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/* pz^<\ **SiteFileFetch.java VUU]Pu &
*/ > Vb@[ package NetFox; yWPIIWHx! import java.io.*; tEd.'D8 s import java.net.*; qgt[ ~i* USJ-e 2pHR_mrb public class SiteFileFetch extends Thread { z~6y+ Upl6:xYrG }`VDD?M SiteInfoBean siteInfoBean = null; //文件信息Bean R long[] nStartPos; //开始位置 N8cAqr long[] nEndPos; //结束位置 >>d m}X FileSplitterFetch[] fileSplitterFetch; //子线程对象 9D\4n long nFileLength; //文件长度 AT
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H boolean bFirst = true; //是否第一次取文件 ;|%dY{L- boolean bStop = false; //停止标志 n]W_e File tmpFile; //文件下载的临时信息 ewNz%_2 DataOutputStream output; //输出到文件的输出流 \h<BDk* Rn%N&1
Ef //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) qr\!*\9 public SiteFileFetch(SiteInfoBean bean) throws IOException oj,lz? { '&O/g<Z}q siteInfoBean = bean; jd`},X / //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); O^>jdl!TZ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); {Ee>n^1 if(tmpFile.exists ()) _;A $C( { [mxTa\ bFirst = false; ExSe=4q# read_nPos(); /T^ JS } ylf[/='0K else !%<^K.wG { _?7#MWe& nStartPos = new long[bean.getNSplitter()]; /e\{
nEndPos = new long[bean.getNSplitter()]; egR9AEJvz } <<9Va. m^%|ZTrwN7 I:(m aMc ^_I} x)i*@ } +YOKA* /5AW?2) !2CL1j0( public void run() >4m'tZ8 { M
x5`yT7 //获得文件长度 Hs"(@eDV&J //分割文件 gMWBu~;! //实例FileSplitterFetch u/b7Z`yX} //启动FileSplitterFetch线程 :H6FPV78 //等待子线程返回 X C86-b)E try{ L(;WxHL if(bFirst) wmNHT _ { 3OyS8` nFileLength = getFileSize(); ~jU/<~s if(nFileLength == -1) 87!C@XlK_ { n>,L=wV System.err.println("File Length is not known!"); .Hhh i } foF19_2 , else if(nFileLength == -2) {s?M*_{| { )/ Ud^wi System.err.println("File is not access!"); ]e:/" } JE5 else ;?fS(Vz~ { _Jz8{` " for(int i=0;i<nStartPos.length;i++) RT/o$$ { 4rK{-jvh>m nStartPos = (long)(i*(nFileLength/nStartPos.length)); %z]U LEYrZ } h<<>3 A for(int i=0;i<nEndPos.length-1;i++) u*S=[dq { dhg~$CVO nEndPos = nStartPos[i+1]; gieN9S } 6dH }]~a nEndPos[nEndPos.length-1] = nFileLength; z2gk[zY& } !2\ r LN } E"iUq Kr'f- { p=GWq(S6 //启动子线程 t9
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; DDT_kK; for(int i=0;i<nStartPos.length;i++) zIC;7 5# { qL6c`(0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +i ?S siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), M$4k; nStartPos,nEndPos,i); ?PA$Ur21lw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1sE?YJP- fileSplitterFetch.start(); z't??6 } CHd9l]Rbe // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (YBMsh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); T#%/s?_>. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5*PYT=p} nEndPos = " + nFileLength); #&<)! YY5 // fileSplitterFetch[nPos.length-1].start(); N- e$^pST TlAR.cV ;Mm7n12z C //等待子线程结束 ]$ afC!Z //int count = 0; AT2v!mNyCw //是否结束while循环 G)#$]diNuX boolean breakWhile = false; !f>d_RG -aRU]kIf AL/?,%F while(!bStop) 7*j
(* { M)*\a/6?{ write_nPos(); @uo ~nF j, Utility.sleep(500); tMj;s^P1 breakWhile = true; 5tJ,7Y' kK8itO }nt*
[:% for(int i=0;i<nStartPos.length;i++) |r
