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/* (~en ( **SiteFileFetch.java )Beiu* */ `#gie$B{ package NetFox; <o= 8FO import java.io.*; veRm2LSP import java.net.*; h-D}'R +U.I( 83F 7!$^r$t public class SiteFileFetch extends Thread { -tNUMi' !YJs]_Wr T n}s*<=V SiteInfoBean siteInfoBean = null; //文件信息Bean |&[EZ+[ long[] nStartPos; //开始位置 6 _ow%Rx~F long[] nEndPos; //结束位置 =>dGL| FileSplitterFetch[] fileSplitterFetch; //子线程对象 <rmvcim{* long nFileLength; //文件长度 lA-h`rl/ boolean bFirst = true; //是否第一次取文件 l0hlM# boolean bStop = false; //停止标志 _7)n(1h[3b File tmpFile; //文件下载的临时信息 ->{KVPHe{ DataOutputStream output; //输出到文件的输出流 +H2-ZXr d'I"jZ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) w'3iY,_ufC public SiteFileFetch(SiteInfoBean bean) throws IOException -S+zmo8 { {u9}bx'< siteInfoBean = bean; D1mfm.9_r^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 2T TdH) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); BRYHX.}h\A if(tmpFile.exists ()) ^KE%C;u { +t:0SRSt bFirst = false;
*cnNuT read_nPos(); {91nL'-' } kE(mVyLQ else Pco'l#: { v 6Vcjm nStartPos = new long[bean.getNSplitter()]; v]c6R-U nEndPos = new long[bean.getNSplitter()]; /^|Dbx!u } R^e.s
- s|B3~Q] &l[$*<P5V &(mR>
mT } -FCe:iY! A !&Pui{F D#/Bx[ public void run() [ps*uva { jMDY(mwt //获得文件长度 BI}Cg{^km //分割文件 3 SGDy] //实例FileSplitterFetch HOh!Xcu //启动FileSplitterFetch线程 CWP2{ //等待子线程返回 I15{)o(8$ try{ c\V7i#u[d; if(bFirst) )@'}\_a3[] { C=4Qlt[` nFileLength = getFileSize(); P}G+4Sk if(nFileLength == -1) D{~fDRR { U!Z,xx[] System.err.println("File Length is not known!"); A$xF$l } (/*]?Ehd else if(nFileLength == -2) lo!+f"7ym\ { ~**.|%Kc System.err.println("File is not access!"); AjgF6[B } [=^3n#WW else R+,u^;\ { KFkoS0M5| for(int i=0;i<nStartPos.length;i++) LRMx<X8 { :TC@tM~Oy nStartPos = (long)(i*(nFileLength/nStartPos.length)); NL0n009"c$ } QS]1daMIK< for(int i=0;i<nEndPos.length-1;i++) }<y7bqA { @[i4^ nEndPos = nStartPos[i+1]; om-omo&,X= } Q( {
r@*g nEndPos[nEndPos.length-1] = nFileLength; m<qJcZk } +V^;.P</ } [bNx^VP* \`\ZTZni h@]XBv //启动子线程 Wh2tNyS fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h@WhNk7"xa for(int i=0;i<nStartPos.length;i++) Ziu]'# { 2oRg 2R} fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A4<Uu~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 8d-t|HkN nStartPos,nEndPos,i); ;K&o-y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JNUt$h fileSplitterFetch.start(); B=A [ymm } pDCeQ6? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3+fp2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9lH?-~9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", U,- 39mr nEndPos = " + nFileLength); cFnDmtI: // fileSplitterFetch[nPos.length-1].start(); l.bYE/F0& jc f #6 #!KE\OI;@5 //等待子线程结束 YgV817OV //int count = 0; zXxT%ZcCj //是否结束while循环 4l45N6" boolean breakWhile = false; 6Yxh9*N~] YLE!m? '9j="R; while(!bStop) mh[75( { Gc; {\VU write_nPos(); 6N
S201o Utility.sleep(500); O[)kboY breakWhile = true; K]"#C [ )dXI IM JU5C}%Q6 for(int i=0;i<nStartPos.length;i++) b4ONh% { A_5P/ARmI if(!fileSplitterFetch.bDownOver) 0h\smqm { -Z
Ugx$ breakWhile = false; CxG#"{& break; vucxt }Ti } Om@C
