-
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
|
/* +?_!8N8 **SiteFileFetch.java H[=\_X1o( */ `w@:h4f package NetFox; {9x_E { import java.io.*; /v{+V/'+ import java.net.*; J@3, &\h7E
c!6D{(sfh public class SiteFileFetch extends Thread { eADCT nS+Rbhs Rlq7.2cP SiteInfoBean siteInfoBean = null; //文件信息Bean :#rP$LSYC long[] nStartPos; //开始位置 NoI|Dz long[] nEndPos; //结束位置 <FT7QO$I FileSplitterFetch[] fileSplitterFetch; //子线程对象 f}:C~L! long nFileLength; //文件长度 j}+3+ 8D boolean bFirst = true; //是否第一次取文件 sZ `Tv[ boolean bStop = false; //停止标志 U&^q#[' File tmpFile; //文件下载的临时信息 ? x)^f+:9| DataOutputStream output; //输出到文件的输出流 VvhfD2*T eM7@!CdA9q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) =2R4Z8G public SiteFileFetch(SiteInfoBean bean) throws IOException iN;Pg_Kq { y=3 dGOFB siteInfoBean = bean; w~3X
m{ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =ZgueUz, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !cW rB9 if(tmpFile.exists ()) $WA wMS, { A7p4M?09 bFirst = false; -]N2V'QB read_nPos(); (J:+'u } AWO)]rM else i
;FKnK { (.J/Ql0Y nStartPos = new long[bean.getNSplitter()]; T7[@ lMa? nEndPos = new long[bean.getNSplitter()]; :5YIoC } yV^Yp=f_ eg[EFI.h *!5CL' q;{(o2g } ]c(FgYc 'Ru(`"
1| ~f<']zXv public void run() s:T%,xS { $>rt0LOF //获得文件长度 )nN!% |J //分割文件 YvY|\2^K //实例FileSplitterFetch o}N@Q-i gq //启动FileSplitterFetch线程 DV5hTw0 //等待子线程返回 EP>u% ]# try{ 6H#:rM if(bFirst) FXCBX:LnvU { w{ja*F6 nFileLength = getFileSize(); O& Y;/$w if(nFileLength == -1) 6-U_TV { }k-V( System.err.println("File Length is not known!"); /T _M't@j } 1?'4%>kp else if(nFileLength == -2) /~LE1^1&U { x@#>l8k? System.err.println("File is not access!"); yR$_ZXsd } J= A)]YE else 0]d;)_`@ { *byUqY3( for(int i=0;i<nStartPos.length;i++) U,rI/' { \Ec<ch[)c nStartPos = (long)(i*(nFileLength/nStartPos.length)); e@3SF } !j!w$ for(int i=0;i<nEndPos.length-1;i++) [RF,0>^b { [@i:qB>B nEndPos = nStartPos[i+1]; }*x1e_m}H } eMGJx "a nEndPos[nEndPos.length-1] = nFileLength; >}SEU-7&\ } "L>'X22ed } Vgm*5a6t - %fQr5 [6VB& //启动子线程 =2!p>>t,d; fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k*1Lr\1 for(int i=0;i<nStartPos.length;i++) ,_V V;P { |\(uO|)ju fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), QE]'Dc% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &bTCTDZh nStartPos,nEndPos,i); +\=g&G, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (T1< (YZ fileSplitterFetch.start(); a>j}@8[J } }geb959 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hjL;B'IL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); G)vNMl // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 'z}
t= ? nEndPos = " + nFileLength); eo+<@83 // fileSplitterFetch[nPos.length-1].start(); O:?3B!wF Zc7;&cz ZTR9e\F //等待子线程结束 / //int count = 0; 'lIs`Zc5N //是否结束while循环 xvl$,\iqE boolean breakWhile = false; MCN>3/81 UytMnJ88 x80IS:TP while(!bStop) R+LKa Z { |4\1V=( write_nPos(); #-yCR Utility.sleep(500); r;Sk[Y5# breakWhile = true; ]p! { bZ*=fdh FWbp;v{ for(int i=0;i<nStartPos.length;i++) w)dnmrKDZg { )Do 0 if(!fileSplitterFetch.bDownOver) =MNp; { iil<zEic breakWhile = false; 3aW<FSgP break; cC~RW71 } aAjl
