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/* pAuwSn#i **SiteFileFetch.java >xKRU5 */ t@n (a package NetFox; U'G`Q0n import java.io.*; pH[lj8S import java.net.*; h)vTu%J: Se`N5hQ ($W 5fbu public class SiteFileFetch extends Thread { gEsR-A!m /f<(K-o] Qg!*=<b SiteInfoBean siteInfoBean = null; //文件信息Bean zY+Et.lg]^ long[] nStartPos; //开始位置 ]Dg0@Y long[] nEndPos; //结束位置 bn35f<+ FileSplitterFetch[] fileSplitterFetch; //子线程对象 O;BPd:< long nFileLength; //文件长度 a)Ek~{9 boolean bFirst = true; //是否第一次取文件 I>#ChV)(# boolean bStop = false; //停止标志 yFo5 pKF.J File tmpFile; //文件下载的临时信息 KOx#LGz DataOutputStream output; //输出到文件的输出流 rg}kxvu a6E" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Uzn|)OfWP public SiteFileFetch(SiteInfoBean bean) throws IOException QO/7p]$_ { F w m:c[G siteInfoBean = bean; Q8oo5vqQ#C //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |plo65 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &7&*As if(tmpFile.exists ()) 6DW|O<k^j { CF"3<*%x bFirst = false; F`.7_D read_nPos(); oZ[ w } QB,ad else ;hJ*u { A5ID I<a nStartPos = new long[bean.getNSplitter()]; vKC&Qi ; nEndPos = new long[bean.getNSplitter()]; HPKyAcS\ } vq7%SEkES v6\2mc. 3+5\xRq Ue:T3jp3% } ^)l@7XxD T+h{Aeg y03a\K5[KQ public void run() OZm[iH { @ -d4kg //获得文件长度 \#,#_ //分割文件 j]O[I^5 //实例FileSplitterFetch ix @rq# //启动FileSplitterFetch线程 RgA4@J# //等待子线程返回 L.[uMuUa try{ d<? :Q if(bFirst) Aq'E:/ { 5yi q# nFileLength = getFileSize(); .@-]A if(nFileLength == -1) !!%nl_I( { m(:qZW System.err.println("File Length is not known!"); > C&<dO#i } M~F2cXW else if(nFileLength == -2) $ _Bu,; { /
i2-h System.err.println("File is not access!"); u>6/_^iq } WCT W#<izm else `Kw8rG\]: { g
'a? for(int i=0;i<nStartPos.length;i++) D@W3;T^ { vcU\xk") nStartPos = (long)(i*(nFileLength/nStartPos.length)); -L?%
o_ } 8z8SwWS? for(int i=0;i<nEndPos.length-1;i++) 91d`LsP { v^_]W3K nEndPos = nStartPos[i+1]; PVc|y. } YPDsE&,J) nEndPos[nEndPos.length-1] = nFileLength; 'N ::MN } W<]Oo ] } .r%|RWs6W S&]<;N_B ~<[5uZIo //启动子线程 g4SYG)'R+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; dS_)ll.6z for(int i=0;i<nStartPos.length;i++) {59VS
Nl { LEnP"o9ZW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ixHZX<6zYT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GiO#1gA nStartPos,nEndPos,i); 9O T4jAm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UA4d|^ev fileSplitterFetch.start(); 4?M3#],'h } <O)X89dFM // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MXJ9,U{<C' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); P^m 6di // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 02#Iip3t nEndPos = " + nFileLength); D4 ]B> // fileSplitterFetch[nPos.length-1].start(); aC
Lg~g4 7oLf5V1~ 8 E+C:" //等待子线程结束 8Pr7aT:, //int count = 0; #L=
eK8^e //是否结束while循环 b<V./rWIB boolean breakWhile = false; nEcd+7( @&xaaqQ- Il`k]X M while(!bStop) "mK i$FV { p't:bR write_nPos(); 4FE@s0M, Utility.sleep(500); pW--^aHu breakWhile = true; 4|41^B5Y 1
u_24 bKMR7&e.Ep for(int i=0;i<nStartPos.length;i++) 4'hcHdL9 { {!e ANm' if(!fileSplitterFetch.bDownOver) X<}o>
