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/* h?M'7Lti **SiteFileFetch.java \["1N-q b */ fte!Ll' package NetFox; X*D5y8< import java.io.*; Z.Lx^h+U import java.net.*; WcQZFtW =t <:zLe Vz+=ZK r5 public class SiteFileFetch extends Thread { =D;UMSf ]*t*/j;N E$oA+n~ SiteInfoBean siteInfoBean = null; //文件信息Bean R;N>#_9HU long[] nStartPos; //开始位置 *&~sr long[] nEndPos; //结束位置 Bil;@,Z# FileSplitterFetch[] fileSplitterFetch; //子线程对象 M]pel\{M long nFileLength; //文件长度 A_8`YN"Xk boolean bFirst = true; //是否第一次取文件 `RL(N4H boolean bStop = false; //停止标志 $/-wgyP3m+ File tmpFile; //文件下载的临时信息 gDjd{+LUo DataOutputStream output; //输出到文件的输出流 f^>lObvd UwzE'#Q- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) X_EC:GU public SiteFileFetch(SiteInfoBean bean) throws IOException vs)HbQ { g@N=N siteInfoBean = bean; <'+R%6 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); fM
zAf3 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P,LXZ if(tmpFile.exists ()) I NFzX { V9);kD bFirst = false; "J0Oa? read_nPos(); l)2HHu< } kKI!B`j=
else 6='_+{
{ z;Gbqr?{{ nStartPos = new long[bean.getNSplitter()]; 7m@^=w nEndPos = new long[bean.getNSplitter()]; zrWq!F*-V\ } K{7S )x5$io
"m\UqQGX 3IRRFIiO } cC(ubUR FK/ro91L 9x
6ca public void run() 1Tts3O. { U_=wL //获得文件长度 n=Z[w5 //分割文件 GurE7J^= //实例FileSplitterFetch 5i
wikC=y //启动FileSplitterFetch线程 cWy*K4O //等待子线程返回 71.:p,Z@z try{ <o"D/<XnB3 if(bFirst) kAKqW7,q" { ,nuDoc nFileLength = getFileSize(); .\hib.n3 if(nFileLength == -1) PxCl]~v { M,v@G$pW System.err.println("File Length is not known!"); 4<K ,w{I } LMhY"/hAXa else if(nFileLength == -2) j#.-MfB { D ;T r System.err.println("File is not access!"); FZ'>LZ } l%)=s~6z else yvH#1F`{q { IQ27FV|3 for(int i=0;i<nStartPos.length;i++) QP-<$P;~ { -EX3'
[*' nStartPos = (long)(i*(nFileLength/nStartPos.length)); =.=.
\K } \]d*h]Hms for(int i=0;i<nEndPos.length-1;i++) 8b#Yd
{ <LA`PbQa nEndPos = nStartPos[i+1]; h-v&I> } w[$Wpae nEndPos[nEndPos.length-1] = nFileLength; ![."xHVeL } ZJJl944 } ,uD*FSp> G5e Ls 7>e~i, //启动子线程 Y=wP3q fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Vp0GmZ for(int i=0;i<nStartPos.length;i++) S.)8& { -QNMB4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c75vAKZ2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3YNkT"~T nStartPos,nEndPos,i); Up2\X#6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \gW\Sa ^ fileSplitterFetch.start(); /;(%Xd&: } zR/p}Wu|! // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MZ+IorZl siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); SO jDtZ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HjY-b*B nEndPos = " + nFileLength); 7g<`wLAH // fileSplitterFetch[nPos.length-1].start(); {XUfxNDf J?=Ob?+
_ pQ2)M8 gf //等待子线程结束 XU })3]/ //int count = 0; @p'v.;~# //是否结束while循环 \?ws0Ax boolean breakWhile = false; X52jqXjg 4lKbw4[a Gw\HL while(!bStop) r.G/f{=<@ { KD3To% write_nPos(); a0j.\g Utility.sleep(500); dfkTDG+ breakWhile = true; {q>4:lsS b2@x(5# e~~k}2~ for(int i=0;i<nStartPos.length;i++) _e@qv;* { F'_8pD7 if(!fileSplitterFetch.bDownOver) <rI$"=7 { z=h5 breakWhile = false; a} fS2He break; }Knq9cf } (uxQBy } =y(YMWGS if(breakWhile) _ G*x:< break; 3g
