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/* puyL(ohem **SiteFileFetch.java N} h%8\ */ K;ML' package NetFox; t8+93,*B import java.io.*; E,$uNw '] import java.net.*; n)H0;25L )K6{_~Kc\ `j$d(+Gv
public class SiteFileFetch extends Thread { dEp=;b s hzH5K !{XO#e SiteInfoBean siteInfoBean = null; //文件信息Bean _L72Ae(_ long[] nStartPos; //开始位置 xd.C&Dx5 long[] nEndPos; //结束位置 wz#n$W3mGf FileSplitterFetch[] fileSplitterFetch; //子线程对象 R{B~No w3 long nFileLength; //文件长度 U,S286 boolean bFirst = true; //是否第一次取文件 |Wgab5D>V boolean bStop = false; //停止标志 Fo=6A[J File tmpFile; //文件下载的临时信息 ]rm=F]W/n DataOutputStream output; //输出到文件的输出流 iau&k`b` LN^8U //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 0A9cu,ZdUR public SiteFileFetch(SiteInfoBean bean) throws IOException ~e8n yB { /km3L7L%R siteInfoBean = bean; Jp#cFUa t //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); a+i+#*8wm tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); `!8Z"xD
if(tmpFile.exists ()) jY.%~Y1y { e-CW4x bFirst = false; bW|y -GM read_nPos(); m t^1[ } QMY4%uyY! else BSf"'0I& { [ub\DLl nStartPos = new long[bean.getNSplitter()]; Qa%SvA@R nEndPos = new long[bean.getNSplitter()]; 4\3t5n } jayoARUB 2Qj)@&zKe# SAJ=)h~ PsnU5f)` } C=cTj7Ub ~-%A@Lt n}?G!ySg public void run() hzb|: { B$Z!E%a; //获得文件长度 nSiNSLv //分割文件 ZM?r1Z4 //实例FileSplitterFetch ]l'ki8 //启动FileSplitterFetch线程 {@%(0d{n} //等待子线程返回 -`UlntEdZ: try{ [
_$$P* if(bFirst) >xKRU5 { SI9hS4<j nFileLength = getFileSize();
3lN+fQ>)S if(nFileLength == -1) Gp+XM { WU\bJ} System.err.println("File Length is not known!"); W|e> } W!X]t)Ow else if(nFileLength == -2) lg+g:o { Sq,ty{j2% System.err.println("File is not access!"); 4vS!99v) } vBx^zDe else =;=V4nKN { 6%#'X for(int i=0;i<nStartPos.length;i++) -pu\p-Z { CK</2 w+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2A|6o*s" } uyj*v]AE' for(int i=0;i<nEndPos.length-1;i++) }0RFo96)v { u'1=W5$rK nEndPos = nStartPos[i+1]; !?/bK[
P, } :nUsC+oBS nEndPos[nEndPos.length-1] = nFileLength; bicL%I2h } JUFO.m^w } "r"An" |lwN!KVQ, JrTBe73.]j //启动子线程 fZfiiE~7J fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M3 u8NRd5| for(int i=0;i<nStartPos.length;i++) 5I,X#}K[ { ew$Z5N: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AHY)#|/) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), y3]"H( nStartPos,nEndPos,i); %ko 8P Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mU$7_7V~ fileSplitterFetch.start(); vKC&Qi ; } %Qz`SO8x? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #UD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); DG?\6Zh // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", vP?S0>gh nEndPos = " + nFileLength); #.YcIR) // fileSplitterFetch[nPos.length-1].start(); );DIrA 2kq@*}ys s.)w
A`&& //等待子线程结束 T+h{Aeg //int count = 0; %iC63)(M //是否结束while循环 Gx_e\fe-/ boolean breakWhile = false; U&$]?3? nV*sdSt iQC&d_# while(!bStop) ss8v4@C { SVh4)}.x write_nPos(); 2z# @:Q Utility.sleep(500); /exl9Ilt] breakWhile = true; 2(//slP F|`B2Gr Ki6.'#%7 for(int i=0;i<nStartPos.length;i++) NV4W2thYo { /,Id_TTCO if(!fileSplitterFetch.bDownOver) bnu0*Zg> { gGml
c:/J% breakWhile = false; k.[) R@0% break; Jjh!/pWZ4 } &(^u19TKl } X]"OW if(breakWhile) ^>{;9lo< break; VDjIs UUX +/86w59 1|w:xG^ //count++; ?Hxgx //if(count>4) q.[[c // siteStop(); A!Ct,%
