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/* sYY=MD
**SiteFileFetch.java 0!,)7 */ N0G-/ package NetFox; z/t:gc. import java.io.*; /WIHG0D import java.net.*; -Fs^^={Q 9wC:8@`6E O5p]E7/e public class SiteFileFetch extends Thread { 2F#R;B#2 Zx}.mt#}8 "227 U)Q SiteInfoBean siteInfoBean = null; //文件信息Bean ?#X`Eu long[] nStartPos; //开始位置
@OPyT long[] nEndPos; //结束位置 )SYZ*=ezl. FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;j/-ndd&& long nFileLength; //文件长度 6'N!)b^- boolean bFirst = true; //是否第一次取文件 )04lf*ti boolean bStop = false; //停止标志 ';?b99 File tmpFile; //文件下载的临时信息 /A) v$Bv= DataOutputStream output; //输出到文件的输出流 a4M`Bk;mb ]]Da/^K=Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +kTa>U<? public SiteFileFetch(SiteInfoBean bean) throws IOException _;+N=/l0 { $0K%H siteInfoBean = bean; 0IEFCDeCO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^R4eW|H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); k6 f;A if(tmpFile.exists ()) |79!exVMBp {
]=g|e bFirst = false; x9NLJI21/ read_nPos(); (FAd'$lhX} } 6\9 9WQ else d/ OIc){tD { <WGl4#(k nStartPos = new long[bean.getNSplitter()]; cnOk nEndPos = new long[bean.getNSplitter()]; wp,z~raaS } :B'}#;8_
:{tvAdMl7 l<$c.GgFd s:/.:e_PU } :22IY>p 2;`"B|-T ]-aeoa# public void run() oa?eK { $V)LGu2(m //获得文件长度 ]4>[y?k34 //分割文件 bMD'teJ //实例FileSplitterFetch ^9UF
Pij" //启动FileSplitterFetch线程 HYPFe|t/ //等待子线程返回 +B@NSEy/+ try{ S!n
9A if(bFirst) VBssn]w { 3EcmNwr nFileLength = getFileSize(); <z|? C if(nFileLength == -1) u-h3xj { 0PnW|N0 System.err.println("File Length is not known!"); TUEEwDK- } '.@R_sj else if(nFileLength == -2) j]<T\O>t> { 0\jOg System.err.println("File is not access!"); 3Fn26Rij } 7
v<$l else #?i#q%q { y=\jQ6Fc for(int i=0;i<nStartPos.length;i++)
Tc)T0dRP { %f&(U/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); morI'6N } |pp @ for(int i=0;i<nEndPos.length-1;i++) ?8(`tS(_? { S~F:%@,* nEndPos = nStartPos[i+1]; T}[W')[s } As (C8C< nEndPos[nEndPos.length-1] = nFileLength; h& (@gU`A } 2`vCQV } Q[p0bD: C<fNIc~. )B*?se]LJ //启动子线程 ?4Z0)%6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
jl2nRo for(int i=0;i<nStartPos.length;i++) )
ZOmv { S_:(I^ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @6$r|:]G- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ooIMN = nStartPos,nEndPos,i); >UJ&noUD#: Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ),\>'{~5& fileSplitterFetch.start(); `z)!!y } }]zmp/;a // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), GGF;T&DWad siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {zUc*9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "\BP+AF nEndPos = " + nFileLength); Whd4-pR8 // fileSplitterFetch[nPos.length-1].start(); }C7tlA8,7 s80_e #s#z@F //等待子线程结束 G-3.- //int count = 0; #K!Df%,< //是否结束while循环 pLzsL>6h boolean breakWhile = false; *!9/`zW :/vB,JC U&3*c+B4 while(!bStop) hDlk! #* { RC (v#G write_nPos(); Ti3BlWQH Utility.sleep(500); {u.V8%8 breakWhile = true; bOck^1Hk y kM3BP&
3m1 MmWJYF= for(int i=0;i<nStartPos.length;i++) &OhKx {
