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/* !%5ae82~3 **SiteFileFetch.java D
M(WYL{ */ 5 WSu package NetFox; no- Lx-x import java.io.*; YLmzMD> import java.net.*; TU&6\]yF_ _I8L#4\(= GE]fBg public class SiteFileFetch extends Thread { 9w'3d@ j!q5 Bc? m(>_C~rGN SiteInfoBean siteInfoBean = null; //文件信息Bean lc>)7UF long[] nStartPos; //开始位置 v+U(
#" long[] nEndPos; //结束位置 Uhfm@1 cz& FileSplitterFetch[] fileSplitterFetch; //子线程对象 i/9QOw~ long nFileLength; //文件长度 LI_>fuv"8 boolean bFirst = true; //是否第一次取文件 sUN>uroi ! boolean bStop = false; //停止标志 bq[j4xH0X File tmpFile; //文件下载的临时信息 +N5#EpW DataOutputStream output; //输出到文件的输出流 K&0op 4& |!{Q4< //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) OLUQjvnU public SiteFileFetch(SiteInfoBean bean) throws IOException G3n* bv { fN~kdm. siteInfoBean = bean; s:lar4>kM //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \bYuAE1q tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,X(P/x{B if(tmpFile.exists ()) $T{,3;kt { O=LS~&=, bFirst = false; >Z?fX read_nPos(); Cbm } qH!}oPeU' else Nv "R'Pps { ,Q4U<`ds! nStartPos = new long[bean.getNSplitter()]; fx %Y(W#5 nEndPos = new long[bean.getNSplitter()]; X).UvPZ/ } PxzeN6f #P *%FgROl S>}jsP:V ?g%5 d } .+>w0FG. F{)YdqQ 6TJ5G8z_ public void run() _6" vPN { _Z+tb] //获得文件长度 } Uki)3( //分割文件 xEQ2iCeC //实例FileSplitterFetch }HtP8F8!x //启动FileSplitterFetch线程 ]#R'hL%f //等待子线程返回 pxjN\q try{ %41dVnWB^4 if(bFirst) d=V4,:=S { UfjLNe}wA nFileLength = getFileSize(); L;/#D>U( if(nFileLength == -1) 6g4CUP'Y { 0i\ol9,bf System.err.println("File Length is not known!"); ^tX+<X
} pq_DYG] else if(nFileLength == -2) 4NN-'Z>a { 9+@"DuYc6 System.err.println("File is not access!"); +#8?y
5~q } k1Zu&4C\ else #<f}.P.Uc { |t CD@M for(int i=0;i<nStartPos.length;i++) Sxf|gDC { 3GqJs nStartPos = (long)(i*(nFileLength/nStartPos.length)); GjZ@fnF } cw.Uy(ks|$ for(int i=0;i<nEndPos.length-1;i++) $_ub.g| { HVz-i{M nEndPos = nStartPos[i+1]; ~-x8@ / } 4 q}1 nEndPos[nEndPos.length-1] = nFileLength; ^(m`5]qr7J } f/Km$#xOr } +*,rOK`C W>
.O"Ri S`2M QL //启动子线程 (bt^L3}a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G&:[G>iSm^ for(int i=0;i<nStartPos.length;i++) zr@Bf!VG: { I9*o[Jp5 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x={t}qDS8 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W~p^AHco` nStartPos,nEndPos,i); ASY
uZ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6nt$o)[ fileSplitterFetch.start(); T[xGF/ } A}C&WT~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (ii 5p nq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }D
dg // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?I}jsm1) nEndPos = " + nFileLength); 0uzis09 // fileSplitterFetch[nPos.length-1].start(); U#G
uB&V a8M.EFa: wJ! //等待子线程结束 QNFA#`H //int count = 0; 1pXAPTV //是否结束while循环 ( f8g}2 boolean breakWhile = false; JiZ9ly(G pW8pp? +f\tqucI3 while(!bStop) V'c9DoSRI\ { ']$ttfJB write_nPos(); FU!U{qDI Utility.sleep(500); tnqW!F~ breakWhile = true; U"-mLv"| M7yJ2u <Ty H;*:XLPF for(int i=0;i<nStartPos.length;i++) x)G/YUv76 { WP32t@ if(!fileSplitterFetch.bDownOver) 5yp~PhHf { R.A}tV=j# breakWhile = false; 9L%&4V}BIS break; @l"GfDfL9 } yN{Ybp } %P_\7YBC> if(breakWhile) {0QD-b o break; QC4_\V>[ U,iTURd Y+upZ@Ga //count++; >~BU<# //if(count>4) -2> L*"^ // siteStop(); N$Gx$u3Cd } TW3:Y\ p Aplqxvth -#<,i' System.err.println("文件下载结束!"); Ea\a: } Tj0eW(<!s catch(Exception e){e.printStackTrace ();} -rH4/Iby } m{%_5 nW 2: pq|eiF XF^c(*5 //获得文件长度 @GnsW;$*~. public long getFileSize() h^hEyrJw
