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/* Qw"%Xk **SiteFileFetch.java \J;]g\&I" */ l&mY}k package NetFox; v0bP|h[t import java.io.*; HV]u9nrt# import java.net.*; 9Sa6v?sRor xK5~9StP 7xO~v23oe public class SiteFileFetch extends Thread { 7&w[h4Lw n;:C{5 a1Q W0d SiteInfoBean siteInfoBean = null; //文件信息Bean g@>93j=cZU long[] nStartPos; //开始位置 myd:"u,}9 long[] nEndPos; //结束位置 0bSnD|#I FileSplitterFetch[] fileSplitterFetch; //子线程对象 rd=+[:7L long nFileLength; //文件长度 Gq%,'amf boolean bFirst = true; //是否第一次取文件 /#q6.du boolean bStop = false; //停止标志 FJ{&R Ld File tmpFile; //文件下载的临时信息 hx4c`fOs DataOutputStream output; //输出到文件的输出流 I SdB5Va Im]6-#(9\| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @~&^1%37) public SiteFileFetch(SiteInfoBean bean) throws IOException EN8xn9M? { D^U?!S&4~ siteInfoBean = bean; fhC| =0XB //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8KKhD$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); k 6i&NG6 if(tmpFile.exists ()) Jc` tOp5 { x0%@u^BF bFirst = false; 5{v uN)K3 read_nPos(); 0h{&k7T<7 } GNHW bC6_m else |8)\8b|VuC { IP)%y%ycw nStartPos = new long[bean.getNSplitter()]; {K:]dO nEndPos = new long[bean.getNSplitter()]; F%O+w;J4 } 6*
0vUy*" H!l9a 9;L8%T
( K<5 0>uG } r8[)C cv XK)0Mt\ k[@/N+;")` public void run() ~]'yUd1gSZ { gg Nvm //获得文件长度
*D1vla8 //分割文件 1(e64w@ //实例FileSplitterFetch L@ejFXQg //启动FileSplitterFetch线程 \Xr*1DI< //等待子线程返回 jx
?"`;a try{ b&AeIU}&
if(bFirst) VssWtL { K}'?#a(aX= nFileLength = getFileSize(); Y.#fpG' if(nFileLength == -1) 10bv%ZX7 { ktp<o.f[ System.err.println("File Length is not known!"); 8PWEQ<ev7> } HK%W7i/k@ else if(nFileLength == -2) g0-rQA { )l`VE_(| System.err.println("File is not access!"); /a6i` } 2@I0p\a else #u +~ ^M { HuQdQ*Q for(int i=0;i<nStartPos.length;i++) ?0qP6'nWx { \m:('^\6o nStartPos = (long)(i*(nFileLength/nStartPos.length)); . lNf.x#u } WF2t{<]^e for(int i=0;i<nEndPos.length-1;i++) Dt iM}=: { 0]^gT' nEndPos = nStartPos[i+1]; o%0To{MAF- } oa`7ClzD nEndPos[nEndPos.length-1] = nFileLength; ~@T`0W-Py } i)$<j!L } Wv~&Qh}
b #Llu$ Lg|d[*;'7 //启动子线程 /w2-Pgm-[\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; o8NRu7@? for(int i=0;i<nStartPos.length;i++) 9n"MNedqH { )CgH|z:=b fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), imKMPO= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <Pi#-r., nStartPos,nEndPos,i); .1_kRy2*. Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \^jRMIM== fileSplitterFetch.start(); wyXQP+9G } @rF|WT // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~=|QPO(d siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J93xxj // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", t 6lwKK nEndPos = " + nFileLength); x0) WrDb // fileSplitterFetch[nPos.length-1].start(); r\)bN4-g cmU>A721 K_!:oe7% //等待子线程结束 }<*KM)% //int count = 0; tf[)| /M //是否结束while循环 3Vak
C boolean breakWhile = false; QX-n l~ ru4M=D b`F]oQ_* while(!bStop) pbw{EzM { {-%8RSK=< write_nPos(); _rmKvSD% Utility.sleep(500); RaP,dR+P breakWhile = true; Ys&)5j- ;k,@^f8 :+ "H h% for(int i=0;i<nStartPos.length;i++) 2 gR*] ?C* { 1+YqdDqQ if(!fileSplitterFetch.bDownOver) ydAiH*> { `PSjkF( breakWhile = false; 2<n@%'OQp break; aPQxpK? } g!9|1z } l[rK)PM if(breakWhile) I0!]J{ break; <1
