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/* /S29\^ **SiteFileFetch.java 2=H3yEJq */ IooAXwOF package NetFox; r^3QDoy import java.io.*; Jb'l.xN import java.net.*; ZA4NVt.yN SrMg=a BMlnzi public class SiteFileFetch extends Thread { Lf+M
+^l :r0?[#r?N, m.ib#Y)y SiteInfoBean siteInfoBean = null; //文件信息Bean y%.^|
G long[] nStartPos; //开始位置 dZnAdlJ long[] nEndPos; //结束位置 m/#)B6@A FileSplitterFetch[] fileSplitterFetch; //子线程对象 A%H" a+ long nFileLength; //文件长度 IipG?v0z~ boolean bFirst = true; //是否第一次取文件 #]nH$Kq boolean bStop = false; //停止标志 sFNB rL File tmpFile; //文件下载的临时信息 }Dk*Hs^E DataOutputStream output; //输出到文件的输出流 \!HGkmd L"Y_:l3"7 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #KA,=J public SiteFileFetch(SiteInfoBean bean) throws IOException ]Lg$p { N?`-$C ] siteInfoBean = bean; CRy;>UI //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); r+8%oWj tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]Bo !v*12 if(tmpFile.exists ()) wOH$S=Ba5, { d!0p^!3 bFirst = false; Xy{\>}i]N read_nPos(); ;m/%g{oV } #R&Dgt
else <"I#lib { N}0-L$@SL nStartPos = new long[bean.getNSplitter()]; V:?exJg9 nEndPos = new long[bean.getNSplitter()]; s;-(dQ{O } #DMt<1#: Gv,_;?7lD 8=;'kEU L\L/+yNv:G } T;(k UR')) 1n S]^`Qy) public void run() H f}-> { h
WvQh //获得文件长度 `usX(snY //分割文件 R
+H0+omj //实例FileSplitterFetch <uXZ*E //启动FileSplitterFetch线程 cPcp@Dp
//等待子线程返回 _97A9wHj try{ #Z8=z*4 if(bFirst) o#V}l^uU= { Gni<@;} nFileLength = getFileSize(); d`>'< if(nFileLength == -1) D$|@:
mW { aiP.\`>} System.err.println("File Length is not known!"); 5c?1JH62o8 } $5XE'm else if(nFileLength == -2) >3R)&N { , VT& System.err.println("File is not access!"); ml=tS, } -nP
y?>p"| else AS[yNCsjC { ^O_E
T$ for(int i=0;i<nStartPos.length;i++) 5 rpX"( { feOX]g#
nStartPos = (long)(i*(nFileLength/nStartPos.length)); qx3@]9 } w0n.Y-v4i for(int i=0;i<nEndPos.length-1;i++) b,]QfC { ;eYm+e^?. nEndPos = nStartPos[i+1]; 29R_?HBH } V gLnpPOQ nEndPos[nEndPos.length-1] = nFileLength; 92|\`\LP% } m22FOjk\ } FsI51@V72Q E<u6 js, I^h^QeBis //启动子线程 Gh3b*O_, fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; d>j`|(\ for(int i=0;i<nStartPos.length;i++) :q_(=EA { sTx23RJ9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R"NR-iU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), J[6`$$l0 nStartPos,nEndPos,i); Ke0j8| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :77dl/d% fileSplitterFetch.start(); ]"Y?
