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/* 5M~\'\; **SiteFileFetch.java <dzE5]%\ */ Xv'M\T}6C+ package NetFox; bf
`4GD( import java.io.*; _?3bBBy import java.net.*; bgd1j,PWbW B_[^<2_ 'Z-jj2t} public class SiteFileFetch extends Thread { G1Cn[F;e }0T1* .Cz i+&*W{Re SiteInfoBean siteInfoBean = null; //文件信息Bean "6n~,$ long[] nStartPos; //开始位置 Pb.-Z@ long[] nEndPos; //结束位置 A8OV3h6] FileSplitterFetch[] fileSplitterFetch; //子线程对象 S*:b\{[f> long nFileLength; //文件长度 ;""V s6 boolean bFirst = true; //是否第一次取文件 C CX\"-C boolean bStop = false; //停止标志 ]7ROCJ; File tmpFile; //文件下载的临时信息 77OH.E|$ DataOutputStream output; //输出到文件的输出流 Xb42R1 "j9,3yJT //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) QhK]>d. public SiteFileFetch(SiteInfoBean bean) throws IOException "7RQrz { C} +w< siteInfoBean = bean; jd=k[Yqr //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); O'" &9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v\t$. _at if(tmpFile.exists ()) r}9qK%C G. { MZE8Cvq0 bFirst = false; x<"e} Oo read_nPos(); k:<yy^g$X } TC3xrE:U<m else y1/$dn { Fp-d69Npo nStartPos = new long[bean.getNSplitter()]; `w]=xe nEndPos = new long[bean.getNSplitter()]; VVvV]rU~ } F`U%xn, eQno]$-\ DPi%[CRH y-{^L`%Mk } H(!)]dO cI'&gT5 [a5L WW public void run() 6.2_UN^< { 1,Uv;s;{ //获得文件长度 nvxftbfE^D //分割文件 ju(&v*KA //实例FileSplitterFetch k#E D#']N //启动FileSplitterFetch线程 IC/'<%k //等待子线程返回 $TL~SVHj;{ try{ Sq}hx if(bFirst) H
|Z9]+h)7 { Z=
dEk` nFileLength = getFileSize(); 'i{kuTv if(nFileLength == -1) v$w!hYsQ { fC2e}WR System.err.println("File Length is not known!"); ;_,= } I)]wi% else if(nFileLength == -2) GrW+P[j9 { <u*~RYA2 System.err.println("File is not access!"); 'AE)&56 } %w,
else v1QE|@ { &|IY=$- for(int i=0;i<nStartPos.length;i++) ^{_`jE { <jQ?l%\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9@#Z6[=R, } u} JL*}Q for(int i=0;i<nEndPos.length-1;i++) ^LE`Y>&m { j\("d4n%C nEndPos = nStartPos[i+1]; $OHY^IE( } #]oVVf_ nEndPos[nEndPos.length-1] = nFileLength; YL=?N k/ } AM1 J ^Dp } A}FEM[2 ^*
^te+N A{Z=[]r1`E //启动子线程 d3+pS\&IX? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; [P]zdw
w# for(int i=0;i<nStartPos.length;i++) :O{`!&[>L { ync2X{9D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9Y- Sqk+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D:U:( pg nStartPos,nEndPos,i); s@E"EWp0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YW}q@AY7 fileSplitterFetch.start(); Bl2y~fCA } KTD# a1W // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =M>1;Qr<Z/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +#}I^N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a=&a)FR nEndPos = " + nFileLength); =LL5E}xP // fileSplitterFetch[nPos.length-1].start(); ^1BQejD r;t0+aLc* d,CtlWp //等待子线程结束 PGsXB"k<8 //int count = 0; "D'A7DA //是否结束while循环 .dt7b4.kd boolean breakWhile = false; #Sr_PEo
_ XL>cTM %kS +n_* while(!bStop) x1W<r)A )r { }+h/2D write_nPos(); d_BECx<\ Utility.sleep(500); Eg-3GkC breakWhile = true; B\wH`5/KW 7c1xB.g
Gy
hoo'< for(int i=0;i<nStartPos.length;i++) r`pg`ChHv { %<CahzYc6 if(!fileSplitterFetch.bDownOver) Wp`wIe6 { _(&^M[O breakWhile = false; QU_O9 BN break; N W :_)1 } oJ\UF S } '3O@Nxof4 if(breakWhile) ^6bU4bA break; w7cciD| U+F?b\ t8DySFT //count++; iY1%"x //if(count>4) <UOx >=h // siteStop(); m!3b.2/h } 1P:r=Rt/ `=g9Rg/< S#Tc{@e System.err.println("文件下载结束!"); T$5u+4>" } i\lur ET catch(Exception e){e.printStackTrace ();} ZdJwy% } aN?{MA\ U~n>k<`sr hqIYo
.< //获得文件长度 5@ecZ2`)+h public long getFileSize() 55MrsiW { u[q1]] int nFileLength = -1; l2QO\O
I9m try{
