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/* +{&++^(}a **SiteFileFetch.java ;<s0~B#9} */ g$9s}\6B package NetFox; KiMEd373- import java.io.*; &}b-aAt import java.net.*; g:[yA{Eh $&FeR*$|g MMyJAGh
^G public class SiteFileFetch extends Thread { \r&9PkHWo Ehg(xK i/q1> SiteInfoBean siteInfoBean = null; //文件信息Bean b^&nr[DC long[] nStartPos; //开始位置 -Z&9pI(3R~ long[] nEndPos; //结束位置 T']G:jkb FileSplitterFetch[] fileSplitterFetch; //子线程对象 I:o.%5) long nFileLength; //文件长度 ^}<h_T?<_- boolean bFirst = true; //是否第一次取文件 l'#a2Pl boolean bStop = false; //停止标志 )C#b83 File tmpFile; //文件下载的临时信息 -<@QR8: DataOutputStream output; //输出到文件的输出流 k`r`ZA(kQ- =o,6iJ^?$m //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Qg
gx: public SiteFileFetch(SiteInfoBean bean) throws IOException +Am\jsq { KOVR=``"/ siteInfoBean = bean; W< :7z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4w(#`'I> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); /\UFJ if(tmpFile.exists ()) ; +R { 7Ezy-x2h bFirst = false; dW"=/UW read_nPos(); 3W"l}.&ZJ" } =LojRY else ]"-c?%L { MI|anM nStartPos = new long[bean.getNSplitter()]; f]]UNS$AYQ nEndPos = new long[bean.getNSplitter()]; OVU+V 0w1a } .L))EB 9\a;75a "tg?V pcO0xrI } oC1Nfc+
^#&:-4/ P^& =L&U public void run() (@;=[5+ { gSXidh}^ //获得文件长度 :B5M#D!dO //分割文件 ^U]B&+m //实例FileSplitterFetch \[W)[mH_ //启动FileSplitterFetch线程 NmZowh$M //等待子线程返回 NVq3h\[X try{ Q*8=^[x if(bFirst) NaYr$` { ;n;bap nFileLength = getFileSize(); Eh/Z4pzT if(nFileLength == -1) eaCh;IpIf { @_C?M5v System.err.println("File Length is not known!"); p2uZ*sY(D } pn-`QB:{h else if(nFileLength == -2) 8;1,saA_9 { !t!\b9= System.err.println("File is not access!"); b[`fQv$G } 2mfKy9QxO else O}mz@-Z { 7':qx}c#!1 for(int i=0;i<nStartPos.length;i++) db5@+_ { )|`|Usn#[ nStartPos = (long)(i*(nFileLength/nStartPos.length)); M
Qlx&.> } db0]D\ for(int i=0;i<nEndPos.length-1;i++) ])H[>.?K { XPsRa[08WK nEndPos = nStartPos[i+1]; .|z8WF* } j55;E
E! nEndPos[nEndPos.length-1] = nFileLength; qCku
q } GR>kxYM%q } IH$ZPux CKr5L Eu1t*>ZL //启动子线程 <X~P62< fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; \O(~:KN for(int i=0;i<nStartPos.length;i++) .<kbYo:MV { PQA}_o fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6PdLJ#LS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xfADks2w nStartPos,nEndPos,i); yHjuT+/wM, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \S[I:fw#& fileSplitterFetch.start(); t @vb3 } P&}J(;Lbl // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mB<*we siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); r`5svY // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", I*hzlE nEndPos = " + nFileLength); VFLW@ // fileSplitterFetch[nPos.length-1].start(); \ICc?8oL y;xY74Nq 8\B]! //等待子线程结束 Gx/kel[Y} //int count = 0; mq6TwM //是否结束while循环
y)GH=@b boolean breakWhile = false; y,cz;2 s?~lMm' ! ]x:>!y while(!bStop) A#KfG1K> { \zM3{{mV/ write_nPos(); K4K]oT Utility.sleep(500); W 2T6JFv breakWhile = true; c=#V*< :oO
