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/* HU}7zK2 **SiteFileFetch.java '!cCMTj */ eKLZt%= package NetFox; UA0Bzoky; import java.io.*; 2K6qY)/_ import java.net.*; Yty/3T3)e 4 Y9`IgQ E *6Cw
l public class SiteFileFetch extends Thread { UWJ8amA B=T'5& Bz-c$me1 SiteInfoBean siteInfoBean = null; //文件信息Bean gNrjo= long[] nStartPos; //开始位置 $}q23 long[] nEndPos; //结束位置 T|op$ s| FileSplitterFetch[] fileSplitterFetch; //子线程对象 T_
<@..C long nFileLength; //文件长度 l^-];|Y
boolean bFirst = true; //是否第一次取文件 oUr66a/[U boolean bStop = false; //停止标志 v2\FA(BPn File tmpFile; //文件下载的临时信息 kGS;sB DataOutputStream output; //输出到文件的输出流 &|ex`nwc0 T#Z^s~7&I //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) w"|L:8 public SiteFileFetch(SiteInfoBean bean) throws IOException k[YS8g-Q { 8.=BaNU siteInfoBean = bean; S-b/S5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <C iSK! tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1~`fVg if(tmpFile.exists ()) @6sqMw} { 9c'xHO` bFirst = false; b<ZIWfs read_nPos(); OU.6bmWy| } Tc:)-
z[o else mh#a#< { mb3"U"ohs nStartPos = new long[bean.getNSplitter()]; |O+H[;TB6 nEndPos = new long[bean.getNSplitter()]; v^NIx q}U } F6|]4H.3Q D|p9qe5% eHZws`W $G+@_' } D%Sl AzZ3 0<@KG8@hI; q`a'gJx#y public void run() `25yE/ { MrFQ5:= //获得文件长度 3M7/?TMw{6 //分割文件 >Q;l(fdj //实例FileSplitterFetch W,n!3:7s //启动FileSplitterFetch线程
#A/ //等待子线程返回 8MtGlW%Eh try{ HM1Fz\Sf if(bFirst) ~jk|4`I?T { m?}6)\ob nFileLength = getFileSize(); o#Dk&
cH if(nFileLength == -1) 4.aZ#c91_ { + GN(Ug'R System.err.println("File Length is not known!"); s^9Voi.y } F~W6Bp^W else if(nFileLength == -2) 1n8/r}q'H { b. '-?Nn System.err.println("File is not access!"); &PHTpkaam } ksUcx4;a@F else ,w4(kcg%iQ { yx[/|nZDC4 for(int i=0;i<nStartPos.length;i++) 8kIksy { ec;o\erPG nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~,Ix0h+H+M } ^uc=f2=>, for(int i=0;i<nEndPos.length-1;i++) |>^JRx { \*?~Yj# nEndPos = nStartPos[i+1]; [|$h*YK } Q3~H{)[Kq nEndPos[nEndPos.length-1] = nFileLength; N>`Aw^ _@& } ;H*T^0 } K5h |wMN}bq|T (%6P0* //启动子线程 ="H`V V_ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; t3_O H^ for(int i=0;i<nStartPos.length;i++) !;A\.~-!G { T7%S
#0,p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H*R"ntI?w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]_gU#,8
nStartPos,nEndPos,i); uGG t\.$]s Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .`eN8Dl1 fileSplitterFetch.start(); Rhs/3O8k } + &Eqk // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +O{*M9B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); LEdh!</'24 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Yj49t_$b nEndPos = " + nFileLength); rM%1GPVob // fileSplitterFetch[nPos.length-1].start(); (L&d!$,Dv "KpGlY?^ =dKtV.L //等待子线程结束 va@Lz&sAE% //int count = 0; $UWZDD //是否结束while循环 gwMNYMI boolean breakWhile = false; ?fSG'\h> d#FQc18v}k a1lh-2xX while(!bStop) lymCH { g) jYFfGfH write_nPos(); ^09,"<@k Utility.sleep(500); 99QU3c<. breakWhile = true; TvbE2Q;/UL rV#ch( )y$(AJx$ for(int i=0;i<nStartPos.length;i++) ;.980+i1 { li.;IWb0+) if(!fileSplitterFetch.bDownOver) sO@Tf\d { g($2Dk_F2 breakWhile = false; O\r0bUPE break; sXPe/fWo } .ioEIs g } |CyE5i0 if(breakWhile) c^W)07-X5y break; j\M?