-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* Tw;3_Lj **SiteFileFetch.java I
,z3xU */
`yH<E+ package NetFox; tAv@R&W, import java.io.*; t~#zMUfac import java.net.*; mSb#Nn6W Ke2ccN )]H-BIuGm public class SiteFileFetch extends Thread { f>UXD E(8*
pI m;GbLncA SiteInfoBean siteInfoBean = null; //文件信息Bean pw)||Q long[] nStartPos; //开始位置 a@UZb long[] nEndPos; //结束位置 ,l:ORoND FileSplitterFetch[] fileSplitterFetch; //子线程对象 *&^:T~|=! long nFileLength; //文件长度 w.YiO5|y boolean bFirst = true; //是否第一次取文件 #x 177I\ boolean bStop = false; //停止标志 G2Qlt@.T File tmpFile; //文件下载的临时信息 |n,<1QY DataOutputStream output; //输出到文件的输出流 uYs5f.! ` 8L:ji," //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -v]Sr33L public SiteFileFetch(SiteInfoBean bean) throws IOException noml8o { HiR[(5vnf siteInfoBean = bean; hM6PP7XH //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); P;qN(2L/=< tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _0]S69lp if(tmpFile.exists ()) GycSwQ
, { R |(q bFirst = false; ,0~n3G read_nPos(); }}\vV} s } =,_ +0M9 else LIvFx| { H1QJk_RL nStartPos = new long[bean.getNSplitter()]; 8TLgNQP nEndPos = new long[bean.getNSplitter()]; z6jc8Z=O } (nlvl?\d XF;ES3 d ;;C?{ d9;g]uj` } _lGdUt 2 o:3dfO%nuM iB%gPoDCL@ public void run() w~"KA6^ { o7sT=x9 //获得文件长度 ->y J5smtY //分割文件 }NzpiY9 //实例FileSplitterFetch N D(/uyI //启动FileSplitterFetch线程 di6QVRj1 //等待子线程返回 _/6!yyl try{ KLitg6&P if(bFirst) 8&?s#5zA { }%'?p<^M nFileLength = getFileSize(); hRrn$BdLX if(nFileLength == -1) XINu=N(g { g1W.mAA3B System.err.println("File Length is not known!"); s'E2P[: } ND>r#(_\ else if(nFileLength == -2) LYz.Ci} { lyy W System.err.println("File is not access!"); QgU8s'e } \eT5flC else J;{N72 { ]|zp0d=&o for(int i=0;i<nStartPos.length;i++) QxVq^H { *n 6s.$p)% nStartPos = (long)(i*(nFileLength/nStartPos.length)); &eCa0s?mI } )4<__|52"1 for(int i=0;i<nEndPos.length-1;i++) $JJrSwR<h { $Q96,rb}k; nEndPos = nStartPos[i+1]; HkUWehVm } c#Sa]n nEndPos[nEndPos.length-1] = nFileLength; q_g+Jf
P-D } El[)?+;D } +;N2p1ZBf VEqS;~[ bF"G[pD //启动子线程 %,6#2X nX% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %|g>%D3Z? for(int i=0;i<nStartPos.length;i++) TDFkxB> { #h8Sq~0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zF8dKFE~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :Q $K<)[ nStartPos,nEndPos,i); q Gw -tPD< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }Qip&IN fileSplitterFetch.start(); 5_I->-< } nrxo&9[@n // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `\gnl' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ma.`A // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [E!oQVY nEndPos = " + nFileLength); K9$>Yxe| // fileSplitterFetch[nPos.length-1].start(); \?0&0;5 Tx|Ir+f6L 9`I _Et //等待子线程结束 +*ZO&yJQ^< //int count = 0; w+#C-&z //是否结束while循环 a(kg/s boolean breakWhile = false; 6:Ch^c+IZ ]>LhkA@V Z&1T while(!bStop) ysxb?6 { 8\^}~s$$A write_nPos(); V5sg#|& Utility.sleep(500);
FT#8L breakWhile = true; u37'~&o{U 4C<jdv_J JJ}0gZ for(int i=0;i<nStartPos.length;i++) Rot@x r7Hc { kP#B5K_U| if(!fileSplitterFetch.bDownOver) h]+C.Eqnt# { Ne8Cgp breakWhile = false; M dZ&A}S break; Tl$[4heE } - }7e:!. } 8jd;JPz@\ if(breakWhile)
ZHU5SXu break; [ oL.+ h U`wVy *)ardZV${ //count++; 1crnmJ!C //if(count>4) 3nT^?;- // siteStop(); 87<-kV } $@^pAP K`iv c N" i]Fp..`v~ System.err.println("文件下载结束!"); *BR~}1
i } ;>
