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/* 8~:qn@Z|E **SiteFileFetch.java G9 z Q{E */ rj$u_y3S* package NetFox; B9iH+
]W import java.io.*; 4u X<sJ* import java.net.*; |^Try2@ L|S#(0 Slq=;TDp public class SiteFileFetch extends Thread { //Ioh (N F0bmGDp@- (Z) SiteInfoBean siteInfoBean = null; //文件信息Bean B^U5=L[:p long[] nStartPos; //开始位置 J[L$8y: long[] nEndPos; //结束位置 &xr?yd FileSplitterFetch[] fileSplitterFetch; //子线程对象 M^r1b1tR long nFileLength; //文件长度 xex/L%!Rj boolean bFirst = true; //是否第一次取文件 6;dB boolean bStop = false; //停止标志 dSsMa3X[n File tmpFile; //文件下载的临时信息 CeR4's7 DataOutputStream output; //输出到文件的输出流 #E5#{bra \`{ YqO T //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~yt+xWV public SiteFileFetch(SiteInfoBean bean) throws IOException BI;in;Ln { "6
dC siteInfoBean = bean; -#3B>VY //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \PU|<Ru. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); U;OJ.a9 if(tmpFile.exists ()) =4
&9!Z { )oG_x{ bFirst = false; |?V6__9 read_nPos(); T$GhE } $Xk1'AzB8 else )eY3[>` { D?qA
aq&4 nStartPos = new long[bean.getNSplitter()];
dy,,x nEndPos = new long[bean.getNSplitter()]; qQ/j+ } nEQw6q~je :uZcN W: cOzJ i4'?/UPc } kxWf1hIz0 %l,p />r $oq&uL public void run() Nk86Y2h { z^{VqC*o+ //获得文件长度 xlqRW" //分割文件 3tS~/o+]
//实例FileSplitterFetch mcb0% //启动FileSplitterFetch线程 #]:yCiA //等待子线程返回 TTmNPp4q try{ `DC)U1 if(bFirst) zvdtP'&uj { a5?Rj~h!< nFileLength = getFileSize();
(O,|1 if(nFileLength == -1) xV~`sqf { D"bLJj/! System.err.println("File Length is not known!"); DWHl,w;[z` } A
99 .b else if(nFileLength == -2) ;,JCA#
N { _&.CI6 System.err.println("File is not access!"); 8>T
' } 0kQAT# else N02N
w(pi { Q6RBZucv for(int i=0;i<nStartPos.length;i++) kE UfQLbn { Ca*^U- nStartPos = (long)(i*(nFileLength/nStartPos.length)); #J, `a. } JdfjOlEb for(int i=0;i<nEndPos.length-1;i++) 9W5vp:G { E{_p&FF nEndPos = nStartPos[i+1]; jv5p_v4%O } u(\b1h n nEndPos[nEndPos.length-1] = nFileLength; +<Uc42i7n } .?[2,4F; } ^B1Q";#
B^ B<H5WI }a'8lwF%I //启动子线程 ].
IUQ*4t fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /"~CWNa for(int i=0;i<nStartPos.length;i++) U:#9!J?41 { mUm9[X~' fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @;G}bYq^(I siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (4>k+ H nStartPos,nEndPos,i); j Bl I^ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zK}$W73W^ fileSplitterFetch.start(); !HY+6!hk } 1$q SbQ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x
a7x
2]~- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 06]J] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 0{@E=}}h nEndPos = " + nFileLength); Hp8)-eT // fileSplitterFetch[nPos.length-1].start(); [9Q2/V;Uk% &f|LjpMCf yg5 Ik{ //等待子线程结束 Xi6XV3G //int count = 0; |bO}|X //是否结束while循环 S$=])^ dur boolean breakWhile = false; QApil ]p `#KVW L/F!Y%=;[ while(!bStop) ql2>C.k3L { m.&z:`x[ write_nPos(); 3EI$tP @4 Utility.sleep(500); wg<DV!GZ breakWhile = true; b_|`jHes >(|T]u](q W-<C%9O! for(int i=0;i<nStartPos.length;i++) t1 OnA#]/_ { *<i
{
