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/* X_lNnk **SiteFileFetch.java XL:7$ */ *XJSa package NetFox; i+;EuHf import java.io.*; :O7J9K| import java.net.*; 6XP>p$- tVO x $[Fk>d public class SiteFileFetch extends Thread { .NKN2 4:.M*Dz /SiQw7yp% SiteInfoBean siteInfoBean = null; //文件信息Bean ?V0IryF; long[] nStartPos; //开始位置 &~i1 @\] long[] nEndPos; //结束位置 9g7T~|P FileSplitterFetch[] fileSplitterFetch; //子线程对象 LE;c+(CAU long nFileLength; //文件长度 %X3T<3< boolean bFirst = true; //是否第一次取文件 2,+H;Ypi! boolean bStop = false; //停止标志 7P File tmpFile; //文件下载的临时信息 <t8}) DataOutputStream output; //输出到文件的输出流 2h=RNU| d^7<l_u~ ! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) fRiHs\+ public SiteFileFetch(SiteInfoBean bean) throws IOException 8L:0Wp { {?8rvAjY siteInfoBean = bean; ?^dyQhb //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9:1ZL_yf tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); S7bSR?~L[ if(tmpFile.exists ()) 8:f(PN { v[m>;Ubg& bFirst = false; 4h|vd.t read_nPos(); {0?76| } N67m=wRx else BEw(SQH { /O9z-!Jz nStartPos = new long[bean.getNSplitter()]; C-8@elZ1 nEndPos = new long[bean.getNSplitter()]; J? C"be= } d/MMPge3 ){v nmJJ% -{dwLl_ 7*sB"_U2 } Qi9SN00F. RW'QU`N[Y >1YJETysO public void run() JH 8^ZP:d' { r;-\z(h //获得文件长度 @ Fu|et //分割文件 #(%6urd //实例FileSplitterFetch QgP
UP[ //启动FileSplitterFetch线程 ='(:fHhhX //等待子线程返回 w0pH|$"/P try{ B{44|aq1 | if(bFirst) d4lEd>Ni { N)QW$iw9 nFileLength = getFileSize(); @sP?@<C if(nFileLength == -1) WkT4&|POJ { ;X8eZQ System.err.println("File Length is not known!"); GE|V^_|i } ~MOIrF else if(nFileLength == -2) 0ZO!_3m$r { T5ol2 System.err.println("File is not access!"); 7v{Dwg } D ,nF0p else ]`LMyt0 { d;K,2 for(int i=0;i<nStartPos.length;i++) gF&1e5`i { LBTf}T\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); F8q|$[nH } BPW2WSm@< for(int i=0;i<nEndPos.length-1;i++) HN\9d { 0y*8;7-|r) nEndPos = nStartPos[i+1]; Uo# Pe@ieQ } alyWp nEndPos[nEndPos.length-1] = nFileLength; WOh?/F[@u } i6aM}p< } [&51m^ MGK%F#PM qeypa! //启动子线程 H+` Zp fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ta%yQd7 for(int i=0;i<nStartPos.length;i++) "d%o% { *y0TtEd; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6YNd;,it>p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^DD]jx nStartPos,nEndPos,i); _->d41 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3v\}4)A[ fileSplitterFetch.start(); y2cYRHN[X} } PY[nnoF"| // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :>f}rq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); JD9)Qelw^$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /V0[Urc@ nEndPos = " + nFileLength); HQX.oW // fileSplitterFetch[nPos.length-1].start(); MR}=tO ,N93 H3( LtW}R4}3 //等待子线程结束 ~wvu7 //int count = 0; yw\Q>~$n[= //是否结束while循环 QWcQtM boolean breakWhile = false; f?W_/daP Ir#]p9:x Lcb5^e?'Q while(!bStop) Q`kV|
pjg { a`I
\19p] write_nPos(); wDR/Vr"f Utility.sleep(500); i]9C"Kw$L breakWhile = true; \(_(pcl MQ#k`b#() Np7+g`nG for(int i=0;i<nStartPos.length;i++) 7vTzY%v { FRa>cf4 if(!fileSplitterFetch.bDownOver) galzk $D { Uo?4o*} breakWhile = false; (@m/j2z break; Fs"i fn0 } Qp7h|< } `J]e.K if(breakWhile) Qo32oT[DM break; .do8\ (@->AJF1\ bgLa`8 //count++; JR8|!Of@B //if(count>4) S/"G=^~ // siteStop(); ^hXm=r4ozR } eR%\_;}7; =p^$>o
