-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* !t{3IE **SiteFileFetch.java
7<oLe3fbM */ 'u{m37ZJ package NetFox; uY,&lX+! import java.io.*; m]+g[L?- import java.net.*; Xp{+){Iu "44VvpQC 0ho+Y@8 public class SiteFileFetch extends Thread { +%=Ao6/# hJ>{`Tw @/ wJW``; SiteInfoBean siteInfoBean = null; //文件信息Bean T c4N\Cy long[] nStartPos; //开始位置 h2zuPgz, long[] nEndPos; //结束位置 eRD?O FileSplitterFetch[] fileSplitterFetch; //子线程对象 Z+=W gEu1 long nFileLength; //文件长度 jnYFA[Ab boolean bFirst = true; //是否第一次取文件 hUcG3IOBf boolean bStop = false; //停止标志 q[nX<tO File tmpFile; //文件下载的临时信息 .KGW#Qk8 DataOutputStream output; //输出到文件的输出流 _+S`[:;a lq}= &)%C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uR|Jn)/m( public SiteFileFetch(SiteInfoBean bean) throws IOException mZDrvTI' { B9/x?Jv1 siteInfoBean = bean; gdRwh //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3205gI, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;+g
p#&i` if(tmpFile.exists ()) p-GlGEt_X { :;t*:iG bFirst = false; j08}5Eo read_nPos(); cXFNX< } zy~vw6vu else Ka&[
Oz<w { E9;cd$}K nStartPos = new long[bean.getNSplitter()]; !krbGpTVH nEndPos = new long[bean.getNSplitter()]; mEmznA } ~z$vF I#zrz3WU M%7{g"J* $*V:;-H } ='q:Io?T YgNt>4K Wjn1W;m&g public void run() V~tq
_ { %<CahzYc6 //获得文件长度 `$\g8Mo //分割文件 a?/GEfd //实例FileSplitterFetch Fd":\7p //启动FileSplitterFetch线程 $-[V)]h //等待子线程返回 Q<3=s6@T try{
XZLo*C!MG if(bFirst) @tWyc%t { cJd~UQ<k nFileLength = getFileSize(); t8DySFT if(nFileLength == -1) iUJqAi1o { :3M2zV
cf System.err.println("File Length is not known!"); Q3vC^}Dmr } 4d#w} else if(nFileLength == -2) L}*:,&Y/ { {O9CYP: System.err.println("File is not access!"); [x
?38 } JziuwL5, else wN\%b}pp { o@mZ 6!ax3 for(int i=0;i<nStartPos.length;i++) n#[-1(P { k3h,c; nStartPos = (long)(i*(nFileLength/nStartPos.length)); l5F>v!NA
} D]S@U>]M! for(int i=0;i<nEndPos.length-1;i++)
h%0/j { 3JV ENn9 nEndPos = nStartPos[i+1]; T&c0j( } O}I8P")m nEndPos[nEndPos.length-1] = nFileLength; =T;>$&qs } D0Yl?LU3 } 5@ecZ2`)+h mD{<Lp= m=<Tylv //启动子线程 u[q1]] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -B-?z?+(O for(int i=0;i<nStartPos.length;i++) l2QO\O
I9m {
]fvU}4! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4nQk*:p(X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), =p,+a/* nStartPos,nEndPos,i); WL$nchS9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); v!n\A}^: fileSplitterFetch.start(); d0$dQg } 23 j{bK // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~N2){0j4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j&6'sg;n) // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 2`hc0
IE nEndPos = " + nFileLength); C` ?6`$Y // fileSplitterFetch[nPos.length-1].start(); 86NAa6BW W iql c 7\m.xWX e //等待子线程结束 sVtxh] //int count = 0; <`,pyvR Kv //是否结束while循环 ,S5tkTa boolean breakWhile = false; M24FuS eIBHAdU+g/ VU3xP2c: while(!bStop) q"xIW0Pc { #va|&QBZxM write_nPos(); dR~4*59Bg Utility.sleep(500); VN`T:!& breakWhile = true; &$F4/2|b% Jlw%t!Kx
$0>>Z for(int i=0;i<nStartPos.length;i++) sf )ojq6s { I;H6E if(!fileSplitterFetch.bDownOver)
