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/* FSU<Y1|XM **SiteFileFetch.java ~Eq \DK */ .jU Z package NetFox; "<*awWNI import java.io.*; -u|l}}bh import java.net.*; -l
"U"U"F .|uLt J 5@ foxI public class SiteFileFetch extends Thread { :M j_2 ^Gq5ig1rxy 8%[HYgd5) SiteInfoBean siteInfoBean = null; //文件信息Bean B;!f<"a8 long[] nStartPos; //开始位置 +yWR#[`n long[] nEndPos; //结束位置 cn%2OP:L^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 Sj)}qM-y# long nFileLength; //文件长度 [Uli>/%JB boolean bFirst = true; //是否第一次取文件 b{RqwV5P boolean bStop = false; //停止标志 fYBH)E File tmpFile; //文件下载的临时信息 YUscz!rM DataOutputStream output; //输出到文件的输出流 2zK"*7b?
55-D\n< //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9cQ_mgch public SiteFileFetch(SiteInfoBean bean) throws IOException G;TsMq { $}R$t- siteInfoBean = bean; :
,p||_G& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); bC~~5Cm tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Q2/.6O8 if(tmpFile.exists ()) JDv-O&] { ?+r!z bFirst = false; $b>}C= gt read_nPos(); -#?<05/C> } qzK("d else xQu
eE{ { /APcL5:= nStartPos = new long[bean.getNSplitter()]; aI(>]sWJ nEndPos = new long[bean.getNSplitter()]; Z^zbWFO]5 } ?} ( = =x0No*#|' aqMc6N`z t)N;'v & } j$x)pB3] 5)'P'kVi7. o2=A0ogz? public void run() K=6UK%y
A { =MLf[ //获得文件长度 XoR>H4xh //分割文件 +y&d;0! //实例FileSplitterFetch dB;3.<S= //启动FileSplitterFetch线程 "&lN\&: //等待子线程返回 Z0ReWrl;` try{ )ofm_R'q* if(bFirst) #tjmWGo, { *
OsU Y=; nFileLength = getFileSize(); o>c^aRZ{ if(nFileLength == -1) #SkX@sl@ { 8g*hvPc System.err.println("File Length is not known!"); ^Y04qeRd } Ht[{ryTxu else if(nFileLength == -2) :?CQuEv- { ?_q+&)4-o System.err.println("File is not access!"); 9<s4yZF@x } ~]WVG@- else ,P6=~q3k { -2i\G .,J for(int i=0;i<nStartPos.length;i++) V5"HwN+` { dqe7s Zl! nStartPos = (long)(i*(nFileLength/nStartPos.length)); X=~V6m } b |7ja_ for(int i=0;i<nEndPos.length-1;i++) Y )b@0' { ZPO|<uR nEndPos = nStartPos[i+1]; 7*s8ttX } 8)xt(~qF nEndPos[nEndPos.length-1] = nFileLength; ~rv})4h } feEMg } 0^~\COa 1S$h<RIPAc 8o-bd_ //启动子线程 Yck~xt&] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; q\$6F)ha3 for(int i=0;i<nStartPos.length;i++) cxP6-tV% { K:5eek fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), u&]vd / siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N[U9d}Zv nStartPos,nEndPos,i); >dQ K.CG Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8#LJ* o fileSplitterFetch.start(); SH8/0g? } ^Jx$t/t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XnUO*v^] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $'"8QOnJ?k // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~]uZy=P? 5 nEndPos = " + nFileLength); D>sYPrf // fileSplitterFetch[nPos.length-1].start(); V"RpH, vtxvS3
