-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* ,>-Q# **SiteFileFetch.java rTJv>Jjld */ _H#l&bL@C package NetFox; -OLXR c= import java.io.*; SZ+<0Y| import java.net.*; }Ip"j]h gemjLuf ~r~~0|= public class SiteFileFetch extends Thread { Bsm>^zZ`YU JM8s]& @&f3zq SiteInfoBean siteInfoBean = null; //文件信息Bean BV=L.* long[] nStartPos; //开始位置 k^A Yg!~ long[] nEndPos; //结束位置 Y~=]RCg FileSplitterFetch[] fileSplitterFetch; //子线程对象 g=?KpI-pn0 long nFileLength; //文件长度 )3i}(h0 boolean bFirst = true; //是否第一次取文件 r.e,!B s boolean bStop = false; //停止标志 o6e6Jw File tmpFile; //文件下载的临时信息 PPCZT3c= DataOutputStream output; //输出到文件的输出流 }`/wj @Yua%n6]#D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,j~R ^j public SiteFileFetch(SiteInfoBean bean) throws IOException tMaJ; 4 { H~~I6D{8 siteInfoBean = bean; qlUYu"`i //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +NRn>1] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ZIAiVq2) if(tmpFile.exists ()) {aq\sf;i{ { G+=6]0HT bFirst = false; 5* 1wQlL read_nPos(); ~Z5?\a2Ld } NF=FbvNe else 1Oo^ { d#T8|#O" nStartPos = new long[bean.getNSplitter()]; pt8X.f,iA nEndPos = new long[bean.getNSplitter()]; r;w_B%9 } YgaJ*%\ 8eP2B281 uK]@!gz o}5:vi] } {xt<`_R
1W;3pN
(H9%a-3 public void run() @M4~,O6- { ,TU!W|($ //获得文件长度 sTqy-^e7 //分割文件 32:,g4!~6 //实例FileSplitterFetch bWv6gOPR3 //启动FileSplitterFetch线程 qce# //等待子线程返回 l1c&a[M) try{ xy$FS0u if(bFirst) ^e8R43w:! { "}K/ b nFileLength = getFileSize(); UA,&0.7 if(nFileLength == -1) ?w#
>Cs( {
wB5zp System.err.println("File Length is not known!"); oKt<s+r } UVu"meZX else if(nFileLength == -2) *wp'`3y} { N(&FATZUW System.err.println("File is not access!"); 4PiN Q'* } T-&CAD3 ,O else 2x e_Q70II { OJ UM Y<5 for(int i=0;i<nStartPos.length;i++) EhB9M!Y`@ { G !1- 20 nStartPos = (long)(i*(nFileLength/nStartPos.length)); }(E6:h;}~ } ~J<bwF for(int i=0;i<nEndPos.length-1;i++) wt2S[:!p { o9wg<LP nEndPos = nStartPos[i+1]; Z55,S=i } *BXtE8
BU nEndPos[nEndPos.length-1] = nFileLength; @hzQk~Gdi } T|.Q81.NE } ? |8&!F ";s5It
YGWb!|Z$ //启动子线程 X""'}X|O fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2Fx<QRz for(int i=0;i<nStartPos.length;i++) =_":Z!_ { Y ga}8DU fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), LOnhFX
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2 )j\Lg_M nStartPos,nEndPos,i); 1r~lh#_8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {Y/|7Cl0 fileSplitterFetch.start(); 3]N}k|lb% } c6c^9*,V // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~7 `x9MUc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~|uCZ.;o // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", $,aU"'D nEndPos = " + nFileLength); fykN\b // fileSplitterFetch[nPos.length-1].start(); ,6M-xSDs g~B@=R w:Lu //等待子线程结束 h.?[1hT4R //int count = 0; /t>o
- //是否结束while循环 UkqLLzL boolean breakWhile = false; LV]\{' a^=4'.ok tjd"05"@: while(!bStop) 6\TstY3 { Nb];LCx write_nPos(); .oK7E(Q J Utility.sleep(500); 8PEOi breakWhile = true; cEqh|Q <rC#1wR4 i;xg[e8. for(int i=0;i<nStartPos.length;i++) x.^vWka( { RChY+3,L) if(!fileSplitterFetch.bDownOver) 6sZRR{' { 9~; Ju^b breakWhile = false; .|aSGvE break; L3GJq{t } GDcV1$NA } 6AwnmGL(;; if(breakWhile) }w-`J5Eq# break; WuNu}Ibl}m h7y*2:l6 DA
