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/* a?h*eAAc. **SiteFileFetch.java Gbpw5n;e */ 26?W
nu60 package NetFox; K>:]Bx#F7 import java.io.*; aW_oD[l import java.net.*; d~J-|yyT .wA+S8}S `mfq
2bVc public class SiteFileFetch extends Thread { uP $Cj n{0Ld -zH K BE Ax3 SiteInfoBean siteInfoBean = null; //文件信息Bean oTjyN\?H long[] nStartPos; //开始位置 G6P)C##ibn long[] nEndPos; //结束位置 m0w;8uF2UV FileSplitterFetch[] fileSplitterFetch; //子线程对象 eDI=nSo long nFileLength; //文件长度 7R.Q
Ql boolean bFirst = true; //是否第一次取文件 +gd2|`# boolean bStop = false; //停止标志 PC$CYW5 File tmpFile; //文件下载的临时信息 Vgb *% I DataOutputStream output; //输出到文件的输出流 lA(Q@yEW _Q%vK*n //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %VJ85^B3 public SiteFileFetch(SiteInfoBean bean) throws IOException p^kUs0$GS { P;[OWSR[d siteInfoBean = bean; ^$>XW\yCs //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); n%^ LPD if(tmpFile.exists ()) Z7rJ}VP { #m{{a]zm^ bFirst = false; =WdaxjenZ/ read_nPos(); RgdysyB } vr^~yEr else -~[9U, { Lf([dE1 nStartPos = new long[bean.getNSplitter()]; )5j;KI%t nEndPos = new long[bean.getNSplitter()]; 3ya1'qUC } b !@Sn/ >7`<!YJkK {gA\ph%s V-I(WzR9y } `(+o=HsD SKuIF*"!S <$w?/y/' public void run() >SN|?|2U/ { cfox7FmW //获得文件长度 "'8KV\/D //分割文件 s]T""-He //实例FileSplitterFetch zf4Ec-) //启动FileSplitterFetch线程 KfBTL!0# //等待子线程返回 &1l=X]% try{ ]q-g[e' if(bFirst) .6O"|
Mqb { 9!9Z~/*m nFileLength = getFileSize(); A7!g if(nFileLength == -1) MS(JR { >e2<!#er| System.err.println("File Length is not known!"); EM7+VO( } ccCzu6 else if(nFileLength == -2) {GvTfZfp { Am8x74? System.err.println("File is not access!"); +,:du*C } 4`Q3v4fOF else O\K_q7iO6 { oLWJm for(int i=0;i<nStartPos.length;i++) e*(b { Lb{e,JH nStartPos = (long)(i*(nFileLength/nStartPos.length)); KZ!3j_pKy } $F.([?)k? for(int i=0;i<nEndPos.length-1;i++) 1Z[/KJ { *Nyev]8 nEndPos = nStartPos[i+1]; K =.%$A } #`GY}-hL! nEndPos[nEndPos.length-1] = nFileLength; j1SMeDDM
~ } hYQ_45Z*? } th6+2&B6 st"{M\.p 5L:1A2Z?c //启动子线程
tvXW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #jAqra._b for(int i=0;i<nStartPos.length;i++) x^"ES%* { IHgeQ F
~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kc/{[ME siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b{fQ|QD{^E nStartPos,nEndPos,i); |F.)zC5{ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =%zLh<3v fileSplitterFetch.start(); X2tk[Kr } {;2vmx9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &V|>dLT>A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9%*wb`& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )BfT7{WN nEndPos = " + nFileLength); #W.vX?-'0 // fileSplitterFetch[nPos.length-1].start(); tBTTCwNT% +0),xu lpH=2l$>? //等待子线程结束 x8;`i$ //int count = 0; 9N%JP+<89 //是否结束while循环 0Z|FZGRP boolean breakWhile = false; ExHKw~y9
2<mW\$ H:p Z-v* while(!bStop) .1 %T
W) { RE.r4uOJg write_nPos(); X7L8h'(@ Utility.sleep(500); B3Jgd,[ breakWhile = true; 3]-_q"Co4f ?Qb<-~~
j1 kY]W
Qu for(int i=0;i<nStartPos.length;i++) jL)WPq!m+ { &R~n>>c if(!fileSplitterFetch.bDownOver) O4<g%.HC6 { iqnJ~g breakWhile = false; (;. AS break; 'WHHc 9rG, } B*htN } Ifk#/d if(breakWhile) ::n;VY2& break; !L5jj#0 -/]W+[ PX|=(:(k //count++; J8y0d1SG //if(count>4) &h*S
y // siteStop(); OL7_'2_z. } 5 ,0d ,wKe
fpV;5 */ G<!W System.err.println("文件下载结束!"); sBv>E}*R } TwyM\9l7 catch(Exception e){e.printStackTrace ();} D71;&G]0 } Qr#1 u Z -%(~ 2!N8rHRt //获得文件长度 R~bC,`Bh public long getFileSize() BF{w)=@/' { y {q*s8NY int nFileLength = -1; 1e xl0]- try{ iAY!oZR(WT URL url = new URL(siteInfoBean.getSSiteURL()); hzI*{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .s/fhk, httpConnection.setRequestProperty("User-Agent","NetFox"); W:i?t8y\y 3p?KU- >]'yK!a? int responseCode=httpConnection.getResponseCode(); ~.PP30' if(responseCode>=400) dBO@6*N4c { c= UU" processErrorCode(responseCode); F>]#}_ return -2; //-2 represent access is error F#xa`*AP } 5>9Y|UU 3CTX -#)vS NGYyn`Lx String sHeader; 4!`bZ`_Bw wx=0'T-[ s!/TU{8J for(int i=1;;i++) 4
;Qlu { r%Rs0)$yj //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); XwM611 //Utility.log(in.readLine()); S)He$B$pp sHeader=httpConnection.getHeaderFieldKey(i); HEK-L)S.