{ OFRzz G@ int nFileLength = -1; ]qV J> try{ ip>dHj
z URL url = new URL(siteInfoBean.getSSiteURL()); ::TUSz2/2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y#]Y$n httpConnection.setRequestProperty("User-Agent","NetFox"); y9s5{\H ! \awT !+>yCy$~_ int responseCode=httpConnection.getResponseCode(); }O1F.5I1 if(responseCode>=400) OPKX&)SE- { =PZs'K processErrorCode(responseCode); 5V?1/ return -2; //-2 represent access is error $S,Uoh } |0qk W_sDF; JP ^f`#8G7 ( String sHeader; >F-J}P -w@fd]g =<e# 2 for(int i=1;;i++) ]/$tt@h { aY {. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]iz5VI@ //Utility.log(in.readLine()); Fa/i./V2 sHeader=httpConnection.getHeaderFieldKey(i); Oi7=z?+j if(sHeader!=null) Ak_;GvC! { b-O4IDIT if(sHeader.equals("Content-Length")) /(}V!0\? { eQ9x l nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); e.HN%LrhS break; 4a3f!G$ } Q z/pz_} } V_
]4UE else 5#d(_ break; -8pHjry'q } M?\)&2f[Z } N{q'wep catch(IOException e){e.printStackTrace ();} @+{S-iD" catch(Exception e){e.printStackTrace ();} u!@P,,NY M"_XaVl T\WNT#My Utility.log(nFileLength); {:oZ&y)Ac Fza)dJ7 _c(=> return nFileLength; +2?0]6EQ } PO}Q8Q3 %(kq Hxc t|y4kM //保存下载信息(文件指针位置) 8n73MF
private void write_nPos() 2;&13%@! { >WD^)W fa try{ [7Kn$OfP output = new DataOutputStream(new FileOutputStream(tmpFile)); .(hb8 rCM output.writeInt(nStartPos.length); @qe>ph[UA for(int i=0;i<nStartPos.length;i++) ~/#?OLj(T { DRzpV6s // output.writeLong(nPos); b1&{%.3[ output.writeLong(fileSplitterFetch.nStartPos); b\+|g9Tm output.writeLong(fileSplitterFetch.nEndPos); AnyFg)a< } 0 /kbxpih output.close(); M84LbgGM% } +
zrwz\ catch(IOException e){e.printStackTrace ();} J`8>QMK^5 catch(Exception e){e.printStackTrace ();} cwD0 ~B } 7L\GI`y R5i8cjKZ?w ?ykZY0{B //读取保存的下载信息(文件指针位置) FlgB-qR]<n private void read_nPos() 8qc%{8 { 1Efl|lV try{ SB'YV#-- DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Nb8<8O
^ int nCount = input.readInt(); eHJ7L8# nStartPos = new long[nCount]; %%Kg'{-: nEndPos = new long[nCount]; .;F+ QP0 for(int i=0;i<nStartPos.length;i++) ~^euaOFU 6 { %zD-gw> nStartPos = input.readLong(); k1U~S`>$ nEndPos = input.readLong(); v-gT
3kJ } #,PAM.rH input.close(); {x4[Bx1 } _9@?Th&_e catch(IOException e){e.printStackTrace ();}
^(\Gonf< catch(Exception e){e.printStackTrace ();} __fR #D } /SKr.S61e "[?/I3{E h.9Lh ;j private void processErrorCode(int nErrorCode) _%2Umy| { KVcZ@0[S System.err.println("Error Code : " + nErrorCode); `p{!5 } 9HE(*S R>U<8z"i +7Lco"\w< //停止文件下载 PM.SEzhm public void siteStop() cGc|n3( { Q kZM(pG bStop = true; >h[!gXL^ for(int i=0;i<nStartPos.length;i++) s4gNS
eA fileSplitterFetch.splitterStop(); :ky<`Jfr` 7L+X\oaB U&n>fXTHn } uT/B}`md } {~^)-^Wt: //负责部分文件的抓取 jDX<iX%e **FileSplitterFetch.java |3,V%>z */ k2uiu package NetFox; 1D[P\r- rH9}nL = b!J)] import java.io.*; )h0E$* import java.net.*; ^B5cNEO dn\F! b H?qijrC public class FileSplitterFetch extends Thread { dl6v
