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/* 8AuBs;i **SiteFileFetch.java fkBL`[v)4 */ Nr4:Gih package NetFox; 4^tSg#!V{ import java.io.*; lmvp,BzC import java.net.*; h'):/}JPl 2Wz8E2. '4[=*!hs! public class SiteFileFetch extends Thread { * x/!i^ 4Z( #;9f ^dHQ<L3.* SiteInfoBean siteInfoBean = null; //文件信息Bean N1c=cZDV long[] nStartPos; //开始位置 z1PwupXt1 long[] nEndPos; //结束位置 <Kd(fFe FileSplitterFetch[] fileSplitterFetch; //子线程对象 Q +^& long nFileLength; //文件长度 -n|bi cP boolean bFirst = true; //是否第一次取文件 3'0Pl8 boolean bStop = false; //停止标志 _rT\?//B File tmpFile; //文件下载的临时信息 CubQ6@, DataOutputStream output; //输出到文件的输出流 ]:<!( h[ DNhR //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) dAh.I3 public SiteFileFetch(SiteInfoBean bean) throws IOException cz>,sz~i { z-5`6aE9< siteInfoBean = bean; tnRf!A;m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H5=kDkb tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5i!Q55Yv=, if(tmpFile.exists ()) 3!"N;Q" { 9\?OV@ bFirst = false; >='/%Ad read_nPos(); $YL9 vJV } g* q#VmE else E.oJ[; { GXtMX ha, nStartPos = new long[bean.getNSplitter()]; jFj11w1FrA nEndPos = new long[bean.getNSplitter()]; K4c:k;
V } Jz}nV1G(jz 94u{k1d x .+9hm| *@2Bh4 } H_DCdUgC' K p3}A$uV za>UE,?h public void run() t]yxLl\ { tE7jTe //获得文件长度 m&UP@hUV- //分割文件 z M9#1^X //实例FileSplitterFetch H U|.5tP //启动FileSplitterFetch线程 v= 55{ //等待子线程返回 HN5m %R&` try{ -8TJ:#|N if(bFirst) .DCHc,DxA { Z'z)Oo nFileLength = getFileSize(); BG>Y[u\N if(nFileLength == -1) "yn~axk7 { ;H_/o+ System.err.println("File Length is not known!"); Dyov}y } )dXa:h0RZ else if(nFileLength == -2) _bFUr { M";qo6 System.err.println("File is not access!"); 3nq?Y8yac } +)Z]<O else fE#(M +(< { ')X(P> for(int i=0;i<nStartPos.length;i++) CVj^{||eF { $~/2!T_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); RJrz ~,} } TR"C<&y$j for(int i=0;i<nEndPos.length-1;i++) 3[YG
BM( { v, $r.g; nEndPos = nStartPos[i+1]; t un}rdb } Ot=jwvw nEndPos[nEndPos.length-1] = nFileLength; lSj
gN~:z } 7aG.?Ca% } "s2_X+4oY OxlA)$.hpu ;FPx //启动子线程 Pf*6/7S: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2;}leZ@U for(int i=0;i<nStartPos.length;i++) ^|Ap_!t$; { p@<Q? fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &OMlW_FHR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), V>@[\N[ nStartPos,nEndPos,i); o-,."|6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YB#fAU fileSplitterFetch.start(); =$>=EBH,cm } `+7F H // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 615Ya<3f8 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ,6)N. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ks405 nEndPos = " + nFileLength); xEb>6+-F@ // fileSplitterFetch[nPos.length-1].start(); #8$?#
dT Y"Cf84E ZlT }cA/n //等待子线程结束 pu-HEv}]a| //int count = 0; eV;r /4 //是否结束while循环 _:x]'w% boolean breakWhile = false; 9^gYy&+>6] E
C?}iP Ss3p6%V/ while(!bStop) ^QK`z@B { twT/uBQ4a write_nPos(); }0'=}BE Utility.sleep(500); 3]Z1kB breakWhile = true; u?osX;'w L\:|95Yq H4$qM_N for(int i=0;i<nStartPos.length;i++) 'o AmA= { TOwd+]B if(!fileSplitterFetch.bDownOver) UhxM85M;x { MK&,2>m,A breakWhile = false; TCr4-"`r-{ break; ^Hd[+vAvR } ( }-*irSsj } HiCh:IP7>/ if(breakWhile) _&<n'fK[ break; 5mH[|_ GO"`{|o 7v: XAU //count++; Y.^L^ "%dF //if(count>4) p|>*M\LE# // siteStop(); +8Xjk\Hi } /K=OsMl2b8 u4x-GObJM S{c/3k~ System.err.println("文件下载结束!"); *a9cBl'_ } 'Wlbh:=$ catch(Exception e){e.printStackTrace ();} bJd|mm/v } =i/Df? {)YbksrJ{ v"*r %nCi //获得文件长度 J_Lmy7~xbD public long getFileSize() O-?rFNavxp { IH|zNg{\Y int nFileLength = -1; qmS9*me
