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/* BMU#pK;P] **SiteFileFetch.java ZGd7e.u= */ )Z:maz package NetFox; OtT*)8*c import java.io.*; aMgg[g9>t import java.net.*; eQ#"-i LXc;`] R~dWblv public class SiteFileFetch extends Thread { EiA_9%< 1eS@ihkP Q#4OgNt SiteInfoBean siteInfoBean = null; //文件信息Bean qyBo|AQ5 long[] nStartPos; //开始位置 *^\u%Ir" long[] nEndPos; //结束位置 w*4sT+
P FileSplitterFetch[] fileSplitterFetch; //子线程对象 sR$/z9w long nFileLength; //文件长度 aU] nh. a boolean bFirst = true; //是否第一次取文件 &e4EZ boolean bStop = false; //停止标志 AeW_W0j File tmpFile; //文件下载的临时信息 Xu{S4#1 DataOutputStream output; //输出到文件的输出流 yyjgPbLN= 61z^(F$@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z8PV&o public SiteFileFetch(SiteInfoBean bean) throws IOException **n109R { Q>/[*(.Wd siteInfoBean = bean; lIatM@gU //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "Z
a}p|Ct tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5PKdMEK|q if(tmpFile.exists ()) sQ82(N7l { {1vlz>82 bFirst = false; q0_Pl* read_nPos(); )x&>Cf<, } SYv5{bff = else 7(zY:9|( { SciEHI# nStartPos = new long[bean.getNSplitter()]; ]=5D98B nEndPos = new long[bean.getNSplitter()]; ~uO9>(?D } m\|ie8 kQtnT7 I9jzR~T Z&y9m@ } /}-LaiS Y&*nj`n `H|#l\ public void run() [PU0!W; { `vrLFPdO //获得文件长度 % wh>_Ho //分割文件 `S/;S<'; //实例FileSplitterFetch a#P{ [ //启动FileSplitterFetch线程 ey[+"6Awne //等待子线程返回 -;[,`g(f try{ -<n]Sv;V if(bFirst) h&t9CpTfeJ { Y/n],(t) nFileLength = getFileSize(); '$be+Z32 if(nFileLength == -1) =MMSmu5! { <o_(,,P% System.err.println("File Length is not known!"); !bIhw}^C* } 8>V)SAI' else if(nFileLength == -2) ^$F1U,oi { %3$EV}dp System.err.println("File is not access!"); @EB2I+[ } Z;GZ?NOlY else F%q}N,W { *Q2}Qbu for(int i=0;i<nStartPos.length;i++) R;2
Z~P { M!b"c4|< nStartPos = (long)(i*(nFileLength/nStartPos.length)); =(>pv, } ;*8,PV0b_< for(int i=0;i<nEndPos.length-1;i++) mA']*)L1 { I> 3]VRi nEndPos = nStartPos[i+1]; p EbyQ[ } S9S%7pE nEndPos[nEndPos.length-1] = nFileLength; .t|B6n! } *z\L } HFrwf{J YST{
h{ #R3|nL //启动子线程 5Qgh\4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =LMM]'no, for(int i=0;i<nStartPos.length;i++) .Zv uhOn^ { 0:4w@"Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qEV>$>} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ju?D=n@i nStartPos,nEndPos,i); Lkl^
` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Mi&jl_& fileSplitterFetch.start(); $|bdeQPr\ } &>%9JXU // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xc6A&b>jI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5\eM3w'd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6'1m3<G_ nEndPos = " + nFileLength); d;O4)8> // fileSplitterFetch[nPos.length-1].start(); O;?Nz:/q O4fl$egQU 8P3"$2q //等待子线程结束 5]yby"Z?} //int count = 0; z;ko ) //是否结束while循环 a EmLf boolean breakWhile = false; _mn2bc9M ORP-@-dap V`XtGTx while(!bStop) % /Y; { w [7vxQ!- write_nPos(); 3Ja1|;(2 Utility.sleep(500); rc+}KO breakWhile = true; dw]jF=u ._IBO; *@ /32x|Ow# 1 for(int i=0;i<nStartPos.length;i++) Sn!5/9Y { DDwm;,eZ if(!fileSplitterFetch.bDownOver) N.