6|d { agU!D[M_G breakWhile = false; :8-gm"awL5 break; XL/o y'_ } =>ztB w\ } <CKmMZ{ if(breakWhile) aGk%I break; U;Ll.BFP grxl{uIC8 ,\9m At1O //count++; e=jT]i *cU //if(count>4) ^N2M/B|0 // siteStop(); BS,5W]ervE } dGD^op,6g DEQE7.]3 q dJ%Rk#?;A System.err.println("文件下载结束!"); M$4=q((0 } XZdr`$z f catch(Exception e){e.printStackTrace ();} b801OF } |~bR.IA DMcxa.Sd! W
aGcoj //获得文件长度 X})Imk7&E public long getFileSize() q&Tn>B { H~dHVQtJZ int nFileLength = -1; =Wk/q_. try{ e_~fJ URL url = new URL(siteInfoBean.getSSiteURL()); zIm_7\e HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
c(V=.+J httpConnection.setRequestProperty("User-Agent","NetFox"); N>pmhskN? H1%[\X?= g?[&0r1 int responseCode=httpConnection.getResponseCode(); 71.\`' if(responseCode>=400) oAZF3h]po { H&=n:'k^ processErrorCode(responseCode); sL AuR return -2; //-2 represent access is error k8
;uC~L } ;64mf` (YYj3#| 8lWH=kA\ String sHeader; o!toO&= {`H<=h__ M9s43XL(& for(int i=1;;i++) m&`(pf4A { 4OOn, 09 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \SiHrr5 //Utility.log(in.readLine()); S2
"=B&,} sHeader=httpConnection.getHeaderFieldKey(i); m
UWkb if(sHeader!=null) =0PRAc { B?#k W!wj if(sHeader.equals("Content-Length")) bKuj
po6 { C3\E.u? nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); "7yNKO;W break; [l':G ] } y5/'!L)g } ^6aS]t else *K,hrpYR break; pFJQ7Jlx } ! FR%QGn1 } x9)aBB catch(IOException e){e.printStackTrace ();} O b8B catch(Exception e){e.printStackTrace ();} k]Alp;hVd %h" qMs S GjeUUmr Utility.log(nFileLength); Cx+WLD `D)Lzm R ,]Ro',A& return nFileLength; )>y
k- } v0Ai!# ^IVe[P' &@%
b?~ //保存下载信息(文件指针位置) (rr}Pv%yb private void write_nPos() Gg9VS&VI { j1puB try{ -Aa]aDAz68 output = new DataOutputStream(new FileOutputStream(tmpFile)); zUs~V`0 output.writeInt(nStartPos.length); `k(u:yGK for(int i=0;i<nStartPos.length;i++) OQ(D5GR:4 { o#xgrMB // output.writeLong(nPos); LZM,QQ output.writeLong(fileSplitterFetch.nStartPos); !8Z2X!$m{< output.writeLong(fileSplitterFetch.nEndPos); }3f
BY@
} hhpv\1h# output.close(); &:c:9w } F<Hqo>G catch(IOException e){e.printStackTrace ();} y !<'rg catch(Exception e){e.printStackTrace ();} .!(,$'(@= } aXdf>2c{JD #e.jY_ K4! P' //读取保存的下载信息(文件指针位置) J]}FC{CD! private void read_nPos() 2yln7[a { 6ORY`Pe7P| try{ *me,(C DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xMDrE? int nCount = input.readInt(); *O@sh nStartPos = new long[nCount]; }iilzE4oH# nEndPos = new long[nCount]; \Z)#lF|^ for(int i=0;i<nStartPos.length;i++) 'aD6>8/Hj { #>8T*B nStartPos = input.readLong(); N5nvL)a~ nEndPos = input.readLong(); >dpbCPJ9[ } Ag0]U input.close(); ~ww?Emrw } $ph0ag+ catch(IOException e){e.printStackTrace ();} [kbC'Eh* catch(Exception e){e.printStackTrace ();} YP[LQ> } NJZXs_%>$ n6b3E* [@m[V1D private void processErrorCode(int nErrorCode) F`!TV(,bY { %O#)Nq>mp System.err.println("Error Code : " + nErrorCode); HWqLcQ d:P } N-[n\}' "JkZJ# C"6Amnj //停止文件下载 L@w0N)P<!{ public void siteStop() )`w=qCn1 Y { q0&Wk"X%rr bStop = true; <rNtY , for(int i=0;i<nStartPos.length;i++) ht?CHUu fileSplitterFetch.splitterStop(); n0_B(997* : *ERRSL) Nd`HB=ShJ } R0%?:!
