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/* zG<<MR/< **SiteFileFetch.java h'};spv */ P{UV3ZA% package NetFox; ZIa,pON import java.io.*; D-LOjMe import java.net.*; I=#`8deH( z`t~N NJ.oM E@= public class SiteFileFetch extends Thread { >h\u[I$7 Lo_+W1+ #"KC29!Yj SiteInfoBean siteInfoBean = null; //文件信息Bean !hZ:
\&V long[] nStartPos; //开始位置 GW'v\O long[] nEndPos; //结束位置 +pme]V|< FileSplitterFetch[] fileSplitterFetch; //子线程对象 G\BZ^SwE long nFileLength; //文件长度 "r_wgl% boolean bFirst = true; //是否第一次取文件 J_Tz\bZ3) boolean bStop = false; //停止标志 w-e{_R File tmpFile; //文件下载的临时信息 AK,'KO%{= DataOutputStream output; //输出到文件的输出流 ~?Ky{jah:^ cjPXrDl{\ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6QY;t:/< public SiteFileFetch(SiteInfoBean bean) throws IOException P9'`
2c { K&%CeUa siteInfoBean = bean; ~qeFSU( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); tF}^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }}$@Tij19[ if(tmpFile.exists ()) Znb7OF^#" { PBb&.< bFirst = false; 9/29>K_ read_nPos(); .gDq+~r8O } \H:T)EVy else CA0XcLiFt { $ch`.$wx nStartPos = new long[bean.getNSplitter()]; hI!BX};+} nEndPos = new long[bean.getNSplitter()]; eNK
+)<PK( } .>F4s_6l =?.oH|&\h uStAZ~b\ O6G'!h\F }
t kj H(
i dREY m}1 public void run() 3r kcIVO { sd\p[MXX //获得文件长度 q/U-6A[0 //分割文件 jW`JThoq //实例FileSplitterFetch 4($"4>BA //启动FileSplitterFetch线程 n_km]~ //等待子线程返回 f;
|fS~ try{ zZCRej if(bFirst) xt5/`C { `T[@ - nFileLength = getFileSize(); R\3a Sx L if(nFileLength == -1) D;V[9E=g/ { NUltuM System.err.println("File Length is not known!"); dJ6fPB|k } 0,t%us/q else if(nFileLength == -2) X%5eZ"1{x { H/*ol^X7 System.err.println("File is not access!"); Tl2t\z+ps } )/::i
O&$: else j
%gd:-tA { +,>%Yb=EA for(int i=0;i<nStartPos.length;i++) F,p0OL. { lfcGi3 nStartPos = (long)(i*(nFileLength/nStartPos.length)); w7?fJ")
} $C\ETQ@ for(int i=0;i<nEndPos.length-1;i++) P+hcj
p* { ~/`/r%1/J nEndPos = nStartPos[i+1]; &su'znLV } TSP%5v;Dh nEndPos[nEndPos.length-1] = nFileLength; 0Xh_.PF } Xh;.T=/E| } VjM3M<!g>M hHE~/U h.>SVQzU //启动子线程 E:pk'G0bZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
:9UgERjra for(int i=0;i<nStartPos.length;i++) J/4T =:\ { %Gh5!e:$SI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6*9wGLE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), R}=5:)%w nStartPos,nEndPos,i); ?ZRF]\dP] Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8~o']B;lJ fileSplitterFetch.start(); :'Qiwf& } `sYFQ+D#O // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M@A3+v%K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); aDNB~CwZZ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ls
5iE nEndPos = " + nFileLength); uPz+*4+ // fileSplitterFetch[nPos.length-1].start(); U8Y%rFh1 Q[j| 2U !RmVb}m //等待子线程结束 j HHWq>=d //int count = 0; ]u_j6y! //是否结束while循环 rY_~(?XS boolean breakWhile = false; 9Lb96K?=> nTqU~'d' CjQO5 while(!bStop) [b3!H{b# { QF"7.~~2 write_nPos(); V^2_]VFj Utility.sleep(500); =#G
2}8mQD breakWhile = true; N*-tBz {q0+PzgP u<BU4c/p for(int i=0;i<nStartPos.length;i++) -&8( MT* { &R72$H9C8i if(!fileSplitterFetch.bDownOver) S:_Ms{S { YO7U}6wBt breakWhile = false; Lj1l]OD break; ;?2)[a } hC:'L9Y } 4qOzjEQ if(breakWhile) ~$HB}/ break; Y_'ERqQ n N<N~ t/iI!} //count++; b&z#ZY //if(count>4) lYx_8x2 // siteStop(); Zo3!Hs ZA } ;l@94)@0 uks75W!}U h:%,>I%{ System.err.println("文件下载结束!"); d/7fJ8y8 } MgJ6{xzz catch(Exception e){e.printStackTrace ();} cfLF@LW!]) } aDbqh~7 S>yi D`v
