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/* G6X **SiteFileFetch.java |q$br-0+ */ ],%}}UN package NetFox; +M9=KVr import java.io.*; p-U'5<n import java.net.*; @:DS/#! )i; y4S htg+V-, public class SiteFileFetch extends Thread { cm]D"GFLY BaIh,iu qIQvix$8 SiteInfoBean siteInfoBean = null; //文件信息Bean k|l"Rh<\~ long[] nStartPos; //开始位置 [!>2[bbl long[] nEndPos; //结束位置 5Am*1S^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 Fs:l"5~>1 long nFileLength; //文件长度 [|~X~AO% boolean bFirst = true; //是否第一次取文件
ZMJ\C|S: boolean bStop = false; //停止标志 s#sr1[9}G File tmpFile; //文件下载的临时信息 <_""4 DataOutputStream output; //输出到文件的输出流 ^r=#HQGt <PkDfMx2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) M3 8,SH< public SiteFileFetch(SiteInfoBean bean) throws IOException %V;k/w~[ { 6m21Y8N siteInfoBean = bean; Cm}ZeQ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Zl"h-~31 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); >fo &H_a if(tmpFile.exists ()) LJZEM;;} {
3 Yl[J;i bFirst = false; 'dj}- Rs read_nPos(); dQA J`9B } 5n.4>yOY else W5:S+ { pM[UC{ nStartPos = new long[bean.getNSplitter()]; I?-9%4 8iM nEndPos = new long[bean.getNSplitter()]; R|!4Y` } (B]Vw+/ /]]\jj#^ ZH:#~Zyj $K<jmEC@< } 7Yj\*N zGZe|- 9
J5Z'd_ public void run() \/K>Iv'$ { RW>Z~Nj //获得文件长度 ;
@Gm@d //分割文件 X+iA"B //实例FileSplitterFetch w/G5I )G //启动FileSplitterFetch线程 R52q6y:<x //等待子线程返回 )IZ$R*Y{ try{ Ev0V\tl>0 if(bFirst) s3kh (N { mq'q@@:c nFileLength = getFileSize(); 7SAu">lIl if(nFileLength == -1) m/Yi;>I( { D zDt:.JZ System.err.println("File Length is not known!"); m
U7Ad" } aeUm,'Y$ else if(nFileLength == -2) ci3{k" { qLYv=h$, System.err.println("File is not access!"); t4s}w$4 } F>*w)6 4~ else zi*D8!_C { ]]%C\Ryy} for(int i=0;i<nStartPos.length;i++) ` S85i* { ?wwY8e?S nStartPos = (long)(i*(nFileLength/nStartPos.length)); JI\u -+BE } SKRD{MRsux for(int i=0;i<nEndPos.length-1;i++) j1d#\ { yMz@-B nEndPos = nStartPos[i+1]; 2?-}(F;Z } hDp'=}85@ nEndPos[nEndPos.length-1] = nFileLength; a+]=3o } yx/:<^"-$ } `hH1rw@7< )XO2DY1/& SxT:k,ji //启动子线程 ,9+@\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _'j>xK for(int i=0;i<nStartPos.length;i++) PS=crU@"H { PwDQ<
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @$(4;ar siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
2EE#60 nStartPos,nEndPos,i); +U6!
bu>C Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); * rs_k/2( fileSplitterFetch.start(); q(uu;l[ } \*_a#4a // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2,_BO6
!d siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =~HX/]zF // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6(ja5)sn* nEndPos = " + nFileLength); 9Xm"kVqd/ // fileSplitterFetch[nPos.length-1].start(); {ZfTUt)-P g" M1HxlV &$+yXN //等待子线程结束 ]q?<fEG2< //int count = 0; St(7@)gvY //是否结束while循环 LTa9'
q0 boolean breakWhile = false; :W'1Q2 E26ZVFg ;CU3CLn while(!bStop) da2BQ; { 2oq>tnYyV[ write_nPos(); q+m&V#FT% Utility.sleep(500); K):)bL(B breakWhile = true; ) I5f`r=Ry h"<rW7z xwz2N5 for(int i=0;i<nStartPos.length;i++) Kk/qd)nk { P|64wq{B8 if(!fileSplitterFetch.bDownOver) ]*v%(IGK { :z^c<KFX breakWhile = false; G-;pMFP(? break; CP={|]>+S } -$mzzYH } US
Q{o if(breakWhile) p_mP' break; 8~4{e,} , Z/2#h<zj fHe3 :a5+W //count++; EW YpYMkm //if(count>4) 8# 9.a]AX // siteStop(); 3tgct <" } o 0fsM;K aA\v
"S6d^ System.err.println("文件下载结束!"); JZai{0se } %40|7O catch(Exception e){e.printStackTrace ();}
!$&K~>` } 8vchLl# R|5w :+=z =G*<WcR //获得文件长度