58 } }`qAb/Ov if(breakWhile) lu.]R>w break; ]dUG=dWO 8c5YX wI@87& //count++; 9KVJk</:n //if(count>4) atyvo0fNd // siteStop(); wn"}<ka } vPDw22L;' C8m 9H8Qm 5%}e j)@ System.err.println("文件下载结束!"); `
-_! %m/ } >9H^r\ catch(Exception e){e.printStackTrace ();} x;~:p;]J2F } {SV/AN S= 4o@3%$ >~o-6g //获得文件长度 ABCm2$< public long getFileSize() wv9HiHz8gD { hTDK[4e int nFileLength = -1; /2p*uv}IP try{ /h>g-zb URL url = new URL(siteInfoBean.getSSiteURL()); uSfHlN4l HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i.mv`u Dm httpConnection.setRequestProperty("User-Agent","NetFox"); v]k-xn|$j !Se0&Ob l5D)UO int responseCode=httpConnection.getResponseCode(); R1zt6oY if(responseCode>=400) #*g=F4>t { T]tP!a;K processErrorCode(responseCode); >ai,6! return -2; //-2 represent access is error Go%Z^pF3CO } 6q^$}eOt 6ld4'oM WFF?VBT'^ String sHeader; WZ' Z"' 9tHK_),9 e"hfeNphz for(int i=1;;i++) >eTbg"\ { iwF_'I$#N //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2F2Hl //Utility.log(in.readLine()); 19$A!kH\ sHeader=httpConnection.getHeaderFieldKey(i); 6l\5J6x if(sHeader!=null) \B#tB?rA
{ bB$f=W!m% if(sHeader.equals("Content-Length")) JK2{9#* { lsax.uG5x nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Jj=qC{] break; .`IhxE~mN } I0mp [6 } i)x0]XF else b<tV>d"Fv break; v6 5C
j2ec } ~uhW~bT } w'TAM"D` catch(IOException e){e.printStackTrace ();} xeF>"6\ catch(Exception e){e.printStackTrace ();} rD}g9?ut Ll|-CY $ CQ2vFg3+o Utility.log(nFileLength); =NY;#Jjn 5len}){ ]he~KO[j< return nFileLength; ?;l@yx } ZS.=GjK RsDSsux dqB,i9-- //保存下载信息(文件指针位置) 5qM$ahN3wH private void write_nPos() %6q82}# ` { 5'set? try{ eay|>xa2 output = new DataOutputStream(new FileOutputStream(tmpFile)); z\eQB%aM output.writeInt(nStartPos.length); N}5 for(int i=0;i<nStartPos.length;i++) x+Yo#u22 { o<5`uV!f // output.writeLong(nPos); Q>$B.z output.writeLong(fileSplitterFetch.nStartPos); U$5x#{AFp output.writeLong(fileSplitterFetch.nEndPos); HVa D } syr0|K[ output.close(); I7_8oq\3D } u4hn9**a1 catch(IOException e){e.printStackTrace ();} WD%(RC"Q catch(Exception e){e.printStackTrace ();} ku,{NY
f^Y } I3>8B N)mZ!K44 - ;gQy[U //读取保存的下载信息(文件指针位置) \~8W0q.4M private void read_nPos() eZ:iW#YF { pJFn
8&!J try{ =bh: U90y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Y%/RGYKh int nCount = input.readInt(); v(;yy{>8" nStartPos = new long[nCount]; z*T41;b nEndPos = new long[nCount]; f2c<-}wR for(int i=0;i<nStartPos.length;i++) qoZi1,i' { 4AL,=C3 nStartPos = input.readLong(); P
DY :?/ nEndPos = input.readLong(); V(Pw|u"
e } qcO~}MJr}^ input.close(); v9H
t~\> } "iEnsP@'Wg catch(IOException e){e.printStackTrace ();} <%.%q catch(Exception e){e.printStackTrace ();} jUE:QOfRib } d_(>:|oh 2W0nA t <U$YJtEK private void processErrorCode(int nErrorCode) Vsi:O7|+
} { u)h
{"pP System.err.println("Error Code : " + nErrorCode); @MibKj>o } jS]Saqd Xj]9/?B? Zsapu1HoL\ //停止文件下载 lrc%GU): public void siteStop() k% \;$u=% { #CLjQJ bStop = true; :g$"Xc8Zn for(int i=0;i<nStartPos.length;i++) wxBHlgK4z fileSplitterFetch.splitterStop(); A'CD,R+gR 3]1 !g6 '?$@hqQn } |?jgjn&RQ } ~H#c-B //负责部分文件的抓取 Oa:C'M
b **FileSplitterFetch.java #qVvh3#g */ w &YUb,{Y package NetFox; &L0Ii)Ns $MvKwQ/ B tznms' import java.io.*; Q^<amM! import java.net.*; N'{Yhx u ps:"0^7 `\:Ede public class FileSplitterFetch extends Thread { &(<>}