* if(sHeader!=null) !BU)K'mj { 3*DXE9gA9 if(sHeader.equals("Content-Length")) \^*<
y-jL { x4Rk<Th"o nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &O[s: break; 4^c-D } E04l| } OH<?DcfeL else tXF]t
break; yh;Y,;4 } $ &5w\P } 6FfOH<\z6i catch(IOException e){e.printStackTrace ();} 8F;>5i catch(Exception e){e.printStackTrace ();} \d.F82 9T2xU3UyY YHxbDf dA Utility.log(nFileLength); jm>3bd gL$&@NY '(@YK4_M return nFileLength; )"@t6. } &!7+Yb(1 OQ_stE2i s #:%x# //保存下载信息(文件指针位置) A3P9.mur private void write_nPos() \hk/1/siyF { 1`r| op}, try{ E|Bd>G output = new DataOutputStream(new FileOutputStream(tmpFile)); ?s}
% output.writeInt(nStartPos.length); p|6v~ for(int i=0;i<nStartPos.length;i++) cErI%v}v0 { aP~gaSx // output.writeLong(nPos); RcY[rnI6 output.writeLong(fileSplitterFetch.nStartPos); 7-iIay1h" output.writeLong(fileSplitterFetch.nEndPos); ka7uK][ } +KK$0pL output.close(); 2@@l {Y0f6 } fhpX/WE6 catch(IOException e){e.printStackTrace ();} [p;*r)f2} catch(Exception e){e.printStackTrace ();} tR`S#rk } Unl?fXI H9"= p QrjDF> //读取保存的下载信息(文件指针位置) =v2%Vs\7k private void read_nPos() ^^LjI { %&] 1FhL try{ ?#[)C=p]z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); jPwef##~7 int nCount = input.readInt(); lSCY5[? nStartPos = new long[nCount]; 'C]jwxy nEndPos = new long[nCount]; _
VKgs]Y for(int i=0;i<nStartPos.length;i++) zGs|DB { : ^(nj7D nStartPos = input.readLong(); kyAs'R@z nEndPos = input.readLong(); "Pdvmur } u~Lu<3v input.close(); Y?!/>q } ;/A}}B]y catch(IOException e){e.printStackTrace ();} Fzs>J&sY& catch(Exception e){e.printStackTrace ();} 9".Uc8^p/F } D0M!"c>\ wiV&xl =YoTyq\ private void processErrorCode(int nErrorCode) XARSGAuw { HWbBChDF System.err.println("Error Code : " + nErrorCode); |0w~P
s } # ITLz!gE "'aqb~j^ 5rF /323z //停止文件下载
oP-;y&AS public void siteStop() {d}26 $<$] { <j"O%y. bStop = true; /$*; >4=>f for(int i=0;i<nStartPos.length;i++) /'`6
;
uRN fileSplitterFetch.splitterStop(); 0#
UAjT3 Zjt9vS) 3GINv3_ } ;_bq9x } z (#Xca //负责部分文件的抓取 Sgx+V"bkT **FileSplitterFetch.java Fj3^
#ly */ g\j>qUjs%Q package NetFox; 6m\*]nOy4 3Pa3f >}- v['AB4 import java.io.*; _X?y,# import java.net.*; * S{\#s *|CLO|B) q|/!0MU" public class FileSplitterFetch extends Thread { F]Pul|.l B~4mk SE-} XI\ String sURL; //File URL |'@V<^ GR long nStartPos; //File Snippet Start Position .yG8B:7N2 long nEndPos; //File Snippet End Position >]C<j4 int nThreadID; //Thread's ID }o{!}g9 boolean bDownOver = false; //Downing is over z.{HD9TD boolean bStop = false; //Stop identical P$F#,Cn FileAccessI fileAccessI = null; //File Access interface xz="|HD); Hc"N&