ZS;H } G:'hT=8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xVOoYr>O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fUy:TCS // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", SJ(<u2J] nEndPos = " + nFileLength); |X :"AH"S // fileSplitterFetch[nPos.length-1].start(); X
wvH eEvE3=,hg y\M]\^[7 //等待子线程结束 p*F.WxB)4 //int count = 0;
DEj6 ky //是否结束while循环 @LQe[` boolean breakWhile = false; 8G&'ED_& nksx|i l {OA2';3 while(!bStop) .xnJT2uu' { ]3B8D<p write_nPos(); L\1&$|? Utility.sleep(500); u-yVc*<, breakWhile = true; R(jp T0=8 U;
= hfUN~89; for(int i=0;i<nStartPos.length;i++) 5Oh>r K( { Uy$1X if(!fileSplitterFetch.bDownOver) MM_c{gFF { [wHGt?R breakWhile = false; -\ {.]KL break; v(5zSo } 5Q$6~\ } WX@a2c.' if(breakWhile) pP JhF8Dt break; *^|.bBG ozF173iI Qq,w6ekr //count++; kkvG= //if(count>4) W|NT*g{;M // siteStop(); a!iG;:K
} ){~]-VK ?]1_ 2\M (e,5
b System.err.println("文件下载结束!"); a#Yo^"*1 } 1?6zsA%N catch(Exception e){e.printStackTrace ();} o5k7$0:t/ } hq.XO=0" k M$@Donx o*\Fj}l- //获得文件长度 YzasT:EZN public long getFileSize() zh{:zT)(1 { NT3Ti
?J, int nFileLength = -1; %3ieR}:/e& try{ s48 { R4 URL url = new URL(siteInfoBean.getSSiteURL()); H_ecb;|mP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ix.I) httpConnection.setRequestProperty("User-Agent","NetFox"); [^rMM1^,OB (P=q&]l[ h5+L/8+J^z int responseCode=httpConnection.getResponseCode(); j,:vK if(responseCode>=400) ,\2w+L5TD { J 'qhY'te processErrorCode(responseCode); o3=2`BvJ return -2; //-2 represent access is error }iOFB&)w } 3rRN~$
+;@p'af!9 f9ziSD# String sHeader; P LHiQ: KG8:F].u( ONc-jU^ for(int i=1;;i++) OE{PP9eh { "$@Wy,yp //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); kim qm //Utility.log(in.readLine()); R:[IH2F s sHeader=httpConnection.getHeaderFieldKey(i); LBCat=d< if(sHeader!=null) @'D ,T^I { ZKk*2EK]2z if(sHeader.equals("Content-Length")) /8$*{ay { 948 lL& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); n#\ t_/\ break; ,p3moD
3 } szZ8-Y } 1I^uq>r else Pr>Pxs r& break; B '@a36 } *F_ dP } q-k~L\Ys catch(IOException e){e.printStackTrace ();} X{-@3tG<r catch(Exception e){e.printStackTrace ();} 4fuKpLA [UW%(N AJ%x" Utility.log(nFileLength); E <O:
IegZ)&_n +DpiX&^h return nFileLength; 7K.in3M( } !+F6Bf 0P%,1M3d _7k6hVQ //保存下载信息(文件指针位置) 0Na/3cz|zg private void write_nPos() -nsI5\] { 8`$lsD try{ [WAnII output = new DataOutputStream(new FileOutputStream(tmpFile)); jf|5}5kSlf output.writeInt(nStartPos.length); r/ G6O for(int i=0;i<nStartPos.length;i++) qRX:eo { KcW]"K>p! // output.writeLong(nPos); r6x"D3 output.writeLong(fileSplitterFetch.nStartPos); Gs0x;91 output.writeLong(fileSplitterFetch.nEndPos); 'IykIf } q|EE
em output.close(); /&T"w,D } ophQdJM catch(IOException e){e.printStackTrace ();} gPA),
NrN catch(Exception e){e.printStackTrace ();} Gv$}>YJ } :SUU)jLq p1mY@[A )]W|i9 //读取保存的下载信息(文件指针位置) s .xJ},E9 private void read_nPos() L<`p;? { ;OTd< try{ piy_9nk DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;FI"N@z int nCount = input.readInt(); +OTNn@!9 nStartPos = new long[nCount]; #xlT,:_:) nEndPos = new long[nCount]; BY&+fKae for(int i=0;i<nStartPos.length;i++) Kx@Papn|6 { w4"4(SR. nStartPos = input.readLong(); /HiRbwQK# nEndPos = input.readLong(); 3r]m8Hp } GK>. R<[ input.close(); >
