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/* `A#0If **SiteFileFetch.java `I8ep=VZ */ PQUJUs package NetFox; Z3U%Afl2{ import java.io.*; 3WpQzuHPT import java.net.*; h]vEXWpG ] :!^NjO ^r,0aNzAs public class SiteFileFetch extends Thread { 97/ 4J EQQ@nW{; ..5.": SiteInfoBean siteInfoBean = null; //文件信息Bean RXw1HRR$V long[] nStartPos; //开始位置 1bjz :^ long[] nEndPos; //结束位置 6z]y
=J FileSplitterFetch[] fileSplitterFetch; //子线程对象 1'P4{T0 [ long nFileLength; //文件长度 bokr,I3 boolean bFirst = true; //是否第一次取文件 _9dW+ boolean bStop = false; //停止标志 NKc<nYdK? File tmpFile; //文件下载的临时信息 (*kKfg4Wj DataOutputStream output; //输出到文件的输出流 nd$92H nzZs2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Sk-Q 4D^ public SiteFileFetch(SiteInfoBean bean) throws IOException Lyz8DwZ { B6@q`Bmw. siteInfoBean = bean; VK!HuO9l //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $)~ :H- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,&
wd if(tmpFile.exists ()) ]^8CtgC { 9Vl}f^Gn bFirst = false; {|@}xrB read_nPos(); x3sX=jIW_ } wR,}#m, else ' 6)Yf}I { L c
)i nStartPos = new long[bean.getNSplitter()]; >cpv4Pgm nEndPos = new long[bean.getNSplitter()]; abv*X1 } l%xTF@4e 3h$E^" ~7FS'!W,F j#u{(W'r } YkE_7r(1 BHiG3fP m WHyk "l public void run() !p76I=H% { `+0dz, //获得文件长度 e
tL?UF$ //分割文件 |~#A?mK- //实例FileSplitterFetch IVy<>xpt //启动FileSplitterFetch线程 l`uMtv/Wp //等待子线程返回 yo(MJ^=d try{ $|@pY| f if(bFirst) $xK\$kw\ { n^b CrvD nFileLength = getFileSize(); \RtFF if(nFileLength == -1) V(:wYk?ZR { >?_}NZ,y System.err.println("File Length is not known!"); y^[t3XA6Q } 9_4(}|"N| else if(nFileLength == -2) 3t9CN
)* { cucmn*o? System.err.println("File is not access!"); -ssmj8:Q\| } L8H:,} 2 else 1wH6 hN, { 2h#.:!/SMw for(int i=0;i<nStartPos.length;i++) T1R~^x1 { IuA4eDr^Y% nStartPos = (long)(i*(nFileLength/nStartPos.length)); OnhR` } mU for(int i=0;i<nEndPos.length-1;i++) 3ZI:EZ5 { cNN0-<#c nEndPos = nStartPos[i+1]; WnOvU<Z
< } 'Z:wEt! nEndPos[nEndPos.length-1] = nFileLength; KFRf5^ % } J"@X>n } ';!-a]N w^=(:`
54B`T/>R:E //启动子线程 t)uxW
7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; kr@!j@j$ for(int i=0;i<nStartPos.length;i++) 3,`M\#z%K { q317~z_nl fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CrSBN~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N-t"CBTO
nStartPos,nEndPos,i); N=7iQ@{1 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); sdiWQv fileSplitterFetch.start(); _sZ&=-FR } w\UAKN60 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =,C]d~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~kj96w4eAR // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?m+];SJk nEndPos = " + nFileLength); wjZ Q.T! // fileSplitterFetch[nPos.length-1].start(); Gy;Fe= zGNW5S9G mlLqQ< //等待子线程结束 'n1$Y%t //int count = 0; .{ZJywE< //是否结束while循环 J7C?Z boolean breakWhile = false; (C1~>7L CE!cZZ >,tJq% while(!bStop) SS24@:"{ { Slj
U=, write_nPos(); i(.V`G= Utility.sleep(500); A.@wGy4 breakWhile = true; _cC1u7U9 xf8[&? $E[M[1j for(int i=0;i<nStartPos.length;i++) S:Jg#1rww- { ]=ZPSLuEm% if(!fileSplitterFetch.bDownOver) 'h7x@[| { ,3c25.,* breakWhile = false; /er{sKVX< break; Q[aF"5h% } k3e6y } 6Vncr} if(breakWhile) ^i2>Ax&T break; EVBOubV ;DhAw 1 'Z=_zG/RX //count++; vM]5IHqeE //if(count>4) 0%%y9;o // siteStop(); E.sZjo1 } -q[x"Ha% rBU)@I pDG .qKfhHJ System.err.println("文件下载结束!"); o8H\l\( } 98| v.d catch(Exception e){e.printStackTrace ();} FGie*t } TQ:e!