1vQ*Br public long getFileSize() O~igwFe { `@eQL[Z9x int nFileLength = -1; ?HU(0Vgn' try{ rw58bkh6 URL url = new URL(siteInfoBean.getSSiteURL()); QDLtilf : HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hXZk$a' httpConnection.setRequestProperty("User-Agent","NetFox"); _d,_&7 d+z8^$z" QL int responseCode=httpConnection.getResponseCode(); w 8T#~Dc if(responseCode>=400) i]YH"t8GY { (AV j_Cw processErrorCode(responseCode); Lw2EA 5 return -2; //-2 represent access is error Y+lZT4w } 4fQ<A <2/ 3-z57f,}6~ i.6c;KU String sHeader; C+jlIT+ a$"3T Qp]V~s( for(int i=1;;i++) T[q2quXgk { -PoW56 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); arET2(h //Utility.log(in.readLine()); PA&Ev0`+ sHeader=httpConnection.getHeaderFieldKey(i); RMDzPda. if(sHeader!=null) Z`T]jm-3 { ^e1@o\] if(sHeader.equals("Content-Length")) }k~ih?E^s { l|j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +d>?aqI\A break; yX0nyhq } <Y:{>= } X @RS
/ else +0_e a~{ break; m%]1~b}" } i}[cq_wJ } Y 3h`uLQ catch(IOException e){e.printStackTrace ();} ose(#n4 0 catch(Exception e){e.printStackTrace ();} :m]H?vq] \ xhK8Q E2K{9@i Utility.log(nFileLength); xy))}c% 1o`zAJ8|2 ,sI<AFI return nFileLength; y)vK=," } EMQGP<[ cD6S;PSg lonV_Xx //保存下载信息(文件指针位置) {ppzg`G\ private void write_nPos() /s*.:cdH { @GUlw[vi try{ 'b)qP| output = new DataOutputStream(new FileOutputStream(tmpFile)); <yl%q*gls output.writeInt(nStartPos.length); Co>e<be%S for(int i=0;i<nStartPos.length;i++) 76H>ST@G| { VWq]w5oQO // output.writeLong(nPos); s@Dln
Du. output.writeLong(fileSplitterFetch.nStartPos); plL|Ubn output.writeLong(fileSplitterFetch.nEndPos); A:yHClmn } J0V`sK output.close(); bTU[E } e, N}z catch(IOException e){e.printStackTrace ();} m8@&-,T catch(Exception e){e.printStackTrace ();} n{u\t+f } d~1uK-L]* Mg#yl\v F~q(@.b //读取保存的下载信息(文件指针位置) &rG B58 private void read_nPos() ^M{,{bG { WQ{[q" O try{ _0(%^5Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ak7kb7 5o int nCount = input.readInt(); D"rbQXR7$ nStartPos = new long[nCount]; s3HVX' nEndPos = new long[nCount]; h%:rJ_#Zl for(int i=0;i<nStartPos.length;i++) As< B8e] { W%4=x>J- nStartPos = input.readLong(); GlnO8cAB nEndPos = input.readLong(); ,Cb3R|L8 } N ai5!_' input.close(); @^A5{qQ\ } HcgvlFb catch(IOException e){e.printStackTrace ();} XEgJ7h_ catch(Exception e){e.printStackTrace ();} %8,$ILN } TG%B:^Yz! $#q`Y+;L2 L.Qz29\ private void processErrorCode(int nErrorCode) MF8-q'upyT { b~J)LXj]w System.err.println("Error Code : " + nErrorCode); N ~{N Nf Y } X*QS/\ H5T_i$W LWyr //停止文件下载 1@DC#2hPr public void siteStop() D7;9D*o\ { {drc}BL_ bStop = true; L5-|-PP|; for(int i=0;i<nStartPos.length;i++) EU$.{C_O( fileSplitterFetch.splitterStop(); TaN{xpo z3Q&O$5\ mHxR4%i5 } l4>^79* * } qI+2,6
sGI //负责部分文件的抓取 <h/%jM>9/ **FileSplitterFetch.java .UG`pRC */ [d: u( package NetFox; >?, Zn ~SnUnNDm ` FEaT}/h; import java.io.*; ilA45@ import java.net.*; s/E|Z1pg3 l4OrlS/ 5 g8W,Xq+ public class FileSplitterFetch extends Thread { i[o 2(d, nlwqS Xw an"&'D}U String sURL; //File URL x HRSzYn$ long nStartPos; //File Snippet Start Position gc9R;B1 long nEndPos; //File Snippet End Position 9a}9cMJ^" int nThreadID; //Thread's ID eU[g@Pq:Y boolean bDownOver = false; //Downing is over 2cR[~\_9. boolean bStop = false; //Stop identical -U d^\Yy FileAccessI fileAccessI = null; //File Access interface Fx9-A8oIR (W