]fvU}4! URL url = new URL(siteInfoBean.getSSiteURL()); 4nQk*:p(X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =p,+a/* httpConnection.setRequestProperty("User-Agent","NetFox"); WL$nchS9 aT1T.3 a p%toD{$ int responseCode=httpConnection.getResponseCode(); 8d|omqe~P if(responseCode>=400) ^-?5=\`5 { S=H<5*]g processErrorCode(responseCode); ++n"`
]o, return -2; //-2 represent access is error 6nqG;z-IXJ } ,#3u.=IR[ L1A0->t ?muI8b String sHeader; 4A6D>ChB'E Vw.c05 x X~ |P for(int i=1;;i++) )nmLgsg { ):OGhWq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 86igP //Utility.log(in.readLine()); ~CiVLSH= sHeader=httpConnection.getHeaderFieldKey(i); ~L $B]\/A5 if(sHeader!=null) _i{$5JJ+K2 { S`HshYlE q if(sHeader.equals("Content-Length")) m99j]wr~c { =!u9]3) nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Rj 2N+59rg break; /cHd&i,> } [lZo'o } SQ!wq else ^Y z.,!B[ break;
$0>>Z } GWo^hIfJ } sf )ojq6s catch(IOException e){e.printStackTrace ();} eAKK uML catch(Exception e){e.printStackTrace ();} R|aA6} /I n!=%MgF'*p EV{kd.=f Utility.log(nFileLength); '{=dEEi 1-[~} ~>u]ow= return nFileLength; mi9B C9W( } "Y0:Y?Vz" *)0bifw$& gI8r SmH //保存下载信息(文件指针位置) &Fo)ea private void write_nPos() PhBdm'
{ q>:>f+4 try{ 7 j$ |fS output = new DataOutputStream(new FileOutputStream(tmpFile)); ;AyE(|U+ output.writeInt(nStartPos.length); W/_=S+CvK for(int i=0;i<nStartPos.length;i++) F[PIo7?K { [<SM*fQ>t // output.writeLong(nPos); \`?#V xz output.writeLong(fileSplitterFetch.nStartPos); .3WDtVE output.writeLong(fileSplitterFetch.nEndPos); EWuuNf } x xxM output.close(); _/;k;$gDp } &'`q&U1x catch(IOException e){e.printStackTrace ();} Vj?{T(K1[ catch(Exception e){e.printStackTrace ();} M`IiK+IoU } E^uau=F C"l_78 "q@OMf //读取保存的下载信息(文件指针位置) lrSdFJ% private void read_nPos() BG:l Zj'I { 6&/H
XqP try{ F02S(WWo; DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); b]S4\BBT int nCount = input.readInt(); [pMJ9
d$ nStartPos = new long[nCount]; xbJ@ z{ nEndPos = new long[nCount]; Wy^43g38'p for(int i=0;i<nStartPos.length;i++) _22;hnG<iy { me]O nStartPos = input.readLong(); 9F+i+(\,b nEndPos = input.readLong(); m NkS!(L6 } ,4dES|)sP input.close(); }G^Bc4@b } 0CXh|AU catch(IOException e){e.printStackTrace ();} p\lS)9 catch(Exception e){e.printStackTrace ();} S%KY%hUt } *p!K9$4 bz!9\D|h hKq <e%oVH private void processErrorCode(int nErrorCode) W\09hZ6 { r~q*E'n System.err.println("Error Code : " + nErrorCode); s+Qm/ h2 } Mazjn?f }`k >6B J
}izTI //停止文件下载 jU')8m[ public void siteStop() +$i-"^ { ,arFR'u> bStop = true; _r!''@B for(int i=0;i<nStartPos.length;i++) o6f^DG3* fileSplitterFetch.splitterStop(); w)I!q&`Y =6j4_+5mnH LL,&!KW[S } s8w7/*<d } -:9E+b //负责部分文件的抓取 ~F7 +R **FileSplitterFetch.java fdr.'aMf% */ # Sfz^
package NetFox; BNU]NcA#*, 'Y23U7 n0B hpJ[VKe import java.io.*; MGn:Gj"d import java.net.*; O+Z[bis` h%e}4U@X yjCY2T E public class FileSplitterFetch extends Thread { (QQ /I; @l3L_;6a 4>]^1J7Wz String sURL; //File URL 3md yY\+& long nStartPos; //File Snippet Start Position P;jl!o$ long nEndPos; //File Snippet End Position E<]l]? int nThreadID; //Thread's ID ?>47!):-* boolean bDownOver = false; //Downing is over #"|Y"#@k boolean bStop = false; //Stop identical 0ZQ|W%tS FileAccessI fileAccessI = null; //File Access interface y7M" Dr%t^ `5}XmSJ?5 12)~PIaF public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ju8mO& { =x
"N0p this.sURL = sURL; 2!QS&i this.nStartPos = nStart; ?_9cFo59: this.nEndPos = nEnd; |
>xUgpQi nThreadID = id; :CEhc7gU fileAccessI = new FileAccessI(sName,nStartPos);//定位 >W2Z]V
} G
hH0-g{- e*gCc7zz hg7`jE&2 public void run() d!)
