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/* 5k69F **SiteFileFetch.java (lb6]MtTHY */ {3hqp*xl package NetFox; 9C_*3?6 import java.io.*; \e<mSR import java.net.*; "2a$1Wmj( ]nUR;8 *4t-e0]j@w public class SiteFileFetch extends Thread { e
RA7i )s7bJjT0=X UP\C"\ SiteInfoBean siteInfoBean = null; //文件信息Bean a mqOxb long[] nStartPos; //开始位置 4otl_l(`yv long[] nEndPos; //结束位置 %y>+1hakkX FileSplitterFetch[] fileSplitterFetch; //子线程对象 ,eDD:#)$} long nFileLength; //文件长度 !\^jt%e& boolean bFirst = true; //是否第一次取文件 n@
4@, boolean bStop = false; //停止标志 +'|{1gB File tmpFile; //文件下载的临时信息 Z==!C=SBv DataOutputStream output; //输出到文件的输出流 KbAR_T1n pTWg
m\h //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) U;g S[8,p public SiteFileFetch(SiteInfoBean bean) throws IOException 2{-!E ^g { abBO93f^ siteInfoBean = bean; 'WQdr( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1 tPVP tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); bpW!iY/q3 if(tmpFile.exists ()) &|b4\uj9 { icE|.[ bFirst = false; Yt+h2ft! read_nPos(); `?|Rc } ;1 |x else D+sQP ymI { "(,2L,Zh nStartPos = new long[bean.getNSplitter()]; o)&"Rf nEndPos = new long[bean.getNSplitter()]; >7'+ye6z } BX[~%iE wiJRCH gO='A(Y U\jb" } X&a:g v^SsoX>WMH SO;N~D1Z6 public void run() jvHFFSK { X*F_<0RC1 //获得文件长度 m`y9Cuk //分割文件 *}cSE|S% //实例FileSplitterFetch F2;:vTA> //启动FileSplitterFetch线程 6Ps.E //等待子线程返回 r\2vl8X~ try{ =gjDCx$| if(bFirst) E!J=8C.: { $DebXxJw0l nFileLength = getFileSize(); gKo%(6{n~ if(nFileLength == -1) JoZ(_Jh%m { M;jcUX_{ System.err.println("File Length is not known!"); (ChD]PWQ } T\9~<"P^ else if(nFileLength == -2) UKtSm%\ { V`#.7uUP System.err.println("File is not access!"); W.I\J<=V } w0w1PE-V= else FhkkWWL { O_;Dk W for(int i=0;i<nStartPos.length;i++) IP3E9z_L { bsS:"/?> nStartPos = (long)(i*(nFileLength/nStartPos.length)); T2FE+ A]n9 } 6N~q`;p0 for(int i=0;i<nEndPos.length-1;i++) +=BAslk { t"vRc4mf nEndPos = nStartPos[i+1]; uO6{r v\ } =*Z5!W'd nEndPos[nEndPos.length-1] = nFileLength; S($Su7g%_ } }TB(7bbd; } i7*EbaYzUO Kibr ]w -WJ?:?' //启动子线程
4x;_AN fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .}B(&*9,v for(int i=0;i<nStartPos.length;i++) p{D4"Qn+P9 { ~" i0x fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), HKDID[d0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %NHkDa! nStartPos,nEndPos,i); BlA[ T% Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); QDx$==Fo fileSplitterFetch.start(); XH}'w9VynR } "Gb1K9A
im // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oczG|_ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9(4&KZpK // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {)8>jxQN nEndPos = " + nFileLength); _)T5lEFl= // fileSplitterFetch[nPos.length-1].start(); Z?5V4F:f g%[c<l9 LJ)5W //等待子线程结束 v59dh (:`Z //int count = 0; 6!'3oN{ //是否结束while循环 W2FD+ wt boolean breakWhile = false; ~*A8+@\R %a+mk
E ngohtB^] while(!bStop) !8NC# s { ^T"vX write_nPos(); ?']5dD Utility.sleep(500); !$-\;<bZw breakWhile = true; fk1ASV<rN Od4E x;F SCvVt for(int i=0;i<nStartPos.length;i++) (8.Z..PH { ?=m?jNa;nC if(!fileSplitterFetch.bDownOver) aT>'.*\ ] { F
*FwRj
breakWhile = false; 6f')6X'x break; y{dTp } $,+O9Et } ={K`4BD if(breakWhile) 35E _W>n break; ]QzGE8jp* sl]_M fFb_J`'ue //count++; h4q|lA6!k8 //if(count>4) S S2FTb-m // siteStop(); &boOtl^
