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/* ~#pQWa5 **SiteFileFetch.java ]?-8[v~{C */ [y&yy|*\ package NetFox; aF]4%E import java.io.*; w<*6pPy import java.net.*; +VCG/J #px74EeI\ y)C nH4{ public class SiteFileFetch extends Thread { H0LEK(K T2Ms/1FH/@ :bNqK0[rS SiteInfoBean siteInfoBean = null; //文件信息Bean Pq KbG<}Y long[] nStartPos; //开始位置 V*Ta[)E long[] nEndPos; //结束位置 s\@RJ[(<
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Mj2`p#5wKh long nFileLength; //文件长度 lhZXq!2p boolean bFirst = true; //是否第一次取文件 Eg$ I boolean bStop = false; //停止标志 GHaD32 File tmpFile; //文件下载的临时信息
_xjw: DataOutputStream output; //输出到文件的输出流 ~M _@_ a9}7K/Y=d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h/?$~OD public SiteFileFetch(SiteInfoBean bean) throws IOException I($0&Y\De { *6IytWOX5 siteInfoBean = bean; 8Q d *OO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o9*}>J<+RQ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 6QO[!^lY if(tmpFile.exists ()) leR-oeSO { 'I^3r~_ bFirst = false; pMndyuoJl read_nPos(); BE>^;` K } # 3UrGom else 3k3-Ts { /Ps/m! nStartPos = new long[bean.getNSplitter()]; }Vjg>" nEndPos = new long[bean.getNSplitter()]; @{n"/6t } HQGn[7JW RrA9@95+ O*jTrZ(k R2,Z`I } wIeF(}VM /u?ZwoTzY v,,
.2UR4 public void run() ,yf2kU { g6aIS^mU //获得文件长度 OYW:I1K<5 //分割文件 &UrPb%=2H //实例FileSplitterFetch %La<] //启动FileSplitterFetch线程 :O)\+s- //等待子线程返回 q#D-}R_RN try{ BRSIg] if(bFirst) inQ1$ { %j $r" nFileLength = getFileSize(); ]"q9 ~ if(nFileLength == -1) Z #uxa { (r*"}"ZG System.err.println("File Length is not known!"); HV2 1=W } KJ (|skO else if(nFileLength == -2) 8=TM _ { W2>VgMR [ System.err.println("File is not access!"); }B1f_T } D`c&Q4$: else AcHr X=O { aoqG*qh}b for(int i=0;i<nStartPos.length;i++) =Vie0TV&h { \0j-p nStartPos = (long)(i*(nFileLength/nStartPos.length)); T:/mk`> } H^sImIEUT for(int i=0;i<nEndPos.length-1;i++) BcXPgM!Xqz { pgUp1goAU nEndPos = nStartPos[i+1]; yjE$o?A } emT/5'y nEndPos[nEndPos.length-1] = nFileLength; >dK# tsp } S/,)X } ?*AhGza/ 6K7DZ96L unvS `>)Np //启动子线程 K&4FFZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Wr+/9 for(int i=0;i<nStartPos.length;i++) .RW&=1D6 { z"%{SI^ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eL" +_lW siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), @oKW$\ nStartPos,nEndPos,i); p!/!ZIo Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); um,G^R fileSplitterFetch.start(); ^vw[z2" } M!R=&a=Z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0<FT=tKm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); EQ [K // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", j82x$I* nEndPos = " + nFileLength); `a6AES'w$ // fileSplitterFetch[nPos.length-1].start(); R :*1Y\o( g|Tkl */'j[uj
//等待子线程结束 `c)[aP{vN //int count = 0; 9y}/ G //是否结束while循环 J7pF*2 boolean breakWhile = false; ]xxE_B7 FJD;LpW :@4+ } while(!bStop) {F=`IE3)w { ~F"w write_nPos(); kD46Le++B Utility.sleep(500); Cu!S|Xj. breakWhile = true; .^xQtnq lJ
