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/* W3\E;C-g0 **SiteFileFetch.java y;<suGl */ #<Xq\yC51 package NetFox; [m6+I9 import java.io.*; fqq4Qc)#U& import java.net.*; hiA\~}sl n Di4GaKa/ >w,jaQ public class SiteFileFetch extends Thread { ED" fi$ XuHR Wi>m}^}9 SiteInfoBean siteInfoBean = null; //文件信息Bean v-q-CI?B# long[] nStartPos; //开始位置 6akI5\b long[] nEndPos; //结束位置 $?]`2*i FileSplitterFetch[] fileSplitterFetch; //子线程对象 *FZav2]- long nFileLength; //文件长度 4#]g852 boolean bFirst = true; //是否第一次取文件 8~s0%%{,M boolean bStop = false; //停止标志 d,Oagx File tmpFile; //文件下载的临时信息 WVOj;c DataOutputStream output; //输出到文件的输出流 %iEdU V\$ NqNU:_} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3(,m(+J[S public SiteFileFetch(SiteInfoBean bean) throws IOException y,ub*-: { udBIEW,` siteInfoBean = bean; N}ND()bf //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); S4{vS?>j tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); .s!0S-RkC if(tmpFile.exists ()) '-[hy>t { gTOx|bx bFirst = false; m6$&yKQ-=h read_nPos(); "e8EA!Ipte } :D-D+x else oSkQ/5hg. { bR~(Ry` nStartPos = new long[bean.getNSplitter()]; _;Xlw{FN^ nEndPos = new long[bean.getNSplitter()]; Nq8 3 6HL } u~Po5W/i {Q_GJ a7F_{Mm Qzo -Yw`= } H.'9]* I}0? d !k*B-@F public void run() _5~|z$GW { _X;,,VEV! //获得文件长度 ZeU){CB //分割文件 wCR! bZ w //实例FileSplitterFetch ecoI-@CAI //启动FileSplitterFetch线程 T#E$sZ //等待子线程返回 YGLq~A try{ v~T)g"_| if(bFirst) i$@xb_ { D6&P9e_5 nFileLength = getFileSize(); jl(D;JnF if(nFileLength == -1) E QU@';~8 { UXdc'i g System.err.println("File Length is not known!"); Qj_)^3`e } zuW4gJ else if(nFileLength == -2) HR8YPU5
{ X';qcn_^ System.err.println("File is not access!"); V6HZvuXV! } jQ%1lQ#R) else "5
~{ { C,W_0=!e for(int i=0;i<nStartPos.length;i++) A:GqR;;"x> { .PVYYhrt nStartPos = (long)(i*(nFileLength/nStartPos.length)); Y9<[n)>+ } +ZW>JjP* for(int i=0;i<nEndPos.length-1;i++) rg
k1.0U0 { d v[.u{#tP nEndPos = nStartPos[i+1]; Y$n+\K } r,0D I nEndPos[nEndPos.length-1] = nFileLength; L/-SWid) } ol/@)k^s> } 7z1@XO<D LmqSxHs0Q r0lI&25w //启动子线程 Tgtym"=xd fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ~K3Lbd|
r for(int i=0;i<nStartPos.length;i++) /}>8|#U3y { jy5[K. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %H" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5CN=a2& nStartPos,nEndPos,i); JmK
)Y# A Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h'=)dFw7 fileSplitterFetch.start(); { >izfG,\ } \i//Aq // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y'odn ; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); mhhc}dS(H // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8~-TN1H nEndPos = " + nFileLength); |^UQVNJ // fileSplitterFetch[nPos.length-1].start(); )^s>2 1 fg#e*7Odn _rIo
@v //等待子线程结束 z[QDJMt> //int count = 0; ,
otXjz //是否结束while循环 Ji9o0Y R boolean breakWhile = false; :'C?uk ? -p)`o b- ^[HUtq while(!bStop) OF']- { "i/GzD7 `n write_nPos(); hDW_a y4 Utility.sleep(500); wdBBx\FP breakWhile = true; 2ns,q0I
A <@ ts[p. l:eC+[_;> for(int i=0;i<nStartPos.length;i++) ~zac.:a8 {
k# Ho7rS& if(!fileSplitterFetch.bDownOver) kJf0..J[#< { 6c-'CW
breakWhile = false; =lk'[P/p` break; Bl6I@w } s-Yu(X2 } <|Lz#iV37 if(breakWhile) T3