|L:Cn J //等待子线程结束 zAScRg$:? //int count = 0; oq;'eM1,. //是否结束while循环 YaY8 `M{ boolean breakWhile = false; @Doyt{|T .T.5TMiOSq $.K?N@(W while(!bStop) Cg!^S(U4 { H:S,\D?%2x write_nPos(); <@,$hso7: Utility.sleep(500); HGDVOJq breakWhile = true; P $>` ?tYpc_p# UAYd?r for(int i=0;i<nStartPos.length;i++) rwqv V^ { Jb(Y,LO^ if(!fileSplitterFetch.bDownOver) sR_xe}- { {'bip`U. breakWhile = false; ?Zcj}e.r break; \pY^^ l* } -50AX1h31: } |3eGz%Sd if(breakWhile) jO'|mGUM break; ~OFvu}] ;")A{tX2 Y=B3q8l5 //count++; [}o~PN:sT( //if(count>4) H[Weu // siteStop(); g-)mav } cT'w= fCUT[d +H Yx)o:#2 System.err.println("文件下载结束!"); I6w~H?ul@* } B)=~8wsI:Z catch(Exception e){e.printStackTrace ();} >Da~Q WW| } M##';x0 e!x6bR9EZ uJow7-FD //获得文件长度 m],Ud\ public long getFileSize() \54}T4R { YD[H int nFileLength = -1; pSAR/':eg try{ xJ(:m<z URL url = new URL(siteInfoBean.getSSiteURL()); aXR%;]<Dw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); t[C1z httpConnection.setRequestProperty("User-Agent","NetFox"); d'HOpJE d53 L65[
4%ZM:/ int responseCode=httpConnection.getResponseCode(); y?z\L if(responseCode>=400) \0*l,i1& { XGs^rIf processErrorCode(responseCode); oXY Moi return -2; //-2 represent access is error
6rDfQ`f\p } 6Wf^0ok t#b0H)
.p@N:)W6 String sHeader; <,8l *1C :jem~6i 4A.Q21s for(int i=1;;i++) (GU9p>2 { lAASV{s{ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %w"nDu2Gcv //Utility.log(in.readLine()); )ly
^Ox sHeader=httpConnection.getHeaderFieldKey(i); g`,AaWlF if(sHeader!=null) ;Ss$2V'a { >1|g5 if(sHeader.equals("Content-Length")) -q>^ALf|@> { fEnQE EU~P nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); nkY@_N break; !,&yyx. } I4e+$bU3 } ^^?q$1k6r* else l},NcPL` break; vK$^y^ } ;5S}~+j } (.X]F_*sc catch(IOException e){e.printStackTrace ();} zICI_*~ catch(Exception e){e.printStackTrace ();} 8k!6b\Imz *i%quMv Jh@_9/? Utility.log(nFileLength); tS?lB05TOR 5vOC CW }STYG` return nFileLength; ST',4Oph5 } $&{IKP)u *y7 $xa4 Y94MI1O5$ //保存下载信息(文件指针位置) H%i>L?J2 / private void write_nPos() x0+glQrNN { LI
W*4r! try{ iS: #o> output = new DataOutputStream(new FileOutputStream(tmpFile)); Faac]5u:* output.writeInt(nStartPos.length); "QY1.:o<( for(int i=0;i<nStartPos.length;i++) 9]yW_]P { [_!O<z_sB // output.writeLong(nPos); E`D%PEps+ output.writeLong(fileSplitterFetch.nStartPos); b`~wGe output.writeLong(fileSplitterFetch.nEndPos); u<Xog$esu } H~fdbR output.close(); FjKq%.=# } (xT*LF+ catch(IOException e){e.printStackTrace ();} - r#K#v3 catch(Exception e){e.printStackTrace ();} :L$4*8@`+ } ujzW|HW^v D3]BTkMMS; HD-Erop //读取保存的下载信息(文件指针位置) XD%wj private void read_nPos() 46XN3r { Z85|I.mr try{ La,QB3K/ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <y=ovkM3 int nCount = input.readInt(); ?d-70pm nStartPos = new long[nCount]; JLm
@Ag nEndPos = new long[nCount]; "4 k-dj for(int i=0;i<nStartPos.length;i++) 0i@:KYP { ><Z'D nStartPos = input.readLong(); %_f;G+fK\p nEndPos = input.readLong(); .9M.| } U[8{_h<# input.close(); Ijo(^v@ } 5K.+CO< catch(IOException e){e.printStackTrace ();} ;u!?QSvb
catch(Exception e){e.printStackTrace ();} )"u:ytK{ } V2 `>
]/| n9oR)&:o "JhimgwvY private void processErrorCode(int nErrorCode) F!g;A"?V { dHII.=lT System.err.println("Error Code : " + nErrorCode); ycpE=fso' } l4T:d^Eb Q,e*#oK3$ WZ~> BM //停止文件下载 fI:H8 public void siteStop() b9("DZW; { Ps>&"k$T bStop = true; kC$I2[ t! for(int i=0;i<nStartPos.length;i++) O|z%DkH[ fileSplitterFetch.splitterStop(); '}{?AUDx km 5E)_] u{C)qb5Pu } ~@9zil41 } >FFVY{F //负责部分文件的抓取 3H8Al **FileSplitterFetch.java )%j" */ /lH'hcXcX package NetFox; pj|X]4?wdI ;}4k{{K d"&3Q_2CD import java.io.*; uMiyq< import java.net.*; A3yi?y{[* X47!E
