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/* -v7O*xm" **SiteFileFetch.java SH${ \BKup */ SvD^'(
x package NetFox; t)/:VImY import java.io.*; ^-i<TJ import java.net.*; ;+h-o juc;]CHt' geB]~/-p public class SiteFileFetch extends Thread { Ue22,Pp6 >k{KwFB^S e+=P)Zp/ SiteInfoBean siteInfoBean = null; //文件信息Bean (77EZ07% long[] nStartPos; //开始位置 ($ l
t@j long[] nEndPos; //结束位置 >m;*Zk` FileSplitterFetch[] fileSplitterFetch; //子线程对象 R7xEE7p long nFileLength; //文件长度 J|A:C[7 2 boolean bFirst = true; //是否第一次取文件 dNMz(~A[Y boolean bStop = false; //停止标志 Y"&1jud4xl File tmpFile; //文件下载的临时信息 t*'U|K4L/ DataOutputStream output; //输出到文件的输出流 F ak"u'~ =`MU*Arcs[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) v{dvB:KP5X public SiteFileFetch(SiteInfoBean bean) throws IOException pl.K*9+ { rWo&I_{ siteInfoBean = bean; J(JqusQd ! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;jgJI~3l tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
=(Ll}V , if(tmpFile.exists ()) -h/KrB { >^fkHbgNQ bFirst = false; eQvdi|6 read_nPos(); $yA2c^QS } !?~>f>js_l else >X"V { 56
raZC nStartPos = new long[bean.getNSplitter()]; TQ\\/e: nEndPos = new long[bean.getNSplitter()]; <CnTiS# } lZa L=HS#L &:"[hU xYGB{g] $ }D9)&f; } X^;LiwQv 4pfv?!Oj 5@xl/ public void run() ;%H/^b.c { K !MIA //获得文件长度 |tkhsQ-; //分割文件 *j0kb"# //实例FileSplitterFetch
g^dPAjPQ //启动FileSplitterFetch线程 sZ!/uN!6 //等待子线程返回 CI };$4W~ try{ XvIrO]F- if(bFirst) ED+tVXyw { k5%:L2FO nFileLength = getFileSize(); M!e$h?vB if(nFileLength == -1) 2X t$KF,? { ;ESuj'*t System.err.println("File Length is not known!"); C=z7Gk= } U%~L){<V[ else if(nFileLength == -2) UmRI! WQl { k}yUD 0Y System.err.println("File is not access!"); U[Pll~m2b } C
{GSf`D!T else -`o22G3w { 8=#J:LeXj for(int i=0;i<nStartPos.length;i++) w9J^s<e { pg.z `k nStartPos = (long)(i*(nFileLength/nStartPos.length)); 7fg +WZ } @+3@Z?!SZ for(int i=0;i<nEndPos.length-1;i++) i"{ \ > { 6H\apgHm nEndPos = nStartPos[i+1]; X~ AE?? } I C6}s nEndPos[nEndPos.length-1] = nFileLength; ;
iK9'u }
b :,S } N<\U$\i ]ctlK'. ^\X-eeA //启动子线程 ;be2sTo fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <opBOZ
d for(int i=0;i<nStartPos.length;i++) `6.rTs$< { Wy2 pa
#Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S]7RGzFe siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x[,HK{U|t nStartPos,nEndPos,i); jJN.( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P1Z+XRWOM fileSplitterFetch.start(); L(yR"A{FsE } D-[`wCa, // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O<1qU
M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); V_&>0P{q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", X$L9kZ nEndPos = " + nFileLength); \Ami-<T // fileSplitterFetch[nPos.length-1].start(); MMpGI^x!-X XkWO -L 0t-!6 //等待子线程结束 @@,l0/ //int count = 0; 1HF=,K+ //是否结束while循环 g?'4G$M boolean breakWhile = false; c:/H}2/C `(r[BV|h} eJ+uP,$ while(!bStop) }K!)Z}8 { b-1cA1#_cP write_nPos(); !NNq( t Utility.sleep(500); dJZMzn breakWhile = true; J~6-}z >&|C
E2' O;u&>BMk for(int i=0;i<nStartPos.length;i++) Pw^lp'dO { ZR~ *Yofy if(!fileSplitterFetch.bDownOver) wz-#kH5? { HbRDa breakWhile = false; p/4\O break; '\$2+* } 0$ -N } cMCGaaLU if(breakWhile) poqcoSL"} break; r.5}Q? _`/:gkZS &uh|!lD //count++; ;E8.,#/a //if(count>4) =AhXEu ^ // siteStop(); 6n{`t/ } ~mqiXr8 `g2DN#q[0 `wJR^O!e System.err.println("文件下载结束!"); 6]=R#d 7U } uY,(3x catch(Exception e){e.printStackTrace ();} 1rr\l` } y{.s