< ]kkBgjQbS PS(j)I3 String sURL; //File URL gww^?j# long nStartPos; //File Snippet Start Position E)O|16f|> long nEndPos; //File Snippet End Position GWInN8.5 int nThreadID; //Thread's ID FMdLkyK; boolean bDownOver = false; //Downing is over Dum`o^l# boolean bStop = false; //Stop identical jN%p5nZ^EK FileAccessI fileAccessI = null; //File Access interface Ke?gz:9j %W4aKb?BT PGPbpl&\t public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException N+M&d3H` { *fl{Y(_OO this.sURL = sURL; BO4 K#H7 this.nStartPos = nStart; K@P`_yxN this.nEndPos = nEnd; N
2"3~ # nThreadID = id; RF5q5<0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 [DxefYyI } QG|GXp_q` %x6Ov\s2 -#wVtXaSc public void run() <.WM-Z { e[QxFg0E while(nStartPos < nEndPos && !bStop) %A62xnX { x$n~f:1Y &QTeGn Wzqb>. try{ F@$RV_M URL url = new URL(sURL); )@,90Vhh HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >&;>PZBPCO httpConnection.setRequestProperty("User-Agent","NetFox"); Q)Iv_N/ String sProperty = "bytes="+nStartPos+"-"; hDljY!P>p httpConnection.setRequestProperty("RANGE",sProperty); )[^y
t0% Utility.log(sProperty); $>r>0S#+\& %i$M/C" ( i
Y*o;z,~ InputStream input = httpConnection.getInputStream(); AU)1vx(\w //logResponseHead(httpConnection); +9zJlL^A% vm\wO._ n @&"+ byte[] b = new byte[1024]; EmX>T>~#D int nRead; _ }E-~I> while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2(m85/Hr\; { ,-(T"Ph< nStartPos += fileAccessI.write(b,0,nRead); 7m:|u*ij2~ //if(nThreadID == 1) !/Iq{2LX // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Z5G]p4 } JF~1'"_f: t7w-TJvP x&C%4Y_] Utility.log("Thread " + nThreadID + " is over!"); \3Dk5cSDk+ bDownOver = true; C8IkpAD //nPos = fileAccessI.write (b,0,nRead); v7i^O`{eD? } iq"ob8. catch(Exception e){e.printStackTrace ();} D|@bGN } [%@2o< } {=UFk-$= ]} 61vV 0QMTIAW6h //打印回应的头信息 GX4QaT% public void logResponseHead(HttpURLConnection con) @#RuSc { 4k8*E5cx for(int i=1;;i++) yND"bF9 { V0K16#}1gM String header=con.getHeaderFieldKey(i); lVPOYl% if(header!=null) fUC9-?(K //responseHeaders.put(header,httpConnection.getHeaderField(header)); &+ KyPY+ Utility.log(header+" : "+con.getHeaderField(header)); n( g)UNx else opsQn\4DZ? break; hAm/mu } E2@`d6 } ^ eQFg> %Y~>Jl NXpmT4 public void splitterStop() 5?WYsj"
{ (Uk>?XAr bStop = true; Cyq?5\ a } vT|`%~Be xJ{_qP Wf#VA;d } ,57$N&w 07V8;A<, :ygWNK[6D /* 'JieIKu **FileAccess.java DAfyK?+UL *//文件访问(定位,写) H{l) package NetFox; *U;'OWE[ import java.io.*; +TK3{5`!Ae `K*b?:0lp ';0 qj$# public class FileAccessI implements Serializable{ ,R?np9wc k|xtrW`qo; //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `lO(s%HC RandomAccessFile oSavedFile; :4:N f long nPos; Z\~GU*Y.e j%L&jH6@
.Obn&S public FileAccessI() throws IOException ]5}=^ { \ \06T` this("",0); \8S~c8Z~ } ?-MP_9!JK ?^i1_v7 Bi ljC(L/I public FileAccessI(String sName,long nPos) throws IOException lhH`dG D { >5hhd38 oSavedFile = new RandomAccessFile(sName,"rw"); eg/<[ A: this.nPos = nPos; -`b8T0?oK oSavedFile.seek(nPos);
|l0Ea } QSw<%pcJE@ oR .cSGh HDVW0QaMu public synchronized int write(byte[] b,int nStart,int nLen) ehNzDr\s { :kMHRm@{ int n = -1; z'7[T ie try{ >&,[H:Z oSavedFile.write(b,nStart,nLen); /PzcvN
n = nLen; g7\,{Bw#E } `F t]MR catch(IOException e) 69m