wzXsx //count++; <+$S{Z. //if(count>4) &*yve}su // siteStop(); uc<@
Fh( } 7 %|>7 ZF
t^q/pw X<QE]RZ System.err.println("文件下载结束!"); nB]Q^~jX } )KuvG:+9W catch(Exception e){e.printStackTrace ();} :RQ[(zD] } YHA[PF
Tk!b`9 FO5SXwx //获得文件长度 &7W6IM public long getFileSize() {S}@P~H= { 1CM1u+<iZ
int nFileLength = -1; y2U:( H:l! try{ L[bGO|O URL url = new URL(siteInfoBean.getSSiteURL()); S|J8:- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wtUG2 ( httpConnection.setRequestProperty("User-Agent","NetFox"); \nHlI=!P /trc&V sy?>e*-{ int responseCode=httpConnection.getResponseCode(); uUe\[-~ if(responseCode>=400) +o3g]0 { J50 ~B3bj` processErrorCode(responseCode); _tk5?9Ykn return -2; //-2 represent access is error U %ESuq# } DPwSg\*) TUaK:*x* q KM]wu0Et String sHeader; *X\c
$=* r+\z0_'
w6 )ziQ=k6d6 for(int i=1;;i++) (<l2 ^H { 6.|~~/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); _}&]`,s> //Utility.log(in.readLine()); nIjQLx sHeader=httpConnection.getHeaderFieldKey(i); p4'"Wk8 if(sHeader!=null) !Ia"pNDf { _@N)]!\MgP if(sHeader.equals("Content-Length")) ;}~=W!yz { !_9$[Oq~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
YBD {l break; 8zC k9& } 5E!m! nBZ } .( h$@|Y else <L~xR5 break; x+cF1N2. } |T_Pz&- } |y%].y) catch(IOException e){e.printStackTrace ();} rcZ SC3 catch(Exception e){e.printStackTrace ();} 2 ?T:RB} 358/t/4{p $ rYS Utility.log(nFileLength); o#xg:m_py |{)xC=
<%D"eD return nFileLength; Sx)Il~ x } kI3zYD^: `4H9f&8( 6I.m c //保存下载信息(文件指针位置) r0deBRM private void write_nPos() [
5W#1 & { %^=!s try{ ph?0I:eU output = new DataOutputStream(new FileOutputStream(tmpFile)); h.$__Gs output.writeInt(nStartPos.length); J,G9m4Z7 for(int i=0;i<nStartPos.length;i++) +MZO%4 { J7ekIQgR // output.writeLong(nPos); `4.sy +2 output.writeLong(fileSplitterFetch.nStartPos); AC:s4iacC output.writeLong(fileSplitterFetch.nEndPos); CQHp4_ } (oitCIV output.close(); U|7Qw|I7 } ^:!(jiH catch(IOException e){e.printStackTrace ();} Hu9R.[u catch(Exception e){e.printStackTrace ();} Q 95 } oPu|Q^I= )L<?g!j~ bsi q9$F //读取保存的下载信息(文件指针位置) /QXs-T}d private void read_nPos() zt)PZff/YQ { s`iNbW=" try{ xbrmPGpW$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); '<D `:srV int nCount = input.readInt(); |5IY`;+9 nStartPos = new long[nCount]; N9=r#![>, nEndPos = new long[nCount]; 8gtCY~m for(int i=0;i<nStartPos.length;i++) Xc2B2c { Kt90mA nStartPos = input.readLong(); oiv2rOFu nEndPos = input.readLong(); 0"^oTmQN } ju^"vw input.close(); "26B4* } ;WS7. catch(IOException e){e.printStackTrace ();} `,-hG catch(Exception e){e.printStackTrace ();} +:"6`um| } %V %#y $l P"=UI$HN HcBH!0 private void processErrorCode(int nErrorCode) )YnI!v2T { PF'5z#] NP System.err.println("Error Code : " + nErrorCode); E7yf[/it } SfZ=%6b7 tT* W5 n.a=K2H:V //停止文件下载 CFBUQMl> public void siteStop() bL'# { {wpMg bStop = true; A )RI:?+ for(int i=0;i<nStartPos.length;i++) 6>=-/)p} fileSplitterFetch.splitterStop(); Z9"{f)T vzyN c' {V%%^Zhwy } 8tV=fSHd } t*Vao //负责部分文件的抓取 npO@Haw **FileSplitterFetch.java ~Q_)>|R2 */ hB