]()#z } EAE\'9T&g catch(IOException e){e.printStackTrace ();} REaU=-m- catch(Exception e){e.printStackTrace ();} ~\C.Nm } Js'#= g6wL\g{29 55<f private void processErrorCode(int nErrorCode) eX1<zzd { Px$4.b[{_Y System.err.println("Error Code : " + nErrorCode); fzhCV } ZB|y "F.0(<4) YR\pt8(z? //停止文件下载 DNu^4#r public void siteStop() `1Cg)\&[e0 { yM}Wg~:D: bStop = true; /3>5ex>PN for(int i=0;i<nStartPos.length;i++) ]'%Z&1 w fileSplitterFetch.splitterStop(); b-Q%cxJ /xu#ZZ?8F_ c8"9Lv } (n>gC
} F6vN{FI //负责部分文件的抓取 #*"5F* **FileSplitterFetch.java z;F6:aBa */ *$4 EXwt' package NetFox; k|-P&g "PI]k vp#A D9h1 import java.io.*; Fhr5)Z import java.net.*; SCUsDr+. :hA=(iz oU`J~6.&S public class FileSplitterFetch extends Thread { l^ Q-KUI o(w xu) ap7ZT7KW String sURL; //File URL a'U}.w} long nStartPos; //File Snippet Start Position ,$xV&w8f\" long nEndPos; //File Snippet End Position )T_o!/\*|* int nThreadID; //Thread's ID oOj7y>Nm boolean bDownOver = false; //Downing is over [;E~A boolean bStop = false; //Stop identical wk'12r6=(- FileAccessI fileAccessI = null; //File Access interface M
yvyp ;]/emw=a
GW[g!66^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /&`sB| { f=f8)+5 this.sURL = sURL; y7?n;3U]CS this.nStartPos = nStart; Pm
Zb!| this.nEndPos = nEnd; X,Q'Xe/ nThreadID = id; .0 [
zZ fileAccessI = new FileAccessI(sName,nStartPos);//定位 YaWZOuxm } ST*\ Q +5>*$L%8T` 1%R8q=_ public void run() WLB@]JvTBY { *T+Bjj;w while(nStartPos < nEndPos && !bStop) f7mN,_Lt { -F+
)N$CW zK5/0zMZ ZYi."^l try{ ev$\Ns^g$3 URL url = new URL(sURL); XlPi)3m4/S HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^^O @ [_ httpConnection.setRequestProperty("User-Agent","NetFox"); zP
F0M( String sProperty = "bytes="+nStartPos+"-"; hS?pc<~`# httpConnection.setRequestProperty("RANGE",sProperty); PU"C('AP Utility.log(sProperty); bGO[P<< 6BnP"R. [#}0) InputStream input = httpConnection.getInputStream(); G1vg2'A //logResponseHead(httpConnection); FM80F_G^z [X"F}ph feI%QnK)U byte[] b = new byte[1024]; TH%J=1d int nRead; 42Qfv%*c while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Bc^%1 { wd
4]Z0; nStartPos += fileAccessI.write(b,0,nRead); s\CZ os& //if(nThreadID == 1) A$H;2T5N // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5\?\|* WT } h}T+M BA% ;AjY-w Q|gRBu Utility.log("Thread " + nThreadID + " is over!"); O>h,u[0 bDownOver = true; 3[RP:W@% //nPos = fileAccessI.write (b,0,nRead); T@S\:P } re$xeq\1P? catch(Exception e){e.printStackTrace ();} Al0
i{.V } '#;%=+=; } ;$\?o KliMw*5( "IjCuR;# //打印回应的头信息 %YH+=b:uW public void logResponseHead(HttpURLConnection con) npj_i /&g { 8n[6BF); for(int i=1;;i++) 'pa>;{ { W`qiPLk String header=con.getHeaderFieldKey(i); 8BHtN if(header!=null) Tx+Bkfj //responseHeaders.put(header,httpConnection.getHeaderField(header)); G>>`j2:y Utility.log(header+" : "+con.getHeaderField(header)); >`3wEJ"< else 3Y
L break; Hju7gP=y} } lU}y%J@ } QO-R> >R9_; Zs(I]^w;d public void splitterStop() 6rx%>\UkS { vLc7RL bStop = true; X:un4B}O } `ZC{<eVJ}= ~"Kf+eFi #lf3$Tm D } w6PKr^ J#```cB 5)T=^"IHXi /* \L-K}U>J **FileAccess.java FRSz3^A w *//文件访问(定位,写) iPD5
KsAOA package NetFox; `Wes!>Vh! import java.io.*; wU9H=w^ hZ#ydI| TSl:a & public class FileAccessI implements Serializable{ RSK~<Y@]q{ o:p6[SGd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 {N \ri{| RandomAccessFile oSavedFile; (eG9b pqr long nPos; t7t?xk!2 ~)ZMGx 8Moe8X#3 public FileAccessI() throws IOException FR7DuH/f) { R>r@I_ this("",0); t,YnweH } cJ}J4? -=tf) )r9lT*z public FileAccessI(String sName,long nPos) throws IOException \hm;p { rzR=% > oSavedFile = new RandomAccessFile(sName,"rw"); 6;O fh this.nPos = nPos; MM+xm{4l oSavedFile.seek(nPos); gJ;
