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/* ^U*1_|Jh **SiteFileFetch.java S{)K_x */ )lz)h*%# package NetFox;
x|c_( import java.io.*; Hj `\Fm*A import java.net.*; cdGBo4
V_e RU/SJ1wM" public class SiteFileFetch extends Thread { ]Nssn\X7 >Y\?v-^~; OwNo$b]h` SiteInfoBean siteInfoBean = null; //文件信息Bean @.)[U:N long[] nStartPos; //开始位置 o!&+ _BKw long[] nEndPos; //结束位置 Vo.~1^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 fo~*Bp()-E long nFileLength; //文件长度 WCk. K boolean bFirst = true; //是否第一次取文件 C1l'< boolean bStop = false; //停止标志 \"L0d1DK) File tmpFile; //文件下载的临时信息 +T4}wm DataOutputStream output; //输出到文件的输出流 Q`;eI
a6U OZz!8-|wE //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^B}q@/KV public SiteFileFetch(SiteInfoBean bean) throws IOException %<p/s;eu { 5eyB\>k, siteInfoBean = bean; @J qo'\~& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); M0?%r` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ly_8p63- if(tmpFile.exists ()) @CxgoX^ { s +qodb+ bFirst = false; 0r i read_nPos(); 8<ev5af } yc`3) else (c"!&&S^ = { q
\fyp\z nStartPos = new long[bean.getNSplitter()]; =[Z3]#h nEndPos = new long[bean.getNSplitter()]; y!rJ}e } darbL_1 w8: 5'V-Ly)*% ^
uwth } <Ter\o5% 9x8Vsd %BT]h3dcSS public void run() u~JR]T {
^^n (s_g //获得文件长度 u
i$4 //分割文件 Bu?Qyz2O //实例FileSplitterFetch E'6/@xM //启动FileSplitterFetch线程 {.;qz4d` //等待子线程返回 hM>.xr try{ 8TU(5:xJo if(bFirst) %~>-nqS { E`C!q
X> nFileLength = getFileSize(); w-NTw2x,& if(nFileLength == -1) Tdz#,]Q { knpdECq&k System.err.println("File Length is not known!"); "3a}~J<g } ?|
6sTu! else if(nFileLength == -2) :>_oOn[ _ { *DZ7,$LQ~D System.err.println("File is not access!"); [7LdTY"Tl } D,lY_6= else &h!O<'*2 { 4}UJBb? for(int i=0;i<nStartPos.length;i++) F0r2=f(? { Zw'050~- nStartPos = (long)(i*(nFileLength/nStartPos.length)); agkKm?xIL } "Y4glomR[ for(int i=0;i<nEndPos.length-1;i++) Z#^|h0 { [gZR}E nEndPos = nStartPos[i+1]; gh
:5 } JR&yaOws nEndPos[nEndPos.length-1] = nFileLength; &"27U } _V0%JE' } Ho[]03 :V@)A/}uk hsYE&Np_Q //启动子线程 FgrVXb_q fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Je2&7uR0 for(int i=0;i<nStartPos.length;i++) XJy.xI>; { 0_Elxc fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /iAhGY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Tow! 5VAM nStartPos,nEndPos,i); gSj0+| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B%kC>J fileSplitterFetch.start(); `
vFD O$K } 02NVdpo[wU // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4sBvW siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); guf*>qNr // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )^"V}z
t nEndPos = " + nFileLength); K)+]as // fileSplitterFetch[nPos.length-1].start(); 2+C:Em0yI ;4GGXT++L 0M&~;`W} //等待子线程结束 19pFNg'kA //int count = 0; gN73)uJ0 //是否结束while循环 D`'Cnt/ boolean breakWhile = false; kUT^o ~Cg7 PX2b(fR8_O while(!bStop) iWFtb)3B { h+Yd
\k write_nPos(); `_i|\}tl Utility.sleep(500); 5ug|crX breakWhile = true; j(K)CHH FUJ<gqL rwio>4= for(int i=0;i<nStartPos.length;i++) L%<]gJtrO { ZJF+./vN if(!fileSplitterFetch.bDownOver) `g) { B*Om\I breakWhile = false; H Vhd#Q; break; UugR } K=}Eupn= } v&d'ABeT if(breakWhile) f1elzANy break; :PY6J}: 1CSGG'J]E [u^ fy<jdp //count++; {.[EX MX //if(count>4) G-K{ // siteStop(); mh`uvqY } ur=:Ha mW+5I-~ 0 z]H= System.err.println("文件下载结束!"); JP5en } _8F;-7Sz catch(Exception e){e.printStackTrace ();} C]l)Pz$ } bmi",UZ:F nm]lPK U+Y sDTw</@ //获得文件长度 aJF/y3 public long getFileSize() ~ qaT