ie-G@< break; ,"#nJC hf9i%,J .txtt?ZF2 //count++; 6IT6EkiT //if(count>4) K\xM%O? // siteStop(); XBCHJj]k } T$2A2gb` y< dBF[ x
zF System.err.println("文件下载结束!"); tg#jjXV\0p } 1z&"V}y catch(Exception e){e.printStackTrace ();} 6 *S/frE } *#}=>, v GiuE\J9i (EWGX |QA //获得文件长度 E`^D9:3:) public long getFileSize() |&MoQxw@ { TK'
5NM+4 int nFileLength = -1; ll$mRC try{ uuFQTx)) URL url = new URL(siteInfoBean.getSSiteURL()); &ot^+uVH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <>n|_6'$90 httpConnection.setRequestProperty("User-Agent","NetFox"); 7ixG{yu leNX5 sX 0Q7<;'m int responseCode=httpConnection.getResponseCode(); R-Lpgi<a" if(responseCode>=400) F3!@|/<w { #BBDI processErrorCode(responseCode); &0Y
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return -2; //-2 represent access is error a-,*iK{_u } @"fv[=Xb !=.y[Db= JC~sz^>p\ String sHeader; !]uB4 _^b\#Jz4U3 ]O:8o<0 for(int i=1;;i++) t-C|x)J+ { ]Bf1p //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r-EIoZ"P //Utility.log(in.readLine()); Y)]VlV!` sHeader=httpConnection.getHeaderFieldKey(i); L9Zz-Dr s if(sHeader!=null) =GP L>a& { k CGb~+ if(sHeader.equals("Content-Length")) m ne)c[Qn { ivl %%nY' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $04lL/; break; {4vWSb } [olSgq!3 } CXoiA"P else R#~l[S8u^ break; *.wj3'wV } cyWb*Wv } ~x'8T!M{ catch(IOException e){e.printStackTrace ();} Hc\@{17 catch(Exception e){e.printStackTrace ();} =2GKv7q$x, u?SwGXi~8 cOpe6H6,bz Utility.log(nFileLength); xu-bn ZyNgG9JL] O_2o/ return nFileLength; m2(}$z3e } wY\,b*x
dI7rx+L ke W7pN? //保存下载信息(文件指针位置) r>bgCQ#-n private void write_nPos() pd: YR; { lj&\F|-i try{ RLQ*&[A} output = new DataOutputStream(new FileOutputStream(tmpFile)); s1W n.OGR4 output.writeInt(nStartPos.length); 6 A]a@,PC for(int i=0;i<nStartPos.length;i++) mpwh= { {_\dwe9 // output.writeLong(nPos); z@19gD#8 output.writeLong(fileSplitterFetch.nStartPos); 4|\M`T output.writeLong(fileSplitterFetch.nEndPos); u|$HA>F[ } ShV_8F z output.close(); Lhg } CfrO1i F catch(IOException e){e.printStackTrace ();} & }j;SK5 catch(Exception e){e.printStackTrace ();} *<
fJgc"3 } 5WfZd CL5^>.} 4PS| //读取保存的下载信息(文件指针位置) p</t##]3ks private void read_nPos() 8kU(>' ^_: { q*4@d)_& try{ 'Tqusr>lPY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); p%bMfi*T int nCount = input.readInt(); `]GL3cIh: nStartPos = new long[nCount]; ti1R6oSn nEndPos = new long[nCount]; V :5aq.o! for(int i=0;i<nStartPos.length;i++) };9/J3]m { k??CXW nStartPos = input.readLong(); A9ld9R nEndPos = input.readLong(); Txe*$T,( } c1_Zi input.close(); @zw&-b:qI } SufM~9Ll catch(IOException e){e.printStackTrace ();} _[&.`jTFn catch(Exception e){e.printStackTrace ();} jb/C\2U4) } /\Xe'& fYZd:3VdC pg,JYn private void processErrorCode(int nErrorCode) .sj/Lw} { ]QHZ[C System.err.println("Error Code : " + nErrorCode); CcV@YST? } @m`H~]AU V{>;Z vj1R MoiRAO //停止文件下载 +Gy9K public void siteStop() &y73^"% { ia
/#`#. bStop = true; X[w]aJnAr for(int i=0;i<nStartPos.length;i++) _RzoXn{1e fileSplitterFetch.splitterStop(); CUC]-]8 #]Do_Z ;cL+=! } nHXPEbq-g } /:\27n //负责部分文件的抓取 4UW)XLu6T7 **FileSplitterFetch.java 6=Q6J */ Ax@7RJ|| package NetFox; Q9p2.!/C1 kMEXg zl 3ErV" R4"$ import java.io.*; N@'l:N'f4 import java.net.*; 'MyJw*%b] Ya<KMBi3 q]!FFi{w; public class FileSplitterFetch extends Thread { X>yE<ni TOP,]N/F
