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/* xt40hZ$ **SiteFileFetch.java *S{%+1F */ RQ|!?\a= package NetFox; mJWl#3 import java.io.*; ZmYp!B_~ import java.net.*; 9h~>7VeZ) ,D~C40f \Fc"Q@.u public class SiteFileFetch extends Thread { VN;Sz,1Z kGX`y.-[ KVqQOh'_T SiteInfoBean siteInfoBean = null; //文件信息Bean tS`fG; long[] nStartPos; //开始位置 xB
4A"| long[] nEndPos; //结束位置 &.Yh_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 ywCE2N<-V? long nFileLength; //文件长度 %:((S]vAi boolean bFirst = true; //是否第一次取文件 qb
"H&)aHw boolean bStop = false; //停止标志 R+, tn,<< File tmpFile; //文件下载的临时信息 b~v DataOutputStream output; //输出到文件的输出流 Q{mls f'R^MX2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]y!|x_5c3 public SiteFileFetch(SiteInfoBean bean) throws IOException _X;5ORH" { W^al`lg+y siteInfoBean = bean; 1kTJMtZG~ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); e
0!a
&w tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); tQ] R@i if(tmpFile.exists ()) 0$* z { (~/D*<A bFirst = false; $NJi]g|<3 read_nPos(); k,b(MAiQ0 } O^oFH
OpFh else m.S@ e8kS { 7c<2oTN' nStartPos = new long[bean.getNSplitter()]; TvMY\e nEndPos = new long[bean.getNSplitter()]; }GQ8|fg`U } <[[DS%(M^ &~^"yo#b bg[q8IBCd vNi7=3 } b^^Cj( ~])\xC K3'`!K a* public void run() PX(Gx%s| { {"'W!WTb //获得文件长度 B 2&fvv? //分割文件 \asF~P //实例FileSplitterFetch ].2q.7Yur //启动FileSplitterFetch线程 Wi hOGdUS6 //等待子线程返回 U*v//@WbH try{ xdp{y=,[ if(bFirst) w.J2pvyB { c?b?x
6 2 nFileLength = getFileSize(); 3(6i6 vV if(nFileLength == -1) [0F+t,` { "YHe]R>3s System.err.println("File Length is not known!"); 7P:0XML} } Yq<D(F#qx else if(nFileLength == -2) :]e:-JbT4z { OFCkQEG=y> System.err.println("File is not access!"); ,GZ(>| } yq\)8Fe else %=\h=\wt { hSr#/d w& for(int i=0;i<nStartPos.length;i++) p;BdzV> { f{WJM>$: nStartPos = (long)(i*(nFileLength/nStartPos.length)); <}N0y*m } '-gk))u>) for(int i=0;i<nEndPos.length-1;i++) :3{@LOil^ { Xp._B4g nEndPos = nStartPos[i+1]; $fuFx8`2W } uoaF(F- nEndPos[nEndPos.length-1] = nFileLength; %|oY8;0|A> } )^g}'V=vIr } O)&xT2'J Yy>%dL \f0I:%- //启动子线程 tCtR(mG=A fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %NX for(int i=0;i<nStartPos.length;i++) `=b*g24z[N { NZ9`8&93 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Wky~ hm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ANp4yy+ nStartPos,nEndPos,i); W[j =!o Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9j$
OU@N
8 fileSplitterFetch.start(); H>;km$b + } u =#LY$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
(= uwx# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?GB($D=Y'& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]n\WCU]0 nEndPos = " + nFileLength); Fov/?:f$ // fileSplitterFetch[nPos.length-1].start(); t*e+[
+5?sYp\ u#la+/
//等待子线程结束 9%kY8#%SV //int count = 0; -!(3fO: //是否结束while循环 U|-4*l9Ed boolean breakWhile = false; {eqUEdC #B)/d?aa' f1hi\p0q while(!bStop) VH,k EbJ { DU]MMR write_nPos(); B2WPjhzD Utility.sleep(500); zZki9P
breakWhile = true; *G>V`||RW Qf7]t-Kp <74q]C for(int i=0;i<nStartPos.length;i++) burEo.= { q,$UKg#i if(!fileSplitterFetch.bDownOver) REnRpp$ { 7b:oz3 ?PI breakWhile = false; |C7GI[P break; X\X } \qV5mD]"M } >xJt&jW- if(breakWhile) {B?%r[nW break; H :d{Sru `
