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/* ;UpJ=?W **SiteFileFetch.java h)@InYwu7 */ R04J3D| package NetFox; > 0T
Za import java.io.*; SX_4=^ import java.net.*; H(&Z:{L Q6x% [O1|75 public class SiteFileFetch extends Thread { CKd3w8; t!~S9c + Kk@Q SiteInfoBean siteInfoBean = null; //文件信息Bean lkwh'@s. long[] nStartPos; //开始位置 {g_@Tuu long[] nEndPos; //结束位置 .`J:xL%Z FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^mf jn-=3 long nFileLength; //文件长度 <[<247% boolean bFirst = true; //是否第一次取文件 y
1nU{Sc@ boolean bStop = false; //停止标志
w~LU\Ct File tmpFile; //文件下载的临时信息 y<*-tZV[ DataOutputStream output; //输出到文件的输出流 %Rarr n| C|& //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) o_rtH|ntX5 public SiteFileFetch(SiteInfoBean bean) throws IOException "-0;#&! { &D*8l?A/1f siteInfoBean = bean; 9^\hmpP@D //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); TGpSulg7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
W_}/ O'l{ if(tmpFile.exists ()) '\t7jQ { gQ+9xT d bFirst = false; ]nc2/S% read_nPos(); t7^D-l } KTv4< c] else s#P:6]Ar { u E.^w;~2= nStartPos = new long[bean.getNSplitter()]; _Wma\(3$ nEndPos = new long[bean.getNSplitter()]; +>#e=nH } k{-`]qiK $eX* ?d5h9}B 3+9
U1:1[. } R@n5AN( rJV?)=Z lD3)TAW@o public void run() _z]v<,=3M { fnOIv# //获得文件长度 j)";:v //分割文件
iRs V#s //实例FileSplitterFetch Bc[6*Y,%T //启动FileSplitterFetch线程 WjOH/$( //等待子线程返回 choL%g} try{ nq@5j0fK if(bFirst) wko2M[ { 4m /TW) nFileLength = getFileSize(); 2GUupnQkD if(nFileLength == -1) aTClw<6} { Kj!Y K~~ System.err.println("File Length is not known!"); L|J~9FM } 9wMEvX70 else if(nFileLength == -2) EneAX&SG { q,@+^aZ System.err.println("File is not access!"); m^A]+G#/ } )Mi'(C; else n$W"=Z;` { jsdBd2Gdc for(int i=0;i<nStartPos.length;i++) ]1}h8/ { ?4sJw: nStartPos = (long)(i*(nFileLength/nStartPos.length)); WIG=D{\Yx } Tq#<Po $ for(int i=0;i<nEndPos.length-1;i++) -l JYr/MSL { xFwXW) nEndPos = nStartPos[i+1]; 27iy4(4 } @h(!<Ux_ nEndPos[nEndPos.length-1] = nFileLength; c'rd $ } ~6sE an3p } 7E(%9W6P 4>_d3_1sn waQtr,m) //启动子线程 rhoeZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; x.\XUJ4x for(int i=0;i<nStartPos.length;i++) lY,/ W { +5-fk>o fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZpWu,1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .[,6JU% nStartPos,nEndPos,i); 6|oWaA\gI Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }{mG/(LX8 fileSplitterFetch.start(); 045\i[l= } p%8v` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !-RwB@\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !7c'<[+Hm // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", zAI|Jv@ nEndPos = " + nFileLength); b^Z$hnh]S // fileSplitterFetch[nPos.length-1].start(); }$:#+
(17 I%i:)6Un-y >2Ca5C //等待子线程结束 \k4pK &b //int count = 0; |z+9km7, //是否结束while循环 +f|6AeE boolean breakWhile = false; IfB/O.;Kz *]2R.u C fSl
54 while(!bStop) n}:t< { 9gR.RwR X write_nPos(); !o<ICHHH Utility.sleep(500); "&Mou breakWhile = true; A;T[[' K7Gm-=% }9=2g`2Q for(int i=0;i<nStartPos.length;i++) ]ViOr8u { iD`k"\>9 if(!fileSplitterFetch.bDownOver) 8nsZ+,@+[ { ]738Z/)^ breakWhile = false; >-zkB)5<,# break; M5 `m.n< } ^]7,1dH}M } Qg> 0G%cXU if(breakWhile) x