@@ebuE { sW]fPa(cn, breakWhile = false; &pZncm break; RYuR&0_{ } }MXC0Z~si } xb~8uD5 if(breakWhile) @j|=M7B break; j0+l-]F- G2BB]] m3 Kk9W=vd //count++; s'Wu \r' //if(count>4) M"Q{lR // siteStop(); ];8S<KiS~ } 1'"TO5 r`GA5}M 5isqBu System.err.println("文件下载结束!"); G"|`&r@ } lLi)? catch(Exception e){e.printStackTrace ();} K)[DA*W } S{#L7S K]c\3[vR .bvEE //获得文件长度 /Mmts=^Ja public long getFileSize() Y~[k_! { {YigB int nFileLength = -1; Usz O--.C try{ @[. 0, URL url = new URL(siteInfoBean.getSSiteURL()); T_/ n#e HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1E]TH/JK httpConnection.setRequestProperty("User-Agent","NetFox"); * faG0le S5>?jn1 7/b\NLeJ' int responseCode=httpConnection.getResponseCode(); FH7h?!|t if(responseCode>=400) ee\QK,QV { zVyMmw\ processErrorCode(responseCode); Q.Xs%{B return -2; //-2 represent access is error LZH~VkK@m} } 'K*. ?M m;@8z[
^5
&-zW1wf String sHeader; L| K8 OD;F{Hc g`\5!R1 for(int i=1;;i++) `b?o%5V2x { S}/5W //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ^bG91"0A //Utility.log(in.readLine()); !@3"vd{^ sHeader=httpConnection.getHeaderFieldKey(i); _`.Wib+ if(sHeader!=null) My<.^~ { 2D)B%nM[ if(sHeader.equals("Content-Length")) 'B yB1NL { HP2J`>oo nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !hWS%m@ break; IF'Tj`yD } DrA\-G_7 } (j?ckah%V else ;fe~PPT break; B|SE | } DA_}pS" } wU(!fw\ catch(IOException e){e.printStackTrace ();} b>]k=zd catch(Exception e){e.printStackTrace ();} p!>DA?vF '@dk3:3t C8t;E` Utility.log(nFileLength); e82xBLxR% =M9;`EmC yIYQ.-DkS+ return nFileLength; _?v&\j } 7&&3@96<*# tE WolO[\ AjD?_DPc //保存下载信息(文件指针位置) IN7Cpg~9% private void write_nPos() P"f4`q
{ ,{2= nb[ try{ %sCG}?
y output = new DataOutputStream(new FileOutputStream(tmpFile)); {R8)DK
output.writeInt(nStartPos.length); sZPyEIXie for(int i=0;i<nStartPos.length;i++) I/* ULR,
{ sT'j36Nc<, // output.writeLong(nPos); 08G${@D+X0 output.writeLong(fileSplitterFetch.nStartPos); o@sL/5, output.writeLong(fileSplitterFetch.nEndPos); #Q` TH< } +vt?3i\^. output.close(); {H3B1*Dk } Pl\NzB,` catch(IOException e){e.printStackTrace ();}
Ruv`yfQ catch(Exception e){e.printStackTrace ();} 21[=xboU } d.yATP T^Ol=QCu #
11<=3Yj //读取保存的下载信息(文件指针位置) t?wVh0gT private void read_nPos() T/234;Uf| { yb6gYN try{ XwIKpr8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @{{6Nd5 int nCount = input.readInt(); IoZ_zz0 nStartPos = new long[nCount]; bF'Jm*f nEndPos = new long[nCount]; &}r-C97 for(int i=0;i<nStartPos.length;i++) S S fNI> { ,!dVhG# nStartPos = input.readLong(); 3b[.s9Q nEndPos = input.readLong(); 9#E)H?`g } 089v;
d 6 input.close(); mO2u9?N } _%G;^ b catch(IOException e){e.printStackTrace ();} ]Z?jo#F catch(Exception e){e.printStackTrace ();} |j=Pj)5J } W.BX6 ?=G{2E. aC94g7)` private void processErrorCode(int nErrorCode) |7QSr!{_ { bbT1p:RF System.err.println("Error Code : " + nErrorCode); 0BQ{ZT-Kh } B`)TRt+'. fd$nAE upnX7as //停止文件下载 9[R+m3V/` public void siteStop() [>KnMi=o) { CbwQbJ/v7 bStop = true; _+,>NJ for(int i=0;i<nStartPos.length;i++) '^`iF,rg fileSplitterFetch.splitterStop(); wZVLpF+7 qOv`&%txW Jl<pWjkZZ } P*n/qj8h } ^l<!:SS //负责部分文件的抓取 0#CmB4!<O **FileSplitterFetch.java pS2u&Y"u| */ $[oRbH8g package NetFox; Mm;[f'{M) \5}*;O@ VTwQD"oB import java.io.*; !j%uwje\ import java.net.*; iJ`zWpj+{Q tz5\O} CB#B!;I8v public class FileSplitterFetch extends Thread { ]k8f1F <}T7;knO B(f_~ ] String sURL; //File URL +j %y#_~ long nStartPos; //File Snippet Start Position kbo9nY1k