o@LjSQ5! if(!fileSplitterFetch.bDownOver) &"tce6& { \ @N> 38M breakWhile = false; ?3}UO:B break; EJWMr`zdn } 38q@4U=aiw } ,uKvE`H if(breakWhile) &{]%=stI break; @su{Uno8/ qfSoF| fSqbGoIQ //count++; dBlOU.B //if(count>4) U*&ZQw // siteStop(); {yb\p9q{Yo } YRp\#pVnZ J82{PfQ" ~2H7_+.# System.err.println("文件下载结束!"); Jl]]nOBQ/ } km c9P& catch(Exception e){e.printStackTrace ();} u=E?N:I~F } '-i
tn h{* O9O< p fBO5Ys //获得文件长度 _kY5
6 public long getFileSize() zi?'3T%Ie { 3yKI2en" int nFileLength = -1; AVyZ#`, try{ MW`a>'0t? URL url = new URL(siteInfoBean.getSSiteURL()); /a$+EQ$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D`t e|K5 httpConnection.setRequestProperty("User-Agent","NetFox"); rmMO-!s Yip9K[ >|Jw,,uf int responseCode=httpConnection.getResponseCode(); jujx3rnK? if(responseCode>=400) D} .t { /XSPVc< processErrorCode(responseCode); tJwF
h6 return -2; //-2 represent access is error
l#~FeD } r0X2cc /M3D[aR<d z'qVEHc) String sHeader; }a9C/t3 p_z"Uwp h+74W0
$ for(int i=1;;i++) &16bZw { ,{Ab=xV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); X#3<hN*v //Utility.log(in.readLine()); )2FO+_K?T sHeader=httpConnection.getHeaderFieldKey(i); fjWh}w8 if(sHeader!=null) gNqV>p { 2YN`:" if(sHeader.equals("Content-Length")) '.K,EM!-~h { Wl#^Eu\g1W nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {;4PP463 break; Qi[D&47XO } t<|s& } .u*].As= else t~M<j|]k break; y[|g!9Rp } =+"'=o } ;yZ N
"r catch(IOException e){e.printStackTrace ();} +E [b Lz^ catch(Exception e){e.printStackTrace ();} *(`.h\+ $0*47+f MzG ryM- Utility.log(nFileLength); &!a2%%1#N lBn*G&(P m4DH90~a8 return nFileLength; 5HbTgNI } - X_w& 6J
5)4^bk od}x7RI%m //保存下载信息(文件指针位置) 'YR5i^:t private void write_nPos() w+37'vQ { yo.SPd="Vx try{ "<2bjy output = new DataOutputStream(new FileOutputStream(tmpFile)); {T.Vu]L80 output.writeInt(nStartPos.length); v 2 GhR* for(int i=0;i<nStartPos.length;i++) O<h#|g1 { z`5I1#PVA // output.writeLong(nPos); Ozv.;}SE output.writeLong(fileSplitterFetch.nStartPos); vs@:L)GW\
output.writeLong(fileSplitterFetch.nEndPos); spx;QLo } 2SJh6U output.close(); %^l&fM* } u}1vn} F{ catch(IOException e){e.printStackTrace ();} )/Xrhhx catch(Exception e){e.printStackTrace ();} /
3k\kkv! } 5lxq-E3 ee_\_" Tqa4~|6 //读取保存的下载信息(文件指针位置) x!~OK::o8 private void read_nPos() %~5Q^3$O { GF!{SO4 try{ GnOo+hB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W`'|&7~ int nCount = input.readInt(); V
3]p3 nStartPos = new long[nCount];
)M N
yOj nEndPos = new long[nCount]; tKeO+6 l for(int i=0;i<nStartPos.length;i++) XC1lo4| { erP>P nStartPos = input.readLong(); 9,5II0N L nEndPos = input.readLong(); 62x< rph } &&]!+fTZ\( input.close(); vEe } ++!E9GU{ catch(IOException e){e.printStackTrace ();} &{/>Sv!6# catch(Exception e){e.printStackTrace ();} i`aG } (YJAT #=H}6!18 Zax]i,Bx private void processErrorCode(int nErrorCode) -b)zira { G`#gV"PlC System.err.println("Error Code : " + nErrorCode); ,A!e"=HF } b<(UmRxx3 Mr NOcx& 9;Pu9s[q2 //停止文件下载 ) .-(-6=R public void siteStop() A Wh*<H { :$cSQ(q9a bStop = true; a H|OA\< for(int i=0;i<nStartPos.length;i++) K@sP~(' fileSplitterFetch.splitterStop(); _{`'{u
@