32 \kf
n,m PC+Soh* //获得文件长度 ?Q+*[YEJ5 public long getFileSize() 0UW_ Pbh6 { .w _BA) int nFileLength = -1; NS""][# try{ gdoaXw;Sy URL url = new URL(siteInfoBean.getSSiteURL()); 3Nwix_&S HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p:$kX9mT& httpConnection.setRequestProperty("User-Agent","NetFox"); s-(c-E09 _Ve)M% W8u&5#$I int responseCode=httpConnection.getResponseCode(); w1(5,~OB if(responseCode>=400) ;&f(7 Q+T_ { S 1^t;{" processErrorCode(responseCode); g.blDOmlc return -2; //-2 represent access is error KHx;r@{< } 1*$6u5.=F :is2 &-|x |uz\XK String sHeader; nUVk;0at w-$iKtb. N!ay#V for(int i=1;;i++) ,UC|[-J { m\CU,9;;( //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6R8>w, //Utility.log(in.readLine()); :;hX$Qz sHeader=httpConnection.getHeaderFieldKey(i); !>ZBb\EyK if(sHeader!=null) fx4#R(N { ]q4LNo if(sHeader.equals("Content-Length")) ZREy I(_ { {Y=k`t, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); q4Bw5~n break; *?C8,;=2r } 0-aaLC~Z> } ~;pP@DA else B0p;Zh break; _3N,oCRm } T][c^K* } l+@k:IK catch(IOException e){e.printStackTrace ();} wu11)HFL|z catch(Exception e){e.printStackTrace ();} -|s%5p| uPN^o.,/. _D@QsQ_Z Utility.log(nFileLength); } _];yw Wd(|w8J{a ZAeJTCCk return nFileLength; ]9'F<T= $_ }
v0(}"0 3D5adI<aq" !>!jLZ0 //保存下载信息(文件指针位置) ubsv\[:C private void write_nPos() g`C"t3~%S { =B'Yx try{ i$}G[v<4 output = new DataOutputStream(new FileOutputStream(tmpFile)); )+hJi/g output.writeInt(nStartPos.length); aO ?KRn for(int i=0;i<nStartPos.length;i++) 5T9[a { q o-|.I // output.writeLong(nPos); uh#E^~5S output.writeLong(fileSplitterFetch.nStartPos); a #s
Nd output.writeLong(fileSplitterFetch.nEndPos); <;>k[P' } [;
$:Lr output.close(); I7SFGO } OEzSItAI/[ catch(IOException e){e.printStackTrace ();} )k[XO catch(Exception e){e.printStackTrace ();} `WxGU } ,1!Y!,xy Wnp[8IEU !B{(EL=g //读取保存的下载信息(文件指针位置) 1cMdoQ private void read_nPos() hBcklI { Dp#27Yzc try{ s(s_v ?k DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }TuMMO4+ int nCount = input.readInt(); 1rue+GL nStartPos = new long[nCount]; CN-4FI)1D9 nEndPos = new long[nCount]; ?}W#j for(int i=0;i<nStartPos.length;i++) -;HZ!Lf { CI \O)iB nStartPos = input.readLong(); Bd;EI)JT nEndPos = input.readLong(); $:-C9N29 } yDe*-N\'W input.close(); L"?4}U: } ?;(!(<{ catch(IOException e){e.printStackTrace ();} JJM!pD\ h catch(Exception e){e.printStackTrace ();} 0|0IIgy } ,m7Z w_. 9!2$?xqym -sle7 k private void processErrorCode(int nErrorCode) zH~g5xgh { Aq(, System.err.println("Error Code : " + nErrorCode); 6"rS?>W/mO } FcOrA3tt |\"%Dy[m i*09m^r //停止文件下载 \Km+>G public void siteStop() 7<2?NLE8* { eCg|@d% D bStop = true; lD_iIe~c for(int i=0;i<nStartPos.length;i++) v] Xy^7? fileSplitterFetch.splitterStop(); n4"xVDL h4ghMBo% eSMno_Gt3 } ^;\6ju2 } .>y3`,0h //负责部分文件的抓取 +_f813$C **FileSplitterFetch.java *_Pkb.3R */ jlUT9Zp package NetFox; 8jLO-^X<< s>>lf&7 ,d=Dicaz import java.io.*; RzLeR%O import java.net.*; Z%r8oj\n -*?{/QmKb :4"b(L public class FileSplitterFetch extends Thread { M[R' I;P! $"=0{H.? String sURL; //File URL w%6 L" long nStartPos; //File Snippet Start Position *iPBpEWC long nEndPos; //File Snippet End Position d+8|aS<A int nThreadID; //Thread's ID [t5D d boolean bDownOver = false; //Downing is over )hK;27m4 boolean bStop = false; //Stop identical UC00zW<Z@" FileAccessI fileAccessI = null; //File Access interface 3+M+5 f-}_ >Y:veEa6v6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9!D
