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/* /E3~z0 **SiteFileFetch.java E62_k
0q */
AQ0zsy package NetFox; ej7L-~lxQ import java.io.*; zK I1 import java.net.*; n1aOpz6` JP(0/?Q | #b/EA9 public class SiteFileFetch extends Thread { qQIX:HWDKZ sgnc$x" @^J>. g SiteInfoBean siteInfoBean = null; //文件信息Bean nN^lY=3 long[] nStartPos; //开始位置 unNN&m#@ long[] nEndPos; //结束位置 NB5lxaL FileSplitterFetch[] fileSplitterFetch; //子线程对象 %%#bTyF long nFileLength; //文件长度 <Ql2+ev6 boolean bFirst = true; //是否第一次取文件 24
.'+3 boolean bStop = false; //停止标志 GvvKM=1 File tmpFile; //文件下载的临时信息 cj^hwtx DataOutputStream output; //输出到文件的输出流 xj9xUun *K&
$9fah //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F(ZczwvR public SiteFileFetch(SiteInfoBean bean) throws IOException dWu;F^ { Lxv6\3I+ siteInfoBean = bean; 6$kh5$[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q: X^V$` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 3[m2F O,Z if(tmpFile.exists ()) tv Zq):c { lon9oraF' bFirst = false; U(Bmffn4Z read_nPos(); fz?woVn } :`lP+y?a1 else m>3\1`ZF~< { o?cNH nStartPos = new long[bean.getNSplitter()]; jP0TyhM nEndPos = new long[bean.getNSplitter()]; eKLE^`2*@ } }$sTnea Ck>]+rl KfYT v T
@25 } g3yZi7b5FU Gm3`/!r =q|//*t2 public void run() :Rnwyj]) { nywC]T //获得文件长度 ep0dT3& //分割文件 Dd,i^,4Gj //实例FileSplitterFetch -1~o~yGE //启动FileSplitterFetch线程 UI'fzlB //等待子线程返回 Ino]::ZJ/ try{ B9Wd
' if(bFirst) 6.$z!~8 { (i?9/8I nFileLength = getFileSize(); 9Zmq7a
E if(nFileLength == -1) |7 Ab_ { 9]lyV System.err.println("File Length is not known!"); A_e5Vb,u. } {t.S_|IE else if(nFileLength == -2) (uy\~Zb { A0,e3gb System.err.println("File is not access!"); _
b</
::Tp } hs:iyr]@9 else ie>mOsz { sTep2W.9 for(int i=0;i<nStartPos.length;i++) 1)qD)E5&cf { 5R%y3::$S nStartPos = (long)(i*(nFileLength/nStartPos.length)); +EqL| } 0%Y}CDn_ for(int i=0;i<nEndPos.length-1;i++) (_+ux1h6^ { [d-Y1 nEndPos = nStartPos[i+1]; R=$}uDFmW } ^<uQ9p^B nEndPos[nEndPos.length-1] = nFileLength; V]"pM]>3X } tA,J~|+f: } HD1/1?y!@q JiuA"ks) U.b|3E/^ //启动子线程 (<@`MPI\@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k7L4~W for(int i=0;i<nStartPos.length;i++) rz2,42H] { ${}9/(x/^ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2- (}=N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~O!E &~ nStartPos,nEndPos,i); -v|lM8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); k,; (`L fileSplitterFetch.start(); *J
>6i2M,u } <OJqeUo+*\ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M'oZK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .2_xTt // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", LyR<cd$W nEndPos = " + nFileLength); A:(qF.Tm // fileSplitterFetch[nPos.length-1].start(); QFoCi& X?JtEQ~> p,uM)LD
//等待子线程结束 Q`4Ia<5B //int count = 0; }W[=O:p //是否结束while循环 h|ib*%P_ boolean breakWhile = false; 1jAuW~ eNM"e- 2+pXtP@O while(!bStop) w>}n1Nc$G { ) ]<^*b> write_nPos(); hJw]hVYa Utility.sleep(500); &OEBAtc/ breakWhile = true; {ot6ssT=D =<zlg~i "(kiMog- for(int i=0;i<nStartPos.length;i++) E9t8SclV { "Vp:Sq9y if(!fileSplitterFetch.bDownOver) l8_RA { fA[T5<66 breakWhile = false; :Z_abKt break; '?fGI3b~/ } (v:8p!QN } C7}iwklcsa if(breakWhile)