&(oA/jFQ System.err.println("文件下载结束!"); )(0if0D4 } )r^vrCNy> catch(Exception e){e.printStackTrace ();} tn#cVB3 } w?>f:2(=[ l`.z^+!8@ !(
>U3N //获得文件长度 ;plBo%EBV public long getFileSize() qg{gCG { "\i H/ int nFileLength = -1; K[kK8i+( try{ E*O($tS URL url = new URL(siteInfoBean.getSSiteURL()); NB1KsvD{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]!ox2m_U httpConnection.setRequestProperty("User-Agent","NetFox"); WG A1XQ{ D'<L6w` D6Au)1y=& int responseCode=httpConnection.getResponseCode(); ;89kL] if(responseCode>=400) iLch3[p% { vn+XY=Qnr processErrorCode(responseCode); o2X95NiH return -2; //-2 represent access is error eT+i& } }/dk2!?ig pJx7S sW j*@@H6G String sHeader; 9j|v
D ;Ax-f04gG VE-l6@` for(int i=1;;i++) w%.hALN5-C { & ?x R //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }%p:Xv@X! //Utility.log(in.readLine()); tBbOxM m0 sHeader=httpConnection.getHeaderFieldKey(i); 9Q=VRH: if(sHeader!=null) ep=r7Mft { &nP0T-T5y if(sHeader.equals("Content-Length")) ]R_R`X? { /1MmOB nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); RqgN<&g? break; :a6LfPEAX } TY)QE } gYD1A\ else 4d`YZNvZW/ break; c`soVqT$? } j@>D]j } H"FK(N\ catch(IOException e){e.printStackTrace ();} nd]SI;< catch(Exception e){e.printStackTrace ();} X>8,C^~$1 g3z/yj y6nP=g|')> Utility.log(nFileLength); 8@;]@c)m zMR)w77 q2*A'C return nFileLength; -NXxxK } !HvA5'|:} pR$(V4> |tGUx*NN //保存下载信息(文件指针位置) 6N#hN)/ private void write_nPos() U?#wWbE1 { P9/ (f$ = try{ ^ +SE_ -+] output = new DataOutputStream(new FileOutputStream(tmpFile)); 7q+D}+ Xf output.writeInt(nStartPos.length); fZ$b8 for(int i=0;i<nStartPos.length;i++) T&lgWOls { TI'v /=;) // output.writeLong(nPos); =vbG'_[7 output.writeLong(fileSplitterFetch.nStartPos); 053bM)qW output.writeLong(fileSplitterFetch.nEndPos); QWk3y"5n< } UDHWl_%L output.close(); cD0rU8x } {Sf[<I catch(IOException e){e.printStackTrace ();} ,WRm{v0f^ catch(Exception e){e.printStackTrace ();} U05;qKgkDF } vkIIuNdDlx &"^F;z/ Ca|egQv //读取保存的下载信息(文件指针位置) E+aePo U private void read_nPos() ?H=q!i { L}`/v]E"eU try{ Am<5J,<uy DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xU.1GI%UPu int nCount = input.readInt(); fzIs^(:fl nStartPos = new long[nCount]; ; ~pgF_ nEndPos = new long[nCount]; r[S(VPo[() for(int i=0;i<nStartPos.length;i++) J#I RbO) { +/ZIs|B4,z nStartPos = input.readLong(); <E2 IU~e nEndPos = input.readLong(); aUaeK(x:H } #7]Jz.S input.close(); ,U~A=bsa } h3o'T=`Sm catch(IOException e){e.printStackTrace ();} k,:W]KD catch(Exception e){e.printStackTrace ();} >Uw:cq }
)0VL$A jE*{^+n
7*l$i/! private void processErrorCode(int nErrorCode) z`zz8hK. { geme_ System.err.println("Error Code : " + nErrorCode); eFG/!b<17 } 3`bQ0-D; ;P91'B~t {7o3wxsS //停止文件下载 /65YHXg, public void siteStop() -G(me"Cu { .nPOjwEx&Y bStop = true; JOJ.79CT for(int i=0;i<nStartPos.length;i++) XQo\27Fo fileSplitterFetch.splitterStop(); Lc{AB!Br ANhqS iXDG-_K } 9{u= } F7DA~G! //负责部分文件的抓取 =I# pXL **FileSplitterFetch.java YnEyL2SuU */ 'H530Y\ package NetFox; |0n )U( 6
9>@0P ?()*"+N(ck import java.io.*; W'C>Fn}lO? import java.net.*; 7hHID>,o9% 0V:H/qu8> TxJk.c public class FileSplitterFetch extends Thread { OG5{oH#K t#^Cem< 1SExlU String sURL; //File URL
