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/* z,nRw/o **SiteFileFetch.java 0;Y_@UVj */ A$RN7# package NetFox; A"V3g`dP import java.io.*; Ed|7E_v import java.net.*; q_8qowu" K<b -|t9f )gNHD?4x public class SiteFileFetch extends Thread { GYiUne$ Gb%PBg}HH S
~lw5 SiteInfoBean siteInfoBean = null; //文件信息Bean %@U<|9 %ua long[] nStartPos; //开始位置 KM|[:v long[] nEndPos; //结束位置 P%smX`v FileSplitterFetch[] fileSplitterFetch; //子线程对象 Mg95us long nFileLength; //文件长度 FuaGr0] boolean bFirst = true; //是否第一次取文件 :Ke~b_$Uy- boolean bStop = false; //停止标志 ^HKxaW9W File tmpFile; //文件下载的临时信息 uJG^>B?`b DataOutputStream output; //输出到文件的输出流 il-v>GJU7{ Z{RgpVt //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +D1;_DU public SiteFileFetch(SiteInfoBean bean) throws IOException *#EyfMz-B { tiwhG%?2 siteInfoBean = bean; #hzs,tvvD //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1K,bmb xRt tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); NF0} eom if(tmpFile.exists ()) FFtj5e { hGF:D#jyT bFirst = false; xYRL4 read_nPos(); ~@R=]l" } x&)P)H0vn else f&^K>Jt1@# { bM8b3,}?n nStartPos = new long[bean.getNSplitter()]; H"I|dK : nEndPos = new long[bean.getNSplitter()]; g<KBsz!{ } bQ0m=BzF (a`z:dz} n?aogdK$V 2hf]XV\ } Yk<?HNf [F+lVb )R{4"&&2 public void run() " S#0QH%5 { if:2sS9r //获得文件长度 WABq6q! //分割文件 "v jFL9 //实例FileSplitterFetch _V6;`{$WK //启动FileSplitterFetch线程 Vjj30f //等待子线程返回 |??uVA)\X try{ R$(,~~MH if(bFirst) :(A]Bm3 { 7Y@&& nFileLength = getFileSize(); sEe^:aSN if(nFileLength == -1) 2}I1z_dq~ { v8
ggPI System.err.println("File Length is not known!"); / $WEO[o } A#2Fd7& else if(nFileLength == -2) K-k;`s# { 6/s#'#jh System.err.println("File is not access!"); tQz-tQg } Sxjwqqv else (Pc:A!} { }#'O b for(int i=0;i<nStartPos.length;i++) Q>JJI:uC4 { 6BLw 4m=h nStartPos = (long)(i*(nFileLength/nStartPos.length)); fX#Em'Ab[ } #Cvjv;
QwY for(int i=0;i<nEndPos.length-1;i++) q%Obrk { *8,]fBUq nEndPos = nStartPos[i+1]; 8>6+]]O } d1``}naNw nEndPos[nEndPos.length-1] = nFileLength; yYp!s } *hAq]VC}) } vDv:3qN7( C:l
/% sR+=<u1 //启动子线程 t_x\&+W fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; j5G8IP_Wx for(int i=0;i<nStartPos.length;i++) -fT]}T6= { >q[ (UV fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vv"_u=H siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b,]h X nStartPos,nEndPos,i); !d&K,k Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yFH)PQ_ fileSplitterFetch.start(); |.)oV;9 } #fRhG^QKp // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sD_Z`1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &^{HD }/{b // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =UM30
P/ nEndPos = " + nFileLength); 5|9,S // fileSplitterFetch[nPos.length-1].start(); l~!\<, ! M`9qo8zCi O0i_h<T //等待子线程结束 @vCPX=c //int count = 0; T7'njaLec //是否结束while循环 m@u!frE, boolean breakWhile = false; fJH09:@^% 6
GO7[?U< xw&[ 9}Y while(!bStop) k>FMy#N|@ { *[wy-
