-
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
|
/* jt}oq%Bf **SiteFileFetch.java ,=C ipL9] */ |)To 0Z package NetFox; X\!q8KEpR& import java.io.*;
Txo{6nd/ import java.net.*; Hk+44 r6\g#} 2|\mBP`ok public class SiteFileFetch extends Thread { uq9mq" En7+fQ cHr]{@7Cs SiteInfoBean siteInfoBean = null; //文件信息Bean *0,*F ~n long[] nStartPos; //开始位置 d(t)8k$ long[] nEndPos; //结束位置 \mu';[gLd FileSplitterFetch[] fileSplitterFetch; //子线程对象 W (TTsnnx long nFileLength; //文件长度 *-]k([wV boolean bFirst = true; //是否第一次取文件 A4l"^dZc boolean bStop = false; //停止标志 vh"';L_*37 File tmpFile; //文件下载的临时信息 $I-iq
@ DataOutputStream output; //输出到文件的输出流 M6MxY\uM w7~]c,$y. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) b?0WA.[{ public SiteFileFetch(SiteInfoBean bean) throws IOException jN{k } { NM9ViYm>P siteInfoBean = bean; yD3vq}U! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); TuCHD~rb tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *vBhd2HO if(tmpFile.exists ()) ! weYOOu { Hh](n<Bs bFirst = false; 6C.!+km read_nPos(); `4@`G:6BL } S|u5RU8*"| else 5C*Zb3VG4 { 6k,@+@]t. nStartPos = new long[bean.getNSplitter()]; ^{yb4yQ
0 nEndPos = new long[bean.getNSplitter()]; "o;%em*Bc } G2[2y-Rv P
>0S ZP &flcJ` >oy%qLHe~t } (1{OQ0N+x $+e(k~ 9|>y[i public void run() L}8 }Pns?& { ,t1s#*j\!q //获得文件长度 /mE:2K]C //分割文件 yF` (GU //实例FileSplitterFetch ZQz;EV! //启动FileSplitterFetch线程
2 (ux //等待子线程返回 2s 9U& try{ *Z"Kvj;>u if(bFirst) 0x'Fi2=` { Y=pRenV' nFileLength = getFileSize(); ~c1~)QzZ if(nFileLength == -1) ,,9vk \ { 3kJSz-_M System.err.println("File Length is not known!"); Grd9yLF } =8r,-3lC; else if(nFileLength == -2) %ULd_ES^ { 2(D&jL System.err.println("File is not access!"); Z.>?Dt } jS/$o ? else CA"`7<, { 0XIrEwm@% for(int i=0;i<nStartPos.length;i++) y7*^H { DUm/0q& nStartPos = (long)(i*(nFileLength/nStartPos.length)); hU2N{Ac } JR_c]AQYu for(int i=0;i<nEndPos.length-1;i++) f;ycQc@f { zgpPu4t nEndPos = nStartPos[i+1]; ',RR*{I } M[T!AO-S$ nEndPos[nEndPos.length-1] = nFileLength; wIbc8ze } ] @1ncn7N } gD fVY%[Z |@)ij c4i }S&SL) //启动子线程 zjJyc? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Fn%:0j for(int i=0;i<nStartPos.length;i++) z<P#djx { .~8IW,[ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y!s/uvRI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), qdu:kA:] nStartPos,nEndPos,i); 9zd)[4%= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ma*9O |v^ fileSplitterFetch.start(); 55N/[{[ } DFjkp;`1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Z#W`0G>' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); I3aEg // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _H3cqD nEndPos = " + nFileLength); CblL1 q8 // fileSplitterFetch[nPos.length-1].start(); A><%"9pZ Ox43(S0~ Ri-wbYFaP //等待子线程结束 sQH.}W$C //int count = 0; &k{@:z //是否结束while循环 j+ys&pDczm boolean breakWhile = false; 42Ffx?Qmv bFx?HM.AGW W]*wxzf!5z while(!bStop) $1@{Zz!S { <?nr"V write_nPos(); *AN#D?X_ Utility.sleep(500); SO&;]YO breakWhile = true; g%[Ruugu QY fS- #5I "M WA for(int i=0;i<nStartPos.length;i++) XF$C)id2p { BzUx@, if(!fileSplitterFetch.bDownOver) &]c9}Ic { JuI,wA breakWhile = false; nz&JG~Qfm break; @<sP1`1 } 5astv:p,P } 4%{m7CK} if(breakWhile) J\0YL\jw1K break; .lnD]Q \5l}5<| Ywr{/ //count++; ?d%}K76V< //if(count>4) Q'Tn+}B& // siteStop(); MLb\:Ihy } w/<hyEpxg [)=FZF6kG K&h|r`W( System.err.println("文件下载结束!"); $_UF9l0 } GgYomR: catch(Exception e){e.printStackTrace ();} 5-QXvw(TH } tpctz~ . "8X+F% ] ge-b\ //获得文件长度 ro{MDs public long getFileSize() Pg36'aTe%j { G#C)]4[n int nFileLength = -1; S'e2~-p0F try{ |g{AD` URL url = new URL(siteInfoBean.getSSiteURL()); @mazwr{B HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /_|1,x-Kx httpConnection.setRequestProperty("User-Agent","NetFox"); wtKh8^:YD ]=3O,\ 5W48z%MN
