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/* =c{/ Z **SiteFileFetch.java Jh3(5d"MV */ o$k1&hyH package NetFox; IuJj;L1 import java.io.*; 0~qnwe[g} import java.net.*; %<x2=#0 /\=syl Ra\>^W6z public class SiteFileFetch extends Thread { tvH{[e$ X{SD3j=G# %xE9vN; SiteInfoBean siteInfoBean = null; //文件信息Bean P{
AJH1 long[] nStartPos; //开始位置 8$SA"c) long[] nEndPos; //结束位置 (+'*_
FileSplitterFetch[] fileSplitterFetch; //子线程对象 #!,tId long nFileLength; //文件长度 * A B boolean bFirst = true; //是否第一次取文件 S`yY<1[O boolean bStop = false; //停止标志 W~ 6ii\ File tmpFile; //文件下载的临时信息 G.KZZ-=_4 DataOutputStream output; //输出到文件的输出流 Z-(V fp4 l`s_Id# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9Ra_[1 public SiteFileFetch(SiteInfoBean bean) throws IOException n !ty\E { L_Q1:nL-0 siteInfoBean = bean; 'Wv=mBEfZ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); e<_p\LiOS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ocwh*t)<k if(tmpFile.exists ()) wIi_d6? { 2=pVX bFirst = false; ,(0q read_nPos(); cC'{+j8-a } h(aF>a\Z else KNtsz[#b { `@MY}/
o. nStartPos = new long[bean.getNSplitter()]; \M4/?<g nEndPos = new long[bean.getNSplitter()]; psb$rbu7[ } 8 Zy`Z ^+CTv gie}k)&M X9^a:7( } W (N@`^ ZJz6{cY ve.rpF\ public void run() [ Fid { kFPZ$8e //获得文件长度
Xrpzc~( //分割文件 +R}(t{b# //实例FileSplitterFetch > <WR]`G //启动FileSplitterFetch线程 g0@i[&A@{ //等待子线程返回 `$|!h-" try{ vJg|}]h>L if(bFirst) +'qzk>B { :(A5,$ nFileLength = getFileSize(); k8E'wN if(nFileLength == -1) ZRYs7 4< { uVJ;1H! System.err.println("File Length is not known!"); $Bd{Y"P@6 } 9)={p9FZY else if(nFileLength == -2) I>X _j) { j'lfH6_')e System.err.println("File is not access!"); ~Ein)5 } ;5tSXgGw7 else c!@g<<}[( { #&vP(4p for(int i=0;i<nStartPos.length;i++) Yrp
WGK520 { qv<[f=X9| nStartPos = (long)(i*(nFileLength/nStartPos.length)); oy90|.]G } 3{o5AsVv for(int i=0;i<nEndPos.length-1;i++) hamn9 { vluA46c nEndPos = nStartPos[i+1]; XYD}OddO } )]Xj"V2 nEndPos[nEndPos.length-1] = nFileLength; V6'"J } [4,=%ez } y~_wr}.CS 2T!pFcc ;2K_u //启动子线程 09y%FzV fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7VkT(xnm
for(int i=0;i<nStartPos.length;i++) aL@myq. { VZNMom,Wr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;' !G?)PZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b;#Z/phix nStartPos,nEndPos,i); mjUln8Jc Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `"J=\3-> fileSplitterFetch.start(); qYj
EQz } X-Y:)UT // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0sW=;R2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); OgjSyzc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /5:C$ik nEndPos = " + nFileLength); Sw~jyUEr // fileSplitterFetch[nPos.length-1].start(); xMI4*4y( ,yW BO D_r&B@4w //等待子线程结束 hR"j[ //int count = 0; CSx V^ //是否结束while循环 U1<EAGo| boolean breakWhile = false; ]v7f9MC'\ der'<Q.U:k UCzIOxp} while(!bStop) S0C
7'H%?# { Y9fktg. write_nPos(); #N\kMJl$l Utility.sleep(500); LU5e!bP breakWhile = true; !MoJb#B3^] t-gg,ttnA p
b:mw$XQ7 for(int i=0;i<nStartPos.length;i++) YX38*Ml+V { Ndq|Hkd if(!fileSplitterFetch.bDownOver) ML?%s` { e
W&;r&26 breakWhile = false; gZ6]\l]J{ break; uev$5jlX } o9-b!I2 } )`?Es8uW if(breakWhile) +$M%"=tk break; qQC<oR
E,,)?^ g tW;?4}JR