c= { :{Iv
]d this.sURL = sURL; U/rFH9e$ this.nStartPos = nStart; '}P$hP_d this.nEndPos = nEnd; h#|A c>fz nThreadID = id; sNC~S%[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 VOp+6ho< } -N2m|%B -PiZvge %9t=Iu* public void run() .8CfCRq { FvBnmYnW while(nStartPos < nEndPos && !bStop) %-NG eN8 { <bBgevL+_K GIUyW mi sPJO&QD try{ DJR r URL url = new URL(sURL); Pj*"2
LBW# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 93Qx+oK] httpConnection.setRequestProperty("User-Agent","NetFox"); Jqt|'G3 String sProperty = "bytes="+nStartPos+"-"; jouT9~[L' httpConnection.setRequestProperty("RANGE",sProperty); 0:>C v<N Utility.log(sProperty); :HN\A4=kc( Ng1[y4R} X,+N/nku InputStream input = httpConnection.getInputStream(); LO,k'gg< //logResponseHead(httpConnection); BOW`{= Xm.["& e= _7Q.cn byte[] b = new byte[1024]; |\q@XCGei int nRead; J)=Ts({ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =Xb:. { ,V=]QHcg nStartPos += fileAccessI.write(b,0,nRead); 95 X6V //if(nThreadID == 1) KWT[b? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DGx<Nys@B } "& q])3h = J`A )WsKkb xgB-m[Xi Utility.log("Thread " + nThreadID + " is over!"); G/}nwj\ bDownOver = true; K6oQx)| //nPos = fileAccessI.write (b,0,nRead); A)o%\j } +}!FP3KgT catch(Exception e){e.printStackTrace ();} AaJnRtBS~ } xy<)zKp } \F),SL _~E_#cNn _VAX~Y] //打印回应的头信息 ltG|#( public void logResponseHead(HttpURLConnection con) k|_LF[* Z { ^9*Jz{e for(int i=1;;i++) SV_b(wP9 { nA XWbavY String header=con.getHeaderFieldKey(i); @?<1~/sfL if(header!=null) 7.1FRxS //responseHeaders.put(header,httpConnection.getHeaderField(header)); )m$i``*<
Utility.log(header+" : "+con.getHeaderField(header)); C]%}L%, else o_%gFV[q break; qu0dWgK } q8fnUK?i } G!m;J8#m( `v1~nNoY ndB*^nT public void splitterStop() -D,kL { JAcNjzL bStop = true; e!O:z } n%:&N ;"DI)hdz &<S]=\ } hvU\l`m {}v<2bS }VXZM7@u /* /7XVr"R **FileAccess.java u1i
?L' *//文件访问(定位,写) ++M%PF [
{ package NetFox; Z "g6z#L& import java.io.*; bjGQ04da 1
gx(L*y, 5_Opx= public class FileAccessI implements Serializable{ ALnE[}N6, 5Lm<3:7Q+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3r,^is RandomAccessFile oSavedFile; @
Yzj long nPos; 91j.%#[v' t_ZWd#x+; 3k?|-js public FileAccessI() throws IOException v?(9ZY] { >>HC| this("",0); >qjV(_?F- } [i)G:8U 9jTm g% 5!^DKyw: public FileAccessI(String sName,long nPos) throws IOException CaqMLi% { lC(g&(\{ oSavedFile = new RandomAccessFile(sName,"rw"); QF`o%mI this.nPos = nPos; uNRT@@oCq oSavedFile.seek(nPos); / :@X< } Luu.p< Z:s:NvFX Pi:=0,"XOp public synchronized int write(byte[] b,int nStart,int nLen) 0}y-DCuQ { |F^h>^
x int n = -1; _a~-B@2g try{ >^hy@m oSavedFile.write(b,nStart,nLen); h|t\rV^ n = nLen;
-z$&lP] } #^oF^! catch(IOException e) (qXl=e8 { &C7HG^;W9 e.printStackTrace (); b9@VD)J0E } \H5{[ZUn VyL|d^'f_ J?N9*ap) return n; o@g/,V $ } s.G6?1VXlY
j8"2K^h=