r <`-sS]=d} l'<&H#A;' String sURL; //File URL PO5,lcBD< long nStartPos; //File Snippet Start Position #O_%!7M{4 long nEndPos; //File Snippet End Position M5RN Z% int nThreadID; //Thread's ID VS4Glx73 boolean bDownOver = false; //Downing is over ;^s|n)F#c boolean bStop = false; //Stop identical i9 CQ~ FileAccessI fileAccessI = null; //File Access interface 5vD\?,f E vy2<'V*y} gWjYS#D public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v2rzHzFU { fph+05.% this.sURL = sURL; |5>A^a this.nStartPos = nStart; uUS~"\`fk this.nEndPos = nEnd; >l-u{([B nThreadID = id; 7Z+Fjy-B fileAccessI = new FileAccessI(sName,nStartPos);//定位 Otr=+i
ZI } @Wd(>*"zw _Cf:\Xs
m &!;o[joG public void run() ((AK7hb { 5o{U$ while(nStartPos < nEndPos && !bStop) 3qGz(6w6E { RpU i' >&>EjK4? r]}6iF. try{ x]Nx,tt URL url = new URL(sURL); [<
9%IGH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b!MN QGs httpConnection.setRequestProperty("User-Agent","NetFox"); KBi(Ns#+ String sProperty = "bytes="+nStartPos+"-"; $EIKi'!8 httpConnection.setRequestProperty("RANGE",sProperty); nT4Ryld Utility.log(sProperty); V@RdvQy 2T%sHp~qt 0 GFho$f InputStream input = httpConnection.getInputStream(); /Xc9}~t6 //logResponseHead(httpConnection); .|DrXJ\c 6 ym$8^ f"\klfrRI_ byte[] b = new byte[1024]; +p _?ekV\ int nRead; (!m6>m2 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) r1.zURY { _lT'nFe=Q nStartPos += fileAccessI.write(b,0,nRead); Y$,++wx //if(nThreadID == 1) %c$|.TkX // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JSq3)o9?/ } V_^pPBa IEM{? q|klsup Utility.log("Thread " + nThreadID + " is over!"); >^W6'Q$P< bDownOver = true; zSMM?g^T //nPos = fileAccessI.write (b,0,nRead); WAuT`^"u } fhdqes]) catch(Exception e){e.printStackTrace ();} MdEds|D } 'b [O-6v } x~m$(LT '9qyf<MlY lpB:lRM //打印回应的头信息 4!3<[J;N; public void logResponseHead(HttpURLConnection con) 3ohHBo { U![$7k>,pr for(int i=1;;i++) ^K8XY@{& { ]m&Ss String header=con.getHeaderFieldKey(i); rHybP6C< if(header!=null) l ~xXy< //responseHeaders.put(header,httpConnection.getHeaderField(header)); TZn5s~t Utility.log(header+" : "+con.getHeaderField(header)); xIb{*)BUwc else p_zVrlVb break; J?E!\V&U } Zu~t )W } ~U ]%>Zf c/F!cW{z^ .'l3NV^{ public void splitterStop() %k"hzjXAw { 9N2.:<so bStop = true; 0>;[EFL } )Fqtb;W= [H$kVQC tmeg=U7 } z0Y L, 1?"Zrd ]|Ie E!6 /* ,#^2t_c/ **FileAccess.java 6%o@!|=I *//文件访问(定位,写) 3+C;zDKa package NetFox; n(n7"+B import java.io.*; {q&`B 'Vhnio;qC Xp6Z<Z&N public class FileAccessI implements Serializable{ !0Ak)Q]e' QY\'Uu{ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 R$it`0D4o RandomAccessFile oSavedFile; xkkG#n) long nPos; R&'Mze fb ZY6%%7?1 _jVJkg)] public FileAccessI() throws IOException K)\D,5X^ { ZxDh!_[s this("",0); (f*r } t?;=\%^< f8f|'v| e&mTaCLG public FileAccessI(String sName,long nPos) throws IOException V Kc`mE { g,RhUt9 oSavedFile = new RandomAccessFile(sName,"rw"); G+3uY25y this.nPos = nPos; COH.`Tv{* oSavedFile.seek(nPos); ~(cqFf } B\dhw@hM +xr;X 9
y}W*P#BDO public synchronized int write(byte[] b,int nStart,int nLen)
@3I?T
Q1 { m
.En!~t int n = -1; (+TL
]9P try{ \qJ^n % oSavedFile.write(b,nStart,nLen); v1NFz>Hx n = nLen; D]V&1n } PJh97%7 catch(IOException e) L[:M[,?=` { D6P/39}W e.printStackTrace (); s6oIj$ } od3b,Q Ap}`Q(. 52*KRq