} k]9> V@C 6_K#,_oZ aEdJ ri System.err.println("文件下载结束!"); >/kG5]zxY } %]$p ^m catch(Exception e){e.printStackTrace ();} @SG"t,5s } +u:OAsR "gajBY FXEfD" //获得文件长度 DK_v{R public long getFileSize() u!Nfoq&'u { V?dK *8s int nFileLength = -1; ]J=)pDrk try{ /1#Q=T
URL url = new URL(siteInfoBean.getSSiteURL()); xWe1F2nY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vP)~j1 httpConnection.setRequestProperty("User-Agent","NetFox"); Rn_W|" lT!$\E$1
x&oBO{LNK, int responseCode=httpConnection.getResponseCode(); ^_h7!=W if(responseCode>=400) wK`ieHmp { `Mp7}) processErrorCode(responseCode); M#=5u`h return -2; //-2 represent access is error ~2DV{dyj } a;T[%'in y{I[}$k 8 E+C:" String sHeader; 8Pr7aT:, #L=
eK8^e iA{jKk= for(int i=1;;i++) r5da/*G/O { ~G:2iSi(# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v[DbhIXU //Utility.log(in.readLine()); *[~o~e/YCb sHeader=httpConnection.getHeaderFieldKey(i); C5PBfn<j if(sHeader!=null) nC.2./OwMf { !v4j`A;% if(sHeader.equals("Content-Length")) bKJ7vXC05 { yO,`"Dc_0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S<]a@9W break; zpr@!76 } C9Z\G 3 } n.XhK_6n]M else 4J
51i*` break; A1t~&? } p vQK6r } >g"M.gW catch(IOException e){e.printStackTrace ();} ^8l3j4 catch(Exception e){e.printStackTrace ();} 3?Eoj95w! X8SRQO^ \pD=Lv9 Utility.log(nFileLength); V52C,]qQH l8AEEG8> h k!, return nFileLength; QT= ,En } sqpOS!] hB}h-i(u ]baaOD$Z //保存下载信息(文件指针位置) ]F*a PV private void write_nPos() m_Ac/ctf { Ao,!z try{ O][Nl^dl output = new DataOutputStream(new FileOutputStream(tmpFile)); [+MX$y output.writeInt(nStartPos.length); Xz.Y-5) for(int i=0;i<nStartPos.length;i++) $K_YC~ { 2
ssj(Qo // output.writeLong(nPos); fxoi<!|iGY output.writeLong(fileSplitterFetch.nStartPos); Ag4Ga?&8ec output.writeLong(fileSplitterFetch.nEndPos); YyJ{ } Z'*Z@u3 output.close(); 87pXv6'FQ } hKZ`DB4 catch(IOException e){e.printStackTrace ();} ,WB_C\.#XN catch(Exception e){e.printStackTrace ();} Z-h7 } )x8;.@U Ds%&Mi 1^f.5@tV //读取保存的下载信息(文件指针位置) =1
BNCKT< private void read_nPos() ~l*?D7[o { hUT^V( try{ v]{uxlh DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); o%WjJ~!zL int nCount = input.readInt(); w0j/\XN2s nStartPos = new long[nCount]; yB4H3Q ) nEndPos = new long[nCount]; 8lWH=kA\ for(int i=0;i<nStartPos.length;i++) {`H<=h__ { M9s43XL(& nStartPos = input.readLong(); m&`(pf4A nEndPos = input.readLong(); Gkv~e?Kc~^ } \SiHrr5 input.close(); puS&S
* } Q1nDl catch(IOException e){e.printStackTrace ();} hP1
l v7P catch(Exception e){e.printStackTrace ();} WfDX"rA } a\{1UD ]KXMGH_ K4k~r!&OU private void processErrorCode(int nErrorCode) M6jp1:ZH2q { ![@T iM System.err.println("Error Code : " + nErrorCode); )v52y8G-p }
4j@i% 5K ,#4EOV IObx^N_K //停止文件下载 _}e7L7B7g public void siteStop() %/y`<lJz( { Z6^QB@moj bStop = true; @1qdd~B} for(int i=0;i<nStartPos.length;i++) n|x$vgb fileSplitterFetch.splitterStop(); 1@%B? 2<'`^AO@ e`Co,>W/ } ?jri!]ux# } -*|:v67C& //负责部分文件的抓取 /BMtcCPG! **FileSplitterFetch.java ms}f>f= */ `s`C{|wv package NetFox; /}w#Jk4pD y7JZKtsFA WgA`kT import java.io.*; ^Ue0mC7m import java.net.*; bR`rT4.F JAlU%n?R izPh1YA public class FileSplitterFetch extends Thread { w{3Q( =& pd4cg?K -]Q(~'a String sURL; //File URL 6P~aW long nStartPos; //File Snippet Start Position -=$% { long nEndPos; //File Snippet End Position Z&FkLww int nThreadID; //Thread's ID x"
