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/* LYM(eK5V **SiteFileFetch.java ]CLt Km */ XNZW J package NetFox; s,~)5nL import java.io.*; >2kjd import java.net.*; Owt|vceT zNg8Oq& 67,@*cK3?J public class SiteFileFetch extends Thread { `]*BDSvE #ArMX3^+w7 d4(!9O.\ SiteInfoBean siteInfoBean = null; //文件信息Bean w+MCOAB long[] nStartPos; //开始位置 !u0|{6U long[] nEndPos; //结束位置 (zv)cw% FileSplitterFetch[] fileSplitterFetch; //子线程对象 #@qd.,]2 long nFileLength; //文件长度 ~m0l_:SF boolean bFirst = true; //是否第一次取文件 pXL@&]U+ boolean bStop = false; //停止标志 b Ag>;e( File tmpFile; //文件下载的临时信息 P`ZYm DataOutputStream output; //输出到文件的输出流 ;~nz%LJ svT1b'=\$I //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~:PuKx public SiteFileFetch(SiteInfoBean bean) throws IOException LA\)B"{J { .LQvjK[N siteInfoBean = bean; @ckOLtxE> //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @)hrj2Jw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); RlW7l1h& if(tmpFile.exists ()) A~Uqw8n$\ { i7 *cpNPO bFirst = false; P R{y84$ read_nPos(); YY? }/r } PNn-@=% else +[2X@J { M?yWFqFt9m nStartPos = new long[bean.getNSplitter()]; ~YYg~6}vV nEndPos = new long[bean.getNSplitter()]; 0nX.%2p#Je } <kY|| "?[7oI}c& $
2/T] (l~3~n } @qGg=)T q/|WkV `m pbM"tr_A{ public void run() Ku
W$ { C/sDyv$ //获得文件长度 ^KK9T5H //分割文件 8N58w)%7` //实例FileSplitterFetch xUG:x4Gz+ //启动FileSplitterFetch线程 4h[S`;D0Vf //等待子线程返回 RR8Z 9D; try{ Nvef+L,v if(bFirst) 4_A9o9&_Rh { `6t3D&.u0 nFileLength = getFileSize(); 1|PmZPKq9n if(nFileLength == -1) /nX+*L}d/ { |>Xw"]b; System.err.println("File Length is not known!"); TYs#v/)I } .x^`y2'U else if(nFileLength == -2) %5zztReI { 9gz"r System.err.println("File is not access!"); qtv>`:neB } Xc^7 else /G>reG,G { j5cc"s for(int i=0;i<nStartPos.length;i++) _`Abz2s { ^edg@fp nStartPos = (long)(i*(nFileLength/nStartPos.length)); BhMHT:m }
W1@Q)i for(int i=0;i<nEndPos.length-1;i++) 9hG+? { YBX7WZCR nEndPos = nStartPos[i+1]; i"rrM1/r
} !`VO#_TJ nEndPos[nEndPos.length-1] = nFileLength; &M,"%w! } BBg&ZIYEh } C~5-E{i E9Q?@' h MKuy?mri~ //启动子线程 GW(-'V/ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q)l]TgvSe for(int i=0;i<nStartPos.length;i++) ^z[-pTY { LX
%8a^?; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xYMNyj~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), JMMsOA_] nStartPos,nEndPos,i); J{Z-4y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zn |=Q$81 fileSplitterFetch.start(); C+WHg-l } ; md{T' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9u 'hCi( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3,K*r"= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", F7(~v2| nEndPos = " + nFileLength); lRn6Zh // fileSplitterFetch[nPos.length-1].start(); J-W,^% GQ-owH] 6g ,U+~ //等待子线程结束 $Xlyc.8YId //int count = 0; r|Y|uv0 //是否结束while循环 tk^1Ga3 boolean breakWhile = false; VD\pQ.= h>Z$
n`T oE&Zf/ while(!bStop) y\
nR0m { ZS uMQ32 write_nPos(); 3q:-98DT Utility.sleep(500); ifu"e_^ breakWhile = true; l|-TGjsX X7sWu{n tPS.r.0#^ for(int i=0;i<nStartPos.length;i++) ksxacRA7\ { `p&ko$i2 if(!fileSplitterFetch.bDownOver) Ne]/ sQ0 { ;y#6Nx,: breakWhile = false; 6TE RQ break; ?l_>rSly5 } b'$j* N } ? OBe!NDf if(breakWhile) eiZv|?^0 break; AJrwl^lm F<?e79},` N(?yOB4gt //count++; GLb}_-| //if(count>4) h^P>pI~ // siteStop(); %PG::b } *@Z/L26s;= `4cs.ab r'hr'wZ System.err.println("文件下载结束!"); #R|M(Z">q } laM0W5 catch(Exception e){e.printStackTrace ();} g 1\4Jb } RB_7S!qC5 gKg2Ntxj 8w|j Z@ //获得文件长度 G'(
