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/* TpA\9N#$ **SiteFileFetch.java mAk{"65V */ .qk]$LJF7 package NetFox; eMRar<)+#* import java.io.*; `.y}dh/+0W import java.net.*; d--y %+ZJhHT $,xnU.n public class SiteFileFetch extends Thread { bqanFQj O4<g%.HC6 r%DFve:% SiteInfoBean siteInfoBean = null; //文件信息Bean 50dGBF long[] nStartPos; //开始位置 P;PQeXKw long[] nEndPos; //结束位置 iR$<$P5 FileSplitterFetch[] fileSplitterFetch; //子线程对象 K^r)CCO long nFileLength; //文件长度 7u\*_mrv boolean bFirst = true; //是否第一次取文件 x\2?ym@ boolean bStop = false; //停止标志 Y^%T}yTtq File tmpFile; //文件下载的临时信息 bVmAtm[ DataOutputStream output; //输出到文件的输出流 ~.%K/=wK @ `V[!@b: //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _=
#zc4U public SiteFileFetch(SiteInfoBean bean) throws IOException ;Ut+yuy { gn5)SP 8 siteInfoBean = bean; K;7f?52 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o;b0m;~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); H'
T if(tmpFile.exists ()) ?muzU.h"z { k%[3Q>5iM bFirst = false; (wc03,K^ read_nPos(); N8KQz_]9I } @`FCiH M else fAZiC+ { sBv>E}*R nStartPos = new long[bean.getNSplitter()]; A?G IBjs nEndPos = new long[bean.getNSplitter()]; 4`#F^2r! } vi@Lz3}:: )m3q2W B7\k< Nit0 OdMO=Hy6d } ?Z\Yu' (><zsLs& PiFD^w public void run() UR(-q { W~_t~Vg5 //获得文件长度 1GEK:g2B //分割文件 R];Oxe //实例FileSplitterFetch elG;jB //启动FileSplitterFetch线程 FZB~|3eq{ //等待子线程返回 $ _8g8r} try{ \yrisp#` if(bFirst) :hGPTf { _wb0'xoK" nFileLength = getFileSize(); H7i$xWs if(nFileLength == -1) k
{- { H1!iP$1#V System.err.println("File Length is not known!"); SM[Bv9|0 } HxK$ 4I` else if(nFileLength == -2) 8\<jyJ { \qsw"B*tv` System.err.println("File is not access!"); dBO@6*N4c } VC5_v62&. else KlK`;cr? { U=bEA1*@0 for(int i=0;i<nStartPos.length;i++) @|yeqy_: {
2?Ye*- nStartPos = (long)(i*(nFileLength/nStartPos.length)); ry};m_BY } TJ?g% for(int i=0;i<nEndPos.length-1;i++) =Nz0.: { !gwjN_ZJ^ nEndPos = nStartPos[i+1]; -#-p1^v} } 4!`bZ`_Bw nEndPos[nEndPos.length-1] = nFileLength; \EbbkN:D } Hy{
Q#fq } $]aBe
!
[fu!AIQs 3#wcKv%>&_ //启动子线程 A5#y?Aq fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v"+k~:t* for(int i=0;i<nStartPos.length;i++) OEdJc\n_R { ujW1+Oj=~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fpM#XFj siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (_*
wt]"' nStartPos,nEndPos,i); A`O <6
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +.[\g|G fileSplitterFetch.start(); _9:@Vl]Q@ } Vbh6HqAHxJ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `,wu}F85 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); PXP`ZLF // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ')+0nPV nEndPos = " + nFileLength); h%d^Gq~ // fileSplitterFetch[nPos.length-1].start(); &O[s: 7#;vG>] _RMQy~&b //等待子线程结束 ~
aZedQc //int count = 0; {TXOQ>gY //是否结束while循环 QzGV.Mt2 boolean breakWhile = false; JM0I(% Z% kfC0zd+ >KGE-Yzj while(!bStop) B1N)9% { >5~7u\#9 write_nPos(); ]TO/kl/ Utility.sleep(500); } :iBx breakWhile = true; NTs;FX~g[ wh 0<Uv l QPqcZd for(int i=0;i<nStartPos.length;i++) 4C~UcGMv\ { "
oy\_1| if(!fileSplitterFetch.bDownOver) %Xh fXd' { Ft%hh|$5y breakWhile = false; HN5W@5m:
. break; lp&!lb` } 5/ecaAB2 } ;mm!0]V if(breakWhile) s #:%x# break; kD~uGA \hk/1/siyF [2$4| ;7 //count++; g=]&A //if(count>4) L3y5 a?G // siteStop(); vTr34n } A,i()R'I t> Q{yw ?`sy%G System.err.println("文件下载结束!"); !MZw#=D` } -Q$nA>trKA catch(Exception e){e.printStackTrace ();} q/@dR{- } 6=|&tE
t\U$8l_; ka7uK][ //获得文件长度 y<r}"TAf- public long getFileSize() Uku5wPS { C77D{@SM int nFileLength = -1; ESQ!@G/n try{ g%J./F=@3 URL url = new URL(siteInfoBean.getSSiteURL()); V:
p)m&y6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gqiXmMm:9 httpConnection.setRequestProperty("User-Agent","NetFox"); B5=3r1Ly ryD%i"g< 8q_0,>w% int responseCode=httpConnection.getResponseCode(); 4-4?IwS if(responseCode>=400) G^h_YjR`* { QrjDF> processErrorCode(responseCode); Rmh*TQu return -2; //-2 represent access is error F+=urc>w } P9#)~Zm}] \tt'm\_ cFfTYP9 String sHeader; p]LnE`v 7s>a2 :uCdq`SaQl for(int i=1;;i++) ?A=b6Um { tbj=~xYf //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .Oo/y0E^ //Utility.log(in.readLine()); i*tv,f.( sHeader=httpConnection.getHeaderFieldKey(i); XDmbm*~i if(sHeader!=null) ~^o=a?L`< { _,;%mK if(sHeader.equals("Content-Length")) 'Tf9z+0; { xe:' 8J6L nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); N)OCSeh break; #qL9{P<} } [STje8+V } L=A\ J^% else X\2_;zwf break; @@pq'iRn } ~
l )t|'6 } *re 44 catch(IOException e){e.printStackTrace ();} Dt}dp_ catch(Exception e){e.printStackTrace ();} ??xlA-E 2;(W-]V? N=fz/CD)I Utility.log(nFileLength); -q2MrJ* W7e4pR?w Y}1P~ return nFileLength; X\A]"su } v&0d$@6/U |^5 /(16 az(5o //保存下载信息(文件指针位置) E2:D(7(;l private void write_nPos() qzdaN5 { vo;5f[>4i try{ 3"i% { output = new DataOutputStream(new FileOutputStream(tmpFile)); fEiJ~&{& output.writeInt(nStartPos.length); _Xh=&(/8@ for(int i=0;i<nStartPos.length;i++) sco
uO$K { [\HQPo'S // output.writeLong(nPos); )+GX<2_ output.writeLong(fileSplitterFetch.nStartPos); }MZan" cfo output.writeLong(fileSplitterFetch.nEndPos); Q]i[.ME } QT}iaeC1i output.close(); &-F"+v,+ } 0VG=?dq catch(IOException e){e.printStackTrace ();} )1z4q` catch(Exception e){e.printStackTrace ();} Q;gQfr"c7 } @
R'E?| Sr7@ buF m!!;/e?yx //读取保存的下载信息(文件指针位置) 02M7gBS private void read_nPos() &t[|%c*D& { &wGg6$ try{ rt;gC[3\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); iPFL"v<#J int nCount = input.readInt(); NKh,z&
_5- nStartPos = new long[nCount]; u[[/w&UV., nEndPos = new long[nCount]; &!#2ZJ}{ for(int i=0;i<nStartPos.length;i++) [f(uqLdeM { #_p nStartPos = input.readLong(); ![Hhxu nEndPos = input.readLong(); 7K !GK } lm &^tjx input.close(); Em9my2oE } ScHlfk
p catch(IOException e){e.printStackTrace ();} nOuN|q=C catch(Exception e){e.printStackTrace ();} 2mOfsn d@ } >C^/,/%v 0#
UAjT3 lxOqs:b private void processErrorCode(int nErrorCode) ?1DUNZ6 { %JaE4& System.err.println("Error Code : " + nErrorCode); 8>v7v&Bh| } !h/dZ`# wy\o*P9mG) z@n+7p`w //停止文件下载 EFNdiv$wF public void siteStop() wLSjXpP8 { 3DI^y`av bStop = true; G4);/# for(int i=0;i<nStartPos.length;i++) ;>/ipnx fileSplitterFetch.splitterStop(); /MqP[*L Si[eAAd'
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| //负责部分文件的抓取 YiBOi?h9 **FileSplitterFetch.java XWf7"]%SX */ @2|G|C/]O} package NetFox; *|CLO|B) (V^QQ !: [BE:+ ID3 import java.io.*;
