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/* XXW]0{k:y **SiteFileFetch.java =&A!C"qK4[ */ KVB0IXZC~ package NetFox; w66v\x~ import java.io.*; j8GY`f# import java.net.*; <S1?? A8pj~I/*- T[;;9z public class SiteFileFetch extends Thread { 1 -ZJT }zFf0.82 I^~=,D SiteInfoBean siteInfoBean = null; //文件信息Bean l|YT[LR7 long[] nStartPos; //开始位置 $. %L long[] nEndPos; //结束位置 LY]nl3{E FileSplitterFetch[] fileSplitterFetch; //子线程对象 kE/`n],1U long nFileLength; //文件长度 7J9l.cM3 boolean bFirst = true; //是否第一次取文件 Hm %g_Mt boolean bStop = false; //停止标志 DY9fF4[9a File tmpFile; //文件下载的临时信息 g(aZT#i i= DataOutputStream output; //输出到文件的输出流 c$0_R;4/ X8/Tl\c //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,;_rIO" public SiteFileFetch(SiteInfoBean bean) throws IOException `SV"ElRV { N&T:Lt_N siteInfoBean = bean; yN*:.al //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8-7dokg> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Dv&>*0B if(tmpFile.exists ()) xS'zZ%? { s/
M7Zl bFirst = false; kG/X"6pZ read_nPos(); UVB/vqGg } 2-++i:, g else t|}O.u-&;~ { aG%kmS&fv nStartPos = new long[bean.getNSplitter()]; 5m4DS:& nEndPos = new long[bean.getNSplitter()]; !(Krf } (;aB!(_ [,=d7*b(l _%Bz,C8 Lf. 1>s } CSL#s^4T gv#4#] Ia2(Km public void run() C.~j'5N { $>*Yhz ` //获得文件长度 rH&G<o&, //分割文件 B2 c@kru //实例FileSplitterFetch #,L~w //启动FileSplitterFetch线程 rK7W(D} //等待子线程返回 $I@GUtzjp try{ 7JUb Va% if(bFirst) z}ElpT[(; { 0DNU,u nFileLength = getFileSize(); #^6^ if(nFileLength == -1) -Ep!- a { Z%}4bJ System.err.println("File Length is not known!"); B0d%c&N${ } G@gh#[b else if(nFileLength == -2) jd 1jG2=f { jin db#)bz System.err.println("File is not access!"); igD G}q3jG } `>6T& else MRfb[p3Cx { -DP*q3 for(int i=0;i<nStartPos.length;i++) !9;)N, { =O!|IAe# nStartPos = (long)(i*(nFileLength/nStartPos.length)); /.R<,/gj
} X\Y}oa."A for(int i=0;i<nEndPos.length-1;i++) F8<"AI { G2`${aMS nEndPos = nStartPos[i+1]; hQRL,? } vE%s,E, nEndPos[nEndPos.length-1] = nFileLength; ~6`iY@) } *5k+t } FJeiY#us gAt~?HvW6 h}Rx_d //启动子线程 i?>tgmu. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0:"2MSf> for(int i=0;i<nStartPos.length;i++) mdW~~-@H { VWx]1\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %MZP)k,&U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `
#OSl nStartPos,nEndPos,i); Xc*U+M>U Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %'bJ: fileSplitterFetch.start(); VfSj E.| } e_.Gw"/Yl // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
6)qp*P$L siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); rh!;|xB|+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |mhKI is U nEndPos = " + nFileLength); eQUe
>* // fileSplitterFetch[nPos.length-1].start(); +5!&E7bcd {u"8[@@./ Apj; //等待子线程结束 H4:&%"j7 //int count = 0; s$w;q\1z //是否结束while循环 LlHa5]E@6 boolean breakWhile = false; edipA
P~! kJ{+M] pW %Jp|z? [/ while(!bStop) aI3CNeav { _{4^|{>Pv write_nPos(); fBhoGA{=g Utility.sleep(500); !m;H@KR{ breakWhile = true; ml6u1+v5 Ag9?C* iafE5b) for(int i=0;i<nStartPos.length;i++) ]y#3@ { _,haD)1g~ if(!fileSplitterFetch.bDownOver) }!p`1]gem { NI aFI( breakWhile = false; u0QzLi, break; :nA.j"@ } 6*45Vf }
=-"c*^$] if(breakWhile) NX[4PKJ0C break; /Fgw$
