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/* /b@8#px **SiteFileFetch.java iZwt,)( */ UOy`N~\gh+ package NetFox; O9dIobu4 import java.io.*; 2u *o/L+ import java.net.*; NK~j>>^;v F%+/j5~^ I|n<B"Q6^ public class SiteFileFetch extends Thread { @i$9c)D 9`$fU)K[Pl go@UE2qw SiteInfoBean siteInfoBean = null; //文件信息Bean /al(=zf long[] nStartPos; //开始位置 1ePZs$ long[] nEndPos; //结束位置 l~!\<, ! FileSplitterFetch[] fileSplitterFetch; //子线程对象 liA)|.H long nFileLength; //文件长度 #dtYa boolean bFirst = true; //是否第一次取文件 JC_Y#kN@z boolean bStop = false; //停止标志 S c_*L<$ File tmpFile; //文件下载的临时信息 @F+4
NL-'P DataOutputStream output; //输出到文件的输出流 a:XVu0`( tUDOL-Tv //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) .`)\GjDv public SiteFileFetch(SiteInfoBean bean) throws IOException .MXznz { XWf8ZZj siteInfoBean = bean; B<I%:SkF@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); c'vxT<8fWW tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); -*_D! if(tmpFile.exists ()) k>FMy#N|@ { +=)<
Su. bFirst = false; \=kH7 ! read_nPos(); T\{ on[O } *}-X
'_ else A{bt
Z#k { N)RyRR.x1. nStartPos = new long[bean.getNSplitter()]; _rR+u56y- nEndPos = new long[bean.getNSplitter()]; p&>*bF, } (vB aem9 <IC=x(T S1E=E5 SsIy ;l } <%8j#@OdZ -}/u?3^- E5~HH($b public void run() j#f+0 { N /p9Ws //获得文件长度 2%m H //分割文件 &BY%<h0c //实例FileSplitterFetch V}. uF,>V //启动FileSplitterFetch线程 d(3F:dbk //等待子线程返回 X* KQWs. try{ =;W"Pi;* if(bFirst) .0:BgM { rjo/-910 nFileLength = getFileSize(); D^baXp8 if(nFileLength == -1) .{1G"(z { zH0%;
o} System.err.println("File Length is not known!"); [ >O4hifq } 9z$]hl else if(nFileLength == -2) Z3g6?2w6 { "o2p|2c System.err.println("File is not access!"); GpMKOjVm| } o]t6u .L else HgvgO\`] { ?l!L
)!2 for(int i=0;i<nStartPos.length;i++) ig4wwd@| { %0fF_OU nStartPos = (long)(i*(nFileLength/nStartPos.length)); I?YTX } ZR.1SA0x?O for(int i=0;i<nEndPos.length-1;i++) [^EU'lewnW { w,bILv) nEndPos = nStartPos[i+1]; QM\vruTB } o@>{kzCx nEndPos[nEndPos.length-1] = nFileLength; / *RDy!m } 7g[m,48{ } orVsMT[A W$B&asO *;"N kCf //启动子线程 |s-q+q{| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }__g\?Yf for(int i=0;i<nStartPos.length;i++) es]\xw { +0rMv fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Z4A
a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q/m))!ikMt nStartPos,nEndPos,i); 7}OzTup Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %_0,z`f fileSplitterFetch.start(); k_/hgO } {_0Efc=7 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WMnR+?q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); S+py\z% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ] e!CH
<N nEndPos = " + nFileLength); c9-$td& // fileSplitterFetch[nPos.length-1].start(); f{xR
s-u] ?v-IN 7F;"=DarOE //等待子线程结束 ]:i
:QiYD //int count = 0; i>HipD,TD //是否结束while循环 vo)pT boolean breakWhile = false; 4!p~Mr[E )^7Y^ue sDT(3{)L7 while(!bStop) RIOR%~U { 79U
Th@r} write_nPos(); Genk YtS Utility.sleep(500); vpcHJ^19 breakWhile = true; wUWSW< ^"7tfo8 daf$` for(int i=0;i<nStartPos.length;i++) -ZFeE[Z { ("0@_05OH if(!fileSplitterFetch.bDownOver) dya]^L}fL { T=35? breakWhile = false; }ddwL break; xoF]r$sC8 } [SgWUP* } #qXE[% if(breakWhile) DnvJx!#R break; DE|r~TQ |};]^5s9 @P#uH5U //count++; ";E Mu(IXb //if(count>4) &f'\9lO // siteStop(); i#$9>X } -FytkM^]6 yn<H^c FL% GW: System.err.println("文件下载结束!"); CnruaN@ } rLs)*A! catch(Exception e){e.printStackTrace ();} Y^m2ealC } Oe4 l`