4NT 4,o|6H -.8 nEO3 //获得文件长度 L#Mul&r3x0 public long getFileSize() 2L#$WuM~^ { LRqBP|bjCD int nFileLength = -1; hJavi>374 try{ <<zYF.9L] URL url = new URL(siteInfoBean.getSSiteURL()); KaJCfu yp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CzF#feTA httpConnection.setRequestProperty("User-Agent","NetFox"); s3+^q .^<4] wic&
$p/% int responseCode=httpConnection.getResponseCode(); }n+#o!uEf if(responseCode>=400) eIzT(3( { |U*wMYC processErrorCode(responseCode); X~DI d return -2; //-2 represent access is error H\OV7=8 } SH"e x,= gK {-eS @z8,XW
} String sHeader; &-Bw7v l-Hp^|3Wq /bE=]nM for(int i=1;;i++) >tf y\P Y: { %!5[3b'h //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,O[HX?> //Utility.log(in.readLine()); "r6DZi(^K sHeader=httpConnection.getHeaderFieldKey(i); wI!>IV(5 if(sHeader!=null) orB8q(( { :G/T{87H if(sHeader.equals("Content-Length")) ,&Iw5E[ { K:!|xr(1d nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]]
R*sd* break; ('q u#.' } (Kl96G<Wej } uqaP\ else q[l!kC+Eh break; H pHXt78 } l$ABOtM@ } ,J|8P{ZO catch(IOException e){e.printStackTrace ();} |Co ?uv
i catch(Exception e){e.printStackTrace ();} 4ZY0!'be-R 1l$c*STK :Ogt{t Utility.log(nFileLength); 5&WYL Ccmo(W+0 }g1V6`8& return nFileLength; % #!`>S)O } Mqu>#lL Y#9dVUS
UADD 7d //保存下载信息(文件指针位置) oMH-mG7:K private void write_nPos() :J|t! ` { }%K)R5C try{ <!ewb=[_$ output = new DataOutputStream(new FileOutputStream(tmpFile)); 3jMHe~.E< output.writeInt(nStartPos.length); otQulL)T/ for(int i=0;i<nStartPos.length;i++) b5kw*h+/'h { C?v_ig // output.writeLong(nPos); [<;4$}f\ output.writeLong(fileSplitterFetch.nStartPos); '+6H= Qn output.writeLong(fileSplitterFetch.nEndPos); Z5 lE*z } _^+z2m+~N output.close(); g4(vgWOW` } ,G, '#] catch(IOException e){e.printStackTrace ();} >k gL N catch(Exception e){e.printStackTrace ();} M=Y}w? } DH(Qmd \ /(;LHWQ DYS|"tSk //读取保存的下载信息(文件指针位置) 8`e75%f:2 private void read_nPos() =+K2`=y;WF { s68&AB try{ %E\&9, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L0\97AF int nCount = input.readInt(); e;1n!_l\ nStartPos = new long[nCount]; *#O8 ^3D_c nEndPos = new long[nCount]; y:6&P6`dx for(int i=0;i<nStartPos.length;i++) N*~G ] { {U:c95#.!S nStartPos = input.readLong(); RrM C[2=
nEndPos = input.readLong(); iGG; } Y|eB;Dm1q input.close(); X2avo|6e } m&EJ@,H catch(IOException e){e.printStackTrace ();} "I"(yiKD catch(Exception e){e.printStackTrace ();} )sWC5\ } FyZp,uD E^uWlUb{ 7M~w05tPh private void processErrorCode(int nErrorCode) ?LP&VU1 { 7_,)"J2^ System.err.println("Error Code : " + nErrorCode); wB(A['k } K8,fw-S% eK%~`Y 9cJzL"yi //停止文件下载 y'ZRoakz) public void siteStop() ?nW K s { xHs8']*\ bStop = true; Z)RoFD1]C for(int i=0;i<nStartPos.length;i++) ES~ykE fileSplitterFetch.splitterStop(); Ey5E1$w%& Z:Hk'|q}I A"wor\( } iHKWz)0 } ?k$3( - //负责部分文件的抓取 PCxv_Svf **FileSplitterFetch.java }Wxu =b */ 2yYq/J package NetFox; ,j{$SuZM J|k~e,C dW3 q import java.io.*; zD>:Kj5 import java.net.*; < *
