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/* fOrH$? **SiteFileFetch.java 0mVNQxHI */ Z{d^- package NetFox; ~~P5k: import java.io.*; kTB0b*V import java.net.*; Zx@a/jLO[n 'LC1(V!_j gD?l-RT> public class SiteFileFetch extends Thread { $PPi5f}HD .<FH>NW) sP~<*U.7 SiteInfoBean siteInfoBean = null; //文件信息Bean j$:~Rek long[] nStartPos; //开始位置 00y!K
m_D long[] nEndPos; //结束位置 uzPVTo|= FileSplitterFetch[] fileSplitterFetch; //子线程对象 #{6/ (X long nFileLength; //文件长度 xo&_bMO boolean bFirst = true; //是否第一次取文件 mJnIwdW* boolean bStop = false; //停止标志 BxmWIItz File tmpFile; //文件下载的临时信息 ;'K5J9k DataOutputStream output; //输出到文件的输出流 w&#]-|$ *fxG?}YT //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @. l@\4m public SiteFileFetch(SiteInfoBean bean) throws IOException {P./==^0 { aXYY:; siteInfoBean = bean; e T{ 4{ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); xC TML!H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); RqrdAkg if(tmpFile.exists ()) P@B] { \\qZl)P_ bFirst = false; 59A}}.@?m read_nPos(); )akoa,#%6c } LL!Dx%JZ else 7}>E J { ki!0^t:9 nStartPos = new long[bean.getNSplitter()]; "^-a M nEndPos = new long[bean.getNSplitter()]; WT=;: j } SnfYT)Ph 4VSU8tK|N] \8cx6 G' KpGhQdR# } niyV8v HV|,}Wks6s r19
pZAc public void run()
Otuf]B^s { +\9NDfYIA //获得文件长度 H
<l7ZS: //分割文件 a=2%4Wmz //实例FileSplitterFetch ##*3bDf$-5 //启动FileSplitterFetch线程 R 9\*#c //等待子线程返回 +<C!U' try{ K%oG,-wdg if(bFirst) D,feF9 { ?tbrbkx nFileLength = getFileSize(); 5j(k:a+!H if(nFileLength == -1) ~>|ziHx { 8 Z~EwY* System.err.println("File Length is not known!"); %h@EP[\ } &8lZNv8;(p else if(nFileLength == -2) e7 o.xR { 3w'tH4C[Y System.err.println("File is not access!"); K0>zxqY } g-
gV2$I else k,*XG$2h { mzgfFNm^G) for(int i=0;i<nStartPos.length;i++) Zy/_
E@C}u { KWHY4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); 7[)E>XRE } 4WB0Pt{ for(int i=0;i<nEndPos.length-1;i++) fJg+ Ryo { U K!(G nEndPos = nStartPos[i+1]; n[rCQdM&U" } $UwCMPs X nEndPos[nEndPos.length-1] = nFileLength; ]f_p8?j" } 9*M,R,y } @yYkti;4- F^:3?JA_ a7opCmL //启动子线程 l/5
hp. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ^cWnF0)j. for(int i=0;i<nStartPos.length;i++) oB7_O-3z { _[BP0\dPW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hZb_P\1X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /n&&Um\ nStartPos,nEndPos,i); @0''k Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;uGv:$([g fileSplitterFetch.start(); *;FdD{+ } "AqB$^S9t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~xTt204S siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); KI.hy2?e // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", d'> x(Yi nEndPos = " + nFileLength); ~W/z96'
5 // fileSplitterFetch[nPos.length-1].start(); *-X[u: -{vD:Il=6 L~3Pm%{@A //等待子线程结束 7tp36 TE //int count = 0; ]4e;RV-B //是否结束while循环 /-s6<e! boolean breakWhile = false; zQ PQ =_^X3z0 Ny#^&-K while(!bStop) LP=)~K< { J}t%p(mb write_nPos(); 7+*WH|Z@ Utility.sleep(500); dh\P4 breakWhile = true; O6Y0XL O/LXdz0B cwL_tq for(int i=0;i<nStartPos.length;i++) xSu > { 6LhTBV if(!fileSplitterFetch.bDownOver) ~LC-[&$ { 30{ gI0jk breakWhile = false; ;{6~Bq9 break; "N#Y gSr } 6u%&<")4HP } ~J]qP #C if(breakWhile) <3