} ,lZB96r0 |<:vY sCR67/ System.err.println("文件下载结束!"); v?KC% } 6d_'4B catch(Exception e){e.printStackTrace ();} $STaQ28C } $2W%2rZ %Ev4]}2C1 g!rQ4#4 //获得文件长度 bbrXgQ`s+w public long getFileSize() x>Zn?YR," { -r-k_6QP int nFileLength = -1; !o:f$6EA~C try{ &YF^j2 URL url = new URL(siteInfoBean.getSSiteURL()); e" St_z( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3AU;>D ^5 httpConnection.setRequestProperty("User-Agent","NetFox"); 9I6a"PGDb :]\([Q+a a!=D [Gz*5 int responseCode=httpConnection.getResponseCode(); z6*X%6,8 if(responseCode>=400) ,P;Pm68V { r>o63Q: processErrorCode(responseCode); $<}$DH_Y return -2; //-2 represent access is error vN`klDJgW[ } 03q5e LDPUD' MF5[lK9e String sHeader; G3Z)Z)N bbE!qk;hEP Dfmjw for(int i=1;;i++) h&KO<> { 37s0e;aF //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F(>Np2oi6 //Utility.log(in.readLine()); h1de[q) sHeader=httpConnection.getHeaderFieldKey(i); aAD^^l# if(sHeader!=null) .(K)?r-g5 { o~`/_+ if(sHeader.equals("Content-Length")) )Y"+,$$>Y` { VK m&iidU nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pR=@S>!| break; F1*>y } *\
R ]NV } c2l@6<Ww else vS;RJg= break; CsGx@\jN } i@*{27t } >*35C`^ catch(IOException e){e.printStackTrace ();} wW>A_{Y catch(Exception e){e.printStackTrace ();} ;U/&I3dzV OP[@k (C\]-E> Utility.log(nFileLength); ^aItoJq T(id^ w y0L_"e/ return nFileLength; Tp?7_}tRi } 9ijfRqI=x DX#Nf""Pw A8muQuj]~~ //保存下载信息(文件指针位置) "g5^_UP private void write_nPos() xQ7l~O
b { R@1 xt@? try{ R0KPZv- output = new DataOutputStream(new FileOutputStream(tmpFile)); <sb~ ^B output.writeInt(nStartPos.length); =W(Q34 for(int i=0;i<nStartPos.length;i++) kMIcK4.MH { G/)O@Ugp // output.writeLong(nPos); o_izl\ output.writeLong(fileSplitterFetch.nStartPos); Ua:}V n&! output.writeLong(fileSplitterFetch.nEndPos); 3Z>Ux3[ } rD*jp6Cl output.close(); Dj"F\j 1 } l!D}3jD catch(IOException e){e.printStackTrace ();} l{*@v=b( catch(Exception e){e.printStackTrace ();} 8I =2lK } `'DmDg lU8l}Ndz" 7`*h2 mgY //读取保存的下载信息(文件指针位置) R$R *'l private void read_nPos() Xr,1&"B&t { HY56"LZ$(} try{ X]ipI$'+C DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); R)c?`:iUB int nCount = input.readInt(); {i;r nStartPos = new long[nCount]; u+9hL4 nEndPos = new long[nCount]; \[;0KV_ for(int i=0;i<nStartPos.length;i++) xK>*yV { NDN7[7E nStartPos = input.readLong(); P0;n9>g nEndPos = input.readLong(); iDpSj!x/_ } ld[I}88$ input.close(); [*Z;\5&P } sU=H&D99 catch(IOException e){e.printStackTrace ();} ]_)yIi" catch(Exception e){e.printStackTrace ();} " s,1%Ltt } x`mG<Yt 1y:-N6 (^ JI%> private void processErrorCode(int nErrorCode) M`0V~P`^ { wi!?BCseq System.err.println("Error Code : " + nErrorCode); d9k0F
OR1 } R!HXhQ ?w$kue G?yLo 'Ulo //停止文件下载 `~cqAs}6]Q public void siteStop() 9[#pIPxNK { W<'m:dq bStop = true; b]e"1Y)D- for(int i=0;i<nStartPos.length;i++) L7l
FtX+b fileSplitterFetch.splitterStop(); t^&Cxh )L? P}$+ HVRZ[Y<^ } Ao 'l"- } BT !^~S%w //负责部分文件的抓取 <NMEGit **FileSplitterFetch.java _T60;ZI+^ */ 5=-Q4d package NetFox; juJklSD GblA9F7 hDDn,uzpd import java.io.*; /'SNw?& import java.net.*; }PlRx6r@ y