klY, @ break; twK 3 RyM29uD IjQgmS~G //count++; FL&Y/5 //if(count>4) =^l`c$G< // siteStop(); ">S1,rhgS } w\V<6_[vv. 7s2*VKr kho0@o+'^ System.err.println("文件下载结束!"); "gDk?w } JE*?O*&|Q catch(Exception e){e.printStackTrace ();} :<0lC j } wyAh%'V p6)6Gcx |
>yc|W //获得文件长度 9 }42s + public long getFileSize() J~ +p7S {
fD8GAav int nFileLength = -1; k)y<iHR_o try{ A1z<2.R URL url = new URL(siteInfoBean.getSSiteURL()); Y$j!-l5z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hewc5vrL httpConnection.setRequestProperty("User-Agent","NetFox"); P=9UK`n &zVXd }jFRuT;35 int responseCode=httpConnection.getResponseCode(); PpNG`_O if(responseCode>=400) ^EW6}oj[ { NqFfz9G) processErrorCode(responseCode); hw)z] return -2; //-2 represent access is error
J9y}rGO } +bb-uoZf wqap~X S@~ReRew2 String sHeader; R?N+./{ Nd@/U
c 02(Ob for(int i=1;;i++) c|(Q[= { $YJi]:3& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); wsc=6/#u //Utility.log(in.readLine()); 3vQVk sHeader=httpConnection.getHeaderFieldKey(i); m")p]B&i= if(sHeader!=null) 0Jd>V { Z[,,(M if(sHeader.equals("Content-Length")) l2wu>Ar7. { d>r ]xXB6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); J*ZcZ FbWN break; I).eQ8: } L}_VT
J } { Q!Xxe>6 else +apn3\_ break; c]qh)F$s8 } :3J`+V}9; } r/0AM}[!*j catch(IOException e){e.printStackTrace ();} qNMYZ0, catch(Exception e){e.printStackTrace ();} $?LegX oJ#;X R tn(6T^u Utility.log(nFileLength); lYr4gFOs e"p){)*$ ec*Ni|`Z' return nFileLength; 9J<vkxG9` } jxYze/I 1,we:rwX cA|
n*A-j< //保存下载信息(文件指针位置) _=cuOo"! private void write_nPos() 0wF)bQv1 { %/!f^PIwX try{ !RjC0, output = new DataOutputStream(new FileOutputStream(tmpFile)); ,Hp7`I>/ output.writeInt(nStartPos.length); r CUs for(int i=0;i<nStartPos.length;i++) }We-sZ/w7r { 3-[+g}kak? // output.writeLong(nPos); 1&Mpx!K*T output.writeLong(fileSplitterFetch.nStartPos); 58`Dcx,yJ output.writeLong(fileSplitterFetch.nEndPos); %/_E8GE
} +vV?[e output.close(); , 0?_?
GO } ^$rqyWZYp catch(IOException e){e.printStackTrace ();} <u?\%iJ" catch(Exception e){e.printStackTrace ();} 6\y?+H1 } 'I>geW?{QK 1p<*11 li#ep?5h^ //读取保存的下载信息(文件指针位置) gnf4H
V~ private void read_nPos() 6J cXhlB` { wX!0KxR/Z try{ SWT)M1O2 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \vpX6!T int nCount = input.readInt(); f>Tn#OW nStartPos = new long[nCount]; VmXXj6l& nEndPos = new long[nCount]; >]Dn,*R for(int i=0;i<nStartPos.length;i++) BXytAz3 { /NuO>kQa nStartPos = input.readLong(); (ti E%nF+ nEndPos = input.readLong(); 6.|[;>Km } .5A .[ZY) input.close(); C0ORBp } "od2i\ catch(IOException e){e.printStackTrace ();} =t|,6Vp catch(Exception e){e.printStackTrace ();} 7dR]$~+*e } '
wp _U/ "wxyY^" H5CL0#I private void processErrorCode(int nErrorCode) LF+E5{=:R { a?X@ D<.; System.err.println("Error Code : " + nErrorCode); xF
3Z> } $j4/ohwTDY &,\my-4c> wz Y{ii //停止文件下载 EK\xc'6M public void siteStop() 3]7j,1^ { vSCJ xSt#e bStop = true; 8LY^>. for(int i=0;i<nStartPos.length;i++) )d{fDwrx1 fileSplitterFetch.splitterStop(); [<jU$93E F8\JL % 8RS@YO } @R`Ao9n9V } 0])[\O`j //负责部分文件的抓取 8}Q2!,9Q **FileSplitterFetch.java bH%d* */ {.Brh"yC package NetFox; I:;umyRH ?0:=+%. L3s"L.G import java.io.*; d9 l2mJzW import java.net.*; XXXQA Y-,C vu:] [2"0 m.lzkS]P public class FileSplitterFetch extends Thread { p]7IoO