P$9GR package NetFox; E?Qz/*'zv lTV@b& Q$?7) yyu+ import java.io.*; yhSk"e'G import java.net.*; W(&Go'9e" 5U-p'c9IC ,#E3,bu6_4 public class FileSplitterFetch extends Thread { -YzQ2#K B?$ 01?9V jU]]:S4xD/ String sURL; //File URL 79{.O`v long nStartPos; //File Snippet Start Position K-2o9No?j` long nEndPos; //File Snippet End Position 0<]$v"`I int nThreadID; //Thread's ID )g9)IF boolean bDownOver = false; //Downing is over }[>RxHd boolean bStop = false; //Stop identical $z2xZqe FileAccessI fileAccessI = null; //File Access interface 6\,DnO 7oZ@<QP' >W`S(a Mn public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException qs6Nb'JvQR { }mKGuCoH> this.sURL = sURL; ~/j$TT" this.nStartPos = nStart; qhV,u;\. this.nEndPos = nEnd; 5nM kd/ nThreadID = id; 3)6+1Yc fileAccessI = new FileAccessI(sName,nStartPos);//定位 ki;!WhF~ } V*6l6-y~Ih r+t ,J|V &u+yM
D public void run() =dgo!k { u
iBl#J Q while(nStartPos < nEndPos && !bStop) 6uu^A9x { Z{Vxr*9oO |RR"'o_E nGq]$h try{ ~A^E URL url = new URL(sURL); zWy
,Om8P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NFB*1_m httpConnection.setRequestProperty("User-Agent","NetFox"); 8K|J:[7 String sProperty = "bytes="+nStartPos+"-"; $T"h";M)s httpConnection.setRequestProperty("RANGE",sProperty); &}vR(y*#c Utility.log(sProperty); C1h#x'k Yuwc$Qp) {I4% InputStream input = httpConnection.getInputStream(); _,DO~L //logResponseHead(httpConnection); mbF(tSy Kb^>X{ J"diFz+20 byte[] b = new byte[1024]; ,%A)"doaG int nRead; znt)]>f# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *%:@
cbF-M { inYM+o!Ub nStartPos += fileAccessI.write(b,0,nRead); Z+NF(d //if(nThreadID == 1) Dt
W*n1Bt // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9Hu
d|n } `q%U{IR q<n[.u1@ VLiIO"u; Utility.log("Thread " + nThreadID + " is over!"); (@+h5@J[`I bDownOver = true; vwVVBG;t //nPos = fileAccessI.write (b,0,nRead); %Nj #0YF] } NeHx2m+ catch(Exception e){e.printStackTrace ();} #;`Oj } a>U6Ag< } I6+2>CUGo ^pj>9% GMz8B-vk //打印回应的头信息 _l<mu? " public void logResponseHead(HttpURLConnection con) &M[MEO`t8 { cQX:%Ix= for(int i=1;;i++) N&"QKd l { flP>@i:e6 String header=con.getHeaderFieldKey(i); mwIk^Sz]@ if(header!=null) Axlm<3<wf" //responseHeaders.put(header,httpConnection.getHeaderField(header)); q]TqI' o Utility.log(header+" : "+con.getHeaderField(header)); FqwIJ|ct else L?8^aG break; 'G8 ?'u_) } {SJsA)9:# } Rv<L#!;
t je,c7ZFO *hF^fxLbl public void splitterStop() qEQAn/& { B!}BM}r bStop = true; tw<P)V\h } -(9O6)Rs$ Q4?EZ_O paWxanSt } F;P5D< "]#'QuR -w]/7cH /* IE;\7r+h **FileAccess.java Ns<?b;aK *//文件访问(定位,写) &RW`W)0; package NetFox; =IZ[_ /@ import java.io.*; cKjRF6w =u=Kw R {q,?<zBzu public class FileAccessI implements Serializable{ XQ?fJWLU
]JdJe6`Mc //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 N*_"8LIfi_ RandomAccessFile oSavedFile; E!!
