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/* J?4{#p **SiteFileFetch.java >Wg=
Tuef */ u ExLj6 package NetFox; T+8Yd(:hX import java.io.*; ,n|si# import java.net.*; <y 4(!z" `RTxc tZxx#v` public class SiteFileFetch extends Thread { -oD,F
$Rb Bz+oMN#XJ +sNS SiteInfoBean siteInfoBean = null; //文件信息Bean +/OSg. long[] nStartPos; //开始位置 whI{?NP long[] nEndPos; //结束位置 (qcFGM22U FileSplitterFetch[] fileSplitterFetch; //子线程对象 $C16}^ long nFileLength; //文件长度 OT#@\/> boolean bFirst = true; //是否第一次取文件 +)jUA]hJ/ boolean bStop = false; //停止标志 F)P:lvp<r File tmpFile; //文件下载的临时信息 QE]@xLz DataOutputStream output; //输出到文件的输出流 l;F"m+B!$ ZvY"yl?e //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,%i
Scr,z public SiteFileFetch(SiteInfoBean bean) throws IOException T2{e1 =Z7 { V:0IBbh)w siteInfoBean = bean; }_Bo:*9B-o //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7KtU\u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "+DA)K if(tmpFile.exists ()) /4{WT?j { ITPE2x bFirst = false; ?o<vmIge read_nPos(); z$ ^d_) } So5/n7 else 7o4E_ .* { O{ :{P5 nStartPos = new long[bean.getNSplitter()]; BRFsw`c nEndPos = new long[bean.getNSplitter()]; I=`? 4% } &9jJ\+:7 -:}vf? VPCI5mS_ ^}j~:EZb } b1xE;0uR Y;af|?U*6: KFM[caKeJO public void run() q4BXrEOw { &+9 ; //获得文件长度 &oL"AJU //分割文件 xvGYd,dlK //实例FileSplitterFetch z/Lb1ND8 //启动FileSplitterFetch线程 * :"*' //等待子线程返回 YznL+TD try{ _/[qBe if(bFirst) +|?a7qM { 3G// _f nFileLength = getFileSize(); mR}8} K]L
if(nFileLength == -1) )L<.;`g4x { @6UY4vq9 System.err.println("File Length is not known!"); %Z;RY5 } T!
}G51 else if(nFileLength == -2) /N0mF< P { +o+f\! System.err.println("File is not access!"); K#FD$,c~ } L1IF$eC else 1$Up7=Dr= { A-x^JC= for(int i=0;i<nStartPos.length;i++) 288mP]a(v_ { mF
gqM: nStartPos = (long)(i*(nFileLength/nStartPos.length)); CKw-HgXG } )\U:e:Z ae for(int i=0;i<nEndPos.length-1;i++) }0~$^J { /fQcrd7h nEndPos = nStartPos[i+1];
e]<Syrk } .+7n@Sc nEndPos[nEndPos.length-1] = nFileLength; d%EdvM|) } DLwlA!z } 'm0WPS/6E t/i*.>7 ?!ap@)9 //启动子线程 Ust +g4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5{ap for(int i=0;i<nStartPos.length;i++) SiNgV\('U { &zn|), fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h]zok}$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~XUUrg; nStartPos,nEndPos,i); rEr=Mi2 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %
:G78. fileSplitterFetch.start(); Ehy(;n)\ } TF%n1H-sF // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c((3 B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (JU8F-/9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (4Db%Iw nEndPos = " + nFileLength);
\^1^|a" // fileSplitterFetch[nPos.length-1].start(); nS#F*) oy[s])Tg M:O*_>KF //等待子线程结束 +5fB?0D; //int count = 0; df{?E): //是否结束while循环 n%r>W^2j boolean breakWhile = false; lG6&uMvo lB}?ey s.(.OXD& while(!bStop) y9}qB:[bR { W *0!Z:? write_nPos(); 4n#u?) Utility.sleep(500); H
Qj,0#J) breakWhile = true; m.P
F'_)/ ]n=z(2Z9lD ?`TQ!m6y for(int i=0;i<nStartPos.length;i++) II^Rp],> { ~U+<JC Z if(!fileSplitterFetch.bDownOver) h`Jc%6o { <mX5VGY9^ breakWhile = false; J
rK{MhO break; dC<%D'L* } h5{//0 y } >MJ%6A> if(breakWhile) hMupQDv/I break; {F_>cyR *b;)7lj0h Tw \@]fw //count++; HubG>] //if(count>4) tE>FL // siteStop(); I
