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/* Of#u **SiteFileFetch.java V2EUW!gn
2 */ !9e=_mY package NetFox; >uRI'24 import java.io.*; 'JE`(xD import java.net.*; V=l0(03j~ V1zmG y Gb6 'n$g public class SiteFileFetch extends Thread { ebhXak[w u&vf+6=9Dd ; DR$iH-F SiteInfoBean siteInfoBean = null; //文件信息Bean
jB2[( long[] nStartPos; //开始位置 v{4$D~I long[] nEndPos; //结束位置 K5h FileSplitterFetch[] fileSplitterFetch; //子线程对象 t=iIY`Md% long nFileLength; //文件长度 H%tdhu\e boolean bFirst = true; //是否第一次取文件 (%6P0* boolean bStop = false; //停止标志 g$-PR37( File tmpFile; //文件下载的临时信息 9.-S(ZO DataOutputStream output; //输出到文件的输出流 rs[T=C Q ;[DU%f //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) zC!t;*8a public SiteFileFetch(SiteInfoBean bean) throws IOException $h"\N$iSq
{ 9cF[seE"0 siteInfoBean = bean; 8TKnL\aar //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >tr}|> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cuITY^6 if(tmpFile.exists ()) _TZRVa_ { h438` bFirst = false; mq.`X:e read_nPos(); FVKTbvYn } dZ@63a>>@ else {JT&w6Jz { f8dB-FlMm nStartPos = new long[bean.getNSplitter()]; Zu[su>\ nEndPos = new long[bean.getNSplitter()]; 6nvz8f3*r] } Yj49t_$b qy TU8Wp p6V0`5@t $6 f3F?y7 } ^ZcGY+/~ {!L~@r /([kh~a public void run() ;)*eo_tQ { rb.N~ //获得文件长度 r#a=@ //分割文件 x 9fip- //实例FileSplitterFetch S=5o
< 1 //启动FileSplitterFetch线程 ;A*]l'[- //等待子线程返回 a1lh-2xX try{ ?6U0PChy if(bFirst) NXrlk { rEWb" nFileLength = getFileSize(); )ez9"# MH' if(nFileLength == -1) :"c*s4 { ~f98#43 System.err.println("File Length is not known!"); #\m<Sz5Gp# } #*Ctwl,T else if(nFileLength == -2) wIt}dc { F]&*ow System.err.println("File is not access!"); sO@Tf\d } H.MI5O (Q else
&6VnySE? {
P*j|.63 for(int i=0;i<nStartPos.length;i++) OneY_<*a< { |A(Iti{v nStartPos = (long)(i*(nFileLength/nStartPos.length)); +NUG } Nh44]* for(int i=0;i<nEndPos.length-1;i++) kAUymds;O { BI@[\aRLQ nEndPos = nStartPos[i+1]; [nq@m c~< } V0mn4sfs nEndPos[nEndPos.length-1] = nFileLength; a%0EiU } Q7CsJzk~) }
[$UI8tV t]G:L}AOl X:{!n({r= //启动子线程 @H8EWTZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -KbYOb for(int i=0;i<nStartPos.length;i++) !&E-}}< { vl)l' fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jPkn[W#
6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), aN3;`~{9 nStartPos,nEndPos,i); j?QDR Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #/37V2E fileSplitterFetch.start(); $*m-R*kt } YS_;OFsd // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^iYj[~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Wd
ELV3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", *LY8D<:zs nEndPos = " + nFileLength); U6s[`H3I{ // fileSplitterFetch[nPos.length-1].start(); f|(M.U- xT2PyI_: 9>#6*/Oa7 //等待子线程结束 K*d Cc}:` //int count = 0; @C aG9] //是否结束while循环 A3*!"3nU boolean breakWhile = false; %;!.n{X \_f v7Fdp{ |y!A&d=xYn while(!bStop) V=3b&TkE { Flb&B1 write_nPos(); ],].zlN Utility.sleep(500); yB6?`3A: breakWhile = true; 3Zh)]^ TD_Oo-+\ }<:}XlwT% for(int i=0;i<nStartPos.length;i++) 7 X4LJf { \l3h0R if(!fileSplitterFetch.bDownOver) -s/ea~=R { >
Nr#O breakWhile = false; FVBYo%Ap break; NGW xN8P6 } R G`1en } xkAK!uVy if(breakWhile) |Q>IrT break; 0m ? )ROaJ Tm?# M&' 4KrL{Z+} //count++; k VQ\1! //if(count>4) Rlirs-WQ // siteStop(); ?z