?A L wP for(int i=0;i<nStartPos.length;i++) ['jr+gIfQ { x_$`#m{hL5 if(!fileSplitterFetch.bDownOver) Zj5B}[,l\ { pUD(5v*0R breakWhile = false; f S-PM3 break; E)z=85;_p } TAp8x } gOLN7K-) if(breakWhile) jU0E=;1 break; uN+]q qCf "^NsbA+ Q]hl+C$d"/ //count++; g`r4f%O //if(count>4) w:c9Z=KX // siteStop(); i.Z iLDs\7 } (L'|n*Cr Qs\*r@6? $~)YI/b System.err.println("文件下载结束!"); W@FSQ8b>$m } B<\HK:%{ catch(Exception e){e.printStackTrace ();} ^\C Fke= } eI3ZV^_Ps SI,
t:=D rBUWzpE" //获得文件长度 z=yE- I{ public long getFileSize() O
8XHaVLg3 { *~0U4kw+ int nFileLength = -1; l?)!^}Qc try{ @RXkj-,eC# URL url = new URL(siteInfoBean.getSSiteURL()); J^y?nE(j HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ge1b_?L_ httpConnection.setRequestProperty("User-Agent","NetFox"); uZe"M(3r$ d3"QCl E4,
J"T|@ int responseCode=httpConnection.getResponseCode(); M2pFXU?] if(responseCode>=400) &M{;[O{ { L%;[tu(* processErrorCode(responseCode); Fxv5kho return -2; //-2 represent access is error W[<ZI>mf } :JIJ!Xn) 0)rayzv bYBE h n String sHeader; H*HL:o-[ SZ1yy[" bCqTubbx!t for(int i=1;;i++) L30$ { xO&qo8* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -CLBf'a //Utility.log(in.readLine()); c<,R,DR sHeader=httpConnection.getHeaderFieldKey(i); u~7fK if(sHeader!=null) E<sd\~~A: { (\UpJlW if(sHeader.equals("Content-Length")) Y49&EQ { lc\{47LwZ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); aM+Am,n`@ break; qPBOt;N } )kD B*(? } Z rv:uEl else ,ygUy] break; V5' (op / } otX/sg.B* } |u]IOw&1 catch(IOException e){e.printStackTrace ();} xVk5% catch(Exception e){e.printStackTrace ();} Ey=ymf.} <$??Z;6 7n,=`0{r Utility.log(nFileLength); XK&G `cJ[ -2'1KAk-W +{0v@6<(02 return nFileLength; >&ENrvaJ } 0f#xyS 3 {gh<SZsE +kN,OK~ //保存下载信息(文件指针位置) AuT:snCzR private void write_nPos() ]>B4 { 8([ MR try{ +;-ZU output = new DataOutputStream(new FileOutputStream(tmpFile)); zx5#eMD output.writeInt(nStartPos.length); WPAT\Al&AE for(int i=0;i<nStartPos.length;i++) \/64Xv3L0 { vi28u xc // output.writeLong(nPos); ZUkM8M$c output.writeLong(fileSplitterFetch.nStartPos); sI.p(
-KQ output.writeLong(fileSplitterFetch.nEndPos); 0O[le*3b } c
h}wXn output.close(); -lrcb/)Gz } #\
uB!;Q catch(IOException e){e.printStackTrace ();} 4n"6<cO5q catch(Exception e){e.printStackTrace ();} 6-z(34&N } aWPf3Q (D:-p:q. Gt)ij?~ //读取保存的下载信息(文件指针位置) &(lQgi+^! private void read_nPos() F^Bk @ { <HtGp6q try{ @]!9;?so DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @lWYc`>} int nCount = input.readInt(); =3ovaP nStartPos = new long[nCount]; 9khMG$ nEndPos = new long[nCount]; H+Aidsn for(int i=0;i<nStartPos.length;i++) 3"juj' { 5|cRHM# nStartPos = input.readLong(); 'E&tEbY nEndPos = input.readLong(); Zrp-Hv27,, } xS>vmnW input.close(); tW
a'[2L } \~g,;>%7Y catch(IOException e){e.printStackTrace ();} S*gm[ZLQ catch(Exception e){e.printStackTrace ();} 9c%CCZ } Wm}gnNwA \E[6wB>uN% ,Js-'vX private void processErrorCode(int nErrorCode) % m"Qg< { ,,!P-kK$ System.err.println("Error Code : " + nErrorCode); +u&[ j/ } F-$!e?,H s/.P/g%tA> wqi0%Cu* //停止文件下载 cg o public void siteStop() &>B"/z { 8Ihl}aguW bStop = true; J.'%=q(Sb for(int i=0;i<nStartPos.length;i++) ANNVE}, fileSplitterFetch.splitterStop(); fs?H )ki
Gk}2 Eh)VT{vp } l4dG=x}M] } %`QgG //负责部分文件的抓取 Q6wa-Y, **FileSplitterFetch.java zvVo-{6 */ t0GJ$]) package NetFox; hNhEA $X5 {
0-on"o Ctn
4q'Q import java.io.*; z:$ibk4#h import java.net.*; hO&_VCk TEh.?
