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/* @;fdf 3ian **SiteFileFetch.java K`j#'`/KC */ jbn{5af package NetFox; Ngu+V import java.io.*; +J]3)8y+ import java.net.*; 7zVaj"N( mNKe,H0 p<`q^D public class SiteFileFetch extends Thread { ,/m<= `*N| K;_p>bI5 xI<Dc*G SiteInfoBean siteInfoBean = null; //文件信息Bean T5-50nU,~ long[] nStartPos; //开始位置 hBLJKSv long[] nEndPos; //结束位置 aQMET~A: FileSplitterFetch[] fileSplitterFetch; //子线程对象 IJs*zzR long nFileLength; //文件长度 I&YYw8& boolean bFirst = true; //是否第一次取文件 !0fpD'f!n boolean bStop = false; //停止标志 cA`R~o"
File tmpFile; //文件下载的临时信息 WA8Qt\Q DataOutputStream output; //输出到文件的输出流 6WgGewn /+"BU-aQk //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) G!8O*4+A public SiteFileFetch(SiteInfoBean bean) throws IOException
IpoZ6DB$ { SBAq,F' siteInfoBean = bean; E6NkuBQ(( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); hh{4r} | tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G! zV=p if(tmpFile.exists ()) #v=hiL { ]"q)X{G(+ bFirst = false; dU3UCD+2y read_nPos(); @mNf(& } vXR-#MS`} else @PZ&/F^ { V Z}^1e nStartPos = new long[bean.getNSplitter()]; T#|Qexz6 @ nEndPos = new long[bean.getNSplitter()]; 1G=1FGvP } sn+i[ H-nk\ K<| :7e2O!zH_ ;B^G< } 7cK#fh"hvg {Rc/Ten &%>l9~F'~ public void run() s59v*
/ { z=N'evx~ //获得文件长度 YnNB#x8| //分割文件 {e<J}-/? //实例FileSplitterFetch (%oZgvM //启动FileSplitterFetch线程 G>M#
BuU //等待子线程返回 f:B+R try{ .*r?zDV if(bFirst) `*&*jdq&i {
PnFU{N nFileLength = getFileSize(); xA`Q4"[I if(nFileLength == -1) S?D|"#-, { pez[qs System.err.println("File Length is not known!"); 6U @3
xU` } %?<C
?. else if(nFileLength == -2) <[Q#}/$" { (VO)
Q System.err.println("File is not access!"); r'7;: } q^JJ5{36e else %Fa/82:- " { RN5\,>+ for(int i=0;i<nStartPos.length;i++) ]-bA{@tP. { PM=Q\0 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,LSF@1|Fx } (i.MxGDd for(int i=0;i<nEndPos.length-1;i++) ]N*q3 y|) { ]\v'1m" nEndPos = nStartPos[i+1]; drBWo|/ } `a["`N^ nEndPos[nEndPos.length-1] = nFileLength; lV?rC z } !?DPI) } 4+:Q" 2_x}wB0P _ ;O$ot\5 //启动子线程 )r~$N0\D fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %DqF_4U 9 for(int i=0;i<nStartPos.length;i++) A@Z&ZBDg { ? #-"YO7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3=o3VGZP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), U)=StpTT nStartPos,nEndPos,i); B0?E$8a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |+~CdA fileSplitterFetch.start(); Pg{Dy>&2`I } pZ/x,b#. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7
}4T)k(a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C;0H _ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YjdCCju nEndPos = " + nFileLength); b*',(J94 // fileSplitterFetch[nPos.length-1].start(); RgHPYf{ L}h?nWm8 ~%qHJ4C //等待子线程结束 izebQVQO* //int count = 0; azr|Fz/ //是否结束while循环 -N<s = boolean breakWhile = false; ax[-907 D?44:'x+- RI!!?hYm while(!bStop) g;i>nzf { B# |w}hj write_nPos(); $ii/Q:w T" Utility.sleep(500); Om0Z\GP= breakWhile = true; @.yp IE\ ?SK1*; i !>TVDN> for(int i=0;i<nStartPos.length;i++) b2aPo M= { "o*(i7T=n if(!fileSplitterFetch.bDownOver) *NS:X7p!V { q{ItTvL breakWhile = false; {VE\}zKF break; fJBp,{0 } g>12!2} } BD&JbH!( if(breakWhile) 3V?JX5X\ break; ]{jdar^ iOkRB[hi e%uPZ >'q //count++; oTS*k:
C' //if(count>4) luACdC // siteStop(); -|\V' } ;+'x_'a c~3OK_k V2Q2(yvdJ System.err.println("文件下载结束!"); |Gx-c
,{{ } OC nQSkj catch(Exception e){e.printStackTrace ();} QFY1@2EC } F" FGPk OBqaf
)W wb~#=6Y //获得文件长度 l ~CYxO public long getFileSize() yw `w6Z3K { X`/8fag int nFileLength = -1; w6zB uW try{
wwE`YY URL url = new URL(siteInfoBean.getSSiteURL()); |k1(|)%G HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V|e9G,z~A httpConnection.setRequestProperty("User-Agent","NetFox"); VI:
!# }enm#0Ha PN:/lIO int responseCode=httpConnection.getResponseCode(); hm*1w6 = if(responseCode>=400) )D\!#<#h { (S$ziV processErrorCode(responseCode); rV*9= return -2; //-2 represent access is error 8fRk8 } Au<NUc
2 u&z5)iU 2kzm(K String sHeader; s_S[iW`l= XZde}zUWn piIj
t for(int i=1;;i++) pKJ0+mN#" { :c[iS~ ~Y //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); w/BaaF.0 //Utility.log(in.readLine()); _^]2??V sHeader=httpConnection.getHeaderFieldKey(i); -7,xjn if(sHeader!=null) c}v>Mx { ZFpi'u.& if(sHeader.equals("Content-Length")) )65 o { <Dojl
# nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 5V5Nx(31i break; .`*h2 } Y`
t-Bg!~ } Teh
_ else -XBD WV break; i,|2F9YH } `d]D=DtH } BQ!v\1'C catch(IOException e){e.printStackTrace ();} P7np
-I* catch(Exception e){e.printStackTrace ();} CzDJbvv] 8-]\C zV {_dO Utility.log(nFileLength); 'qel3Fs" )RV.N}NU <*k]Aa3y return nFileLength; MG6taOO! } UP]X,H~stU EAafi<n Zpc R //保存下载信息(文件指针位置) n1n->l*HGP private void write_nPos() R@zl?>+ { xNDX(_U>\ try{ <4UF/G) output = new DataOutputStream(new FileOutputStream(tmpFile)); H{qQ8j) output.writeInt(nStartPos.length); W
Cz+ for(int i=0;i<nStartPos.length;i++) ip.aM#
{ ${ fJ] // output.writeLong(nPos); o&WKk5$ output.writeLong(fileSplitterFetch.nStartPos); s.y wp{EF output.writeLong(fileSplitterFetch.nEndPos); =, kH(rp2 } >wx1M1 output.close(); f4{O~?= } <E/"v catch(IOException e){e.printStackTrace ();} wP:ab catch(Exception e){e.printStackTrace ();} yvN;|R
} gLp7<gx6 vu7F>{D .$&_fUY //读取保存的下载信息(文件指针位置) )/uu~9SFd private void read_nPos() o}QtKf)W { U4PnQ
K, try{ `wrN$& DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =?9z6= int nCount = input.readInt(); fu
0]BdM nStartPos = new long[nCount]; !.\- l2f nEndPos = new long[nCount]; 4l)Q for(int i=0;i<nStartPos.length;i++) |a!y%R= { \ct7~!qM nStartPos = input.readLong(); FQ6jM~ nEndPos = input.readLong(); XQW9/AzN f } 2g'o5B\* input.close(); /D@(o`a } )Pj8{.t4 catch(IOException e){e.printStackTrace ();} x,LQA0 catch(Exception e){e.printStackTrace ();} zNg8Oq& } 67,@*cK3?J [&_c.ti #ArMX3^+w7 private void processErrorCode(int nErrorCode) d4(!9O.\ { >U4hsr05 System.err.println("Error Code : " + nErrorCode); w&U>w@H^ } q2>dPI;3T ( q8uB RxUABF8b //停止文件下载 s}m.r5 public void siteStop() 1UyQ``v/ { 0J
\hku\ bStop = true; svT1b'=\$I for(int i=0;i<nStartPos.length;i++) H<YhO&D*u fileSplitterFetch.splitterStop(); Y#[Wv1hi A08b=S :Ca]/ ]] } ;_]Z3 } >o45vB4o //负责部分文件的抓取 2p6`@8*34 **FileSplitterFetch.java
4|yZA*Q^ */ @20~R/vh package NetFox; &uX|Ksq cwK+{*ZH/ ;`p!/9il import java.io.*; dF
(m!P/R import java.net.*; Lc0yLm <Oyxzs
a