int responseCode=httpConnection.getResponseCode(); k|D!0^HE[ if(responseCode>=400) hd B[H8Q { 2P}RZvUd processErrorCode(responseCode); S7vE[VF5 return -2; //-2 represent access is error ;rKYWj>IR } yiq#p"Hs 2o/`8+eJu dw|0K+-PH String sHeader; [8w2U%}] _<7FR:oBZ $%-?S]6) for(int i=1;;i++) K/-D 5U { u/f&Wq/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /WfxI>v //Utility.log(in.readLine()); |*5nr5c_L sHeader=httpConnection.getHeaderFieldKey(i); 5,Y2Lzr if(sHeader!=null) kR]SxG9 { >e ;f{ if(sHeader.equals("Content-Length")) Ul
Iw&U { bRK9Qt#3 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P$Q&xN<#) break; \t@`]QzG: } hd;I x%tq> } JPG!cX% else -wfV break; gOM`I+CwT } >``GDjcJ } ,0bM*qob catch(IOException e){e.printStackTrace ();} [\1l4C catch(Exception e){e.printStackTrace ();} }nl)*l "_j7kYAl : 4WbDeR Utility.log(nFileLength); k Dt)S$N4n iurB8~Y 4#q JX)/ return nFileLength; ,be?GAq } ZZ*k3Ce C5UDez -;$/< //保存下载信息(文件指针位置) IcQ!A=lB private void write_nPos() $lA,{Q { qGCg3u6 try{ ,IE0+!I output = new DataOutputStream(new FileOutputStream(tmpFile)); Ui!|!V- output.writeInt(nStartPos.length);
YPnJldVn for(int i=0;i<nStartPos.length;i++) ^;Q
pE { j:3Hm0W3 // output.writeLong(nPos); FaE orQ output.writeLong(fileSplitterFetch.nStartPos); wtS*w output.writeLong(fileSplitterFetch.nEndPos); %)Dd{|c } ot#kU 8f output.close(); GQq'~Lr5 } \r,.hUp catch(IOException e){e.printStackTrace ();} Ky$G$H catch(Exception e){e.printStackTrace ();} m?$G(E5 } `|Z@UPHzG D(U3zXdO Cpv%s 1M //读取保存的下载信息(文件指针位置) agT[y/gb private void read_nPos() Lu.tRZ`$38 { MWh+h7k' try{ v=1S DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y4rJ- int nCount = input.readInt(); | V,jd nStartPos = new long[nCount]; >Eg .c nEndPos = new long[nCount]; %MZDm&f>Kk for(int i=0;i<nStartPos.length;i++) G;c0 { kTc5KHJ7 nStartPos = input.readLong(); ![ID0}MjJ nEndPos = input.readLong(); ULmdt
} l(\8c><m input.close(); F6]!?@ } 1";e'?^x catch(IOException e){e.printStackTrace ();} :k(t/*Nl3 catch(Exception e){e.printStackTrace ();} EiP&Y,vT } *1S.9L wf<`J/7u Z)T@`B6
private void processErrorCode(int nErrorCode) >@"3Q` { UH&1c8y} System.err.println("Error Code : " + nErrorCode); nk$V{(FJ } (`.qG
&6p ss@}Dt^ 3nC#$L- //停止文件下载 u m2s^G public void siteStop() ::Q); { @j2*.ee bStop = true; S Y>,kwHO for(int i=0;i<nStartPos.length;i++) :F
w"u4WI fileSplitterFetch.splitterStop(); vJAAAS EJ;0ypbG '7LJuMp$# } FoD/Q
} 5QFXj)hR+4 //负责部分文件的抓取 sa(M66KkU **FileSplitterFetch.java = *;Xc-_ */ mc=!X package NetFox; ?"<r9S|[O -1r &s ""v`0OP&J import java.io.*; H0b6ZA%n import java.net.*; s.I1L?s1w? LVFsd6:h &J/4J public class FileSplitterFetch extends Thread { _