{* S8n09v { 9s\(yC8h breakWhile = false; Gh}k9-L break; ?w6zq| } ?z3c$} } "^E/N},%u5 if(breakWhile) ^DVj_&~ break; \pI)tnu6'U 'PPVM@)fU &2IrST{d:V //count++; 8m,PsUp7 //if(count>4) ]"bkB+I // siteStop(); `L p3snS } [0|g3K!A C"l_78 fy|ycWW>8 System.err.println("文件下载结束!"); %-ih$ZY } n';"c;Ye) catch(Exception e){e.printStackTrace ();} 6J. [9# } hnWo.5;$ P<P4*cOV Uw R,U#d //获得文件长度 m NkS!(L6 public long getFileSize() ]jo^P5\h> { +g36,!q int nFileLength = -1; r,}U-S.w try{ xK4b(KJj URL url = new URL(siteInfoBean.getSSiteURL()); Cb}hE
ro HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); , VZ;= httpConnection.setRequestProperty("User-Agent","NetFox"); b;$ -s
\% ^]mwL)I} tln*Baq int responseCode=httpConnection.getResponseCode(); vd7%#sHH& if(responseCode>=400) OiPE,sv { RqTW$94RD processErrorCode(responseCode); Q*wub9 return -2; //-2 represent access is error Dw}8ci' } :$Lu
V5 _r!''@B M7Ej#Y String sHeader; ]{0R0Gr94 L \0nO i WBTdQG
Q6 for(int i=1;;i++) s8w7/*<d { -:9E+b //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @ yJ/!9?^ //Utility.log(in.readLine()); ,a_F[uK sHeader=httpConnection.getHeaderFieldKey(i); G<.p".o4 if(sHeader!=null) ydp?%RB3w { I#(D.\P if(sHeader.equals("Content-Length")) Xh==F: { $<^4G nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); q^}QwJw break; P;jl!o$ } |a@$KF$ } gE8=#%1< else b~\gV_Z break; ;OW`(jC }
/|] %0B } c_b^t09 catch(IOException e){e.printStackTrace ();} T
xRa&1 catch(Exception e){e.printStackTrace ();} `X?l`H;# uiq)?XUKv 9ls<Y Utility.log(nFileLength); k1y&'3% >O[# 661 k>#,1GbNZy return nFileLength; GCul6,w } p1t9s
N, qe!`LeT# Y604peUF //保存下载信息(文件指针位置) NC::;e private void write_nPos() R{S{N2+p( { b\~rL,7( try{ Eugt~j3 output = new DataOutputStream(new FileOutputStream(tmpFile)); Q%4>okj, output.writeInt(nStartPos.length); O6gI%Jdp for(int i=0;i<nStartPos.length;i++) 88Yp0T<1 { %Bg}
a // output.writeLong(nPos); OI B~W output.writeLong(fileSplitterFetch.nStartPos); w C]yE\P1 output.writeLong(fileSplitterFetch.nEndPos); >69xl^Gd } R7cY$K{j output.close(); 5o\yhYS: } '7[{ISBXU catch(IOException e){e.printStackTrace ();} En3Q% catch(Exception e){e.printStackTrace ();} @TC_XU)& } :av6*&+ c_a*{L|c Bn*D<<{T //读取保存的下载信息(文件指针位置) `/ix[:}m^ private void read_nPos() P7d" E { 4lC:svF try{ Q/4g)( ~J DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1R9hA7y&,/ int nCount = input.readInt(); LoUi Yf nStartPos = new long[nCount]; C)`ZI8 nEndPos = new long[nCount]; |mV*HdqU for(int i=0;i<nStartPos.length;i++) s&Y~48{ { ;hNnF&l nStartPos = input.readLong(); 4\<[y]pv nEndPos = input.readLong(); `Q6@,-(3 }
HB`u@9le input.close(); c ;` } l/;OC catch(IOException e){e.printStackTrace ();} oH!sJ&"#_ catch(Exception e){e.printStackTrace ();} 4W}8?&T } 4%2QF F@ t`03$&Cx7 rs2~spN;h private void processErrorCode(int nErrorCode) %stZ'IX { 3nf+imAF System.err.println("Error Code : " + nErrorCode); VztalwI } 6N\~0d>5m 1eI>Yy>} *\m
53mb //停止文件下载 AS`0.RC- public void siteStop() By6C+)up { VcIsAK".4[ bStop = true; & PrV+Lv for(int i=0;i<nStartPos.length;i++) F>2t=r*9 fileSplitterFetch.splitterStop(); b")&"o)G2W z^I"{eT8 Sj(uc# } QsI#Ae,O#; } BIDmZU9tL //负责部分文件的抓取 K+Al8L?K_ **FileSplitterFetch.java T^S|u8f */ -\\}K\*MJ package NetFox; Xj"/6|X h=YY>
