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/* X4hz\={ **SiteFileFetch.java K*Ba;"Ugeg */ 2@Nd02v| package NetFox; _)Txg2?= import java.io.*; C7m/< import java.net.*; (oy@j{G)c6 dPpQCxf 2&:z[d}~H public class SiteFileFetch extends Thread { =2GKv7q$x, D}!YF~ {e2ZW] SiteInfoBean siteInfoBean = null; //文件信息Bean 4>L*7i long[] nStartPos; //开始位置 O_2o/ long[] nEndPos; //结束位置 JiXE {( FileSplitterFetch[] fileSplitterFetch; //子线程对象 _UkBOJ:G$H long nFileLength; //文件长度 cL4Go,)w boolean bFirst = true; //是否第一次取文件 _,K[kVn boolean bStop = false; //停止标志 AG vhSd7 File tmpFile; //文件下载的临时信息 C "@>NC_ DataOutputStream output; //输出到文件的输出流 8lqmd1v KV;q}EyG //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ip'{@1L public SiteFileFetch(SiteInfoBean bean) throws IOException 4NaT@68p { /K!f3o+
siteInfoBean = bean; }I}GA:~$% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); (Lz|o!> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h0~<(3zC if(tmpFile.exists ()) kP('X/ { "-Nyf bFirst = false; FYC]^D read_nPos(); Iy*Q{H3[ } s@%>
else 8|i<4> { %K\B)HR nStartPos = new long[bean.getNSplitter()]; |p*cI @ nEndPos = new long[bean.getNSplitter()]; A9ld9R } GK11fZpO:i @zw&-b:qI ea$. + G){+.X4g3 } Snmv ESIJ QM-[+ [N[4\W!! public void run() TZ
n2,N { 6f#Mi+" //获得文件长度 Rd;t}E$ //分割文件 FR'Nzi$ //实例FileSplitterFetch t Jtp1$h //启动FileSplitterFetch线程 DTi^* Wj //等待子线程返回 J]S6%omp> try{ &dw=jHt if(bFirst) Jk|DWZ { ^a3 (QKS nFileLength = getFileSize(); 6=Q6J if(nFileLength == -1) %O[1yZh
\ { kMEXg zl System.err.println("File Length is not known!"); (<OmYnm } ~pI`_3 else if(nFileLength == -2) M,{; xf { k{Y\YG%b
System.err.println("File is not access!"); =7: }/& } r}|)oG,= else ~% ]V,-4 { 8"ZcK xDk for(int i=0;i<nStartPos.length;i++) b=W kRj { jt3W.^6HO nStartPos = (long)(i*(nFileLength/nStartPos.length)); |D'!.$7% } #t# S(A9) for(int i=0;i<nEndPos.length-1;i++) l.}gWN9- { q9^.f9- nEndPos = nStartPos[i+1]; _m#TL60m } b-c6.aKf| nEndPos[nEndPos.length-1] = nFileLength; .OW5R* } >:
@\SU } Fghan.F >E,/|K* |VM=:}s& //启动子线程 xw1,Wbu] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; K_N`My for(int i=0;i<nStartPos.length;i++) t[ b(erO' { yM-%x1r~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0r&FH$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DuQ:82 3b nStartPos,nEndPos,i); \IR$~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3] U/^f3 fileSplitterFetch.start(); $K|2k7 } jM'Fb.>~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
"JYWsE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3VQmo\li // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", dsK^-e6:5 nEndPos = " + nFileLength); Z\)P|#L$ // fileSplitterFetch[nPos.length-1].start(); D9r;Ys% oJ=u
pnBn- c8cGIAOY) //等待子线程结束 p1ER<_fp //int count = 0; )B5U0iIi //是否结束while循环 bG)6p05Oa boolean breakWhile = false; _xP@kN~ :{xu_"nYr h{E9rc1, while(!bStop) z7*mT}Q { vZSwX@0 write_nPos(); &v r0{]V^ Utility.sleep(500); ljh,%#95= breakWhile = true; &#]||T- mx^rw*'JGC lWU? R for(int i=0;i<nStartPos.length;i++) %U97{y { ^DR`!.ttr if(!fileSplitterFetch.bDownOver) OadGwa\:s { &gvX<X4e breakWhile = false; LFQPysC break; n]wZ7z } Vao3D8 } 8GT{vW9 if(breakWhile) VDv>I 2% break; YW-Ge DTx>^<Tk lN::veD //count++; p:|p? //if(count>4) [-Mfgw]i // siteStop(); qI gb;=V } mY]R~: t*!Q9GC_ bd.t|A System.err.println("文件下载结束!"); x$V[xX } MqswYK-s catch(Exception e){e.printStackTrace ();} If. hA} } gMZ
