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/* /lC,5y **SiteFileFetch.java H&8~"h6n */ Wks zNh package NetFox; .sc80i4 import java.io.*; [,MaAB import java.net.*; T
Xiu/g( ; GE6S{~- k`o8(zPb public class SiteFileFetch extends Thread { qzNXz_#+u S|xwYaoy% /Xj{]i3{ SiteInfoBean siteInfoBean = null; //文件信息Bean dWi<U4 long[] nStartPos; //开始位置 7O8 @T-f+2 long[] nEndPos; //结束位置 o~9sO=-O FileSplitterFetch[] fileSplitterFetch; //子线程对象 f[vm]1# long nFileLength; //文件长度 TQ:h[6v boolean bFirst = true; //是否第一次取文件 <2oMk#Ng^ boolean bStop = false; //停止标志 GGo~39G File tmpFile; //文件下载的临时信息 (f^/KB= DataOutputStream output; //输出到文件的输出流 t^Lb}A#$4 U.V/JbXX //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) dGj0;3FI% public SiteFileFetch(SiteInfoBean bean) throws IOException }D+ b`, { PPySOkmS3 siteInfoBean = bean; nj;3U^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8N"WKBj|_d tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); nt()UC`5 if(tmpFile.exists ()) <XDnAv0t { gfIS bFirst = false; e_3jyA@v read_nPos(); Hik=(pTu> } 4[kyzz x else 3w |5%` { Vq-Kl[-| nStartPos = new long[bean.getNSplitter()]; >m;nt}f'+ nEndPos = new long[bean.getNSplitter()]; 6S{F4v2/0 } nu1XT 1q1
*BM#fe s1::\&`za k\SqDmv } <Rn-B).3bs U<sGj~"# R6Md_t\ public void run() tl~ZuS/ { _e>N3fT //获得文件长度 Pn9;&`t //分割文件 /E\04Bs //实例FileSplitterFetch a]5y
CBm //启动FileSplitterFetch线程 W,yLGz \ //等待子线程返回 V{q*hQd_3 try{ M"p%CbcI] if(bFirst) $")Gd@aR { t$t'{*t(
T nFileLength = getFileSize(); i!UT = if(nFileLength == -1) x_<#28H! { pYAKA1F System.err.println("File Length is not known!"); eE
.wnn } &3"ODAp' else if(nFileLength == -2) c1FSQ
m81 { > vXJ9\ System.err.println("File is not access!"); A ep](je } r
20! else @@\px66 { _!,2"dS for(int i=0;i<nStartPos.length;i++) ju;OQC~[L] { XA>uCJf nStartPos = (long)(i*(nFileLength/nStartPos.length)); `~lG5| } Fz<1xyc( for(int i=0;i<nEndPos.length-1;i++) e2V;6N { GoX<d{ nEndPos = nStartPos[i+1]; 1uKIO{d@ } <v_Wh@m nEndPos[nEndPos.length-1] = nFileLength; A-L)2.M } %q;y74 } daSx^/$R +.^pAz U}R VFnxj52< //启动子线程 e8:O2!HW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Ny`SE\B+/ for(int i=0;i<nStartPos.length;i++) mbIHzzW> { `k9a$@Xg fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xc
G siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), eqU y> nStartPos,nEndPos,i); 7)x788Z6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cB 1NN< fileSplitterFetch.start(); s)kr=zdyo } ]/?$DNjCc // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @`rC2-V siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); jG/@kh*m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8qv>C)~~` nEndPos = " + nFileLength); -N1X=4/fg // fileSplitterFetch[nPos.length-1].start(); S2~im?^21
"lBYn 2W =O~Y6| //等待子线程结束 S 0mt8/ M //int count = 0; )bB
Va^ //是否结束while循环 d{c06(#_ boolean breakWhile = false; E-HK=D&W/ ~4`3p=$
lN[#+n while(!bStop) o65I(` { _5v]69C# write_nPos(); fvZ[eJ Utility.sleep(500); Ihx[S!: breakWhile = true; ME'LZ"VT k,jcLX. 'OsRQ)E for(int i=0;i<nStartPos.length;i++) ~.J{yrJ& { $%?[f;S3, if(!fileSplitterFetch.bDownOver) }ZfdjF8N! { hU5_ dV breakWhile = false; x{$/|_ break; \!Ap< } 3Hh u]5 } X ="]q|Z if(breakWhile) ~5n?= break; 9PJnKzQ4 w9CX5Fg 71,GrUV: //count++; O5A]{W //if(count>4) eY3<LVAX // siteStop(); MUMB\K*$ } HnY.=_G !+n'0{ 4 }*V=>z System.err.println("文件下载结束!"); z]1g;j } e}2[g catch(Exception e){e.printStackTrace ();} Cuo"6, M } /_tN&[ j`_tb