^[F]YU break; 4oN${7k0 ~v\hIm3=m s ^3[W0hL //count++; #s{aulx //if(count>4) (Com, // siteStop(); EZ{/]gCK } Z8fJ{uOIL esteFLm`6 z^3Q.4Qc6^ System.err.println("文件下载结束!"); '%ebcL } Efvq?cG& catch(Exception e){e.printStackTrace ();} CrO`=\ } 1vsu[n 6}STp_x JaFUcpZk$ //获得文件长度 eQ\jZ0s;p public long getFileSize() 6y9C@5p}B { u?Z
<n: int nFileLength = -1; 9N1#V
K try{ [9HYO URL url = new URL(siteInfoBean.getSSiteURL()); {NV:|M ! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \=Nm5: httpConnection.setRequestProperty("User-Agent","NetFox"); v~aLTI 0#
l#,Y6#I Th/{x
h int responseCode=httpConnection.getResponseCode(); /ISLVp%H if(responseCode>=400)
(JU_8j! { W]@6=OpH processErrorCode(responseCode); 5y}BCY2=/ return -2; //-2 represent access is error KqK9X } jiq2 x\\! 7$#rNYa,z 3t*# !^$ String sHeader; %i3{TL j9>TTgy@ wB2}uk7 for(int i=1;;i++) mZE8.` { w#<p^CS //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "4RQ`.SR //Utility.log(in.readLine()); }>,CUz sHeader=httpConnection.getHeaderFieldKey(i); p>&S7M/9 if(sHeader!=null) -tMA { LGfmUb-{] if(sHeader.equals("Content-Length")) jJc07r'] { >+SZd7p nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >"b[r break;
aH } kJ__:rS(T_ } ^6#-yDZC@ else . wmkj break; 5v+L';wx[T } ?eVj8 $BQo } T$IUKR catch(IOException e){e.printStackTrace ();} ~ttKI4 catch(Exception e){e.printStackTrace ();} wcl!S { 8UYJye8 VRB~7\A5<) Utility.log(nFileLength); xRB7lV* ozuIwzi7N s|E%~j[9 return nFileLength; j<@fT
ewZ } W.p66IQwL& T1bFxim#b pW7kj&a_. //保存下载信息(文件指针位置) );!dg\U private void write_nPos() `^zQ$au'u { 0H<4+
*`K try{ Z7oaQ\fR output = new DataOutputStream(new FileOutputStream(tmpFile)); ho_4fDv output.writeInt(nStartPos.length); rXuAixu!t for(int i=0;i<nStartPos.length;i++) k0knPDbHv { (qbc;gBy // output.writeLong(nPos); #.b^E3#+ output.writeLong(fileSplitterFetch.nStartPos); *.xZfi_| output.writeLong(fileSplitterFetch.nEndPos); Stt* 1gT } MorW\7-} output.close(); I X?@~' } t+J)dr catch(IOException e){e.printStackTrace ();} zG<0CZQ8 catch(Exception e){e.printStackTrace ();} I0(8Z]x } a 1NCVZ zaBG= ^ISQ{M#_ //读取保存的下载信息(文件指针位置) $M-NR||k private void read_nPos() Z<I[vp6{ { Q+lbN try{ "s${!A) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ir^ BC!<2> int nCount = input.readInt(); ^h`!f vyH nStartPos = new long[nCount]; 8>m1UO Nr nEndPos = new long[nCount]; ;}f6Y['z for(int i=0;i<nStartPos.length;i++) o3fR3P%$ { hg{ &Y(J!U nStartPos = input.readLong(); M{G$Pk8[ nEndPos = input.readLong(); jXtLo,km } o;%n,S8J|^ input.close(); lR,G; } YyG~#6aCh catch(IOException e){e.printStackTrace ();} vmMV n-\# catch(Exception e){e.printStackTrace ();} A=W5W5l(> } Na-q%ru Up'."w_zE V54q"kP,@. private void processErrorCode(int nErrorCode) SK}HXG{? { WVinP(#nfM System.err.println("Error Code : " + nErrorCode); B
JU*`Tx } 9Y\F53p&j UUD\bWfn JTjzT2`A. //停止文件下载 ]gEu.Nth` public void siteStop() ipfm'aQ {
KzIt bStop = true; G;Us-IRZ for(int i=0;i<nStartPos.length;i++) 1O|RIv7F[/ fileSplitterFetch.splitterStop(); n|J.)E. |b,zw^!e[' Dxz5NW4 } C CLfvex } eK\|SQb //负责部分文件的抓取 py}.00it **FileSplitterFetch.java WT I 'O */ .HQVj 'g package NetFox; on6<l .0?ss0~ xu`d`!Tx import java.io.*; Vvx a.B import java.net.*; 3LT+9ad2d t