RqL9t YP oSRA L public class FileSplitterFetch extends Thread { i$Ul(? }{Pp]*I<A 4Z3su^XR String sURL; //File URL }CSDV9).S long nStartPos; //File Snippet Start Position 2DA]i5
long nEndPos; //File Snippet End Position `bq<$e int nThreadID; //Thread's ID MpT8" /.]A boolean bDownOver = false; //Downing is over +Ze}B*0 boolean bStop = false; //Stop identical ic:zsuEm FileAccessI fileAccessI = null; //File Access interface 2k~l$p>CN! E_rI?t^ VD*6g%p public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException aqZi:icFa { <_L,t 1H{ this.sURL = sURL; ]h`&&B qt this.nStartPos = nStart; |d2SIyUc this.nEndPos = nEnd; j^sg6.Z* nThreadID = id; J3V=
46Yc fileAccessI = new FileAccessI(sName,nStartPos);//定位 q>_.[+6 } Wu/]MBM 6GlJ>r+n mthA4sz public void run() ktXM|# { B3`5O[6 while(nStartPos < nEndPos && !bStop) #lo6c;*m5 { U+jOTq8 M 4\N;2N QO:!p5^: try{ VBlYvZ;$* URL url = new URL(sURL); nF]W,@u"h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h+H%?:FX httpConnection.setRequestProperty("User-Agent","NetFox"); DCO\c9 String sProperty = "bytes="+nStartPos+"-"; !PlEO 2at httpConnection.setRequestProperty("RANGE",sProperty); _yx>TE2e Utility.log(sProperty); (S5R!lpO D/gw .XYL r|8d
4 InputStream input = httpConnection.getInputStream(); QVT5}OzMt //logResponseHead(httpConnection); wU36sCo 7aRi5 fplo w byte[] b = new byte[1024]; s\(k<Ks int nRead; 1-uxC^u?|# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k"%~"9 { S3 %FHS nStartPos += fileAccessI.write(b,0,nRead); 4Z=_,#h4. //if(nThreadID == 1) M/'sl; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I]t!xA~ } qr^3R&z!} uAq~=)F>, eK=xrk Utility.log("Thread " + nThreadID + " is over!"); OZF
rtc+ bDownOver = true; Sv#XIMw{, //nPos = fileAccessI.write (b,0,nRead); X7MM2V } I*{nP)^9 catch(Exception e){e.printStackTrace ();} gCS<iBT(7 } 'F3f+YD } nNV'O(x} [ ({nj` 6<SAa#@ey //打印回应的头信息 }'V5/>m[ public void logResponseHead(HttpURLConnection con) <c-=3}=U\ { )[6U^j4 for(int i=1;;i++) iC32nY? { wk D^r(hiH String header=con.getHeaderFieldKey(i); h 8S. x) if(header!=null) hbDXo: //responseHeaders.put(header,httpConnection.getHeaderField(header)); (0r3/t?DQ Utility.log(header+" : "+con.getHeaderField(header)); K(rWNO else )p0^zv{ break; ItVWO:x&v } BwGfTua } #aJ(m& OA1uY83" W~;`WR;. public void splitterStop() @Zu5Vp J { 3?9IJ5p bStop = true; py!|\00} } `Bp.RXsd* M61xPq8y5 wLH>:yKUU } &*,#5. nZyX|SPk ->-KCd1b /* Y|f[bw **FileAccess.java W?R6ZAn *//文件访问(定位,写) gMmaK0uhS package NetFox; /GN<\_o=q import java.io.*; GL#u p Tod&&T'UW HGs $* public class FileAccessI implements Serializable{ 9G#n 0&wRJ :D6
ON"6 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 u(>^3PJ+ RandomAccessFile oSavedFile; jh%Eq+#S long nPos; KNvZm;Q6 kR-SE5`Jk { ]{/t-= public FileAccessI() throws IOException rdP[<Y9 { Ys!82M$g this("",0); D9=KXo^ } t ;;U} FEz-+X<q2 C=L>zOZ public FileAccessI(String sName,long nPos) throws IOException ghG**3xr { qFCOUl oSavedFile = new RandomAccessFile(sName,"rw"); %~H-)_d20 this.nPos = nPos; Q:G4Z9Kt oSavedFile.seek(nPos); +US!YU } +NZ_D#u RUnSC OdX TOB-aAO public synchronized int write(byte[] b,int nStart,int nLen) %+W{iu[| { _~l5u8{^ 6 int n = -1; QC