X<(9C } :GP]P^M;G@ if(breakWhile) ApV~(k)W break; ~C`^6UQr/? 9g"2^^wD wN-d'-z/rd //count++; {I #]@, //if(count>4) 1@1U/ss1 // siteStop(); c%G{#}^2 } #(JNn'fzq <\ :Yk c~uKsU System.err.println("文件下载结束!"); tL)t" i } >X4u]>X catch(Exception e){e.printStackTrace ();} Zk"eA'"\ } k $J zH$ kB|B ~h85BF5 //获得文件长度
&NoS=(s, public long getFileSize() VAf1 " )pC { 9Ujo/3,Ak int nFileLength = -1; z'\_jaj^ try{ E!l!OtFL URL url = new URL(siteInfoBean.getSSiteURL()); SY^t} A7:/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b+6\JE^Mz httpConnection.setRequestProperty("User-Agent","NetFox"); Xudg2t)+K _p&]|~a ZR]25Yy int responseCode=httpConnection.getResponseCode(); )~] (& if(responseCode>=400) NzOo0tz: { IS
2^g>T#1 processErrorCode(responseCode); <_tT<5'[$u return -2; //-2 represent access is error Md2>3- } YSh+pr 5$&%re!{Z orfO^;qTY String sHeader; /!$c/QZ fM63+9I)\ K]0:?h;%Ld for(int i=1;;i++) 4?7W+/~<& { ytoo~n //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3.W@ } //Utility.log(in.readLine()); 3#&7-o sHeader=httpConnection.getHeaderFieldKey(i); |>htvDL if(sHeader!=null) 6%Pdy$ P { Vz~nT if(sHeader.equals("Content-Length")) (Cd\G=PK { J/GSceHF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $[&*Bj11Yg break; G<f@#[$' } af+IP_6
. } 80/F7 q'tn else .#Z%1U%P. break; \r,Q1n?7
} Rh{zH~oZ } 7-T{a<g catch(IOException e){e.printStackTrace ();} A1#%`^W9 catch(Exception e){e.printStackTrace ();} #+5pgD2C aL%AQB, {{MRELipW Utility.log(nFileLength); DRgTe&+ ul2")HL]; CS-uNG6 return nFileLength; ayD}r#7 } }mdAM6 ,Bo>E: u H77" //保存下载信息(文件指针位置) .CU5}Tv- private void write_nPos() mkF" { qX
try{ Boz@bl mCB output = new DataOutputStream(new FileOutputStream(tmpFile)); wl$h4 {L7 output.writeInt(nStartPos.length); &n?^$LTPY for(int i=0;i<nStartPos.length;i++) 9;Ox;;w { :Q_<Z@2Y{ // output.writeLong(nPos); M9@ri ^x
output.writeLong(fileSplitterFetch.nStartPos); TGe;HZ output.writeLong(fileSplitterFetch.nEndPos); T {Uc:Z } c|62jY"$-2 output.close(); okv 1K } C{DvD'^ catch(IOException e){e.printStackTrace ();} Dzs[GAQ] catch(Exception e){e.printStackTrace ();} fCtPu08{Z } 9Z'8!$LYg q51Uf_\/ p)3U7"q //读取保存的下载信息(文件指针位置) @u%_1 private void read_nPos() EC8b=B<DE { S. q].a try{ ct,l^|0Hu8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); WjwLM2<nK7 int nCount = input.readInt(); Ii_ojQP-z nStartPos = new long[nCount]; 88h3|'* nEndPos = new long[nCount]; ),!;| bh for(int i=0;i<nStartPos.length;i++) F[[TWf/ { GF%314Xu nStartPos = input.readLong(); I{:(z3 nEndPos = input.readLong(); .j>hI="b } /&{$ pM|? input.close(); )!:Lzi } lBFMwJU) catch(IOException e){e.printStackTrace ();}
q^L<X) catch(Exception e){e.printStackTrace ();} qfz 8jY] } xD[Gq% /iV}HV0 hcbv;[bG private void processErrorCode(int nErrorCode) A\#P*+k 0 { o b|BXF System.err.println("Error Code : " + nErrorCode); Y +\% } yK2^Y]Ku? '@CR\5 @ 7C2&NyWJ //停止文件下载 CL}{mEr} public void siteStop() (B-43!C { `8>Py~ bStop = true; g9WGkHF for(int i=0;i<nStartPos.length;i++) |{ PI102 fileSplitterFetch.splitterStop(); ['*8IWg w{90` z7Eg5rm|QZ } g
HbxgeL } 6]pX>Xho //负责部分文件的抓取 Y.U[wL> **FileSplitterFetch.java R%
,<\d7 */ Xy &uZ package NetFox; V-r3-b #\ n8M 0#*#a13 import java.io.*; ]
0m&(9 import java.net.*; 3lq Mucr TkO[rAC 7ei|XfR public class FileSplitterFetch extends Thread { 3^~KB'RZ V{&rQ@{W [mr9(m[F String sURL; //File URL m7GR[MR