%X[ AV9:O{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =^ gvZ|] { @eA %(C this.sURL = sURL; *SXSF95 this.nStartPos = nStart; vr<)Ay this.nEndPos = nEnd; 0.3^ nThreadID = id; ;q'DGzh fileAccessI = new FileAccessI(sName,nStartPos);//定位 !+%Az*ik } +i2YX7Of +6wx58.B& ho(5r5SNE public void run() rn[$x(G { |:\$n}K while(nStartPos < nEndPos && !bStop) aKaR { vRq=m8 CuF%[9[cT r=xTs,xx try{ !7ph,/P$7 URL url = new URL(sURL); HIQ]"Hl HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \IO$+Guh httpConnection.setRequestProperty("User-Agent","NetFox"); t*5z1T? String sProperty = "bytes="+nStartPos+"-"; jM{(8aUG httpConnection.setRequestProperty("RANGE",sProperty); $(Z]TS$M& Utility.log(sProperty); [BJ$|[11 s0_-1VU +"TI_tK,S InputStream input = httpConnection.getInputStream(); Q@ykQ //logResponseHead(httpConnection); .G7]&5s Tyg$`\# TW'E99wG byte[] b = new byte[1024]; +e&m#d int nRead; *1 n;p)K while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :|*Gnu { l{M;PaJ`} nStartPos += fileAccessI.write(b,0,nRead); OHx,*}N //if(nThreadID == 1) pil0,r
$D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *#ob5TBq[ } !C9ps]6 !N@S^JD6 _"R3N Utility.log("Thread " + nThreadID + " is over!"); oi33{#%t bDownOver = true; uW\@x4 //nPos = fileAccessI.write (b,0,nRead); EqNz L*E }
c4!c_a2pS catch(Exception e){e.printStackTrace ();} tdMP,0u } v#FJ+ } B,BOzpb( !mpMa]G3 >
{'5>6u //打印回应的头信息 =8$(i[;6w public void logResponseHead(HttpURLConnection con) Z`SWZ< { F]URf&U for(int i=1;;i++) X]3l| D { twYB=68 String header=con.getHeaderFieldKey(i); tu?Z@W/ if(header!=null) "/ a*[_sV //responseHeaders.put(header,httpConnection.getHeaderField(header)); Li c{'w& Utility.log(header+" : "+con.getHeaderField(header)); 8|S1|t, else p[af[! break; !%Z)eO~Z } hB2s$QS } LP0;n\ 2m)kyQ m<,y-bQ*( public void splitterStop() p ?Ij-uo"o { OTNZ!U/)j bStop = true; d
@^o/w8 } I9Edw] #um1?V G]m[S- } &8:iB {n T ?<'= iaaH9X
% /* j"D0nG, **FileAccess.java fRv
S@ *//文件访问(定位,写) @y;tk$e package NetFox; =@ L5 import java.io.*; ,,wyydG lo>-}xd n{qw ]/ public class FileAccessI implements Serializable{ "$,}|T?Y` >r4Y\"/j //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 tx|"v|&e2 RandomAccessFile oSavedFile; "ojD f3@{ long nPos;
J7
*G/F $S)e"Po~5 mn6p s6OB public FileAccessI() throws IOException 79c 9+ { x`=5l` this("",0); u{E^<fW] } b3 %& w'!}(Z5X? z*k3q`=> public FileAccessI(String sName,long nPos) throws IOException #`6OC)1J { -SC2Zgi)A oSavedFile = new RandomAccessFile(sName,"rw"); hF=V
?\ this.nPos = nPos; b$`4Nn| oSavedFile.seek(nPos); 4~pO>6P } w4<u@L %.atWX`b zm)CfEF
8 public synchronized int write(byte[] b,int nStart,int nLen) !i"9f_ { m?R+Z6c[ int n = -1; b09#+CH? try{ K~hlwjrt oSavedFile.write(b,nStart,nLen); H@&"M% n = nLen; I`n1M+=% } gQ+_&'C catch(IOException e) /wCxf5q0 { 3bI|X!j e.printStackTrace (); raI~BIfe } <&m 0 *Yivx6 @1qUC"Mg return n; cX=b q_ } ?$8 ,j+&I xzf)_ < B8#f^}8 } ])ZJ1QL1 :-'ri Ry CYic_rF$ /* Hd@T8 D*A **SiteInfoBean.java k3|9U'r!c */ ,vY
I
O package NetFox; qaSv]k. N@`9 ~JS Pc:'>,3!V3 public class SiteInfoBean { ljR?* P vR.6^q 1~ZHC[ ` private String sSiteURL; //Site's URL >a]