g long nEndPos; //File Snippet End Position Hb/8X
!= int nThreadID; //Thread's ID nk;^sq4M: boolean bDownOver = false; //Downing is over iBwM]Eyv. boolean bStop = false; //Stop identical r
uIgo B FileAccessI fileAccessI = null; //File Access interface J9MAnYd)i (3~^zwA Lp(i&A public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException I4KE@H"%7 { NFF!g]QN this.sURL = sURL; Z/T(4 this.nStartPos = nStart; tSe[*V4{' this.nEndPos = nEnd; |h&Z. nThreadID = id; kj6H+@
{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 xIwILY|W= } AiB]A} virt[5w yy+:x/(N[ public void run() &*745,e { WrS>^\: while(nStartPos < nEndPos && !bStop) ra2{8 x { zI\+]U' ksTK'7* 34Cnbtq^ try{ |AT`(71 URL url = new URL(sURL); ;/t~MH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0Y:)$h2? httpConnection.setRequestProperty("User-Agent","NetFox"); GG"6O_ String sProperty = "bytes="+nStartPos+"-"; `:C2Cj
httpConnection.setRequestProperty("RANGE",sProperty); Fy0sn| Utility.log(sProperty); "l hj1zZ M|Nh(kvH 9kB R /{ InputStream input = httpConnection.getInputStream(); |o+*Iy) //logResponseHead(httpConnection); `sDLxgwI 2j#Dwa(lZQ UB+7]S byte[] b = new byte[1024]; @AM11v\: int nRead; F`GXho[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *tv\5KW G { r*dNta< nStartPos += fileAccessI.write(b,0,nRead); wWSo+40 //if(nThreadID == 1) )U7fPKQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1wm`a } /='Q-`?9 hC9EL=
A ?z2! ? Utility.log("Thread " + nThreadID + " is over!"); BMqr YW bDownOver = true; wa~zb!y< //nPos = fileAccessI.write (b,0,nRead); /]U;7) } =z]rZSq*o catch(Exception e){e.printStackTrace ();} &H
P g> } t2YB(6w+xg } ens]?,`0 t\}_WygN <EQaYZY= //打印回应的头信息 d!4TwpIgx public void logResponseHead(HttpURLConnection con) (z8;J>7 { QBG jH^kL for(int i=1;;i++) I ~^Xw7 { bt(Y@3; String header=con.getHeaderFieldKey(i); )EQz9 if(header!=null) v~yw-}fk% //responseHeaders.put(header,httpConnection.getHeaderField(header)); H^54o$5 Utility.log(header+" : "+con.getHeaderField(header)); w/"vf3}(9 else \.}ZvM$ break; %H;}+U]Z } 8a&c=9 } |a
a\t K&RIF]0#G JWYe~ public void splitterStop() cy)-Rfg { ![nL/ bStop = true; S;jD@j\t& } #p7gg61 1X7GM65# tC(Ma I } : p)R,('g ij!], 5!cp^[rGL /* }2;iIw` **FileAccess.java <:NahxIlu *//文件访问(定位,写) B- $?5Ft! package NetFox; %l14K_ import java.io.*; *v]s&$WyO [ZC\8tP`V ZNM9@;7 public class FileAccessI implements Serializable{ |TP, TET=>6
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 lM}-'8tt? RandomAccessFile oSavedFile;
iF":c}$. long nPos; /H"fycZ )Tp"l"(G 09trFj$L public FileAccessI() throws IOException 7(uz*~Z?`0 { dP+wcl4 this("",0); DB65vM } ,|3_@tUl _p5#`-%mM 5S2 j5M00 public FileAccessI(String sName,long nPos) throws IOException ]z5hTY { ~*"ZF-c, oSavedFile = new RandomAccessFile(sName,"rw"); C:}1r this.nPos = nPos; HA,8O[jon oSavedFile.seek(nPos); RgUQ: } ~[dL:=?c }A,!|m4 KvEv0L<ky public synchronized int write(byte[] b,int nStart,int nLen) ZSW@,Ti { c"-X:m" int n = -1; Maq`Or|4 try{ L+p}%!g oSavedFile.write(b,nStart,nLen); Y]KHCY n = nLen; `e~i<Pi } n6.Z{Q'b catch(IOException e) ZSwuEX { F'OO{nF e.printStackTrace (); o $W@@aM } (H&HSs y<w_>O uR{)%udu return n; -gk2$P- } VFx[{Hy li