;XdkKz { |4(~%| 8{ e.printStackTrace (); 3S*AxAeg } 1x)ZB~L ^n1%OzGK# q:\g^_!OGA return n; NVKC'==0 } g.py+
ZFJ = ?D(g Fd]\txOXj } +Hvc_Av'' 7 c|bc6? \u,}vppz /* =Prb'8 W **SiteInfoBean.java : _e# */ Byl^?5 package NetFox; !RB)_7 <"N_j]wD sm,VYYs public class SiteInfoBean { ]\-^>!F #K d^03"t0O] N`@NiJ(O; private String sSiteURL; //Site's URL :W#rhuzC private String sFilePath; //Saved File's Path +4;uF]T private String sFileName; //Saved File's Name 5|3e& private int nSplitter; //Count of Splited Downloading File (*}yjUYLZ S$)*&46g ^d}gpin public SiteInfoBean() z]B]QB
Y[ {//nSplitter的缺省值为5 f()FY<b //default value of nSplitter is 5
$`ZzvZ'r this("","","",5); 32DbNEk } zgx&Pte L`f^y;Y. 5oEV-6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) o#) {1<0vg { *IgE)N> sSiteURL= sURL; De7Ts sFilePath = sPath; =4V&*go*\ sFileName = sName; ZkL8 e this.nSplitter = nSpiltter; dQoYCS}IaV 4[Z\
?[ glD cUCF3 } v+p{|X- 0a8/B>
{3;AwhN0H public String getSSiteURL() ;g{qYj_ { O~j> ? return sSiteURL; ojYbR<jn9 } Xq'cA9v=$J EA ]+vq KT]Pw\y5 public void setSSiteURL(String value) ?
WJ> p { ^`un'5Vk sSiteURL = value; S$KFf=0 } >U F f#+el
y 3bO(?l`3h public String getSFilePath() BA\/YW @ { u]}s)SmDk return sFilePath; l/;X?g5+ } B8E'ddUw 4iSa7YqhBT RMMd#/A@} public void setSFilePath(String value) W3`>8v1?o { zJe#m|Z sFilePath = value; f{SB1M } @`\VBW (&/2\0QV }VDqj}is public String getSFileName() wFG3KzEq ~ { *s@Qtgu return sFileName; U
qG
.:@T } {vAE:W.s $w"$r$K9K Ol4+_n8xj public void setSFileName(String value) >S$Z { ss;R8:5 sFileName = value; xsWur(> ] } 5 ae2<Y= F~A 'X [O:
!(Gje public int getNSplitter() SG6sw]x { j*~T1i return nSplitter; ySI~{YVM } VfT*7_ ~-wPP{! j xYc2 public void setNSplitter(int nCount) (O0Urm { R|i/lEq nSplitter = nCount; H'Yh2a`!o } i2~ } V5}B:SUB s-dLZ.9F B"%{i-v>** /* @?h/B=56 **Utility.java 6 uKTGc4 */ Jx'i2&hGN package NetFox; M'_9A Tw + q^6 +!&" public class Utility { B]tIi^ ve&zcSeb DxJX+.9K9 public Utility() 'Ei;^Y 1e { fS^!ZPe1 zt^48~ry ~|<m,)! } a#c6[! 2h?uNW(0Q //线程睡眠 mrX^2SR public static void sleep(int nSecond) ~on(3|$ { b(9FZ]7S try{ >I=2!C1w Thread.sleep(nSecond); ZJlEKib%2 } z0/}
! catch(Exception e) WJ*n29^N^h { %vBhLaE e.printStackTrace (); 4DTzSy:x } `"%T=w } ;E'"Ks[GH OgX6'E\E //日志 ETB6f public static void log(String sMsg) O:da-xWJ { p ;|jI1 System.err.println(sMsg); < y*x]} } m*mm\wN5 |ae97 5 P6MRd/y | public static void log(int sMsg) gzeQ|m2] { >MPr=W%E System.err.println(sMsg); g[w,!F } Z}-Vf$O~ } JMTvSXr n8.kE)? SXt{k<| /* Z{H5oUk **TestMethod.java bGorH=pb5R */ t='# |'); package NetFox; ;[a|9TPR r7Ya\0gU GtwT public class TestMethod { NH0qVQ@A , lJv JsotOic% public TestMethod() /EG~sRvl} { ///xx/weblogic60b2_win.exe 3QpYmX<E try{ e)?Fi SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); frBX{L //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !Kv@\4 SiteFileFetch fileFetch = new SiteFileFetch(bean); (!:cen~|[ fileFetch.start(); )Z %T27r,^ } JAI)Eqqv] catch(Exception e){e.printStackTrace ();} aH#l9kCb bMU(?hb z~A]9|/61v } @JRNb=?a 3"{.37Q ~xoF6CF public static void main(String[] args) 77Bgl4P { pFJB'=c new TestMethod(); k#5}\w! } c5mZG7- } U"50_O 点击下载更多相关资料
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