r6m^~Wq!} //获得文件长度 }e[ E public long getFileSize() ?,vLRq. { JmI%7bH@ int nFileLength = -1; O sgPNy0 try{ !Z!)$3bB URL url = new URL(siteInfoBean.getSSiteURL()); *d1BpR% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kt6x"'"1 httpConnection.setRequestProperty("User-Agent","NetFox"); rQjk
]at$ohS (g##wa)L int responseCode=httpConnection.getResponseCode(); a1cX+{W if(responseCode>=400) |`T(:ZKXZ2 { 7> Z| K processErrorCode(responseCode); ')uYI;h9 return -2; //-2 represent access is error &`D$w?beg } U zy@\ MKHnA|uQ]( \<LCp;- K String sHeader;
w$}q`k' #t+?eye~ :5t4KcQ for(int i=1;;i++) -/Q5?0z { pHeG{<^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F5o8@ Ib]: //Utility.log(in.readLine()); =L!&Z sHeader=httpConnection.getHeaderFieldKey(i); :R;w<Tbz" if(sHeader!=null) s6`E.Eevm { P3zUaN\c if(sHeader.equals("Content-Length")) RM2Ik_IH[l { ewMVUq*: nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); F]$ Nu break; 37U8< } ]>n{~4a } @ st>#]i4 else [?]N
GTr# break; 7H7
Xbi@ } 6$`< Y? } [EAOk=X catch(IOException e){e.printStackTrace ();}
0,Ds1y^ catch(Exception e){e.printStackTrace ();} bfxE}> 5nG\J
g7 MP%#)O6 Utility.log(nFileLength); xIM,0xM2 3q]0gU&?? /vQ)$;xf# return nFileLength; V}E['fzBFV } !nmZ"n|}p X|of87 <y6`8J7: //保存下载信息(文件指针位置) PQHztS" private void write_nPos() -)V0D,r$[ { ,1-%C) try{ Y+-yIMt$r output = new DataOutputStream(new FileOutputStream(tmpFile)); o|xf2k output.writeInt(nStartPos.length); S^QEc tXU for(int i=0;i<nStartPos.length;i++) q\fbrv%I4 { !sT>]e // output.writeLong(nPos); K9<8FSn output.writeLong(fileSplitterFetch.nStartPos); a5a
;Fp output.writeLong(fileSplitterFetch.nEndPos); r:QLU]
} ti5fsc output.close(); aBAoSn } %'2P4( catch(IOException e){e.printStackTrace ();} P;5)Net1X catch(Exception e){e.printStackTrace ();} }z]d] } UF9={fN1 A c_P^ -laH^<jm5 //读取保存的下载信息(文件指针位置) HhbBt'fH private void read_nPos() |_53So:g { )~'UJPK try{ uLdHE5vr DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5wK==hZ int nCount = input.readInt(); vl (``5{ nStartPos = new long[nCount]; 1g;2e##) nEndPos = new long[nCount]; }8O9WS for(int i=0;i<nStartPos.length;i++) }&v}S6T { L$ T2 bul nStartPos = input.readLong(); "aGmv9\ nEndPos = input.readLong(); rZUTBLZ`j } & 9e input.close(); 4
]oe`yx } x?i
wtZ@ catch(IOException e){e.printStackTrace ();} jFQ y[k-B catch(Exception e){e.printStackTrace ();} !'$*Z( } )<x9t@$ M"z=114 0:{W
t private void processErrorCode(int nErrorCode) Bc=(1ty) { M+t)#O4 System.err.println("Error Code : " + nErrorCode); xU;SRB } l+;S$evY <"Y>|X B>u`%Ry& //停止文件下载 8@3=SO public void siteStop() >?+Rtg|${ { i4YskhT bStop = true; h7]+#U]mi for(int i=0;i<nStartPos.length;i++) }s2CND fileSplitterFetch.splitterStop(); :(q4y-o6 W6?=9].gc J.iz%8 } N XB8u6 } Uw4iWcC //负责部分文件的抓取 BA
a:!p **FileSplitterFetch.java u>fs
yn9c */ 6*,55,y package NetFox; 4K cEJlK5 F=F84_+K shw?_#?1dy import java.io.*; ^!tX+`,6^ import java.net.*; T"\d,ug5[ N[@~q~v *)[fGxz
