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/* yf[1?{iVo **SiteFileFetch.java )gz]F_ */ _R^ZXtypd package NetFox; aeVd.`lxM import java.io.*; 1Q=L/keP import java.net.*; /oZvm 9@?|rje9 uJ=d!Kn public class SiteFileFetch extends Thread { WZn"I&Z ~1XC5.*-
nI4oQE SiteInfoBean siteInfoBean = null; //文件信息Bean z0x^HDAeC long[] nStartPos; //开始位置 Lxn-M5RPQ long[] nEndPos; //结束位置 (/^?$~m" FileSplitterFetch[] fileSplitterFetch; //子线程对象 S'`G7ht long nFileLength; //文件长度 ~$ Po3]{s boolean bFirst = true; //是否第一次取文件 E^Ch;)j| boolean bStop = false; //停止标志 M;W&#Fz% File tmpFile; //文件下载的临时信息 03AQB;. DataOutputStream output; //输出到文件的输出流 Xq_hC"s 2s=zT5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~;-2eKw public SiteFileFetch(SiteInfoBean bean) throws IOException 0eKLp8;Lh { @NiLKcL# siteInfoBean = bean; Lr20xm //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8QMMKOui\ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); <Qr*!-Kc6 if(tmpFile.exists ()) ,gW$m~\ { @=}NMoNH bFirst = false; w#_7,*6] read_nPos(); q Y!LzKM0 } W4qnXD1n else ^$mCF%e8H { 4`'Rm/) nStartPos = new long[bean.getNSplitter()]; dKP| TRd nEndPos = new long[bean.getNSplitter()]; 4uH}
SG[ } RameaFX8 Unansk dNCd-ep 's5H_ah } K47.zu ,<C~DSAyZ [vz2< genn public void run() ?)[=>Kp { Sj:c {jyJd //获得文件长度 GY5JPl //分割文件 \acGSW
.c //实例FileSplitterFetch G^z>2P //启动FileSplitterFetch线程 Ted tmX$ //等待子线程返回 APJFy@l} try{ vR pO0qG if(bFirst) xIV#}z0 { Y9
Bk$$#\ nFileLength = getFileSize(); 1vAJ(O{- if(nFileLength == -1) fh66Gn, { }A[5\V^D* System.err.println("File Length is not known!"); o.Bbb=*rZ } IGo5b-ds else if(nFileLength == -2) rWqr-"0S. { il"pKQF System.err.println("File is not access!"); J9f]=1` } @HE?G else 1bDAi2 H { 2f{a|| for(int i=0;i<nStartPos.length;i++) '
QjJ^3A { Su[(IMw nStartPos = (long)(i*(nFileLength/nStartPos.length)); * *oDQwW]* } b7">IzAe
for(int i=0;i<nEndPos.length-1;i++) b\kA { fN21[Jv3 nEndPos = nStartPos[i+1]; +bR|;b(v } Z0v&AD= nEndPos[nEndPos.length-1] = nFileLength; uJ fXe } t0?tXe.B } meXwmO e2>AL h0A%KL //启动子线程 2S4SG\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]r%fAmj for(int i=0;i<nStartPos.length;i++) b/\l\\$- { )T&r770 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D'^%Q_;u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
m;TekJXm nStartPos,nEndPos,i); ??LE0i Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R((KAl]dL fileSplitterFetch.start(); i=hA. y` } NO/5pz}1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l<(jm{q?u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5zyd;y)|' // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", S!^I<#d K nEndPos = " + nFileLength); x^cJ~e2 // fileSplitterFetch[nPos.length-1].start(); Fiw^twz5 3Tc90p l*t FBOgaI83G //等待子线程结束 79k+R9m //int count = 0; P?jI:'u!R. //是否结束while循环 NF-@Q@ boolean breakWhile = false; 4af^SZ)l `D$RL*C;M` j0n.+CO-{ while(!bStop) )(c%QWz { |TF6&$>d write_nPos(); -q
nOq[ Utility.sleep(500); cFq2 6(e breakWhile = true; \JCpwNT{P 10GU2a$0"$ ~jz51[{v for(int i=0;i<nStartPos.length;i++) ~E vGNnTL { 9Sa6v?sRor if(!fileSplitterFetch.bDownOver) xK5~9StP { 7xO~v23oe breakWhile = false; )YZx]6\l) break; ^ ]+vtk } wS
>S\,LV } [ L