%8\ public long getFileSize() 6|#^4D)
{ pBt/vS ad int nFileLength = -1; \n850PS try{ @A6\v+ih URL url = new URL(siteInfoBean.getSSiteURL()); (Jfi 3 m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v&(X&q httpConnection.setRequestProperty("User-Agent","NetFox"); 2
G_*Pqc a#1LGH7E8 qH6DZ| int responseCode=httpConnection.getResponseCode(); QEM")( if(responseCode>=400) yXNE2K { pFSVSSQRV| processErrorCode(responseCode); <Ebkb3_ return -2; //-2 represent access is error hQBeM7$F_ } 0$,Ag;"^? Be2@9 Ms(;B* String sHeader; kq:,}fc;B 9B'l+nP b]s=Uv#) for(int i=1;;i++) mW 5L;> { w;'
F;j~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %_1~z[Dv //Utility.log(in.readLine()); /-$`GT?l sHeader=httpConnection.getHeaderFieldKey(i); Fm-W@ if(sHeader!=null) 3h";
2 { -3VxjycY if(sHeader.equals("Content-Length")) | qHWM { $BE^'5G&4Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8N6a= [fv< break; ^lu)'z%6 } AnPm5i. } /[[zAq{OA else N)RWC7th{ break; 9Pd~ } %@Ks<"9 } fB"3R-H?O catch(IOException e){e.printStackTrace ();} S#+G?I3w catch(Exception e){e.printStackTrace ();} K4n1#]8i 5];
8 ;k7` ` Utility.log(nFileLength); ]Vl5v5_ Ats"iV v5wI?HE return nFileLength; @D"#B@j } q) /;|h *8/Q_w wXZ.D}d //保存下载信息(文件指针位置) jXi<ZJ private void write_nPos() ynM{hN.+ H { gKb4n
Nt try{ ^Sy\< output = new DataOutputStream(new FileOutputStream(tmpFile)); l$,l3 output.writeInt(nStartPos.length); 2t[c^J for(int i=0;i<nStartPos.length;i++) g,y`[dr { 9qXHdpb#g" // output.writeLong(nPos); M=o,Sav5* output.writeLong(fileSplitterFetch.nStartPos); 1a4QWGpq output.writeLong(fileSplitterFetch.nEndPos); +@%9pbM"z } V.Xz
n output.close(); rxa"ji!) } v_c'npC catch(IOException e){e.printStackTrace ();} ![abDT5![ catch(Exception e){e.printStackTrace ();} {, APZ`q| } c#"\&~. P N>ct`a)BD/ w,3`Xq@ //读取保存的下载信息(文件指针位置) -#gb {vj private void read_nPos() ZFW}Vnl { >w
j7Y` try{ nQ$N(2<Fe DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); i'e^[oZ int nCount = input.readInt(); ;\<?LTp/r nStartPos = new long[nCount]; $Q{1^ nEndPos = new long[nCount]; 0M8JE9 Kx for(int i=0;i<nStartPos.length;i++) K:y q^T7 { j&T/.]dX& nStartPos = input.readLong(); N8D'<BUC nEndPos = input.readLong(); QwT]|
6> } qZ\zsOnp input.close(); "mPa>`? } Go`omh
b catch(IOException e){e.printStackTrace ();} o4~ft!> catch(Exception e){e.printStackTrace ();} 3sp*.dk } {f^30Fw )7j"OE E 3I'3 private void processErrorCode(int nErrorCode) n;Iey[7_E` { ['s_qCA[ System.err.println("Error Code : " + nErrorCode); G~B
V^ } >P0AGZ ]NFDE-Jz]
Gzp)OHgJ //停止文件下载 ]LSa(7>EU public void siteStop() 3gabk/ { JyB>,t) bStop = true; Q.yKbO<[ for(int i=0;i<nStartPos.length;i++) 2OT6*+D fileSplitterFetch.splitterStop(); akCl05YW M;iaNL( *|E@81s# } [qZ4+xF,, } s}z,{Y$-t //负责部分文件的抓取 X! 2|_ **FileSplitterFetch.java }SN'*w@E */ oTa! F;I package NetFox;
gA[M +]