H dR,a0+! String sURL; //File URL K!>3`[:I" long nStartPos; //File Snippet Start Position
}7fzEo`g long nEndPos; //File Snippet End Position b/#<::D ` int nThreadID; //Thread's ID l_2l/ff9 boolean bDownOver = false; //Downing is over L4u.cHJ}0 boolean bStop = false; //Stop identical -s0J8b FileAccessI fileAccessI = null; //File Access interface /
)[\+Nc @LU[po1I ~Lu,jLKL=[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e+2lus,u6t { ~<Wa$~oY this.sURL = sURL; +Ezl.O@z this.nStartPos = nStart; I(j{D>v this.nEndPos = nEnd; l.}gWN9- nThreadID = id; Bz:Hp{7& fileAccessI = new FileAccessI(sName,nStartPos);//定位 d|UH AX } b-c6.aKf| h"2^`
)!u vj#m#1\f public void run() \
sz ](X { j~;y~Cx? while(nStartPos < nEndPos && !bStop) l<"B[ { G[zy sxd !([ v=O# 2Qp]r+! try{ C<^S$ URL url = new URL(sURL); _\,4h2( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6is+\ httpConnection.setRequestProperty("User-Agent","NetFox"); rg%m String sProperty = "bytes="+nStartPos+"-"; 3],(oQq^ httpConnection.setRequestProperty("RANGE",sProperty); FY+@fy Utility.log(sProperty); ^:O*Sx.CA K TE*Du DuQ:82 3b InputStream input = httpConnection.getInputStream(); X0$?$ta //logResponseHead(httpConnection); @ <'a0)n> +}-cvM/* FklO#+<: byte[] b = new byte[1024]; h{)`W
]~ int nRead; 1o while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) AMK3I`=8WO { N=8CVI nStartPos += fileAccessI.write(b,0,nRead); to\$'2F"q //if(nThreadID == 1) QX(t@VP // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EScy!p\* } f,-'eW/j cZt5;"xgr] D9r;Ys% Utility.log("Thread " + nThreadID + " is over!"); 4tapQgj24 bDownOver = true; G6"4JTWO //nPos = fileAccessI.write (b,0,nRead); ]zvOM^l~ } T?-K}PUcQ catch(Exception e){e.printStackTrace ();} 7tY~8gQel } itO1ROmu } sQT,@+JEr %Si3LQf 7 :u+-U //打印回应的头信息 yN}<l% public void logResponseHead(HttpURLConnection con) Z>'hNj)ju { I=K<%. for(int i=1;;i++) MY&?*pV) { V5I xZn% String header=con.getHeaderFieldKey(i); iW?NxP if(header!=null) ,#.^2O9-^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 3ZYrNul" Utility.log(header+" : "+con.getHeaderField(header)); rV
I-Yb else `zcpaE.@ break; :\1vy5 _ } W5RZsS] } -dUXd<=ue }-WuHh# @y# u!} public void splitterStop() _x7>d:C { _ 1\H{x bStop = true; qJj5_ } LkXF~ ??P>HVx +$GP(Uu, } %vrUk;<35 maQOU1 T!5g:;~y > /* .lppT)P **FileAccess.java !AL?bW *//文件访问(定位,写) _3_o/I package NetFox; (Z>vbi% import java.io.*; sJLJVSv8c Qhn>aeW, YW-Ge public class FileAccessI implements Serializable{ bEzy KrN\ ,<CzS,( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 lN::veD RandomAccessFile oSavedFile; ?~~,?Uxw! long nPos; NVo=5 <ZeZq D)JI11a< public FileAccessI() throws IOException 7(5 wP( { }9&~+Q2 this("",0); 9t0NO-a } Ml,87fo Gh{vExH@5( 2`h public FileAccessI(String sName,long nPos) throws IOException _&F*4t!n_ { XE*#5u8t oSavedFile = new RandomAccessFile(sName,"rw"); *U4eL- this.nPos = nPos; ljj}XJQ oSavedFile.seek(nPos); 32):&X"AIh } [6a&9#[A 80O[pf*? sMqAuhw$. public synchronized int write(byte[] b,int nStart,int nLen) V8J!8=2 { XiUae{j` int n = -1; >c8EgSZJ try{ >1d`G%KfG oSavedFile.write(b,nStart,nLen); ,7|2K &C5 n = nLen; }o#6g|"\sY } / CVhvK catch(IOException e) (K->5rSU { ^<'=]?xr e.printStackTrace (); C&KH.h/N } HA(G q mmgIV&P Gcu?xG{ return n; 1'[_J } tdB< ?e!mv}B_ ]W 6!Xw)[ } n8>(m, q:ZF6o`Z83 m]:|j[!