fu write_nPos(); l|/h4BJ' Utility.sleep(500); &<_*yl p breakWhile = true; SWNi@ `kpX}cKK} (vB aem9 for(int i=0;i<nStartPos.length;i++) 1j`-lD { [V|,O'X ~ if(!fileSplitterFetch.bDownOver) cuO(*%Is1 { j#f+0 breakWhile = false; +?w 7Nm` break; m.iCGX } d(3F:dbk } me_DONW if(breakWhile) w9rwuk break; D^baXp8 L'BDS* 9%S{fd\# //count++; WS/^WxRY //if(count>4) GpMKOjVm| // siteStop(); 9c1g,:8\ } IL 'i7p %0fF_OU ZR.1SA0x?O System.err.println("文件下载结束!"); HJhPd#xCW } peCmb)>Sa catch(Exception e){e.printStackTrace ();} 9f+|m9~2 } EgOAEv MqGF~h|+ q#:,6HDd //获得文件长度 r(y1^S9!8 public long getFileSize() 'YIFHn$! { D9zw' RY int nFileLength = -1; dIQ7u try{ 9uV/G7Geq URL url = new URL(siteInfoBean.getSSiteURL()); ]sjYxe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q/m))!ikMt httpConnection.setRequestProperty("User-Agent","NetFox"); BIEc4k5( 3UU]w`At '(mJ*Eb int responseCode=httpConnection.getResponseCode(); IMIZ#/ if(responseCode>=400) S(9Xbw)T { ;ZHKTOoK processErrorCode(responseCode); h#'(i<5v
return -2; //-2 represent access is error 5!$m3j_,]? } ,Xs%Cg_Ig A ${b] 7Fw`s@/% String sHeader; !8yw!hA +Mc kR *Dtwr for(int i=1;;i++) ^"7tfo8 { >8_#L2@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5JW+&XA //Utility.log(in.readLine()); sP$bp Z} sHeader=httpConnection.getHeaderFieldKey(i); ["- pylhK if(sHeader!=null) [SgWUP* { A"x1MjuqLM if(sHeader.equals("Content-Length")) ZZOBMF7 { @P#uH5U nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); oJe9H < break; g
<^Y^~+E } yn<H^c } \?c0XD else JYL/p9K[I break; Oe4 l`
=2 } Y$b4Ga9j } UZ0fw@R M catch(IOException e){e.printStackTrace ();} ez=$ ]cln catch(Exception e){e.printStackTrace ();} Yr5A,-s [Av#Z)R s,m+q) Utility.log(nFileLength); i<(Xr E_zIg+(+ U"50_O return nFileLength; 5y?-fT]X } [b$4Shx 'FYJMIs {8I. `U //保存下载信息(文件指针位置) n6k9~ "? private void write_nPos() oP4GEr { 1nu^F,M try{ TXZv2P9 output = new DataOutputStream(new FileOutputStream(tmpFile)); )Jv[xY~ output.writeInt(nStartPos.length); |c`w'W?C6 for(int i=0;i<nStartPos.length;i++) ?:Bv
iF);/ { yZ!T8"mz{ // output.writeLong(nPos); K!KMQr` output.writeLong(fileSplitterFetch.nStartPos); 7h)iu9j output.writeLong(fileSplitterFetch.nEndPos); bz|
D-. } b
pv=% output.close(); "HXYNS> } VAXT{s&4> catch(IOException e){e.printStackTrace ();} pn*3\ catch(Exception e){e.printStackTrace ();} <`0h|m'U } l
(3bW1{n "gD-8C3 B*gdgM*` //读取保存的下载信息(文件指针位置) 8?FbtBAn private void read_nPos() ?^j^K-rx { tbO
H#| try{ rL5z]RY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); LF0sH)e] int nCount = input.readInt(); 6b!F 1 nStartPos = new long[nCount]; d9n?v)<v nEndPos = new long[nCount]; f}D1|\7 for(int i=0;i<nStartPos.length;i++) 5 Qoew9rA { ?,yj")+ nStartPos = input.readLong(); boo
}u nEndPos = input.readLong(); 21(p|`X } `|Or{ih input.close(); e]Zngt?b } *kIc9} catch(IOException e){e.printStackTrace ();} t&9A
]<n%, catch(Exception e){e.printStackTrace ();} A 8 vbQ } >s` J5I! &x >B Wpc|`e< private void processErrorCode(int nErrorCode) ujJI
1I { G/v/+oX System.err.println("Error Code : " + nErrorCode); Pm$q]A~ } YSaJeU>@ !p1qJ [ &[&r2>a //停止文件下载 R=Tqj,6 public void siteStop() [ 4;Ii { H}LS??P bStop = true; I=;+n- for(int i=0;i<nStartPos.length;i++) wKH ::! fileSplitterFetch.splitterStop(); .IJ_jt-^d -rKO
)} zm,@]!wI } oBUxKisW } V)P&Zw //负责部分文件的抓取 .%zy`n **FileSplitterFetch.java F,5r9^,_ */ #oJ5k8Wy package NetFox; F:#J:x' =YG _z^' `HuCT6O import java.io.*; +
S4fGT import java.net.*; *H[Iq!@ .`CZUKG z_
=Bt public class FileSplitterFetch extends Thread { ,&4qgp{) *UW=Mdt