//count++; kxU<?0 //if(count>4) 86!"b // siteStop(); 7(B|NYq } Z+h^ ie"g "HTp1 -.=q6N4 System.err.println("文件下载结束!"); "2HSb5b"` } rjfcZ@ catch(Exception e){e.printStackTrace ();} =pQA!u]QE } *x3";%o CYA#: 4G;FpWQm //获得文件长度 [|PVq#( public long getFileSize() x]|8 { .8[B
}S( int nFileLength = -1; ')%Kv`hz try{ %O-RhB4q URL url = new URL(siteInfoBean.getSSiteURL()); iQsv^K!\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W,~s0a! httpConnection.setRequestProperty("User-Agent","NetFox"); -:IG{3fnu VF1)dd +#~=QT9 int responseCode=httpConnection.getResponseCode(); >}{'{
Z
& if(responseCode>=400) g'G% BX { !<\"XxK+l processErrorCode(responseCode); @cNBY7= return -2; //-2 represent access is error SiJ0r
@ } J9J[.6k8 /HR9(j6 't".~H_V String sHeader; *oLAO/)n {B$cd?} _[}r2,e for(int i=1;;i++) 7n W*3( { uJVu:E.#1 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); EacqQFErl //Utility.log(in.readLine()); '^pA%I2D sHeader=httpConnection.getHeaderFieldKey(i); |}zv CD if(sHeader!=null) .`4N#EjP { _%#Q
\D if(sHeader.equals("Content-Length")) -'&4No { Ezw(J[).C nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x 9}D2Ui break; :<Z*WoEmt } n|`L>@aw, } K$_ Rno" else Qd"{2> break; Rz%
Px: M } }m NP[L } e;8>/G catch(IOException e){e.printStackTrace ();} ;EstUs3 catch(Exception e){e.printStackTrace ();} ;}),6R ZM"J5}h z#*M}RR Utility.log(nFileLength); >xu}eWSz QW :-q(s ^L}fj$
return nFileLength; O)C
y4[ } <]I[|4J 7 b%>vhj&F U1(<1eTyu //保存下载信息(文件指针位置) hU=n>g>nx private void write_nPos() /C"dwh"`` { T)Z2=5V try{ 9u<4Q_I` output = new DataOutputStream(new FileOutputStream(tmpFile)); =)5eui>{ output.writeInt(nStartPos.length); XE);oL2xP for(int i=0;i<nStartPos.length;i++) #UGtYD}" { a.)Gd]}g // output.writeLong(nPos); 5_";EED output.writeLong(fileSplitterFetch.nStartPos); TA; output.writeLong(fileSplitterFetch.nEndPos);
8mTjf Br } `?VtB!p@x= output.close(); :Bc)1^I } U085qKyCw catch(IOException e){e.printStackTrace ();} +T:F :X` catch(Exception e){e.printStackTrace ();} +P,hT } \IY)2C<e T'.U?G p~1,[]k //读取保存的下载信息(文件指针位置) J1DX}h] private void read_nPos() b*=eMcd { PY7j uS[+ try{ H&\IgD DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :NJb<%$ int nCount = input.readInt(); *IWO ,! nStartPos = new long[nCount]; z VleJ!d nEndPos = new long[nCount]; @F)51$Ld for(int i=0;i<nStartPos.length;i++) A2 r1%}{ { )@)wcf!b nStartPos = input.readLong(); FNlzpCT~L nEndPos = input.readLong(); 6LZ(bP'd; } ]CyWL6z input.close(); ^sIxR*C[v } {M:Fsay>p catch(IOException e){e.printStackTrace ();}
cl4`FU catch(Exception e){e.printStackTrace ();} 5]cmDk } [?uiM^& ,Zs:e. GKdQ private void processErrorCode(int nErrorCode) vy W/f { 1zNH[
System.err.println("Error Code : " + nErrorCode); #
JHicx\8l } zOA{S~> nWpqAb /h'V1zL# //停止文件下载 oLVy?M%{P public void siteStop() H%NP4pK { B$A`- bStop = true; Lf _`8Ux for(int i=0;i<nStartPos.length;i++) `` (D01< fileSplitterFetch.splitterStop(); 0/?V _ 1iBOf8 5Z{i't0CQ } pk2OZ,14Mj } jSVIO v: //负责部分文件的抓取 ]S+NH[g+ **FileSplitterFetch.java HJ[@;F|aU */ Y6L_
_ RT package NetFox; |&Gm.[IX;q xI?%.Z;*+ x5\C MWW import java.io.*; )G6{JL-I import java.net.*; UD1R_bL} ~oO>6 xaQ]Vjw public class FileSplitterFetch extends Thread { eqD|3YX -g8G47piX: K!^x+B| String sURL; //File URL $%!'c#