long nStartPos; //File Snippet Start Position u=/CRjot long nEndPos; //File Snippet End Position pOkLb
# int nThreadID; //Thread's ID JiU9CeD3 boolean bDownOver = false; //Downing is over ?8mlZ
X9C boolean bStop = false; //Stop identical U}l14 FileAccessI fileAccessI = null; //File Access interface zf>5,k'x'A C2w2252T 5W@jfh) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v[n7" { D.6,VY H this.sURL = sURL; -+em!g' this.nStartPos = nStart; 'EfR|7m this.nEndPos = nEnd; hy T1xa nThreadID = id; k8uvNLA)a fileAccessI = new FileAccessI(sName,nStartPos);//定位 {E0z@D)U- } LW:LFzp D^;*U[F? ed_FiQd public void run() zb
Z4|_ { 'vaLUy9] while(nStartPos < nEndPos && !bStop) _:B1_rz7, { rzI|?QaPi Wt9Q;hK Q9&kJ%Mo try{ 3QOUU,Dt$ URL url = new URL(sURL); a9?y`{%L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?kz+R' httpConnection.setRequestProperty("User-Agent","NetFox"); }AvcoD/b String sProperty = "bytes="+nStartPos+"-"; N9<Ujom httpConnection.setRequestProperty("RANGE",sProperty); h}Wdh1.M3 Utility.log(sProperty); 1uk0d`JL 3o|I[!2. ,mL
!(US InputStream input = httpConnection.getInputStream(); k%op>
& //logResponseHead(httpConnection); <JwX_\?ln !;!~n` b2b75}_A byte[] b = new byte[1024]; +EM_TTf4 int nRead; &h,5:u while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) aRJ>6Q} { ?P7]u>H nStartPos += fileAccessI.write(b,0,nRead); <(e8sNe //if(nThreadID == 1) |J~eLh[d // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CCGV~e+ } ACK1@eF }V|{lvt. sW^a`VM Utility.log("Thread " + nThreadID + " is over!"); =_8Tp~j bDownOver = true; `j9$T:` //nPos = fileAccessI.write (b,0,nRead); m3g2b _; } Q9`QL3LQD catch(Exception e){e.printStackTrace ();} a%Jx
`hx } 5Y3i|cj } -sMyt HH. 8g>b [!VOw@uz //打印回应的头信息 U#o'H @ public void logResponseHead(HttpURLConnection con) 6R29$D|HFO { ='E$-_ for(int i=1;;i++) oQj=;[ { Ij'NC C String header=con.getHeaderFieldKey(i); 47T}0q, if(header!=null) ^-M^gYBR //responseHeaders.put(header,httpConnection.getHeaderField(header)); ._96*r=o Utility.log(header+" : "+con.getHeaderField(header)); a/uo}[Y else Z2bcCIq4 break; i$KpDXP\ } ]fI/(e_U } 4E:bp W];EKj,3W &wetzC) public void splitterStop() BD#.-xWV { e|r0zw S bStop = true; ARfRsPxr } k 2%S`/: G 8Y+w cxYfZ4++m } )OsLrq/ ~ekh1^evu vY*\R0/a /* Yp4c'Zk **FileAccess.java *V;3~x! *//文件访问(定位,写) gK3Mms]}m package NetFox; ;#G%U!p import java.io.*; /LQ:Sv7 mi2o1"Jd$` HpexH{.u) public class FileAccessI implements Serializable{ )-/gLZsx y$tX-9U //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p11G#.0 RandomAccessFile oSavedFile; &4$oudn long nPos; WO,xMfK [ev-^[ cVq}c? public FileAccessI() throws IOException '?Iif#Z1 { <V_7|)'/A this("",0); >AI<60/< } *N/hc ,dd WBwMK aN^IP public FileAccessI(String sName,long nPos) throws IOException hGP1(pH. { Vul+]h[!h oSavedFile = new RandomAccessFile(sName,"rw"); q3'o|pp this.nPos = nPos; fV ZW[9[ oSavedFile.seek(nPos); |Zq\GA } xNN@ 1P[* hWcTI{v i.rU&yT% public synchronized int write(byte[] b,int nStart,int nLen) z4}
%TT@^ { hPufzhT int n = -1; D(r:}pyU try{ G"S5ki`o oSavedFile.write(b,nStart,nLen); Kv+Bfh n = nLen; e4qj .b } ibF#$&! catch(IOException e) S@:B6](D$ { U 0ZB^` e.printStackTrace (); :LV.G0)# } <Ns &b.\h6 >v0 :qN7| {&nV4c$v return n; \/Ij7nD`l% } MMD<I6Iyv ,{j4 +*t|yKO>[ } TV{)n'aA t^@T`2jL
