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/* ]hE+$sKd **SiteFileFetch.java T5Sg2a1& */ Q"|kW[Sg package NetFox; bug Fl> import java.io.*; P$18Xno{ import java.net.*; ZSPgci W 9Vz[ *el(+ib% public class SiteFileFetch extends Thread { yYToiW * n<?SZ^X{,/ T+WZE SiteInfoBean siteInfoBean = null; //文件信息Bean 5BHOHw D{ long[] nStartPos; //开始位置
dGsS<@G long[] nEndPos; //结束位置 3G%wZ,)C FileSplitterFetch[] fileSplitterFetch; //子线程对象 |'c4er/;# long nFileLength; //文件长度 ?Z Rkn+; boolean bFirst = true; //是否第一次取文件 e(~'pk"mZ boolean bStop = false; //停止标志 :YqQlr\ File tmpFile; //文件下载的临时信息 6!+X.+ DataOutputStream output; //输出到文件的输出流 M_h8#7 {G U.RW4df%E //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) VJN/#
public SiteFileFetch(SiteInfoBean bean) throws IOException \ I^nx+l { -4e)N*VVu siteInfoBean = bean; 9K ;k% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4r1<,{gCS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 19F ;oFp if(tmpFile.exists ()) N )zPxQ { CYt jY~ bFirst = false; |
"Jx read_nPos(); j?\$G.Y } gT(th9'+z else JG@L5f { "($Lx nStartPos = new long[bean.getNSplitter()]; 9jO`gWxV8* nEndPos = new long[bean.getNSplitter()]; &_9YLXtMi; } 'u(=eJ@1 [J)/Et 7`IUMYl#~ cgs3qI } -,QKTxwo> E3S%s |5=~(-I>@ public void run() nAo8uWG { d"B@c;dD //获得文件长度 J}Qs"+x //分割文件 s~=KhP~ //实例FileSplitterFetch qr)v'aC3 //启动FileSplitterFetch线程 <.,RBo //等待子线程返回 L#`2.nU try{ EI1W
.V>@ if(bFirst) ]}z'X!v_@ { +65oC x
nFileLength = getFileSize(); t_dcV%= if(nFileLength == -1) ^I X%dzM { n1QEu"~Zj System.err.println("File Length is not known!"); `d7gm;ykp } @B,j;2eb else if(nFileLength == -2) nJFk4v4:2 { .E+OmJwD System.err.println("File is not access!"); "jL1.9%" } u64@"P else #^|| ]g/N { (n=9c%w for(int i=0;i<nStartPos.length;i++) m`hGDp3 { f).*NX nStartPos = (long)(i*(nFileLength/nStartPos.length)); CO-Iar } /8xH$n&xoC for(int i=0;i<nEndPos.length-1;i++) N'I(P9@ { izMYVI?0 nEndPos = nStartPos[i+1]; [34zh="o } 1ZT^)/ G nEndPos[nEndPos.length-1] = nFileLength; ,YjxCp3 } u`'ki7LA } /~40rXH2C Hm>-LOCcl 7\mDBG //启动子线程 JOBz{;:R{ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r5o@+"! for(int i=0;i<nStartPos.length;i++) m_a^RB( { -=>sTMWpr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Hx$.9'Oq\Q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L-#e?Y}$J nStartPos,nEndPos,i); (O$}(Tn Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D =$4/D:; fileSplitterFetch.start(); }@d>, 1DU } pe|X@o // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N83!C=X' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); l+%Fl=Q2em // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4~!Eje! nEndPos = " + nFileLength); LU%#mY // fileSplitterFetch[nPos.length-1].start(); O?CdAnhQc` d]U`?A, YWEYHr;%^? //等待子线程结束
:-z&Y492 //int count = 0; K[kds` //是否结束while循环 a$d:_,\" boolean breakWhile = false; d$pYo)8o({ ^f9>l;Lb 8qn 9| while(!bStop) OY: u',T { Us'Cs+5XcG write_nPos(); 4S tjj!ew Utility.sleep(500); 0; 7#ji
breakWhile = true; Z a!