OM_$ y try{ ifMRryN4 oSavedFile.write(b,nStart,nLen); kzQ+j8.,U n = nLen; +s,=lL } zII|9y catch(IOException e) oi&VgnSk { jjRi*^d9 e.printStackTrace (); y*jp79G } YW,tCtI0_ %op**@4/t\ gZ3u=uME return n; abmYA# } >reU#j p?%y82E shy-Gu& } .nf#c.DI J9--tJ?[>o ^+>laOzC`8 /* W fN2bsx> **SiteInfoBean.java Uou1mZz/ */ XSwl Tg package NetFox; 7?!d^$B #_ ;lf1x! x/I%2F public class SiteInfoBean { 4<w.8rR:A {=9,n\85# `t>l:<@% private String sSiteURL; //Site's URL YlJ@XpKM private String sFilePath; //Saved File's Path Gi|w}j_ private String sFileName; //Saved File's Name +6M}O[LP private int nSplitter; //Count of Splited Downloading File 9rA0lqr]5 ^qvZXb Zgp4`)}: public SiteInfoBean() h9&0Z+zs {//nSplitter的缺省值为5 DZ3wCLQtK //default value of nSplitter is 5 e9Wa<i8 this("","","",5); hlvK5Z } t9GR69v:? P-9)38`5 c)6m$5] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Y!aSs3c { |#v7/$! sSiteURL= sURL; Y#ap* sFilePath = sPath; > ym,{EHK sFileName = sName; !]A this.nSplitter = nSpiltter; q<x/Hat) #X+JHl %vn"{3y>rF } j1Y~_ 6IN
e@ \S `:y?[Y public String getSSiteURL() yM6pd U]i { @(EAq<5{ return sSiteURL; v ,i%Q$ } G{As,`{ o)M}!MT NR$3%0 nC6 public void setSSiteURL(String value) (U DnsF { (R,#a *CV sSiteURL = value; RN1y^` } r8t}TU>C `z}?"BW| `$Y.Y5mGtJ public String getSFilePath() '0;l]/i. { ?>9/#Nv return sFilePath; zF`0J } M5LfRBO z#9aP&8 Q MVpGWTH@F public void setSFilePath(String value) !NK1MU?T) { dM.f]-g sFilePath = value; \{_q.;} } ~f2z]JLr: 3oj' ytxN Ve$o}h- public String getSFileName() ,C\i^>= { s2p\]|5 return sFileName; {S]}.7`l9( } nQZx=JK .D"m@~j7 |w~nVRb public void setSFileName(String value) '`[&}R { JJ-( Sl sFileName = value; P-_6wfg,;> } 0(}t8lc 5+0gR
&|j [-1^-bb public int getNSplitter() KJUH(]>F { tPWLg), return nSplitter; Ys9[5@7 } 4HXo >0 IxN9&xa ;3coP{ public void setNSplitter(int nCount) wD}l$& + { #6aW9GO nSplitter = nCount;
IZ-1c1
} yf.~XUk^ } sRR(`0Zp `,*3[ se2!N:|R!G /* e`_LEv **Utility.java ha<[bu e */ :as$4| package NetFox;
K=Z|/Kkh |Pax =oJ\M vkV0On public class Utility { F`W?II? nsC3 OX0%C.K)hZ public Utility() dh iuI|?@ { :gibfk]C 9wUkh}s N7zft } #$07:UJ h
0Q5-EA //线程睡眠 x.6:<y public static void sleep(int nSecond) !sP{gi#= { <oV(7 try{ ORw,)l Thread.sleep(nSecond); zT]8KA } BoWg0*5xb catch(Exception e) xwq
(N_ { nPl?K:( e.printStackTrace (); =z69e%. } BhGu!Y6f } '[:D$q; u'DRN,h+ //日志 s Y Qk public static void log(String sMsg) :U%W% { $k%2J9O System.err.println(sMsg); 'G4ICtHQ } \'D0'\:vz cp7=epho Hg izW public static void log(int sMsg) v>)"HL"XG { sIGMA$EK System.err.println(sMsg); K7:)nv
E } 3yF,ak{Sl } 9}<ile7^ d.d/< 06Sceq /* IueFx u **TestMethod.java v MH */ }rw8PZ9 package NetFox; x*U)Y [!#L6&:a8 )_S(UVI5 public class TestMethod { k"zv~`i' h2]P]@nW;W Yu^4VXp~M% public TestMethod() k2tF} { ///xx/weblogic60b2_win.exe }@q`%uzi try{ G@X% +$I SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9-a0 :bP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); C1n>M}b SiteFileFetch fileFetch = new SiteFileFetch(bean); xr Jg\to{i fileFetch.start(); CXMLt } LYK"( C catch(Exception e){e.printStackTrace ();} D.u{~ eJX9_6m- )'cMYC } G}raA% |3"KK \?k'4rH public static void main(String[] args) .g<DD)` { .|fHy new TestMethod(); "JV_ 2K_i } []1C$.5DD } `l[c_%Bm 点击下载更多相关资料
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