kSPUP5 u"8 ;fS h[ZN >T String sURL; //File URL xAd>",=~ long nStartPos; //File Snippet Start Position p1VahjRE- long nEndPos; //File Snippet End Position )4L%zl7 int nThreadID; //Thread's ID &kjwIg{ boolean bDownOver = false; //Downing is over |RAQ% VXm boolean bStop = false; //Stop identical Wt)SdF=U/ FileAccessI fileAccessI = null; //File Access interface _`X#c-J )lDIzLp O*J_+6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Y:"v=EhB { FH`'1iVH this.sURL = sURL; Ad`[Rt']kI this.nStartPos = nStart; +G!jKta7B this.nEndPos = nEnd; x#j\"$dla nThreadID = id; nvs}r%1'5 fileAccessI = new FileAccessI(sName,nStartPos);//定位 !G"9xrr1 } m]=oaj@9 h\u0{!@} ULNAH`{D public void run() rTsbP40 { +{C9uY)$vf while(nStartPos < nEndPos && !bStop) l@tyg7CwY { Yf!*OGF kToVBU$ 16[-3cJ T try{ -#S)}NEn URL url = new URL(sURL); C7jc 6(>m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )pZekh]v httpConnection.setRequestProperty("User-Agent","NetFox"); s7.p$r String sProperty = "bytes="+nStartPos+"-"; ^0`<k httpConnection.setRequestProperty("RANGE",sProperty); =##s;zj(% Utility.log(sProperty); RhV:Z3f`6 {KU. | ,1bkJt InputStream input = httpConnection.getInputStream(); =~\]3g //logResponseHead(httpConnection); W3jXZ> ^)hAVf~E kh<pLI >$h byte[] b = new byte[1024]; %l8*t$8 int nRead; )@<HCRQ'q while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) SvX=isu!. { F%PwIB~cy nStartPos += fileAccessI.write(b,0,nRead); uO
?Od //if(nThreadID == 1) P>{US1t // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @ kJ0K } && DD BLL]^qN;Y UK"}}nO@e Utility.log("Thread " + nThreadID + " is over!"); V\@jC\-5Vt bDownOver = true; jF38kj3O7 //nPos = fileAccessI.write (b,0,nRead); 2/yXY_L } /B,:<&_- catch(Exception e){e.printStackTrace ();} S]e j=6SP } yHWi[7$ } _e?q4>B)c :H!(?(Pie Ic[}V0dk //打印回应的头信息 }A4nJ>`tq public void logResponseHead(HttpURLConnection con) J+)'-OFt0 { Q;$
9qOF for(int i=1;;i++) =zeFK_S! {
eeW' [ String header=con.getHeaderFieldKey(i); 2E`~ qn if(header!=null) $^W-Wmsz //responseHeaders.put(header,httpConnection.getHeaderField(header)); u\{qH!?t Utility.log(header+" : "+con.getHeaderField(header)); ~lzdbX else ?Yq J.F; break; X5uS>V%/ } K-J|/eB } ds*m6#1b \8;Qv $uEJn&n7} public void splitterStop() .UM<a
Ik { ''#p47$8<d bStop = true; 7"ylN"syZ } p+, 1Fi cPpu g3|BE2? } n?'d|h rr |"r <Ctyht0c. /* 9pWi.J **FileAccess.java NH'1rt(w *//文件访问(定位,写) f>.4-a? package NetFox; Tr}R`6d$ import java.io.*; ZlthYuJ 'oleB_B nIf N" public class FileAccessI implements Serializable{ TE3*ktB{N YecT 96% //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6fh{lx> RandomAccessFile oSavedFile; |q3f]T&+>{ long nPos; B;VH `*+X Mv|vRx^b $bk>kbl P public FileAccessI() throws IOException r=h8oUNEJ* { KwS`3 6: this("",0); |5W8Q|>% } e#tIk;9Xz L>SZgmV+ E]NY
(1 public FileAccessI(String sName,long nPos) throws IOException x_yF|]aI! { :]'q#$! oSavedFile = new RandomAccessFile(sName,"rw"); /T,zZ9= this.nPos = nPos; Q/p(#/y#b oSavedFile.seek(nPos); DL,[k
( } NdZ)[f:2 SaCx)8ul0 `%|u! public synchronized int write(byte[] b,int nStart,int nLen) XTV0Le\f { Qh^R Ax int n = -1; sH%&+4!3 try{ hGvq T, ' oSavedFile.write(b,nStart,nLen); $57\u/(
n = nLen; j~epbl)pC } m$?.Yig? catch(IOException e) {gsW(T>) { EJ G2^DSS e.printStackTrace (); T8U[xu.> } _
\l
HI Q\|18wkW Rb#/qkk/ return n; L;3aZt,#O } }wfI4?}j} F99A;M8( ? ~,JY } yxvjg\!& (k8Z=/N~ ijFV<P /*
vO]J]][ **SiteInfoBean.java >60"p~t */ Ir/:d]N* package NetFox; U+} y
%3l 6}ftBmv KSc~GP_ public class SiteInfoBean { !Av1Leb9$ ZOu R"9] .a,(pq Jg private String sSiteURL; //Site's URL HyEa_9
private String sFilePath; //Saved File's Path |<rfvsQ. private String sFileName; //Saved File's Name Jn*Nao_) private int nSplitter; //Count of Splited Downloading File _s*!
