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/* Yf2+@E **SiteFileFetch.java s_Ge22BZ */ WSpg(\Cs package NetFox; ][>M<J import java.io.*; &|&YRHv import java.net.*; {]/Jk07 Q,M/R6i- 2dV\=vd public class SiteFileFetch extends Thread { 83 ^,'Z "=Fn.r4I .o,51dn+ s SiteInfoBean siteInfoBean = null; //文件信息Bean ekk&TTp# long[] nStartPos; //开始位置 MkV*+LXC long[] nEndPos; //结束位置 GWkJ/EX FileSplitterFetch[] fileSplitterFetch; //子线程对象 (j"~]T!)1 long nFileLength; //文件长度
y8(?:#ZC boolean bFirst = true; //是否第一次取文件 ,ex(pmZ; boolean bStop = false; //停止标志 2zr WR%B File tmpFile; //文件下载的临时信息 nLN6@ DataOutputStream output; //输出到文件的输出流 qwq+?fj={ smLDm //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) oe_[h]Hgl public SiteFileFetch(SiteInfoBean bean) throws IOException ]@<3 6ByM { |Nx!g fU siteInfoBean = bean; K&a]pL6D //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); {]_{BcK+ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cI4qgV if(tmpFile.exists ()) Z=/L6Zb { |~"A:gf bFirst = false; .1? i'8TF read_nPos(); : z,vJ~PW } F+m4 else =x.v*W]F` { qu~"C, nStartPos = new long[bean.getNSplitter()]; '8pPGh9D nEndPos = new long[bean.getNSplitter()]; H/la'f#o% } $q@RHcj &u`rE"" hu*>B %IH|zSr)EM } 9oau_Q# )1yUV*6 D!E 9@*Lf public void run() ]B.,7 { .gsu_N_v //获得文件长度 KL\=:iWA //分割文件 $=g.-F%*= //实例FileSplitterFetch rxK[CDM, //启动FileSplitterFetch线程 Cq;K,B9 //等待子线程返回 <IkD=X try{ rpP+20 v if(bFirst) YHv,Z|.w { MVU'GHv nFileLength = getFileSize(); iO= uXN1g if(nFileLength == -1) Ue\oIi { Q\>SF System.err.println("File Length is not known!"); cW|Zgz8vv } #Uk6Fmu] else if(nFileLength == -2) lJQl$Wx^ { 7)It1i- System.err.println("File is not access!"); &\D<n;3 } Sw9mrhzJfe else G;#t6bk { IhKas4 for(int i=0;i<nStartPos.length;i++) +z?f,`.* { \7w85$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5}^08Xl } L5|;VH for(int i=0;i<nEndPos.length-1;i++) SE-, 1p { K~~*M?.Z nEndPos = nStartPos[i+1]; cw-JGqLx } `0vy+T5 nEndPos[nEndPos.length-1] = nFileLength; KdQ|$t } FbNQ } ^WYG?/{4 bIl0rx[` ]]QCJf@p //启动子线程 {_N(S]Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 4)Wzj4qW for(int i=0;i<nStartPos.length;i++) - OGy-" { #UnO~IE.m$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zSufU2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +A3\Hj&W nStartPos,nEndPos,i); .8xacVyK2 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ox1QP2t6Y fileSplitterFetch.start(); 8n
p>#V } *ww(5 t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [#fqyg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $<DA[
%pv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", FNRE_83 nEndPos = " + nFileLength); Q6<Uuiw // fileSplitterFetch[nPos.length-1].start(); >l*9DaZ y(BLin!O. e$|)wOwU //等待子线程结束 fe`G^hV //int count = 0; i]WlMC6 //是否结束while循环 jsht2]iq3K boolean breakWhile = false; gG> ^h1_o~ ?PtRb:RHt -^yc yZ while(!bStop) 1ORi]` { /'^>-!8_1 write_nPos(); tl#s: Utility.sleep(500); 6y!?xot breakWhile = true; L. ?dI82c gx
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9MZ for(int i=0;i<nStartPos.length;i++) m&c(N { \(t>(4s_~ if(!fileSplitterFetch.bDownOver) $6%;mep { 9rc
n*sm breakWhile = false; j@\/]oL^We break; k$- q;VI } Eu~wbU"% } rZ4<*Zegv if(breakWhile) T1[ZrY'0 break; "<R