x JT&CJ&#[h import java.io.*; A,e/y import java.net.*; P1=bbMk b|n%l5
1 zC!]bWsD public class FileSplitterFetch extends Thread { 4z Af|Je :Y(Yk5 ;SeDxyKG String sURL; //File URL \`jFy[(Pa' long nStartPos; //File Snippet Start Position D}px=? long nEndPos; //File Snippet End Position COc1np int nThreadID; //Thread's ID vTQQd@ boolean bDownOver = false; //Downing is over R}Uvi9? boolean bStop = false; //Stop identical ~ygiKsD6b FileAccessI fileAccessI = null; //File Access interface t= "EbPE e'(n ^_$nl M:6H%6eT public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'IFbD["r { 0aSN8 this.sURL = sURL; 39S}/S) this.nStartPos = nStart; @jN!j*Y H this.nEndPos = nEnd; =r3Yt9 nThreadID = id; l Vo](#W fileAccessI = new FileAccessI(sName,nStartPos);//定位 F0o7XUt } MG[?C2KA/ z
4Qz9#*"^ B{H;3{0 public void run() Df||#u=n { m/=,O_ while(nStartPos < nEndPos && !bStop) \r^=W= { hz<kR@k} VaJX,Q s) u{A try{ k<ku5U1| URL url = new URL(sURL); s!nFc{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /$\yAOA'y httpConnection.setRequestProperty("User-Agent","NetFox"); I|m fr{ String sProperty = "bytes="+nStartPos+"-"; %<O'\&!, httpConnection.setRequestProperty("RANGE",sProperty); 7.CzS Utility.log(sProperty); {3yzC pwT|T;j* VhT4c+Zs InputStream input = httpConnection.getInputStream(); k`Ab*M$@Xs //logResponseHead(httpConnection); SEr\ u# FlOKTY 5aL0N byte[] b = new byte[1024]; Ooc,R( int nRead; ScQJsFE6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) cInzwdh7 { gmLGK1 nStartPos += fileAccessI.write(b,0,nRead); yrR<F5xge //if(nThreadID == 1) ,@R~y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,COSpq]6 } =\J^_g4-l ?#ndMv!$ ~PHAC@pU Utility.log("Thread " + nThreadID + " is over!"); ;x@9@6_ bDownOver = true; f5
wn`a~h //nPos = fileAccessI.write (b,0,nRead); #lM!s } pTOS}A[dh catch(Exception e){e.printStackTrace ();} t&mw@bj } mc?5,oz;pz } W~.1f1) L=Dd` mdypZ 1f_ //打印回应的头信息 r|fJ~0z public void logResponseHead(HttpURLConnection con) p !AQ { 1FjA for(int i=1;;i++) |bi"J;y { nFzhj%Pt; String header=con.getHeaderFieldKey(i); (jPN+yQ if(header!=null) 3VCyq7B^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); d5T0#ue/e Utility.log(header+" : "+con.getHeaderField(header)); Fq&@dxN3 else 1e'-rm
F break; i'L7t!f}o } pHsp]a } x(hUQu 6 S!#7]wtbP Xleoh2&M public void splitterStop() TA`*]*O( {
b?CmKiM% bStop = true; CP7Zin1S/w } xRv1zHZ ?fnJ`^|-r ti`z:8n7 } 5ii`!y }qmZ "h_n/}r= /* NqkRR$O **FileAccess.java JXftQOn *//文件访问(定位,写) 2OAh7 '8< package NetFox; 6y%BJU.I import java.io.*; rP2^D[uM. ]0ouJY
Y_p public class FileAccessI implements Serializable{ l#~Sh3@L(
_"%d9B //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 T d4 /3k RandomAccessFile oSavedFile; {h&*H[Z z long nPos; +m:U9K(\h >P>.j+o/ }}cVPB7 public FileAccessI() throws IOException 9D(M>'Bh { AjAmV
hq this("",0); 7T_g?!sdMh } x\3 ` W +z>*m`}F 8BE OE< public FileAccessI(String sName,long nPos) throws IOException ,{%/$7) { qq[2h~6P] oSavedFile = new RandomAccessFile(sName,"rw"); .oaW#f}0P this.nPos = nPos; A.