=2 0-p LCf Z]D O //获得文件长度 CXks~b3SD public long getFileSize() g66=3c9</6 { ez=$ ]cln int nFileLength = -1; [?x9NQ{ try{ -NtT@ +AE URL url = new URL(siteInfoBean.getSSiteURL()); [Av#Z)R HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fN~kdm. httpConnection.setRequestProperty("User-Agent","NetFox"); Mnyg:y*= biG=4?Xl Tl5K'3 int responseCode=httpConnection.getResponseCode(); zqfv|3-!} if(responseCode>=400) DrLNY"Zq { []:;8fY processErrorCode(responseCode); $T{,3;kt return -2; //-2 represent access is error *6^|i} } e`k6YO fL.;- {MdxIp[ String sHeader; zIt-mU c[E{9wp v #&0)kr66 for(int i=1;;i++) ZOc1 vj { Epj //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); J01w\#62pQ //Utility.log(in.readLine()); 3{RuR+yi sHeader=httpConnection.getHeaderFieldKey(i); J~KWn. if(sHeader!=null) NLFs)6\ { GdG1e%y]z if(sHeader.equals("Content-Length")) PxzeN6f { (RG\U[ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); s<gZB:~ break; kK&tB } 7Ipt~K} } E*ybf' else \]GO*]CaV break; B!GpD@U } F{)YdqQ } v1<gNb)` catch(IOException e){e.printStackTrace ();} _6" vPN catch(Exception e){e.printStackTrace ();} {PgB~|W r)Ts(#Z T:o!H
Xdj^ Utility.log(nFileLength); :zfnp,Gv v#&r3ZW0 0fA42*s; return nFileLength; ]#R'hL%f } ?g|K"P<1 :J]S+tQ) WsRG>w3" //保存下载信息(文件指针位置) =Xze ).g private void write_nPos() 44FK%TmtF { "6_#APoP try{ fgg^B[(Y output = new DataOutputStream(new FileOutputStream(tmpFile)); 9|WBJ6 output.writeInt(nStartPos.length); E9pKR+P for(int i=0;i<nStartPos.length;i++) O$u;]cg { -
{<`Z // output.writeLong(nPos); !O
F#4N output.writeLong(fileSplitterFetch.nStartPos); \DBoe:0~ output.writeLong(fileSplitterFetch.nEndPos); 5MV4N[; } _d6mf4M]5 output.close(); }MP2)6 } FP<RoA?W catch(IOException e){e.printStackTrace ();} $l-|abLELz catch(Exception e){e.printStackTrace ();} f gI.q } P`6
T;|VDk uXq?Z@af|f {`QF(WL //读取保存的下载信息(文件指针位置) h
Vz%{R" private void read_nPos() #<f}.P.Uc { yveyAsN`B try{ Yf.H$L DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); uW%7X2K int nCount = input.readInt(); MuB8gSu nStartPos = new long[nCount]; 3GqJs nEndPos = new long[nCount]; ~ z4T
for(int i=0;i<nStartPos.length;i++) v:1l2Y)g { mNN,}nHu nStartPos = input.readLong(); ZiM#g1; nEndPos = input.readLong(); AE!WYE } '7o'u] input.close(); #@H{Ypn` } %Y%+K5;AZ catch(IOException e){e.printStackTrace ();} }u
cqzdk#2 catch(Exception e){e.printStackTrace ();} 4 q}1 } 1<A+.W WI9'$hB\ )?~3fb6^ private void processErrorCode(int nErrorCode) YS=|y}Q|7d { sN|-V+7&j System.err.println("Error Code : " + nErrorCode); >C"cv^%c } ;OQ-T+(T 9(lIz{ lz\{ X //停止文件下载 !jY/}M~F1 public void siteStop() +4\JY"oi { SFoF]U09 bStop = true; vM~/|)^0sW for(int i=0;i<nStartPos.length;i++) i0/gyK fileSplitterFetch.splitterStop(); RtH[OZu(8 %(;jx 8~RUYsg } ]W<E#^ } I=D{(%+^d //负责部分文件的抓取 Na: M1Uhb **FileSplitterFetch.java 6nt$o)[ */ 6yk package NetFox; St,IWOmq" 8B;`9?CI 7p3 ;b"' import java.io.*; (ii 5p nq import java.net.*; }#zE`IT nQK@Uy5Yr ;hF >iw public class FileSplitterFetch extends Thread { B)
&BqZ& u~<>jAy HP|,AmVLl String sURL; //File URL =sRd5aMs long nStartPos; //File Snippet Start Position I@cKiB long nEndPos; //File Snippet End Position E#Ynn6 int nThreadID; //Thread's ID i_g="^ boolean bDownOver = false; //Downing is over S$W
*i@x? boolean bStop = false; //Stop identical RL~|Kr<7J FileAccessI fileAccessI = null; //File Access interface #W
1`vke3 OH5
kT$
j^KM public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException deaxb8'7 { .6!]RA5!= this.sURL = sURL; J&^r}6D this.nStartPos = nStart; :eS7"EG{3 this.nEndPos = nEnd; \F,?ptu nThreadID = id; ;1S{xd*^N fileAccessI = new FileAccessI(sName,nStartPos);//定位
&k\7fvF } z QoMHFL3 Xfx(X4$ 9 .
