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/* LRWM}'.s **SiteFileFetch.java |Wa.W0A */
s5G`?/ package NetFox; }^Sk.:;n3 import java.io.*; MBjAe!,- import java.net.*; w*~s&7c2B V=&M\58 _U LzA
public class SiteFileFetch extends Thread { [f {qb\ X}]A_G x'?p?u~[ SiteInfoBean siteInfoBean = null; //文件信息Bean SAitufS long[] nStartPos; //开始位置 7l/ZRz}1 long[] nEndPos; //结束位置 p<\!{5: FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~s-gnp long nFileLength; //文件长度 _UZPQ[ boolean bFirst = true; //是否第一次取文件 N)D+FV29y boolean bStop = false; //停止标志 ckV\f({ File tmpFile; //文件下载的临时信息 KkTE -$- DataOutputStream output; //输出到文件的输出流 T(Yp90'6 G0Z5 h //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) vw:GNpg'R6 public SiteFileFetch(SiteInfoBean bean) throws IOException bo DD?0.| { }:0ru_F)(4 siteInfoBean = bean; QL7.QG
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); qs\Cwn! tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); y]PuY\+ if(tmpFile.exists ()) ?+yM3As9_V { N<b2xT bFirst = false; IUEpE9_ read_nPos(); #^]vhnbN } lw~
V else K/Pw;{} { \6MM7x(U3 nStartPos = new long[bean.getNSplitter()]; 4sORp^t'Q nEndPos = new long[bean.getNSplitter()]; rp"5176
} Id`V`|q Nr]Fh Sx
J0Y8#z HnjA78%i } djnES,^%9 !"yr;t>|Zb 7T6Zlp public void run() 5y
g`TW {
$v#`2S(7 //获得文件长度 &L+.5i //分割文件 G!B:>P|\l //实例FileSplitterFetch m44a HBwId //启动FileSplitterFetch线程 ^$%
Sg// //等待子线程返回 (y6}xOa( try{ :Cx|(+T if(bFirst) }@t"B9D { 1|w@f&W" nFileLength = getFileSize(); k]$oir if(nFileLength == -1) P%Vq#5 { a:l-cZ/! System.err.println("File Length is not known!"); YU8]W% } ;/Z-|+!IJt else if(nFileLength == -2) 0,m]W) { eC%Skw System.err.println("File is not access!"); Cy/VH"G= } eCsk\f` else U+>M@!= { _4)z:?G5 for(int i=0;i<nStartPos.length;i++) LWTPNp:"{w { z7AWWr=H nStartPos = (long)(i*(nFileLength/nStartPos.length)); flC%<V%'- } =&pLlG for(int i=0;i<nEndPos.length-1;i++) 6hd<ys? { 3+uL@LXd nEndPos = nStartPos[i+1]; *-Yw%uR
} T_D] rMl nEndPos[nEndPos.length-1] = nFileLength; =$)M-;6 } \$.{*f }
LFW`ISY{ N%Ta.`r %c\kLSe //启动子线程 *5k40?w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]OdZlZBsJ for(int i=0;i<nStartPos.length;i++) 4c(Em+4 { I-g/)2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $F#
5/gDVQ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7mdd}L^h
Z nStartPos,nEndPos,i); 8Vj'&UY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7p2xst fileSplitterFetch.start(); I_z(ft. } TbNH{w|p // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MaHP):~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;9h;oB@ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %EVgS F!r nEndPos = " + nFileLength); D@68_sn // fileSplitterFetch[nPos.length-1].start(); O8bxd6xb KfBT'6t =HsE:@ //等待子线程结束 Q*%}w_D6f //int count = 0; kUS]g
r~i //是否结束while循环 `q<W %'Tb$ boolean breakWhile = false; U7D!w$4 &5R|{',(Y 'n,V*9 while(!bStop) bz#]>RD { =iKl<CqI$E write_nPos(); cXqYO|3/M Utility.sleep(500); C[
mTVxd breakWhile = true; KsOWTq"uj P* `*^r3 1,;X4/* for(int i=0;i<nStartPos.length;i++) p+V#86(3 { J,CwC) if(!fileSplitterFetch.bDownOver) \|{/.R { rfEWh