d,0*(</ public class FileSplitterFetch extends Thread { iD/r8_} wfE%` 1 Z{#;my*X| String sURL; //File URL B%~D`[~? long nStartPos; //File Snippet Start Position 3jaY\(`%h long nEndPos; //File Snippet End Position WZ#|?pJ int nThreadID; //Thread's ID 6X1_NbC boolean bDownOver = false; //Downing is over d|~A>YZ boolean bStop = false; //Stop identical k~P{Rm;F FileAccessI fileAccessI = null; //File Access interface rE WPVT OI0tgkG W5#5RK"uX public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "@h 5
SF { |N^z=g P[ this.sURL = sURL; kVG]zt2 this.nStartPos = nStart; NEY
b-#v this.nEndPos = nEnd; [p
6#fG * nThreadID = id; zSU06Y fileAccessI = new FileAccessI(sName,nStartPos);//定位 }zK/43Vx } ohy?l jT6zpi~]E 9S_N*wC. public void run() T@. $Zpz { q1d'L* while(nStartPos < nEndPos && !bStop) x?|C-v { c[a1
Md& *,Mg Xy;!Q`h( try{ .JJ^w!|># URL url = new URL(sURL); NbDfD3
1GK HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G0u3*. httpConnection.setRequestProperty("User-Agent","NetFox"); a%h'utF{[ String sProperty = "bytes="+nStartPos+"-"; #_zd`s3k httpConnection.setRequestProperty("RANGE",sProperty); Qey6E9eCA Utility.log(sProperty); C6"bGA 4Pm+0=E p| #gn<z} InputStream input = httpConnection.getInputStream(); O8J:Tw}M* //logResponseHead(httpConnection); @|2}*_3\ (ex^=fv guD?~-Q byte[] b = new byte[1024]; lQ}e"#< int nRead; &dC #nw while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @3UVl^T { =XT'D@q~W nStartPos += fileAccessI.write(b,0,nRead); wu2AhMGmw //if(nThreadID == 1) JW5SBt> // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w|1Gb[ } <_|H]^o bnWKfz5 /@*J\0h(- Utility.log("Thread " + nThreadID + " is over!"); O>![IH(L bDownOver = true; 0M?nXHA[ //nPos = fileAccessI.write (b,0,nRead); 8J-;/ } !Qg%d&q.Sx catch(Exception e){e.printStackTrace ();} ;[_w&"[6a } JqDj)}fzX } K7x,> ,yC-QFQE p2=Sbb //打印回应的头信息 x%;Q
/7&$ public void logResponseHead(HttpURLConnection con) UJ0Dy` f { Qbc62 qFu! for(int i=1;;i++) L-ZJ[#D { o6} +5 String header=con.getHeaderFieldKey(i); 0shNwV1zF if(header!=null) wFW2m //responseHeaders.put(header,httpConnection.getHeaderField(header)); Efb S*f5 Utility.log(header+" : "+con.getHeaderField(header)); P7Th94 else WAj26";M( break; {,5=U@J } '(/ZJ88JP } ,H3C\.%w\ .2xp.i{ !n`ogzOh public void splitterStop() =f)S=0U F { VesO/xG< bStop = true; o3;u*f0rWn } X-Sso9/q. PAe2hJ zN\~v } NRS!Ox {C%/>e2-% N_vVEIO9 /* 7eh|5e$@ **FileAccess.java mf26AIlkQ *//文件访问(定位,写) 5k`[a93T package NetFox; F_SkS?dB import java.io.*; tVhY=X{N? OpwZTy}1} YkcX#>, public class FileAccessI implements Serializable{ ;3n0 bKDY }*n(RnCn //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 lQ%]](a6 RandomAccessFile oSavedFile; 's{-1aW long nPos; h(;qnV'c }P$48o VY uP/WRQ{rW> public FileAccessI() throws IOException jl<rxO?-F { Rk
PY@> this("",0); s0Ii;7fA{ } &)vX7*j xDBEs* F<?e79},` public FileAccessI(String sName,long nPos) throws IOException I `44}oJ { XM/P2=; oSavedFile = new RandomAccessFile(sName,"rw"); +a&-'`7g this.nPos = nPos; h^P>pI~ oSavedFile.seek(nPos); %PG::b } *@Z/L26s;= `4cs.ab r'hr'wZ public synchronized int write(byte[] b,int nStart,int nLen) #R|M(Z">q { laM0W5 int n = -1; g 1\4Jb try{ RB_7S!qC5 oSavedFile.write(b,nStart,nLen); gKg2Ntxj n = nLen; 8w|j Z@ } yI9l*' catch(IOException e) >taS<.G { pBt/vS ad e.printStackTrace (); \n850PS } @A6\v+ih (Jfi 3 m +1p>:cih return n; 0D>~uNcT} } }H{{ @RU 1vu4}%nD 8\8uXOS } gQ