-@ iUZV-jl2/ H6lZ<R{= String sURL; //File URL +.uQToqy long nStartPos; //File Snippet Start Position VWk{?*Dp long nEndPos; //File Snippet End Position f`[E^zj int nThreadID; //Thread's ID iAt&927 boolean bDownOver = false; //Downing is over p ^)3p5w boolean bStop = false; //Stop identical q-/t?m0 FileAccessI fileAccessI = null; //File Access interface t"vkd w=5<mw mgb+HNH%q\ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException tCv}+7) { F4IU2_CnPD this.sURL = sURL; )`mBvS.} this.nStartPos = nStart; Sf2xI' this.nEndPos = nEnd; %Y9CZRY9 nThreadID = id; vX&W;& fileAccessI = new FileAccessI(sName,nStartPos);//定位 /*t H$\6* } gO m8 O, {/qQ=$t O.jCDAP public void run() z:&/O&? { -Q|]C{r while(nStartPos < nEndPos && !bStop) ~"8r=8| { RSnBG" WS%yV|e /0XmU@B try{ ^zfs8]QSf URL url = new URL(sURL); #K!"/,d@>J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )^
P Wr^ httpConnection.setRequestProperty("User-Agent","NetFox"); I^[[*Bh*C String sProperty = "bytes="+nStartPos+"-"; $ <3^( y httpConnection.setRequestProperty("RANGE",sProperty); ,}NTV~ Utility.log(sProperty); -wh Zg|l:^E 4zZ.v"laVM InputStream input = httpConnection.getInputStream(); x~](d8*= //logResponseHead(httpConnection); Vd'=Fe;eB Xv+,Z<>iQ D2RvFlAXu byte[] b = new byte[1024]; \m=k~Cf:f int nRead; E;An':j while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &q#.
> { ^z51f>C nStartPos += fileAccessI.write(b,0,nRead); ` }B,w-,io //if(nThreadID == 1) ')Y1cO // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e$&n)>% } 5<P6PHdY
*U`R<mV\ AS'+p %( Utility.log("Thread " + nThreadID + " is over!"); 8isQL bDownOver = true; bCiyz+VyJn //nPos = fileAccessI.write (b,0,nRead); *;U<b } 4[)tO-v:Y catch(Exception e){e.printStackTrace ();} 7`&6l+S| } JEF ;Q } x~K79Mya l hST%3Ld +,j6dYub //打印回应的头信息 IR8yE`(h public void logResponseHead(HttpURLConnection con) 7y_<BCx
h { \ _?d?:#RD for(int i=1;;i++) T1'\!6_5 { 5=R]1YI~$ String header=con.getHeaderFieldKey(i); GInw7 if(header!=null) ZZi|0dG4; //responseHeaders.put(header,httpConnection.getHeaderField(header)); EK&0Cn3z Utility.log(header+" : "+con.getHeaderField(header)); PKQ.gPu6*@ else "8~PfLJ+ break; ,H1K sN } }F|B'[wn } hE<Sm*HU EV7lgKM^ &xp]9$ public void splitterStop() l=x(
{ /!qP=ngw9 bStop = true; 3[8p,wx } C~C`K%7 X,{[R | Av4(=}M}@ } ) $0>L5d: mu5r4W47 HJP~
lg /* |dDKO **FileAccess.java ZT8LMPC *//文件访问(定位,写) &9"Y:), package NetFox; }6=?
zs} import java.io.*; t0Jqr)9}6 ?Iq{6O>D. 4Z5;y[k( public class FileAccessI implements Serializable{ V^rL 5=%KK3 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 iio-RT?! RandomAccessFile oSavedFile; Kmw #Q` long nPos; .Lu3LVS *z.rOY=
8 }D.\2x(J public FileAccessI() throws IOException X5)(,036 { 9,JWi{lIv this("",0); Et0)6^-v } ;cZp$
xb3 cBv"d ~ z;ku*IV public FileAccessI(String sName,long nPos) throws IOException _"*s x- { UtQCTNjC{ oSavedFile = new RandomAccessFile(sName,"rw"); zx*D)i5- this.nPos = nPos; hljKBx~ oSavedFile.seek(nPos); _O;4> } CGkx_E] B^/k`h6J o\; hF3 public synchronized int write(byte[] b,int nStart,int nLen) U<E]c 4* { D wr 9}Z-] int n = -1; Bf6i{`!G try{ Nwe-7/Q oSavedFile.write(b,nStart,nLen); 0s\ -iub=d n = nLen; X8-x$07) } ?~(#~3x catch(IOException e) @|bJMi { mx