~=*w %.|@]!C Gd85kY@w7 //count++; bk[!8-b/a //if(count>4) ym1Y4, // siteStop(); \9T7A& } 6'f;-2 SmO~,2= 0g8NHkM:2a System.err.println("文件下载结束!"); %pCTN P } +ZP7{% catch(Exception e){e.printStackTrace ();} eHUOU>&P] } (tW`=]z-< !4+<<(B=E dR]m8mdqc1 //获得文件长度 OjA,]Gv6 public long getFileSize() V0mn4sfs { C3g_!dUs int nFileLength = -1; )^hbsMhO try{ hhvyf^o URL url = new URL(siteInfoBean.getSSiteURL()); C0Z=~Q% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v3>UV8c' httpConnection.setRequestProperty("User-Agent","NetFox"); :ShT|n7 8&dF e\/w' int responseCode=httpConnection.getResponseCode(); owv[M6lbD if(responseCode>=400) F!K>K z { &K,i
f processErrorCode(responseCode); Vxt+]5X return -2; //-2 represent access is error uB?ZcF}Tk } )+Pus~w lp8v0e4 $ ocdI5 String sHeader; #g!.T g' />>\IR `Q,H|hp;k; for(int i=1;;i++) q5S9C%b { aw> #P //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %&bY]w //Utility.log(in.readLine()); d/@,@8: sHeader=httpConnection.getHeaderFieldKey(i); sDV Q#}a if(sHeader!=null) hE-M$LmN@ { 7 X4LJf if(sHeader.equals("Content-Length")) 1h5 Akq { apxph2yvS nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); e96k{C`j0 break; ^<AwG= } }ad|g6i` } (7*}-Uy[C else v &+R^iLE break; $ME)#( } /a o5FL } ~Cjn7 catch(IOException e){e.printStackTrace ();} {(}By/_ catch(Exception e){e.printStackTrace ();} u#SWj,X ?bu>r=oIO] Wm5dk9&x Utility.log(nFileLength); ct}9i"H#1 Y6d@h? ht {VoHh_[5% return nFileLength; Y
nZiTe@ } `9.r`&T6K ReeH@.74 _J [P[(ab //保存下载信息(文件指针位置) po7q mLq private void write_nPos() cCc(fF*^ { FxtI"g\0 try{ 5/z/>D; output = new DataOutputStream(new FileOutputStream(tmpFile)); !{41!O,K# output.writeInt(nStartPos.length); t&DEb_"De for(int i=0;i<nStartPos.length;i++) &jr3B;g!C { -|\ZrE_h // output.writeLong(nPos); ;jTN| i' output.writeLong(fileSplitterFetch.nStartPos); Ecx<OTo output.writeLong(fileSplitterFetch.nEndPos); {FTqu. } HUO j0T output.close(); C{wEzM: } pY$Q catch(IOException e){e.printStackTrace ();} n{SJ_S#a.a catch(Exception e){e.printStackTrace ();} [PKR2UEe] } 2dgd~
D|#E9OQzs YT8F#t8 //读取保存的下载信息(文件指针位置) Pr,q*_Yy private void read_nPos() W+1^4::+ { R_xRp&5 try{ XBw)H DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Vs{|xG7WD int nCount = input.readInt(); %;"y+YFdv nStartPos = new long[nCount]; Oz#{S:24M+ nEndPos = new long[nCount]; o,3a4nH; for(int i=0;i<nStartPos.length;i++) sFTy(A/ { {cw /!B nStartPos = input.readLong(); qb` \)X]9 nEndPos = input.readLong(); eQvg7aO; } rk)`\=No input.close(); e64 ^ChCoV } ##4HYQ%E catch(IOException e){e.printStackTrace ();} N$:8,9.z catch(Exception e){e.printStackTrace ();} -RK- Fu<e } @gXx1hEg XHGFf_kW_N 5.J.RE"M private void processErrorCode(int nErrorCode) MR.'t9m2L { 63x?MY6 System.err.println("Error Code : " + nErrorCode); ;mKb] } ZWp(GC1NA >~+ELVB& 8|58 H //停止文件下载 VTHH&$ZNq public void siteStop() g95`.V} { U_c *6CK bStop = true; 2SR: FUV/ for(int i=0;i<nStartPos.length;i++) I[X772K fileSplitterFetch.splitterStop(); 3%=~)7cF ('p5:d 8BNi1Qn$ } K@w{"7} } m/EFHS49 //负责部分文件的抓取 0% I=d **FileSplitterFetch.java V,N%;iB} */ 4x[S\,20 package NetFox; ~gRf:VXX=_ x`)&J