n@[=l~ ' OdZ[AN //count++; Q*( ]&qr"E //if(count>4) $
7O[|:Yv // siteStop(); !*?&V3! } ^X[Kr=:Jp 3=T<c?[ N$p}rh#7{ System.err.println("文件下载结束!"); i*W8_C:S } #}:VZ2Z catch(Exception e){e.printStackTrace ();} "g>uNtt~ } ( F0.lDZ J U}XSb kh^AH6{2 //获得文件长度 qSkt
}F%' public long getFileSize() xm/v:hl= { }@SZ!-t%rD int nFileLength = -1; ~k|~Q\ try{ dH#S69> URL url = new URL(siteInfoBean.getSSiteURL()); =qCVy:RL4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (U/ 6~r'.L httpConnection.setRequestProperty("User-Agent","NetFox"); ;9=9D{-4+ )&se/x+ c^A3|tCi int responseCode=httpConnection.getResponseCode(); uC 5mxZ if(responseCode>=400) s-k~_C>Fw { 6jPaS!E processErrorCode(responseCode); (gl CTF9v return -2; //-2 represent access is error C.%iQx`
} W(~G^Xu im*QaO%a4 L.l"'=M String sHeader; E
I)Pfx"0 2=(=Wjk. [q9TTJ@2 for(int i=1;;i++) A6q,"BS^d { f.V0uBDN //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); qaG%PH}a //Utility.log(in.readLine()); P,_GTs3/G sHeader=httpConnection.getHeaderFieldKey(i); *)L%pH>` if(sHeader!=null) D@>P%k$$s> { j%]i#iqF if(sHeader.equals("Content-Length")) s:jr/ j! { !i.`m-J* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 7bQ#M )} break; #9#N+ } PrDvRWM } ZKAIG=l&! else F!c%&Z break; x>&1;g2r } TnPd pynP } W{=>c/ catch(IOException e){e.printStackTrace ();} 5p
U(A6RtS catch(Exception e){e.printStackTrace ();} E88_15'3D &>i+2c~ {LR?#. Utility.log(nFileLength); rQj.W6w= 7I(Sa?D: ]1abz: return nFileLength; bveNd0hN } N%_-5Q)so H.O7Y 7 82NiVed //保存下载信息(文件指针位置) 7{."Y@ private void write_nPos() Z;7f
D { W*`2lf try{ P[#V{%f*5 output = new DataOutputStream(new FileOutputStream(tmpFile)); ]Ny. gu output.writeInt(nStartPos.length); x4.-7%VV% for(int i=0;i<nStartPos.length;i++) nDui9C { /_o1b_1U // output.writeLong(nPos); vRRi"bo output.writeLong(fileSplitterFetch.nStartPos); 8'Z9Z*^h#x output.writeLong(fileSplitterFetch.nEndPos); x8b w# } /bfsC&
3 output.close(); KB*[b } d[-w&[iy catch(IOException e){e.printStackTrace ();} 1wE~dpnx catch(Exception e){e.printStackTrace ();} @~QW~{y } uH65DI< fCO!M1 t Ks8S^77 //读取保存的下载信息(文件指针位置) JS!rZi private void read_nPos() 7!Ym~M= { o LuGW5wzj try{ *1Nz
VV DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @xSS`&b int nCount = input.readInt(); kTc'k nStartPos = new long[nCount]; n8iejdA' nEndPos = new long[nCount]; Kn=P~,FaG3 for(int i=0;i<nStartPos.length;i++) ;gK+AU { J--9VlC' nStartPos = input.readLong(); 224I%x., nEndPos = input.readLong(); {j ${i } t}_qtO7> input.close(); `)1_^# k } Z fL\3Mn catch(IOException e){e.printStackTrace ();} <CzH'!FJN catch(Exception e){e.printStackTrace ();} RfEmkb<9Z } Tx`;y| "eZNci z)]_ (zZ^ private void processErrorCode(int nErrorCode) Tj<W4+p{ { }`h)+Im= System.err.println("Error Code : " + nErrorCode); ^3*/x%A,g } #f\U3p vZhN%
DfY 8iqx*8} //停止文件下载 M=`F $ public void siteStop()
/DQoM@X { 9_KUUA bStop = true; 1;]cYIq for(int i=0;i<nStartPos.length;i++) >9uDY+70I3 fileSplitterFetch.splitterStop(); hi`\3B R l^ENrv!] 3oE *86 } zRL[.O9 } ! Hdg
$, //负责部分文件的抓取 H2E!A2\m **FileSplitterFetch.java \_De(
p */ #wk'&XsC#z package NetFox; Z+(V'e; zw7=:<z= J0C,KU( import java.io.*; 8`U5/!6fu import java.net.*; `GqS.O}C t?QR27cs$ ,Hch->?Og public class FileSplitterFetch extends Thread { u6awcn |Y0BnyGK kbM 4v G String sURL; //File URL e~i