u8)U } Rx}Gz$ #LOwGJ$yVz @=kSo
-SX System.err.println("文件下载结束!"); `9.r`&T6K } SX-iAS[< catch(Exception e){e.printStackTrace ();} g=o4Q<
#^y } hR|MEn6KC L8 @1THY "
2Dngw //获得文件长度 f y8Uk; public long getFileSize() =nHgDrA_ { G*v,GR int nFileLength = -1; 7t_^8I%[ try{ KY]C6kh URL url = new URL(siteInfoBean.getSSiteURL()); s"?3]P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3oG,E;( httpConnection.setRequestProperty("User-Agent","NetFox"); {FTqu. xn|(9#1o N)>ID(}F1 int responseCode=httpConnection.getResponseCode(); OK
gqT! if(responseCode>=400) Dn }Jxu'( { '[O;zJN; processErrorCode(responseCode); uSBaDYg return -2; //-2 represent access is error 3{(/x1a,4 } *HB-QIl H7+,* .w,q0<} String sHeader; S#[j )U- Fea(zJ_ G9@0@2aY8 for(int i=1;;i++) o,3a4nH; { sFTy(A/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); eKqk= ( //Utility.log(in.readLine()); #yvGK:F sHeader=httpConnection.getHeaderFieldKey(i); :T(|&F[( if(sHeader!=null) ,wdD8ZT'Ip { Lq!>kT<]! if(sHeader.equals("Content-Length")) ROZF)|l { -RK- Fu<e nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |IUWF%~^$+ break; !_Z&a } W'u># } K,:N else -+-_I*( break; S?BG_J6A7 } qA5r } L\z~uo3: catch(IOException e){e.printStackTrace ();} Yk Qd
catch(Exception e){e.printStackTrace ();} _/<x 2jCf T>`3 2SR: FUV/ Utility.log(nFileLength); I[X772K i8HTzv"J tcog'nAz return nFileLength; ^\,E&=/}M } LvYB7<zk> _``=cc "i W"NFO //保存下载信息(文件指针位置) t}tEvh private void write_nPos() 07=mj%yV { R]*K:~DM try{ i,9)\1R output = new DataOutputStream(new FileOutputStream(tmpFile)); 7EO_5/cY output.writeInt(nStartPos.length); cq4Ipe for(int i=0;i<nStartPos.length;i++) >Wg hn:^ {
ls)%c // output.writeLong(nPos); {h`uV/5@` output.writeLong(fileSplitterFetch.nStartPos); >`ZyG5 output.writeLong(fileSplitterFetch.nEndPos); | (_ } HT1!5 output.close(); ]~hk6kS8Q } L4y4RG/SJ: catch(IOException e){e.printStackTrace ();} h>OfOx/{q9 catch(Exception e){e.printStackTrace ();} G+|` 2an } AbmAKA@ OX\F~+ q.`NtsW!\+ //读取保存的下载信息(文件指针位置) }Y36C.@H private void read_nPos() 7o5BXF { y;@:ulv[ try{ J!U}iD@occ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); {fn!' int nCount = input.readInt(); y>e.~5; nStartPos = new long[nCount]; E\pL!c nEndPos = new long[nCount]; ZSd4z:/ for(int i=0;i<nStartPos.length;i++) s(q_
o { w%BL nStartPos = input.readLong(); 3fQuoQuD"} nEndPos = input.readLong(); ** G9H } _X"N1,0 input.close(); K1!j fp } ]^K4i)\ catch(IOException e){e.printStackTrace ();} )iK6:s# catch(Exception e){e.printStackTrace ();} =xx]@ } ^\&e:Nkh Q9G;V]./ HYSIN^<oy private void processErrorCode(int nErrorCode) +-CtjhoS { eb"5-0 System.err.println("Error Code : " + nErrorCode); 2Gaa(rJ5o } ve2u=eQ1 i|*)I:SHU l u%}h7ng //停止文件下载 R>mmoG}MQ[ public void siteStop() 6- B|Y3)B { $F+ L Ds bStop = true; RMWHN:9 for(int i=0;i<nStartPos.length;i++) +8Ymw:D7a fileSplitterFetch.splitterStop(); Hm'=aff6A bsA-2*Q+ 6?~"V } |kV*Jc k } wLJ:\_Jaf //负责部分文件的抓取 Bj-:#P@ **FileSplitterFetch.java KRMQtgahc */ ^mO~W!" package NetFox; \k!{uRy' YU5(g^< e-#BDN(O import java.io.*; v4c[(& import java.net.*; Y^}Z> qPy1;maXP ~T,c"t2 public class FileSplitterFetch extends Thread { Jx](G>F4f1 A5R<p+t6 (UvM@]B String sURL; //File URL $jI3VB long nStartPos; //File Snippet Start Position Mh/dpb\Z long nEndPos; //File Snippet End Position %r}{hq4 int nThreadID; //Thread's ID T)TfB( boolean bDownOver = false; //Downing is over :AF =<X*5 boolean bStop = false; //Stop identical ;=;
