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/* VVuR+=.& **SiteFileFetch.java _]|Qec) */ \.<KA package NetFox; >]&X ^V%Q# import java.io.*; | ^GyH$. import java.net.*; = .`jjDJ </s,pe79B }U[-44r: public class SiteFileFetch extends Thread { w`gyE
6A r,xmEj0E G{RTH_p SiteInfoBean siteInfoBean = null; //文件信息Bean Mw^*yW long[] nStartPos; //开始位置 M35Ax],:^ long[] nEndPos; //结束位置 BU6Jyuwn FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^$Krub{| long nFileLength; //文件长度 ssl&5AS boolean bFirst = true; //是否第一次取文件 ;%zC@a~{ boolean bStop = false; //停止标志 oT&m4I File tmpFile; //文件下载的临时信息 `Ko[r
R+
DataOutputStream output; //输出到文件的输出流 % fhNxR K]fpGo //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) SDBt @=Nl public SiteFileFetch(SiteInfoBean bean) throws IOException zn)yFnB!TH { `;F2n2@ siteInfoBean = bean; Fr5 Xp //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7=k^M, a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2z\;Q8g){r if(tmpFile.exists ()) p=gX!4,9< { S "
pI bFirst = false; kuKa8c read_nPos(); C_->u4- } MzTW8 else AK2WN#u@Z { n29(!10Px nStartPos = new long[bean.getNSplitter()]; ddDS=OfH nEndPos = new long[bean.getNSplitter()]; lTz6"/ } vV^dm)? Dp!zk}f| ]b}B2F'n &erm`Ho } DDw'' MFwO9"<A YBjdp=als public void run() tu}>:mk { KQmZ#W%2m //获得文件长度 N 8t=@~] //分割文件 _H\<[-l //实例FileSplitterFetch ebM{OI //启动FileSplitterFetch线程 ctJ&URCi# //等待子线程返回 dGkgaC+ try{ 97LpY_sU if(bFirst) C2/}d? bki { h6M;0_' nFileLength = getFileSize(); \Tm}mAvK/o if(nFileLength == -1) 36$[ { o""~jc~ System.err.println("File Length is not known!"); "2hh-L7ql } u\g,.C0 else if(nFileLength == -2) LE;g
0s { 6 hiC?2b{x System.err.println("File is not access!"); h$fe -G# } vVVPw?Ww- else j[e,?!8; { )2.)3w1_4 for(int i=0;i<nStartPos.length;i++) '^}+Fv<O { yV]xRaRr2 nStartPos = (long)(i*(nFileLength/nStartPos.length)); g.C5r]=+& } }5b M1h#z for(int i=0;i<nEndPos.length-1;i++) Jqfm@Y { u#jC#u^M nEndPos = nStartPos[i+1]; &u8z5pls8 } {#hVD4$b nEndPos[nEndPos.length-1] = nFileLength; E%3TP_B3 } wahZK~,EaY } rFu ez$ K=\&+at1 Ijedo/ //启动子线程 GdA.g
w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; j_Nm87i] for(int i=0;i<nStartPos.length;i++) n1J]p#nCa. { `X8@/wf# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fRHKQ(a# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tXq)nfGe{ nStartPos,nEndPos,i); ! OE*z $\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IXq(jhm8bL fileSplitterFetch.start(); l(:kfR~AC } 2\@Z5m3B // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y&f\VNlT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6|=j+rScv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "H+,E_&( nEndPos = " + nFileLength); _\zQ"y|G // fileSplitterFetch[nPos.length-1].start(); k-jahm4 oXgdLtsu IeTdN_8 //等待子线程结束 0k[2jh //int count = 0; @d&H]5 //是否结束while循环 yrr)
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boolean breakWhile = false; ?R'Y?b # cFr GyC)EFd while(!bStop) +5X DF { \l,rpVv5m write_nPos(); 5%i:4sMx
* Utility.sleep(500); <nzN $"%
breakWhile = true; Oh; Jw t;O1IMF I/uy>* for(int i=0;i<nStartPos.length;i++) 4Z5#F]OA7 { HEY4$Lf(I if(!fileSplitterFetch.bDownOver) @x{`\AM|% { j43$]'- breakWhile = false; q|dH~BK break; .<&s%{EW } reiU%C } -x]`DQUg if(breakWhile) yoS? s break; K*vU5S $8=@R' erFv(eaDK //count++; `f`TS#V //if(count>4) bcz-$?] // siteStop(); ]?<n#=eW } l] !B#{ pv# 2]v xeA#u
J System.err.println("文件下载结束!"); bB6[Xj{ } gv.6h{Ut catch(Exception e){e.printStackTrace ();} ;O=h$8] } ;JTt2qQKo M$S]}
kgW @RD| //获得文件长度 !1Y&Y@ze public long getFileSize() b"CAKl { :1aL
? int nFileLength = -1; bS^WhZy'( try{ @WOM#Kc URL url = new URL(siteInfoBean.getSSiteURL()); vq'k|_Qi= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =/9^,
6Q( httpConnection.setRequestProperty("User-Agent","NetFox"); Fx#jV\''s p*qPcuAA HuI`#.MpWE int responseCode=httpConnection.getResponseCode(); \8v91g91f if(responseCode>=400) h*l&RR:i { wpo1
processErrorCode(responseCode); ^k/i-%k0 return -2; //-2 represent access is error Op}ZB: } ^DAu5 |--R 0D ~
Tga) E4oz|2!m String sHeader; m&Y i!7@( C/@LZ OEL fi%r<]@ for(int i=1;;i++) p{tK_ZBy]c { %s=Dj2+ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %J7UP4 //Utility.log(in.readLine()); .#w6%c@ sHeader=httpConnection.getHeaderFieldKey(i); w#y2_ if(sHeader!=null) (Tvcq { SNY (* if(sHeader.equals("Content-Length")) $dg9z}D { c:hK$C)T nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l54
m22pfv break;
vNDu9ovs- } 6NLW(?]