&@k { ,sPsL9]$ while(nStartPos < nEndPos && !bStop) rtcY(5Q { 9ls<Y FY"!%)TV v ?@Ys+V try{ H?8uy_Sc URL url = new URL(sURL); \~ O6S`, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2d+IROA httpConnection.setRequestProperty("User-Agent","NetFox"); )W9$_<Z String sProperty = "bytes="+nStartPos+"-"; @ -pi httpConnection.setRequestProperty("RANGE",sProperty); CFD& -tED& Utility.log(sProperty); p1t9s
N, "El$Sat` +=I_3Wtth InputStream input = httpConnection.getInputStream(); u->UV:u //logResponseHead(httpConnection); ]D&$k P( W&`_cGoP k^I4z^O=-; byte[] b = new byte[1024]; D6Ov]E:fa int nRead; ji{V# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) d|Wpub { cw#p!mOi~ nStartPos += fileAccessI.write(b,0,nRead); 7V?]Qif~ //if(nThreadID == 1) H~RWM'_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2&fIF}vk>m } vW6Pf^yJ Vf6lu)Zc1 mJb>)bOl Utility.log("Thread " + nThreadID + " is over!"); Er}
xB~<t bDownOver = true; '3=[xVnv //nPos = fileAccessI.write (b,0,nRead); Uxx=$ } -WP_0 catch(Exception e){e.printStackTrace ();} qNER 6 } Q%~b(4E^7P } {>>ozB. p"ht|x FCQI fJ# //打印回应的头信息 8^ju= public void logResponseHead(HttpURLConnection con) w#k'RuOw5 { QFIdp R. for(int i=1;;i++) X
tZ0z? { g<oSTAw String header=con.getHeaderFieldKey(i); y]eH@:MJ;A if(header!=null) hf P}+on% //responseHeaders.put(header,httpConnection.getHeaderField(header)); #
4`*`)% Utility.log(header+" : "+con.getHeaderField(header)); 3EB8ls2 else 1R9hA7y&,/ break; LoUi Yf } C)`ZI8 } |mV*HdqU OtJYr1:y_ LKY4rY!|@d public void splitterStop() MdT'xYomzQ { tDFN
*#( bStop = true; 2Xk(3J!!'a } F>&Q5Kl R Oa\!5Pw1 Ac<V!v71 } ]hTYh^'e X<ZIeZBn )K>XLaG) /* x- ) D@dw< **FileAccess.java \^SL Zhe *//文件访问(定位,写) a^i`DrX package NetFox; yyxGVfr import java.io.*; ZN5\lon|Y ftF?T.dx
OM{-^ public class FileAccessI implements Serializable{ By6C+)up NZYtA7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 KbVV[ * RandomAccessFile oSavedFile; 7qA);N long nPos; K97lP~Hu z.oDH<1 ?qYw9XQYL public FileAccessI() throws IOException 1t=Y+|vA9 { ^*'|(Cv this("",0); j#y_# } z^I"{eT8 Qpiv,n wcP0PfY public FileAccessI(String sName,long nPos) throws IOException ~ C6<75 { 9+h9]T:9 oSavedFile = new RandomAccessFile(sName,"rw"); 8e)k5[\m this.nPos = nPos; j2deb`GD oSavedFile.seek(nPos); 6'395x_.\ } K+Al8L?K_ "cRc~4%K u].=b$wHHM public synchronized int write(byte[] b,int nStart,int nLen) e V^@kI4 { O[y.3>l[s int n = -1; IPa08/ try{ LslQZ]3MY oSavedFile.write(b,nStart,nLen); o %A4wEye n = nLen; lYT}Nc4"=" } CjORL'3 catch(IOException e) :2Qm*Y&_$V { `23&vGk} e.printStackTrace (); )y'`C@ijI } r
vVU5zA4H p=\DZU~1 8,=Ti7_ return n; a)PBC{I } 8^&)A b `da6}Vqj: j[m\;3Sp } -'3vQXj& +|r;t s