2oo)^ |VF"Cjw? X,CFY //count++; LMj'?SuH //if(count>4) nECf2>Yp v // siteStop(); ;P#*R3
} t O;W?g ofv
1G=P PX/0 jv System.err.println("文件下载结束!"); ?2>v5p } .Sw'Bo!Ee catch(Exception e){e.printStackTrace ();} =xP{f<` } .Q@'O b` zhL,BTH ?E@[~qq_ //获得文件长度 "$YLU}S9 public long getFileSize() =i %w_e { RL8wSK int nFileLength = -1; ZJM^P'r.1c try{ Bq`kVfx URL url = new URL(siteInfoBean.getSSiteURL()); <cjTn:w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); aBLb i httpConnection.setRequestProperty("User-Agent","NetFox"); L#bQ`t ay[*b_f M&-/&>n! int responseCode=httpConnection.getResponseCode(); "A3xX&9-q if(responseCode>=400) l_EI7mJ { A2S9h,t processErrorCode(responseCode); S*:w\nXP~ return -2; //-2 represent access is error
>ON.ftZi } ]iX$p~riH Rj=Om DlO;EH String sHeader; (LPD S`.-D+.68 6[7k}9`alz for(int i=1;;i++) IQv>{h} { F'*4:WD7 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); - mXr6R? //Utility.log(in.readLine()); {mGWMv sHeader=httpConnection.getHeaderFieldKey(i); n/D]r if(sHeader!=null) }Cf[nGh|B { M lwQ_5O if(sHeader.equals("Content-Length")) h]9^bX__Z { &|] ^ u/ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); W{aN S@1 break; c>.X c[H } Lcm!e } v21? else ~Wv?p4 break; !~v>&bCG>9 } Z8UM0B=i } -C<aB750O) catch(IOException e){e.printStackTrace ();} Wno5B/V catch(Exception e){e.printStackTrace ();} 5!*a,$S q>X2=&1 D3ad2vH Utility.log(nFileLength); 4F!d V;"Z( [N)M]u (0f^Hh wF return nFileLength; iq-o$6Pg } M+:wa@Kl t68RWzqiG[ 1fZ:^|\ //保存下载信息(文件指针位置) 1YL5 ![T private void write_nPos() IrC=9%pd$R { L;`t%1 try{ K4~Ox output = new DataOutputStream(new FileOutputStream(tmpFile)); 5Bo)j_Qo output.writeInt(nStartPos.length); Fwqf4&/ for(int i=0;i<nStartPos.length;i++) 9f`Pi:*+/ { yjzNU5F // output.writeLong(nPos); Xi.?9J`@ output.writeLong(fileSplitterFetch.nStartPos); ]+P&Y: output.writeLong(fileSplitterFetch.nEndPos); W9"I++~f } =ndKG5 output.close(); ak[)+_k_ } TVA1FD catch(IOException e){e.printStackTrace ();} O6]~5&8U. catch(Exception e){e.printStackTrace ();} gG>>ynn } AF6'JxG7 ^EOjq @35shLs //读取保存的下载信息(文件指针位置) wP*Z/}Uum+ private void read_nPos() b??1Up { (P-<9y@ try{ K2 2Xo<3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); g_U69
z int nCount = input.readInt(); s=4.Ovd\ nStartPos = new long[nCount]; +&@0;zSga nEndPos = new long[nCount]; KG$2u:n for(int i=0;i<nStartPos.length;i++) ig{5]wZ( { |{T2|iJI nStartPos = input.readLong(); }__+[- nEndPos = input.readLong(); A$cbH. } _L":Wux input.close(); bSfQH4F } HenJlo catch(IOException e){e.printStackTrace ();} ~@lNBF catch(Exception e){e.printStackTrace ();} X[<9+Q-& } at!?"u ~@JC1+ <h({+N private void processErrorCode(int nErrorCode) L%FL{G
{ #ZA
YP System.err.println("Error Code : " + nErrorCode); 30@ GFaab } ^dqEOW 9&cZIP [@6iStRg7 //停止文件下载 j$6}r public void siteStop() WmA578|l! { <X?F :?Mk bStop = true; +zsya4r for(int i=0;i<nStartPos.length;i++) $]FWpr%) fileSplitterFetch.splitterStop(); n9fk{"y'G MXb(Z9)]kw |k+^D : } x<(h9tB } JN_#