"xm TF3q?0 }8]uZ)[p= //count++; 5J#gJFA //if(count>4) nv[Sb%/ // siteStop(); ,* vnt6C* } s3RyLT '\mZ7.Jj 9}Ave:X^ System.err.println("文件下载结束!"); {3uSg) } "RX5] eJc\ catch(Exception e){e.printStackTrace ();} iOXP\:mPo } $ u.T1v |g^W @.P s!!t //获得文件长度 eii7pbc public long getFileSize() m%(JRh { PC7.+;1 int nFileLength = -1; )Ua2x@j'C@ try{ z4+6k-#): URL url = new URL(siteInfoBean.getSSiteURL()); 9wJmX<Rm HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v@s`l# httpConnection.setRequestProperty("User-Agent","NetFox"); ;{7lc9uRj s(9rBDoY(8 y#0Z[[I0 int responseCode=httpConnection.getResponseCode(); d_qVk4h\ if(responseCode>=400) ;xH'%W9z { c,%>7U(w_ processErrorCode(responseCode); G[-jZ return -2; //-2 represent access is error f?^xh } Xz@;`>8i tf79Gb> nt`l6b String sHeader; RSeezP6# qNVw+U;2P uvM88# for(int i=1;;i++) )Bvu[rUy { >A "aOV>K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LVtQ^ 5>8 //Utility.log(in.readLine()); o%4+I> sHeader=httpConnection.getHeaderFieldKey(i); ul&7hHp_u% if(sHeader!=null) htSk2N/ { #_|^C(]! if(sHeader.equals("Content-Length")) HON[{Oq { 54j
$A nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); .7rsbZzs break; GV[BpH } | N,nt@~ } HliY else =gyK*F(RK break; 5h7DVr! } 7+-}8&syu } Rp9iX~A`e catch(IOException e){e.printStackTrace ();} S60`'!y catch(Exception e){e.printStackTrace ();} sgsMlZ3/ <W^~Y31:0 KePHn:c Utility.log(nFileLength); 0].5[Jo 'Em($A( Di=6.gm[< return nFileLength; O]!DNN } DcDGrRuh 5X-{|r3q !]T|=yw //保存下载信息(文件指针位置) '(>N
gd[ private void write_nPos() ?`}U|]c { t\0JNi$2 try{ m_f^#: output = new DataOutputStream(new FileOutputStream(tmpFile)); t!N>0]:mo output.writeInt(nStartPos.length); 39eoL;O_ for(int i=0;i<nStartPos.length;i++) ^i7a2<
z { `Yve
// output.writeLong(nPos); 4D$E output.writeLong(fileSplitterFetch.nStartPos); Q+N @j]' output.writeLong(fileSplitterFetch.nEndPos); Y" |U$ } w$HC! output.close(); w]XBq~KO } IrM3Uh catch(IOException e){e.printStackTrace ();} kS!*kk*a catch(Exception e){e.printStackTrace ();} % m$Mnx } zg"ZXZ 5%/%i}e~( ArMe[t0$ //读取保存的下载信息(文件指针位置) GMI>$$< private void read_nPos() a$A
S?`L { $6Psq=| try{ i:To8kdO DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); `Y9@ ?s Q int nCount = input.readInt(); b,`N;* nStartPos = new long[nCount]; Wc[)mYOSuO nEndPos = new long[nCount]; AU2Nmf?]% for(int i=0;i<nStartPos.length;i++) ibL;99 # { T]k@g_ nStartPos = input.readLong(); r|8..Ll nEndPos = input.readLong(); ``D-pnKK } tzPe*|m< input.close(); Hqv(X=6E0 } i^Q^F catch(IOException e){e.printStackTrace ();} cl5 :|) catch(Exception e){e.printStackTrace ();} <L0_<T } C^'}{K 3]A'C& KxI(#}5o& private void processErrorCode(int nErrorCode) SY.V_O$l} { 5O*$#C;c System.err.println("Error Code : " + nErrorCode); nAOId90wue } g}7%3D QG
ia( #4?3OU# //停止文件下载 \WEC1+@ public void siteStop() MI 3_<[ { &nn": bStop = true; $TiAJ}: for(int i=0;i<nStartPos.length;i++) ,P]{*uqGiB fileSplitterFetch.splitterStop(); lC{m;V2 Wit1WI;18 Pc-HQU } C_o.d~xm } ektFk"W3A\ //负责部分文件的抓取 r\?*?sL **FileSplitterFetch.java iuRXeiG8 */ UlR7_ package NetFox; 2t%)d9r32 Gl(,%~F9i 420K fVA import java.io.*; +=v|kd import java.net.