { o]p|-<I Q try{ |Tm!VFd DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <oo int nCount = input.readInt(); '*?WU_L(g nStartPos = new long[nCount]; -*m+(7G\ nEndPos = new long[nCount]; }b0; 0j for(int i=0;i<nStartPos.length;i++) <_XWWT% { 9\]^|?zQ` nStartPos = input.readLong(); %"af748!+D nEndPos = input.readLong(); IjR'Qou5 } RW }"2 input.close(); e}.^Tiwd] } k31I ysh catch(IOException e){e.printStackTrace ();} ^8@Iyh catch(Exception e){e.printStackTrace ();} j'BMAn ? } ##EYH1P] rORZerM d\ ~QBr? private void processErrorCode(int nErrorCode) dVFf. { =<NljOR4` System.err.println("Error Code : " + nErrorCode); *H.oP } RhvfC5Hq "B8"_D& JGH60| //停止文件下载 DNj"SF(J public void siteStop() 2w-51tqm { Hx\H $Y bStop = true; Pw;!uag for(int i=0;i<nStartPos.length;i++) TM|)Ljm fileSplitterFetch.splitterStop(); jMN[J|us51 ,i,q!M{- v0ES; } [w&$| h:; } +C(/Lyo} //负责部分文件的抓取 EB_NK **FileSplitterFetch.java ea00\ */ zA!0l*H package NetFox; w&B#goS ]<q[Do8k qg}O/K import java.io.*; *L'>U[Pl7 import java.net.*; jD`d#R NU*fg`w
u*#ZXW public class FileSplitterFetch extends Thread { Hw-Z !k/Pv\j/R Kbb78S30 String sURL; //File URL P b]3&!a long nStartPos; //File Snippet Start Position e4z1`YLsG long nEndPos; //File Snippet End Position +5&wOgx int nThreadID; //Thread's ID k!KDWb
boolean bDownOver = false; //Downing is over -~QHqU. boolean bStop = false; //Stop identical Gsc\/4Wx FileAccessI fileAccessI = null; //File Access interface Z+StB15 3:f[gV9K Xj5~%DZp public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException XFh>U7z. { yGsz2T;w this.sURL = sURL; B-T/V-c7 this.nStartPos = nStart; _"#!e{N| this.nEndPos = nEnd; V2<?ol nThreadID = id; \#>T~.Y7K fileAccessI = new FileAccessI(sName,nStartPos);//定位 /g$G_} }
W":PG68 `St.+6^J C{q :_M; public void run() A,)VM9M_l { >N?2"" while(nStartPos < nEndPos && !bStop) b77>$[xB { !Y:0c#MPH w1|A5q'M f*24)Wn< try{ xGG,2W+z URL url = new URL(sURL); _` [h,= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }h}<!s httpConnection.setRequestProperty("User-Agent","NetFox"); &V<W>Y>|l* String sProperty = "bytes="+nStartPos+"-"; 7oR:1DXw| httpConnection.setRequestProperty("RANGE",sProperty); )
9oH,gZ Utility.log(sProperty); ,.o<no U7DCx=B DtEwW1J InputStream input = httpConnection.getInputStream(); $L2%u8}8: //logResponseHead(httpConnection); wV)}a5+ \xUe/= !!:LJ byte[] b = new byte[1024]; d.2mT?`# int nRead; v i)%$~ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) PccB] { wCHR7X0*b nStartPos += fileAccessI.write(b,0,nRead); _HA$
j2
//if(nThreadID == 1) Jy
aag- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Jz! Z2c } -.|4Y#b:& lMz<s C P3<1~ Utility.log("Thread " + nThreadID + " is over!"); ~kCwJ<E bDownOver = true; 1H,g=Y4f% //nPos = fileAccessI.write (b,0,nRead); _NcYI } )*5G">) )p catch(Exception e){e.printStackTrace ();} jkF8\dR } :EtMH( } '>v^6iS )!Bd6- D5an\gE //打印回应的头信息 X{g%kf,D= public void logResponseHead(HttpURLConnection con) gLSA!#[h { $y?k[Y-~ for(int i=1;;i++) =]>NDWqpHN { =9LC<2 String header=con.getHeaderFieldKey(i); f):~8_0b if(header!=null) R4<lln:[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); z1!6%W_. Utility.log(header+" : "+con.getHeaderField(header)); oy<J6 else 2 /y}a#s break; oR*=|B } K$
v"Uk } vLO&Lpv rz(0:vxwA ?v-1zCls public void splitterStop() K+T.o6+ { i%#$* bStop = true; =_[Z W } ntP|\E 1|?K\B w^1Fi8+ } R1-k3;v^ J@9}`y=K ~^vC,]hU /* -K[782Q **FileAccess.java p[2GkP *//文件访问(定位,写) jvVi%k package NetFox; b8f+,2Tk import java.io.*; htPqT,L MbXq`% lr2rQo> public class FileAccessI implements Serializable{ c