;pyw
y e+MQmWA'F yrd1J$ //count++; C7DwA/$D //if(count>4) <XN=v!2; // siteStop(); ]'-y-kqY } n7yp6Db IDL0!cF ml /S|`Drk System.err.println("文件下载结束!"); HxcL3Bh$~} } ,]]*}4[r catch(Exception e){e.printStackTrace ();} K9y~
e } 1Kd6tnX &HtTh { o"_'cNAz //获得文件长度 W|y;Kxy public long getFileSize() 5pK
_-:? { 0G0(g,3p int nFileLength = -1; Rd|8=`) try{ OHrzN'] URL url = new URL(siteInfoBean.getSSiteURL()); z,4 D'F& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); oR/_{#Mz" httpConnection.setRequestProperty("User-Agent","NetFox"); \ Ce*5h }}D32TVN wm_rU] int responseCode=httpConnection.getResponseCode(); tw&v@HUP if(responseCode>=400) 5$+ssR_?k { F\|4zM processErrorCode(responseCode); =%7s0l3z return -2; //-2 represent access is error b6p'%;Y/ } , 2xv N"suR}9% Aa4Tq2G String sHeader; ,>8w|951' )^+hm+27v e<[ ] W4"A for(int i=1;;i++) 1hE{(onI { N_Kdi%q //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); z?( b|v //Utility.log(in.readLine()); x0:BxRx* sHeader=httpConnection.getHeaderFieldKey(i); 5t"FNL
<(M if(sHeader!=null) DfP-(Lm) { c&FOt if(sHeader.equals("Content-Length")) !a-B=pn!] { aB?usVoS nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); aT(_c/t. break; #sDb611}# } qmt9J?$k } v(!:HK0oeT else YRFz] break; B?- poB& } -
l^3>!MAM } 6bLn8UT catch(IOException e){e.printStackTrace ();}
qLP/z catch(Exception e){e.printStackTrace ();} rNTLP
m
Dad$_% 0bT[05. Utility.log(nFileLength); KIag(!& o. ;Vrc ^_<|~ return nFileLength; i7e6l C } Y#tur`N 7CvBE;i TEMxjowr //保存下载信息(文件指针位置) FROC/' private void write_nPos() >%0$AW|Exu { K,$rG%czX try{ n|LpM . output = new DataOutputStream(new FileOutputStream(tmpFile)); A`ajsZ{q, output.writeInt(nStartPos.length); -]H~D4ng for(int i=0;i<nStartPos.length;i++) " aCAA#$J { 7B (%2 // output.writeLong(nPos); x+pf@?w output.writeLong(fileSplitterFetch.nStartPos); 2\QsF,@`YU output.writeLong(fileSplitterFetch.nEndPos); Dfa3#{ } ?%}!_F`h% output.close(); 0GXY2+p}S } .V?[<}OJn catch(IOException e){e.printStackTrace ();} 8/BMFRJ catch(Exception e){e.printStackTrace ();} lM{f ld } xZlCFu (6Z^0GL +E_yEH7_) //读取保存的下载信息(文件指针位置) |E.BGdS private void read_nPos() [nP s { 5<R m{ try{ [!-gb+L DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); V?1 $H int nCount = input.readInt(); 1/2cb-V nStartPos = new long[nCount]; Z>Mv$F"p: nEndPos = new long[nCount]; cgSN:$p(R for(int i=0;i<nStartPos.length;i++) _Uq' N0U { <.B+&3') nStartPos = input.readLong(); $[n:IDa*@1 nEndPos = input.readLong(); }$4z$& } >[,eK= input.close(); v|o{AL:ei } ~~Ezt*lH catch(IOException e){e.printStackTrace ();} ]MosiMJF catch(Exception e){e.printStackTrace ();} h0@a"DqK } %.<_+V#h W%-XN mV$ebFco0 private void processErrorCode(int nErrorCode) PD-&(ka. { -6HwGfU System.err.println("Error Code : " + nErrorCode); }:
HG)V } .'gm2 '=n?^EPE3 4^F%bXJ) //停止文件下载 Oo}h:3? public void siteStop() pB8D { /uj^w&l# bStop = true; *}d N.IL, for(int i=0;i<nStartPos.length;i++) J-5>+E,nZ fileSplitterFetch.splitterStop(); 8Auek#[ !}#> ky!t yJq< &g } y]m:
{ } @wI>0B //负责部分文件的抓取 ExS5RV@v' **FileSplitterFetch.java JfIXv */ MK=oGzK package NetFox; _9
]:0bDUo Y \-W` ~\jP+[>M' import java.io.*; \7r0]& _ import java.net.*; Wye* ~t !m+Pd.4TaB >|E]??v public class FileSplitterFetch extends Thread { 5M0Q'"`F: A51
