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/* K1;b4Sl?A **SiteFileFetch.java 1Z(9<M1!M */ I~ mu'T package NetFox; "N,@J-]/k import java.io.*; jQfnc:' import java.net.*; (A?w|/bZd 9*!*n ~
,HNk<W public class SiteFileFetch extends Thread { "-IF_Hid i\4YT r, AOqL&z SiteInfoBean siteInfoBean = null; //文件信息Bean a=B $L6*4 long[] nStartPos; //开始位置 h]Gvt 5 long[] nEndPos; //结束位置 xj]^<oi< FileSplitterFetch[] fileSplitterFetch; //子线程对象 $(yi+v long nFileLength; //文件长度 ?ZhBS3L boolean bFirst = true; //是否第一次取文件 ;<F^&/a|yQ boolean bStop = false; //停止标志 Z#kB+.U File tmpFile; //文件下载的临时信息 }1a(*s,s-^ DataOutputStream output; //输出到文件的输出流 F+D
e"^As mZnsr@KF //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %r(qQM.Pl public SiteFileFetch(SiteInfoBean bean) throws IOException h>z5m { cwHbm% siteInfoBean = bean;
z'5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); f$?`50D"1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @RdNAP_6 if(tmpFile.exists ()) 3@0!]z^W { yZmeke)_ bFirst = false; je>mAQKi\ read_nPos(); szOa yAS } 9'vf2) " else '+GYw$ { <c,iu{: nStartPos = new long[bean.getNSplitter()]; ?. L]QU nEndPos = new long[bean.getNSplitter()]; W yP] ]I. } $/E{3aT@F2 g/i.b& {s2eOL5I|% D~2n8h"2ye } T.WN9=N !G'wC0 9S5C{~P4 public void run() M2qor.d { ftV~!r //获得文件长度 k/Q8:qA //分割文件 +}f}!h; //实例FileSplitterFetch ^*,?x //启动FileSplitterFetch线程 Ozsvsa //等待子线程返回 \`*]}48Z try{ ^>y|{;` if(bFirst) y
XCZs { ABq#I'H#@2 nFileLength = getFileSize(); s}4k^NGFJ if(nFileLength == -1) e"Tr0k { dZCjg0cx System.err.println("File Length is not known!"); 8(!?y[ } z;&J9r$` else if(nFileLength == -2) rFW,x_*_vP { l%
{<+N System.err.println("File is not access!"); y@ c[S; } zRm@ |IT else * YLpC^& { VF~kjH2> for(int i=0;i<nStartPos.length;i++) H_u%e*W { NU3s^ 8\( nStartPos = (long)(i*(nFileLength/nStartPos.length)); '*K%\] } w!Ii for(int i=0;i<nEndPos.length-1;i++) oe=W}y_k { G~f|Sx nEndPos = nStartPos[i+1]; VE^IA\J x } 6MQyr2c nEndPos[nEndPos.length-1] = nFileLength; t2FA|UF } 2=n,{rkmj% } K6nNrd}p: =BeJ.8$@VC Fw%S%*B8g //启动子线程 'D^@e0.3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0BP=SCi for(int i=0;i<nStartPos.length;i++) N1dM,H { [4mIww% fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '.XR,\g> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), A/~^4DR nStartPos,nEndPos,i); "iuNYM5P Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z+j3j2 fileSplitterFetch.start(); ^B(:Hv}G(: } zoau5t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =qww|B92 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 88zK)k{ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", r@G34QC+ nEndPos = " + nFileLength); %p^`,b} // fileSplitterFetch[nPos.length-1].start(); H `_{n< gV-A+;u xsx0ZovhY //等待子线程结束 h?vt6t9 //int count = 0; E~`<n]{G-C //是否结束while循环 #mRT>]di`D boolean breakWhile = false; ]fU0;jzX Yo,n#<37 .QDeS|l while(!bStop) awOH50R { f}Uf*Bp write_nPos(); dK7BjZTJo Utility.sleep(500); nOU.=N
v` breakWhile = true; 1*OZu.NdK ;sY n=r W9jxw4) for(int i=0;i<nStartPos.length;i++) et@<MU@` { e^-CxHwA- if(!fileSplitterFetch.bDownOver) LbnW(wr6:( { p9~$}!ua breakWhile = false; BB? 4>#D break; ] U.*KkQ } *NoixV1> } P u,JR if(breakWhile) b4>1UZGW- break; qyR}|<F8* d{(NeT s t:tIzFNv //count++; 2:;; //if(count>4) fD2)/5j1 // siteStop(); T0%l$#6v } tIo
b |) CfO 4 kB_T9$0e# System.err.println("文件下载结束!"); Dn+hI_"#_ } :[ll$5E. catch(Exception e){e.printStackTrace ();} 1F{,Zr } =8Gpov1!V~ >4nQ&b.u B<&g //获得文件长度 nc.:Wm6Mj public long getFileSize() p4z
thdN[ { 75H;6(7 int nFileLength = -1; SX[ try{ Xt$Y&Ho URL url = new URL(siteInfoBean.getSSiteURL()); @$5=4HA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +RyV"&v httpConnection.setRequestProperty("User-Agent","NetFox"); !PJp() 8T3Nz8Q7 'oF ('uR int responseCode=httpConnection.getResponseCode(); j-7aJj% if(responseCode>=400) h.5KzC
S { W@Rb"5Gy+ processErrorCode(responseCode); pSodTG$E return -2; //-2 represent access is error \qtdbi|Y } tiF-lq Sn[/'V^$a aA'of>'ib| String sHeader; T
(?