B @bP)406p import java.io.*; 2WYPO"q import java.net.*; ~z;FP$U C'}KTXiRW zjoq6 public class FileSplitterFetch extends Thread { "AGLVp.zT *<ewS8f*6 Alw3\_X String sURL; //File URL cDH^\-z long nStartPos; //File Snippet Start Position l0A&9g*l2 long nEndPos; //File Snippet End Position 2x0<&Xy#P int nThreadID; //Thread's ID <B8!.|19 boolean bDownOver = false; //Downing is over 1c{DY boolean bStop = false; //Stop identical OX\F~+ FileAccessI fileAccessI = null; //File Access interface dL
)<%
o b(O3@Q6[ `$aZ0+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException V[vl!XM { 8StgsM this.sURL = sURL; N7R!C)!IL this.nStartPos = nStart; ChXq4] this.nEndPos = nEnd; >[=^_8M nThreadID = id; 9|CN8x- fileAccessI = new FileAccessI(sName,nStartPos);//定位 )gy!GK } PdtvU-( 55c|O U2s /2 [. public void run() |64~K\X { ** G9H while(nStartPos < nEndPos && !bStop) F;0}x;:> { aM0f/"-_ dQR-H7U >%8KK|V{ try{ qVwIo.g! URL url = new URL(sURL);
3]3| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ..'_o~Ka httpConnection.setRequestProperty("User-Agent","NetFox"); ':m,)G5& String sProperty = "bytes="+nStartPos+"-"; FZE"7ec>m httpConnection.setRequestProperty("RANGE",sProperty); Y,t={HiclX Utility.log(sProperty); gi
_ 5?$ nq8C'Fo!6T V~;1IQd{ InputStream input = httpConnection.getInputStream(); *U=s\ //logResponseHead(httpConnection); k4y'b -"60d
@. !LN?PKJ byte[] b = new byte[1024]; 6- B|Y3)B int nRead; d;9FB[MmOJ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R)ITy!z { t+T4-1 3a nStartPos += fileAccessI.write(b,0,nRead); /9pwZ%:< //if(nThreadID == 1) Ob`d // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JKmIvZ)8 } q0r>2c-d )6,=f.% mahJSz(3 Utility.log("Thread " + nThreadID + " is over!"); 9=h'9Wo bDownOver = true; @Y<bwv //nPos = fileAccessI.write (b,0,nRead); A='N=^Pm } !SdSE^lz` catch(Exception e){e.printStackTrace ();} @?
QoF#D } 9}F*P669f } .NC:;@y aa#Y=%^ fnX`Q[b4\A //打印回应的头信息 .ndCfdy~ public void logResponseHead(HttpURLConnection con) .|b$NM { *>2W#D)b= for(int i=1;;i++)
+:!7L=N# { ]cZ!y
~ String header=con.getHeaderFieldKey(i); F{~{Lthc if(header!=null) Xi,CV[L\ //responseHeaders.put(header,httpConnection.getHeaderField(header)); %Iv,@}kvT+ Utility.log(header+" : "+con.getHeaderField(header)); BB*f4z$Y% else ;=;
9tX break; vyX\'r.~7 } SVs_dG$ } 7k9G(i[-+ q?DTMKx s ;oQS5Y public void splitterStop() Y^7$t^& { $oU*9}}Rn bStop = true; vV6I0 } _%!c+f7 6dN7_v) ?DQsc9y } XJ` ]ga TKY*`?ct 9~mh@Kgv /* Q$1bWUS& **FileAccess.java ?:8ido#- *//文件访问(定位,写) y7
3VFb package NetFox; uRRQyZ import java.io.*; V#t%/l )ufg9"\ 9N<<{rQ,F public class FileAccessI implements Serializable{ 1[qLA!+ o(
RG-$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 =K{"{5Wb RandomAccessFile oSavedFile; L,`Lggq- long nPos; qnJt5 FsV'Cu@!U 36%nB* public FileAccessI() throws IOException &7b|4a8B% { 6c"0})p this("",0); 28H8l2{[> } $8xl#SqH *4xat:@{{ V\6[}J public FileAccessI(String sName,long nPos) throws IOException &8>IeK{I { YN2sdG oSavedFile = new RandomAccessFile(sName,"rw"); KgOqbSJ this.nPos = nPos; W?aI|U1 oSavedFile.seek(nPos); Xr2ou5zAn } 4.h=&jz&
,
GY h9 jbu8~\" public synchronized int write(byte[] b,int nStart,int nLen) |8=nL$u { fX.>9H[w@~ int n = -1; 2viM)+ try{ {Jx4xpvPo oSavedFile.write(b,nStart,nLen); x2z;6) n = nLen; kc @[9eV } W#BM(I catch(IOException e) Y$Y_fjd_ { {%{`l- e.printStackTrace (); CkD#/