|* rc{o?U'^- public class FileSplitterFetch extends Thread { !$>G#+y 8hB.fau 80&D"" String sURL; //File URL " $)yB long nStartPos; //File Snippet Start Position !J^tg2M8: long nEndPos; //File Snippet End Position *cNk>y int nThreadID; //Thread's ID W"qL-KW boolean bDownOver = false; //Downing is over O
E|+R4M boolean bStop = false; //Stop identical KH}t:m+h FileAccessI fileAccessI = null; //File Access interface uPDaq ]A VS`Z_Xn UR:n5V4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ScJu_Af { [W(Y3yyY this.sURL = sURL; fPz=KoN this.nStartPos = nStart; ` :5,e/5, this.nEndPos = nEnd; Vy;_GfT$ nThreadID = id; 4#2 ,Y! fileAccessI = new FileAccessI(sName,nStartPos);//定位 t9D
S]Li } C*pLq5s SIv[9G6 <}2A=~
_ public void run() 5$^c@ 0 { gb-tNhJa@b while(nStartPos < nEndPos && !bStop) X;]3$\F { }td6fj_{ fsI`DjKi) .@K#U52 try{ i./Y w URL url = new URL(sURL); D_ ug-<QT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); UK:M:9 httpConnection.setRequestProperty("User-Agent","NetFox"); 0w}{(P; String sProperty = "bytes="+nStartPos+"-"; ]h8/M7k httpConnection.setRequestProperty("RANGE",sProperty); l ?/gWD^ Utility.log(sProperty); jt%WPkY: "1%*'B^}bw U_Y;fSl> InputStream input = httpConnection.getInputStream(); n/-N;'2J //logResponseHead(httpConnection); {6tx,; r(F W-XN4:,qI 8A_TIyh? byte[] b = new byte[1024]; llqDT-cp int nRead; V"g~q?@F while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R `Q?J[e { u'Pn(A@1R nStartPos += fileAccessI.write(b,0,nRead); _z%\'(l+ //if(nThreadID == 1) )$F6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MM*-i= } z1qUz7 05 g?jV my=~"bw4 Utility.log("Thread " + nThreadID + " is over!"); -faw: bDownOver = true; ~ i'C/[P //nPos = fileAccessI.write (b,0,nRead); .-%oDuB5zF } ]>*I) H)
catch(Exception e){e.printStackTrace ();} d#Wn[h$" } ;]u1~ } _<Vg[-:1 b)y<.pS\ {4)5]62>u //打印回应的头信息 oHRbAE^ public void logResponseHead(HttpURLConnection con) qKx59 { Oo$%Yh51~ for(int i=1;;i++) +}Auk|>Dc { bY&YSlO String header=con.getHeaderFieldKey(i); 6(sfpK' if(header!=null) ugRV5bUk //responseHeaders.put(header,httpConnection.getHeaderField(header)); KZ
@l/s Utility.log(header+" : "+con.getHeaderField(header)); [$H( CH` else M'vXyb%$1 break; LA>dkPB } A1 b6Zt } X)Ocn`| ~Gwas0eNa rcW#6VZ= public void splitterStop() .Btv}b { G dL4|xv bStop = true; 3XBp6` } GMt)}Hz 7TR'zW2W ZS|Z98 } /$<JCNGv +Hi{/{k0N +*Q9.LjV /* [)bz6\d[ **FileAccess.java oRV]p *//文件访问(定位,写) ?n73J wH package NetFox; a6OrE*x:D import java.io.*; 7dsnv)(v ws na5D6i
>DkN+S public class FileAccessI implements Serializable{ |)*m[_1 YD dLDE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 JO]`LF] RandomAccessFile oSavedFile; :v''"+\ long nPos; )lE3GDAPgZ j(UX
6lR m|(I} |kT3 public FileAccessI() throws IOException vl>_e { |UABar b this("",0); av7q>NEZ!1 } Vl&+/-V he_HVRpB d#RF0,Y 9 public FileAccessI(String sName,long nPos) throws IOException 38OIFT { a [0N,t oSavedFile = new RandomAccessFile(sName,"rw"); \>w@=bq26 this.nPos = nPos; EgkZ$ah oSavedFile.seek(nPos); s}z(|IrH } ;e`D#khB #wq;^)> 3T Yo public synchronized int write(byte[] b,int nStart,int nLen) xuw//F { <x.]OZgO int n = -1; EXv\FUzo try{ _+0uju?o} oSavedFile.write(b,nStart,nLen); eimA *0Cq n = nLen; pqRO[XEp2 } v GulM<YY catch(IOException e) VGkW3Nt0 { Xd90n>4S e.printStackTrace (); l;"ub^AH } pIM*c6 uKaf{=* 7H/!rx return n; rHA/