v=q /*{'p!? } |>.MH }e/vKWfT `4snTM!v& /* 2>o^@4PnZ **SiteInfoBean.java VevG 64o */ K-)!d$$
package NetFox; gd]S;<Jh HcJ!( Q~qM;l\i public class SiteInfoBean { pfHjs3A= y<j7iN wK7w[Xt private String sSiteURL; //Site's URL m$^5{qpg private String sFilePath; //Saved File's Path q~
ZUtF private String sFileName; //Saved File's Name A{J?I: private int nSplitter; //Count of Splited Downloading File ?d%{- =X^a _u^3uzu public SiteInfoBean() |h6!b t!= {//nSplitter的缺省值为5 vA!IcDP" //default value of nSplitter is 5 D
(8Z90 this("","","",5); 4'*-[TKC } 3<+ZA-2 V 0Oqq0\ }BU%<5CQ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6vAZLNG3 { X/cb1# sSiteURL= sURL; h U-FSdR sFilePath = sPath; !reOYt| sFileName = sName; Hzm_o>^KC this.nSplitter = nSpiltter; Uq_lT, cZ|NGkZ ga/zt-& } z9 Ch %A{ ~cSXBc,+ 3^%2, public String getSSiteURL() ,7bhUE/VB { %L-qAI&V return sSiteURL; /CO=!*7fz
} FXDB> }8 hZ452W Y:O|6%00Y public void setSSiteURL(String value) %a
WRXW@c { %LP4RZ sSiteURL = value; , +J)`+pJx } IB|6\uKn DJ<+" .v! .O'~s/h public String getSFilePath() {[tmz;C { yP# Y:s return sFilePath; ]s0wJD= } zps=~| SyI~iW#Y1 \By_mw public void setSFilePath(String value) mY/"rm { <(@S;?ZEW sFilePath = value; 8Cp@k= } 5NUaXQ O2ktqAWx@ N,rd= m+ public String getSFileName() 3{|~'5* { 1!G}*38; return sFileName; HQ9tvSc } yOQae m^O kN1R8| pv "*D9.LyM public void setSFileName(String value) {+_p?8X { g$#A'Du sFileName = value; "Y L^j~A } t?-a JU d3q.i5']G Qd YYWD
public int getNSplitter()
=cS5f#0 { "GZ}+K*GG return nSplitter; %V]v, } sV2D:%\K: L5 Cfa- 5PZ7-WJ/ public void setNSplitter(int nCount) )'f=!'X { -r<8mL:yW nSplitter = nCount; y*X.DS 1(w } 6>#8^{[ } WHBGhU "Hz%0zP& $`W3`}#fM /* }"WovU{*s **Utility.java K;"oK */
0LL65[ package NetFox; V6[jhdb qGH[kd )@I] Rk? public class Utility { 9y&;6V.' Xw'sh#i2 $8U$.~v public Utility() m-\_L=QzM { 4(P<'FK $ v{|y,h&]a CSoVB[vS } ww7nQ}H5( rQ _cH //线程睡眠 3bezYk public static void sleep(int nSecond) )8g&lyT { 2;>uP#1] try{ h%u!UHA Thread.sleep(nSecond); GqsV6kH } Z7pX%nj_ catch(Exception e) 5EQ)pH+ { CQ. C{ e.printStackTrace (); e8dZR3JL } ^&86VBP } E"p _!!1 H/M]YUs/3 //日志 p<'pqf public static void log(String sMsg) k"gm;,` { -f ~1Id System.err.println(sMsg); "#gKI/[qxq } QnBWZUI &F:.V$ ob/<;SrU< public static void log(int sMsg) @.a59kP8X { J`0dF<<{[y System.err.println(sMsg); ZDzG8E0Sq } r vq{Dfo= } >gL&a#<S .!L{yU, qvo!nr7 /* HxW/t7Z( **TestMethod.java (_FeX22+ */ RAu(FJ package NetFox; 6(7{|iY
Q%q;=a hG~.Sc:G public class TestMethod { (-0d@eqw q({-C Tf!6N<dRXR public TestMethod() ltkARc3 { ///xx/weblogic60b2_win.exe :d35?[ try{ #W/Ch"Kv SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); <m~8pM //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); q%q+2P> SiteFileFetch fileFetch = new SiteFileFetch(bean); LqI&1$# fileFetch.start(); N-2_kjb! } Bf y catch(Exception e){e.printStackTrace ();} A#?Cts,M 0Cf'\2
S2|pn\0V } V\L%*6O 73S
N\ eB9&HD: public static void main(String[] args) zBq&/? { A7#nBHwxZ new TestMethod(); ucz~y!4L{ } vJi<PQ6 } WQN`y>1#@_ 点击下载更多相关资料
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