N@ ~~ } UXZ3~/L5 O qX&+ .0nT*LF System.err.println("文件下载结束!"); `LH 9@Z{ } t:dvgRJt* catch(Exception e){e.printStackTrace ();} QAI=nrlp } [voc_o7AI S|d /?}C|e d%@0xsU1 //获得文件长度 VK4UhN2 public long getFileSize() l="(Hp%b { qY&(O`?m& int nFileLength = -1; [6@bsXiw try{ Sw$&E URL url = new URL(siteInfoBean.getSSiteURL()); [1~3\-Y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %B&O+~ httpConnection.setRequestProperty("User-Agent","NetFox"); 4FnePi~i DKo6lP` qV=O; int responseCode=httpConnection.getResponseCode(); H94_a e if(responseCode>=400) OL=X&Vaf< { 4JBfA, processErrorCode(responseCode); oe6Ex5h return -2; //-2 represent access is error /&?ei*z } {\?f|mmq gy1kb,MO )YCH>Za String sHeader; r<]^.]3zj Y&VypZ"G> ~+6#4<M.~ for(int i=1;;i++) C&q}&=3r { Uq=Rz8hLM //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &WCVdZK: //Utility.log(in.readLine()); b`wT*& sHeader=httpConnection.getHeaderFieldKey(i); 2!f'l'} if(sHeader!=null) bil>;&h { 0o6r3xc; if(sHeader.equals("Content-Length")) 5Bcmz'?! { `U?S 9m nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &xj40IZ break; 4YOLy\"S } WbFCj0 } <q MX,h2 else NVVAh5R break; u 'ng'j' } YC{7;=Pf } Q2|6W E catch(IOException e){e.printStackTrace ();} @8YuMD; catch(Exception e){e.printStackTrace ();} uPFbKSJj 48gpXcc@| VQ~eg wJL Utility.log(nFileLength); I%?M9y.u6 1_~'?'&^ 7Aw <: return nFileLength; PVKq&Q? } N}|1oQkjf PHsM)V+ NFU=PS$ //保存下载信息(文件指针位置) G4F~V't private void write_nPos() D-e^b'l { 4!glgEE* try{ z_C7=ga< output = new DataOutputStream(new FileOutputStream(tmpFile)); d76C]R5L output.writeInt(nStartPos.length); */]1?M@P) for(int i=0;i<nStartPos.length;i++) LQ$dT#z2A { aBF<it> // output.writeLong(nPos); OOsd*nX/ output.writeLong(fileSplitterFetch.nStartPos); 3e[k 9` output.writeLong(fileSplitterFetch.nEndPos); (_q&QI0{ } d{^K8T3 output.close(); d[(%5pw~zL } -mZ{.\9 catch(IOException e){e.printStackTrace ();} Erl@]P4 catch(Exception e){e.printStackTrace ();} or`"{wop } L'BzefU;04 :Ea]baM" Z${@;lgP //读取保存的下载信息(文件指针位置) B@3>_};Ct private void read_nPos() BW)t2kR& { zHj_q%A try{ KrECAc DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @0:mP int nCount = input.readInt(); M+Y^ A7 nStartPos = new long[nCount]; Z*5]qh2r8 nEndPos = new long[nCount]; z:$TW{%M for(int i=0;i<nStartPos.length;i++) P[cGCmM { YAF0I%PYU nStartPos = input.readLong(); V> eJ nEndPos = input.readLong(); E<_+Tc } !I8(Y input.close(); $r)nvf`\ } Y0OVzp9 b catch(IOException e){e.printStackTrace ();} !91<K{#A{ catch(Exception e){e.printStackTrace ();} ]_)=xF19 } HPWjNwM VM
ny>g&3
XN'X&J private void processErrorCode(int nErrorCode) qo;F]v*pkK { > cJX'U9 System.err.println("Error Code : " + nErrorCode); Sytx9`G 5 } I=`efc]T |}roR{gc| jd DcmR //停止文件下载 M8lR#2n| public void siteStop() Neb%D8/Kn { hta$k%2 bStop = true; +hvVoBCM* for(int i=0;i<nStartPos.length;i++) ?9H.JR2s% fileSplitterFetch.splitterStop(); ~Urj:l yYTiAvN [+y/qx79 }
o;:a6D`
} 7~q'3 N //负责部分文件的抓取 Z.0^:rVp~ **FileSplitterFetch.java >G+?X+9 */ *SZ*S%oS3 package NetFox; 6{I5 23g ZGOI8M]@ 7"
cgj# import java.io.*; RT2a:3f import java.net.*; dQFx]p3L $}7WJz: KH&xu,I public class FileSplitterFetch extends Thread { \oGZM0j D9&FCCiUE Ih95&HsdC String sURL; //File URL c~Hq.K$d long nStartPos; //File Snippet Start Position _zO,VL long nEndPos; //File Snippet End Position t
UW'E int nThreadID; //Thread's ID }%rz"kB boolean bDownOver = false; //Downing is over P8s'e_t boolean bStop = false; //Stop identical ^Sr`)vP FileAccessI fileAccessI = null; //File Access interface 0)qLW&
w !$+J7\&7p dDk<J;~jGJ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Lp/]iZ@ { \G*vY#] this.sURL = sURL; (sn|`k3I this.nStartPos = nStart; NC2PW+( this.nEndPos = nEnd; `ml;#n,* nThreadID = id; O@_)]z?jUc fileAccessI = new FileAccessI(sName,nStartPos);//定位 sOW-GWSE< } [H)p#x \9BIRY` A!