)Fn]x"< public void run() H:U1#bQQ: { ;G!X?(%+ while(nStartPos < nEndPos && !bStop) SynxMUlA { l1jS2O( W#e:r z8= r&}fn"H! try{ l*_b)&CH URL url = new URL(sURL); `@ qSDW!b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )ty
*_@N0 httpConnection.setRequestProperty("User-Agent","NetFox"); IK{0Y#c String sProperty = "bytes="+nStartPos+"-"; /.'1i4Xa1P httpConnection.setRequestProperty("RANGE",sProperty); \yb^%$hZ0
Utility.log(sProperty); ~J)4 (411 GY,@jp|R sC
]&Qr_ InputStream input = httpConnection.getInputStream(); F"hi2@/TI //logResponseHead(httpConnection); [KWF7GQi
)%;#~\A `]5XY8^kI byte[] b = new byte[1024]; {xEX_$nv int nRead; wX#\\Jgi while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9foQ0#R { g%j z,| nStartPos += fileAccessI.write(b,0,nRead); s`C#=l4 //if(nThreadID == 1) f:7Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ++,mM7a } -2> L*"^ Uo^s]H#: kKE2~ q Utility.log("Thread " + nThreadID + " is over!"); G2a fHL< bDownOver = true; Iay7Fkv //nPos = fileAccessI.write (b,0,nRead); ,-] JCcH } :KX/` catch(Exception e){e.printStackTrace ();} XIBw&mWf } Ea\a: } W7(OrA! U@& <5' }C"#b\A2 //打印回应的头信息 ct~lt'L\ public void logResponseHead(HttpURLConnection con) )yJe h { J)(]cW. for(int i=1;;i++) b${Kj3( { 1}[\@n+b String header=con.getHeaderFieldKey(i); b4%IyJr if(header!=null) Syp|s3u; //responseHeaders.put(header,httpConnection.getHeaderField(header)); h^hEyrJw
Utility.log(header+" : "+con.getHeaderField(header)); wk9tJ#} else +Ya-h~7;g# break;
C&e } %Pa-fee } `9K'I-hv<8 _tjFb_}Q
3J'a public void splitterStop() Y#]Y$n { W:rzfO.`Z bStop = true; DT 9i<kl } C
2oll-kN b17p;wS G>:l(PW: } #Q'i/|g B]*&lRR S^x9 2&! /* y]?$zbB **FileAccess.java "g=ux^+X\ *//文件访问(定位,写) n1sH`C[c package NetFox; `=-}S+ import java.io.*; $S,Uoh @~63%6r#4M zLxWyPM0; public class FileAccessI implements Serializable{ ?erDP8 2lp.Td`{ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 HNh=igu RandomAccessFile oSavedFile; ;quGy3 long nPos; 3ZZJYf= sn Ekei|0 D^&! public FileAccessI() throws IOException `J-"S<c?_ { '
>\* this("",0); n53}79Uiz } aY {. m
*JpEBtTv=5 public FileAccessI(String sName,long nPos) throws IOException #;mZ3[+i5 { YF:NRY[i oSavedFile = new RandomAccessFile(sName,"rw"); )bK<t this.nPos = nPos; Sl$dXB@ oSavedFile.seek(nPos); pp{); } U-lN_? uq 6T|Zm T.1z<l"" public synchronized int write(byte[] b,int nStart,int nLen) 6=')*_~/ { 4a3f!G$ int n = -1; M1ayAXO try{ sdO;vp^:b oSavedFile.write(b,nStart,nLen); 6iC}%eU n = nLen; 2j"%}& } r{<u\>6X>P catch(IOException e) #%{\59/w { 3Q;^X(Ml* e.printStackTrace (); G2jEwi } 71)#'ey t]@Zd* yNDyh return n; lN1zfM } uY;/3?k& /kJ*WA?J a)TNVm^ } VJ$C)0xQA aIfog+Lp 3oKqj> /* lo(Ht=d **SiteInfoBean.java Fza)dJ7 */ @Td[rHl package NetFox; l+N?:E$5=% PO}Q8Q3 h:GOcLYM@X public class SiteInfoBean { @O3w4Zs w_{z"VeD 7}lZa~/ private String sSiteURL; //Site's URL NMj`wQ`M+ private String sFilePath; //Saved File's Path HOUyB's' private String sFileName; //Saved File's Name /f6]XP\'`+ private int nSplitter; //Count of Splited Downloading File 4kz8U |Ji?p>\~ YT3QwN9 public SiteInfoBean() _Ng*K]0/E {//nSplitter的缺省值为5 rxz3Mqg //default value of nSplitter is 5 ad~ qr n\ this("","","",5); GqAedz ;. } F9c2JBOM xH