CkoYrvT anpJAB:1 public class FileSplitterFetch extends Thread { 7=L:m7T )H.ubM1 EUJ1RhajF String sURL; //File URL .QNjeMu. long nStartPos; //File Snippet Start Position }k4` long nEndPos; //File Snippet End Position Z3Bo@`&? int nThreadID; //Thread's ID (/To?` boolean bDownOver = false; //Downing is over t*eleNYeS~ boolean bStop = false; //Stop identical O7! fI'R FileAccessI fileAccessI = null; //File Access interface UUZ6N ZQI e =0l<Rj :v|r= #OI public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException C#ZmgR { $:xF)E this.sURL = sURL; -WQ_[t9l this.nStartPos = nStart; uPM8GIvZX. this.nEndPos = nEnd; O_qu;Dx! nThreadID = id; Z3LQl( fileAccessI = new FileAccessI(sName,nStartPos);//定位 c1 gz#, } YK(XS"Kl F+lm [4n vcaBL<io public void run() {yGZc3e1j { Kc%tnVyGh: while(nStartPos < nEndPos && !bStop) Z $ p^v*y { )6PJ*;p- BDarJY `;zu1o try{ Xi 1q]ps URL url = new URL(sURL); mrhsKmH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2<p5_4"-U* httpConnection.setRequestProperty("User-Agent","NetFox"); FSI]k: String sProperty = "bytes="+nStartPos+"-"; ,Zf
:R httpConnection.setRequestProperty("RANGE",sProperty);
O6M}W_ Utility.log(sProperty); >u'/$k >#Grf)@"6 dqIZ#;:g InputStream input = httpConnection.getInputStream(); D}=/w+ //logResponseHead(httpConnection); |JirBz @n5;|`)\ *[XN.sb8E byte[] b = new byte[1024]; xCDA1y;j int nRead; Fh*q]1F while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @5<]W+jk4 { O>)n*OsS nStartPos += fileAccessI.write(b,0,nRead); ;m2"cL>{l //if(nThreadID == 1) }I`
ku.@5 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zsR wF } hX{g]KE> ==PQ-Ia V{ 4i$' Utility.log("Thread " + nThreadID + " is over!"); B}l}Aq8 bDownOver = true; S,d ngb{ //nPos = fileAccessI.write (b,0,nRead); jQH5$ } =B3!jir catch(Exception e){e.printStackTrace ();} x= vE&9_u } ,qBnqi[ } jSUAU}u!M PHe~{"|d? o O{|C&A //打印回应的头信息 LaEX kb*s public void logResponseHead(HttpURLConnection con) l^!0|/Vw { "-~D!{rS for(int i=1;;i++) 5~<a>> { IPr*pQ{;c String header=con.getHeaderFieldKey(i); (;Dn%kK if(header!=null) Z
L6~Eut //responseHeaders.put(header,httpConnection.getHeaderField(header)); :N+K^gI) Utility.log(header+" : "+con.getHeaderField(header)); p``;!3~~ else SopNtcu! break; Vsm%h^]d } A{{q'zb! } q\z=z$VR v4Fnh`{ Gdc~Lh public void splitterStop() &VZmP5Gv { !h`cXY~w bStop = true;
_{Fdw } w<I5@)i| s%S_K D>"{H7mY } Qw{\sCH> ~#N.!e4 >%jEo'0;_ /* 3;-@<9 **FileAccess.java Jnu}{^~ *//文件访问(定位,写) TQbFI;\ package NetFox; / ut~jf` import java.io.*; UG^?a *x#&[> tnKpn-LPA public class FileAccessI implements Serializable{ O>o}<t7 k:+)$[t7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 uP%;QBb RandomAccessFile oSavedFile; 5,=B1 long nPos; an[3vKb X&FuqB aQym=
6%e public FileAccessI() throws IOException L(!!7B_, { X-;Qorb^ this("",0); ^V0{Ew/x } c5mhl;+' M~g~LhsF dWq/)%@t public FileAccessI(String sName,long nPos) throws IOException )W}/k$S { ]B-$p p oSavedFile = new RandomAccessFile(sName,"rw"); .$ P2W0G this.nPos = nPos; Mh-*5Rx oSavedFile.seek(nPos); B3g82dm } 9-Nq[i" ,P; a/{U [/fwt! public synchronized int write(byte[] b,int nStart,int nLen) {pQ@0b { u;'<- _ int n = -1; *nUpO] try{ c|;|%"Mk oSavedFile.write(b,nStart,nLen); !Z0rTC3d n = nLen; wEHrer } G+QNg.pH catch(IOException e) CrwcYzrRWl { ]`i@~Z h\ e.printStackTrace (); 2'UFHiK } @qr3v>3X< E't G5,/m _.J[w6 return n; ~"<VUJ=Ly: } p?`|CE@h7