jSP { I&gd"F _v} int nFileLength = -1; b!Nr try{ 1LhZmv URL url = new URL(siteInfoBean.getSSiteURL()); h(J$-SUs HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C&%NO;Ole httpConnection.setRequestProperty("User-Agent","NetFox"); gyV`]uqG }bdoJ5 9V&+xbR& int responseCode=httpConnection.getResponseCode(); [wiB1{/Ls. if(responseCode>=400) 6A|XB3 { yGrnzB6| processErrorCode(responseCode); quC$<Y return -2; //-2 represent access is error 1@|%{c&+9 }
?*r%*CL ZU`~@.`i `
"-P g5 String sHeader; 4GeN<9~YS r$'.$k\ ]@Z
nP,8 for(int i=1;;i++) ,O:p`"3`0= { 1ah,Zth2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,Shzew+ //Utility.log(in.readLine()); m|x_++3 sHeader=httpConnection.getHeaderFieldKey(i); :hW(2=% if(sHeader!=null) {Oq8A.daJ { Ruq>+ }4 if(sHeader.equals("Content-Length")) MU2kA&LH { N;BuBm5K nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1>Vq<z break; v6Y[_1 } rz-61A) _ } Z(tO]tQE else 0aI@m break; <Kr`R+Q$DN } NZADHO@0 } .f. tPm catch(IOException e){e.printStackTrace ();} nN@
Ch catch(Exception e){e.printStackTrace ();} E_[a|N"D ' S,g3 gzH;`, Utility.log(nFileLength); * a1q M? @JLN3 }NGP! return nFileLength; hNkv lk'Ui } PVdN)tG5 "oFi+']* .
.S3-(xW //保存下载信息(文件指针位置) 3
Fy CD4# private void write_nPos() H.C*IL9 { ]q[(z try{ gW4fwE^ output = new DataOutputStream(new FileOutputStream(tmpFile)); l,(:~KH| output.writeInt(nStartPos.length); 4}cxSl]jf! for(int i=0;i<nStartPos.length;i++) nnE'zk<" { V=5*)i/ // output.writeLong(nPos); I8B0@ZtV output.writeLong(fileSplitterFetch.nStartPos); _h,_HW)G output.writeLong(fileSplitterFetch.nEndPos); K"5q387! } 61&{I>~1 output.close(); 7IkEud } +oO7UWs>6 catch(IOException e){e.printStackTrace ();} $]}K ; catch(Exception e){e.printStackTrace ();} ;#IrHR*Bk } K7(k_4 Jg{K!P|i Y"KJ`Rx //读取保存的下载信息(文件指针位置) W?P4oKsql* private void read_nPos() 4${3e
Sg_ { _5(p=Zc try{ wL>*WLfR DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #2:?N8vz* int nCount = input.readInt(); Lp@Al#X55 nStartPos = new long[nCount]; 5WxNH}{ nEndPos = new long[nCount]; (a-Lx2 T for(int i=0;i<nStartPos.length;i++) qp#Euq6 { O0`ofFN nStartPos = input.readLong(); AFvv+
ss nEndPos = input.readLong(); 77aUuP7Iw } n_LK8 input.close(); TvT>UBqj= } ZU.E}Rn: catch(IOException e){e.printStackTrace ();} Bz>f catch(Exception e){e.printStackTrace ();} qvGmJN0 } COw!a\Jl 0Bkz)4R
'Z9UqEGV private void processErrorCode(int nErrorCode) a MFUj+^ { tQUKw@@Q System.err.println("Error Code : " + nErrorCode); upZc~k!1\ } *&_cp]3-WF 5=p<"*zJ *3@8,~_tp //停止文件下载 O\Z!7UQ$ public void siteStop() L>E{~yh { B^zg#x#8 bStop = true; Lyn{Uag for(int i=0;i<nStartPos.length;i++) ;~[}B v fileSplitterFetch.splitterStop(); Z02EE-A xw_$1
S SK@ p0: } F:jtzy" } 9xw"NcL //负责部分文件的抓取 dBovcc **FileSplitterFetch.java H_x}- */ V:P]Ved package NetFox; ;qbK[3. A:z 52Dgul import java.io.*; 5A|dhw import java.net.*; #Hu##x|