Mb Q if(!fileSplitterFetch.bDownOver) vc^qpOk { @@# ^G8+l breakWhile = false; va:5pvt2& break; ]pzf{8% } f]qPxRw } Zyu4! if(breakWhile) Eii)zo8Xd break; KWLI7fTgj$ TXv3@/>ZlG q#xoM1 //count++; GASDkVoij //if(count>4) >j4;{r+eQw // siteStop(); fx_7X15 } _<+! .Lr;{B x<>#G~- System.err.println("文件下载结束!"); P bj &l0C } D2# 3fM6 catch(Exception e){e.printStackTrace ();} YiTiJ9jf } \3"4;fM!i ;*BG{rkr T[`o$j6 //获得文件长度 fk<0~tE public long getFileSize() 9G[!"eZ} { 7YV}F9h4 int nFileLength = -1; rUc2'Ct try{ eBFsKOtu URL url = new URL(siteInfoBean.getSSiteURL()); %|*tL7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H!y1& httpConnection.setRequestProperty("User-Agent","NetFox"); _rdEur C6 [6`8^-}? ^a0{"|Lq int responseCode=httpConnection.getResponseCode(); CCNrjaA if(responseCode>=400) E].hoq7WiB { ]]Sz|6 P processErrorCode(responseCode); %?Yf!)owh return -2; //-2 represent access is error ,,sKPj[ } 6U Q~Fv`] ,6=j'j1#a M2W4 RovfR String sHeader; 9{RCh9 _ho9}7 > J/mLmSx for(int i=1;;i++) 9. 6"C<eYt { )\s{\u
\ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); C< 3`]l //Utility.log(in.readLine()); g`i?]6c}jt sHeader=httpConnection.getHeaderFieldKey(i); F{WV}o=MY if(sHeader!=null) <wfPbzs-V { }^+E S^~ if(sHeader.equals("Content-Length")) QbjO*:c4 { LUc!a4i"fO nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Za_w@o break; CBN,~wzP* } ,bzE`6 } 84j6.\, else pX8TzmIB0 break; `|)V]< }
?12[8 } ^hr^f;N catch(IOException e){e.printStackTrace ();} (HbA?Aja catch(Exception e){e.printStackTrace ();} 9AF%Y:y -N
$4\yp :[xFp}w{ Utility.log(nFileLength); <'N"GLJ }$iKz*nx| mhVdsa return nFileLength; [1nfSW } o-a\T d0``: 8JYU1Ew //保存下载信息(文件指针位置) :d}I`)& private void write_nPos() .;}vp* { UCV1 { try{ !k@(}CN_* output = new DataOutputStream(new FileOutputStream(tmpFile)); GVR/p output.writeInt(nStartPos.length); QiC}hj$ for(int i=0;i<nStartPos.length;i++) ]s_,;PG U { ]dIcW9a // output.writeLong(nPos); bca4'`3\| output.writeLong(fileSplitterFetch.nStartPos); ;}1O\nngR output.writeLong(fileSplitterFetch.nEndPos); /|Z_Dy } o1lhVM`15 output.close(); )
rw!. )
} TS4Yzq,f catch(IOException e){e.printStackTrace ();} lt08
E2p9 catch(Exception e){e.printStackTrace ();} 0"}qND } dyWj+N5( CGw, RNV #djby}hi //读取保存的下载信息(文件指针位置) A\ARjSdb private void read_nPos() '^B[Krs'Z` { Cq8.^=}_ try{ 8! eYax DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); RGEgYOO int nCount = input.readInt(); 7}#zF]vHNi nStartPos = new long[nCount]; B^Sxp=~Au nEndPos = new long[nCount]; Gk:tT1 for(int i=0;i<nStartPos.length;i++) W% @r { Z<D8{&AjS nStartPos = input.readLong(); ['m7Wry nEndPos = input.readLong(); w3Lr~_j } C(CwsdlP input.close(); Fz11/sKz } IC"Z.'Ph catch(IOException e){e.printStackTrace ();} :3b.`s(M catch(Exception e){e.printStackTrace ();} {ooztC } Mc,3j~i 2ieyU5q7# ^?J3nf{ private void processErrorCode(int nErrorCode) C&|K7Zp0v { "w&IO}j;= System.err.println("Error Code : " + nErrorCode); n)|{tb^ } 7f] qCZ<0V hKnAWKb0 %lq[,6?>5 //停止文件下载 9Js+*,t public void siteStop() w)N~u% { 9U>OeTh( bStop = true; ONVhB for(int i=0;i<nStartPos.length;i++) y%Rq6P=4Q fileSplitterFetch.splitterStop(); hsB3zqotF `%A vn< R_W6} } :W^\ }UX4 } CY~ S{w //负责部分文件的抓取 1-V"uLy@gC **FileSplitterFetch.java D*&#}c,* */ hT`fAn_ package NetFox; tm&,u*6$W? S86,m= `L