Jn@A @6kkt~>: for(int i=0;i<nStartPos.length;i++) +[Izz~_p { uOAd$;h@_Z if(!fileSplitterFetch.bDownOver) kO/YO)g { )mH(Hx breakWhile = false; GJ\bZ"vDo break; 8b"vXNB.f } ':|E$@$W } ,`!>.E. if(breakWhile) \E1CQP- break; nxJx 8d" f5z*AeI 2)Q%lEm`SP //count++; ;TKsAU //if(count>4) 2WS Wfh // siteStop(); X`C ozyYuD } ;w;+<Rd $}EI3a >~O/ZDu/@ System.err.println("文件下载结束!"); /%F5u}eW } siOyp] catch(Exception e){e.printStackTrace ();} XnKf<|j6k } [:/mjO K ky{@*fg. 1()pKBHf //获得文件长度 T"e"?JSRJ public long getFileSize() +^q-v- { 8&:dzS int nFileLength = -1; V#+M lN try{ _D{{C URL url = new URL(siteInfoBean.getSSiteURL()); %_(^BZd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); B A
i ^t httpConnection.setRequestProperty("User-Agent","NetFox"); Lh-+i Tdxc%'l )_kU,RvZ int responseCode=httpConnection.getResponseCode(); m'KEN<)s if(responseCode>=400) ll
^I;o0 { RgD:"zeM processErrorCode(responseCode); XzW\p8D^u return -2; //-2 represent access is error D1V^DbUm_ } ;ykX]5jGh bSW~hyI w "`V:4uz String sHeader; zUA
- #[]B:
n6 K8uqLSP ' for(int i=1;;i++) 6RfS_ { _6`H`zept //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +.a->SZ5" //Utility.log(in.readLine()); :n OCs sHeader=httpConnection.getHeaderFieldKey(i); g6h=Q3@ if(sHeader!=null) ;y;UgwAM { l]L"Ex{ if(sHeader.equals("Content-Length")) $ VeQvm* { !]MGIh#u nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &S[>*+}{+ break; z
J V>; } +;a\
gF^ } au+a7~0~ else lT8^BT break; /BrbP7 } ;It1i`!R } ahR-^^'$ catch(IOException e){e.printStackTrace ();} ,Qt2 ? catch(Exception e){e.printStackTrace ();} wc ;^C?PX IIAm"=* Y+C6+I<3 Utility.log(nFileLength); ([NS% &g!yRvM!;Q p@3 <{kLm return nFileLength; } DjbVYH } .G>6_n3 &ZJ$V wx^1lC2 //保存下载信息(文件指针位置) Sr-!-eC private void write_nPos() T9AFL;1 { [ak[ZXC, try{ mpzm6Ieu output = new DataOutputStream(new FileOutputStream(tmpFile)); (wp?tMN5# output.writeInt(nStartPos.length); bKQ-PM&I/t for(int i=0;i<nStartPos.length;i++) mW#p&{ { `<?((l%;R // output.writeLong(nPos); ~Dj_N$_+9 output.writeLong(fileSplitterFetch.nStartPos); Lmc"qFzK output.writeLong(fileSplitterFetch.nEndPos); lmx'w } {WuUzq` output.close(); u:>*~$f
} ?e hUGvV2 catch(IOException e){e.printStackTrace ();} ~t^'4"K* catch(Exception e){e.printStackTrace ();} y<)q;fI7 } )C>M74Bt cC$E"m `3vt.b //读取保存的下载信息(文件指针位置) R-5e9vyS private void read_nPos() /&RS+By(i { XtIY8wsP try{ 6S?*z
`v DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); (oB9$Zz!t int nCount = input.readInt(); mg
*kB:p nStartPos = new long[nCount]; #.<(/D+ nEndPos = new long[nCount]; AeEF/* for(int i=0;i<nStartPos.length;i++) Es+BV+x[.c { M!iYj+nrP nStartPos = input.readLong(); 88+J(^y> nEndPos = input.readLong(); r%II`
i } Cc` )P>L input.close(); Q46sPMH+_ } Q".AmHn
catch(IOException e){e.printStackTrace ();}
MU~nvs;: catch(Exception e){e.printStackTrace ();} FhMl+Ou
} I@YX-@&7 ^4tz*i K[i|OZWu private void processErrorCode(int nErrorCode) nNcmL/( { u/4|Akui System.err.println("Error Code : " + nErrorCode); zbP#y~[ } /N`E4bKBR xkkW?[& z*&r@P
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//停止文件下载 OEs! H]v public void siteStop() g}'(V>( { fu7J{-<<R bStop = true; 0V?:5r< for(int i=0;i<nStartPos.length;i++) -_~T;cj6 fileSplitterFetch.splitterStop(); t5 #'Lt_Yf! X"
;ly0Mb } 44_CT?t< } .p(~/MnO //负责部分文件的抓取 ceGo:Aa<) **FileSplitterFetch.java JS! */ +vCW${U package NetFox; [&p^h x 0x/2re } T1~fa import java.io.*; $,B@yiie import java.net.*; "K-2y^Dl w7X], auRC |.[4$C public class FileSplitterFetch extends Thread { #[ hJm'G a