' > if(breakWhile) 6JRFYgI break; ivt ~S v_pFI8Cz) 0xaK"\Q //count++; [l7n"gJ~ //if(count>4) +Z=y/wY // siteStop(); f|3LeOyz } vfc,{F=Q 'e$8
IZm 2p58_^l System.err.println("文件下载结束!"); o!c~"
} 'TA
!JB+ catch(Exception e){e.printStackTrace ();} pTncx%!W5 } kjOkPp ;hEeFJ=/G 1F+JyZK}w //获得文件长度 )@=fGN Dt public long getFileSize() [dqh-7 { ''q#zEf6 int nFileLength = -1; L!`PM.:9 try{ k%aJ%( URL url = new URL(siteInfoBean.getSSiteURL()); SO<9?uk. HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hrXk 7}9 httpConnection.setRequestProperty("User-Agent","NetFox"); o]GZq.. I\Cg-&e "{2niBx int responseCode=httpConnection.getResponseCode(); 58eO|c( if(responseCode>=400) 9g.5: { 1qm*#4x processErrorCode(responseCode); 9;L8%T
( return -2; //-2 represent access is error K<5 0>uG } r8[)C cv XK)0Mt\ lB8gD String sHeader; NK:! U eax"AmO Yn0iu$;n for(int i=1;;i++) :-(qqC: { %c8@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +jKu^f6 //Utility.log(in.readLine()); PSyUC#; sHeader=httpConnection.getHeaderFieldKey(i); rfr]bq5 if(sHeader!=null) 9w=[}<E { k]2_vk^ if(sHeader.equals("Content-Length")) MN:LL
< { E Q:6R|L nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 'q@vTM'- break; rD9:4W`^ } |.-Muv } vskp1 Wi( else upZf&4 I8 break; zw iS%-F } <|w(Sn } d"Zyc(Jk catch(IOException e){e.printStackTrace ();} c:
(nlYZ catch(Exception e){e.printStackTrace ();} #]Jg> }d5~w[ %8d]JQ Utility.log(nFileLength); r@
! H?V
b 6)>otB8)J return nFileLength; ofPv?_@ } y!
QYdf? ,R-aO= % s=556 //保存下载信息(文件指针位置) Py?Q:: private void write_nPos() iJCv+p_f { jvo^I$|2h try{ U"~W3vwJ output = new DataOutputStream(new FileOutputStream(tmpFile)); jX^_(Kg output.writeInt(nStartPos.length); QbY@{"" ` for(int i=0;i<nStartPos.length;i++) FPM l;0{ { Iv*u#]{t // output.writeLong(nPos); wz BI<0]z output.writeLong(fileSplitterFetch.nStartPos); QGE0pWL-a output.writeLong(fileSplitterFetch.nEndPos); 8# x7q>? } Iyb_5 UmpF output.close(); Sl@Ucc31 } O=^/58(m catch(IOException e){e.printStackTrace ();} Jb-.x_Bf catch(Exception e){e.printStackTrace ();} >2X-98, } IaU%L6Q] &
x_
#zN] #7/39zTK //读取保存的下载信息(文件指针位置) cH+ ~|3 private void read_nPos() hML-zZ { 0Q)YZ2 try{ k|U2Mp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H6U5- int nCount = input.readInt(); yhs:.h nStartPos = new long[nCount]; OB*V4Yv nEndPos = new long[nCount]; {<?8Y for(int i=0;i<nStartPos.length;i++) .N`*jT { T)',}= nStartPos = input.readLong(); Ba**S8{/` nEndPos = input.readLong(); :\y' ?d- Q } JV_VM{w{K input.close(); f[ia0w5 m }
T;V!>W37 catch(IOException e){e.printStackTrace ();} DgY
!)cS catch(Exception e){e.printStackTrace ();} |"+Ufw^ } `3@?)xa l,zhBnD h[Uo6` private void processErrorCode(int nErrorCode) <1
;pyw
y { *N"CV={No System.err.println("Error Code : " + nErrorCode); n=|% H'U } C7DwA/$D <XN=v!2; NCl@C$W9q //停止文件下载 d`~~Ww1 public void siteStop() 5}c8v2R:B { bvZ:5M bStop = true; c] t@3 m for(int i=0;i<nStartPos.length;i++) h_SkX@"/- fileSplitterFetch.splitterStop(); II!~"-WH =G"ney2 K9y~