9tX FileAccessI fileAccessI = null; //File Access interface {rH@gz|@i :L RYYw SVs_dG$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6NM:DI\% { !y:vLB#q this.sURL = sURL; ^2on.N q> this.nStartPos = nStart; 2Mvrey) this.nEndPos = nEnd; F9E<K]7K nThreadID = id; Bb^;q#S1 fileAccessI = new FileAccessI(sName,nStartPos);//定位 +|'c>,?2H } _Wp{[TH nv%rJy*w[ fW3(&@ public void run() I]<_rN8~ o { B!_mC<*4`X while(nStartPos < nEndPos && !bStop) (#Gw1 { ?DQsc9y 2s&* rrqR}}l try{ 4Thn])%I URL url = new URL(sURL); Ix!Iw[CNd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L>W'LNXCv httpConnection.setRequestProperty("User-Agent","NetFox"); n%C>E.Tq String sProperty = "bytes="+nStartPos+"-"; NS%xTLow- httpConnection.setRequestProperty("RANGE",sProperty); >eqxV|]i Utility.log(sProperty); t2I5hSf v99B7VH4 uRRQyZ InputStream input = httpConnection.getInputStream(); `V]5 sE]G //logResponseHead(httpConnection); r1.nTO% zHL@i0>^ ICs\
z byte[] b = new byte[1024]; !^=*Jq> int nRead; 1#*a:F&re while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Gh}LlX!w { G!W[8UG nStartPos += fileAccessI.write(b,0,nRead); CBOi`bEf //if(nThreadID == 1) PMh^(j[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f3&[#% } WD2]&g VsgE!/>1 TI#''XCB5 Utility.log("Thread " + nThreadID + " is over!"); LuSLkLN bDownOver = true; R)z4n //nPos = fileAccessI.write (b,0,nRead); (m.ob+D } TRQF^P3o catch(Exception e){e.printStackTrace ();} M?:c)&$]D } QP)pgAc } KgOqbSJ oCi=4#g%7 S\5bmvqP" //打印回应的头信息 #qI= Z0Y public void logResponseHead(HttpURLConnection con)
,
GY h9 { OQT;zqup for(int i=1;;i++) m~Bl*`~M { =fve/_Q~ String header=con.getHeaderFieldKey(i);
HA`@7I if(header!=null) 4EZ9hA9+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); W$rH"_@m Utility.log(header+" : "+con.getHeaderField(header)); M^iU;vo else Tekfw break; 079'(% } %8Dzo } H5]^
6
HwX a,+@|TJ,i y^Kph# F" public void splitterStop() {]_r W/
{ ./D$dbu3 bStop = true; ?a8(azn } UIAj] I_%a{$Gjl psC
mbN } f=!VsR2o DUe&r,(4O :ORR_f`> /* C2xL1` **FileAccess.java ]oV{t<0a *//文件访问(定位,写)
MR,R}B$ package NetFox; UybW26C;aU import java.io.*; n;p:=\uN !F4@KAv |'+eMl public class FileAccessI implements Serializable{ UH>F|3"d U_$qi //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RQp|T5Er* RandomAccessFile oSavedFile; @81Vc<dJ long nPos; L IVU^Os. ^/=#UQ*k nG,U>) public FileAccessI() throws IOException c$`4*6 { :nS;W this("",0); TO*BH^5R } ww{_c]My fr}Eaa-{^ B_l{< public FileAccessI(String sName,long nPos) throws IOException ^(f4*m6` { ZBG}3Z
oSavedFile = new RandomAccessFile(sName,"rw"); TLf9>=
OVh this.nPos = nPos; -;XKcS7Ue oSavedFile.seek(nPos); %Lrd6i_j } u!U"N*Y" a=$t &7;, Q2];RS3. public synchronized int write(byte[] b,int nStart,int nLen) dg7=X{=9jv { ow;R$5G int n = -1; EQIo5 try{ 1?Aga,~k:a oSavedFile.write(b,nStart,nLen); $hVYTy~} n = nLen; n*'<uKpM } LaIJ1jf catch(IOException e) \mN[gT}LHm { Koln9'tB e.printStackTrace (); ~;OYtz } cj|*_} =}fd6ea(o (|fm6$ return n; ] 43bere } /<3<.