ue=QZ { z"D.Bm~ ] if(!fileSplitterFetch.bDownOver) 7\_o.(g#- { I8oo~2Qw breakWhile = false; ly% F."v break; aKU*j9A?;Z } "~UUx"Y } 0CSv10Tg if(breakWhile) Z,BC* break; C]^H& /TS=7J# =to=8H- //count++; ?!qY,9lhH //if(count>4) '`'GK&) // siteStop(); yA{W } B?VhIP e V"cKJ;s &d7Z6P'`G System.err.println("文件下载结束!"); **69rN } tx?dIy; catch(Exception e){e.printStackTrace ();} v}WR+)uFQ } 6c0>gUQx- >#ZUfm{k$ 5SCKP<rb //获得文件长度 "~TA SX_? public long getFileSize() KfF!{g f { 8* Jw0mSw int nFileLength = -1; %s19KGpA try{ Z{?G.L*/ URL url = new URL(siteInfoBean.getSSiteURL()); q7u'_R,; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (8_\^jJ httpConnection.setRequestProperty("User-Agent","NetFox"); \.M*lqI 1;<R#>&,* <\?wAjc, int responseCode=httpConnection.getResponseCode(); hY`\&@ if(responseCode>=400) OtFh,}E { hy|b6wF& processErrorCode(responseCode); 9@+5LZR return -2; //-2 represent access is error z3?o|A }/W } HSq}7S&U vloF::1 }@.|?2b + String sHeader; "Ks,kSEzu +SJd@y@fR >:lnt /N3 for(int i=1;;i++) Jmx Ko+- { Sp@-p9# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +^;JS3p@\ //Utility.log(in.readLine()); [$[:"N_ sHeader=httpConnection.getHeaderFieldKey(i); k{t`|BnPKB if(sHeader!=null) ~i 7^P9 { >LDhU%bH if(sHeader.equals("Content-Length")) #c2ymQm { Y`?-VaY nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l&?ii68/ break; r&FDEBh } $M Jm*6h } e1P"[|9>R else sJNFFOz break; orb_"Qw } 5ZBKRu } $8BPlqBIZ catch(IOException e){e.printStackTrace ();} "Wx]RN: catch(Exception e){e.printStackTrace ();} =FD;~ 5eWwgA ({o'd=nO Utility.log(nFileLength); 4bgqg0z> NFv>B> ={u0_j
W return nFileLength; &\_iOw8 } mkR2i> Vx-7\NB /t(C>$ }p //保存下载信息(文件指针位置) }}<z/zN&^ private void write_nPos() Rn@#d} { Q$fmD try{ !^ _"~ output = new DataOutputStream(new FileOutputStream(tmpFile)); Q`D_|L output.writeInt(nStartPos.length); Od|$Y+@6 for(int i=0;i<nStartPos.length;i++) "!EcbR { HJY2#lSha6 // output.writeLong(nPos); =Qn ;_+Ct output.writeLong(fileSplitterFetch.nStartPos); '}9JCJ output.writeLong(fileSplitterFetch.nEndPos); W|o'& } #BSTlz output.close(); 'PP#^aI, } 0P]E6hWgg catch(IOException e){e.printStackTrace ();} h?pkE catch(Exception e){e.printStackTrace ();} FJd]D[h } FLY
Ca c;'[W60 Q1z;/A$Al //读取保存的下载信息(文件指针位置) Hik3wPnp private void read_nPos() }C|dyyr { *Aa?yg:= try{ wKsT7c' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Cn[0(s6 int nCount = input.readInt(); kTvd+TP4 nStartPos = new long[nCount]; Kde9
$ nEndPos = new long[nCount]; 2r ZxSg for(int i=0;i<nStartPos.length;i++) /Js7`r=Rx { fS`$'BQ nStartPos = input.readLong(); o-Ga3i 8 nEndPos = input.readLong(); NhYLtw^u } Kx%Sku<F' input.close(); jNC4_q& } -bU oCF0 catch(IOException e){e.printStackTrace ();} NW&b&o catch(Exception e){e.printStackTrace ();} {qa Aq%' } x UD-iSY )d>!"JB- HC}YY2 private void processErrorCode(int nErrorCode) +PuPO9jKO@ { }O4^Cc6 System.err.println("Error Code : " + nErrorCode); w4d--[Q } ]: ~OG@( 9uQ 4u/F $
<#KA3o\ //停止文件下载 X7g1:L1Ys public void siteStop() >:|q&|x- { ;/rXQe1 bStop = true; : 7`[$<~E for(int i=0;i<nStartPos.length;i++) +@/"%9w fileSplitterFetch.splitterStop(); n .RhxgC< #"5 Dk#@ ksN+?E4w } \<)9?M : } AlIpsJ[UU //负责部分文件的抓取 o$Z6zm xO **FileSplitterFetch.java [Yc G(^^ */ d|yAs5@ package NetFox; '`uwJ&@ `6xkf&Kt @ >U-t{W import java.io.*; f|tjsZxQ import java.net.