` -M?s<R[& locf6%2g~ //获得文件长度 ).> O6A4:C public long getFileSize() k%ckV`y { lV<j?I~?Q int nFileLength = -1; *ps")?tlC try{ ob>2SU[Y URL url = new URL(siteInfoBean.getSSiteURL()); c
]&|.~2 & HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Tk0Senq, httpConnection.setRequestProperty("User-Agent","NetFox"); {= l9{K`~ cH\.-5NQ k7Xa|&fQP< int responseCode=httpConnection.getResponseCode(); IqmoWn3 if(responseCode>=400) FDO$(& { Y+#VzIZw processErrorCode(responseCode); :+\B|*T2.L return -2; //-2 represent access is error GbZqLZ0 } skn];%[v\ FOd)zU*L2 Ny)!uqul* String sHeader; veh?oJi@ 2q.J1:lW 6N'v`p8 for(int i=1;;i++) '\.fG\xD { ~!a~ -:# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
^iaG>rvA //Utility.log(in.readLine()); ^<O=<tN\ sHeader=httpConnection.getHeaderFieldKey(i); pElAY3 if(sHeader!=null) Y5Jrkr)k { v9s/!<j if(sHeader.equals("Content-Length")) k~ZE4^dM { li?RymlF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p$
%D break; #Y;_W;# } z<c@<M=Q* } =tE7XC3X_ else !B &%!06 break; *^q%b/ f } }?jL;CCe } xr*hmp1 catch(IOException e){e.printStackTrace ();} 'XHKhpm< catch(Exception e){e.printStackTrace ();} ki[Yu+';} WS?"OTH.^\ ?tLBEoUmKT Utility.log(nFileLength); -_RMiGM?T jKI0d+U 5g3D}F>OJ return nFileLength; G'sEbw'[ } gE>_:s b+.P4+ nDvj*lZF //保存下载信息(文件指针位置) tGcp48R-:+ private void write_nPos() bZ.q?Hlfk { ,dM}B- try{ O%.c%)4Xo output = new DataOutputStream(new FileOutputStream(tmpFile)); G92Ya^` output.writeInt(nStartPos.length); ? LA>5 for(int i=0;i<nStartPos.length;i++) <V-D { Q$NT>d6Q // output.writeLong(nPos); rG _T!']~ output.writeLong(fileSplitterFetch.nStartPos); l H@hV output.writeLong(fileSplitterFetch.nEndPos); cZ{-h } #R<ErX)F output.close(); 0Y8Si^T } 1d4?+[)gUv catch(IOException e){e.printStackTrace ();} o+o'!) catch(Exception e){e.printStackTrace ();} `J%iFm/5* } c 5&
_'& tiI:yq0 s3sAw~++ //读取保存的下载信息(文件指针位置) IXaF(2> private void read_nPos() >8$]g { l0^~0xlED try{ tCFXb6Cz DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); iB =R int nCount = input.readInt(); =}6yMR!4R< nStartPos = new long[nCount]; %z}{jqD&:X nEndPos = new long[nCount]; /T53"+7:0 for(int i=0;i<nStartPos.length;i++) U8+5{,$\. { UQmdm$. nStartPos = input.readLong(); )*=ds, nEndPos = input.readLong(); "Zo<$p3] } WJp9io[GM input.close(); Z=P]UD } n2NxO0 catch(IOException e){e.printStackTrace ();} ev}lb+pr)_ catch(Exception e){e.printStackTrace ();} }IM *Vsk } aNX M~;5~ 8[zux 4<m .DzFtc private void processErrorCode(int nErrorCode) ?pS,?>J f { PyOj{WX>W System.err.println("Error Code : " + nErrorCode); g%P6 f } j06q3N" +HGPn0As 3ZZ"mlk* //停止文件下载 hRU.^Fn#% public void siteStop() I\%a< { bq mb|mD bStop = true; ;7jszs.6% for(int i=0;i<nStartPos.length;i++) Pz+2(Z fileSplitterFetch.splitterStop(); `Bw>0%. Ev
adY 7+!4pf } (#uz_/xXa } =UGyZV:z5 //负责部分文件的抓取 !'y9/ **FileSplitterFetch.java !^~