_$` catch(Exception e){e.printStackTrace ();} OMWbZ>jB } F~%]6^$w [Sr,h0h6 8YZbP5' //获得文件长度 T]t+E'sQ public long getFileSize() A )^`?m3 { GN ]cDik int nFileLength = -1; T&%ux=Jt try{ Kqp(%8mf URL url = new URL(siteInfoBean.getSSiteURL()); G;v8$)Zj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #33fGmd[ httpConnection.setRequestProperty("User-Agent","NetFox"); r"``QmM %X4xv_o`f tk!t
Y8j int responseCode=httpConnection.getResponseCode(); TD'L'm|2 if(responseCode>=400) aGJC1x { As 3.Q(#Z processErrorCode(responseCode); LQ(yScA@ return -2; //-2 represent access is error [s"O mAy4 } 4{hps.$?~ QW$G jGXO\:sO String sHeader; ofPHmh` UUzYbuS>&l =NnNN'} for(int i=1;;i++) i=i(%yQ% { v@Gl|29_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "}q@Y= //Utility.log(in.readLine()); OK{quM5 sHeader=httpConnection.getHeaderFieldKey(i); tSVc|j if(sHeader!=null) qQA}Z*(m { k5D%y3|9 if(sHeader.equals("Content-Length")) (@%gS[] { V.O(S\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); xl6,s>ob break; giZP.C"0 } +Vm}E0Ov } o*DN4oa) else r G4';V^q break; MS\>DW } !G SV6 } v%"|WV[N catch(IOException e){e.printStackTrace ();} 85n1eE catch(Exception e){e.printStackTrace ();} D}dn.$ iVB86XZ` wF|fK4F Utility.log(nFileLength); NWM8[dI V n* 3pv4B:0 return nFileLength; O-LO/*5MI } ` D= S{
S/D^ R]OpQ[k //保存下载信息(文件指针位置) )z&/_E= private void write_nPos() 'NX```U0 { #9X70|f try{ /LO-HnJ output = new DataOutputStream(new FileOutputStream(tmpFile)); f!s=(H; output.writeInt(nStartPos.length); Zb1<:[ for(int i=0;i<nStartPos.length;i++) q:dHC,fO { t.laO. 3 // output.writeLong(nPos); /9HVY
%n output.writeLong(fileSplitterFetch.nStartPos); k Mu8"Az output.writeLong(fileSplitterFetch.nEndPos); *^f<W6xc } lTd #bN output.close(); x7~r,x(xM } rW+ =,L catch(IOException e){e.printStackTrace ();} H-~6Z",1 catch(Exception e){e.printStackTrace ();} QA<Jr5Ys } XmEq2v GM3f-\/ qOSM}ei>s //读取保存的下载信息(文件指针位置) w*oeK private void read_nPos() 4<% *E{` { nq6@6GRG try{ :/Q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \~fONBY int nCount = input.readInt(); {5F-5YL+> nStartPos = new long[nCount]; +n#V[~~8AI nEndPos = new long[nCount]; $e*ce94 for(int i=0;i<nStartPos.length;i++) m|{3),#V { }HY-uQ%@g nStartPos = input.readLong(); w+yC)Rmz nEndPos = input.readLong(); F )W: } _>|
=L
W@7 input.close(); R~)\3] "2m } @7?#Y|` catch(IOException e){e.printStackTrace ();} kg'o&^/= catch(Exception e){e.printStackTrace ();} {vuZ{IJa } KU8Jbl*
E=>FjCsu<- .ox8*OO< private void processErrorCode(int nErrorCode) &Rvm>TC= { 1XD,uoxB
System.err.println("Error Code : " + nErrorCode); @>p<3_Y1 } j!]YNH@ fZ*+2T>
hRs&t,{& //停止文件下载 CC L public void siteStop() QKr,g { ^R# E:3e bStop = true; ptU\[Tq for(int i=0;i<nStartPos.length;i++) *T5!{ fileSplitterFetch.splitterStop(); w]]8dz ]=>F.GE .
koYHq } =~=*&I4Dp } C!fMW+C@ //负责部分文件的抓取 BFo5\l:q8 **FileSplitterFetch.java LUqB&,a} */ [[;e)SoA package NetFox; 6f\Lf?vF }Q=!Y>Tc dvt9u9Vg= import java.io.*; T3k#VNH import java.net.*; vvKEv/pN7 A1.7O zmSUw}-4N public class FileSplitterFetch extends Thread { _Em. ><gG8MH0' pKit~A,Q String sURL; //File URL bT^I" long nStartPos; //File Snippet Start Position 5u*-L_ long nEndPos; //File Snippet End Position 'H
\9:7 int nThreadID; //Thread's ID no<
^f]33 boolean bDownOver = false; //Downing is over @>W(1mRi boolean bStop = false; //Stop identical Z@]e{zO FileAccessI fileAccessI = null; //File Access interface .