1> public void run() }g _#.>D+ { B)"WG7W E while(nStartPos < nEndPos && !bStop) ~c3CyOab { S*CRVs Kc\0-3 Z ziy~~J try{ W"WvkW>- URL url = new URL(sURL); )5X7|*LP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
n/UyMO3= httpConnection.setRequestProperty("User-Agent","NetFox"); BiHBu8< String sProperty = "bytes="+nStartPos+"-"; g;bkVq httpConnection.setRequestProperty("RANGE",sProperty); 4S.%y7d\ Utility.log(sProperty); NzRL(A6V BZx#@356N A\.M/)Qo InputStream input = httpConnection.getInputStream(); M ~!*PCd5 //logResponseHead(httpConnection); (F7!&] 8% J74nAC%J^ rYq8OZLi byte[] b = new byte[1024]; 4Kt?; y
; int nRead; QkzPzbF" while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `&>!a { YrgwR nStartPos += fileAccessI.write(b,0,nRead); O`mW, //if(nThreadID == 1) KFC zf_P! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yZ+o7?(2p } 5NeEDY2%# 'F[Q E9]* 7IZ(3B<87t Utility.log("Thread " + nThreadID + " is over!"); q^dI!93n| bDownOver = true; nS'0i&<{1 //nPos = fileAccessI.write (b,0,nRead); w];t ]q| } iygdX2 catch(Exception e){e.printStackTrace ();} 8'#%7+ "=! } ,)Z^b$H] } Mi'eViH 'J<KL#og 'L0 2lM //打印回应的头信息 <v[,A8Q public void logResponseHead(HttpURLConnection con) y)#Ib*? { :d!.E$S for(int i=1;;i++) J/wot,j^ { FAU^(]-5m String header=con.getHeaderFieldKey(i); ;Z.}~d6>! if(header!=null) F+L q //responseHeaders.put(header,httpConnection.getHeaderField(header)); g >-iBxml Utility.log(header+" : "+con.getHeaderField(header)); |vWx[=`o else z6FG^ break; Jp5~iC2d } S`X;2\: } X'[SCs T?7ZF+yo6 OjeM#s#N! public void splitterStop() JYKA@sZHe { [>?B`1;@ bStop = true; 'n.eCdj } 8 s:sMU:Q Gz~P
0Z^w} 0t*q5pAG". } %wvSD&oz /1tqTi l!q i:H<=1 /* "W:'cIw **FileAccess.java $o1Gxz *//文件访问(定位,写) 4 "wuqr|o package NetFox; 8<?60sj import java.io.*; "PJ@Q9n__ @ZK|k a*S4rq@ public class FileAccessI implements Serializable{ ZZFa<AK4 W/{HZ< :. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 +l&ZN\@0X RandomAccessFile oSavedFile; WZ"x\K-; long nPos; r#3_F=xL5 m]Z&
.,bA T6-e public FileAccessI() throws IOException YJXh|@LT { |' mgo this("",0); W)w@ju$Ko } o& $Fc8bH {Sd{|R_ [Fr.ik public FileAccessI(String sName,long nPos) throws IOException LYavth`@h { Eh0R0;l5> oSavedFile = new RandomAccessFile(sName,"rw"); *wyaBV?*K this.nPos = nPos; J0lTp / oSavedFile.seek(nPos); =JNoC01D } )UZ
's>O NBE)DL kUn55 l public synchronized int write(byte[] b,int nStart,int nLen) SH5GW3\h { xC!, v 0& int n = -1; +vBq,'k` try{ m/%sBw\rx oSavedFile.write(b,nStart,nLen); hU+sg~E n = nLen; j$A~3O<e" } =R?NOWrDY catch(IOException e) 4 K{4=uU { 3(}HD*{E[@ e.printStackTrace (); SG;]Vr } Nm:nSqc xAQ=oF