^D< */ p_^Jr*Mv package NetFox; TuF;>{~} g4Y1*`}2f P2U^%_~ import java.io.*; %rU8^'Gu import java.net.*; xL-]gwq ZDQc_{e{ <'{*6f@n public class FileSplitterFetch extends Thread { F$tshe( Pdq}~um3{ | z1 String sURL; //File URL )=~OP>7B long nStartPos; //File Snippet Start Position [&Yrnkgr long nEndPos; //File Snippet End Position z(00"ei int nThreadID; //Thread's ID |`N|S boolean bDownOver = false; //Downing is over 2=\} 0 boolean bStop = false; //Stop identical 8h,>f#)0c FileAccessI fileAccessI = null; //File Access interface })?t:zX#* `#/0q*$ HLlp+;CF>< public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException No|T#=BZ[ { U*p;N,SjQ this.sURL = sURL; r]sNI[ this.nStartPos = nStart; e-Pn,j this.nEndPos = nEnd; mz[Q]e~&i nThreadID = id; F,[GdE;P fileAccessI = new FileAccessI(sName,nStartPos);//定位 4qsP/`8 } vYPZVqF_$ -Lo3@:2i Em<B9S public void run() Whd\Ub8( { JZl"k while(nStartPos < nEndPos && !bStop) #YiphR& { j[ fE^& w
\ U?64 (C3:_cM5 try{ ~W>3EJghR, URL url = new URL(sURL); {^z>uRZ3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eBZ94rA] httpConnection.setRequestProperty("User-Agent","NetFox"); `X8wnD String sProperty = "bytes="+nStartPos+"-"; (XU(e httpConnection.setRequestProperty("RANGE",sProperty); rk E;OU Utility.log(sProperty); nT:F{2 M; ?LwBF;Y _9pcHhJux InputStream input = httpConnection.getInputStream(); at
)m* //logResponseHead(httpConnection); X21k7 Ls 3FglzJ wni^qs.i@3 byte[] b = new byte[1024]; fe3a_gYPz int nRead; !*\J4bJe while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u6t%*'' { S^ q%+Z nStartPos += fileAccessI.write(b,0,nRead); Ux!q(9<_ //if(nThreadID == 1) ;"9$LHH* // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d5YL=o } F*Y]^9] l:.q1UV *-vH64e Utility.log("Thread " + nThreadID + " is over!"); =mp"=% bDownOver = true; =^5#o)~BB //nPos = fileAccessI.write (b,0,nRead); P-_2IZiz } ]=%oBxWAP catch(Exception e){e.printStackTrace ();} Y(<(!TJ- } 7%sx["%@ } kZK1{ )4;$;a1 2)\gIMt% //打印回应的头信息 L2Z-seE public void logResponseHead(HttpURLConnection con) bCg)PJuB { aJzyEb for(int i=1;;i++) +=Y$v2BZA3 { :m[HUh String header=con.getHeaderFieldKey(i); !<UdG+iV if(header!=null) *G"}m/j- //responseHeaders.put(header,httpConnection.getHeaderField(header)); G@4n]c_ Utility.log(header+" : "+con.getHeaderField(header)); BmI'XB3'P else er0y~ break; 68()2v4X } iI$;%uY3g } h @2.D|c)g FwpTQix! lhBu?q public void splitterStop() bNG7A[|B { 5,#aN}v#? bStop = true; p1']+4r% } C5^9D _X~xfmU ZRP[N)Ld$ } n%d7`?tm4 ,aU8.
J_U T( CTU/a-, /* J l
fIYf~ **FileAccess.java )5ev4Qf
*//文件访问(定位,写) :OD-L)Or package NetFox; axM(3k.n import java.io.*; |o#pd\ m/"}Y]n! /&o<kY public class FileAccessI implements Serializable{ T1A/>\Ns gCZm7dgo //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ,H@ x. RandomAccessFile oSavedFile; nyx(0 long nPos; Og :aflS E.4 X, \^Z DH public FileAccessI() throws IOException "q7pkxEuJ { ?Vc/mO2X this("",0); MmW]U24s } K j6@= xeKfc}:&z 7D=gAMPvJ public FileAccessI(String sName,long nPos) throws IOException "[2D&\$ { zxy/V^mu oSavedFile = new RandomAccessFile(sName,"rw"); ,H5o/qNU`{ this.nPos = nPos; 8RJa;JsH oSavedFile.seek(nPos); jWGX:XB } o(Q='kK ~?:Xi_3Lo dRXdV7-! public synchronized int write(byte[] b,int nStart,int nLen) 1V;m8)RF { m8z414o int n = -1; WbHI>tt try{ Z]k+dJ[- oSavedFile.write(b,nStart,nLen); Q_FL8w9D~8 n = nLen; .!Q?TSQ+{! } {3N5Fi7S catch(IOException e) skBzwVW I { b-)3MR:4 e.printStackTrace (); j?s+#t } =>Dw,+" ez^b{s` Qh,Dcg2ZM" return n; <j^"=UN4# } \j~LxV Yf[GpSej X{;3gN } 42 &m) -LMO
