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/* 6H:'_|G **SiteFileFetch.java 99mo]1_ */ B>{\qj)% package NetFox; F3,djZq import java.io.*; {WYmO1 import java.net.*; c:f++|| <Q%:c4N GTBT0$9g. public class SiteFileFetch extends Thread { _>)=c<HL z ;KUIWg -7\6j#;l SiteInfoBean siteInfoBean = null; //文件信息Bean uL[%R2 long[] nStartPos; //开始位置 -mPrmapb3 long[] nEndPos; //结束位置 7iM;X2=7} FileSplitterFetch[] fileSplitterFetch; //子线程对象 % m0x] long nFileLength; //文件长度 69tT'U3vb$ boolean bFirst = true; //是否第一次取文件 7J$5dFV2 boolean bStop = false; //停止标志 wG2-,\: File tmpFile; //文件下载的临时信息 Q{))+'s2h DataOutputStream output; //输出到文件的输出流 'h~I#S4! EHC^ [5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #{L
!o5 public SiteFileFetch(SiteInfoBean bean) throws IOException R$xk cg2( { u,Rhm-` siteInfoBean = bean; Vo-]&u&cr
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4}t&AW4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v*.#LJEm if(tmpFile.exists ()) DfL>fk { AG==A&d>$ bFirst = false;
W;9Jah. read_nPos(); %G>|u/:U } k3FpD=N else x[i Et%_ { G*$a81dAX nStartPos = new long[bean.getNSplitter()]; VtJy0OGcRP nEndPos = new long[bean.getNSplitter()]; T.j&UEsd } g0~3;y }^/;8cfLY `9yR,Xk=l \mt>R[ } X/!37 H@R2mw fpK` public void run() =P"Sm
r { Z" !+p{u //获得文件长度 xK8R![x //分割文件 S3( 2.c~ //实例FileSplitterFetch >|e>= //启动FileSplitterFetch线程 9v2(cpZ //等待子线程返回 [Y^1}E* try{ }:5>1FfX= if(bFirst) ;*8nd-\ { !Ho=(6V nFileLength = getFileSize(); mp x/~`c if(nFileLength == -1) Q(e 3-a { 0Q_@2 System.err.println("File Length is not known!"); al3[Ph5G } wc
!
v /A else if(nFileLength == -2)
LbeMP { 0- 'f1 1S System.err.println("File is not access!"); ,B<Tt|' } &3;yho8v@ else G$buZspL'd { 389puDjy for(int i=0;i<nStartPos.length;i++) `*1059 { ^9Je8 @Yu nStartPos = (long)(i*(nFileLength/nStartPos.length)); "[LSDE"( } VC6S4FU4K for(int i=0;i<nEndPos.length-1;i++) [Bz'c1 { uPtHCP6 nEndPos = nStartPos[i+1]; sa71Vh{ } &2!F:L nEndPos[nEndPos.length-1] = nFileLength; .7nr :P } &$?i } XU}sbbwu ]GS@ ub .2jG~_W[ //启动子线程 pSq3\#Twr fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )n[ oP% for(int i=0;i<nStartPos.length;i++) GAlAFsB { bh8IF,@a fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 32flOi: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Odo"S;) nStartPos,nEndPos,i); -;?5<>zZ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w]{NaNIeq1 fileSplitterFetch.start(); B0:[3@P7 } gr/o!NC
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
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OG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); S>]Jc$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", cXJtNW@ nEndPos = " + nFileLength); "DFj4XKXY9 // fileSplitterFetch[nPos.length-1].start(); &!3=eVg 3d{v5. C#X Y.Er!(pz //等待子线程结束 jnK8
[och //int count = 0; kd9GHN;7 //是否结束while循环 !S/hH% C boolean breakWhile = false; RPvOup !@_( W !8|] R while(!bStop) up~l4]b+ { vYD>m~Qc^ write_nPos(); {9<2{$Og Utility.sleep(500); l.i"Z pik breakWhile = true; )y7SkH| pPm9v_G #_+T@|r for(int i=0;i<nStartPos.length;i++) sq_N!