UyD[| e.printStackTrace (); /Ov1eQBNG } R/kJUl6HEl L#J2J$= &`m$Zzl;
return n; `j!_tE` } y7%SHYC p[ gVI`&W__, %QEyvl4 } L]u^$=rI P}qpy\/(4 _:WNk( /* x+;y0`oL **SiteInfoBean.java =N8_S$nx( */ FOsxId[f9 package NetFox; jA[Ir3 >EZZEd -ZyY95E< public class SiteInfoBean { ek]nLN E@n~ @|10 lI+^}-< private String sSiteURL; //Site's URL Nu\<Xr8 private String sFilePath; //Saved File's Path f-ceDn private String sFileName; //Saved File's Name xSNGf@1b private int nSplitter; //Count of Splited Downloading File c!'\k,ma<9 &I(\:|`o ?u/UV,";y public SiteInfoBean() {?2|rv) {//nSplitter的缺省值为5 'W>y v //default value of nSplitter is 5 }L&LtW{X this("","","",5);
3bR%#G% } ^SKHYo`,,N o4J@M{xb_ g_N^Y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Jj5VBI!Ok {
S~E@A.7 sSiteURL= sURL; {
0&l*@c& sFilePath = sPath; <VutwtA sFileName = sName; s{8=Q0^ this.nSplitter = nSpiltter; G--(Ef%v' BV
}CmU&DA YOj&1ymBZ } &/ED.K RqP_^tB RyG6_G} public String getSSiteURL() B]:|;d { BzkfB:wr return sSiteURL; F|qMo| } DV[FZ -mn/Yv vy{k"W&S public void setSSiteURL(String value) G%;>_E { '3Q~y"C+4 sSiteURL = value; D~U RY_[A } ey,f igjd. f 1+ VB#&`]rdo public String getSFilePath() R!
On { EP>Lh7E9n return sFilePath; c@"FV,L> } 4,Oa(b <\O8D0.d dJ Q K|/ public void setSFilePath(String value) W5= j&&|! { EhM=wfGKw sFilePath = value; bgKC^Q/F } FI.F6d)E$ -!\%##r7~ P=KhR&gwV~ public String getSFileName() x<Gjr} { *78c2`)[ return sFileName; m-ibS: } UZrEFpi O(!;7v} #+V4<o public void setSFileName(String value) cL~WDW/ { -,T!/E sFileName = value; V,0$mBYa } dcD#!v\0 &rD8ng+$ D4|Ajeo;1 public int getNSplitter() /4 OmnE; { k ,+,,W return nSplitter; 6 U[VoUU } =~Qg(=U0U z rG VPuR4p. public void setNSplitter(int nCount) naH(lz|v { %.r\P@7/Q nSplitter = nCount; p9u*l } A%HIfSzQBS } /|P{t{^WM k'H[aYMA nKS*y* /* *AQ3RA 8 **Utility.java : [328X2 */ ".$kOH_: package NetFox; 'j,
([ 0XCAnMVo LjE3|+pJ public class Utility { G?=&\fg_: jll:Rh(b ,>7dIJqzw public Utility() 3*2~#dh= { 9T5 F0?qd ~ZSX84~@u LQ4:SV'3 } fW+"Kuw {d;z3AB //线程睡眠 IF|;;*Z8 public static void sleep(int nSecond) f<VK\%M { M!Ao!D[ try{ 0#eb] c Thread.sleep(nSecond); [J}eNprg } ?HZ^V catch(Exception e) WPNw")t! { WQ[nK5# e.printStackTrace (); =FV(m
S } tlUh8os } 7<MEM NYX d94k //日志 D:bmq93PC public static void log(String sMsg) gDLS)4^w { EJTM
>Rpor System.err.println(sMsg); nb=mY&q}~ } 6)*fr'P .!0Rh9yyl 9?O8j1F public static void log(int sMsg) 4s9@4 { +
c3pe4 System.err.println(sMsg); *->*p35 } mHW%:a\L } Gt*K:KT=L 0Atha>w^o~ h+j^VsP zB /* z{\tn.67 **TestMethod.java `14@dk
*/ }BI6dZ~2A package NetFox; y,|2hrj/0E s9CmR]C W-#DEU 7_ public class TestMethod { wzju)q S XF)N_}X^ 6d;}mhH public TestMethod() Bt}90# { ///xx/weblogic60b2_win.exe cpP}NJb0;% try{ S9}I SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); P4_B.5rrJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5);
d9k` SiteFileFetch fileFetch = new SiteFileFetch(bean); v9Ii8{ca| fileFetch.start(); pMHl<HH } \zg R]| catch(Exception e){e.printStackTrace ();} 9]l I?j]o 6_QAE6A ~&T U } iD|~$<9o '%ilF1# \u[} public static void main(String[] args) HYGd
:SeH { p:y\{k" new TestMethod(); =O0A(ca"g } }RadbJ{q= } RVwS<g)~1 点击下载更多相关资料
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