} M {a
# else \
v2H^j/ break; {6,|IGAq
V } LR&_2e^[ } tw K^I6@ catch(IOException e){e.printStackTrace ();} 1=)r@X/6d catch(Exception e){e.printStackTrace ();} UT]?;o" -4 Ux,9& "Ij I'c Utility.log(nFileLength); AHbZQulC r@}bDkx xyeA2Y return nFileLength; 4g` jd } [~mGsXV =JO^XwUOo Paf%rv2 //保存下载信息(文件指针位置) |%7cdMC private void write_nPos() q9*MNHg} { jgu*Y{ocm try{ -"TR\/ output = new DataOutputStream(new FileOutputStream(tmpFile)); pV\YG B+ output.writeInt(nStartPos.length); LBlN2)\@ for(int i=0;i<nStartPos.length;i++) 6(V
/yn~ { IApT'QNM // output.writeLong(nPos); >,5i60Q output.writeLong(fileSplitterFetch.nStartPos); #/-_1H output.writeLong(fileSplitterFetch.nEndPos); `dkV_ O0 } 2Aq~D@,9=: output.close(); N/F$bv } ^Z,q$Gp~P catch(IOException e){e.printStackTrace ();} l*
dV\ B catch(Exception e){e.printStackTrace ();} vZAv_8S) } 5er@)p_ bud&R4+ x?,9_va] //读取保存的下载信息(文件指针位置) Lc2QXeo8 private void read_nPos() q!lP"J { P,xwSvO#M try{ '+y_\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wa09$4>_w int nCount = input.readInt(); 4B[D/kIg nStartPos = new long[nCount]; E1V^}dn nEndPos = new long[nCount]; 7}o/: for(int i=0;i<nStartPos.length;i++) HIc a nk { rNN
j0zw> nStartPos = input.readLong(); uGH?N nEndPos = input.readLong(); LF<wt2?* } -_A$DM!^=w input.close(); \Ad7
G i~ } kBWrqZ6 catch(IOException e){e.printStackTrace ();} ](0mjE04<d catch(Exception e){e.printStackTrace ();} GHc/Zc"iX } ?A*Kg;IU Fwg^(;bL t'qL[r%? private void processErrorCode(int nErrorCode) /BA{O&Ro^ { al^!,ykc System.err.println("Error Code : " + nErrorCode); x_w~G]! / } 0BU=)Swku ja=w5 Qs 2.ef? //停止文件下载 <,@%*G1- public void siteStop() #J\rv' { *|:Q%xr- bStop = true; 7L(eh7 for(int i=0;i<nStartPos.length;i++)
Gwec4D fileSplitterFetch.splitterStop(); J>0b1 >4i>C 1}m3; } IVvtX} } -yH,5vD //负责部分文件的抓取 UXr5aZ7y **FileSplitterFetch.java S6i@"h5 */ }^ FulsC package NetFox; l$Gl'R>>* o+ O}Te S]/b\B.h+ import java.io.*; n%%7KTqu import java.net.*; ht97s
uXZg1F) [3/VCYje public class FileSplitterFetch extends Thread { %Q"(/jm? P7 y q^| q3e8#R)l String sURL; //File URL }(FPV*mS long nStartPos; //File Snippet Start Position r`'y?Bra; long nEndPos; //File Snippet End Position R=)55qu int nThreadID; //Thread's ID wD\ZOn_J boolean bDownOver = false; //Downing is over f>9s!Hpu_ boolean bStop = false; //Stop identical ??qq: `s FileAccessI fileAccessI = null; //File Access interface k) \gWPH %CnxjtTo a>mMvc" public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @\P4/+"9 { y*b3&%.ml this.sURL = sURL; ;iYff N this.nStartPos = nStart; u0s8yPA this.nEndPos = nEnd; T/r#H__` nThreadID = id; p]G3)s@> fileAccessI = new FileAccessI(sName,nStartPos);//定位 w!^~<{Kz } G 7LIdn= ]2SF9p_ \fWW' public void run() 'cZN{ZMWG { 4\otq%Y while(nStartPos < nEndPos && !bStop) 0$ .m_0H { |Bo .4lX dE`-\J d=* x#In try{ MmTC=/j URL url = new URL(sURL); D1s4`V - HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?*"srE,#JX httpConnection.setRequestProperty("User-Agent","NetFox"); 4$6T+i2E