z-g6d ( ;1nXJ{jKw public class FileSplitterFetch extends Thread { +|pYu<OY gae=+@z 5T( cy String sURL; //File URL ZPq.|6& long nStartPos; //File Snippet Start Position gV\Y>y4v long nEndPos; //File Snippet End Position ZfVY:U:o> int nThreadID; //Thread's ID Ik5V? boolean bDownOver = false; //Downing is over ohJDu{V boolean bStop = false; //Stop identical c{?SFwgd FileAccessI fileAccessI = null; //File Access interface ,C0y3pL 6w
m-uu S<'_{u z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Q2woCxB { Lpkx$QZ this.sURL = sURL; #;@I. this.nStartPos = nStart; a$^)~2U{ this.nEndPos = nEnd; R~[~(`/S nThreadID = id; 2Kr>93O fileAccessI = new FileAccessI(sName,nStartPos);//定位 }opMf6`w } HUCJA-OZGL >py[g0J o~"Y_dLsW public void run() 5_L,7\5# { vZ$E
[EG} while(nStartPos < nEndPos && !bStop) FyPG5- { qIQ
61>< VQG$$McJ VSV]6$~H try{ YPY,gR URL url = new URL(sURL); ]$^HGmP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ME]89 T& httpConnection.setRequestProperty("User-Agent","NetFox"); 98?O[= String sProperty = "bytes="+nStartPos+"-"; -J#RGB{7 httpConnection.setRequestProperty("RANGE",sProperty); Y TY(Et1i Utility.log(sProperty); Yhm veV >g~IP> ^P]5@d v InputStream input = httpConnection.getInputStream(); pBv,,d` //logResponseHead(httpConnection); }oSgx N$C+le h# Z,ud_ byte[] b = new byte[1024]; }m5()@Q}a int nRead; P{_%p<:V while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) M3F1O6=4j { K[/L!.Ag nStartPos += fileAccessI.write(b,0,nRead); :?FHqfN?_ //if(nThreadID == 1) &N6[*7 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /]-yZ0hX0O } :Mh\;e ;PU'"MeB " _FcTY5."S Utility.log("Thread " + nThreadID + " is over!"); UHU ,zgM bDownOver = true; ZUS5z+o //nPos = fileAccessI.write (b,0,nRead); xaoR\H } (&r`
l&0 catch(Exception e){e.printStackTrace ();} [UC_ } W(4$.uZ) } g.%} +5 s3Zt)xQ3 v#<{Y'K //打印回应的头信息 xVX:kDX public void logResponseHead(HttpURLConnection con) 7I&o {
dtfOFag4_ for(int i=1;;i++) IO=$+c { $_TS]~y4} String header=con.getHeaderFieldKey(i); UF }[%Sa if(header!=null) =2QP7W3mg< //responseHeaders.put(header,httpConnection.getHeaderField(header)); :&'jh/vRN Utility.log(header+" : "+con.getHeaderField(header)); 9y5JV3 else RjO0*$>h break; =_m3~=Z } }BL7P-km } cZ)mp`^n7 &nI>`Q' Qo^(r$BD public void splitterStop() I_Gz~ qk6 { !~R<Il|B bStop = true; !.t D.(XP } 74:~F)BP rKFnivGT $M!iQ"bb } BKb#\(95* $U9]v5 q+*\'H> /* P6La)U`VA **FileAccess.java xfI0P0+ *//文件访问(定位,写) yE,qLiH package NetFox; ,c?(
|tF import java.io.*; $ xHtI]T ^E8qI8s LW.j)wB] public class FileAccessI implements Serializable{ \)o.Y
zAo@ X/vyb^:U //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $\/^O94-l RandomAccessFile oSavedFile; JN` $Fq+ long nPos; HQ7g0:-^a> K*b* ]hf{ l:JVt`A4? public FileAccessI() throws IOException ;fW~Gb?" { yTK3eK this("",0); cqJXZ.XC } {I$iD hwL`9.w Z2})n