Vy(} breakWhile = false; f!#! break; %Rn*oV } S=mqxIo@m } lh"*$.j- if(breakWhile) c'eZ-\d{ break; _;;Zz&c %;dj6):@ (XVBH1p" //count++; oXnaL)Rk //if(count>4) eyyME c! // siteStop(); esnq/ } 6ABK)m-y w(6n X^ Is-[OvE System.err.println("文件下载结束!"); V9v20iX } XhM!pSl\ catch(Exception e){e.printStackTrace ();}
pzz*>Y } 87 s *lS gk%@& TB/ rYr*D[m] //获得文件长度 |M?vFF]TN public long getFileSize() b[<RcM{r} { ~.%HZzR6& int nFileLength = -1; @GFB{ ;= try{ Y"MHs0O5> URL url = new URL(siteInfoBean.getSSiteURL()); l,4O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~x9]?T httpConnection.setRequestProperty("User-Agent","NetFox");
zd=O;T;. ?qaWt/m >SK:b/i int responseCode=httpConnection.getResponseCode(); ]h,rgO; if(responseCode>=400)
L\PmT { c lB K processErrorCode(responseCode); ccHf+= return -2; //-2 represent access is error zOs}v{8" } ">oySo.B? 3O/#^~\'hW l&qnqmW< String sHeader; y'K2#Y~1e Z]]Ur !,m for(int i=1;;i++) CP~ZIIip" { \x}\)m_7M< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); cg MF?;V //Utility.log(in.readLine()); sF{aG6u sHeader=httpConnection.getHeaderFieldKey(i); X@\W*
nq if(sHeader!=null) DpT9"?g7 { g|>LT_ if(sHeader.equals("Content-Length")) 'k X8}bx { H&)}Z6C" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +P2oQ_Fk`9 break; !5o j~H } e|\xFV=4 } IW0S*mO$ else i7Up AHd/ break; }uZs)UQ|$ } y QW7ng7D0 } \l~^dn} catch(IOException e){e.printStackTrace ();} RRIh;HhX catch(Exception e){e.printStackTrace ();} |vI`u[P SeD}H=,@ -&5YRfr! Utility.log(nFileLength); aTuu",f -fq e7RgA1 return nFileLength; K*>%,mP$i } VVas>/0qr 5qb93E"C {]T?) !Vm //保存下载信息(文件指针位置) @Vre)OrN# private void write_nPos() 0<uek { Ek_5% n try{ y7,I10:D output = new DataOutputStream(new FileOutputStream(tmpFile)); =SfNA
F output.writeInt(nStartPos.length); s<s}6|Z for(int i=0;i<nStartPos.length;i++) 8=`L#FkRp { )L:zr# // output.writeLong(nPos); [IL*}M! output.writeLong(fileSplitterFetch.nStartPos); 0[MYQl` output.writeLong(fileSplitterFetch.nEndPos); Jb QK$[z" } ZZY# . output.close(); K~TwyB-h } e&}W# catch(IOException e){e.printStackTrace ();} C^J<qq& catch(Exception e){e.printStackTrace ();} Lx0nLJ\ } cS;3,#$ SVe]2ONd 9TW[;P2> ) //读取保存的下载信息(文件指针位置) D=0YLQ*rP private void read_nPos() O3} JOv_ { EwC]%BZP try{ .XJ'2yKof DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); yLnQ9BXB& int nCount = input.readInt(); XX8HSw!w nStartPos = new long[nCount]; 3uLG$`N nEndPos = new long[nCount]; q+?<cjVg for(int i=0;i<nStartPos.length;i++) VdlT+'HF { P.Z:`P) nStartPos = input.readLong(); paqGW] nEndPos = input.readLong(); *N">93: } =;rLv7(a input.close(); SqM>xm } \^!;r 9z=A catch(IOException e){e.printStackTrace ();} mZ+!8$1X catch(Exception e){e.printStackTrace ();} I/O3OD } FK _ ZE> mUBy*. 2q~.,vpP private void processErrorCode(int nErrorCode) \SWTP1 { *uc/| c System.err.println("Error Code : " + nErrorCode); IO\l8G } ^A$=6=CX DrJ?bG;[ d:%b //停止文件下载 K./qu^+k public void siteStop() ;TAj;Tf]H { \|HEe{nA bStop = true; *~#I5s\s! for(int i=0;i<nStartPos.length;i++) my (@~' fileSplitterFetch.splitterStop(); QAs)zl0 fAsb:P U,Z\)+-R } J @Hg7Faz } 6'^_*n //负责部分文件的抓取 9@ k8$@ **FileSplitterFetch.java &dyQ6i$], */ vqm|D&HU package NetFox; vpQ&vJfR /ZvP.VW& scg&"s import java.io.*; V]7/hN-Y} import java.net.*; B7%K}|Qg .shi?aWm :zY4phR public class FileSplitterFetch extends Thread { 2"IV 8y