{ try{ mF4W4~" URL url = new URL(siteInfoBean.getSSiteURL()); 5ggyk0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qu=~\t1[6 httpConnection.setRequestProperty("User-Agent","NetFox"); Jo? LPR
\6 ^q7V%{54 2Q^q$@L int responseCode=httpConnection.getResponseCode(); ~_ THvx1 if(responseCode>=400) M2$/x`\-~ { u$ts>Q;5
processErrorCode(responseCode); )aS:h}zn return -2; //-2 represent access is error Q*DT" W/0 } m\:^9A4HCg MZgaQU g YteIp'T String sHeader; bnxp[Qk|5 1p&.\ ^ 9~SPoR/_0 for(int i=1;;i++) _O`prX.:B0 { eG=d)`.JaV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); P,v7twc0M //Utility.log(in.readLine()); 5Xq+lLW> sHeader=httpConnection.getHeaderFieldKey(i); 2/-m-5A if(sHeader!=null) ($di]lbsT { corm'AJ/ if(sHeader.equals("Content-Length")) |J$A%27 { A95f!a nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
Xdvd\H= break; ;jPsS^X } E-A9lJWr } Gp9 <LB\, else HQ-[k$d
W4 break; wL;OQhI } lrrTeE* } *G"hjc$L catch(IOException e){e.printStackTrace ();} d i\.*7l? catch(Exception e){e.printStackTrace ();} }7PJr/IuF 5'!fi]Z 1+%UZK= K Utility.log(nFileLength); D*l(p5[ y?sz&*: ak 7% return nFileLength; \XDiw~0 } \f,<\mJ#
?1Nz
,Lc$ kQ\GVI11? //保存下载信息(文件指针位置) <spG]Xa< private void write_nPos() x[A|@\Z { 757&bH|a try{ +17!v_4^ output = new DataOutputStream(new FileOutputStream(tmpFile)); .Xlo-gHk output.writeInt(nStartPos.length);
yg\QtWWM for(int i=0;i<nStartPos.length;i++) D+T/ Z) { G|cjI* // output.writeLong(nPos); ,Yag! i>; output.writeLong(fileSplitterFetch.nStartPos); RDps{),E;d output.writeLong(fileSplitterFetch.nEndPos); k>i88^kPV } S|tD8A output.close(); 3M#x)cW } "&_+!TBg, catch(IOException e){e.printStackTrace ();} HT7,B(.} catch(Exception e){e.printStackTrace ();} 1wgL^Qz@ } v.ZUYa| GRc)3
2, L15)+^4n //读取保存的下载信息(文件指针位置) \`.v8C>vG private void read_nPos() &r,vD, { EU(e5vO try{ C(>!?-. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [8u9q.IZ int nCount = input.readInt(); f2.=1)u. nStartPos = new long[nCount]; 2Z; !N37U nEndPos = new long[nCount]; "P7OD^(x/ for(int i=0;i<nStartPos.length;i++) 9Og { N8]DzE0% nStartPos = input.readLong(); [I;C6p nEndPos = input.readLong(); U|wST&rU| } D#nH g input.close(); <Zva } g0 f4>m catch(IOException e){e.printStackTrace ();} VEV?$R7; catch(Exception e){e.printStackTrace ();} 6AIqoX*p } y[J9"k(@ 5K
Ij}VN
(N/u@ M private void processErrorCode(int nErrorCode) BOpZ8p'eH1 { :ok.[q System.err.println("Error Code : " + nErrorCode); Y`gO:d8 } Q8m~L1//S Mg >%EH/' P`rfDQoZ //停止文件下载 *,u{,$}2 public void siteStop() >p&"X 2