*M /* th(<S **SiteInfoBean.java WMd5Y`y */ >`c-Fqk package NetFox; YXhxzH hPd keWqL] iOzY8M+N( public class SiteInfoBean { L+y90 T6? Ce1^S[ yGtGhP8 private String sSiteURL; //Site's URL =;^#5dpt$ private String sFilePath; //Saved File's Path seEG~/U< private String sFileName; //Saved File's Name 3 ]}wZY0 private int nSplitter; //Count of Splited Downloading File }
^67HtNQ b7h0V4w $@cg+Xrg1 public SiteInfoBean() .#y.:Pb|e {//nSplitter的缺省值为5 E%6}p++ //default value of nSplitter is 5 7nAB^~)6l this("","","",5); Z-,'M tD } k~ZE4^dM 9.qjEe d@-bt s&3 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) xA>O4SD { h*9s^`9) sSiteURL= sURL; H"A|Z6y$^ sFilePath = sPath; ?4,e?S6,[ sFileName = sName; ZkZTCb`/l this.nSplitter = nSpiltter; 48 `k"Uy 6{p]cr c31k%/. } m#a0HH z tLP {q# 4=E9$.3a public String getSSiteURL() |+Fko8- { w8df-]r return sSiteURL; L^zF@n^5A } w(KB=lA2 WS?"OTH.^\ Hjm public void setSSiteURL(String value) MxO0# { yBwgLn sSiteURL = value; Td !7Rx
_ } VMZ"i1rP as?~N/} Z;bg;@r| public String getSFilePath() 5g3D}F>OJ { DPE]<oM return sFilePath; pO.+hy } s*k[Fbi 9$pQ|e0tJ HTz&h#)JQ public void setSFilePath(String value) 5[_|+ { '% $)"g]/# sFilePath = value; CG(G){u& } bZ.q?Hlfk P<@V e-dpk^- public String getSFileName() O%.c%)4Xo { "[ 091 < return sFileName; CfoT$g } ? LA>5 R7)2@;i Q$NT>d6Q public void setSFileName(String value) Bu\:+3 ) { +&7D
;wj= sFileName = value; "r Bb2. } XUrxnJ4 qMrBTq[ '7UW\KEB[} public int getNSplitter() yrnIQu*Uu { 4ACL|RF)A return nSplitter; mgk<PY } 1I*b7t WxB}Uh fP>*EDn@xg public void setNSplitter(int nCount) H +O7+=& { DRC2U%[ nSplitter = nCount; jW^@lH
EU } ]\y:AkxhJ } b'Scoa7@' tp-PE? ~9Nn8g6 /* gi|j! m **Utility.java 06FBI?;|= */ aB6F<"L, package NetFox; l0^~0xlED N<lO!x1[H* ^a6c/2K public class Utility { '$@bTW #Ont1>T,G bnb:4?d] public Utility() Cx.GEY|0 { A.@S>H'P
biJ"@dm
4 'gDhi!h% } gq|T: dD
Qx[ //线程睡眠 LZirw' public static void sleep(int nSecond) YY\$lM { [ &cCE try{ WJp9io[GM Thread.sleep(nSecond); 2m]CmdV^ } afVl)2h catch(Exception e) n2NxO0 { K'6dlwn). e.printStackTrace (); "enGWIH } KiXRBFo }
F'!pM(+ ]m _<lRye //日志 ,P&.qg i=( public static void log(String sMsg) vhA4ol { hmfO\gc}y System.err.println(sMsg); 5C}1iZEJ } 8U98`#
i g%P6 f s<f<:BC public static void log(int sMsg) ;<j[0~qp: { ?Vy%<f$ System.err.println(sMsg); lV4|(NQ9 } vkFq/+'U } eI%{/> MGt[zLF9 sp=;i8Y 3 /* 8.9Z0 **TestMethod.java tVB9kxtE */ f-lM[\ma_ package NetFox; IYIlab\TZ 1{TmK9U Q{s9{ public class TestMethod { fwe4f >l<`)4*H 8zDLX,M- public TestMethod() 3#O Rfr( { ///xx/weblogic60b2_win.exe ID/=YG@ try{ {yo<19kV@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); I
,j,Hz0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6:Fb>|]*PY SiteFileFetch fileFetch = new SiteFileFetch(bean); L_TM]0D>7 fileFetch.start(); |@6t"P ]@ } :gD=F &V catch(Exception e){e.printStackTrace ();} U3R;'80 f "iu9r%l94 it
Byw1/ } us/}_r74N* ULqFJ*nla ljr?Z,R4 public static void main(String[] args) %25GplMT { d) i:-#Q new TestMethod(); >bwB+-l yL } FTVV+9.l: } 7gX#^YkE+k 点击下载更多相关资料
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