$8xb|S[ public class FileSplitterFetch extends Thread { p_(En4QSH
rlGv6)vb gO)":!_n W String sURL; //File URL zhm 0J-g long nStartPos; //File Snippet Start Position C JER&"em7 long nEndPos; //File Snippet End Position a+cDH int nThreadID; //Thread's ID $dXx@6fP boolean bDownOver = false; //Downing is over *c [^/ boolean bStop = false; //Stop identical J8i,[,KcE FileAccessI fileAccessI = null; //File Access interface ~\8(+qIv%f d,?Tq KPI96P public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException awwSgy { Gw\..O this.sURL = sURL; ZOMYo] this.nStartPos = nStart; NPrLM5 this.nEndPos = nEnd; EEnl' nThreadID = id; /aMOZ=,q} fileAccessI = new FileAccessI(sName,nStartPos);//定位 aWlIq(dU } EwX{i}j_V w]yVNB amdgb,vh public void run() } ck<R { {?5iK1|}K while(nStartPos < nEndPos && !bStop) * m^\& { vy*-"=J D%nd7
| #CaPj:>[ try{ PkI+z_ URL url = new URL(sURL); v&'#Gg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); q[C?1Kc.z httpConnection.setRequestProperty("User-Agent","NetFox"); 9O:l0
l String sProperty = "bytes="+nStartPos+"-"; #XA`n@2Uoo httpConnection.setRequestProperty("RANGE",sProperty); g27'il Utility.log(sProperty); 9aY8`B {x.0Yh7 nvT@'y+ InputStream input = httpConnection.getInputStream(); 5.oIyC^Ik //logResponseHead(httpConnection); 1kKfFpN |5tZ*$nGa &=BzsBh byte[] b = new byte[1024]; ?q9]H5\ int nRead; [#q]B=JB while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) BhzD V { <y] 67:"<v nStartPos += fileAccessI.write(b,0,nRead); QcW8A ,\q //if(nThreadID == 1) Wz s=BNm9 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); flo$[]`.7 } nAEyL+6U M@{#yEP z__?k Y Utility.log("Thread " + nThreadID + " is over!"); |Z<\k x bDownOver = true; n)98NSVDbT //nPos = fileAccessI.write (b,0,nRead); ,`Y$}"M4 } "mf$E| catch(Exception e){e.printStackTrace ();} jt on \9 } ESIP+ } U`i5B;k}- +q'1P}e xNf}f 9l //打印回应的头信息 NFZ(*v1U public void logResponseHead(HttpURLConnection con) j*G: 8Lg { {]<c6*gQ for(int i=1;;i++) \agZD+ { T5."3i String header=con.getHeaderFieldKey(i); 1.F&gP)9 if(header!=null) rBNVI;JZW //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8ROKfPj;z Utility.log(header+" : "+con.getHeaderField(header)); p8_^6wfg else ]*\MIz{56' break; tLTavE[@ } &Y=0 0 } 14B',]`
r!?ga (Z(S?`') public void splitterStop() $M 8&&M { >ep<W<b bStop = true; 31a,i2Q4 } \X:e9~ oT):#,s () _RLA } dA~:L`A|X iVI& r
|C.K /* {fzX2qMZ] **FileAccess.java bGH#s {'5 *//文件访问(定位,写) j)mU`b_ package NetFox; A~bSB
n: ' import java.io.*; 5]N0p,f |(3y09 q>.7VN[
vE public class FileAccessI implements Serializable{ M\C9^DX{ Nrr})
g //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 q()o|V RandomAccessFile oSavedFile; T,pr&1]Lw long nPos; /GIGE##1F THp_ dTD rMDvnF public FileAccessI() throws IOException rF-SvSj} { *#mmk1` this("",0); 9efDM } {5E8eQ })/P[^ SH{@yS[c! public FileAccessI(String sName,long nPos) throws IOException xz8e1M { ltNCti{Q oSavedFile = new RandomAccessFile(sName,"rw"); o+E~iCu5 this.nPos = nPos; G&g;ROgY oSavedFile.seek(nPos); 0+FPAqX } .n]"vpWm[ V#7,vas ,=u;1 public synchronized int write(byte[] b,int nStart,int nLen) sm/aL^4 { ?% 24M\ int n = -1; @*YF!LdU{M try{ ! Ld5Y$ oSavedFile.write(b,nStart,nLen); u /F!8# n = nLen; 8!{*!|Xd } ?s^qWA catch(IOException e) )j36Y =r3 { ,<rC,4-F< e.printStackTrace (); h+Co:pr } */;7Uv7 ?.46X^ XjG S.&'I return n; >&PM'k } jq,M1 &j F'2D^_ *-nO,K>y` } \)~d,M}kK el9P@r0 mAW.p=; /* u5oM;#{@- **SiteInfoBean.java |2j, */ =