@ { &5}YTKe}| bStop = true; JCH9~n. for(int i=0;i<nStartPos.length;i++) UV(`. fileSplitterFetch.splitterStop(); x@X2r Boj R" dr)*.<_+a( } %=z>kU1| } qt:B]#j@ //负责部分文件的抓取 xst-zfkH` **FileSplitterFetch.java 5$i(f8* */ u.E>d9 package NetFox; r?KRK?I F=5+JjrX )]n>.ZmLCB import java.io.*; g Cp`J(2v: import java.net.*; o^@#pU < KXZG42w [__P-h{J public class FileSplitterFetch extends Thread { Fs>MFj [XPAI[" r@JMf)a] String sURL; //File URL Zzlt^#KLx long nStartPos; //File Snippet Start Position =lv( long nEndPos; //File Snippet End Position ll}_EUF| int nThreadID; //Thread's ID :E{)yT boolean bDownOver = false; //Downing is over <\nM5-wR boolean bStop = false; //Stop identical $c*fbBM(&n FileAccessI fileAccessI = null; //File Access interface O:v#M] .joC ZKO ]prw=rD public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E2l"e?AN~ { h~QQ- this.sURL = sURL; y%|E z this.nStartPos = nStart; aP (~l_ this.nEndPos = nEnd; aGWO3Nk nThreadID = id; >0 7i"a fileAccessI = new FileAccessI(sName,nStartPos);//定位 !UT!PX) } 75>%!mhM Y"ta`+VJ
/1TK+E$ public void run() Dj= {% { )4o8SF7lz while(nStartPos < nEndPos && !bStop) |`yU \ { DK2Wjr; b73}|4v S%H"i
y try{ RJ'za1@z;b URL url = new URL(sURL); "r`2V-E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c}v8j2{ httpConnection.setRequestProperty("User-Agent","NetFox"); NI/'SMj% String sProperty = "bytes="+nStartPos+"-"; @Y,t] httpConnection.setRequestProperty("RANGE",sProperty); =Crl{Ax Utility.log(sProperty); %#fjtbeB ka=A:biz A|Ft:_Y InputStream input = httpConnection.getInputStream(); ZYY`f/qi //logResponseHead(httpConnection); 37n2 #E AW;xlY= g Q@p'nE, byte[] b = new byte[1024]; p v4#`.m int nRead; BZOl&G( while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) dJzaP { E*R-Dno_F nStartPos += fileAccessI.write(b,0,nRead); GRpwEfG //if(nThreadID == 1) t<+>E_Xw // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m
Urb } "cS7E5-| 0^L:`[W+ ~Y0K Wx4 Utility.log("Thread " + nThreadID + " is over!"); ;"f9"
bDownOver = true; -~sW@u)O //nPos = fileAccessI.write (b,0,nRead); f*V^HfiQb } p%Q{Rqc) catch(Exception e){e.printStackTrace ();} io"NqR#"v } zp4@T) } J*ofa> lX.1B&T9Lr |-v/ //打印回应的头信息 (g dzgLHy public void logResponseHead(HttpURLConnection con) UQI!/6F { d:Z|It for(int i=1;;i++) )-XD=
] { 8xj_)=(sV! String header=con.getHeaderFieldKey(i); )4ok@^. if(header!=null) &]f8Xd //responseHeaders.put(header,httpConnection.getHeaderField(header)); F:Vl\YZ Utility.log(header+" : "+con.getHeaderField(header)); , iEGf-!k else 8~!h8bkC break; f&F9ImZ } >y}> 5kv } 7u1o>a%9 hQ)?LPUB Yjy%MR public void splitterStop() 8eCh5*_$ { amQiH!}8R bStop = true; }If,O } $/u.F; >7?Lq<H "<L9-vb } gjJ:s,Fg W;X:U. EnMc9FN(y /* 1JS5 LS **FileAccess.java 6DEH|2 *//文件访问(定位,写) 5a5JOl$8 package NetFox; 4X:mb}( import java.io.*; YYe<StyH AgDXpaq C:!&g~{cKi public class FileAccessI implements Serializable{ FIJ]` (h&=Na~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )
[)1 RandomAccessFile oSavedFile; fTy{`}> long nPos; 3ug>,1:6- 2_6@&2 W$}2
$}r0U public FileAccessI() throws IOException us#ji i.< { `y"a>gHC this("",0); 3! KyO)8 } *TL3-S? So NgDFD wG 5H^>6u> public FileAccessI(String sName,long nPos) throws IOException [MAvU?; { vA?3kfL|# oSavedFile = new RandomAccessFile(sName,"rw"); }y|_v^ this.nPos = nPos; O/l/$pe oSavedFile.seek(nPos); #E/|WT } +D h?MQt? ?;rRR48T9E 9:!V":8q public synchronized int write(byte[] b,int nStart,int nLen) >(gbUW { B.?@VF int n = -1; t4zKI~cO
try{ PTF|"^k+