F long nStartPos; //File Snippet Start Position -'btKz*9 long nEndPos; //File Snippet End Position $p@V1"x int nThreadID; //Thread's ID 6|gC##T boolean bDownOver = false; //Downing is over @,0W( boolean bStop = false; //Stop identical Pe[~kog,TP FileAccessI fileAccessI = null; //File Access interface Yt79W ?)<DEu:Y ^(7<L<H public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y]$%>N0vLX { Dz$GPA this.sURL = sURL; U{(B)dFTH this.nStartPos = nStart; $%9.qy\8 this.nEndPos = nEnd; EJ7}h?a]U_ nThreadID = id; ^eke,,~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 L+y}hb
r } &P'cf|KI (VeX[*}I b
'p0T1K( public void run() 4PG]L`J{ { \fG?j@Qx while(nStartPos < nEndPos && !bStop) Htd-E^/ { KhK:%1po `l+{jrRb< sd|5oz) try{ kj_o I5<' URL url = new URL(sURL); =`fJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -_&"Q4FR;+ httpConnection.setRequestProperty("User-Agent","NetFox"); 5, String sProperty = "bytes="+nStartPos+"-"; ?K]Cs&E4 httpConnection.setRequestProperty("RANGE",sProperty); #(6^1S%
Utility.log(sProperty); Sx{vZS3 apsR26\^ G3O`r8oZcJ InputStream input = httpConnection.getInputStream(); Gs^hqT;h //logResponseHead(httpConnection); Wj0=cIb n[$b k_S |HhqWja byte[] b = new byte[1024]; J`/ t;xk int nRead; >*/\Pg6^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) q~_DR4xZ { It$'6HV~Sb nStartPos += fileAccessI.write(b,0,nRead); #
+OEO //if(nThreadID == 1) Q/'jwyj_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K,f*}1$qM } M*ZR+pq, )`;Q]?D c^ $_epc* Utility.log("Thread " + nThreadID + " is over!"); LLE\ ;,bv bDownOver = true; dO/iL7K& //nPos = fileAccessI.write (b,0,nRead); rH@{[~p } m~`d<RM/ catch(Exception e){e.printStackTrace ();} rqJ'm?>cr } cm`Jr#kl{ } B!: %^S yV`H_iC 9eOP:/'}w //打印回应的头信息 .W4P/Pw' public void logResponseHead(HttpURLConnection con) -|s
w\Q { mO];+=3v8 for(int i=1;;i++) 39
D!e& { Cu*+E%P9` String header=con.getHeaderFieldKey(i); SM%N]/@U if(header!=null) 7wKN //responseHeaders.put(header,httpConnection.getHeaderField(header)); FKhmg&+> Utility.log(header+" : "+con.getHeaderField(header)); 'T
G43^ else }G8gk"st break; z4GcS/3K } )UBU|uYR\ } %eK=5Er jx Sg#$
B#g x"/DCcZ public void splitterStop() k:1p:&*m { KO*# ^+g bStop = true; KZ8Hp=s } 3<Qe'd
^ %t& k@[\C`P } n=t50/jV3= |qUi9#NUo 25e*W>SLw /* OH.lAF4E( **FileAccess.java 'OrGt_U *//文件访问(定位,写) )Z4ilpU, package NetFox; c*>8VW> import java.io.*; }STTDq4 >4 n\ Kkfz a public class FileAccessI implements Serializable{ *uJ0ZO9
o[$~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 e@6]rl RandomAccessFile oSavedFile; 5"~F#vt long nPos; 8PKUg
"p
6z-ZJ|? NUSb7<s,&Y public FileAccessI() throws IOException D\13fjjHlu { V\1pn7~V this("",0); dnEIR5%+. } =@e3I)D#?i SX/E@vYb Os)jfKn2 public FileAccessI(String sName,long nPos) throws IOException 2A>s
a3\ { ,\fp.K< oSavedFile = new RandomAccessFile(sName,"rw"); * A<vrkHz this.nPos = nPos; \zCwD0Z oSavedFile.seek(nPos); g &E3Wc } <b
JF&, :mYVHLmea c{"=p8F_ public synchronized int write(byte[] b,int nStart,int nLen) {J&[JA\ { ?nf !sJ'm int n = -1; =6.4 try{ /)+V(Jlu oSavedFile.write(b,nStart,nLen); T`ofj7$: n = nLen; G 6r2