{I"R8 +3,|"g:: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Fpt-V RandomAccessFile oSavedFile; &&L"&Rc long nPos; ,eQ[Fi!! :ZxLJK9x1 'xFYUU]#T^ public FileAccessI() throws IOException -s$<Op{s { }xlKonk this("",0); +@VYs*&& } y5m!*=`l` H0*5_OJ!i x"(9II* public FileAccessI(String sName,long nPos) throws IOException Ih1|LR/c { 0W>9'Rw oSavedFile = new RandomAccessFile(sName,"rw"); MjaUdfx this.nPos = nPos; D*vm
cSf oSavedFile.seek(nPos); ^^(<c,NX#M } ;5<-) tLcEl'Eo !5x
Ly6=} public synchronized int write(byte[] b,int nStart,int nLen) S)%_we LW7 { ad!(z[F'Y int n = -1; ,M3z!=oIGn try{ |xr32gs oSavedFile.write(b,nStart,nLen); uv4 _: n = nLen; Wn!G.(Jq } 3z{S}~ catch(IOException e) 4x'AC%&Qi { M+sj} e.printStackTrace (); bO49GEUT _ } 0zqj0
&WZP2Q| MY-.t-3 return n; a%hGZCI } @XOi62( G+)?^QTn YDiN^q7 } -O&"| z^sST ,m07p~,V /* !v!N>f4S$ **SiteInfoBean.java iUr xJh */ dDKqq(9(` package NetFox; L)-*,$#<oW n_$yV:MuT! Nm8w/Q5D` public class SiteInfoBean { b?kPN:U#N/ L(WOet( ' _g6m=N4 private String sSiteURL; //Site's URL Sb^
b)q" private String sFilePath; //Saved File's Path ma}}Sn)Q private String sFileName; //Saved File's Name 6b:DJ private int nSplitter; //Count of Splited Downloading File ~HP
LV eX<K5K.B $
u2Cd4 public SiteInfoBean() _1JmjIH)M {//nSplitter的缺省值为5 PI7IBI //default value of nSplitter is 5 6tOi^+qN this("","","",5); sT<{SmBF } E_[ONm=, R @r{ g'G8 3F public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 3kLOoL? { XUsy.l/ sSiteURL= sURL; oofFrAaT sFilePath = sPath; J>v$2?w`w sFileName = sName; .]Ybp2`"U this.nSplitter = nSpiltter; v#=ayWgk n0.8)=;2 rrQ0qg }
X^in};&d e?)yb^7K
nhfwOS public String getSSiteURL() F7uhuqA]N { +)-d_K.(k return sSiteURL; -Uf4v6A } Tcs3>lJ} v_-ls"l ?1m ,SK public void setSSiteURL(String value) 3#9M2O\T { H!JWc'(<$ sSiteURL = value; EHWv3sR- } nx :)k-p_[ I2*oTUSik |p'i,.(c_W public String getSFilePath() K%<GU1]-] { d2ofxfpg+ return sFilePath; luF#OP C } OQ|,- a-Fqp4 --/-D5 public void setSFilePath(String value) >H?uuzi { Ao!=um5D J sFilePath = value; -eYL*Pa } |Y4q+sDW dKe@JQ+-z x=3I)}J(kn public String getSFileName() Ij$)RSPtH { ]xB6cPdLu return sFileName; {Vl"m2 } SbJh(V-pr ]1Qi=2' ;5RIwD public void setSFileName(String value) i -V0Lm/ { tD^a5qPh sFileName = value; 2e\Kw+(>{ } coO.kTO; ULbP_y>(Y #x|VfN5f public int getNSplitter() >;.* { MZiF];OY return nSplitter; |bvGYsn_#= } L3>4t: 8 (o{)>D F$C+R&V_ public void setNSplitter(int nCount) /~"AG l. { '7=<#Blc nSplitter = nCount; U:Fpj~E_w } c8tP+O9 } p(7c33SyF (T2<!&0 @ dff#{ /* :9O|l)N)W= **Utility.java `0[fLEm */ SJF 2k[da package NetFox; ~:s!].H ~s0P FS7 v5gQ9 public class Utility { ep`/:iY W @s?oJpo {!tOI public Utility() zlN+edgY#, { T)O]:v 9Iy[E,j X~#@rg!" }
`;T?9n td`wNy\ //线程睡眠 cG5$lB public static void sleep(int nSecond) ]:Wb1 { cxk=|
?l try{ "vvFq ,c Thread.sleep(nSecond); s~#?9vW } >d)|r catch(Exception e) _qk9o { rcpvH}N: e.printStackTrace (); /.f! } ?~]>H A: } }"g@E-]N dfXV1B5 //日志 2voNgY public static void log(String sMsg) Z^C!RSQ { cRPr9LfD@ System.err.println(sMsg); u'{sB5_H } *Y^5M"AB_ M!{Rq1M mrX}\p public static void log(int sMsg) [29$~.m$Y { !/[AQ{**T! System.err.println(sMsg); .Pqj6Ko9 } Iy-u`S } #NSaY+V mfUKHX5 %Ud.SJ3 /* jWz|K **TestMethod.java Ab/v_mA; */ C} |O#"t^\ package NetFox; I(F1S,7 ]q@rGD85K 7?)m(CFy public class TestMethod { H74NU_ N7%=K9 d8 3+6d public TestMethod() _dz:\v { ///xx/weblogic60b2_win.exe ok8JnQC try{ (}~ 1{C@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ZD
iW72&Q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %pQdq[J={ SiteFileFetch fileFetch = new SiteFileFetch(bean); +*]SP@|IYI fileFetch.start(); R?i-"JhW } us(sZG catch(Exception e){e.printStackTrace ();} "Vs
Nyy wpJ^}+kF 9L UP{(uq } +G>aj'\M| '&&~IB4ud $H
%+k? public static void main(String[] args) Au%Wrk3j { m mw)C" new TestMethod(); t(Cq(.u`: } \v B9fA:* } 1WZKQeOo 点击下载更多相关资料
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