+ LYkW2h`JQ return n; *w59BO&M4 } z9YC9m)jK Y*B}^!k6 {Qg"1+hhM } TpuN[Y @B*?owba> \BbemCPAm /* "f(iQI **SiteInfoBean.java z';p275 */ D*DCMMp=0 package NetFox; !ZD[ $lt+ n4qj"xQ .& B_\* public class SiteInfoBean { %{5mkO&,2 FSIV\ u d1 D{wZ3g private String sSiteURL; //Site's URL 92bvmP*o4 private String sFilePath; //Saved File's Path 9eH(FB private String sFileName; //Saved File's Name 6|rqsk private int nSplitter; //Count of Splited Downloading File 2zh?]if b,$H!V* ,cYU public SiteInfoBean() ul>$vUbyf {//nSplitter的缺省值为5 G?8LYg!- //default value of nSplitter is 5 8@|+-)t this("","","",5); [&j!g } j#9p0[ ShxB!/s FG38) / public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %=S~[&8C { }rxFX sSiteURL= sURL; o2@8w[r sFilePath = sPath; O (<Wn- sFileName = sName; _}EGk4E this.nSplitter = nSpiltter; IE+$ET>t /J<?2T9G IO/2iSbW } ABSAle 88$G14aXEk 1K"``EvNB public String getSSiteURL() Ef;_im { ~ 61O return sSiteURL; ,[D,G } ^g$k4 =oV8!d%] c_)vWU public void setSSiteURL(String value) "gfy6m { 6,7Fl=< sSiteURL = value; /RT3r } ;m,lS_[c MP-A^QT Yi1_oe public String getSFilePath() @AvXBMq| { xYtY}?!" return sFilePath; {W62%>v } BBm.;=8@ ^ <fC gU& t7H2z}06=h public void setSFilePath(String value) cmmH)6c> { @f{yx\u/ sFilePath = value; R)?K+cJ% } ja$ e) [9u/x%f( KM*sLC# public String getSFileName() 4r\Sbh { KwlN return sFileName; ]0GOSh } aEW
Z*y 2[}^ zTtA 9TjAEeU public void setSFileName(String value) .Kv>*__-Q { c (O+s/
sFileName = value; {:$0j|zL1 } ..X efNbl ~Us1F=i_Q v(3nBZHv_! public int getNSplitter() yK+76\} I { =3?t%l;n return nSplitter; t48(, } i,NN" N'+d1 L[)+J2_< public void setNSplitter(int nCount) $NJ]2P9L { iOm~ nSplitter = nCount; ps[TiW{q; } 2-ev7: } c@1C| 8c\mm 0n L01R.3Z+ /* 5YUn{qtD **Utility.java #IDDKUE */ [3>l^Q|# package NetFox; 6|r`
k75. :
FF:{&d 'm# -)R! public class Utility { j
wlmWO6 ;TD<\1HJT= >V;JI;[ public Utility() lY[>}L*H8 { HNxJ`x~Z~ `9B xDp]I _tS<\zy@y } KOv
a r0 , d ?4"8_ //线程睡眠 %4Ylq|d public static void sleep(int nSecond) @Ytsb!! { k ~lj:7g~ try{ oJVpNE[3] Thread.sleep(nSecond); d}3<nz, } \K9XG/XIx catch(Exception e) Nc
F { PQ. xmg2 e.printStackTrace (); Hq8<g$ } zh2$U
dZ|M } TKvUBy yc8FEn!)& //日志 1 h|cr_ public static void log(String sMsg) E)o/C(g { %gSqc
}v* System.err.println(sMsg); + 1\1Z@\M } 4JKB6~Y Vj_(55WQ g3 6oEz~| public static void log(int sMsg) 8Y3c,p/gS> { ;Jr6 System.err.println(sMsg); eft-]c+*0 } {H#1wu^]O$ } YiB]}/ Qzw~\KY: {6^c3R[
/* C_dsYuQ5R **TestMethod.java ~;_]U[eOL */ GeWB"(t package NetFox; E)3B)(@&P PvBx<i}A cEnkt= public class TestMethod { P5* :r3> ZZA!Y9ia2 4%LG9hS public TestMethod() L7_(KC h { ///xx/weblogic60b2_win.exe 9*GwW&M%1_ try{ 5Qd |R SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5)'
_3r //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); x=Qy{eIe SiteFileFetch fileFetch = new SiteFileFetch(bean); \xkLI:*\ fileFetch.start(); V^QKn+/ } ( t#w@< catch(Exception e){e.printStackTrace ();} 9m0`;~! N(vzxx^ cR}}N F } i:Pg&474f ?{?mAbc 7'S/hV% public static void main(String[] args) W:O<9ZbQ_ { ~:b bV6YO new TestMethod(); DQP#h5O } 2!\y0*}K } >&TSz5Q 点击下载更多相关资料
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