)u\A F8(6P1}E giU6f!% public class FileSplitterFetch extends Thread { ?n$;l-m[ Vz$X0C=W;H (A.%q1h String sURL; //File URL <"|BuK long nStartPos; //File Snippet Start Position }@-4*5P3 long nEndPos; //File Snippet End Position B(<;] int nThreadID; //Thread's ID 6qsT/ boolean bDownOver = false; //Downing is over JJL#Y boolean bStop = false; //Stop identical h= uv4& FileAccessI fileAccessI = null; //File Access interface OidF{I*O G813NoS o l1X&Nw1W public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException uj@rv& { ,z6&k this.sURL = sURL; MV"aO@ this.nStartPos = nStart; lNtZd?=> this.nEndPos = nEnd; n:c)R8X] nThreadID = id; a8K"Z-LlQ fileAccessI = new FileAccessI(sName,nStartPos);//定位 y993uP } 16q"A$ ]=5nC)|
Do3;-yp>` public void run() -\mbrbG9H { 3c<).aC0f while(nStartPos < nEndPos && !bStop) Y|bCbaF { :-x F=Y(; ?zwPF;L* KNtsz[#b try{ nK*$P +[R URL url = new URL(sURL); \M4/?<g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); psb$rbu7[ httpConnection.setRequestProperty("User-Agent","NetFox"); s_} 1J,Y String sProperty = "bytes="+nStartPos+"-"; ^+CTv httpConnection.setRequestProperty("RANGE",sProperty); }]cKOv2 Utility.log(sProperty); `>^2MHF3LT )L?JH?$C W (N@`^ InputStream input = httpConnection.getInputStream(); ZJz6{cY //logResponseHead(httpConnection); (;^VdiJ )M5:aSRz q5il9*)d( byte[] b = new byte[1024]; V!=1 !"}OG int nRead; $j(2M?.># while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g%1FTl { Z_&6<1,H nStartPos += fileAccessI.write(b,0,nRead); /p|]*={ //if(nThreadID == 1) 0m?v@K' l // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vw7NLTE}` } nKn,i$sO/. '+tU8 Pb n dRy&[f7 Utility.log("Thread " + nThreadID + " is over!"); n,eO6X 4 bDownOver = true; 0*?~I;.2m$ //nPos = fileAccessI.write (b,0,nRead); q=8I0E&q } yw'b^D/ catch(Exception e){e.printStackTrace ();} IZ /M d@C } y"=j[. } 1=C>S2q fDo )~t*~ Bor _Kib //打印回应的头信息 ;hsgi|Cy- public void logResponseHead(HttpURLConnection con) MrIo. { |1`|E-S= for(int i=1;;i++) M%H<F3 { 8E`rs)A String header=con.getHeaderFieldKey(i); .%>UA|[~: if(header!=null) Q8.SD p //responseHeaders.put(header,httpConnection.getHeaderField(header)); Q5'DV!0aSv Utility.log(header+" : "+con.getHeaderField(header)); 6AgevyVG else BwO^F^Pr?k break; f`@$saFD } ^`
N+mlh } XYD}OddO )]Xj"V2 V6'"J public void splitterStop() [4,=%ez { y~_wr}.CS bStop = true; o$I% 1 } &-#!]T-P:E e=KA|"vxh >
t *+FcD } kDuN3 il=y m F0
WM&{v /* A$G>D3 **FileAccess.java &CW,qY,sh *//文件访问(定位,写) ) &[S*g package NetFox; F3/aq+<P[ import java.io.*; $fSV8 n;Y Tvr2K84l OgjSyzc public class FileAccessI implements Serializable{ /5:C$ik Sw~jyUEr //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 xMI4*4y( RandomAccessFile oSavedFile; ,yW BO long nPos; D_r&B@4w hR"j[ CSx V^ public FileAccessI() throws IOException U1<EAGo| { ]v7f9MC'\ this("",0); +Ze HZjd } 'Dyt"wfo ?<c)r~9] Y9fktg. public FileAccessI(String sName,long nPos) throws IOException 8"R;axeD { \nM$qr'`B oSavedFile = new RandomAccessFile(sName,"rw"); 6jFc' this.nPos = nPos; C*kGB(H7 oSavedFile.seek(nPos); &6nOCU) } 4bD^Kc4\ 1wpT"5B 26|2r public synchronized int write(byte[] b,int nStart,int nLen) ?qwTOi { zJNiAc int n = -1; V,?i]q;5 try{ {Lu-!}\NP oSavedFile.write(b,nStart,nLen); >$h *1/ n = nLen; :JW!$?s8H } x j~/C5@ catch(IOException e) GEU:xn { 9dl\`zlA* e.printStackTrace (); iD=VNf } *Iv.W7 [ Gv(bD6Rz 1qXqQA return n; lquY_lrri } ^Nl)ocHv! *het_;)+{ qB-9&X } M^I*;{w6i J+IQvOn_| 46c7f*1l /* ,@"Z!?e **SiteInfoBean.java =qH9<,p`H */ |5|^[v package NetFox; L|4kv !HyPe"`oL 6@kKr public class SiteInfoBean { 4Eh 2sI Nx>WOb98