} v3iDh8.__ (UbR%A|v; _.oRVYK/ } &h_d|8 9}? 5p]% UEx(~> /* \1eKY^)2 **SiteInfoBean.java L|dab{9 */ WW,r9D:/ package NetFox; \" 5F;J !nZI? z ; a3DoLq"/ public class SiteInfoBean { W]C_oh LRfFn^FPM /It.>1~2@ private String sSiteURL; //Site's URL N6-2*ES private String sFilePath; //Saved File's Path Ae,2Xi private String sFileName; //Saved File's Name ?];~N5<' private int nSplitter; //Count of Splited Downloading File $j$\ccG P:bVcta9g o3(|FN public SiteInfoBean() A3<P li {//nSplitter的缺省值为5 n57c^/A* //default value of nSplitter is 5 ^ mQ;CMV this("","","",5);
4#'^\5 } 6c;?`C 'T#<OR A[wxa public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) noB}p4 { K!$\REs sSiteURL= sURL; y.TdWnXx sFilePath = sPath; 3P<Zzt%e T sFileName = sName; ^*4(JR
this.nSplitter = nSpiltter; 7J)a "d^e Nys'4kx7 &T|UAM. } tCF0Ah ).O\O)K 0t/z" public String getSSiteURL() H/ B^N,oi { CC]@`R5 return sSiteURL; Is#v6:#^ } U:T5o]P< 9\W5 &].1[&M] public void setSSiteURL(String value) ]#WX|0''^ { qjdahVY sSiteURL = value; Yg:74; . } }f0^9( !:!@dC%8_ ~O7cUsAi' public String getSFilePath() da7x 1n$D { 6:7:NI l: return sFilePath; h&^/, G } )H=[NB6J8 'f$?/5@@ [W7\c;Do public void setSFilePath(String value) h<z/LL8| { LTlC}3c28f sFilePath = value; RQ$o'U9A } -`ys pE0? rym\5
`) L_CEY public String getSFileName() 3YZ3fhpw { /:c,v- return sFileName; E6KBpQcd[ } MHzsxF| D9pxe qf+= DIcyXZH< public void setSFileName(String value) *U[Q =w { p|O-I&Xd sFileName = value; !h~#L"z } VIlQzM;%^ 2l}FgD 4s+J-l public int getNSplitter() /hj9Q! { KE|u}M@v6 return nSplitter; Z+pvdu } JKu6+V jO 9zGKQ |X) myo~Qqt? public void setNSplitter(int nCount) 4m g
7f^[+ { 36Fa9P FCc nSplitter = nCount; T_|fb)G+{ } <45dy5!Tz } 2K7:gd8Ru aN);P> ]oZ,{Q5~ /* CSg5i&A= **Utility.java m{=~|I */ :!it7vZ package NetFox; +^% &8< 1'._SMP *Uw# public class Utility { 5]O LV1Xt zdQu%q =v#A&IPA' public Utility() J$=b&$I( { l8
2uK"M V%KW[v<G< Gpp}Jpj } 22(]x}` ~a0} //线程睡眠 d'@H@ public static void sleep(int nSecond) #(wzl { #Ew
eG^!# try{ ?+JxQlVDt- Thread.sleep(nSecond); EO!cv,[a } Js2_&?}3f catch(Exception e) ~}9H<K3V { KV&_^xSoh| e.printStackTrace (); v lnUN } $;j6*,H } LYo7?rp oDiv9jm //日志 lNp:2P public static void log(String sMsg) kQiW 5 { ^=M(K '' System.err.println(sMsg); \(7# N<-
} g&(~MD2{ c3 ]^f6)? dZ81\jdYv public static void log(int sMsg) hI#M {cz { 5^qp& System.err.println(sMsg); ^
cd5Zl } \\pyu]z } (Y@|h%1W f(ec/0W F$.s6Hh. /* ENF@6] **TestMethod.java 6!L*q */ )o(F*v package NetFox; |N3CoB g,]5&C T3v -VT?/=Y
s public class TestMethod { zpQ/E jc.Uh9Kc s 17gi,"X public TestMethod() Dve5m= { ///xx/weblogic60b2_win.exe I6Q_A try{ R$,iDv.jI SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); c15^<6]g //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5|={1Lp24g SiteFileFetch fileFetch = new SiteFileFetch(bean); 9 7qS.Z27 fileFetch.start(); 'cc4Y~0s } +}Wo=R} catch(Exception e){e.printStackTrace ();} yXQ;LQ; nU#q@p)Xg Qvg"5_26v } "TNUw&ih . T>}O0L" J]YN2{(x public static void main(String[] args) PSw+E'; { <Q~7a
hF new TestMethod(); xa^HU~ } q`K-T_< } ?{Z0g+B1 点击下载更多相关资料
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