5a(/m.~ _r8AO> import java.io.*; \clWrK import java.net.*; so8-e 23OVy^b aSF&^/j public class FileSplitterFetch extends Thread { 6op\g].P RDqC$Gu /GeS(xzQ String sURL; //File URL ZDDwh&h long nStartPos; //File Snippet Start Position ,@!d%rL:4] long nEndPos; //File Snippet End Position WX=+\`NyJ( int nThreadID; //Thread's ID P)\f\yb boolean bDownOver = false; //Downing is over 3\WES! boolean bStop = false; //Stop identical ?Jr<gn^D FileAccessI fileAccessI = null; //File Access interface X_YD[ =f|>7m.p Q`s(T public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException B}FF |0< { 5-3gsy/Mo this.sURL = sURL; 4[-9$
r this.nStartPos = nStart; @'rO=(-b this.nEndPos = nEnd; nx+&
{hn( nThreadID = id; }GC{~
SZ4 fileAccessI = new FileAccessI(sName,nStartPos);//定位 Grub1=6l } 0iB1_)~ 2?ednMoE :_H88/?RR public void run() X@G`AD'.M { -)Vj08aP while(nStartPos < nEndPos && !bStop) ~k%\ LZ3s { Uy_=#&jg $+);!?^|: [5 V try{ (j/O=$mJ URL url = new URL(sURL); =@z"k'Vl` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5a~1RL httpConnection.setRequestProperty("User-Agent","NetFox"); hf-S6PEsM String sProperty = "bytes="+nStartPos+"-"; ,@;<u'1\G httpConnection.setRequestProperty("RANGE",sProperty); [KKoEZ Utility.log(sProperty); AK!G#ug gkdjH8(2 !:8!\gE^P InputStream input = httpConnection.getInputStream(); f,#xicSB* //logResponseHead(httpConnection); ;1 fM L,8 O?!"15 O+N-x8W{ byte[] b = new byte[1024]; dB5DJ:$W$ int nRead; >gE_?%a[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9wC; m : { v+G:,Tc" nStartPos += fileAccessI.write(b,0,nRead); 2$91+N*w9 //if(nThreadID == 1) &g!/@*[Nhh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y
^\8x^Eg } 2&m7pcls \abl|;fj Q [{vU Utility.log("Thread " + nThreadID + " is over!"); :9b RuUm bDownOver = true; ||V:',#,W //nPos = fileAccessI.write (b,0,nRead); 'gGB-=yvbO } U6Ak" catch(Exception e){e.printStackTrace ();} "ivqh{ , } w^gh&E } >gl.(b25C zTLn*? d3GK.8y_z //打印回应的头信息 &[kgrRF@HU public void logResponseHead(HttpURLConnection con) ~<aB-.d { jvQ"cs$. for(int i=1;;i++) )^TQedF { I8?[@kg5b' String header=con.getHeaderFieldKey(i); 919g5f` if(header!=null) l'QR2r7&. //responseHeaders.put(header,httpConnection.getHeaderField(header)); >9`ep7 Utility.log(header+" : "+con.getHeaderField(header)); m+vEs,W. else i7V~LO:gq break; J|-HZ-Wk|J } sFK<:ka } DOe KW
y6}):| SK52.xXJ public void splitterStop() 4Z}{hc\J { ItADO'M bStop = true; l #Q`f. } 7h1gU fh#_Mj+y sE6J:m( } \aIy68rH, Tm\[q OU@x1G{Cy /* V%lGJ]ZEa **FileAccess.java :N*T2mP *//文件访问(定位,写) =joXP$n^ package NetFox; VU9P\|c@< import java.io.*; Cw $^w \F~Cbj+'Nu P*`xiTA public class FileAccessI implements Serializable{ -G#k/Rz6 I!gj; a?R //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4/?}xD|? RandomAccessFile oSavedFile; w9$8t9$| long nPos; RWCS
u$ .To:tN# yPYJc public FileAccessI() throws IOException {yMA7W7] { dM{~Ubb this("",0); $3[\:+ } A(OfG&! ]31XX= ROS"VV< public FileAccessI(String sName,long nPos) throws IOException bs EpET { h6y4Ii oSavedFile = new RandomAccessFile(sName,"rw"); AYIz;BmWy this.nPos = nPos; BK9x`Oo 2 oSavedFile.seek(nPos); FLI8r: } < iI6@X> 3DC%I79 #Jz&9I<OKx public synchronized int write(byte[] b,int nStart,int nLen) bDBO+qA { L8wcH int n = -1; e~.?:7t try{ 6h6?BQSE oSavedFile.write(b,nStart,nLen); cO+Xzd;838 n = nLen; "%''k~UD4 } D%UZ'bHN* catch(IOException e) ywynx<Wg { 7[v@*/W@ e.printStackTrace (); R{uJczu } _T|H69 J a,*p_:~i Yz-JI= return n; uO@3vY',n } Ocwp]Mut& U5CPkH1 ^qGA!_ } 0T#xM( q[K bLEATT[ 3