gbt `19qq] 6
jmrD for(int i=0;i<nStartPos.length;i++) yE#g5V& { kd yAl, if(!fileSplitterFetch.bDownOver) Tr~sieL { a0PE^U breakWhile = false; `M:DZNy, break; 42&v% ;R } <Z},A-\S* } J,??x0GDx, if(breakWhile) +p9-
.YM break; I_ONbJ9] vv+km + }MP>]8Aq //count++; ]Ko^G_Rm
//if(count>4) _BbvhWN&+ // siteStop(); n+2%tW } vDsF-u1 K4:
$= P1MvtI4gm System.err.println("文件下载结束!"); =~&VdPZ } )>V?+L5M catch(Exception e){e.printStackTrace ();} ;+a2\j+ } U9
#w =-w;zx "tUwo(K[ //获得文件长度 hUh+JW public long getFileSize() eTT)P { 5Tedo~v int nFileLength = -1; vwmBUix try{ ++b$E&lYU URL url = new URL(siteInfoBean.getSSiteURL()); |#k@U6`SG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h$>wv` httpConnection.setRequestProperty("User-Agent","NetFox"); PQ$sOK|/ Nar>FR7ut eNbpwne int responseCode=httpConnection.getResponseCode(); 1fH<VgF` if(responseCode>=400) sef]>q { J? .F\`N) processErrorCode(responseCode); L_Q S0_1 return -2; //-2 represent access is error (!3;X"l } Hkege5{ -}P7$|O& ]W/>Ldv String sHeader; 3@_Elu zyFUl% Rb EKP(uw for(int i=1;;i++) \9/RAY_G { a7#?h%wf //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1'JD = //Utility.log(in.readLine()); 0OnV0SIL sHeader=httpConnection.getHeaderFieldKey(i); vQ1 v#Z if(sHeader!=null) nn+_TMu { u#@RM^738d if(sHeader.equals("Content-Length")) {e"dm5 { (5a1P;_Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rQb7?O@- break; ; b*i3*!g } Y%@hbUc}x9 } eVJ^\z:4 else GSi>l,y' break; $=)gpPT } #$E)b:xj } jo9gCP. catch(IOException e){e.printStackTrace ();} lyv4fP catch(Exception e){e.printStackTrace ();} O$D?A2eI ;SY\U7B\ K\u_Ji]k Utility.log(nFileLength); y t5H oy eTbg7"waA ,6{iT,~@8 return nFileLength; rS7)6h7(7 } v-Qmx-N r^1+cwy/7P X!>eiYK) //保存下载信息(文件指针位置) r@kP* private void write_nPos() |ZiC`Nt {
'V
(,.' try{ `\CVV*hP output = new DataOutputStream(new FileOutputStream(tmpFile)); esX)"_xf output.writeInt(nStartPos.length); jQ+sn/ROp for(int i=0;i<nStartPos.length;i++) fQdK]rLj { 4<gb36)|4 // output.writeLong(nPos); Mxl]"?z output.writeLong(fileSplitterFetch.nStartPos); G^;>8r output.writeLong(fileSplitterFetch.nEndPos); 5T?-zFMM } fuMJdAuY7d output.close(); 2VoKr) } _>yoX catch(IOException e){e.printStackTrace ();} f0>!qt catch(Exception e){e.printStackTrace ();} ,r8Tbk]m } F(,UA+$A Iz@)!3h ;j%BK(5 //读取保存的下载信息(文件指针位置) 2=iH$v private void read_nPos() C\*4q8( { ,xfO;yd try{ B*3Y!! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !mMpb/&&S int nCount = input.readInt(); bB}5U@G| nStartPos = new long[nCount]; `5~3G2T nEndPos = new long[nCount];
rsXq- Pq* for(int i=0;i<nStartPos.length;i++) p B;3bc { OI}cs2m nStartPos = input.readLong(); &(N+.T5cp nEndPos = input.readLong(); .@ F]Pht } <RNJ>>0 input.close(); T~:|!` } 4\M.6])_ catch(IOException e){e.printStackTrace ();} EYX$pz(x; catch(Exception e){e.printStackTrace ();} $O)3q
$| } p-SJ6Gg