CDc+ Pdk#"H-j KxQMPtHstz for(int i=1;;i++) &A~hM[- { c uHF^l //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Mt&n|']`8 //Utility.log(in.readLine()); <yw56{w, sHeader=httpConnection.getHeaderFieldKey(i); j5rMY=|F if(sHeader!=null) aq- | { 5jHr?C if(sHeader.equals("Content-Length")) |cL,$G { j eyGIY nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); I6PReVIb break; j8;Uny9 } xMFEeSzl>S } yacN=]SW5 else R]4
h)" break; #?'@?0<6 } D+{&zo } +-qa7 catch(IOException e){e.printStackTrace ();} |mT1\O2a catch(Exception e){e.printStackTrace ();} ym'!f|9AA PCnu?e3F |v_ttJ;+Y Utility.log(nFileLength); r`Dm;@JU vK$wc~ XHh*6Yt_ ( return nFileLength; x|)pZa } 5-UrHbpCZ# '3xK1Am `@{(ijg. //保存下载信息(文件指针位置) 9(lcQuE9 private void write_nPos() V,]Fh5f { 4<Kxo\\S try{ 0rxGb} b* output = new DataOutputStream(new FileOutputStream(tmpFile)); Q+s2S>U{v output.writeInt(nStartPos.length); u-*z#e_L0 for(int i=0;i<nStartPos.length;i++) ^0?ww&X { HQMug // output.writeLong(nPos); dtig_s,)D output.writeLong(fileSplitterFetch.nStartPos); 0S$TLbx output.writeLong(fileSplitterFetch.nEndPos); hx ^ l } wV\G$|Y output.close(); #44}Snz } j{6O:d6([$ catch(IOException e){e.printStackTrace ();} $GYy[8{:V catch(Exception e){e.printStackTrace ();} &a)d,4e<M } 8Yo;oHk7 S3&n?\CO: @U9`V&])F[ //读取保存的下载信息(文件指针位置) )nrYxxN private void read_nPos() Y7;=\/SV { 35 L\ try{ I=
a?z< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); JF=T_SH^U int nCount = input.readInt(); N?O^" nStartPos = new long[nCount]; 4gZ)9ya nEndPos = new long[nCount]; \i\>$'f*z for(int i=0;i<nStartPos.length;i++) ;te( {u+ { 4/OmgBo' nStartPos = input.readLong(); NMUF)ksjN nEndPos = input.readLong(); M*D@zb0ia } @FF80U4' input.close(); r_kaS
als } Q\N >W+d catch(IOException e){e.printStackTrace ();} ]dgi]R|` catch(Exception e){e.printStackTrace ();} E<7$!P=z` } Yv0y8Vz@ !Y&]Y
G Ao#bREm private void processErrorCode(int nErrorCode) 2*a9mi { HE>V\+
AL System.err.println("Error Code : " + nErrorCode); NE4]i } tH#t8Tq5x ta^$&$l uc}F|O //停止文件下载 9$D}j" public void siteStop() <p-@XzyE { y=Z[_L!xr bStop = true; Q<KF<K'0hg for(int i=0;i<nStartPos.length;i++) mq(-L fileSplitterFetch.splitterStop(); gtT&97tT< mA"[x_ uGHM ]"!) } {?"X\5n0 } Z?V vFEt% //负责部分文件的抓取 +ej5C:El_} **FileSplitterFetch.java fxmY,{{ */ IZ87Px>zL package NetFox; a*iKpr- : {fjBa,o
# \v$zU import java.io.*; ,_s.amL3O{ import java.net.*; sB$" mJ ^bfU>02Q6p %oWG"u public class FileSplitterFetch extends Thread { ,~DKU*A_~ ]7oo`KcQ| Jd',v String sURL; //File URL 5NhAb$q2Y long nStartPos; //File Snippet Start Position |o*qZ}6 long nEndPos; //File Snippet End Position ]&9=f#k% int nThreadID; //Thread's ID a .?AniB0 boolean bDownOver = false; //Downing is over AEDBr < boolean bStop = false; //Stop identical W\mgM2p FileAccessI fileAccessI = null; //File Access interface eW8{],B :Nwv&+ .mcohfR public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException +$#XV@@~ { 7G*rxn"d this.sURL = sURL; WFhppi this.nStartPos = nStart; hwQ|'^(@O this.nEndPos = nEnd; ,4 q^( nThreadID = id; />pAZa fileAccessI = new FileAccessI(sName,nStartPos);//定位 {v|ib112; } 2v;&`04V< m,J
IId%O e@S$[,8 public void run() <#199`R { +$xw0)| while(nStartPos < nEndPos && !bStop) ;uv$>Fauk { N}<!k#d