a/p# zVq!M-e String sURL; //File URL f
+{=##'0 long nStartPos; //File Snippet Start Position gwRB6m$ long nEndPos; //File Snippet End Position q"u, Tnc; int nThreadID; //Thread's ID A iM ukd, boolean bDownOver = false; //Downing is over i}sAF/ boolean bStop = false; //Stop identical fY[Fwjj3 FileAccessI fileAccessI = null; //File Access interface 1^![8>u" ^w60AqR8 oLT#'42+H public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException L7-BuW}& { 1
:p' this.sURL = sURL; h*k V@Dc this.nStartPos = nStart; oS fr5
i this.nEndPos = nEnd; d_@
E4i nThreadID = id; Sfz1p fileAccessI = new FileAccessI(sName,nStartPos);//定位 J rx^ } )8@- j Q5 F} mH&7{2r public void run() r ;RYGLx { AG@gOm while(nStartPos < nEndPos && !bStop) c>_ti+ { Hd|[>4 Z <l{oE?N k&ci5MpN try{ ES~b f URL url = new URL(sURL); rexv)!J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d_yvG.#C httpConnection.setRequestProperty("User-Agent","NetFox"); aDF@AS String sProperty = "bytes="+nStartPos+"-"; @:C)^f" httpConnection.setRequestProperty("RANGE",sProperty); :>0ywg Utility.log(sProperty); Lq2Q:w' e= IdqkJ% $[>{s9E InputStream input = httpConnection.getInputStream(); &<VU}c^! //logResponseHead(httpConnection); |LZ;2 i eiKY az 'Qy6m'esW byte[] b = new byte[1024]; j=l2\W#} int nRead; |nefg0`rk while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Vp/XVyL}R { i%K6<1R;y{ nStartPos += fileAccessI.write(b,0,nRead); 3^7+fxYWo //if(nThreadID == 1) oMQ4q{&| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z1J)./BO } >1j#XA8 1=R$ RI 9zwD%3Ufn Utility.log("Thread " + nThreadID + " is over!"); 4X+xh|R:U bDownOver = true; TEz;:* ,CG //nPos = fileAccessI.write (b,0,nRead); atTR6%!6 } L 4j#0I]lq catch(Exception e){e.printStackTrace ();} "cKD# } 3W?7hh } 8RMM97@1Q r3'J{-kl v`A)GnNiN //打印回应的头信息 |OH*c3~r public void logResponseHead(HttpURLConnection con) rmX*s}B { Hd~g\ for(int i=1;;i++) /mkT7,] { a{kJ`fK String header=con.getHeaderFieldKey(i); wQ+pVu?6_ if(header!=null) .-Lrrk)R+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); |Ea%nghl Utility.log(header+" : "+con.getHeaderField(header)); Bl b#h else \l GD8@,x break; ^Arv6kD, } `MI\/oM@ } tbS hSbj Cn~VJ,l
g J@5iD public void splitterStop() 4 Ej->T. { TKB8%/_p bStop = true; !85bpQ. } b Hr^_ogN IuXgxR% c]4X`3] } $${I[2R) dc)%5fV\ g *Js4 /* Cbff:IP **FileAccess.java oco,sxT *//文件访问(定位,写) z!g$#hmL> package NetFox; \s)MNs import java.io.*; pJHdY)Cz UIAazDyC X:i?gRy" public class FileAccessI implements Serializable{ cW%)C.M [G}dPXD //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 wn[)/*(,$( RandomAccessFile oSavedFile; L$PbC!1 long nPos; `+,?%W) L`nW&;w' 5A0]+)5E8 public FileAccessI() throws IOException j\ y! { 0AO^d[v this("",0); /8l-@P.o } +=($mcw#[ "'v+*H 3 s<YN*~ public FileAccessI(String sName,long nPos) throws IOException Lf9hOMHx { Ey=2zo^F oSavedFile = new RandomAccessFile(sName,"rw"); f;'*(( this.nPos = nPos; *u+DAg'& oSavedFile.seek(nPos); |Hf|N$ } lh;fqn` K#OL/2^
5 FyEKqYl public synchronized int write(byte[] b,int nStart,int nLen) 1/-3m Po { %0Ur3 int n = -1; &~_F2]oM try{ -}6ew@GE oSavedFile.write(b,nStart,nLen); IW\^-LI. n = nLen; _[6sr7H! } 3 yx[*'e$ catch(IOException e) ljbAfd { 1V2]@VQF e.printStackTrace (); |=q~X}DA } M(C">L]8 );!ND% \TP$2i%W return n; Q:P)g#suc } tD.#*.7 QM(xMq