F } xE%O:a?S //负责部分文件的抓取 OI+E
(nA **FileSplitterFetch.java %drJ p6n% */ 3&es]1b package NetFox; {G]?{c)" lDo(@nM bA9CO\Pp` import java.io.*; $^t<9"t import java.net.*; ,Ij=b b SQRLxF O -G1})$ public class FileSplitterFetch extends Thread {
n
]w7Zj )S^z+3p J"-_{)0lD String sURL; //File URL R1}IeeZO?& long nStartPos; //File Snippet Start Position vF"c long nEndPos; //File Snippet End Position 5^yG2&># int nThreadID; //Thread's ID K<FKu $= boolean bDownOver = false; //Downing is over @7-=zt+f boolean bStop = false; //Stop identical uJgI<l'|e3 FileAccessI fileAccessI = null; //File Access interface LZ{YmD&6] `)6>nPr7P ?cJY
B) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException h1#S+k { 80Ag this.sURL = sURL; lr WLN this.nStartPos = nStart; 34SA~5 this.nEndPos = nEnd; E#8_hT]5 nThreadID = id; gI)u}JX fileAccessI = new FileAccessI(sName,nStartPos);//定位 R2l[Q){! } rJDnuR 2}w#3K )R~aA#<> public void run() ?w*yW;V` { gQy~kctQ# while(nStartPos < nEndPos && !bStop) <;%0T
xK|U { E/ijvuO rj 3YTu` 8W;2oQN7 try{ Zd[OWF URL url = new URL(sURL); 3YW=||;|Yg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p#bhz5&/ httpConnection.setRequestProperty("User-Agent","NetFox"); ryg4hHspl String sProperty = "bytes="+nStartPos+"-"; [ByQ;s5tY httpConnection.setRequestProperty("RANGE",sProperty); oU8>Llt=$ Utility.log(sProperty); l4KbTKm7 Hd*}k6 tjj^O%SV< InputStream input = httpConnection.getInputStream(); &1_U1 //logResponseHead(httpConnection); nd:E9: #zt*xS[{0 H-(q#?: byte[] b = new byte[1024]; )Vg2Jix,] int nRead; ~].ggcl`w while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "mOI!xf@a { x`2| }AP( nStartPos += fileAccessI.write(b,0,nRead); kh3<V'k] //if(nThreadID == 1) !2$ z *C2; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @u/H8\.l } dCe X}Z fywvJ$HD]L :I
\9YzSs@ Utility.log("Thread " + nThreadID + " is over!"); (bv,02 bDownOver = true; hL!QLiF: //nPos = fileAccessI.write (b,0,nRead); zmiZ]uq } h*3{6X#(/ catch(Exception e){e.printStackTrace ();} A2NF<ZsD } 'tm$q/& } g6%Z)5D]! b}@(m$W vX;HC'%n //打印回应的头信息 ,3HcCuT public void logResponseHead(HttpURLConnection con) ,
ECLqs% { a
}'->H for(int i=1;;i++) (e9fm|n!)| { +?[BU<X6u String header=con.getHeaderFieldKey(i); f8'MP9Lv if(header!=null) .et ^4V3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); KzphNHd Utility.log(header+" : "+con.getHeaderField(header)); 0/ !,Dn else !8R@@,_v break; }HRK?.Vj: } *5OCqU+g } Cqxv"NN +@<KC JYm7@gx public void splitterStop() ghAi{@s$) { Hx2En:^Gf bStop = true; I%"'*7U } c#lPc>0xb -.iNNM&a |cDszoT
/ } r&%.z*q M T6/2d P`jL]x /* Wto;bd **FileAccess.java C5@V/vA *//文件访问(定位,写) (K :]7 package NetFox; = 96P7#% import java.io.*; iev>9j >MG(qi r-IT(DzkD public class FileAccessI implements Serializable{ s-*._; 4woO;Gm //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 iiG f'@/ RandomAccessFile oSavedFile; 8K{[2O7i) long nPos; 1A<,TFg q; jiw#_ ~n?>[88" public FileAccessI() throws IOException BqH]-'1G { c</1 this("",0); qAY%nA>jO } / nZ;v4 uD9|.P} wRtZ`o public FileAccessI(String sName,long nPos) throws IOException / i_ @ { rwE%G>Vb oSavedFile = new RandomAccessFile(sName,"rw"); 7N=-Y>$X this.nPos = nPos; j1-,Sqi oSavedFile.seek(nPos); q,%:h`t\ } hs+kr?Pg` T
vtm`Yk\ {9LWUCpsf public synchronized int write(byte[] b,int nStart,int nLen) Bs;|D { PdeBDFWD int n = -1; )]43R try{ JC#>Td oSavedFile.write(b,nStart,nLen); .S?pG_n]f n = nLen; 89~ =eY } |=dC
)Azs catch(IOException e) D@oCP =m< { {ZsdLF# e.printStackTrace (); 0?0Jz } %rkk>m `ln1$ D y-S98Y return n; ]J7Qgp)i } x@>&IBiL n_nl{ 5nlMrK } \qh*E#j ^aZAw%K >~nF= /* 58tVx'1y **SiteInfoBean.java h8e757z */ w5=tlb package NetFox; PVOx`<ng 3)=c]@N0 ANi)q$:{ public class SiteInfoBean { [
ho(z30k xiblPF_n3 .dMVoG5 private String sSiteURL; //Site's URL t.Nb?/ private String sFilePath; //Saved File's Path .;7> y7$* private String sFileName; //Saved File's Name E:`v+S_h private int nSplitter; //Count of Splited Downloading File %@"!8Y(j ]D2udeg jE2}p-2Q0 public SiteInfoBean() 9=X)ung9 {//nSplitter的缺省值为5 LE6.nmvS //default value of nSplitter is 5 ^' M>r(t this("","","",5); q`NXJf=sc } {'En\e txgQ"MGA% aGZi9O7G} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 3r+.N { X0(tboj# sSiteURL= sURL; Y?J"wdWJNB sFilePath = sPath; /4\wn?f sFileName = sName; cTTW06^ this.nSplitter = nSpiltter; 3*UR3!Z9
* LUX*P7*B !k3e\v| } yifY%!@Xu ?p<.Fv8.