oSavedFile.write(b,nStart,nLen); [L2N[vy; n = nLen; f 0/q{* } _k)EqPYu@ catch(IOException e) }o=s"0 a { `:gXQmt e.printStackTrace (); UE/iq\a> } oJc v D ?,r}@89pY J32"Ytdo< return n; ~. 5[ } n}J!?zZc 1mv8[^pF Xq$9H@. } \NL*$SnxP q] '2'"k !imjfkG /* ?KFj=Yo **SiteInfoBean.java |v"&Y */ ATD4%|a9h package NetFox; opReAU'I g|{Ru .V{y9e+ public class SiteInfoBean { NE?tfj fc^d3wH0L hIo^/_K private String sSiteURL; //Site's URL J)^Kls\>t private String sFilePath; //Saved File's Path g0s*4E private String sFileName; //Saved File's Name NV18~5#</ private int nSplitter; //Count of Splited Downloading File xf3/J{n3 kI^Pu \lpvRZ\L&g public SiteInfoBean() 9!Bz)dJ3 {//nSplitter的缺省值为5 LII4sf] //default value of nSplitter is 5 JF9r[% this("","","",5); Tu=~iQ } fp$U%uj 2()/l9.O' Y-v6M3$ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^B'N\[ { dJ7 !je1N* sSiteURL= sURL; ^Zq3K sFilePath = sPath; LHusy;<E[ sFileName = sName; U1pwk[ this.nSplitter = nSpiltter; Wl{}>F`W[ sWMY
Lo _3m\r*(vmQ } 'q{d? K oazy%n(KZ cx+%lco! public String getSSiteURL() TxmKmZ u { RxGZ#!j/ return sSiteURL; s,8g^aF4 } SuJ4)f;'0 8^qLGUxz Dp;6CGYl? public void setSSiteURL(String value) oN.#q$\` k { RA:3ZV sSiteURL = value; e8hwXz } I*=
=I4qx hODq&9! F t;[>o public String getSFilePath() BA`K ,#Ft7 { 6z1>(Za7> return sFilePath; <w0$0ku } =\x(Rs3 IUwMIHq&sW aeTVcq
public void setSFilePath(String value) HhT6gJWrU { a>)|SfsE sFilePath = value; /~_,p,:aP } j<-YK4.t ?`=r@ F'JceU public String getSFileName() a*{ -r] { 1y6{3AZm< return sFileName; 5H/D~hr& } 3/RNStd<L! ),U>AiF] $w
,^q+ public void setSFileName(String value) kSU]~x { '>dx~v % sFileName = value; fqD1Ej } JX2@i8[~ u|M_O5^ ivP#qM1*; public int getNSplitter() j#
!U6T { oTxE]a, return nSplitter; e'5sT#T9 l } \t%rIr 5VK.Zs\ 6 9EdMuf public void setNSplitter(int nCount) )\fLS d { P~ODd( nSplitter = nCount; c>yqq' } //-;uEO } U<.,"`=l $g]'$PB (b;*8 /* 'mE!,KeS; **Utility.java t(5PKD#~Dc */ Zf8_ko;|:- package NetFox; nY 50dFA, "/$2oYNy+ l5CFm8% public class Utility { x10u?@ "DU1k6XC okQ<_1e{ public Utility() J=AF`[ { ?bH!|aW(H ^mCKRWOP' |lVoL.Z,0 } _*LgpZ-2( W60C$*h //线程睡眠 +|TFxaVz public static void sleep(int nSecond) ;n;bap { Eh/Z4pzT try{ eaCh;IpIf Thread.sleep(nSecond); !5=S2<UX } }J|Pd3Q Sf catch(Exception e) pn-`QB:{h { 8;1,saA_9 e.printStackTrace (); !t!\b9= } b[`fQv$G } /zZ";4 O}mz@-Z //日志 7':qx}c#!1 public static void log(String sMsg) db5@+_ { )|`|Usn#[ System.err.println(sMsg); zJX _EO } db0]D\ ])H[>.?K XPsRa[08WK public static void log(int sMsg) .|z8WF* { j55;E
E! System.err.println(sMsg); qCku
q } 0`%Ask } 'fr~1pmx#3 H&E3RU>` /O&{fo /* ,RIC _26 **TestMethod.java B"=w9w] */ XCUU(H package NetFox; ^QTtCt^: TIYo&?Z) jltW@co2sV public class TestMethod { .p$tb2%r { bD:OF v2;'F public TestMethod() dxK3462 { ///xx/weblogic60b2_win.exe P1I L] try{ :DoE_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); w-wap //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); /7jb&f SiteFileFetch fileFetch = new SiteFileFetch(bean); m%)Cw)t
7 fileFetch.start(); wC`+^>WFo } m)Sdogt_ catch(Exception e){e.printStackTrace ();} nX|]JW 9A!B|s F0]xc } LMTz/M uwo\FI EaUO>S public static void main(String[] args) #d;/Me { 4"~l^yK new TestMethod(); Z|6,*XEc } $BUm, } s{dgUX 点击下载更多相关资料
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