uNl break; m {}Lm)M PY'2h4IL P<-@h1p, //count++; +[ZY:ZQ //if(count>4) Q{/Ef[(a@ // siteStop(); ^z\cyT%7t } \. S/| F"kAkX>3} EX"yxZ~ System.err.println("文件下载结束!"); N>E_%]C h } IGgL7^MF catch(Exception e){e.printStackTrace ();} FTldR;}( } sos5Y} u@444Vzg ]@TCk8d$0 //获得文件长度 (?];VG public long getFileSize() BLFdHB.$T { 3$/IC@+ int nFileLength = -1; tBSW|0 try{ SfR%s8c` URL url = new URL(siteInfoBean.getSSiteURL()); v^PO|Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0}9h]X' httpConnection.setRequestProperty("User-Agent","NetFox"); _dg\\c }2oc#0 (%9$! v{3 int responseCode=httpConnection.getResponseCode(); T{'RV0%
if(responseCode>=400) P
{'b:C { [ hsds\ processErrorCode(responseCode); $Q0n return -2; //-2 represent access is error ]'S^] } Wl4%GB .C(tMF]D, q(}bfIf String sHeader; /RF7j; }WV:erg` w
= KPT''! for(int i=1;;i++) adw2x pj { 11lsf/IP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); EV?z`jE9 //Utility.log(in.readLine()); Xr{v~bf sHeader=httpConnection.getHeaderFieldKey(i); 0$njMnB2l if(sHeader!=null) gZ5 |UR< { g .\[o@H if(sHeader.equals("Content-Length")) < vP=zk { r
:dTz nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 'PHl$f*k break; fR|A(u#9 } 4I7>f]=) } nP$9CA else d'2A,B~_* break; y)*RV;^ } YS ][n_ } olcDt&xv] catch(IOException e){e.printStackTrace ();} j<x_ &1 catch(Exception e){e.printStackTrace ();} P* o9a NO3/rJ6- K%d&EYoW] Utility.log(nFileLength); e;jdqF~v! H#&00 Q[ UI#h&j5pW return nFileLength; `2snz1>!j } _j3f Ar(V @.C2LIb >V~E]P%@ //保存下载信息(文件指针位置) a
=QCp4^ private void write_nPos() $C\BcKlmv { HP=+<]?{G try{ z @Y;r=v output = new DataOutputStream(new FileOutputStream(tmpFile)); xA/D' output.writeInt(nStartPos.length); ]tD]Wx% for(int i=0;i<nStartPos.length;i++) KSvE~h[#+ { l\mPHA23 // output.writeLong(nPos); pUTr!fR output.writeLong(fileSplitterFetch.nStartPos); +0~YP*I`/ output.writeLong(fileSplitterFetch.nEndPos); :>*7=q= } PdCEUh\>y output.close(); Ib`XT0k } ]3gSQ7 catch(IOException e){e.printStackTrace ();} E3i4=!Y catch(Exception e){e.printStackTrace ();} dscgj5b1~ } +H.`MZ= <!+Az,- -%~4W? //读取保存的下载信息(文件指针位置) ~`/V(r;o private void read_nPos() R@0R`Zs { /mMV{[ try{ 1,~D4lD| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); KP"+e:a% int nCount = input.readInt(); SIllU nStartPos = new long[nCount]; Th%zn2R B nEndPos = new long[nCount]; R=dC4; for(int i=0;i<nStartPos.length;i++) GmG5[?) { nu^436MSOa nStartPos = input.readLong(); =I4lL]> nEndPos = input.readLong(); >0gW4!7Y } [e
q&C_|D input.close(); ),)lzN%! } @,}UWU catch(IOException e){e.printStackTrace ();} cR{#V1Z catch(Exception e){e.printStackTrace ();} S3#>9k;p } : +u]S2u{ R/_&m$ZB G)YcJv7 private void processErrorCode(int nErrorCode) H.;Q+A,8^ { q| 7( System.err.println("Error Code : " + nErrorCode); LscGTs, } O2+ 6st i1085ztN .d*8C, //停止文件下载 us.~G public void siteStop() RNL9>7xV { Y@v>FlqI{ bStop = true; ;|RTx for(int i=0;i<nStartPos.length;i++) .X&9Q9T=# fileSplitterFetch.splitterStop(); {_}I!`opr$ t:S+%u U ~~.}ah/_d } b$7 +;I; } @ZJS&23E //负责部分文件的抓取 'R)Tn!6 **FileSplitterFetch.java [;N'=]` */ yu|>t4#GT package NetFox; zCA2X
!7F m'U0'}Ld};