uw(NG.4 public String getSSiteURL() &fa5laJb { 7CXW#H return sSiteURL; C'yppl% } }Ew hj>w j^tW
Iz 39wa|:I public void setSSiteURL(String value) Vwk #qgnX { %UUH" sSiteURL = value; B.r4$:+jb2 } Ian[LbCWB QqNW}:# c9qR'2 public String getSFilePath() j]|U {
HB+|WW t> return sFilePath; EtbnE*S } b$%0.s x<Vm5j 2d%}- nw public void setSFilePath(String value) ZF7IL {
@fv}G>t sFilePath = value; ez]tAW } <f@"HG
l zZcnijWb 40E#JF# public String getSFileName() k>x&Ip8p { ;Gx)Noo/> return sFileName; O$/o'"@ / } 9O{b]=>wq l3Njq^T y[B>~m8$ public void setSFileName(String value) ~/^5) g_ { _Z5Mw+=19 sFileName = value; \`V;z~@iA } #mize {7 TlN.( KL$bqgc(p3 public int getNSplitter() ^7zu<lX { 1I@8A>2^OX return nSplitter; N7E$G{TT } _@S`5;4x |@NiW\O T91moRv public void setNSplitter(int nCount) niB`2J { z[`@}}Q nSplitter = nCount; Zo1,1O } ;XM{o:1Y[ } F}Vr:~ 2'=T[<nNB s3 7'&K /* Z{&cuo.@<] **Utility.java s0Z
uWVip */ X7k.zlH7T package NetFox; @(r/dZc hI9 >pUtwIP public class Utility { jZ NOt bfo[" PkI:*\R public Utility() Q.K,%(^;a { &0f5:M{P vfVj=DYj 8@so"d2e } y;/VB,4V (o3
Iy //线程睡眠 jKt7M>P public static void sleep(int nSecond) l;o1 d-n] { II6CHjW`; try{ MEB it Thread.sleep(nSecond); cnTaJ/o } I? ,>DHUX catch(Exception e) I`NjqyTW { $D G?M6 e.printStackTrace (); ~69&6C1Ch } e7wSOs } P.gb1$7< ]U"94S U:) //日志 bhniB@< public static void log(String sMsg) 13taFVdU { N7e"@Ic System.err.println(sMsg); 03C0L& } ]+X@
7 s[UHe{^T -GxaV #{ public static void log(int sMsg) B}^w_C2 { Hh+ 2mkg System.err.println(sMsg); eM8}X[ } <)1qt
9 } F$)[kP,wtO 82l~G;.n3 Bve.C
/* HTG%t/S **TestMethod.java ti
\wg */ }_ 9Cxji package NetFox; d3xmtG {i B_.%i+ZZ 'inFKy'H public class TestMethod { zCk^B/j sM EN/,5<S<,[ M3.do^ss public TestMethod() {.XEL { ///xx/weblogic60b2_win.exe YPxM<Gfa8 try{ .SWlp2!M5 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); _*f`iu:` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); (!:,+*YY SiteFileFetch fileFetch = new SiteFileFetch(bean); =i[\- fileFetch.start(); 7Op>i,HZk\ } ui? catch(Exception e){e.printStackTrace ();} &v@a5 L LGn:c; B6={&7U2 } 'dn]rV0(C !z>6Uf!{ 2'w?\{}D public static void main(String[] args) ~sh`r{0 { ?32&]iM
oW new TestMethod(); w(L4A0K[ } :=Nz}mUV } ')cMiX\v 点击下载更多相关资料
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