LcTA$T Q:A#4Z String sURL; //File URL nLN0zfhE# long nStartPos; //File Snippet Start Position HpnF,4A> long nEndPos; //File Snippet End Position )w7vE\n3 int nThreadID; //Thread's ID q$:1Xkl boolean bDownOver = false; //Downing is over RkYdK$|K boolean bStop = false; //Stop identical Y%KowgP\ FileAccessI fileAccessI = null; //File Access interface `"5Ub,~ +A}t_u3< fap`;AuwK public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException r w?wi}}gn { $ L*gtZ this.sURL = sURL; q0.!T0i this.nStartPos = nStart; IZZAR this.nEndPos = nEnd; ^'`b\$km-0 nThreadID = id; )|~K&qn` fileAccessI = new FileAccessI(sName,nStartPos);//定位 x~e._k= } 5X{|*?>T I dK*IA4 \Zj%eW!m public void run() H*=cw< { }z`x-(V while(nStartPos < nEndPos && !bStop) hb`9Vn\-E { \|PiQy*_? Z@bgJL83 -CvmZ:n try{ m
Q2i$ 0u URL url = new URL(sURL); <V ?2;Gy HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _2fW/U54_ httpConnection.setRequestProperty("User-Agent","NetFox"); ..N6]u String sProperty = "bytes="+nStartPos+"-"; iLy^U*yK httpConnection.setRequestProperty("RANGE",sProperty); s= Fp[>qA Utility.log(sProperty); F9%_@n R{g=
N%O ;K<VT\ InputStream input = httpConnection.getInputStream(); wm5&5F4: //logResponseHead(httpConnection); I}`pY3 )N.3Q1g- 0L}`fYf byte[] b = new byte[1024]; TU|#Pz7n-Z int nRead; ,GSiSn while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +( LH!\{^ { #-L0.z( nStartPos += fileAccessI.write(b,0,nRead); &~:EmLgv //if(nThreadID == 1) de:@/-| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f"Sp.'@ } KuR]X``2 Y@FYo>0O l2F#^=tp Utility.log("Thread " + nThreadID + " is over!"); E !kN h bDownOver = true; '2^}de!E //nPos = fileAccessI.write (b,0,nRead); Phn^0 iF } ;Q{D]4 catch(Exception e){e.printStackTrace ();} a\P :jgF } +XWTu! } ?_eLrz4>L^ |"*P`C= >|3Y+X //打印回应的头信息 LUQ.=:mBR public void logResponseHead(HttpURLConnection con) od
`;XVG { 7KgaXi3r for(int i=1;;i++) EQyX! { nCYz];". String header=con.getHeaderFieldKey(i); ~XR('}5D if(header!=null) |lNp0b //responseHeaders.put(header,httpConnection.getHeaderField(header)); 72l:[5ccR Utility.log(header+" : "+con.getHeaderField(header)); }a" =K%b<\ else qiz(k:\o break; K|%Am4 } ^G!cv } mV}bQ^*?Z }?2X
q ^Mq/Cf_T public void splitterStop() mm>l:M TF { GCl
*x: bStop = true; Q>5f@aN } AXbb-GK tddwnpnSw Z_GGH2u } ct\msG }b: T@1;Nbz] e66Ag}Sw| /* .$\-{) **FileAccess.java 2J=`"6c *//文件访问(定位,写) =%` s-[5b package NetFox; xP\s^]e import java.io.*; #$UwJ B]_D onuG jf)cDj2 public class FileAccessI implements Serializable{ ^\PRzY ?NA$<0 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 P%R!\i RandomAccessFile oSavedFile; ?s, oH long nPos; @|A!?} Sh#N5kgD 1uw1(iL+ public FileAccessI() throws IOException .=:f]fs { W3~u J( this("",0); cW^LmA } ^_#wo" YeCnk:_ kg .]E(P
public FileAccessI(String sName,long nPos) throws IOException .u mqyU~ { `R0~mx&6G oSavedFile = new RandomAccessFile(sName,"rw"); k<*v6
sNs; this.nPos = nPos; JWHsTnB oSavedFile.seek(nPos); #`y[75<n } dOv\] DOyO`TJi sqhMnDn[ public synchronized int write(byte[] b,int nStart,int nLen) QtfL'su: { [pU(z'caS int n = -1; -W!M:8 try{ *Xnf}Ozx oSavedFile.write(b,nStart,nLen); ?=lb@U n = nLen; U-DQ?OtmC@ } +E.