y7{?Ip4[ import java.io.*; ;"I^ZFYX import java.net.*; @iiT< )+^+sd #Y!a6h+ public class FileSplitterFetch extends Thread { TpaInXR Y2TtY; !Cs_F&l"j String sURL; //File URL s.rm7r@# long nStartPos; //File Snippet Start Position A,]h),b long nEndPos; //File Snippet End Position V#HuIgf- int nThreadID; //Thread's ID Sz~OX6L boolean bDownOver = false; //Downing is over :s,Z<^5a)g boolean bStop = false; //Stop identical [^)g%|W FileAccessI fileAccessI = null; //File Access interface zA 3_Lx! y-k.U% e.> P8C<& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4*L_)z&4; { (Z*!#}z` this.sURL = sURL; +vH4MwG$.& this.nStartPos = nStart; gi8FHSU|G this.nEndPos = nEnd; '91/md5 nThreadID = id; ?[AD=rUC fileAccessI = new FileAccessI(sName,nStartPos);//定位 /z!%d%" } w]H->B29C :/#rZPPF 5R-6ji public void run()
XX@ZQcN { Y73C5.dNcE while(nStartPos < nEndPos && !bStop) do%&m]#; { |>Vb9:q9Po *|0 -~u%q <} .$l try{ eDMO]5}Ht URL url = new URL(sURL); 6<]lW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); . vV|hSc httpConnection.setRequestProperty("User-Agent","NetFox"); \G[$:nS String sProperty = "bytes="+nStartPos+"-"; q'DW~!>qX httpConnection.setRequestProperty("RANGE",sProperty); M7T5
~/4 Utility.log(sProperty); bsX[UF QY/w ZH8,KY" InputStream input = httpConnection.getInputStream(); DF= *_,2/ //logResponseHead(httpConnection); >j/w@Fj paK2xX8E ]`K2N byte[] b = new byte[1024]; w}KkvP^ int nRead; Oz95 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Nc`L;CP { %Zi} MPx nStartPos += fileAccessI.write(b,0,nRead); +rd+0 `}C //if(nThreadID == 1) ]/Pn
EU[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WJ#[LF!e } siI;"? A&VG~r$ *pq\MiD/ Utility.log("Thread " + nThreadID + " is over!"); \dVOwr bDownOver = true; HtFDlvdy] //nPos = fileAccessI.write (b,0,nRead); :>
'+"M2r } icgfB-1|i catch(Exception e){e.printStackTrace ();} uFE)17E } U6K|fYN` } Vksuu@cch ]G\}k aUp
g u" //打印回应的头信息 r@V!,k#S public void logResponseHead(HttpURLConnection con) vN:Ng { Y4-t7UlS; for(int i=1;;i++) d=(mw_-? { ^[[P*NX3 String header=con.getHeaderFieldKey(i); K0~rN.C!0 if(header!=null) Tk}]Gev //responseHeaders.put(header,httpConnection.getHeaderField(header)); DQ3<$0 Utility.log(header+" : "+con.getHeaderField(header)); ~$'awY else N7"W{"3D break; Vr}'.\$ } 3`g^ } )5,v!X) <I?Zk80 ]Ze1s02( public void splitterStop() c{|p.hd { m0wDX*Qn bStop = true; la!~\wpa } G{}VPcrbC CJY$G}rk V
gWRW7Se } 1}x%%RD_ N8jIMb'< +(Ae4{z"1+ /* K+eM **FileAccess.java 4(+PD&_J *//文件访问(定位,写) Z@HEj_n package NetFox; q V=!ORuj import java.io.*; vh^VxS (.:e,l{U% XFl6M~ c public class FileAccessI implements Serializable{ 7!1S)dup D.:Zx //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?<!| RandomAccessFile oSavedFile; wk^B"+Uhy long nPos; 6k%f HMXE$d=[ *dQSw)R public FileAccessI() throws IOException Gc?a +T { z{
dEC % this("",0); )~>YH*g } "oyo#-5z yi[x}ffdE F9^S"qv$ public FileAccessI(String sName,long nPos) throws IOException )%TmAaj9d {
a?1Wq oSavedFile = new RandomAccessFile(sName,"rw"); }MySaL> this.nPos = nPos; W?&%x(6M oSavedFile.seek(nPos); k$Vl fQ'+ } 4g/dP^ h[ ZN+M Py<}S-: public synchronized int write(byte[] b,int nStart,int nLen) u8^lB7!e/ { T{"(\X$ int n = -1; BT$_@%ea& try{ ?dTD\)%A oSavedFile.write(b,nStart,nLen); rv;3~'V n = nLen; y =@N|f! } 7<4qQ.deE catch(IOException e) )b)z m2; { \8tsDG(1 ' e.printStackTrace (); +ZYn? #IQ } UiWg<_<t 3|7QUld ]:;&1h3'7 return n; AA_%<zK } ]9-\~Mwh M|-)GvR$J _F{C\} } 2%1hdA< PF2nLb2- [aS*%Heu /* & kIFcd@ **SiteInfoBean.java y(Td/rY. */ 6*?F @D2& package NetFox; 0(Ij%Wi, i4Jc.8^9$