r[Hu40p DV<` K$ET cd$m25CxC public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException a{
?`t| { PfC!lI
BU this.sURL = sURL; I?ae\X@M this.nStartPos = nStart; %Ti}CwI` this.nEndPos = nEnd; m^GJuPLW nThreadID = id; Si6al78 fileAccessI = new FileAccessI(sName,nStartPos);//定位 2vAQ } =o& >fw a2
Y;xe o]; [R public void run() L$IQuy { G0^2Wk[ while(nStartPos < nEndPos && !bStop) 6~1|qEe6I { ~TSy<t~%- gx\&_)w N >hk=VyU; try{ )u/yF*:n URL url = new URL(sURL); QA5QweL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HN&Z2v httpConnection.setRequestProperty("User-Agent","NetFox"); FRg^c
kb" String sProperty = "bytes="+nStartPos+"-"; Aq0S-HKF httpConnection.setRequestProperty("RANGE",sProperty); >rJnayLF Utility.log(sProperty); S$Q8>u6Wk ]>~)<
M;p
em< InputStream input = httpConnection.getInputStream(); IHJ=i- //logResponseHead(httpConnection); /J:bWr BV>\ McI+ 2@%$;. byte[] b = new byte[1024]; <iH`rP# int nRead; ^OstR`U3 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h $L/<3oP6 { (UU(:/ nStartPos += fileAccessI.write(b,0,nRead); ]cGA~d //if(nThreadID == 1) A7%:05 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UG'9*(* } XVvK2( 5ZMR,SZhC G|(
]bvJ? Utility.log("Thread " + nThreadID + " is over!"); j}~86JO+Cw bDownOver = true; 2Fq<*pxAY
//nPos = fileAccessI.write (b,0,nRead); BPdfYu,il } o[cV1G catch(Exception e){e.printStackTrace ();} l,,>& F } pBETA'fY } }RwSp!}C S%yd5<%_ a^=-Mp //打印回应的头信息 3WUTI( public void logResponseHead(HttpURLConnection con) ($}`R
xj1@ { :&:JTa1cv for(int i=1;;i++) TW[_Ko86 { ?)`L$Vr= String header=con.getHeaderFieldKey(i); 5lm<% if(header!=null) d"6&AJ5a //responseHeaders.put(header,httpConnection.getHeaderField(header)); c2e
tc8 Utility.log(header+" : "+con.getHeaderField(header)); ?zQA else K9OYri^TQ break; xv&Q+HD } qeL5D* } JvT"bZk(o }(1JaG ~fT_8z public void splitterStop() pb$~b\s]= { WV #%PJ bStop = true; v7DE } _ B5gR zJ)*Z,7 'rr^2d]`ST } il \$@Bn p~9vP)74u OnK~3j /* D;_ MPN[ **FileAccess.java G=A,9@+c *//文件访问(定位,写) T`Mf]s)* package NetFox; JXu$ew>q import java.io.*; w\DVzeW( pGK;1gVj l"2OP6d public class FileAccessI implements Serializable{ w*|7!iM {WPobP" //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Qbyv{/ RandomAccessFile oSavedFile; R8T]2?Q1 long nPos; '*k'i;2/1 tWoh''@# GF5^\Rf public FileAccessI() throws IOException E5N{j4\F { hYM@?/(q this("",0); Xa[?^P } ;\\@q"n%< Vgyew9>E 6p?JAT5 public FileAccessI(String sName,long nPos) throws IOException \@1=stK:F { &bp=`=* oSavedFile = new RandomAccessFile(sName,"rw"); e`v`XSA[p this.nPos = nPos; @$2))g` oSavedFile.seek(nPos); %o:2^5\W } I<8sI%,s |7}CQU a'jR#MQl? public synchronized int write(byte[] b,int nStart,int nLen) ?zsB6B?; { 9 `w) int n = -1; HH@qz2 w try{ ^>N]H>0'S oSavedFile.write(b,nStart,nLen); 'qF#<1& n = nLen; `A,g] 1C: } A%{W{UP8N catch(IOException e) LJ(1RK GCz { A^2Uzmzl? e.printStackTrace (); &g~ wS@ } KhW;RD }GZ}Q5 `p7&>