String sProperty = "bytes="+nStartPos+"-"; F'm(8/A$ httpConnection.setRequestProperty("RANGE",sProperty); i{c@S:&@^ Utility.log(sProperty); ;az5ZsvN
D xG2+(f#C1 8P' ana InputStream input = httpConnection.getInputStream(); m#e3%150{ //logResponseHead(httpConnection); {D&9UZm ]88];?KS} !c#]?b% byte[] b = new byte[1024]; xJ8%<RR!t int nRead; X|LxV] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;QCrHqRT` { H6TD@kL9Wr nStartPos += fileAccessI.write(b,0,nRead); v4/-b4ET //if(nThreadID == 1) ZAKeEm2A // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6=hk=2]f } RIn9(r FqFapRX66Z cgu~ Utility.log("Thread " + nThreadID + " is over!"); h@{_duu bDownOver = true; |J5 =J //nPos = fileAccessI.write (b,0,nRead); 9O*_L:4o } H].y w9 catch(Exception e){e.printStackTrace ();} $(pF;_W } ;
0v>Rfa } | t QiFC fnKY1y]2+ :aLT0q!K //打印回应的头信息 6.1)IQkO public void logResponseHead(HttpURLConnection con) u"xJjS { K0pac6] for(int i=1;;i++) sM[I4.A3 { _6@hTen` String header=con.getHeaderFieldKey(i); UaG1c%7?X if(header!=null) 3riw1r;Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); n.oUVr=nX Utility.log(header+" : "+con.getHeaderField(header)); @F*wg else fl\aqtF break; J8a*s`ik } 'J)2g"T@ } `Mj}md;O" -f1k0QwL ![6EUMx public void splitterStop() TJ8E"t*) { +k<w!B*
bStop = true; x`RTp:# } >O9o,o/6R ]q5`YB%_ 3uu~p!2 } <bck~E &QX`NO6 7}O.wUKw% /* D#A~Nbc **FileAccess.java }ArpPU
:] *//文件访问(定位,写) {Rq1HH package NetFox; ~ I}9;XT import java.io.*; ?|{XZQ~ 3oZ=k]\ rZPT89M6 public class FileAccessI implements Serializable{ N/QiI.V6 LK9g0_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $4FX(O0Q@ RandomAccessFile oSavedFile; 8e~|.wOL long nPos; g?v\!/~(u ?jQ](i& V! |qYM. public FileAccessI() throws IOException >kZ57, { qB]i6* this("",0); /.Nov } fQK"h
/2M.~3gQ rx"s!y{!- public FileAccessI(String sName,long nPos) throws IOException RR;AJ8wd { ma$Prd oSavedFile = new RandomAccessFile(sName,"rw"); vR6Bn this.nPos = nPos; |H}m 4-+* oSavedFile.seek(nPos); ixm&aW6< } iTh:N2/-vc PYRd]%X ^I6^g public synchronized int write(byte[] b,int nStart,int nLen) zjL.Bhiud { $/1c= Y@ int n = -1; f&,{XZ try{ dBV7Te4L oSavedFile.write(b,nStart,nLen); F(#rQ_z] n = nLen; ,bE$| x' } y;?ie]3G catch(IOException e) JPM))4YDR { Z+`{ 7G?4m e.printStackTrace (); +z9@:L } 1=7jz]t H y"x ;< )~Y- return n; oY~ Dg } ~n')&u{ Z4$cyL'$P [
=x s4= } Rv,JU6>i t&Os;x?To? /y7M lU9 /* 9mc!bj^811 **SiteInfoBean.java R2L;bGI*J */ vzel# package NetFox; Y!q!5Crfi d%I"/8-J C9DJO:f.2y public class SiteInfoBean { H2xeP%;$ o`zr> I\?9+3 XnQ private String sSiteURL; //Site's URL . #Z+Z private String sFilePath; //Saved File's Path R:JX<Ba private String sFileName; //Saved File's Name Ll4bdz, private int nSplitter; //Count of Splited Downloading File C'=k<- !|q<E0@w\ %S`