\ public class FileSplitterFetch extends Thread { Od.@G ~ +}jzge" /`cy4< String sURL; //File URL DN^+"_:TB long nStartPos; //File Snippet Start Position =p|IWn{P long nEndPos; //File Snippet End Position 3[#^$_96b int nThreadID; //Thread's ID PTHxvml boolean bDownOver = false; //Downing is over cc${[yj) boolean bStop = false; //Stop identical s}JifY` FileAccessI fileAccessI = null; //File Access interface 'v'[_(pq 6$"IeBRO u?>},M/ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException s:{[Y7\? { 9DBX.| this.sURL = sURL; >V.?XZ nt this.nStartPos = nStart; %:C6\4 this.nEndPos = nEnd; a;$V;3C{b& nThreadID = id; lLQcyi0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 tDETRjTA } @<DRFP
:%sG'_d oDS7do public void run() @+;.W>^h { #~Xj=M% while(nStartPos < nEndPos && !bStop) ]Mq-67 { H[w';u[% dpz@T>MS= FqyxvL. try{ ,{IDf URL url = new URL(sURL); (bm>
)U= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Dp['U httpConnection.setRequestProperty("User-Agent","NetFox"); Pjq'c+4.yL String sProperty = "bytes="+nStartPos+"-"; 9ad`q+kY httpConnection.setRequestProperty("RANGE",sProperty); R1JD{ Utility.log(sProperty); xS,F
DPA }^I36$\ T Tbe{nb InputStream input = httpConnection.getInputStream();
@Mg&T$ //logResponseHead(httpConnection); 54{E&QvL8o UR'v;V&Cb\ ;(mNjxA byte[] b = new byte[1024]; *v#V%_ o int nRead; RA a1^Qb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -75mgOj.# { <Hv/1:k} nStartPos += fileAccessI.write(b,0,nRead); b\^DQZmth //if(nThreadID == 1) RH,x);J| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tIn`L6b } CeU=A9 v$\<L| m p_7$#{l Utility.log("Thread " + nThreadID + " is over!"); a2?@OJ bDownOver = true; ;u`8pF!_eE //nPos = fileAccessI.write (b,0,nRead); !,$K;L } Bor_(eL^ catch(Exception e){e.printStackTrace ();} RaLV@>jPm } zw'%n+5m } V+D <626o it{Jd\/hR {'alA //打印回应的头信息 ftmPdha%+ public void logResponseHead(HttpURLConnection con) nh7_
jEX { UvMkL for(int i=1;;i++) _zbIS&4 { ,J 2qLH1 String header=con.getHeaderFieldKey(i); Q~.t8g/ if(header!=null) ~(*tcs]hY //responseHeaders.put(header,httpConnection.getHeaderField(header)); x+~!M:fAc9 Utility.log(header+" : "+con.getHeaderField(header)); P,zQl; else \ v+>qY<q break; T!?tyW } XR VZU~ZV } ?(zCv9Pg AP z"k?D0 tvno3" public void splitterStop() v?8i;[ { PcbhylKd bStop = true; +*Wlj8 } jD<xpD 6
o W.s8!KH: } F6J]T6Y .[eC w l(x0d /* Zs|Ga,T **FileAccess.java ]Vj($O: *//文件访问(定位,写) @=z.^I30 package NetFox; wIAH,3! import java.io.*; Fa`%MR1 Tei2[siA5 yQ^, >eh public class FileAccessI implements Serializable{ QiA}0q3]0 H9'psv //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 c?<)!9: RandomAccessFile oSavedFile; tKyGD|g S long nPos; s[eSPSFZ ho6hjhS|u QSzht$8 public FileAccessI() throws IOException 3st?6?7| { A*:|d~ this("",0); ,gpEXUp\ } 3H<%\SYp C(h<s
e? m<#^c?u public FileAccessI(String sName,long nPos) throws IOException atd;)o0*0 { ,j{tGj_ oSavedFile = new RandomAccessFile(sName,"rw"); ]7TOA$Q this.nPos = nPos; UsA fZg8 oSavedFile.seek(nPos); E ,ilJl\ } 5|jY a0k;way ]iW:YNvXA public synchronized int write(byte[] b,int nStart,int nLen) QoUdTIIL { ^B%ki int n = -1; 'y>Y */ try{ y:Gn58\o oSavedFile.write(b,nStart,nLen); ?Hdu=+ZV n = nLen; ) x+edYw } n(V{ [ catch(IOException e) aso8,mpZuA { nVoWER: e.printStackTrace (); _pb*kJ } %MGt3) 2[=3-1c 7l/ZRz}1 return n; p<\!{5: } &N= vs QEut@L NCT:!& } hP'4PLK yFeFI@Hp 3 {7DXSe4 /* a-S