,\w00-: /* rw8O<No4.o **SiteInfoBean.java zA9N<0[]o */ 4O9HoX#-? package NetFox; vLDMa> 511^f`P< a+)Yk8%KY public class SiteInfoBean { Usk@{ RPPxiYU^ EK_NN<So# private String sSiteURL; //Site's URL ii2X7Q private String sFilePath; //Saved File's Path =r3Yt9 private String sFileName; //Saved File's Name \K`AO{ D@ private int nSplitter; //Count of Splited Downloading File huWUd)Po% r.xGvo{iY .hn{m9|U public SiteInfoBean() bPC {4l {//nSplitter的缺省值为5 fC.-* r //default value of nSplitter is 5 -
4' yp this("","","",5); dwv xV$Nt } ml.l( 6A D(Zux8l :RzcK>Gub= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7.CzS {
'`T.K< sSiteURL= sURL; [esjR`u sFilePath = sPath; K_ Y0;!W sFileName = sName; kWjCSC>jA this.nSplitter = nSpiltter; Ko\m8\3?fK [X#bDO<t $n(?oyf } ^>h
9< !9356) cV T mH# public String getSSiteURL() 9Vxsv*OR, { QKCc5 return sSiteURL; o
]2=5;) } 3*CF !Y% #E5Sc\, $V]D7kDph* public void setSSiteURL(String value) h#^IT { Dgj`_yd sSiteURL = value; j8M}*1 } Os*,@N3t w?Nvm?_] 4FQU$f public String getSFilePath() NAZxM9 { _T6WA&;8 return sFilePath; 7Nh6 ` } LV0g *ng
&e7yX JiDX|Q<c public void setSFilePath(String value) 6f?5/hq { 2etcSU(y> sFilePath = value; 702&E(rx, } !R//"{k0? k^ B'W{ H_ .@{8I public String getSFileName() |ZJ]`qmZ { isj<lnQ return sFileName; i'L7t!f}o } 8niQG'] _Jj|g9b -F4CHpua public void setSFileName(String value) M86v { TA`*]*O( sFileName = value;
b?CmKiM% } /]>&OSV \kzxt/Ow ?T$i public int getNSplitter() ti`z:8n7 { \$VtwVQ,b return nSplitter; Z2PLm0%: } 59$mfW
o> #|A
@ TcpD*%wW public void setNSplitter(int nCount) 9gn_\!Mp { >J 3N,f nSplitter = nCount; Mn7 y@/1 } y`mE sj } "2'nLQ""q 2(5wFc 0"#tK4 /* n1y#gC **Utility.java zXbTpm */ A}~hc&J package NetFox; n4> _S,2j_R9 \r324Bw>2 public class Utility { 8$v17 3 3yr{B Xn I?4J69' public Utility() q_OIzZ@ { me1ac\ qoB #ZCgpg$wM } #MHnJ #bsR L8@ //线程睡眠 x2Y1B public static void sleep(int nSecond) V/"0'H\"1 { d+fmVM?p try{ A.
U< Thread.sleep(nSecond); aZ*b"3 } 1
YMaUyL
1 catch(Exception e) X[j4V<4O { u\^<V) e.printStackTrace (); : 60PO } ;)0vxcMB } c*~/[:} "! p#8jR^ //日志 jn]hqTy8 public static void log(String sMsg) ?7^(' { s3g$F23 System.err.println(sMsg); |A'8 'z&q } XLqS{r~? H$(%FWzQ% w,eYrxR|N public static void log(int sMsg) H!Uy4L~> { b[GZ sXD- System.err.println(sMsg); *r:8=^C7S } bxkp9o } S.t+HwVodO Tud[VS?99 ~;UK/OZ /* _m3PAD4 **TestMethod.java %?X~, */ iP|h] ;a+@ package NetFox; $o/?R]h W>wE8? _, YXrTm[P public class TestMethod { m[ay Z(/jQ=ozQ P~ffgzP public TestMethod() ll[U-v{ { ///xx/weblogic60b2_win.exe jl3RE|M\< try{ .[= 0(NO SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); U>:CX
XHRt //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N=tyaS(YJ SiteFileFetch fileFetch = new SiteFileFetch(bean); $Jb+}mlT fileFetch.start(); L)8;96 } lG%oqxJ+ L catch(Exception e){e.printStackTrace ();} ln9MVF'!& d?b2jZ$r] g B+cU } cU%#oEMf< T=;'"S e3)rF5pp public static void main(String[] args) ;P5\EJo { dlJkxEh2 new TestMethod(); Sh2q#7hf } | =N8X } il5WLi;{ 点击下载更多相关资料
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