8L*GE String sURL; //File URL {m`A!qcD| long nStartPos; //File Snippet Start Position MV=9!{` long nEndPos; //File Snippet End Position L^^4=ao0 int nThreadID; //Thread's ID gDIBnH boolean bDownOver = false; //Downing is over tb?YLxMV boolean bStop = false; //Stop identical S^Au#1e
FileAccessI fileAccessI = null; //File Access interface nv<` K9d 4'p=p#o )wVIb)`R>Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {J5JYdK { _owjTo} this.sURL = sURL; D=TL>T.bf this.nStartPos = nStart; +u'I0>)S this.nEndPos = nEnd; an2AX%u nThreadID = id; d4% `e&K]' fileAccessI = new FileAccessI(sName,nStartPos);//定位 b h*^{ } JxnuGkE0[# q;ZLaX\bFl }2h't.Z<u public void run() y&y/cML? { T0YDfo while(nStartPos < nEndPos && !bStop) "bPCOJ[v9 { 5St`@ ](_{,P Oy:QkV9 try{ Ri;=aZ5m URL url = new URL(sURL); epn#qeX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FOc|*>aKP httpConnection.setRequestProperty("User-Agent","NetFox"); |PI)A` String sProperty = "bytes="+nStartPos+"-"; (=`Z0)= httpConnection.setRequestProperty("RANGE",sProperty); Sf=F cb Utility.log(sProperty); oHOW5 6g}^Q?cpV# hHCzj*5 InputStream input = httpConnection.getInputStream(); Q,D0kS P //logResponseHead(httpConnection); ]7v81G5E |O57N'/ >6OCKl byte[] b = new byte[1024]; xLe
=d |6 int nRead; Ir!2^:]! while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4 #aqz9k { {d^Q7A:` nStartPos += fileAccessI.write(b,0,nRead); K2*1T+?X //if(nThreadID == 1) /%62X{=>; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CdDH1[J } 3\7'm] "!xvpsy O;UiYrXU Utility.log("Thread " + nThreadID + " is over!"); ]}p2Tp;1 bDownOver = true; a_Z.J3 //nPos = fileAccessI.write (b,0,nRead); anK[P'Y } cT_uJbP+ catch(Exception e){e.printStackTrace ();} m~##q}LZ } 03~+-h&n } >sn" mgo'MW\ F# jCEq //打印回应的头信息 chKF6n public void logResponseHead(HttpURLConnection con) FTbT9 { ^Vl^,@ for(int i=1;;i++) A,3@j@bdy { yQ<6p3 String header=con.getHeaderFieldKey(i); B1x'5S;Bq if(header!=null) sVE>=0TVP //responseHeaders.put(header,httpConnection.getHeaderField(header)); <+<)xwOQ ] Utility.log(header+" : "+con.getHeaderField(header)); ny278tr Q7 else Lv break; PXOrOK } -;sJ25( } 3js)niT9u g@$0FY{Q ^fA3<| public void splitterStop() +`Q
PBj^ { 4aj[5fhb- bStop = true; j'G"ZPw1 } 9c"0~7v `Mo~EHso. :`{9x%o; } zb@L)% /IGrp.} Q.j-C}a /* y&n1 Nj]^ **FileAccess.java 3c1o,2 *//文件访问(定位,写) #gxRTx package NetFox; F7k4C2r import java.io.*; $-C6pZN(X ?9o#%?6k (Q}PeKM?jq public class FileAccessI implements Serializable{ 5A0KV7N5 ==jkp
U*= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 t:?<0yfp& RandomAccessFile oSavedFile; v&t`5-e-A long nPos; '0\0SL tEi@p;Z> Up]VU9z public FileAccessI() throws IOException Z&~k]R0y { o'x_g^ Y this("",0); EG Q1li'B } !nP8ysB &* V0( ,Ut!u) public FileAccessI(String sName,long nPos) throws IOException ~NNaLl
{ sqq/b9 uL/ oSavedFile = new RandomAccessFile(sName,"rw"); /ieu)m:2 this.nPos = nPos; ~Mg8C9B?%3 oSavedFile.seek(nPos); u;l6sdo } fzGZ :L dK=D=5r, |Oj,S|Z: public synchronized int write(byte[] b,int nStart,int nLen) BDB zc5Q( { a$+e8> int n = -1; %k1q4qOG]^ try{ .@x"JI>; oSavedFile.write(b,nStart,nLen); Ggxrj'r n = nLen; ey9fbS ^I } e>)}_b catch(IOException e) R'1vjDuv { H|(*$!~e e.printStackTrace (); I'6ed`| } kBDe*K.V H)?" 8 s o/i5e=9[y return n; \fQgiX } eog,EP"a8Y sDh6 Uk 'nmYB:&! } ><Mbea=U+ ;M(ehX