e } TPak,h(1 } ww #kc!' //负责部分文件的抓取 C\B4Uu6q **FileSplitterFetch.java j-.Y!$a%6 */ |qz%6w= package NetFox; f8`dJ5i n9n)eI)R GR4DxlX import java.io.*; ZY@ntV? import java.net.*; P(/eVD#v sx}S,aIU !&NrbiuN public class FileSplitterFetch extends Thread { `uH7~ r^ euVj,m kX8NRPW String sURL; //File URL iq[IZdza long nStartPos; //File Snippet Start Position xc\zRsY` long nEndPos; //File Snippet End Position d325Cw? int nThreadID; //Thread's ID vm'Z A7f6 boolean bDownOver = false; //Downing is over D/GE-lq boolean bStop = false; //Stop identical RBBmGZ FileAccessI fileAccessI = null; //File Access interface >k/cm3 U4<c![Pp. >?rMMR+A public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException F=e-jKogK {
v+8Ybq this.sURL = sURL; h9#)Eo this.nStartPos = nStart; z^z`{B this.nEndPos = nEnd; /,UnT(/k( nThreadID = id; P.QF9% fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~QDM
.5 } Hmt2~>FI[ MU(I#Prpe -; J6S public void run() #sDb611}# { qmt9J?$k while(nStartPos < nEndPos && !bStop) v(!:HK0oeT { YRFz] }a.j~>rq zn7)>cQ905 try{ bI8uw|c URL url = new URL(sURL); 7 )rL<+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0H]{,mVs httpConnection.setRequestProperty("User-Agent","NetFox"); a@d 15CN String sProperty = "bytes="+nStartPos+"-"; 9dBxCdpu httpConnection.setRequestProperty("RANGE",sProperty); ,&qC
R
sw Utility.log(sProperty); eZN"t~\rX "H<us?r{ k)|.< InputStream input = httpConnection.getInputStream(); PMV,*`"9"A //logResponseHead(httpConnection); RtzSe$O PP>6 nw0#gDI| byte[] b = new byte[1024]; $LFL4Q int nRead; %yu =,J j while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $Ery&rX. { ovBmo2W/ nStartPos += fileAccessI.write(b,0,nRead); xLDD;Qm, //if(nThreadID == 1) g\
vT7x // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r$}C<a[U } q$mc{F($D upL3M` I
"~.p=' Utility.log("Thread " + nThreadID + " is over!"); G3%Ju= bDownOver = true; _]pu"hZz4 //nPos = fileAccessI.write (b,0,nRead); P(TBFu } XclTyUGoK+ catch(Exception e){e.printStackTrace ();} ;}"Eqq: } aR/?YKA } \r[u>7I IT&,?u% %S}uCqcAK //打印回应的头信息 6/Xs}[iJ public void logResponseHead(HttpURLConnection con) ,3y9yJQa*# { Z>Mv$F"p: for(int i=1;;i++) UNff&E- { |=m.eU String header=con.getHeaderFieldKey(i); 9S*"={}% if(header!=null) _gI1rXI //responseHeaders.put(header,httpConnection.getHeaderField(header)); C5,fX-2Q Utility.log(header+" : "+con.getHeaderField(header)); \'4~@ else bAGKi. break; G9 O6Fi } ow.!4kx{ d } *^~
=/: tmooS7\a gtZmBe= public void splitterStop() 4]ni-u0* { E<[
s+iX bStop = true; }|Mwv
$` } *_o(~5w-K kzDN(_<1 HdJ g } e12QYoh ,_I
rE I/MY4?(T /* bYnq,JRA **FileAccess.java $2?AJ/2r$b *//文件访问(定位,写) 0!_?\)X package NetFox; #e|o"R;/` import java.io.*; 2 HEU dD=$$(
je DfD
>hf/ public class FileAccessI implements Serializable{ 2!Dz9m3 E,}{ iqAb //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 nQjpJ
/= RandomAccessFile oSavedFile; '\tI| long nPos; cR/Nl pX jTvcKm|q %+N]$Q public FileAccessI() throws IOException !m+Pd.4TaB { >|E]??v this("",0); 5M0Q'"`F: } L(VFzPkY% bOFzq>k_ 7v ZD public FileAccessI(String sName,long nPos) throws IOException
D}98ZKi { 30!DraW8 oSavedFile = new RandomAccessFile(sName,"rw"); (WyNO QO' this.nPos = nPos; e~N&?^M oSavedFile.seek(nPos); -AdDPWn } /I=|;FGq
X8$Mzeq 5@w6pda public synchronized int write(byte[] b,int nStart,int nLen) &*=!B9OBI { U]=yCEb8p int n = -1; z'EQdQ) try{ %N*[{j= ^ oSavedFile.write(b,nStart,nLen); i[!|0U`p n = nLen; J rx^ }
,Vhve'=*2 catch(IOException e) u
]e-IYH { &Q883A