- public FileAccessI(String sName,long nPos) throws IOException [XDV-6KCE. { ">3t+A oSavedFile = new RandomAccessFile(sName,"rw"); ZS(%!+ M this.nPos = nPos; +lVA$]d oSavedFile.seek(nPos); 'xG J;pY } !5?_) _Z9d.- .s,04xW\ public synchronized int write(byte[] b,int nStart,int nLen) _xm<zy{`S { }d>.Nj#zh int n = -1; QKq4kAaJ! try{ |%ZJN{!R oSavedFile.write(b,nStart,nLen); :3D6OBkB n = nLen; &QW&K } _6r[msH" catch(IOException e) 9s[ { 0!ZaR6 e.printStackTrace (); &p_iAMn:9 } n^l*oEl 4uMMf N"G\H<n return n; w2X HY>6]; } z[<Na3] Bt,'g*Cs js Z"T } RN[x\" , lMu-,Z=" ,tg]Gt /* $MwBt **SiteInfoBean.java \<T7EV. */ H?Q--pG8 package NetFox; hE`d@ !z4I-a sZr \mQ~ public class SiteInfoBean { }[UH1+`L K\;4;6g 7.ein:M|CB private String sSiteURL; //Site's URL V59!}kel1% private String sFilePath; //Saved File's Path Db*b"/] private String sFileName; //Saved File's Name Y,}h{*9Kd private int nSplitter; //Count of Splited Downloading File A- Abj' R13k2jLSQ JeNX5bXW public SiteInfoBean() % 33O)<? {//nSplitter的缺省值为5 pt3)yj&XE //default value of nSplitter is 5 DeNWh2 this("","","",5); [f lK } $/g`{OI]K a.gMH
uL KA{QGaZ/ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $b{8$<;9 { JU5,\3Lz# sSiteURL= sURL;
uM\\(g} sFilePath = sPath; LA59O@r sFileName = sName; cl]W]^q-Cx this.nSplitter = nSpiltter;
%r.C9 |;)_-=L0P >yn]h4M } lt:&lIW,3 c!wRq4 JBJ?|}5k4c public String getSSiteURL() u?MhK#Mr { Hf_
pe return sSiteURL; C6a- } 85[
7lO)[ ~Y*.cGA Ank_;jo public void setSSiteURL(String value) dz/fSA { Cu24xP` sSiteURL = value; {fl[BX]kZ } LK*9`dzv=G `fX\pOk~e g4Dck4^!4 public String getSFilePath() 2W_[|.;' { BCz4
s{F return sFilePath; _ eBNbO_J } JLo E)\Mi R[v<mo[s L&:A59)1k public void setSFilePath(String value) Vraz}JV { DO*6gzW sFilePath = value; ^/%Y]d$ } W|rAn2H *dBmb w%)RX<h dI public String getSFileName() PyHL`PZZ { V/"RCqY4 return sFileName; ;Wk3>\nT- } 6]<yR>
' +`Nu0y!rj C\BKdx5; public void setSFileName(String value) #<m2Xo?d] { h;r^9g sFileName = value; G,Eh8HboK } F^!O\8PFd l?J[K g +gcH public int getNSplitter() OiZ-y7;k^ { '@#(jY0_ return nSplitter; ~-lUS0duh } )c9Xp: e<`?$tZ3
>Jn` RsuV public void setNSplitter(int nCount) lnjs{`^ { "10\y{`v^ nSplitter = nCount; )AdwA+-x } UCj+V@{ } s Iaehe'B >Sk%78={R ,d_rK\J /* G@jx&#v **Utility.java 4Jc~I */ Bt$,=k package NetFox; _<c}iZv@ .:Wp9M `<<9A\Y-f public class Utility { >>C
S8 zlQBBm;fE 3%o}3.P,:@ public Utility() Lp|n)29+du { y,n.(?!* -OD&x%L*{3 `#`C.:/n } ..'"kX:5 eA
Fp<2g //线程睡眠 x]%,?Vd? public static void sleep(int nSecond) Gkfzb>_V] { ~/aCzx~ try{ Oz]$zRu/0 Thread.sleep(nSecond); +CSR! } M($GZ~ b%A catch(Exception e) v6uRzFw
{ 0ZI}eZA j e.printStackTrace (); zYdieE\- } ,`a8@ } Em{;l:;(W W}zq9|p //日志 3bo
[34 public static void log(String sMsg) jll|y0 { ;KmrBNF System.err.println(sMsg); (0_zp`) } |{ZdAr.; x*TJYST k_?OEkgUh public static void log(int sMsg) | lzcyz { a[}?!G-Wt| System.err.println(sMsg); +`B^D } En&gI`3n } eBmHb\ RK$( pTTM(Hrx /* 7aPA+gA/ **TestMethod.java :h3U^ */ {o*$|4q4 package NetFox; >MRuoJ `}$bJCSF.n Jx`7W1%T public class TestMethod { +eLL)uk L
9cXgd mC0Dj O public TestMethod() w6Mv%ZO_ { ///xx/weblogic60b2_win.exe *a{WJbau] try{ /!p}H'jl SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f;,*P,K //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :1gpbfW SiteFileFetch fileFetch = new SiteFileFetch(bean); fWs*u[S fileFetch.start(); Q4]Od{[ } N$:-q'hX catch(Exception e){e.printStackTrace ();} JlRNJ#h> swJQwY Y;g\ @j } =kK%,Mr '`W6U]7> dShGIH? public static void main(String[] args) D,=#SBJ :Z { UFj!7gX ] new TestMethod(); DeT$4c*:[ } ,TB$D]u8 } {/aHZ<I&^h 点击下载更多相关资料
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