ND99g /* !O%f)v? **SiteInfoBean.java JzS^9)& */ (cqA^.Td package NetFox; H$($l<G9C \`<s@U |'l* $ public class SiteInfoBean { N;Gf,pE A.'`FtV jAQ)3ON< private String sSiteURL; //Site's URL iM-hWhU private String sFilePath; //Saved File's Path {(zL"g46 private String sFileName; //Saved File's Name wxr}*Z:ZMa private int nSplitter; //Count of Splited Downloading File -%QEzu& oVj A$| S+\Mt+o public SiteInfoBean() \2LA%ZU {//nSplitter的缺省值为5 X|QX1dl //default value of nSplitter is 5 ? _h#> this("","","",5); tX2>a } U:\oGa84A & /FA> !C)> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^SL}wC x { ]V[ sSiteURL= sURL; (^OC%pc sFilePath = sPath; B2+_F"<; sFileName = sName; -B++V this.nSplitter = nSpiltter; E4fvYV_ra Yv`1ySR qm&53 } AXv3jH,HF f>JzG,- I>(z)"1 public String getSSiteURL() $F'~^2 { .dq.F#2B; return sSiteURL; UqQZ
A0e } orN2(:Ct7 S>zKD &I">{J< public void setSSiteURL(String value) _:z;j{@4 { Z-r0
D sSiteURL = value; 0~I)
/T } gQzF C&g (TK
cSVR 6(;[ov1 public String getSFilePath() P_}_D{G { X=RmCc$: return sFilePath; tbt9V2U:"n } P6Ol+SI#m ,DsT:8 Gl\RAmdc public void setSFilePath(String value) @!tmUme1c { H "/e% sFilePath = value; { l~T~3/i } ry=[:\Z~ 2yg'?tpj @o.i2iG public String getSFileName() ':fbf7EL< { KuAGy*:4T return sFileName; 8&AorYw[ } zL=I-f Vq H0:6zSsc=| NQ{Z public void setSFileName(String value) W8/6 { CHSD8D sFileName = value; y")>"8H } [<yUq zm %Y[/Ucdm
Rf$6}F
public int getNSplitter() *8HxJ+[,[ { sm <kb@g return nSplitter; 3m9E2R, } zTzG&B- MA QY/s~F U*l>8 public void setNSplitter(int nCount) 0To
5|r { v2<gkCK^ nSplitter = nCount; X'p%$HsMG } l"g%vS,;` } =hb87g. )O'<jwp$ >}tG^ )os /* -igZU>0B_ **Utility.java MH(g<4>* */ rkXSygb package NetFox; :jCaDhK WWzns[$f rI$10R$+H public class Utility { y$W3\`2q `2+52q<FO 0{uX2h public Utility() 1EzA@3:{ { :36^^Wm &?pAt30K: 7t/SZm } wN.Jyb LZ$!=vg4 //线程睡眠 WJ,ON-v public static void sleep(int nSecond) $9$NX/P { _3JTHf<+ try{ AX?6Q4Gq1 Thread.sleep(nSecond); yFv3>\ } *GnO&&m'B catch(Exception e) WVFy Zp B { G(e?]{( e.printStackTrace (); e70*y'1fu } /zAx`H } [Y+bW#' J]e&z5c //日志 B 8,{jwB public static void log(String sMsg) m\Nc}P_"p { rZ7 Ihof System.err.println(sMsg); 3Q;l*xu } zc5_;!t K>~l6 y+<HS]vyV public static void log(int sMsg)
C5?M/xj { Qmn5-yiw1d System.err.println(sMsg); sIe(;%[` } DO;
2)ZQ% } W@Wh@eSb; pDT6>2t [)?3Dp|MH /* R8)"M(u=l **TestMethod.java 9IMcp~zX */ mB`r6'#= package NetFox; FB`HwE< A>k;o0r
-fv.ByyA public class TestMethod { VdgPb ( R
_%pR_\ /zM7G?y public TestMethod() h9mR+ng*oD { ///xx/weblogic60b2_win.exe 6fiJ'
j@ try{ dLq!t@?iu> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); t+tGN\q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Z:{Z&HQC SiteFileFetch fileFetch = new SiteFileFetch(bean); ub&1L_K fileFetch.start(); Y|L57F } `N0E;=g catch(Exception e){e.printStackTrace ();}
/uWON4 O(VV-n7U |qD<h } KK}&4^q ~F-,Q_|- j!l(ReGb public static void main(String[] args) C/JFg-r { *MNY1+RJ new TestMethod(); >8##~ZuF+ } ME.LS2'n } ,3K?=e2 点击下载更多相关资料
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