9 ]#2Y e7+ alq%H}FF private void processErrorCode(int nErrorCode) vVl; | { |r%D\EB System.err.println("Error Code : " + nErrorCode); OEx^3z^ } hC <O`|lF cLVe T :'iYxhM.V //停止文件下载 OTDg5:> public void siteStop() H1n1-!%d { NMOut@ bStop = true; JM- t<. for(int i=0;i<nStartPos.length;i++) \>QF(J [8 fileSplitterFetch.splitterStop(); {gbn/{ 7R!5,Js+ UMl#D>:C< } NKb1LbnZ*y } \*f;X aa //负责部分文件的抓取 e[_m<e **FileSplitterFetch.java qMt++*Ls */ R:Q0=PzDi# package NetFox; L2Pujk uvP2Wgt YjOs}TD lx import java.io.*; Rp7ntI: import java.net.*; rE9I>|tX 5NoI~X= /zDi9W*~1 public class FileSplitterFetch extends Thread { }v:jncp %wcSM~w :+Om]#`Vls String sURL; //File URL } :=Tm]S long nStartPos; //File Snippet Start Position `K~AhlJUQ long nEndPos; //File Snippet End Position 2_vbT!_ int nThreadID; //Thread's ID B33$pUk boolean bDownOver = false; //Downing is over ABE@n%|` boolean bStop = false; //Stop identical :G\<y FileAccessI fileAccessI = null; //File Access interface b2b?hA'k om?-WJI |sRipWh public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException )q7UxzE+ { m<FOu<y this.sURL = sURL; 8#!i[UFdj this.nStartPos = nStart; 5%sE]Y# this.nEndPos = nEnd; xk&Jl#v nThreadID = id; {:@tQdM:i8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 B#/Q'V } ;4N;D ;q N+^;,2 *HEuorl public void run() >D201&*G% { ok|qyN+ while(nStartPos < nEndPos && !bStop) V,rq0xW { 3gd&i OO[F E3F -'~LjA( try{ b#7{{@H URL url = new URL(sURL); S26MDLk`R3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~/.7l8) httpConnection.setRequestProperty("User-Agent","NetFox"); Vz6Qxd{m3 String sProperty = "bytes="+nStartPos+"-"; aaD;jxT&M| httpConnection.setRequestProperty("RANGE",sProperty); UG=K|OXWJ Utility.log(sProperty); "Ph^BUAb Sb~MQ_ #>Zzf InputStream input = httpConnection.getInputStream(); `{qG1 //logResponseHead(httpConnection); [JF150zr g=I8@m )iFJz/n> byte[] b = new byte[1024]; /cU<hApK int nRead; Um&(&?Xf while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =s<( P1|" { HRB<Y
mP@ nStartPos += fileAccessI.write(b,0,nRead); "
Hd|7F'u= //if(nThreadID == 1) s%<eD // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [l,Ei? } 3}e%[AKh ai0XL}!+ &x3VCsC\| Utility.log("Thread " + nThreadID + " is over!"); w^t/9Nasi bDownOver = true; :9k Ty: //nPos = fileAccessI.write (b,0,nRead); _a1x\,R|DB } O{#=d catch(Exception e){e.printStackTrace ();} s6>ZREf#J } =:~R=/ZXk } KEWTBBg 5LOo8xN ,cNLkoN //打印回应的头信息 KZ/=IP= public void logResponseHead(HttpURLConnection con) K'GBMnjD { /~3r;M for(int i=1;;i++) H)n9O/u { aA,!<^&} String header=con.getHeaderFieldKey(i); K.0:C`C if(header!=null) Hw4%uS==V //responseHeaders.put(header,httpConnection.getHeaderField(header)); M3q|l7|9 Utility.log(header+" : "+con.getHeaderField(header)); x)@G;nZ else w!D|]LoE break; 6fw(T.Pe } DY`kx2e! } kBffF@{
d@qsdYu-* *6VF
$/rP public void splitterStop() fZoHf\B]{ { jbAx;Xt'=M bStop = true; OynXkH]0T+ } <[-nF"Q pS:4CNI{ o,)?!{k} } ;5)P6S.D ]?(-[ B8}Nvz
/ /* %rv7Jy **FileAccess.java t;}:waZD *//文件访问(定位,写) `7r@a package NetFox; yPal<c import java.io.*; 3qf
Ym}d r [*Vqcz 0.@&_XTPl public class FileAccessI implements Serializable{ "/wyZ h-[VH% //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $69oV: RandomAccessFile oSavedFile; =o$sxb
E( long nPos; y]f"@9G# 2I,^YWR 9J2NH|]c public FileAccessI() throws IOException W>j !Q^? { M
r5v< this("",0); c_4[e5z } a m|F?|1 JPoN&BTCj ~=uWD&5B4 public FileAccessI(String sName,long nPos) throws IOException ,Vt/(x- { $}!p+$ oSavedFile = new RandomAccessFile(sName,"rw"); vzim<;i this.nPos = nPos; E2Q[ZoVS oSavedFile.seek(nPos); !1$])VQWI } 4b98KsYg $\X[@E S0 sT}.v* public synchronized int write(byte[] b,int nStart,int nLen) rustMs2p { Z$/xy" int n = -1; o!kbK#k try{ CEX"D` oSavedFile.write(b,nStart,nLen); t.xxSU5~% n = nLen; AP'*Nh@Ik( } I|^;B8[ catch(IOException e) B><d9d { iKX-myCz e.printStackTrace (); ]&lY%"U$i } _./Sk|C )b)-ZS7 xc=b