3:"AFV import java.net.*; kFnUJM$r (Z'WR 3li q9P_ public class FileSplitterFetch extends Thread { a(g$ d2H k$?&]! <o !yk7HaP String sURL; //File URL 7j95"mI long nStartPos; //File Snippet Start Position :(RL8 long nEndPos; //File Snippet End Position <EOg,"F int nThreadID; //Thread's ID 5bF5~D(E boolean bDownOver = false; //Downing is over JN)"2}SE boolean bStop = false; //Stop identical TA<hj[-8 FileAccessI fileAccessI = null; //File Access interface y8}"DfU. w[M5M2CF Hq79/wKj public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException BMe72 { myffYK, this.sURL = sURL; T+3k$G[e/ this.nStartPos = nStart; a\Tr!Be, this.nEndPos = nEnd; bL#sn_(m nThreadID = id; =cknE= fileAccessI = new FileAccessI(sName,nStartPos);//定位 m_~y } !__D}k, @gY'YA8m 0yKwH\S public void run() fg< (bXC { +-'`Q Ae while(nStartPos < nEndPos && !bStop) |zg=+ { XZ!cW=bqS 7- (>"75Q| MQjG<O\ try{ EOofa6f&l URL url = new URL(sURL); +6wx58.B& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6@i|Kw(: httpConnection.setRequestProperty("User-Agent","NetFox"); SG1&a:c+. String sProperty = "bytes="+nStartPos+"-"; es{cn=\s httpConnection.setRequestProperty("RANGE",sProperty); z`;&bg\8 Utility.log(sProperty); S/KVN(Z `f2W;@V0 ;}n|,g> InputStream input = httpConnection.getInputStream(); '[ @F% //logResponseHead(httpConnection); ,K`E&hS <tGI]@Nwk #IbS byte[] b = new byte[1024]; (cu' int nRead; !7ph,/P$7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;sm"\.jF { !XkymIX~O. nStartPos += fileAccessI.write(b,0,nRead); k{zs578h2 //if(nThreadID == 1) b*@&c9I;q // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0@JilGk1u } EaJDz`T} ~r{\WZ. U#OWUZ Utility.log("Thread " + nThreadID + " is over!"); X!7cz t bDownOver = true; +"TI_tK,S //nPos = fileAccessI.write (b,0,nRead); M9g~lKs' } cH+h=E= catch(Exception e){e.printStackTrace ();} _K*\}un2 } &?}kL=
h } )w^GPlh NKupOJJq dcV,_ //打印回应的头信息 {d&X/tT public void logResponseHead(HttpURLConnection con) CM+F7#T?n { nNd`]F^U for(int i=1;;i++) j;$6F/g { ]J8KCjq@ String header=con.getHeaderFieldKey(i); G5y]^P if(header!=null) 82G lbd) //responseHeaders.put(header,httpConnection.getHeaderField(header)); u^j8
XOT Utility.log(header+" : "+con.getHeaderField(header)); ^D%}V- " else *#ob5TBq[ break; 9;>@"e21R } 6M
O|s1zk } 3ybK6!g`[ @&!=m]D* U)O?|
VN^o public void splitterStop() <XkkYI( { ,6S_&<{ bStop = true; o|zrD~&$ } JL}hOBqfI {mCKTyN+ +#de8/x } ~0'_K1(H zgEr ,nF vkDZv@ /* 3I(dC|d **FileAccess.java f}Ne8]U/Hc *//文件访问(定位,写) jsZiARTZRl package NetFox; /Bg6z m import java.io.*; l(3'Re se^NQ= {ar5c&< public class FileAccessI implements Serializable{ zN?$Sxttx !mpMa]G3 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~#HH;q_7m RandomAccessFile oSavedFile; GFASF,+ long nPos; X+?Il)Bv knNhN=hG+ T:w2 public FileAccessI() throws IOException \]L::"![? { ;PP_3` this("",0); X]3l| D } =hZ&66 P;HVL flu al3BWRq'f public FileAccessI(String sName,long nPos) throws IOException +SZ%& { }"g21-T^ oSavedFile = new RandomAccessFile(sName,"rw"); i?&4SG+2~K this.nPos = nPos; rzYobOKd# oSavedFile.seek(nPos); XudH } FOlA* U4U Qwp\)jVi -@gJqoo> public synchronized int write(byte[] b,int nStart,int nLen) 1`2);b{@ { Tb!B!m int n = -1; hB2s$QS try{ iECC@g@a oSavedFile.write(b,nStart,nLen); q>D4ma^ n = nLen; &F<J#cfe8 } " kE:T., catch(IOException e) BCa90 { 1{\,5U& e.printStackTrace (); BM=V,BZy } P0`>{!r6@ QXIbFv Xj})?{FP return n; X1