~K1] ?'a8QJo public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException YuX JT* { "mlQ z4D)5 this.sURL = sURL; v pI9TG this.nStartPos = nStart; oBzl=N3< this.nEndPos = nEnd; 2jsbg{QS#_ nThreadID = id; +P/kfY" fileAccessI = new FileAccessI(sName,nStartPos);//定位 fz&B$1;8 } 34@ [ZKJ5 7=!9kk 0 (]|h6aI'} public void run() wQ}r/2n|^ { y.r N( while(nStartPos < nEndPos && !bStop) nbi7rcT { /:{%X(8 6TtB3;5 }3pM,. try{ Ve,g9 I URL url = new URL(sURL); !`DRJ)h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _plK(g-1J% httpConnection.setRequestProperty("User-Agent","NetFox"); !X>u.}?g String sProperty = "bytes="+nStartPos+"-";
~+q1g[6 httpConnection.setRequestProperty("RANGE",sProperty); !jCgTo
y Utility.log(sProperty); "M I';6 yI0bSu<j- *@U{[J InputStream input = httpConnection.getInputStream(); &#r+a' //logResponseHead(httpConnection); 7Cgi& Bo 35L:r| qd`e:s*% byte[] b = new byte[1024]; n3^(y"q int nRead; Zt=|q$" while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ua\t5M5 { 0[;2dc nStartPos += fileAccessI.write(b,0,nRead); @^{Hq6_`
//if(nThreadID == 1) FG? Mc'r& // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7[m?\/K~ } QY\k3hiqn IwYeKN6s a#oROb-*~ Utility.log("Thread " + nThreadID + " is over!"); tvkdNMyX%9 bDownOver = true; 6j#JhcS+ //nPos = fileAccessI.write (b,0,nRead); <p@Cx } B#sCB&( catch(Exception e){e.printStackTrace ();} wxN)dB } m[DQ;`Y } !avol/* j=\h|^gA c`6c)11K //打印回应的头信息 R@e'=z[%1 public void logResponseHead(HttpURLConnection con) 6].[z+ { BK$y>=
` for(int i=1;;i++) b@CB +8$ { `L1,JE`
q String header=con.getHeaderFieldKey(i); (?FH`< if(header!=null) ]5%0EE64 //responseHeaders.put(header,httpConnection.getHeaderField(header)); rd <m:r Utility.log(header+" : "+con.getHeaderField(header)); QcegT/vO else ts]e M1; break; }=R]<`Sj.j } J^!;$Hkd } ?K1B^M=8 D9rQ%|}S E)b$;' public void splitterStop() ChBf:`e { >XN[KPTa bStop = true; H MOIUd } A(Ct^/x- {v={q1 "be\%W+< } Ple.fKu # :+Nr unDW2#GX /* 8$FH;= **FileAccess.java s 6Wp"V( *//文件访问(定位,写) Bk8}K=%w package NetFox; vu0Ql1 import java.io.*; ,0'GHQWz$ LKN7Lkl iUkUo x public class FileAccessI implements Serializable{ D?Oe";"/ uHbg&eW //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 2- iY:r RandomAccessFile oSavedFile; %0\@\fC41 long nPos; iSfRJ:_&6
e=]SIR()` Jb,54uN public FileAccessI() throws IOException ~DH9iB { +%5 L2/n7 this("",0); "&L8d(ZuA } y_PA9#v7 \p^V~fy7rU fECV\Z public FileAccessI(String sName,long nPos) throws IOException QO@86{u#Y { 74^v('-2 oSavedFile = new RandomAccessFile(sName,"rw"); @ZEBtM%.O this.nPos = nPos; #p+iwW- oSavedFile.seek(nPos); L:
$
`8 } wd:Yy *QK)
1Y1W 2EgvS!" public synchronized int write(byte[] b,int nStart,int nLen) V#G)w~
{ lpT&v;$` int n = -1; @$slGY try{ 5OM#_.p oSavedFile.write(b,nStart,nLen); fW= N n = nLen; }6Pbjm * } 4!sK>l! catch(IOException e) F .S^KK { CU=sQfE e.printStackTrace (); !7t&d } |s3;`Nxu7 =r]l"T f@}>:x return n; Wvl~|Sx] } c5p,~z_Dtu y;o - @] AojL4H| } ByqVNz0L #WjQ'c: ~vTwuc\(H /* 6B]=\H **SiteInfoBean.java k A=5Kc */ }NDl~5 package NetFox; !-M Y<' s.4+5rE =!-} q public class SiteInfoBean { 4eWv). &~2m@X(o WIU]>_$. private String sSiteURL; //Site's URL J4+WF#xI2 private String sFilePath; //Saved File's Path Y. J!]| private String sFileName; //Saved File's Name Bq$IBAot private int nSplitter; //Count of Splited Downloading File rp\`uj*D 0n:cmML)D ;6 @sC[ public SiteInfoBean() I^EZ s6~ {//nSplitter的缺省值为5 'goKYl#1Q //default value of nSplitter is 5 )l9KDObis this("","","",5); {m!5IR } r 10VFaly gcnX^[`S 2|x
!~e. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =?$~=1SL+ { X<5fn+{]S: sSiteURL= sURL; tN<X3$aN sFilePath = sPath; M(L6PyEa!Y sFileName = sName; t Cb34Wpf this.nSplitter = nSpiltter; WOZuFS13 $B8Vg `+ .K84"Gdx } f I=G>[ qkKl;Z?Y: uD@ZM public String getSSiteURL() |!]