qex::Qf //获得文件长度 7}vx]p2 public long getFileSize() @Zfg]L{Lr { SHqz&2u int nFileLength = -1; L:Me try{ r9~I R URL url = new URL(siteInfoBean.getSSiteURL()); UDHMNubB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -8&P1jrI httpConnection.setRequestProperty("User-Agent","NetFox"); J&;' gT N7Kkz
/ ._`?ZJ int responseCode=httpConnection.getResponseCode(); k(_^Lq f- if(responseCode>=400) B'D~Q { h{CyYsQ processErrorCode(responseCode); &&te(DC\ return -2; //-2 represent access is error Qe]aI7Ei } >%85S >e 6#kK RHuc#b0 String sHeader; cd)}a_9 }*vO&J@z i[PksT#p for(int i=1;;i++) nT@FSt { HLl"=m1/> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); {\ogw0X //Utility.log(in.readLine()); 6R!AIOD> sHeader=httpConnection.getHeaderFieldKey(i); .a}!!\@ if(sHeader!=null) ='fN
xabB { ]wV_xZ)l^A if(sHeader.equals("Content-Length")) $H1igYc { [k7 ;^A5/ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (2r808^2 break; &(~"OD } |JTDwmR } )Z63 cr/ else 4,:)%KB"V break; ilFS9A3P } 2yA+zJ
46B } |}<!O@<| catch(IOException e){e.printStackTrace ();} HkyN$1s catch(Exception e){e.printStackTrace ();} #v:A-u >RKepV(X7 &F|Wk,y Utility.log(nFileLength); tMr$N[@r ^Rmrre`uU G3de<?K.[V return nFileLength; &_$xMM,X } u1/q8'RW 4
zipgw s7:w>,v/ //保存下载信息(文件指针位置) mH!\]fmR~ private void write_nPos() =<z~OE'lV { *|)O try{ RBOhV/f output = new DataOutputStream(new FileOutputStream(tmpFile)); [I%'\CI; output.writeInt(nStartPos.length); ,pVq/1 for(int i=0;i<nStartPos.length;i++) ufS0UD8%H { V-zF'KI[ // output.writeLong(nPos); [N1[khY` output.writeLong(fileSplitterFetch.nStartPos); WvWZzlw output.writeLong(fileSplitterFetch.nEndPos); t++\&!F } *uMtl' output.close(); R|dSjE s } mNr<=Z%b catch(IOException e){e.printStackTrace ();} K]dX5vJw' catch(Exception e){e.printStackTrace ();} `/eh } p0j-$*F Kw,ln<)2 5c3&4,,eR //读取保存的下载信息(文件指针位置) &3'zG) private void read_nPos() gj1l9>f>]a { r2>y
!Q? try{ ,ikn%l#cm DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); z;[Z'_B int nCount = input.readInt(); =s[P =d U nStartPos = new long[nCount]; ?&r>`H E nEndPos = new long[nCount]; }J\KnaKo for(int i=0;i<nStartPos.length;i++) "=XRonQZ { xm}`6B^f nStartPos = input.readLong(); j=TGe nEndPos = input.readLong(); Q-Rt } >rzpYc'~w input.close(); ;gv9J[R } DSx D531[A catch(IOException e){e.printStackTrace ();} A49HYX-l catch(Exception e){e.printStackTrace ();} j8#B } H1g"09?h6o &fWYQ'\> ^LJ?GJ$g private void processErrorCode(int nErrorCode) k84JDPu# { oFUP`p%[ System.err.println("Error Code : " + nErrorCode); 9:jZ3U } $2\k| @)s } ~#^FFe Gn%gSH/ //停止文件下载 B#;yko public void siteStop() eA(c{ { DV!) n 6 bStop = true; Bn_@R` for(int i=0;i<nStartPos.length;i++) +R?d6IjH fileSplitterFetch.splitterStop();