c> af public class SiteInfoBean { =41xkAMnk X]=t> !k%#R4*> private String sSiteURL; //Site's URL )"LJ
hLg private String sFilePath; //Saved File's Path ijcm2FJcG private String sFileName; //Saved File's Name n%-0V> private int nSplitter; //Count of Splited Downloading File g`^x@rj`E $M#>9QHhc 0c&+|>! public SiteInfoBean() l2d{ 73h {//nSplitter的缺省值为5 d _
e WcI //default value of nSplitter is 5 wzaV;ac4K this("","","",5); *"kM{*3:v } hph4 `{T \jA~9 >7r!~+B"9' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #g=XUZ/" { Q&&@v4L sSiteURL= sURL; *VeRVaBl sFilePath = sPath; g>sSS8RO sFileName = sName; ^.G$Q# y, this.nSplitter = nSpiltter; *A< 5*Db:F fnY.ao1-s[ DMS!a$4
} ]9XDS[<2` _U0f=m /bEAK- public String getSSiteURL() fh{`Mz,o { 2oU_2P return sSiteURL; 9cgUT@a } ;]fs'LH /> Nt[o[r fV:83|eQ public void setSSiteURL(String value) ^(<f/C)i { iUwzs&frd sSiteURL = value; S$k&vc(0 } Wf<LR3 bfO=;S]b! {U1m.30n public String getSFilePath() kl,3IKHa { nd(S3rct& return sFilePath; ~4"dweu? } m3ff;, <1pEwI~ J=L5=G7( public void setSFilePath(String value) B;WCTMy} { 66 Tpi![ sFilePath = value; iCyfOh } v@Ox:wl> 6r_)sHf LF7SS;&~f public String getSFileName() Ve=b16H { Df#l8YK# return sFileName; &[SC|=U'M } MW{8VH6+ QM]YJr3rE 4 OX^( public void setSFileName(String value) `lPfb[b { |)81Lz sFileName = value; D6^6}1WI } VD :/PL \;-|-8Q C-[1iW' public int getNSplitter() qw8Rlws% { $g7<Y*t[ return nSplitter; ]:f%l
mEy } gNhQD*+>{ LK"69Qx?5q UDni]P!E public void setNSplitter(int nCount) p$>l7?h { Q&V;(L62! nSplitter = nCount; A9JdU& } /=, nGk> } kwA$Z!Rn %#}Z y
x;')9/3 /* O<\@~U **Utility.java h@h! ,; */ V_:&S2j package NetFox; r4f~z$QK )Beiu* ^KELKv,_ public class Utility { ${)b[22": ,=:D ]cN1c} public Utility() 6DWgl$[[ { BCcjK6' eN~=*Mn(za pBPl6%C.X- } U3:j'Su4H? e*n@j //线程睡眠 orvp*F{7[H public static void sleep(int nSecond) Y5d \d\e/ { 65m"J' try{
EU/8=JA1 Thread.sleep(nSecond); W"3ph6[eW } i2^>vYCsl catch(Exception e) Ip]KPrwp { Pco'l#: e.printStackTrace (); Jdp3nzM^^@ } 7`hP?a= } ;]jNk'oa 2,P^n4~A?w //日志 K!]/(V(} public static void log(String sMsg) hDq`Z$_+KX { @Pzu^ System.err.println(sMsg); ED&
`_h7? } I15{)o(8$ Y7[jqb1D FjI`uP public static void log(int sMsg) 4X(H; { wuJ4kW$ System.err.println(sMsg); [=]4-q6UN } +XYE {E5 } '-/xyAzS #`X?=/q KFkoS0M5| /* G<^{&E+= **TestMethod.java X/M4!L}\ */ LAe6`foW/ package NetFox; Clb@$, }k
G9!sf _Z,\Vw:\F public class TestMethod { +V^;.P</ \A6B,|@ y[_Q- public TestMethod() ~PahoRS { ///xx/weblogic60b2_win.exe 84 pFc;< try{ W#C*5@ 8 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
)sp4Ie //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ^J8lBLqe SiteFileFetch fileFetch = new SiteFileFetch(bean); 'xg
Lt( fileFetch.start(); j;iAD:nf } =-lb)Z"d catch(Exception e){e.printStackTrace ();} +|89>}w4 #7YY<)
xt} ;<2G } a1y-3z cFnDmtI: &wE%<"aRAl public static void main(String[] args) c[1oww { BC<^a )D= new TestMethod(); O,h ;hQZ } f|lU6EkU } zY!j:FT1HY 点击下载更多相关资料
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