^H dOFD5}_ aC%&U4OS //count++; @n-r-Q //if(count>4) )5_jmW`n // siteStop(); ^7^N}x@ } e}hmS 1>H 'n;OB4 )G~w[~ System.err.println("文件下载结束!"); Ts.wh>` }
8|6
4R: catch(Exception e){e.printStackTrace ();} $q$7^r@ } i/H+xrCK CyDV r <\ `$Jx# //获得文件长度 GZip\S4Y public long getFileSize() A\fb< { l12{fpm int nFileLength = -1; g[H',)A) try{ asHxL! URL url = new URL(siteInfoBean.getSSiteURL()); as*4UT3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); TX=yPq httpConnection.setRequestProperty("User-Agent","NetFox"); IQZ#-)[T" 83%)/_& lf(`SYQnOY int responseCode=httpConnection.getResponseCode(); !-<p,z if(responseCode>=400) MUnEuhXTr { [F!Y%Zp
processErrorCode(responseCode); A@hppaP! return -2; //-2 represent access is error U8.7>ENnP& } _>+8og/%@ ]hos+;4p +{<#(} String sHeader; ":a\z(*t U*3J+Y YNwp/Y for(int i=1;;i++) km~Ll { bKg8rK u //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2i;7{7 //Utility.log(in.readLine()); :cB=SYcC% sHeader=httpConnection.getHeaderFieldKey(i); oVFnlA if(sHeader!=null) ;oZ)Wt { R;,g1m|] if(sHeader.equals("Content-Length")) >/[GTqi { >NYW{(j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wX >*H break;
#$1Z } k:jSbbQ } I[)% , jd else mKrh[nA break; 7xRl9 } &xRo^iV? } wE+${B03 catch(IOException e){e.printStackTrace ();} n3AaZp[ catch(Exception e){e.printStackTrace ();} (aOv#Vor]% {9UEq0 ry9T U Utility.log(nFileLength); >B]'fUt5a x
}Ad_#q 'AN>`\mR$ return nFileLength; hn#1%p6t } q`-;AG|xF (x/k.& X 1
57$ //保存下载信息(文件指针位置) okbQ<{9 private void write_nPos() DC{>TC[p1k { rj(T~d4 try{ }gJ (DbnV output = new DataOutputStream(new FileOutputStream(tmpFile)); 93Co}@Y;Y+ output.writeInt(nStartPos.length); 3EJt%}V$k for(int i=0;i<nStartPos.length;i++) :VTTh
|E%# { ULMu19> // output.writeLong(nPos); xJ#d1[kzo output.writeLong(fileSplitterFetch.nStartPos); ;4Y%PVz~D output.writeLong(fileSplitterFetch.nEndPos); D$t k<{)oB } ^#-nE7 output.close(); DI+fwXeg } qkiI/nH3 catch(IOException e){e.printStackTrace ();} u\C
lP# catch(Exception e){e.printStackTrace ();} `
,SiA-3* } t+9][Adf v`M3eh@$A dKdj`wB //读取保存的下载信息(文件指针位置) d_IAs private void read_nPos() &mb{.= { hCC<?5q try{ On?p 9^9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8-2cRs int nCount = input.readInt(); =Xo
=Qcr nStartPos = new long[nCount]; :Nz9xD$S5 nEndPos = new long[nCount]; J+`VujWT for(int i=0;i<nStartPos.length;i++) ."9];)2rx { B)0i:"q nStartPos = input.readLong(); AvfNwE nEndPos = input.readLong(); y&V@^"` } 9I4K}R input.close(); rx] @A } ax (c# catch(IOException e){e.printStackTrace ();} V#iPj'*
catch(Exception e){e.printStackTrace ();} V,%=AR5 } S:OO0<W xL\0B,] thI
F& private void processErrorCode(int nErrorCode) >r !|sC { $m/)FnU/ System.err.println("Error Code : " + nErrorCode); ZjF 4v } oz,e/v8~ s,]z[qB#$ zx)z/1 //停止文件下载 +mn,F}; public void siteStop() , GP?amh { HhvdqvIEG bStop = true; x^y'P<ypw for(int i=0;i<nStartPos.length;i++) y !_C/!d fileSplitterFetch.splitterStop(); %^ !,t:d JU)dr4S? v_DedVhe } 5yP\I+Fm } )v.=jup[ //负责部分文件的抓取 MB]<Dyj, **FileSplitterFetch.java 8|\8O@ */ a6uJYhS~ package NetFox; |>dI/_' fTK3,s1= ?`PvL!' import java.io.*; lE4HM$p