E Xwjm T ld):Am}/o try{ uEG4^ URL url = new URL(sURL); Om>?"=yD E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '.8eLN httpConnection.setRequestProperty("User-Agent","NetFox"); m-+>h:1b|9 String sProperty = "bytes="+nStartPos+"-"; a/H5Y,b> httpConnection.setRequestProperty("RANGE",sProperty); M?Q\
Hw Utility.log(sProperty); x]?V*Jz !0UfX{. 8 nqF i InputStream input = httpConnection.getInputStream(); "u&7Y:)^wr //logResponseHead(httpConnection); /u`Opv&I mG@[~w+ Y C<FKWc byte[] b = new byte[1024]; `ZO5-E int nRead; 2PUB@B'
+ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2
e#"JZ= { Z#[%JUYp' nStartPos += fileAccessI.write(b,0,nRead); i_+e&Bjd4j //if(nThreadID == 1) `[XH=-p // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ov4 [gHy& } 0(9gTxdB Raetz>rL S4_ZG>\VT Utility.log("Thread " + nThreadID + " is over!"); wV{j CQ bDownOver = true; nD)SR //nPos = fileAccessI.write (b,0,nRead); WE_'u+!B } 8wZ
$Hq catch(Exception e){e.printStackTrace ();} B#.xs>{N } YcR: _ac } ~k?t _ Qek|> N1'Yo:_A //打印回应的头信息 \IzZJGi public void logResponseHead(HttpURLConnection con) l&"bm C:xr { a9_2b}t for(int i=1;;i++) NNTrH\SU# { PJe\PGh String header=con.getHeaderFieldKey(i); QJ>=a./ if(header!=null) &hi][Pt //responseHeaders.put(header,httpConnection.getHeaderField(header)); HM"(cB(n` Utility.log(header+" : "+con.getHeaderField(header)); i=M[$ else ?duw0SZ break; Vhb~kI!x } @y0kX<M } gu'+kw T2mZkK?rA 4"{g{8 public void splitterStop() (5[#?_~ { YY'[PXP$Y bStop = true; S_VzmCi } 6O 2sa-{d !}1l8Y ?6I`$ &OA } Aqg$q* Y ilQ\+xR{b ,p\*cHB9 /* 7Bf4ojKt **FileAccess.java cRf;7G *//文件访问(定位,写) ZC^?ng package NetFox; y4!fu<[i import java.io.*; dPgA~~ x0TE+rf5 .Dr7YquW public class FileAccessI implements Serializable{ Tm~jYgJ l|9'l[}& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 R9+f^o`W RandomAccessFile oSavedFile; }ASBP:c"t long nPos; W$Aypy
'XSHl?+q *\Hut'7 d public FileAccessI() throws IOException )*o) iN 7l { x}reeqn this("",0); L;KLmxy# } Ww{-(Ktx x_H"<-By lw4#C`bx public FileAccessI(String sName,long nPos) throws IOException lPl JL`e { 2b:I. oSavedFile = new RandomAccessFile(sName,"rw"); )IE)a[wo this.nPos = nPos; Io_7 oSavedFile.seek(nPos); m :]F&s } D[Ld=e8t YeF'r.Y gti=GmL(L public synchronized int write(byte[] b,int nStart,int nLen) 3v<9 Z9O { "xD5>(|^+Q int n = -1; u)ZZ/| try{ "n<u(m8E oSavedFile.write(b,nStart,nLen); c;R.rV< n = nLen; B#4 J![BX } [{_K[5i catch(IOException e)
q0\$wI { ;Y(~'KF e.printStackTrace (); +T7FG_ } HYg7B ] m^ECA$ lHPhZ(Z
return n; /3~}= b } /p@0Q[E ?T_hK #Cz:l|\ i } 8L(KdDY R~BW=Dz,e C6b(\#g( /* c1_?Z **SiteInfoBean.java PFeK;`[ */ rB5+~