?E long nStartPos; //File Snippet Start Position g5;
W6QX long nEndPos; //File Snippet End Position Ex&f}/F int nThreadID; //Thread's ID FC.y%P, boolean bDownOver = false; //Downing is over l`[*b_
Xt boolean bStop = false; //Stop identical B&O931E7 FileAccessI fileAccessI = null; //File Access interface UStZ3A' Yvs9)g hz>&E,<8q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException eH(8T { C-@@`EP this.sURL = sURL; .NiPaUzc< this.nStartPos = nStart; UpN:F
this.nEndPos = nEnd; (`<l" @:_* nThreadID = id; )o
SFHf fileAccessI = new FileAccessI(sName,nStartPos);//定位 Me`jh8(K\6 } &t5pJ`$(Cy O<)"kj 7 YaFQy0t%/5 public void run() s@jzu { Fwm{oypg% while(nStartPos < nEndPos && !bStop) [8^jwnAYS { Y9'Bdm/ H9xxId?3u *h-_
try{ L/"u,~[ URL url = new URL(sURL); 8N'`kd~6[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DSM,dO' httpConnection.setRequestProperty("User-Agent","NetFox"); kK16+`\+ String sProperty = "bytes="+nStartPos+"-"; cr27q6_ httpConnection.setRequestProperty("RANGE",sProperty); vMRM/. Utility.log(sProperty); ALiA+k N "F7g8vu (9*=d_= InputStream input = httpConnection.getInputStream(); AVZ -g/<
//logResponseHead(httpConnection); _`+
!,kG[ g%4-QCZ, ;k9s@e#a byte[] b = new byte[1024]; ]RML;]^ int nRead; _o8il3 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) G!ty@
Fx { ",B92[}Ar nStartPos += fileAccessI.write(b,0,nRead); xzyV|( //if(nThreadID == 1) 5dXC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EZ8Ih,j9 } c}U&!R2p{ Y 'Yoc Ki,]*-XO Utility.log("Thread " + nThreadID + " is over!"); Aq^1(-g bDownOver = true; DQ?'f@I&* //nPos = fileAccessI.write (b,0,nRead); QNLkj`PL/ } vh"zYl` catch(Exception e){e.printStackTrace ();} >Yl?i&3n } b*n o.eB } gLaFIeF<+ l-Xxur5M' `jSxq66L p //打印回应的头信息 `9(TqcE public void logResponseHead(HttpURLConnection con) +w?RW^:Q= { 9F(<n for(int i=1;;i++) VuN=
JX { <*i
' String header=con.getHeaderFieldKey(i); 1ZJP.T` if(header!=null) exiCy1[+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ' &^:@V Utility.log(header+" : "+con.getHeaderField(header)); od"Oq?~/t else /VgA}[%y break; Sy6Y3 ~7 } l`:M/z6" } razVO]]E ?dl7!I@<E< iN %kF'&9 public void splitterStop() ~gNa<tg"1 { )V*Z|,#no bStop = true; ULIbVy7Y } frWw-<HoI 4N[8LC;MH q~^Jd=cB\ } s(w6Ldi vj]-p= 1mz;4xb /* VC:.ya|Z **FileAccess.java u7=`u/ *//文件访问(定位,写) QeuIAs* _ package NetFox; ArDkJ`DE import java.io.*; x=pq-&9>B p~Fc*g[! _Jn-# du public class FileAccessI implements Serializable{ >V2Tr$m j +/'3=!oyd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UiqHUrx RandomAccessFile oSavedFile; oyZ}JTl(Q long nPos; <5?.s<
y$" FX`SaY>D h|$.`$ public FileAccessI() throws IOException Kr3L~4> { YDE;mIW this("",0); M.O3QKU4 } l ~kxt2& (, Il>cR4 .uG|Vq1v public FileAccessI(String sName,long nPos) throws IOException 494"-F 6 { d[;S n:B oSavedFile = new RandomAccessFile(sName,"rw"); w[~O@:`]<o this.nPos = nPos; J+r\EN^9 oSavedFile.seek(nPos); 3qR%Mf' } ;HtHN