t Rboof`pVt q!&B6] public SiteInfoBean() cz#_<8'N {//nSplitter的缺省值为5 FZ p<|t //default value of nSplitter is 5 vL$|9|W( this("","","",5); r1G8]a gO } ^wJEfac xl8#=qmCD 6.'$EtH public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) j&CZ=?K^c { *Tp]h 0 sSiteURL= sURL; >)^NJ2Fd sFilePath = sPath; "15=ET sFileName = sName; W`x)=y]Z this.nSplitter = nSpiltter; 59i] +9zA^0 x>
\Bxa8 } vLDi ; <Oa9oM},d $)*xC!@6X public String getSSiteURL() 2r;GcjezH { RdI};K return sSiteURL; "0-y*1/m } &SmXI5>Bo0 K/| K]<u8eF public void setSSiteURL(String value) #ZWl=z5aBi { OQFi.8 sSiteURL = value; y(v_-6b } @9vvR7{P (6R4 \8z2 f`|G]da-3o public String getSFilePath() 8l23%iWxe { {ma;G[! return sFilePath; J3=BE2L } ug#<LO-.Rd Wc|z7P~',% E[?kGR[ public void setSFilePath(String value) HO5d%85 { 4AHL3@x sFilePath = value; tU:FX[&?R } fsvYU0L w$>3pQ8d wmYvD< public String getSFileName() 1[DS'S { &{W^W8,% return sFileName; ?"j@;/= } U$'y_}V }V]eg,.BJ l^r' $;<m public void setSFileName(String value) t5)J;0/ { +(mL~td01 sFileName = value; _tj&Psp } [H,u)8) ~NNv>5t5 JJ5C}`( public int getNSplitter() 2-v\3voN { cNj*E
=~; return nSplitter; "H1:0p } =.b Y#4 l~1AT% &&PgOFD public void setNSplitter(int nCount) bx>i6
R2 { 4*M@]J " nSplitter = nCount; 5@P-g } 3hS6jS } A*'V+( CgnXr/!L c3k|G<C2 /* yVS\Q,:J9 **Utility.java \L[i9m| e */ 84M3c package NetFox; iP "EA8 Q)^g3J SI*^f\lu public class Utility { onl>54M^ PayV,8
inF6M8
A1 public Utility() :'*DMW~ { o6|-=FcvC )}-$A-p# R]QpMj%o } &1Fply7(Ay S()Za@ [a$ //线程睡眠 ($WE=biZ& public static void sleep(int nSecond) ^l !L)iw { <k]qH-v4 try{ 7GZq|M_:y Thread.sleep(nSecond); N5 n> }
yP\Up catch(Exception e) Sz0+<F#5 { k
dU!
kj e.printStackTrace (); RJc%,
]: } `6Hf&u< } 40K2uT{cq Eark) //日志 \G;CQV#{9 public static void log(String sMsg) h~miP7,c<u { fLB1)kTS System.err.println(sMsg); F2>%KuM } a8s4T$ P5URvEnz: ' G#SLqZy public static void log(int sMsg) ((MLM3zJ { DQgH_! System.err.println(sMsg); 6Rz[?-mkLO } kO ![X ^V } +1@AGJU3 *Bw #c
j :ba/W&-d /* ULl_\5s2 **TestMethod.java OM!=ViN(= */ uO'/|[`8 package NetFox; o'Y#H
r)/ 0HbJKix! 'ZnIRE,N public class TestMethod { ~A >oO-0K r_2btpL^ zj20;5o>U& public TestMethod() 6k9Lx C:M { ///xx/weblogic60b2_win.exe mk= #\> try{ *K)0UKBr SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #s+Q{2s //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .~`Y)PON SiteFileFetch fileFetch = new SiteFileFetch(bean); _^T}_ fileFetch.start(); %h+uD^^$ } D/s?i[lb catch(Exception e){e.printStackTrace ();} LK+felL zilaP)5x6
{tt$w>X } j=j+Nf$ n\ Uh `C'}e public static void main(String[] args) &;v!oe { 93D
\R new TestMethod(); K0<yvew } e@j8T
gI) } p@tp]u`7 点击下载更多相关资料
|