import java.net.*; _sTROd)Vh )8$=C#qC[ ^G}47( public class FileSplitterFetch extends Thread { tM'P m =Jyu4j *} iMDM1}b String sURL; //File URL Xg;}R:g ' long nStartPos; //File Snippet Start Position }khV'6"'| long nEndPos; //File Snippet End Position ~v|>xqWV int nThreadID; //Thread's ID `u&Rsz&^ boolean bDownOver = false; //Downing is over xD~5UER boolean bStop = false; //Stop identical DK:o]~n FileAccessI fileAccessI = null; //File Access interface q1d}{DU Yp^rR }N +[\FD; > public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `T5W}p[6 { ]1#e#M]# this.sURL = sURL; Yfzl%wc this.nStartPos = nStart; Ju1D
=b this.nEndPos = nEnd; @~"h62=]
- nThreadID = id; Ng~FEl fileAccessI = new FileAccessI(sName,nStartPos);//定位 H[U!%Z } 3 cK I 0tT(W^ho g 1SCR.@k< public void run() {tYZt4!{^ { %N>%!m while(nStartPos < nEndPos && !bStop) V{/?FO?E { @1o/0y" q_MG?re __G?0*3 G try{ \o*5 URL url = new URL(sURL); )<h*eS{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
KY$)#i httpConnection.setRequestProperty("User-Agent","NetFox"); >4TaP*_ String sProperty = "bytes="+nStartPos+"-"; r\'A
i6 httpConnection.setRequestProperty("RANGE",sProperty); o$jLzE" Utility.log(sProperty); uKUiV%p! g| I6'K!< O;:mCt _H InputStream input = httpConnection.getInputStream(); (MxQ+D\ //logResponseHead(httpConnection); MOQ*]fV: v$?+MNks |
*2w5iR byte[] b = new byte[1024]; "n(hfz0y% int nRead; >UiYL}'br6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^
*k?pJ5 { W$hx,VEy` nStartPos += fileAccessI.write(b,0,nRead); &=] ~0$ //if(nThreadID == 1) N8F~8lTi // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IP xiV]c } r*2+xDoEi Ug>~Rq] `ZYoA
t]C~ Utility.log("Thread " + nThreadID + " is over!"); V5V
bJBpf bDownOver = true; /Kql>$I //nPos = fileAccessI.write (b,0,nRead); gY/"cq } {Aw#?#GPW catch(Exception e){e.printStackTrace ();} iT3BF"ZqBO } /R]U}o^/(% } tdBm
(CsN N
+Yxz;Mg GfoLae //打印回应的头信息 [8 ]z|bM public void logResponseHead(HttpURLConnection con) AG`L64B { A5c%SCq; for(int i=1;;i++) KX ,S { ;=)k<6 String header=con.getHeaderFieldKey(i); wh$sn:J if(header!=null) <\rT%f}3^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); UZ\u;/} Utility.log(header+" : "+con.getHeaderField(header));
4":KoS`,j else V_:1EBzz break; 4;e5H_}Oo } p& y<I6a, } AYqX| 81? hY4 nLbFg0?+t public void splitterStop() h\fjBDU^ { ^ Edfv5 bStop = true; X5zDpi|Dq } +rd|A|hRq vyNxT* ,[K kbX8$xTM } _hAcJ{Y 8]M ;T>n[ 'f!8DGix /* V,lOt4b **FileAccess.java eenH0Ovv *//文件访问(定位,写) W <9T0sZ package NetFox; ,1~"eGl! import java.io.*; (y=C_wvqZ Uf1!qP/H? DEBB()6, public class FileAccessI implements Serializable{ x!?u^ Fe# 1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4n#M RandomAccessFile oSavedFile; HCIU!4rH long nPos; =Z{O<xw' y8d]9sX{ 8Q.T g. public FileAccessI() throws IOException ])[[ V!1 { OyStq i this("",0); )\1QJ$-M& } KKb,d0T[ u0}vWkn\4 sv2A-Dld public FileAccessI(String sName,long nPos) throws IOException AgWa{.`f: { &9.C l;I oSavedFile = new RandomAccessFile(sName,"rw"); WEw6He; this.nPos = nPos; ,cXD.y oSavedFile.seek(nPos); )1Y{Q Y}l } |5X^u+_ pf]xqhL Rm2yPuOU}A public synchronized int write(byte[] b,int nStart,int nLen) zKyyU}LHH { b10cuy|a/X int n = -1; tl[Uw[ try{ N,<uf@LQ oSavedFile.write(b,nStart,nLen); B*eC3ok3z n = nLen; X1:V<,}" } 5u,{6 catch(IOException e) C>]0YO