"y< { 7;|"1H:cmw return sSiteURL; S3/%;=| } E"9(CjbQ[ 0U~$u )Zr\W3yWX public void setSSiteURL(String value) Ho&:Zs { 6!>p<p"Ns sSiteURL = value; 2*Qi4%s# } y5F+~z}{ ?PWg Eu' ;f_s public String getSFilePath() Mv%Qze,\V^ { oc)`hg2= return sFilePath; lIS`_H} } (1|wM+)" Hrpz4E%\Aw "LlQl3"= public void setSFilePath(String value) .KKecdd?= { Uk] jy>7;! sFilePath = value; Awa| (] } )Mdddz4 \{`^Q+< }|
MX=:@* public String getSFileName() !O%!A<3 { d7](fw@c return sFileName; joskKik^ } n[0u&m8 m6[}KkW -9FGFBm4] public void setSFileName(String value) (9RfsV4^ { i<F7/p "- sFileName = value; LUD. } z |llf7: ss%, }(8>& public int getNSplitter() @U8u6JNK' { 4*qBu}( return nSplitter; 0Qa0 } uCr& ` `sqr>QD "6\5eFN; public void setNSplitter(int nCount) WF`%7A39Af { g8uqW1E^ nSplitter = nCount; pZ'q_Oux } " Bx@( } cZ_)'0
vQLYWRXiA ^'E^*R /* fYjmG[4 **Utility.java y/\b0& */ I9zs package NetFox; '(@q"`n l SdA7 nC p/.]Y* public class Utility { w{aGH/LN *@' 'OyL [T_[QU:A public Utility() }{N#JTmjB# { ,;}
!6=s{V&r1 8_!qoW@B } 5%\K : ir#7/ //线程睡眠 gGvL6Fu public static void sleep(int nSecond) VYb,Hmm>kC { m+'1c}n^7 try{ 4j3_OUwWZx Thread.sleep(nSecond); ;>Z+b#C[ } )8oyo~4? catch(Exception e) >97YK = { \@Cz 32wg e.printStackTrace (); |.Vgk8oTl } D Z*c.|W } ppIXS( .)tQ&2
//日志 P
s>Y] public static void log(String sMsg) 3\Xk)a_ { R-zS7Jyox System.err.println(sMsg); `/T.u&QF } |Jx:#OM )8^E{w^D} MMrN#&r public static void log(int sMsg) }R+#>P { AAfU]4u0S System.err.println(sMsg); ?wkT=mv } D,..gsg } #Db^* r(wf>w3 ep3VJ"^ /* ,1 H|{ < **TestMethod.java tOVTHx3E] */ v @M6D} package NetFox; c86?-u') -,*m\Fe} rCqwJoC`v public class TestMethod { 56YqYu. nnhI]#,a{ u `w w public TestMethod() c[,Rhf { ///xx/weblogic60b2_win.exe 7p'pz8n`X try{ %Qj$@.*:
SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); v"
#8^q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !ck luj SiteFileFetch fileFetch = new SiteFileFetch(bean); IN6L2/Q fileFetch.start(); HrLws95' } H;a) `R3 catch(Exception e){e.printStackTrace ();} EpACd8Fb @ukL!AV?Y J s33S) } )RFY2} FDF DB 4VF]tX?o public static void main(String[] args) (oCpQDab@ { qldm"Ul new TestMethod(); Z8h;3Ek } j?tE# } 6C"${}SF` 点击下载更多相关资料
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