" } Jy^.L$bt catch(IOException e) .ei5+?V<i { _%R]TlL e.printStackTrace (); :P'M|U } pY~/<lzW 4D'AAr57 )6!ji]c
N return n; Zk:Kux[7 } OrC}WMhd *J D-|mK If>bE!_BO } Mg"e$m ,1K`w:uhS _O,k0O
/* Q[n*ce7L0 **SiteInfoBean.java }Fq~!D
Ee */ W1;QPdz: package NetFox; Xp67l!{v >TQNrS^$J \rpXG9 public class SiteInfoBean {
;2y4^ =&K8~
iNCT( N~. private String sSiteURL; //Site's URL f>CJ1;][{ private String sFilePath; //Saved File's Path ;% <[*T:*' private String sFileName; //Saved File's Name K[q{)>,9 private int nSplitter; //Count of Splited Downloading File oKMr Pr[` 7 /6Zp? zG*
>g public SiteInfoBean() N^Hj%5 {//nSplitter的缺省值为5 jk\z-hd //default value of nSplitter is 5 '.B5CQ this("","","",5); fxQ4kiI } `GU Gy. b "Snt~:W> pN4gHi= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ?hmuAgOtbh { 8wEUly sSiteURL= sURL; XN&cM,
sFilePath = sPath; \\ZCi`O sFileName = sName; ]N;\AXZ7 this.nSplitter = nSpiltter; gyz_$T@x X,A]<$ACu% ,;@vVm'} } $TX]*hNn -=WQed} 9;7|MPbR public String getSSiteURL() (V x2*Aw] { OLZs}N+ ;] return sSiteURL; Gk']Ma2J} } G' '9eV$ B#;6z%WK dQs>=(|t public void setSSiteURL(String value) a=4 `C*) { r_hs_n!6 sSiteURL = value; >ZwDcuJ~Lz } *djVOC )^`V{iD `iNH`:[w public String getSFilePath() lyD=n { U#G<cV79 return sFilePath; 2!_DkE } .TM.
v5B 2Krh& SE$~Wbj? public void setSFilePath(String value) /.WIED}> { g#q7~#9 sFilePath = value; UOpSH{N }
^o87qr0g] zRMz8IC. r"9hpZH public String getSFileName() I {%Y0S { R > [2*o" return sFileName; Lz&FywF-l } D>-srzw 7<ZGNxZ~ gHtflS public void setSFileName(String value) f hjlt# { hTQ8y10a sFileName = value; (?xR<]~g* } y8ODoXk ,R\e x =c &u!MI public int getNSplitter() -asjBSo*D { tM|/OJ7 return nSplitter; t)5.m} } if?X^j0 S6<#] 6Z =h70!) Z5 public void setNSplitter(int nCount) DYF(O-hJK { QM'|k6 nSplitter = nCount; "%YVAaN } kX2Z@
w` } yAFt|< ;\(LovUy6 *nK4XgD /* lA`qB1x **Utility.java d`,z4_ */ l{gR6U{e package NetFox; i#aKW' o)GesgxFa5 # w@FBFr@ public class Utility { |\Q2L;4C {PkR6.XhR &Oc
`|r* public Utility() fRb { /:v}Ni"6nF `-.6;T}2U D_?dy4\ } 82 dmlPwJC :NL[NbQYt //线程睡眠 J|F!$m{ public static void sleep(int nSecond) ?[|A sw1t { "(iDUl try{ au]W*;x Thread.sleep(nSecond); $:yIe.F } 'h@&rr@5 catch(Exception e) oE_*hp+ { v
8EI e.printStackTrace (); Nt;1&dwUb } e)y+] } /#z"c]# 9C8 G(r //日志 $o.;} public static void log(String sMsg) r0@s3/ { xSqr=^ System.err.println(sMsg); *&tTiv{^ } +s6v!({Z E5#ff5 H|$
*HQm public static void log(int sMsg) GO.7IL{{ { P'o]#Az System.err.println(sMsg); B6j/"x6N15 } ]4r&Q4d>O } c_>AbF{ ]a`"O |S~$IFN4 /* gb4$W@N7V **TestMethod.java Ljiw9*ZI */ >xA(*7 package NetFox; hT,rcIkg: mfF `K2R XH(-anU"!P public class TestMethod { Y
DW^N]G )#GF:.B x3(
->?)D public TestMethod() <$pv;]n { ///xx/weblogic60b2_win.exe cL!A,+S[_ try{ u\MxQIo'u SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); '@
p464 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :xTm-L SiteFileFetch fileFetch = new SiteFileFetch(bean); (74y2U6 fileFetch.start(); V2xvuDHI } BP l% SL catch(Exception e){e.printStackTrace ();} "LH!Trl@k e2BC2K0 f`*VNB` } WgG$ r )#1!%aQ 2#00<t\ public static void main(String[] args) 4"3.7.<Q` { }D?qj3?bj new TestMethod(); SSbx[<E3 } ^7*7^< } uL@%M8n 点击下载更多相关资料
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