*?Uq( } @scy v@5)F X\z`S##kj AM[#AZv public synchronized int write(byte[] b,int nStart,int nLen) MR) *Xh { ?$ft3p} int n = -1; \~LwlO o%R try{ ke+3J\;> oSavedFile.write(b,nStart,nLen); (9"w{pnlLc n = nLen; J'Z!`R| } n!Ic.T3PA catch(IOException e) Q)n6.%V/e { P0Q]Ds| e.printStackTrace (); gB&8TE~Y } t#fbagTON 17\5NgB xrXfLujn% return n; I3ZlKI } %![%wI? N=JZtf/i -L.U4x } NSsLuM=. UdIl5P z'W8t|m}Pb /* C1x"q9|\` **SiteInfoBean.java mMz^I7$ */ 9AA_e
~y package NetFox; EAdr}io
@hb K DX*eN"z[ public class SiteInfoBean { rz@FUU:& $jc&Tk# dN8@ 0AMSf private String sSiteURL; //Site's URL o \#C#NiT private String sFilePath; //Saved File's Path 75^U<Hz-3{ private String sFileName; //Saved File's Name 9{A[n} private int nSplitter; //Count of Splited Downloading File ^|P/D -$x5[6bN 0LjF$3GpZ public SiteInfoBean() g }%$VUSA {//nSplitter的缺省值为5 +K@wh //default value of nSplitter is 5 fMRv:kNAt this("","","",5); C:?mOM#_ } dR^7d _! Oi?+Z:lak }[$qn| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $4*wK@xu { .# Jusd sSiteURL= sURL; 5>S<9A|Q sFilePath = sPath; aw3 oG?3I sFileName = sName; l2&s4ERqSm this.nSplitter = nSpiltter; VJ8"Q ]1^F "1-gMob } oZ/z{` /^2&@P7 wT taj08D public String getSSiteURL() A#&,S4Wi| { h&k*i return sSiteURL; (59u<F } BDO]-y \qo}}I>e 0+iaO"% public void setSSiteURL(String value) ?k}"g$JFn { 8Hf:yG, sSiteURL = value; &nRbI:R } qgk-[zW# .!B>pp(9 ~+HZQv3Y public String getSFilePath() |})7\o { >l$qE return sFilePath; cD6T4 } S,* <Rno; /}ADV2sF public void setSFilePath(String value) A_ftf7, { -(Z%?]+ sFilePath = value; 3jJd)C R } ` 465
H 2JMMNpya /_?y]Ly[r public String getSFileName() ZJod=^T { 4)DI0b" return sFileName; 88}=VS } ,P T5-9 m l>J>?b=x"[ 4(hHp6}b public void setSFileName(String value) ,lUroO^^ {
g%.;ZlK sFileName = value; egd%,` } PdkS3Hz iVQ)hsW/ 0o>l+c public int getNSplitter() f\zu7,GU { Vt[Kr return nSplitter; $ lC*q } i:@n6GW+iw "h84D&V G(*7hs public void setNSplitter(int nCount) S+LS!b { HXg#iP^tv nSplitter = nCount; VOa7qnh4:[ } #K4lnC2qz } >}p'E9J?r xV}ybRKV q
?qpUPzD /* ,5
A& **Utility.java B S^P&TR! */ +J+[fbqX package NetFox; (TF;+FRW PIthv[F @5)THYAx4 public class Utility { {0ozpE*( g(b:^_Nep PAcbC|y public Utility() tw*n+{]hi { Cbq|<p# #o Z4ZR]eD _l$1@ } WNa#X]*E) L*'3f~@Q //线程睡眠 8YLS/dN0 w public static void sleep(int nSecond) /5s,<
0Kz { 7XDze(O5 try{ ZQ_&HmgRy Thread.sleep(nSecond); vrr`^UB2 } :VvJx] catch(Exception e) x$WdW+glZ- { l`'
lqnhv e.printStackTrace (); /iwL$xQQ } -|/kg7IO\ } NA<6s]Cs. gT=RJB //日志 .o"FT~}z public static void log(String sMsg) xtN=?WjVe0 { *
SHQ[L4{ System.err.println(sMsg); l}aJRG6U } re%MT@L# 4or8fG .%3qzOrN public static void log(int sMsg) efnj5|JSV { E{#Y= System.err.println(sMsg); J nzI-
y } 1oVjx_I5y } L74Sx0nk= 28jm*Cl8 GO|EeM!iB /* \.AI;^)X@] **TestMethod.java L[LgQ7esQ */ ;i,:F`b~ package NetFox; !arTR.b\ 6z2_b wo eCI0o5U public class TestMethod { >RL|W}tI4 /U1 jCLR' J]=2] oI2 public TestMethod() w?db~"T { ///xx/weblogic60b2_win.exe UZqQ|3 try{ :
~R:[T2P SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); y9@DlK //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =w/S{yC
SiteFileFetch fileFetch = new SiteFileFetch(bean); %x5zs ]4^ fileFetch.start(); [ ]LiL;A& } "p[FFg catch(Exception e){e.printStackTrace ();} 320g!r ?->&)oAh VdfV5" } pSml+A: ap%
Y} h4 X > public static void main(String[] args) H>/LC* 8- { MY$-D+#/` new TestMethod(); U(t_uc5q } iI.d8}A } G"'[dL)N> 点击下载更多相关资料
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