*; A?pbWt~} Q{lpKe0 '5|h)Q5 public class FileSplitterFetch extends Thread { KW^7H fu]s/'8B XnWr5-; String sURL; //File URL j_.5r&w long nStartPos; //File Snippet Start Position ] A+?EE2/ long nEndPos; //File Snippet End Position T]=r Co int nThreadID; //Thread's ID {>)#HD boolean bDownOver = false; //Downing is over }=]M2} boolean bStop = false; //Stop identical yLQ*"sw\ FileAccessI fileAccessI = null; //File Access interface n@,G8=J? Xn%pNxUL csW43& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException FK5<6n,U { n4#;k=mA this.sURL = sURL; pv Gf\pu this.nStartPos = nStart; b7p@Dn?E this.nEndPos = nEnd;
{*I``T_+ nThreadID = id; uW}s)j. fileAccessI = new FileAccessI(sName,nStartPos);//定位 RpD=]y!5_ } <yH4HY n74V|b6W io{@^1ab public void run() In<n&ib { [c|]f_ZdK while(nStartPos < nEndPos && !bStop) ?1K#dC52# { l)&X$3? tz jGpN,/VQa /*X2c6<d try{ O4V.11FnW URL url = new URL(sURL); 75/(??2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); jT]0WS-b httpConnection.setRequestProperty("User-Agent","NetFox"); &N\jG373 String sProperty = "bytes="+nStartPos+"-"; s)6U_ httpConnection.setRequestProperty("RANGE",sProperty); ov_j4j>6P Utility.log(sProperty); z;|A(*Y K+3IWZ&+dG ='s(| InputStream input = httpConnection.getInputStream(); #x 177I\ //logResponseHead(httpConnection); q$B>|y U rzm:Yx Kk-S}.E byte[] b = new byte[1024]; \b?" b int nRead; &)AVzN+*h while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) IpcNuZo9& { $+Z) nStartPos += fileAccessI.write(b,0,nRead); <~n"m //if(nThreadID == 1) pxCK;] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '+?"iVVo } OHb[qX\ !`,Sfqij 4'a=pnE$
Utility.log("Thread " + nThreadID + " is over!"); ]<cK"; bDownOver = true; odjT:Vr //nPos = fileAccessI.write (b,0,nRead); ujR_"r|l } w~"KA6^ catch(Exception e){e.printStackTrace ();} ToXki, } $Bs {u=+w } kT"Kyd zxbpEJzpn 7BK0}sxO //打印回应的头信息 \KQ71yqY public void logResponseHead(HttpURLConnection con) YkniiB[/ { 'E/^8md> for(int i=1;;i++) vdx0i&RiL { $o0iLFIX/ String header=con.getHeaderFieldKey(i); jv%kOovj if(header!=null) {=!b/l;@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); &]v4@%<J Utility.log(header+" : "+con.getHeaderField(header)); \Zqng else HkUWehVm break; x7:s]<kE } )FF>IFHG } uW@oyZUj %,6#2X nX%
UEM(@zD] public void splitterStop() aJ-K? xQ { i|w81p^o bStop = true; h_:C+)13`x } q)S^P> *W0y: 3dB3 vY }A } OWjk=u2Lz E:JJ3X| VY;{/.Sa /* )vjh~ybZ **FileAccess.java @SJL\{_ *//文件访问(定位,写) ]iN'x?Fo package NetFox; \W1,F6&j import java.io.*; R?~Yp?B^ tyXuG< TUV&vz{ public class FileAccessI implements Serializable{ P&9Gga^I -+ SF //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 <j*;.yyC RandomAccessFile oSavedFile; %{AO+u2i long nPos; !%^^ \, Xu<k3oD7 'Jt]7;04p public FileAccessI() throws IOException J
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{ M m[4yP% this("",0); Pz>s6 [ob } K`iv c N" #E?(vA1 MBt9SXM public FileAccessI(String sName,long nPos) throws IOException @.b+av4J { d
F9!G;V oSavedFile = new RandomAccessFile(sName,"rw"); ,uo'c_f(e this.nPos = nPos; mef<=5t oSavedFile.seek(nPos); %\D)u8} } :=/85\P0SU <,Ue
0 wfU7G[ public synchronized int write(byte[] b,int nStart,int nLen) xC*6vH]? { lG4H:[5V int n = -1; l)Pu2!Ic try{ *AoR==:ya oSavedFile.write(b,nStart,nLen); QW$G n = nLen; 6|aKL[%6 } ^* J2'X38I catch(IOException e) =U #dJ^4P { $