[{!5{k! 3xnu SOdh {|J'd+ } /^z5;aG } s8<)lO<SV. //负责部分文件的抓取 *m[ow s **FileSplitterFetch.java ?=h{`Ci^ $ */ ndIU0kq3 package NetFox; ^J=l] l ard<T}|N e.|_=Gd2/ import java.io.*; cSSrMYX2 import java.net.*; ^L1# L)o7~M 4F+n`{~ public class FileSplitterFetch extends Thread { NN9`jP2 2$O@T] 93npzpge String sURL; //File URL bvMa|;f1 long nStartPos; //File Snippet Start Position Ge>%?\ long nEndPos; //File Snippet End Position ]'F{uDm[ int nThreadID; //Thread's ID 'MHbXFM boolean bDownOver = false; //Downing is over =U5lPsiv,3 boolean bStop = false; //Stop identical x_oL~~@ FileAccessI fileAccessI = null; //File Access interface ji[O? YolO-5 #w4=kWJ[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'V5^D<1P { =x4:jas this.sURL = sURL; PL#8~e;' this.nStartPos = nStart; aNpeePF)z this.nEndPos = nEnd; 6N&S3<c4JO nThreadID = id; _G!lQ)1 fileAccessI = new FileAccessI(sName,nStartPos);//定位 IwIk;pB O } d))(hk: an 3"y6.8 q9RCXo>Y+1 public void run() \vB-0w { eiJO;%fl>l while(nStartPos < nEndPos && !bStop) 4'W| '4'b { |#x;}_>7 %6}S'yL 8z^?PZ/ try{ 0KyujU?sF URL url = new URL(sURL); h94SLj] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FX"% httpConnection.setRequestProperty("User-Agent","NetFox"); EOrWax@k$} String sProperty = "bytes="+nStartPos+"-"; ujZki.x httpConnection.setRequestProperty("RANGE",sProperty); _7YAF,@vT Utility.log(sProperty); z0V d(QL ;^:9huN X6~y+R InputStream input = httpConnection.getInputStream(); 0}q ij //logResponseHead(httpConnection); "_ b
Sy 36JVnW; y6'Fi(2yw byte[] b = new byte[1024]; |EaGKC(
int nRead; j?1\E9&4-Q while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ]nN']?{7PW { p8BA an3 nStartPos += fileAccessI.write(b,0,nRead); j3VM!/ //if(nThreadID == 1) FpE83}@".w // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); StWDNAf) } MQ2gzKw> y-}lz#N C81+nR Utility.log("Thread " + nThreadID + " is over!"); VG+Yhm<SL bDownOver = true; ;u,%an<( //nPos = fileAccessI.write (b,0,nRead); 3 S:}fPR } US'X9=b_ catch(Exception e){e.printStackTrace ();} Kwfrh? } GC H= X } d6<,R;) {g l-tRC3 J$&!Y[0 //打印回应的头信息 Ka2U@fK" public void logResponseHead(HttpURLConnection con) @fT*fv
{ NaG1j+LN for(int i=1;;i++) 5|xFY/% { 5wRDH1z@{ String header=con.getHeaderFieldKey(i); Q <^'v>~n if(header!=null)
k$}XZ,Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); kJ>l,AD/ Utility.log(header+" : "+con.getHeaderField(header)); CBs0>M/ else I
o7pp( break; <|Bh;; } }{:H0)H* } X~5TA)h;~ =bZ>>-< R7e`Wn public void splitterStop() ]XJpy-U { +kH*BhSj bStop = true; v(FO8*5DZ } !s?vj
< wz9V)_V* KKa"Ba$g } p{t2pfb zbx,qctYo$ mDvZ1aj /* {_ww1'|A **FileAccess.java ]$4 k+)6 *//文件访问(定位,写) aIRCz=N package NetFox; b,~4O~z import java.io.*; wP6~HiC bh6Mh<+ JQ%e' public class FileAccessI implements Serializable{ -/B}XNW lK9us //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ><TuL7+ RandomAccessFile oSavedFile; Od>Ta_ long nPos; >72j,0=e vXR-#MS`} a_L&*%; public FileAccessI() throws IOException 1G=1FGvP { H-nk\ K<| this("",0); ;B^G< } {Rc/Ten s59v*
/ 3K @dW"3 public FileAccessI(String sName,long nPos) throws IOException @%O"P9;s { {K09U^JU oSavedFile = new RandomAccessFile(sName,"rw"); eq<xO28z this.nPos = nPos; zM|d9TS oSavedFile.seek(nPos); ;jfjRcU } T3@wNAAU YS{])+s e/r41 public synchronized int write(byte[] b,int nStart,int nLen) bVQLj}% { [~W"$sT int n = -1; ^Gq4Yr try{ 2rB$&>}T oSavedFile.write(b,nStart,nLen); zg.' n = nLen; (Vf&,b@U_ } c;xL. catch(IOException e) d0Py[37V { |n \HxU3 e.printStackTrace (); al F*L } N0O8to}V $LRvPan` 0F8y8s return n; kUUN2 } yc8iT` c_~)#F%P Sqed* } W#P)v{K -7fsfcGM$ B[F x2r`0 /* <ap%+(!I **SiteInfoBean.java Vk5}d[[l */ [c+[t3dz package NetFox; jX-v9eaA *NS:X7p!V S;kI\; public class SiteInfoBean { Zgkk%3'^' cgNK67"( !