s private String sFilePath; //Saved File's Path k}a!lI: private String sFileName; //Saved File's Name 0BwQ!B. private int nSplitter; //Count of Splited Downloading File Zo6a_`)d "kuBjj2 b:d.Lf{y7 public SiteInfoBean() l[j0(T {//nSplitter的缺省值为5 R8Ei:f} //default value of nSplitter is 5 cngPc]?N this("","","",5); r3lr`s` } |`9zE] a+Qj[pS JG+o~tQC public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)
!{=%l+^. { ON=ley sSiteURL= sURL; sN/Xofh sFilePath = sPath; =|zyi| sFileName = sName; HDG"a&$
this.nSplitter = nSpiltter; 8{^GC(W{] 7.'j~hJL Z"&ODVP } ~bQ:gArk @?NLME 0
#;
s{7k public String getSSiteURL() .:Xe* Q { jtC ob'n8 return sSiteURL;
jS)-COk } 2MrR|hLx -BH'.9uqGQ 3gXUfv2ID public void setSSiteURL(String value) ag4^y& { 3]82gZGG sSiteURL = value; dKG<" } ({62GWnn_ T>?1+mruM SQCuY<mD public String getSFilePath() oO,p.X% { K_Gf\x return sFilePath; E 4(muhY } l1j eNKdub e
q.aN3KB" public void setSFilePath(String value) P=i |{vv( { G4]`` sFilePath = value; >@\-m } SQRz8,sqkw 1%{(?uz9 !S<~(Ujyw public String getSFileName() cA^7}}?e { z#!Cg*K( return sFileName; lKSI5d } e6/} M3B ;<Q_4
V N($]))~3& public void setSFileName(String value) vdM\scO: { j|w+=A1 sFileName = value; A) .AAr } Gj0NN: 2Ki/K( q3:'
69 public int getNSplitter() sRG3`>1 { ;W"[,#2TM return nSplitter; IT"jtV } @5ybBh] [O'p&j@ Melc-[ public void setNSplitter(int nCount) we?#)9Q< { Uh}yHD`K nSplitter = nCount; %;gWl1&5 } YEj U3^@ } >skS`/6 )<&QcO_ AE Jm/8,T /* 5sUnEHN **Utility.java bL%)k61G_v */ }2{#=Elh package NetFox; c`Cn9bX bf+2c6_BN0 V-|}.kOH2 public class Utility { ,%^0 4sl %Z|*!A+wN5 x(~l[hT public Utility() }#M|3h;q9+ { R&A.F+Zgt Z5K,y19/~ vYkoh/(/u } r+crE %- .nJGxz+X" //线程睡眠 d0d2QRX public static void sleep(int nSecond) <o
O_wS@: { FS0SGBo try{ rjzRH Thread.sleep(nSecond); *np|PyLP: } :KwYuwYS catch(Exception e) >E# 4mm { Wj0([n e.printStackTrace (); l0f6L xfz } XR(kR{yo } h";sQ'us 191)JWfa //日志 _'Z@ < ,L public static void log(String sMsg) S6uBk"V! { 4T"P#)z System.err.println(sMsg); x.I-z@\E } Wk?XlCj A'T! og|5 Sk xaSJ" public static void log(int sMsg) FK>rc3 q { d?JVB System.err.println(sMsg); OLq/OO,w } 8oK30? } '" 6VfF)* %O-wMl H)Yv_gT /* ouujd~b+ **TestMethod.java ^(y4]yZ */ ]M.ufbg uq package NetFox; zPn8>J<.0Q };|'8'5 ^(%>U!<<%, public class TestMethod { (q
utgnW z[B7k%} -<.>jX public TestMethod() !HFwQGP.Y { ///xx/weblogic60b2_win.exe =d9%ce try{ x9a0J1Nb-h SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fYpy5vc-dm //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); umc!KOkL SiteFileFetch fileFetch = new SiteFileFetch(bean); @E1N9 S?> fileFetch.start(); g\2Y605DM } ,ua]h8 catch(Exception e){e.printStackTrace ();} Zu!3RN[lp? U^.$k-|k ZC05^ } nRvV+F0# 27)$;1MT: #+XKfumLk public static void main(String[] args) ],#9L
{ {aU~[5L3( new TestMethod(); 3?C$Tl2G8 } 'kp:yI7w } <w[)T`4N 点击下载更多相关资料
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