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/* -XuRQ_)nG **SiteFileFetch.java qwf97pg$ */ G6*P]< package NetFox; /Soc,PjZ import java.io.*; Bz7rf^H`Z import java.net.*; G@.TE7a2Z bi:TX<K+ Ne!0 `^`~ public class SiteFileFetch extends Thread { 6}q8%[l| 6ct'O**k*& 'MWu2L!F SiteInfoBean siteInfoBean = null; //文件信息Bean XWuHH;~*L long[] nStartPos; //开始位置 VLL CdZ% long[] nEndPos; //结束位置 w!GPPW( FileSplitterFetch[] fileSplitterFetch; //子线程对象 )qbjX{GZ7 long nFileLength; //文件长度 -gq,^j5, boolean bFirst = true; //是否第一次取文件 |(evDS5 boolean bStop = false; //停止标志 ?QbxC,& i File tmpFile; //文件下载的临时信息 per$%;5E" DataOutputStream output; //输出到文件的输出流 k Q
Sx65 R&vV!d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @Yu=65h public SiteFileFetch(SiteInfoBean bean) throws IOException >GV(\In { p-qt?A siteInfoBean = bean; mFGiysM //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^yl)c
\` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); z\kiYQ6kA if(tmpFile.exists ()) e H0^d5bH { p?6`mH bFirst = false; EFk9G2@_ read_nPos(); )XFaVkQ} } I1Jhvyd?$ else 6Fe$'TP {
<< XWL: nStartPos = new long[bean.getNSplitter()]; 9ZYT#h nEndPos = new long[bean.getNSplitter()]; ntZl(] l } Y8s.Q K{vn[} .%x1%TN W Z_yaG$U } 3hD\6,@ 9w"kxAN mS]& public void run() ge[hAI2I { 9f|+LN## //获得文件长度 F<YXkG4pO //分割文件 A0A]#=S //实例FileSplitterFetch =N~*`5|rk //启动FileSplitterFetch线程 }w|a^=HAp //等待子线程返回 }%}yOLo: try{ S.! n35 if(bFirst) W }"n* { 0W6jF5T nFileLength = getFileSize(); 5ltrr(MeD if(nFileLength == -1) wk@S+Q { 0Mo?9?? System.err.println("File Length is not known!"); }2!=1|} } JtbwY@R else if(nFileLength == -2) <rbzsn"a { \'>ZU-V System.err.println("File is not access!"); @5,Xr`] } qOD:+b else R2Y.s^ { -~rZ| W~v for(int i=0;i<nStartPos.length;i++) 5
A2u|UU { !5VT[w
1 nStartPos = (long)(i*(nFileLength/nStartPos.length)); IE0hC\C} } [AA*B for(int i=0;i<nEndPos.length-1;i++) cvk$ I"q+ { ?]]7PEee* nEndPos = nStartPos[i+1]; 0;/},B[A } -|WQs'%O nEndPos[nEndPos.length-1] = nFileLength; '[ zy%<2sL } VZ1u/O?ub } fgW>~m.W Yp@i{$IUW `iQ9 9 //启动子线程 [+2iwfD fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M/LC:, for(int i=0;i<nStartPos.length;i++) Zk*!,, P! { 1(`UzC=R| fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Pe`eF(J siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), M\!z='Fi nStartPos,nEndPos,i); ibqJ'@{=e Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1$toowb"Zy fileSplitterFetch.start(); :H8`z8=0f{ } )r`F}_CEL // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p3W-*lE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); |qq7vx
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Js0h lWu nEndPos = " + nFileLength); "74Rn"d5 // fileSplitterFetch[nPos.length-1].start(); 3o.9}`/ @ r G=>??k @@pI>~#zh //等待子线程结束 =hq+9 R8= //int count = 0; #k/NS //是否结束while循环 [:"7B&&A boolean breakWhile = false; S uo XR@C^d {IG5qi?/E) while(!bStop) 1c19$KHu { 8;q2W
F{AX write_nPos(); C9Xj)5k@R Utility.sleep(500); 6 66f;h breakWhile = true; +hL%8CVU M =*'K'e>P3 zv>7;En3 for(int i=0;i<nStartPos.length;i++) Pgo^$xn'6 { V
3yt{3Or if(!fileSplitterFetch.bDownOver) FI=]K8 { (;T g1$ breakWhile = false; o"Mhwh break; o4Hp|iK&0 } Uf`~0=w } 4cQ|"sOzD if(breakWhile)