|+q:g0M kDr0D$iE String sURL; //File URL i:,37INMt long nStartPos; //File Snippet Start Position "6fTZ< long nEndPos; //File Snippet End Position `)s>},8W! int nThreadID; //Thread's ID `Hq)g1a7q boolean bDownOver = false; //Downing is over }mSfg boolean bStop = false; //Stop identical 3QzHQU FileAccessI fileAccessI = null; //File Access interface oyY0!w,Y ~85Pgb< e{33%5 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QH_I<Y:n { 5\$8"/H this.sURL = sURL; nyR4E}@:O this.nStartPos = nStart; 7ezf.[{R this.nEndPos = nEnd; B0}f,J\ nThreadID = id;
mH*6Q> fileAccessI = new FileAccessI(sName,nStartPos);//定位 #35@YMF } 6dq*ncNin QGV~Y+ ?$LKn2C public void run() y #Xq@ { |lhVk\X while(nStartPos < nEndPos && !bStop) Qs.g% { -l`1j6 V_"K ?H_'L4Wv try{ _P*<T6\J> URL url = new URL(sURL); R)?zL;,x HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); uM<6][^` httpConnection.setRequestProperty("User-Agent","NetFox"); #D&]5"0cX String sProperty = "bytes="+nStartPos+"-"; Ii9@ j1-g httpConnection.setRequestProperty("RANGE",sProperty); )pAN_e" Utility.log(sProperty); yPqZ , 9@."Y>1G +aWI"d--h InputStream input = httpConnection.getInputStream(); 4_w+NI,; //logResponseHead(httpConnection); &18CCp\3)c __,1;= :D'#CoBA byte[] b = new byte[1024]; +B#3! int nRead; Q}MS $[y while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Ll
!J!{ { F!;0eS"xp nStartPos += fileAccessI.write(b,0,nRead); A+lP]Oy0S //if(nThreadID == 1) 9ZEF%&58Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); //}[(9b'\ } O8N\ Xbb('MoI63 1>SCY_Cv Utility.log("Thread " + nThreadID + " is over!"); ~"+Fp&[9f bDownOver = true; *M_Gu{xc //nPos = fileAccessI.write (b,0,nRead); 1MCHwX3/ } j&.MT@ catch(Exception e){e.printStackTrace ();} FaNH+LPe } )TBG-<wt } \e/'d~F 9j[%Y? /v1Rn*VF! //打印回应的头信息 D$RQD{* public void logResponseHead(HttpURLConnection con) 9
1r"-%(r { 4u
zyU_ for(int i=1;;i++) uwl;(zwh_ { G2%%$7Jj String header=con.getHeaderFieldKey(i); 1Yy5bg6+E if(header!=null) E(e'qL //responseHeaders.put(header,httpConnection.getHeaderField(header)); iG1vy'J#o Utility.log(header+" : "+con.getHeaderField(header)); ncluA~ 8 else /?jAG3" break; J['paHSF } &\$l%icuo } &r6VF/ ~ (xIG s|U?{Byb! public void splitterStop() MEQ:[;1 { XQu~/{A= bStop = true; fL8+J]6A6 } p*rBT,' pNo<:p 05\A7.iy } vmW4 3K; <aR8fU ;K:)R_H /* 4425,AR **FileAccess.java i51~/
R *//文件访问(定位,写) &P%3'c}G package NetFox; vv
_I o import java.io.*; 1FS Jqad \k1psqw^O "qRE1j@%a public class FileAccessI implements Serializable{ T1pA
<6 9d4PH //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 dlC)&Ai RandomAccessFile oSavedFile; zLlu%Oc long nPos; M?4)U"_VE 9}FWO&LiB 3y%B&W,sm public FileAccessI() throws IOException c,1Yxg]| { ? Ovl(4VG this("",0); cbl2D5s+i] } 1pC!F ;9Oo M* (]hu0! Bl-nS{9" public FileAccessI(String sName,long nPos) throws IOException }"<|.[V) { tt`j!! oSavedFile = new RandomAccessFile(sName,"rw"); _-%A_5lCRE this.nPos = nPos; A
e&t#,) oSavedFile.seek(nPos); [0D( PV(n } pq6}q($Rk [Z484dS`_ s#ijpc>h public synchronized int write(byte[] b,int nStart,int nLen) 9cAb\5c| { ,
e{kC int n = -1; c~(+#a try{ N %-Cp) oSavedFile.write(b,nStart,nLen); r>S?,qr n = nLen; KvC`6 } A('=P}I^ catch(IOException e) ?yF)tF+< { wAxXK94#3 e.printStackTrace (); D;It0" } -cCujDM#T