K@ package NetFox; N" oJ3-~ 'MIM_m)H ]5J*UZ} public class SiteInfoBean { v#+tu,)V; 22m'+3I~Y v_@!u` private String sSiteURL; //Site's URL p&;,$KDA private String sFilePath; //Saved File's Path z3-AYQ.H private String sFileName; //Saved File's Name MT@Uu private int nSplitter; //Count of Splited Downloading File YyR~pT#ffT &Lgi \t@|-` public SiteInfoBean() V?cUQghHg {//nSplitter的缺省值为5
6@ )bZ| //default value of nSplitter is 5 rk(0w|zR+ this("","","",5); "'"dcA } ]qc2jut" LHP?!rO0 'GcZxF0 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5bKn6O)K { \<A@Nf" sSiteURL= sURL; !b+Kasss9 sFilePath = sPath; c^8y/wfok sFileName = sName; 1e^-_Bo6'o this.nSplitter = nSpiltter; o,RLaS,BK' 3^zOG2 th*E"@ } bx<7@ ?5 d3k% #VEHyz 6P public String getSSiteURL() "GofQ5,| { `p%&c%*A return sSiteURL; *l^%7Wrk } z7J2O f/qG:yTV` s0"1W"7vh public void setSSiteURL(String value) fhmqO0 { DP9hvu/85 sSiteURL = value; DFt1{qS8@u } lH ^[b[ L[*Xrp;/& 8+1tys public String getSFilePath() 'DQKpk' { 5!G}*u. return sFilePath; pemb2HQ'4j } LdAfY0 BS;_l"? a ^b_&}y public void setSFilePath(String value) jxr~cp?4 { amIG9:-1' sFilePath = value; :-
ydsR/ } ?t+Kp9@aZ MDS;qZx= >T4.mB7+> public String getSFileName() u%S&EuX { A|8(3PiP return sFileName; </|IgN$w` } W9T,1h5x T'l >$6 .3&zP public void setSFileName(String value) 0t1WvW { ,.uPlnB_ sFileName = value;
wEo/H } C-$S]6 Qd 1Q~PBla tm(.a?p public int getNSplitter() |jniI( { 8|`4D 'Ln return nSplitter; -1~bWRYq } m6)8L?B eqQA st#~ [MYd15 public void setNSplitter(int nCount) Zycu3%JI { VAF+\Cea= nSplitter = nCount; Y6/'gg'&5 } jx&pRjP
} U&|=dH]- ";cWK29\f jAmAT/ 1 /* ]n0kO& **Utility.java AS[cz!
> */ 6e$(-ai package NetFox; 2Tt@2h_L impzqQlZ, $6T*\(;T@A public class Utility { &+=A;Y) |<P]yn T%Vii*?M public Utility() u<./ddC { Iw8;",e2 1"009/| k`6T% [D] } [ XjJsk, P}y}IR{6 //线程睡眠 Z16G public static void sleep(int nSecond) _) 2fXG! { c$Js<[1 try{ J
(Yfup Thread.sleep(nSecond); EX7cjQsml } 0n|op:]BHM catch(Exception e) T+zZOI { MRiQaUg2 e.printStackTrace (); 7\'vSHIL } ?h"+q8& } bWo-(
qxq V6?ku6k //日志 f@Rn&&- public static void log(String sMsg) IL?3>$, { \zw0*;&U System.err.println(sMsg); *r$Yv&c, } aR ao\Wp| !
R?r)G5E _ro^<V$% public static void log(int sMsg) ;(fD R8 { UP}Ys* System.err.println(sMsg); lwaxj7 } aErms-~ } A9ia[2[ iXK.QktHw tbF>"?FY/ /* qP6]}Aj] **TestMethod.java *x2+sgSf_0 */ {$)zC*l package NetFox; t6BggO"_u j<>E
Fd *P_(hG&c public class TestMethod { O7%<( H%>
E6rVB at]=SA public TestMethod() l7]:b8 { ///xx/weblogic60b2_win.exe }&Un8Rg"h try{ eTemRNz SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9&fS<Hk //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j}3Avu% SiteFileFetch fileFetch = new SiteFileFetch(bean); #'fh'$5" fileFetch.start(); J^8(h R } Q;W[$yvW catch(Exception e){e.printStackTrace ();} b}< T< ma[%,u` QE*O~Yj } A(G%9'T =B<>H$ M3ihtY public static void main(String[] args) B/.+&AJw { 8+K=3=05#U new TestMethod(); S7]\tw_L) } B,@geJ } /|V!2dQs" 点击下载更多相关资料
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