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//负责部分文件的抓取 *C \O]r:' **FileSplitterFetch.java }kpkHq"`f */ &^.'g{\Y package NetFox; g5)VV" i weP3u## @_{"ho import java.io.*; $4&Ql import java.net.*; ~"k'T9QBY D6w0Y:A{. 7nmo p7 public class FileSplitterFetch extends Thread { ry'(mM Lmb<)YY \IKr+wlN8 String sURL; //File URL (Gcl,IW long nStartPos; //File Snippet Start Position cc[w%jlA# long nEndPos; //File Snippet End Position yWzTHW`)Mr int nThreadID; //Thread's ID Zu,f&smb boolean bDownOver = false; //Downing is over *D,T}N boolean bStop = false; //Stop identical E'Bt1u FileAccessI fileAccessI = null; //File Access interface jkq+j^ a;K:~R+@, )n.peZ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException P]n
'q { S~T[*Z/m this.sURL = sURL; X6)LpMm this.nStartPos = nStart; SpgVsz this.nEndPos = nEnd; ^|Y!NHYH$Z nThreadID = id; -LyIu# fileAccessI = new FileAccessI(sName,nStartPos);//定位 ze-iDd_y } T1E{NgK L" o6)N nV,a|V5Xm public void run() ;c`B' { `d8TA#|` while(nStartPos < nEndPos && !bStop) /y} { V+^\SiM v,jU9D\ J?&9ofj& try{ r$KDNa$/a URL url = new URL(sURL); y;;@T X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
:9<5GF( httpConnection.setRequestProperty("User-Agent","NetFox"); L-XTIL$$ String sProperty = "bytes="+nStartPos+"-"; S'txY\ httpConnection.setRequestProperty("RANGE",sProperty); R`c5-0A Utility.log(sProperty); 4T:ZEvdzf 4Xz|HU? _#+i;$cO-X InputStream input = httpConnection.getInputStream(); %X3T<3< //logResponseHead(httpConnection); D<MtLwH &b_duWs "k.<" pf byte[] b = new byte[1024]; jzQgDed ] int nRead; 1n^xVk-G while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Fq8Z:;C8 { Jps!,Mflc nStartPos += fileAccessI.write(b,0,nRead); i|t$sBIh //if(nThreadID == 1) q45n.A6a // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z8oSh t`+ } ;.iy{&$ 5q\]] LV> TtzB[F Utility.log("Thread " + nThreadID + " is over!"); ?1YK-T@ bDownOver = true; Q8_d]V=X: //nPos = fileAccessI.write (b,0,nRead); Q-\: u~ } #u~8Txt catch(Exception e){e.printStackTrace ();} R#0UwRjeF } %n^]1R# } #r\uh\Cy =#W6+=YN8 v"j7},P@ //打印回应的头信息 L(.5:&Y=` public void logResponseHead(HttpURLConnection con) k20tn
ew { n'SnqJ&} for(int i=1;;i++) dQ<EDtap { ^Kn}{m/3Y String header=con.getHeaderFieldKey(i); "h
"vp&A if(header!=null) hGsYu ) //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^W^%PJD| Utility.log(header+" : "+con.getHeaderField(header)); (UCWSA7oc else oZQu&O' break; h T<v8 } Z',pQ{rD } 7>#74oy d4lEd>Ni N)QW$iw9 public void splitterStop() @sP?@<C { WkT4&|POJ bStop = true; ;e+ErN`a.~ } 4XRVluD%W. a$ Z06j =cxjb,r } SJ<nAX 0L'h5i>H) O[!]/qP+. /* 4g|}]K1s **FileAccess.java FbF P *//文件访问(定位,写) (f7R~le package NetFox; &T{+B:*v import java.io.*; yJ?6B LJi ~x2azY2DP d;K,2 public class FileAccessI implements Serializable{
W+e ikUG`F%W //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8< R#} RandomAccessFile oSavedFile; W_%Dg]l
long nPos; 6:H@=fEv %5'6^bT tks1*I$S< public FileAccessI() throws IOException &4LrV+`$V { yTv#T(of this("",0); L:7%W dyh } 3{CXIS p~qdkA< "~XAD(T6 public FileAccessI(String sName,long nPos) throws IOException alyWp { ol-U%J oSavedFile = new RandomAccessFile(sName,"rw"); 3:s!0ty" this.nPos = nPos; G22u+ua oSavedFile.seek(nPos); 'vBuQinn } o^mW`g8[ #>}cuC@ t~3!| @3i public synchronized int write(byte[] b,int nStart,int nLen) `$05+UU { H+` Zp int n = -1; jx J5F3d try{ nwf(`=TC oSavedFile.write(b,nStart,nLen); (V&$KDOA n = nLen; xtyOG } ^tI