38w^="-T } lj<Sa p-s\D_ xa)p, /* =;Q/bD-> **SiteInfoBean.java $z$^
yjL */ $@Vn+|
Ix package NetFox; cSPQ
NYU: FJ0I&FyWs Jr5S8c|" public class SiteInfoBean { 9QU\J0c/ : #a ZxtO.U2 private String sSiteURL; //Site's URL v< P0f"GH private String sFilePath; //Saved File's Path ta?NO{* private String sFileName; //Saved File's Name `4K|L6 private int nSplitter; //Count of Splited Downloading File F~Dof({: GQ1/pys e=&~6bs1U public SiteInfoBean() ~xqiasE#K {//nSplitter的缺省值为5 &PJ;B)b //default value of nSplitter is 5 !.UE} ^TV this("","","",5); $`lWW6>P } W` x.qumN ,7wYa& xKu#OH public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) znrO~OK { {F<0e^* sSiteURL= sURL; ZLzc\>QX sFilePath = sPath; D&FDPaJM sFileName = sName; n3p@duC4 this.nSplitter = nSpiltter; )%^l+w+& h\!8*e;RAW G' U_I } 6/<Hx@r ( 0d+n[Go+S f&CQn.K" public String getSSiteURL() O[d#-0s { gY7sf1\wX return sSiteURL; EK# 11@0% } Phi5;U! QD7KE6KP' 4`8s]X public void setSSiteURL(String value) M0$MK> { %np(z&@wi sSiteURL = value; WK$\#>T } 3VLwY!2: ?kR1T0lKkE NFTv4$5d public String getSFilePath() WVR/0l&bU { a{xJ#_/6 return sFilePath; qy'-'UlIr } {dxFd-K3 tMw65Xei6b U5C]zswL public void setSFilePath(String value) ,\i*vJ#f { ~Eg]Auk7 sFilePath = value; E_~e/y"- } CT'4. XYvj3+
anSZWQ public String getSFileName() __b4dv { 6rnFXZ\ return sFileName; M d4Q.8 } ?EC\.{ '1D$ ; 1 3]e< ' public void setSFileName(String value) *IOrv) { X|\`\[ sFileName = value; :;_}Gxx } B& @ pZYl @RPQ1da AZ(zM.y!#_ public int getNSplitter() BI%^7\HZ { {#kCqjWG return nSplitter; I3 "6" } z]9t 5I s'yR2JYv 2Vti|@JYp public void setNSplitter(int nCount) /k/X[/WO { m}z6Bbis 0 nSplitter = nCount; -F?97&G$ } q;[HUyY, } a]*{!V{$i x_~_/&X5 z6)N![X /* UJ,vE}=_{ **Utility.java oaQW~R`_ */ f+9WGNpw package NetFox; E"'u2jEG^ -Kg.w*\H7/ #M~yt`R~ public class Utility { +\ftSm> s=:)!M.i -r,v3n public Utility() [s$x"Ex { ?;oJ=.T MB;rxUbhe3 B>1,I'/$. } (W#CDw<ja FaCW +9B //线程睡眠 07Yak<+~ public static void sleep(int nSecond) w)|9iL8 { pfZ[YC- try{ ]A }ZaXd Thread.sleep(nSecond); '4M{Xn}@ } m!KEK\5M? catch(Exception e) NxF:s,a6 { g$NUu e.printStackTrace (); x:0swZ5Z } AM=> P7 } d;<'28A F5X9)9S //日志 :
jkO public static void log(String sMsg) G>"n6v'^d { OCu_v%G0 System.err.println(sMsg); gbYM1guiD } FS5iUH+5 =~J VU
2OpA1$n6 public static void log(int sMsg) x"sbm { D7nK"]HG;l System.err.println(sMsg); a&0g0n6 } pq
r_{ } cBqbbZyUk /:]<z6R U\Y0v.11 /* L+G0/G}O\ **TestMethod.java I(AlRh */ ZxSnqbyA* package NetFox;
QDW,e]A SW%}S*h 5 eL
b/,R public class TestMethod { Y2tVq})! #/ePpSyD c*B< -
l<5 public TestMethod() mS[``$Z\! { ///xx/weblogic60b2_win.exe #lMcAYH, try{ Q9AvNj>X SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x2t&Wpvt //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); sN8pwRj b SiteFileFetch fileFetch = new SiteFileFetch(bean); ##BbR fileFetch.start(); DN)o|p } wbJBGT{sm catch(Exception e){e.printStackTrace ();} `Y.~eE &lU\9 q#AIN`H
} 9]Ue%%vM h STcL:b
;o'r@4^&$R public static void main(String[] args) CyLwCS{V\ { d+G%\qpzQ new TestMethod(); @:RoY vk$ } Dqo#+_v } h2x9LPLBxT 点击下载更多相关资料
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