+<9q]V $=QGua V } (82\&dfy KiRt' @)juP- o% /* 2Ws/0c **SiteInfoBean.java
r1az=$ */ Cak/#1 package NetFox; C&s }m0R /x8C70W^ :]z-Rz public class SiteInfoBean { zHum&V8=H {;(g[H=q; G4J6 private String sSiteURL; //Site's URL _ry En private String sFilePath; //Saved File's Path !k??Kj private String sFileName; //Saved File's Name x8rFMR#S= private int nSplitter; //Count of Splited Downloading File X#NeB>~ pra-8z- )]>Y*<s } public SiteInfoBean() __zu-!v {//nSplitter的缺省值为5 Sy0s`\[ //default value of nSplitter is 5 [sO<6?LY this("","","",5); <"|<)BGeI }
rgvc5p "a`0w9Mm} *,XJN_DKj public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) s:Ql](/B# { ht
cO
~b sSiteURL= sURL; F]&J%i
F[ sFilePath = sPath; b>AAx$2Y sFileName = sName; <~8f0+" this.nSplitter = nSpiltter; -_f0AfU/a #uw*8&%0 fdEj#Ux<H } g:e8i~ aFc'_FrQ Y(!)G!CMc public String getSSiteURL() UmI@":|- { YU \t+/b return sSiteURL; +7vh_ _ } }lvP|6Y: y @_(@s*4W J<$'^AR9"q public void setSSiteURL(String value) 4 }YT@={g} { #?d>S;)+ sSiteURL = value; Ywb)h^{! } {ZYCnS&?CL 6Q?6-,?_ (i~%4w= public String getSFilePath() D
'_#?%3^ { Yiw^@T\H` return sFilePath; 7X3l&J2C4l } 8; N}d)*O owVUL~ ] j?Fk$C public void setSFilePath(String value) V@xnz)^t { UY& W] sFilePath = value; {$eZF_}Y^ } >v4~:n2D W)P_t"'@L Vm8_
!$F public String getSFileName() <YNPhu~5 { o;-!?uJ return sFileName; 2{tJ'3 } L=Jk"qWV0 dz.MH 9-<V%eNX public void setSFileName(String value) [0
f6uIF { rTiuQdvo sFileName = value; bL#TR;*] } fOfz^W Fi=8B&j :[?o7%" public int getNSplitter() 'GO..m"G { ,O`*AzjS5Q return nSplitter; QO^X7A"?X } tKViM@T ;+Kewi;< p2?+[d public void setNSplitter(int nCount) /r{5Lyk* { lMf5F8 nSplitter = nCount; s-DL=MD } vK>^#b3 } ]
:#IZ0# lGgKzi9VD c{P`oB8 /* `^h##WaXap **Utility.java oRF"[G8BV */ iiFKt( package NetFox; AiI# " ~Q\ZDMTK Q$5:P& public class Utility { (ZSSp1Rv '0]_8Sy& !|QeYGnq6 public Utility() @Oay$gP{T { At|tk ~ ?_Z!eS t$5]1dY$X } 9!C?2*>A P Z'kYf //线程睡眠 d> AmM!J public static void sleep(int nSecond) iR =aYT~ { ~ZC=!|Q# try{ /T(~T Thread.sleep(nSecond); k&;L(D } xfSvvCy catch(Exception e) *9&YkVw~ { ar}759 e.printStackTrace (); -"L6^IH7 } &y?B&4|hM } 8TvPCZ$x SSC!BcC1 //日志 MUl+Oy> public static void log(String sMsg) b=l}|)a { ]TOY_K8"z# System.err.println(sMsg); VX%\_@ } /L Tyiiz6 6K0*?j{;" A1;t60z+q> public static void log(int sMsg) nClU5 { Agf!6kh System.err.println(sMsg); >D aS*r } 2p ,6=8^v } [: j_Y3-9 /q]@|5I M 4?3l /* V>SA3
**TestMethod.java (*gpa:Sc */ &6EfybAt^_ package NetFox; Br??Gdd Pl6=._
]x\wP7x public class TestMethod { d(XWt;K K 1OL~)X3 VG^-aR_F public TestMethod() wH<* { ///xx/weblogic60b2_win.exe 1vb0G;a;| try{ \_'pUp22 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )9->]U@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); de=T7,G# SiteFileFetch fileFetch = new SiteFileFetch(bean); jd*H$BU^ fileFetch.start(); i[n1}E.@ } -nSqB{s!SD catch(Exception e){e.printStackTrace ();} WI3!?>d )]R8
$S "bH ~CG:Y } q<7n5kJ~ 2{N0. |5 0qd`Pf public static void main(String[] args) | <$O5b' { kA0^~ new TestMethod(); Lf9h;z># } ^g\%VIOD } Y8T.RS0 点击下载更多相关资料
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