]R%+ break; fKkH
[ d'UCPg<Y Cj3C%W //count++; >sl#2,br //if(count>4) -+,3aK<[ // siteStop(); Jd-u? } \ Q E?.Fx :@c\a99Kx *L+)R*|:& System.err.println("文件下载结束!"); k=``Avp? } =1e>$E# catch(Exception e){e.printStackTrace ();} $^ZugD } 9yWQ}h >j}.~$6dj_ m6iQB\ \ //获得文件长度 =ec"G2$?" public long getFileSize() |x/00XhS { uh
3yiDj@a int nFileLength = -1; |4?O4QN try{ M.h8Kr!. URL url = new URL(siteInfoBean.getSSiteURL()); w^N3Ma HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); s;!Tz) httpConnection.setRequestProperty("User-Agent","NetFox"); T$vDw|KSVP M_Z(+k{Gy %D
$+Z( int responseCode=httpConnection.getResponseCode(); %[J|n~8_Z if(responseCode>=400) /AhN$)(O { Api<q2@R processErrorCode(responseCode); /gUD!@ return -2; //-2 represent access is error T/Fj0' } {6Qd,CX ! 1wf/C;= I]vCra String sHeader; (n
{,R :o=a@Rqx TW)~&;1l for(int i=1;;i++) kD{qW=Lpn { _=ziw|zI //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); w\(;>e@ //Utility.log(in.readLine()); Xn3
\a81 sHeader=httpConnection.getHeaderFieldKey(i); ,HHCgN
if(sHeader!=null) KXvBJA$ { ,3p$Z if(sHeader.equals("Content-Length")) s$PPJJT{b { XPd@>2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); r.#"he_6!. break; \95O } Qs1e0LwA9 } lq*{2M{[ else EI!e0V1! break; f.Feo } 8-uRn38 } Y>i5ubR~ catch(IOException e){e.printStackTrace ();} b@?pofZ`k catch(Exception e){e.printStackTrace ();} vzPuk|q3 z(JDLd eA'1 Utility.log(nFileLength); p"k[ac{ tShyG!b dp~] Wx return nFileLength; Uh=@8v } zM+eb| >cr '%\FT-{ p"ElO,\ //保存下载信息(文件指针位置) '3eL^Aq private void write_nPos() Z&[_8Y5j { ;fl3'.S[ try{ 2uy<wJE> output = new DataOutputStream(new FileOutputStream(tmpFile)); ocDAg<wo output.writeInt(nStartPos.length); ]46#u=y~3 for(int i=0;i<nStartPos.length;i++) k<i#agq { LktH*ePO // output.writeLong(nPos); ccm(r~lhJ output.writeLong(fileSplitterFetch.nStartPos); s?pd&_kOv3 output.writeLong(fileSplitterFetch.nEndPos); KV { J>J1 } l0G sY.~, output.close(); :$5$H } 1$1[6
\3v catch(IOException e){e.printStackTrace ();} 22_%u=p-| catch(Exception e){e.printStackTrace ();} hUO&rov3@ } +:jx{*}jo 3Lw&HtH GT3?)g{Z //读取保存的下载信息(文件指针位置) 4ht+u private void read_nPos()
RI</T3%~ { +q-/~G' try{ K]s*rPT/, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ,"U_oa3 int nCount = input.readInt(); ?D8+wj nStartPos = new long[nCount]; 5*P+c(= nEndPos = new long[nCount]; w_hN2eYo&e for(int i=0;i<nStartPos.length;i++) [t }\8^y { " _{o}8L nStartPos = input.readLong(); OD~B2MpM> nEndPos = input.readLong(); x!RpRq9 } SE;Yb' input.close(); 2?./S)x) } || 0n%"h>i catch(IOException e){e.printStackTrace ();} <yw(7 catch(Exception e){e.printStackTrace ();} K|^'`FpPO } /@qnEP% 5kbbeO|0G U,e'vS{ private void processErrorCode(int nErrorCode) _dk/SWb) { iB0#Z_ System.err.println("Error Code : " + nErrorCode); M*n@djL$\~ } _&xi})E^O] lU&[){ 66 @#V //停止文件下载 I`-N]sf^ public void siteStop() @&fAR2 { ?Q#yf8 bStop = true;
roNRbA] for(int i=0;i<nStartPos.length;i++) j,@@[{tu fileSplitterFetch.splitterStop(); LUN"p#1 -Mx\W|YK wu53e= / } YOE!+MiO } GX-V|hLaGX //负责部分文件的抓取 oTLA&dy@ **FileSplitterFetch.java o{r<=X ysM */ RW I7eC package NetFox; #ssSs]zl jS<(Oo %f'mW2 import java.io.*; (]gd$BgD import java.net.*; :+*q,lX8 TVs#, 3I):W9$Qp public class FileSplitterFetch extends Thread { eF=cMC