t8 8AN=4 /* $@_t5?n``F **SiteInfoBean.java 0w(T^GhZ */ r<X 4ER package NetFox; }PQSCl^I XQ3* #CA%]*l*F public class SiteInfoBean { P B( AwXt @!( /MqXwUbO private String sSiteURL; //Site's URL U M( l% private String sFilePath; //Saved File's Path >*= =wlOB private String sFileName; //Saved File's Name qfGtUkSSb private int nSplitter; //Count of Splited Downloading File (#bp`Kih i&pJg1 g+ }s:9 public SiteInfoBean() [.j]V-61 {//nSplitter的缺省值为5 wD6!#t k //default value of nSplitter is 5 FL`1yD^2 this("","","",5); yS)-&t!; } BjyXQ9D j!x<QNNX dY/u<4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J1tzHa6 { w53z*l>ek sSiteURL= sURL; HkdN=q sFilePath = sPath; ,2,SG/BB sFileName = sName; qE0FgqRB this.nSplitter = nSpiltter; df4sOqU AhvvuN$n% T9z4W]T } 6Z(*cf/s `10X5V@hP E kBae= public String getSSiteURL() ]-um\A4f { 3w/( /|0 return sSiteURL; crd|2bjp+ } $5lW)q A =[P%_v`` ~V2ajM1Z&O public void setSSiteURL(String value) 4=Tpi` { .pM
&jni Y sSiteURL = value; L\b]k,Ksf } _%wK}eH+sy -G],H)M gX@nPZjg public String getSFilePath() psIkG0
& { Vk-W8[W 7 return sFilePath; ~reQV6oQua } .3{[_iTM 2{t)DUs {)B9Z
I{+A public void setSFilePath(String value) CKv&Re { w"cM<Ewu sFilePath = value; 4%wq:y<
)/ } $D QD$ .pZ o(* #PPR"w2g public String getSFileName() (2z%U { rIeM+h7W n return sFileName; ;/@?6T" } (8CCesy& \!^i;1h0c3 m[Z6VHn
public void setSFileName(String value) uR#'lb`3 { IQ3n@ sFileName = value; \ Y*h } },DyU bh6d./ >0PUWr$8 public int getNSplitter() f.||PH { LthGZ|> return nSplitter; Dd| "iA } \Yj#2ww 96c"I;\GXX [ njx7d public void setNSplitter(int nCount) XtCoX\da { %_R$K#T^, nSplitter = nCount; *(k%MTG } i"L}!5 } QU:EY'2 PzjaCp' q@w{c= /* 1g1? zk8zO **Utility.java 4P|$LkI */ G%a] j package NetFox; XVw-G
}5 pd d|n2q E;6~RM: public class Utility { uie~' K\y QhsMd-v ?*[\UC public Utility() Oe/6.h? { vQUZVq5M "2a$1Wmj( 0Cl,8P } <B!'3C(P ##H;Yb //线程睡眠 BI};"y public static void sleep(int nSecond) `dDa}b { 2\VAmPG.Zs try{ Yx5J$!Ld Thread.sleep(nSecond); 4E2yH6l } h40'@u^W catch(Exception e) a mqOxb { {>@QJlE0 e.printStackTrace (); ! .AhzU1%Y } %JQ~!3 } Va7c#P? u?F (1iN= //日志 =p]mX)I_ public static void log(String sMsg) )!e3.C|V1W { 9 ~~qAoD System.err.println(sMsg); ^]6M["d/p } ABc)2"i:* RlrZxmPV>O Hle\ON public static void log(int sMsg) :r&iMb:Ra { wUoiXi09 System.err.println(sMsg); Q"%QQo}} } Z?17Pu'Dp } 0#QKVZq2> p%F8'2)} 4U?<vby /* U/Wrh($ #4 **TestMethod.java -/>9c-F */ g<$. - g package NetFox; (?\?it- o~#f1$|Xn 0x@A~!MoP public class TestMethod { p*
RC icE|.[ mQ}Gh_'ps public TestMethod() kn}zgSO { ///xx/weblogic60b2_win.exe {)xWD% try{ GW3>&j_!d SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); xYI;V7 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); O|I+], SiteFileFetch fileFetch = new SiteFileFetch(bean); $Jp~\_X fileFetch.start();
aG(hs J) } w9f
_b3 catch(Exception e){e.printStackTrace ();} hGI+:Js6 Q".g.k =q+R
} Z\Z,,g+WL *YtB )6j Q(Gyq:L=> public static void main(String[] args) ([R")~`(l2 { _({@B`N} new TestMethod(); =A@>I0(7 } qZ*f%L( } '^iUx,,ZQ 点击下载更多相关资料
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