*; A2 rRYzN; v?J2cL l!2.)F` x public class FileSplitterFetch extends Thread { $on liW| 3/D fsv )U?W+0[= String sURL; //File URL ~ i,my31 long nStartPos; //File Snippet Start Position [iz long nEndPos; //File Snippet End Position TzjZGs W[V int nThreadID; //Thread's ID l1msXBC boolean bDownOver = false; //Downing is over Fwtwf{9I boolean bStop = false; //Stop identical ~Km8-b(& FileAccessI fileAccessI = null; //File Access interface $vd._j& `1d r$U [dUEe@P public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Mmn[ol { ) PtaX|U this.sURL = sURL; +4 dHaj6 this.nStartPos = nStart; e3.TGv7= this.nEndPos = nEnd; ;6Z?O_zp4 nThreadID = id; SJfsFi?n fileAccessI = new FileAccessI(sName,nStartPos);//定位 -M:.D3,L } Wp ]u0w 5 m:nh<)# ?hO*~w;UU| public void run() pa7fTd
{ Hmz[pTQ|87 while(nStartPos < nEndPos && !bStop) *Z(qk`e.b { ^gy(~u 8EQ;+V |2Dlw]d try{ mdwY48b URL url = new URL(sURL); ck;owGlT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3N-(`[m{E httpConnection.setRequestProperty("User-Agent","NetFox"); 6
J#C String sProperty = "bytes="+nStartPos+"-"; yq2Bz7P httpConnection.setRequestProperty("RANGE",sProperty); Nt)9-\T Utility.log(sProperty); D6D*RTi4 9Rpj&0Is m@ ~HHwj InputStream input = httpConnection.getInputStream(); /*[a>B4-q //logResponseHead(httpConnection); V6c?aZ,O #RcmO** q?6Zu:': byte[] b = new byte[1024]; /dO&r'!: int nRead; drH!?0Dpg while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) }I]9I
_S { ][.1b@)qV nStartPos += fileAccessI.write(b,0,nRead); 3 Xy>kG} //if(nThreadID == 1) @{j-B
IRZ0 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?r/7: } lD(d9GVm{z X6PfOep j \SDw Utility.log("Thread " + nThreadID + " is over!"); W[b/.u5z: bDownOver = true; 2-
)Ml* //nPos = fileAccessI.write (b,0,nRead); l{k } 'lWNU catch(Exception e){e.printStackTrace ();} nV'B!q } R1U\ / } iS{)Tll}& 1oC/W?l^ 0-QkRr_I //打印回应的头信息 79&Mc,69 public void logResponseHead(HttpURLConnection con) YO=;)RA { KxvT}"k for(int i=1;;i++) +_+_`q>] { ym:JtI69 String header=con.getHeaderFieldKey(i); 4;_.|!LN if(header!=null) r`lgK2r\ //responseHeaders.put(header,httpConnection.getHeaderField(header)); sbgRl% Utility.log(header+" : "+con.getHeaderField(header)); ;qvZ * else b{(:'. break; Q.nEY6B_ } CnO$xE|{ } xx%WIY:} r+>9O 1~j.jv$ public void splitterStop() 3p7*UVR" { thOCzGJ$ bStop = true; p@P[pzxI } X,~8) W 4}gwMjU-B Odagaca } am`eist: J9/w_,,R$ f}*Xz.[bCp /* E_$ST3 **FileAccess.java %e_WO,R *//文件访问(定位,写) U9Y'eP.2 package NetFox; u+{5c5_ import java.io.*; r,F'Jd5 (33[N l.C{Ar public class FileAccessI implements Serializable{ ]t<%v_K /+'@}u
| //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 -5.>9+W8I RandomAccessFile oSavedFile; j&8U:Q, long nPos; MEg|AhP 9~a_^m/ ~]N%
{;F} public FileAccessI() throws IOException 2PRGwK/ { ctj.rC)6n this("",0); j+ s8V-7( } u6I# D
_ 7 0KZXgBy_ rsrv1A=t? public FileAccessI(String sName,long nPos) throws IOException .3$iOMCH { N#|c2n+ oSavedFile = new RandomAccessFile(sName,"rw"); /bg8oB4 this.nPos = nPos; brZ3T`p+.P oSavedFile.seek(nPos); wp$SO^?- } H.'_NCF&;L Lc+)#9*d iTD{ public synchronized int write(byte[] b,int nStart,int nLen) =PXNg!B}D* { N$p O] p int n = -1; 9n$$D; try{ I4u'b?*
je oSavedFile.write(b,nStart,nLen); |U12fuQ n = nLen; |`#[jHd } Ie` `Wb= catch(IOException e) p_tMl%K { P^+Og_$ e.printStackTrace (); *,mbZE=< } u{8Wu; tw^V?4[Miu 5JQq?e)n return n; cpf8f i } ~ 5`Ngpp 3"%:S_[ 60-LpGhvy } *_U