U8}sH^ u1|P'>;lF } e=]oh$] } h NOYFH //负责部分文件的抓取 "4k=(R? **FileSplitterFetch.java 1xdESorX( */ _IKP{WNB package NetFox; @j\?h$A/ v8vh~^X%P ({_:^$E\ import java.io.*; ?J@?,rZQ^V import java.net.*; x$5nLS2. ;*4tVp, t6%xit+ public class FileSplitterFetch extends Thread { FP'u)eU&3 SeZT4y*= GE~(N N String sURL; //File URL &iND&>? long nStartPos; //File Snippet Start Position Xq^y<[ long nEndPos; //File Snippet End Position ^z%o]; int nThreadID; //Thread's ID }M9DqZ;I boolean bDownOver = false; //Downing is over Nzi/3r7m boolean bStop = false; //Stop identical R3{*v =ov FileAccessI fileAccessI = null; //File Access interface %AEK[W+0 KB,~u*~! @Uj_+c
q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException t1:S!@ { 8/>wgY this.sURL = sURL; 3^A/`8R7K this.nStartPos = nStart; ,F?~'-K this.nEndPos = nEnd; 28Ssb| nThreadID = id; ;x3 ]4^ fileAccessI = new FileAccessI(sName,nStartPos);//定位 J<($L}T*$ } nhQ44qRgQ AeY$.b %is,t<G public void run() ny { 3dX=xuQ%/ while(nStartPos < nEndPos && !bStop) @1/}-.(n { jgo<#AJ/E f.$aFOn ^!o1l-Y^gr try{ !7kLFW URL url = new URL(sURL); H81.p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); PX69 httpConnection.setRequestProperty("User-Agent","NetFox"); /_:T\`5uO String sProperty = "bytes="+nStartPos+"-"; @O<@f8- httpConnection.setRequestProperty("RANGE",sProperty); #lyM+.T Utility.log(sProperty); K[#v(<) Qw6KX#n p-i.ITRS InputStream input = httpConnection.getInputStream(); |auX*hb9 //logResponseHead(httpConnection); 1O]5/Eu f1CMR4D hP4)8 > byte[] b = new byte[1024]; rAlh&
?X int nRead; i!.I;@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Wlr&g
xZ { h=K36a) nStartPos += fileAccessI.write(b,0,nRead); e\^g|60f_ //if(nThreadID == 1) w]W`R. // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); PzMlua } ~E<PtDab ^EC)~HP@C `bZ2x@ Utility.log("Thread " + nThreadID + " is over!"); :tjgg] bDownOver = true; 409x!d~it //nPos = fileAccessI.write (b,0,nRead); <uBhi4 } #Cg}!38 catch(Exception e){e.printStackTrace ();} +#-kIaU } ^&`sWO@= } Mz/]D J8 +gbX}jF0% Q{.{#G //打印回应的头信息 )]c]el@y public void logResponseHead(HttpURLConnection con) LXh@o1 { KJ0xp hf for(int i=1;;i++) (^DLCP#* { WA]%,6 String header=con.getHeaderFieldKey(i); :Wyn+ if(header!=null) P0'e"\$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); H}) Dcg3 Utility.log(header+" : "+con.getHeaderField(header)); i14[3bPLk! else VjA wn}eO break; 7]/dg*A )C } K9e~Wl<3 } 2Y E;m& 4T-,'P{? KMxNH,5 public void splitterStop() 2~G,Ia { W"b&M%y| bStop = true; QMXD9H0{ } O8K@&V p wMH[QYb<* S s@u,`pr } Xmap9x Q vv\+Jp^ p3M#XC_H] /* rxs~y{Xi **FileAccess.java Z&+NmOY4 *//文件访问(定位,写) /v}P)& package NetFox; 5u2{n rc import java.io.*; XKz;o^1a^ )z2|"Lp G$?|S@I, public class FileAccessI implements Serializable{ 4zo4H~@gk rao</jN.9 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?1GY%- RandomAccessFile oSavedFile; ^lHb&\X long nPos; 1fz*SIjG zAeGkP ~K 9">zdFC' public FileAccessI() throws IOException fOa6, { kZV^F*7 this("",0); |?OdV<5C } fH{9]TU_: Zi 2o 1% $d D2 public FileAccessI(String sName,long nPos) throws IOException &Q\_; { ! (2-(LgA oSavedFile = new RandomAccessFile(sName,"rw"); 9
9Ba{qj this.nPos = nPos; !MZ+- dpK oSavedFile.seek(nPos); RL?u n}Qa } u]
F70C^~ Ni+3b I#"t'=9H public synchronized int write(byte[] b,int nStart,int nLen) L8K0^~Mk { 4`'8fe/" int n = -1; [8,PO try{ O0@w(L- oSavedFile.write(b,nStart,nLen); 6eOrs-ty n = nLen; I\}|Y+C$d/ } z=ML(1c= catch(IOException e) OJ v}kwV { |BwRlE2CFO e.printStackTrace (); El~-M`Gf } UH5w7M EoKC8/ z7-`Y9Ypd return n; +O)]^"TG } 3^!Hl8P7 Q Oz9\,C 6exRS]BI } DZ^=*. X Y~;)<s_ .qSBh