U< oSavedFile.seek(nPos); @r+ErFI } GQ2&D}zh z;#}uC Iy8gQdI public synchronized int write(byte[] b,int nStart,int nLen) []3xb`<& { hB P]^~( int n = -1; qAR~js`5 try{ VG&|fekF oSavedFile.write(b,nStart,nLen); 6\4oHRJC n = nLen; S,G=MI" } fR6ot#b catch(IOException e) Fdm7k){A { MukPY2[Am e.printStackTrace (); Z>o;Yf[ } kVkV~ @ewQx| Y8m|f return n; C([;JO
11[ } v}xz`]MW<, AJt0l|F y"e'Gg2 } FxM`$n~K HY5g>wv@ (}4tj4d /* \dIIZSN **SiteInfoBean.java "h$A. S */ Yx(?KN7V? package NetFox; YOGwQ K+ ufcct Y<w2_ +( public class SiteInfoBean { yHr/i) c /
DeIs EZ1H0fm private String sSiteURL; //Site's URL VG2TiR1 private String sFilePath; //Saved File's Path D?@330'P9C private String sFileName; //Saved File's Name KNIYar*3 private int nSplitter; //Count of Splited Downloading File vq( @B J24UUZ9&$ H&mw!=FV0 public SiteInfoBean() u6t.$a!5 {//nSplitter的缺省值为5 pL-p //default value of nSplitter is 5 xzW]D0o0 this("","","",5); ^uIZs}=+ } ;OPz T9 ws?p2$ Cla }(op;7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) g3LAi#m { N=tyaS(YJ sSiteURL= sURL; "* %=k%' sFilePath = sPath; cQ*:U@ sFileName = sName; oIoJBn this.nSplitter = nSpiltter; S@N&W&W#~ #`y7L4V*o 6dC!&leNi } 9p2"5x ,8+SQo#3 !?O:%QG public String getSSiteURL() z[ z'.{;D { p*#SSR9< return sSiteURL; [7|}h/ } ;op+~@*! qO&:J\d e3)rF5pp public void setSSiteURL(String value) Ug3PZ7lK { -Zocu<Rs sSiteURL = value; ;#`Z(A} } f7d) y'2K7\>E xx!o]D-} public String getSFilePath() >/5D/}4 { ;`X -.45 return sFilePath; kl3#&>e } dE/Vl/ : 5_G7XBvD/w #3kR}Amow public void setSFilePath(String value) 2}~1poyi> { ',m,wp` sFilePath = value; `j_R ?mY } <|
Xf4. Qi6vP& Zm&Zz^s public String getSFileName() 8{%/!ylJz { N7+K$)3 return sFileName; 0)k%nIhj } j(/"}d3osm RTLu]Bry `!!A;G7Qg public void setSFileName(String value) h^x7[qe { cl:*Q{(Cjk sFileName = value; AGK+~EjL@ } g@B9i= #\%GrtM uZd)o
AB public int getNSplitter() ;)"r^M)): { MSRIG- return nSplitter; [OH>NpL } T_v ou,W|<% nHyWb6 public void setNSplitter(int nCount) G\jr^d\ { 5XFhjVmEL nSplitter = nCount; (Clf]\_II } k(%RX_]C } $dorE~T e!eWwC9u rLh490@ /* ,_\h)R_ **Utility.java <0v'IHlZ8 */ .N/4+[2p( package NetFox; /~gM,* <pK;D V&h,v%$ public class Utility { eA{,=,v) t
m5>J)C 9L!Vj J public Utility() 4.H!rkMM { ``aoLQc` >%Y.X38Z[ ,A[HYc|uy } ]vKxgfF 7F}I.,<W //线程睡眠 rrbCg( public static void sleep(int nSecond) -W+dsZ Sv8 { Srol0D I try{ mz9Kwxe Thread.sleep(nSecond); {D`F$=Dlw } w$61+KH K catch(Exception e) b$rBxe\ { zx=A3I%7 A e.printStackTrace (); 1REq.%/= } 6D0uLh } P5] cEZ n *$ ^ME //日志 nU`vj`K
public static void log(String sMsg)
"thfd"- { G>#L System.err.println(sMsg); kE6\G}zj } g\ <Lb ^9cqT2:t
JhB{aW> public static void log(int sMsg) v oC<
/}E { :V+t|@m5l System.err.println(sMsg); `pII-dSC% } rp(`V@x3 } &,NHk9.aq YdC:P#
Nf ]S;e#u{QE /* f)"O( c **TestMethod.java e[Q(OV5(R */ ^+,mxV'8! package NetFox; #i)h0ML/e :,GsbNKW nM
R_ ?g public class TestMethod { !aLByMA \ZCc~muR $t}L|"=8X public TestMethod() ap;*qiNFQ { ///xx/weblogic60b2_win.exe i$%;z~#wW try{ 63:ZDQ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); S&.DpsK //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Oe2Tmvl SiteFileFetch fileFetch = new SiteFileFetch(bean); E.6^~'/ fileFetch.start(); {
"$2 } __3Cjo^6& catch(Exception e){e.printStackTrace ();} @["Vzg!I6" y}#bCRy~.A D}b+#G(m[ }
kQX,MP( G=~T)e U%w-/!p public static void main(String[] args) %o^'(L@z { 6pr}A new TestMethod(); OaU$ [Z'8 } ?*}V>h 8m) } Z(Q?epyT 点击下载更多相关资料
|