o return n; ><)fK5x } 8KzH
- d^|r#"o[ p"n3JV.~k+ } ve*6WDK,H wY7+E/ &KeD{M% /* w< |Lx#L} **SiteInfoBean.java k%LsjN.S */ J]&nZud` package NetFox; uq]E^#^ y)`q% J& 35SL*zS@- public class SiteInfoBean { bB.Yq3KI [\"<=lb` c=IjR3F private String sSiteURL; //Site's URL 71HrpTl1fw private String sFilePath; //Saved File's Path oeG?2!Zh private String sFileName; //Saved File's Name ?? Dv\yLZI private int nSplitter; //Count of Splited Downloading File ]Ai!G7s8P &_Gu'A({J `?vI_>md'! public SiteInfoBean() 4"V6k4i5 {//nSplitter的缺省值为5 2!Pwg0%2 //default value of nSplitter is 5 ?)"v~vs this("","","",5); ; 5!8LmZ0# } Dl=vv9 A:,V) Um
I,?p public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .J9\Fr@ { ev(E sSiteURL= sURL; 9QN(Wq@ sFilePath = sPath; VD2o#.7*eu sFileName = sName; X#u< 3<P this.nSplitter = nSpiltter; ltmD=-]G_ ]\J( jD_B&MQz } X0%BE! R&1xZFj [{rne2sA public String getSSiteURL()
8B7,qxZ { LwEc*79 return sSiteURL; x!9bvQT } coc:$Sr% Sy34doAZ C<iOa)_@Q public void setSSiteURL(String value) uBBW2 { 5?gZw;yiv% sSiteURL = value; x9H
qc9q } 4S,/Z{ J. 0Ewt
>~n =zKbvwe%X public String getSFilePath() '3ZYoA% { 3x~AaC.j return sFilePath; {]:B80I;2 } Ty"=3AvRLV Q02:qn?T ,DWC=:@X public void setSFilePath(String value) N!=Q]\ZD { 3 p9LVa sFilePath = value; WevXQ-eKm } qt#4i.Iu+ N`i`[ f 7)+%;|~ public String getSFileName() 3`\)Qm { gT4H?
#UB return sFileName;
.)XJ- } 9w,u4q
{:d9q 1'g{tP"d public void setSFileName(String value) ]%/a'[ { $;%dQ!7* sFileName = value; q5(Z
} {V9}W< Oe%jV,S |V >c:- ;( k public int getNSplitter() $5m_)]w4a { " ^:$7~%bA return nSplitter; N?;5%pG
< } wC[Bh^] #NLLlEE z;EnAy {9 public void setNSplitter(int nCount) *Ad7GG1/u { p~THliwd nSplitter = nCount; 7Y(ySW } tpi>$:e } HR83{B21 ZM%z"hO9R Y4|g^>{<ni /* \V,;F!*#G **Utility.java R9z^=QKcH */ i\?P>:) package NetFox; <\cH9D`dE |.Pl[y (^Kcyag4 public class Utility {
b(~
gQM #TX=%x6 <KDl2>O public Utility() !*gTC1bvB { &`'gO
9 wB;'+d& 5Y&s+| } k(;c<Z{?1
zSiSZMP" //线程睡眠 QAy9RQ0 public static void sleep(int nSecond) K>`7f]?H*e { SAEr $F^ try{ a,U =irBA Thread.sleep(nSecond); GBZx@B[TY } WqC6c&NM catch(Exception e) w^&TG3m1~ { z.[ Ok e.printStackTrace (); >, &6zj } ~qiSkG } 66%#$WH# {O,Cc$_ //日志 %XqLyeOS public static void log(String sMsg) (r^IW{IndX { WbS2w @8 System.err.println(sMsg); K`@GNT& } F~ n}Ep~1 Iy](?b T]nZ3EZ public static void log(int sMsg) d%9r"=/
{ )^^r\ System.err.println(sMsg); 'C~NQ{1TV } ~} mX#, } 'PlKCn`(w >:s.`jV< 9`)NFy? /* J680|\ ER **TestMethod.java ?|:!PF*L~z */ %f@VOSs package NetFox; )*^PMf ~R) Km`t r! 5C3 public class TestMethod { oj<.axA, KTk%Np (G"b)"Qum public TestMethod() yi7-[W} { ///xx/weblogic60b2_win.exe F5J=+Q%8[& try{ }_M.-Xm SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >U9!KB //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); F#iLMO&Q SiteFileFetch fileFetch = new SiteFileFetch(bean); HF5aU:M fileFetch.start(); 2u6N';jgZ } jo<[|ZD catch(Exception e){e.printStackTrace ();} C
did*hxJ N`grr{*_ bs]ret$?(q } U;6~]0^K DSy,#yA x-Z`^O public static void main(String[] args) m{x!uq { $Kb-mFR new TestMethod(); 4%p5X8|\ih } tB[(o%k } ~@bCSOIy 点击下载更多相关资料
|