k2 { oro$wFxJO e.printStackTrace (); 0B[="rTS7# } aacpM[{f \J4L:.`qS rbul8(1h return n; &r[`>B{tP } DKH-Q(M56 ):P? AKY1o.>z } _1!7V3|^ m1j*mtu EHSlK5bD, /* mJ<=n?{Z **SiteInfoBean.java k}S :RK */ {k(g]#pP package NetFox; W4t;{b {Je[ZQ$ gBd]B03 public class SiteInfoBean { Z3%}ajPu[ CVDV)#JA oxr#7Ei0d private String sSiteURL; //Site's URL @MoKWfc private String sFilePath; //Saved File's Path ,1hxw<sNR private String sFileName; //Saved File's Name .4S.>~^7 private int nSplitter; //Count of Splited Downloading File )tG\vk=@ }?lrU.@zg cv8L-Z>x.= public SiteInfoBean() Pi=+/} {//nSplitter的缺省值为5 V#v`(j% //default value of nSplitter is 5 QZ!Y2Bz(4 this("","","",5); -Mip,EO } 9q)Kfz AWcLUe { XWnVgY s public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) K~uXO { 2{D{sa sSiteURL= sURL; u^&A W$ sFilePath = sPath; }~2LW" 1' sFileName = sName; 6e (Qwt this.nSplitter = nSpiltter; a@8v^G &)2i[X 60P<4 } zofa-7'Bn o\BOL3H Y1L[;)H n public String getSSiteURL() H[m:0eF'5 { czA5n return sSiteURL; a Ve'ry } lvdf^b/
j Ha(c'\T(\ dW_KU} public void setSSiteURL(String value) j
>Ht @Wi { D!@Ciw sSiteURL = value; -] LY,M } )(A]Ln4 q6@Lp^f gK_Ymq5>"M public String getSFilePath() $>G8_q { -O1>|y2rU return sFilePath; 6O|@xvg } VdPtPq1 F7
5#* 63^O|y\W8 public void setSFilePath(String value) 8H;t_B { -]L6= sFilePath = value; Ld\R:{M" } mkMq Bu#E9hJFvA %u? ># public String getSFileName() ;}7Rjl# { r/4``shg return sFileName; c*(bO3 b } X]'{(?Ch %;cddLQ\xY VAWF3 public void setSFileName(String value) ={_C&57N1 { 0bz'& sFileName = value; 2!0c4a^z } mi
ik%7>W (g EBOol F{Z~ R
public int getNSplitter() 5G::wuxk { YT8vP~ return nSplitter; .|hf\1_J } C+'/>=>a. mN~ci 0 Z('Z public void setNSplitter(int nCount) J3,fk) { |h- QP#]/ nSplitter = nCount; Vc_'hz]Z } MTsM]o } Y?S!8-z 6 2'j!"xv --PtZ]Z /* _
<WJ7 **Utility.java cFaaLUZk */ ?$vCW|f package NetFox; pczug-nB &7<TAo;O 1|RANy public class Utility { EwuO&q
*194{ ep @<&5J7fb public Utility() j2ve^F:Q { (mgS"zPS |y&*MTfV4L Z8zmHc"IH } ]or>?{4g cJN7bA{ //线程睡眠 s8wmCzB~ public static void sleep(int nSecond) 61.Brp.eP { J!0DR4=Xi try{ !6BW@GeF] Thread.sleep(nSecond); #i@;J]x( } ~R_ztD+C( catch(Exception e) 0TCBQ~ " { *i]=f6G e.printStackTrace (); 1xD=ffM>8N } WfWN(:dF } "^4_@ oo aEM %R<e //日志 s}j{#xT public static void log(String sMsg) A9f)tqbc { uxW~uEh System.err.println(sMsg); Q o?O:
} 4xk|F'6K uv=.2U46 }E0,z public static void log(int sMsg) {6"Ph(I1 { eAXc:222 System.err.println(sMsg); \n{qsf: } <Fi%iA } MNC*Glj= x$IX5:E#e ,8:(OB|a /* i
7_ _ **TestMethod.java ~;1l9^N| */ LO
< package NetFox; 7[I}*3Q' ;u;# g X}tVmO? public class TestMethod { "]z-: \ V O$IEn/%+ vg
D77 public TestMethod() 99}(~B { ///xx/weblogic60b2_win.exe jqv- D try{ b
/@#}Gc SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 0o+6Q8q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); A3|Dz&@: SiteFileFetch fileFetch = new SiteFileFetch(bean); '@p['#\uI fileFetch.start(); zoOaVV&1 } Fe]B&n catch(Exception e){e.printStackTrace ();} !'mq ?C= 0Uz\H0T1 ;k7xMZs } _h X]% Z0 o~+Ct$ h<Ft_#|o[ public static void main(String[] args) uM_# { Z7_m)@%;kk new TestMethod(); tcLnN: } Ytz)d/3T } `0P$#5? 点击下载更多相关资料
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