D: catch(IOException e) bIm4s { 4L>8RiiQE; e.printStackTrace (); e!J5h<: } ^?{&v19m B-g-T>8 4-
QlIIf return n; }`CF(Do } )ThNy:4 C9+rrc@4 (-yif& } "]jN'N(. G+#bO5 tD`^qMua /* }Bv1fbD4U **SiteInfoBean.java xD*Zcw(vj~ */ oL9<Fi package NetFox; E 14DZ r.)n>
yLf9cS6= public class SiteInfoBean {
!RJ@;S ItLR|LO9 l!}gWd,H private String sSiteURL; //Site's URL AyQ5jkIE^{ private String sFilePath; //Saved File's Path vRtERFL private String sFileName; //Saved File's Name yW?-Z[ private int nSplitter; //Count of Splited Downloading File M gP|'H3\ B^9C}QB Sm[#L`eqW public SiteInfoBean() F3V:B.C {//nSplitter的缺省值为5 I]n X6=j5 //default value of nSplitter is 5 hpQ #`rhn this("","","",5); 1q;R+65 } 6 wd '{0O!y[H6 P'iX?+* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) g@x72$j { vE`;1UA} sSiteURL= sURL; cFie;k sFilePath = sPath; j)G%I y[` sFileName = sName; m\*ca3$ this.nSplitter = nSpiltter; H,<CR9@(5d 7kD?xHpe >/Z*\6|Zx# } I!Dx)>E& 8\E=p+C R6X2d\l# public String getSSiteURL() 8m
H6?,@6 { +Y*4/w[
return sSiteURL; =mQY%l } b&A/S$* wx-&(f +)h# !/ public void setSSiteURL(String value) zEQQ4)mA { xBc$qjV sSiteURL = value; 2.JrLBhN } %o/@0.w O.#Rr/+) KUPQ6v } public String getSFilePath() |H=5Am { n[y=DdiKGS return sFilePath; ?lqqu#;8 } &OFVqm^ ?0u"No52m 5O~xj: public void setSFilePath(String value) I;AS.y { ^x*J4jl sFilePath = value; :9&@/{W } sAO/yG wqm{f~nj= Z
OAg7 public String getSFileName() fWJOP sp*/ { g<~ODMCO?W return sFileName; 9*JxP%8T~X } fFC9:9< aiX4;'$x! f dJg7r* public void setSFileName(String value) LDw.2E
{ -A}$5/ sFileName = value; 2N-p97"g } k^JgCC+ G@e;ms1 EhD% public int getNSplitter() h`Ej>O7m { =|O]X|y-lZ return nSplitter; >yenuqIKQv } #mioT",bm= b+RU <qR eJ[+3Wh public void setNSplitter(int nCount) IY~I=} { }|-8-; nSplitter = nCount; B~Z61 }
j AoI`J } J#w=Z>oz < `{yD\qDyX = ?/6hB=7< /* e?XGv0^qu **Utility.java 7"eIZ */ kVeY} 8 package NetFox; %;_EWs/z8 i5WO)9Us x`p908S^ public class Utility { -NzOX"V]3 ^755LW @VND}{j public Utility() 1*#hIuoj' { mWoN\Rwj )abH//Pps. &a >UVs?= } yWN'va1+$ 5^qs>k[mN //线程睡眠 S=L#8CID public static void sleep(int nSecond) BB/c5?V { LEg|R+6E try{ &RS)U72 Thread.sleep(nSecond); ndBqXS } *!NW!,R catch(Exception e) $Zi{1w { >Ir?)h e.printStackTrace (); gpbdK? } MD0d } INCanE`+ !t)uRJ //日志 {)Zz4 public static void log(String sMsg) g p9;I*! { a*,V\l|6 System.err.println(sMsg); 2*-qEUl1 } :E|+[}| RLw/~ ;8]Hw a1! public static void log(int sMsg) vl`St$$| { \WUCm.w6\% System.err.println(sMsg); )>rYp
) } W"~"R } H]dN'c- K(NP%: za.^vwkBk2 /*
rd(-2,$4 **TestMethod.java $0M7P5]N*G */ |f}`uF package NetFox; +miL naO~L '7]9q#{su 5 "x1Pln public class TestMethod { >G0ihhVt 1
!.PH I=E\=UTG,5 public TestMethod() ;$r!eFY; { ///xx/weblogic60b2_win.exe Nw1 .x try{ U|+`Eth8( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hz2f7g //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Z 2uU'T SiteFileFetch fileFetch = new SiteFileFetch(bean); Hw#yw g fileFetch.start(); Yk7^?W } =lh&oPc1 catch(Exception e){e.printStackTrace ();} JS >"j d# ~W gO{@Mw r_V^sX } Ys5Iqj=mp gF M~M( YL4yT`* public static void main(String[] args) ?I.bC { 57N<OQWf new TestMethod(); @<1T&X{Z! } ?`SBGN; } y0t-e 点击下载更多相关资料
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