} }!/$M\w Eam a,+@|TJ,i return n; .I'o } 92d6U2T4& IS[thbzkZ wUQw!%?> } UkHY[M7; pT1[<X!<s ~J8pnTY /* &jczO-R^ **SiteInfoBean.java C,NxE5?h */ J.dLPKU;- package NetFox; d/|D<Sb[s ;VNMD 6H 4e;yG> public class SiteInfoBean { 'GoZqiYT
MR,R}B$ HJ[/|NZU$ private String sSiteURL; //Site's URL Cc<,z*T private String sFilePath; //Saved File's Path T<@ cd|` private String sFileName; //Saved File's Name M=*bh5t%] private int nSplitter; //Count of Splited Downloading File |'+eMl RJH, {W~q
z^>u4 public SiteInfoBean() xD /9F18 {//nSplitter的缺省值为5 !>`N$-U X //default value of nSplitter is 5 |*Yf.- this("","","",5); ND,Kldji } uy^ f\1A!Yp E)-r+ <l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Q33"u/-v { ;k86"W sSiteURL= sURL; qdG~!h7j sFilePath = sPath; Za7q$7F7Bc sFileName = sName;
kWb2F7m this.nSplitter = nSpiltter;
|R@~-Ht 8W+gl=C~ d:q + } F3lw@b3]) IU]^&e9u 9W>Y#V~|v! public String getSSiteURL() s (LT { -MugnB6
return sSiteURL; Rek
-`ki5F } q$.{j"cZV 8; R| <U9/InN0[ public void setSSiteURL(String value) A[dvEb;r { 1?Aga,~k:a sSiteURL = value; &G >(9 } ia{c dj&}Gedy >x@P|\ public String getSFilePath() m&0"<V!H/B { W*:,m8wk return sFilePath; Q2%QLM:., } 3PUAH RF!1oZ rf9_eP public void setSFilePath(String value) w$5A|%Y+V} { zggB$5 sFilePath = value; }2r+%V&4 } wVA|!>v l
n}}5Q jSQ9.%4 public String getSFileName() v)kEyX'K2d { F{\gc|!i return sFileName; iG,t_?? } 8g7,2f/ } 68'>Zbelb Qc{RaMwD public void setSFileName(String value) w*w?S { w[Ep*-yeI sFileName = value; I#FF*@oeM } z&$/EP- 6vf\R*D|A =S]a&*M public int getNSplitter() l t]B#, ' { bT!($?GNdg return nSplitter; VzRx%j/i } [{<dbW\ 9 M_D6i%b^ )yb+M ez public void setNSplitter(int nCount) ;<G<1+ { 4DO/rtkVq nSplitter = nCount; Lg`Jp&Kg } g.#+z'l } g>7Y~_} =ziy`#fm, qMS}t3X /* K2/E#}/ **Utility.java jlKGXD)Q[ */ 4W\,y_Q o package NetFox; .1*DR]^` ke.7Zp2.R f'dK73Xof public class Utility { s"0b%0?A ~j,TVY 0v"&G<J public Utility() h[ 6hM^n {
A@$fb}CF ZZ
A.a DB&SOe } Q59/ex c%YDt` //线程睡眠 2A$0CUMb public static void sleep(int nSecond) o G_~3Kt { 2Yyb#Ow try{ NR/-m7#- Thread.sleep(nSecond); bBE^^9G=Z } S+*cbA{J| catch(Exception e) 'rV2Bt, { .wFU:y4r e.printStackTrace (); *=^[VV! } K
M]Wl_z } ~{
.,8jE eECj_eH- //日志 wd`R4CKhP] public static void log(String sMsg) 7L{li-crI { S.fXHtSx System.err.println(sMsg); E0bFx5e5fu } k`IrZHMw pB'x_z )b9I@)C public static void log(int sMsg) RUrymkHFB { 5~yb
~0 System.err.println(sMsg); A[Cg/
+Z } anZIB } EC dfLn *c ag/u8 /2:Q6J /* v =+k"gm6 **TestMethod.java 7dhn'TW */ c20|Cx2m package NetFox; qi[(*bFK7 xucIjPi] l_sg)Vr/b public class TestMethod { ?lG;,,jc,W 4O Zy&, }`@?X"r public TestMethod() gx&7 3f<J { ///xx/weblogic60b2_win.exe $pBr
&, try{ tYI]=: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); G\IocZ3Gz //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QW:Z[?39^ SiteFileFetch fileFetch = new SiteFileFetch(bean); D1~^\)* fileFetch.start(); R^?PAHE7 } v*gLNB,ZH catch(Exception e){e.printStackTrace ();} $@4e(Zrmo n=SzF(S[M Ty iU1, oO } z7$}#)Z7 K+t];( DwC@"i. public static void main(String[] args) HO G=c!b { A9.;>8!u new TestMethod(); |7Yvq%E } Fj48quW1\P } v,@E}F~-f1 点击下载更多相关资料
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