XMpa87\ & cV$`L String sURL; //File URL n4%ZR~9WH long nStartPos; //File Snippet Start Position kACgP!~/1 long nEndPos; //File Snippet End Position ~>-MVp int nThreadID; //Thread's ID %!X9>i> boolean bDownOver = false; //Downing is over 6zR9(c:a~ boolean bStop = false; //Stop identical P~d&PhOe FileAccessI fileAccessI = null; //File Access interface x4=Sm0Ro|V hw9qnSeRy 'h.:-1# L public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException su\iUi { ;%W]b this.sURL = sURL; YkuFt>U9, this.nStartPos = nStart; 7G]v(ay this.nEndPos = nEnd; vnr{Ekg nThreadID = id; 9Q/t+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 qr<RMs } kVeR{i<*( jRGslak; XV %DhR= public void run() |9'`;4W { kfj)`x while(nStartPos < nEndPos && !bStop) z}z 6Vg { dgp1 B\ orON)Sks qSA]61U& try{ l.nd Wv URL url = new URL(sURL); o7i>D6^^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5x? YFq6k httpConnection.setRequestProperty("User-Agent","NetFox"); /?*GJN#
String sProperty = "bytes="+nStartPos+"-"; w_ONy9 httpConnection.setRequestProperty("RANGE",sProperty);
bo|3sN+D Utility.log(sProperty); w]O[{3" 1Xn:B_pP ` G-V
% InputStream input = httpConnection.getInputStream(); >h3m/aeNC //logResponseHead(httpConnection); scQnL'\ '^!#*O A29R5 byte[] b = new byte[1024]; #UesXv int nRead; &m=73RN while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "zZZ h { bGtS! 'I nStartPos += fileAccessI.write(b,0,nRead); 6Q*Zy[= //if(nThreadID == 1) *YO^+]nmY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); sD ,=_q@ } -\[H>)z]RB QCAoL.v aDZ,9} Utility.log("Thread " + nThreadID + " is over!"); @i <vlHpl bDownOver = true; FKBI.}A?!' //nPos = fileAccessI.write (b,0,nRead); PrqyJ } z; Jz^m- catch(Exception e){e.printStackTrace ();} 9y+0Zj+. } 38E
%]*5F } ;_p$5GVR| L.?QZN%cN ISHzlEY //打印回应的头信息 fW=vN0Z public void logResponseHead(HttpURLConnection con) c]%~X&Tg` { w<&R|= 93 for(int i=1;;i++) %EH{p@nM&- { ~YRG9TK String header=con.getHeaderFieldKey(i); oH='\M%+ if(header!=null) zQ~ax!}R //responseHeaders.put(header,httpConnection.getHeaderField(header)); Ms
3Sri Utility.log(header+" : "+con.getHeaderField(header)); u*=8s5Q[ else 572{DC&T break; [nASMKK0 } 'W*:9wah } l0w<NZF ^_gH}~l+U e);`hNLih public void splitterStop() Z^!%
b { Fs(FI\^ bStop = true; 0fzHEL } y|/[; 1I?`3N 2h:{6Gq8 } D/YMovH% i_e%HG Dv"HFQuF /* Marx=cNj **FileAccess.java UQ#t & *//文件访问(定位,写) GIZw/L7Yb package NetFox; +L|x^B3 import java.io.*; b/"gUYo ub;:"ns} C2{*m{
D public class FileAccessI implements Serializable{ %uw7sGz\ \q@Co42n\ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0bG#'.- RandomAccessFile oSavedFile; 7!dj&? long nPos; m6uFmU*<M} k8c(|/7d o~7D=d?R public FileAccessI() throws IOException Tq?7-_MLC$ { 5=#2@qp this("",0); .*edaDi } +ib&6IU (q@%eor&} hg2Ywzfm- public FileAccessI(String sName,long nPos) throws IOException [}HS[($ { ik#ti=. oSavedFile = new RandomAccessFile(sName,"rw"); fjCFJ_ this.nPos = nPos; d$^@$E2f oSavedFile.seek(nPos); y*
:C~ } U@9v(TfV &F:%y(;{Y 2HO2 public synchronized int write(byte[] b,int nStart,int nLen) I?RUVs { I?
