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/* 3pSj kS|?> **SiteFileFetch.java Z\Z,,g+WL */ DtWx r package NetFox; r?p[3JJ;mG import java.io.*; EyY],W1 Y import java.net.*; _({@B`N} $W&:(& XE1$K_m public class SiteFileFetch extends Thread { vT c7an6fy YLOwQj' l4vTU= SiteInfoBean siteInfoBean = null; //文件信息Bean 4(=kE>n} long[] nStartPos; //开始位置 oQT2S>cm^ long[] nEndPos; //结束位置 E1 |<Pt FileSplitterFetch[] fileSplitterFetch; //子线程对象 "_< 9PM1t long nFileLength; //文件长度 8[zb{PRu boolean bFirst = true; //是否第一次取文件 cJDd0(tD! boolean bStop = false; //停止标志 M-J<n>hl File tmpFile; //文件下载的临时信息 sb^mLH] 3 DataOutputStream output; //输出到文件的输出流 ZyI$M 3{J F2;:vTA> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) eY,O@'"8` public SiteFileFetch(SiteInfoBean bean) throws IOException |0sPka/u16 { $.rzc]s siteInfoBean = bean; R,t$"bOd //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); S2K#[mDG tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %2"J:0j if(tmpFile.exists ()) |sIr?RL{C { c~imE% bFirst = false; PLA#!$c7q read_nPos(); _c2WqQ-05 } m\ S\3n else JoZ(_Jh%m { icgJ;Q 5 nStartPos = new long[bean.getNSplitter()]; D!F 2l_ nEndPos = new long[bean.getNSplitter()]; Bz /@c) } 1%~[rnQ j6S"UwJjp
q0&$7GH4 UKtSm%\ } y$b]7O <
Ek/8x HYCuK48F[_ public void run() 0[T,O,y { iWA|8$u4gm //获得文件长度 ; s|w{.<: //分割文件 eC! #CK //实例FileSplitterFetch 3mO;JXd //启动FileSplitterFetch线程 m$wlflt //等待子线程返回
9QwKakci try{ mwC=o5O if(bFirst) ''H"^oS { SeEw.;Xw nFileLength = getFileSize(); $q_R?Eay if(nFileLength == -1) %m&@o~+ { 0uvzxmN System.err.println("File Length is not known!"); f>polxB%N } Kj3?ve~ else if(nFileLength == -2) 'cBBt { $s-Y%gc System.err.println("File is not access!"); uw AwWgl } @1-F^G%p8 else z6*<V5<7 { 3jZ6kfj for(int i=0;i<nStartPos.length;i++) `P}9i@C { $}GTG'*. nStartPos = (long)(i*(nFileLength/nStartPos.length)); b2C`g]ibQ } M.q=p[ for(int i=0;i<nEndPos.length-1;i++) 2%B'3>a { -WJ?:?' nEndPos = nStartPos[i+1]; (MLwQiop } Y?d9l nEndPos[nEndPos.length-1] = nFileLength; hK|j6xf.o } x/
*-P
b-_ } \ZI'|Ad ;# uZhd ?D`T7KSe~D //启动子线程 ?6^|ZtB fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7zemr>sIh for(int i=0;i<nStartPos.length;i++) W-efv { UUc8*yU)
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?jx1R^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0Ua%DyJ nStartPos,nEndPos,i); >&:NFq- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )%d*3\Tsd fileSplitterFetch.start(); PG~$D]; } a<~77~"4wn // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eHiy,IN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 47K1$3P // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 9(4&KZpK nEndPos = " + nFileLength); R?o$Y6}5 // fileSplitterFetch[nPos.length-1].start(); nkfZiyx eW J`$"z *{
{b~$ //等待子线程结束 kM8{Cw //int count = 0; v\tEVhm //是否结束while循环 g%[c<l9 boolean breakWhile = false; #_93f
| 06q(aI^Ch@ -G7TEq) while(!bStop) s$D ^ >0 { 7*5Z
write_nPos(); Jg}K.1Hs Utility.sleep(500); BZ!v%4^9 breakWhile = true; ;!!n{l$r' (xHf4[[u h:Gu`+D>W for(int i=0;i<nStartPos.length;i++) z`UhB%-? { :a
->0 l if(!fileSplitterFetch.bDownOver) pi<TFe@eG { 2;a(8^n breakWhile = false; jRSUp