{ eXa a'bTx if(!fileSplitterFetch.bDownOver) 3mIX9&/ { sg(L`P breakWhile = false; H7e/6t<x break; #zcp!WE.OI } <%JRZYZ } ]]s_ 8u3 if(breakWhile) sX3Vr&r break; xw5E!]~D F6T@YSP bp6 La`+ //count++; $a6&OH/ //if(count>4) vpY|S2w)Bp // siteStop(); *|x2"?d-F: } -#b-@sD -;z&"> Q^v8n1 System.err.println("文件下载结束!"); 7cn"@h rJ } ;<#fZ0(l; catch(Exception e){e.printStackTrace ();} hGH{Xp[mW } <?P UF, ^yKP 99( j=)%~@ //获得文件长度 PZ-|W public long getFileSize() i4.s_@2Y { S\Qh#yFT int nFileLength = -1; #](k,% 2 try{ 4];Qpln URL url = new URL(siteInfoBean.getSSiteURL()); }[PbA4l.g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y9m'RFZr httpConnection.setRequestProperty("User-Agent","NetFox"); {=7W;uL HLAYmXX"w V9"Kro int responseCode=httpConnection.getResponseCode(); joifIp_ if(responseCode>=400) =MG { )\uy 0+b processErrorCode(responseCode); 5cP] return -2; //-2 represent access is error p;) ;Vm+8 } _f,q8ZkSr >ofS'mp :Qu!0tY String sHeader; <W vuW6 MUNeGqv {!B0&x for(int i=1;;i++) TUZ-4{kV" { -(>x@];r0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ##,i< //Utility.log(in.readLine()); 4aAr|!8|h! sHeader=httpConnection.getHeaderFieldKey(i); 0i$jtCCL( if(sHeader!=null) kT UQ8U { #JZf]rtp if(sHeader.equals("Content-Length")) C^r 3r6 { +U^dllL7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ap\2={u^| break; 2?ZHWS>U } lw? f2_fi } w"-bO ~5h else /w!b2KwV break;
nP?(9;3* } p7 !q#o } P-No;/!B# catch(IOException e){e.printStackTrace ();} -z0,IYG } catch(Exception e){e.printStackTrace ();} [j}%&$ ~SZ0Yu:X n <lU; Utility.log(nFileLength); Q=gVxS 8ne'x!1 D _Ux>BJmP return nFileLength; e\.|d<N? } R]/F{Xs ^k^%w/fo b_Ba0h= //保存下载信息(文件指针位置) I]Wb\&$ private void write_nPos() )TyL3Z\>( { D2>EG~xWq try{ %dL|i2+*8 output = new DataOutputStream(new FileOutputStream(tmpFile)); "=|yM~V output.writeInt(nStartPos.length); Ff& VBm for(int i=0;i<nStartPos.length;i++) LjXtOF { *kL1r
w6 // output.writeLong(nPos); -.g5|B output.writeLong(fileSplitterFetch.nStartPos); d2.eDEOsC output.writeLong(fileSplitterFetch.nEndPos); f]5bAs } ET_}x7 output.close(); >g93Bj* } )J (ekfM catch(IOException e){e.printStackTrace ();} >6ch[W5k@ catch(Exception e){e.printStackTrace ();} $F G4wA } &.<{c
`- :!tQqy2 HK&F'\'} //读取保存的下载信息(文件指针位置) =q[3/'2V$? private void read_nPos() zK:/
1 { K
N0S$nW+ try{ ;=)CjC8) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xvp{F9~qT int nCount = input.readInt(); # JuO nStartPos = new long[nCount]; 'L3 \ I nEndPos = new long[nCount]; ]pb;q(?^ for(int i=0;i<nStartPos.length;i++) [rPW@|^5 { TmX~vZ nStartPos = input.readLong(); ,[Cl 'B nEndPos = input.readLong(); o?p) V^7 } }tv- input.close(); gMI%z2]'- } B7}-g"p$/ catch(IOException e){e.printStackTrace ();} ,{8~TVO catch(Exception e){e.printStackTrace ();} 9KXp0Q?-$ } w=#&(xm0 P$]Vb'Fz g-}Vu1w0{6 private void processErrorCode(int nErrorCode) ,fET.s^|U { ,Z>Rv Ll System.err.println("Error Code : " + nErrorCode); (eO0Ic[c } A2rr> j*QY_Ny* J4lE7aFDA~ //停止文件下载 W11_MTIU public void siteStop() *A,=Y/ { [(btpWxb^ bStop = true; kmov(V for(int i=0;i<nStartPos.length;i++) G0]q(.sOy fileSplitterFetch.splitterStop(); 8%
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N5t96X KM0#M'dXy } HNU[W8mg8 } c}v:X