h0-Dnw ]Bs ? L6j
5pI /* $*%Ml+H- **SiteInfoBean.java uLb-
NxQ- */ dUn8Xqj1 package NetFox; d@"eWvnlZ -!MDYj +U ja~b5Tf9 public class SiteInfoBean { @( 9#\%= #hd<5+$U}l JBE'B Q@ private String sSiteURL; //Site's URL /,5`#Gte_ private String sFilePath; //Saved File's Path >w9)c| private String sFileName; //Saved File's Name q4 'x'8 private int nSplitter; //Count of Splited Downloading File |Xd[%W) 5 v~Y> $'X*L e@k public SiteInfoBean() tZa)sbz {//nSplitter的缺省值为5 B>o\;) l3O //default value of nSplitter is 5 xn@?CP`-y this("","","",5); scqG$~O) } 1q~U3'l:$ !j4C:L3F "JVzv U] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5%?La`C9[ { P,iLqat sSiteURL= sURL; )X\.Xr-6q sFilePath = sPath; 5DyN=[b sFileName = sName; c ~YD|l this.nSplitter = nSpiltter; *^c4q|G.- v! @/ ItKwB+my } 1elcP`N1 2O9dU 5b R^](X* public String getSSiteURL() )gR14a { Lj(hk@ return sSiteURL; )dF(5,y) } A>>@&c:( P>pkLP}
Vo R_vZh| public void setSSiteURL(String value) )0AE*S { ' QT(TF> sSiteURL = value; =JO|m5z8> } =oT@h
9VI U]hQ#a+ Ffj:xZ9rk public String getSFilePath() kc8GnKM&mc { Q(k$HP return sFilePath; wc bs-arH } Cqg}dXn' 2y_rsu\ J~gfMp. public void setSFilePath(String value) f`A { r-N2*uYtu sFilePath = value; lu(G3T8 } (P`{0^O"} 8ZG'?A+{ #4na>G| public String getSFileName() TWx<) { |,sUD/rt return sFileName; J@Zm8r< } ).oqlA!
XN=<s;U 5\=9&{WjND public void setSFileName(String value) ts?b[v { ,C&h~uRi#f sFileName = value; 6^{ hY^Z } lBG*P>; 82J0t}:U '12|:t&7 public int getNSplitter() #Z$6>
Xt { & p_;&P_ return nSplitter; ` V^#Sb } i $I|JJJ :-"J)^V {]D!@87 public void setNSplitter(int nCount) x;Gyo { j~Gu;%tq nSplitter = nCount; bq(*r:`" } [PX'Jer } X'?v8\mPK &2xYG{Z Jh466;
E /* [0 &Lvx **Utility.java lh#GD"^(w& */ wkJB5i^<w package NetFox; GV[%P _L$)~},cT =r-Wy.a@ public class Utility { Cg{$$&_(Hj qsk71L er#we=h public Utility() lZ)u4_ { Z,4=<;PF t91CxZQ^s f2yv7t
T } #[KwR\b{:+ :X4\4B*~ //线程睡眠 M9&tys[ KX public static void sleep(int nSecond) $s]@%6f { 8V|-BP5^ try{ zfo.S[R@ Thread.sleep(nSecond); _-!6@^+ } CIaabn
catch(Exception e) 6wu/6DO { GzB%vsv95 e.printStackTrace (); "V^jAPDXb } %[Ds-my2 } I^ >zr.zA &9ZIf#R //日志 H~G=0_S public static void log(String sMsg) CqX%V":2 { aZ0H) System.err.println(sMsg); d.}rn"(z } 8U(a&G6gn F
Qk; AQV3ZVP public static void log(int sMsg) ncA2en? { hT]p8m
aRZ System.err.println(sMsg); M^[jA](a } qt:->yiq+ } Wey\GQ`"8 'PYl%2 HkV/+ {;S~ /* ~%}g"|o **TestMethod.java d:wAI| */ 2 sOc]L:9 package NetFox; 4dok/ +Ec 4[-9$
r )Z _i[1V public class TestMethod { uB^]5sqfk nx+&
{hn( *7v PU:Q[ public TestMethod() 6,h<0j{ { ///xx/weblogic60b2_win.exe jF5JpyOc try{ &%bX&;ECzf SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); LPNv4lT[u //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |kd^]!_ SiteFileFetch fileFetch = new SiteFileFetch(bean); <qy+@t fileFetch.start(); .iS]aJJ } xD#/@E1'Y catch(Exception e){e.printStackTrace ();} .iYg RW=T MmK\|CtV $-0u`=! } %51pf uL >I!(CM":s$ zc{C+:3$^ public static void main(String[] args) 2~4C5@SxL { P>kx{^ new TestMethod(); 4HHf3j!5 } k^]~NP } ;i:7E#@ 点击下载更多相关资料
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