v!*2 public SiteInfoBean() YJS{i {//nSplitter的缺省值为5 &bz:K8c //default value of nSplitter is 5 1pv}]&X this("","","",5); o~FRF0f*VP } 49Df?sx *tOG*hwdT GT hL/M
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) UmnE@H"t$\ { e6X[vc|Y} sSiteURL= sURL; -"Y{$/B sFilePath = sPath; D9mz9
sFileName = sName; j#~Jxv%n this.nSplitter = nSpiltter; gw`B "c| Ee1LO#^_6 +#b:d=v! } 0c.s
- }),w1/#5u8 t&5%?QyM public String getSSiteURL() be5,U\&z { {u!)y?}I- return sSiteURL; &~UJf4b|A } nhSb~QqEh )5JU:jNy =K&\E2kA4 public void setSSiteURL(String value) ]`g<w# { rPc7(,o* sSiteURL = value; w#JJXXQI } M'`;{^< y~
G.V,0 Zn,>]X public String getSFilePath() <X TU8G { PN~@ return sFilePath; S.B<pjgt } $qF0ltUQ t:JI!DR
%dErnc$ public void setSFilePath(String value) Iu~\L0R427 { 8,O33qwH sFilePath = value; %xlqF< } v{i7h|e =.|J!x OI}
&m^IOo public String getSFileName() d0hhMx6$ { Y
$g$x<7 return sFileName; p\C%% } wpA`(+J % |q0-x G>YAJo public void setSFileName(String value) (vR 9H(# { a</D_66 sFileName = value; r4x3$M c } \^1+U JU L.xZ_ 6 _<$>*i
R public int getNSplitter() krq/7| { Z'^U ad6 return nSplitter; {Z; jhR, } jNwjK0? /$n ~lf c[}(OH public void setNSplitter(int nCount) C
]Si|D { 6m .k;' nSplitter = nCount; ~,D@8tv } p3ISWJa! } `"i Y* Q@e[5RA+] Mcw4!{l` /* n[Zz]IO,g **Utility.java , "jbq~ */ pqvOJ#?Q}= package NetFox; gIR^)m r
_,_5
@0e :"6q,W public class Utility { Nf+b"&Zh` $d+DDm1o j9qREf9) public Utility() f:zFFpP.j@ { ,3v+PIcMM+ s#h8%[' Q|}aR:4 } |CgnCUv+ ]U[X1W+@ //线程睡眠 #6+FY+/ public static void sleep(int nSecond) rA0,`}8\ {
N-lGa@ j try{ 6*9}4` Thread.sleep(nSecond); h:XzUxL\ } 8,?v?uE catch(Exception e) -3Avs9`5 { [LT^sb e.printStackTrace (); IM=bK U } 0Q1FL MLV } @RD+xYm #5sD{:f` //日志 bLz*A- public static void log(String sMsg) kH*P n' { *IlaM'[* System.err.println(sMsg); yTE%hHH]&[ } aYL|@R5;e KDi|( |(
(zTf public static void log(int sMsg) [#" =yzR<3 { *y`%]Hy< System.err.println(sMsg); j^`X~gE } F}J-gZl } /9Q3iV$I] nM=e]qH Y**|N8e /* 4!$
M q;U **TestMethod.java -7WW[
w */ HQ!Xj.y package NetFox; puSLqouTM fQWIw R7oj# public class TestMethod { %v5R#14[n jD){I e"-X U@`k1 public TestMethod() W[[oSqp { ///xx/weblogic60b2_win.exe gOT+%Ab{_ try{ )/4(e?%= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |sqZ $Mu //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); MB);!qy SiteFileFetch fileFetch = new SiteFileFetch(bean); Q_*_?yf fileFetch.start(); L;_c|\% } dNY"]b catch(Exception e){e.printStackTrace ();} .=9s1~] y$Zj?Dd# >1L=,M } PZ:u_*Vu` I^*'.z!4Q 1`f_P$&Z_J public static void main(String[] args) @
\.;b9 { "SWMk! new TestMethod(); -9P2`XQ^ } ,Y_{L|:w } sfp,Lq` 点击下载更多相关资料
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