f9N? sEj:%`l| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7<tqT
@c { b\+|g9Tm sSiteURL= sURL; cj8r-Vu/N sFilePath = sPath; lLJb3[
e. sFileName = sName; XWvs~Xw@ this.nSplitter = nSpiltter; KXM-GIRUG .o-j Lhc@*_2 } <.' cCY J`8>QMK^5 s<dD>SU public String getSSiteURL() @t2 Q5c { P0Jd6"sS" return sSiteURL; $x)'_o}e } .ClCP?HG *.+>ur?t -'0AV,{Z public void setSSiteURL(String value) Mu (Y6 { {xykf7zp sSiteURL = value; 'w!gQ#De } h1kPsgzR |l?ALP_g C0fA3y72 public String getSFilePath() SB'YV#-- { ,mX|TI<* return sFilePath; A8RT3OiXA } (gf\VYM-7 f|G7L5- KGWENX_U public void setSFilePath(String value) q%'ovX(dm { 395o[YZx* sFilePath = value; $ i&$ZdX } 5]Ra?rF `MwQ6%lf Gzfb|9,q public String getSFileName() R] [M_ r { hHg
gH4T return sFileName; &59#$LyH`% } 6nfkZvn Y-Ku2m M+E5PZ|_
public void setSFileName(String value) 4GfLS.Ip { /SKr.S61e sFileName = value; 'f}S,i +q } ]p*)
PpIl :fYwFD( 9 6uXW`/lvX public int getNSplitter() 0oJ^a^| { iy#OmI>j return nSplitter; YJ^ lM\/< } h]MVFn{ -5cH$]1\ cMWO_$ public void setNSplitter(int nCount) qQcC[50 { bZ9NnSuH nSplitter = nCount; F=om^6G%X5 } 5Hm!5:ZB } 9aU:[]w GA_`C"mx Riw7<j /* Q kZM(pG **Utility.java eE{L>u */ :.Qe=}9 package NetFox; i@CMPz-h& ;
BZM~'
$i@EfujY public class Utility { D,n}Qf!GYk XeSbA ?R]y}6P$ public Utility() ye|a#a9N { oyt//SE {~^)-^Wt: G; [AQ:Iy } UBi4 itGD VqL
5f //线程睡眠 6)U&XWH0 public static void sleep(int nSecond) {g- DM}q { 9xQ8` 7 try{ 4LEE
/ Thread.sleep(nSecond); NN 6KLbC( } :2pBv#\"qk catch(Exception e) o1WidJ" { yOK])&c e.printStackTrace (); SO<m(o)G2 } l>UUaf|O } GeaDaYh#T 0Mu8ZVI{ //日志 o$ce1LO?|N public static void log(String sMsg) KF_Wu}q
d { klJ[ {p System.err.println(sMsg); F!&pENQ } 2]3HX3 ~Ex.Yp8. :dguQ|e public static void log(int sMsg) b!X"2' { EOX_[ek7 System.err.println(sMsg); 06^1#M$' } j 3MciQ` } nbASpa( Dum`o^l# bfJ`}xl(8 /* 6rQpK&Jx **TestMethod.java v$m[#&O^V? */ 0BCGJFZ{ package NetFox; OJsd[l3xR m6r )Z5}f XLmMK{gs public class TestMethod { o~x39 ~'2r&?=\ bkwa{V public TestMethod() .W : { ///xx/weblogic60b2_win.exe LBkc s4+ try{ q Iy^N:C2' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); A3$aMCwKd //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8F^,8kIR SiteFileFetch fileFetch = new SiteFileFetch(bean); RF5q5<0 fileFetch.start(); |R;l5ZKvV } E,LYS"%_ catch(Exception e){e.printStackTrace ();} F[kW:-ne@Z zZ9<4"CIk 9*|3E"Vr } %md^S
| V 7l{hEo3? }11`98>B6: public static void main(String[] args) %i&/$0.8 { ^+as\ new TestMethod(); 6%kJDY. } S&3X~jD(1 } (~Uel1~@ 点击下载更多相关资料
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