K(o jc)[5i0 DF|(CQs9 public synchronized int write(byte[] b,int nStart,int nLen) -.~Dhk { x9)^0Hbo int n = -1; $-H#M]Gq try{ P!q!+g oSavedFile.write(b,nStart,nLen); |j($2. n = nLen; }SIUsh' } h W\q catch(IOException e) @iWql*K;m { 8Ux3,X= e.printStackTrace (); 'B ocMjRA } *Hx{ eqC fA{[H:*}G qN%i$mJTo return n; A0Pg|M } tu8n1W &i179Qg! xs y5" } FvQ>Y')R7Z #!(OTe L 6}zargu(; /* c193Or'6Y **SiteInfoBean.java MO|aN, */ [}Vne;V package NetFox; `./$hh W9nmTz\8 2x%Xx3! public class SiteInfoBean { b2]1Dfw g/e\EkT 2MaHD}1Jw private String sSiteURL; //Site's URL f}Mx\dc private String sFilePath; //Saved File's Path ?*lpu private String sFileName; //Saved File's Name @(Q'J` private int nSplitter; //Count of Splited Downloading File ;K]6/Wt rvrv[^a( !? !~8J~ public SiteInfoBean() w64 /$ {//nSplitter的缺省值为5 YTP6m9hA+ //default value of nSplitter is 5 &o@IMbJ8 this("","","",5); :%-xiv } *\ZK(/V xV@/z5Tq 3.,O7 k7y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) S?TyC";! { (|H1zO sSiteURL= sURL; Qz6Ry\u sFilePath = sPath; Ni"n_Yun sFileName = sName; Dg(882#_ this.nSplitter = nSpiltter; =w&JDj J;"66ue(d aF2vw{wT} } T v2d?y Z<+Ipj& 0RmQfD> public String getSSiteURL() O%feB e { LA?h +) return sSiteURL; sswYwU } Bs7/<$9K/ mT enzIp >HMuh) public void setSSiteURL(String value) zE$KU$ { VE3,k'^v sSiteURL = value; R)4L]ZF } B^Z %38o V}de|= 5>{ public String getSFilePath() &)Y26*(` { rZ}y'A return sFilePath; rm}OVL } Wc]L43u lxsBXX Zg mFoE2?Y public void setSFilePath(String value) =^ { c~j")o sFilePath = value; !\D[lh}rL } <i}lP/U 8bl&-F` Y [8~M8QX public String getSFileName() .C$4jR.KC { <*O~?=6p return sFileName; QAs$fi}f]s } wCT. (d_ G+Gd;`4 -n.ltgW@ public void setSFileName(String value) u!wR { 9a4Xf%!F>z sFileName = value; w'uI~t4 } =/_tQR~ #|\w\MJamP Qe8F(k~k public int getNSplitter() )8ub1,C { x""gZzJ$L return nSplitter; )qxZHV } i n}N[ ``
!BE"yN aB@D-Y"HO public void setNSplitter(int nCount) #9=as Y { Z.:g8Xl-6 nSplitter = nCount; mRJX, } RE*;_DF } |"7F`M96I OB-gH3: *>b*I4dz /* j2\B(PA **Utility.java urM=l5Sx */ 1D@'uApi. package NetFox; fcDiYJC* j A/xe TCb 7-s public class Utility { _wvSLu <q w0`aW6t# _T[7N|'O public Utility() a g=,oYn { G.ag$KF 0[ (Z48 1^F
!X= } LI`L!6^l x}acxu 2H7 //线程睡眠 }ZPO^4H;- public static void sleep(int nSecond) HfQZRDH { /HlLfW try{ T~=r*4 Thread.sleep(nSecond); ?_hKhn%K9
} )83UF
r4kP catch(Exception e) <m") 2dJ { ?\_\pa/+ e.printStackTrace (); }cl~Vo-mp } eN]AJ%Ig } 8 K7.; t1 km%c0: //日志 '*`25BiQ public static void log(String sMsg) w]<a$C8*y: {
OHEl.p]| System.err.println(sMsg); pi/Jto25z } 960[.99 ar+ j`QIe 8xAxn+; public static void log(int sMsg) |:yWDZg[ { ;"d>lyL System.err.println(sMsg); O7]p `Xi8 } |@Cx%aEKU } zk#NM"C+ ~ 9F
rlj |$hBYw /* k/U1
: 9 **TestMethod.java WAd5,RZ? */ Ib8*rL0p<L package NetFox; {=Z xF gL)l)}# MM+x}g.? public class TestMethod { 8mrB_B5 ]g/:l S4 ef
!@|2 public TestMethod() {>x6SVF { ///xx/weblogic60b2_win.exe he/WqCZg try{ !xqy6%p SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); NVt612/'7y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >#9f{ SiteFileFetch fileFetch = new SiteFileFetch(bean); 8[PD`*w fileFetch.start(); Z%rMX} } -^R6U~ catch(Exception e){e.printStackTrace ();} C'Gj\ [UP-BX( ]RBT9@-:U } -k4w$0) R]LRgfi9 ][gr(-6 8 public static void main(String[] args) ,b b/
$
{ N9SC\ new TestMethod(); -[h2fqu1 } HITw{RPrW } QsXy(w#F 点击下载更多相关资料
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