7kLurv long nStartPos; //File Snippet Start Position #_DpiiS,.Q long nEndPos; //File Snippet End Position Nx 42k|8
int nThreadID; //Thread's ID g88k@<Y boolean bDownOver = false; //Downing is over jZA1fV boolean bStop = false; //Stop identical tm~9XFQ< FileAccessI fileAccessI = null; //File Access interface 0>28o. ;/Hr ZhOE &qx/ZT public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException A(2 0+ { V'kBF2} this.sURL = sURL; dla_uXtM6 this.nStartPos = nStart; 1CC0]pyHX this.nEndPos = nEnd; cfTT7O#Dc nThreadID = id; y\??cjWb] fileAccessI = new FileAccessI(sName,nStartPos);//定位 |/Vq{gxp+ } eKiDc=@ 3~`P8 9 Y/sav; public void run() 'gY?=,dF> { "Hw%@]# while(nStartPos < nEndPos && !bStop) RdX+:!lD { tK3$,9+ > "hP Ti? "Hr<W try{ m6i ,xn URL url = new URL(sURL); Qsbyy>o) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hkPMu@BI httpConnection.setRequestProperty("User-Agent","NetFox"); hi(b\ABx String sProperty = "bytes="+nStartPos+"-"; 5iw\F!op: httpConnection.setRequestProperty("RANGE",sProperty); #(tdJ<HvC| Utility.log(sProperty); z4YDngf=4 N3u06 /4;mjE InputStream input = httpConnection.getInputStream(); y6$a:6 //logResponseHead(httpConnection); $n<1D -0!r -b!?9T?} RvR.t"8 byte[] b = new byte[1024]; #N][-i int nRead; #6M |T+= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 5Ew( 0K[ { 6 wN*d 5 nStartPos += fileAccessI.write(b,0,nRead); ^]o
H}lwO //if(nThreadID == 1) n/v.U,f&l@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cxR.:LD} } .rBU"Rbo 0Z2XVq~T$ ;-3&yQ7N) Utility.log("Thread " + nThreadID + " is over!"); X5o*8Bg4M bDownOver = true; q7CLxv
&QG //nPos = fileAccessI.write (b,0,nRead); pLu5x< } aVR!~hvFs catch(Exception e){e.printStackTrace ();} ;MQl.?vj } N:B<5l ' } k~)CJ6} >~,~X9 "M:ui0YP //打印回应的头信息 \`y:#N<c public void logResponseHead(HttpURLConnection con) N8nt2r<h { UlWmf{1%]? for(int i=1;;i++) >,,`7%Rv { Ar)EbGId String header=con.getHeaderFieldKey(i); |Ua);B ~F if(header!=null) nReIi;pi //responseHeaders.put(header,httpConnection.getHeaderField(header)); ! VT$U6 Utility.log(header+" : "+con.getHeaderField(header)); E]Mx<7;\. else "EpH02{i break; q]1p Q)\'p } O1\4WG% } qb;b.P?~D$ 3[Q7'\ E,d<F{=8,o public void splitterStop() 29=ob(" { s/ABT.ZO bStop = true; 53hX%{3 } &B5&:ib1D `a52{Wa R?1Z[N } o~'p&f ^Zvb3RJ g a =W%x{ /* '`;=d<' **FileAccess.java Z'A 3\f *//文件访问(定位,写) qMEd
R;o package NetFox; ;%0kzIvP import java.io.*; bj`GGxzOb iuj%.}
H*G(`Zl} public class FileAccessI implements Serializable{ sf$hsPC^ Y;R,ph.a //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 g}R#0gkdk} RandomAccessFile oSavedFile; E-^(VZ_Xj long nPos; 9Tr ceL; Ytc[ kp 48z%dBmTT* public FileAccessI() throws IOException <b'*GBw$ { ];CIo>
b_( this("",0); eV%{XR?y } auGK2i BEax[=&W xyo~p,(~t public FileAccessI(String sName,long nPos) throws IOException +@uA { j|8!gW oSavedFile = new RandomAccessFile(sName,"rw"); y=sae this.nPos = nPos; Lios1|5 oSavedFile.seek(nPos); ..Dm@m} } /&\V6=jA1 Pm#/j; )a0l:jEOc public synchronized int write(byte[] b,int nStart,int nLen) ;HAvor=? { #yIHr&'oX int n = -1; dLGHbeZ[( try{ W\-`}{B_/ oSavedFile.write(b,nStart,nLen); 2ZV; GS# n = nLen; 2!LDrvPP } 3{.]! catch(IOException e) f"gYXaVF+ { #qk=R7"Q e.printStackTrace (); /":/DwI' } _'mC*7+ j=U"t\{ FO>!T@0G return n; =}tomN(F~[ } (`slC~" =RXeN+