LS|S] import java.io.*; .af+h<RG4$ import java.net.*; ZyM7)!+kPa r=-b@U.fk> Ptm=c6H(' public class FileSplitterFetch extends Thread { A!cY!aQ :6MV@{;PJ j"hNkCF String sURL; //File URL a8$4 long nStartPos; //File Snippet Start Position NX4G;+6 long nEndPos; //File Snippet End Position c=,HLHpFO( int nThreadID; //Thread's ID Al1_\vx7 boolean bDownOver = false; //Downing is over ]ur?i{S, boolean bStop = false; //Stop identical {p.^E5& FileAccessI fileAccessI = null; //File Access interface ]"/SU6#4: E+ctiVL B"YN+So public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException nW)?cQ
I { A+|bJ>q this.sURL = sURL; dGgltY this.nStartPos = nStart; 8WE@ X)e this.nEndPos = nEnd; EXMW, nThreadID = id; Q6T"8K/ fileAccessI = new FileAccessI(sName,nStartPos);//定位 QJ&]4*>a }
STl8h}C 7Kf :wq][0) public void run() >AFQm { <Drm#2x!E while(nStartPos < nEndPos && !bStop) I
cASzSjYX { m%0_fNSJ 5tyA{&Ao $K.DLqDt try{ D]o=I1O? URL url = new URL(sURL); 6f2?)jOW^N HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -T}r$A httpConnection.setRequestProperty("User-Agent","NetFox"); 15@2h String sProperty = "bytes="+nStartPos+"-"; r+8)<Xt+p httpConnection.setRequestProperty("RANGE",sProperty); yAAV,?:o[ Utility.log(sProperty); 5o0n4W #SKC>MGz mv>0j<C91 InputStream input = httpConnection.getInputStream(); mPU}]1*p //logResponseHead(httpConnection); Zs(BViTb| IsmZEVuC NE.h/+4 byte[] b = new byte[1024]; v%$l( int nRead; ht*N[Pi4; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g$ HL:: { @0]w!q nStartPos += fileAccessI.write(b,0,nRead); 0C;Js\>3] //if(nThreadID == 1) 8 :WN@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -RJ~Sky[ } (/At+MF3E ^vxx]Hji BTD_j&+( Utility.log("Thread " + nThreadID + " is over!"); EnGh&] bDownOver = true; &\I<j\F2/ //nPos = fileAccessI.write (b,0,nRead); m.rV1#AI } B`.aQ catch(Exception e){e.printStackTrace ();} [(2^oTSRaq } fP:]s@$ } mKjTJzS O&MH5^I qdLzB //打印回应的头信息 /O<~n%< G public void logResponseHead(HttpURLConnection con) >yr;Y4y7K { :2H]DDg( for(int i=1;;i++) K\wu9z8M { T;5VNRgpI String header=con.getHeaderFieldKey(i); rrR"2WuGO if(header!=null) )u+O~Y95&i //responseHeaders.put(header,httpConnection.getHeaderField(header)); k,$/l1D Utility.log(header+" : "+con.getHeaderField(header)); |fywqQFq else bfpeK>T break; 3b\s;! } ]?)uYot } c&1_lI,tH (V&8
WN A1F$//a public void splitterStop() Dt<MEpbur { $K+|bb bStop = true; { TI,|'>5[ } L){V(*K ' c]Gs{V]\ 2z*}fkJ } Z'`\N@c# <p
CD> p6NPWaBR
/* unc6 V% **FileAccess.java !?_CIt$p *//文件访问(定位,写) akk*f+TD` package NetFox; FAL#p$y} import java.io.*; 2*^=)5Gj-h |JR`" nF` bl&9O public class FileAccessI implements Serializable{ T u%XhXl:j l?$X.CwX //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6eUGE 4NF( RandomAccessFile oSavedFile; M*bsA/Z long nPos; Y[vP]7- 2+I5VPf [u;(4sa} public FileAccessI() throws IOException H>D sAHS { Y@:l!4DI this("",0); _f8H%Kgk; } "=n%L +6% 50dN~(;p )b (+= public FileAccessI(String sName,long nPos) throws IOException \BH?GMoP { Xp|4 WM oSavedFile = new RandomAccessFile(sName,"rw"); ob8}v*s this.nPos = nPos; r>! @Z2%s oSavedFile.seek(nPos); 9(qoME}>= } ftcLP q+4dHS)x 5x|$q kI public synchronized int write(byte[] b,int nStart,int nLen) AA)pV- { Q=d:Yz":S int n = -1; eaNfCXHDN try{ wEl7mg ! oSavedFile.write(b,nStart,nLen); k>Fw2!mA^ n = nLen; *z6A ~U } ern\QAhX X catch(IOException e) sVFX(yx0 { Xs|d#WbX e.printStackTrace (); L~e0^X? } 9{U@s *g