0"G~0 } )$lSG}WD &dwI8@& ~q'w),bE"Q } t9$AvE#a!= ]sm0E@ 1 ?C#F?N0 /* cW~6@&zp **SiteInfoBean.java ]$?zT`>(F */ m"?'hR2 package NetFox; \U<F\i A^= Hu,"e U:pLnNp` public class SiteInfoBean { fRv
S@ C,VqT6E< O_s9 private String sSiteURL; //Site's URL x]%4M\T`` private String sFilePath; //Saved File's Path ,,wyydG private String sFileName; //Saved File's Name N#-kk3!Z; private int nSplitter; //Count of Splited Downloading File $&n240( FgHB1x4; =A6u= public SiteInfoBean() '^.=gTk {//nSplitter的缺省值为5 V5hlG =V //default value of nSplitter is 5 >r4Y\"/j this("","","",5); 8Jib|#! } XCqfAcNQ =xlYQ}-(a gR_b~^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {%+3D,$) { 1Hk<_no5 sSiteURL= sURL; dZ]\1""#H sFilePath = sPath; ^$&"<
sFileName = sName; c@ZkX]g this.nSplitter = nSpiltter; 0=(-8vwd W O \lny! I%zo>s6 } yw3U"/yw tUAY]BJ*s (8m\#[T+R public String getSSiteURL() w'!}(Z5X? { [r~rIb%Zj return sSiteURL; \3y=0 } #`6OC)1J HS5Ug'\446 ;hfG${l; public void setSSiteURL(String value) |+4E
8;4_ { 31o7R &v sSiteURL = value; [}xIg8 } 9>$%F;JP44 g:HbmXOBpj \A ~I>x public String getSFilePath() |"tV["a { L[[H\ return sFilePath; A0N ;VYv } ~_ l:b BGh8 \2 WX[dM
}L public void setSFilePath(String value) 1WA""yb { EK- bvZ sFilePath = value; l`5}i|4KTW } o y%g{,V \Dsl7s= as!|8JE` public String getSFileName() Kjca>/id { in;+d~? return sFileName; `v/tf|v6 } ~E:/oV:4 > i7w}`vs 3bI|X!j public void setSFileName(String value) ~BYEeUo;%v { 3z/O`z sFileName = value; ?'$.
-z: } N(({2'Rr +[l{C+p I}Gl*@K&O public int getNSplitter() )*L?PT { cX=b q_ return nSplitter; @}rfY9o' } dU04/]modD [ Xo
J7 gu.))3D9 public void setNSplitter(int nCount) &MGgO\|6 { Z`1o#yZ nSplitter = nCount; D<L{Z[ } h|/*yTuN.y } VT~
^:-] qI%9MI;BV QX~72X=( /* Hd@T8 D*A **Utility.java cJE>;a */ []fj~hj package NetFox; W!9f'Yn r@V(w` D]>86& public class Utility { T6?d`i i1
6V_5BpXt Pc:'>,3!V3 public Utility() !\|@{UJk/ { FUv)<rK $YO]IK$ 6I.+c } '~6CGqU* ojs/yjvx //线程睡眠 [`nyq ) public static void sleep(int nSecond) PT*@#:MA { +z/73s0~ try{ <h>fip3o Thread.sleep(nSecond); E6IL,Iq9 } WAXrA$:3J catch(Exception e) { dxyBDK { _"e(
^yiK e.printStackTrace (); KB-#):' } HQ#L
|LN } ha'm`LiX
tp3N5I //日志 |`9zE] public static void log(String sMsg) a{YVz\?d} { I)4|?tb? System.err.println(sMsg); z&G3&?Z } v?' k)B #[rFep u6&Ixi/s' public static void log(int sMsg) j:<T<8.o { sU3V)7"
System.err.println(sMsg); Yy:sZJ } =|zyi| } 3mn-dKe(( $R}iL :r+
1>F$o /* ^\t">NJ^ **TestMethod.java |vE#unA */ ]V7hl#VO package NetFox; *>H'@gS 4>eg@s N pv.),Iv-68 public class TestMethod { |"&4"nwa Olrw>YbW ?fwr:aP~ public TestMethod() t-{OP?cE1 { ///xx/weblogic60b2_win.exe
jS)-COk try{ 9CSz<[ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); c^UM(bW //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Tfs9<k>G# SiteFileFetch fileFetch = new SiteFileFetch(bean); j[
YTg] fileFetch.start(); 9_^V1+
} 78A4n C catch(Exception e){e.printStackTrace ();} $w}aX0dK& ApB'O;5 m`6`a|Twp$ } 5w%9b e/l?|+m 6 fA,!d J public static void main(String[] args) _C\
d^a( { o[*ih\d new TestMethod(); eh=bClk } nr%^:u } ,$*klod 点击下载更多相关资料
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