"w0> }\`MXh's return n; w} *;^n }
(bi}?V* @^:R1c![s uh3%}2'P } G}CzeLw \~1M\gZP w:
~66 TCI /* q_5k2'4K **SiteInfoBean.java 6)m}e?D> */ t5#IiPp package NetFox; o`HZS|>K* IpmblC4 >v @R]9 public class SiteInfoBean { wxXp(o( S1{UVkr PD12gUU? private String sSiteURL; //Site's URL 1FUadSB5) private String sFilePath; //Saved File's Path HcA;'L?Dw private String sFileName; //Saved File's Name
9@
6y(#s private int nSplitter; //Count of Splited Downloading File )_OKw?Zi bE.,)GY NyI0[]z public SiteInfoBean() j`A%(()d {//nSplitter的缺省值为5 s<[%76Y! //default value of nSplitter is 5 (,`ypD +3q this("","","",5); zlZ$t{[, } ^$SI5WK&) *VH!<k[n fn
)m$\2 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .v%H%z~Rl# { sPn[FuT>+s sSiteURL= sURL; EA9`-xs| sFilePath = sPath; Eym<DPu$n sFileName = sName; hm >JBc:n- this.nSplitter = nSpiltter; `uy)][j- ulV)X/]1 xz5 Jli } jXkz,]Iy F6R+E;"4R' 5\}A8Ng public String getSSiteURL() -! Hn,93 { $-m@cObw!. return sSiteURL; \];0S4SBy } V #W,}+_Sz $Zp\^cIE+ z9pv| public void setSSiteURL(String value) blNJ { )#zc$D^U sSiteURL = value; ~~k_A|& } rvuskXdo xal+buOiP z=B*s!G public String getSFilePath() $^?"/;8P5 { Ehu^_HZ return sFilePath; nIJ2*QJ } bB@1tp0+ 6lOT5C eJ" T1jAY^^I public void setSFilePath(String value) #L5H-6nz { R!b<Sg sFilePath = value; Yo3my>N&g } Cqy84!Z< ms8de>A|H C-lv=FJEk/ public String getSFileName() ;75K:_ { o<bZ. t return sFileName; /"?yB$s } E}Q'Wz|k m(SGE,("w ol7%$:S public void setSFileName(String value) hRTw8-wy: { w%R(*,r6 sFileName = value; A@xa$!4} } os0fwv HpY-7QTPJ~ 3:Q5dr+1_ public int getNSplitter() ;rZR9fR { OjTb2[Q return nSplitter; |l)SX\Qf`@ } _SdO}AiG HZC^Q7]hy ~``oKiPg@ public void setNSplitter(int nCount) +U{8Mj { 6U5L>sQ nSplitter = nCount; RhR{EO } PNY"Lqj } V:HxRMF2X @ -CZa^g wb~BY /* [AkL6 **Utility.java V
.+ mK|) */ 4H'\nsM package NetFox; x9Um4!/t l# u$w& I^S
gWC public class Utility { 0'q&7
MV E{x<P0 ; vYb.Ub+ public Utility() D*.U? { k?]`PUrV bQd'objpY .kKU MyW( } tNP>6F/
+l'l*< //线程睡眠 ]S!:p>R public static void sleep(int nSecond) M ,!Dhuas { 7L3:d7=MIW try{ [`pp[J-~7 Thread.sleep(nSecond); sZ,xbfZby } }#%3y&7M7 catch(Exception e) A$d)xq-]K { *} @Y"y e.printStackTrace (); Wk<he F } Xc8r[dX } Lv;% z xE>H:YPm //日志 Y$JGpeq8w public static void log(String sMsg) 4z6i{n-k { N,k PR System.err.println(sMsg); xAJ
N(8? } 9~3;upWu! E%Tpby}^' 4-j3&( public static void log(int sMsg) })#VO-J { T($d3Nn1 System.err.println(sMsg); uBpnfIe } V9KI?}q:W } Hwb+@'o 1M@OBfB8 VZveNz@]r /* zD}@QoB **TestMethod.java X=C*PWa7 */ 8w4-Ud*$i package NetFox; T0HNld @nWhUH% /Z3 Mlm{ public class TestMethod { |!t&ZpdD >qE f991SZ au=A+ public TestMethod() [d"]AF[# { ///xx/weblogic60b2_win.exe XotiKCk|Aq try{ 6ijL+5 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); y5@#leM //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); hHA!.u4& SiteFileFetch fileFetch = new SiteFileFetch(bean); 4Fu:ov
]M fileFetch.start(); h D5NX } ^Pwtu catch(Exception e){e.printStackTrace ();} TA4>12C6 5:R$xgc Zc!rL0T } DsJ ikg(J qb$&BZj]| T'^ Do/ public static void main(String[] args) ) |t;nK, { ]u5B]ZQnA new TestMethod(); 1`sLbPW } ztS:1\ } IL0e:-@!0 点击下载更多相关资料
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