E8 break; +ZM)bbB } ="wzq+ U } y*pUlts< if(breakWhile) i.D3'l break; aI^/X{d nw>8GivO 9RN-suE[ //count++; (0YZZ93 //if(count>4) /='. 4v // siteStop(); InXn%9]p] } VXIP0p@ 2EZb
)&Q Y2o?gug System.err.println("文件下载结束!"); 3b' QLfU } m< _S_c catch(Exception e){e.printStackTrace ();} 3 @ak<9& } 'u4<BQVV[ ;s`sn$@
ks$JP6 //获得文件长度 pn.wud}R public long getFileSize() MjlP+; ! { $YN6<5R) int nFileLength = -1; $hivlI-7Ko try{ )OiT{-m URL url = new URL(siteInfoBean.getSSiteURL()); b2b^1{@h;v HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o(DOQ Gl httpConnection.setRequestProperty("User-Agent","NetFox"); h 3]wL.V S;$-''o?9 [<DZ*|+ int responseCode=httpConnection.getResponseCode(); KD`IX-r{s if(responseCode>=400) &l3iV88 { Oo"^%F~% processErrorCode(responseCode); KMI_zhyB return -2; //-2 represent access is error 0"CG7Vg,zh } .pvi!NnL- &?mD$Eo Tyvtmx M String sHeader; ,lZB96r0 ,Ax dCT _%5Ro6 for(int i=1;;i++) ]]Cb$$Td { )+:EJH~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); $5Xh,DOg //Utility.log(in.readLine()); C(00<~JC sHeader=httpConnection.getHeaderFieldKey(i); S30?VG9U0f if(sHeader!=null) $2W%2rZ { (p2K36,9m if(sHeader.equals("Content-Length")) :xtXQza"- { :yUEkm8 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); N5a*7EJv+ break; ?OkWe<:4 } sBr_a5QQ# } a)wJT`xu else ,%uo6% break; ee yHy"@ } "?V0$-DR } |&RU/ a catch(IOException e){e.printStackTrace ();} &YF^j2 catch(Exception e){e.printStackTrace ();} 1v71rf&w "rx-_uK* O^oWG&Y;v Utility.log(nFileLength); mV3cp rRqv O8h%3& V5UF3'3;} return nFileLength; ["h5!vj } ogyTO|V= Vh_P/C+ 9I}-[|`u //保存下载信息(文件指针位置) ,6-:VIHQ private void write_nPos() Wk)OkIFR { \O2Rhz try{ #"@|f output = new DataOutputStream(new FileOutputStream(tmpFile)); *MKO
I' output.writeInt(nStartPos.length); L7dd(^ for(int i=0;i<nStartPos.length;i++) o,_?^'@ { n*2UnKaJ // output.writeLong(nPos); JpXlBEio% output.writeLong(fileSplitterFetch.nStartPos); Xu%'Z".>: output.writeLong(fileSplitterFetch.nEndPos); MF5[lK9e } >m$1Xx4#GV output.close(); G3Z)Z)N } %J+E/ catch(IOException e){e.printStackTrace ();} KrQ1GepJ catch(Exception e){e.printStackTrace ();} #1OOU } e )d`pQ6 <g$~1fa '@_d(N1jTw //读取保存的下载信息(文件指针位置) |olA9mp|] private void read_nPos() nAv#?1cjz { aDU<wxnSvO try{ 37s0e;aF DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ,J+}rPe"sf int nCount = input.readInt(); 'uBu6G nStartPos = new long[nCount]; 4y|BOVl nEndPos = new long[nCount]; 'Gj3:-xqL for(int i=0;i<nStartPos.length;i++) 9Z4nAc { RoPRQCE nStartPos = input.readLong(); 3}}38A|4 nEndPos = input.readLong(); ~E17L]ete } 6 (]Dh;gC input.close(); e"|efE } LRL,m_gt catch(IOException e){e.printStackTrace ();} VK m&iidU catch(Exception e){e.printStackTrace ();} pFOx>u2`a } 0Tx6zO HiZ*+T.B Q'=x|K#xj private void processErrorCode(int nErrorCode) nT7%j{e=L { !|^|,"A) System.err.println("Error Code : " + nErrorCode); T&6l$1J } 8A##\j) eA2@Nkw~) %)1y AdG