'KW
( boolean bDownOver = false; //Downing is over K DYYB6| boolean bStop = false; //Stop identical {)V? R FileAccessI fileAccessI = null; //File Access interface >*dQqJI kDzj%sm! =n-z;/NL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException WY+(]Wkao { LY-lTr@A^
this.sURL = sURL; }iilzE4oH# this.nStartPos = nStart; "v(G7*2 this.nEndPos = nEnd; xfq]9< nThreadID = id; F#(.v7Za fileAccessI = new FileAccessI(sName,nStartPos);//定位 ch@x]@-;A3 } >dpbCPJ9[ Ag0]U yjEI/9_ public void run() Bx(yu'g|a { ! FNf>z+ while(nStartPos < nEndPos && !bStop) 5x8'K7/4. { YywEZ?X ],8;eq%W) E:
9o;JU try{ %
f2<U;ff URL url = new URL(sURL); ?ork^4 $s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); cYGRy,'gH httpConnection.setRequestProperty("User-Agent","NetFox"); 1~%o}+#- String sProperty = "bytes="+nStartPos+"-"; ,e9CJ~a httpConnection.setRequestProperty("RANGE",sProperty); zKLn!b#> Utility.log(sProperty); NSw<t9Yi XQ]`&w( g b -Bxf InputStream input = httpConnection.getInputStream(); ngP7'1I //logResponseHead(httpConnection); 2~f6~\4GL+ NB EpM $ye^uu;Z byte[] b = new byte[1024]; xXF2"+ int nRead; W_^>MLq while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ajW[eyX { jFtg.SD nStartPos += fileAccessI.write(b,0,nRead); $#5klA //if(nThreadID == 1) %drJ p6n% // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 81Z4>F: } Qi_&aU$>lM bA9CO\Pp` $^t<9"t Utility.log("Thread " + nThreadID + " is over!"); ,Ij=b bDownOver = true; b SQRLxF //nPos = fileAccessI.write (b,0,nRead); )8;{nqoC } j"5Pe catch(Exception e){e.printStackTrace ();} xw ?CMA } (@ "=F6P } v"rl5x 2G?$X? 1t+%Gv^sK //打印回应的头信息 tJ"az=? public void logResponseHead(HttpURLConnection con) Yi 6Nw+$ { Rho5s@N 7 for(int i=1;;i++) -Q#o)o
{ HOfF"QAR$ String header=con.getHeaderFieldKey(i); Q uB+vL if(header!=null) yz?q(] //responseHeaders.put(header,httpConnection.getHeaderField(header)); @rF/]UJ Utility.log(header+" : "+con.getHeaderField(header)); 1!!\+
c2* else RU6KIg{H break; Ls]@icH0 } r*chL&7 } i^WIr h3a lzEb5mg W6vf=I@f public void splitterStop() AM'gnP> { *8PN!^ bStop = true; +P|2m"UA } vv &BhIf3 D}w<84qX n12UBvc}% } W2`.RF^ 7F9;Su3. `)$`-Pw* /* nTs/Q V **FileAccess.java 3YW=||;|Yg *//文件访问(定位,写) p#bhz5&/ package NetFox; ryg4hHspl import java.io.*; -ui<E?v .]P2}w)x? &'s^nn] public class FileAccessI implements Serializable{ 8V-,Xig;` ACb/ITu //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 s"i~6})K<$ RandomAccessFile oSavedFile; ,t1vb3 long nPos; (= 9wo hT'=VN M'q'$)e public FileAccessI() throws IOException G+VD8]!K1 { =h|wwQE this("",0); rnO0-h-; } +dw!:P& =NZ[${7mq D<t~e$ H public FileAccessI(String sName,long nPos) throws IOException |g<* Rk0
{ i?;R}%~ oSavedFile = new RandomAccessFile(sName,"rw"); {^J!<k,R\; this.nPos = nPos; wz#A1F oSavedFile.seek(nPos); z1vw'VT> } 7d;pvhnH 'z5h3J V@% public synchronized int write(byte[] b,int nStart,int nLen) \gItZ}+c4} { E"#Xc@ int n = -1; 1CkdpYjsj try{ mibpG9+d oSavedFile.write(b,nStart,nLen); VYaSB?`/ n = nLen; ^ S } X\\7$ catch(IOException e) Q`A6(y/s? { @*(4dt:V e.printStackTrace (); "Z T.k5Z } _yv Luj |CIC$2u f@@s1gdb return n; blahi]{Y9 } #r<?v R*9NR,C wAFW*rO5o } ]\Xc9N8w Gf0,RH+ 02\JzBU /* m!O;>D **SiteInfoBean.java !8R@@,_v */ }HRK?.Vj: package NetFox; *5OCqU+g BAV>o|-K C!&y public class SiteInfoBean { ,%W<O. inAAgW#s} c*;7yh&% private String sSiteURL; //Site's URL I