c#q"\" /* 6d{j0?mM **SiteInfoBean.java ?TuI:dC */ "]]q} O? package NetFox; d]M[C[TOX 2X@G" %N~;{!![p public class SiteInfoBean { "oE* 9J?e K~>jApZ% ~5t?C<wo private String sSiteURL; //Site's URL xtJAMo>g private String sFilePath; //Saved File's Path !O\X+#j private String sFileName; //Saved File's Name $au2%NL private int nSplitter; //Count of Splited Downloading File {of]/3= 0:dB
9 xYR#%! M public SiteInfoBean() vbn>mg5 {//nSplitter的缺省值为5 a8h]n:! //default value of nSplitter is 5 G6Q4-kcK this("","","",5); `Ei"_W } m,NMTyJoz Mj~${vj `45d"B
I public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) POBpJg { piu0^vEEH sSiteURL= sURL; `$9L^Yg,4 sFilePath = sPath; 31 ]7z sFileName = sName; 4Vx+[8W this.nSplitter = nSpiltter; 9U10d&M( YY!!<2_ 9N}W(> } =QiT)9q) P{lh)m> j<$R4A1 public String getSSiteURL() f8!l7{2%q { @9_)On9hZ return sSiteURL; p}8ratmN } WTu{,Q v>^jy8$ |+/$ g. public void setSSiteURL(String value) )_O.{$
to { Y\u_+CG* sSiteURL = value; /.-m}0h|W- } aL$j/SC B*Cb6'Q 4sd-zl$Of public String getSFilePath() U$$3'n { 8DT@h8tA return sFilePath;
?zE< } 4[H,3}p9H -wIM0YJ R`7n^, public void setSFilePath(String value) c'lIWuL) { B'/Icg.T sFilePath = value; X)NWX9^;' } t>@yv# D'?]yyrf \I
xzdFF# public String getSFileName() Wy,"cT { w#d} TY return sFileName; mdt
?:F4Q } 2?H@$-x> T Xl\hL\+ L)G">T; public void setSFileName(String value) r
&c_4%y { Hc
/wta sFileName = value; Fi k@hu } Q^ q=!/qQ j%GbgJ {"\q(R0 public int getNSplitter() N
I3( { *e, CDV return nSplitter; YrKFa%k } 5EfY9}dl S r[IoF) 9 G((wiE public void setNSplitter(int nCount) z.A4x#>- { k2wBy'M.' nSplitter = nCount; j>V"hf } (mY(\mu} } -|$* l
Q 0.(zTJ _AAx
) /* 3v G **Utility.java w=gQ3j#s */ U!_sh< package NetFox; 7~lB}$L NB3/A"}"02 `lvh\[3^ public class Utility { sV&`0N &8juS,b 78^Y;2 P]W public Utility() l4DeX\ly7f { SUSc 0ZFB4GL ^U"
q|[qy } Vzk cZK B_b8r7Vn` //线程睡眠 d[yrNB6| public static void sleep(int nSecond) r \9:<i8 { i~(#S8U4d try{ 69?I?,7 Thread.sleep(nSecond); Bac?'ypm } _RgxKp/d catch(Exception e) `$f\ % { %d ZM9I0 e.printStackTrace (); JPHUmv6 } a{5H33JA } kzW\z4f \8
g. //日志 [6oq## public static void log(String sMsg) IBzHR[#,^ { O5c_\yv= System.err.println(sMsg); EP/&m|o|G } 5wy;8a fHW-Je7mG %!>k#F^S public static void log(int sMsg) s}Xi2^x { -%saeX Wo System.err.println(sMsg); d4[poi ~ } 2f s9JP{^0 } `x5ll;"J $Gr4sh!cE }FuVY><l /* v4X_v!CQ **TestMethod.java 1w(<0Be */ 1 VPg`+o package NetFox; U<1}I.hDJ +'!h-x1y~ :17ee public class TestMethod { $0ym_6n BYTXAZLb :t_}_!~ public TestMethod() ;D6x=v=2 { ///xx/weblogic60b2_win.exe @2QJm try{ wEZqkV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); p!. / //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _a?wf!4>P SiteFileFetch fileFetch = new SiteFileFetch(bean); Q1]V|S;)X fileFetch.start(); ]Fb8.q5(Y } s$IcDuBu catch(Exception e){e.printStackTrace ();} ~oEXM?M Xcs8zT wOD/Z8 } X%RQB$ PEMxoe<+ |p'_k(z} public static void main(String[] args) h[vAU 9f)
{ ke{DFqh new TestMethod(); $Vd?K@W[h } qb#V) } _SU,f> 点击下载更多相关资料
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