8 //停止文件下载 -|$@-fY; public void siteStop() bCRV\myd` { ,E S0NA bStop = true; C5o#i*| for(int i=0;i<nStartPos.length;i++) Y]'Z7<U}*E fileSplitterFetch.splitterStop(); Va"0>KX *4\:8 ;U/&I3dzV } ]cHgleHQ } +r2+X:#~T //负责部分文件的抓取 q'T4w!V(V **FileSplitterFetch.java >mwlsL~X */ e"{{ TcNk package NetFox; Q /U2^ P3x8UR=fS gb[5&>(# import java.io.*; "L IF.) import java.net.*; 9ijfRqI=x 3lrT3a3vV W+I!q:p4H public class FileSplitterFetch extends Thread { em%4Ap Ni9/}bb <? q?Mn String sURL; //File URL ?WGA?J %2 long nStartPos; //File Snippet Start Position %~4M+r6T long nEndPos; //File Snippet End Position -_=nDH int nThreadID; //Thread's ID ,LHn90S boolean bDownOver = false; //Downing is over j'Fpjt"&= boolean bStop = false; //Stop identical <sb~ ^B FileAccessI fileAccessI = null; //File Access interface }bb;~ T<n Acez'@z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException $*^7iT4q_t { G/)O@Ugp this.sURL = sURL; '$i:
2mn, this.nStartPos = nStart; ?1~` *LE this.nEndPos = nEnd; 03$mYS_? nThreadID = id; R`NYEptJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 KLST\Ln: } ejSji-Qd ZF!h<h&, 9 P l public void run() Kn5~d(: { Wf+cDpK while(nStartPos < nEndPos && !bStop) `KZm0d{H { d[iQ`YW5 bV^rsJm wON!MhA; try{ /CrSu URL url = new URL(sURL); uy>q7C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p*XANGA httpConnection.setRequestProperty("User-Agent","NetFox"); {&&z-^ String sProperty = "bytes="+nStartPos+"-"; ?g_3 [Fk httpConnection.setRequestProperty("RANGE",sProperty); W: z6Koc0 Utility.log(sProperty); 'TTLo|@"- \j$&DCv G<L;4nA) InputStream input = httpConnection.getInputStream(); yuh * //logResponseHead(httpConnection); s:n6rG S\CCrje ?qb}?&1 byte[] b = new byte[1024]; aC]$k'71 int nRead; /2&c$9=1 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) LQ@"Xe]5 { ;YaQB#GK% nStartPos += fileAccessI.write(b,0,nRead); 'p^t^=dQ //if(nThreadID == 1) \[;0KV_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )*$lp'~7N } k$n|*kCh /J]5H jk;j2YNPw Utility.log("Thread " + nThreadID + " is over!"); 1.}d.t
bDownOver = true; A @i //nPos = fileAccessI.write (b,0,nRead); |Tv#4st } z<MsKD0Q catch(Exception e){e.printStackTrace ();} 9Gvd&U } [*Z;\5&P } lov!o:dJ (Lbbc+1m Na<pwC //打印回应的头信息 xB@ T|EP public void logResponseHead(HttpURLConnection con) " s,1%Ltt { GV1pn) 4 for(int i=1;;i++) esJ~;~[@(r { v&6-a* <Z String header=con.getHeaderFieldKey(i);
{y)=eX9 if(header!=null) !Z1@}`V&; //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0j^Kgx Utility.log(header+" : "+con.getHeaderField(header)); B`EJb71^Xy else Lc}LGq! break; 9=s<Ld } ko!)s } R!HXhQ lqy Qf$t y#`tgJ: public void splitterStop() qv-8)MSr { T; 4NRC bStop = true; P?%s
#I: } +5)nk} 9[#pIPxNK |NlO7aQ>2H } ~?l |
[ +V2F#fI/ \UA[ /* % 7hrk **FileAccess.java Kf3"Wf^q *//文件访问(定位,写) n3WlZ!$ package NetFox; aHD]k8m z import java.io.*; )L? P}$+ ,Co|-DYf} ldf\;Qk public class FileAccessI implements Serializable{ [DuttFX^x [z:!j$K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 &0d#Y]D4` RandomAccessFile oSavedFile; _T60;ZI+^ long nPos; 'B|JAi? 6%' QjwM_ u* eV@KK! public FileAccessI() throws IOException ibcRU y0% { 0S"mVZ*P this("",0); hDDn,uzpd } J4hL_iCQ fuW\bo3 6bg
;q(*7 public FileAccessI(String sName,long nPos) throws IOException { qk1_yP { 7g^]:3f! oSavedFile = new RandomAccessFile(sName,"rw"); XPc^Tq this.nPos = nPos; [NTzcSN. oSavedFile.seek(nPos); :
6jbt: } ,~U>'&M; x>K Or,f 1er
TldX public synchronized int write(byte[] b,int nStart,int nLen) G/E+L-N#` { KYm0@O>; int n = -1; p
T?}Kc try{ l$KA)xbI oSavedFile.write(b,nStart,nLen); <)Dj9' _J n = nLen; FaAC&F@u } MpT8" /.]A catch(IOException e) )$2QZ