alc{ long nPos; d>|;f MQ` %`` CZ(`|;BC* public FileAccessI() throws IOException _Yq@ FOu { ~}Z'0W)Q`z this("",0); 8sg|MWSU } E^wyD-ii/ g)R1ObpZ _ym"m,,7? public FileAccessI(String sName,long nPos) throws IOException ~.oj.[} { ,lm=M5b oSavedFile = new RandomAccessFile(sName,"rw"); $UvPo0{ this.nPos = nPos; c}-(. eu oSavedFile.seek(nPos); :( ,mL2[ } $a(`ve| {^m Kvc |^( M{ public synchronized int write(byte[] b,int nStart,int nLen) O/b+CSS1 { F!yV8XQ int n = -1; ?S tsH try{ Sh&PNJ-* oSavedFile.write(b,nStart,nLen); gXy-Mpzp n = nLen; U| 5-0 u5 } pC(sS0J catch(IOException e) .=c<>/
0 { 80;n|nNB e.printStackTrace (); vH[Pb#f- } (=
;N{u ?*u*de[, %j+xgX/& return n; wtH~-xSB| } qCPmbg d
6t:hn )L5i&UK. } 9 OT,TpA :/N+;- 18 $`J_:H% /* s'\$t **SiteInfoBean.java Z(GfK0vU */ UE"GJt`I package NetFox; ,wAz^cK| o{WyQ&2N !L24+ $ public class SiteInfoBean { YY5!_k hdma=KqZ( 'T8W!&$ private String sSiteURL; //Site's URL ZH 6\><My private String sFilePath; //Saved File's Path 7h9U{4r: M private String sFileName; //Saved File's Name q_[G1&MC private int nSplitter; //Count of Splited Downloading File ('[TLHP # Su~`] .qv'6G public SiteInfoBean() /)3Lnn{W {//nSplitter的缺省值为5 f 2YLk //default value of nSplitter is 5 (eWPis[ this("","","",5); \cJa;WM> } MXtkP1A` 2?q(cpsN 9i q"" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) aHzHvl { 0Q5^C!K sSiteURL= sURL; jM)C4ii.-$ sFilePath = sPath; ~FU@wV^ sFileName = sName; 1GCzyBSbb this.nSplitter = nSpiltter; {Qu"%h.Al ;q>9W,jy V@-)\RZm } ]; $] G- PJ4(}a T1WWK' public String getSSiteURL() ?/hZb"6W { eGL1 return sSiteURL; !^c@shLN4 } ^Q<mV*~ 4'1m4Ugg OX]V)QHVZ public void setSSiteURL(String value) &DG->$&| { T#@lDpO sSiteURL = value; I{'f|+1 } KL,/2( d~J-|yyT .wA+S8}S public String getSFilePath() jhgX{xc { K6JVg$ return sFilePath; Ga>uFb}W~ } @&F@I3`{ $lA
V 6I. BimjQ;jtI public void setSFilePath(String value) ?
8aaD>OR$ { m><w0k?t sFilePath = value; .jw}JJ } Yj|eji7y /hrT +ECDD'^! public String getSFileName() ^jB8Q { ocbB& return sFileName; Jq.lT(E8D } f"u*D,/sS `?g`bN`Vn }T^cEfX public void setSFileName(String value)
'7Nr8D4L { lASL8O&\ sFileName = value; J&/lx${ } $0oO
&)* d,vNem-Z*L AmPMY:1i" public int getNSplitter() \6?A!w~6 { []R? ViG return nSplitter; \@3Qi8u// } 'TC/vnM sbkQ71T: XfE?C:v public void setNSplitter(int nCount) `!:q;i]} { &c(WE
RW?- nSplitter = nCount; 4(neKr5\# } HmfG$Z } 02`$OTKz Md6]R-l@ _Y=2/*y^ /* OH^N" L **Utility.java Ok7t@l$ */ aSuM2 package NetFox; [XRCLi} ?&LZB}1R b `2|I { public class Utility { cfox7FmW v%k9M{ TSAU?r\P public Utility() &R|/t:DN { YSJy` )15Z#`x I)q,kP@yY } ZvYLL{>}w 2)#K+O3c //线程睡眠 yKXff1^M public static void sleep(int nSecond) }>^Q'BW;65 { }R3=fbe,\ try{ )&era` e[ Thread.sleep(nSecond); ;U1UFqZ` } /vY_Y3k# catch(Exception e) a9n^WOJ6 { A*./,KT e.printStackTrace (); lPLz@Up~ } *5zrZ]^ } Ngr/QL]Q $M_x!f'{> //日志 #-3=o6DCK public static void log(String sMsg) SVjl~U-^ { d=,%=@ System.err.println(sMsg); `X,yM-( } r1ws1 rr= 2&+#Vsm`V =n^!VXaL]] public static void log(int sMsg) th6+2&B6 { DC1'Kyk System.err.println(sMsg); b}T6v } yNm:[bOER } '(f/~"9B :Rs^0F8)c <I}2k /* )CX4kPj **TestMethod.java \#68;)+= */ O62b+%~F package NetFox; p8s:g~ W [2ax>Yk$ USN8N ( public class TestMethod { Y(\T-
bI 0!z@2[Pe66 SXao|{?O public TestMethod() 2_Wg!bq { ///xx/weblogic60b2_win.exe ;['[?wk try{ Ro2d,' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9 Pw0m=4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); {JV@"t-X3" SiteFileFetch fileFetch = new SiteFileFetch(bean); "O8gJ0e fileFetch.start(); mDh1>>K'~ } =8gHS[ catch(Exception e){e.printStackTrace ();} C"lJl k9g^ RzhWD^b B 2oJb)CB } 1<ro7A4hK Tz2-Bp]h DO7W}WU public static void main(String[] args) k%y9aO { mAk{"65V new TestMethod(); ?Qb<-~~
j1 } kt4d;4n } CE15pNss 点击下载更多相关资料
|