,eZ catch(IOException e) `Ps&N^[ { ?|kwYA$4o e.printStackTrace (); Ch>r.OfP } )m|)cLT& f]Xh7m(Gh UZz/v#y~ return n; `fS$@{YI_ } ]@0C1r )1N~-VuT 2)-Umq{]{ } |cs]98FEf 9!;/+P 0-6rIdDTM /* "\3C)Nz? **SiteInfoBean.java Qu|H_<8g */ ;0FfP package NetFox; ,N93 H3( $i1$nc8 wNtC5 public class SiteInfoBean { :<hM@>eFn #A\@)wJ {\hjKP private String sSiteURL; //Site's URL f3^Anaa]l private String sFilePath; //Saved File's Path *PM#ngLX}r private String sFileName; //Saved File's Name ]lqLC private int nSplitter; //Count of Splited Downloading File DHQS7%)f` xa8;"Y~"bg VYbH:4K@% public SiteInfoBean() ^,}1^?* {//nSplitter的缺省值为5 zcGmru|k //default value of nSplitter is 5 a`I
\19p] this("","","",5); XlLG/N
} a@!(o )> o, PpD,, ?.Q$@Ih0 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {>g{+Eq { ia@ |+r sSiteURL= sURL; Z-:T')#Cf sFilePath = sPath; @CMEmgk~ sFileName = sName; "zj[v1K9-A this.nSplitter = nSpiltter; >
9.%hSy V_zU?}lZ^ V/`vX;% } jh(T?t$& jI Entk G>=Fdt7Oc public String getSSiteURL() 9A~w2z\G { rtNYX=P return sSiteURL; iYD5~pK8 } e.\dqt~%y <p/zm}?') DG?g~{Y~b public void setSSiteURL(String value) t'1g+g { bFjH*~
P sSiteURL = value;
pu~b\&^G } ,oykOda:| (@->AJF1\ PriLV4? public String getSFilePath() JR8|!Of@B { x$;RfK2&p return sFilePath; i-PK59VZ8f } Bv<aB(c Qk? WX
(`B k4a51[SYBK public void setSFilePath(String value) `WIZY33V { z%S$~^=b sFilePath = value; Q3Pu<j}Y } G9NI`]k h4jo<yp\ >$7x]f public String getSFileName() }4N'as/ZO { Z#.1p'3qm1 return sFileName; EB|
iW2' } :.4O
Hp1 ^3[_4av 3m= _a public void setSFileName(String value) b"WF]x|^ { -'Ay(h sFileName = value; &#L C' } D6Au)1y=& Vm|KL3}NRv ,VS(4 public int getNSplitter() <Y."()}GeH { E447'aJ return nSplitter; 5mQ@&E~#W } ?HJh;96B KF
zI27r PJiU2Y33 public void setNSplitter(int nCount) %ggf|\-e { 1l$2T
y+
= nSplitter = nCount; "h#R>3I1) } *#'j0;2F } g!R7CRt% p;>A:i :~ pGHl /* &EqLF **Utility.java /1MmOB */ 7b+r LyS0 package NetFox; U xBd14-R_ r5DRF4,7 V_:`K$ public class Utility { HD^#" ?>Sv_0 Ss+F public Utility() wkM1tKhy/ { /QY F|%7! iqvLu{ S[1<Qrv] } Up{[baWF :D*U4<
/u //线程睡眠 =..Bh8P71! public static void sleep(int nSecond) aOH|[ { ^K;k4oK try{ EY )2, Thread.sleep(nSecond); Jqj!k*=/ } H:@hCO[a catch(Exception e) zbmC?2$ { Z+&V > e.printStackTrace (); +P^
;7"H } #73pryXV } {1)A"lQu w}gmVJ#p //日志 `G qe]ZE#" public static void log(String sMsg) <Z]#vrq { "E(i< System.err.println(sMsg); o/w3b8 } 6;Z-Y>\c +4s]#{mP $Z:O&sD{ public static void log(int sMsg) SXk.7bMV6 { k
ucbI_ System.err.println(sMsg); Kcm+%p^ } 6nZ]y&$G-k } Ipk;Nq S MWXP KLyRb0V /* 5MVa;m **TestMethod.java CIx(SeEF */ {Rkd;`Q`! package NetFox; lS4r pbU_ ?H=q!i m\56BP-AM public class TestMethod { 5dePpF D5 ~w?02FU e$J>z { public TestMethod() C^L+R7 { ///xx/weblogic60b2_win.exe M]s\F(*ib try{ pR61bl) SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;Z]Wj9iY //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ij
?7MP SiteFileFetch fileFetch = new SiteFileFetch(bean); 'XK 'T\m fileFetch.start(); g&s.
0+ } N1$u@P{ catch(Exception e){e.printStackTrace ();} ,^:{!?v $-}&RW9 %T({;/ } Sc7 Ftb% 4j={ 9e< V4[-:k public static void main(String[] args) !Y ,7% { AS7L new TestMethod(); Az&>.* } ev4[4T-(@ } $Zu?Gd? 点击下载更多相关资料
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