>&V?1!N" private String sSiteURL; //Site's URL 5`CPaJT$ private String sFilePath; //Saved File's Path yNVuSj private String sFileName; //Saved File's Name :|/bEP]p/ private int nSplitter; //Count of Splited Downloading File !l!^`c |&vQ1o|} tX)l$oRPr public SiteInfoBean() tpw0j
CVu {//nSplitter的缺省值为5 &>kklP //default value of nSplitter is 5 /MHqt=jP6 this("","","",5); csZIBi } j.O7-t%C {H
OvJ`tM yyZ}qnbx] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Bs2.$~ { F?=(4Pyvu sSiteURL= sURL; c$aTl9e sFilePath = sPath; kGhWr M sFileName = sName; udxLHs this.nSplitter = nSpiltter; J{8_4s!Xt> 0&$+ CWSM R=ddQ:W6g } P~nI6/r1 ]eA< Fhw:@@= public String getSSiteURL() P7r?rbO" { `c@KlL*!Q return sSiteURL; ^/`:o}7K7 } [OFg
(R- ~@=:I 5fi6>> public void setSSiteURL(String value) A-gNfXP,D { gNr/rp9A$m sSiteURL = value; ;}),6R } ZM"J5}h z#*M}RR >xu}eWSz public String getSFilePath() QW :-q(s { ^L}fj$
return sFilePath; O)C
y4[ } -.ITcDg b%>vhj&F >Ya+#j~CZ public void setSFilePath(String value) hU=n>g>nx { /C"dwh"`` sFilePath = value; ?CGbnXZ4Ug } F XJI,(:- Ys,}L. v{4K$o public String getSFileName() xXQ#?::m { Q:?]:i/* return sFileName; \M^L'Mkj } {`fhcEC 1GB$;0 W), krwY_$q public void setSFileName(String value) =1g { q:Gi
Qk- sFileName = value; ^44AE5TO } =KJK'1m9 w^N xR, B6~a `~" public int getNSplitter() lVY`^pw? { -+4:}
sD return nSplitter; ($:s}_<>s } dK|6p_ !J
")TP= H
<1g public void setNSplitter(int nCount) Gy0zh|me { 3Gi#WV4$ nSplitter = nCount; q:N"mp<% } u
)+;(Vd } >-rDBk
;K [f["9(: c;DWSgIw /* lot7S XvK **Utility.java m=i 8o ` */ E>~DlL% package NetFox; [FLRrTcE cy|]}n85 Nzj7e 1= public class Utility { [Lh<k+ @dE|UZ=( 9d{iq"*R public Utility() %RA8M-
d { N@J "~9T }.O,P'k [eL?O;@BD } 0eq="|n^| O~yPe. //线程睡眠 +=#sam*i public static void sleep(int nSecond) [*zB
vj}G { HFYN(nz}[ try{ qPsf`nI7 Thread.sleep(nSecond); vfAR^*7e } Arh0m. w catch(Exception e) ],ioY*4G { @8X)hpHf e.printStackTrace (); ^t4T8ejn } -U;2
b_ } uPbvN[~t Ut4cli&cC //日志 VS0
&[bl public static void log(String sMsg) l6ayV { NT?Gl( System.err.println(sMsg); 7J$ } M\zM-B 5]yQMY\2) v^2q\A-? public static void log(int sMsg) c6gRXp'ID { 1HYrJb,d System.err.println(sMsg); :f (UZmV$ } xab1`~%K } 6J[ {?, (+}H
ih !mhV$2&r /* ; V)pXLE **TestMethod.java ]pi"M3f_ */ n'a=@/ package NetFox; JK:i- Lqy]bnY ?EF[OyE public class TestMethod { M]&F1< Xy[O ) jBPt& public TestMethod() K?0f)@\nx { ///xx/weblogic60b2_win.exe "<6X=|C try{ #DjSS.iW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); M qq/k J //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); b4%sOn, SiteFileFetch fileFetch = new SiteFileFetch(bean); u*:B 9E fileFetch.start(); xgV.<^ } Htd-E^/ catch(Exception e){e.printStackTrace ();} KhK:%1po Gkci_A* sd|5oz) } kj_o I5<' =`fJ -_&"Q4FR;+ public static void main(String[] args) 5, { }gw
\w?/ new TestMethod(); k?-GI[@X } WK;X6` } ?v8.3EE1\o 点击下载更多相关资料
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