qX { hgG9m[?K e.printStackTrace (); }FROB/ } r `=I '@v\{ l @?sRj&w return n; %uDi#x. } gT.sjd C[cbbp )_90UwWpj } zpn9,,~u ,>a&"V^k fgTg7 m /* qz_7%c]K[ **SiteInfoBean.java LBeF&sb6 */ 6q\bB package NetFox; Pm6pv;WK K-)]
1BG M)Z7k/=<P public class SiteInfoBean { zaIKdI'/e fUWG*o9 /xBb[44z8 private String sSiteURL; //Site's URL !/b>sN} private String sFilePath; //Saved File's Path n`_{9R private String sFileName; //Saved File's Name ,&A7iO private int nSplitter; //Count of Splited Downloading File dl)Y'DI mthA4sz n&4N[Qlv, public SiteInfoBean() CZwXTHe {//nSplitter的缺省值为5 XX TL.. //default value of nSplitter is 5 tU5zF.% this("","","",5); 'ZF{R3Xu } 4i;{!sT QE+g
j8 1ba~SHi public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) b~P`qj[ { {
'eC`04E sSiteURL= sURL; x;.Jw6g sFilePath = sPath; VBlYvZ;$* sFileName = sName; t.y2ff<[U this.nSplitter = nSpiltter; HVCe;eI ?=msH=N<l }0*@fO } L[fiU0^o 9<?M8_ oSKXt}sh public String getSSiteURL() EWhK0Vej= { 9rX&uP)j^# return sSiteURL; $99n&t$Y } @gEUm_#HTs D/gw .XYL .hb:s,0mP public void setSSiteURL(String value) G$"h&Xy1c { ?4} h&/ sSiteURL = value; xIW3={b 3 } 3ZPWze6 sE<V5`Z= 7aRi5 public String getSFilePath() u~:y\/Y6 { FX&~\kmV'j return sFilePath; &BLJT9Frx } 1-uxC^u?|# 76Cl\rV Ta0|+IYk< public void setSFilePath(String value) ,-LwtePJ0 { Rok7n1gW sFilePath = value; UgSB>V<? } Xl{P8L HRCT} | j`@eF/" public String getSFileName() 8'[7
)I= { -Cpl?Io`r5 return sFileName; eK=xrk } 49c:V, M)+H{5bt /Iy]DU8 public void setSFileName(String value) SM#]H-3 { !Pvf;rNI1T sFileName = value; VcYrK4 } gCS<iBT(7 DJ k/{Z: P )"m0Lu< public int getNSplitter() 2;`1h[,-^ { 10~k2{Z return nSplitter; /9*B)m" } $9#H04.x (`>+zT5aH z,
)6"/; public void setNSplitter(int nCount) 7kLz[N6Ll { CyFrb`% nSplitter = nCount; (Z q/ } jD]~ AwRJ } N^G
Mp,8 J?1 uKR ::lKL /* wu!59pL **Utility.java a2O75 kWnm */ bHYy }weZ package NetFox; X/!o\yyT @f~RdO3 85$m[+md public class Utility { dr}`H,X"3 x,+{9 |bHelD| public Utility() .t-4o<7 3 { TDKki(o=~ 6Q@j
G@\1E+Ip } $y &E(J ".V$~n( //线程睡眠 k68T`Ub\W6 public static void sleep(int nSecond) K`WywH3- { Wx}8T[A} try{ ;(/ZO%h Thread.sleep(nSecond); u;"TTN } &K.d'$q catch(Exception e) ]L $\
# { 3?9IJ5p e.printStackTrace (); YeL#jtC } J.b9F:&} } t;Sb/ 3 NjScc%@y //日志 e7Z32P0ls public static void log(String sMsg) Q7\w+ANf0 { $\BE&4g System.err.println(sMsg); S>6~lb8G } L|:`^M+^w .-c4wm} [Cz-i public static void log(int sMsg) Y@vTaE^w3 { Nq[uoaT System.err.println(sMsg); a=9:[ } @7]yl&LZ } oy=js - 1\~ "VF*{ ?
7n`A >T /* x b~yM%*c **TestMethod.java cWsNr'MS* */ vhW2PzHFRi package NetFox; Tod&&T'UW O)*+="Rg BC#C9|n public class TestMethod { xp)sBM7A T{.pM4Hd XbKYiy public TestMethod() r&JgLC( { ///xx/weblogic60b2_win.exe 4y?n
[/M/ try{ u(>^3PJ+ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); M*, -zGr //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !qh]6%l SiteFileFetch fileFetch = new SiteFileFetch(bean); ,{u
yG: fileFetch.start(); '(f* 2eE: } 8,4"uuI catch(Exception e){e.printStackTrace ();} #ym'AN >V?eog%~ -`kW&I0 } i Dp)FQ$ eK?MKe t7Iv?5]N public static void main(String[] args) HZC"nb}r4 { v6bGjVK[ new TestMethod(); uK"=i8rs4 } !Vn\u } ghG**3xr 点击下载更多相关资料
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