%bdO M@7U]X$g return n; !~RK2d } wLiPkW _.R]K$U O-ENFA~E;v } KPDJ$,: ]@cI _n r_ +!3 /* uH?4d!G **SiteInfoBean.java N.+A-[7,W */ x^_c4,i) package NetFox; 9>0OpgvC( nu:l;+,VY cUP1Uolvn public class SiteInfoBean { h5T~dGRlR Yc?S< j~S=kYrGM private String sSiteURL; //Site's URL !-n*]C private String sFilePath; //Saved File's Path : O@(Sv private String sFileName; //Saved File's Name 1c@S[y private int nSplitter; //Count of Splited Downloading File h4itXJy52B 8%?MRRK 7)1%Z{Dy public SiteInfoBean() ]b>XN8y. {//nSplitter的缺省值为5 g18zo~LZ //default value of nSplitter is 5 !gV{[j?~zr this("","","",5); :-U&_%#w } =bP<cC=3b Y@q9 oiR9NB&< public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (pM&eow} { ^fsC]9NS sSiteURL= sURL; _g9j_
x:= sFilePath = sPath; -DJ,<f*$ sFileName = sName; z79oj\&[ this.nSplitter = nSpiltter; As5l36 OAFxf,b ltU{P|7!E } P.Cn[64a+@ 6C"zBJcGc yxT}hMa public String getSSiteURL() RTbV!I { rx;;|eb, return sSiteURL; AqQ5L>:Gq } ^V9|uHOJoq 4_CL1g =aQlT*n%3 public void setSSiteURL(String value) DWx;cP8[ { gaNe\ sSiteURL = value; 8"NPj0 } {/N8[?zML uit.r^8l 3?`TEw~' public String getSFilePath() IY[qWs { @*L-lx return sFilePath; i"Hc( lg } 3G 5xIr6
(RrC<5" D+
.vg?8 public void setSFilePath(String value) Z
eY*5m { 1#;^Z3 sFilePath = value; =_3rc\0 } Eb6cL`#N SYQP7oG9oQ KRn[(yr`% public String getSFileName() yKK9b
{ @].!}tz return sFileName; xzfugW } XV4aR3n{Q }X=c|]6i^ Uc,.. public void setSFileName(String value) U|.r -$|5P { EBk-qd
a} sFileName = value; 'r_Fi5[q } 7@e}rh?N-| ;o;ak.dTt [euR<i*I# public int getNSplitter() 9mn~57`y { 1 |)CQ return nSplitter; l O* } tQxxm=> EB}~^ aY &;r'JIp public void setNSplitter(int nCount) ^
T`T?*h { *qLk'< nSplitter = nCount; mea}
9]c } @x
A^F%( } @ZJ}lED3 |=~mRqG lfd-!(tXD /* v$JW7CKA **Utility.java #h9Gl@| */ t;PG package NetFox; q(R|3l^6T w@6y.v1I{ *}Gys/\!S public class Utility { rK}sQ4z= 1=9GV+`n
}hm_Ws public Utility() 5 b,|6 { ypemp=+(r -`z%<)!Y n_Y7*3/b-o } 0Krh35R_)F qkp0' f*} //线程睡眠 $T66%wX public static void sleep(int nSecond) o
/1+
}f { 0Y0`$
try{ nra)t|m Thread.sleep(nSecond); -k2|`t _ } ?|}qT05 catch(Exception e) d( ru5*p { ;l0%yg/} e.printStackTrace (); T$<'ZC } :f_oN3F p } B Nb_i H ;.=0""-IF //日志 jA~omX2A public static void log(String sMsg) SdMLO6- { >\J<` System.err.println(sMsg); 1P'L<z } '^7UcgugB '"LaaTTs hcYqiM@8> public static void log(int sMsg) d1t_o2 { xb9^WvV System.err.println(sMsg); 4f~q$Sf]< } lg ,% } Y$)y:.2# aM#xy6:XG MY z!zI /* eAjR(\f> **TestMethod.java 63$`KG3 */ 0jxXUWO package NetFox; 55] MRv u WdKG({][ cG@Wo8+ public class TestMethod { Qz2jV jeA2yjAC C{G=Y[?oc public TestMethod() -{z[.v.p { ///xx/weblogic60b2_win.exe =JPY{'V O try{ 0@EI@X;q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); SJ;{ Hg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); P%vouC0W SiteFileFetch fileFetch = new SiteFileFetch(bean); 2S[:mnK fileFetch.start(); @7Ln1v } >Lo'H}[pF catch(Exception e){e.printStackTrace ();} M)wNu Rp:I&f$Hk/ )Wt&*WMFXl } 9U3 }_ E(1G!uu< CQ Ei(ty public static void main(String[] args) 10r!p:D { **AkpV) new TestMethod(); yOXEP } 4&e<Sc64 } ma QxU( 点击下载更多相关资料
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