j1Jl^[ package NetFox; }HoCfiE=X e'3V4iU] ="voJgvw public class SiteInfoBean { Tz @=N] D |H?t+Dyn)q _Vr- bpAf private String sSiteURL; //Site's URL v76Gwu$d private String sFilePath; //Saved File's Path W@T\i2r$z private String sFileName; //Saved File's Name {cXr!N^K private int nSplitter; //Count of Splited Downloading File VHD+NY/ WywS1viD Dp([r public SiteInfoBean() %F 2h C
x {//nSplitter的缺省值为5 }(nT(9| //default value of nSplitter is 5 h3?>jE=H this("","","",5); fN&\8SPE } /+Z*)q+SbT &u>dKf)5 3a?-UT! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) -l= 4{^pK { w|9 >4 sSiteURL= sURL; "2cOS PpQL sFilePath = sPath; FH,]' sFileName = sName; $tmdE)"& this.nSplitter = nSpiltter; Y2r}W3F= Q@W/~~N cRT'?w`} } -5<[oBL; |R}=HsYey >w
S'z]T9 public String getSSiteURL() e(0OZ_ w { Ehx9-*] return sSiteURL; Tv=lr6t8 } S^rf^% `8!9Fp h=#w< @ public void setSSiteURL(String value) `B)@ { Z`S#> o sSiteURL = value; w2DC5ei' } b#_RZ 2ioHhcYdJU A=N$5ZJ public String getSFilePath() +RooU?Aq { 7:jLZ!mgi return sFilePath; 7f>=-sv } C"I
jr=w t(z]4y 2&1mI>:F public void setSFilePath(String value) 2aYBcPFQh# { Scrj%h%[ sFilePath = value; xo[o^go } .t "VsY| _?~%+Oz/ W"NI^OX public String getSFileName() K[z)ts- { *Al@|5 return sFileName; K<>kT4 } [}L~zn6>?a HRf;bKZ FNQ<k[#K'~ public void setSFileName(String value) ,2FK$:M\ { MAek856 sFileName = value; o "VKAP } d[a(uWEl J,Sa7jv[ )WqolB public int getNSplitter() W==~9 { 2R/|/>T v return nSplitter; F1Z'tjj+ } LF7-??' *tXyd<_Hd &6sF wK public void setNSplitter(int nCount) *9'3 `^l { @:>"VP<( nSplitter = nCount; @]Cg5QW>T } cN,*QN } U=n7RPw <,} h8;Fr xC`!uPk/pL /* ,L<JG **Utility.java tsb[=W!Ar8 */ 2*Qv6
:qK package NetFox; $+4DpqJ N~)-\T:ap `zQuhD 8W public class Utility { Y1PR?c
Q bzi"7%c "Rj
PTRe: public Utility() s=8H<'l { v)
n- y7HFmGM x%mRDm~- } (y9KO56.V& dFz"wvu` o //线程睡眠 9?l a5 public static void sleep(int nSecond) dtTn]}J { h:4(Gm; try{ }*:3] Thread.sleep(nSecond); j`_S%E% X } +CSpL2@ catch(Exception e) f}-'67*Y { <i~xJi%1# e.printStackTrace (); SXL3>-Z E } {$frR "K } 4"P9z}y=i o 4F'z //日志 MPB[~#: public static void log(String sMsg) 7b"fpB { |
eBwcC#^ System.err.println(sMsg); `J.,dqGb } Sdq}?- &Sa [Sm<X t'44X public static void log(int sMsg) <6Q^o[L { w"R<8e= System.err.println(sMsg); %-n)L } Xh"9Bcjf } o#qdgZ <F9-$_m x{R440" /* "|
nXR8t.r **TestMethod.java Wdd}y`lS */ DGvuo 8 package NetFox; 2
}xePX9? qk& F>6<9* {hS!IOM public class TestMethod { Rpn<"LIoB: x1gS^9MqCB lSX1|,B7:] public TestMethod() L.;b(bFe { ///xx/weblogic60b2_win.exe "tyRnUP try{ 45yP {+/-Q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); K,S4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); i%i~qTN SiteFileFetch fileFetch = new SiteFileFetch(bean); opa/+V3E4 fileFetch.start(); yy3rh(ea } I!/32* s1t catch(Exception e){e.printStackTrace ();} zhJeTctRz PD&e6;rj; HoQb.Z } YIe1AF} }c,b]!: 4%0s p public static void main(String[] args) mE~WE+lw9 { !U`4 new TestMethod(); h"[B zX } cK$yr)7 } /?81Ypt 点击下载更多相关资料
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