BOA return n; K%Rj8J7|u? } {nvLPUL GKFq+]W 3RR_fmMT) } 1[t=XDz/e U=o"32n+ 't9hXzAfW /* _+^ 2^TW **SiteInfoBean.java =l0Jb#d */ }QsZ:J. package NetFox; 2d {y M(=( {|yob4N fz3lV public class SiteInfoBean { ~35U]s@v /2HN>{F^Y Cc, `}SP private String sSiteURL; //Site's URL 7zv1wb private String sFilePath; //Saved File's Path ]+m/;&0 private String sFileName; //Saved File's Name m/@<c'i private int nSplitter; //Count of Splited Downloading File 9Y<#=C C>[fB|^ A,)VM9M_l public SiteInfoBean() ,E$@=1) {//nSplitter的缺省值为5 _C+b]r/E //default value of nSplitter is 5 XbZ*& this("","","",5); 60)iw4<wf } hAjM1UQ,Y d)"?mD:m/M bC3 F public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 4ON_$FUe { I6s3+x;O sSiteURL= sURL; |/| sFilePath = sPath; `WOYoec
sFileName = sName; yj$TPe_BW this.nSplitter = nSpiltter; ,.o<no U7DCx=B >R2SQA o } d|*"IFe wV)}a5+ \xUe/= public String getSSiteURL() !!:LJ { wHem5E return sSiteURL; ;kJu$U } 2Gs$?}"a .?>5-od2 snt(IJQ public void setSSiteURL(String value) 7 uarh! { n
8pt\i0 sSiteURL = value; _6Eu2|vM& } D>!6,m2 eJo3 MK /LM4-S public String getSFilePath() rO:u6."_ { cf7v[ZZ} return sFilePath; w?,M}=vg } KnNh9^4"\2 }rdIUlVO\ c0Dmq)HK? public void setSFilePath(String value) kpI{KISQu { \M"UmSB o sFilePath = value; olW|$? } 6ITLGA *E~VKx1 5eA8niq# public String getSFileName() jkF8\dR { :EtMH( return sFileName; '>v^6iS } =U.
b% uC D5an\gE X{g%kf,D= public void setSFileName(String value) gLSA!#[h { $y?k[Y-~ sFileName = value; G3G6IP } =9LC<2 f):~8_0b R4<lln:[ public int getNSplitter() z1!6%W_. { oy<J6 return nSplitter; 2 /y}a#s } oR*=|B M-
0i7% do-c1;M public void setNSplitter(int nCount) CWO=0_>2 { m ga6[E< nSplitter = nCount; Se!)n;?7Sw } Fn^C{p^ } GyC /_ntn - /c7nF %k0EpJE% /* R1-k3;v^ **Utility.java J@9}`y=K */ ~^vC,]hU package NetFox; -K[782Q T#O??3/%$1 jvVi%k public class Utility { b8f+,2Tk "*7C`y5&P *g;-H&` public Utility() <TNk?df7 { ^\:2}4Uj_ (H?ZSeWx Z7jX9e"L } o;[bJ
Z\^x [k]|Qink //线程睡眠 nVD Xj public static void sleep(int nSecond) Yn9j-` { vRPS4@9' try{ }xFi&
< Thread.sleep(nSecond); -iCcoA } &D#+6M&LK{ catch(Exception e) +[m8c){ { <1&Ke e.printStackTrace (); <3hA!$o~ } K<v:-TjQZ: } ,PWj_}|L[ 9YF$CXonE= //日志 s T3p>8n public static void log(String sMsg) :Y)to/h { (RXS~8 System.err.println(sMsg); D*vm
cSf } Pj7gGf6v Ak~4|w- cbKL$| public static void log(int sMsg) 6(sIYZ2yq { S2~@nhO`U( System.err.println(sMsg); }iIbcA } `eRLc}aP2 } J<JBdk )'q%2%Ak A2x;fgi /* |)@N-f:E **TestMethod.java -cNx1et */ gY`Nr!O package NetFox; |
W#~F&{] OYf{?-QD ~_ !ts{[E public class TestMethod { Xz;b,C&*t MY-.t-3 a%hGZCI public TestMethod() @XOi62( { ///xx/weblogic60b2_win.exe G+)?^QTn try{ |Vx~fK S\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); -O&"| //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); z^sST SiteFileFetch fileFetch = new SiteFileFetch(bean); GH'O!} fileFetch.start(); {TZE/A3D, } u9![6$R catch(Exception e){e.printStackTrace ();} |0{ i9.= Kla:e[{ um8AdiK } R9.HD?H@ FsCwF&/q 'o\;x"YJ public static void main(String[] args) QJ];L7Hbo { L(WOet( ' new TestMethod(); _g6m=N4 } Sb^
b)q" } gJ\%>r7h 点击下载更多相关资料
|