="Er[g} int n = -1; iG#92e4 try{ ,FwpHs $A oSavedFile.write(b,nStart,nLen); fV2w &:^3 n = nLen; Eh^gR`I } RN&6z"|jR catch(IOException e) EM(%|# { /dO*t4$ @? e.printStackTrace (); @/,0()* dL } zs6rd83# PeIKx$$Kl{ IrUoAQ2xpG return n; V?)YQB } eX1_=?$1P +|Izjx]ZV d_!}9 } 8DX5bB 7 0PGbAD +/
{lz8^, /* Cp+tcrd_s **SiteInfoBean.java ;l^'g}dQ^ */ A'$>~Ev package NetFox; znDpg{U( Jd~M q9( h^v#?3.@ public class SiteInfoBean { Ii#+JY0k l$[,V:N u{7->[= private String sSiteURL; //Site's URL 0"Euf41 private String sFilePath; //Saved File's Path Kn1T2WSAg private String sFileName; //Saved File's Name $&!|G-0' private int nSplitter; //Count of Splited Downloading File ^q`RaX) hYh~%^0dt K:A:3~I!NW public SiteInfoBean() M)U)Sc zHO {//nSplitter的缺省值为5 \GV'{W+o2 //default value of nSplitter is 5 Ls+vWfF=# this("","","",5); ej7L-~lxQ } zK I1 R#i`H(N 2a;[2': public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ZvLI~ul(zT { 'v@*xF/L6a sSiteURL= sURL; bc:3 5. sFilePath = sPath; /EJy?TON* sFileName = sName; !x\\# 9 this.nSplitter = nSpiltter; .s?^y+e_ :sw@1 ;.<HpDfG_ } ZmycK:f uH(M@7"6_! |Qb@. public String getSSiteURL() \%9QE { E^A!k=> return sSiteURL; +~*e B } I0><IaFy ef!f4u\ H:
;XU public void setSSiteURL(String value) $Yp.BE<} { U(Bmffn4Z sSiteURL = value; 2Q7X"ek~[ } fz?woVn :`lP+y?a1 }:u-l3e public String getSFilePath() ?G<?:/CU { |qwx3 hQ? return sFilePath; f@$kK?c? } d'H gek{T |DPq~l(d <>Ha<4A
=E public void setSFilePath(String value) =(Y0wZP| { jW4>WDN: sFilePath = value; 5y] %Cu1.u } MttFB;Tp ]g }5p4*& G{O{
p public String getSFileName() ic4hO>p& { 4@Z!?QzW return sFileName; E$&bl } ks
%arm& r:Q=6j, 3.g 4X?=zd public void setSFileName(String value) $dWYu"2CD { VS!v7-_N5 sFileName = value; I~Qi):&x } c4r9k-w0E 8H T3C\$s OF)*kiJ public int getNSplitter() [Q\(kd*4 { 3xmPY. return nSplitter; D #7q3s } P2 qC[1hYH *cCj*Zr] kY6_n4 public void setNSplitter(int nCount) ]=]MJ3_7 { ykH@kv Qt nSplitter = nCount; xP;>p|
M } &}|`h8JA]K } }f% Qk0^ lDF7~N9J_ g:!R't? /* $9xp@8b\_ **Utility.java e.#,9 */ (d*||" package NetFox; QC&,C}t, WS?Y8~+{5 ?AQA>D#W public class Utility { ts("(zI1E \PFj w9s 2$VSH& public Utility() feeHXKD| { 1'iQlnMO@ g6S-vSX, W7@Vma` } %`\Qtsape #JY> //线程睡眠 "3|OB, <;: public static void sleep(int nSecond) -j:yE Z4Oy { skTtGz8R[ try{ .7:ecFKk Thread.sleep(nSecond); R9D2cu,{ } 6+"gk( catch(Exception e) -w8?Ur1x: { j~>J?w9<O e.printStackTrace (); R6:m@ } JsMN_%y? } }jU)s{>fb .cx9+; //日志 P"t Dq& public static void log(String sMsg) Snp(&TD<< { ~V?\@R:g System.err.println(sMsg); }<w9Jfr"X } %qqeL tB4yj_ZF qPJSVo public static void log(int sMsg) D0MW~Y6{ { 3H4T*&9;n System.err.println(sMsg); >IA1 \?( } @+)T"5_Y[ } Y?zo") <Lt"e8Z> x rSm#/)4A /* o]&P0 b **TestMethod.java 5Z"N2D)." */ Y%@;\ package NetFox; BQeg-M T!pZj_ h= "A5z!6T{ public class TestMethod { L'"c;FF02i x&m(h1h $(08!U
public TestMethod() mv`b3 $ { ///xx/weblogic60b2_win.exe nPl,qcyY try{ U!RIeC SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %|f@WxNrU //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ~x@V"rxGw SiteFileFetch fileFetch = new SiteFileFetch(bean); F[F
NtZ fileFetch.start(); oR7f3';?6 } Bs>S2] catch(Exception e){e.printStackTrace ();} PlgpH'z4$ f8UO`*O sqjDh } h uR ^l N+H[Y4c?F& *A")A.R public static void main(String[] args) w vI
v+Q9 { ed3wj3@ new TestMethod(); %\)AT" } }g|9P SbJ } / T_v8{D 点击下载更多相关资料
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