|:A return n; ^")Q YE } lh7jux Nn!+,;ut W*Zkc:{eB } DH\0z[ : y%d g/CSGIIT /* S[PE$tYT#t **SiteInfoBean.java 0jy2H2 */ >0ow7Uw; package NetFox; VY
| _dk t*Sa@$p I ?gSG*m public class SiteInfoBean { (nf~x Z2qW\E^_r /5(Yy} private String sSiteURL; //Site's URL %A1o.{H private String sFilePath; //Saved File's Path TO]@
Zu1 private String sFileName; //Saved File's Name ~*z% e*EL private int nSplitter; //Count of Splited Downloading File RtTJ5@V( |$8~?7Jv c;Pe/ d public SiteInfoBean() 7z JRJ*NB {//nSplitter的缺省值为5 ^c- //default value of nSplitter is 5 (l^3Z3zf& this("","","",5); ,,%i; } <m)$K D$
dfNiCH Xg|B \\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J:CXW%\ <q { HK,cJahq sSiteURL= sURL; s4A43i'g!h sFilePath = sPath; *>7 >g" sFileName = sName; m% -g ~q this.nSplitter = nSpiltter; f$e[u
Er 7puFz4+f ObVGV } CZud&
< \2N!:%k 2@'oe7E public String getSSiteURL() v$7QIl_/7 { Mm.<r-b return sSiteURL; _aGOb;h } WA)yfo0A l? Udn0F vK|E>nL public void setSSiteURL(String value) 8@i7pBl@ { $WyD^|~SF sSiteURL = value; Qu?R8+"KS } %7zuQ \w _}lZ,L(w qE&v ; public String getSFilePath() YVQN&|- { PRu 6xsyA return sFilePath; .7e2YI,S } JD)(oK%C <*16(!k0 tItX y public void setSFilePath(String value) [I'0,y { nw -xSS{ sFilePath = value; _<k\FU
r } dgR
g>)V {MtpkUN 1C}NQ!. public String getSFileName() .k,1f*% { RDW8]=uM return sFileName; ciBP7>':: } h`KFL/fT hn5h\M? Zn&,
t &z public void setSFileName(String value) Sg&UagBj { ^o^H3m sFileName = value; >80;8\ } HW3 }uP\c
)j9SGLo hL/)|N~ public int getNSplitter() xSktg]u Se { m+`fn;* return nSplitter; w~(1%p/ } .L9j>iP9 * 7mI:|G D^yRaP*|7 public void setNSplitter(int nCount) =5J7Hw&K { e<3K;Q nSplitter = nCount; aC$B2 } aZ2!i } RN$1bxY /1"(cQ%? {G U&a /* |jI#"LbF **Utility.java 3LAIl913 */ o<|cA5f\ package NetFox; I8wXuIN_ {@eJtF+2 l)G^cSHF.3 public class Utility { >p)MawT] l1T m`7} 7E!IF>` public Utility() >6NRi /[ { $G8E 3|k S{]x SX<` {x&L } iP
=V8g?L +MR.>" //线程睡眠 8$")%_1] public static void sleep(int nSecond) 9!6f-K { j/R[<47 try{ Ja,wfRq Thread.sleep(nSecond); s3~lT. } &M46&^Jho catch(Exception e) pOGeruu? { v=0(~<7B e.printStackTrace (); GR&z, } .:@Ykdm4I } d ^^bke$~ GGNvu)" //日志 Bzkoo J public static void log(String sMsg) 8K.R= { aoTM System.err.println(sMsg); dYT% } >pU$wq|i ^Y=\#-Dd J3e96t~u public static void log(int sMsg) Wi*.TWz3 { Gr7=:+0n|P System.err.println(sMsg); e5* ni/P } S]bmS6# } -K
q5i \#f<!R4 kjg~n9#T /* 4 8:>NW **TestMethod.java wLi4G@jJ */ 3 jGWkby0 package NetFox; )k\H@Dy%$ +1uF !G&l KV}FZ3jY public class TestMethod { qs1 ?IYD 4A8;tU$& G'oG</A public TestMethod() N/Z2hn/m { ///xx/weblogic60b2_win.exe YUx.BZf7 try{ 419x+3>} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]^Qn //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !F1M(zFD SiteFileFetch fileFetch = new SiteFileFetch(bean); R@/"B8H fileFetch.start(); 5 xppKt } 6N",-c catch(Exception e){e.printStackTrace ();} 43|XSyS -7*ET3NSI/ v/](yT } [Yo,*,y31 brW :C?} 3?c3<`TW public static void main(String[] args) ZX>AE3wk { S4' new TestMethod(); T;L>;E>B } (MR_^t } zfc'=ODX 点击下载更多相关资料
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