1|zy6 } 5uufpvah !2Q> b5Pakz=jNM /* 9F"Q2^l' **SiteInfoBean.java /*yPy? */ a2N4Jg@ package NetFox; 4\%XC
F! mrz@Y0mgL ngHPOI16 public class SiteInfoBean { 6$^dOJ_" Ghpk0ia%d eEG]JH private String sSiteURL; //Site's URL gELb(Y\ak private String sFilePath; //Saved File's Path <"XDIvpc%L private String sFileName; //Saved File's Name F"M$ "rC] private int nSplitter; //Count of Splited Downloading File %/x%hs;d FI$#x%A jB-)/8.qk public SiteInfoBean() CD+2
w
cy {//nSplitter的缺省值为5 h8lI#Gs //default value of nSplitter is 5 pe1 _E
KU this("","","",5); B 8ycr~ } ~NtAr1 qxe%RYdA'j qW6}^aa public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) SMdkD]{g { hMiuv_EO! sSiteURL= sURL; b_JW3l sFilePath = sPath; 9&`ejeD sFileName = sName; )c$)am\I{ this.nSplitter = nSpiltter; >av.pJ(> ';z5]O~ -'OO6mU } H^no&$2`1 GxIw4m9 sB,>4*Zd public String getSSiteURL() [o,S.!W8 { X519}
l3 return sSiteURL; Qb;5:U/x } g6. =(je \!tS|h Lx"a #rZ public void setSSiteURL(String value) mTW@E#)n { `1[GY){?) sSiteURL = value; bu2'JIDR } t[ZumQ@HC !F|iL !B3lsXLSY public String getSFilePath() hoQ?8}r: { #`0iN+qh return sFilePath; 7o4 vf~ } rGe^$!QB ^{W#ut>IN cs%NsnZ public void setSFilePath(String value) '0xJp|[xVP { (Q$]X5L sFilePath = value; }bs2Rxkh } cCj pQ e]+ [lq\p@ DjT ekn public String getSFileName() U "qO&;m { -0)So return sFileName; ~"*;lT5KX } B43o_H|s r]=3aebR. j{nkus2 public void setSFileName(String value) Vo%UiVHy { diLjUC`69 sFileName = value; ,QpDz{8 } d\ &jl`8* +(3PY e\ ]rh)AE!Y( public int getNSplitter() "iof -b=ys { 8bX\^&N return nSplitter; \?} {wh8 } A*h)p@3t< rr[9sk`^H bz~-uHC public void setNSplitter(int nCount) _l?5GLl_F$ { f-\l<o( nSplitter = nCount; wBcDL/(> } ~~ON!l9n } Lh &L5p7 c3lfmTT6^ |yI?}zyR /* w?AE8n$8 **Utility.java Oz9k.[j( */ ubhem(p# package NetFox; oh;F]*k6 b>%I=H%g EMH?z2iGd public class Utility { `.dTkL ^}8_tZs8\ f (
`.q public Utility() )^!-Aj\x { U[S;5xeF.j Ze$:-7Czl 7l Aa6"Y68 } P|.KMtG 8I C(( //线程睡眠 nm'm*sU\ public static void sleep(int nSecond) @D"1}CW { S$"A[ try{ 7$GP#V1r/ Thread.sleep(nSecond); f|VP_o< } CRWO R pP catch(Exception e) )m[!HE`cZ { PyHE>C% e.printStackTrace (); !*%3um
} !9o8v0ZI } -T{~m6 gr=ke #
//日志 hJ:Hv.{`)W public static void log(String sMsg) p,D/ Pb8 { yB.6U56 System.err.println(sMsg); c2"eq2'BS } kXX RMR raJyo>xXb5 `T9<}&=! public static void log(int sMsg) ]Wa,a
T' { 4
qW)R{% System.err.println(sMsg); n?,fF( } bM^'q } 72-@!Z0e `hlyN]L y+:< /* cDTDim1F **TestMethod.java GW
$iK@ */ <{-DYRiN package NetFox; 6!Isz1.re N7#GK]n%/} YgWnPp public class TestMethod { "Pys3=h "Ln\ZYB] C1G Wi4) public TestMethod() SwP h-6 { ///xx/weblogic60b2_win.exe y6jTT% try{ %n}]$
d SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); M(3E
b;` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6
*8G e SiteFileFetch fileFetch = new SiteFileFetch(bean); % 9WWBxS fileFetch.start(); *`jEg=) } ZRxB" a' catch(Exception e){e.printStackTrace ();} i&LbSxUh9 3 oWCQ 7SqsVq`[~ } Tf0#+6 1> wOk:Q4OjL Yp
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2< public static void main(String[] args) |R[m&uOib { YT:5J%" new TestMethod(); .HtDcGp } )O&$-4gL' } aVtwpkgZ 点击下载更多相关资料
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