J e.printStackTrace (); w\bwa!3Y } N}?|ik GfE>?mG d:(Ex^^ return n; L,[Q/$S8 } ny5P*yWEh [iub}e0 5H0qMt P } @:C)^f" :>0ywg pAE
(i7 /* yV(#z2| **SiteInfoBean.java &<VU}c^! */ gwoe1:F:J package NetFox; *#T:
_ S hI1f .~f )4'T 9 public class SiteInfoBean { R^l0Bu]X (p-q>@m Kjd3!%4mB private String sSiteURL; //Site's URL Qr$'Q7 private String sFilePath; //Saved File's Path e*7O!Z=O private String sFileName; //Saved File's Name vB8$Qx\J private int nSplitter; //Count of Splited Downloading File ,|A^ <R` SGWb*grt \,Y
.5 ? public SiteInfoBean()
8G:/f3B= {//nSplitter的缺省值为5 msBoInhI //default value of nSplitter is 5 MzIDeZ this("","","",5); EN!C5/M{& } 41X`. qVC+q8 E>bkEm public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5whW>T { pU7;!u:c4% sSiteURL= sURL; v`A)GnNiN sFilePath = sPath; |OH*c3~r sFileName = sName; rmX*s}B this.nSplitter = nSpiltter; Hd~g\ }dkXRce* Y)sB]!hx } )p\`H;7*V4 {A0jkU YEu+kBlcQ public String getSSiteURL() os/h~,= { fsL9d} return sSiteURL; @+b$43^ } Msqqjhoy 9\Jc7[b ]-\68b N public void setSSiteURL(String value) 4z<c8
E8 { xMjhC;i{ sSiteURL = value; ]Dq6XR } !85bpQ. b Hr^_ogN cp`Jep<T public String getSFilePath() $${I[2R) { Z@zo~*o return sFilePath; v"k ?e } ^*ZaqMA :uCwWv "\o#YC public void setSFilePath(String value) w6vbYPCN { KuJ)alD;1 sFilePath = value; }4C_r'd6 }
S_P&Fv <=.6Z*x+ <2pp6je\0s public String getSFileName() 6Z_V,LD9L { ]Y[N=G return sFileName; :nIMZRJ_!E } h#YO;m2wd RTmp$lV !n-Sh<8 public void setSFileName(String value) KhR3$|fH< { ",/6bs#$ sFileName = value; 4S26TgY } )L b` 4B F$t]JM k4q":}M public int getNSplitter() @[r[l#4yUi { Ey=2zo^F return nSplitter; f;'*(( } *u+DAg'& 0D,@^vw bK fpf]qQ
W~7 public void setNSplitter(int nCount) YiZk|K_ { m9[ 7"I nSplitter = nCount; nah?V"
?Y } ,WyEwc] } IW\^-LI. _[6sr7H! 3 yx[*'e$ /* ljbAfd **Utility.java 1V2]@VQF */ |=q~X}DA package NetFox; M(C">L]8 );!ND% \TP$2i%W public class Utility { 7i" b\{5 V(`]hH0;T _#{ *I(l public Utility() ~R|9|k { Tt: (l/1 2;Z
0pPR& r?DCR\Jq } 'l'3&.{Yfk :ts3_-cr //线程睡眠 xT>9ZZcE public static void sleep(int nSecond) V|YQhd0kv { 89M'klZ try{ Q/|.=:~FO Thread.sleep(nSecond); ZUI6VM } Htgo=7!?\3 catch(Exception e) YrL(4 Nt8 { UBL{3s^" e.printStackTrace (); Z1fY' f } ()aCE^C } U`6|K$@ e=&~6bs1U //日志 ~xqiasE#K public static void log(String sMsg) &PJ;B)b { !.UE} ^TV System.err.println(sMsg); $`lWW6>P } |^1g*fy? qm_l#
u6 }# s{." public static void log(int sMsg) Rw'}>?k] { 8&EJ.CQ System.err.println(sMsg); 3k'Bje?9~ } sywuS } y`oj\ (u tP@d^ z|Y54o3 /* =w3A{h"^ **TestMethod.java ^iONC&r */ ]njNSn package NetFox; IR${a) aL:|Dr3SX D?dBm public class TestMethod { !H\;X`W|~D # `^nmC/F 1@Jp3wW public TestMethod() M-t9M~ { ///xx/weblogic60b2_win.exe ,P9F*;Dj try{ lrJV"H SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Pm%xX~H //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); /0\g!29l< SiteFileFetch fileFetch = new SiteFileFetch(bean); ?kR1T0lKkE fileFetch.start(); 3zB'AG3b } WVR/0l&bU catch(Exception e){e.printStackTrace ();} a{xJ#_/6 qy'-'UlIr K9zr]7;th } tMw65Xei6b U5C]zswL ,\i*vJ#f public static void main(String[] args) X$UK;O { ?3~t%Q` new TestMethod(); CT'4. } "73*0'm } S${%T$> 点击下载更多相关资料
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