z**M QD7>S(p uI.4zbgl[ /* C!v0*^i **SiteInfoBean.java `4XfT.9GT */ k5W5 9tz package NetFox; uPb9j;Q? s|dL.@0,L AQ@A$ public class SiteInfoBean { )p( XY34] ))u$j4V /ZX8gR5x private String sSiteURL; //Site's URL J>x)J}:; private String sFilePath; //Saved File's Path :N(L7&< private String sFileName; //Saved File's Name 61CNEzQ private int nSplitter; //Count of Splited Downloading File HnZrRHT0 {{:MJ\_"h_ ("wPkm^ public SiteInfoBean() CEt_wKzf {//nSplitter的缺省值为5 |(Io(e //default value of nSplitter is 5 \U p<m>3\ this("","","",5); I5PaY.i } 2L ~U^ lYU_uFOs\ RQv`D&u_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ykM(`
1`m { W>'R<IY4#N sSiteURL= sURL; s|YY i~ sFilePath = sPath; R>#T{<<L sFileName = sName; t:$p8qR this.nSplitter = nSpiltter; t4h5R 6<FJ`l]U9 E9QNx62 } 7vgz=-
MZ# dEns|r si0jXue~j\ public String getSSiteURL() XW`&1qx { ^i#F+Q`1 return sSiteURL; QfRt3\^` } mLKwk6I liPUK # ^hTq~ " public void setSSiteURL(String value) YgrBIul { '^}l|( sSiteURL = value; Ch^Al2)= } G,$RsP %;9wToyK> |\Jpjm)? public String getSFilePath() 2~~Q NWN { z&9vKF return sFilePath; w9l)=[s= } ?zKDPBj
*}cF]8c5W MZ6?s(mkx public void setSFilePath(String value) '9H]SEw { MX6;ww sFilePath = value; `fc2vaSH = } O>)8< yi$ &PgbFy
*_3+ DF public String getSFileName() /k(0}g=\ { :1=mNrg return sFileName; Jc:*X4-' } .Mdxbs6.C D@FJVF7c L0_R2EA public void setSFileName(String value) u%3Z +[ { \<a(@#E*~ sFileName = value; qtD3<iWV } #2{ };) ``K.4sG -E?h^J&U public int getNSplitter() !~"q$T>@ { UvxJ _ return nSplitter; I4gyGg$H } YjoN:z`b Of SYOL7o i{
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public void setNSplitter(int nCount) , z<\ Z!+= { %)u5A!" nSplitter = nCount; \c_1uDRoUn } ZSU;>&>%v } qbFzA
i yd2v_ >:!TfuU^R /* JEL=,0J **Utility.java Yv\.QrxPm */ awQf$ package NetFox; =W"BfG v|C)Q %v *
xdS< public class Utility { !2s<
v Nc:, [8{l OM*N) * public Utility() ;Y5"[C9| { _Il/ i& 4h\MSTF* QijEb } $m] ~d6 n*(Vf'k //线程睡眠 d?C8rkV' public static void sleep(int nSecond) qRT1W re
3 { `d2}>
try{ )eop:!m Thread.sleep(nSecond); }\k"azQ` } ^o}!=aMr catch(Exception e) Pf5RlpL:p { &2C6q04b e.printStackTrace (); ~gQ$etPd } .<}(J#vC } z1XFc*5 kFZw"5hb //日志 PXof-W public static void log(String sMsg) h4N!zj[ { o65:)z
u System.err.println(sMsg);
{Hm0 Q } u;18s-NY %wn|H> %p6"Sg* public static void log(int sMsg) [,e[~J`C { ,rVm81-2 System.err.println(sMsg); gq~>S1 } r\Nf309~ } !7"-9n o_ka'| `VX]vumG /* >MZWm6M8 **TestMethod.java ac%%*HN, */ o<ak&LX`9 package NetFox; e0Cr> I5/e 9AK<<Mge. ]CsF} wr'z public class TestMethod { Z?
u\ ]`)50\pdw Mk9' public TestMethod() pt .0%3 { ///xx/weblogic60b2_win.exe UhQ [|c try{ XF(0>- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); N+%E=D> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ${Cb1|g>j SiteFileFetch fileFetch = new SiteFileFetch(bean); 5RCQ<1 fileFetch.start(); }UNRe]ft$ } ieXhOA catch(Exception e){e.printStackTrace ();} ]4wyuP,up Tn2nd >fRI^Q, } Q/&H3N d~@&*1} o"dX3jd public static void main(String[] args) w=5 D>] { ovJ#2_ new TestMethod(); m"*j J.MX } |fnP@k } vn<z\wVbf 点击下载更多相关资料
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