~ |m?vVLq q 'a } B)h>8 { i_LF`JhEQT -
?!:{UXl /* Zx?b<"k **SiteInfoBean.java ])#\_'fg */ Q1&P@Io$ package NetFox; <;t)6:N\ %YlTF\- 3Gr&p6 public class SiteInfoBean { ;}.Kb c| '
w y9;#1:ic private String sSiteURL; //Site's URL 9f}XRz private String sFilePath; //Saved File's Path 7/X"z=Q^| private String sFileName; //Saved File's Name %xyX8c{sP private int nSplitter; //Count of Splited Downloading File w3D]~&]
I7\
&Z q bYh9sO/l public SiteInfoBean() cf[vf!vi {//nSplitter的缺省值为5 ?&h3P8 //default value of nSplitter is 5 a%J6f$A# this("","","",5); _b4fS'[ } {rkn q_;0 kJ: 2;t= r.FLGDU public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) KLt%[$CTi { cc> sSiteURL= sURL; ^4`&EF sFilePath = sPath; C'9 1d7E sFileName = sName; X#+`e+Df this.nSplitter = nSpiltter; h[ 6hM^n H]qq ~bO[ mR":z|6 } Zy wK/D IB7tAG8 T }uE0Z, public String getSSiteURL() ]u&dJL { ,bSVVT-b return sSiteURL; O5 7jz= r } K a r~I j=.g:&r) iWXMKu public void setSSiteURL(String value) ^w6eWzI { 5urE sSiteURL = value; Y%vP#>h } ixOw=!@ r2G*!qK*1 Z[,`"}}hv= public String getSFilePath() 135Par5v { U
\Dca&= return sFilePath; -Q`Cq|s } iAz UaF y=o=1( JY4_v>Aob public void setSFilePath(String value) 8SD}nFQ { {u]CHN`%Z sFilePath = value; $k(9 U\y- } eECj_eH- @]3*B%t C/+nSe. public String getSFileName() 7L{li-crI { p6blD-v return sFileName; !=M/j} } 6bL"LM`s lgG8!Ja .D@/y uV public void setSFileName(String value) !yCl(XT { 6IF|3@yD sFileName = value; >
I%zd/q? } UIw?;:Y s4IKSX ip5u_Xj? public int getNSplitter() r|8V @.@i { x\;GoGsez return nSplitter; 3Bd4
C]E } dt.-C_MO zlX!xqHj p[P[#IeL public void setNSplitter(int nCount) 7jZrU|:yu( { |2UauTp5yK nSplitter = nCount; HU3Vv<lz } j[T%'% } er\:U0fr#@ =w ,(M (j`l5r#X#/ /* ArdJ." **Utility.java \R;K>c7= */ T.euoFU{Z package NetFox; k*9%8yi_ U {1 HB!@%,( xf UhSt public class Utility { o(SuUGW 6Wu*.53 InX{V|CW? public Utility() o;'4c { fsb=8>}63} Pu/lpHm| =[8d@d\ } QW:Z[?39^ 0JOju$Bl, //线程睡眠 _9qEZV public static void sleep(int nSecond) i-Ljff { r?XDvU try{ Q~CpP9% Thread.sleep(nSecond); a j_:|]j } R mgxf/ catch(Exception e) 1#kawU6[] { %[+/>e/m e.printStackTrace (); S&`O\!NF } -&~IOqlui } I]UA0[8X mc56L[ //日志 Suj}MEiv public static void log(String sMsg) u;{T2T
{ z+2u-jG System.err.println(sMsg); =1&}t%<X } OUKj@~T {9,R@>R 8s&2gn1 public static void log(int sMsg) _.hIv8V { i&B?4J) System.err.println(sMsg); T7X!#j"\ } EXH!glR[$ } 2tlO"c:_/ 'NRN_c9 Hm<M@M$aG /* w-8)YJ Y **TestMethod.java -{r!M(47 */ f>b!-| package NetFox; 5]Z] j[8Y 7a27^b k.h^ $f public class TestMethod { Xd5!
Ti} &?fvt
c[6 zX#{` public TestMethod() lP-kZA! { ///xx/weblogic60b2_win.exe orK +B4 try{ S So~.)J SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .2{ 6h //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Y#.6d SiteFileFetch fileFetch = new SiteFileFetch(bean); P|yGx)'^P fileFetch.start(); Z@8MhJ } 4E,hcu catch(Exception e){e.printStackTrace ();} 1XC*| Zt7hzW CiHn;-b; } B1up^(? o4U]lK$ 0fZ:")&4, public static void main(String[] args) QJniM"8v { s-Q7uohK new TestMethod(); cG<Q`(5~ } H{&a)!Ms } m.|qVN 点击下载更多相关资料
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