tOO5s **SiteInfoBean.java IIT[^_g */ 6`6 / 2C$% package NetFox; NNr6~m)3v \}4*}Lr \ `z%5/@f; public class SiteInfoBean { 9MO=f^f- S,5>/'fy0 .9Cy<z private String sSiteURL; //Site's URL fwA8=oSZd private String sFilePath; //Saved File's Path L58#ri= private String sFileName; //Saved File's Name lw~
V private int nSplitter; //Count of Splited Downloading File Xm|~1 k_3 ){)-}M =Yl ea,S public SiteInfoBean() dR_6j} {//nSplitter的缺省值为5 (_@]- //default value of nSplitter is 5 -l_B;Sb:e this("","","",5); PW5)") z } Iw.!*0$ |cnps$fk~ 9.xRDk public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #C. { #Ff8_xhP 2 sSiteURL= sURL; }wp/,\_
> sFilePath = sPath; }ssja,; sFileName = sName; }6.@ this.nSplitter = nSpiltter; Ua:@,}; }.'rhR+ 2ry@<88 } 4'`P+p"A 0fvOA*UP S2\;\?]^~ public String getSSiteURL() ORF:~5[YS` { +ansN~3 return sSiteURL; =+mb@#="m } uJH[C> \X\f~CB |
?vm.zp public void setSSiteURL(String value) eC%Skw { Cy/VH"G= sSiteURL = value; eCsk\f` } U+>M@!= _4)z:?G5 &wY$G! P public String getSFilePath() RjvW*'2G { =9 )k:S( return sFilePath; ZQfPDH= } y9d"sqyh `#l3a (57!{[J public void setSFilePath(String value) o<3$|`S& { j-R*!i sFilePath = value; y2jw3R } 3TCRCz Ic_NQ<8 >l AtfN=' public String getSFileName()
6(-s@{ { of_y<dd[G return sFileName; KgkRs?'z } sfr+W-7kx M+VWAh#uD >L!c} Ku public void setSFileName(String value) _9 '_w& { v
;}s`P\" sFileName = value; EZ|v,1`e } 4LB8p7$|a3 ^5Lk}<utw n6WKk+ public int getNSplitter() 8aW El% { h
':ZF return nSplitter; EmcLW74 } !YjxCx 7CuZ7!>$ }kr?+)wB public void setNSplitter(int nCount) ;XawEG7" U { EI 35&7( nSplitter = nCount; V+lF|CZb5 } xIa7F$R 0 } UWKgf? _ Rb0I7~Z%'d 0] /* PgK7CG7G **Utility.java y-bUVw!Y */ ?hkOL$v<9} package NetFox; n8F5z|/ /o m++DxV RhHm[aN public class Utility { U3V5Jor# 1s.2z[B~ |SjRss:i+ public Utility() ;mk[! { )'U0n`= A/'po_'uy ]1<GZ` } 9/(jY$Ar 3)W zX //线程睡眠 ^r&)@R$V public static void sleep(int nSecond) mvZ#FF1,J { s<FBr, try{ }Rw ,4 Thread.sleep(nSecond); .M^[/! } I!S Eb catch(Exception e) !>`Fg>uy { JaRsm'SIk~ e.printStackTrace (); R03 Te gwA } DaQl ip } R);Hd1G qy3@>
1G //日志 rtj`FH??11 public static void log(String sMsg) \]u;NbC] { (*9.GyK System.err.println(sMsg); rR#Ditn^ } VWE>w|' ;[Mvk6^'R 9KXL6#h public static void log(int sMsg) 8XB[CbO { ^'V :T Y System.err.println(sMsg); rKrHd } f
5v&4 } ?@.v*'qR Jo\P,-\( h<Aq|* /* ai/|qYf **TestMethod.java _?I{>:!| */ (jc& Fk package NetFox; cg MF?;V sF{aG6u X@\W*
nq public class TestMethod { DpT9"?g7 g|>LT_ sCFxn public TestMethod() kUf i { ///xx/weblogic60b2_win.exe (aa2uctTn try{ {rUg,y{v SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); @x}"aJgl //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); kyJbV[o<# SiteFileFetch fileFetch = new SiteFileFetch(bean); "Wwu Ty| fileFetch.start(); p%3z*2,( } !ajBZ>Q catch(Exception e){e.printStackTrace ();} `5IrV&a |vI`u[P ?;ok9Y } G.rz6o; <e2l@@#oy lvO6&sF1 public static void main(String[] args) e7RgA1 { K*>%,mP$i new TestMethod(); VVas>/0qr } 5qb93E"C } 4E39]vb 点击下载更多相关资料
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