Slh7 //负责部分文件的抓取 hH[JY(V **FileSplitterFetch.java LDPo}ogs */ Nob(bD5SpE package NetFox; ?m?e2{]u, _FdWV? }clFaT>m? import java.io.*; 8zVXQ!' import java.net.*; &]vd7Q.t u3k+Xg: XkdNWR0 public class FileSplitterFetch extends Thread { T5-4Q G|^gaj '9 L9r 3jz String sURL; //File URL 7ky(g' long nStartPos; //File Snippet Start Position 2s6Vy long nEndPos; //File Snippet End Position S~6<'N&[ int nThreadID; //Thread's ID HHEFX9u boolean bDownOver = false; //Downing is over Iv/yIS boolean bStop = false; //Stop identical `+zr PpX FileAccessI fileAccessI = null; //File Access interface kN]#;R6 P'Y8
t @KS:d\l}U public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;WGY)=-gv { `Rm B{qgB this.sURL = sURL; l0Pg`wH, this.nStartPos = nStart; u:,B"! this.nEndPos = nEnd; 0|GxOzNd nThreadID = id; :K8T\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,Y!T!o}1
} ~s5Sk#.z5 DK)qBxc8 %eT/:I public void run() x!YfZ* { IRS^F;) while(nStartPos < nEndPos && !bStop) 1km=9[;w' { #d|.BxH d[$1:V :'!?dszS try{ `L;I/Hp URL url = new URL(sURL); C)ChF`Ru': HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eq4<
httpConnection.setRequestProperty("User-Agent","NetFox"); t"BpaA^gO String sProperty = "bytes="+nStartPos+"-"; 6Jj)[ R\5= httpConnection.setRequestProperty("RANGE",sProperty); +ZZiZ&y Utility.log(sProperty); 2G'G45Q ;G\rhk BO[A1'> InputStream input = httpConnection.getInputStream(); <XLATS8Y //logResponseHead(httpConnection); GzR;`,_O/ 3}T&|@* F%Mlid;1 byte[] b = new byte[1024]; Bo~wD|E2 int nRead; RyM2CQg[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) qK#* UR0% { hnY^Z_v! nStartPos += fileAccessI.write(b,0,nRead); qBwqxxTc //if(nThreadID == 1) YInW)My.h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `/|=eQ")o@ } X G^
S%T1na^x rB7(&(n>^ Utility.log("Thread " + nThreadID + " is over!"); ipyO&v bDownOver = true; mC93
&0 //nPos = fileAccessI.write (b,0,nRead); $jntT(V } $qEJO=v catch(Exception e){e.printStackTrace ();} zf S<X } X:!%"K%} } #/1Bam6 fcBSs\\C~ P]x@h //打印回应的头信息 5_i&}c23Vn public void logResponseHead(HttpURLConnection con) }Jtaq[y\r { ; 6zu! for(int i=1;;i++) p1D-Q7F { $Z,+aLmb String header=con.getHeaderFieldKey(i); vLC&C-f if(header!=null) [+%*s3`c# //responseHeaders.put(header,httpConnection.getHeaderField(header)); dGfWRqS] Utility.log(header+" : "+con.getHeaderField(header)); Fb}9cpz{ else p75w^ break; t+#Ss v8 } @z,'IW74V } 8<G@s`* eQeNlCG :L?zk"0C public void splitterStop() ^:q(ksssY { [Q*kom : bStop = true; jBQQ?cA } XR&*g1 nOB
]?{X f9rToH } 4EELaP|% PNG'"7O T]myhNk /* W=b5{
6 **FileAccess.java IW46-;l7 *//文件访问(定位,写) BkJcT package NetFox; y^XwJX-f import java.io.*; :[rx|9M6 +X&B' l5MxJ>?4%B public class FileAccessI implements Serializable{ q@\D5F%
> v3/cNd3 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 t (1z+ RandomAccessFile oSavedFile; "pH+YqJ$ long nPos; a2i
JrQN-e! +j<Nu)0iY public FileAccessI() throws IOException 0s8S`hCn> { <E^:{J95 this("",0); J3'"-,Hv } Soa.thP GM%|mFqeu ucn aj| public FileAccessI(String sName,long nPos) throws IOException _A,m@BCz { o0/03O oSavedFile = new RandomAccessFile(sName,"rw"); 6>"0H/y, this.nPos = nPos; "&r1&StO oSavedFile.seek(nPos); OVd"'|&6_ } A6sBObw; Wb|IWnH$
V`%m~#Me public synchronized int write(byte[] b,int nStart,int nLen) ,4\vi| { [$./'-I] int n = -1; DB*IVg
try{ p5bH-km6 oSavedFile.write(b,nStart,nLen); _