f[v? KGsW*G4U= /* H^0`YQJ3 **SiteInfoBean.java & <Jvaf_= */ =y1/V'2E package NetFox; ?G$X
4KY6` qh~S)^zFJ .="[In' public class SiteInfoBean { MDh^ic5 =]hPX jthGNVZ private String sSiteURL; //Site's URL A]mXV4RmI private String sFilePath; //Saved File's Path 2ZZF hj private String sFileName; //Saved File's Name cT,5xp"a private int nSplitter; //Count of Splited Downloading File o0Pc^ D4W^{/S X~5kgq0" public SiteInfoBean() 2=ZZR8v {//nSplitter的缺省值为5 09C[B+>h //default value of nSplitter is 5 qaN%&K9F8 this("","","",5); -~
5|_G2Y" } d&[.=M\E8 H:&|q+K=# RB `<Zw public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) lhLE)B2a2 { K h;jiK ! sSiteURL= sURL; {Tym# sFilePath = sPath; ILq"/S. sFileName = sName; YJEL'k<l this.nSplitter = nSpiltter; wa}\bNKQk 8I*WVa$l *1fZcw'C. } .}zpvr8YP _&
qM^ _N&]w*ce public String getSSiteURL() 9x0Ao*D<t {
-Y"'=zkO return sSiteURL; WSPlM"h } G>fJ)A T2V#
fYCc (`pd> public void setSSiteURL(String value) zHsWj^m" { crdp`}} sSiteURL = value; y $K#M } ZT;:Hxv0N CH/*MA 7>Oa, \ public String getSFilePath() =Nj58 l { )FfJ%oT} return sFilePath; Cyw
cJ } M;i4ss,}! iqj
ZC80 P_f>a?OL: public void setSFilePath(String value) -}O>m}l { =<M7t*! sFilePath = value; @Yy:MdREA } cNd2XQB9= *8*E\nZx! 0bQm:J[(# public String getSFileName() Q*+_%n1
/ { ,^_aqH return sFileName; MFyMo } gTp){ nPj+mg DNy1} 3wg public void setSFileName(String value) Tmo+I4qoL { !%x=o& sFileName = value; fJ?$Z| } v&>TU(x\H AF
qut =v$H8w public int getNSplitter() $^2 j#]uX { 1z\>>N$7B return nSplitter; :z EhPx;B7 } B(GcPDj(K z5CWgN o >=YoG public void setNSplitter(int nCount) 7b2N'^z} { 9xvE?8;M# nSplitter = nCount; i8`&XGEd } ~?pF'3q } K%: : uxq!kF'Ls nJTV@mXVq /* aQ ~ **Utility.java VvwQz#S */ G;+hc%3y package NetFox; w@Pc7$EP 4=H/-v'& a$c7d~p$I public class Utility { =sP6 wR;_x x -IR9^) public Utility() %$
^yot { ^Slwg|t*~P j.GpJDq ~>@Dn40 } n8zh;vuJ A$RN7# //线程睡眠 A"V3g`dP public static void sleep(int nSecond) lqOv_q { 47"ERfP try{ %S22[;v{N Thread.sleep(nSecond); #gOITXKs } '3wte9E/ catch(Exception e) r4O*0Q_ { bwo" s[w e.printStackTrace (); voaRh@DZ%/ } }k}5\%#li5 } $Q|66/S^ 0Bn$C,- //日志 EOV<|WF> public static void log(String sMsg) xH\'gli/ { `3r *Ae System.err.println(sMsg); ~K^Z4 } G%anot knypSgk_ 8k+Ctk public static void log(int sMsg) '<m[ { 3}$L4U System.err.println(sMsg); (~{7 e/)r } iD@2_m) } 2:i`, Vm&fw".J 4 !~JNO /* Cs%'Af **TestMethod.java ~@R=]l" */ x&)P)H0vn package NetFox; \u,hS*v0 e&F,z=XJ} LP_!g public class TestMethod { >'Nrvy%&0 9ZG.%+l $K\\8$Z public TestMethod() 7P]_03 { ///xx/weblogic60b2_win.exe y{K~g<VL try{ .he%a3e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 34]f[jJ| //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); p%J,af SiteFileFetch fileFetch = new SiteFileFetch(bean); Y cOtPS% fileFetch.start(); *BBP"_$ } :?jOts>uP catch(Exception e){e.printStackTrace ();} 3,tKqR7g -YHlVz ~b8U#'KD } Z'WoChjM ]t7<$L )#Y*] public static void main(String[] args) <8r%_ '] { T\8|Q@ new TestMethod(); nd_d tsp# } InNuK0@ } im%'S6_X4 点击下载更多相关资料
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