:)W*SK private String sFilePath; //Saved File's Path \NK-L."[ private String sFileName; //Saved File's Name }$kQs!# private int nSplitter; //Count of Splited Downloading File Qx)Jtb0`V h2w}wsb0l l&W;b6L public SiteInfoBean() y3eHF^K+$ {//nSplitter的缺省值为5 >MG(qi //default value of nSplitter is 5 2(M6(xH> this("","","",5); #yW\5) } o>?*X(+le AIRr{Y bMKL1+y( public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) QI}E4-s8 { U#
JIs sSiteURL= sURL; ~AZWds(,N sFilePath = sPath; nfdq y) sFileName = sName; ` ;)ZGY\ this.nSplitter = nSpiltter; o.7{O,v 5$rSEVg9 h}L}[
} fuX'~$b.fA EQ<RDhC@b nSx]QREL! public String getSSiteURL()
Paj vb-f { r~7:daG* return sSiteURL; =f1B,%7G+5 } hs+kr?Pg` T
vtm`Yk\ {9LWUCpsf public void setSSiteURL(String value) Bs;|D { 0;.<~;@h sSiteURL = value; JkQ\)^5v } ;V5yXNQ ~1kXUWq3 k2 Q
qZxm! public String getSFilePath() v~|?3/{Q { (% _n!ip^ return sFilePath; f)Xr!7 } {ZsdLF# 0?0Jz 'CR)`G_'[ public void setSFilePath(String value) ve6w<3D@ { Wu1{[a| sFilePath = value; ]J7Qgp)i } 9`Q<Yy"du $s5a G)?7 ^U[D4UM public String getSFileName() :dI\z]Y( { MXD4|r( return sFileName; @b#^ - } k1
-~ t*XN_=E$f FFKGd/:! public void setSFileName(String value) \ I`p|&vG { wzCUZ1N9q sFileName = value; sTRJ:fR } je/!{( O,@~L$a:YZ I=DxRgt public int getNSplitter() 7q=G&e7 { K(}AX+rIg return nSplitter; MrRaU x6z } 1.<q3q Zw1U@5}A ^P'{U26 public void setNSplitter(int nCount) 'x"08v$ { !h[VUg_8 nSplitter = nCount; XFVV},V
} lj=l4 &.i } *l&S-=] 5Por "&% ]b/S6oc6 /* m!tx(XsXU **Utility.java Z;l`YK^- */ Ev"|FTI/ package NetFox; \55VqGyxu9 @%ip7Y]e RoGwK*j0+ public class Utility { W,^W^:m-x Gq<X4C#| Z6p5*+ public Utility() T:]L/wCj { BQH}6ueZ !TM*o+; =3ioQZ^Vz } _5
^I.5Z3 'B5^P //线程睡眠 ?S$i?\Qh public static void sleep(int nSecond) l:#-d.z# { )rW&c-' try{ :r#)z4d5 Thread.sleep(nSecond); azQ D> } ev1 W6B-a catch(Exception e) 8lF\v /vN { 1NQbl+w#I e.printStackTrace (); lKWPTCU } ~S,p?I } mrIh0B:` 7\]E~/g //日志 7/7Z` public static void log(String sMsg) sg'pO*_& { /S5|wNu System.err.println(sMsg); (+uj1z^ } tGA :[SP [r+ZE7$2b" hpTDxh'?$C public static void log(int sMsg) ui q^|5Z { qyC=(v System.err.println(sMsg); 'r1LSht' } )^||\G } zDhB{3-Q1{ <f CKUc g~V+4+ /* qd3Q}Lk **TestMethod.java No]~jnqDM */ o<IAeH {+ package NetFox; /~*_x=p: Lip4)Y [ ,p(<+6QZ public class TestMethod { 76hOB@ 3rLTF\ 8k
q5ud public TestMethod() !Z
VU,b> { ///xx/weblogic60b2_win.exe _iNq"8>2 try{ ~{sG| ;/!* SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); !EUan //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Bqma\1cgb SiteFileFetch fileFetch = new SiteFileFetch(bean); W>-Et7&2 fileFetch.start(); A_Frk'{qhB } 4DZ-bt' catch(Exception e){e.printStackTrace ();} "-@[R 4_Dp+^JF `u>4\sv } {*{Ox[Nh{ Eu"_MgD 'y8]_K* public static void main(String[] args) U9b?i$ { ~4"qV_M new TestMethod(); WAdCF-S } 4pw6bK,s2\ } q6YX M 点击下载更多相关资料
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