x7Vyy5 n = nLen; hVlL"w*1 } J0>Q+Y catch(IOException e) mr/^lnO { `$i`i 'S e.printStackTrace (); A$oYw(m# } ['c:n? 8@r+)2 m xWaXb return n; jem$R/4" } u54+oh|,M B!Qdf8We MTF:mLJ } pa+y(!G RuHJk\T+ X-ml0
=M[ /* !q/?t XM! **SiteInfoBean.java YY.;J3C */ jeJGxfi i package NetFox; b'ew
Od= ?d_Cy\G ];< [Cln% public class SiteInfoBean { E]gKJVf9[ ypml22)kz O|OPdD private String sSiteURL; //Site's URL 8RocObY_W private String sFilePath; //Saved File's Path 7{b|+0W private String sFileName; //Saved File's Name *|4~
0w private int nSplitter; //Count of Splited Downloading File R{*p\; ly{~X 5[ @4($q8 public SiteInfoBean() mMa7Eyaf {//nSplitter的缺省值为5 Mk^o*L{H //default value of nSplitter is 5 'Oq}BVR& this("","","",5); l,d8%\ } k1%Ek#5 bhg"<I K&S~IFy public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7#<|``]zNf { MLp5Y\8* sSiteURL= sURL; |_ ;-~bmb sFilePath = sPath; PPmZ[N9(; sFileName = sName; $y`|zK|G- this.nSplitter = nSpiltter; {UwJg +]AE}UXZoh V#Wd } qg'm<[ :1AOund >u6kT\|^C public String getSSiteURL() cOS|B1xG { !IT']kA return sSiteURL; D'</eJ } )~WxNn3rx ]5}
=r 8^HMK$ public void setSSiteURL(String value) @jjp\ ~ { } #$Y^ +UN sSiteURL = value; RJGf@am& } 4}l,|7_&I 3J@#V ' :yw0-]/DD public String getSFilePath() (?~F}u
v { eyy&JjVs return sFilePath; C
YnBZ } gBresHrlH lZb1kq%9g JSO>rpO public void setSFilePath(String value) hNP| { RMsr7M4<91 sFilePath = value; koaH31Q } ncu>
@K$n B<_T"n'#b PN<Y&/fB
public String getSFileName() U4Qc$&j> { )LnHm return sFileName; Dx iCq(; } !dmI}<@&k cITQ,ah nfl6`)oW public void setSFileName(String value) I_N"mnn@Nr { Px)VDs=k sFileName = value; P3(u+UI3 } +dR$;!WB3 011 _(v /&dC? bY public int getNSplitter() a*=\-;HaZ { 3wa }p^ return nSplitter; zYF'XB]4 } 2D&tDX< 3\6jzD 5P+3D{ public void setNSplitter(int nCount) pH)V:BmJ { !*EHr09N7 nSplitter = nCount; 1G$kO90 } `N2zeFG } <gJ|Wee ~"{Kjr#R
aS:17+! /* ]vhh* **Utility.java BxlpI[yWq */ b\H~Ot[i package NetFox; o^_z+JFwb #jK{)%}mA BDc*N]m}B1 public class Utility { A*E$_N f`H}Y!W( O:#t>
; public Utility() PK!=3fK4\F { / ijj;9EB Nqewtn9n hDzKB))<w } Q!|. ,?V =as ]>?< //线程睡眠 qDNqd public static void sleep(int nSecond) ~ia#=|1} { W<v?D6dFq try{ Up)b;wR Thread.sleep(nSecond); WWHT;ST } \MX>= catch(Exception e) \S1WF?<, { Pgs4/ e.printStackTrace (); GS \- } js'*:*7 } z`m-Ca>6 6e/ 2X<O //日志 ;]+kC public static void log(String sMsg) ;sCX_`t0E { +
ECV|mkk System.err.println(sMsg); N{
;{<C9Z } 3-~_F*%ST -9vAY+s. :n{rVn}G public static void log(int sMsg) 5|wQeosXxI { enK4`+.7 System.err.println(sMsg); JKGUg3\~ } ,k+jx53XV } &I <R|a |&h!#Q{7l c;BQ$je} /* z35n3q **TestMethod.java @N1ta-D# */ Su-LZ'C\ package NetFox; wW]|ElYR= `p*7MZ9- >0T0K`o public class TestMethod { E&GUg/d ^ D?;K8a-l ;(TBg-LEK public TestMethod() -GH#nF3G { ///xx/weblogic60b2_win.exe qm@c[b try{ )u'oI_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); nU||Jg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _QkU,[E SiteFileFetch fileFetch = new SiteFileFetch(bean); x!]ZVl] fileFetch.start(); pJK puoiX } HOtays,#<} catch(Exception e){e.printStackTrace ();} =DGaK0n h:Npi
`y H /*^$>0Uo } bXC;6xZV ]%"Z[R ([`-*Hy public static void main(String[] args) C(7LwV { dD@T}^j *| new TestMethod(); 80c\O-{ } / QSK$ZDC } J:5%ff~r\ 点击下载更多相关资料
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