et0s;GBv e.printStackTrace (); ]Y2RqXA* } *of3:w \R|4( +]x LV\DBDM return n; 7![,Q~Fy } lzYEx ,_Z5m; :uWw8` } ^aH\7J@Y iVB86XZ` 62 O.?Ij /* j Dy-)2< **SiteInfoBean.java 4*Q#0`um */ 99:C"`E{ package NetFox; {DU`[:SQZg EQf[, x|mqL-Q f public class SiteInfoBean { J3n-`k8 H*[M\gN$ I_<I&{N> private String sSiteURL; //Site's URL x7~r,x(xM private String sFilePath; //Saved File's Path /lo2y?CS* private String sFileName; //Saved File's Name -amBB7g private int nSplitter; //Count of Splited Downloading File >sK!F$ J@4 Bf
K{[%7AM public SiteInfoBean() Zy o[(`y {//nSplitter的缺省值为5 R $&o*K`? //default value of nSplitter is 5 byTh/ H this("","","",5); $e*ce94 } G*-b}f OU8Lldt }UWL-TkEjF public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) jg.QRny^ { ZaL.!g sSiteURL= sURL; cUvz2TK sFilePath = sPath; (+B5|_xQu sFileName = sName; <$X3Hye this.nSplitter = nSpiltter; a'2$nbp} ynE)Xdh M7@2^G]p } 8P1=[i] *T5!{ LN@F+CyDc public String getSSiteURL() 1(|'WyD { JwAYG5W return sSiteURL; ;i<|9{; } eD*A) Zo g']= ;4.!H,d public void setSSiteURL(String value) l]8D7(g { PX<J&rx sSiteURL = value; {=F/C,- } yF"1#{*y 0l-Ef1 OH">b6>\ public String getSFilePath() Hm%;=`:' { .6`9H 1 return sFilePath; XpBj%e: } wid;8%m |j#C|V%kV Si6al78 public void setSFilePath(String value) A?-oL=' { t.`@{R$hoA sFilePath = value; L$IQuy } r[lF<2&*R <N_+=_ @U3Vc|
public String getSFileName() N6 ( { A-T]9f9 return sFileName; Z|5?7v;h5 } C4~;y hz :9$F'd\ 9Hc$G{[a public void setSFileName(String value) ev#;t@^ { x)rM/Kq sFileName = value; \H=&`? } #m{UrTC ;)!Sp:mHX (&+kl q public int getNSplitter() .)<(Oj|4 { ~:3QBMk:: return nSplitter; 'J6
M*vO } B:!W$< JWMpPzs b#K:_ac5 public void setNSplitter(int nCount) ],Rd ySN& { uoXAQ6k nSplitter = nCount; .h>8@5/s } WnGGo'Z } 6bBB/yd *g[^.Sg J,AR5@)1 /* Er+nk`UR_ **Utility.java 2U; t(,dn' */ |m80]@> package NetFox; H
Ge0hl[n zJ)*Z,7 =9"W@n[>W public class Utility { dO4{|(z Oh'Y0_oB> IiZ&Pr public Utility() <oo { DXa-rk8 "Q?k'^@ ^",ACWF4Sk } IjR'Qou5 R8T]2?Q1 //线程睡眠 .F(i/)vaq| public static void sleep(int nSecond) /l<<_uk$ { hYM@?/(q try{ ;Hj~n+ Thread.sleep(nSecond); *
;Cy=J+ } ijdXU8 catch(Exception e) /Ne<V2AX { S}ECW,K e.printStackTrace (); !Z5[QNVaV } 8G5m{XTS( } >+
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^C4I //日志 vMs$ceq public static void log(String sMsg) `A,g] 1C: { X0M1(BJgGo System.err.println(sMsg); ]<q[Do8k } KhW;RD NU*fg`w SY^dWLf public static void log(int sMsg) f}@jFhr'< { S.d^T]( System.err.println(sMsg); %bD}m! } =pznu+, } )"m!YuS Y NSFs\a@1 sqS=qC /* zBP>jM(8 **TestMethod.java YNBHBK4; */ n9\]S7]52 package NetFox; ^+1#[E C{q :_M; %O<%UmR public class TestMethod { >N?2"" vQa'S-@u G_dsrpI=N public TestMethod() a+9*@z2 { ///xx/weblogic60b2_win.exe s9>(Jzcf9 try{ 2AVa( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); H-xFiF //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); yj$TPe_BW SiteFileFetch fileFetch = new SiteFileFetch(bean); 1 `7<2w fileFetch.start(); ;_(PVo } wV)}a5+ catch(Exception e){e.printStackTrace ();} j}AFE 2EK%N'H 2Gs$?}"a } ~6I)|^Z rJ o"fx k3t78Qg public static void main(String[] args) _HA$
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{ NKmoG\* new TestMethod(); : ~ A%# } 5c;h& } !8@*F 点击下载更多相关资料
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