&R 6|'7Mr~\ } ;o)'dK s]e`q4ip 8pf]M& /* T}z? i **SiteInfoBean.java x] `F#5j */ >&fD:y'& package NetFox; Kg~D~
+j Qu Mv1)n G>:v1lde public class SiteInfoBean { ~$>JYJj qi~-<qW [(g2u@ private String sSiteURL; //Site's URL 2.</n}g private String sFilePath; //Saved File's Path zOA~<fhT private String sFileName; //Saved File's Name Uc_}=" private int nSplitter; //Count of Splited Downloading File g$2#TWW5 [;aM8N
/2d>nj public SiteInfoBean() 1P"{TMd? {//nSplitter的缺省值为5 QKEtV //default value of nSplitter is 5 T^MY w this("","","",5); wbOYtN Y@ } !wUznyYwt '/XP4B\(E W$wX[ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0\"#Xa+}8 { d 4tL sSiteURL= sURL; !0? B=yA sFilePath = sPath; byE0Z vDM sFileName = sName; l'Za"TL: this.nSplitter = nSpiltter; |15!D ts(u7CJd
wT19m } _1Rw~}O 4Dn&+=fq t
zd#9 # public String getSSiteURL() Z5oDj|&l} { _#v"sGmN return sSiteURL; l]D$QT3 } 'bLP#TAzf j&/+/s9N lijTL-3 public void setSSiteURL(String value) _:NQF7X#ug { r?Mf3U^G sSiteURL = value; PfU\.[l$ } #>KiX84 NwOV2E6@OW 6q'Q?Uw^ public String getSFilePath() ,6MJW#~] { Hmm0H6&u return sFilePath; 'MX|=K!C } !%}n9vr!}\ )M"NMUuU" e <{d{ public void setSFilePath(String value) Qp[
Jw?a { p),*4@2< sFilePath = value; E0 VAhN3G\ } u59l)8= {R63n ny+r>>3Td public String getSFileName() mzM95yQ^Z { ZZ{c return sFileName; T#!% Uzz } U5-8It2OR .]KC*2 f^hJA Z public void setSFileName(String value) z]hRc8g}d { B_[I/ ? sFileName = value; $ S3b<]B } _3%:m||,XP Y)lr+~84f ><IWF#kUA public int getNSplitter() IEm~^D#<= { (||qFu9a return nSplitter; 'ParMT } 8Uh|V& SD*q+Si,1U 1k:yU( public void setNSplitter(int nCount) KI#v<4C$P { C4PT(cezR nSplitter = nCount; #6#n4`%ER } R!/JZ@au< } 4P)#\$d:
? .SiT5 ]D5Maid+ /* bWb/>hI8
Q **Utility.java t {1 [Ip */ w+j\Py_G" package NetFox; 2.Ww(`swL Z@x& GK,{$SC+= public class Utility { PX^k; uUHWTyoO
3SbZD public Utility() 2+)h!y] { H!}L( gjEG z}-R^"40 D}}?{pe } >*O5Ry:4 ?&,6Y'" //线程睡眠 SfPQ;s' public static void sleep(int nSecond) , vvfk=- { 8Vn try{ 1V[ZklS Thread.sleep(nSecond); saZK+kD4I } q[P> s{" catch(Exception e) QaEiP n~ { A0A|c JP e.printStackTrace (); W[`ybGR< } (>u1O V } IMdp" KLG .?`h: //日志 c8 public static void log(String sMsg) .WN&]yr, { TBJ?8W( System.err.println(sMsg); @VOegf+N } ^J^~5q8 WwnBe"7M *]<= 04v]R public static void log(int sMsg) YZOwr72VL { hTZ6@i/pS System.err.println(sMsg); )$f?v22 } *UW 8|\; } BH^*K/^ -*w2<DCn {U3jJ#K /* yVn%Bz'
[ **TestMethod.java b0h\l#6 */ [X@{xF^vBQ package NetFox; af6<w.i +RpCh!KP zCA8}](C^ public class TestMethod { txnH~;( t'W6Fmwkx B[8RBTsA public TestMethod() 7yg{0a { ///xx/weblogic60b2_win.exe
&``nD try{ ]P7gEBi SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5lzbg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >#mKM%T2MJ SiteFileFetch fileFetch = new SiteFileFetch(bean); RYC%;h fileFetch.start(); Ym]g0a } h V`?,
~K catch(Exception e){e.printStackTrace ();} hF^JSCDz l >zJk G9a RDQ]_wsyKG } zn= pm#L t W s2N'Ip public static void main(String[] args) q2*)e/}H { ]!P6Z? new TestMethod(); tZ@&di:-F } hTby:$aCg } J'=s25OWU 点击下载更多相关资料
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