}[cY76_ private String sSiteURL; //Site's URL yEvuTgDv private String sFilePath; //Saved File's Path PNn-@=% private String sFileName; //Saved File's Name +|SvJ private int nSplitter; //Count of Splited Downloading File c"<bq}L7S P,"z tR5zlm(} public SiteInfoBean() _%s _w) {//nSplitter的缺省值为5 FhB^E$r% //default value of nSplitter is 5 JF*JFOb this("","","",5); x5m
.MQ J } "F+
9xf&r H^Xw<Z= (
$3j public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "b*.>QuZ { &Ko}Pv sSiteURL= sURL; FTt7o'U sFilePath = sPath; =&,zWNz) sFileName = sName; q*A2>0O this.nSplitter = nSpiltter; nJ4h9`[>V .i/]1X*;r^ i^uC4S~ } JRA. ,tQc :>3&"T. p\-.DRwT` public String getSSiteURL() cF(9[8c{ { M9&tys[ KX return sSiteURL; $s]@%6f } %BG5[XQ7 >8JvnBFx= GzB%vsv95 public void setSSiteURL(String value) ,o}[q92@w { GUp51*#XR sSiteURL = value; ^@19cU?q } ~o2{Wn[" =0f8W=d:Vr ):|)/ZiC' public String getSFilePath() BuvBSLC~ {
g8x8u| return sFilePath; Q`s(T } ttKfZ0 5-3gsy/Mo U)PumU+z$u public void setSFilePath(String value) _0f[.vN { y(S0
2v>l sFilePath = value; 2kgm)-z } 'q-h
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vIKNGJ^ public String getSFileName() Sh*P^i.]+ { o{hKt? return sFileName; ;8v5 qz } $+);!?^|: #Nd+X@j 3TtW2h>M public void setSFileName(String value) NAU<?q<) { i,HAXPi sFileName = value; o MAK[$k; } t(yv \[&]kPcDl ?`XKaD!
f public int getNSplitter() 9e5UTJ { |eqDT,4 return nSplitter; k$>T(smh } +
ThKqC_ ;$i'A&)OC neBkwXF! public void setNSplitter(int nCount) '$zFGq
}} { <b\urtoJ nSplitter = nCount; 6>Cubb> } $3ILVT } Bz{
g4!ku 5-*]PAC [ n2udV /* cPbz7 **Utility.java k.ZfjX" */ :]s] =q&] package NetFox; {JgN^R<5<f Z:_y,( 1Q 2YyZiOMSc public class Utility { :9b RuUm qHCs{ u :dzU]pk%0 public Utility() "x)DE, { Y"qY@` tp<V OUa &; \v_5N6 } ho1F8TG= d%3BJ+J //线程睡眠 L
~w=O! public static void sleep(int nSecond) eW0=m:6 { 9K|lU:, try{ D;]% Thread.sleep(nSecond); .KN]a"] } 1'
m
$_ catch(Exception e) iC]lO { Ao T 7sy7 e.printStackTrace (); jhv1 D'>6 } M>@R=f } !\1 W*6U8; T;@>O^ //日志 I0K!Kcu5Iu public static void log(String sMsg) }eM<A$J { V%lGJ]ZEa System.err.println(sMsg); C`wI6! } <R>z;2c )1Nnn Y)}%SP>, public static void log(int sMsg) "Q{~Bj~ { /T[ICd2J System.err.println(sMsg); e"#D){k# } bK\WdG\; } ?4e6w @BUqQ9q: x9l0UD*+g /* j#t8Krd] " **TestMethod.java ?K {1S */ bs EpET package NetFox; 3]n@c?lw FK# E7
K 1xAFu+ public class TestMethod { %@n8
?l4 _G #"B{7 cvE.r330| public TestMethod() AAq=,=:R< { ///xx/weblogic60b2_win.exe .*-w UBr try{ :dIQV(iW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 68<Z\WP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); r>~d[,^$m4 SiteFileFetch fileFetch = new SiteFileFetch(bean); 4:&qTY)H fileFetch.start(); RB7AI!'a? } )|y2Q catch(Exception e){e.printStackTrace ();} bro RefRoCD1
1Dya?}3 } @ Rx6 >52> @D~+D@i$TW _gm?FxV: public static void main(String[] args) ,ah*!Zm.kk { +6hl@Fm( new TestMethod(); WAB0e~e:|Q } r}0C8(oq } G/z\^Q 点击下载更多相关资料
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