hH\ /* "Kyifw? **SiteInfoBean.java /nc~T3j */ {*N^C@ package NetFox; .4wTjbO6 fJX\'Rc\
KR&s? public class SiteInfoBean { }0$mn)*k 2< p{z I^WIa"u_ private String sSiteURL; //Site's URL fs&,w private String sFilePath; //Saved File's Path ]\OWZ{T'j private String sFileName; //Saved File's Name W@l+ciZ_ private int nSplitter; //Count of Splited Downloading File 3@&bxYXm o>2e!7 c\M#5+ 1j public SiteInfoBean() 6^Ph ' {//nSplitter的缺省值为5 {]=v]O|, //default value of nSplitter is 5 IQT cYl this("","","",5); 3=Z<wD s } {] O`gG ,:^
N[b x Y| yI> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) x;Gz6| { IeVLn^?+: sSiteURL= sURL; JL.5QzA sFilePath = sPath; NjbwGcH%\ sFileName = sName; z+jh;!i this.nSplitter = nSpiltter; tG/1pW Mec{_jiH&D 8 4z6zFv?Q } 2
#KoN8% qtHfz"p +O'vj public String getSSiteURL() {1~9vHAZ { 9SY(EL return sSiteURL; JX{KYU } .8]Y- 6_*!|g Kh)FyV public void setSSiteURL(String value) BBvZeG $Y { L!g DFZr sSiteURL = value; jPnO@H1 } z!:'V] M`~!u/D7 :lK4
db public String getSFilePath() p'&*r2_ram { ob'n{T+lZ return sFilePath; *xcP` } ;W0]66& +vz`go 2/@D7>F&g public void setSFilePath(String value) >\ZR*CS { k5@d! }#c sFilePath = value; 8a9RML}G< } =<{ RX8 {rC~P S8%n .<OB public String getSFileName() kg3ppt { h~w4, T return sFileName; ~s#e,Kav" } X2gz6|WJ ^Gq5ig1rxy 8%[HYgd5) public void setSFileName(String value) B;!f<"a8 { +yWR#[`n sFileName = value; RZO5=L9E } 6Nt$ZYS (;}tf~~r #.<V^ public int getNSplitter() 6^;^rUlm { ' "'Btxz return nSplitter; H] k'?; } jJ~Y]dQi zE`R,:VI 0+EN@Y^dAV public void setNSplitter(int nCount) Uki9/QiX> { 8Bpip nSplitter = nCount; .^[_V } .$Bwb/a } ]>Si0% i[150g?K iCTQ]H3 /* 7yI`e*EOD **Utility.java dn,g Z"< */ $D'^t( package NetFox; WA.AFt aV>aiR= z856 nl public class Utility { >|3a
9S 0@)%h&mD frN3S public Utility() Km3&N { DA"}A`HfI @T&t.|` :EZQ'3X } Y-p<qL|_ \k@Z7+&7 //线程睡眠 dB;3.<S= public static void sleep(int nSecond) "&lN\&: { Z0ReWrl;` try{ ~ y;y(4< Thread.sleep(nSecond); j7
d:v7+_ } J!h^egP catch(Exception e) '<@=vGsye { dTGA5c e.printStackTrace (); 7zDiHac } = .oHnMX2M } *Oo &}oAj }nud //日志 NQ9Ojj{# public static void log(String sMsg) w#(RW7":F { [f!O6moR6 System.err.println(sMsg); c8A`<-\MfB } &|5GB3H= },c,30V' IfV
3fJ7 public static void log(int sMsg) kWL.ewTiex { 4;KWG}~[o System.err.println(sMsg); 0JY WrPR } [VSU"AJY } EO)%UrWnC +.Bmkim &uM^0eM /* GXX+}=b7qO **TestMethod.java SwH2$:f */ &ZJgQ-Pc(m package NetFox; ^#e~g/ Veji^-0E 'v&}( public class TestMethod { O~@fXMthh 8Fq_i-u >UHa public TestMethod() C!%:o/ { ///xx/weblogic60b2_win.exe ;sPzOS9 try{ #[ -\lU| SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); @5<CXTdF9c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D59T?B|BdD SiteFileFetch fileFetch = new SiteFileFetch(bean); PRs@zkO fileFetch.start(); J]pa4C` } eThy+ catch(Exception e){e.printStackTrace ();} I@ \#up} "5!BU& .g% Y@r)=5 } vtxvS3
|L:Cn J zAScRg$:? public static void main(String[] args) >V;,#5F_ { qv+R:YYOq new TestMethod(); Bjj<\8^M } UUtbD&\ } <I=$ry6 8 点击下载更多相关资料
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